A working vehicle is provided that effectively uses a space in an equipment housing chamber. The working vehicle includes: a hydraulic pump; an electric motor for driving the hydraulic pump; and an equipment housing chamber that houses the hydraulic pump and the electric motor. An output shaft of the electric motor is connected to an input shaft of the hydraulic pump. The electric motor is disposed either in an upward direction or in a downward direction with respect to the hydraulic pump.
E02F 9/08 - SuperstructuresSupports for superstructures
B60L 1/00 - Supplying electric power to auxiliary equipment of electrically-propelled vehicles
B60L 15/00 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train
Provided is a working vehicle that can effectively cool cooled devices without compressing the small device housing space and, at the same time, can contribute to the reduction of the cost. A working vehicle includes: a work equipment that is operated by a pressurized oil that a hydraulic pump discharges; and an upper slew body where, in a device housing space formed in the upper slew body, a plurality of equipment that includes a hydraulic pump and an electric motor that drives the hydraulic pump are housed. In the plurality of equipment, cooled devices (an on-board charger, the electric motor, an inverter, an oil cooler) and one cooling fan for cooling the cooled devices exist. The cooled devices are arranged along a cooling air flow path through which cooling air that is generated by the cooling fan flows.
E02F 9/08 - SuperstructuresSupports for superstructures
B60L 50/60 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
B60L 53/20 - Methods of charging batteries, specially adapted for electric vehiclesCharging stations or on-board charging equipment thereforExchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
B60L 58/26 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
Provided is a working vehicle in which an angle in a vertical direction of a display screen can be adjusted to an angle that allows an operator to easily watch the display screen. The working vehicle includes: a display device; a lateral pipe that allows a wire harness connected to the display device to pass through the lateral pipe, and is disposed in front of an operator seat, a fixing portion that includes a clamp mechanism that fixes the display device to the lateral pipe, and a waterproof grommet that engages with a wire harness inserting opening of the lateral pipe by fitting engagement. The display device can be rotated by using the lateral pipe as a rotary shaft by loosening fastening of the lateral pipe by the clamp mechanism. The display device can be fixed at a desired angle by the clamp mechanism.
Provided is a working vehicle that includes a power source socket that can prevent the arrangement of a plug and a wiring that are connected to a power source socket at a place where an operator gets on or off the working vehicle and a place where a machine operation is performed. A working vehicle includes: a bracket disposed on a side of an operator seat; and a power source socket that is supported on the bracket. An insertion port of the power source socket Is disposed so as to be directed toward a rear side of the working vehicle.
A working vehicle is provided that can easily perform a mounting and detaching operation of a battery therein. A working vehicle includes: a body frame; and a counterweight that is mounted on a vehicle rear portion of the body frame. The counterweight is mounted on the body frame by a plurality of fixing bolts that threadedly engage with the counterweight by way of the body frame from a lower surface side of the body frame.
Provided is a battery pack that is used in a working vehicle where an operator can easily get access to an electric component housing chamber in which an electric component is housed thus enhancing the maintenance property of the electric component. The battery pack includes a battery module, electric components, and a housing that houses the battery module and the electric components. The housing includes an electric component housing chamber that houses the electric components. The electric component housing chamber includes: an opening portion that enables an operator to get access to the electric component housing chamber from the outside; and a maintenance cover that is configured to be capable of closing the opening portion. The maintenance cover is mounted on the housing by a hinge.
H01M 50/249 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders specially adapted for aircraft or vehicles, e.g. cars or trains
H01M 50/271 - Lids or covers for the racks or secondary casings
H01M 50/284 - MountingsSecondary casings or framesRacks, modules or packsSuspension devicesShock absorbersTransport or carrying devicesHolders with incorporated circuit boards, e.g. printed circuit boards [PCB]
Provided is a working vehicle that reduces the number of assembling man-hours of an on-board charging power source connector, and realizes the saving of a space around an on-board charging power source connector case. The working vehicle includes: an on-board charging power source connector; and an on-board charging power source connector case on which the on-board charging power source connector is mounted, and allows the charging cable to pass therethrough. The on-board charging power source connector case is disposed on a right side end portion of a battery cover. The on-board charging power source connector case is fixed to a reinforcing plate fixed to an inner back surface of the battery cover at an on-board charging power source connector case fixing portion.
A working vehicle includes an engine, a first hydraulic pump, a second hydraulic pump, a travel unit, a working unit, an operation unit, an ECU and a vehicle-controller. The vehicle-controller transmits a control command of a standard mode to the ECU when the travel unit stopped and a first period is elapsed, with a discharge pressure from the hydraulic pump being equal to or higher than a reference value, an engine load factor being equal to or higher than a predetermined upper limit, the vehicle-controller transmits the control command of the economy mode to the ECU when a second period is elapsed, with the engine load factor being equal to or lower than a predetermined lower limit, and the vehicle-controller transmits the control command of the standard mode to the ECU when the travel unit is operated.
There is provided a working vehicle and a method for controlling a working vehicle that can improve operability when travel and work operations are repeated. A working vehicle includes: a travel unit that is operated by travel operation means and brake operation means; a working unit that is operated by hydraulic pressure; a main brake circuit that generates a braking force in keeping with an operated amount when the brake operation means is in an operated state; and an auxiliary brake circuit that generates a predetermined braking force when the travel operation means is in a non-operated state.
B60T 8/34 - Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
B60T 13/14 - Pressure supply arrangements using accumulators or reservoirs
There is provided a working vehicle capable of further improving power consumption by preventing discharging of a battery in situations where discharging is unnecessary. A main controller of a working vehicle is operable when a set time has elapsed in a state where no input operation has been performed from a time when a lock lever was raised and operations of working units via operation levers were disabled, to stop supplying of power from the battery to a first driving unit by turning off a relay via a sub-controller.
E02F 3/32 - DredgersSoil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam working downwardly and towards the machine, e.g. with backhoes
E02F 3/96 - DredgersSoil-shifting machines mechanically-driven with arrangements for alternate use of different digging elements
H02P 5/74 - Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more AC dynamo-electric motors
An operation control system includes a control device having a hydraulic pump control unit that controls a hydraulic pump based on a level that an operator selects from levels in n stages (n being an integer of 2 or more). The hydraulic pump control unit has operation distance/current value corresponding data where an operation distance of an operating lever and a current value are made to correspond to each other in a corresponding manner with each level in the levels in n stages. A current value that corresponds to an operation distance of the operating lever at a present point of time is acquired from the operation distance/current value corresponding data that corresponds to the level that the operator selects, and controls the discharge amount of a pressurized oil that the hydraulic pump discharges based on the acquired current value.
An operation control system of a working vehicle capable of maintaining an angle of a bucket at a fixed angle when the bucket is elevated and/or lowered by rotating an arm is provided. The working vehicle includes an arm and a bucket mounted on the arm. The operation control system includes a control unit and a first angle sensor that measures an angle of the bucket. The control unit adjusts an angle of the bucket such that the angle of the bucket takes a fixed angle by referencing the angle of the bucket that the first angle sensor outputs during elevating of the arm and/or during lowering of the arm.
Provided is a working vehicle operation control system that can suppress wear of a crawler. A working vehicle operation control system includes: a hydraulic pump that is driven by an engine; left and right hydraulic motors; and a hydraulic pump control unit that controls a pressurized oil discharge amount of the hydraulic pump after an engine starts, and controls a traveling operation of a working vehicle. The hydraulic pump control unit controls, in a case where one of a right-side crawler traveling speed and a left-side crawler traveling speed of the crawler is not more than a predetermined traveling reference speed and the other of the right-side crawler traveling speed and the left-side crawler traveling speed is not less than the predetermined traveling reference speed, the pressurized oil discharge amount of the hydraulic pump so as to decrease the other crawler traveling speed.
A soil-and-sand intrusion preventing structure includes: a rear door; a bumper disposed to protrude more downward and rearward than the rear door when the rear door is closed; a soil-and-sand intrusion preventing wall member that extends longer than an opening range of an opening between rear end wall portions of body frames disposed on the left and right sides of a vehicle body, and is fixed to an upper surface of the bumper; and a flexible trim mounted on a trim mounting plate disposed inside and below a peripheral edge of a rear door frame constituting the rear door, the flexible trim having a planar shape that follows a planar shape of the soil-and-sand intrusion preventing wall member, wherein the trim is brought into contact with the soil-and-sand intrusion preventing wall member over an entire length thereof when the rear door is closed.
A user management system is provided for a working vehicle that can enhance the security and, at the same time, can easily manage a working situation of a user on a working vehicle. A user management system for a working vehicle performs a user management operation including user authentication based on user information that is inputted via a display part mounted on the working vehicle. The control unit determines whether or not a user identification ID inputted via the display part and registered user identification ID registered in advance agree with each other. The control unit determines whether or not an engine start button is pushed for a predetermined time or longer in a case where the user identification ID and the registered user identification ID registered in advance agree with each other, and starts an engine when the engine start button is pushed for the predetermined time or longer.
B60R 25/04 - Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the propulsion system, e.g. engine or drive motor
B60R 25/24 - Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
A remote-control unit is provided that suppresses the generation of “shaking” in a remote-control lever when the remote-control lever is operated. The remote-control unit includes a remote-control lever, a fixed rail, a movable rail, a first support member, and a second support member. The fixed rail and the first support member are fixed to a working vehicle, the movable rail slidably engages with the fixed rail, and is configured to be movable in a direction that the fixed rail is disposed. The first support member supports the second support member by way of a first resin member at a position different from a position on the fixed rail and from a position on an extension of the fixed rail.
F16F 15/08 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using elastic means with rubber springs
G05G 1/04 - Controlling members for hand-actuation by pivoting movement, e.g. levers
17.
Structure For Preventing Intrusion Of Rainwater Into Engine Room And Working Vehicle
A structure for preventing intrusion of rainwater into an engine room includes: an air intake cover that is fixed to an engine cover having an inclined portion where a height gradually lowers from a cabin side to a rear door side; a first rainwater gutter that is disposed below an air intake opening portion of the air intake cover and extends horizontally in a vehicle width direction; a second rainwater gutter that is disposed below the first rainwater gutter, and receives rainwater that flows out from an end portion of the first rainwater gutter in the vehicle width direction and allows the rainwater to flow toward a rear door side; and a third rainwater gutter that is disposed on an inner side of an upper edge of the rear door, receives rainwater that flows out from the second rainwater gutter and discharges rainwater to the outside of an engine room.
B60K 11/08 - Air inlets for coolingShutters or blinds therefor
B60K 13/02 - Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning intake
E02F 3/34 - DredgersSoil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, e.g. dippers, buckets with bucket-arms directly pivoted on the frames of tractors or self-propelled machines
E02F 9/08 - SuperstructuresSupports for superstructures
Maintenance of components to be maintained is facilitated in a working vehicle equipped with an electric motor as a driving source of a working unit. A working vehicle 1 includes an upper slewing body, a lower traveling body, working units that is operated by hydraulic pressure, an electric motor for driving the working units, a battery pack for supplying power for driving the electric motor: a battery pack compartment for installing the battery pack: and a battery cover that is openable and covers an opening in the battery pack compartment. In the battery pack, at least a battery management unit board, a cell management unit board, a charging fuse, and a service plug are disposed as the components to be maintained at positions within a reach of a maintenance worker's hand through the opening.
The working vehicle includes a lower body, an upper body, a cab, an operation unit, a travel unit, a controller, an inertial sensor, a slewing unit, and a work unit. The controller controls a first hydraulic pump by comparing an actual traveling-operation speed per unit time in the operation unit operated by an operator with acceleration calculated based on an acceleration signal detected by the inertial sensor, and controls a second hydraulic pump by comparing a slewing-operation speed per unit time in the operation unit with angular acceleration calculated based on an angular velocity signal detected by the inertial sensor.
A working vehicle includes a control valve unit with a service actuator control valve, a first drive unit, a travel unit, a lower body, an upper body, a cab, a plurality of work units and a plurality of hydraulic traveling motors, an operation unit, a quick hitch, an attachment, a trigger-switch, a plurality of solenoid valves and a plurality of pipelines, and a controller. The controller performs control that, in a case where the controller receives the trigger signal from the trigger-switch to release the lock of the quick hitch, the pressure oil in the plurality of pipelines is returned to the hydraulic oil tank by energizing the plurality of solenoid valves with the first drive unit stopped.
A working vehicle includes a control valve unit, a first drive unit, a travel unit, a lower body, an upper body, a second drive unit, a cab, a plurality of work units and a plurality of traveling hydraulic motors, an operation unit, and a controller. The first drive unit includes a first hydraulic pump, a first electric motor. The controller performs a control of the first electric motor and the second electric motor to adjust a first rotation speed of the first electric motor and a second rotation speed of the second electric motor such that a total rotation speed of the first rotation speed and the second rotation speed matches a target rotation speed calculated from required amount of pressure oil.
An external charger is to be easily transported and securely prevented from falling during transport. A wheeled platform for external charger for transporting an external charger supplying electric power to a working vehicle driven by an electric motor includes: a pedestal where the external charger is placed; and a caster and a support pillar attached to the pedestal. The pedestal or the support pillar is provided with an engagement part which a blade of the working vehicle can be engaged with. The engagement part is configured in such a way that a movement regulating member preventing the blade from wobbling can be attached in a state where the caster is spaced apart from a ground by lifting the blade further from a state where the blade is engaged.
There is provided a working vehicle facilitating the attachment/detachment of a battery pack. A working vehicle has a vehicle body, a travel unit, a working unit working by a hydraulic pressure, and an electric motor serving as a drive source for the travel unit or the working unit; the vehicle body includes a main body frame provided in a lower portion and serving as a reinforcing member and a support member for on-board devices; the main body frame includes a large plate serving as a bottom plate; the large plate has a cutout area provided in a rear portion, facing backward in a plane view, and allowing the support section of a device loading/unloading a battery pack to abut on the cutout area, and the battery pack is disposed above the cutout area.
A vehicle body includes a main body frame including a large plate; a pair of left and right longitudinal ribs built upright on the large plate; and a cross rib built upright on the large plate, the large plate has a cutout area provided in a rear portion, the longitudinal ribs are built upright toward a backward direction along left and right edges of the cutout area to be spaced apart in a left and right direction, and the cross rib intersects the longitudinal ribs and is built upright along a front edge of the cutout area. A counterweight is fixed to rear portions of the longitudinal ribs, and the counterweight serves as a weight balance adjusting member and a cross beam of the main body frame.
A working vehicle includes a relay component and three chargers for a single-phase alternating-current power supply to supply electric power to an electric motor. Selected as the relay component and mounted to the vehicle body is a first relay component when the external power supply PS is a three-phase alternating-current power supply and the power cable Ca has an output plug PgA of a four-wire type including a ground wire, a second relay component when the external power supply PS is the three-phase alternating-current power supply and the power cable Ca has an output plug PgB of a five-wire type including the ground wire, or a third relay component when the external power supply PS is a single-phase alternating-current power supply and the power cable Ca has an output plug PgC of a three-wire type including the ground wire.
A working vehicle includes a first device chamber and a second device chamber in front and rear portions of a vehicle body and a first partition and a second partition partitioning the first device chamber and the second device chamber from surroundings inside the vehicle body, the first device chamber includes devices, e.g., a hydraulic pump, an electric motor, and an inverter, generating heat and becoming relatively high temperature or having relatively high heat resistance, the second device chamber includes devices, e.g., an on-board charger, a battery pack, a converter, and a controller, generating heat and not becoming relatively high temperature or having relatively low heat resistance, and the first device chamber and the second device chamber are separately cooled by cooling fans.
A working vehicle includes: a filler port having a resiliently deformable hose communicating with a liquid storage part, a lid mechanism mounted to an upper end of the hose to open and close the filler port, and a moving mechanism. The moving mechanism includes: a fixing part pivotably coupled to the vehicle body and having the lid mechanism or the hose; an operating part pivotably coupled to the fixing part and including a knob; and a slide support fixed to the vehicle body and including a sliding hole for slidably inserting the knob therethrough to define a sliding range, and a locking recess. The fixing part or the operating part includes a locking projection.
A fuel tank includes an upper surface portion, a bottom surface portion, and a peripheral wall portion, and a weir portion vertically arranged at the bottom surface portion and causing a fuel in a predetermined amount to stay in a predetermined position of an inner portion when a vehicle body is inclined. The peripheral wall portion includes a first wall and a second wall which is perpendicular to and continuous with one end side of the first wall. The weir portion includes a first weir, a second weir, a third weir parallel to the first weir, a fourth weir parallel to the first weir and arranged between the first weir and the third weir, and a fifth weir interconnecting the third weir and the fourth weir.
A working control device comprises a hydraulic actuator such as the boom cylinder 36, the bucket cylinder 38, the operation device 160 that is operated by an operator to drive the hydraulic actuator, a hydraulic oil supply source consisting of the electric motor M1 and the hydraulic pump P1 that delivers hydraulic oil required to drive the hydraulic actuator; and a delivery oil amount control device (the controller for controlling rotation of the electric motor) that controls an amount of oil to be delivered from the hydraulic oil supply source in response to an operation of the operation device. The delivery oil amount control device is configured to perform a supplying oil amount control to deliver from the hydraulic oil supply source a required amount of oil for the hydraulic actuator to have a working speed corresponding to the operation of the operation device.
A working vehicle includes a drive unit having inverters, AC motors, hydraulic pumps, a battery, a controller, a battery management system, a switch, an electromagnetic contactor, and a display unit, and the switch is signal-connected to the controller, a stop signal is transmitted to the controller when the switch is turned off, and the controller performs stop control in which the AC motors are operated during a term to thereby set a residual voltage to be lower than a predetermined set voltage.
A working vehicle including a work unit hydraulically driven, a hydraulic pump driven by an electric motor, a power source and a power supply circuit which supply electric power to the electric motor, and a main body supporting them, a first fixation mechanism fixing a first fixation component to the main body includes a first conductor, a first conduction member making the first conductor and the main body electrically conductive to each other, and a second conduction member making the first conductor and the first fixation component electrically conductive to each other, and is configured such that the main body and the first fixation component are electrically conductive to each other via the first conductor and the first and second conduction members and are equal in electric potential, and the main body is electrically conductive and equal in electric potential to a ground pole of the power supply circuit.
E02F 9/08 - SuperstructuresSupports for superstructures
B60Q 1/04 - Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
B60R 16/03 - Electric or fluid circuits specially adapted for vehicles and not otherwise provided forArrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric for supply of electrical power to vehicle subsystems
E02F 9/16 - Cabins, platforms, or the like for the driver
A working control device comprises an operation lever for making a boom cylinder (36), an arm cylinder (37) and others work to drive a shovel apparatus (30), and a delivered oil amount control device (a controller (150)). A working oil supply source includes a first electric motor (M1) and a first hydraulic pump (P1). When the operation lever is subjected to a single operation, a number of the motor revolution based on the lever operation is set to control the first electric motor. When the number of motor revolution is less than a necessary minimum number of revolutions, the necessary minimum number is set to control the first electric motor (M1). When the operation lever is subjected to a composite operation, a total number of motor revolutions based on the lever operations is set. When the total number is less than a necessary minimum number of revolutions, the necessary minimum number is set to control the first electric motor (M1).
An opening and closing mechanism for a vehicle body cover which is attached to and detached from a vehicle body of a working vehicle in a separable manner includes a latching portion configured to latch an upper portion of the vehicle body cover to the vehicle body, and a lock portion configured to lock a lower portion of the vehicle body cover to the vehicle body, wherein the lock portion includes a striker provided at the vehicle body cover, a hook provided at the vehicle body, the striker being engageable with and disengageable from the hook, and a lock release portion configured to release a state of the striker being engaged with and locked by the hook, and wherein the lock release portion is arranged at a position which, when directly facing an opening portion provided at the vehicle body, is not viewable inside a field of view of the opening portion and which is graspable by a worker putting a worker's hand inside from the opening portion and stretching worker's fingers from inside the field of view of the opening portion to outside the field of view of the opening portion.
E05C 3/14 - Fastening devices with bolts moving pivotally or rotatively with latching action with operating handle or equivalent member rigid with the latch
E02F 9/08 - SuperstructuresSupports for superstructures
There is provided a working vehicle with increased safety by preventing deterioration of a battery due to over-discharge of the battery caused by an operator not noticing occurrence of a malfunction in driving by connected to an external power source. The working vehicle includes a charger, the battery, a sensor, a drive unit, a controller, a display unit, a battery management system, and a switch, in which the battery management system is configured to control the working vehicle to be switched to the driving by connected to the external power source when the switch is turned on after the charger is connected to an external power source and a valid signal for driving by connected to the external power source is received.
H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
B60L 53/50 - Charging stations characterised by energy-storage or power-generation means
B60L 58/18 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
B60L 50/60 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
B60L 53/62 - Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
H01M 10/46 - Accumulators structurally combined with charging apparatus
H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
B60R 16/00 - Electric or fluid circuits specially adapted for vehicles and not otherwise provided forArrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
There is provided a working vehicle capable of simplifying a structure and reducing manufacturing costs by realizing a configuration in which a tying-down attachment point doubles as a lifting attachment point. A working vehicle according to the present invention includes tying-down attachment points for locking a tightening member for preventing reversal at the time of transportation or parking in at least the front of a vehicle body, in which the tying-down attachment points are arranged at right-and-left two places on a front end surface of the vehicle body, capable of locking a lifting member for lifting the vehicle body upward and having strength in a vertical direction enough to withstand a load applied at the time of lifting the vehicle body upward after locking the lifting member, thereby doubling as lifting attachment points.
An operation control device for a working vehicle which includes a hydraulic working device, comprises a hydraulic actuator to drive the hydraulic working device, an operating oil supply source for driving the hydraulic actuator, a sent-out oil amount control device that controls the amount of oil sent out from the operating oil supply source, an operating device to be operated to make the hydraulic actuator work, and an operating oil supply control device that performs control to supply operating oil to the hydraulic actuator according to operation of the operating device. The sent-out oil amount control device controls the amount of oil sent out from the operating oil supply source according to the operation amount of the operating device.
F15B 9/04 - Servomotors with follow-up action, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by varying the output of a pump with variable capacity
An operation control device for a working vehicle comprises a hydraulic actuator to drive the hydraulic working device, operating oil supply source for driving the hydraulic actuator, an operating oil supply control device that performs control to supply operating oil to the hydraulic actuator, an operating device to be operated to make the hydraulic actuator work and a working gain setting device that sets a gain of working speed of the hydraulic actuator corresponding to the operation of the operating device. The operating oil supply control device controls operating oil supply from the operating oil supply source to the hydraulic actuator based on the operation output signal from the operating device and the working speed gain set by the working gain setting device.
E02F 3/42 - Drives for dippers, buckets, dipper-arms or bucket-arms
E02F 3/43 - Control of dipper or bucket positionControl of sequence of drive operations
F15B 11/04 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed
F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
E02F 3/32 - DredgersSoil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam working downwardly and towards the machine, e.g. with backhoes
E02F 3/96 - DredgersSoil-shifting machines mechanically-driven with arrangements for alternate use of different digging elements
There is provided a storage apparatus for documents capable of preventing the storage apparatus from being an obstacle to getting-on/off motions and securing front visibility in good condition. A storage apparatus includes a frame having an opening and wall portions and a lid portion attached to the frame, in which an entrance of the canopy is provided on a left side or a front side of a vehicle body, the frame is fixed to a right side of the vehicle body, the lid portion has a structure in which a right end is attached to the right wall portion of the frame, a left end turns between a position of the left wall portion and a position in a lower direction of the right wall portion, and a holding portion holding the documents is provided in an inner surface.
B60R 7/04 - Stowing or holding appliances inside of vehicle primarily intended for personal property smaller than suit-cases, e.g. travelling articles, or maps in driver or passenger space
B60R 7/00 - Stowing or holding appliances inside of vehicle primarily intended for personal property smaller than suit-cases, e.g. travelling articles, or maps
E05B 83/28 - Locks for glove compartments, console boxes, fuel inlet covers or the like
39.
Direct current power supply circuit mounted in working vehicle
There is provided a direct current power supply circuit mounted in a working vehicle with increased safety as compared with related art by a configuration where a main power source is used after a battery management system (BMS) determines that the main power source can be used. A direct current power supply circuit includes a first power source, a switch, a second power source and a first relay, in which the first power source is connected to a battery management system through the first relay so as to supply direct current power, the battery management system is activated by supply of direct current power from the second power source when the switch is turned on, and the first relay is on-controlled when determined that the first power source can be used.
B60L 58/18 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
B60L 50/64 - Constructional details of batteries specially adapted for electric vehicles
H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
A working device is provided wherein a tilt bucket 70 is pivotally joined, vertically swingably, to the tip of an arm 33 by a third pivot joint pin P3 and is vertically swung by a bucket cylinder 38 via first link members 81A, 81B and a second link member 82. The connection unit 100 to be connected to the first link members 81A, 81B is pivotally joined, vertically swingably, to the tip of the bucket cylinder 38. By switching the connection position of connection pins 131A, 131B of the connection unit 100 and the first link members 81A, 81B selectively between the position of a connection hole H1 and the position of a connection hole H2, the swing range and excavating force of the tilt bucket 70 are switched.
E02F 3/30 - DredgersSoil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam
E02F 3/34 - DredgersSoil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, e.g. dippers, buckets with bucket-arms directly pivoted on the frames of tractors or self-propelled machines
To provide a traveling control mechanism and a traveling control method capable of controlling a traveling mechanism taking into consideration operation contents of a remote control valve. The problem is solved by a traveling control mechanism comprising a remote control valve (21, 22, 23, 24), a pressure adjusting solenoid valve (61, 62), a setting mechanism (70), and a controller (60). The traveling mechanism (8) allows a traveling speed to be switched between a high speed and a low speed in accordance with an operation amount of the remote control valve (21, 22, 23, 24). An HST circuit (30) is provided with a pump (31, 32) and a traveling motor (33), the pump (31, 32) connects to a pilot line (41, 42, 43, 44) allowing a hydraulic oil supplied from the remote control valve (21, 22, 23, 24) to flow therethrough, a pressure sensor (45) is attached to the pilot line (41, 42, 43, 44), and a rotation sensor (65) is attached to the traveling motor (33). The controller (60) controls a pressure of the hydraulic oil supplied from the remote control valve (21, 22, 23, 24) independently of a manual operation of the remote control valve (21, 22, 23, 24), on the basis of a setting signal, a pressure signal, and a rotation speed signal. The remote control valve (21, 22, 23, 24) controls a flow rate of the hydraulic oil discharged from the pump (31, 32) by changing or keeping constant the pressure inside the pilot line (41, 42, 43, 44).
F15B 11/16 - Servomotor systems without provision for follow-up action with two or more servomotors
F15B 11/044 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed by means in the return line
F15B 7/00 - Fluid-pressure actuator systems in which the movement produced is definitely related to the output of a volumetric pumpTelemotors
F16H 61/42 - Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
A hydraulic drive unit of a hydraulic excavator is configured to include a first hydraulic pump (P1) that discharges a hydraulic oil for activating a boom cylinder (36) and the like, a first electric motor (M1) that drives the first hydraulic pump (P1), a hydraulic pump for revolution (P2) that discharges a hydraulic oil for activating a revolution motor (26), a second electric motor (M2) that drives the hydraulic pump for revolution (P2), and a motor control device (150) that controls the rotation of the first electric motor (M1) and that of the second electric motor (M2). The motor control device (150) is configured such that when the revolution of the revolving body is not activated by the revolution motor (26), control to deactivate the second electric motor (M2) is performed.
F15B 11/17 - Servomotor systems without provision for follow-up action with two or more servomotors using two or more pumps
E02F 3/30 - DredgersSoil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam
E02F 3/42 - Drives for dippers, buckets, dipper-arms or bucket-arms
F15B 11/16 - Servomotor systems without provision for follow-up action with two or more servomotors
09 - Scientific and electric apparatus and instruments
Goods & Services
Construction machines and apparatus; earth moving machines; excavators; bulldozers; loaders; dump carriers; shafts, bearings, shaft couplings, power transmissions, shock absorbers, springs, valves, crawler-shoes for earth moving machines, air-filters, window glasses for cabins of earth moving machines; air-filters for earth moving machines, oilfilters for hydraulic actuators of earth moving machines, engine oil-filters for engines of earth moving machines, fuel-filters for engines of earth moving machines, V-belts for engines of earth moving machines; lever grips for earth moving machines; invertors for earth moving machines; electric motors for earth moving machines. Batteries for earth moving machines.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
09 - Scientific and electric apparatus and instruments
12 - Land, air and water vehicles; parts of land vehicles
20 - Furniture and decorative products
Goods & Services
Metal name plates for earth moving machines Earth moving machines for construction, namely, Excavators, Bulldozers, Loaders, Dump carriers; Hydraulic excavators; Excavating machines; Bulldozers; Earth moving machines and parts therefor; Lifting and dumping machines for lifting and dumping dirt in construction excavation; Mixing machines; Agitators for industrial use in the field of chemical processing and in the field of food processing; Shaft bearings for use in earth moving machine, namely, ball bearings and roller bearings, Shaft couplings for machines, Power transmissions for machines, Shock absorbers for machines; Parts of machines, namely springs and valves, Rubber and metal tracks being parts of crawlers on construction machines, air filters for pneumatic controls being part of earth moving machines, air filters for motors and engines of earth moving machines, Oil filters for hydraulic actuators of earth moving machines; Engine oil-filters for engines of earth moving machines, Fuel-filters for engines of earth moving machines, V-belts for engines of earth moving machines; Operational lever knobs for earth moving machines, namely, gear lever knobs and actuator operation lever knobs; Electric motors for earth moving machines; Construction machines in the nature of heavy earth moving machines, namely, excavators, bulldozers and loaders; Replacement parts for Excavators, Bulldozers, Loaders, Dump carriers, and Earth moving machines Batteries for earth moving machines and Invertors for earth moving machines Window glasses for cabins of earth moving machines Non-metal name plates for earth moving machines
A travel control device is provided with hydraulic pumps of a variable capacity type that are driven by an engine; hydraulic motors that are driven by discharged oil from the hydraulic pumps; traveling devices that are rotation-driven by the hydraulic motors; a travel operation lever that is operated so as to instruct a traveling operation; a first control valve for generating a charged hydraulic pressure by adjusting the discharged oil from a charge pump and a second control valve for generating a capacity control hydraulic pressure in accordance with the operation of the travel operation lever. The first control valve is designed to pressure-adjust and generate a charged hydraulic pressure in accordance with the rotation speed of the engine, and the hydraulic pump is subjected to a variable capacity control process by a capacity control hydraulic pressure that is pressure-adjusted and generated by the second control valve.
F16H 61/4139 - Replenishing or scavenging pumps, e.g. auxiliary charge pumps
F16H 61/433 - Pump capacity control by fluid pressure control means
F16H 61/465 - Automatic regulation in accordance with output requirements for achieving a target input speed
F16H 61/478 - Automatic regulation in accordance with output requirements for preventing overload, e.g. high pressure limitation
B60W 10/06 - Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
B60W 10/103 - Infinitely variable gearings of fluid type
B60W 30/188 - Controlling power parameters of the driveline, e.g. determining the required power
F15B 11/10 - Servomotor systems without provision for follow-up action with only one servomotor in which the servomotor position is a function of the pressure
F16H 39/04 - Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit
A working vehicle according to the present invention is configured with a fuel tank, a fuel sensor for detecting an amount of fuel stored in the fuel tank, and an informing device (a controller, informing switch, and speaker) for informing the stored amount of fuel detected by the fuel sensor, by changing the informing pattern in response to this stored amount of fuel. The working vehicle is also configured with an exhaust gas purification system for purifying exhaust gas using urea water, a urea water tank, a urea water sensor for detecting the amount of urea water stored in the urea water tank, and an informing device (the controller, informing switch, and speaker) for informing a stored amount of urea water detected by the urea water sensor, by changing the informing pattern in response to this stored amount of urea water.
B60Q 1/00 - Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
B60C 9/00 - Reinforcements or ply arrangement of pneumatic tyres
G01F 23/00 - Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
E02F 9/08 - SuperstructuresSupports for superstructures
The purpose of the present invention is to reduce the space occupied by a valve block. A control valve (100) is provided with: a valve housing (54) having a spool hole (53) into which a spool (51) is inserted in a slidable manner; a second cylinder port (72) in communication with a chamber (5) on the side of a quick hitch cylinder (1) opposite a rod; and a pilot port (73) provided in communication with a pilot pump (11) and coming into communication with the second cylinder port (72) when pilot pressure is not conducted to a pilot chamber (50). The pilot port (73) is formed open to an outer surface (54c, 54d, 54e) of the outer surfaces of the valve housing (54), the outer surface (54c, 54d, 54e) being other than stacking surfaces (54a, 54b) on which adjacent valve housings (21, 22) are stacked.
F16K 11/07 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only sliding valves with linearly sliding closure members with cylindrical slides
F15B 11/00 - Servomotor systems without provision for follow-up action
In a state in which an arm 21 is oscillated to a lowest position, each control link 22 is arranged to be horizontally extended backward where the control link 22 is pivotally connected to a point A, and is pivotally connected to the arm 21 at a point D. An arm cylinder 23 is arranged to be vertically extended upward where the arm cylinder 23 is pivotally connected to a point B, and is pivotally connected to the arm 21 at a point E. The lift link 24 is arranged to be vertically extended upward where the lift link 24 is pivotally connected to a point C, and is pivotally connected to the arm 21 at a point F. The points E and F are located above the point D.
E02F 3/42 - Drives for dippers, buckets, dipper-arms or bucket-arms
E02F 3/34 - DredgersSoil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, e.g. dippers, buckets with bucket-arms directly pivoted on the frames of tractors or self-propelled machines
A control device for a working machine is provided with an operation unit (19), a hydraulic actuator group (31), a control valve group (32), a hydraulic pump (33), a solenoid valve (35), a pilot valve group (42), first and second accumulators (36, 46), a battery (51), a controller (52), and first and second inverters (53, 54). The controller (52) performs control for stopping the driving of the pump when the operation unit (19) is not operated for a predetermined time or longer, starting the driving of the pump when the internal pressure of the second accumulator (46) decreases and becomes a predetermine lower limit pressure or lower, and stopping the driving of the pump when the internal pressure of the second accumulator (46) increases and becomes a predetermined upper limit pressure or higher by starting the driving of the pump.
A rotation drive control device comprises a rotation operating lever (19a), a rotating hydraulic motor (31), a main hydraulic pump (32), a first electric motor (34), a main control valve (36), hydraulic fluid pressure detecting sensors (40a,40b), a rotating electric motor (51), a controller (52), a first inverter (53), a second inverter (54), a first battery (55), and a second battery (56). The controller (52) performs rotation control of a rotating platform by controlling so as to cause the rotating hydraulic motor (31) and the rotating electric motor (51) to be driven when the rotation operating lever (19a) is operated and the hydraulic fluid pressure is a predetermined pressure or greater, and so as to cause only the rotating electric motor (51) to be driven when the rotation operating lever (19a) is operated and the hydraulic fluid pressure is less than a predetermined pressure.
Disclosed is a hydraulic pressure control device provided with a hydraulic pump (32) which discharges hydraulic oil; hydraulic actuators (39); an operation device (17) which is operated for performing operational control; a discharge pressure sensor (37) which detects the discharge pressure of hydraulic oil discharged by the hydraulic pump (32); a hydraulic oil pressure sensor (38) which detects the hydraulic pressure of the hydraulic actuators; an electric motor (33) which drives the hydraulic pump; an inverter (43) which supplies electric power to the electric motor (33); and a controller (40) which calculates the difference between the discharge pressure detected by the discharge pressure sensor (37) and the hydraulic oil pressure detected by the hydraulic oil pressure sensor (38), and adjusts the amount of electric power supplied to the electric motor (33) so that the difference will take a specific value, thereby changing the discharge pressure of the hydraulic pump (32).
A charging system (50) for an electrically driven operation machine comprises a charger (51) which charges a battery (41) by using electric power supplied from an outside commercial power supply (55), a charging control section (52) which controls the operation of the charger (51), and a thermometer (53) which measures the temperature of the battery (41). When the operations of a pump-driving electric motor (33) etc. are at a stop, the charging control section (52) controls the operation of the charger (51) in such a way that outside of a late night time frame, the charging of the battery (41) is stopped if the temperature of the battery (41) is in excess of a predetermined temperature (-2OC for example), or the battery (41) is charged, resulting in the battery (41) being made to generate heat, if the temperature of the battery (41) is not higher than the predetermined temperature, and that when the late night time frame is reached, the charging of the battery (41) is started.
Provided are hydraulic pumps (32a, 32b) for discharging working oil, a group of hydraulic cylinders (35), a traveling motor (36), an operating device (17) operated to operate/control the group of hydraulic cylinders (35) and the traveling motor (36), an electric motor (33) for driving hydraulic pumps (32a, 32b), a battery (41) for outputting DC power, an inverter (43) for inverting the DC power from the battery (41) into AC power and supplying the power to the electric motor (33), a mode switching means (17a) operated to adjust the magnitude of the AC power supplied to the electric motor (33), and a control device (44) for controlling the adjustment of the magnitude of the AC power supplied to the electric motor (33).
H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
Disclosed is a power supply system of a hydraulic unit comprising a hydraulic pump (32), a pump motor (33), a hydraulic actuator (35), a main battery (41), a sub-battery (42), an inverter (43) that actuates the pump motor (33) by converting DC power from the main battery (41) to AC power and supplying the AC power to the pump motor (33), and a controller (44) that is actuated by receiving DC power from the sub-battery (42), wherein a relay (47) is provided for switching on/off charging from the main battery (41) to the sub-battery (42), and the relay (47) is switched on when the controller (44) detects the remaining amount of electricity in the sub-battery (42), and the remaining amount is less than a prescribed amount.
Disclosed is a configuration wherein a swing drive device (60)is provided with an outer ring (61a) installed on a vehicle body frame (21); an inner ring (61b) installed on a travel frame (11); a swing bearing (61) which swingably supports the vehicle body frame (21); a first internal gear (62) installed integrally with the inner circumferential surface of the inner ring (61b); a ring-shaped member (63) installed between the travel frame (11) and the inner ring (61b); a second internal gear (64) installed integrally with the inner circumferential surface of the ring-shaped member (63); a first pinion (65a) which is installed on an output shaft and meshes with the first internal gear (62); a hydraulic swing motor (65) which, by being supplied with hydraulic oil, rotates the first pinion (65a), thereby giving swing driving force to the vehicle body frame (21); a second pinion (66a) which is installed on the output shaft and meshes with the second internal gear (64); and an electric swing motor (66) which, by being supplied with electric power, rotates the second pinion (66a), thereby giving swing driving force to the vehicle body frame (21), and which regenerates electric power that corresponds to the driven energy received by the vehicle body frame (21); and wherein the number of teeth of the first internal gear (62) and that of the second internal gear (64)are different from each other.
A power generating device comprises a frame, a post for anchoring the frame thereto, a float for floating the frame on the surface of flowing water, a plurality of sprocket wheels rotatably supported on the frame in the direction generally parallel to the flow of the water, a generator for generating electric power by rotating the rotating shaft, chains spanned between the sprocket wheels, respectively, and buckets (60) each having an opening and so attached to the outer peripheries of the respective chains that the openings face in the direction opposite to the flow of the water when the buckets are immersed in the water. The bucket (60) comprises a first box (66) and a second box (67) attached to the first box (66). The power generating device is characterized in that the mounting position of the second box (67) on the first box (66) can be changed in the vertical direction.
A hydraulic control device for a construction machine, configured in such a manner that the amount of drive of electric motors is reduced to reduce the consumption of wasteful energy by the electric motors to thereby increase the energy efficiency with an increase in cost minimized. A hydraulic control device for a construction machine comprises a hydraulically operated primary actuator group and a secondary actuator group which is less frequently used than the primary actuator group. The hydraulic control device also comprises: primary pumps (P1, P2) for supplying operating oil to the primary actuator group; secondary pumps (P3, P4) for supplying the operating oil to the secondary actuator group; an actuator operating means; a remote control valve group (75) and a pilot valve (72) which output pilot pressures according to the amount of operation of the actuator operating means; a primary control valve group (50) and a secondary control valve group (60) which are driven by the pilot pressures and control the flow rate of the operating oil supplied to the hydraulic actuators; a first electric motor (M1) for driving the primary pumps (P1, P2); and a second electric motor (M2) for driving the secondary pumps (P3, P4).
a) and of a bucket (29) vertically swingably attached to the forward end of the pair of lift arms (21,21). The drive power generation section has a pair of electric motors (71,71) for individually transmitting drive power to the pair of travel devices (5,5) and capable of being controlled independent of each other so that a vehicle (10) can be made to travel in a manner the left and right are independent of each other, and also has a battery (50) for supplying electric power to the electric motors (71,71).
An electrically driven industrial vehicle comprising a revolving body (11) attached to a undercarriage (7) so as to be able to turn horizontally; a power shovel device (20) for receiving a hydraulic drive force and operating, the power shovel device being mounted on the revolving body (11); and a hydraulic drive force generating unit provided to the revolving body (11), for generating hydraulic drive force for operating the power shovel device (20). The hydraulic drive force generating unit has a hydraulic fluid tank (73) for storing hydraulic fluid; a hydraulic pump (14) for feeding the hydraulic fluid in the hydraulic fluid tank to the power shovel device (20); an electric motor (13) for driving the hydraulic pump; and a lithium ion battery (50) for feeding electrical drive power to the electric motor.
A crawler type power shovel vehicle (1) driven by a hydraulic actuator (20). The power shovel vehicle (1) is constructed from a hydraulic pump (32) for discharging hydraulic oil for operating the hydraulic actuator (20), an electric motor (31) for driving the hydraulic pump (32), a main battery (50a) for supplying DC power, an inverter (43) for converting the DC power into AC power and operating the electric motor (31), a second relay (47) for making and breaking the connection between the main battery (50a) and the inverter (43), an operation device (14) for operating the hydraulic actuator (20), a controller (42) for controlling operation of the hydraulic actuator (20) and inverter (43) and turning on and off the second relay (47), a first relay (46) for making and breaking the connection between the main battery (50a) and the controller (42), a power source monitoring controller (41) for monitoring conditions of the main battery (50a) and turning on and off the first relay (46), a hydraulic sensor (36) for detecting the discharge pressure of the hydraulic pump (32), and an electric current sensor (49) for measuring a load current flowing into the inverter (43). The electric motor (31) is stopped when there is no change in the discharge oil pressure and load current, and the controller (42) is stopped when no operation is performed.
B60L 11/18 - using power supplied from primary cells, secondary cells, or fuel cells
E02F 9/00 - Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups
H02H 7/18 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteriesEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for accumulators
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
Provided is a crawler type power shovel vehicle (1), which is actuated by a hydraulic actuator (20). The power shovel vehicle (1) comprises an electric motor (31) for driving a hydraulic pump (32) to feed working oil to the hydraulic actuator (20), an oil pressure sensor (36) for detecting the discharge oil pressure of the hydraulic pump (32), a battery (50) for feeding a DC power, an inverter (41) for converting the DC power of the battery (50) into an AC power having a voltage value of a desired magnitude and for feeding the AC power thereby to activate the electric motor (31) at a desired speed, a voltage/current sensor (42) for detecting the output voltage of the battery (50) and a load current to flow from the battery (50) into the inverter (41), an acceleration setting switch (24) for selecting the magnitude of the voltage of the AC power to be applied to the electric motor (31) by the inverter (41), and a control controller (40) for commanding the inverter (41) with the magnitude of the voltage selected by the acceleration setting switch (24) and the speed of the electric motor (31). For every magnitudes of the voltages that can be selected by the acceleration setting switch (24), moreover, the control controller (40) calculates accelerations (ﶴRL, ﶴRM, ﶴRH) from the voltage value, which has the speeds (RL, RM, RH) for the references of the electric motor (31) and which is selected by the acceleration setting switch (24), the discharge oil pressure, the output voltage and the load current, and commands the inverter (41) with their added speed, thereby to activate the electric motor (31).
A crawler type power shovel vehicle (1) operated by a hydraulic actuator (20), constructed from an electric motor (31) for driving a hydraulic pump (32) for supplying hydraulic oil to the hydraulic actuator (20), a battery (50) for supplying DC power, an inverter (41) for operating the electric motor (31) by converting the DC power into AC power and supplying it to the motor, a controller (40) for causing the inverter (41) to control operation of the electric motor (31), and a voltage/current sensor (42) for detecting the magnitude of a load current flowing from the battery (50) into the inverter (41). The controller (40) stops the motor (31) when the magnitude of the load current detected by the voltage/current sensor (42) continuously exceeds a predetermined threshold for a predetermined time period.
B60L 9/18 - Electric propulsion with power supply external to the vehicle using AC induction motors fed from DC supply lines
B60L 11/18 - using power supplied from primary cells, secondary cells, or fuel cells
H02H 7/18 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteriesEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for accumulators
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02P 27/06 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
A shovel loader (1) has a vehicle body frame (9), a travel device (5), a loader device (20), and a drive power generation section for generating drive power for making the travel device (5) travel. The vehicle body frame (9) has a pair of side frames (9a, 9a) arranged on both the left and right sides of the shovel loader (1). The loader device (20) is made up of a pair of lift arms (21, 21) vertically swingably attached to the pair of side frames (9a, 9a) and of a bucket (29) vertically swingably attached to the forward end of the pair of lift arms (21, 21). The drive power generation section has a pair of electric motors (71, 71) for individually transmitting drive power to the pair of travel devices (5, 5) and capable of being controlled independent of each other so that a vehicle (10) can be made to travel in a manner the left and right are independent of each other, and also has a battery (50) for supplying electric power to the electric motors (71, 71).
E02F 3/34 - DredgersSoil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, e.g. dippers, buckets with bucket-arms directly pivoted on the frames of tractors or self-propelled machines
E02F 9/00 - Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups
An electric drive type power shovel vehicle (1) includes: a rotary body (11) having a travel device (2) capable of traveling; a shovel mechanism (12) arranged at a front portion of the rotary body (11); a hydraulic unit (30) for driving the shovel mechanism; an electric motor (33) for driving the hydraulic unit; a main battery (41) for supplying drive power to the electric motor to drive it; and a sub battery (44) having a nominal voltage higher than the main battery and capable of charging the main battery. The vehicle (1) further includes a connection selector (45) for selectively connecting the sub battery (44) to the electric motor (33) and the main battery (41). By connecting the sub battery to the electric motor by the connection selector, it is possible to drive the electric motor by the sub battery. By connecting the sub battery to the main battery by the connection selector, it is possible to charge the main battery by the sub battery.
An electrically-driven service vehicle comprising a turning body (11) attached to a traveling carriage (7) so as to be horizontally turnable, a power shovel device (20) mounted on the turning body (11) to operate on receiving a hydraulic drive force, and a hydraulic drive force generating unit provided on the turning body (11), for generating a hydraulic drive force to operate the power shovel device (20). The hydraulic drive force generating unit comprises a hydraulic oil tank (73) storing hydraulic oil, a hydraulic pump (14) supplying hydraulic oil in the hydraulic oil tank to the power shovel device (20), an electric motor (13) driving the hydraulic pump, and a lithium ion battery (50) supplying drive electric power to the electric motor.
A conveyor (30) having a plurality of buckets (60) lined up in and fixed to an inner side of a frame (10) is supported so that the conveyor can be circulated in the shape of a loop and substantially horizontally in a substantially vertical plane via rotary shafts (20). The frame (10) is supported so that the frame can be slidingly moved in the vertical direction around guide rods (50) stood up on a river bottom. Gas-containing floats (40) are fixed to the frame (10) to float the frame on the surface of the river flowing water. The river flowing water is made to flow into the buckets (60) lined up on the outer surface of the lower circulating portion (32) of the conveyor, and the conveyor (30) is thereby circulated. A generator (70) connected to one of the rotary shafts (20) supporting the conveyor (30) is thereby rotated.
