Steering gear and vehicle

Abstract

A steering gear (100) and a vehicle. The steering gear comprises: a housing (1); a driving assembly (4); a movable member (2) and a rotary member (3), the movable member (2) being arranged on the housing (1), the movable member (2) being in transmission connection with the rotary member (3), and the driving assembly (4) being adapted to drive the rotary member (3) so as to cause the movable member (2) to move; a first bearing (21), the first bearing (21) being arranged between the movable member (2) and the housing (1); and a second bearing (31), the second bearing (31) being arranged between the rotary member (3) and the housing (1).

Description

Steering gear and vehicle

[0001] The present application claims priority to Chinese Patent Application No. 202422002850.7, filed on August 16, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the field of vehicles, and in particular to a steering gear and a vehicle. BACKGROUND

[0003] The development of vehicles and steering gears has driven the progress of transportation tools, and these technologies have provided more efficient, safe, and comfortable solutions for modern transportation. SUMMARY

[0004] The present disclosure aims to at least solve one of the technical problems existing in the related art. To this end, the present disclosure provides a steering gear, which supports a moving part by a first bearing and supports a rotating part by a second bearing, thereby ensuring the structural strength of the steering gear as a whole, reducing the risk of breakage of the moving part, and allowing the moving part to achieve a longer displacement stroke.

[0005] In a first aspect, a steering gear is provided, comprising: 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, the driving assembly is configured to drive the rotating part to move the moving part; the first bearing is arranged between the moving part and the housing; and the second bearing is arranged between the rotating part and the housing.

[0006] According to the steering gear of some embodiments of the present disclosure, the driving assembly can drive the rotating part to rotate, and the rotating part can drive the moving part to move to deflect the wheels; the first bearing between the moving part and the housing avoids wear of the moving part and the housing, prolonging the service life of the moving part and the housing, and the second bearing between the rotating part and the housing avoids wear of the rotating part and the housing, prolonging the service life of the rotating part and the housing; the first bearing improves the stability of the movement of the moving part, and the second bearing improves the stability of the rotation of the rotating part; the first bearing supports the moving part, and the second bearing supports the rotating part, thereby ensuring the structural strength of the steering gear as a whole, allowing the moving part to achieve a longer displacement stroke, reducing the possibility of breakage during the steering gear achieving a longer displacement stroke, and ensuring the reliability of the steering gear.

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

[0008] In some embodiments, the steering device further comprises a third bearing disposed between the rotating member and the housing, the second bearing and the third bearing being spaced apart in the axial direction of the moving member.

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

[0010] In some embodiments, the driving assembly further comprises a driving motor and a pulley, the pulley being disposed on the rotating member, the driving motor being in driving connection with the pulley, the pulley being formed as 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 between the first bearing and the second bearing is greater than the distance between the second bearing and 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 comprises a main body and a protruding portion, the protruding portion being located at an end of the main body away from the rotating member in the axial direction of the moving member, the moving member penetrating through the protruding portion, and the first bearing being at least partially 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 of the first bearing is located between the moving member and the main body.

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

[0017] In some embodiments, the lead screw comprises a transmission section and a connecting section, the transmission section being matched with the nut, and the connecting section being configured to be connected with a yoke.

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

[0019] In some embodiments, the lead screw further comprises a transition section, a first end of the transition section being connected with the transmission section, and a second end of the transition section being connected with the connecting section.

[0020] In some embodiments, the transition section has a diameter larger than that of the transmission section and smaller than that of the connecting section.

[0021] In some embodiments, the connecting section has a length smaller than that of the transmission section in the axial direction of the moving member.

[0022] In some embodiments, the transition section has a length smaller than that of the connecting section in the axial direction of the moving member.

[0023] In some embodiments, the second bearing is an angular contact ball bearing, the rotating member is provided with a first limiting member, the housing is provided with a second limiting member, and the first limiting member and the second limiting member respectively abut against two sides of the second bearing to limit 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 in sliding fit with the housing to limit circumferential movement of the moving member.

[0025] In some embodiments, the housing is provided with a guide structure extending in the axial direction of the moving member, one end of the third limiting member is connected to the moving member, and the other end of the third limiting member is in fit with the guide structure.

[0026] In some embodiments, the steering device further comprises a displacement sensor, the third limiting member is provided with a sensing member, and the displacement sensor is in electromagnetic fit with the sensing member to detect displacement of the moving member.

[0027] In some embodiments, the moving member is configured as a lead screw, the rotating member is configured as a nut, the lead screw comprises a transmission section, a transition section and a connecting section, the transmission section is in fit with the nut, the connecting section is configured to be connected with a yoke, the transmission section is connected with the connecting section through the transition section, and the third limiting member is arranged on the transition section.

[0028] In some embodiments, the housing is provided with at least one first mounting portion on an outer peripheral wall thereof, and the at least one first mounting portion is configured to be fixed to a subframe of a vehicle.

[0029] In some embodiments, the at least one first mounting portion comprises a plurality of first mounting portions, and part of the first mounting portions are arranged in intervals in the axial direction of the moving member.

[0030] In some embodiments, the at least one first mounting portion comprises three first mounting portions, and the three first mounting portions are arranged in a triangular shape.

[0031] In some embodiments, the steering gear further comprises a displacement sensor disposed in the housing, the displacement sensor being configured to detect displacement of the moving member; the first mounting portion is provided with three, one of which is located on the same side of the housing as the displacement sensor, and the other two are located on the side of the housing away from the displacement sensor.

[0032] In some embodiments, the steering gear further comprises a second mounting portion provided at an end of the moving member away from the rotating member, the second mounting portion being configured to be connected to a steering knuckle of a vehicle.

[0033] In some embodiments, the steering gear further comprises a second mounting portion provided at an end of the moving member away from the rotating member, the second mounting portion being configured to be connected to a steering knuckle of a vehicle.

[0034] In some embodiments, the at least one steering gear comprises a plurality of steering gears, the plurality of steering gears comprising a left rear steering gear and a right rear steering gear, the left rear steering gear and the right rear steering gear being connected to the cross beam of the subframe.

[0035] Additional aspects and advantages of the present disclosure will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0036] The above and / or additional aspects and advantages of the present disclosure will become apparent and be readily appreciated from the following description, including the appended drawings, wherein:

[0037] FIG. 1 is a structural diagram of a steering gear according to some embodiments;

[0038] FIG. 2 is a sectional view of a partial structure of a steering gear according to some embodiments;

[0039] FIG. 3 is a partial enlarged view of circle A in FIG. 2;

[0040] FIG. 4 is a schematic diagram of a third limiting member according to some embodiments;

[0041] FIG. 5 is a structural diagram of a partial structure of a vehicle according to some embodiments;

[0042] FIG. 6 is a diagram of another partial structure of a vehicle according to some embodiments;

[0043] FIG. 7 is a schematic diagram of the cooperation between a moving member and a third limiting member according to some embodiments.

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

[0045] Embodiments of the present disclosure are described in detail below with reference to examples illustrated in the accompanying drawings, in which the same or similar components or components having the same or similar functions are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended only to explain the present disclosure, and cannot be understood as limiting the present disclosure.

[0046] In the description of the present disclosure, 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" 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 disclosure and simplifying the description, and do not indicate or imply 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 limiting the present disclosure. In addition, the features defined with "first", "second" can be explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0047] In the description of the present disclosure, it should be explained that, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the meaning of the above terms in the present disclosure can be understood by example.

[0048] In the related art, the steering gear usually drives the wheel to deflect through the movement of the screw rod. However, the structure of the steering gear and the rigidity of the screw rod itself in the related art limit the movement range of the screw rod. If the movement distance of the screw rod is too large, the screw rod is prone to breakage.

[0049] To solve the above problems, some embodiments of the present disclosure provide a steering gear 100. The steering gear 100 according to some embodiments of the present disclosure is described below with reference to the accompanying drawings.

[0050] Referring to FIGS. 1, 2 and 3, the steering gear 100 according to some embodiments of the present disclosure comprises a housing 1, a moving part 2, a rotating part 3 and a driving assembly 4. The moving part 2 is arranged in the housing 1, the moving part 2 is in transmission connection with the rotating part 3, and the driving assembly 4 is adapted to drive the rotating part 3 to move the moving part 2. The moving part 2 is adapted to be connected with a brake of a vehicle 200. When the wheel needs to be deflected, the driving assembly 4 drives the rotating part 3 to rotate, the rotating part 3 drives the moving part 2 to move, the moving part 2 drives the brake to move, thereby causing the wheel to deflect.

[0051] As shown in FIG. 2, the steering gear 100 in some embodiments of the present disclosure further comprises a first bearing 21 and a second bearing 31. The first bearing 21 is arranged between the moving part 2 and the housing 1, and the second bearing 31 is arranged between the rotating part 3 and the housing 1.

[0052] The steering gear 100 according to some embodiments of the present disclosure supports the moving part 2 by the first bearing 21, reduces the friction between the moving part 2 and the housing 1, prolongs the service life of the moving part 2 and the housing 1, and the first bearing 21 can also bear radial load, guaranteeing the coaxiality during the movement of the moving part 2 and improving the stability of the movement of the moving part 2. The housing 1 supports the rotating part 3 by the second bearing 31, reduces the friction between the rotating part 3 and the housing 1, prolongs the service life of the rotating part 3 and the housing 1, and the second bearing 31 can also bear axial load and radial load, improving the stability and smoothness of the rotation of the rotating part 3. By arranging the first bearing 21 and the second bearing 31 in the housing, the stability of the overall structure of the steering gear 100 is improved, the overall stress of the moving part is more balanced, and the risk of breakage of the moving part is reduced.

[0053] In some embodiments, the steering device 100 comprises a housing 1, a moving part 2, a rotating part 3 and a driving assembly 4. The moving part 2 is movably arranged in the housing 1 and at least partially extends out of the housing 1 so as to be connected with a brake. The rotating part 3 is rotatably arranged in the housing 1 and threadedly drives the moving part 2 for driving the moving part 2 to move. The driving assembly 4 is connected with the rotating part 3 for driving the rotating part 3 to rotate. In some embodiments of the present disclosure, the rotating part 3 threadedly drives the moving part 2, the transmission is stable, and the reliability of the steering device 100 is improved.

[0054] Referring to FIGS. 2 and 3, in some embodiments, a plurality of bearings are arranged between the rotating part 3 and the housing 1, that is, in addition to the second bearing 31, other bearings can also be arranged between the rotating part 3 and the housing 1. The plurality of bearings are arranged at intervals and collectively support the rotating part 3, further increasing the stability of the rotating part 3 and further improving the stability of the steering device 100.

[0055] In some embodiments, a plurality of bearings are arranged between the moving part 2 and the housing 1, that is, in addition to the first bearing 21, other bearings can also be arranged between the moving part 2 and the housing 1. The plurality of bearings are arranged at intervals and collectively support the moving part 2, further increasing the stability of the moving part 2 and further improving the stability of the steering device 100.

[0056] Referring to FIGS. 2 and 3, in some embodiments, the first bearing 21 is arranged between the moving part 2 and the housing 1, the second bearing 31 and the third bearing 32 are arranged between the rotating part 3 and the housing 1, and the second bearing 31 and the third bearing 32 are arranged at intervals in the axial direction of the moving part 2 (e.g., the X direction in FIG. 2).

[0057] In some embodiments of the present disclosure, the moving part 2 and the rotating part 3 are collectively supported by the three bearings, which ensures the transmission reliability of the rotating part 3 and the moving part 2 and also reduces the cost of the steering device 100.

[0058] In some embodiments, as shown in FIG. 3, the driving assembly 4 comprises a rotatable output end 40, the output end 40 is connected with the rotating part 3 to drive the rotating part 3 to rotate, and the second bearing 31 and the third bearing 32 are distributed on both sides of the output end 40.

[0059] In some embodiments of the present disclosure, the second bearing 31 and the third bearing 32 collectively support the rotating part 3, the output end 40 drives the rotating part 3 to rotate at a position between the second bearing 31 and the third bearing 32, so that the overall stress of the rotating part 3 is more balanced, the local stress is reduced, and the stability of the rotating part 3 is further improved.

[0060] With reference to FIG. 1, FIG. 2 and FIG. 3, in some embodiments, the driving assembly 4 comprises a driving motor 41, an output shaft of the driving motor 41 is provided with a first pulley, the rotating member 3 is provided with a second pulley 43, the first pulley and the second pulley 43 are transmissionally connected through a synchronous belt 42, in some embodiments of the present disclosure, the second pulley 43 is formed as the output end 40 of the driving assembly 4. The driving assembly in the embodiments of the present disclosure has simple structure, and reduces the cost of the steering device.

[0061] In some other embodiments, the driving assembly 4 comprises a driving motor 41, an output shaft of the driving motor 41 is provided with a first gear, the rotating member 3 is provided with a second gear, the first gear is in meshing cooperation with the second gear. In some embodiments of the present disclosure, the second gear is formed as the output end of the driving assembly 4.

[0062] In some other embodiments, the driving assembly 4 can be a driving motor 41 driving the rotating member 3 to rotate through a worm gear, a linkage assembly or the like, as long as the driving assembly 4 can drive the rotating member 3 to rotate, the present disclosure does not make any limitation in this regard.

[0063] In some 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.

[0064] In some embodiments of the present disclosure, in the axial direction of the moving member 2, the first bearing 21, the second bearing 31 and the third bearing 32 are spaced apart, 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 device 100, further reducing the risk of the moving member 2 breaking, and ensuring the reliability of the steering device 100 in operation.

[0065] In some embodiments, the distance between the first bearing 21 and the second bearing 31 is greater than the distance between the second bearing 31 and the third bearing 32.

[0066] The second bearing 31 and the third bearing 32 are distributed at two 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 in transmission connection with the moving member 2 and plays a role of supporting the moving member 2, and the first bearing 21 also plays a role of supporting the moving member 2.

[0067] In some embodiments of the present disclosure, the distance between the first bearing 21 and the second bearing 31 is greater than the distance between the second bearing 31 and the third bearing 32, that is, the distance between the first bearing 21 and the rotating member 3 is increased. The moving member 2 is supported by two support structures (for example, the first bearing 21 and the rotating member 3), and by increasing the distance between the two support structures, the stability of the moving member 2 can be effectively improved, and the risk of the moving member 2 breaking is further reduced. The moving member 2 can realize a longer stroke compared to the moving member in the related art, so that the moving member 2 can control the wheels to rotate a larger steering angle.

[0068] In some embodiments, the housing 1 is provided with a containing cavity 19, and the moving member 2 is arranged in the containing cavity 19, which reduces the possibility of interference between external objects and the moving member 2, and improves the stability of the movement of the moving member 2.

[0069] In some embodiments, as shown in FIG. 2, the housing 1 includes a main body 11 and a protruding portion 111, and in the axial direction of the moving member 2, the protruding portion 111 is located at the 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 part of the first bearing 21 is located between the moving member 2 and the protruding portion 111.

[0070] Because the moving member 2 is 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 of the moving member 2 that can extend outside the containing cavity 19, that is, the moving member 2 can realize a longer stroke. In some embodiments of the present disclosure, at least part of the first bearing 21 is located between the moving member 2 and the protruding portion 111, which increases the distance between the first bearing 21 and the rotating member 3, further improves the stability of the moving member 2, and further reduces the possibility of the moving member 2 breaking.

[0071] It should be noted that the first bearing 21 can be completely located between the moving member 2 and the protruding portion 111, or partially located between the moving member 2 and the protruding portion 111.

[0072] For example, in some embodiments, part of the first bearing 21 is located between the moving member 2 and the protruding portion 111, and another part of the first bearing 21 is located between the moving member 2 and the main body 11.

[0073] In some embodiments of the present disclosure, part of the first bearing 21 is supported by the main body 11, which reduces the concentrated stress on the protruding portion 111, reduces the risk of damage to the protruding portion 111, improves the overall strength of the steering device 100, and prolongs the service life of the steering device 100.

[0074] Referring to FIG. 1, FIG. 2 and FIG. 3, in some embodiments, the shell 1 comprises a main body 11 and a cover 12, the main body 11 is provided with a mounting opening at one end, the cover 12 seals the mounting opening, the second bearing 31 is arranged on the main body 11, and the third bearing 32 is arranged on the cover 12.

[0075] In some embodiments of the present disclosure, the main body 11 and the cover 12 define the above-mentioned accommodating cavity 19, when the steering gear 100 is assembled, the moving part 2 and the rotating part 3 are first placed in the main body 11 through the mounting opening, and finally the mounting opening is sealed by the cover 12, so as to seal the rotating part 3 and the moving part 2 in the shell 1, avoid the influence of external objects on the transmission between the rotating part 3 and the moving part 2, and ensure the reliability of the steering gear 100.

[0076] In some embodiments of the present disclosure, the second bearing 31 is arranged on the main body 11, and the third bearing 32 is arranged on the cover 12, when the rotating part 3 is installed, the rotating part 3 and the second bearing 31 can be connected first, and when the cover 12 seals the mounting opening, the connection between the rotating part 3 and the third bearing 32 is realized, which improves the convenience of installation of the rotating part 3 and improves the assembly efficiency of the steering gear 100.

[0077] In some embodiments, a first sealing ring is arranged between the main body 11 and the cover 12 to ensure the sealing property of the shell 1.

[0078] Referring to FIG. 1, FIG. 2 and FIG. 3, in some embodiments, the moving part 2 is configured as a lead screw, and the rotating part 3 is configured as a nut, and the nut is sleeved on the lead screw. It should be understood that, in other embodiments, the moving part 2 can also be configured as a nut, and the rotating part 3 can be configured as a lead screw, and the nut is sleeved on the lead screw. As long as the rotating part 3 can drive the moving part 2 to move when the rotating part 3 rotates.

[0079] In some embodiments, the thread angle of the lead screw is smaller than the equivalent friction angle between the nut and the lead screw, so that the thread transmission between the lead screw and the nut has self-locking property.

[0080] Through the above-mentioned embodiments, when the driving assembly 4 does not drive the rotating part 3 to rotate, the moving part 2 and the rotating part 3 have a certain self-locking property, which can keep the angle of the vehicle wheel unchanged, and ensure the stability and safety of the vehicle 200 driving. It should be noted that, in some embodiments, the movement of the moving part needs to be controlled by the software rudder function to ensure the stability of the vehicle wheel.

[0081] In some embodiments, the moving part 2 is configured as a trapezoidal lead screw, and the rotating part 3 is configured as a lead screw nut, and the lead screw nut is sleeved on the trapezoidal lead screw.

[0082] In some embodiments of the present disclosure, the moving part 2 and the rotating part 3 have simple structure, which reduces the cost of the steering gear 100.

[0083] Referring to FIGS. 2 and 7, in some embodiments, the lead screw includes a transmission section 25 and a connecting section 27, the transmission section 25 is matched with the nut, and the connecting section 27 is adapted to be connected with the knuckle 141.

[0084] In the above embodiments, the lead screw only needs to be provided with threads on the transmission section 25, and does not need to be provided with threads on the connecting section 27, which simplifies the structure of the lead screw and reduces the cost of the steering gear 100.

[0085] In some embodiments, the diameter of the transmission section 25 is smaller than the diameter of the connecting section 27.

[0086] Since the transmission section 25 is sleeved with the nut, and the nut is sleeved with the second pulley 43, in some embodiments of the present disclosure, by reducing the diameter of the transmission section 25, the diameter of the nut and the diameter of the second pulley 43 can be reduced, which is conducive to reducing the overall volume of the steering gear 100 and improving the convenience of installation of the steering gear 100.

[0087] In addition, in some embodiments of the present disclosure, the diameter of the connecting section 27 is larger, which improves the structural strength of the connecting section 27, so as to facilitate the connection of the connecting section 27 with the knuckle 141.

[0088] In some embodiments, the end of the connecting section 27 away from the transmission section 25 is provided with a threaded hole, and a bolt is screwed with the threaded hole after passing through the knuckle 141, so as to fix the knuckle 141 to the connecting section 27. In some embodiments of the present disclosure, the connection mode of the knuckle 141 with the connecting section 27 is convenient, and the connection stability is relatively high.

[0089] In some embodiments, the lead screw further includes a transition section 26, a first end of the transition section 26 is connected with the transmission section 25, and a second end of the transition section 26 is connected with the connecting section 27.

[0090] The transmission section 25 is matched with the nut, the connecting section 27 is matched with the first bearing 21, and by providing the transition section 26 between the transmission section 25 and the connecting section 27, the distance between the nut and the first bearing 21 is increased, and the stability of the lead screw as a whole is improved.

[0091] In some 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 connecting section 27.

[0092] Since the transition section 26 does not need to be connected with the knuckle 141, the diameter of the transition section 26 can be designed to be relatively smaller than the diameter of the connecting section 27, which is conducive to reducing the weight of the steering gear 100 and reducing the cost of the steering gear 100. The diameter of the transmission section 25 is smaller than the diameter of the transition section 26, which is conducive to reducing the diameter of the nut and the diameter of the second pulley 43, and is conducive to reducing the overall volume of the steering gear 100 and improving the convenience of installation of the steering gear 100.

[0093] In some embodiments, the length of the connecting section 27 is less than the length of the transmission section 25.

[0094] Since the transmission section 25 needs to always have a part to threadedly engage with the nut, in some embodiments of the present disclosure, the length of the transmission section 25 is greater than the length of the connecting section 27 in the axial direction of the moving member 2, that is, the length of the transmission section 25 threadedly engaging with the nut is increased, further improving the stability of the transmission between the nut and the transmission section 25.

[0095] In some embodiments, the length of the transition section 26 is less than the length of the connecting section 27 in the axial direction of the moving member 2.

[0096] Through the above-mentioned embodiments, 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, facilitating the miniaturization of the steering gear 100, and facilitating the installation of the steering gear 100.

[0097] Referring to FIGS. 1, 2 and 3, in some embodiments, the second bearing 31 includes an outer ring 311, an inner ring 312 and cooperating balls 313, the cooperating balls 313 are arranged between the inner ring 312 and the outer ring 311, the outer ring 311 is limitingly fitted with the housing 1 to limit the movement of the outer ring 311 relative to the housing 1, and the inner ring 312 is limitingly fitted with the rotating member 3 to limit the movement of the inner ring 312 relative to the rotating member 3.

[0098] In the above-mentioned embodiments, the outer ring 311 is limitingly fitted with the housing 1 to limit the movement of the outer ring 311 relative to the housing 1, and the inner ring 312 is limitingly fitted 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 limited, the stability of the rotation of the rotating member 3 is ensured, and the reliability of the use of the steering gear 100 is ensured.

[0099] In some embodiments, the rotating member 3 is provided with a first limiting member 33, and the first limiting member 33 abuts against the inner ring 312 to limit the movement of the inner ring 312.

[0100] In some embodiments of the present disclosure, by abutting the first limiting member 33 against the inner ring 312, the movement of the inner ring 312 is limited, and the reliability of the connection between the inner ring 312 and the rotating member 3 is ensured.

[0101] In some embodiments, the rotating member 3 is provided with a first limiting groove 34, and the two 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, so as to completely limit the movement of the inner ring 312, further reduce the possibility of movement of the inner ring 312, and ensure the reliability of the rotation of the rotating member 3. In some embodiments of the present disclosure, the movement of one side of the inner ring 312 is limited by providing the rotating member 3 with the first limiting groove 34, which reduces the cost of the steering gear 100, and the assembly mode of the inner ring 312 and the steering gear 100 is simple, which improves the assembly efficiency of the steering gear 100.

[0102] It should be understood that in other embodiments, two first limiting members 33 can also be provided on the rotating member 3, the inner ring 312 is arranged between the two first limiting members 33, and the two sides of the inner ring 312 are respectively abutted against the two first limiting members 33 to limit the movement of the inner ring 312.

[0103] In some embodiments, the first limiting member 33 is threadedly connected with the rotating member 3, the connection mode is reliable, and the assembly efficiency of the steering gear 100 is improved.

[0104] It should be understood that in some embodiments, the connection mode of the first limiting member 33 and the rotating member 3 can also be interference fit, welding, clamping and the like, which are not limited in the present disclosure.

[0105] In some embodiments, the housing 1 is provided with a second limiting member 15, and the second limiting member 15 is abutted against the outer ring 311 to limit the movement of the outer ring 311.

[0106] In some embodiments of the present disclosure, the movement of the outer ring 311 is limited by abutting the second limiting member 15 against the outer ring 311, so as to ensure the reliability of the connection between the outer ring 311 and the housing 1.

[0107] In some embodiments, the housing 1 is provided with a second limiting groove 16, and the two 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, so as to completely limit the movement of the outer ring 311, further reduce the possibility of movement of the outer ring 311, and ensure the reliability of the rotation of the housing 1. In some embodiments of the present disclosure, the movement of one side of the outer ring 311 is limited by providing the housing 1 with the second limiting groove 16, which reduces the cost of the steering gear 100, and the assembly mode of the outer ring 311 and the steering gear 100 is simple, which improves the assembly efficiency of the steering gear 100.

[0108] It should be understood that in some embodiments, two second limiters 15 can also be arranged on the shell 1, the outer ring 311 is arranged between the two second limiters 15, and the two sides of the outer ring 311 are respectively abutted with the two second limiters 15 to limit the movement of the outer ring 311.

[0109] In some embodiments, the second limiter 15 is threadedly connected with the shell 1, which has high reliability and facilitates assembly, thereby improving the assembly efficiency of the steering gear 100.

[0110] It should be understood that in some embodiments, the connection mode of the second limiter 15 and the shell 1 can also be interference fit, welding, clamping, etc., which is not limited in the present disclosure.

[0111] Referring to FIGS. 1, 2 and 3, in some 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.

[0112] Through the above embodiments, the reliability of the steering gear 100 is ensured while the cost of the steering gear 100 is reduced.

[0113] Referring to FIGS. 1, 2 and 4, in some embodiments, the moving part 2 is provided with a third limiter 23, and the third limiter 23 is slidingly connected with the shell 1 to limit the circumferential movement of the moving part 2.

[0114] Since the rotating part 3 is threadedly connected with the moving part 2, only when the moving part 2 cannot rotate, the rotating part 3 can drive the moving part 2 to move. The third limiter 23 is slidingly connected with the shell 1 to limit the circumferential movement of the moving part 2, thereby improving the stability of the movement of the moving part 2.

[0115] In some embodiments, the shell 1 is provided with a guide structure extending in the axial direction of the moving part 2, one end of the third limiter 23 is fixedly connected with the moving part 2, and the other end of the third limiter 23 is connected with the guide structure.

[0116] Through the above embodiments, the moving part 2 is slidingly connected with the shell 1 through the third limiter 23, which reduces the contact area between the moving part 2 and the shell 1, reduces the friction during the movement of the moving part 2, and improves the smoothness of the movement of the moving part 2.

[0117] In some embodiments, the third limiter 23 is provided with a sliding block, the guide structure is formed as a sliding groove 18, and at least part of the sliding block is located in the sliding groove 18. In some embodiments of the present disclosure, the sliding connection mode of the third limiter 23 and the shell 1 is simple, thereby reducing the cost of the steering gear 100.

[0118] In some embodiments, as shown in FIG. 2, the steering gear 100 further comprises a displacement sensor 5, the third limiting piece 23 is provided with a sensing piece 24, and the displacement sensor 5 is electromagnetically matched with the sensing piece 24 to detect the displacement of the moving piece 2.

[0119] The displacement sensor 5 in some embodiments of the present disclosure is adapted to be communicatively connected with a control module of the vehicle 200, so that the control module detects the position of the moving piece 2, the vehicle 200 accurately controls the deflection of the wheels, and the flexibility and safety of the vehicle 200 are improved.

[0120] Referring to FIGS. 2 and 3, in some embodiments, the third limiting piece 23 is a protruding part provided on the moving piece 2, the third limiting piece 23 extends towards the housing 1, and the end of the third limiting piece 23 away from the moving piece 2 is provided with the sensing piece 24, the sensing piece 24 is integrally formed with the sliding block, the housing 1 is provided with a sliding groove 18, and the sensing piece 24 is slidably arranged in the sliding groove 18 to realize the sliding matching of the third limiting piece 23 and the housing 1.

[0121] The housing 1 is provided with a mounting groove 17, the mounting groove 17 is communicated with the sliding groove 18, the displacement sensor 5 is arranged in the mounting groove 17, and the sensing piece 24 is arranged in the sliding groove 18 and abuts against the displacement sensor 5.

[0122] Through the above-mentioned embodiments, the distance between the sensing piece 24 and the displacement sensor 5 is reduced, the accuracy of the displacement sensor 5 detecting the position of the sensing piece 24 is improved, and the reliability of the steering gear 100 is improved.

[0123] In some embodiments, a sealing ring is arranged between the displacement sensor 5 and the inner wall of the mounting groove 17, the sealing property of the housing 1 is improved, and the risk of external objects entering the housing 1 to affect the transmission of the internal structure of the housing 1 is reduced.

[0124] Referring to FIGS. 2 and 7, in some embodiments, the third limiting piece 23 is threadedly connected to the outer peripheral wall of the transition section 26, the connection mode has high stability, is convenient for assembly, and improves the assembly efficiency of the steering gear 100.

[0125] Referring to FIGS. 2, 5 and 6, in some embodiments of the present disclosure, the steering gear 100 is adapted to be connected with the cross beam of the subframe 240 of the vehicle 200.

[0126] Compared with the technical solution in the related art that the steering gear is arranged between the subframe and the brake, in some embodiments of the present disclosure, the steering gear 100 is arranged on the cross beam of the subframe 240, the movable space of the moving piece 2 is increased, so that the displacement stroke of the moving piece 2 can be increased, which is conducive to increasing the maximum turning angle of the wheels, improving the flexibility of the vehicle 200, and avoiding the increase of the unsprung mass, and improving the handling and stability performance of the vehicle.

[0127] Referring to FIG. 2, FIG. 5 and FIG. 6, in some embodiments, the shell 1 is provided with at least one first mounting portion 13 adapted to be fixed to the subframe 240 of the vehicle 200.

[0128] In some embodiments of the present disclosure, the shell 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 a stretching space for the longer displacement stroke of the moving member 2, so as to achieve the effect of increasing the maximum turning angle of the vehicle wheel.

[0129] In some embodiments, the first mounting portion 13 is adapted to be fixed to the central position of the cross beam of the subframe 240, which further increases the movable space of the moving member 2 and is more conducive to increasing the maximum turning angle of the vehicle wheel.

[0130] In some embodiments, the first mounting portion 13 is arranged on the outer peripheral wall of the shell 1. Since the shell 1 is used to accommodate the moving member 2 which is movable along the axial direction of the moving member 2, the shell 1 is configured as a long strip structure, and the length direction of the shell 1 is parallel to the axial direction of the moving member 2. The outer peripheral wall of the shell 1 in some embodiments of the present disclosure refers to the side wall of the shell 1 arranged around the moving member 2.

[0131] In some embodiments of the present disclosure, the first mounting portion 13 is arranged on the outer peripheral wall of the shell 1, which improves the stability of the installation of the steering device 100.

[0132] In some embodiments, the at least one first mounting portion 13 includes a plurality of first mounting portions 13, and part of the first mounting portions 13 in the plurality of first mounting portions 13 are arranged at intervals along the axial direction of the moving member 2.

[0133] Through the above-mentioned embodiments, when the steering device 100 is installed on the subframe 240 of the vehicle 200, part of the first mounting portions 13 in the plurality of first mounting portions 13 are arranged along the axial direction of the moving member 2, so that the force on the steering device 100 as a whole in the axial direction of the moving member 2 is more uniform, which improves the stability of the steering device 100 as a whole when the moving member 2 moves.

[0134] In some embodiments, the at least one first mounting portion 13 includes three first mounting portions 13, and the three first mounting portions 13 are arranged in a triangular shape.

[0135] Through the above-mentioned embodiments, when the steering device 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 with the subframe 240, which further optimizes the force condition of the steering device 100 and further improves the stability of the steering device 100 as a whole.

[0136] In some embodiments, the at least one first mounting portion 13 includes three first mounting portions 13, one of the three first mounting portions 13 is located on the same side of the housing 1 as the displacement sensor 5, and the other two of the three first mounting portions 13 are located on the side of the housing 1 away from the displacement sensor 5, and the two first mounting portions 13 located on the side of the housing 1 away from the displacement sensor 5 are arranged in the axial direction of the moving member 2.

[0137] In the above embodiment, the two first mounting portions 13 are located on the side of the housing 1 away from the displacement sensor 5, which reduces the influence of the arrangement of the first mounting portion 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 arranged in a triangular shape, which further optimizes the stress condition of the steering gear 100 and further improves the stability of the steering gear 100 as a whole.

[0138] In some embodiments, the first mounting portion 13 is formed as a plurality of mounting ears 131, the plurality of mounting ears 131 are arranged at intervals, and the plurality of mounting ears 131 are provided with mounting holes 1311, and the plurality of mounting ears 131 are suitable for being connected to the subframe 240 of the vehicle 200 by fasteners passing through the mounting holes 1311.

[0139] In some embodiments of the present disclosure, the first mounting portion 13 has a simple structure, which reduces the cost of the steering gear 100, and the steering gear 100 is suitable for being fixed to the subframe 240 by the plurality of mounting ears 131, which ensures the stability of the connection between the steering gear 100 and the subframe 240.

[0140] In some embodiments, the moving member 2 is provided with a second mounting portion 14 at one end outside the housing 1, and the second mounting portion 14 is suitable for being connected to the steering knuckle of the vehicle 200.

[0141] In the related art, the steering gear is arranged between the brake and the subframe and is used as a connecting rod of a suspension arm, which not only has a small displacement stroke, but also increases the unsprung mass and affects the handling and stability performance of the vehicle.

[0142] In some embodiments of the present disclosure, the housing 1 is suitable for being fixed to the subframe 240 of the vehicle 200 by the first mounting portion 13, and the moving member 2 is suitable for being connected to the steering knuckle of the vehicle 200 by the second mounting portion 14, the steering knuckle of the vehicle 200 is connected to the brake on the wheel, and the moving member 2 is suitable for driving the wheel to deflect through the steering knuckle when moving.

[0143] In some embodiments of the present disclosure, by fixing the housing 1 of the steering gear 100 on the subframe 240 and connecting the moving part 2 of the steering gear 100 to the wheels through the steering knuckle, the displacement stroke of the moving part 2 can be increased, the maximum turning angle of the wheels is increased, the flexibility of the vehicle 200 is improved, the sprung mass is not increased, and the handling and stability performance of the vehicle is ensured.

[0144] In some embodiments, as shown in FIG. 2, the second mounting portion 14 includes a yoke 141 connected to the moving part 2 through a fastener. The yoke 141 is adapted to be connected to the rear control arm 230 of the vehicle through a bushing, and the ball head of the rear control arm 230 is connected to the steering knuckle.

[0145] Referring to FIGS. 1 and 2, in some embodiments, the steering gear 100 further includes a telescopic dust cover 6, which is sleeved on the part of the moving part 2 outside the housing 1, and the two ends of the dust cover 6 are fixed to the yoke 141 and the housing 1, respectively. By covering the part of the moving part 2 outside the housing 1 with the dust cover 6, the dust outside is prevented from entering between the moving part 2 and the housing 1 to affect the movement of the moving part 2, and the reliability of the steering gear 100 is ensured.

[0146] In some embodiments, the two ends of the dust cover 6 are fixed to the yoke 141 and the housing 1 through clamps 61, respectively. This connection method is simple, and the assembly efficiency of the steering gear 100 is improved.

[0147] Embodiments of the present disclosure are described below with reference to the accompanying drawings.

[0148] The steering gear 100 according to some embodiments of the present disclosure includes a housing 1, a moving part 2, a rotating part 3, and a driving assembly 4. The moving part 2 is movably arranged in the housing 1 and at least partially protrudes out of the housing 1, the rotating part 3 is rotatably arranged in the housing 1 and threadedly drives the moving part 2 for driving the moving part 2 to move, and the driving assembly 4 is connected to the rotating part 3 for driving the rotating part 3 to rotate.

[0149] 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 part 2 and the housing 1 for supporting the moving part 2, and the second bearing 31 and the third bearing 32 are arranged between the rotating part 3 and the housing 1 in a spaced manner for supporting the rotating part 3.

[0150] The housing 1 includes a main body 11 and a cover 12. One end of the main body 11 is provided with a mounting opening, and the cover 12 closes the mounting opening. The second bearing 31 is arranged in the main body 11, and the third bearing 32 is arranged in the cover 12. A first sealing ring is arranged between the main body 11 and the cover 12.

[0151] The moving part 2 is configured as a lead screw, the rotating part 3 is configured as a nut, and the nut is sleeved on the lead screw. The thread angle of the lead screw is smaller than the equivalent friction angle between the nut and the lead screw. The moving part 2 is configured as a trapezoidal lead screw, and the rotating part 3 is configured as a lead screw nut.

[0152] The second bearing 31 comprises an outer ring 311, an inner ring 312, and matched rolling balls 313 arranged between the inner ring 312 and the outer ring 311. The outer ring 311 is limitingly matched with the housing 1 to limit the movement of the outer ring 311 relative to the housing 1, and the inner ring 312 is limitingly matched with the rotating part 3 to limit the movement of the inner ring 312 relative to the rotating part 3.

[0153] The rotating part 3 is provided with a first limiting part 33 abutting against the inner ring 312 to limit the movement of the inner ring 312. The rotating part 3 is provided with a first limiting groove 34, and the two sides of the inner ring 312 are respectively abutted against the inner wall of the first limiting groove 34 and the first limiting part 33. The first limiting part 33 is threadedly connected with the rotating part 3.

[0154] The housing 1 is provided with a second limiting part 15 abutting against the outer ring 311 to limit the movement of the outer ring 311. The housing 1 is provided with a second limiting groove 16, and the two sides of the outer ring 311 are respectively abutted against the inner wall of the second limiting groove 16 and the second limiting part 15. The second limiting part 15 is threadedly connected with the housing 1.

[0155] 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.

[0156] The moving part 2 is provided with a third limiting part 23 in sliding fit with the housing 1 to limit the rotation degree of freedom of the moving part 2. The steering device 100 further comprises a displacement sensor 5, and the third limiting part 23 is provided with a sensing part 24 in electromagnetic fit with the displacement sensor 5 to detect the displacement of the moving part 2.

[0157] The third limiting part 23 is a protruding part arranged on the moving part 2, the third limiting part 23 is threadedly connected with the outer peripheral wall of the moving part 2, the third limiting part 23 extends towards the housing 1, one end of the third limiting part 23 away from the moving part 2 is provided with the sensing part 24, the housing 1 is provided with a sliding groove matched with the sensing part 24, and the sensing part 24 is slidably arranged in the sliding groove to realize the sliding fit between the third limiting part 23 and the housing 1.

[0158] The driving assembly 4 comprises a driving motor 41, the output shaft of the driving motor 41 is provided with a first pulley, the rotating part 3 is provided with a second pulley 43, and the first pulley and the second pulley 43 are drivingly connected through a synchronous belt 42.

[0159] The driving motor 41 is arranged outside the housing 1, and is fixed to the housing 1 by fasteners. An output shaft of the driving motor 41 extends into the housing 1, and a second sealing ring is arranged between the driving motor 41 and the housing 1 to ensure the sealing of the driving motor 41.

[0160] The housing 1 is provided with a first mounting portion 13, which is adapted to be fixed to the subframe 240 of the vehicle 200.

[0161] The steering gear 100 includes three first mounting portions 13, one of which is located on the same side of the housing 1 as the displacement sensor 5, and the other two are located on the side of the housing 1 away from the displacement sensor 5. The two first mounting portions 13 located on the side of the housing 1 away from the displacement sensor 5 are arranged in the axial direction of the moving member 2.

[0162] The first mounting portion 13 is formed as a plurality of mounting ears 131, which are arranged at intervals. Each of the mounting ears 131 is provided with a mounting hole 1311, and is adapted to be connected to the subframe 240 of the vehicle 200 by fasteners passing through the mounting hole 1311.

[0163] The moving member 2 is provided with a second mounting portion 14 at one end outside the housing 1, which is adapted to be connected to the steering knuckle of the vehicle 200.

[0164] The second mounting portion 14 includes a knuckle yoke 141, which is connected to the moving member 2 by fasteners. The knuckle yoke 141 is adapted to be connected to the rear control arm 230 of the vehicle by a bushing, and the ball head of the rear control arm 230 is connected to the steering knuckle.

[0165] The steering gear 100 further includes a telescopic dust cover 6, which is sleeved on the part of the moving member 2 outside the housing 1. The two ends of the dust cover 6 are fixed to the knuckle yoke 141 and the housing 1 by clamps 61, respectively.

[0166] Referring to FIGS. 1, 5 and 6, the vehicle 200 according to some embodiments of the present disclosure includes a subframe 240 and a steering gear 100, which is the above-mentioned steering gear 100, and is mounted to the cross beam of the subframe 240.

[0167] The vehicle 200 according to some embodiments of the present disclosure, the steering gear 100 can drive the rotating member 3 to rotate through the driving assembly 4, 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 shell 1, the abrasion of the moving member 2 and the shell 1 is avoided, the service life of the moving member 2 and the shell 1 is prolonged, through the second bearing 31 between the rotating member 3 and the shell 1, the abrasion of the rotating member 3 and the shell 1 is avoided, the service life of the rotating member 3 and the shell 1 is prolonged; the stability of the moving member 2 moving is improved through the first bearing 21, the stability of the rotating member 3 rotating is improved through the second bearing 31; the moving member 2 is supported by the first bearing 21, the rotating member 3 is supported by the second bearing 31, the structural strength of the steering gear 100 as a whole is ensured, so that the moving member 2 can realize a longer displacement stroke, the possibility of fracture of the steering gear 100 in the process of realizing a longer displacement stroke is reduced, and the reliability of the steering gear 100 is ensured; the steering gear 100 is installed on the cross beam of the sub-frame 240, the activity space of the moving member 2 is increased, the moving member 2 can realize a greater displacement stroke, the maximum turning angle of the wheels 250 is increased, and the flexibility of the vehicle 200 is improved.

[0168] Referring to FIGS. 1, 5 and 6, in some embodiments, the vehicle 200 includes a plurality of steering gears 100, and the plurality of steering gears 100 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 with the cross beam of the sub-frame 240.

[0169] The vehicle 200 includes a left rear brake 210 and a right rear brake 220, and 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 both connected through a rear control arm 230.

[0170] In this way, the displacement stroke of the steering gear 100 can be increased, and then the maximum turning angle of the rear wheels 250 is increased, the flexibility of the vehicle 200 is improved, and the sprung mass can be avoided from being increased, and the handling and stability performance of the whole vehicle is ensured.

[0171] In some embodiments, as shown in FIG. 5, the vehicle 200 includes a sub-frame 240, the left rear steering gear 101 and the right rear steering gear 102 are both fixed to the cross beam of the sub-frame 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 at the left side of the sub-frame 240, and the right rear steering gear 102 is located at the right side of the sub-frame 240.

[0172] The left rear brake 210 is mounted on the rear wheel 250 located at the left side, and the right rear brake 220 is mounted on the rear wheel 250 located at the right side. The left rear brake 210 is arranged opposite to the left rear steering gear 101 and connected through the 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 rear wheel 250 located at the left side to steer; the right rear brake 220 is arranged opposite to the right rear steering gear 102 and connected through the 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 rear wheel 250 located at the right side to steer.

[0173] It can be understood that, by fixing the steering gear 100 assembly on the cross beam of the auxiliary frame 240 and arranging the steering gear 100 to be connected with 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 larger, the maximum turning angle of the rear wheel 250 is increased, and the maximum turning angle of the rear wheel 250 can be more than 10° (for example, greater than or equal to 10°), the flexibility of the vehicle 200 is improved, and the unsprung mass of the suspension is not increased, so that the handling and stability performance of the whole vehicle is ensured. In addition, by arranging 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, and the stability during braking is improved.

[0174] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the 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 disclosure. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the described features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0175] Although the embodiments of the present disclosure have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present disclosure, and the scope of the present disclosure is defined by the claims and their equivalents.

Claims

1. A steering gear (100), comprising: a housing (1); a driving assembly (4); a moving member (2) and a rotating member (3), the moving member (2) being arranged in the housing (1), the moving member (2) being in driving connection with the rotating member (3), the driving assembly (4) being adapted to drive the rotating member (3) to move the moving member (2); a first bearing (21) arranged between the moving member (2) and the housing (1); and a second bearing (31) arranged between the rotating member (3) and the housing (1).

2. The diverter (100) of claim 1, wherein, The steering gear (100) is adapted to be connected with a cross beam of a subframe (240).

3. The steering gear (100) according to claim 1 or 2, further comprising a third bearing (32) arranged between the rotating member (3) and the housing (1), the second bearing (31) and the third bearing (32) being spaced apart in the axial direction of the moving member (2).

4. The diverter (100) of claim 3, wherein, The driving assembly (4) comprises an output end (40) connected with the rotating member (3) to drive the rotating member (3) to rotate, the second bearing (31) and the third bearing (32) being distributed on both sides of the output end (40).

5. The diverter (100) of claim 4, wherein, The driving assembly (4) further comprises: a driving motor (41); and a belt pulley arranged on the rotating member (3), the driving motor (41) being in driving connection with the belt pulley, the belt pulley being formed as the output end (40).

6. The diverter (100) according to claim 4 or 5, wherein 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).

7. The diverter (100) of claim 6, wherein, The distance between the first bearing (21) and the second bearing (31) is greater than the distance between the second bearing (31) and the third bearing (32).

8. The diverter (100) of claim 7, wherein, 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 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 part of the first bearing (21) is located between the moving member (2) and the protruding portion (111).

9. The diverter (100) of claim 8, wherein, Part of the first bearing (21) is located between the moving member (2) and the protruding portion (111), and another part of the first bearing (21) is located between the moving member (2) and the main body (11).

10. The diverter (100) according to any one of claims 1-9, wherein, The housing (1) is provided with a receiving cavity (19), and the moving member (2) is arranged in the receiving cavity (19).

11. The diverter (100) according to any one of claims 1-10, wherein, The moving member (2) is configured as a lead screw, and the rotating member (3) is configured as a nut, the nut being sleeved on the lead screw.

12. The diverter (100) of claim 11, wherein, The lead screw comprises a transmission section (25) and a connecting section (27), the transmission section (25) being matched with the nut, and the connecting section (27) being adapted to be connected with a yoke (141).

13. The diverter (100) of claim 12, wherein, The diameter of the transmission section (25) is smaller than the diameter of the connecting section (27).

14. The diverter (100) of claim 11 or 12, wherein, The lead screw further comprises a transition section (26), a first end of the transition section (26) is connected with the transmission section (25), and a second end of the transition section (26) is connected with the connecting section (27).

15. The diverter (100) of claim 14, wherein, 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 less than the diameter of the connecting section (27).

16. The diverter (100) according to claim 14 or 15, wherein In the axial direction of the moving member (2), the length of the connecting section (27) is less than the length of the transmission section (25).

17. The diverter (100) according to any one of claims 14-16, wherein, In the axial direction of the moving member (2), the length of the transition section (26) is less than the length of the connecting section (27).

18. The diverter (100) according to any one of claims 1-17, wherein, The second bearing (31) is an angular contact ball bearing. The rotating member (3) is provided with a first limiting member (33), and the housing (1) is provided with a second limiting member (15). In the axial direction of the moving member (2), the first limiting member (33) and the second limiting member (15) abut against both sides of the second bearing (31) respectively, so as to limit the movement of the second bearing (31).

19. The diverter (100) according to any one of claims 1-18, wherein, The moving member (2) is provided with a third limiting member (23), the third limiting member (23) is in sliding fit with the housing (1), so as to limit the circumferential movement of the moving member (2).

20. The diverter (100) of claim 19, wherein, The housing (1) is provided with a guide structure extending in the axial direction of the moving member (2), one end of the third limiting member (23) is connected with the moving member (2), and the other end of the third limiting member (23) is matched with the guide structure.

21. The steering gear (100) according to claim 19 or 20, further comprising a displacement sensor (5), the third limiting member (23) is provided with a sensing member (24), and the displacement sensor (5) is in electromagnetic fit with the sensing member (24) to detect the displacement of the moving member (2).

22. The diverter (100) of claim 21, wherein, The moving member (2) is configured as a lead screw, and the rotating member (3) is configured as a nut. The lead screw comprises a transmission section (25), a transition section (26) and a connecting section (27), the transmission section (25) is matched with the nut, the connecting section (27) is adapted to be connected with a yoke (141), the transmission section (25) is connected with the connecting section (27) through 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 1-22, wherein, The housing (1) is provided with at least one first mounting portion (13) on the outer peripheral wall, and the at least one first mounting portion (13) is adapted to be fixed to a subframe (240) of a vehicle (200).

24. The diverter (100) of claim 23, wherein, The at least one first mounting portion (13) comprises a plurality of first mounting portions (13), and part of the first mounting portions (13) in the plurality of first mounting portions (13) are arranged in the axial direction of the moving member (2) at intervals.

25. The diverter (100) of claim 23, wherein, The at least one first mounting portion (13) comprises three first mounting portions (13), and the three first mounting portions (13) are arranged in a triangular shape.

26. The diverter (100) according to claim 23, further comprising a displacement sensor (5) disposed within the housing (1), the displacement sensor (5) being configured to detect displacement of the moving member (2). The at least one first mounting portion (13) comprises three first mounting portions (13), one of the three first mounting portions (13) being located on the same side of the housing (1) as the displacement sensor (5), the other two of the three first mounting portions (13) being located on the side of the housing (1) away from the displacement sensor (5).

27. The diverter (100) according to any one of claims 23-26, an end of the moving member (2) away from the rotating member being provided with a second mounting portion (14), the second mounting portion (14) being adapted to be connected to a steering knuckle of a vehicle (200).

28. A vehicle (200) comprising: a subframe (240); and at least one diverter (100), the diverter (100) being the diverter (100) according to any one of claims 1-27, the diverter (100) being mounted to a cross member of the subframe (240). The at least one diverter (100) comprises a plurality of diverters (100), the plurality of diverters (100) comprising a left rear diverter (101) and a right rear diverter (102), the left rear diverter (101) and the right rear diverter (102) being connected to the cross member of the subframe (240).

29. The vehicle (200) of claim 28, wherein, ​

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