Abrégé

The present application relates to the field of computers. Disclosed are a trajectory processing method and apparatus and a computer-readable storage medium. The processing method comprises: acquiring a plurality of trajectory points; and, if target deviation data between the plurality of trajectory points does not meet a preset requirement, executing deviation rectification processing, i.e. acquiring deviation rectification data and, according to the deviation rectification data, executing the deviation rectification processing of the trajectory points. Thus, the method can achieve the technical effect of accurately generating a map according to trajectory points, and improve trajectory generation efficiency and accuracy.

Classes IPC  ?

• G01C 21/32 - Structuration ou formatage de données cartographiques
• G01C 21/00 - NavigationInstruments de navigation non prévus dans les groupes

Abrégé

The present disclosure relates to a motor. The motor includes a shaft extending in an axial direction, an inner rotor fixed on the shaft, an outer stator sleeved on the inner rotor, and a fan on the shaft. The fan can rotate with the shaft to generate airflow to cool the outer stator. The motor further includes an air-guiding cover including a first air-guiding ring and a second air-guiding ring arranged along the axial direction. The first air-guiding ring is located between the outer stator and the second air-guiding ring. The fan is located within the second air-guiding ring. The first air-guiding ring has an inner diameter d3, the outer stator has a first inner diameter d1, and the inner diameter d3 is greater than or equal to the first inner diameter d1. The heat dissipation effect is significantly improved.

Classes IPC  ?

• H02K 9/06 - Dispositions de refroidissement ou de ventilation par l'air ambiant s'écoulant à travers la machine comportant des moyens pour établir la circulation d'un agent de refroidissement avec des ventilateurs ou des dispositifs d'entraînement mûs par l'arbre de la machine
• B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
• B25F 5/02 - Structure des boîtiers, corps ou poignées
• H02K 7/14 - Association structurelle à des charges mécaniques, p. ex. à des machines-outils portatives ou des ventilateurs
• H02K 21/16 - Moteurs synchrones à aimants permanentsGénératrices synchrones à aimants permanents avec des induits fixes et des aimants tournants avec des aimants tournant à l'intérieur des induits avec des noyaux d'induits annulaires à pôles saillants

Abrégé

A compensation system and method for a zero-crossing voltage of back electromotive force of a brushless direct current motor (BLDCM) are provided. The compensation system includes: a direct current power supply; a three-phase inverter, connected to the direct current power supply and the BLDCM; a back electromotive force detection module configured to detect terminal voltages of three phases when the BLDCM is in operation; and a controller, connected to the three-phase inverter through the back electromotive force detection module. The compensation system further includes a current acquisition module connected between the direct current power supply and the controller, and the current acquisition module is configured to acquire a bus current value when the BLDCM is in operation; the controller includes a voltage compensation module connected to the back electromotive force detection module. A bus current threshold is preset in the voltage compensation module.

Classes IPC  ?

• H02P 23/00 - Dispositions ou procédés pour la commande de moteurs à courant alternatif caractérisés par un procédé de commande autre que la commande par vecteur
• H02P 25/03 - Moteurs synchrones avec excitation sans balai

Abrégé

A handheld high-pressure cleaning machine, comprising a pump unit (4), an electric motor assembly (1), a transmission assembly (2) and a plunger (88), wherein the transmission assembly (2) is provided with a box housing (21), the plunger (88) is at least partially located in the box housing (21) and extends into the pump unit (4), and the transmission assembly (2) drives the plunger (88) to reciprocate in the pump unit (4) so as to pump water; the transmission assembly (2) comprises a pressurizing mechanism (80) abutting against the plunger (88), wherein the pressurizing mechanism (80) is located in the box housing (21), the pump unit (4) is provided with a pressure chamber (42) for accommodating the plunger (88), and the pressurizing mechanism (80) and the pressure chamber (42) are located at two ends of the plunger (88). The pressurizing mechanism (80) has a first stage for storing energy and a second stage for releasing energy, and in the first stage, the transmission assembly (2) drives the plunger (88) to store energy for the pressurizing mechanism (80); and in the second stage, the transmission assembly (2) drives the plunger (88) to pressurize the pressure chamber (42), and the pressurizing mechanism (80) applies, to the plunger (88), an acting force towards the pressure chamber (42). The handheld high-pressure cleaning machine has an extremely high working efficiency.

Classes IPC  ?

• F04B 17/03 - Pompes caractérisées par leur combinaison avec des machines motrices ou moteurs particuliers qui les entraînent ou par leur adaptation à ceux-ci entraînées par des moteurs électriques
• F04B 53/00 - Parties constitutives, détails ou accessoires non prévus dans les groupes ou ou présentant un intérêt autre que celui visé par ces groupes
• B08B 3/02 - Nettoyage par la force de jets ou de pulvérisations
• B08B 13/00 - Accessoires ou parties constitutives, d'utilisation générale, des machines ou appareils de nettoyage

Abrégé

The present application discloses an electric work vehicle control method and an electric work vehicle. The control method comprises: an electric work vehicle measuring a workload and establishing a communication connection with a mobile electronic device; the mobile electronic device receiving workload information to prompt a user to change a working gear or, in an automatic mode, according to the workload information, automatically match a suitable gear; the electric work vehicle receiving a gear adjustment operation instruction sent by the mobile electronic device, to adjust a working motor; and when it is determined that a user has adjusted the gear of the work vehicle by means of an operation assembly on the electric work vehicle, an information transmission unit synchronizing adjusted gear information to the mobile electronic device and feeding same back to the user. In the present application, a communication connection is established between the electric work vehicle and the mobile electronic device, and the user can remotely monitor and control the electric work vehicle, so that the gear of the electric work vehicle can be adjusted according to the load, and the range of the electric work vehicle is improved.

Classes IPC  ?

• A01D 34/00 - FaucheusesAppareils de fauchage des moissonneuses

Abrégé

A power tool, including: a housing, extending in a longitudinal direction; and a fan, a motor, and a circuit board that are received in the housing. The housing defines an air outlet, a first air inlet, and a second air inlet. The first air inlet is adjacent to the motor, and the second air inlet is adjacent to the circuit board; the first air inlet is disposed between the air outlet and the second air inlet. The power tool includes a first heat dissipation air path that flows through the motor and a second heat dissipation air path that flows through the circuit board. The motor includes an output shaft extending along the longitudinal direction. The output shaft is connected to the fan; the air outlet, the fan, the first air inlet, and the second air inlet are arranged sequentially in an axis direction of the output shaft.

Classes IPC  ?

• B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
• B24B 23/02 - Machines de meulage portatives, p. ex. à guidage manuelAccessoires à cet effet comportant des outils de meulage rotatifsAccessoires à cet effet

Abrégé

Disclosed is a dust collecting device includes a main housing; a suction pipe disposed on the main housing, wherein the suction pipe has a degree of freedom for moving relative to the main housing along the length direction of the suction pipe; a first stop portion for limiting the moving distance of the suction pipe toward the main housing, wherein the first stop portion is disposed on the suction pipe and has a degree of freedom for moving relative to the suction pipe along the length direction of the suction pipe; and a first operation portion for limiting the moving distance of the first stop portion relative to the suction pipe, wherein the first operation portion is disposed on the main housing.

Classes IPC  ?

• B23Q 11/00 - Accessoires montés sur les machines-outils pour maintenir les outils ou les organes de la machine dans de bonnes conditions de travail ou pour refroidir les pièces travailléesDispositifs de sécurité spécialement combinés aux machines-outils, disposés dans ces machines ou spécialement conçus pour être utilisés en relation avec ces machines
• B25D 16/00 - Machines portatives à percussion avec rotation superposée

Abrégé

Disclosed in the present application are an alarm method for a mower and a mower. The mower comprises: an electric motor, a pipe, a collection apparatus and a first sensor, wherein the first sensor is placed on the pipe and is close to one side of the collection apparatus. The method comprises: after a mower is started, controlling a transmission module of a first sensor to transmit a sensing signal; detecting whether a receiving module of the first sensor receives the transmitted sensing signal; and when the sensing signal is not detected, sending a first alarm signal. Whether a pipe is blocked is determined by determining the reception of a sensing signal, such that an alarm is raised when a collection apparatus is fully loaded or a transfer pipe is blocked, thus solving the problem of a mower being blocked and stopped due to the full load of a collection apparatus or the blockage of a transfer pipe.

Classes IPC  ?

• A01D 34/00 - FaucheusesAppareils de fauchage des moissonneuses

Abrégé

The present application discloses an electric mower. The electric mower is provided with a plurality of mowing motors, and a control device for controlling the plurality of mowing motors to operate. The control device can adaptively determine, on the basis of an actual load of each mowing motor, operating parameters required by each corresponding mowing motor, and further, after the operating parameters of each mowing motor are determined, configure a different weight for each mowing motor on the basis of a traveling direction and grass discharging, and comprehensively configure the operating parameters for each mowing motor again, so that each mowing motor is suitable for a corresponding load so as to save energy consumption, and meets grass discharging requirements so as to avoid the stall of each mowing motor or the blockage of a grass discharging port.

Classes IPC  ?

• H02P 5/46 - Dispositions spécialement adaptées à la régulation ou la commande de la vitesse ou du couple d’au moins deux moteurs électriques pour la régulation de vitesse de plusieurs moteurs dynamo-électriques en relation les uns avec les autres
• A01D 34/685 - FaucheusesAppareils de fauchage des moissonneuses caractérisés par des particularités relatives au type d'appareil de coupe comportant des couteaux rotatifs comportant des couteaux tournant autour d'un axe vertical dirigés à la main par un opérateur à pied à couteaux ou à roues entraînés par un moteur à plusieurs couteaux

Abrégé

Provided in the embodiments of the present description are an electric working vehicle, an electric garden operation vehicle and an electric ride-on mower, which can accurately identify a sudden change in a heavy load in a timely manner and take a corresponding control measure, thereby improving the stability of a whole machine, and optimizing the application experience of a user. The electric working vehicle comprises: a functional electric motor, which has a plurality of operation parameters, and a plurality of control policies correspondingly matching the plurality of operation parameters; and a heavy-load identification unit, which is configured to select from among the plurality of operation parameters a target operation parameter which does not match the currently used first control policy for monitoring, and to determine according to the target operation parameter and/or a change situation of the target operation parameter whether the functional electric motor enters a heavy-load state. In response to determining that the functional electric motor enters the heavy-load state, a heavy-load control unit controls and adjusts the functional electric motor, such that the functional electric motor exits the heavy-load state.

Classes IPC  ?

• H02P 29/02 - Protection contre les surcharges sans interruption automatique de l’alimentation
• B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
• A01D 34/00 - FaucheusesAppareils de fauchage des moissonneuses
• G01R 31/34 - Tests de machines dynamoélectriques
• G01D 21/02 - Mesure de plusieurs variables par des moyens non couverts par une seule autre sous-classe

Abrégé

A vehicle control method, a multi-purpose vehicle, and a garden work vehicle, capable of ensuring an accurate response to a manipulation intention of a user, and optimizing user experience. The multi-purpose vehicle comprises a driving mechanism, a manipulation mechanism, and an auxiliary control mechanism. The auxiliary control mechanism comprises: a manipulation state sensing assembly, used for determining a manipulation state of a user for the manipulation mechanism, the manipulation state comprising a linear manipulation state and a non-linear manipulation state; a running state sensing assembly, used for determining a running state of a multi-purpose vehicle, the running state comprising a linear running state and a non-linear running state; and a calibration controller assembly, used for determining, when the running state does not match the manipulation state, that the multi-purpose vehicle is abnormally running, wherein the calibration controller assembly is further used for adjusting an operating state of the driving mechanism after determining that the multi-purpose vehicle is abnormally running, so as to enable the running state to match the manipulation state.

Classes IPC  ?

• B60W 30/10 - Maintien de la trajectoire
• G01C 21/34 - Recherche d'itinéraireGuidage en matière d'itinéraire
• A01D 34/00 - FaucheusesAppareils de fauchage des moissonneuses

Abrégé

Disclosed in the present application are an adaptive control method for an electric motor load, and an outdoor operation vehicle. In the control method, correspondences between operation parameters of an electric motor and a load, correspondences between the operation parameters and performance parameters of the electric motor, and upper and lower boundary threshold values of the load are pre-stored, real-time operation parameters and load parameters are compared to obtain a matching situation, and the performance parameters of the electric motor are adjusted by means of straight-line or curve fitting, so as to adapt to the load, wherein the means by which the performance parameters of the electric motor are adjusted comprise increasing/decreasing the power of the electric motor, increasing/decreasing the rotation speed of the electric motor, increasing/decreasing the current of the electric motor, and increasing/decreasing the torque of the electric motor. The problem in the prior art whereby it is impossible to automatically adjust the output of a mowing electric motor of a ride-on mower or an adjustment is inaccurate is solved, thereby improving the endurance of the whole ride-on mower.

Classes IPC  ?

• H02P 6/00 - Dispositions pour commander les moteurs synchrones ou les autres moteurs dynamo-électriques utilisant des commutateurs électroniques en fonction de la position du rotorCommutateurs électroniques à cet effet
• H02P 6/08 - Dispositions pour commander la vitesse ou le couple d'un seul moteur
• H02P 6/06 - Dispositions pour la régulation de la vitesse d'un seul moteur dans lesquelles la vitesse du moteur est mesurée et comparée à une grandeur physique donnée pour ajuster la vitesse du moteur
• A01D 34/00 - FaucheusesAppareils de fauchage des moissonneuses

Abrégé

A handheld electric tool, comprising: a housing (1); an electric-motor assembly (2) and a transmission assembly (3), which are mounted in the housing (1); a switch assembly (4), which is connected to the electric-motor assembly (2); a gear shifting assembly (5), which is connected to the transmission assembly (3); and an output end (20), which is driven by the transmission assembly (3), wherein the switch assembly (4) comprises a switch element (41) mounted in the housing (1), and a trigger (42) for triggering the switch element (41); the gear shifting assembly (5) comprises a gear shifting element (51) connected to the transmission assembly (3), and a button (52) for moving the gear shifting element (51); the switch assembly (4) is a speed regulation switch and regulates an output rotation speed of the electric-motor assembly (2) by means of a pressing stroke of the trigger (42); the trigger (42) comprises a base (421) and a limiting portion (422) arranged on the base (421); and the gear shifting assembly (5) comprises a stop portion (53) corresponding to the limiting portion (422), and the limiting portion (422) abuts against the stop portion (53). The handheld electric tool can output a force at a lower rotation speed required by a user, and can break through the limitation that a traditional planetary gear speed reducer cannot achieve the ratio of the rotation speed in a high-speed gear state to the rotation speed in a low-speed gear state being less than 3, thereby effectively meeting diversified working requirements of users.

Classes IPC  ?

• B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs

Abrégé

A handheld power tool, comprising a housing (1), a motor assembly (2), a transmission assembly (3), a switch assembly (4), a gear shifting assembly (5) and an output end (20). The switch assembly (4) comprises a switch element (41) mounted on the housing (1) and a trigger (42) for triggering the switch element (41); the gear shifting assembly (5) comprises a gear shifting element (51) connected to the transmission assembly (3) and a button (52) for moving the gear shifting element (51); the switch assembly (4) is a speed regulation switch and regulates the output rotating speed of the motor assembly (2) by means of the pressing stroke of the trigger (42); the gear shifting assembly (5) comprises a connecting rod (53) connected to the button (52) and a stop portion (54) mounted on the connecting rod (53); the switch assembly (4) comprises a connecting member (43) provided between the switch element (41) and the trigger (42); the connecting member (43) comprises a connecting portion (431) abutting between the trigger (42) and the switch element, and a limiting portion (432) connected to the connecting portion (431); the limiting portion (432) abuts against the stop portion (54). According to the handheld power tool, in the pressing process of the trigger, the limiting portion abuts against the stop portion, the trigger cannot be pressed completely, the maximum output rotating speed of the motor assembly is limited, and the output end can output a force at a lower rotating speed required by a user.

Classes IPC  ?

• B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs

Abrégé

A handheld power tool, comprising a housing (1), a motor assembly (2), a transmission assembly (3), a switch assembly (4), and a shift assembly (5). The switch assembly (4) comprises a switch element (41) mounted on the housing (1) and a trigger (42) for triggering the switch element (41). The shift assembly (5) comprises a shift element (51) connected to the transmission assembly (3) and a button (52) for moving the shift element (51). The housing (1) comprises a main body part (11) for accommodating the motor assembly (2) and the transmission assembly (3), and a holding part (12) connected to the main body part (11). The switch assembly (4) is mounted on the holding part (12). The trigger (42) comprises a base body (421) and a limiting part (422) arranged on the base body (421). The shift assembly (5) comprises a stop part (53) corresponding to the limiting part (422), and the limiting part (422) abuts against the stop part (53), so that the trigger cannot be pressed to the bottom. The button moves along a second axis perpendicular to a first axis of the motor assembly, and the button is located between the transmission assembly and the switch assembly. The handheld power tool is simple to operate and achieves a good user experience, and the tool can be normally used in a narrow space.

Classes IPC  ?

• B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs

Abrégé

Provided in the present invention are a control method and control apparatus for a rotor, and a computer-readable medium. The method comprises: acquiring, by means of a processing module in an apparatus, position information and the rotation direction of a rotor; according to the position information and the rotation direction, determining a first control signal and a first detection signal, wherein the first control signal is used for implementing rotation control over the rotor, and the first detection signal is used for implementing detection on a rotation state of the rotor; and according to a detection result, determining whether the rotation direction changes. In the present invention, during the rotation process of a rotor, a corresponding detection signal is determined by means of non-inductive control and according to the position and rotation direction of the rotor, and whether an electric motor rotates reversely can be accurately determined according to a detection result, thereby effectively improving the detection accuracy; moreover, when the electric motor rotates reversely, a phase adjustment is made, which ensures that the electric motor continues to output a forward-rotation torque, such that control over the electric motor does not become out of step.

Classes IPC  ?

• H02P 6/18 - Dispositions de circuits pour détecter la position sans éléments séparés pour détecter la position
• H02P 6/182 - Dispositions de circuits pour détecter la position sans éléments séparés pour détecter la position utilisant la force contre-électromotrice dans les enroulements
• H02P 6/08 - Dispositions pour commander la vitesse ou le couple d'un seul moteur
• H02P 21/18 - Estimation de la position ou de la vitesse

Abrégé

A power tool (100), comprising a housing (10), a motor (20) accommodated in the housing (10), a transmission mechanism (30), and an impact mechanism (40). The impact mechanism (40) comprises a cylinder (41), and an impact rod (45), a guide device (50), a striker (44), and a piston (43) that are arranged in the cylinder (41); when the impact rod (45) moves in the direction opposite to an output direction, a second guide portion (52) sequentially supports a third section (453) and a second section (452); the diameter of the third section (453) is smaller than that of the second section (452); by increasing a gap between the second guide portion (52) and the third section (453), the impact rod (45) inclines relative to the axis of the cylinder (41) and then moves; when the power tool is unloaded, the inclination consumes energy of the impact rod (45) moving in the opposite direction to prevent the impact rod (45) from bringing the striker (44) away from a locking portion (49), thereby preventing the striker (44) from generating impact during no-load and affecting the service life of the power tool (100); and before the impact rod (45) is impacted, the second guide portion (52) supports the second section (452), at this time, the axis of the impact rod (45) coincides with the axis of the cylinder (41), the striker (44) impacts the impact rod (45) in the linear direction, and the impact rod (45) performs impact output in the linear direction, thereby improving the energy transmission efficiency.

Classes IPC  ?

• B25D 17/24 - Amortissement de contrecoup
• B25D 11/04 - Outils portatifs à percussion entraînés par moteur électrique dans lesquels la tête de l'outil ou l'enclume est frappée par une pièce en mouvement
• B25D 17/00 - Parties constitutives ou accessoires d'outils portatifs à percussion actionnés mécaniquement

Abrégé

The present invention relates to a method for adjusting a short-circuit protection value, an electric tool, and a computer-readable medium. The method for adjusting a short-circuit protection value comprises the following steps: S1: a sampling module acquires a voltage value of an NTC resistor; S2: an MCU calculates a temperature value of an MOS transistor according to the acquired voltage value of the NTC resistor; S3: the MCU determines a temperature interval within which the temperature value of the MOS transistor falls; and S4: the MCU calculates a corresponding short-circuit protection value according to the temperature interval, the short-circuit protection value being in a linear relationship with the temperature interval, and the short-circuit protection value decreasing as the temperature interval increases. According to the method for adjusting a short-circuit protection value provided by the present invention, the MOS transistor can be more effectively protected, and when the MOS transistor is in a high-temperature state and the value of current borne thereby is small, the MOS transistor is effectively protected from being burnt out. Moreover, the method can effectively overcome damage to a circuit caused by the occurrence of a locked-rotor condition when the MOS transistor is in the high-temperature state, and prolongs the service life of a tool.

Classes IPC  ?

• H02H 5/04 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions non électriques normales de travail avec ou sans reconnexion sensibles à une température anormale
• H02H 1/00 - Détails de circuits de protection de sécurité
• H02H 7/085 - Circuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour moteurs dynamo-électriques contre une charge excessive

Abrégé

The present invention relates to an intelligent device, a battery pack information input method, and a computer-readable medium. The intelligent device comprises a man-machine interaction module and an information conversion module and is used for inputting information into a battery pack. The battery pack information input method comprises: setting input information of a battery pack on a man-machine interaction module; the information conversion module converting the input information into configuration information that meets the communication requirement of the battery pack and sending the configuration information to the battery pack; the battery pack storing the configuration information into memory; and the intelligent device reading the configuration information in the battery pack memory and compares and verifies the configuration information against the input information. The battery pack information input method provided by the present invention enables the intuitive input of production information and charging and discharging information of a battery pack during its production, features a verification function to effectively avoid input errors, and can input a lot of information, meeting the rapidly growing demand for detailed categorization of battery packs.

Classes IPC  ?

• G06Q 10/10 - BureautiqueGestion du temps
• H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries

Abrégé

A dust collecting device (100), comprising a dust collecting body (10) and a dust collecting box (20) inserted into the dust collecting body (10), wherein the dust collecting body (10) has an engaging portion (12) for receiving the dust collecting box (20); and an outer surface of one of a buckle plate (22) of the dust collecting box (20) and a first side wall (121) of the engaging portion (12) is provided with protrusions (223, 223'), which are higher than a sealing gasket (222), and the other one is provided with snap-fit recesses (1212, 1212'), which are recessed along the outer surface and match the protrusions (223, 221'), such that when the dust collecting box (20) is inserted toward the dust collecting body (10), the protrusions (223, 223') slide along the outer surface of one of the first side wall (121) and the buckle plate (22).

Classes IPC  ?

• B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
• B25D 17/00 - Parties constitutives ou accessoires d'outils portatifs à percussion actionnés mécaniquement
• B25D 16/00 - Machines portatives à percussion avec rotation superposée

Abrégé

The present invention provides a safety control method, an intelligent device and a computer readable medium. The method comprises: obtaining a plurality of angle values corresponding to each space angle in different space angles; determining a deviation value of each space angle according to the maximum value and the minimum value among the plurality of angle values corresponding to each space angle; determining an error value according to the deviation value of each space angle; and determining, according to the deviation value and/or the error value, whether to trigger a protection operation. In the process of triggering a safety operation, interaction between different space angles is comprehensively considered, false triggering of safety operations is effectively avoided, and the control accuracy of anti-torsion operations is improved. Moreover, according to the scheme provided by the present invention, the adjustment of the accuracy of trigger operations is supported, the safety requirements of different users can be met, and the user experience is improved.

Classes IPC  ?

• B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs

Abrégé

A dust collection device and an electric tool. The dust collection device comprises: a main machine housing; a dust collection box arranged in the main machine housing, wherein the dust collection box is provided with a filter; and a suction pipe assembly arranged on the main machine housing, wherein a dust guide channel in communication with the dust collection box is formed in the suction pipe assembly, the suction pipe assembly comprises an outer pipe arranged on the main machine housing in a manner of moving back and forth and an inner pipe arranged in the outer pipe in a manner of moving back and forth, a front end of the inner pipe is provided with a suction opening in communication with the dust guide channel, the suction pipe assembly further comprises a locking assembly, and the locking assembly locks the inner pipe in the outer pipe at least when the inner pipe completely retracts into or completely extends from the outer pipe. The dust collection device provided in the present invention can be applied to various scenarios.

Classes IPC  ?

• B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
• B23B 45/02 - Perceuses tenues à la main ou perceuses analogues portatives, p. ex. en forme de pistoletÉquipement à cet effet entraînées électriquement
• B23B 45/00 - Perceuses tenues à la main ou perceuses analogues portatives, p. ex. en forme de pistoletÉquipement à cet effet
• B23Q 11/00 - Accessoires montés sur les machines-outils pour maintenir les outils ou les organes de la machine dans de bonnes conditions de travail ou pour refroidir les pièces travailléesDispositifs de sécurité spécialement combinés aux machines-outils, disposés dans ces machines ou spécialement conçus pour être utilisés en relation avec ces machines

Abrégé

The present invention relates to a chain saw, provided with a guide plate extending in a longitudinal direction and a chain sleeved on the periphery of the guide plate. The chain saw comprises a housing, a driving assembly and a chain wheel connected to the driving assembly; the driving assembly comprises a driving shaft extending out of the housing in an axial direction; the chain wheel is sleeved at the axial tail end of the driving shaft, the chain is at least partially wound on the chain wheel, and the driving shaft drives, by means of the chain wheel, the chain to rotate along the periphery of the guide plate; the chain saw comprises a supporting assembly mounted on the axial outer side of the chain wheel, and the supporting assembly abuts against at least one of the chain and the chain wheel in the axial direction. In the present invention, the chain is pressed in advance by means of the supporting assembly, and when a chain wheel cover is mounted, a user does not need to additionally support the other end of the guide plate, so that time and labor are saved; moreover, the situation where due to the roughness of the guide plate, the chain is in excessive contact with a gasket to be stuck, resulting in the device failing to start up after the chain is tightened can be avoided. In addition, a wave-shaped pressing plate of the supporting assembly compensates for an axial gap at the chain wheel, thereby avoiding axial movement between parts, and effectively reducing noise.

Classes IPC  ?

• B27B 17/02 - Scies à chaîne pourvues de guide-chaîne
• B27B 17/00 - Scies à chaîneAccessoires ad hoc
• B27B 17/14 - Systèmes pour tendre la chaîne
• B23D 57/02 - Machines à scier ou dispositifs de sciage non couverts par l'un des groupes à scies à chaîne
• A01G 3/08 - Autres outils à élaguer, émonder ou ébrancher des arbres sur pied
• A01G 23/091 - Appareils de sciage spécialement adaptés pour abattre des arbres

Abrégé

A dust collection device, comprising a main machine housing, and a dust collection box and a suction pipe assembly which are mounted on the main machine housing. The suction pipe assembly comprises an outer pipe movably arranged on the main machine housing and an inner pipe axially and movably arranged in the outer pipe. The suction pipe assembly further comprises a locking assembly, and a first stop portion for limiting the outer pipe to retract backwards. The locking assembly locks the inner pipe in the outer pipe, such that the inner pipe can be locked when at least partially retracting into or completely extending out of the outer pipe, thereby preventing the inner pipe from freely moving relative to the outer pipe when the dust collection device adapts to a long drill bit for carrying out short-stroke drilling. The side wall of the outer pipe is further provided with a first scale mark and a second scale mark which are arranged side by side, the first stop portion being adjustably locked onto the main machine housing referring to the first scale mark and the second scale mark. Thus, by arranging the first scale mark and the second scale mark on the side wall of the outer pipe side by side, the dust collection device can precisely control the drilling depth when adapting to drill bits of different lengths for satisfying different requirements of drilling depths.

Classes IPC  ?

• B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
• B08B 1/14 - LingettesÉléments absorbants, p. ex. écouvillons ou éponges

Abrégé

A nail gun maintenance system and method. A maintenance module (5) is added on a circuit board; when a controller (4) detects that the maintenance module (5) is in a low-level state, it is determined that a nail gun is in a maintenance mode; at this time, a trigger module (6) is triggered, and a motor (3) rotates reversely to control an ejection module (7) to be in a relaxed state; and in this state, the nail gun can be directly disassembled and maintained, without the need to look for an external tool for operation.

Classes IPC  ?

• B25C 1/18 - Parties constitutives ou accessoires, p. ex. écrans protecteurs contre les éclats, limiteurs d'éclats
• B25C 1/06 - Outils tenus à la main pour clouerDispositifs d'alimentation en clous pour ces outils actionnés électriquement

Abrégé

Disclosed in the present invention are an electric tool and a discharging system. A battery pack comprises a first positive terminal, a first negative terminal, a first controller, and a first state detection terminal. The electric tool comprises a second positive terminal, a second negative terminal, a second controller, a power supply module for supplying power to the second controller, and a power-on module connected to the power supply module. When the battery pack is connected to the electric tool by insertion, the power-on module is connected to the first state detection terminal; and the first state detection terminal controls on/off of the power-on module according to the state of the battery pack, so as to control whether to power on the electric tool. According to the present invention, by directly connecting the state detection terminal of the battery pack to the power-on module of the electric tool, when an anomaly occurs in the battery pack, the power-on module can be controlled not to be powered on, i.e., the tool is not powered on, so that anomaly protection can be carried out in time, and no loss would be caused when an anomaly occurs in the battery pack.

Classes IPC  ?

• H01M 10/42 - Procédés ou dispositions pour assurer le fonctionnement ou l'entretien des éléments secondaires ou des demi-éléments secondaires
• H01M 50/569 - Détails de construction des connexions conductrices de courant pour détecter les conditions à l'intérieur des cellules ou des batteries, p. ex. détails des bornes de détection de tension
• H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries

Abrégé

121212; detecting changes of a bus voltage within a first time by means of an MCU and calculating an average voltage change rate; estimating a second bus voltage value within a second time according to the average voltage change rate, wherein the second bus voltage value is an estimated bus voltage value; and determining the magnitude relationship between the estimated bus voltage value and a preset value, stopping slow braking when the estimated bus voltage value is greater than the preset value, and continuing to slow brake when the estimated bus voltage value is smaller than the preset value. According to the present invention, during slow braking, braking is performed in advance or stopped by means of estimating the bus voltage value, which solves the problems of voltage rise and electronic component damage during slow braking, and also avoids the problems of excessive direct braking torque, unstable braking transition and poor user experience.

Classes IPC  ?

• H02P 6/24 - Dispositions pour l'arrêt
• H02P 27/08 - Dispositions ou procédés pour la commande de moteurs à courant alternatif caractérisés par le type de tension d'alimentation utilisant une tension d’alimentation à fréquence variable, p. ex. tension d’alimentation d’onduleurs ou de convertisseurs utilisant des convertisseurs de courant continu en courant alternatif ou des onduleurs avec modulation de largeur d'impulsions

Abrégé

Disclosed in the present invention is an anti-sparking method for an electric tool. The method comprises the following steps: (1) turning on a control switch, an electric motor rotating, and an MCU module recording a forward rotation state a or a reverse rotation state b of the electric motor; (2) turning off the control switch, the electric motor starting to stop rotating, and at this time, recording the time from the electric motor starting to stop rotating to the electric motor completely stopping rotating, and recording the time as t1; (3) turning on the control switch again, and at this time, the MCU module recording the forward rotation state a or the reverse rotation state b of the electric motor, if the state is the same as the state in the step (1), the MCU module controlling a power source module to supply power to an electric motor driving module, and if the state is different from the state in step (1), the MCU module controlling the power source module to supply power to the electric motor driving module after delaying a time not less than t1. By using the anti-sparking method provided in the present invention, the internal space of an electric tool can be saved on, the working efficiency is improved, and the cost is saved on.

Classes IPC  ?

• H02P 29/032 - Prévention d’un endommagement du moteur, p. ex. détermination de limites individuelles de courant pour différentes conditions de fonctionnement

Abrégé

The present disclosure relates to a power tool and a control method thereof. The power tool includes a drive assembly, a first output portion, a second output portion, a switching assembly to be operated by a user, an identification unit, a control unit, and a control assembly to be triggered by the user. The switching assembly switches one of the first output portion and the second output portion to be connected to the drive assembly, and the identification assembly identifies a working mode of the power tool. In response to a first working mode, the control unit controls the first control assembly to be in an effective state, and the control unit controls an operating state of the first output portion according to a signal input by the first control assembly; in response to a second working mode, the control unit controls the first control assembly to be in an ineffective state.

Classes IPC  ?

• B25F 5/02 - Structure des boîtiers, corps ou poignées
• B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs

Abrégé

The present invention relates to an impact electric tool, comprising a main machine shell, a motor arranged in the main machine shell, a working head driven by the motor, and a transmission mechanism for transmitting power of the motor to the working head, wherein the transmission mechanism comprises a transmission shell and a transmission assembly arranged in the transmission shell. The impact electric tool further comprises a balance block, which is movably arranged on the transmission shell, such that the balance block receives a backward component and an upward component of a counter-acting force of the transmission shell, and a space for the balance block to move therein is formed in the main machine shell. In the present invention, the comfort of using the impact electric tool can be improved.

Classes IPC  ?

• B25D 17/24 - Amortissement de contrecoup

Abrégé

An electric tool system, comprising a switch (3), a motor, a tool control module (102), a tool communication module (101), a power supply module (103), and a battery pack (200). The battery pack (200) comprises a battery pack communication module (203). The tool control module (102) receives a closing signal of the switch (3), controls, according to the closing signal, the motor to run, and measures the running time of the motor. When the running time is a first predetermined time, the tool control module (102) controls the tool communication module (101) and the battery pack communication module (203) to establish communication so as to obtain the state of the battery pack (200).

Classes IPC  ?

• H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
• G01R 31/382 - Dispositions pour la surveillance de variables des batteries ou des accumulateurs, p. ex. état de charge

Abrégé

A push rod mechanism includes a lower push rod and an upper push rod relatively stretchable and retractable, and a telescopic control assembly. The lower push rod is provided with a through hole passing through a side wall. The telescopic control assembly includes a limiting member. The limiting member abuts against a side wall of the upper push rod and has a position-limiting state for limiting movement of the upper push rod relative to the lower push rod. The telescopic control assembly includes an operating member capable of pressing against the limiting member, and an operating member for controlling the movement of the operating member. The operating member defines a first position and a second position. In the first position, the operating member keeps the limiting member in the limiting state. In the second position, the operating member allows the limiting member to be released from the position-limiting state.

Classes IPC  ?

• A01D 34/00 - FaucheusesAppareils de fauchage des moissonneuses
• A01D 75/18 - Dispositifs de sécurité pour certaines parties des machines

Abrégé

Disclosed in the present invention are a compensation system and method for a zero-crossing voltage of back electromotive force of a brushless direct current motor. First, a bus current threshold is preset in a voltage compensation module to divide a voltage compensation reference; second, the voltage compensation module compares a bus current value with the bus current threshold to determine whether the bus current value exceeds the bus current threshold; then the voltage compensation module outputs a corresponding voltage compensation signal according to a comparison result of the bus current value and the bus current threshold; and finally, a controller compensates for a zero-crossing voltage of back electromotive force of a brushless direct current motor according to the voltage compensation signal. That is, the determination reference of the zero-crossing voltage of the back electromotive force is improved to compensate for the step-down offset of the zero-crossing voltage of the back electromotive force caused by overlarge bus current, thereby improving the commutation precision of the brushless direct current motor.

Classes IPC  ?

• H02P 6/182 - Dispositions de circuits pour détecter la position sans éléments séparés pour détecter la position utilisant la force contre-électromotrice dans les enroulements

Abrégé

Disclosed in the present invention is an electric tool. The electric tool comprises: a housing, which extends in a longitudinal direction; and a fan, an electric motor and a circuit board, which are accommodated inside the housing, wherein the housing is provided with an air outlet, a first air inlet and a second air inlet, the first air inlet being adjacent to the electric motor, the second air inlet being adjacent to the circuit board, and the first air inlet being located between the air outlet and the second air inlet. The electric tool comprises a first heat dissipation air path, passing through the electric motor, and a second heat dissipation air path, passing through the circuit board, which are formed by means of rotation of the fan. In the electric tool of the present invention, the electric motor and the circuit board are respectively cooled, such that the cooling efficiency is improved, and mutual interference of temperature rise therebetween is reduced; the first air inlet adjacent to the electric motor is located between the second air inlet adjacent to the circuit board and the air outlet used for discharging airflow to the outside, such that the circuit board is prevented from being affected by the temperature rise of airflow flowing through the electric motor, thus the circuit board is further protected; and the path of the first heat dissipation air path is relatively short, thereby strengthening the heat dissipation effect on the electric motor.

Classes IPC  ?

• B24B 23/02 - Machines de meulage portatives, p. ex. à guidage manuelAccessoires à cet effet comportant des outils de meulage rotatifsAccessoires à cet effet
• H02K 5/20 - Enveloppes ou enceintes caractérisées par leur configuration, leur forme ou leur construction avec des canaux ou des conduits pour la circulation d'un agent de refroidissement
• B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs

Abrégé

maxminmaxminmin, determining a current sudden change point. In the method, only the latest N current sampling values are stored in the storage queue, and the maximum value and the minimum value are compared so as to determine the current sudden change point; thus, current measurement can be achieved by using an existing chip, thereby improving the efficiency of current measurement and the accuracy of recognizing the current sudden change point.

Classes IPC  ?

• G01R 19/00 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe

Abrégé

A power pool, includes a housing, defining an air inlet and a heat-dissipation vent; a motor comprising a front end and a rear end; a heat-dissipation fan, mounted at the rear end of the motor and capable of being driven by the motor to rotate and generate a negative pressure, wherein a motor heat-dissipation passage; a control board, arranged in the receiving space and located at a rear side of the motor, and configured to control an operation of the motor; wherein the housing is provided with a partition extending from an inner wall into the receiving space, the partition is located between the motor and the control board to enable the control board independent of the motor heat-dissipation passage, the partition separates the heat-dissipation vent into a first heat-dissipation vent and a second heat-dissipation vent, and a ventilation hole facing the heat-dissipation fan is defined in the partition.

Classes IPC  ?

• A01D 34/90 - FaucheusesAppareils de fauchage des moissonneuses spécialement adaptés à des usages particuliers destinés à être portés par l'opérateur
• A01D 69/02 - Mécanismes d'entraînement ou éléments de ceux-ci pour moissonneuses ou faucheuses électriques
• B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs

Abrégé

A garden tool includes an upper push rod, a lower push rod and a control mechanism connected to the upper push rod and the lower push rod. The control mechanism includes a safety switch, an expansion-retraction locking assembly and an operation handle, a trigger configured to trigger the safety switch. The expansion-retraction locking assembly includes a limiting member capable of being operated to enter between the upper push rod and the lower push rod to limit an expansion and retraction of the upper push rod relative to the lower push rod, and a stopping member for holding the limiting member in the limiting state. The operating handle is configured to rotate around a pivot shaft between a first position and a second position. The trigger member and the stopping member are connected to the pivot shaft and driven by the operating handle.

Classes IPC  ?

• A01D 34/68 - FaucheusesAppareils de fauchage des moissonneuses caractérisés par des particularités relatives au type d'appareil de coupe comportant des couteaux rotatifs comportant des couteaux tournant autour d'un axe vertical dirigés à la main par un opérateur à pied à couteaux ou à roues entraînés par un moteur
• A01D 34/82 - Autres détails

Abrégé

Disclosed are a motor control circuit and a control method. The control circuit includes: a power supply; a drive circuit; a pulse width modulation (PWM) signal generation circuit; a controller; and a reverse electromotive force detection circuit. The power supply is connected to the motor through the drive circuit; the drive circuit is connected to the controller through the PWM signal generation circuit; the controller is configured to control the drive circuit by changing a PWM signal frequency; the controller is connected to the motor through the reverse electromotive force detection circuit to obtain a reverse electromotive force parameter; the controller stores a correspondence between the reverse electromotive force parameter and the PWM signal frequency; the controller is further configured to receive the reverse electromotive force parameter and send the PWM signal frequency corresponding to the reverse electromotive force parameter to the drive circuit, for driving the motor.

Classes IPC  ?

• H02P 27/08 - Dispositions ou procédés pour la commande de moteurs à courant alternatif caractérisés par le type de tension d'alimentation utilisant une tension d’alimentation à fréquence variable, p. ex. tension d’alimentation d’onduleurs ou de convertisseurs utilisant des convertisseurs de courant continu en courant alternatif ou des onduleurs avec modulation de largeur d'impulsions
• H02P 6/08 - Dispositions pour commander la vitesse ou le couple d'un seul moteur
• H02P 6/182 - Dispositions de circuits pour détecter la position sans éléments séparés pour détecter la position utilisant la force contre-électromotrice dans les enroulements

Abrégé

The present application relates to a hedge trimmer. A rear machine body can rotate relative to a front machine body. The rear machine body includes a rotary unlocking trigger and a microswitch disposed on one side of the rotary unlocking trigger. The microswitch is a normally closed switch and is electrically connected to a power supply circuit. The rotary unlocking trigger has a first position and a second position relative to the front machine body. In response to the rotary unlocking trigger is at the first position, the rear machine body is fixed relative to the front machine body, and the power supply circuit is conducted; in response to the rotary unlocking trigger is at the second position, the rear machine body rotates relative to the front machine body, and the power supply circuit is disconnected.

Classes IPC  ?

• A01G 3/08 - Autres outils à élaguer, émonder ou ébrancher des arbres sur pied

Abrégé

An electric tool, comprising: a housing (1), wherein the housing (1) is provided with an air inlet (11) and a heat dissipation port (13); an electric motor (2), which comprises a front end and a rear end; a heat dissipation fan (21), which is mounted at the rear end of the electric motor (2) and is driven by the electric motor (2) to rotate so as to generate a negative pressure, an accommodating space being internally provided with an electric-motor heat dissipation channel, in which an airflow flows from the air inlet (11) to the heat dissipation port (13); and a control board (3), which is arranged in the accommodating space and located behind the electric motor (2), and is configured to control the operation of the electric motor (2), wherein the housing (1) is provided with a partition plate (15) having an inner wall extending into the accommodating space; the partition plate (15) is located between the electric motor (2) and the control board (3), so that the control board (3) is separate from the electric-motor heat dissipation channel; the partition plate (15) divides the heat dissipation port (13) into a first heat dissipation port (131) close to the electric motor (2), and a second heat dissipation port (133) close to the control board (3); the partition plate (15) is provided with a ventilation hole (151) facing the heat dissipation fan (21); the second heat dissipation port (133), the ventilation hole (151) and the first heat dissipation port (131) form a control-board heat dissipation channel; and the control board (3) is located in the control-board heat dissipation channel.

Classes IPC  ?

• A01D 34/416 - FaucheusesAppareils de fauchage des moissonneuses caractérisés par des particularités relatives au type d'appareil de coupe comportant des couteaux rotatifs sous forme de fils flexibles
• A01D 34/78 - Mécanismes d'entraînement des couteaux électriques
• A01D 34/81 - CartersBoîtiers
• A01D 34/82 - Autres détails
• H02K 9/06 - Dispositions de refroidissement ou de ventilation par l'air ambiant s'écoulant à travers la machine comportant des moyens pour établir la circulation d'un agent de refroidissement avec des ventilateurs ou des dispositifs d'entraînement mûs par l'arbre de la machine

Abrégé

Disclosed in the present invention are an electric tool and a control method. The electric tool comprises a driving unit and a control unit, wherein the control unit is connected to a mode selection apparatus, a parameter measurement unit and a rotation speed measurement unit, the mode selection apparatus being at least provided with a fastener withdrawing gear. The control unit pre-stores a predetermined parameter and a preset rotation speed for the operation of an electric motor; under the fastener withdrawing gear, the parameter measurement unit measures a parameter for the operation of the electric motor, and compares the parameter for the operation of the electric motor with the predetermined parameter; and if the parameter for the operation of the electric motor is continuously less than the predetermined parameter within a first predetermined time, the control unit outputs a slow braking signal having a duty ratio of less than 100% to the driving unit, so as to control the electric motor to slowly brake and continue for a second predetermined time, and the control unit receives a rotation speed of the electric motor that is measured by the rotation speed measurement unit and controls the electric motor to maintain the preset rotation speed. In the patent of the present invention, when the electric motor is at the fastener withdrawing gear, the rotation speed of the electric motor is maintained at the preset rotation speed by means of slow braking, such that a user can control, according to actual situations, the electric motor to shut down.

Classes IPC  ?

• H02P 3/18 - Dispositions pour l'arrêt ou le ralentissement de moteurs, génératrices électriques ou de convertisseurs dynamo-électriques pour arrêter ou ralentir individuellement un moteur dynamo-électrique ou un convertisseur dynamo-électrique pour arrêter ou ralentir un moteur à courant alternatif
• H02P 23/24 - Commande de la direction, p. ex. dans le sens des aiguilles d’une montre ou dans le sens inverse des aiguilles d’une montre
• H02K 11/33 - Circuits d’entraînement, p. ex. circuits électroniques de puissance
• H02K 11/20 - Association structurelle de machines dynamo-électriques à des organes électriques ou à des dispositifs de blindage, de surveillance ou de protection pour la mesure, la surveillance, les tests, la protection ou la coupure
• H02K 11/21 - Dispositifs pour détecter la vitesse ou la position, ou actionnés par des valeurs de ces variables
• H02K 11/27 - Dispositifs pour détecter le courant ou actionnés par des valeurs de cette variable
• B25B 21/00 - Outils portatifs à moteur pour serrer ou desserrer les vis ou les écrousAccessoires pour appareils à percer ayant les mêmes buts
• B25B 19/00 - Clés ou tournevis opérant par choc

Abrégé

The present invention relates to a torque control method and device. The method comprises: verifying the validity by using a first torque value Tset set by a user, a second torque value Ti acquired according to parameters, and a third torque value Ts uploaded by a torque sensor; and controlling an electric motor according to the validity of the torque. In the present invention, whether the torque values are normal and valid is determined by means of comparing the torque values obtained in a plurality of ways, thereby greatly improving the accuracy of the torque, and improving the effect of control over an electric motor. The solution provided in the present invention involves a simple processing process, and has relatively low requirements for the processing capability of a device, such that torque verification can be performed without increasing the processing capability of the device, thereby reducing the costs and improving the user experience.

Classes IPC  ?

• B25B 23/147 - Agencement pour limiter le couple de blocage ou pour indiquer le couple des clés ou des tournevis spécialement adapté aux clés ou tournevis électriques
• G01L 5/00 - Appareils ou procédés pour la mesure des forces, du travail, de la puissance mécanique ou du couple, spécialement adaptés à des fins spécifiques
• H02P 29/00 - Dispositions pour la régulation ou la commande des moteurs électriques, adaptées à des moteurs à courant alternatif et à courant continu

Abrégé

The present invention relates to a motor, comprising a rotating shaft extending in the axial direction, an inner rotor fixed to the rotating shaft, an outer stator sleeved on the outer periphery of the inner rotor, a fan fixed to the rotating shaft, and an air guide cover located between the outer stator and the fan. The air guide cover comprises a first air guide ring located at the rear end in the axial direction and a second air guide ring located at the front end in the axial direction; the fan is located in the second air guide ring; the first air guide ring is arranged adjacent to the outer stator, and the first air guide ring has an inner diameter of d3; the outer stator has a first inner diameter of d1, wherein the inner diameter d3 of the first air guide ring is larger than or equal to the first inner diameter d1 of the outer stator. The heat dissipation effect is significantly improved.

Classes IPC  ?

• H02K 5/04 - Enveloppes ou enceintes caractérisées par leur configuration, leur forme ou leur construction
• H02K 9/06 - Dispositions de refroidissement ou de ventilation par l'air ambiant s'écoulant à travers la machine comportant des moyens pour établir la circulation d'un agent de refroidissement avec des ventilateurs ou des dispositifs d'entraînement mûs par l'arbre de la machine
• H02K 5/20 - Enveloppes ou enceintes caractérisées par leur configuration, leur forme ou leur construction avec des canaux ou des conduits pour la circulation d'un agent de refroidissement

Abrégé

A dust collection device, comprising: a main housing; and a suction pipe, which is arranged on the main housing and has a degree of freedom of movement relative to the main housing in a lengthwise direction of the suction pipe. The dust collection device further comprises: a first stop portion, which is configured to limit the distance the suction pipe moves toward the main housing, and is arranged on the suction pipe and has a degree of freedom of movement relative to the suction pipe in the lengthwise direction of the suction pipe; and a first operation portion, which is at least configured to limit the distance the first stop portion moves relative to the suction pipe, and is arranged on the main housing. The dust collection device provided in the present invention is more flexible to use.

Classes IPC  ?

• B25D 17/18 - Enlèvement ou dépôt de la poussière par aspiration de l'air chargé de poussière
• B28D 1/14 - Travail de la pierre ou des matériaux analogues p. ex. briques, béton, non prévu ailleursMachines, dispositifs, outils à cet effet par forage ou perçage
• B28D 7/02 - Accessoires spécialement conçus pour leur utilisation avec les machines ou les dispositifs des autres groupes de la présente sous-classe pour enlever ou faire se déposer la poussière p. ex. par pulvérisation de liquidesAccessoires spécialement conçus pour leur utilisation avec les machines ou les dispositifs des autres groupes de la présente sous-classe pour refroidir les pièces travaillées

Abrégé

The present disclosure discloses a brushless DC motor braking system and method. during the braking process of the brushless DC motor, the busbar voltage value is controlled to always be between the high threshold of the busbar voltage and low threshold of the busbar voltage through the brake control module; and different PWM modulation signals are used to control the brushless DC motor 4 to perform slow braking until stopping based on different busbar voltage states. Thus, in the present disclosure, the method not only ensures that the busbar voltage value continues to be maintained between the high threshold of the busbar voltage and low threshold of the busbar voltage, thereby protecting electronic components and circuits and extending their service life; but also avoids the hard braking method of direct conduction of the three lower transistors of the three-phase inverter in related arts.

Classes IPC  ?

• H02P 3/20 - Dispositions pour l'arrêt ou le ralentissement de moteurs, génératrices électriques ou de convertisseurs dynamo-électriques pour arrêter ou ralentir individuellement un moteur dynamo-électrique ou un convertisseur dynamo-électrique pour arrêter ou ralentir un moteur à courant alternatif par inversion de l'ordre dans lequel les phases sont reliées au moteur

Abrégé

Disclosed in the present invention are a braking system and method for a brushless direct current motor. In the braking process of a brushless direct current motor, a bus voltage value is controlled by means of a braking control module to be always between a high bus voltage threshold and a low bus voltage threshold, and according to different bus voltage states, different pwm modulation signals are used so as to control the brushless direct current motor to perform slow braking till the brushless direct current motor is shut down. In view of the above, according to the present invention, the bus voltage value is ensured to be continuously maintained between the high bus voltage threshold and the low bus voltage threshold, an electronic component and a circuit are protected, and the service life of the electronic component and the service life of the circuit are prolonged; moreover, a hard braking method of direct turning-on of three lower tubes of a three-phase inverter in the prior art is avoided, and the braking hand feeling of the brushless direct current motor is remarkably improved.

Classes IPC  ?

• H02P 6/24 - Dispositions pour l'arrêt

Abrégé

An air blowing device, including an air duct portion, a motor assembly arranged inside the air duct portion, a fan assembly driven by the motor assembly, a mounting portion connected to a rear end of the air duct portion, and a connecting portion connecting the air duct portion with the mounting portion. The mounting portion and the air duct portion are spaced apart from each other and cooperatively define an opening space. The air blowing device further includes an air filter that is received in and completely fills the opening space to prevent foreign particles from entering an interior of the air duct portion, without sacrificing the amount of air intaken into the air blowing device, and thus the service life of the air blowing device may be extended. Due to a detachable structure, the air filter can be conveniently removed and cleaned after being used for a long time.

Classes IPC  ?

• A01G 20/47 - Dispositifs aspirants ou soufflants
• F04D 29/70 - Grilles d'aspirationFiltresSéparateurs de poussièreNettoyage

Abrégé

Disclosed in the present invention are an electric-motor control circuit and a control method. The electric-motor control circuit comprises: a power source, a drive circuit, a PWM signal generation circuit, a controller, and a back electromotive force measurement circuit, wherein the power source is connected to an electric motor by means of the drive circuit; the drive circuit is connected to the controller by means of the PWM signal generation circuit; and the controller controls the drive circuit by means of changing the frequency of a PWM signal, the controller is connected to the electric motor by means of the back electromotive force measurement circuit, so as to acquire a back electromotive force parameter, the controller stores correlations between back electromotive force parameters and frequencies of PWM signals, and the controller receives the back electromotive force parameter and sends a corresponding PWM signal to the drive circuit, so as to drive the electric motor. In the present invention, a parameter of an electric motor is directly acquired, so as to change a signal which is used for driving the electric motor, such that the normal operation of the electric motor under high speed and a heavy load can be met, and high accuracy and low power consumption are achieved.

Classes IPC  ?

• H02P 6/182 - Dispositions de circuits pour détecter la position sans éléments séparés pour détecter la position utilisant la force contre-électromotrice dans les enroulements
• H02P 6/08 - Dispositions pour commander la vitesse ou le couple d'un seul moteur
• H02P 27/08 - Dispositions ou procédés pour la commande de moteurs à courant alternatif caractérisés par le type de tension d'alimentation utilisant une tension d’alimentation à fréquence variable, p. ex. tension d’alimentation d’onduleurs ou de convertisseurs utilisant des convertisseurs de courant continu en courant alternatif ou des onduleurs avec modulation de largeur d'impulsions

Abrégé

An electric tool, comprising a housing, a motor located in the housing, a transmission mechanism driven by the motor, and a working head connected to the transmission mechanism. The motor drives the transmission mechanism to drive the working head to move; the motor comprises a motor shaft extending in an axial direction, a rotor fixedly connected to the motor shaft, and a stator located between the motor shaft and the rotor, wherein the rotor is provided with a rotor body in the form of a cylindrical cover, the stator is fixed relative to the housing and comprises a cavity for the motor shaft to pass through, and the stator is at least partially accommodated in the rotor body in the axial direction; the motor further comprises a first bearing sleeved on the motor shaft; and the first bearing is located in the cavity in the axial direction and supports the motor shaft in the housing. The motor is an external rotor motor and by means of the characteristic that the stator is hollow, a second bearing supporting the motor shaft is placed in the cavity of the stator, so that the space occupied by the second bearing in the axial direction of the motor is reduced, thereby reducing the size of the electric tool in the axial direction of the motor.

Classes IPC  ?

• B25B 21/02 - Outils portatifs à moteur pour serrer ou desserrer les vis ou les écrousAccessoires pour appareils à percer ayant les mêmes buts avec des moyens pour communiquer un choc à la tige du tournevis ou à la douille de la clé à écrou
• B25B 23/00 - Parties constitutives ou accessoires des clés à écrous, clés anglaises, tournevis
• H02K 5/16 - Moyens de support des paliers, p. ex. supports isolants ou moyens pour ajuster les paliers dans leurs flasques
• H02K 1/27 - Noyaux rotoriques à aimants permanents

Abrégé

A blowing device (100), comprising an air duct part (1), a motor assembly (2) mounted in the air duct part (1), a fan assembly (3) driven by the motor assembly (2), a mounting part (4) connected to the rear end of the air duct part (1), and a connecting part (9) connecting the air duct part (1) to the mounting part (4). The mounting part (4) and the air duct part (1) are spaced apart to form an opening (200). The connecting part (9) comprises a first connecting part (91) provided at the top and a second connecting part (92) provided at the bottom. The opening (200) is defined by the first connecting part (91), the second connecting part (92), the air duct part (1), and the mounting part (4). The blowing device (100) further comprises a fan cover (5) fixed between the mounting part (4) and the air duct part (1). The fan cover (5) fills and blocks the opening (200). By providing the fan cover (5) in the opening (200), foreign matters are effectively prevented from entering the air duct part while ensuring the air inlet volume, and the service life of the blowing device is prolonged. The fan cover is an independent component, and after the fan cover is used for a long time, a user can conveniently disassemble the fan cover and clean the fan cover.

Classes IPC  ?

• E01H 1/08 - Emploi de l'air comprimé pour détacher ou enlever les matières indésirablesSéchage par la chaleur uniquement, ou par des courants de gazNettoyage par projection de particules abrasives

Abrégé

A ratchet wrench, comprising: a housing extending in an axial direction, an electric motor located inside the housing, a transmission mechanism driven by means of the electric motor, and a driving mechanism connected to the transmission mechanism. The electric motor drives the driving mechanism to operate by means of the transmission mechanism. The housing comprises a base, which is used for accommodating the electric motor, and a head housing part, which is connected to the axial front end of the base, wherein the transmission mechanism and the driving mechanism are accommodated in the head housing part. The base and the head housing part are made of different materials, and the base has a specific heat capacity larger than the specific heat capacity of the head housing part, such that the thermal conductivity of the base is better than the thermal conductivity of the head housing part, thereby solving the problem of heat generation of the electric motor. The head housing part is fixedly connected to the front end of the base by means of a bolt, such that the head housing part is reliably fixed to the base without loosening.

Classes IPC  ?

• B25B 13/46 - Clés à écrousClés anglaises du type à cliquet, assurant le libre retour de la course de la poignée
• B25B 23/00 - Parties constitutives ou accessoires des clés à écrous, clés anglaises, tournevis
• B25F 5/02 - Structure des boîtiers, corps ou poignées

Abrégé

For a system of adjusting a speed of an electric tool, a power supply module is connected to an inverter, the inverter is connected to a motor and a controller; the controller is connected to a switch fixed-speed module, a rotational speed display module, and a fixed-speed prompting module. The switch fixed-speed module comprises a switch trigger connected to the controller and is configured to set a target operating speed of the motor based on the amount of turned-on stroke of the switch trigger. The rotational speed displaying module is configured to display a preset operating speed of the motor. The fixed-speed prompting module is configured to prompt a setting state of the target operating speed.

Classes IPC  ?

• B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs
• H02K 7/14 - Association structurelle à des charges mécaniques, p. ex. à des machines-outils portatives ou des ventilateurs
• H02P 6/08 - Dispositions pour commander la vitesse ou le couple d'un seul moteur

Abrégé

The present invention relates to an electric tool and to a control method thereof. The electric tool comprises: a driving assembly, a first output part, a second output part, a switching assembly operated by a user, an identification unit, a control unit and a first control assembly triggered by a user; the switching assembly switches one of the first output part and the second output part to be connected with the driving assembly, and the identification assembly identifies the operating mode of the electric tool; when in a first operating mode, the control unit controls the first control assembly to be in an effective state, and the control unit controls the operating state of the first output part according to a signal inputted by the first control assembly; and when in a second operating mode, the control unit controls the first control assembly to be in an ineffective state. The electric tool of the present invention has the technical effects of having multiple operating modes free of mutual interference, stable performance and high safety.

Classes IPC  ?

• B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs

Abrégé

A clutch and an electric hammer. The clutch comprises: a clutch sleeve, provided with a first clamping portion; clutch discs, arranged in the clutch sleeve; a clamping element, arranged at an end portion of the clutch sleeve; and a biasing element, arranged in the clutch sleeve. The clutch discs and the clutch sleeve are buckled with each other to rotate together or are released from each other; during releasing, the biasing element is deformed, and clamping teeth are separated from grooves, so that the clutch discs are separated from the clutch sleeve. According to the clutch, the whole clutch can be assembled, operated or disassembled without other parts, thereby reducing the number of parts in the corresponding electric hammer, simplifying the production and assembly process of the clutch and the electric hammer, and reducing the cost; and the electric hammer is convenient to disassemble and assemble, so that the parts that relatively slide are reduced, and the connection is more stable.

Classes IPC  ?

• B23B 45/16 - Perceuses tenues à la main ou perceuses analogues portatives, p. ex. en forme de pistoletÉquipement à cet effet avec une action de percussion superposée

Abrégé

Disclosed in the present invention is a speed regulation system of a power tool. A power module of the speed regulation system is connected to an inverter, the inverter is electrically connected to a controller and a motor, and the controller is electrically connected to a switch constant speed module, a rotating speed display module, and a constant speed prompt module. The switch constant speed module comprises a switch trigger electrically connected to the controller and sets a target running speed of the motor according to a turn-on stroke amount of the switch trigger. The rotating speed display module is used for displaying a preset running speed of the motor. The constant speed prompt module is used for prompting a set state of the target running speed. According to the present invention, an intelligent constant speed mode is added to the power tool, the target running speed is set by means of cooperation of the switch constant speed module, the rotating speed display module, and the constant speed prompt module, which is convenient and fast, the actual requirements for rotation of the power tool within a specific time at a specific running speed can be met, the switch trigger does not need to be continuously pressed, the labor intensity of an operator is greatly reduced, and the working efficiency is improved.

Classes IPC  ?

• H02P 27/06 - Dispositions ou procédés pour la commande de moteurs à courant alternatif caractérisés par le type de tension d'alimentation utilisant une tension d’alimentation à fréquence variable, p. ex. tension d’alimentation d’onduleurs ou de convertisseurs utilisant des convertisseurs de courant continu en courant alternatif ou des onduleurs

Abrégé

A battery pack, including a housing and at least one battery assembly disposed within the housing; wherein each battery assembly includes a plurality of cells and a cell bracket connected to longitudinal ends of the plurality of cells; wherein along a longitudinal view, the plurality of cells are divided into at least two single-row cell sets, and axes of cells in each single-row cell set are on a same arc of a circular arc; axes of two adjacent cells in one of the at least two single-row cell sets are in a triangular shape with an axis of a corresponding cell in another of the at least two single-row cell sets, the one of the at least two single-row cell sets being adjacent to the another of the at least two single-row cell sets.

Classes IPC  ?

• H01M 50/213 - Bâtis, modules ou blocs de multiples batteries ou de multiples cellules caractérisés par leur forme adaptés aux cellules ayant une section transversale courbée, p. ex. ronde ou elliptique
• H01M 10/42 - Procédés ou dispositions pour assurer le fonctionnement ou l'entretien des éléments secondaires ou des demi-éléments secondaires
• H01M 50/262 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports avec des moyens de fixation, p. ex. des serrures

Abrégé

A chain saw, arranged with a guide plate and a chain. The chain saw includes a housing, a drive assembly arranged in the housing, and a fixing assembly tensioning the chain and locking the guide plate. The fixing assembly includes a shield abutting against the guide plate, a knob arranged on an outside of the shield, a tensioning member driven by the knob, a locking member snapped to the shield, and an elastic member disposed between the knob and the locking member. A side of the shield facing the locking member is arranged with a first clamping part, and a side of the locking member facing the shield is arranged with a second clamping part; in condition of the guide plate being locked, the elastic member deforms and abuts against the locking member, causing the second clamping part to snapped to the first clamping part.

Classes IPC  ?

• B27B 17/14 - Systèmes pour tendre la chaîne
• B27B 17/02 - Scies à chaîne pourvues de guide-chaîne

Abrégé

The present invention relates to a chain saw, which is provided with a guide plate and a chain. The chain saw comprises a housing, a driving assembly arranged inside the housing, and a fixing assembly for tensioning the chain and locking the guide plate. The fixing assembly comprises a protective cover pressed against the guide plate, a knob arranged on an outer side of the protective cover, a tensioning member driven by the knob, a locking member clamped to the protective cover, and an elastic member located between the knob and the locking member, wherein a first clamping portion is arranged on the side of the protective cover facing the locking member; a second clamping portion is arranged on the side of the locking member facing the protective cover; and when the guide plate is locked, the elastic member deforms and presses against the locking member, such that the second clamping portion is clamped to the first clamping portion. In the present invention, the first clamping portion is arranged on the protective cover, the second clamping portion is arranged on the locking member, the two clamping portions are clamped to each other, and under the action of the elastic member, the locking member and the protective cover cannot easily generate relative movement, such that the guide plate is not easy to loosen.

Classes IPC  ?

• B27B 17/00 - Scies à chaîneAccessoires ad hoc
• B27B 17/14 - Systèmes pour tendre la chaîne
• B23D 57/02 - Machines à scier ou dispositifs de sciage non couverts par l'un des groupes à scies à chaîne

Abrégé

Discloses are a power tool and a clutch assembly. The power tool includes a housing; a motor; and a transmission assembly, driven by the motor and including a clutch assembly. The clutch assembly includes an intermediate shaft, and an elastic member and a clutch block that are sleeved on the intermediate shaft. A front end of the elastic member is supported on the intermediate shaft, and a rear end of the elastic member is supported on the clutch block. The clutch block includes: a gear; a friction plate; and a nut. The gear rotates relative to the friction plate and the nut, in response to a driving force of the motor for driving the gear being greater than a sum of a friction force between the gear and the friction plate and a friction force between the gear and the nut.

Classes IPC  ?

• B25F 5/00 - Détails ou parties constitutives d'outils portatifs à moteur sans relation spécifique avec les opérations exécutées et non prévus ailleurs

Abrégé

The present invention relates to a hedge trimmer. A rear body can rotate relative to a front body. The rear body comprises a rotary unlocking trigger and a micro switch disposed on one side of the rotary unlocking trigger. The micro switch is a normally closed switch and is electrically connected to a power supply circuit. The rotary unlocking trigger has a first position and a second position relative to the front body. When the rotary unlocking trigger is at the first position, the rear body is fixed relative to the front body, and the power supply circuit is turned on; when the rotary unlocking trigger is at the second position, the rear body rotates relative to the front body, and the power supply circuit is turned off. The rotary unlocking trigger controls not only the rotation of the front body and the rear body, but also the on-off switching of the power supply circuit. When the rotary unlocking trigger is in an unlocking state, even if a starting trigger is triggered, a motor still cannot be started because the power supply circuit is turned off, thereby ensuring safe use. The center of gravity of the hedge trimmer is offset, the posture of using the hedge trimmer is more stable, and thus power distribution and center of gravity control of an operator are facilitated, and the operator is not prone to fatigue.

Classes IPC  ?

• A01G 3/053 - Appareils à tailler les haies, p. ex. cisailles à haies portables entraînés par un moteur
• A01G 3/04 - Appareils à tailler les haies, p. ex. cisailles à haies

Abrégé

A sleeve assembly and an electric tool are provided. The sleeve assembly includes a sleeve defining a receiving cavity recessed backward from a first end face of the sleeve. The nut is received in the receiving cavity. The sleeve assembly also includes a pull rod assembly arranged in the receiving cavity. The pull rod assembly includes a pull rod extending along a central axis of the sleeve, a pulling component arranged at one end of the pull rod, and a bearing arranged at another end of the pull rod opposite to the pulling component. The pull rod is connected to an inner wall of the sleeve through the bearing, and the pull rod is rotatable relative to the sleeve. In response to the sleeve assembly screwing the nut, the pulling component is configured to drive the bolt to be attached to a surface of the to-be-fixed component.

Classes IPC  ?

• B25B 21/00 - Outils portatifs à moteur pour serrer ou desserrer les vis ou les écrousAccessoires pour appareils à percer ayant les mêmes buts
• B25B 23/12 - Dispositions pour manipuler les vis ou écrous pour tenir ou présenter la vis ou l'écrou avant ou pendant sa rotation par des moyens magnétiques

Abrégé

An input voltage control method includes: a power supply, a first rectifier circuit and a second rectifier circuit connected between the positive terminal and the negative terminal of the power supply. The first rectifier circuit and the second rectifier circuit are connected in parallel with each other, an output end of the first rectifier circuit is connected to the motor via a driver circuit. An output end of the second rectifier circuit is connected to a controller through a voltage detection circuit. The controller collects a bus current value and collects a bus voltage value. The controller stores a target duty cycle value and a target voltage value. The controller determines a corresponding target voltage value based on the collected bus current value and obtains an output control duty cycle to drive the motor.

Classes IPC  ?

• H02P 23/26 - Commande du facteur de puissance [PFC]
• H02P 27/08 - Dispositions ou procédés pour la commande de moteurs à courant alternatif caractérisés par le type de tension d'alimentation utilisant une tension d’alimentation à fréquence variable, p. ex. tension d’alimentation d’onduleurs ou de convertisseurs utilisant des convertisseurs de courant continu en courant alternatif ou des onduleurs avec modulation de largeur d'impulsions
• H02P 25/10 - Moteurs à collecteur, p. ex. moteurs à répulsion

Abrégé

An electric impact hammer includes an output shaft, a cylinder and a piston arranged in the cylinder. The piston defines an accommodating groove running through the rear end surface and a pair of through holes communicating with the accommodating groove and running through the outer periphery, and the front end of the output shaft is inserted in the accommodating groove, and the output shaft defines a corrugated groove on the outer periphery of the front end and a steel ball partially accommodated in the corrugated groove, the corrugated groove is connected end to end along the outer periphery of the output shaft and has an axial front end and an axial rear end; the other part of the steel ball is accommodated in the through hole, and the output shaft drives the piston to reciprocate in the axial direction by means of the steel balls.

Classes IPC  ?

• B25D 16/00 - Machines portatives à percussion avec rotation superposée
• B25D 17/06 - Piston-marteauxEnclumes
• B25D 17/24 - Amortissement de contrecoup
• B25D 11/04 - Outils portatifs à percussion entraînés par moteur électrique dans lesquels la tête de l'outil ou l'enclume est frappée par une pièce en mouvement

Abrégé

A current control method and a motor control circuit are provided. The motor control circuit includes a first rectification circuit and a second rectification circuit connected in parallel between a live wire and a natural wire of a power supply, a sampling resistor, and a controller connected to the second rectification circuit. The first rectification circuit is connected to the motor. The current control method include obtaining a periodic waveform signal of a bus voltage; collecting a bus current value through the sampling resistor; sampling the periodic waveform signal for a plurality of times; linearly fitting multiple voltage values obtained at a plurality of sampling time points to obtain multiple slopes; obtaining a power frequency according to the multiple slopes; calculating a compensation current value according to the power frequency; and generating a control signal according to the compensation current value and the bus current value.

Classes IPC  ?

• H02P 23/14 - Estimation ou adaptation des paramètres des moteurs, p. ex. constante de temps du rotor, flux, vitesse, courant ou tension
• H02P 23/00 - Dispositions ou procédés pour la commande de moteurs à courant alternatif caractérisés par un procédé de commande autre que la commande par vecteur
• H02P 25/03 - Moteurs synchrones avec excitation sans balai

Abrégé

A battery pack, comprising a housing and a battery assembly, which is located inside the housing, wherein the battery assembly comprises a plurality of battery cells and a battery cell support, which is connected to two longitudinal ends of the battery cells. When observed in a longitudinal direction, the plurality of battery cells are divided into at least two rows of battery cell groups, and axes of the battery cells in each row of a battery cell group are located on a cambered line of the same arc. Connection lines between axes of two adjacent battery cells in one row of a battery cell group and an axis of one battery cell in another row of the battery cell group are arranged to be triangular. By means of such an arrangement, battery cells in a battery pack are distributed compactly, and the overall space is rationally used, such that the structure is stable and firm. Moreover, the problems of a high temperature and a large temperature difference of inner battery cells in the existing battery cell distribution are solved, that is, the temperature difference between the battery cells is reduced, such that heat dissipation of the battery cells is uniform, thereby facilitating the balance of the battery cells in a battery pack.

Classes IPC  ?

• H01M 10/617 - Types de commande de la température pour réaliser l'uniformité ou une répartition désirée de la température
• H01M 10/613 - Refroidissement ou maintien du froid
• H01M 50/213 - Bâtis, modules ou blocs de multiples batteries ou de multiples cellules caractérisés par leur forme adaptés aux cellules ayant une section transversale courbée, p. ex. ronde ou elliptique

Abrégé

A garden tool, comprising an upper push rod, a lower push rod and a control mechanism connected to the upper push rod and the lower push rod. The control mechanism comprises a safety switch, a telescopic locking assembly and an operation handle, and further comprises a trigger for triggering the safety switch. The telescopic locking assembly comprises a limiting member capable of being operated to enter between the upper push rod and the lower push rod, so as to limit the movement of the upper push rod relative to the lower push rod, and a stopping member for holding the limiting member in the limiting state. The operating handle can rotate about a pivot shaft between a first position and a second position. The trigger member and the stopping member are both connected to the pivot shaft and driven by the operating handle. When the operating handle is in the first position, the stopping member abuts against the limiting member, so that the upper push rod and the lower push rod are relatively fixed, the trigger member does not trigger the safety switch, and the garden tool is allowed to be started. When the operating handle is in the second position, the safety switch is triggered, and meanwhile, the stopping member is separated from the limiting member, the upper push rod is movably connected to the lower push rod, and the garden tool is limited from being started.

Classes IPC  ?

• A01D 75/18 - Dispositifs de sécurité pour certaines parties des machines

Abrégé

A push rod mechanism (1), comprising a lower push rod (11) and an upper push rod (12) that are relatively telescopic, and a telescopic control assembly (8) sleeved on the joint of the lower push rod (11) and the upper push rod (12). The lower push rod (11) is provided with a through hole penetrating through a side wall. The telescopic control assembly (8) comprises a limiting member at least partially accommodated in the through hole. The limiting member abuts against a side wall of the upper push rod (12) and has a limiting state for limiting the telescopic movement of the upper push rod (12) relative to the lower push rod (11). The telescopic control assembly (8) further comprises an operating member capable of pressing against the limiting member, and an operating handle (14) for controlling the movement of the operating member. The operating handle (14) has a first position and a second position, and is capable of moving between the first position and the second position. When the operating handle (14) is in the first position, the operating member presses against the limiting member to keep the limiting member in the limiting state. When the operating handle (14) is in the second position, the operating member recedes from the limiting member to allow the limiting member to be released from the limiting state.

Classes IPC  ?

• A01D 67/00 - Châssis ou caisses spécialement adaptés aux moissonneuses ou aux faucheusesMécanismes de réglage de la caissePlates-formes
• A01D 34/00 - FaucheusesAppareils de fauchage des moissonneuses

Abrégé

A sleeve assembly (100) and an electric tool (200). The sleeve assembly (100) is used to screw a nut (310) to a bolt (320) that is located on a workpiece (300) to be fixed, and the sleeve assembly comprises a sleeve (10) and an accommodating cavity (11) recessed backwards from a front end of the sleeve (10), wherein the nut (310) is accommodated in the accommodating cavity (11). The sleeve assembly (100) further comprises a pull rod assembly (20) located in the accommodating cavity (11); the pull rod assembly (20) comprises a pull rod (21) extending in an axial direction, a magnetic element (22) located at a front end of the pull rod (21), and a bearing (23) located at a rear end of the pull rod (21); and the pull rod (21) is connected to an inner wall of the sleeve (10) by means of the bearing (23), such that the pull rod (21) rotates relative to the sleeve (10). When the sleeve assembly (100) screws the nut (310), the magnetic element (22) attracts the bolt (320), and the sleeve assembly (100) applies an acting force to the bolt (320), such that the bolt (320) abuts against the surface of the workpiece (300) to be fixed, that is, the bolt (320) cannot move relative to the workpiece (300) to be fixed.

Classes IPC  ?

• B25B 21/00 - Outils portatifs à moteur pour serrer ou desserrer les vis ou les écrousAccessoires pour appareils à percer ayant les mêmes buts
• B25B 23/08 - Dispositions pour manipuler les vis ou écrous pour tenir ou présenter la vis ou l'écrou avant ou pendant sa rotation

Abrégé

Disclosed in the present invention is a current control method, comprising: a power supply, a first rectifying circuit and a second rectifying circuit connected in parallel between positive and negative electrodes of the power supply, an output end of the second rectifying circuit being connected to a controller via a voltage detection circuit; the controller obtains a periodic waveform signal of a bus voltage, samples the periodic waveform signal multiple times, performs linear fitting on a voltage value u obtained at a sampling time t to obtain a slope k, and obtains a power supply frequency f according to the slope k; the controller calculates a compensation current value according to the power supply frequency f; and the controller generates a control signal according to the compensation current value and a bus current value, so as to control a motor. The present invention, by means of collecting an output voltage of the second rectifying circuit and changing a compensation current value in real time according to a waveform, can accurately correct a bus current so that output power is stable.

Classes IPC  ?

• H02P 6/28 - Dispositions pour la commande du courant
• H02P 23/00 - Dispositions ou procédés pour la commande de moteurs à courant alternatif caractérisés par un procédé de commande autre que la commande par vecteur

Abrégé

actualtargettargettargetactualtargettargetactualactualactual so as to drive the motor. In the present invention, a second rectifier circuit output voltage is collected, a waveform is stable, control effects are good, and a duty cycle is changed according to a bus voltage, improving stable operation of a motor.

Classes IPC  ?

• H02P 6/00 - Dispositions pour commander les moteurs synchrones ou les autres moteurs dynamo-électriques utilisant des commutateurs électroniques en fonction de la position du rotorCommutateurs électroniques à cet effet
• H02P 27/02 - Dispositions ou procédés pour la commande de moteurs à courant alternatif caractérisés par le type de tension d'alimentation utilisant une tension d’alimentation à fréquence constante et à amplitude variable

Abrégé

An electric impact hammer (100), comprising an output shaft (511), an air cylinder (531) and a piston (21) located inside the air cylinder (531), wherein the air cylinder (531) drives the piston (21) to rotate together; the piston (21) is provided with an accommodating groove penetrating the rear end surface thereof and a pair of through holes which are in communication with the accommodating groove and penetrate the periphery thereof; the front end of the output shaft (511) is inserted into the accommodating groove, and the output shaft (511) is provided with a wave-shaped groove (511c) located in the periphery of the front end, and steel balls (21a) accommodated in the wave-shaped groove (511c); the wave-shaped groove (511c) is connected end to end along the periphery of the output shaft (511), and is provided with an axial front end and an axial rear end; and the other parts of the steel balls (21a) are accommodated in the through holes, and the output shaft (511) drives the piston (21) to reciprocate in the axial direction by means of the steel balls (21a).

Classes IPC  ?

• B25D 16/00 - Machines portatives à percussion avec rotation superposée
• B25D 17/00 - Parties constitutives ou accessoires d'outils portatifs à percussion actionnés mécaniquement
• B25D 17/02 - Têtes d'outil à percussion
• B25D 17/24 - Amortissement de contrecoup

Abrégé

An electric tool (100), comprising a housing (10), a motor (2) located in the housing (10), and a clutch assembly (31) driven by the motor (2). The clutch assembly (31) comprises an intermediate shaft (311) and an elastic member (313) and a clutch block sleeved on the intermediate shaft (311), one end of the elastic member (313) is supported on the intermediate shaft (311), and the other end is supported on the clutch block. The clutch block comprises a friction plate (315), a nut (314) and a gear (312); the motor (2) drives the gear (312) to rotate; one end of the nut (314) is supported on one side of the gear (312), the other end passes through the gear (312) and is clamped to the friction plate (315), and the nut (314) is threadedly connected to the intermediate shaft (311) and drives the friction plate (315) to extrude on the elastic member (313).

Classes IPC  ?

• F16D 7/02 - Accouplements à glissement, p. ex. glissant en cas de surcharge, pour absorber les chocs du type à friction