Transmission rod assembly of wheel steering gear, wheel steering gear and vehicle

Abstract

The invention discloses a transmission rod assembly of a wheel steering gear, the wheel steering gear and a vehicle, and the transmission rod assembly of the wheel steering gear comprises a first transmission rod which drives a first wheel to steer through the movement of the first transmission rod; the second transmission rod drives the second wheel to steer through movement of the second transmission rod; wherein the first transmission rod is provided with an avoiding space, the second transmission rod is provided with a matching part, and the matching part can extend into the avoiding space. Therefore, through the arrangement of the transmission rod assembly, when the first transmission rod and the second transmission rod move towards each other at the same time, space can be effectively saved on the basis that the enough safety distance is guaranteed, and when the transmission rod assembly is in the initial arrangement, the matching part of the second transmission rod can stretch into the avoiding space of the first transmission rod, so that the space is saved. Therefore, the axial size of the wheel steering gear can be reduced on the premise that the size of the first transmission rod and the size of the second transmission rod are not changed, and the light weight effect and the structural compactness of the wheel steering gear are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a transmission rod assembly of a wheel steering gear, a wheel steering gear and a vehicle. Background Art

[0002] With the development of modern automobile technology and the improvement of road conditions, the requirements for automobile comfort, handling and safety are getting higher and higher. In order to improve turning flexibility, vehicle straight-line driving stability and vehicle comfort, rear-wheel follow-up steering technology has been added to vehicle steering technology. That is, through this rear-wheel steering technology, when the vehicle is at a low speed or understeering occurs, the rear wheels and the front wheels rotate in opposite phases to achieve the purpose of reducing the turning radius and improving vehicle flexibility.

[0003] In the related art, there are two structural forms of rear-wheel steering control structures: one is an integrated control rear-wheel steering structure, which has a large overall structure and controls the left and right rear wheels to steer synchronously in the same direction; the other is a split-control rear-wheel steering structure, in which two transmission rods are installed on the vehicle to control the left and right rear wheel steering respectively, and the overall structure is also large. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a transmission rod assembly of a wheel steering gear, which can effectively save space while ensuring a sufficient safety distance, thereby improving the lightweight effect and compactness of the wheel steering gear.

[0005] The present invention further provides a wheel steering gear.

[0006] The present invention further provides a vehicle.

[0007] The transmission rod assembly of the wheel steering gear according to the first aspect of the present invention comprises: a first transmission rod, which drives the first wheel to steer by its own movement; and a second transmission rod, which drives the second wheel to steer by its own movement; wherein the first transmission rod is provided with an avoidance space, and the second transmission rod is provided with a matching portion, and the matching portion can extend into the avoidance space.

[0008] Therefore, by setting up the transmission rod assembly, when the first transmission rod and the second transmission rod move toward each other at the same time, space can be effectively saved while ensuring a sufficient safety distance. Moreover, when the transmission rod assembly is in the initial setting, the matching portion of the second transmission rod can extend into the avoidance space of the first transmission rod, thereby reducing the axial size of the wheel steering gear while keeping the sizes of the first transmission rod and the second transmission rod unchanged, thereby improving the lightweight effect and structural compactness of the wheel steering gear.

[0009] In some examples of the present invention, after the matching portion extends into the avoidance space, the matching portion is spaced apart from an inner wall of the avoidance space.

[0010] In some examples of the present invention, an end surface of the first transmission rod adjacent to one end of the second transmission rod is provided with an avoidance hole, and the avoidance hole forms the avoidance space; and the matching portion is formed at one end of the second transmission rod adjacent to the first transmission rod.

[0011] In some examples of the present invention, the cross-section of the avoidance hole in a direction perpendicular to the axial direction of the first transmission rod is circular, and the cross-section of the matching portion in a direction perpendicular to the axial direction of the second transmission rod is circular matching the cross-sectional shape of the avoidance hole.

[0012] In some examples of the present invention, the first transmission rod includes a first rod segment and a second rod segment, the avoidance hole is formed in the first rod segment, the second rod segment is connected to an end of the first rod segment away from the second transmission rod, and the cross-sectional area of ​​the second rod segment is larger than the cross-sectional area of ​​the first rod segment; the second transmission rod includes a third rod segment and a fourth rod segment, the matching portion is formed in the third rod segment, the fourth rod segment is connected to an end of the third rod segment away from the first transmission rod, and the cross-sectional area of ​​the third rod segment is smaller than the cross-sectional area of ​​the fourth rod segment.

[0013] In some examples of the present invention, the central axis of the first transmission rod coincides with the central axis of the second transmission rod, the first transmission rod drives the first wheel to steer by moving along its own central axis, and the second transmission rod drives the second wheel to steer by moving along its own central axis.

[0014] The wheel steering gear according to the second aspect of the present invention comprises: the transmission rod assembly of the wheel steering gear mentioned above; a first driving mechanism, which is connected to the first transmission rod to drive the first transmission rod to move; and a second driving mechanism, which is connected to the second transmission rod to drive the second transmission rod to move.

[0015] In some examples of the present invention, the wheel steering gear also includes: a first screw sleeve, the first transmission rod is a first screw and is threadedly matched with the first screw sleeve, the first driving mechanism is transmission-connected with the first screw sleeve, and the first driving mechanism drives the first screw sleeve to rotate to drive the first transmission rod to move; a second screw sleeve, the second transmission rod is a second screw and is threadedly matched with the second screw sleeve, the second driving mechanism is transmission-connected with the second screw sleeve, and the second driving mechanism drives the second transmission rod to move by driving the second screw sleeve to rotate.

[0016] In some examples of the present invention, an accommodation space is provided at one end of the second screw sleeve adjacent to the first screw, and one end of the first transmission rod adjacent to the second transmission rod can extend into the accommodation space.

[0017] In some examples of the present invention, after one end of the first transmission rod adjacent to the second transmission rod extends into the accommodating space, the first transmission rod is spaced apart from an inner wall of the accommodating space.

[0018] In some examples of the present invention, an end surface of the second screw sleeve adjacent to one end of the first transmission rod is provided with a receiving hole, and the receiving hole forms the receiving space.

[0019] In some examples of the present invention, the cross-section of the accommodating hole in a direction perpendicular to the axial direction of the first screw sleeve is circular, and the outer contour of the cross-section of one end of the first screw adjacent to the second screw in a direction perpendicular to the axial direction of the first screw is a circle that matches the cross-sectional shape of the accommodating hole.

[0020] In some examples of the present invention, the wheel steering gear further includes: a housing, in which the first screw rod, the second screw rod, the first screw rod sleeve and the second screw rod sleeve are installed.

[0021] In some examples of the present invention, the shell includes: a first shell, the first shell forms the first installation space, the first screw rod and the first screw rod sleeve are arranged in the first installation space; a second shell, the second shell is connected to the first shell, the second shell forms the second installation space, the first installation space and the second installation space are connected, and the second transmission rod is arranged in the second installation space.

[0022] In some examples of the present invention, the shell further includes: a sealing member, a first sealing surface is provided on the side of the first shell facing the second shell, a second sealing surface is provided on the side of the second shell facing the first shell, and the sealing member is sealed with the first sealing surface and the second sealing surface respectively.

[0023] In some examples of the present invention, the first sealing surface, the second sealing surface and the sealing element are configured into mutually matching annular shapes, and at least one of the first sealing surface and the second sealing surface is provided with a sealing groove for accommodating the sealing element.

[0024] In some examples of the present invention, the wheel steering gear also includes: a first limit member, the first limit member is installed on one of the housing and the first screw rod, and the first limit member is movably matched with the other of the housing and the first screw rod along the axial direction of the first screw rod; a second limit member, the second limit member is installed on one of the housing and the second screw rod, and the second limit member is movably matched with the other of the housing and the second screw rod along the axial direction of the second screw rod.

[0025] In some examples of the present invention, the shell is provided with a first slide groove and a second slide groove, the first slide groove extends along the axial direction of the first screw rod, the second slide groove extends along the axial direction of the second screw rod, the first limit member is installed on the first screw rod and cooperates with the first slide groove, and the second limit member is installed on the second screw rod and cooperates with the second slide groove.

[0026] In some examples of the present invention, the first driving mechanism includes a first driving member and a first transmission assembly, and the first transmission assembly is respectively connected to the first driving member and the first screw sleeve; the second driving mechanism includes a second driving member and a second transmission assembly, and the second transmission assembly is respectively connected to the second driving member and the second screw sleeve.

[0027] In some examples of the present invention, the first transmission assembly includes a first transmission wheel and a second transmission wheel, the first transmission wheel is connected to the first driving member, the second transmission wheel is in transmission cooperation with the first transmission wheel, and the second transmission wheel is connected to the first screw sleeve; the second transmission assembly includes a third transmission wheel and a fourth transmission wheel, the third transmission wheel is connected to the second driving member, the fourth transmission wheel is in transmission cooperation with the third transmission wheel, and the fourth transmission wheel is connected to the second screw sleeve.

[0028] In some examples of the present invention, the second transmission wheel is sleeved on the first screw sleeve and has an interference fit with the first screw sleeve; and / or the fourth transmission wheel is sleeved on the second screw sleeve and has an interference fit with the second screw sleeve.

[0029] In some examples of the present invention, the first transmission assembly further includes a first transmission belt, which is respectively in transmission cooperation with the first transmission wheel and the second transmission wheel; and / or the second transmission assembly further includes a second transmission belt, which is respectively in transmission cooperation with the third transmission wheel and the fourth transmission wheel.

[0030] The vehicle according to the third aspect of the present invention comprises: a first wheel and a second wheel; and the above-mentioned wheel steering gear.

[0031] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0033] Figure 1 is a cross-sectional structural diagram of a wheel steering gear according to an embodiment of the present invention;

[0034] Figure 2 is another cross-sectional structural diagram of a wheel steering gear according to an embodiment of the present invention;

[0035] Figure 3 yes Figure 2 A partial enlarged view of the middle A area;

[0036] Figure 4 is a cross-sectional view of a first transmission rod according to an embodiment of the present invention;

[0037] Figure 5 is a cross-sectional view of a second transmission rod according to an embodiment of the present invention.

[0038] Reference numerals:

[0039] 100, transmission rod assembly; 200, wheel steering gear;

[0040] 1. first transmission rod; 11. avoidance space; 12. avoidance hole; 13. first rod section; 14. second rod section; 15. first mounting hole; 16. first limit part;

[0041] 2. second transmission rod; 21. matching portion; 22. third rod segment; 23. fourth rod segment; 24. second mounting hole; 25. second limiting portion;

[0042] 201, first driving mechanism; 2011, first driving member; 2012, first transmission assembly; 20121, first transmission wheel; 20122, second transmission wheel; 20123, first transmission belt;

[0043] 202, second driving mechanism; 2021, second driving member; 2022, second transmission assembly; 20221, third transmission wheel; 20222, fourth transmission wheel; 20223, second transmission belt;

[0044] 203, housing; 2031, third limiting portion; 2032, fourth limiting portion; 2033, first housing; 20331, first installation space; 20332, first sealing surface; 2034, second housing; 20341, second installation space; 20342, second sealing surface; 2035, sealing member; 2036, sealing groove;

[0045] 204, first screw rod sleeve;

[0046] 205, second screw rod sleeve; 2051, accommodation space; 2052, accommodation hole;

[0047] 206, first stopper; 207, second stopper; 208, first sliding bearing; 209, second sliding bearing; 210, first ball bearing; 211, second ball bearing;

[0048] 212, first locking nut; 213, second locking nut;

[0049] 214. First locking screw plug; 215. Second locking screw plug; 216. First swing arm connecting piece; 217. Second swing arm connecting piece. DETAILED DESCRIPTION

[0050] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0051] Reference below Figure 1-Figure 5 The transmission rod assembly 100 of the wheel steering gear 200 according to the embodiment of the present invention is described, which can save space and ensure a sufficient safety distance, thereby improving the lightweight effect and structural compactness of the wheel steering gear 200. The wheel steering gear 200 can be a front wheel steering gear or a rear wheel steering gear, and it will be described as a rear wheel steering gear below.

[0052] Combination Figure 1-Figure 5 As shown, the transmission rod assembly 100 of the wheel steering gear 200 according to the first aspect of the embodiment of the present invention includes a first transmission rod 1 and a second transmission rod 2. The first transmission rod 1 drives the first wheel to steer by its own movement, and the second transmission rod 2 drives the second wheel to steer by its own movement, wherein the first transmission rod 1 is provided with an avoidance space 11, and the second transmission rod 2 is provided with a matching portion 21, and the matching portion 21 can extend into the avoidance space 11.

[0053] For example, the first wheel can be a left wheel, and the second wheel can be a right wheel. The first transmission rod 1 and the second transmission rod 2 can both move along their own axial direction, and can drive the first wheel and the second wheel connected thereto to turn. When the first transmission rod 1 and the second transmission rod 2 are retracted from the outside to the inside at the same time (i.e., the first transmission rod 1 and the second transmission rod 2 are approaching each other), the matching portion 21 on the second transmission rod 2 can extend into the avoidance space 11 at the first transmission rod 1, so that the end faces of the first transmission rod 1 and the second transmission rod 2 can be prevented from colliding prematurely, and the first transmission rod 1 and the second transmission rod 2 can be ensured to have a sufficient safety distance.

[0054] Moreover, when initially set up, the matching portion 21 of the second transmission rod 2 can extend into the avoidance space 11 of the first transmission rod 1, which can reduce the axial size of the wheel steering gear 200 while keeping the sizes of the first transmission rod 1 and the second transmission rod 2 unchanged. It can also effectively reduce the moving space required for the first transmission rod 1 and the second transmission rod 2 in the wheel steering gear 200, thereby effectively saving space and further improving the compactness of the spatial structure of the wheel steering gear 200.

[0055] Therefore, by setting up the transmission rod assembly 100, when the first transmission rod 1 and the second transmission rod 2 move toward each other at the same time, space can be effectively saved while ensuring a sufficient safety distance. Moreover, when the transmission rod assembly 100 is in the initial setting, the matching portion 21 of the second transmission rod 2 can extend into the avoidance space 11 of the first transmission rod 1, thereby reducing the axial size of the wheel steering gear 200 while keeping the sizes of the first transmission rod 1 and the second transmission rod 2 unchanged, thereby improving the lightweight effect and structural compactness of the wheel steering gear 200.

[0056] According to some optional embodiments of the present invention, after the matching portion 21 extends into the avoidance space 11, the matching portion 21 is spaced apart from the inner wall of the avoidance space 11. In detail, as the first transmission rod 1 and the second transmission rod 2 approach each other, the matching portion 21 gradually and completely extends into the avoidance space 11 along the axial direction of the second transmission rod 2. At this time, the matching portion 21 still maintains a safe distance from the inner wall of the avoidance space 11, thereby preventing the second transmission rod 2 from colliding with the first transmission rod 1 and causing structural damage.

[0057] According to some optional embodiments of the present invention, in combination Figure 1-Figure 5As shown, the end surface of the first transmission rod 1 adjacent to the second transmission rod 2 is provided with a avoidance hole 12, and the avoidance hole 12 forms a avoidance space 11; the matching portion 21 is formed at the end of the second transmission rod 2 adjacent to the first transmission rod 1. In the axial direction, the first transmission rod 1 is provided with a avoidance hole 12 at the end surface of the first transmission rod 1 adjacent to the second transmission rod 2, and the avoidance space 11 is defined inside the avoidance hole 12; the second transmission rod 2 is formed with a matching portion 21 at the end adjacent to the first transmission rod 1, so that the matching portion 21 is convenient to extend into the avoidance space 11 first, thereby improving its design rationality.

[0058] Specifically, combined Figure 1-Figure 5 As shown, the cross section of the avoidance hole 12 in the direction perpendicular to the axial direction of the first transmission rod 1 is circular, and the cross section of the matching portion 21 in the direction perpendicular to the axial direction of the second transmission rod 2 is circular and matches the cross section of the avoidance hole 12. It can be understood that the avoidance hole 12 is a circular hole opened in the axial direction of the first transmission rod 1, which is more convenient for machining and can improve machining efficiency compared to the avoidance holes 12 with other shapes; the cross section of the matching portion 21 in the direction perpendicular to the axial direction of the second transmission rod 2 is also circular, which can match the avoidance hole 12 on the one hand, and can also facilitate machining and improve machining efficiency on the other hand, thereby reducing its manufacturing cost.

[0059] Furthermore, combined with Figure 1-Figure 5 As shown, the first transmission rod 1 includes a first rod segment 13 and a second rod segment 14, the avoidance hole 12 is formed in the first rod segment 13, the second rod segment 14 is connected to the end of the first rod segment 13 away from the second transmission rod 2, and the cross-sectional area of ​​the second rod segment 14 is larger than the cross-sectional area of ​​the first rod segment 13; the second transmission rod 2 includes a third rod segment 22 and a fourth rod segment 23, the matching portion 21 is formed in the third rod segment 22, the fourth rod segment 23 is connected to the end of the third rod segment 22 away from the first transmission rod 1, and the cross-sectional area of ​​the third rod segment 22 is smaller than the cross-sectional area of ​​the fourth rod segment 23.

[0060] For example, along the axial direction, the first rod segment 13 and the second rod segment 14 are connected to each other, and the cross-sectional area of ​​the second rod segment 14 is larger than the cross-sectional area of ​​the first rod segment 13. In this way, a first transmission rod 1 with rod segments of different axial diameters can be formed, so that installation parts with different inner diameters can be positioned to match, thereby limiting the movement of parts on the first transmission rod 1 along the axial direction, preventing the parts on the first transmission rod 1 from slipping during operation; and on the basis of ensuring that the first transmission rod 1 has sufficient structural strength, the axial diameter of the first rod segment 13 can be reduced, thereby improving the lightweight effect of the transmission rod assembly 100.

[0061] For another example, along the axial direction, the third rod segment 22 and the fourth rod segment 23 are connected to each other, and the cross-sectional area of ​​the fourth rod segment 23 is larger than the cross-sectional area of ​​the third rod segment 22. In this way, a second transmission rod 2 with rod segments of different axial diameters can be formed, so that installation parts with different inner diameters can be positioned and matched, thereby limiting the movement of parts on the second transmission rod 2 along the axial direction, and preventing the parts on the second transmission rod 2 from slipping during operation; and on the basis of ensuring that the second transmission rod 2 has sufficient structural strength, the axial diameter of the third rod segment 22 can be reduced, thereby improving the lightweight effect of the transmission rod assembly 100, facilitating the matching of the matching portion 21 and the avoidance space 11, and also facilitating the subsequent arrangement of the first screw sleeve 204 and the second screw sleeve 205.

[0062] Specifically, combined Figure 1-Figure 2 As shown, the central axis of the first transmission rod 1 coincides with the central axis of the second transmission rod 2. The first transmission rod 1 drives the first wheel to steer by moving along its own central axis, and the second transmission rod 2 drives the second wheel to steer by moving along its own central axis.

[0063] The central axes of the first transmission rod 1 and the second transmission rod 2 coincide with each other, so that the matching portion 21 on the second transmission rod 2 can be aligned with the avoidance space 11 of the first transmission rod 1 to the greatest extent, thereby effectively avoiding the probability of the matching portion 21 colliding with the first transmission rod 1. In addition, the first transmission rod 1 and the second transmission rod 2 move along their respective central axes to drive the first wheel and the second wheel, so that the movement stability of the first transmission rod 1 and the second transmission rod 2 can be ensured.

[0064] Combination Figure 1-Figure 5 As shown, the wheel steering device 200 according to the second embodiment of the present invention comprises the transmission rod assembly 100, the first driving mechanism 201 and the second driving mechanism 202 of the wheel steering device 200 of the above embodiment, the first driving mechanism 201 is connected to the first transmission rod 1 to drive the first transmission rod 1 to move, and the second driving mechanism 202 is connected to the second transmission rod 2 to drive the second transmission rod 2 to move. Among them, the first driving mechanism 201 and the second driving mechanism 202 can provide the first transmission rod 1 and the second transmission rod 2 with moving power respectively, so as to play the role of driving the first transmission rod 1 and the second transmission rod 2 to move, thereby achieving the effect that the first transmission rod 1 and the second transmission rod 2 drive the first wheel and the second wheel to steer by moving themselves.

[0065] According to some optional embodiments of the present invention, Figure 1-Figure 5As shown, the wheel steering gear 200 also includes a housing 203, a first screw sleeve 204 and a second screw sleeve 205. The first drive mechanism 201, the second drive mechanism 202, the first transmission rod 1 and the second transmission rod 2 are installed in the housing 203. The housing 203 can protect and install the internal structure.

[0066] Specifically, the first transmission rod 1 is a first screw rod, and the first screw rod is threadedly matched with the first screw rod sleeve 204, the first driving mechanism 201 is in transmission connection with the first screw rod sleeve 204, and the first driving mechanism 201 drives the first transmission rod 1 to move by driving the first screw rod sleeve 204 to rotate. For example, an external thread is provided on the outer periphery of the first screw rod, and an internal thread is provided on the inner wall of the first screw rod sleeve 204, and the external thread on the first screw rod and the internal thread of the first screw rod sleeve 204 are threadedly matched with each other, and the first screw rod sleeve 204 is in transmission connection with the first driving mechanism 201, so that the first screw rod can be driven to move along the thread by driving the first screw rod sleeve 204 to rotate (that is, the rotational motion of the first screw rod is converted into a linear motion along its own axial direction), so as to achieve the effect of the first screw rod extending or retracting along its own axial direction.

[0067] Furthermore, combined with Figure 1-Figure 5 As shown, the second transmission rod 2 is a second screw rod, and the second screw rod is threadedly matched with the second screw rod sleeve 205, the second driving mechanism 202 is in transmission connection with the second screw rod sleeve 205, and the second driving mechanism 202 drives the second screw rod sleeve 205 to rotate to drive the second transmission rod 2 to move. Among them, the first screw rod, the second screw rod, the first screw rod sleeve 204 and the second screw rod sleeve 205 are all installed in the housing 203, so there is no need to set up a separate housing, which can save more installation space, thereby facilitating the miniaturization and lightweight of the overall structure. .

[0068] For example, an external thread is provided on the outer periphery of the second screw rod, and an internal thread is provided on the inner wall of the second screw rod sleeve 205. The external thread on the second screw rod and the internal thread of the second screw rod sleeve 205 are threadedly matched with each other. At the same time, the second screw rod sleeve 205 is connected to the second driving mechanism 202 for mutual transmission. In this way, the second screw rod can be driven to move along the thread by driving the second screw rod sleeve 205 to rotate (that is, the rotational motion of the second screw rod is converted into linear motion along its own axis), thereby achieving the effect of the second screw rod extending or retracting along its own axis.

[0069] Specifically, combined Figure 1-Figure 5As shown, an end of the second screw sleeve 205 adjacent to the first screw is provided with a receiving space 2051, and an end of the first transmission rod 1 adjacent to the second transmission rod 2 can extend into the receiving space 2051. When the first transmission rod 1 and the second transmission rod 2 simultaneously approach each other from the outside to the inside, the end of the first transmission rod 1 adjacent to the second transmission rod 2 can gradually extend into the receiving space 2051 at the end of the second screw sleeve 205 adjacent to the first screw, so that a mutually nested staggered arrangement can be formed (that is, the matching portion 21 of the second transmission rod 2 extends into the avoidance space 11 of the first transmission rod 1, and part of the first transmission rod 1 extends into the receiving space 2051 of the second screw sleeve 205), which can further shorten the axial space, thereby improving the compactness of the spatial structure of the wheel steering gear 200.

[0070] Furthermore, combined with Figure 1-Figure 5 As shown, after the end of the first transmission rod 1 adjacent to the second transmission rod 2 extends into the accommodation space 2051, the first transmission rod 1 is spaced apart from the inner wall of the accommodation space 2051. As the first transmission rod 1 and the second transmission rod 2 approach each other, the end of the first transmission rod 1 adjacent to the second transmission rod 2 gradually and completely extends into the accommodation space 2051 along the axial direction. At this time, the end of the first transmission rod 1 adjacent to the second transmission rod 2 still maintains a safe distance from the inner wall of the accommodation space 2051, so as to prevent the first transmission rod 1 from colliding with the second screw sleeve 205 and causing structural damage.

[0071] Specifically, combined Figure 1-Figure 2 As shown, the end surface of the second screw sleeve 205 adjacent to the first transmission rod 1 is provided with a receiving hole 2052, and the receiving hole 2052 forms a receiving space 2051. In the axial direction, the second screw sleeve 205 is provided with a receiving hole 2052 on its end surface adjacent to the first transmission rod 1, and the interior of the receiving hole 2052 defines a receiving space 2051, so that the end of the first transmission rod 1 adjacent to the second transmission rod 2 can be extended into the receiving space 2051 first, thereby improving its design rationality.

[0072] Furthermore, combined with Figure 1-Figure 2 As shown, the cross-section of the receiving hole 2052 perpendicular to the axial direction of the first screw sleeve 204 is circular, and the outer contour of the cross-section of one end of the first screw adjacent to the second screw perpendicular to the axial direction of the first screw is circular to match the cross-sectional shape of the receiving hole 2052.

[0073] It can be understood that the accommodating hole 2052 is a circular hole opened along the axial direction of the first screw sleeve 204. Compared with opening the accommodating hole 2052 of other shapes, this is easier to machine and can improve the processing efficiency; the cross-section of the end of the first screw rod adjacent to the second screw rod in the direction perpendicular to the axial direction of the first screw rod is also circular, which can adapt to the accommodating hole 2052 on the one hand, and can also facilitate machining on the other hand, improve processing efficiency, thereby reducing its manufacturing cost.

[0074] Specifically, combined Figure 1 As shown, the housing 203 includes a first housing 2033 and a second housing 2034. The first housing 2033 is formed with a first installation space 20331. The second housing 2034 is connected to the first housing 2033. The second housing 2034 is formed with a second installation space 20341. The first installation space 20331 is connected to the second installation space 20341. For example, the first housing 2033 may be the left housing 203, and the second housing 2034 may be the right housing 203.

[0075] Optionally, the housing 203 is formed by connecting a first housing 2033 and a second housing 2034. The exterior of the first housing 2033 and the second housing 2034 can provide more and more flexible mounting points for matching with the rear subframe of the vehicle, thereby improving the overall connection reliability and flexibility of the rear wheel steering device 200. In addition, the first installation space 20331 and the second installation space 20341 are interconnected, which can divide the space boundary on the one hand, and on the other hand, can jointly form a larger installation space, thereby improving the rationality of its spatial layout.

[0076] Specifically, combined Figure 1-Figure 3 As shown, the housing 203 further includes a sealing member 2035. A first sealing surface 20332 is provided on the side of the first housing 2033 facing the second housing 2034, and a second sealing surface 20342 is provided on the side of the second housing 2034 facing the first housing 2033. The sealing member 2035 is respectively sealed with the first sealing surface 20332 and the second sealing surface 20342. In the left-right direction, the first housing 2033 and the second housing 2034 are respectively formed with a first sealing surface 20332 and a second sealing surface 20342 on their end surfaces facing each other. The sealing member 2035 is filled and sealed between the first sealing surface 20332 and the second sealing surface 20342, so that the sealing property inside the housing 203 can be improved, and dust and water from the outside can be prevented from entering the housing 203.

[0077] Furthermore, combined with Figure 1-Figure 3As shown, the first sealing surface 20332, the second sealing surface 20342 and the sealing member 2035 are configured to be mutually adapted to each other in an annular shape, and at least one of the first sealing surface 20332 and the second sealing surface 20342 is provided with a sealing groove 2036 for accommodating the sealing member 2035. The sealing member 2035 performs sealing along the circumferential direction of the housing 203, and the first sealing surface 20332, the second sealing surface 20342 and the sealing member 2035 are configured to be mutually adapted to each other in an annular shape, so that the sealing reliability can be improved. Optionally, a sealing groove 2036 is provided on the first sealing surface 20332, so that an accurate installation position can be provided for the sealing member 2035 to prevent it from shaking easily.

[0078] Specifically, the first shell 2033 and the second shell 2034 are connected by fasteners. The fasteners connect the first shell 2033 and the second shell 2034 into a whole, so that the structural strength and spatial mode of each other can be enhanced, thereby improving the overall structural reliability.

[0079] Specifically, combined Figure 1-Figure 2 As shown, the wheel steering gear 200 also includes a first limit member 206 and a second limit member 207. The first limit member 206 is installed on one of the housing 203 and the first screw rod, and the first limit member 206 is movably matched with the housing 203 and the other of the first screw rod along the axial direction of the first screw rod. The second limit member 207 is installed on one of the housing 203 and the second screw rod, and the second limit member 207 is movably matched with the other of the housing 203 and the second screw rod along the axial direction of the second screw rod.

[0080] For example, when the first limit member 206 is installed on the first screw rod, the first limit member 206 and the shell 203 are movably matched along the axial direction of the first screw rod. This can limit the circumferential rotation of the first screw rod on the one hand, and allow the first screw rod to move along its own axial direction on the other hand, thereby ensuring that the first screw rod can convert its relative rotational motion with the first screw rod sleeve 204 into axial linear motion.

[0081] For another example, when the second limit member 207 is installed on the second screw rod, the second limit member 207 and the shell 203 are movably matched along the axial direction of the second screw rod. This can limit the circumferential rotation of the second screw rod on the one hand, and allow the second screw rod to move along its own axial direction on the other hand, thereby ensuring that the second screw rod can convert its relative rotational motion with the second screw rod sleeve 205 into axial linear motion.

[0082] Furthermore, the shell 203 is provided with a first slide groove and a second slide groove, the first slide groove extends along the axial direction of the first screw rod, the second slide groove extends along the axial direction of the second screw rod, the first limit member 206 is installed on the first screw rod and cooperates with the first slide groove, and the second limit member 207 is installed on the second screw rod and cooperates with the second slide groove.

[0083] Among them, a first slide groove and a second slide groove are arranged on the shell 203 along the axial direction, and the first limit member 206 on the first screw rod and the second limit member 207 on the second screw rod are slidably matched with the first slide groove and the second slide groove respectively, so that the first limit member 206 and the second limit member 207 can respectively drive the first screw rod and the second screw rod to move along the specified path, thereby ensuring the movement accuracy and stability of the first screw rod and the second screw rod.

[0084] Specifically, combined Figure 1-Figure 2 As shown, the first screw rod is constructed with a first mounting hole 15 penetrating along its radial direction, and the first limiter 206 is disposed in the first mounting hole 15 ; the second screw rod is constructed with a second mounting hole 24 penetrating along its radial direction, and the second limiter 207 is disposed in the second mounting hole 24 .

[0085] It can be understood that the first limit member 206 is inserted into the first mounting hole 15 which penetrates the first screw rod along its own radial direction, so that the first limit member 206 can be easily extended out of the outer peripheral edge of the first screw rod in the radial direction, thereby cooperating with the first slide groove while limiting the circumferential rotation of the first screw rod, thereby ensuring that the first screw rod can move along its own axial direction; the second limit member 207 is inserted into the second mounting hole 24 which penetrates the second screw rod along its own radial direction, so that the second limit member 207 can be easily extended out of the outer peripheral edge of the second screw rod in the radial direction, thereby cooperating with the second slide groove while limiting the circumferential rotation of the second screw rod, thereby ensuring that the second screw rod can move along its own axial direction.

[0086] Furthermore, combined with Figure 1-Figure 2 As shown, the first screw rod is provided with a first limiting portion 16, the second screw rod is provided with a second limiting portion 25, and the housing 203 is provided with a third limiting portion 2031 and a fourth limiting portion 2032; the third limiting portion 2031 stops the first limiting portion 16 to limit the extreme position of the first screw rod moving in the direction away from the second screw rod; the fourth limiting portion 2032 stops the second limiting portion 25 to limit the extreme position of the second screw rod moving in the direction away from the first screw rod.

[0087] Among them, the third limiting portion 2031 on the shell 203 can form a stopping effect on the first limiting portion 16 on the first screw rod in the axial direction, so as to prevent the first screw rod from moving too much in the direction away from the second screw rod, that is, to limit the maximum moving distance of the first screw rod in the direction away from the second screw rod, thereby ensuring that the first screw rod can have a reasonable and controllable moving range; the fourth limiting portion 2032 on the shell 203 can form a stopping effect on the second limiting portion 25 on the second screw rod in the axial direction, so as to prevent the second screw rod from moving too much in the direction away from the first screw rod, that is, to limit the maximum moving distance of the second screw rod in the direction away from the first screw rod, thereby ensuring that the second screw rod can have a reasonable and controllable moving range.

[0088] Specifically, combined Figure 1-Figure 5 As shown, the first limiting portion 16 is configured as a first shoulder, the third limiting portion 2031 is configured as a first boss protruding toward the first screw rod; and / or the second limiting portion 25 is configured as a second shoulder, and the fourth limiting portion 2032 is configured as a second boss protruding toward the second screw rod.

[0089] It can be understood that the first shoulder protrudes outward along the radial direction of the first screw rod, so that the first boss protruding toward the first screw rod can form a blocking effect on the first shoulder in the axial direction, thereby achieving the effect of limiting the axial displacement of the first screw rod; the second shoulder protrudes outward along the radial direction of the second screw rod, so that the second boss protruding toward the second screw rod can form a blocking effect on the second shoulder in the axial direction, thereby achieving the effect of limiting the axial displacement of the second screw rod.

[0090] Furthermore, combined with Figure 1-Figure 2 As shown, the wheel steering gear 200 further includes: a first sliding bearing 208 and a second sliding bearing 209, the first sliding bearing 208 and the second sliding bearing 209 are respectively arranged in the housing 203, the first screw rod is passed through the first sliding bearing 208, and the second screw rod is passed through the second sliding bearing 209. Among them, the sliding bearing has a simple structure and light weight, and is suitable for bearing high loads for a long time. Moreover, compared with the rolling bearing, the sliding bearing has the advantages of stable and reliable operation, no noise, high load-bearing capacity, large power transmission, and easy assembly and disassembly. Therefore, the structural form in which the first screw rod and the second screw rod are respectively passed through the first sliding bearing 208 and the second sliding bearing 209 can improve the reliability and service life of the wheel steering gear 200.

[0091] Specifically, combined Figure 1-Figure 2As shown, the first driving mechanism 201 includes a first driving member 2011 and a first transmission assembly 2012, the first driving member 2011 is installed on the shell 203, and the first transmission assembly 2012 is respectively connected to the first driving member 2011 and the first screw sleeve 204; the second driving mechanism 202 includes a second driving member 2021 and a second transmission assembly 2022, the second driving member 2021 is installed on the shell 203, and the second transmission assembly 2022 is respectively connected to the second driving member 2021 and the second screw sleeve 205.

[0092] Optionally, the first driving member 2011 can provide a power source. The first driving member 2011 first drives the first transmission component 2012 to rotate, and the first transmission component 2012 then transmits the power to the first screw sleeve 204. The first screw sleeve 204 then transmits the power to the first screw. At this time, the internal thread on the first screw sleeve 204 and the external thread on the first screw undergo relative rotational motion. Since the axial rotation of the first screw is restricted, the first screw can move along its own axial direction.

[0093] Alternatively, the second driving member 2021 can provide a power source. The second driving member 2021 first drives the second transmission component 2022 to rotate, and the second transmission component 2022 transmits the power to the second screw sleeve 205. The second screw sleeve 205 transmits the power to the second screw. At this time, the internal thread on the second screw sleeve 205 and the external thread on the second screw undergo relative rotational motion. Since the circumferential rotation of the second screw is restricted, the second screw can move along its own axial direction.

[0094] Furthermore, combined with Figure 1-Figure 2 As shown, the first transmission assembly 2012 includes a first transmission wheel 20121 and a second transmission wheel 20122, the first transmission wheel 20121 is connected to the first driving member 2011, the second transmission wheel 20122 is matched with the first transmission wheel 20121 for transmission, and the second transmission wheel 20122 is connected to the first screw sleeve 204; the second transmission assembly 2022 includes a third transmission wheel 20221 and a fourth transmission wheel 20222, the third transmission wheel 20221 is connected to the second driving member 2021, the fourth transmission wheel 20222 is matched with the third transmission wheel 20221 for transmission, and the fourth transmission wheel 20222 is connected to the second screw sleeve 205.

[0095] Optionally, the first driving member 2011 transmits power to the first transmission wheel 20121, the first transmission wheel 20121 transmits power to the second transmission wheel 20122, and the second transmission wheel 20122 drives the first screw sleeve 204 to rotate, so that the power on the first driving member 2011 can be gradually transmitted to the first screw sleeve 204, thereby ultimately achieving a control effect on the axial movement of the first screw.

[0096] Alternatively, the second driving member 2021 transmits power to the third transmission wheel 20221, and the third transmission wheel 20221 transmits power to the fourth transmission wheel 20222, and the fourth transmission wheel 20222 drives the second screw sleeve 205 to rotate, so that the power on the second driving member 2021 can be gradually transmitted to the second screw sleeve 205, thereby ultimately achieving a control effect on the axial movement of the second screw.

[0097] Specifically, combined Figure 1-Figure 2 As shown, the second transmission wheel 20122 is sleeved on the first screw sleeve 204, and the second transmission wheel 20122 and the first screw sleeve 204 are interference fit; and / or the fourth transmission wheel 20222 is sleeved on the second screw sleeve 205, and the fourth transmission wheel 20222 and the second screw sleeve 205 are interference fit. Among them, the connection mode of the two parts using interference fit can enhance the connection firmness and tightness of each other, and can also make the extrusion force between the two parts evenly distributed, which can reduce mutual looseness, thereby improving the running stability of the parts; and the interference fit can reduce the risk of part breakage and cracking by improving the ability to bear loads, effectively reduce the probability of damage caused by connection failure, thereby extending the service life of the parts. In addition, the second transmission wheel 20122 is sleeved on the first screw sleeve 204, which is also convenient for the second transmission wheel 20122 to transmit power to the first screw sleeve 204.

[0098] Furthermore, combined with Figure 1-Figure 2 As shown, the first transmission component 2012 also includes a first transmission belt 20123, which is respectively matched with the first transmission wheel 20121 and the second transmission wheel 20122; and / or the second transmission component 2022 also includes a second transmission belt 20223, which is respectively matched with the third transmission wheel 20221 and the fourth transmission wheel 20222.

[0099] It can be understood that the first transmission belt 20123 and the second transmission belt 20223, as transmission media, can respectively transmit the power on the first transmission wheel 20121 and the third transmission wheel 20221 to the second transmission wheel 20122 and the fourth transmission wheel 20222, so as to smoothly achieve the power transmission effect. The transmission belt has good elasticity, which can buffer and absorb vibration, so that the transmission process is smooth and noiseless; when the transmission belt is overloaded, it will slip on the pulley, and it can also protect other components and avoid damage caused by overload; and the transmission belt also has the advantages of simple structure, low cost and convenient maintenance and replacement. The arrangement of the transmission belt can effectively improve the practicality, safety and economy of the wheel steering device 200.

[0100] Specifically, combined Figure 1-Figure 2As shown, the wheel steering gear 200 further includes a first ball bearing 210 and a second ball bearing 211, which are respectively arranged in the housing 203, the first screw sleeve 204 is inserted through the first ball bearing 210, and the second screw sleeve 205 is inserted through the second ball bearing 211. Compared with the sliding bearing, the ball bearing can bear radial and axial loads, and smoothly transmit the force to other components to ensure the normal operation of the machine; the ball bearing can also reduce friction resistance, and the rolling friction is formed by the rolling rotation of the steel ball in the ballway, thereby reducing the friction between the ball bearing and the outside contact part and reducing energy loss.

[0101] For example, the first screw sleeve 204 is inserted into the first ball bearing 210 , which can support the first screw sleeve 204 , ensure the rotation accuracy of the first screw sleeve 204 during rotation, and transfer loads and reduce shock and vibration, thereby improving the operating stability of the first screw sleeve 204 .

[0102] Furthermore, combined with Figure 1-Figure 2 As shown, the wheel steering gear 200 also includes a first locking nut 212 and a second locking nut 213. The first locking nut 212 is arranged on the first screw sleeve 204, and the first locking nut 212 is located on the side of the first ball bearing 210 away from the second ball bearing 211. The second locking nut 213 is arranged on the second screw sleeve 205, and the second locking nut 213 is located on the side of the second screw sleeve 205 away from the first ball bearing 210.

[0103] The first locking nut 212 and the second locking nut 213 can prevent loosening and maintain the tightening force. For example, the first locking nut 212 is arranged on the side of the first ball bearing 210 away from the second ball bearing 211. Since the second ball bearing 211 vibrates frequently and is subjected to more external force impact, the bolts here are easily loosened. At this time, the use of the first locking nut 212 can prevent the bolts from loosening to a certain extent and maintain a stable tightening state.

[0104] Specifically, combined Figure 1-Figure 2 As shown, the wheel steering gear 200 also includes a first locking screw 214 and a second locking screw 215. The first locking screw 214 is arranged on the housing 203, and the first locking screw 214 is located on the side of the first ball bearing 210 adjacent to the second ball bearing 211. The second locking screw 215 is arranged on the housing 203, and the second locking screw 215 is located on the side of the second ball bearing 211 adjacent to the first ball bearing 210.

[0105] The first locking screw plug 214 and the second locking screw plug 215 can provide a greater initial pre-tightening force during tightening, thereby making it more difficult for the bolt to loosen or disintegrate. For example, the first locking screw plug 214 is located on the side of the first ball bearing 210 adjacent to the second ball bearing 211, so that it can cooperate with the first locking nut 212 to have a tightening and anti-loosening effect on both axial sides of the first ball bearing 210, thereby effectively improving the working stability of the first ball bearing 210.

[0106] Furthermore, combined with Figure 1-Figure 2 As shown, the wheel steering gear 200 also includes a first swing arm connecting member 216 and a second swing arm connecting member 217. The first swing arm connecting member 216 is used to connect to the first swing arm of the first wheel and is connected to the end of the first transmission rod 1 away from the second transmission rod 2. The second swing arm connecting member 217 is used to connect to the second swing arm of the second wheel and is connected to the end of the second transmission rod 2 away from the first transmission rod 1.

[0107] Among them, the first swing arm connecting member 216 is connected between the first screw rod and the first swing arm along the axial direction, which can play the effect of indirectly connecting the first screw rod and the first swing arm, so as to facilitate the first wheel to be driven to steer through the axial movement of the first screw rod; the second swing arm connecting member 217 is connected between the second screw rod and the second swing arm along the axial direction, which can play the effect of indirectly connecting the second screw rod and the second swing arm, so as to facilitate the second wheel to be driven to steer through the axial movement of the second screw rod, thereby improving the systematicity and reasonable layout of the wheel steering gear 200.

[0108] The vehicle according to the third aspect of the present invention comprises a first wheel, a second wheel and the wheel steering gear 200 of the above embodiment, so that the vehicle having the wheel steering gear 200 can improve its own lightweight effect and structural compactness.

[0109] In the description of the present invention, 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", "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 invention and simplifying the description, rather than indicating or implying 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 limiting the present invention.

[0110] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0111] 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 invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0112] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A transmission rod assembly of a wheel steering gear, characterized in that: include: a first transmission rod, wherein the first transmission rod drives the first wheel to turn by moving itself; a second transmission rod, wherein the second transmission rod drives the second wheel to turn by moving itself; Wherein, the first transmission rod is provided with an avoidance space, and the second transmission rod is provided with a matching portion, and the matching portion can extend into the avoidance space.

2. The transmission rod assembly of the wheel steering gear according to claim 1, characterized in that: After the matching portion extends into the avoidance space, the matching portion is spaced apart from the inner wall of the avoidance space.

3. The transmission rod assembly of the wheel steering gear according to claim 1, characterized in that: An end surface of the first transmission rod adjacent to one end of the second transmission rod is provided with an avoidance hole, and the avoidance hole forms the avoidance space; The matching portion is formed at an end of the second transmission rod adjacent to the first transmission rod.

4. The transmission rod assembly of the wheel steering gear according to claim 3, characterized in that: The cross section of the avoidance hole in a direction perpendicular to the axial direction of the first transmission rod is circular, and the cross section of the matching portion in a direction perpendicular to the axial direction of the second transmission rod is circular matching the cross-sectional shape of the avoidance hole.

5. The transmission rod assembly of the wheel steering gear according to claim 3, characterized in that: The first transmission rod comprises a first rod segment and a second rod segment, the avoidance hole is formed in the first rod segment, the second rod segment is connected to an end of the first rod segment away from the second transmission rod, and the cross-sectional area of ​​the second rod segment is greater than the cross-sectional area of ​​the first rod segment; The second transmission rod includes a third rod segment and a fourth rod segment, the matching portion is formed on the third rod segment, the fourth rod segment is connected to an end of the third rod segment away from the first transmission rod, and the cross-sectional area of ​​the third rod segment is smaller than the cross-sectional area of ​​the fourth rod segment.

6. The transmission rod assembly of the wheel steering gear according to any one of claims 1 to 5, characterized in that: The central axis of the first transmission rod coincides with the central axis of the second transmission rod. The first transmission rod drives the first wheel to steer by moving along its own central axis, and the second transmission rod drives the second wheel to steer by moving along its own central axis.

7. A wheel steering gear, characterized in that: include: The transmission rod assembly of the wheel steering gear according to any one of claims 1 to 6; a first driving mechanism, the first driving mechanism being connected to the first transmission rod to drive the first transmission rod to move; A second driving mechanism is connected to the second transmission rod to drive the second transmission rod to move.

8. The wheel steering gear according to claim 7, characterized in that: Also includes: a first screw sleeve, wherein the first transmission rod is a first screw and is threadedly matched with the first screw sleeve, the first driving mechanism is in transmission connection with the first screw sleeve, and the first driving mechanism drives the first screw sleeve to rotate to drive the first transmission rod to move; The second screw sleeve, the second transmission rod is a second screw and is threadedly matched with the second screw sleeve, the second driving mechanism is transmission-connected with the second screw sleeve, and the second driving mechanism drives the second screw sleeve to rotate to drive the second transmission rod to move.

9. The wheel steering gear according to claim 8, characterized in that: An end of the second screw rod sleeve adjacent to the first screw rod is provided with an accommodation space, and an end of the first transmission rod adjacent to the second transmission rod can extend into the accommodation space.

10. The wheel steering gear according to claim 9, characterized in that: After one end of the first transmission rod adjacent to the second transmission rod extends into the accommodation space, the first transmission rod is spaced apart from the inner wall of the accommodation space.

11. The wheel steering gear according to claim 9, characterized in that: An end surface of the second screw sleeve adjacent to one end of the first transmission rod is provided with a receiving hole, and the receiving hole forms the receiving space.

12. The wheel steering gear according to claim 11, characterized in that: The cross section of the accommodating hole in a direction perpendicular to the axial direction of the first screw sleeve is circular, and the outer contour of the cross section of one end of the first screw adjacent to the second screw in a direction perpendicular to the axial direction of the first screw is circular and matches the cross-sectional shape of the accommodating hole.

13. The wheel steering gear according to claim 7, characterized in that: Also includes: A housing, wherein the first transmission rod and the second transmission rod are installed in the housing.

14. The wheel steering gear according to claim 13, characterized in that: The housing comprises: a first housing, wherein the first housing forms the first installation space, and the first transmission rod is disposed in the first installation space; The second shell is connected to the first shell, the second shell forms the second installation space, the first installation space is connected to the second installation space, and the second transmission rod is arranged in the second installation space.

15. The wheel steering gear according to claim 14, characterized in that: The housing further comprises: A sealing member, wherein a first sealing surface is disposed on a side of the first shell facing the second shell, and a second sealing surface is disposed on a side of the second shell facing the first shell, and the sealing member is respectively sealed with the first sealing surface and the second sealing surface.

16. The wheel steering gear according to claim 15, characterized in that: The first sealing surface, the second sealing surface and the sealing element are configured in mutually matching annular shapes, and at least one of the first sealing surface and the second sealing surface is provided with a sealing groove for accommodating the sealing element.

17. The wheel steering gear according to claim 13, characterized in that: Also includes: a first stopper, the first stopper being mounted on one of the housing and the first screw rod, the first stopper being movably matched with the other of the housing and the first screw rod along the axial direction of the first screw rod; A second limiting member is installed on one of the housing and the second screw rod, and the second limiting member is movably matched with the other of the housing and the second screw rod along the axial direction of the second screw rod.

18. The wheel steering gear according to claim 17, characterized in that: The housing is provided with a first slide groove and a second slide groove, the first slide groove extends along the axial direction of the first screw rod, the second slide groove extends along the axial direction of the second screw rod, the first limit member is installed on the first screw rod and cooperates with the first slide groove, and the second limit member is installed on the second screw rod and cooperates with the second slide groove.

19. The wheel steering gear according to claim 8, characterized in that: The first driving mechanism comprises a first driving member and a first transmission assembly, and the first transmission assembly is respectively connected to the first driving member and the first screw sleeve in a transmission manner; The second driving mechanism includes a second driving member and a second transmission assembly, and the second transmission assembly is respectively connected to the second driving member and the second screw sleeve.

20. The wheel steering gear according to claim 19, characterized in that: The first transmission assembly includes a first transmission wheel and a second transmission wheel, the first transmission wheel is connected to the first driving member, the second transmission wheel is in transmission cooperation with the first transmission wheel, and the second transmission wheel is connected to the first screw sleeve; The second transmission assembly includes a third transmission wheel and a fourth transmission wheel, the third transmission wheel is connected to the second driving member, the fourth transmission wheel is in transmission cooperation with the third transmission wheel, and the fourth transmission wheel is connected to the second screw sleeve.

21. The wheel steering gear according to claim 20, characterized in that: The second transmission wheel is sleeved on the first screw sleeve and has an interference fit with the first screw sleeve; and / or The fourth transmission wheel is sleeved on the second screw sleeve and has an interference fit with the second screw sleeve.

22. The wheel steering gear according to claim 20, characterized in that: The first transmission assembly further includes a first transmission belt, and the first transmission belt is respectively in transmission cooperation with the first transmission wheel and the second transmission wheel; and / or The second transmission assembly also includes a second transmission belt, and the second transmission belt is respectively in transmission cooperation with the third transmission wheel and the fourth transmission wheel.

23. A vehicle, characterized in that: include: a first wheel and a second wheel; The wheel steering gear according to any one of claims 7 to 22.

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