Steering gear and vehicle

Abstract

The utility model discloses a steering gear and a vehicle, the steering gear comprises a shell, a driving assembly, a moving part, a rotating part, a first bearing and a second bearing, the moving part is arranged in the shell, the moving part is in transmission connection with the rotating part, and the driving assembly is suitable for driving the rotating part to enable the moving part to move; the first bearing is arranged between the moving part and the shell; and the second bearing is arranged between the rotating piece and the shell. According to the steering gear, the moving part is supported by the first bearing, the rotating part is supported by the second bearing, the overall structural strength of the steering gear is guaranteed, the risk of breakage of the moving part is reduced, and the moving part can achieve a long displacement stroke.

Description

Technical Field

[0001] The utility model relates to the field of vehicles, and in particular to a steering gear and a vehicle. Background Art

[0002] In related technologies, a steering gear usually drives the wheels to deflect by the movement of a lead screw. However, due to the structure of the steering gear and the stiffness of the lead screw itself in related technologies, the movement range of the lead screw is limited. If the movement distance of the lead screw is too large, the lead screw is likely to break. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a steering gear. By supporting a moving part with a first bearing and a rotating part with a second bearing, the overall structural strength of the steering gear is ensured, the risk of the moving part breaking is reduced, and the moving part can achieve a longer displacement stroke.

[0004] The utility model also provides a vehicle including the above steering gear.

[0005] The steering gear according to an embodiment of the utility model includes: a housing, a driving assembly, a moving part, a rotating part, a first bearing and a second bearing. The moving part is arranged in the housing, the moving part is in transmission connection with the rotating part, and the driving assembly is adapted to drive the rotating part to move the moving part; the first bearing is arranged between the moving part and the housing; the second bearing is arranged between the rotating part and the housing.

[0006] For the steering gear according to an embodiment of the utility model, the driving assembly can drive the rotating part to rotate, and the rotating part can drive the moving part to move to drive the wheels to deflect; through the first bearing between the moving part and the housing, the wear between the moving part and the housing is avoided, and the service life of the moving part and the housing is prolonged. Through the second bearing between the rotating part and the housing, the wear between the rotating part and the housing is avoided, and the service life of the rotating part and the housing is prolonged; the stability of the movement of the moving part is improved through the first bearing, and the stability of the rotation of the rotating part is improved through the second bearing; by supporting the moving part with the first bearing and the rotating part with the second bearing, the overall structural strength of the steering gear is ensured, the moving part can achieve a longer displacement stroke, the possibility of breakage during the process of the steering gear achieving a longer displacement stroke is reduced, and the reliability of the operation of the steering gear is ensured.

[0007] In some embodiments, the steering gear is adapted to be connected to a cross beam of a subframe.

[0008] In some embodiments, the steering gear further includes a third bearing, the third bearing is arranged between the rotating part and the housing, and in the axial direction of the moving part, the second bearing and the third bearing are arranged at intervals.

[0009] In some embodiments, the driving assembly includes an output end, the output end is connected to the rotating member to drive the rotating member to rotate, and the second bearing and the third bearing are distributed on both sides of the output end.

[0010] In some embodiments, the driving assembly includes: a driving motor and a belt pulley, the belt pulley is disposed on the rotating member, the driving motor is in transmission connection with the belt pulley, and the belt pulley forms the output end.

[0011] In some embodiments, in the axial direction of the moving member, the first bearing is located at an end of the second bearing away from the output end.

[0012] In some embodiments, the distance from the first bearing to the second bearing is greater than the distance from the second bearing to the third bearing.

[0013] In some embodiments, the housing is provided with a receiving cavity, and the moving member is disposed in the receiving cavity.

[0014] In some embodiments, the housing includes a main body and a protruding portion. In the axial direction of the moving member, the protruding portion is located at an end of the main body away from the rotating member. The moving member penetrates through the protruding portion, and at least a part of the first bearing is located between the moving member and the protruding portion.

[0015] In some embodiments, a part of the first bearing is located between the moving member and the protruding portion, and another part is located between the moving member and the main body.

[0016] In some embodiments, the moving member is configured as a lead screw, the rotating member is configured as a nut, and the nut is sleeved outside the lead screw.

[0017] In some embodiments, the lead screw includes a transmission section and a connection section. The transmission section cooperates with the nut, and the connection section is adapted to be connected to a joint fork.

[0018] In some embodiments, the diameter of the transmission section is smaller than the diameter of the connection section.

[0019] In some embodiments, the lead screw further includes a transition section. One end of the transition section is connected to the transmission section, and the other end of the transition section is connected to the connection section.

[0020] In some embodiments, the diameter of the transition section is greater than the diameter of the transmission section and the diameter of the transition section is smaller than the diameter of the connection section.

[0021] In some embodiments, the length of the connection section is smaller than the length of the transmission section.

[0022] In some embodiments, the length of the transition section is less than the length of the connection section.

[0023] In some embodiments, the second bearing is an angular contact ball bearing. A first limiting member is provided on the rotating member, and a second limiting member is provided on the housing. The first limiting member and the second limiting member respectively abut against two sides of the second bearing to limit the movement of the second bearing.

[0024] In some embodiments, the moving member is provided with a third limiting member, and the third limiting member is slidably engaged with the housing to limit the circumferential movement of the moving member.

[0025] In some embodiments, the housing is provided with a guiding structure extending along the axial direction of the moving member. One end of the third limiting member is fixedly connected to the moving member, and the other end of the third limiting member is engaged with the guiding structure.

[0026] In some embodiments, the steering gear further includes a displacement sensor. The third limiting member is provided with a sensing member, and the displacement sensor is electromagnetically engaged with the sensing member to detect the displacement of the moving member.

[0027] In some embodiments, the moving member is configured as a lead screw, and the rotating member is configured as a nut. The lead screw includes a transmission section, a transition section, and a connection section. The transmission section is engaged with the nut, the connection section is adapted to be connected to the joint fork, the transmission section is connected to the connection section through the transition section, and the third limiting member is provided on the transition section.

[0028] In some embodiments, a first mounting portion is provided on the outer peripheral wall of the housing, and the first mounting portion is adapted to be fixed to the subframe of the vehicle.

[0029] In some embodiments, there are a plurality of the first mounting portions, and some of the plurality of first mounting portions are arranged at intervals along the axial direction of the moving member.

[0030] In some embodiments, there are three first mounting portions, and the three first mounting portions are arranged in a triangular shape.

[0031] In some embodiments, the steering gear further includes a displacement sensor. The displacement sensor is provided on the housing, and the displacement sensor is used to detect the displacement of the moving member; there are three first mounting portions, one of the first mounting portions and the displacement sensor are on the same side of the housing, and the other two first mounting portions are both on the side of the housing away from the displacement sensor.

[0032] In some embodiments, a second mounting portion is provided at one end of the moving member away from the rotating member, and the second mounting portion is adapted to be connected to a steering knuckle of a vehicle.

[0033] A vehicle according to an embodiment of the present invention includes a subframe and a steering gear. The steering gear is the steering gear described in the above technical solution, and the steering gear is mounted on a cross beam of the subframe.

[0034] In some embodiments, there are multiple steering gears including a left rear steering gear and a right rear steering gear, and both the left rear steering gear and the right rear steering gear are connected to the cross beam of the subframe.

[0035] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0036] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0037] Figure 1 is a schematic diagram of a steering gear according to an embodiment of the present invention;

[0038] Figure 2 is a cross-sectional view of a partial structure of the steering gear;

[0039] Figure 3 is Figure 2 an enlarged view of part A in

[0040] Figure 4 is a schematic diagram of a third limiting member;

[0041] Figure 5 is a schematic diagram of a partial structure of a vehicle according to an embodiment of the present invention Figure 1 ;

[0042] Figure 6 is a schematic diagram of a partial structure of a vehicle according to an embodiment of the present invention Figure 2 ;

[0043] Figure 7 is a schematic diagram of the cooperation between the moving member and the third limiting member.

[0044] Reference numerals: 100, steering gear; 101, left rear steering gear; 102, right rear steering gear; 200, vehicle; 210, left rear brake; 220, right rear brake; 230, rear control arm; 240, subframe; 250, rear wheel; 1, housing; 11, main body; 111, protrusion; 12, cover body; 13, first mounting portion; 131, mounting ear; 1311, mounting hole; 14, second mounting portion; 141, joint fork; 15, second limiting member; 16, second limiting groove; 17, mounting groove; 18, sliding groove; 19, accommodating cavity; 2, moving member; 21, first bearing; 23, third limiting member; 24, sensing member; 25, transmission section; 26, transition section; 27, connecting section; 3, rotating member; 31, second bearing; 311, outer ring; 312, inner ring; 313, mating ball; 32, third bearing; 33, first limiting member; 34, first limiting groove; 4, drive assembly; 40, output end; 41, drive motor; 42, synchronous belt; 43, second pulley; 5, displacement sensor; 6, dust cover; 61, clamp. Detailed implementation mode

[0045] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. 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 invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0047] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0048] Reference is made below to Figures 1 - 7 describe the steering gear 100 according to an embodiment of the present utility model.

[0049] Refer to Figure 1 、 Figure 2 and Figure 3 According to an embodiment of the present utility model, the steering gear 100 includes: a housing 1, a moving member 2, a rotating member 3, and a driving assembly 4. The moving member 2 is disposed in the housing 1, the moving member 2 is in transmission connection with the rotating member 3, and the driving assembly 4 is adapted to drive the rotating member 3 to move the moving member 2. The moving member 2 is adapted to be connected to a brake of the vehicle 200. When the wheels need to be deflected, the driving assembly 4 drives the rotating member 3 to rotate, the rotating member 3 drives the moving member 2 to move, and the moving member 2 drives the brake to move, thereby driving the wheels to deflect.

[0050] The steering gear 100 in the embodiment of the present utility model further includes: a first bearing 21 and a second bearing 31. The first bearing 21 is disposed between the moving member 2 and the housing 1, and the second bearing 31 is disposed between the rotating member 3 and the housing 1.

[0051] According to an embodiment of the present utility model, the housing 1 supports the moving member 2 through the first bearing 21, reducing the friction between the moving member 2 and the housing 1, extending the service lives of the moving member 2 and the housing 1, and the first bearing 21 can also bear radial loads, ensuring the coaxiality during the movement of the moving member 2 and improving the stability of the movement of the moving member 2; the housing 1 supports the rotating member 3 through the second bearing 31, reducing the friction between the rotating member 3 and the housing 1, extending the service lives of the rotating member 3 and the housing 1, and the second bearing 31 can also bear axial loads and radial loads, improving the stability and smoothness when the rotating member 3 rotates; by providing the first bearing 21 and the second bearing 31 inside the housing, the overall structural stability of the steering gear 100 is improved, the overall force on the moving member is more balanced, and the risk of the moving member breaking is reduced.

[0052] In some specific embodiments, the steering gear 100 includes: a housing 1, a moving member 2, a rotating member 3, and a driving assembly 4. The moving member 2 is movably disposed within the housing 1 and at least partially extends out of the housing 1 so as to facilitate the connection of the moving member 2 with the brake. The rotating member 3 is rotatably disposed within the housing 1 and is in threaded driving cooperation with the moving member 2 for driving the moving member 2 to move, and the driving assembly 4 is connected to the rotating member 3 for driving the rotating member 3 to rotate. In the embodiments of the present utility model, the rotating member 3 is in threaded driving cooperation with the moving member 2, with stable transmission, improving the reliability of the operation of the steering gear 100.

[0053] Referring to Figure 2 and Figure 3 , in some further embodiments, a plurality of bearings are provided between the rotating member 3 and the housing 1, that is to say, in addition to the second bearing 31 provided between the rotating member 3 and the housing 1, other bearings are also provided, and the plurality of bearings are spaced apart. By jointly supporting the rotating member 3 with the plurality of bearings, the stability of the rotating member 3 is further increased, and the stability of the operation of the steering gear 100 is further improved.

[0054] In some further embodiments, a plurality of bearings are provided between the moving member 2 and the housing 1, that is to say, in addition to the first bearing 21 provided between the moving member 2 and the housing 1, other bearings are also provided, and the plurality of bearings are spaced apart. By jointly supporting the moving member 2 with the plurality of bearings, the stability of the moving member 2 is further increased, and the stability of the operation of the steering gear 100 is further improved.

[0055] Referring to Figure 2 and Figure 3 , in some specific embodiments, a first bearing 21 is provided between the moving member 2 and the housing 1, a second bearing 31 and a third bearing 32 are provided between the rotating member 3 and the housing 1, and in the axial direction of the moving member 2, the second bearing 31 and the third bearing 32 are spaced apart.

[0056] In the embodiments of the present utility model, by jointly supporting the moving member 2 and the rotating member 3 with three bearings, while ensuring the transmission reliability of the rotating member 3 and the moving member 2, the cost of the steering gear 100 is also reduced.

[0057] In some further embodiments, the driving assembly 4 includes a rotatable output end 40, and the output end 40 is connected to the rotating member 3 to drive the rotating member 3 to rotate, and the second bearing 31 and the third bearing 32 are distributed on both sides of the output end 40.

[0058] In the embodiments of the present utility model, the second bearing 31 and the third bearing 32 jointly support the rotating member 3, and the output end 40 drives the rotating member 3 to rotate at a position between the second bearing 31 and the third bearing 32, so that the overall force on the rotating member 3 is more balanced, reducing the local stress, and further improving the stability of the rotating member 3.

[0059] Reference Figure 1 、 Figure 2 and Figure 3 In some specific embodiments, the driving assembly 4 includes a driving motor 41. A first pulley is provided on the output shaft of the driving motor 41, and a second pulley 43 is provided on the rotating member 3. The first pulley and the second pulley 43 are drivingly connected by a synchronous belt 42. In the embodiments of the present invention, the second pulley 43 forms the output end 40 of the above-mentioned driving assembly 4. In the embodiments of the present invention, the structure of the driving assembly is simple, reducing the cost of the steering gear.

[0060] In some other embodiments, the driving assembly 4 includes a driving motor 41. A first gear is provided on the output shaft of the driving motor 41, and a second gear is provided on the rotating member 3. The first gear and the second gear are meshed and cooperated. In the embodiments of the present invention, the second gear forms the output end of the above-mentioned driving assembly 4.

[0061] In other embodiments, the driving assembly 4 may be that the driving motor 41 drives the rotating member 3 to rotate through a worm and worm gear, a link assembly, etc., as long as the driving assembly 4 can drive the rotating member 3 to rotate. The present invention does not limit this.

[0062] In some further embodiments, in the axial direction of the moving member 2, the first bearing 21 is located at one end of the second bearing 31 away from the output end 40.

[0063] In the embodiments of the present invention, the first bearing 21, the second bearing 31 and the third bearing 32 are spaced apart in the axial direction of the moving member 2. The first bearing 21, the second bearing 31 and the third bearing 32 jointly support the moving member 2 and the rotating member 3, effectively improving the stability of the internal structure of the steering gear 100, further reducing the risk of fracture of the moving member 2, and ensuring the reliability of the operation of the steering gear 100.

[0064] In some further embodiments, the distance from the first bearing 21 to the second bearing 31 is greater than the distance from the second bearing 31 to the third bearing 32.

[0065] The second bearing 31 and the third bearing 32 are distributed at both ends of the rotating member 3. The second bearing 31 and the third bearing 32 jointly support the rotating member 3. The rotating member 3 is drivingly connected to the moving member 2 and plays a role in supporting the moving member 2. The first bearing 21 also plays a role in supporting the moving member 2.

[0066] In the embodiments of the present application, the distance from the first bearing 21 to the second bearing 31 is greater than the distance from the second bearing 31 to the third bearing 32, that is, the distance from the first bearing 21 to the rotating member 3 is increased. The moving member 2 is supported by two supporting structures, namely the first bearing 21 and the rotating member 3. By increasing the distance between these two supporting structures, the stability of the moving member 2 can be effectively improved, the risk of fracture of the moving member 2 is further reduced, so that the moving member 2 can achieve a longer stroke compared with the prior art, and thus the moving member 2 can control the wheel to rotate a larger steering angle.

[0067] In some embodiments, the housing 1 is provided with a receiving cavity 19, and the moving member 2 is disposed in the receiving cavity 19, reducing the possibility of interference between the moving member 2 and external objects and improving the stability of the movement of the moving member 2.

[0068] In some further embodiments, the housing 1 includes a main body 11 and a protruding portion 111. In the axial direction of the moving member 2, the protruding portion 111 is located at one end of the main body 11 away from the rotating member 3. The moving member 2 passes through the protruding portion 111, and at least a part of the first bearing 21 is located between the moving member 2 and the protruding portion 111.

[0069] Since the moving member 2 is jointly supported by the first bearing 21 and the rotating member 3, the greater the distance between the first bearing 21 and the rotating member 3, the higher the stability of the moving member 2, and the longer the length that the moving member 2 can extend outside the receiving cavity 19, that is, the longer the stroke that the moving member 2 can achieve. In the embodiments of the present invention, at least a part of the first bearing 21 is located between the moving member 2 and the protruding portion 111, increasing the distance between the first bearing 21 and the rotating member 3, further improving the stability of the moving member 2 and further reducing the possibility of fracture of the moving member 2.

[0070] It should be noted that the first bearing 21 may be completely located between the moving member 2 and the protruding portion 111, or may be partially located between the moving member 2 and the protruding portion 111.

[0071] For example, in some specific embodiments, a part of the first bearing 21 is located between the moving member 2 and the protruding portion 111, and another part is located between the moving member 2 and the main body 11.

[0072] In the embodiments of the present application, by supporting a part of the first bearing 21 by the main body 11, the concentrated stress on the protruding portion 111 is reduced, the risk of damage to the protruding portion 111 is reduced, the overall strength of the steering gear 100 is improved, and the service life of the steering gear 100 is extended.

[0073] Refer to Figure 1 、 Figure 2 and Figure 3, in some specific embodiments, the housing 1 includes a main body 11 and a cover 12. An installation opening is provided at one end of the main body 11, and the cover 12 closes the installation opening. The second bearing 31 is disposed in the main body 11, and the third bearing 32 is disposed in the cover 12.

[0074] In the embodiment of the present utility model, the accommodation cavity 19 is defined between the main body 11 and the cover 12. When assembling the steering gear 100, first place the moving member 2 and the rotating member 3 into the main body 11 through the installation opening, and finally close the installation opening with the cover 12 to enclose the rotating member 3 and the moving member 2 in the housing 1, preventing external objects from affecting the transmission between the rotating member 3 and the moving member 2 and ensuring the reliability of the operation of the steering gear 100.

[0075] Moreover, in the embodiment of the present utility model, the second bearing 31 is disposed in the main body 11 and the third bearing 32 is disposed in the cover 12. When installing the rotating member 3, the rotating member 3 can be first connected to the second bearing 31, and when the cover 12 closes the installation opening, the connection between the rotating member 3 and the third bearing 32 is achieved, improving the convenience of installing the rotating member 3 and the assembly efficiency of the steering gear 100.

[0076] In some specific embodiments, a first sealing ring is provided between the main body 11 and the cover 12 to ensure the sealing performance of the housing 1.

[0077] Referring to Figure 1 、 Figure 2 and Figure 3 , in some embodiments, the moving member 2 is configured as a lead screw, the rotating member 3 is configured as a nut, and the nut is sleeved on the lead screw. It should be understood that in some other embodiments, the moving member 2 can also be configured as a nut, the rotating member 3 can be configured as a lead screw, and the nut is sleeved on the lead screw. As long as the rotation of the rotating member 3 can drive the movement of the moving member 2.

[0078] In some further embodiments, the lead angle of the lead screw is smaller than the equivalent friction angle between the nut and the lead screw, so that the screw thread transmission between the lead screw and the nut has self-locking property.

[0079] Through the above technical solution, when the driving assembly 4 does not drive the rotating member 3 to rotate, the moving member 2 and the rotating member 3 have a certain self-locking property, which can keep the angle of the wheel unchanged, ensuring the stability and safety of the vehicle 200 during driving. It should be noted that in some embodiments, the movement of the moving member needs to be controlled by the steering holding function of the software to ensure the stability of the wheel.

[0080] In some specific embodiments, the moving member 2 is configured as a trapezoidal lead screw, the rotating member 3 is configured as a lead screw nut, and the lead screw nut is sleeved on the trapezoidal lead screw.

[0081] In the embodiments of the present utility model, the structures of the moving member 2 and the rotating member 3 are simple, reducing the cost of the steering gear 100.

[0082] Referring to Figure 2 and Figure 7 , in some embodiments, the lead screw includes a transmission section 25 and a connection section 27. The transmission section 25 cooperates with the nut, and the connection section 27 is adapted to be connected to the joint fork 141.

[0083] In the above technical solution, the lead screw only needs to be provided with threads on the transmission section 25, and there is no need to provide threads on the connection section 27, which simplifies the structure of the lead screw and reduces the cost of the steering gear 100.

[0084] In some embodiments, the diameter of the transmission section 25 is smaller than the diameter of the connection section 27.

[0085] Since the nut is sleeved on the transmission section 25 and the second pulley 43 is sleeved on the nut, in the embodiments of the present application, by reducing the diameter of the transmission section 25, the diameter of the nut can be reduced, and the diameter of the second pulley 43 can be reduced, which is beneficial to reducing the overall volume of the steering gear 100 and improving the convenience of installing the steering gear 100.

[0086] In addition, in the embodiments of the present application, the diameter of the connection section 27 is larger, which improves the structural strength of the connection section 27 to facilitate the connection between the connection section 27 and the joint fork 141.

[0087] In some specific embodiments, a threaded hole is provided at the end of the connection section 27 far from the transmission section 25. After the bolt passes through the joint fork 141, it is threadedly engaged with the threaded hole, thereby fixing the joint fork 141 to the connection section 27. In the embodiments of the present application, the connection method between the joint fork 141 and the connection section 27 is convenient and the connection stability is relatively high.

[0088] In some embodiments, the lead screw further includes a transition section 26. One end of the transition section 26 is connected to the transmission section 25, and the other end of the transition section 26 is connected to the connection section 27.

[0089] The transmission section 25 cooperates with the nut, and the connection section 27 cooperates with the first bearing 21. By providing the transition section 26 between the transmission section 25 and the connection section 27, the distance between the nut and the first bearing 21 is increased, improving the overall stability of the lead screw.

[0090] In some specific embodiments, the diameter of the transition section 26 is larger than the diameter of the transmission section 25 and the diameter of the transition section 26 is smaller than the diameter of the connection section 27.

[0091] Since the transition section 26 does not need to be connected to the joint fork 141, the diameter of the transition section 26 can be designed to be smaller than that of the connecting section 27, which is beneficial to reducing the weight of the steering gear 100 and lowering the cost of the steering gear 100. The diameter of the transmission section 25 is smaller than that of the transition section 26, which is beneficial to reducing the diameter of the nut and the diameter of the second pulley 43, and is beneficial to reducing the overall volume of the steering gear 100 and improving the convenience of installing the steering gear 100.

[0092] In some embodiments, the length of the connecting section 27 is less than the length of the transmission section 25.

[0093] Since a part of the transmission section 25 needs to be always in threaded engagement with the nut, in the embodiments of the present application, the length of the transmission section 25 is greater than the length of the connecting section 27, increasing the length of the threaded engagement between the transmission section 25 and the nut, and further improving the transmission stability between the nut and the transmission section 25.

[0094] In some embodiments, the length of the transition section 26 is less than the length of the connecting section 27.

[0095] Through the above technical solution, since the length of the transition section 26 does not affect the stroke length of the lead screw, by shortening the length of the transition section 26, it is beneficial to shorten the overall length of the lead screw, thereby reducing the size of the steering gear 100 in the axial direction of the lead screw, being beneficial to the miniaturization of the steering gear 100, and facilitating the installation of the steering gear 100.

[0096] Referring to Figure 1 、 Figure 2 and Figure 3 , in some embodiments, the second bearing 31 includes an outer ring 311, an inner ring 312 and mating balls 313. The mating balls 313 are arranged between the inner ring 312 and the outer ring 311. The outer ring 311 is in limiting fit with the housing 1 to limit the movement of the outer ring 311 relative to the housing 1, and the inner ring 312 is in limiting fit with the rotating member 3 to limit the movement of the inner ring 312 relative to the rotating member 3.

[0097] In the above technical solution, the outer ring 311 is in limiting fit with the housing 1 to limit the movement of the outer ring 311 relative to the housing 1, and the inner ring 312 is in limiting fit with the rotating member 3 to limit the movement of the inner ring 312 relative to the rotating member 3, that is, the movement of the rotating member 3 relative to the housing 1 is restricted, ensuring the stability of the rotation of the rotating member 3 and the reliability of the use of the steering gear 100.

[0098] In some specific embodiments, a first limiting member 33 is provided on the rotating member 3. The first limiting member 33 abuts against the inner ring 312 to limit the movement of the inner ring 312.

[0099] In the embodiments of the present utility model, by the first limiting member 33 abutting against the inner ring 312 to limit the movement of the inner ring 312, the reliability of the connection between the inner ring 312 and the rotating member 3 is ensured.

[0100] In some further embodiments, a first limiting groove 34 is provided on the rotating member 3. Both sides of the inner ring 312 are respectively abutted against the inner wall of the first limiting groove 34 and the first limiting member 33, completely restricting the movement of the inner ring 312, further reducing the possibility of the inner ring 312 moving, and ensuring the reliability of the rotation of the rotating member 3. And in the embodiment of the present utility model, by providing the first limiting groove 34 on the rotating member 3 to restrict the movement of one side of the inner ring 312, the cost of the steering gear 100 is reduced, and the assembly method of the inner ring 312 and the steering gear 100 in this way is simple, improving the assembly efficiency of the steering gear 100.

[0101] It should be understood that in other embodiments, two first limiting members 33 may also be provided on the rotating member 3, the inner ring 312 is arranged between the two first limiting members 33, and both sides of the inner ring 312 are respectively abutted against the two first limiting members 33 to restrict the movement of the inner ring 312.

[0102] In some specific embodiments, the first limiting member 33 is threadedly connected to the rotating member 3. This connection method has high reliability and is convenient for assembly, improving the assembly efficiency of the steering gear 100. It should be connected that in other embodiments, the connection method between the first limiting member 33 and the rotating member 3 may also be interference fit, welding, snap connection, etc., and the present utility model does not limit this.

[0103] In some embodiments, the housing 1 is provided with a second limiting member 15, and the second limiting member 15 abuts against the outer ring 311 to restrict the movement of the outer ring 311.

[0104] In the embodiment of the present utility model, by the second limiting member 15 abutting against the outer ring 311 to restrict the movement of the outer ring 311, the reliability of the connection between the outer ring 311 and the housing 1 is ensured.

[0105] In some further embodiments, a second limiting groove 16 is provided on the housing 1. Both sides of the outer ring 311 are respectively abutted against the inner wall of the second limiting groove 16 and the second limiting member 15, completely restricting the movement of the outer ring 311, further reducing the possibility of the outer ring 311 moving, and ensuring the reliability of the rotation of the housing 1. And in the embodiment of the present utility model, by providing the second limiting groove 16 on the housing 1 to restrict the movement of one side of the outer ring 311, the cost of the steering gear 100 is reduced, and the assembly method of the outer ring 311 and the steering gear 100 in this way is simple, improving the assembly efficiency of the steering gear 100.

[0106] It should be understood that in other embodiments, two second limiting members 15 may also be provided on the housing 1, the outer ring 311 is arranged between the two second limiting members 15, and both sides of the outer ring 311 are respectively abutted against the two second limiting members 15 to restrict the movement of the outer ring 311.

[0107] In some specific embodiments, the second limiting member 15 is threadedly connected to the housing 1. This connection method has high reliability and is convenient for assembly, improving the assembly efficiency of the steering gear 100. It should be noted that in other embodiments, the connection method between the second limiting member 15 and the housing 1 can also be interference fit, welding, snap connection, etc., and the present invention does not limit this.

[0108] Referring to Figure 1 、 Figure 2 and Figure 3 , in some specific embodiments, the first bearing 21 is configured as a sliding bearing, the second bearing 31 is configured as an angular contact ball bearing, and the third bearing 32 is configured as a hand force end needle bearing.

[0109] Through the above technical solutions, while ensuring the reliability of the steering gear 100, the cost of the steering gear 100 is reduced.

[0110] Referring to Figure 1 、 Figure 2 and Figure 4 , in some embodiments, the moving member 2 is provided with a third limiting member 23, and the third limiting member 23 is slidably engaged with the housing 1 to limit the circumferential movement of the moving member 2.

[0111] Since the rotating member 3 is in threaded transmission cooperation with the moving member 2, only when the moving member 2 cannot rotate can the rotation of the rotating member 3 drive the moving member 2 to move. The third limiting member 23 is slidably engaged with the housing 1, restricting the circumferential movement of the moving member 2 and improving the stability of the movement of the moving member 2.

[0112] In some embodiments, the housing 1 is provided with a guiding structure extending along the axial direction of the moving member 2. One end of the third limiting member 23 is fixedly connected to the moving member 2, and the other end of the third limiting member 23 is engaged with the guiding structure.

[0113] Through the above technical solutions, the moving member 2 is slidably connected to the housing 1 through the third limiting member 23, reducing the contact area between the moving member 2 and the housing 1, reducing the friction during the movement of the moving member 2, and improving the smoothness of the movement of the moving member 2.

[0114] In some specific embodiments, the third limiting member 23 is provided with a slider, the guiding structure is formed as a sliding groove 18, and at least a part of the slider is located in the sliding groove 18. In the embodiments of the present invention, the sliding cooperation method between the third limiting member 23 and the housing 1 is simple, reducing the cost of the steering gear 100.

[0115] In some further embodiments, the steering gear 100 further includes a displacement sensor 5. The third limiting member 23 is provided with a sensing member 24, and the displacement sensor 5 is electromagnetically cooperated with the sensing member 24 to detect the displacement of the moving member 2.

[0116] In the embodiment of the present utility model, the displacement sensor 5 is adapted to be communicatively connected to the control module of the vehicle 200, so that the control module can detect the position of the moving member 2, which is convenient for the vehicle 200 to accurately control the deflection of the wheels, and improves the flexibility and safety of the vehicle 200.

[0117] Refer to Figure 2 and Figure 3 In some specific embodiments, the third limiting member 23 is a convex portion provided on the moving member 2. The third limiting member 23 extends towards the housing 1. An induction member 24 is provided at one end of the third limiting member 23 away from the moving member 2. The induction member 24 is integrally formed with the slider. A sliding groove 18 is provided on the housing 1. The induction member 24 is slidably disposed in the sliding groove 18 to achieve the sliding fit between the third limiting member 23 and the housing 1.

[0118] The housing 1 is provided with a mounting groove 17. The mounting groove 17 communicates with the sliding groove 18. The displacement sensor 5 is disposed in the mounting groove 17. The induction member 24 is disposed in the sliding groove 18 and abuts against the displacement sensor 5.

[0119] Through the above technical solution, the distance between the induction member 24 and the displacement sensor 5 is reduced, the accuracy of the displacement sensor 5 in detecting the position of the induction member 24 is improved, and the reliability of the use of the steering gear 100 is improved.

[0120] In some specific embodiments, a sealing ring is provided between the displacement sensor 5 and the inner wall of the mounting groove 17, which improves the sealing performance of the housing 1 and reduces the risk of external objects entering the housing 1 and affecting the transmission of the internal structure of the housing 1.

[0121] Refer to Figure 2 and Figure 7 In some specific embodiments, the third limiting member 23 is threadedly connected to the outer peripheral wall of the transition section 26. This connection method has high stability and is convenient for assembly, improving the assembly efficiency of the steering gear 100.

[0122] Refer to Figure 2 , Figure 5 and Figure 6 In some embodiments of the present utility model, the steering gear 100 is adapted to be connected to the cross beam of the subframe 240 of the vehicle 200.

[0123] Compared with the technical solution in the related art where the steering gear is disposed between the subframe and the brake, in the embodiment of the present utility model, the steering gear 100 is adapted to be disposed on the cross beam of the subframe 240, which increases the movable space of the moving member 2, thereby increasing the displacement stroke of the moving member 2. Furthermore, it is beneficial to increase the maximum steering angle of the wheels, which is beneficial to improving the flexibility of the vehicle 200, and can also avoid increasing the unsprung mass and improve the handling and stability performance of the whole vehicle.

[0124] Reference Figure 2 、 Figure 5 and Figure 6 In some embodiments, the housing 1 is provided with a first mounting portion 13, and the first mounting portion 13 is adapted to be fixed to the subframe 240 of the vehicle 200.

[0125] In the embodiment of the present utility model, the housing 1 is adapted to be fixed to the subframe 240 of the vehicle 200 through the first mounting portion 13, which increases the movable space of the moving member 2 and provides an extended space for the longer displacement stroke of the moving member 2, so as to facilitate the effect of increasing the maximum steering angle of the wheel.

[0126] In some further embodiments, the first mounting portion 13 is adapted to be fixed to the central position of the cross beam of the subframe 240, further increasing the movable space of the moving member 2 and being more conducive to increasing the maximum steering angle of the wheel.

[0127] In some specific embodiments, the first mounting portion 13 is disposed on the outer peripheral wall of the housing 1. Since the housing 1 is used to accommodate the moving member 2 and the moving member 2 can move along its own axial direction, the housing 1 is configured as a long strip structure, and the length direction of the housing 1 is parallel to the axial direction of the moving member 2. In the embodiment of the present utility model, the outer peripheral wall of the housing 1 refers to the side wall of the housing 1 disposed around the moving member 2.

[0128] In the embodiment of the present utility model, the first mounting portion 13 is disposed on the outer peripheral wall of the housing 1, which improves the installation stability of the steering gear 100.

[0129] In some embodiments, a plurality of first mounting portions 13 are provided, and some of the plurality of first mounting portions 13 are arranged at intervals along the axial direction of the moving member 2.

[0130] Through the above technical solution, when the steering gear 100 is installed on the subframe 240 of the vehicle 200, some of the first mounting portions 13 are arranged along the axial direction of the moving member 2, so that the overall force of the steering gear 100 in the axial direction of the moving member 2 is more uniform, and the overall stability of the steering gear 100 when the moving member 2 moves is improved.

[0131] In some embodiments, three first mounting portions 13 are provided, and the three first mounting portions 13 are arranged in a triangular shape.

[0132] Through the above technical solution, when the steering gear 100 is installed on the subframe 240 of the vehicle 200, the three first mounting portions 13 are arranged in a triangular shape and connected to the subframe 240, further optimizing the force condition of the steering gear 100 and further improving the overall stability of the steering gear 100.

[0133] In some specific embodiments, there are three first mounting portions 13. One of the first mounting portions 13 is on the same side of the housing 1 as the displacement sensor 5, and the other two first mounting portions 13 are both on the side of the housing 1 away from the displacement sensor 5. The two first mounting portions 13 on the side of the housing 1 away from the displacement sensor 5 are arranged at intervals along the axial direction of the moving member 2.

[0134] In the above technical solution, the two first mounting portions 13 are both on the side of the housing 1 away from the displacement sensor 5, which reduces the influence of the arrangement of the first mounting portions 13 on the installation of the displacement sensor and improves the assembly efficiency of the displacement sensor. The three first mounting portions 13 are distributed on both sides of the steering gear 100 and are arranged in a triangular shape, further optimizing the force-bearing condition of the steering gear 100 and further improving the overall stability of the steering gear 100.

[0135] In some specific embodiments, the first mounting portion 13 is formed as a mounting ear 131. A plurality of mounting ears 131 are arranged at intervals, and mounting holes 1311 are provided on each of the plurality of mounting ears 131. The mounting ear 131 is adapted to be connected to the subframe 240 of the vehicle 200 by a fastener passing through the mounting hole 1311.

[0136] In the embodiment of the present utility model, the structure of the first mounting portion 13 is simple, which reduces the cost of the steering gear 100. And the steering gear 100 is adapted to be fixed to the subframe 240 through a plurality of mounting ears 131, ensuring the stability of the connection between the steering gear 100 and the subframe 240.

[0137] In some further embodiments, a second mounting portion 14 is provided at one end of the moving member 2 located outside the housing 1. The second mounting portion 14 is adapted to be connected to the steering knuckle of the vehicle 200.

[0138] In the related art, the steering gear is arranged between the brake and the subframe and is used as a connecting rod for the suspension arm. Not only is the displacement stroke of the steering gear small, but the steering gear also increases the unsprung mass, affecting the handling and stability performance of the whole vehicle.

[0139] In the embodiment of the present utility model, the housing 1 of the steering gear 100 is adapted to be fixed to the subframe 240 of the vehicle 200 through the first mounting portion 13, and the moving member 2 of the steering gear 100 is adapted to be connected to the steering knuckle of the vehicle 200. The steering knuckle of the vehicle 200 is connected to the brake on the wheel. When the moving member 2 moves, it is adapted to drive the wheel to deflect through the steering knuckle.

[0140] In the embodiment of the present utility model, by fixing the housing 1 of the steering gear 100 on the subframe 240 and connecting the moving member 2 of the steering gear 100 to the wheel through the steering knuckle, the displacement stroke of the moving member 2 can be increased, thereby increasing the maximum steering angle of the wheel, improving the flexibility of the vehicle 200, and avoiding increasing the unsprung mass, ensuring the handling and stability performance of the whole vehicle.

[0141] In some specific embodiments, the second mounting portion 14 includes a knuckle 141, and the knuckle 141 is connected to the moving member 2 by a fastener. The knuckle 141 is adapted to be connected to the rear control arm 230 of the vehicle through a bushing, and the ball joint of the rear control arm 230 is connected to the steering knuckle.

[0142] Referring to Figure 1 、 Figure 2 and Figure 3 , in some embodiments, the steering gear 100 further includes a telescopic dust cover 6, and the dust cover 6 is sleeved on the part of the moving member 2 located outside the housing 1. Both ends of the dust cover 6 are respectively fixed to the knuckle 141 and the housing 1. By covering the part of the moving member 2 located outside the housing 1 with the dust cover 6, it is avoided that external dust enters between the moving member 2 and the housing 1 and affects the movement of the moving member 2, ensuring the reliability of the operation of the steering gear 100.

[0143] In some specific embodiments, both ends of the dust cover 6 are respectively fixed to the knuckle 141 and the housing 1 through clamps 61, and this connection method is simple, improving the assembly efficiency of the steering gear 100.

[0144] The following refers to the attached Figures 1 - 6 Describe a specific embodiment of the present invention.

[0145] The steering gear 100 according to the embodiment of the present invention includes: a housing 1, a moving member 2, a rotating member 3, and a driving assembly 4. The moving member 2 is movably arranged in the housing 1 and at least partially extends out of the housing 1. The rotating member 3 is rotatably arranged in the housing 1 and is in threaded driving cooperation with the moving member 2 to drive the moving member 2 to move. The driving assembly 4 is connected to the rotating member 3 to drive the rotating member 3 to rotate.

[0146] The steering gear 100 further includes: a first bearing 21, a second bearing 31, and a third bearing 32. The first bearing 21 is arranged between the moving member 2 and the housing 1 to support the moving member 2, and the second bearing 31 and the third bearing 32 are arranged between the rotating member 3 and the housing 1 at intervals to support the rotating member 3.

[0147] The housing 1 includes a main body 11 and a cover body 12. One end of the main body 11 is provided with an installation opening, and the cover body 12 closes the installation opening. The second bearing 31 is arranged on the main body 11, and the third bearing 32 is arranged on the cover body 12. A first sealing ring is arranged between the main body 11 and the cover body 12.

[0148] The moving member 2 is configured as a lead screw, and the rotating member 3 is configured as a nut, and the nut is sleeved on the lead screw. The lead angle of the lead screw is smaller than the equivalent friction angle between the nut and the lead screw. The moving member 2 is configured as a trapezoidal lead screw, and the rotating member 3 is configured as a lead screw nut.

[0149] The second bearing 31 includes an outer ring 311, an inner ring 312 and a mating ball 313. The mating ball 313 is arranged between the inner ring 312 and the outer ring 311. The outer ring 311 is limitedly matched with the housing 1 to limit the movement of the outer ring 311 relative to the housing 1. The inner ring 312 is limitedly matched with the rotating part 3 to limit the movement of the inner ring 312 relative to the rotating part 3.

[0150] The rotating member 3 is provided with a first stopper 33, which abuts against the inner ring 312 to limit the movement of the inner ring 312. The rotating member 3 is provided with a first stopper groove 34, and two sides of the inner ring 312 abut against the inner wall of the first stopper groove 34 and the first stopper 33 respectively. The first stopper 33 is threadedly connected to the rotating member 3.

[0151] The housing 1 is provided with a second stopper 15, which abuts against the outer ring 311 to limit the movement of the outer ring 311. The housing 1 is provided with a second stopper groove 16, and both sides of the outer ring 311 abut against the inner wall of the second stopper groove 16 and the second stopper 15 respectively. The second stopper 15 is threadedly connected to the housing 1.

[0152] The first bearing 21 is configured as a sliding bearing, the second bearing 31 is configured as an angular contact ball bearing, and the third bearing 32 is configured as a hand-end needle bearing.

[0153] The moving member 2 is provided with a third stopper 23, which slidably cooperates with the housing 1 to limit the rotational freedom of the moving member 2. The steering gear 100 also includes a displacement sensor 5, the third stopper 23 is provided with a sensing member 24, and the displacement sensor 5 and the sensing member 24 electromagnetically cooperate to detect the displacement of the moving member 2.

[0154] The third position limiting member 23 is a raised portion arranged on the movable member 2. The third position limiting member 23 is threadedly connected to the outer peripheral wall of the movable member 2. The third position limiting member 23 extends toward the shell 1. An induction member 24 is arranged at one end of the third position limiting member 2 away from the movable member 2. A slide groove cooperating with the induction member 24 is arranged on the shell 1. The induction member 24 can be slidably arranged in the slide groove to realize the sliding cooperation between the third position limiting member 23 and the shell 1.

[0155] The driving assembly 4 includes a driving motor 41 , the output shaft of the driving motor 41 is provided with a first pulley, the rotating member 3 is provided with a second pulley 43 , and the first pulley and the second pulley 43 are connected through a synchronous belt 42 .

[0156] The drive motor 41 is arranged outside the housing 1 , and is fixed to the housing 1 by fasteners. The output shaft of the drive motor 41 extends into the housing 1 , and a second sealing ring is arranged between the drive motor 41 and the housing 1 to ensure the sealing of the drive motor 41 .

[0157] The housing 1 is provided with a first mounting portion 13, and the first mounting portion 13 is adapted to be fixed to the subframe 240 of the vehicle 200.

[0158] There are three first mounting portions 13. One of the first mounting portions 13 is on the same side of the housing 1 as the displacement sensor 5, and the other two first mounting portions 13 are both on the side of the housing 1 away from the displacement sensor 5. The two first mounting portions 13 on the side of the housing 1 away from the displacement sensor 5 are arranged at intervals along the axial direction of the moving member 2.

[0159] The first mounting portion 13 is formed as a mounting ear 131. A plurality of mounting ears 131 are arranged at intervals, and mounting holes 1311 are provided on each of the plurality of mounting ears 131. The mounting ear 131 is adapted to be connected to the subframe 240 of the vehicle 200 by a fastener passing through the mounting hole 1311.

[0160] One end of the moving member 2 located outside the housing 1 is provided with a second mounting portion 14, and the second mounting portion 14 is adapted to be connected to the steering knuckle of the vehicle 200.

[0161] The second mounting portion 14 includes a knuckle fork 141, and the knuckle fork 141 is connected to the moving member 2 by a fastener. The knuckle fork 141 is adapted to be connected to the rear control arm 230 of the vehicle through a bushing, and the ball joint of the rear control arm 230 is connected to the steering knuckle.

[0162] The steering gear 100 further includes a telescopic dust cover 6. The dust cover 6 is sleeved on the part of the moving member 2 located outside the housing 1, and both ends of the dust cover 6 are fixed to the knuckle fork 141 and the housing 1 respectively through clamps 61.

[0163] Referring to Figure 1 、 Figure 5 and Figure 6 According to the vehicle 200 of the embodiment of the present invention, it includes: a subframe 240 and a steering gear 100. The steering gear 100 is the steering gear 100 in the above technical solution, and the steering gear 100 is mounted on the cross beam of the subframe 240.

[0164] According to the vehicle 200 of an embodiment of the present utility model, the steering gear 100 therein can drive the rotating member 3 to rotate through the driving assembly 4, and the rotating member 3 can drive the moving member 2 to move to drive the wheels to deflect; through the first bearing 21 between the moving member 2 and the housing 1, wear between the moving member 2 and the housing 1 is avoided, and the service life of the moving member 2 and the housing 1 is extended. Through the second bearing 31 between the rotating member 3 and the housing 1, wear between the rotating member 3 and the housing 1 is avoided, and the service life of the rotating member 3 and the housing 1 is extended; the stability of the movement of the moving member 2 is improved through the first bearing 21, and the stability of the rotation of the rotating member 3 is improved through the second bearing 31; the moving member 2 is supported by the first bearing 21 and the rotating member 3 is supported by the second bearing 31, ensuring the overall structural strength of the steering gear 100, enabling the moving member 2 to achieve a longer displacement stroke, reducing the possibility of fracture during the process of the steering gear 100 achieving a longer displacement stroke, and ensuring the reliability of the operation of the steering gear 100; the steering gear 100 is installed on the cross beam of the subframe 240, increasing the moving space of the moving member 2. The moving member 2 can achieve a larger displacement stroke, increasing the maximum rotation angle of the wheels 250 and improving the flexibility of the vehicle 200.

[0165] Referring to Figure 1 、 Figure 5 and Figure 6 , in some specific embodiments, there are multiple steering gears 100 and they include a left rear steering gear 101 and a right rear steering gear 102. Both the left rear steering gear 101 and the right rear steering gear 102 are connected to the cross beam of the subframe 240.

[0166] The vehicle 200 includes a left rear brake 210 and a right rear brake 220. The left rear brake 210 and the left rear steering gear 101, and the right rear steering gear 102 and the right rear brake 220 are connected by rear control arms 230 respectively.

[0167] Thus, the displacement stroke of the steering gear 100 can be increased, thereby increasing the maximum rotation angle of the rear wheels 250, improving the flexibility of the vehicle 200, and also avoiding an increase in the unsprung mass, ensuring the handling and stability performance of the whole vehicle.

[0168] Specifically, the vehicle 200 includes a subframe 240. Both the left rear steering gear 101 and the right rear steering gear 102 are fixed to the cross beam of the subframe 240. The left rear steering gear 101 and the right rear steering gear 102 are independently arranged. The left rear steering gear 101 is located on the left side of the subframe 240, and the right rear steering gear 102 is located on the right side of the subframe 240.

[0169] The left rear brake 210 is installed on the rear wheel 250 located on the left side, and the right rear brake 220 is installed on the rear wheel 250 located on the right side. The left rear brake 210 is disposed opposite to the left rear steering gear 101 and connected by a rear control arm 230, so that the left rear steering gear 101 can drive the left rear brake 210 to move through the rear control arm 230, thereby controlling the steering of the rear wheel 250 located on the left side; the right rear brake 220 is disposed opposite to the right rear steering gear 102 and connected by a rear control arm 230, so that the right rear steering gear 102 can drive the right rear brake 220 to move through the rear control arm 230, thereby controlling the steering of the rear wheel 250 located on the right side.

[0170] It can be understood that by fixing the steering gear 100 assembly on the cross beam of the subframe 240 and setting the steering gear 100 to be connected to the brake through the rear control arm 230, the movement space of the steering gear 100 is increased, the displacement stroke of the steering gear 100 can be made larger, the maximum steering angle of the rear wheel 250 is increased, the maximum steering angle of the rear wheel 250 can reach more than 10°, the flexibility of the vehicle 200 is improved, and the unsprung mass of the suspension is not increased, ensuring the handling and stability performance of the whole vehicle. In addition, by setting the left rear steering gear 101 and the right rear steering gear 102 to be independent, the toe angle of the rear wheel 250 can be adjusted during emergency braking, improving the stability during braking.

[0171] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0172] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A steering gear (100), characterized in that: include: Housing (1); A drive assembly (4); A moving member (2) and a rotating member (3), wherein the moving member (2) is arranged on the housing (1), the moving member (2) is transmission-connected with the rotating member (3), and the driving assembly (4) is suitable for driving the rotating member (3) to move the moving member (2); A first bearing (21), the first bearing (21) being arranged between the moving member (2) and the housing (1); A second bearing (31), wherein the second bearing (31) is arranged between the rotating member (3) and the housing (1).

2. The steering gear (100) according to claim 1, characterized in that: The steering gear (100) is suitable for being connected to a crossbeam of a sub-frame (240).

3. The steering gear (100) according to claim 1, characterized in that: It also includes a third bearing (32), which is arranged between the rotating member (3) and the housing (1), and in the axial direction of the moving member (2), the second bearing (31) and the third bearing (32) are arranged at a distance.

4. The steering gear (100) according to claim 3, characterized in that: The driving assembly (4) comprises an output end (40), the output end (40) being connected to the rotating member (3) to drive the rotating member (3) to rotate, and the second bearing (31) and the third bearing (32) being distributed on both sides of the output end (40).

5. The diverter (100) according to claim 4, characterized in that: The driving assembly (4) comprises: a driving motor (41) and a pulley, wherein the pulley is arranged on the rotating member (3), the driving motor (41) is drivingly connected to the pulley, and the pulley forms the output end (40).

6. The diverter (100) according to claim 4, characterized in that: In the axial direction of the moving member (2), the first bearing (21) is located at an end of the second bearing (31) away from the output end (40).

7. The diverter (100) according to claim 6, characterized in that: The distance from the first bearing (21) to the second bearing (31) is greater than the distance from the second bearing (31) to the third bearing (32).

8. The diverter (100) according to claim 1, characterized in that: The housing (1) is provided with a containing cavity (19), and the moving part (2) is arranged in the containing cavity (19).

9. The diverter (100) according to claim 7, characterized in that: The housing (1) comprises a main body (11) and a protruding portion (111); in the axial direction of the moving member (2), the protruding portion (111) is located at an end of the main body (11) away from the rotating member (3); the moving member (2) passes through the protruding portion (111); and at least a portion of the first bearing (21) is located between the moving member (2) and the protruding portion (111).

10. The diverter (100) according to claim 9, characterized in that: A portion of the first bearing (21) is located between the moving member (2) and the protruding portion (111), and another portion of the first bearing (21) is located between the moving member (2) and the main body (11).

11. The steering gear (100) according to claim 1, characterized in that: The moving part (2) is configured as a screw rod, and the rotating part (3) is configured as a nut, and the nut is sleeved on the screw rod.

12. The steering gear (100) according to claim 11, characterized in that: The screw rod comprises a transmission section (25) and a connection section (27), the transmission section (25) cooperates with the nut, and the connection section (27) is suitable for connecting with the yoke (141).

13. The diverter (100) according to claim 12, characterized in that: The diameter of the transmission section (25) is smaller than the diameter of the connecting section (27).

14. The diverter (100) according to claim 12, characterized in that: The screw rod further comprises a transition section (26), one end of the transition section (26) is connected to the transmission section (25), and the other end of the transition section (26) is connected to the connection section (27).

15. The diverter (100) according to claim 14, characterized in that: The diameter of the transition section (26) is greater than the diameter of the transmission section (25), and the diameter of the transition section (26) is smaller than the diameter of the connecting section (27).

16. The diverter (100) according to claim 14, characterized in that: The length of the connecting section (27) is smaller than the length of the transmission section (25).

17. The diverter (100) according to claim 16, characterized in that: The length of the transition section (26) is shorter than the length of the connecting section (27).

18. The diverter (100) according to claim 1, characterized in that: The second bearing (31) is an angular contact ball bearing, the rotating member (3) is provided with a first limit member (33), the housing (1) is provided with a second limit member (15), and in the axial direction of the moving member (2), the first limit member (33) and the second limit member (15) respectively abut against two sides of the second bearing (31) to limit the movement of the second bearing (31).

19. The diverter (100) according to claim 1, characterized in that: The moving member (2) is provided with a third limiting member (23), and the third limiting member (23) is slidably matched with the housing (1) to limit the circumferential movement of the moving member (2).

20. The diverter (100) according to claim 19, characterized in that: The housing (1) is provided with a guide structure extending along the axial direction of the moving member (2); one end of the third position-limiting member (23) is fixedly connected to the moving member (2); and the other end of the third position-limiting member (23) cooperates with the guide structure.

21. The diverter (100) according to claim 19, characterized in that: It also comprises a displacement sensor (5), the third position-limiting member (23) is provided with a sensing member (24), and the displacement sensor (5) and the sensing member (24) cooperate electromagnetically to detect the displacement of the moving member (2).

22. The diverter (100) according to claim 21, characterized in that: The movable member (2) is configured as a screw rod, the rotating member (3) is configured as a nut, the screw rod comprises a transmission section (25), a transition section (26) and a connecting section (27), the transmission section (25) cooperates with the nut, the connecting section (27) is suitable for connecting with a yoke (141), the transmission section (25) is connected to the connecting section (27) via the transition section (26), and the third limiting member (23) is arranged on the transition section (26).

23. The diverter (100) according to any one of claims 1 to 22, characterized in that: A first mounting portion (13) is provided on the outer peripheral wall of the housing (1), and the first mounting portion (13) is suitable for being fixed to a sub-frame (240) of a vehicle (200).

24. The diverter (100) according to claim 23, characterized in that: A plurality of the first mounting parts (13) are provided, and some of the first mounting parts (13) among the plurality of the first mounting parts (13) are arranged at intervals along the axial direction of the moving member (2).

25. The diverter (100) according to claim 23, characterized in that: Three first mounting portions (13) are provided, and the three first mounting portions (13) are arranged in a triangle shape.

26. The diverter (100) according to claim 23, characterized in that: It also comprises a displacement sensor (5), wherein the displacement sensor (5) is arranged on the housing (1), and the displacement sensor (5) is used to detect the displacement of the moving part (2); Three first mounting parts (13) are provided, one of which is located on the same side of the housing (1) as the displacement sensor (5), and the other two first mounting parts (13) are located on a side of the housing (1) away from the displacement sensor (5).

27. The diverter (100) according to claim 23, characterized in that: A second mounting portion (14) is provided at one end of the moving member (2) away from the rotating member, and the second mounting portion (14) is suitable for being connected to a steering knuckle of a vehicle (200).

28. A vehicle (200), characterized in that: include: Subframe (240); A steering gear (100), wherein the steering gear (100) is a steering gear (100) according to any one of claims 1 to 27, and the steering gear (100) is mounted on a crossbeam of the subframe (240).

29. The vehicle (200) according to claim 28, characterized in that The steering gear (100) is multiple and includes a left rear steering gear (101) and a right rear steering gear (102); the left rear steering gear (101) and the right rear steering gear (102) are both connected to the crossbeam of the sub-frame (240).

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