Steering control device, steering control system and vehicle

Abstract

The utility model provides a steering control device, a steering control system and a vehicle, and belongs to the field of engineering machinery. The steering control device comprises a connecting piece and a pushing piece, the connecting piece comprises an annular threaded connecting part and an end connecting part located at one axial end of the threaded connecting part, the threaded connecting part is provided with an internal thread used for being matched with an external thread at the end of a reversing valve, and the pushing piece is arranged in the center of the end connecting part. And a connecting structure for relatively locking the pushing piece and the end connecting part after the pushing piece axially moves and pushes the valve core of the reversing valve is arranged between the pushing piece and the end connecting part. The steering control system comprises the steering control device. The vehicle comprises the steering control system. According to the utility model, the valve core of the reversing valve is manually pushed by the pushing piece so as to realize mode switching under the condition of power failure.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of engineering machinery, especially a kind of steering control device, steering control system and vehicle. BACKGROUND

[0002] In order to ensure that engineering vehicles have good adaptability to site, engineering vehicles are often configured with hydraulic control systems capable of realizing multi-mode steering.

[0003] The existing Chinese patent application for invention with authorization announcement No.CN11959604B discloses a multi-mode steering system, which comprises a steering gear, a first reversing valve and a second reversing valve connected with the steering gear through an oil circuit, the first reversing valve and the second reversing valve are respectively connected with front wheel hydraulic cylinders and rear wheel hydraulic cylinders, the first reversing valve and the second reversing valve are both three-position four-way electromagnetic valves, and the oil inlet of one of the first reversing valve and the second reversing valve is connected with the oil outlet of the other one.The multi-mode steering system has three modes of front wheel independent steering, rear wheel independent steering and four-wheel cooperative steering, wherein the first reversing valve is used to control the front wheel steering cylinder to work when the front wheel is independently steered, and the second reversing valve is in the middle position;the second reversing valve is used to control the rear wheel steering hydraulic cylinder to work when the rear wheel is independently steered, and the first reversing valve is in the middle position;the first reversing valve and the second reversing valve simultaneously control the front wheel steering cylinder and the rear wheel steering cylinder to work when the four wheels are cooperatively steered, at which time the front wheel steering cylinder and the rear wheel steering cylinder are connected in series.

[0004] The above-mentioned multi-mode steering system can also be used to control the bidirectional driving of engineering vehicles.Engineering vehicles capable of bidirectional driving have bidirectional driver's cabins, which are provided with rotary operation platforms, the driving direction can be changed after the rotary operation platforms are rotated by 180°, and the original front wheels of the engineering vehicles become rear wheels and the original rear wheels become front wheels after the driving direction is converted.In order to keep the driving habits of operators unchanged after the driving direction of the engineering vehicles is converted, the spool of the first reversing valve or the second reversing valve will change the direction of action when steering.

[0005] The normal work of the above-mentioned multi-mode steering system depends on the electric control system, and when the circuit of the electric control system fails and the spools of the first reversing valve and the second reversing valve cannot normally act, the multi-mode steering system will lose the steering function. UTILITY MODEL CONTENTS

[0006] One of the purposes of the utility model is to provide a steering control device to solve the technical problem that the reversing valve cannot realize normal mode switching and the vehicle cannot normally steer after power failure in the prior art.

[0007] One of the purposes of the utility model is to provide a steering control system to solve the above technical problems.

[0008] One of the purposes of the utility model is to provide a vehicle to solve the above technical problems.

[0009] To achieve the above object, the utility model provides a steering control device technical scheme is:

[0010] A steering control device, comprising a connecting piece and a pushing piece, the connecting piece comprises a threaded connecting part in the shape of a ring and an end connecting part located at one end of the threaded connecting part in the axial direction, the threaded connecting part is provided with an internal thread for cooperating with the external thread of the end part of the reversing valve, the pushing piece is arranged at the center of the end connecting part, and a connecting structure for locking the pushing piece and the end connecting part relative to each other after the axial movement of the pushing piece and the pushing of the valve core of the reversing valve is arranged between the pushing piece and the end connecting part.

[0011] As a further improvement, the connecting structure is a threaded structure, comprising an external thread arranged on the pushing piece and an internal thread arranged on the end connecting part.

[0012] As a further improvement, the pushing piece is a pushing bolt.

[0013] As a further improvement, the connecting piece further comprises a guide part for being sleeved on the reversing valve before the threaded connecting part is connected with the reversing valve, the guide part is located at one end of the threaded connecting part away from the end connecting part in the axial direction, and the inner diameter of the guide part is greater than or equal to the inner diameter of the threaded connecting part.

[0014] As a further improvement, the outer peripheral surface of the guide part is aligned with the outer peripheral surface of the threaded connecting part and constitutes a rotating operation peripheral surface.

[0015] As a further improvement, the inner diameter of the guide part is greater than the inner diameter of the threaded connecting part, and a gap is left between the inner peripheral surface of the guide part and the corresponding outer peripheral surface of the reversing valve during use.

[0016] As a further improvement, one end of the connecting piece away from the end connecting part in the axial direction is a limiting end for stopping and limiting the valve body of the reversing valve.

[0017] The beneficial effects are: the steering control device provided by the utility model belongs to an open-type invention and creation. The connecting piece in the steering control device can be installed on the external thread originally existing on the end part of the reversing valve through threads, then the valve core of the reversing valve is axially pushed by the pushing piece, the valve core is switched to the required station, finally the pushing piece and the connecting piece are locked by the connecting structure, so that the valve core can be kept in the switched station. The steering control device can realize the normal operation of the valve core of the reversing valve under the condition of power failure, ensure the normal steering of the vehicle, and has a simple structure and is convenient to install and operate.

[0018] The utility model provides a steering control system, including the steering gear and the reversing valve, at least one end of reversing valve is equipped with steering control device, steering control device includes the connecting piece and the pusher, the connecting piece includes the ring -like threaded connection part and the end connection part at the axial one end of threaded connection part, threaded connection part is equipped with the internal thread for with the end outer thread cooperation of reversing valve, the pusher is arranged in the center of end connection part, and the connecting structure for locking pusher and end connection part opposite after pusher axially moves and pushes the valve core of reversing valve is arranged between pusher and end connection part.

[0019] As further improvement, the connecting structure is a threaded structure, including an external thread provided on the pusher and an internal thread provided on the end connection part.

[0020] As further improvement, the pusher is a push bolt.

[0021] As further improvement, the connecting piece further comprises a guide portion for being sleeved on the reversing valve before the threaded connection portion is connected with the reversing valve, the guide portion is located at an end of the threaded connection portion axially away from the end connection portion, and an inner diameter of the guide portion is greater than or equal to an inner diameter of the threaded connection portion.

[0022] As further improvement, an outer peripheral surface of the guide portion is aligned with an outer peripheral surface of the threaded connection portion and constitutes a rotation operation peripheral surface.

[0023] As further improvement, the inner diameter of the guide portion is greater than the inner diameter of the threaded connection portion, and a gap is left between an inner peripheral surface of the guide portion and a corresponding outer peripheral surface of the reversing valve in use.

[0024] As further improvement, an end of the connecting piece axially away from the end connection portion is a limiting end for limiting the valve body of the reversing valve.

[0025] As further improvement, the reversing valve is provided with the steering control device at both ends.

[0026] The steering control system is an improvement over the prior art. The steering control device is configured with the steering control device, the connecting piece in the steering control device can be installed on the external thread originally provided at the end of the reversing valve through the thread, then the valve core of the reversing valve is axially pushed by the pusher, so that the valve core is switched to the required station, finally the pusher and the connecting piece are locked by the connecting structure, so that the valve core can be kept in the switched station. The steering control device can realize the normal operation of the valve core of the reversing valve under the condition of power failure, ensure the normal steering of the vehicle, and the structure is simple, easy to install and operate.

[0027] A vehicle comprises a vehicle body and a steering control system, the steering control system comprising a steering gear and a reversing valve, at least one end of the reversing valve being provided with a steering control device, the steering control device comprising a connecting piece and a pushing piece, the connecting piece comprising a circular annular threaded connecting portion and an end connecting portion located at an axial end of the threaded connecting portion, the threaded connecting portion being provided with an internal thread for cooperating with an external thread of an end portion of the reversing valve, the pushing piece being arranged at the center of the end connecting portion, and a connecting structure being arranged between the pushing piece and the end connecting portion for locking the pushing piece and the end connecting portion relative to each other after the pushing piece axially moves and pushes a valve core of the reversing valve.

[0028] As a further improvement, the connecting structure is a threaded structure comprising an external thread arranged on the pushing piece and an internal thread arranged on the end connecting portion.

[0029] As a further improvement, the pushing piece is a pushing bolt.

[0030] As a further improvement, the connecting piece further comprises a guide portion for being sleeved on the reversing valve before the threaded connecting portion is connected with the reversing valve, the guide portion being located at an end of the threaded connecting portion axially away from the end connecting portion, and an inner diameter of the guide portion being greater than or equal to an inner diameter of the threaded connecting portion.

[0031] As a further improvement, an outer peripheral surface of the guide portion is aligned with an outer peripheral surface of the threaded connecting portion and constitutes a rotation operation peripheral surface.

[0032] As a further improvement, the inner diameter of the guide portion is greater than the inner diameter of the threaded connecting portion, and a gap is left between an inner peripheral surface of the guide portion and a corresponding outer peripheral surface of the reversing valve in use.

[0033] As a further improvement, an end of the connecting piece axially away from the end connecting portion is a limiting end for limiting the valve body of the reversing valve.

[0034] As a further improvement, the reversing valve is provided with the steering control device at both ends.

[0035] The vehicle provided by the utility model is an improvement on the prior art. The steering control system in the vehicle is provided with a steering control device for the reversing valve. The connecting piece in the steering control device can be installed on the external thread originally present on the end portion of the reversing valve through screwing, and then the valve core of the reversing valve is axially pushed by the pushing piece, so that the valve core is switched to a required station. Finally, the pushing piece and the connecting piece are locked by the connecting structure, so that the valve core can be kept in the switched station. The steering control device can be used to realize the normal operation of the valve core of the reversing valve in the case of power failure, ensure the normal steering of the vehicle, and has a simple structure and is convenient to install and operate. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1Structure schematic view of embodiment 1 of the steering control system in the utility model;

[0037] Figure 2 Structure schematic view of four modes in the forward driving state of embodiment 1 of the steering control system in the utility model;

[0038] Figure 3 Structure schematic view of four modes in the reverse driving state of embodiment 1 of the steering control system in the utility model;

[0039] Figure 4 Structure schematic view of the steering control device and the reversing valve connection of embodiment 1 of the steering control system in the utility model;

[0040] Figure 5 Structure schematic view of the steering control device of embodiment 1 of the steering control system in the utility model.

[0041] Explanation of reference signs:

[0042] 1, oil tank; 2, oil pump; 3, steering gear; 4, front axle steering cylinder; 5, rear axle steering cylinder; 6, reversing valve; 61, first reversing valve; 62, second reversing valve; 7, steering control device; 71, connecting piece; 711, guide part; 712, threaded connection part; 713, end connection part; 714, step structure; 715, rotation operation peripheral surface; 716, limiting end; 72, push piece; 8, external interface; 9, safety valve; 10, steering wheel; 11, front steering axle; 12, rear steering axle. DETAILED DESCRIPTION

[0043] The utility model will be further described in detail in combination with embodiments.

[0044] To solve the problems in the prior art, the basic idea of the utility model is to manually push the valve core of the reversing valve by the push piece to realize mode switching in the case of power failure.

[0045] The specific embodiment 1 of the steering control system provided by the utility model:

[0046] Referring to the accompanying Figure 1 The steering control system comprises an oil tank 1, an oil pump 2, a steering gear 3, a front axle steering cylinder 4 for controlling the left and right steering of a front steering axle 11, a rear axle steering cylinder 5 for controlling the left and right steering of a rear steering axle 12, and a reversing valve 6, wherein the reversing valve 6 comprises a first reversing valve 61 for controlling the front axle steering cylinder 4 and a second reversing valve 62 for controlling the rear axle steering cylinder 5.

[0047] The oil pump 2 is used to supply oil to the steering gear 3, the steering gear 3 has two control interfaces, one of which is used for oil outlet and the other is used for oil return. The steering gear 3 is provided with a steering wheel 10, by which the oil outlet and oil return of the control interface of the steering gear 3 can be controlled, thereby realizing steering. The steering gear 3 is a prior art and will not be described here.

[0048] The first reversing valve 61 and the second reversing valve 62 are both three-position four-way electromagnetic valves, and each has a pressure oil port, an oil return port, an oil inlet port for connecting with an actuator and an oil outlet port. In this embodiment, the actuators are the front axle steering oil cylinder 4 and the rear axle steering oil cylinder 5. Taking the first reversing valve 61 and the front axle steering oil cylinder 4 as an example, the front axle steering oil cylinder 4 has two chambers, each of which is provided with a first oil cylinder interface and a second oil cylinder interface, and the first oil cylinder interface and the second oil cylinder interface are connected with the oil inlet port and the oil outlet port of the first reversing valve 61 respectively. When one of the oil inlet port and the oil outlet port is used for oil outlet and the other is used for oil inlet, one of the chambers of the front axle steering oil cylinder 4 is filled with oil and the other is drained, thereby controlling the movement of the piston in the cylinder body of the front axle steering oil cylinder 4, and further controlling the left and right steering of the front axle 11. The connection relationship between the second reversing valve 62 and the rear axle steering oil cylinder 5 is similar to that between the first reversing valve 61 and the front axle steering oil cylinder 4, and will not be described here.

[0049] The oil return ports of the first reversing valve 61 and the second reversing valve 62 are connected with each other, and the pressure oil ports of the first reversing valve 61 and the second reversing valve 62 are connected with the two control interfaces of the steering gear 3 respectively.

[0050] In this embodiment, the front axle steering oil cylinder 4 and the rear axle steering oil cylinder 5 are both bidirectional oil cylinders with two output rods. In other embodiments, the front axle steering oil cylinder 4 and the rear axle steering oil cylinder 5 can also be two independent unidirectional oil cylinders with one output rod. At this time, the oil outlet port of the first reversing valve 61 is connected with the rod cavities of the two front axle steering oil cylinders 4, and the oil inlet port of the first reversing valve 61 is connected with the rodless cavities of the two front axle steering oil cylinders 4. The oil outlet port of the second reversing valve 62 is connected with the rod cavities of the two rear axle steering oil cylinders 5, and the oil inlet port of the second reversing valve 62 is connected with the rodless cavities of the two rear axle steering oil cylinders 5.

[0051] An external interface 8 for connecting with an instrument is arranged on the oil circuit between the first reversing valve 61 and the front axle steering oil cylinder 4. After the instrument is connected, the external interface 8 can be connected with the oil circuit, and after the instrument is removed, the external interface 8 is automatically closed. The external interface 8 can also be arranged at other positions of the oil circuit, which will not be described here.

[0052] A safety oil circuit connected with the oil tank 1 is connected on the oil circuit between the oil pump 2 and the steering gear 3, and a safety valve 9 is arranged on the safety oil circuit.

[0053] The above structure can realize four working modes: front axle steering mode, rear axle steering mode, four-wheel steering mode, and four-wheel oblique driving mode.

[0054] When traveling in the forward direction, see Figure 2 In part (a) of the diagram, in front axle steering mode, the second directional valve 62 is in the neutral position, and one of the electromagnets in the first directional valve 61 is energized, causing the valve core of the first directional valve 61 to actuate, thereby opening the first directional valve 61. When the steering wheel 10 is turned counterclockwise, the pressurized oil flows out from one of the control ports of the steering gear 3, passes through the first directional valve 61, and enters the front axle steering cylinder 4, pushing the piston in the front axle steering cylinder 4 to move, thereby causing the front steering axle 11 to turn to one side. The pressurized oil flows through the second directional valve 62 and returns to the other control port of the steering gear 3, without passing through the rear axle steering cylinder 5. When the steering wheel 10 is turned clockwise, the flow direction of the pressurized oil is opposite to that when the steering wheel 10 is turned counterclockwise, which can cause the front steering axle 11 to turn to the other side, which will not be described in detail.

[0055] See Figure 2 In part (b) of the diagram, in rear axle steering mode, the first directional valve 61 is in the neutral position, and one of the electromagnets of the second directional valve 62 is energized, causing the valve core of the second directional valve 62 to actuate, thereby opening the second directional valve 62. When the steering wheel 10 is turned counterclockwise, the pressurized oil flows out from one of the control ports of the steering gear 3, passes through the first directional valve 61, and enters the second directional valve 62. Without passing through the front axle steering cylinder 4, the pressurized oil enters the rear axle steering cylinder 5 from the second directional valve 62, pushing the piston in the rear axle steering cylinder 5 to move, thereby causing the rear steering axle 12 to turn to one side. Finally, the pressurized oil flows back to the other control port of the steering gear 3. When the steering wheel 10 is turned clockwise, the flow direction of the pressurized oil is opposite to that when the steering wheel 10 is turned counterclockwise, which can cause the rear steering axle 12 to turn to the other side, which will not be described in detail.

[0056] See Figure 2 In part (c) of the diagram, in four-wheel steering mode, the valve cores in both the first reversing valve 61 and the second reversing valve 62 are activated, thus opening both valves. When the steering wheel 10 is turned counterclockwise, pressure flows out from one of the control ports of the steering gear 3. Since both the first and second reversing valves 61 and 62 are activated, the pressure passes sequentially through the front axle steering cylinder 4 and the rear axle steering cylinder 5, causing the piston rods in both cylinders to move. This, in turn, causes the front steering axle 11 and the rear steering axle 12 to turn, but in opposite directions. This allows the front and rear wheels to steer in coordination, reducing the vehicle's turning radius. When the steering wheel 10 is turned clockwise, the flow direction of the pressurized oil is opposite to that when the steering wheel 10 is turned counterclockwise, causing the front steering axle 11 and the rear steering axle 12 to turn to the other side, which will not be elaborated further.

[0057] See Figure 2 In part (d), the four-wheel sloping mode is similar to the four-wheel steering mode, except that in the four-wheel sloping mode, the front steering axle 11 and the rear steering axle 12 have the same steering direction, so that the vehicle can move diagonally instead of turning the vehicle.

[0058] This steering control system can also control the vehicle to drive in reverse. Specifically, the vehicle's rotary control panel is rotated 180° before driving. In this state, the front wheels become the rear wheels, and the rear wheels become the front wheels. However, if driving is performed in the original manner, the steering wheel 10 rotates in the same direction, but the vehicle's steering direction is reversed. Therefore, to ensure the vehicle can be driven in the same way as before the reverse driving mode, and to facilitate driving, the valve cores in the first and second reversing valves 61 and 62 need to move in the opposite direction to the reversing direction. In reverse driving mode, the steering control system includes... Figure 3 The front axle steering mode shown in section (a) is... Figure 3 The rear axle steering mode shown in section (b) is as follows: Figure 3 The four-wheel steering mode shown in section (c) and Figure 3 The four-wheel diagonal driving pattern shown in section (d) indicates the direction of vehicle travel, with the arrows pointing in the direction of travel.

[0059] The steering control system also includes a steering control unit 7, see Appendix Figure 4 and attached Figure 5 The steering control device 7 includes a connector 71 and a pusher 72.

[0060] The connector 71 includes a guide portion 711, a threaded connection portion 712, and an end connection portion 713 arranged axially in sequence. Both the guide portion 711 and the threaded connection portion 712 are annular structures. The end of the guide portion 711 away from the threaded connection portion 712 is open, so as to be fitted onto the corresponding end connection portion 713 of the directional valve 6 to close the corresponding end of the connector 71. The inner side of the threaded connection portion 712 is provided with an internal thread for engaging with the external thread of the end of the directional valve 6, so that the connector 71 is fixedly installed on the directional valve.

[0061] Before the connecting piece 71 is connected with the reversing valve 6 by screwing, the guide part 711 is sleeved on the reversing valve 6, which can play a guiding role, so as to facilitate the accurate cooperation of the threaded connection part 712 with the external thread on the reversing valve, and improve the operation convenience. The inner diameter of the guide part 711 is larger than the inner diameter of the threaded connection part 712, so that a step structure 714 is formed between the guide part 711 and the threaded connection part 712. On the one hand, the step structure 714 can facilitate the processing of the thread at the threaded connection part 712, and on the other hand, the inner diameter of the guide part 711 is relatively large, so as to facilitate the gap between the inner periphery of the guide part 711 and the outer periphery of the corresponding position of the reversing valve 6. The gap can facilitate the sleeving of the guide part 711 on the reversing valve, and improve the operation convenience.

[0062] The outer periphery of the guide part 711 is aligned with the outer periphery of the threaded connection part 712 and constitutes a rotating operation periphery 715, so as to facilitate the installation of the connecting piece 71 on the reversing valve by the operator holding the connecting piece 71. The guide part 711 not only plays a guiding role, but also increases the area of the rotating operation periphery 715, which further facilitates the operation of the operator.

[0063] After the connecting piece 71 is installed on the reversing valve, one end of the connecting piece 71 away from the end connection part 713 can be in abutting pressure cooperation with the corresponding step surface on the reversing valve 6, so as to realize the stop and limiting during the installation of the connecting piece 71. Therefore, the one end of the connecting piece 71 away from the end connection part 713 is a limiting end 716 for stop and limiting with the valve body of the reversing valve 6.

[0064] The pushing piece 72 is arranged at the center of the end connection part 713, and a connecting structure for locking the pushing piece 72 relative to the end connection part 713 after the pushing piece 72 moves axially and pushes the valve core of the reversing valve 6 is arranged between the pushing piece 72 and the end connection part 713. In the embodiment, the connecting structure is a threaded structure, which includes an external thread arranged on the pushing piece 72 and an internal thread arranged on the end connection part 713. The operator rotates the pushing piece 72 to move the pushing piece 72 along the axial direction. After the pushing piece 72 pushes the valve core of the reversing valve 6, the pushing piece 72 will remain in place due to the self-locking of the threaded structure, so as to realize the relative locking with the end connection part 713. The pushing piece 72 can be a threaded rod, or a pushing bolt can be used.

[0065] The end of the reversing valve 6 is generally provided with a protective cover for protecting the valve core, and the protective cover is provided with an internal thread, and the protective cover can be installed on the end of the reversing valve through the internal thread matched with the external thread of the end of the reversing valve. The steering control device 7 in the utility model can replace the original protective cover of the reversing valve, which can protect the valve core on one hand, and when the valve core of the reversing valve cannot normally act through the electric control due to the circuit failure, the valve core of the reversing valve can be pushed by manually rotating the pushing piece 72 of the steering control device 7, so that the valve core of the reversing valve completes the corresponding action, and the steering control system is manually switched to the required mode.

[0066] When in use, the steering control device 7 can be installed at one end of the reversing valve, at this time, the steering control device 7 can only control the reversing valve to switch from the neutral position to one working position, if it is required to control the reversing valve 6 to switch from the neutral position to another working position, the steering control device 7 on the reversing valve needs to be installed at the other end of the reversing valve 6. In addition, the steering control device 7 can also be installed at both ends of the reversing valve 6, at this time, the pushing piece 72 on the two steering control devices 7 can be controlled to make the reversing valve 6 switch from the neutral position to any one of the remaining two working positions.

[0067] The specific embodiment 2 of the steering control system provided by the utility model is as follows:

[0068] The specific embodiment 2 is based on the specific embodiment 1, and the difference between the specific embodiment 2 and the specific embodiment 1 lies in that the connecting structure in the specific embodiment 2 is a jackscrew.

[0069] In the specific embodiment 2, the center position of the end connecting part 713 is provided with a light hole for the pushing piece 72 to pass through, the end connecting part 713 is provided with a threaded hole in the radial direction, the threaded hole is communicated with the light hole, the axis of the threaded hole is perpendicular to the axis of the light hole, and the jackscrew is installed in the threaded hole. The pushing piece 72 is axially moved by the manual pushing of the operator to push the valve core of the reversing valve, the jackscrew is tightened after the pushing operation is completed, and the relative locking of the pushing piece 72 and the end connecting part 713 is realized by the pressure of the jackscrew on the pushing piece 72.

[0070] The specific embodiment 3 of the steering control system provided by the utility model is as follows:

[0071] The specific embodiment 3 is based on the specific embodiment 1, and the difference between the specific embodiment 3 and the specific embodiment 1 lies in that the specific embodiment 3 does not provide the guide part.

[0072] The specific embodiment 4 of the steering control system provided by the utility model is as follows:

[0073] The specific embodiment 4 is based on the specific embodiment 1, and the difference between the specific embodiment 4 and the specific embodiment 1 lies in that the inner diameter of the guide part in the specific embodiment 4 is equal to the inner diameter of the threaded connecting part.

[0074] The specific embodiment 5 of the steering control system provided by the utility model is as follows:

[0075] This embodiment is based on embodiment 1, and the difference from embodiment 1 is that the outer diameter of the guide part in this embodiment is also greater than the outer diameter of the threaded connection part.

[0076] The specific embodiment of the steering control device provided by the utility model:

[0077] The steering control device is the steering control device in any one of embodiments 1-5 of the above steering control system, and will not be described here.

[0078] The specific embodiment of the vehicle provided by the utility model:

[0079] The vehicle includes a vehicle body and a steering control system mounted on the vehicle body, and the steering control system is the steering control system in any one of embodiments 1-5 of the above steering control system, and will not be described here.

[0080] Finally, it needs to be pointed out that the above-mentioned is only the preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing embodiments without paying the creative labor, or make equivalent replacement to part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A steering control device characterized by, The connecting piece comprises a circular threaded connecting portion and an end connecting portion at one axial end of the threaded connecting portion, the threaded connecting portion is provided with an internal thread for cooperating with an external thread of an end portion of the reversing valve, and the pushing piece is arranged at the center of the end connecting portion, and a connecting structure for locking the pushing piece and the end connecting portion relative to each other after the pushing piece axially moves and pushes the spool of the reversing valve is arranged between the pushing piece and the end connecting portion.

2. The steering control device according to claim 1, characterized by The connecting structure is a threaded structure, comprising an external thread arranged on the pushing piece and an internal thread arranged on the end connecting portion.

3. The steering control device according to claim 2, characterized by The pushing piece is a pushing bolt.

4. The steering control device according to any one of claims 1 to 3, characterized by The connecting piece further comprises a guide portion for being sleeved on the reversing valve before the threaded connecting portion is connected with the reversing valve, the guide portion is located at one end of the threaded connecting portion axially away from the end connecting portion, and an inner diameter of the guide portion is greater than or equal to an inner diameter of the threaded connecting portion.

5. The steering control device according to claim 4, characterized by An outer peripheral surface of the guide portion is aligned with an outer peripheral surface of the threaded connecting portion and constitutes a rotation operation peripheral surface.

6. The steering control device according to claim 4, characterized by The inner diameter of the guide portion is greater than the inner diameter of the threaded connecting portion, and a gap is left between an inner peripheral surface of the guide portion and a corresponding outer peripheral surface of the reversing valve during use.

7. The steering control device according to any one of claims 1 to 3, characterized by An end of the connecting piece axially away from the end connecting portion is a limiting end for limiting and stopping the valve body of the reversing valve.

8. A steering control system comprising a steering gear and a reversing valve, at least one end of the reversing valve being provided with a steering control device, characterized in that, The steering control device is the steering control device according to any one of claims 1-7.

9. The steering control system according to claim 8, characterized by, The reversing valve is provided with the steering control device at both ends.

10. A vehicle comprising a vehicle body and a steering control system, characterized by, The steering control system is the steering control system according to claim 8 or 9.

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