114results about "Telemotors" patented technology

An actuator system for articulated mechanism may have a fluid actuator having a displaceable member operating an output configured to apply an output force to the articulated mechanism. A fluid system may be in fluid communication with the fluid actuator to supply the fluid actuator with motive fluid to contribute to the output force. The fluid system may include a pressure reservoir configured for storing fluid, a pumping device for controlling a pressure of the fluid in the reservoir, and a circuit for directing the fluid from the reservoir to the fluid actuator. An actuator device may be operatively connected to the fluid actuator to apply a variable force to the displaceable member to contribute to the output force.

An open and closed circuit parallel drive system and a control method based on a four-chamber hydraulic cylinder are provided. The system includes: a closed pump-controlled drive unit and an open valve-controlled drive unit. The four-chamber hydraulic cylinder is driven by the open valve-controlled drive unit with a large load power, and the operating velocity and displacement of the four-chamber hydraulic cylinder are controlled by the closed pump-controlled drive unit with a small load power, thereby improving the linearity and stability of the four-chamber hydraulic cylinder control and reducing the system installed power and throttling loss.

Actuator (1, 1a, 1b), in particular hydrostatic actuator, for a motor vehicle with a rotor (3) and a stator (4) with at least one winding (8) and a circuit board (6, 6a, 6b) controlling the current supply to the at least one winding (8) and at least one connection (9) of the at least one winding (8) to the circuit board (6, 6a, 6b), wherein at least one compensating element (11, 11a) is connected to the circuit board (6, 6a, 6b) with a cantilever (12) following the path of the at least one connection (9) passing through the circuit board (6, 6a, 6b), and the at least one connection (9) and the cantilever (12) are electrically connected to each other on the side of the circuit board (6, 6a, 6b) facing away from the at least one winding (8), the at least one compensating element (11, 11a) by means of three uniformly spaced Mounting pins (13, 13a) are attached to the circuit board (6, 6a, 6b), and between a,The central part (15) receiving the boom (12) and the fastening pins (13, 13a) each has a curved arm (17, 17a), characterized in that the respective arm (17, 17a) is curved in a plane parallel to the circuit board (6, 6a, 6b).

A system and method for a hydraulic swing system of a machine to prevent drift without engaging a swing brake is described. The hydraulic swing system includes a pump powered by a motive element such as an engine and provides a swing motor for rotating the chassis of the machine relative to the undercarriage. The swing system includes a control valve on a first path between the pump and the motor and a second control valve on a second path. The swing system further includes a blocking valve to blocking hydraulic fluid flow and thereby preventing drift engaged when the system is in neutral and below a threshold rotation rate.

The invention relates to a hydraulic actuator (1) having the ability to recover energy from the pressure of a hydraulic fluid, having at least one bidirectionally operable hydraulic pump (2) for pumping the hydraulic fluid, the hydraulic pump (2) having two ports (6a, 6b); and a hydraulic actuator assembly (3) having two hydraulic fluid chambers (4a, 4b) to which hydraulic fluid can be applied in order to drive the hydraulic actuator assembly (3), in which the hydraulic fluid chambers (4a, 4b) are each connected to the ports (6a, 6b) of the hydraulic pump (2) by means of pipelines (7a, 7b), such that when one of the hydraulic fluid chambers (4a, 4b) is filled with hydraulic fluid, the hydraulic fluid is supplied to the hydraulic actuator assembly (3). The second chamber (4b) has a second chamber cross-section (8b) which is different from the first chamber cross-section (8a) of the first chamber (4a), and wherein the first chamber (4a) is connected to a pressure accumulator (5), and wherein the second chamber cross-section (8b) of the second chamber (4b) is different from the first chamber cross-section (8a) of the first chamber (4a). A differential volume (28) can be received and provided in the pressure accumulator, the differential volume (28) being caused by different chamber cross-sections (8a, 8b) of the chambers (4a, 4b); wherein a first line (7a) connects the first chamber (4a) to the hydraulic pump (2), a second line (7b) connects the second chamber (4b) to the hydraulic pump (2), and the first line (7a) and the second line (7b) are further connected to each other by a bypass line (9) by means of which when the pressure in the second line (7b) drops from above to a threshold value, the pressure in the second line (7b) drops from above to the threshold value. According to the invention, a bypass flow from the first line (7a) into the second line (7b) is established via a bypass line (9) in order to prevent an insufficient supply of hydraulic fluid in the hydraulic pump (2), a deactivation circuit (11) being arranged in the bypass line (9), by means of which the bypass line (9) can be interrupted when the pressure in the second line (7b) is above a threshold value.

Slide valve (V3) comprising a valve element (111) and a cylinder (112) with a bore (112a) that accommodates the valve element (111) to be movable in an axial direction, and designed such that when the valve element (111) moves in an initial position in the axial direction relative to the cylinder (112), a supply valve port (Vi) formed between the valve element (111) and the cylinder (112) opens, thereby introducing a working fluid from a hydraulic pressure source (31) through the supply valve port (Vi) into a hydraulic chamber, wherein a throttle section (O3) is provided in a fluid channel formed between the supply valve port (Vi) and the hydraulic pressure source (31), or in a fluid channel formed between the supply valve port (Vi) and the hydraulic chamber, wherein the throttle section (O3) is designed such that the area of ​​an opening formed between the valve element (111) and the cylinder (112) is constant in a throttle effectiveness range extending from the initial position to a position where the magnitude of an axial movement of the valve element (111) from the initial position becomes equal to a predetermined value, and the area of ​​the opening increases in a throttle ineffective range where the magnitude of an axial movement of the valve element (111) exceeds the predetermined value. characterized by the fact that the throttle section (O3) is provided at a position axially offset by a predetermined amount from one end of a wall surface of the bore (112a) of the cylinder (112), the end of which forms the feed valve port (Vi); wherein the throttle section (O3) is formed by an outer circumferential surface of the valve element (111) and a cylindrical projection (112e1) having a predetermined thickness and extending along the entire circumference of an inner end of a connecting hole (112e) formed in the cylinder (112) and communicating with the bore (112a) of the cylinder (112) at its inner end; and wherein a recess (112g) is formed between the cylindrical projection (112e1) and the end of the wall surface of the bore (112a) of the cylinder (112), the end of which forms the feed valve port (Vi), and the connecting hole (112e) and the cylindrical projection (112e1) are formed by a tube (P) which is fluid-tightly joined to the cylinder (112).

Disclosed herein are various embodiments of a hydraulic actuator that includes one or more check valves having a dynamically varying cracking pressure. In certain embodiments, a hydraulic actuator may be configured to vary the cracking pressure of a check valve based on an operating condition of a pump of the hydraulic actuator. The check valve may be located along a bypass path in the hydraulic actuator, thereby allowing for fluid flow to bypass a pump of the hydraulic actuator by passing through the check valve. The use of such hydraulic actuators is contemplated in, for example, an active suspension system of a vehicle.Additionally, various embodiments of suitable check valves are disclosed. Additionally, methods are disclosed for operation of the check valve and the hydraulic actuator.

2. Method for positioning an actuator (12), in particular in the form of a hydraulic working cylinder (14) which is connected to a hydraulic supply circuit (10) with a pressure supply device (32) in the form of a motor-pump group (34), characterized in that during the movement process of the actuator (12) a theoretical position s (t) is determined by means of the hydraulic transmission ratio between the pump (36) and the actuator (12) taking into account the respective current rotational speed n of the motor (M). zyl - and actual speed value v (t) zyl is calculated and that at least this theoretical actual position value serves as the actual value of a position controller for a motor control (FU) of the motor-pump group (34).

The invention relates to a hydraulic drive system, to a method for adjusting a delivery volume in a hydraulic drive system, and to the use of the hydraulic drive system for controlling a hydraulic cylinder. The hydraulic drive system according to the invention is a hydraulic drive system with a first hydraulic machine and a second hydraulic machine which are connected mechanically to one another. The first hydraulic machine and the second hydraulic machine are operated jointly by a variable-speed drive. The first hydraulic machine and the second hydraulic machine are connected hydraulically to at least one first hydraulic cylinder, comprising a first hydraulic cylinder surface and a second hydraulic cylinder surface. The first hydraulic machine and / or the second hydraulic machine have / has an adjustable delivery volume.

Assembly (10) for actuating a clutch (48) with a clutch actuator (44) and with a hydraulic unit (12) with a reversing pump (18) which has two pump connections (20, 22) that act as suction and pressure connections depending on the direction of rotation, with at least one suction inlet (26) for drawing in hydraulic fluid, wherein a suction line section (30, 32) extends from the suction inlet (26) to each of the pump connections (20, 22) and a check valve (38, 40) blocking in the direction of the suction inlet (26) is arranged in each of the suction line sections (30, 32), wherein a first pressure line (34) extends from a first pump connection (20) to a lubricant connection (14) of the hydraulic unit (12), wherein a check valve (42) blocking in the direction of the pump connection is arranged in the first pressure line (34), wherein a second pressure line (36) leads from a second pump connection (22) to an actuator connection (16) of the hydraulic unit (12), wherein the second pressure line (36) is free of valves, wherein the clutch actuator (44) is connected to the actuator port (16) of the hydraulic unit (12), wherein the clutch actuator (44) is a single-acting hydraulic piston (46) which works against a return spring (47), wherein a locking bolt (52) is provided which interacts with the hydraulic piston (46), wherein a magnetic coil (58) is associated with the locking bolt (52), and wherein two radial notches (54, 56) are provided on the hydraulic piston (46) which are arranged such that the hydraulic piston (46) is held in an actuating position when the locking bolt (52) engages in the first notch (54) and the hydraulic piston is held in an open position when the locking bolt (52) engages in the second notch (56) in which the clutch (48) is open.

The application belongs to the technical field of hydraulic control and relates to a pump-valve dual-source driving hydraulic cylinder speed and position composite control system for engineering machinery, which comprises a first power source, a first hydraulic pump, a second power source, a second hydraulic pump, a safety valve, a proportional directional valve, a hydraulic control check valve, a hydraulic cylinder, a handle, an oil tank, a rotating speed sensor, a first pressure sensor, a second pressure sensor, a third pressure sensor, a temperature sensor, a position signaling device, a magnetic induction marker, a counting correction module, an integration module, a calculation control module, a signal acquisition module, a data storage module, a cloud storage, a communication protocol module, a fault diagnosis module and a process monitoring module. Compared with the prior art, the application can realize flow detection, speed and displacement detection and control and fault diagnosis.

An accumulator assembly is interposed hydraulically between a source of pressurized fluid and at least one wheel brake of a corresponding first or second pair of wheels. The accumulator assembly includes a medium pressure accumulator, a nonpowered MPA fill valve interposed fluidically between a pump-side passage of the medium pressure accumulator and the source of pressurized hydraulic fluid, a powered MPA one-way valve interposed fluidically between a brake-side passage of the medium pressure accumulator and the at least one corresponding wheel brake, and an MPA check valve interposed fluidically between the brake-side passage of the MPA cavity and the at least one corresponding wheel brake. An electronic control unit is provided for controlling at least one of the secondary brake module and the master cylinder responsive to at least one braking signal. The accumulator assembly facilitates a non-powered evac / fill phase of lifetime operation of the brake system.

The utility model relates to a driving device which is provided with an electric hydraulic driver (10) and a hydraulic auxiliary system (12), the hydraulic auxiliary system generates auxiliary torque, and the auxiliary torque counteracts main torque of the electric hydraulic driver (10) when needed.

A hydraulic system includes: a first bi-directional pump connected to a head-side chamber of a single-rod cylinder by a head-side line and connected to a rod-side chamber of the single-rod cylinder by a rod-side line; and a second bi-directional pump connected to the head-side line by a supply / discharge line, the second bi-directional pump being a variable displacement pump. The hydraulic system further includes a low-pressure selection valve connected to the head-side line by a first discharge line and connected to the rod-side line by a second discharge line, wherein the low-pressure selection valve allows the second discharge line or the first discharge line to communicate with a relief line on which a relief valve is located.

The present invention provides a method and device for reducing the positive pressure of a universal joint receiving working cylinder. The method is applied to a universal joint receiving working cylinder, and the device used in the method includes a foundation, a base frame, a force applying device, a direction adapting device, a universal swing rod device, and an integrated external connection device. The method includes the following steps: a first step of determining the main design parameters and the type of the force applying device; a second step of designing the device structure after determining the main design parameters and the type of the force applying device; and a third step of calculating, testing, and evaluating the effect of the actual gravity moment or positive pressure and weight compensation, judging whether it meets the design requirements, and calculating or testing and evaluating the gravity moment and reduction rate. The method solves the technical problem that the working cylinder has a large side force, which increases the power burden of the system.

A hydraulic drive system for operating a hydraulic cylinder in first and second movement profiles. A hydraulic drive unit includes first and second hydraulic machines, each with first and second connections. In the first movement profile, a first cylinder chamber of the hydraulic cylinder is fluidly connected to a first fluid reservoir and a second cylinder chamber is fluidly connected to the second connection of the second hydraulic machine. In the second movement profile, the first connection of the first hydraulic machine is connected to the second connection of the second hydraulic machine.

A hydraulic actuator comprising a housing, a piston, first to third pressure chambers, and a plurality of arrangements of piezoelectric elements arranged inside one of the plurality of chambers. A computer implemented internal brake for selectively switching between a braking mode and a non-braking mode of the piston comprises the third chamber, and fluid connections between the first to third chambers with flow control elements.

The present invention relates to a hydraulic tank (13) for a bicycle comprising a first wall (25) on which an atmospheric pressure acts, a second wall (26) opposite to the first wall (25), a side wall (27) and an elastically deformable membrane (28) operating between the first wall (25) and the second wall (26) and defining a compensation chamber (29) within the tank (13). The first wall (25) of the tank comprises at least one ventilation hole (30) and a ventilation channel (31) which is in fluid communication with the ventilation hole (30) and has a first inlet opening (32) arranged on a first portion (33) of the side wall (27) of the tank.

An air purging disc brake master cylinder assembly is provided. A master cylinder reservoir housing 12 is oriented vertically relative to the disc brake master cylinder assembly. A bladder cap member

The invention relates to an actuating device (49) for actuating a mechanical device (100), by means of which the actuating is to be carried out completely or at least approximately without external reaction forces. For this purpose, the actuating device (49) is provided for introducing a tensile force (53) and an opposing compressive force (54) into the device (100), with at least one tensile element (51) for transmitting the tensile force (53) to the device (100) and at least one compressive element (52) for transmitting the compressive force (54) to the device (100), wherein the at least one tensile element (51) and the at least one compressive element (52) are operatively connected to generate a relative movement (62) via an actuator (50) floating between them.

A hydraulic drive includes a hydraulic circuit having a hydraulic machine, a hydraulic consumer, a first hydraulic line, and a second hydraulic line. The hydraulic drive further includes an inertia charging arrangement having a hydraulic motor configured, in response to a power failure of the hydraulic drive, to receive hydraulic fluid from a high-pressure line of the first and second hydraulic lines and to expel hydraulic fluid to a low-pressure line of the first and second hydraulic lines, and a hydraulic pump operably connected to the hydraulic motor such that the hydraulic motor drives the hydraulic pump. The hydraulic pump is configured to pump hydraulic fluid from a reservoir into the low-pressure line.

An example electrohydraulic actuator includes: a housing; a hydraulic cylinder actuator disposed within the housing and comprising a cylinder and a piston, wherein the piston divides an internal space of the cylinder into a first chamber and a second chamber, and wherein the hydraulic cylinder actuator is unbalanced; an accumulator disposed within the housing and comprising an annular fluid chamber encircling the cylinder of the hydraulic cylinder actuator, wherein the accumulator is configured to provide boost fluid flow or receive excess fluid flow comprising a difference between the first fluid flow rate and the second fluid flow rate; and an assembly disposed within the housing and comprising: (i) a pump configured to be a flow source, and (ii) an electric motor configured to drive the pump to provide fluid flow to the first chamber or the second chamber of the hydraulic cylinder actuator to drive the piston.

An apparatus and method for recirculating hydraulic fluid includes commanding a fluid switching valve to a first actuating position where pressurized hydraulic fluid moves a piston; detecting when the piston has completed a first stroke; delay commanding the fluid switching valve to a second actuating position, a bypass valve to a bypass position, or a hydraulic pump to stop pressurizing hydraulic fluid, the piston-bypass valve is open such that hydraulic fluid is fluidly communicated into a sub-circuit through an entry port and through the piston-bypass valve wherein a quantity of hydraulic fluid is flushed out of the sub-circuit through an exit port; and command the fluid switching valve to the second actuating position, the bypass valve to the bypass position, or the hydraulic pump to stop pressurizing the hydraulic fluid.

Hydraulic power supply device for providing a working fluid with a controlled flow rate and / or constant pressure level in an aircraft application, comprising at least one motor and at least one pump, wherein the motor is speed-controlled and the pump is a constant-speed pump or wherein the motor is a constant-speed motor and the pump is a variable-speed pump, at least one first and at least one second pump connection, wherein the first pump connection is connectable to at least one load pressure signaling system and the first and second pump connections are connectable to at least one control signal signaling system, characterized in that the load pressure signaling system comprises a device for measuring the output pressure of the constant-speed pump and that the control signal signaling system comprises a device for detecting the control signal of at least one consumer.the rotational speed of the constant pump is adjustable depending on the output pressure and / or the control signal.

The hydromechanical device (102) for supplying each of two opposing active chambers (vr1ca1, vr1ca2) of a double-acting receiving cylinder (vr1) for servo-controlled operation of at least one first output rod (vr1ts1, vr1ts2) INCLUDES: a first double-acting generating cylinder (vg1) INCLUDING a first movement input rod (vg1te1) which is rigidly connected to a first piston (vg1p1) that delimits two first opposing passive chambers (vg1cp1, vg1cp2), each of which is selectively connected to at least one of THE two opposing active chambers of the receiving cylinder (vr1); and an assembly (110) for driving the first rod (vg1te1) of the first generating cylinder (vg1), INCLUDING a movement-transforming screw-nut assembly (112, 114), one movement output component (114) of which is rigidly connected to the first rod (vg1te1) of the first generating cylinder (vg1) and the other movement input component (112) of which is rotated by a drive motor (m1).

The invention relates to a method for positioning an actuator (12), in particular in the form of a hydraulic cylinder (14), which is connected to a hydraulic supply circuit (10) having a pressure-supply device (32) in the form of a motor-pump group (34), characterized in that, during the movement process of the actuator (12), by means of the hydraulic transmission ratio between the pump (36) and the actuator (12), taking into account the current rotational speed n of the motor (M), a theoretical actual position value s (t)zyl and actual speed value v (t)zyl is calculated, and in that at least this theoretical actual position value is used as an actual value for a position controller for a motor controller (FU) of the motor-pump group (34).

A hydraulic system includes a hydraulic circuit having a hydraulic machine, a hydraulic consumer, and a first hydraulic line fluidically connecting the hydraulic machine to the hydraulic consumer. The hydraulic system further includes a conditioning circuit having a hydraulic motor configured to withdraw a portion of hydraulic fluid flowing in the first hydraulic line from the hydraulic machine to the hydraulic consumer, the hydraulic motor configured to capture energy from the portion of hydraulic fluid, a conditioning arrangement downstream of the hydraulic motor and configured to condition the portion of hydraulic fluid, and a hydraulic pump arranged downstream of the conditioning arrangement and configured to pump the portion of hydraulic fluid into the first hydraulic line, the hydraulic pump being operably connected to the hydraulic motor and configured to operate at least partially using the energy captured by the hydraulic motor.

A hydraulic circuit control device includes: a drive motor; a drive-side cylinder including a drive-side fluid chamber and a drive-side piston that is moved by the drive motor; a driven-side cylinder including a driven-side fluid chamber, a fluid path that connects the driven-side fluid chamber and the drive-side fluid chamber, and a driven-side piston that is moved by moving the drive-side piston to increase or reduce an amount of a working fluid in the driven-side fluid chamber through the fluid path; and a fluid path volume adjustment mechanism configured to increase or reduce a volume of the fluid path according to an increase or reduction in a volume of the working fluid.

Filter unit (5) for filtering a fluid in a hydraulic system, in particular for a coupling system (2), with a housing (10) for arrangement in the hydraulic system, wherein the housing has a flow section (15) for guiding the fluid along a defined flow path (S) through the filter unit (5), with a magnet (9) for separating ferromagnetic particles from the fluid, wherein the magnet is arranged inside the housing (10), wherein the magnet (9) is designed as a ring magnet (16), wherein the flow path (S) runs through a central opening (23) of the ring magnet (16), wherein a circumferential recess (17) is provided in an inner circumference of the housing (10), wherein the ring magnet (16) is recessed in the recess (17), characterized in that the recess (17) is designed as a stepped annular groove, wherein a receiving area (19) for receiving the magnet (16) is formed by a first step of the stepped annular groove, and a trapping area (18a) for forming a trap for the ferromagnetic particles is formed by a second step of the stepped annular groove, and in that a further trapping area (18b) is formed by a third step, wherein the receiving area (19) is axially located between the two Trap areas (18a,b) is arranged such that the ring magnet (16) is spaced apart from the housing (10) on both sides by means of an annular gap in sections.