Steering system and vehicle

Abstract

The utility model discloses a steering system and a vehicle, and relates to the technical field of vehicle steering. The steering system comprises a steering driving shaft, a driving piece and a lock-up clutch. The driving piece is configured to drive the steering driving shaft to move in the axial direction through a set of output wheels arranged on the steering driving shaft. The lock-up clutch comprises a friction ring, a transmission part and a plurality of movable parts, when the steering driving shaft moves in the axial direction, the transmission part rotates, the transmission part is provided with radial protrusions, the movable parts are arranged at intervals, and the radial protrusions are located between the adjacent movable parts; when the driving part outputs power in the forward direction, the multiple movable parts move inwards in the radial direction to be connected with the radial protrusions in a pressing mode, and therefore the transmission part is driven to rotate. When the steering driving shaft outputs power reversely, the movable piece abuts against the inner wall of the friction ring. According to the steering system, the position of the steering driving shaft can be locked through the lock-up clutch of a mechanical structure, the response speed is high, and reliability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle steering technical field especially relates to a kind of steering system and vehicle. BACKGROUND

[0002] With the development of modern intelligent driving technology and the improvement of road conditions, people's requirements for car comfort and handling are getting higher and higher, so that rear wheel steering technology has become a configuration favored by both car enterprises and consumers. The steering system uses motor as power and transmits power through ball screw structure to provide steering force for wheels. Since the ball screw structure does not have self-locking function, it is easy to cause the motor to be affected by the reverse force brought by the wheel, so it is necessary to set a locking clutch between the motor and the steering drive shaft.

[0003] In the prior art, the locking clutch mostly uses hydraulic piston to press the friction plate through hydraulic oil or generates magnetic force to press by energizing electromagnetic coil to play the locking role. However, the hydraulic piston needs time to build pressure, which leads to slow response speed and locking lag. Although the electromagnetic coil has fast response speed, long-term energization heating will cause magnetic force to decay, and under high load, it is easy to cause ablation, with poor reliability. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of steering system and vehicle, which can lock the position of steering drive shaft by locking clutch of mechanical structure, with fast response speed and high reliability.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A kind of steering system, comprising:

[0007] Steering drive shaft, the steering drive shaft is configured to drive wheel steering by axial movement;

[0008] Driving part, the driving part is configured to drive the steering drive shaft to move along the axial direction by a set of output wheel on the steering drive shaft;

[0009] Locking clutch, including friction ring, transmission part and multiple movable parts, the transmission part rotates when the steering drive shaft moves along the axial direction, the transmission part is provided with radial protrusion, each movable part is spaced apart, all movable parts are located in the friction ring and connected to the output wheel, the radial protrusion is located between adjacent movable parts;When the driving part outputs power in positive direction, multiple movable parts move radially inward to press the radial protrusion, to drive the transmission part to rotate;When the steering drive shaft outputs power in reverse direction, the movable part abuts against the inner wall of the friction ring to limit the rotation of the movable part relative to the friction ring.

[0010] As an alternative to the above-mentioned steering system, the locking clutch further comprises a connecting rod, each of the movable members is pivoted to the output wheel through the connecting rod.

[0011] As an alternative to the above-mentioned steering system, the connecting rod is pivoted to the output wheel through a first shaft, the connecting rod is pivoted to one of the movable members through a second shaft, and the first shaft is located at the inner side of the second shaft along the radial direction of the locking clutch.

[0012] As an alternative to the above-mentioned steering system, the locking clutch further comprises an elastic member, the elastic member is arranged between and connected to the two movable members pressing the radial protrusions, and the elastic member is configured to drive the two movable members to move away from each other.

[0013] As an alternative to the above-mentioned steering system, the output wheel is provided with a balance portion, the movable member is provided with a balance groove, and at least one end of the balance portion abuts against the corresponding inner wall of the balance groove along the circumferential direction of the locking clutch.

[0014] As an alternative to the above-mentioned steering system, the width of the balance groove gradually decreases in the direction of the radial direction of the locking clutch.

[0015] As an alternative to the above-mentioned steering system, the transmission member is provided with a plurality of radial protrusions, and each of the radial protrusions is located between adjacent transmission members.

[0016] As an alternative to the above-mentioned steering system, the steering drive shaft is provided with a threaded segment, the steering drive shaft is sleeved with a nut pair, the nut pair is threadedly connected with the threaded segment, the transmission member comprises a transmission portion and a connecting portion, the radial protrusion is protruded from the side wall of the transmission portion, and the connecting portion is sleeved with the outer periphery of the nut pair so that the transmission member is coaxially connected with the nut pair and synchronously rotates.

[0017] As an alternative to the above-mentioned steering system, the steering system further comprises a transmission assembly, the transmission assembly further comprises an input wheel and a transmission belt, the input wheel is in transmission connection with the driving member, and the transmission belt is sleeved with the outside of the input wheel and the output wheel.

[0018] A vehicle comprising two wheels and the above-mentioned steering system, the steering system is used for driving the two wheels to steer.

[0019] The beneficial effects of the present application are as follows:

[0020] The utility model provides a kind of steering system and vehicle.The steering system, when driving piece positive output power, drive output wheel rotates, output wheel will drive multiple movable pieces rotate along with, and make movable piece move inwards along radial in the process of rotation, to clamp the radial protrusion of transmission member, drive transmission member to rotate, further control steering drive shaft moves along self axial direction, pull wheel to realize steering;When wheel side is impacted by external force and generates reverse force, steering drive shaft reversely outputs power, transmission member rotates movable piece by radial protrusion, movable piece can abut on the inner wall of friction ring to limit movable piece relative to friction ring rotation, play locking effect, avoid reverse force to continue transmission.

[0021] The steering system can lock the position of the steering drive shaft through the mechanical structure of the locking clutch, has fast response speed and high reliability. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the structural schematic diagram of the steering system of an embodiment provided by the utility model;

[0023] Figure 2 It is the structural schematic diagram of the steering system of an embodiment provided by the utility model;

[0024] Figure 3 It is the structural schematic diagram of transmission assembly and locking clutch of an embodiment provided by the utility model;

[0025] Figure 4 It is the explosion drawing of transmission assembly and locking clutch of an embodiment provided by the utility model;

[0026] Figure 5 It is the sectional view of transmission assembly and locking clutch of an embodiment provided by the utility model;

[0027] Figure 6 It is the structural schematic diagram of movable piece of an embodiment provided by the utility model.

[0028] In the drawing:

[0029] 1, steering drive shaft;11, threaded section;

[0030] 2, shell;21, nut pair;22, locking ring;

[0031] 3, driving mechanism;31, driving piece;32, transmission assembly;321, input wheel;322, transmission belt;323, output wheel;3231, balance part;

[0032] 4, lock-up clutch; 41, friction ring; 42, transmission member; 421, transmission part; 422, connecting part; 423, radial protrusion; 43, movable member; 431, balance groove; 44, connecting rod; 45, first shaft; 46, second shaft;

[0033] 5, sensor;

[0034] 6, controller. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described below in detail, examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0036] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0037] Unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] Unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first feature and the second feature are in direct contact, or the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" of the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0039] The technical solutions of the utility model are further illustrated below in combination with the drawings and through specific embodiments.

[0040] With the development of modern intelligent driving technology and the improvement of road conditions, people have higher and higher requirements for the comfort and controllability of automobiles, which makes automobile manufacturers increase the research and development investment in automobile chassis. The embodiment provides a vehicle, which comprises a vehicle body and a steering system, the vehicle body is provided with wheels, and pull rods are rotatably connected to the two ends of the steering system, and each pull rod is rotatably connected to a wheel, and the steering system can control the wheels at the two ends to rotate in the same direction, thereby realizing the steering of the vehicle.

[0041] The rotatable connections between the steering mechanism and the pull rods and between the pull rods and the wheels can be realized by ball hinges or pin shafts, which provide the relative movement between the steering mechanism, the pull rods and the wheels with freedom and avoid being stuck.

[0042] It is worth noting that the steering system can be located at the front of the vehicle as a front wheel steering system, and the wheels correspond to the two front wheels of the vehicle, or the steering system can be located at the rear of the vehicle as a rear wheel steering system, and the wheels correspond to the two rear wheels of the vehicle. In the embodiment, the rear wheel steering system is taken as an example for illustration. Through the technology of the rear wheel steering system, the rotation of the front wheels in the front wheel steering system is driven by the steering wheel, and when the vehicle is at low speed or has insufficient steering, the rear wheels and the front wheels are controlled to rotate in opposite directions to reduce the turning radius and improve the flexibility of the vehicle; when the vehicle has the tendency of excessive steering, especially high-speed spin, the rear wheels and the front wheels rotate in the same direction to reduce the vehicle mass center side slip angle, reduce the steady-state overshoot of the vehicle yaw rate, and realize the effect of smooth lane changing.

[0043] As shown in Figure 1 and Figure 2 In the embodiment, the steering system comprises a steering drive shaft 1 and a shell 2, the steering drive shaft 1 is movably arranged in the shell 2 along the axial direction, the shell 2 is used for being fixedly connected with the vehicle body to ensure the stability of the steering system, and the two ends of the steering drive shaft 1 are connected with corresponding pull rods, the steering drive shaft 1 reciprocates along the axial direction, thereby driving the wheels to steer through the pull rods.

[0044] In order to accurately control the movement of the steering drive shaft 1, the steering system further comprises a driving mechanism 3, the driving mechanism 3 comprises a driving piece 31 and a transmission assembly 32, a nut pair 21 is arranged in the shell 2, a threaded section 11 is arranged on the steering drive shaft 1, the nut pair 21 is threadedly connected with the threaded section 11, and the driving piece 31 drives the nut pair 21 to rotate through the transmission assembly 32, thereby moving the steering drive shaft 1 along the axial direction.

[0045] In some embodiments, the driving member 31 is a driving motor, and the transmission assembly 32 comprises a plurality of transmission gears, one of which is sleeved on the output shaft of the driving motor, and one of which is sleeved on the steering driving shaft 1 and connected with the nut pair 21, thereby playing a role of power transmission.

[0046] In some embodiments, the nut pair 21 can be a ball screw nut pair or a planetary roller screw nut pair, and in other embodiments, the nut pair 21 can also be other forms of nut pairs as long as it can drive the steering driving shaft 1 to move reciprocatingly along the axial direction through the threaded section 11.

[0047] As shown in Figures 2 to 4 The transmission assembly 32 comprises an input wheel 321, a transmission belt 322 and an output wheel 323, the output wheel 323 is sleeved on the steering driving shaft 1 and connected with the nut pair 21 and can rotate synchronously, the input wheel 321 is in transmission connection with the driving member 31, and the transmission belt 322 is sleeved outside the input wheel 321 and the output wheel 323. The transmission belt 322 can transmit the power of the input wheel 321 to the output wheel 323, so that the driving motor can drive the nut pair 21 to rotate.

[0048] It is worth noting that the transmission belt 322 is a synchronous belt, the input wheel 321 and the output wheel 323 are both synchronous wheels, or the transmission assembly 32 further comprises a tensioning wheel abutting against the transmission belt 322 to tension the transmission belt 322, thereby avoiding the transmission belt 322 from slipping.

[0049] In order to better realize the steering function of the vehicle, the steering system further comprises a controller 6, the controller 6 is in electrical connection with the driving member 31, the controller 6 can send a control instruction to the driving member 31, and the driving member 31 drives the wheels to rotate at a suitable speed and angle according to the control instruction.

[0050] In the embodiment, the steering system further comprises a sensor 5, the sensor 5 is fixedly arranged on the housing 2 and in communication connection with the controller 6, and the sensor 5 is configured to detect the movement amount of the steering driving shaft 1, so that the sensor 5 can detect the angle of the wheel rotation in real time, ensure the structural safety of the angle of the wheel rotation and the control instruction sent by the controller 6, and also can control the motor to output a suitable torque according to the angle of the rear wheel steering, so as to inhibit the reverse force brought by the road wheel and avoid the interference of the rear wheel steering caused by the road impact.

[0051] It is worth mentioning that the steering system utilizes a ball screw structure for power transmission, which can improve transmission efficiency. However, the ball screw structure does not have a self-locking function, which can easily cause the motor to be affected by the reverse force from the wheels. Even if a locking clutch 4 is provided between the motor and the transmission assembly 32 for self-locking, in the case of a particularly large external force impact on the wheel side, the reverse force can easily cause the transmission assembly 32 to jump teeth or slip, increasing the risk of vehicle loss of control.

[0052] As shown in Figures 2 to 5 To solve the above problems, the steering system further includes a locking clutch 4, which is provided between the transmission assembly 32 and the nut pair 21. One end of the locking clutch 4 is in driving connection with the transmission assembly 32, and the other end of the locking clutch 4 is in driving connection with the nut pair 21. When the driving member 31 outputs power in the forward direction, the transmission assembly 32 drives the nut pair 21 to rotate through the locking clutch 4, and then drives the steering drive shaft 1 to move axially to realize the steering of the vehicle. When the wheel side is impacted by an external force to generate a reverse force, the steering drive shaft 1 outputs power in the reverse direction, the steering drive shaft 1 moves to drive the nut pair 21 to rotate, and the locking clutch 4 is locked.

[0053] Wherein, the driving member 31 outputs power in the forward direction refers to that the driving member 31 outputs power to the locking clutch 4 to generate torque, and the power is generated by the rotor assembly of the driving member 31. The steering drive shaft 1 outputs power in the reverse direction refers to that the steering drive shaft 1 outputs power to the locking clutch 4 to generate torque, and the power is generated by the impact force on the wheel side to drive the steering drive shaft 1 to move, and then drive the nut pair 21 to rotate. That is, the reverse force generated by the wheel side will not be transmitted to the transmission assembly 32 through the locking clutch 4, which can avoid the transmission assembly 32 from jumping teeth or slipping, so that the steering angle of the wheel is the same as the preset angle, and the risk of vehicle loss of control is reduced.

[0054] In the embodiment, the locking clutch 4 includes a friction ring 41, a transmission member 42, and a plurality of movable members 43. The friction ring 41 is fixedly provided in the housing 2. The transmission member 42 is coaxially connected with the nut pair 21 and rotates synchronously, that is, the transmission member 42 rotates when the steering drive shaft 1 moves axially. The transmission member 42 is provided with a radial protrusion 423. The movable members 43 are arranged in the friction ring 41 and spaced from each other. The radial protrusion 423 is located between adjacent movable members 43. When the driving member 31 outputs power in the forward direction, the movable members 43 move close to each other. When the steering drive shaft 1 outputs power in the reverse direction through the transmission member 42, the movable members 43 abut against the inner wall of the friction ring 41 to limit the rotation of the movable members 43 relative to the friction ring 41.

[0055] When the driving member 31 drives the output wheel 323 to rotate, the output wheel 323 drives the plurality of movable members 43 to rotate, and the movable members 43 are close to each other in the process of rotation, so as to clamp the radial protrusions 423 of the transmission member 42, drive the nut pair 21 to rotate through the transmission member 42, and then control the steering drive shaft 1 to move along the axial direction, pull the wheels to realize steering; when the wheels are impacted by the reverse force, the transmission member 42 pushes the movable members 43 through the radial protrusions 423, and the movable members 43 can abut against the inner wall of the friction ring 41 to play a locking role, so as to avoid the continuous transmission of the reverse force, and the response speed is fast and the reliability is high.

[0056] In the embodiment, the plurality of movable members 43 need to be close to each other along the radial direction of the clutch to clamp the radial protrusions 423 when the driving member 31 outputs power, and need to eccentrically rotate when the radial protrusions 423 generate power to the movable members 43. In order to achieve the above purpose, the locking clutch 4 further comprises a connecting rod 44, and each movable member 43 is pivoted with the output wheel 323 through the connecting rod 44. Due to the existence of the connecting rod 44, the degree of freedom of the movable member 43 is high, so that different actions can be generated for power input in different directions.

[0057] Specifically, the connecting rod 44 is pivoted with the output wheel 323 through a first shaft 45, and is pivoted with one movable member 43 through a second shaft 46. Along the radial direction of the locking clutch 4, the first shaft 45 is located inside the second shaft 46. When the output wheel 323 rotates as power input, the first shaft 45 pulls the connecting rod 44 to rotate, and at the same time, the connecting rod 44 drives the second shaft 46 to move inward, so as to drive the movable member 43 to move inward, and the plurality of movable members 43 can clamp the radial protrusions 423; when the nut pair 21 rotates as power input, the radial protrusions 423 abut against the movable members 43, and the abutting force is eccentric force, which can make the movable members 43 rotate around the second shaft 46, so as to make the movable members 43 abut against the friction ring 41, and play a locking role.

[0058] In the embodiment, the locking clutch 4 further comprises a resilient member (not shown in the figure), which is arranged between and connected with the two movable members 43 clamping the radial protrusions 423, and is configured to drive the two movable members 43 to move away from each other. The arrangement of the resilient member can improve the stability of the two movable members 43, so as to prevent the movable members 43 from deflecting when the two movable members 43 are not subjected to the force transmitted by the nut pair 21 through the radial protrusions 423, and ensure that the movable members 43 maintain a stable distance from the friction ring 41.

[0059] In addition, the transmission member 42 is provided with a plurality of radial protrusions 423, and each radial protrusion 423 is located between adjacent transmission members 42. The plurality of radial protrusions 423 are provided so that the transmission of the clutch internal force is stable and symmetrical regardless of the rotation direction of the transmission member 42 and the output wheel 323.

[0060] In order to ensure the balance of the plurality of movable members 43 in the clutch, the plurality of movable members 43 are symmetrical structures, and a plurality of elastic members are arranged between each adjacent two movable members 43 in the clutch, and the plurality of elastic members are the same, and the plurality of elastic members act on the plurality of movable members 43 together to make the force distribution of the plurality of movable members 43 uniform.

[0061] For example, when the driving member 31 is outputting power in the forward direction, at this time, the output wheel 323 has low speed and small torque, and the plurality of movable members 43 are stably close under the driving of the respective connecting rods 44, and the force between them is uniformly distributed in the circumferential direction, so that the plurality of movable members 43 jointly clamp the plurality of radial protrusions 423, thereby stably rotating the transmission member 42; when the transmission member 42 outputs power in the reverse direction, the plurality of radial protrusions 423 of the transmission member 42 respectively abut on one movable member 43 on one side, and the speed is high and the torque is high, at this time, the movable member 43 is subjected to a larger torque and rotates around the respective second shaft 46 to abut on the inner side of the friction ring 41, that is, the positions of the plurality of movable members 43 abutting on the inner side of the friction ring 41 are uniformly distributed in the circumferential direction of the clutch, which ensures that the clutch can stably output power and disperse load when subjected to a larger impact, ensures stability and improves service life.

[0062] As shown in Figures 4 to 6 The output wheel 323 is provided with a balance portion 3231, and the movable member 43 is provided with a balance groove 431, and at least one end of the balance portion 3231 abuts on the inner wall corresponding to the balance groove 431 in the circumferential direction of the locking clutch 4. By abutting the balance portion 3231 on the inner wall of the balance groove 431, the movable member 43 can provide a force to maintain the stability of the movable member 43 in the circumferential direction of the clutch when the movable member 43 is in a stable state, and the balance portion 3231 can also ensure that the movable member 43 rotates smoothly and approaches each other when the output wheel 323 rotates.

[0063] Preferably, both ends of the balance portion 3231 abut on the inner walls of the corresponding sides of the balance groove 431 to further improve the stability of the movable member 43.

[0064] Further, the width of the balance groove 431 gradually decreases in the direction of the radial inward of the lock clutch 4. That is to say, there is a large degree of freedom between the balance part 3231 and the balance groove 431, and the balance part 3231 only abuts against the balance groove 431 at both ends when the movable part 43 is in a stable state to further improve the stability of the movable part 43; when the transmission part 42 is powered, the balance part 3231 does not hinder the rotation of the movable part 43 around the second shaft 46, and thus does not affect the locking function of the lock clutch 4.

[0065] As shown in Figure 4 The transmission part 421 extends into the friction ring 41, so that the radial protrusion 423 can be located between the movable parts 43, and the connecting part 422 is sleeved on the outer periphery of the nut pair 21, which can make the force between them more uniform when transmitting torque, and can also ensure the coaxiality between the transmission part 42 and the nut pair 21.

[0066] Further, the surface of the nut pair 21 is provided with a limiting ring groove, and the limiting ring groove is provided with a locking ring 22, and the locking ring 22 partially protrudes from the surface of the nut pair 21. When the connecting part 422 is sleeved on the outer periphery of the nut pair 21, the connecting part 422 presses the locking ring 22 to ensure the stability of the connection between the transmission part 42 and the nut pair 21.

[0067] The above is only a preferred embodiment of the present application, and for those skilled in the art, according to the idea of the present application, the specific implementation and application range can be changed, and the content of the specification should not be understood as a limitation of the present application.

Claims

1. A steering system, characterized in that, include: Steering drive shaft (1), the steering drive shaft (1) is configured to drive the wheels to steer by axial movement; A drive member (31) is configured to drive the steering drive shaft (1) to move axially via an output wheel (323) mounted on the steering drive shaft (1); The locking clutch (4) includes a friction ring (41), a transmission member (42), and a plurality of movable members (43). When the steering drive shaft (1) moves axially, the transmission member (42) rotates. The transmission member (42) is provided with a radial protrusion (423). The movable members (43) are spaced apart from each other. All the movable members (43) are located on the friction ring (41) and connected to the output wheel (323). The radial protrusion (423) is located between adjacent movable members (43). When the drive member (31) outputs power in the forward direction, the plurality of movable members (43) move radially inward to press against the radial protrusion (423), thereby driving the transmission member (42) to rotate. When the steering drive shaft (1) outputs power in the reverse direction, the movable members (43) abut against the inner wall of the friction ring (41) to restrict the rotation of the movable members (43) relative to the friction ring (41).

2. The steering system according to claim 1, characterized in that, The lock-up clutch (4) also includes a connecting rod (44), and each of the moving parts (43) is pivotally connected to the output wheel (323) via the connecting rod (44).

3. The steering system according to claim 2, characterized in that, The connecting rod (44) is pivotally connected to the output wheel (323) via a first shaft (45), and the connecting rod (44) is pivotally connected to a movable member (43) via a second shaft (46). Along the radial direction of the lock-up clutch (4), the first shaft (45) is located inside the second shaft (46).

4. The steering system according to claim 2, characterized in that, The locking clutch (4) further includes an elastic element disposed between the two movable members (43) pressing against the radial protrusion (423) and connected to both movable members (43), the elastic element being configured to drive the two movable members (43) away from each other.

5. The steering system according to claim 4, characterized in that, The output wheel (323) is provided with a balancing part (3231), and the movable part (43) is provided with a balancing groove (431). Along the circumference of the locking clutch (4), at least one end of the balancing part (3231) abuts against the inner wall corresponding to the balancing groove (431).

6. The steering system according to claim 5, characterized in that, The width of the balance groove (431) gradually decreases in the radially inward direction along the locking clutch (4).

7. The steering system according to claim 1, characterized in that, The transmission member (42) is provided with a plurality of radial protrusions (423), and each radial protrusion (423) is located between adjacent transmission members (42).

8. The steering system according to claim 1, characterized in that, The steering drive shaft (1) is provided with a threaded section (11), and the steering drive shaft (1) is fitted with a nut pair (21), and the nut pair (21) is threadedly connected to the threaded section (11). The transmission component (42) includes a transmission part (421) and a connecting part (422). The radial protrusion (423) protrudes from the side wall of the transmission part (421), and the connecting part (422) is fitted around the outer periphery of the nut pair (21) so that the transmission component (42) and the nut pair (21) are coaxially connected and rotate synchronously.

9. The steering system according to claim 1, characterized in that, The steering system also includes a transmission assembly (32), which includes an input wheel (321) and a transmission belt (322). The input wheel (321) is connected to the drive member (31) and the transmission belt (322) is sleeved on the outside of the input wheel (321) and the output wheel (323).

10. A vehicle, characterized in that, It includes two wheels and a steering system as described in any one of claims 1 to 9, the steering system being used to drive the two wheels to steer.

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