38results about "Hydraulic steering gears" patented technology

Disclosed herein is a steering device (1) for a vehicle, the steering device (1) comprising, namely, a hydraulic drive unit (2), a converter unit (3), and an output element (4) configured to apply output torque or output to a steering mechanism, wherein the hydraulic drive unit (2) is fluidly connected to the converter unit (3), thereby allowing the hydraulic drive unit (2) to hydraulically apply pressure to the converter unit (3), the converter unit (3) comprising a piston (3.1) and a transmission unit (3.2), where, when hydraulic pressure is applied to the piston (3.1), the piston (3.1) transmits a piston force to the transmission unit (3.2), and the transmission unit (3.2) applies output torque or output to the output element (4) in accordance with the transmitted piston force, thus the steering device (1). Further disclosures include a steering system and a vehicle.

The present disclosure provides an asphalt finisher capable of improving the accuracy of rudder angle control. The asphalt finisher is provided with a plurality of wheels including a steering wheel, a steering cylinder (54) that adjusts the rudder angle of the steering wheel, and a hydraulic pump (55) that supplies working oil to the steering cylinder (54). Furthermore, the asphalt finisher is provided with a proportional control valve (56p) disposed between the hydraulic pump (55) and the steering cylinder (54) and controlling the flow rate and direction of the working oil supplied to the steering cylinder (54), and a controller that controls the rudder angle by controlling the proportional control valve (56p).

The present disclosure relates to a hydraulic steering system (100) for steering a vehicle with a steering mechanics (112). The hydraulic steering system (100) includes a hydraulic steering unit (101). A single hydraulic steering unit (101) includes two outlet ports (111) configured to allow hydraulic fluid to be discharged from the hydraulic steering unit (101) to the steering mechanics (112) of the vehicle, at least two redundant hydraulic components (108, 109) configured to change a hydraulic flow of the hydraulic fluid and to be fluidically connected to the outlet ports (111), a first steering control device (102) for controlling a first hydraulic component (108) of the at least two hydraulic components (108, 109) and configured to change the hydraulic flow in the hydraulic steering unit (101) and a second hydraulic component (109) configured to change the hydraulic flow in the hydraulic steering unit (101). In order to provide an improved hydraulic steering system, the single hydraulic steering unit (101) further includes a second steering control device (105) for controlling the second hydraulic component (109) of the at least two hydraulic components (108, 109).

The forklift steering axle structure comprises an axle body, an oil cylinder assembly and two steering knuckles, the left end and the right end of the oil cylinder assembly are rotationally connected with the steering knuckles through connecting rods, the steering knuckles and the axle body are rotationally connected through main pin rods, and the outer surfaces of the steering knuckles are rotationally connected with wheel assemblies. Master pin seats are arranged at the upper end and the lower end of the master pin rod, first grease holes capable of injecting oil to the upper end and the lower end of the master pin rod are formed in the master pin seats, second grease holes capable of injecting oil to the side face of the master pin rod are formed in the steering knuckle, and hole plugs are detachably installed at openings of the first grease holes and the second grease holes. The two first grease holes and the second grease hole are formed, compared with the prior art, the number of the grease holes is increased, the structure of the main pin rod is improved, grease is conveniently injected into the main pin rod, the main pin rod can be fully lubricated, and the service life of the steering axle is prolonged.

The invention discloses a steering actuating device (1) for a vehicle, wherein the steering actuating device (1) comprises the following: - a hydraulic drive unit (2), - a conversion unit (3), - an output element (4) which is designed to impress an output torque or an output force onto a steering mechanism, wherein the hydraulic drive unit (2) is fluidically connected to the conversion unit (3) so that the hydraulic drive unit (2) can apply hydraulic pressure to the conversion unit (3), and wherein the conversion unit (3) has a piston (3.1) and a transmission unit (3.2), wherein the piston (3.1), when the hydraulic pressure is applied to it, introduces a piston force into the transmission unit (3.2), and the transmission unit (3.2) impresses the output torque or the output force onto the output element (4) in response to the piston force introduced. The invention also discloses a steering system and a vehicle.

The invention relates to a hydraulic steering system for steering a vehicle with a steering mechanism. The hydraulic steering system includes a hydraulic steering unit. A single hydraulic steering unit includes: two outlet ports configured to allow hydraulic fluid to be discharged from the hydraulic steering unit to a steering mechanism of the vehicle; at least two redundant hydraulic components configured to vary a hydraulic flow of the hydraulic fluid and fluidly connected to the outlet port; a first steering control device for controlling a first hydraulic component of the at least two hydraulic components and configured to vary a hydraulic flow in the hydraulic steering unit; and a second hydraulic component configured to vary a hydraulic flow in the hydraulic steering unit. In order to provide an improved hydraulic steering system, the single hydraulic steering unit further comprises second steering control means for controlling a second of the at least two hydraulic components.

An asphalt finisher is provided and includes a plurality of wheels including a steered wheel; a steering cylinder configured to adjust a steered angle of the steered wheel; a hydraulic pump configured to supply hydraulic oil to the steering cylinder; a proportional control valve disposed between the hydraulic pump and the steering cylinder, and configured to control a flow rate and a direction of the hydraulic oil supplied to the steering cylinder; and a controller configured to control the proportional control valve to control the steered angle.

The invention relates to a wide-angle steering full-hydraulic steering gear, and belongs to the technical field of steering gears. The problems that when an existing full-hydraulic steering gear adopts a sheet-type elastic piece, the turning angle between a valve element and a valve sleeve is small in the steering process, the flow speed of hydraulic oil is high, vehicle steering is sensitive, and impact vibration of a steering mechanism is likely to be caused are solved. The device comprises a conversion valve and a cycloid motor, wherein the conversion valve and the cycloid motor are connected into a whole through a separation disc; the conversion valve comprises a valve body, a valve element and a valve sleeve. The valve element is rotationally installed on the valve body through a bearing, and the connecting end of the valve element is connected with the steering column. The valve element is rotationally arranged in the valve sleeve in a sleeved mode and connected with a rotor of the cycloid motor through a coupler. A torsion type elastic piece is arranged between the valve element and the valve sleeve so that relative rotation between the valve element and the valve sleeve can be achieved. The rotating angle between the valve element and the valve sleeve is large, so that the flow speed of hydraulic oil is reduced, hydraulic flow impact vibration is small, a steering system buffer valve, a shock absorber and an energy accumulator can be omitted, and cost is saved.

A steering gear (1) for a vehicle (200) is disclosed, comprising: - a case (2); - a first and a second displacement element (10, 11); - a force-absorbing element (9); - an output interface (30), where the displacement elements (10, 11) are provided in an interior of the housing (2) and divide this into displacement chambers (3, 4, 5), wherein the displacement elements (10, 11) are displaceable, wherein the displacement elements (10, 11) each have force transmission elements (12, 13), wherein the force transmission elements (12, 13) are mechanically engaged with the force receiving element (9), wherein the force receiving element (9) is rotatable about a rotation axis (14) and is mechanically coupled to the output interface (30), wherein the steering gear (1) is designed such that the displacement elements (10, 11) can be moved into and / or out of at least one of the displacement chambers (3, 4, 5) by supplying and / or removing pressure medium, so that force effects are applied to the force receiving element (9) via the engagement between the force receiving element (9) and the force transmission elements (12, 13), wherein The force acting on the force receiving element (9) imposes a torque on the output interface (30) via the mechanical coupling of the force receiving element (9) with the output interface (30). Furthermore, a steering unit (50), an axle unit (100) and a vehicle (200) are disclosed.

An asphalt finisher is provided and includes a plurality of wheels including a steered wheel; a steering cylinder configured to adjust a steered angle of the steered wheel; a hydraulic pump configured to supply hydraulic oil to the steering cylinder; a proportional control valve disposed between the hydraulic pump and the steering cylinder, and configured to control a flow rate and a direction of the hydraulic oil supplied to the steering cylinder; and a controller configured to control the proportional control valve to control the steered angle.

The utility model discloses a non-equal wheel articulated tractor, which comprises a front frame, a rear frame, a power transmission system, a clutch control system, a steering system and an articulated mechanism, the front frame is articulated with the rear frame, the power transmission system is used for transmitting the power of an engine backwards to a gearbox so as to drive the tractor to walk or an agricultural implement to run, and the clutch control system is used for controlling the steering system. The clutch control system is used for controlling a clutch to transmit power of an engine or cut off power transmission, and when the steering system steers, first-stage front wheel steering is conducted firstly, then second-stage middle steering is conducted, and secondary steering is achieved. As the diameter of the front wheels is smaller than that of the rear wheels, the whole vehicle is low in height, good in trafficability and suitable for operation in greenhouses, and the driver view is good. The front axle is installed below the engine through the front axle bracket, the axle distance is shortened, the steering radius is further reduced, steering of the tractor is more flexible, field steering can be completed at a time, and operation efficiency is high.

A full-hydraulic steering system belongs to the technical field of automobile manufacturing and comprises a steering column assembly, a steering telescopic shaft, a steering transition shaft support assembly and a full-hydraulic steering gear which are sequentially connected, the steering transition shaft support assembly is fixedly arranged on a frame, and the steering telescopic shaft is added between the steering column assembly and the full-hydraulic steering gear. Extra acting force applied by a steering column to the transition shaft due to machining errors of cab mounting holes is eliminated, the problem that a steering wheel rotates or is heavy in steering is solved, the steering transition shaft support assembly is fixedly arranged on the frame, the steering transition shaft support assembly and the full-hydraulic steering gear can be split off line, operation is more convenient, and the steering efficiency is improved. In addition, the full-hydraulic steering gear does not need to be lifted along with a cab, the length of the steering hose can be conveniently controlled, the position of the steering hose can be conveniently arranged, cost is reduced, and the attractiveness of arrangement of the steering hose is improved.

The present invention relates to the technical field of vehicles, and discloses a vehicle steering system and a vehicle steering control method. The vehicle steering system includes a hydraulic steering gear, a dual-winding assist motor, and a hydraulic redundant assist unit. When the switching valve is in the first working state, the first assist oil pump provides high-pressure oil for the hydraulic steering gear, the second assist oil pump idles, and the dual-winding assist motor provides a first assist torque to the hydraulic steering gear. When the first assist oil pump fails, the switching valve can be switched from the first working state to the second working state through flow sensing. When the switching valve is in the second working state, the second assist oil pump provides high-pressure oil for the hydraulic steering gear, and the dual-winding assist motor provides a second assist torque to the hydraulic steering gear. The present invention can meet the requirements of heavy commercial vehicles for high steering safety under special working conditions. When the main hydraulic assist fails or the electric assist fails, the vehicle can still perform normal steering operations.

The invention relates to a steering wheel angle sensor for a full-hydraulic steering gear, and belongs to the technical field of sensors. The steering wheel angle sensor aims to solve the problems that an existing steering wheel angle sensor for a full-hydraulic steering gear is complex in structure, tedious in installation and low in sensing precision. The device comprises a mounting shell, a connecting shaft, a sensing unit and an electric control board, a mounting hole and an electric control board mounting position are integrally arranged on the mounting shell, the connecting shaft is rotatably mounted in the mounting hole, and the electric control board is mounted in the electric control board mounting position; the induction unit is of a non-contact induction structure and comprises an induction piece and an identification piece. The identification piece is installed on the connecting shaft, the induction piece is fixedly installed on the installation shell on the outer side of the connecting shaft, the induction end of the induction piece faces the identification piece in a non-contact mode, and the signal output end of the induction piece is electrically connected with the electric control board. The integrated structure is adopted, and the electric control board, the connecting shaft and the sensing unit are integrally installed on the installation shell, so that the rotation angle sensor is simple in structure, convenient to install and high in sensing precision.

A steering system (100) for a vehicle (200) is presented, comprising at least a first hydraulic pivoting device (110) which is mechanically connectable or connected to an actuating device for steering (210), at least one second hydraulic pivoting device (120) which is mechanically connectable or connected to at least one steerable wheel (222), two hydraulic circuits by means of which the first hydraulic pivoting device (110) and the at least one second hydraulic pivoting device (120) are connected to one another, and wherein the first hydraulic pivoting device (110) and the at least one second hydraulic pivoting device (120) are hydraulically coupled to one another in such a way that a pivoting movement acting on the first hydraulic pivoting device (110) is transmitted to the at least one second hydraulic pivoting device (120), wherein the steering system (100) has an adjusting device,to set the zero position of the steering control device (210) and / or the wheel to be steered (222).

The embodiment of the utility model relates to the technical field of vehicle manufacturing, and discloses a power-assisted steering gear and a vehicle. The power-assisted steering gear provided by the embodiment of the utility model comprises a shell provided with a first cooling port and a second cooling port; the core shaft is arranged in the shell and extends along the axial direction of the shell; the stator assembly is arranged on the inner wall surface of the shell; the rotor assembly is arranged outside the core shaft in a sleeving mode and drives the core shaft to move in the axial direction of the shell under driving of the stator assembly; the cooling cavity comprises a first cooling cavity and a second cooling cavity, the first cooling cavity is communicated with the first cooling opening, and the second cooling cavity is communicated with the second cooling opening; and the liquid supply container is connected between the first cooling cavity and the second cooling cavity through a first one-way loop and a second one-way loop. According to the power-assisted steering gear, cooling and heat dissipation can be achieved without extra power, the cooling structure is simple in design, the cooling effect is good, and the service life of the power-assisted steering gear can be prolonged.

A kit for connecting an output shaft of an electric motor to an input shaft of a steering gear of a steering system includes: a housing including: a central section having a first central section end and a second central section end, the central section defining an adapter assembly passage extending in a longitudinal direction between the first central section end and the second central section end, an electric motor bracket disposed on the first central section end, and a steering gear bracket disposed on the second central section end; and an adapter assembly having a first adapter assembly end and a second adapter assembly end. The adapter assembly is disposable in the adapter assembly passage such that the first adapter assembly end is connectable to the output shaft and the second adapter assembly end is connectable to the input shaft.

The present invention relates to a hydraulic steering system (100) for steering a vehicle with a steering mechanics (112). The hydraulic steering system (100) comprises a hydraulic steering unit (101). A single hydraulic steering unit (101) comprises two outlet ports (111) configured to allow hydraulic fluid to be discharged from the hydraulic steering unit (101) to the steering mechanics (112) of the vehicle, at least two redundant hydraulic components (108, 109) configured to change a hydraulic flow of the hydraulic fluid and to be fluidically connected to the outlet ports (111), a first steering control device (102) for controlling a first hydraulic component (108) of the at least two hydraulic components (108, 109) and configured to change the hydraulic flow in the hydraulic steering unit (101) and a second hydraulic component (109) configured to change the hydraulic flow in the hydraulic steering unit (101). In order to provide an improved hydraulic steering system, the single hydraulic steering unit (101) further comprises a second steering control device (105) for controlling the second hydraulic component (109) of the at least two hydraulic components (108, 109).

The invention relates to a steering module, a steering system and a vehicle, the steering module comprises a first connecting piece and a second connecting piece, the first connecting piece and the second connecting piece are rotationally connected, and the first end, away from the first connecting piece, of the second connecting piece is suitable for being connected with a steering knuckle connected with a steering wheel; the end, away from the second connecting piece, of the first connecting piece is suitable for being in transmission connection with a steering driving mechanism, the first connecting piece can rotate under the action of the steering driving mechanism, and the length of at least one of the first connecting piece and the second connecting piece can be changed. By using the steering module, the steering angle range of the steering wheel of the vehicle can be increased.

A steering system (10a, 10b) for a vehicle with two wheels individually steered by means of their own steering drives (12a, 12b) is characterized in that both steering drives (12a, 12b, 12c, 12d) each comprise a vehicle-side supported hydraulic element (20a, 20b), wherein the hydraulic elements (20a, 20b) can be hydraulically coupled to each other and a hydraulic coupling of the hydraulic elements (20a, 20b) results in a mechanical coupling of the two steering drives (12a, 12b).By integrating two interconnectable hydraulic elements into the respective steering drives (12a, 12b), it is possible either to functionally short-circuit the hydraulic elements (20a, 20b) and thus individually adjust the steering angles of both steered wheels, or to couple the hydraulic elements (20a, 20b) together and thus create a quasi-mechanical connection between the two steering drives (12a, 12b), thereby synchronizing the steering angles of the two steered wheels.

This invention proposes a dual-objective superspiral sliding mode control method for a volumetric speed-regulating electro-hydraulic steering system. The method includes: establishing a dynamic model considering nonlinearity and unknown disturbances, and transforming it into a state-space model through input-output linearization; designing a dual-objective controller for the steering angle and return port pressure of the superspiral sliding mode control system under a double-saturation function; constructing a self-adjusting factor for the proportion of multivariable principal terms in the model, and using a particle swarm optimization algorithm to optimize the control parameters, thereby completing the search for the optimal control gain and further reducing the strong chattering easily generated by the existence of high-order terms in the system state equation, and enhancing robustness; establishing an evaluation method for suppressing sliding mode chattering based on the actual change amplitude-frequency value of the sliding surface function, and verifying the effectiveness of the control method. This invention aims to achieve excellent dynamic performance, improve control accuracy, suppress chattering, and ensure rapid convergence in volumetric speed-regulating electro-hydraulic steering systems for heavy vehicles, ultimately achieving high-performance steering angle tracking control.

The utility model discloses a steering system of an articulated tractor. The steering system comprises a hydraulic oil tank, a constant flow pump, a steering gear, a middle left steering oil cylinder, a middle right steering oil cylinder, an electromagnetic valve and a front wheel steering oil cylinder, a constant-flow pump oil inlet pipe is arranged between the hydraulic oil tank and the constant-flow pump, an oil return pipe is arranged between the hydraulic oil tank and the steering gear, a high-pressure oil supply pipe is arranged between the constant-flow pump and the steering gear, and a left steering oil pipe and a right steering oil pipe are arranged between the steering gear and the electromagnetic valve. A front axle left steering oil pipe and a front axle right steering oil pipe are arranged between the electromagnetic valve and the front wheel steering oil cylinder, a middle left steering oil pipe is arranged between the electromagnetic valve and the middle left steering oil cylinder, and a middle right steering oil pipe is arranged between the electromagnetic valve and the middle right steering oil cylinder; a steering change-over switch is arranged on an instrument shell of the tractor. By pressing the steering change-over switch, the steering mechanism achieves the purpose of firstly steering the front wheel and then steering the middle part.

Disclosed is a steering device (1) for a vehicle, the steering device (1) comprising the following: a hydraulic drive unit (2); a conversion unit (3); the hydraulic drive unit (2) is fluidically connected to the conversion unit (3) in such a way that the hydraulic drive unit (2) can hydraulically apply a pressure to the conversion unit (3), the conversion unit (3) having a piston (3.1) and a transmission unit (3.2) which transmits the pressure to the conversion unit (3) when a hydraulic pressure is applied to the piston (3.1). The piston introduces a piston force into the transmission unit (3.2), and the transmission unit (3.2) applies an output torque or an output force to the output element (4) in response to the introduced piston force. A steering apparatus and a vehicle are also disclosed.

The present application relates to the technical field of centering cylinder, in particular to a welding riveting type limiting structure centering cylinder assembly, which comprises a cylinder body, a limiting ring, a left floating piston, a right floating piston and a piston rod for driving the left floating piston and the right floating piston to slide, the piston rod is slidably connected in the cylinder body, the cylinder body is provided with a left oil cavity and a right oil cavity which are in communication with each other, the left floating piston is slidably connected in the left oil cavity, the right floating piston is slidably connected in the right oil cavity, the diameter of the left oil cavity is smaller than that of the right oil cavity, a positioning step is formed at the connection of the left oil cavity and the right oil cavity, the limiting ring is located at the positioning step and is in interference fit with the cylinder body, and the limiting ring and the cylinder body are fixedly connected through a connecting piece. The limiting ring is connected with the cylinder body in the interference fit mode, and on this basis, the limiting ring and the cylinder body are fixed through the connecting piece, and the oil pressure of the left oil cavity and the right oil cavity cannot be directly applied to the connecting piece, thereby the problem that the connecting piece is failed or even broken due to long-term receiving of the oil pressure can be avoided.

A steering assembly system is provided having a steering actuator comprising a double rod end cylinder having: a cylinder barrel having a length, a first end with a first cap, and a second end with a second cap, and a first, second and third fluid port, each respectively in fluid communication with a first, second, and third chamber; a piston rod having a first rod end and a second rod end with a length extending therebetween, and the first rod end extending through the first cap and the second rod end extending through the second cap of the cylinder barrel; a first piston having a first dimension and mechanically secured at a point along the length of the main piston rod; a second piston having a second dimension larger than the first dimension of the first piston, and main piston rod extending through at least the length of the barrel.

This disclosure provides an asphalt finisher capable of improving the precision of steering angle control. [Solution] The asphalt finisher includes a plurality of wheels, including steering wheels, a steering cylinder 54 that adjusts the steering angle of the steering wheels, and a hydraulic pump 55 that supplies hydraulic fluid to the steering cylinder 54. The asphalt finisher also includes a proportional control valve 56p positioned between the hydraulic pump 55 and the steering cylinder 54, which controls the flow rate and direction of the hydraulic fluid supplied to the steering cylinder 54, and a controller that controls the steering angle by controlling the proportional control valve 56p.

A kit for connecting an output shaft of an electric motor to an input shaft of a steering gear of a steering system includes: a housing including: a central section having a first central section end and a second central section end, the central section defining an adapter assembly passage extending in a longitudinal direction between the first central section end and the second central section end, an electric motor bracket disposed on the first central section end, and a steering gear bracket disposed on the second central section end; and an adapter assembly having a first adapter assembly end and a second adapter assembly end. The adapter assembly is disposable in the adapter assembly passage such that the first adapter assembly end is connectable to the output shaft and the second adapter assembly end is connectable to the input shaft.

The present disclosure provides a steering system and an engineering vehicle. The steering system comprises: a steering mechanism comprising a steering bridge, a steering wheel and a steering cylinder, the steering cylinder being configured to drive the steering wheel to deflect left and right relative to the steering bridge; a steering control mechanism; a transmission mechanism configured to drive the steering wheel to deflect left and right relative to the steering bridge; a full hydraulic steering gear comprising a motor; and a steering mode switching device configured to switch the steering system between a first steering mode and a second steering mode, in the first steering mode, the steering control mechanism is in driving connection with the transmission mechanism, the transmission mechanism drives the steering wheel to deflect in response to a steering action of the steering control mechanism, in the second steering mode, the steering control mechanism is in driving connection with the motor, the motor supplies oil to the steering cylinder in response to the steering action of the steering control mechanism to drive the steering cylinder to deflect the steering wheel. The steering system and the engineering vehicle of the present disclosure can meet the steering requirements under different working conditions.

A smart steering kit for a legacy steering device for connecting an output shaft of an electric motor to an input shaft of a steering device of a steering system. The kit includes a housing and an adapter assembly having a first adapter assembly end and a second adapter assembly end. The housing includes: a central section having a first central section end and a second central section end, the central section defining an adapter assembly passage extending in a longitudinal direction between the first central section end and the second central section end; an electric motor bracket disposed on the first central section end; and the steering device bracket is arranged on the end part of the second central section. An adapter assembly can be disposed in the adapter assembly channel such that a first adapter assembly end can be connected to the output shaft and a second adapter assembly end can be connected to the input shaft.