Auxiliary support structure and steering gear

Abstract

The present application provides an auxiliary support structure, including an outer shell, a steering screw, and a support assembly, wherein the outer shell, the steering screw is disposed within the outer shell and is rotatably connected to the outer shell, the steering screw is provided with a steering nut, and the steering nut is threadedly connected to the steering screw, and the support assembly includes a support roller, the support roller is rotatably connected to the outer shell, the support roller is provided with a first conical surface, and the steering nut is provided with a first veneer, the first conical surface abuts against the first veneer, and is used to press the steering nut onto the steering screw. Through the support roller, on the one hand, the sliding friction between the steering nut and the outer shell is converted into rolling friction between the steering nut and the support roller, thereby improving the efficiency of the steering gear, reducing the possibility of wear, and thus reducing the possibility of leakage and failure of the steering gear; on the other hand, pressure is applied to the first veneer, so that when the first conical surface abuts against the first veneer, a limiting effect can be provided on the steering nut, reducing the possibility of the steering nut deviating from the center.

Description

Technical Field

[0001] The present application relates to the technical field of commercial vehicle steering gears, and in particular to an auxiliary support structure and a steering gear. Background Art

[0002] Most current commercial vehicles use recirculating ball steering gears. In recirculating ball steering gears, the steering nut is sleeved on the steering screw. The steering nut is provided with a rack that engages with the gear sector. When the steering screw, which is fixed to the steering wheel and steering column, rotates, the steering screw pushes the steering nut to move along the axis of the steering screw. The steering nut then drives the steering rocker arm to rock back and forth through the gear sector to achieve steering.

[0003] When the steering gear starts working, since the steering nut is in direct contact with the inner wall of the housing, it is inevitable that the steering nut will rub against the inner wall of the steering gear housing during operation. On the one hand, the friction force on the steering nut will reduce the transmission efficiency of the steering gear. On the other hand, the friction between the steering nut and the inner wall of the housing is also prone to wear, which can lead to internal leakage in the steering gear hydraulic system. In severe cases, it may even cause the entire steering gear to fail. Summary of the Invention

[0004] Based on this, it is necessary to provide an auxiliary support structure and a steering gear to address the problem of wear and reduced efficiency caused by the steering nut rubbing against the inner wall of the steering gear housing during operation.

[0005] An auxiliary support structure, comprising:

[0006] outer shell; and

[0007] A steering screw, the steering screw being disposed within the outer shell and rotatably connected thereto, the steering screw being provided with a steering nut, the steering nut being threadably connected to the steering screw;

[0008] A support assembly, the support assembly comprising a support roller, the support roller being rotatably connected to the outer shell;

[0009] The supporting roller is provided with a first conical surface, and the steering nut is provided with a first veneer. The first conical surface abuts against the first veneer to provide pressure for the first veneer.

[0010] In one embodiment, the structure of the support roller is a frustum structure, the projection of the support roller along the first direction includes a first oblique side, the projection of the steering nut along the first direction includes a second oblique side, the first direction is perpendicular to the axial direction of the steering screw, the first oblique side and the second oblique side are in contact with each other, and an angle α is set between the first oblique side and the axial direction of the steering screw, and the α satisfies: 0°<α<90°.

[0011] In one embodiment, the auxiliary support structure also includes an abutment member, which is arranged between the support roller and the outer shell, one end of the abutment member is connected to the support roller, and the other end of the abutment member is connected to the outer shell, and the abutment member is used to press the support roller toward the first surface.

[0012] In one embodiment, the support assembly further includes a support shaft, the support shaft is fixedly connected to the outer shell, and the support roller is rotatably connected to the support shaft.

[0013] In one embodiment, the abutment member is configured as an elastic member, which is sleeved on the support shaft. The support roller is provided with a first surface and a second surface along the axis of the steering screw. The projection area of ​​the second surface along the axis of the steering screw is larger than that of the first surface. One end of the elastic member abuts against the first surface, and the other end of the elastic member abuts against the outer shell.

[0014] In one embodiment, the support roller is provided with a shoulder, the outer shell is provided with a first bearing, the first bearing is rotatably connected to the support shaft, the first bearing is arranged at one end of the support shaft close to the elastic member, the shoulder is arranged between the elastic member and the support roller, one end of the elastic member abuts against the first bearing, and the other end of the elastic member abuts against the shoulder.

[0015] In one embodiment, the outer shell is further provided with a second bearing, the second bearing is provided at the other end of the supporting shaft, and the second bearing is rotatably connected to the supporting shaft.

[0016] In one embodiment, the steering nut is provided with a sliding portion, the outer shell is provided with a sliding groove, and the sliding portion is slidably connected to the sliding groove.

[0017] The present application also provides a steering device, comprising:

[0018] The auxiliary support structure mentioned above; and

[0019] A steering column is fixedly connected to the steering screw.

[0020] In one embodiment, the steering gear further includes a gear fan, which is disposed in the outer shell and is rotatably connected to the outer shell. The gear fan is provided with first meshing teeth, and the steering nut is provided with second meshing teeth, and the first meshing teeth are meshed with the second meshing teeth.

[0021] The above-mentioned auxiliary support structure, by providing a support roller, on the one hand converts the sliding friction between the steering nut and the outer shell into rolling friction between the steering nut and the support roller, thereby improving the efficiency of the steering gear, reducing the possibility of wear, and thus reducing the possibility of leakage and failure of the steering gear; on the other hand, by applying pressure to the first veneer, the first conical surface and the first veneer are in contact, which can provide a limiting effect on the steering nut, reducing the possibility of the steering nut deviating from the center of rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a front view of the auxiliary support structure of one embodiment of the present application with part of the outer shell removed.

[0023] Figure 2 for Figure 1 A local enlarged schematic diagram of point A in the middle.

[0024] Figure 3 for Figure 2 Front view of the support assembly and steering nut.

[0025] Figure 4 This is a front view of a steering gear according to an embodiment of the present application with part of the outer shell removed.

[0026] Figure Number:

[0027] 10. Auxiliary support structure; 110. Outer shell; 111. First bearing; 112. Second bearing; 113. Slide groove; 120. Steering screw; 121. Steering nut; 1211. Second bevel; 1212. First veneer; 1213. Sliding portion; 1214. Second meshing tooth; 130. Support assembly; 1310. Support roller; 1311. First bevel; 1312. First conical surface; 1313. First surface; 1314. Second surface; 1315. Shoulder; 1320. Support shaft; 140. Abutment; 1410. Elastic member; 20. Steering column; 30. Gear fan; 310. First meshing tooth. DETAILED DESCRIPTION

[0028] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0029] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0030] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0031] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0032] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0034] See also Figures 1 to 4 , Figure 1 This is a front view of the auxiliary support structure 10 according to an embodiment of the present application, with part of the outer shell 110 removed. Figure 2 for Figure 1 A partial enlarged schematic diagram of point A in the middle, Figure 3 for Figure 2 The front view of the support assembly 130 and the steering nut 121, Figure 4 This is a front view of a steering gear according to an embodiment of the present application, with a portion of the outer shell 110 removed.

[0035] Please refer again Figure 1 and Figure 2 The present application provides an auxiliary support structure 10, including an outer shell 110, a steering screw 120 and a support assembly 130. The outer shell 110 and the steering screw 120 are arranged in the outer shell 110 and are rotatably connected to the outer shell 110. The steering screw 120 is provided with a steering nut 121, and the steering nut 121 is threadedly connected to the steering screw 120. The support assembly 130 includes a support roller 1310, and the support roller 1310 is rotatably connected to the outer shell 110. The support roller 1310 is provided with a first conical surface 1312, and the steering nut 121 is provided with a first veneer 1212. The first conical surface 1312 abuts against the first veneer 1212, which is used to press the steering nut 121 onto the steering screw 120.

[0036] The above-mentioned auxiliary support structure 10, by providing a support roller 1310, on the one hand, converts the sliding friction between the steering nut 121 and the outer shell 110 into rolling friction between the steering nut 121 and the support roller 1310, thereby improving the efficiency of the steering gear, reducing the possibility of wear, and thus reducing the possibility of leakage and failure of the steering gear; on the other hand, by applying pressure to the first veneer 1212, the first conical surface 1312 and the first veneer 1212 can provide a limiting effect on the steering nut 121 when they abut, thereby reducing the possibility of the steering nut 121 deviating from the center of rotation.

[0037] Optionally, the first surface 1212 includes an inclined surface, a curved surface, a plane and other surfaces that can abut against the first conical surface 1312. Specifically, in conventional technology, the steering nut 121 needs to directly abut against the inner wall of the outer shell 110, so that the steering nut 121 will not deviate when moving along the axis of the steering screw 120. The present application sets the first conical surface 1312 and the first surface 1212, so that the support roller 1310 can provide a positioning function while changing from sliding to rolling, thereby reducing the deviation of the steering nut 121 when moving along the axis of the steering screw 120.

[0038] More specifically, in some embodiments, the first surface 1212 and the first conical surface 1312 can be partially abutted together or completely abutted together. The size of the abutment area between the two will affect the quality of the positioning effect and the degree of conversion from sliding to rolling. The specific abutment method can be set according to actual usage requirements.

[0039] Please refer again Figure 2 Preferably, in some specific embodiments, the structure of the support roller 1310 is a frustum structure, the projection of the support roller 1310 along the first direction includes a first oblique side 1311, the projection of the steering nut 121 along the first direction includes a second oblique side 1211, the first direction is perpendicular to the axial direction of the steering screw 120, the first oblique side 1311 and the second oblique side 1211 are in contact with each other, and an angle α is set between the first oblique side 1311 and the axial direction of the steering screw 120, and α satisfies: 0°<α<90°.

[0040] Furthermore, if Figure 2 As shown, the axial direction of the steering screw 120 is configured as the X direction, and the rotation axis of the support roller 1310 is configured as the Y direction. The X direction and the Y direction are in the plane XOY. The first direction is configured as the direction perpendicular to the plane XOY. Through the arrangement of the first bevel 1311 and the second bevel 1211, the steering nut 121 can fit the support roller 1310. On the one hand, the support roller 1310 can convert the original sliding friction between the steering nut 121 and the outer shell 110 into the steering nut 121 and the outer shell 110. The rolling friction of the support roller 1310 reduces the possibility of wear on the steering nut 121 and the outer shell 110; on the other hand, by restricting the first bevel 1311 and the axial direction of the steering screw 120, when the steering nut 121 moves along the axial direction of the steering screw 120, the support roller 1310 can generate a circumferential pressing force along the steering screw 120, thereby cooperating with the steering screw 120 to form a positioning effect on the steering nut 121, reducing the possibility of the steering nut 121 deviating from the rotation center of the steering screw 120.

[0041] Please refer again Figure 2 and Figure 3In some specific embodiments, the support assembly 130 further includes a support shaft 1320 , the support shaft 1320 is fixedly connected to the outer shell 110 , and the support roller 1310 is rotatably connected to the support shaft 1320 .

[0042] Optionally, the support shaft 1320 can be rotatably connected to the outer shell 110, and then the support roller 1310 can be fixedly connected to the support shaft 1320. Alternatively, the support shaft 1320 can be fixedly connected to the outer shell 110, and then the support roller 1310 can be rotatably connected to the support shaft 1320. The specific arrangement of the support roller 1310 and the support shaft 1320 can be determined according to actual usage requirements. It is only necessary to ensure that the support roller 1310 can rotate relative to the outer shell 110. By setting the support shaft 1320, the possibility of the support roller 1310 deviating from the preset rotation center during rotation is reduced, and the positioning effect of the support roller 1310 on the steering nut 121 is further increased, thereby reducing the possibility of the steering nut 121 deviating from the rotation center.

[0043] Please refer again Figure 2 and Figure 3 In some specific embodiments, the auxiliary support structure 10 also includes an abutment 140, which is arranged between the support roller 1310 and the outer shell 110, one end of the abutment 140 is connected to the support roller 1310, and the other end of the abutment 140 is connected to the outer shell 110, and the abutment 140 is used to press the support roller 1310 toward the first surface 1212.

[0044] Optionally, the abutment 140 includes an elastic member 1410, a fixing member, and other elements capable of pressing the support roller 1310 toward the first surface 1212. Furthermore, the abutment 140 can be set on the support shaft 1320, or directly set between the support roller 1310 and the inner wall of the outer shell 110. The specific selection of the abutment 140 and how to set the abutment 140 can be set according to actual usage requirements.

[0045] Through the setting of the above-mentioned abutment member 140, it is ensured that even if the supporting roller 1310 or the steering nut 121 is worn, the abutment member 140 can ensure the fit between the two, thereby reducing the situation where the two cannot abut due to wear, increasing the positioning effect of the supporting roller 1310 on the steering nut 121, and further reducing the possibility of the steering nut 121 deviating from the rotation center.

[0046] Please refer again Figure 2 and Figure 3In some specific embodiments, the abutment member 140 is configured as an elastic member 1410, which is sleeved on the support shaft 1320. The support roller 1310 is provided with a first surface 1313 and a second surface 1314 along the axial direction of the steering screw 120. The projection area of ​​the second surface 1314 along the axial direction of the steering screw 120 is larger than that of the first surface 1313. One end of the elastic member 1410 abuts against the first surface 1313, and the other end of the elastic member 1410 abuts against the outer shell 110.

[0047] Optionally, the elastic member 1410 includes a spring, rubber and other elastic elements. The specific selection of the elastic member 1410 can be set according to actual usage requirements. It only needs to be able to apply a force to the support roller 1310 that can approach the steering nut 121. This application does not impose any restrictions on this.

[0048] Furthermore, by arranging an elastic member 1410 on the second surface 1314, the elastic force of the elastic member 1410 will be along the axial direction of the support shaft 1320. When the elastic force is transmitted to the support roller 1310, since the first bevel 1311 arranged on the support roller 1310 is neither parallel to nor perpendicular to the axial direction of the steering screw 120, a component force along the circumference of the steering screw 120 will inevitably be generated, pressing the first bevel 1311 toward the second bevel 1211, thereby reducing the situation where the two cannot abut due to wear, increasing the positioning effect of the support roller 1310 on the steering nut 121, and further reducing the possibility of the steering nut 121 deviating from the rotation center.

[0049] Please refer again Figure 2 and Figure 3 In some specific embodiments, the support roller 1310 is provided with a shoulder 1315, the outer shell 110 is provided with a first bearing 111, the first bearing 111 and the support shaft 1320 are rotatably connected, the first bearing 111 is arranged at one end of the support shaft 1320 close to the elastic member 1410, the shoulder 1315 is arranged between the elastic member 1410 and the support roller 1310, one end of the elastic member 1410 abuts against the first bearing 111, and the other end of the elastic member 1410 abuts against the shoulder 1315.

[0050] Specifically, by setting the shoulder 1315 and the first bearing 111, the elastic member 1410 directly abuts against the shoulder 1315 and the first bearing 111, rather than directly abutting against the support roller 1310 and the outer shell 110. Even if damage occurs, only the shoulder 1315 and the bearing need to be replaced, thereby reducing the cost of daily use and maintenance.

[0051] More specifically, by setting the shoulder 1315, the shoulder 1315 can have a fixing function, and the support roller 1310 can be better fixed on the support shaft 1320 without moving along the axis of the support shaft 1320, thereby reducing the possibility of failure of the support roller 1310 due to sliding of the support roller 1310 on the support shaft 1320.

[0052] Please refer again Figure 2 and Figure 3 In some specific embodiments, the outer shell 110 is further provided with a second bearing 112, and the second bearing 112 is provided at the other end of the support shaft 1320, and the second bearing 112 and the support shaft 1320 are rotatably connected.

[0053] Optionally, the first bearing 111 and the second bearing 112 include ball bearings, radial bearings, and other bearings. Specifically, the first bearing 111 is configured as a tapered roller bearing, and the second bearing 112 is configured as a needle bearing. Through the arrangement of the first bearing 111 and the second bearing 112, the friction between the supporting shaft 1320 and the outer shell 110 during rotation is greatly reduced, thereby reducing the possibility of wear of the supporting shaft 1320.

[0054] Please refer again Figure 3 and Figure 4 In some specific embodiments, the steering nut 121 is provided with a sliding portion 1213, and the outer shell 110 is provided with a sliding groove 113. The sliding portion 1213 is slidably connected to the sliding groove 113. Specifically, the sliding connection between the sliding portion 1213 and the sliding groove 113 allows the steering nut 121 to move along the axis of the steering screw 120 under the constraint of the sliding groove 113, thereby reducing the possibility of deviation of the steering nut 121 during movement.

[0055] Please refer again Figure 4 The present application also provides a steering gear, comprising an auxiliary support structure 10 and a steering column 20, wherein the steering column 20 is fixedly connected to a steering screw 120. Specifically, the steering column 20 can be fixedly connected to the steering screw 120 in a conventional manner. In one embodiment, one end of the steering column 20 can be fixedly connected to the steering screw 120, and the other end can be fixedly connected to the steering wheel to complete the connection between the steering wheel and the steering gear.

[0056] Please refer again Figure 4 In some specific embodiments, the steering gear further includes a gear fan 30, which is disposed in the outer shell 110 and is rotatably connected to the outer shell 110. The gear fan 30 is provided with a first meshing tooth 310, and the steering nut 121 is provided with a second meshing tooth 1214. The first meshing tooth 310 is meshed with the second meshing tooth 1214.

[0057] Please refer again Figure 4 In some embodiments, the gear fan 30 and the steering rocker arm can be rotatably connected, and then the steering rocker arm and the steering knuckle set near the wheel can be connected to complete the connection between the steering gear and the wheel. The specific setting can be carried out in a conventional manner, and this application does not impose any restrictions on this.

[0058] Please refer again Figures 1 to 4 As a preferred embodiment of the present application, when this embodiment works, the following steps are performed:

[0059] (1) Turning the steering wheel drives the steering column 20 to rotate, and drives the steering screw 120 fixedly connected to the steering column 20 to rotate;

[0060] (2) The steering nut 121 moves along the axis of the steering screw 120 and rubs against the support roller 1310, thereby driving the support roller 1310 to rotate by the friction force;

[0061] (3) After the support roller 1310 rotates multiple times over a long period of time, the support roller 1310 or the steering nut 121 will be worn. At this time, the elastic member 1410 presses the support roller 1310 toward the steering nut 121, so that the support roller 1310 can continue to provide positioning for the steering nut 121;

[0062] (4) The movement of the steering nut 121 drives the gear fan 30 engaged with it to swing, and the wheels are driven to steer through the gear fan 30 and the rocker arm connected to the gear fan 30.

[0063] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An auxiliary support structure (10), characterized in that: The auxiliary support structure (10) comprises: an outer shell (110); and a steering screw (120), the steering screw (120) being disposed in the outer shell (110) and being rotatably connected to the outer shell (110), the steering screw (120) being provided with a steering nut (121), the steering nut (121) being threadedly connected to the steering screw (120); A support assembly (130), the support assembly (130) comprising a support roller (1310), the support roller (1310) being rotatably connected to the outer shell (110); The support roller (1310) is provided with a first conical surface (1312), and the steering nut is provided with a first veneer (1212). The first conical surface (1312) abuts against the first veneer (1212) to press the steering nut (121) onto the steering screw (120).

2. The auxiliary support structure (10) according to claim 1, characterized in that The projection of the support roller (1310) along the first direction includes a first oblique side (1311), and the projection of the steering nut (121) along the first direction includes a second oblique side (1211). The first direction is perpendicular to the axial direction of the steering screw (120). The first oblique side (1311) and the second oblique side (1211) are in contact with each other. An angle α is set between the first oblique side (1311) and the axial direction of the steering screw (120), and the α satisfies: 0°<α<90°.

3. The auxiliary support structure (10) according to claim 2, characterized in that: The auxiliary support structure (10) further includes an abutment member (140), which is arranged between the support roller (1310) and the outer shell (110), one end of the abutment member (140) is connected to the support roller (1310), and the other end of the abutment member (140) is connected to the outer shell (110), and the abutment member (140) is used to press the support roller (1310) toward the first veneer (1212).

4. The auxiliary support structure (10) according to claim 3, characterized in that The support assembly (130) further comprises a support shaft (1320), wherein the support shaft (1320) is rotatably connected to the outer shell (110), and the support roller (1310) is fixedly connected to the support shaft (1320).

5. The auxiliary support structure (10) according to claim 4, characterized in that The abutment member (140) is configured as an elastic member (1410), and the elastic member (1410) is sleeved on the support shaft (1320). The support roller (1310) is provided with a first surface (1313) and a second surface (1314) along the axial direction of the steering screw (120), and the projection area of ​​the second surface (1314) along the axial direction of the steering screw (120) is larger than that of the first surface (1313). One end of the elastic member (1410) abuts against the first surface (1313), and the other end of the elastic member (1410) abuts against the outer shell (110).

6. The auxiliary support structure (10) according to claim 5, characterized in that The support roller (1310) is provided with a shoulder (1315), and the outer shell is provided with a first bearing (111). The first bearing (111) and the support shaft (1320) are rotatably connected. The first bearing (111) is provided at one end of the support shaft (1320) close to the elastic member (1410). The shoulder (1315) is provided between the elastic member (1410) and the support roller (1310). One end of the elastic member (1410) abuts against the first bearing (111), and the other end of the elastic member (1410) abuts against the shoulder (1315).

7. The auxiliary support structure (10) according to claim 6, characterized in that The outer shell is further provided with a second bearing (112), and the second bearing (112) is provided at the other end of the supporting rotating shaft (1320), and the second bearing (112) and the supporting rotating shaft (1320) are rotatably connected.

8. The auxiliary support structure (10) according to claim 1, characterized in that The steering nut (121) is provided with a sliding portion (1213), the outer shell (110) is provided with a sliding groove (113), and the sliding portion (1213) is slidably connected to the sliding groove (113).

9. A steering gear, characterized in that: include: The auxiliary support structure (10) according to any one of claims 1 to 8; as well as A steering column (20) is fixedly connected to the steering screw (120).

10. The steering gear according to claim 9, characterized in that The steering gear further comprises a gear fan (30), the gear fan (30) being arranged in the outer shell (110), the gear fan (30) being rotatably connected to the outer shell (110), the gear fan (30) being provided with first meshing teeth (310), the steering nut (121) being provided with second meshing teeth (1214), and the first meshing teeth (310) being meshed with the second meshing teeth (1214).

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