Abstract

Disclosed is a configurable seamless shift gearbox (100, 506). Configurable seamless shift gearbox comprises input shaft (102, 508) and output shaft (104, 510); gear arrangement (106) engaged between input and output shafts, configured to drive torque from input to output shaft. Gear arrangement comprises first gear member (202), second gear member (108), third gear member (118), and fourth gear member (110A, 110B) that rotationally arranges third gear member thereon; first clutch (112) configured to variably engage and disengage with fourth gear member to transfer input torque from input shaft to gear arrangement; and second clutch (114) configured to variably engage and disengage with second gear member to transfer input torque from gear arrangement to output shaft, wherein first and second clutch selectively engage and disengage with fourth and second gear member, respectively, at same time to enable variable gear ratios for providing a seamless torque from input to output shaft.

IPC Classes  ?

• F16H 3/54 - Gearings having only two central gears, connected by orbital gears with single orbital gears or pairs of rigidly-connected orbital gears comprising orbital spur gears one of the central gears being internally toothed and the other externally toothed
• F16H 59/40 - Output shaft speed
• F16H 59/42 - Input shaft speed
• F16H 59/50 - Inputs being a function of the status of the machine, e.g. position of doors or safety belts
• F16H 59/72 - Inputs being a function of gearing status dependent on oil characteristics, e.g. temperature, viscosity
• F16H 61/04 - Smoothing ratio shift
• F16H 61/32 - Electric motors therefor
• F16H 59/36 - Inputs being a function of speed

Abstract

A balancing arrangement (1) for a hydraulic system (2) com-prises a first rotating unit (3) configured to be connectable to high-pressure line (4) of a hydraulic system, and a second ro-tating unit (5) mechanically coupled to the first rotating unit (3) and configured to be connectable to low-pressure line (6) of the hydraulic system (2). The first rotating unit (3) and the second rotating unit (5) are each configured to be connected to a hydraulic fluid reservoir (7). The displacement of the first rotating unit (3) is configured to be smaller in size than the displacement of the second rotating unit (5), whereby a pres-sure ratio between the high-pressure line (4) and the low-pressure line (6) resulting from the displacement ratio be-tween the first rotating unit (3) and the second rotating unit (5) is configured to cause the rotating unit connectable to the line with excess capacity to start rotating by a movement of hydraulic fluid, thereby forcing the other rotating unit to act as a pump, until balance is restored.

IPC Classes  ?

• F15B 3/00 - Intensifiers or fluid-pressure converters, e.g. pressure exchangersConveying pressure from one fluid system to another, without contact between the fluids
• F15B 21/14 - Energy-recuperation means

Abstract

An electro-hydraulic actuator (1) comprises a cylinder (2) comprising at least three chambers, a piston (3) configured to move within the cylinder and a rod (4) attached to the piston. At least two of the chambers comprise working chambers (5a, 5b) to move the piston (3) and the rod (4). The electro-hydraulic actuator (1) further comprises a hydraulic pump/motor (9) for providing pressure medium to and from the working chambers, and an electric motor (8) rotating the pump/motor (9). At least two working chambers (5a, 5b) comprise equal volumes, and at least one of said chambers, which is not one of said working chambers (5a, 5b), is a reservoir chamber (11) configured to act as an integrated reservoir.

IPC Classes  ?

• F15B 13/02 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
• F15B 13/042 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
• F15B 13/044 - Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors

Abstract

A method of controlling a hydraulic actuator (40, 42), wherein the hydraulic actuator (40, 42) comprises a linear double-acting output member (46), and at least three working chambers (84) in fluid connection with the output member (46), the working chambers (84) having respective effective areas with a non-binary relationship; wherein the method comprises selectively fluidly connecting (S1) each working chamber (84) to either a high- pressure side (48) or a low-pressure side (50) to provide a plurality of discrete pressurization states (92) of the hydraulic actuator (40, 42); determining (S2) at least one of the pressurization states (92) as a prevented pressurization state; and transitioning (S3) between a plurality of allowed pressurization states among the pressurization states (92) while preventing transition to the at least one prevented pressurization state. A hydraulic actuator (40, 42) and a hydraulic system (20) are also provided.

IPC Classes  ?

• E02F 9/22 - Hydraulic or pneumatic drives
• F15B 11/036 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the actuating force by means of servomotors having a plurality of working chambers

Abstract

A method of controlling a rotatable load (22, 24) by a hydraulic system (12), the method comprises determining (S1) if the hydraulic system (12) is in a first operating state or a second operating state; controlling (S2) the rotatable load (22, 24) in a valve control mode if the hydraulic system (12) is in the first operating state, the valve control mode comprising controlling the rotatable load (22, 24) by controlling a valve arrangement (68); controlling (S3) the rotatable load (22, 24) in a displacement control mode if the hydraulic system (12) is in the second operating state, the displacement control mode comprising controlling the rotatable load (22, 24) mainly by controlling the displacement (90) of a hydraulic machine (60, 62); and applying a non-zero absolute minimum displacement limitation (86) to the hydraulic machine (60, 62) at least in the valve control mode.

IPC Classes  ?

• E02F 9/12 - Slewing or traversing gears
• E02F 9/22 - Hydraulic or pneumatic drives
• E02F 9/20 - DrivesControl devices
• G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric

Abstract

The invention relates to a hydraulic device (38) for a hydraulic system (12). The hydraulic device (38) comprises a chamber arrangement (46) comprising at least one high-pressure chamber (48) for connection to a high-pressure side (40) of the hydraulic system (12), and at least one low-pressure chamber (50) for connection to a low-pressure side (42) of the hydraulic system (12); and a movable member (96) arranged to reciprocate at least partly inside the chamber arrangement (46) in response to pressure variations within the at least one high-pressure chamber (48) and within the at least one low-pressure chamber (50). The chamber arrangement (46) further comprises at least one tank chamber (52) for connection to a tank-pressure side (44) of the hydraulic system (12).

IPC Classes  ?

• E02F 9/22 - Hydraulic or pneumatic drives

Abstract

A hydraulic system (10) for driving a rotatable load comprises: a high-pressure line (40) for hydraulic fluid; a pump (12) configured to supply pressurized hydraulic fluid to the high-pressure line (40); a variable displacement hydraulic machine (22) connected by a fluid connection to the high-pressure line (40) for rotationally driving the rotatable load; an electronic control unit (30); an energy storing device (26) connected to the high-pressure line (40) and configured to communicate with the high-pressure line by receiving energy from the high- pressure line and/or supplying energy to the high-pressure line; and a first detector (34, 36) configured to detect the amount of energy stored in the energy storing device (26) and to transmit a signal (50) indicating said amount of energy stored to the electronic control unit (30). The electronic control unit (30) is configured to control the volume flow intake of the variable displacement hydraulic machine (22) dependent on a target output of the variable displacement hydraulic machine and on the detected amount of energy stored in the energy storing device (26).

IPC Classes  ?

• 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

Abstract

A hydraulic system including: a pressure line; a pump; an actuator; a valve device configured to control the flow of pressurized hydraulic fluid to the actuator; an electronic control unit configured to control the valve device by a control signal proportional to the desired speed of the actuator at any given time; a pressure accumulator capable of supplying, together with the pump, pressurized hydraulic fluid for moving the actuator; a sensor device configured to measure, directly or indirectly, the amount of pressurized hydraulic fluid in the pressure accumulator at any given time; setting devices configured to set a setting signal to be proportional with the desired speed of the actuator at any given time. The electronic control unit is configured to restrict the targeted speed of the actuator not to exceed a predetermined maximum speed which is proportional to the amount of pressurized hydraulic fluid in the pressure accumulator.

IPC Classes  ?

• F15B 1/02 - Installations or systems with accumulators
• 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

Abstract

A hydraulic system comprising: a pressure line (40); a pump (12); an actuator (22); a valve device (38) configured to control the flow of pressurized hydraulic fluid to the actuator (22); an electronic control unit (30) configured to control the valve device (38) by a control signal (32) proportional to the desired speed of the actuator (10) at any given time; a pressure accumulator (26) capable of supplying, together with the pump (12), pressurized hydraulic fluid for moving the actuator (22); a sensor device (34, 36) configured to measure, directly or indirectly, the amount of pressurized hydraulic fluid in the pressure accumulator (26) at any given time; setting devices configured to set a setting signal (50) to be proportional with the desired speed of the actuator (22) at any given time. The electronic control unit (30) is configured to restrict the targeted speed of the actuator (22) not to exceed a predetermined maximum speed which is proportional to the amount of pressurized hydraulic fluid in the pressure accumulator (26). In an example, said sensor device (34, 36) is configured to measure the pressure or amount of hydraulic fluid in the pressure accumulator (26). In an example, the system is provided in a crane which may be included in a machine.

IPC Classes  ?

• F15B 1/02 - Installations or systems with accumulators

Abstract

A hydraulic system comprising: a pressure line (40); a pump (12); an actuator (22); a valve device (38) configured to control the flow of pressurized hydraulic fluid to the actuator (22); an electronic control unit (30) configured to control the valve device (38) by a control signal (32) proportional to the desired speed of the actuator (10) at any given time; a pressure accumulator (26) capable of supplying, together with the pump (12), pressurized hydraulic fluid for moving the actuator (22); a sensor device (34, 36) configured to measure, directly or indirectly, the amount of pressurized hydraulic fluid in the pressure accumulator (26) at any given time; setting devices configured to set a setting signal (50) to be proportional with the desired speed of the actuator (22) at any given time. The electronic control unit (30) is configured to restrict the targeted speed of the actuator (22) not to exceed a predetermined maximum speed which is proportional to the amount of pressurized hydraulic fluid in the pressure accumulator (26). In an example, said sensor device (34, 36) is configured to measure the pressure or amount of hydraulic fluid in the pressure accumulator (26). In an example, the system is provided in a crane which may be included in a machine.

IPC Classes  ?

• F15B 1/02 - Installations or systems with accumulators

Abstract

A hydraulic system and a method comprising a linear actuator 23 for generating discrete sum forces, chambers A-D for generating discrete force components, at least two charging circuits 3,4 configured to maintain predetermined pressure levels of hydraulic fluid, independent control interfaces 9-16 configured to open and close connections of the first and second charging circuits to the chambers, and an electronic control unit 50 for controlling the control interfaces. At least two control interfaces are proportional valves which are used as shut-off valves and are independently switchable to the open and closed positions in a controlled manner. Moreover, non-throttled control and secondary control are implemented in the hydraulic system and the method.

IPC Classes  ?

• F15B 11/00 - Servomotor systems without provision for follow-up action
• F15B 1/027 - Installations or systems with accumulators having accumulator charging devices
• F15B 11/036 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the actuating force by means of servomotors having a plurality of working chambers
• F15B 11/042 - 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 feed line

Goods & Services

Machines and machine tools for the cutting and forming of materials; hydraulic engines and motors; Electric motors for machines; linear motors; machine coupling and transmission components, except for land vehicles; cylinders for machines, motors and engines; electric pressure converters for machines, motors and engines; hydraulic pressure converters for machines, motors and engines; hydraulic pumps; hydraulic valve actuators containing hydraulic cylinders for machines, hydraulic pressure converters and hydraulic pumps Scientific apparatus, namely, sensing and signaling devices for measurement and quality control of cylinders for machines, motors and engines; measuring apparatus, namely, pressure sensors and electronic sensors for motion for surveillance and control of cylinders; electronic control systems for machines; control automatic valves for machinery; hydraulic control automatic valves for machines, motors and engines; safety control automatic valves for accumulators; energy level control valve units consisting of automatic valves; blank magnetic data carriers, blank recording discs; data processing equipment and computers; electronic controllers and computer programs for controlling hydraulic actuators and hydraulic cylinders Machinery installation, maintenance and repair services; installation, maintenance and repair services of hydraulic actuators and hydraulic cylinders

Abstract

A hydraulic system and a method comprising a linear actuator 23 for generating discrete sum forces, chambers A-D for generating discrete force components, at least two charging circuits 3,4 configured to maintain predetermined pressure levels of hydraulic fluid, independent control interfaces 9-16 configured to open and close connections of the first and second charging circuits to the chambers, and an electronic control unit 50 for controlling the control interfaces. At least two control interfaces are proportional valves which are used as shut-off valves and are independently switchable to the open and closed positions in a controlled manner. Moreover, non-throttled control and secondary control are implemented in the hydraulic system and the method.

IPC Classes  ?

• F15B 11/036 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the actuating force by means of servomotors having a plurality of working chambers

Abstract

A method and a pressurized medium system, including: at least one actuator to generate sum forces effective on a load; a working chamber operating by displacement and located in the actuator; a charging circuit of a higher pressure, which is a source of hydraulic power; a charging circuit of a lower pressure, which is a source of hydraulic power; a control circuit, that couples the charging circuit of higher pressure and the charging circuit of lower pressure, in turn, to the working chamber; wherein the working chamber is capable of generating force components that correspond to the pressure of the charging circuit to be coupled to the working chamber, and each force component produces at least one of the sum forces either alone or in combination with the force components produced by the other working chambers of the actuator.

IPC Classes  ?

• F15B 11/036 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the actuating force by means of servomotors having a plurality of working chambers
• F15B 21/14 - Energy-recuperation means

Goods & Services

Machines and machine tools; motors and engines (except for land vehicles); machine coupling and transmission components (except for land vehicles); cylinders for machines, motors and engines; pressure converters for machines, motors, and engines; hydraulic pumps; hydraulic actuators containing hydraulic cylinders, hydraulic pressure converters and hydraulic pumps. Scientific, measuring, signalling, checking (supervision) and teaching apparatus and instruments; magnetic data carriers, recording discs; data processing equipment and computers; control apparatus and computer programs for controlling hydraulic actuators and hydraulic cylinders. Installation, maintenance and repair services; installation, maintenance and repair services of hydraulic actuators and hydraulic cylinders.

Goods & Services

Machines and machine tools; motors and engines (except for land vehicles); machine coupling and transmission components (except for land vehicles); cylinders for machines, motors and engines; pressure converters for machines, motors, and engines; hydraulic pumps; hydraulic actuators containing hydraulic cylinders, hydraulic pressure converters and hydraulic pumps. Scientific, measuring, signalling, checking (supervision) and teaching apparatus and instruments; magnetic data carriers, recording discs; data processing equipment and computers; control apparatus and computer programs for controlling hydraulic actuators and hydraulic cylinders. Installation, maintenance and repair services; installation, maintenance and repair services of hydraulic actuators and hydraulic cylinders.

Abstract

A method and a pressurized medium system, comprising: at least one actuator (23) or actuator unit, by means of which it is possible to generate sum forces (Fcyl) effective on said load; at least one working chamber (19, 20, 21, 22) operating by the principle of displacement and located in said actuator or actuator units; at least one charging circuit (HPi, HPia) of a higher pressure, which is a source of hydraulic power; at least one charging circuit (LPi, LPia) of a lower pressure, which is a source of hydraulic power; a control circuit (40), by means of which at least one said charging circuits of higher pressure (HPi, HPia) and at least one of said charging circuits of lower pressure (LPi, LPia) can be coupled, in turn, to at least one of said working chambers (19, 20, 21, 22); wherein each of said working chambers (10, 20, 21, 22) is capable of generating force components (FA, FB, FC, FD) that correspond to the pressures of the charging circuits (HPi, HPia, LPi, LPia) to be coupled to said working chamber, and each force component produces at least one of said sum forces either alone or in combination with the force components produced by the other working chambers of said actuator or actuator unit. The actuator unit is, for example, a slewing device or a rotating device. The system utilizes a controller in the control of the control circuit.

IPC Classes  ?

• F15B 11/02 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member
• F15B 11/042 - 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 feed line
• F15B 11/17 - Servomotor systems without provision for follow-up action with two or more servomotors using two or more pumps

Abstract

A method and a pressurized medium system, comprising: at least one actuator (23) or actuator unit, by means of which it is possible to generate sum forces (Fcyl) effective on said load; at least one working chamber (19, 20, 21, 22) operating by the principle of displacement and located in said actuator or actuator units; at least one charging circuit (HPi, HPia) of a higher pressure, which is a source of hydraulic power; at least one charging circuit (LPi, LPia) of a lower pressure, which is a source of hydraulic power; a control circuit (40), by means of which at least one said charging circuits of higher pressure (HPi, HPia) and at least one of said charging circuits of lower pressure (LPi, LPia) can be coupled, in turn, to at least one of said working chambers (19, 20, 21, 22); wherein each of said working chambers (10, 20, 21, 22) is capable of generating force components (FA, FB, FC, FD) that correspond to the pressures of the charging circuits (HPi, HPia, LPi, LPia) to be coupled to said working chamber, and each force component produces at least one of said sum forces either alone or in combination with the force components produced by the other working chambers of said actuator or actuator unit. The actuator unit is, for example, a slewing device or a rotating device. The system utilizes a controller in the control of the control circuit.

IPC Classes  ?

• F15B 11/02 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member
• F15B 11/042 - 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 feed line
• F15B 11/17 - Servomotor systems without provision for follow-up action with two or more servomotors using two or more pumps