Transmission assembly for steering gear, steering gear and vehicle

Abstract

The utility model belongs to the technical field of vehicles, and discloses a transmission assembly for a steering gear, the steering gear and a vehicle. The transmission assembly comprises a driving rod and a shell, a plurality of first limiting pieces are axially arranged on the outer surface of the driving rod, and the first limiting pieces are arranged in the axial direction of the driving rod at intervals; and a plurality of second limiting pieces are axially arranged on the inner surface of the shell, and the first limiting pieces and the second limiting pieces are connected in a concave-convex fit mode so as to limit the rotating motion of the driving rod. The transmission assembly is simple in structure and easy to operate and implement, the rotating motion of the driving rod is limited through concave-convex matched connection of the first limiting pieces and the corresponding second limiting pieces, the circumferential bearing capacity of the steering gear is high, and the self-locking performance of the driving rod is improved.

Description

Technical Field

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

[0002] The steering gear is generally used to drive the rear wheel steering of the vehicle, and then cooperates with the front wheel steering to jointly control the vehicle's motion trajectory and assist in improving the vehicle's stability. Among them, the transmission assembly of the steering gear generally includes a housing located at the rear wheel of the vehicle and a drive rod located in the housing. The existing drive rod can move axially in a straight line in the housing. During the axial straight line movement, there is inevitably circumferential rotation movement, which affects the self-locking performance of the drive rod. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a transmission assembly for a steering gear, a steering gear and a vehicle.

[0004] In a first aspect of the present invention, a transmission assembly for a steering gear is provided, comprising:

[0005] A driving rod, wherein a plurality of first stoppers are axially arranged on the outer surface of the driving rod, and the plurality of first stoppers are spaced apart along the axial direction of the driving rod;

[0006] The housing has a plurality of second limiting members axially disposed on the inner surface of the housing, and the first limiting members are connected with the second limiting members in a concave-convex matching manner to limit the rotational movement of the driving rod.

[0007] The transmission assembly for the steering gear provided by the utility model has a simple structure and is easy to operate and implement. The circumferential rotational movement of the driving rod is limited by the concave-convex matching connection of multiple first limiting members and corresponding multiple second limiting members, so that the circumferential bearing capacity of the steering gear is strong and the self-locking performance of the driving rod is improved.

[0008] In addition, the transmission assembly for a steering gear of the utility model may also have the following additional technical features:

[0009] Preferably, the first position-limiting member comprises a plurality of first protrusions, and the plurality of first protrusions are circumferentially spaced apart and arranged on the outer surface of the driving rod.

[0010] Preferably, a first groove is formed between two adjacent first protrusions.

[0011] Preferably, the transmission assembly further comprises a limiting portion, which is disposed on the driving rod and is used to limit the travel of the driving rod in the housing.

[0012] Preferably, the limiting portion is located at a first end of the first limiting member, and the first end is suitable for being close to a steering column of a steering gear.

[0013] Preferably, the plurality of first limiting members include at least a first sub-limiting member and a second sub-limiting member, and the radial dimensions of the cylinder where the outer surfaces of the first sub-limiting member and the second sub-limiting member are located are different.

[0014] Preferably, the first sub-limiting member is disposed at the first section of the driving rod, and the second sub-limiting member is disposed at the second section of the driving rod, and the radial dimensions of the first section and the second section are different.

[0015] Preferably, the first section is adapted to be closer to a steering column of the steering gear than the second section, and a radial dimension of the first section is greater than a radial dimension of the second section.

[0016] Preferably, the second limiting member includes a plurality of second grooves, and the plurality of second grooves are circumferentially spaced apart from each other on the inner surface of the shell.

[0017] A second aspect of the present invention provides a steering gear, comprising a transmission assembly and a steering column for a steering gear as described in any embodiment of the present application; the transmission assembly is in transmission connection with the steering column.

[0018] According to a third aspect of the utility model, a vehicle is provided, wherein the vehicle comprises the transmission assembly for the steering gear described in any embodiment of the present application, or comprises the steering gear described in any embodiment of the present application.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0021] Figure 1 An exemplary structural diagram of a steering device provided in an embodiment of the present application;

[0022] Figure 2 A cross-sectional view of a steering gear provided in an embodiment of the present application;

[0023] Figure 3 An exploded view of a steering gear provided in an embodiment of the present application;

[0024] Figure 4 A schematic diagram of the structure of the driving rod provided in an embodiment of the present application.

[0025] In the above figure: 100 transmission assembly; 110 driving rod; 111 first mounting portion; 112 second mounting portion; 120 first stopper; 121 first protrusion; 122 first groove; 130 stopper; 140 housing; 141 second groove;

[0026] 200 steering gear; 210 steering column; 220 yoke; 230 bolts. DETAILED DESCRIPTION

[0027] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items.

[0030] Unless the context requires otherwise, throughout the specification and claims, the term "comprising" is to be construed in an open, inclusive sense, ie, meaning "including, but not limited to."

[0031] In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" are intended to indicate that a specific feature, structure, material or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0032] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0033] The steering gear is used to drive the rear wheel steering of the vehicle, and then cooperate with the front wheel steering to jointly control the vehicle's motion trajectory and assist in improving the vehicle's stability. Among them, the steering gear's rotating assembly 100 generally includes a shell located at the rear wheel of the vehicle and a driving rod located in the shell. The driving rod can move axially and linearly in the shell, and circumferential rotational motion is inevitable during the axial linear motion. An axial steel ball raceway is currently arranged on the outer circle of the bare rod part of the driving rod, and a ball sleeve is arranged in the shell. The outer sleeve of the ball sleeve is fixedly connected to the shell, and the steel ball in the ball sleeve cooperates with the axial steel ball raceway of the driving rod to prevent the driving rod from circumferential rotational motion. Although the rotating assembly can prevent the circumferential rotational motion of the driving rod to a certain extent, the load it can withstand is relatively low, and the gap between the driving rod and the shell is relatively large, which affects its self-locking performance.

[0034] The first aspect of the utility model is as follows Figures 1 to 3 As shown, a rotating assembly 100 for a steering gear is provided, comprising:

[0035] A driving rod 110, wherein a plurality of first stoppers 120 are axially arranged on the outer surface of the driving rod 110, and the plurality of first stoppers 120 are spaced apart along the axial direction of the driving rod 110;

[0036] The housing 140 has a plurality of second limiting members axially disposed on the inner surface of the housing 140 . The first limiting member 120 is connected to the second limiting member in a concave-convex matching manner to limit the rotational movement of the driving rod 110 .

[0037] Specifically, the shell 140 has through holes at both ends, and the drive rod 110 moves axially and linearly in the shell 140 through the through holes, wherein the drive rod 110 may be a lead screw, one end of which is connected to a driving part such as a driving motor through a lead screw nut, and the torque of the driving part is transmitted to the lead screw nut, and the lead screw nut converts the rotational motion into the axial linear motion of the drive rod 110. During the process of the driving part driving the drive rod 110 to move axially and linearly, the drive rod 110 inevitably has circumferential rotational motion. In order to limit the circumferential rotational motion of the drive rod 110, in this example, one end of the drive rod 110 has an external thread that is threadedly engaged with the internal thread of the lead screw nut, and the other end of the drive rod 110 has a smooth rod portion, and a plurality of first stoppers 120 are arranged on the outer surface of the smooth rod portion at intervals along the axial direction of the drive rod 110, and the first stoppers 120 are fixedly connected to the drive rod 110, such as by welding. The inner surface of the shell 140 has a plurality of second limit members along the axial direction of the driving rod 110, and the number of the second limit members is the same as the number of the first limit members 120. When the driving rod 110 is assembled into the shell 140, the circumferential rotational movement of the driving rod 110 in the shell 140 is limited by the concave-convex matching connection between the plurality of first limit members 120 and the corresponding plurality of second limit members, so as to make the driving rod 110 only move in a straight line along its own axis under the action of the driving part.

[0038] The rotating assembly 100 for the steering gear provided by the utility model has a simple structure, low cost, and is easy to operate and implement. The circumferential rotational movement of the drive rod 110 is limited by the concave-convex matching connection of multiple first limit members 120 and corresponding multiple second limit members, thereby increasing the axial and circumferential bearing capacity of the steering gear 200 and improving the self-locking performance of the drive rod 110.

[0039] It should be noted that technicians in this field can set the number and distribution spacing of the first limit members 120 according to actual needs. For example, if the number of the first limit members 120 is 2, 3, 4, etc., multiple first limit members 120 can be distributed on the outer surface of the driving rod 110 with equal or unequal spacing along the axial direction, and it is preferred to adopt an equal spacing distribution.

[0040] In some embodiments, Figures 1 to 4 As shown, the first position-limiting member 120 includes a plurality of first protrusions 121 , and the plurality of first protrusions 121 are circumferentially spaced apart and arranged on the outer surface of the driving rod 110 .

[0041] Specifically, a plurality of first protrusions 121 are arranged at equal or non-equal intervals in the circumferential direction on the outer surface of the driving rod 110, and the plurality of first protrusions 121 can increase the circumferential contact area between the driving rod 110 and the first protrusions 121, so that the circumferential bearing capacity of the steering gear 200 is further improved, thereby improving the self-locking performance of the driving rod 110. Preferably, a plurality of first protrusions 121 are arranged at equal intervals in the circumferential direction on the surface of the first stopper 120, so that the force on the driving rod 110 at various circumferential positions is more uniform.

[0042] Among them, those skilled in the art can set the number of the first protrusions 121 included in the first stopper 120 based on the self-locking performance and cost of the steering gear 200, such as 2, 4, 6, 8, 10, 12, etc. The first protrusion 121 can be a protruding rod, a protruding plate, etc. extending along the axial direction of the driving rod 110.

[0043] In some embodiments, Figure 4 As shown, a first groove 122 is formed between two adjacent first protrusions 121 .

[0044] Specifically, the first limiting member 120 includes a plurality of first protrusions 121 distributed at intervals in the circumferential direction, and a first groove 122 is formed between two adjacent first protrusions 121, that is, the first limiting member 120 includes a plurality of first protrusions 121 and a plurality of first grooves 122 that are staggered in the circumferential direction. Through the cooperation between the first protrusions 121 and the first grooves 122, the assembly of the driving rod 110 is facilitated, and the circumferential rotational movement of the driving rod 110 can be limited without affecting the axial linear movement of the driving rod 110.

[0045] It should be noted that when multiple first protrusions 121 are circumferentially evenly spaced on the outer surface of the driving rod 110, the multiple first protrusions 121 and the corresponding multiple first grooves 122 form a spline structure. The multiple spline structures distributed axially along the driving rod 110 limit the circumferential movement of the driving rod 110, thereby improving the self-locking performance of the driving rod 110.

[0046] In one embodiment, Figure 4 As shown, the first protrusion 121 of one first limiting member 120 and the first groove 122 of the other first limiting member 120 of at least two adjacent first limiting members 120 are correspondingly arranged along the axial direction of the driving rod 110 .

[0047] Specifically, the two first limit members 120 adjacent to each other along the axial direction of the driving rod 110 are respectively the first spline and the second spline, wherein the first spline and the second spline are both composed of a plurality of first protrusions 121 and a plurality of first grooves 122, the first protrusion 121 of the first spline and the first groove 122 of the second spline are distributed in a line along the axial direction of the driving rod 110, the first groove 122 of the first spline and the first protrusion 121 of the second spline are distributed in a line along the axial direction of the driving rod 110, and the first protrusion 121 and the first groove 122 are distributed in a line along the axial direction of the driving rod 110, and the first protrusion 121 and the first groove 122 are axially staggeredly distributed on the surface of the driving rod 110, so that the steering gear 200 has a high load-bearing capacity, good centering and guiding properties, and the tooth root of the first protrusion 121 is shallow, the stress concentration is small, and the force point is concentrated on the first groove 122.

[0048] In some embodiments, Figure 4 As shown, the rotating assembly 100 further includes a limiting portion 130 , which is disposed on the driving rod 110 and is used to limit the travel of the driving rod 110 in the housing 140 .

[0049] Specifically, during the axial linear motion of the driving rod 110 , since no limit piece is provided to limit the axial motion of the driving rod 110 , the driving rod 110 may extend too far outside the housing 140 , affecting the steering performance of the vehicle wheels and posing a safety hazard to the vehicle.

[0050] In this example, the position of the limit portion 130 can be set according to actual needs to limit the axial movement stroke of the driving rod 110, so as to prevent the driving rod 110 from extending out of the housing 140 for too long. For example, the limit portion 130 is arranged on the outer surface of the driving rod 110 away from the first limit member 120, and the limit portion 130 is arranged on the first limit member 120, preferably at the end of the first limit member 120 close to the driving part. By limiting the axial movement of the driving rod 110 by the limit portion 130, it is ensured that the mechanical stroke difference will not be generated during the movement of the steering gear 200, thereby avoiding damage and failure of the structure of the steering gear 200 itself. Among them, the limit portion 130 can be an annular baffle or a protrusion.

[0051] In some embodiments, Figure 4 As shown, the limiting portion 130 is located at the first end of the first limiting member 120 , and the first end is suitable for being close to the steering column 210 of the steering gear 200 .

[0052] Specifically, the steering gear 200 has a steering column 210, one end of the driving rod 110 passes through the steering column 210 and is connected to the driving part, the other end of the driving rod 110 is connected to the yoke 220, and a plurality of first stoppers 120 are arranged on the outer surface of the driving rod 110 near the yoke 220. The stopper 130 can be arranged on a first stopper 120 near the steering column 210, and the stopper 130 is preferably arranged at the first end of the first stopper 120, the first end being the end of the first stopper 120 near the steering column 210, that is, the stopper 130 is fixedly connected to the ends of the first groove 122 and the first protrusion 121, respectively, and is preferably integrally formed, which is convenient for processing and saves costs. Among them, the stopper 130 can cooperate with the end of the housing 140 to limit the maximum distance of the driving rod 110 extending out of the housing 140 to avoid the driving rod 110 from moving over the stroke, thereby ensuring the performance of the steering gear 200.

[0053] It should be noted that a blocking portion that cooperates with the limiting portion 130 is provided on one side of the shell 140 close to the vehicle yoke 220. The blocking portion may be an annular baffle or a protrusion. Through the cooperation between the limiting portion 130 and the blocking portion, the distance that the drive rod 110 extends out of the shell 140 can be limited at the end of the shell 140 to prevent the drive rod 110 from axially moving beyond the stroke.

[0054] For example, Figure 4As shown, the limiting part 130 is a first annular baffle, which is arranged on the side of the first limiting member 120 away from the yoke 220, or on the surface of the driving rod 110 away from the first limiting member 120; the blocking part is a second annular baffle, which is arranged on the end surface of the housing 140 near the end of the yoke 220, and the diameter of the first annular baffle is greater than the diameter of the second annular baffle, which can limit the driving rod 110 from continuing to move outward at the end of the housing 140. Alternatively, the limiting part 130 is a convex block, which is one or more, and the plurality of convex blocks are circumferentially arranged on the side of the first limiting member 120 away from the yoke 220, or on the surface of the driving rod 110 away from the first limiting member 120; the blocking part is a stopper, which is one or more, and the plurality of stoppers are circumferentially arranged on the inner surface of the end of the housing 140, and the driving rod 110 is limited from continuing to move outward at the end of the housing 140 through the stopper cooperation of the convex block and the stopper.

[0055] It is understandable that the diameter of the end of the shell 140 close to the yoke 220 is smaller than the diameter of the yoke 220. When the drive rod 110 retracts along its axial straight line movement toward the shell 140, the end of the shell 140 cooperates with the stopper of the yoke 220 to limit the axial movement of the drive rod 110, thereby ensuring that the overall structure does not produce mechanical stroke deviations during movement, causing damage to and failure of the machine itself.

[0056] In some embodiments, Figure 4 As shown, the plurality of first limiting members 120 at least include a first sub-limiting member and a second sub-limiting member, and the radial dimensions of the cylinder where the outer surfaces of the first sub-limiting member and the second sub-limiting member are located are different.

[0057] Specifically, the driving rod 110 provided in the embodiment of the present application can move axially and linearly inside the housing 140. The direction in which the driving rod 110 is assembled into the housing 140 is the assembly direction of the driving rod 110, and the assembly direction is parallel to the axial direction of the driving rod 110. Then, the radial dimensions of the plurality of first stoppers 120 along the assembly direction of the driving rod 110 are gradually reduced, so that it is convenient for the driving rod 110 to be assembled into the housing 140. That is, in the process of assembling the driving rod 110 into the housing 140, the driving rod 110 with the first stopper 120 of small diameter is assembled into the housing 140 first, and then the driving rod 110 with the first stopper 120 of large diameter is assembled into the housing 140.

[0058] For example, Figure 1As shown, two of the multiple first limit members 120 are respectively the first sub-limit member and the second sub-limit member, wherein the radial dimension of the cylinder where the outer surface of the first sub-limit member is located is different from the radial dimension of the cylinder where the outer surface of the second sub-limit member is located, and the radial dimension of the cylinder where the outer surfaces of the first sub-limit member and the second sub-limit member are located decreases successively along the assembly direction of the drive rod 110, which facilitates the assembly of the drive rod 110 and the shell 140.

[0059] In some embodiments, Figure 1 As shown, the first sub-limiting member is disposed at the first section of the driving rod 110 , and the second sub-limiting member is disposed at the second section of the driving rod 110 , and the radial dimensions of the first section and the second section are different.

[0060] Specifically, the driving rod 110 has an integrally formed first section and a second section on the side away from the steering column 210, and the radial dimensions of the first section and the second section are different. The first sub-limiting member and the second sub-limiting member are fixedly arranged on the first section and the second section respectively, and the radial dimensions of the cylinders where the outer surfaces of the first sub-limiting member and the second sub-limiting member are located are different to meet the assembly requirements of the driving rod 110.

[0061] In some embodiments, Figure 1 As shown, the first section is adapted to be closer to the steering column 210 of the steering gear 200 than the second section, and the radial dimension of the first section is greater than the radial dimension of the second section.

[0062] Specifically, the second section, the first section and the steering column 210 are arranged in sequence, so that the first section is closer to the steering column 210, and the second section is arranged away from the steering column 210 relative to the first section. The radial dimension of the first section is greater than the radial dimension of the second section. Then, the radial dimension of the cylinder where the outer surface of the first sub-limiting member is located is greater than the radial dimension of the cylinder where the outer surface of the second sub-limiting member is located. In the process of assembling the drive rod 110 into the shell 140, the drive rod 110 with the second sub-limiting member is first assembled into the shell 140, and the drive rod 110 with the first sub-limiting member is assembled into the shell 140 later, so as to facilitate the plug-in assembly of the drive rod 110 and the shell 140.

[0063] In some embodiments, Figures 1 to 4 As shown, a first mounting portion 111 is provided at an end of the driving rod 110 close to the first stopper 120;

[0064] or / and,

[0065] A second mounting portion 112 is disposed at an end of the driving rod 110 away from the first limiting member 120 .

[0066] Specifically, one end of the driving rod 110 is connected to the yoke 220 of the vehicle through the first mounting portion 111, and the other end is connected to the lead screw nut of the driving portion through the second mounting portion 112. The driving portion drives the lead screw nut to rotate, and the lead screw nut converts the rotational motion into the axial motion of the lead screw. The axial motion of the lead screw drives the yoke 220 to move, so as to achieve the steering effect of the wheel. The wheel described in any embodiment of the present application can be the front wheel or the rear wheel of the vehicle.

[0067] In some embodiments, Figures 1 to 4 As shown, the first mounting portion 111 includes a screw hole or a pin hole; the second mounting portion 112 includes a trapezoidal external thread.

[0068] Specifically, a screw hole or a pin hole may be provided at the end of the driving rod 110 away from the driving part, and the driven parts such as the yoke 220 can be detachably connected to the driving rod 110 by the cooperation of the bolt 230 and the screw hole, or the driving rod 110 can be detachably connected to the driven parts by the cooperation of the pin and the pin hole, so as to facilitate the installation and maintenance of the driving rod 110. When the driving part is connected to the yoke 220, the steering control of the vehicle wheels can be realized.

[0069] The outer surface of one end of the driving rod 110 close to the driving part has a trapezoidal external thread, which can be a trapezoidal thread matching the internal thread of the lead screw nut. When the driving part drives the lead screw nut to rotate, the trapezoidal external thread can prevent the driving rod 110 from rotating in the circumferential direction when the lead screw nut drives the driving rod 110 to move, so that the driving rod 110 can only move in a straight line along its axial direction.

[0070] In this example, the trapezoidal thread itself has good self-locking performance, which can prevent the drive rod 110 from being subjected to load and causing circumferential movement, ensuring high precision and stability, improving the precise control of rear wheel steering, and increasing driving precision and stability. The multiple first limiters 120 arranged circumferentially on the drive rod 110 further effectively limit the circumferential rotation of the drive rod 110, prevent it from circumferential rotation, limit it to axial movement, improve the self-locking performance of the drive rod 110, and thus improve driving safety, with high reliability and strong applicability, simple structure and convenient operation.

[0071] In some embodiments, the second limiting member includes a plurality of second grooves 141 , and the plurality of second grooves 141 are circumferentially spaced apart from each other on the inner surface of the housing 140 .

[0072] Specifically, the plurality of second grooves 141 are distributed on the inner surface of the housing 140 at equal or non-equal intervals in the circumferential direction, wherein the plurality of first protrusions 121 on the outer surface of the driving rod 110 can be correspondingly assembled into the second grooves 141 on the inner surface of the housing 140, so as to realize the concave-convex matching connection between the driving rod 110 and the housing 140. When the plurality of first protrusions 121 are arranged on the outer surface of the driving rod 110 at equal intervals in the circumferential direction, the corresponding plurality of second grooves 141 are arranged on the inner surface of the housing 140 at equal intervals in the circumferential direction.

[0073] It should be noted that part of the second grooves 141 and part of the second grooves 141 form a plurality of second protrusions, and the plurality of second grooves 141 and the plurality of second protrusions are arranged alternately. When the plurality of second grooves 141 are evenly distributed on the inner surface of the housing 140 in the circumferential direction, a spline structure is formed between the plurality of second grooves 141 and the corresponding plurality of second protrusions, and the first protrusion 121 can be assembled into the second groove 141, and the second protrusion can be assembled into the first groove 122, thereby further improving the self-locking performance of the driving rod 110.

[0074] It can be understood that when the radial dimensions of multiple first limit members 120 are different, the radial dimensions of the corresponding multiple second limit members are also different, and the radial dimensions of the multiple second limit members are adapted to the radial dimensions of the corresponding multiple first limit members 120, and the radial dimensions of the multiple first limit members 120 along the assembly direction of the drive rod 110 into the shell 140 are reduced successively to facilitate the assembly of the drive rod 110 in the shell 140.

[0075] According to a second aspect of the present invention, a steering gear 200 is provided. The steering gear 200 includes a rotating assembly 100 for a steering gear and a steering column 210 as described in any embodiment of the present application. The rotating assembly 100 is in transmission connection with the steering column 210 .

[0076] Specifically, Figure 1 Hezhi Figure 3 As shown, the vehicle has a housing 140 at the wheel, and the housing 140 has through holes at both ends, and the driving rod 110 (such as a lead screw) is assembled into the through hole, and a steering column 210 is arranged at one end of the driving rod 110, and the driving rod 110 is connected to the steering column 210 by transmission, and the driving rod 110 passes through the steering column 210 and is connected to the driving part through a lead screw nut, and the other end of the driving rod 110 is provided with a screw hole along its axial direction, and a bolt 230 is assembled in the screw hole, and the yoke 220 is detachably connected to the driving rod 110 through the cooperation of the bolt 230 and the screw hole, and the yoke 220 is connected to the wheel of the vehicle. Alternatively, a pin hole is arranged at the other end of the driving rod 110 along its axial direction, and a pin is assembled in the pin hole, and the yoke 220 is detachably connected to the driving rod 110 through the cooperation of the pin and the pin hole, and the yoke 220 is connected to the wheel of the vehicle.

[0077] Among them, a plurality of first stoppers 120 are arranged along the axial direction of the outer surface of the driving rod 110 near the side of the yoke 220, and a plurality of second stoppers are arranged along the axial direction of the driving rod 110 inside the housing 140. The concave-convex matching connection between the driving rod 110 and the housing 140 is realized by the plurality of first stoppers 120 and the plurality of second stoppers, so as to limit the circumferential rotational movement of the driving rod 110, so that the driving rod 110 can only move linearly along its axial direction under the drive of the driving part. Since the plurality of first stoppers 120 and the plurality of second stoppers are distributed between the driving rod 110 and the housing 140 along the axial direction of the driving rod 110, the circumferential contact area between the driving rod 110 and the housing 140 is increased, the circumferential bearing capacity is good, the circumferential rotational movement of the driving rod 110 is reduced, the self-locking performance of the driving rod 110 is increased, and the steering safety of the vehicle is improved.

[0078] It should be noted that a plurality of first limit members 120 are axially arranged on the side of the drive rod 110 close to the yoke 220, so as to limit the circumferential movement of the drive rod 110 on the side close to the yoke 220, so as to limit the circumferential rotational movement of the drive rod 110, and do not affect the axial linear movement of the drive rod 110 in the through hole of the shell 140, so as to achieve the purpose of steering the vehicle wheels.

[0079] The steering gear 200 provided by the utility model is simple and easy to operate and implement. The circumferential rotational movement of the driving rod 110 is limited by the concave-convex cooperation of multiple first limiting members 120 and corresponding multiple second limiting members, thereby increasing the circumferential contact area between the driving rod 110 and the housing 140, improving the circumferential bearing capacity, improving the self-locking performance of the driving rod 110, and increasing the driving safety of the vehicle.

[0080] In some embodiments, a bearing is disposed in the housing 140 , and the driving rod 110 passes through an inner side of the bearing. The bearing guides the axial linear motion of the driving rod 110 .

[0081] Specifically, the outer side of the bearing is fixedly connected to the inner side of the housing 140, such as by welding, and the driving rod 110 passes through the inner side of the bearing and is connected to the bearing with clearance fit. The arrangement of the bearing can reduce the friction between the driving rod 110 and the housing 140 and increase wear resistance.

[0082] It should be noted that the bearing can be arranged on the side of the housing 140 away from the yoke 220, or the second stopper on the side away from the yoke 220 among the plurality of second stoppers can be replaced with a bearing. In this example, some of the second stoppers are replaced with bearings, which facilitates the installation of the drive rod 110 in the housing 140, reduces the friction between the drive rod 110 and the housing 140, and increases the wear resistance.

[0083] A third aspect of the present invention provides a vehicle, wherein the vehicle comprises the steering gear 200 described in any embodiment of the present application.

[0084] The vehicle provided in the embodiment of the present application can be a pure electric vehicle or a hybrid electric vehicle. The vehicle includes the steering gear 200 described in any embodiment of the present application, and its specific technical features and technical effects are consistent with the rotating assembly 100 and the steering gear 200 provided in any embodiment of the present application, and the embodiments of the present application will not be repeated.

[0085] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. A transmission assembly (100) for a steering gear, characterized in that: include: A driving rod (110), wherein a plurality of first position-limiting members (120) are axially arranged on an outer surface of the driving rod (110), and the plurality of first position-limiting members (120) are arranged at intervals along the axial direction of the driving rod (110); A shell (140), wherein a plurality of second limiting members are axially arranged on the inner surface of the shell (140), and the first limiting member (120) is connected to the second limiting member in a concave-convex matching manner to limit the rotational movement of the driving rod (110).

2. The transmission assembly (100) for a steering gear according to claim 1, characterized in that: The first position-limiting member (120) comprises a plurality of first protrusions (121), and the plurality of first protrusions (121) are arranged at circumferential intervals on the outer surface of the driving rod (110).

3. The transmission assembly (100) for a steering gear according to claim 2, characterized in that: A first groove (122) is formed between two adjacent first protrusions (121).

4. The transmission assembly (100) for a steering gear according to claim 1, characterized in that: The transmission assembly (100) further comprises a limiting portion (130), wherein the limiting portion (130) is arranged on the driving rod (110) and is used to limit the travel of the driving rod (110) in the housing (140).

5. The transmission assembly for a steering gear according to claim 4, characterized in that: The limiting portion (130) is located at a first end of the first limiting member (120), and the first end is suitable for being close to a steering column (210) of a steering gear (200).

6. The transmission assembly (100) for a steering gear according to any one of claims 1 to 5, characterized in that: The plurality of first limiting members (120) at least include a first sub-limiting member and a second sub-limiting member, and the radial dimensions of the cylinder where the outer surfaces of the first sub-limiting member and the second sub-limiting member are located are different.

7. The transmission assembly (100) for a steering gear according to claim 6, characterized in that: The first sub-limiting member is arranged at a first section of the driving rod (110), and the second sub-limiting member is arranged at a second section of the driving rod (110); the radial dimensions of the first section and the second section are different.

8. The transmission assembly (100) for a steering gear according to claim 7, characterized in that: The first section is adapted to be closer to a steering column (210) of the steering gear than the second section, and a radial dimension of the first section is greater than a radial dimension of the second section.

9. The transmission assembly for a steering gear according to any one of claims 1 to 5, characterized in that: The second limiting member comprises a plurality of second grooves (141), and the plurality of second grooves (141) are arranged at circumferential intervals on the inner surface of the housing (140).

10. A diverter (200), characterized in that: include: The transmission assembly (100) and steering column (210) for a steering gear according to any one of claims 1 to 9, wherein the transmission assembly (100) is transmission-connected to the steering column (210).

11. A vehicle, characterized in that: A transmission assembly (100) for a steering gear comprising any one of claims 1 to 9, or a steering gear (200) comprising claim 10.

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