Steering gear assembly for vehicle and vehicle

Abstract

The utility model discloses a steering gear assembly for a vehicle and the vehicle, the steering gear assembly comprises a first transmission shaft, one end of the first transmission shaft is in transmission connection with a steering wheel of the vehicle, and the other end of the first transmission shaft is provided with a connecting piece; a speed reduction assembly and a first connecting end are arranged at the end, facing the first transmission shaft, of the second transmission shaft, and a second connecting end is formed on the speed reduction assembly; at least part of the first transmission shaft is selectively close to or away from the second transmission shaft so that the connecting piece can be matched with the first connecting end or the second connecting end. According to the steering gear assembly for the vehicle, the transmission ratio of the steering gear assembly can be adjusted, and the control stability of a driver is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicles, and in particular to a steering gear assembly for a vehicle and a vehicle. Background Art

[0002] In the related art, the steering gear of a vehicle is steered through the cooperation of a rack and pinion mechanism, that is, the steering wheel rotates and drives the rack to move, which in turn drives the wheel to swing for steering. However, the existing steering gear assembly has only one rack, which can be understood as the transmission ratio of the rack and pinion mechanism is fixed and cannot be adjusted. Therefore, there is only one corresponding relationship between the steering wheel angle input and the wheel angle output, which affects the steering performance of the entire vehicle. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a steering gear assembly for a vehicle, which can adjust the transmission ratio and improve the control stability of the driver.

[0004] The present application also provides a vehicle having the steering gear assembly.

[0005] A steering gear assembly for a vehicle according to an embodiment of the present application includes: a first transmission shaft, one end of which is transmission-connected to a steering wheel of the vehicle, and a connecting piece is provided at the other end of the first transmission shaft; a second transmission shaft, an end of the second transmission shaft facing the first transmission shaft is provided with a reduction assembly and a first connecting end, and a second connecting end is formed on the reduction assembly; wherein at least a portion of the first transmission shaft can be selectively moved closer to or farther away from the second transmission shaft to match the connecting piece with the first connecting end or the second connecting end.

[0006] According to the steering gear assembly for a vehicle in an embodiment of the present application, the steering gear assembly is provided with a first transmission shaft and a second transmission shaft, a connecting piece may be formed at the end of the first transmission shaft, a reduction assembly and a first connecting end may be provided on the second transmission shaft, the reduction assembly may be formed with a second connecting end, and a portion of the first transmission shaft may be moved toward or away from the second transmission shaft to dynamically connect the connecting piece to the first connecting end or the second connecting end, thereby changing the transmission ratio of the steering gear assembly, meeting the user's usage requirements, and improving the steering performance and reliability of the steering gear assembly.

[0007] In some embodiments of the present application, the second transmission shaft includes: a shaft body, a gear portion being formed at one end of the shaft body; a shell body, the shell body being connected to the other end of the shaft body, a housing cavity suitable for accommodating the reduction assembly being formed in the shell body, a first connecting end being formed on the bottom wall of the housing cavity, and a through hole communicating with the housing cavity being formed on the top end of the shell body.

[0008] In some embodiments of the present application, the connecting member is inserted into the through hole and a first bearing is further provided between the connecting member and the inner wall of the through hole.

[0009] In some embodiments of the present application, the reduction assembly includes: a ring gear, which is arranged on the inner circumferential wall of the accommodating cavity; a plurality of planetary gears, which are all arranged in the accommodating cavity and meshed with the ring gear; and a sun gear, which is arranged between the plurality of planetary gears and meshed with the plurality of planetary gears, and a second connecting end is formed on the sun gear.

[0010] In some embodiments of the present application, the end of the connecting member is provided with a limiting end that cooperates with the first connecting end or the second connecting end, the limiting end is located between the sun gear and the bottom wall of the accommodating cavity, and a limiting support foot is formed on the limiting end.

[0011] In some embodiments of the present application, a positioning piece extending in the axial direction is formed on the limiting end, and a positioning hole corresponding to the positioning piece is formed on the inner wall of the accommodating cavity and the sun gear.

[0012] In some embodiments of the present application, the positioning member is configured as an elastic positioning pin.

[0013] In some embodiments of the present application, the first transmission shaft includes: a first shaft, one end of which is transmission-connected to the steering wheel; a second shaft, at least a portion of which is accommodated in the first shaft and is power-connected to the other end of the first shaft, a connecting piece is provided at the free end of the second shaft, and the second shaft can selectively approach or move away from the second transmission shaft to cooperate with the connecting piece with the first connection end or the second connection end; the steering gear assembly also includes a driving piece, which is respectively connected to the first shaft and the second shaft and is suitable for driving the second shaft to approach or move away from the second transmission shaft.

[0014] In some embodiments of the present application, a second bearing is sleeved on the first shaft, a third bearing is sleeved on the second shaft, the driving member has an output shaft, a moving member is arranged on the output shaft, the driving member and one of the moving members are connected to the second bearing, the driving member and another of the moving members are connected to the third bearing, and the driving member is suitable for driving the moving member to move relative to the output shaft.

[0015] The following is a brief description of the vehicle in the embodiment of the present application.

[0016] According to the embodiment of the present application, the vehicle is provided with the steering gear assembly of the above-mentioned embodiment. Since the vehicle of the embodiment of the present application is provided with the steering gear assembly of the above-mentioned embodiment, the steering gear assembly of the vehicle is provided with a first transmission shaft and a second transmission shaft. The end of the first transmission shaft can be formed with a connecting piece, and the second transmission shaft can be provided with a reduction assembly and a first connecting end. The reduction assembly can be formed with a second connecting end. A portion of the first transmission shaft can be moved in a direction close to or away from the second transmission shaft to dynamically connect the connecting piece to the first connecting end or the second connecting end, thereby changing the transmission ratio of the steering gear assembly, meeting the user's usage requirements, and improving the steering performance and reliability of the vehicle.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a structural schematic diagram of a steering gear assembly according to an embodiment of the present application;

[0020] Figure 2 yes Figure 1 A partial structural diagram of the steering gear assembly;

[0021] Figure 3 yes Figure 1 A partial structural schematic diagram of the second transmission shaft;

[0022] Figure 4 yes Figure 1 A schematic front view of the second transmission shaft;

[0023] Figure 5 yes Figure 4 Schematic diagram of the cross section at AA in the middle.

[0024] Reference numerals:

[0025] 10. Steering gear assembly;

[0026] 11. first transmission shaft; 111. connecting member; 1111. limiting end; 1112. limiting support foot; 1113. positioning member;

[0027] 112, first shaft; 1121, second bearing; 113, second shaft; 1131, third bearing;

[0028] 12. second transmission shaft; 121. reduction assembly; 1211. ring gear; 1212. planetary gear; 1213. sun gear;

[0029] 1214, second connection end; 122, first connection end; 123, shaft body; 1231, gear part;

[0030] 124, housing; 1241, accommodating cavity; 1242, through hole; 125, first bearing; 126, positioning hole;

[0031] 13. Driving member; 131. Output shaft; 132. Moving member; 14. Rack. DETAILED DESCRIPTION

[0032] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0033] Reference below Figure 1-Figure 5 A steering gear assembly 10 for a vehicle according to an embodiment of the present application is described, wherein the steering gear assembly 10 includes a first transmission shaft 11 and a second transmission shaft 12, wherein one end of the first transmission shaft 11 is transmission-connected to a steering wheel of the vehicle, a connecting member 111 is provided at the other end of the first transmission shaft 11, a reduction assembly 121 and a first connecting end 122 are provided at one end of the second transmission shaft 12 facing the first transmission shaft 11, and a second connecting end 1214 is formed on the reduction assembly 121; wherein at least a portion of the first transmission shaft 11 can be selectively moved closer to or further away from the second transmission shaft 12 to mate the connecting member 111 with the first connecting end 122 or the second connecting end 1214.

[0034] At present, the steering gear of a vehicle is steered through the cooperation of a rack and pinion mechanism, that is, the steering wheel rotates and drives the rack to move, which in turn drives the wheel to swing for steering. However, the existing steering gear assembly has only one rack, which can be understood as the transmission ratio of the rack and pinion mechanism is fixed and cannot be adjusted. Therefore, there is only one corresponding relationship between the steering wheel angle input and the wheel angle output, which affects the steering performance of the entire vehicle.

[0035] like Figure 1 As shown, specifically, the steering gear assembly 10 may include a first transmission shaft 11 and a second transmission shaft 12, one end of the first transmission shaft 11 can be connected to the steering wheel of the vehicle, the other end of the first transmission shaft 11 can be provided with a connecting piece 111, the second transmission shaft 12 can be provided with a reduction mechanism and a first connecting end 122 at one end facing the first transmission shaft 11, and the other end of the second transmission shaft 12 can cooperate with the rack 14, that is, the second transmission shaft 12 can drive the rack 14 to move when it rotates, and the rack 14 can drive the vehicle to swing during the movement to achieve the steering function.

[0036] Further, the second transmission shaft 12 may be provided with a first connection end 122, and the connection member 111 may be selectively connected to the first connection end 122, so as to realize the direct connection between the first transmission shaft 11 and the second transmission shaft 12, and the first transmission shaft 11 may rotate and drive the second transmission shaft 12 to rotate synchronously, so as to realize the steering function of the steering gear assembly 10. The second transmission shaft 12 may also be provided with a reduction assembly 121, and the reduction assembly 121 may be constructed as an assembly such as a planetary gear set, a worm gear set, a bevel gear set, etc., and a second connection end 1214 may be formed on the reduction assembly 121, and the second connection end 1214 may be arranged opposite to the first connection end 122 in the axial direction. It should be noted that the axial direction referred to here may be the axial direction of the second transmission shaft 12. The connecting member 111 can be selectively connected to the second connecting end 1214, so as to realize the connection between the first transmission shaft 11 and the second transmission shaft 12 through the reduction assembly 121. Therefore, compared with the connection between the connecting member 111 and the first connecting end 122, the transmission ratio of this connection method will change. It should be noted that the increase or decrease of the transmission ratio can be set according to actual needs. The reduction assembly 121 can realize the speed increase or deceleration function through the connection method. For example, increasing the transmission ratio can reduce the turning radius of the vehicle, or reducing the transmission ratio can increase the handling performance of the vehicle when driving at high speed, reduce the power demand of the steering power motor to reduce costs, etc.

[0037] Among them, at least a portion of the first transmission shaft 11 can be selectively moved toward or away from the second transmission shaft 12, thereby matching the connecting member 111 with the first connecting end 122 or the second connecting end 1214. Specifically, when at least a portion of the first transmission shaft 11 moves toward a direction close to the second transmission shaft 12, the connecting member 111 can be matched with the first connecting end 122. At this time, the first transmission shaft 11 is directly connected to the second transmission shaft 12, and the vehicle is in an initial transmission ratio state. When at least a portion of the first transmission shaft 11 moves toward a direction away from the second transmission shaft 12, the connecting member 111 can be matched with the second connecting end 1214. At this time, the first transmission shaft 11 and the second transmission shaft 12 are connected via the reduction assembly 121, and the transmission ratio changes to adapt to different usage requirements of the vehicle.

[0038] In short, the steering gear assembly 10 of the embodiment of the present application is provided with a first transmission shaft 11 and a second transmission shaft 12, a connecting piece 111 may be formed at the end of the first transmission shaft 11, a reduction assembly 121 and a first connecting end 122 may be provided on the second transmission shaft 12, the reduction assembly 121 may be formed with a second connecting end 1214, and a portion of the first transmission shaft 11 may be moved toward or away from the second transmission shaft 12 to dynamically connect the connecting piece 111 to the first connecting end 122 or the second connecting end 1214, thereby changing the transmission ratio of the steering gear assembly 10, meeting the user's usage requirements, and improving the steering performance and reliability of the steering gear assembly 10.

[0039] like Figure 3 and Figure 4 As shown, in some embodiments of the present application, the second transmission shaft 12 may include a shaft body 123 and a housing 124, one end of the shaft body 123 may be formed with a gear portion 1231, the gear portion 1231 can cooperate with the rack 14, the shaft body 123 can drive the gear portion 1231 to rotate synchronously when rotating, the gear portion 1231 drives the rack 14 to move, and the rack 14 can drive the vehicle to swing during the movement to achieve the steering function. The housing 124 can be connected to the other end of the shaft body 123, and a receiving chamber 1241 can be formed in the housing 124, the receiving chamber 1241 can be used to receive the reduction assembly 121, and by arranging the reduction assembly 121 in the receiving chamber 1241, the space occupied by the reduction assembly 121 can be reduced, thereby reducing the space occupied by the steering gear assembly 10. The bottom wall of the accommodating cavity 1241 may be formed with a first connecting end 122, and the first connecting end 122 and the second connecting end 1214 may be arranged opposite to each other in the axial direction. The top end of the shell 124 may be formed with a through hole 1242, and the through hole 1242 may be connected to the accommodating cavity 1241. The connecting piece 111 may be inserted into the through hole 1242, thereby realizing the cooperation between the connecting piece 111 and the first connecting end 122 or the second connecting end 1214.

[0040] Furthermore, if Figure 2 As shown, a first bearing 125 can also be arranged between the connecting member 111 and the inner wall of the through hole 1242. The outer ring of the first bearing 125 can be connected to the housing 124, and the inner ring of the first bearing 125 can fit with the connecting member 111. By arranging the first bearing 125 between the connecting member 111 and the inner wall of the through hole 1242, it can be avoided that the connecting member 111 interferes with the top of the housing 124 during rotation to affect the normal rotation of the first transmission shaft 11, thereby improving the reliability of the steering gear assembly 10.

[0041] like Figure 5As shown, in some embodiments of the present application, the reduction assembly 121 may include a ring gear 1211, planetary gears 1212 and a sun gear 1213. The ring gear 1211 may be arranged on the inner circumferential wall of the accommodating cavity 1241. The planetary gear 1212 may be configured in plurality. The plurality of planetary gears 1212 may be accommodated in the accommodating cavity 1241, and the plurality of planetary gears 1212 may all be meshed with the ring gear 1211. The sun gear 1213 may be arranged between the plurality of planetary gears 1212, and the sun gear 1213 may be meshed with the plurality of planetary gears 1212, wherein: A second connecting end 1214 may be formed on the sun gear 1213. When the connecting member 111 cooperates with the second connecting end 1214, the connecting member 111 can drive the sun gear 1213 to rotate synchronously by rotating. When the sun gear 1213 rotates, it drives the planetary gear 1212 to rotate. The planetary gear 1212 drives the ring gear 1211 to rotate. Since the ring gear 1211 is fixedly connected to the inner circumferential wall of the accommodating chamber 1241, the ring gear 1211 can drive the housing 124 to rotate synchronously when rotating. The housing 124 drives the shaft 123 to rotate, thereby realizing the steering function.

[0042] like Figure 2 As shown, in some embodiments of the present application, a limit end 1111 may be provided at the end of the connecting member 111, and the limit end 1111 may cooperate with the first connecting end 122 or the second connecting end 1214, and the limit end 1111 may be located between the sun gear 1213 and the bottom wall of the accommodating cavity 1241, wherein a limit support leg 1112 may be formed on the limit end 1111, and the limit support leg 1112 may be configured as a plurality of limit support legs 1112, and the plurality of limit support legs 1112 may cooperate with the first connecting end 122 or the second connecting end 1214. 14, by setting the limiting support foot 1112, the limiting member can be easily engaged with the first connection end 122 or the second connection end 1214, ensuring that the limiting support foot 1112 can drive the shell 124 to rotate when rotating, so that the limiting member can effectively transmit power. In a specific embodiment, the limiting support foot 1112 can be constructed as 4, and the 4 limiting support feet 1112 can be arranged in a "cross" shape. The above arrangement can improve the engagement effect of the limiting member with the first connection end 122 or the second connection end 1214.

[0043] like Figure 2As shown, in some embodiments of the present application, a positioning member 1113 may be formed on the limit end 1111, and the positioning member 1113 may extend in the axial direction. A positioning hole 126 is formed on the inner wall of the accommodating cavity 1241 and the sun gear 1213. The positioning hole 126 can be arranged corresponding to the positioning member 1113, and the positioning member 1113 can play a positioning role, and the positioning member 1113 can be arranged protruding from the limit end 1111. A plurality of positioning members 1113 can be constructed, and a plurality of positioning members 1113 can be arranged at intervals on the limit end 1111. On the end 1111, the positioning holes 126 can be constructed to correspond to multiple positioning members 1113. In a specific embodiment, the positioning member 1113 can be constructed as an elastic positioning pin. Since the elastic positioning pin can have a telescopic function, the positioning member 1113 will not affect the engagement between the limit end 1111 and the first connection end 122 or the second connection end 1214 after cooperating with the positioning hole 126, and the positioning member 1113 can be appropriately increased in length to facilitate the positioning of the positioning member 1113 and the positioning hole 126.

[0044] like Figure 1 As shown, in some embodiments of the present application, the first transmission shaft 11 may include a first shaft 112 and a second shaft 113, one end of the first shaft 112 can be connected to the steering wheel transmission, at least a portion of the second shaft 113 can be accommodated in the first shaft 112, and the second shaft 113 can be dynamically connected to the other end of the first shaft 112, the free end of the second shaft 113 can be provided with a connecting member 111, and the second shaft 113 can be selectively close to or away from the second transmission shaft 12 to achieve the matching of the connecting member 111 with the first connection end 122 or the second connection end 1214, the steering gear assembly 10 may also include a driving member 13, the driving member 13 can be connected to the first shaft 112 and the second shaft 113 respectively, and the driving member 13 can drive the second shaft 113 to approach or move away from the second transmission shaft 12, thereby changing the transmission ratio of the steering gear assembly 10.

[0045] Further, the first shaft 112 may be provided with a second bearing 1121, the second shaft 113 may be provided with a third bearing 1131, the driving member 13 may have an output shaft 131, and the output shaft 131 may be provided with a moving member 132, the driving member 13 may drive the moving member 132 to move relative to the output shaft 131, wherein one of the driving member 13 and the moving member 132 may be connected to the second bearing 1121, and the other of the driving member 13 and the moving member 132 may be connected to the third bearing 1131, for example, the driving member 13 is connected to the outer ring of the second bearing 1121, the inner ring of the second bearing 1121 is connected to the first shaft 112, the moving member 132 is connected to the outer ring of the third bearing 1131, and the outer ring of the third bearing 1131 is connected to the second shaft 113. It should be noted that the first shaft 112 does not move, because Here, the driving member 13 is fixed to the second bearing 1121, and the driving member 13 also does not move. The driving member 13 drives the moving member 132 to move on the output shaft 131. When moving, the moving member 132 drives the second shaft 113 to move through the third bearing 1131, thereby realizing the movement of the second shaft 113 relative to the first shaft 112. Similarly, when the moving member 132 is connected to the outer ring of the second bearing 1121, the driving member 13 is connected to the outer ring of the third bearing 1131. Since the first shaft 112 does not move, the moving member 132 does not move either. At this time, the driving member 13 and the driving shaft move, and the driving member 13 drives the second shaft 113 to move through the third bearing 1131, thereby realizing the movement of the second shaft 113 relative to the first shaft 112. In a specific embodiment, the driving member 13 can be constructed as a driving motor, and the output shaft 131 can be constructed as a screw.

[0046] The following is a brief description of the vehicle in the embodiment of the present application.

[0047] According to the embodiment of the present application, the vehicle is provided with the steering gear assembly 10 of the above-mentioned embodiment. Since the vehicle of the embodiment of the present application is provided with the steering gear assembly 10 of the above-mentioned embodiment, the steering gear assembly 10 of the vehicle is provided with a first transmission shaft 11 and a second transmission shaft 12. The end of the first transmission shaft 11 can be formed with a connecting piece 111, and the second transmission shaft 12 can be provided with a reduction assembly 121 and a first connecting end 122. The reduction assembly 121 can be formed with a second connecting end 1214. A portion of the first transmission shaft 11 can be moved in a direction close to or away from the second transmission shaft 12 to dynamically connect the connecting piece 111 with the first connecting end 122 or the second connecting end 1214, thereby changing the transmission ratio of the steering gear assembly 10, meeting the user's usage requirements, and improving the steering performance and reliability of the vehicle.

[0048] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0049] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0050] In the description of the present application, “plurality” means two or more.

[0051] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0052] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0054] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A steering gear assembly for a vehicle, characterized in that: include: A first transmission shaft (11), one end of the first transmission shaft (11) being transmission-connected to a steering wheel of a vehicle, and the other end of the first transmission shaft (11) being provided with a connecting member (111); A second transmission shaft (12), wherein one end of the second transmission shaft (12) facing the first transmission shaft (11) is provided with a reduction assembly (121) and a first connecting end (122), and a second connecting end (1214) is formed on the reduction assembly (121); wherein At least a portion of the first transmission shaft (11) can be selectively moved closer to or farther away from the second transmission shaft (12) so as to match the connecting member (111) with the first connecting end (122) or the second connecting end (1214).

2. The steering gear assembly for a vehicle according to claim 1, characterized in that: The second transmission shaft (12) comprises: A shaft body (123), wherein a gear portion (1231) is formed at one end of the shaft body (123); A shell (124), wherein the shell (124) is connected to the other end of the shaft (123), and a receiving cavity (1241) suitable for receiving the reduction assembly (121) is formed in the shell (124), and the bottom wall of the receiving cavity (1241) is formed with the first connecting end (122), and the top end of the shell (124) is formed with a through hole (1242) connected with the receiving cavity (1241).

3. The steering gear assembly for a vehicle according to claim 2, characterized in that: The connecting member (111) is inserted into the through hole (1242), and a first bearing (125) is also provided between the connecting member (111) and the inner wall of the through hole (1242).

4. The steering gear assembly for a vehicle according to claim 2, characterized in that: The deceleration assembly (121) comprises: A gear ring (1211), the gear ring (1211) being arranged on the inner peripheral wall of the accommodating cavity (1241); a plurality of planetary gears (1212), wherein the plurality of planetary gears (1212) are all disposed in the accommodating cavity (1241) and mesh with the ring gear (1211); A sun gear (1213), wherein the sun gear (1213) is disposed between the plurality of planetary gears (1212) and meshes with the plurality of planetary gears (1212), and the second connecting end (1214) is formed on the sun gear (1213).

5. The steering gear assembly for a vehicle according to claim 4, characterized in that: The end of the connecting member (111) is provided with a limiting end (1111) that cooperates with the first connecting end (122) or the second connecting end (1214); the limiting end (1111) is located between the sun gear (1213) and the bottom wall of the accommodating cavity (1241); and a limiting support foot (1112) is formed on the limiting end (1111).

6. The steering gear assembly for a vehicle according to claim 5, characterized in that: A positioning piece (1113) extending in the axial direction is formed on the limiting end (1111), and a positioning hole (126) corresponding to the positioning piece (1113) is formed on the inner wall of the accommodating cavity (1241) and the sun gear (1213).

7. The steering gear assembly for a vehicle according to claim 6, characterized in that: The positioning member (1113) is constructed as an elastic positioning pin.

8. The steering gear assembly for a vehicle according to any one of claims 1 to 7, characterized in that: The first transmission shaft (11) comprises: A first shaft (112), one end of the first shaft (112) being drivingly connected to the steering wheel; a second shaft (113), at least a portion of the second shaft (113) being received in the first shaft (112) and being dynamically connected to the other end of the first shaft (112), a free end of the second shaft (113) being provided with the connecting member (111), and the second shaft (113) being selectively moveable toward or away from the second transmission shaft (12) so as to match the connecting member (111) with the first connecting end (122) or the second connecting end (1214); The steering gear assembly further comprises a driving member (13), wherein the driving member (13) is respectively connected to the first shaft (112) and the second shaft (113) and is suitable for driving the second shaft (113) to approach or move away from the second transmission shaft (12).

9. The steering gear assembly for a vehicle according to claim 8, characterized in that: The first shaft (112) is sleeved with a second bearing (1121), the second shaft (113) is sleeved with a third bearing (1131), the driving member (13) has an output shaft (131), a moving member (132) is arranged on the output shaft (131), one of the driving member (13) and the moving member (132) is connected to the second bearing (1121), the other of the driving member (13) and the moving member (132) is connected to the third bearing (1131), and the driving member (13) is suitable for driving the moving member (132) to move relative to the output shaft (131).

10. A vehicle, characterized in that: The invention comprises a steering gear assembly for a vehicle as claimed in any one of claims 1 to 9.

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