Steering gear assembly and vehicle

Abstract

The utility model discloses a steering gear assembly and a vehicle, the steering gear assembly comprises a shell, an accommodating cavity is formed in the shell, a lead screw is rotatably arranged in the accommodating cavity, and a first matching part is formed on the inner wall of the accommodating cavity; the bearing outer ring is arranged in the containing cavity and arranged on the periphery of the lead screw in a sleeving mode, and a second matching part connected with the first matching part is formed on the peripheral wall of the bearing outer ring so as to be suitable for limiting the bearing outer ring in the axis direction; and the bearing inner ring is rotatably arranged on the bearing outer ring and is supported on the periphery of the lead screw. According to the steering gear assembly, the number of parts can be reduced, the overall cost is reduced, and the reliability is higher.

Description

Technical Field

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

[0002] In the related technology, as the load on the front axle of the automobile increases, the demand for high-thrust electric power steering gears is increasing. Existing steering gears usually adopt a ball screw structure with strong load-bearing capacity. The installation and fixation of the ball screw requires the use of an additional tightening mechanism. The fastening screw plug is screwed into the housing thread to axially compress the four-point bearing to fix the ball screw. However, the above fixing method requires the addition of additional fastening screws or bolts, which has many parts, higher costs, and complex assembly processes. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a steering gear assembly, which can reduce the number of parts, reduce the overall cost, and has higher reliability.

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

[0005] The steering gear assembly according to the embodiment of the present application includes: a housing, a housing having an accommodating cavity formed therein, a lead screw rotatably arranged in the accommodating cavity, a first matching portion formed on the inner wall of the accommodating cavity; a bearing outer ring, the bearing outer ring being arranged in the accommodating cavity and sleeved on the outer periphery of the lead screw, a second matching portion connected to the first matching portion being formed on the outer peripheral wall of the bearing outer ring so as to limit the bearing outer ring along the axial direction; a bearing inner ring, the bearing inner ring being rotatably arranged on the bearing outer ring and supported on the outer periphery of the lead screw.

[0006] According to the steering gear assembly of the embodiment of the present application, the steering gear assembly has a shell, a accommodating cavity is formed in the shell, a first matching portion is formed on the inner wall of the accommodating cavity, the outer ring of the bearing is accommodated in the accommodating cavity and a second matching portion matching with the first matching portion is formed on the outer peripheral wall of the outer ring of the bearing. By matching the first matching portion with the second matching portion, the outer ring of the bearing can be directly fixed to the shell, eliminating the bolt structure in the prior art, reducing the number of parts and components, and reducing the overall cost and assembly difficulty of the steering gear assembly.

[0007] In some embodiments of the present application, the first mating portion is configured as a first threaded portion circumferentially disposed on the outer peripheral wall of the bearing outer ring, and the second mating portion is configured as a second threaded portion circumferentially disposed on the inner wall of the accommodating cavity and threadably mating with the first threaded portion.

[0008] In some embodiments of the present application, the first threaded portion and the second threaded portion are respectively extended in the axial direction of the bearing outer ring.

[0009] In some embodiments of the present application, one of the first matching portion and the second matching portion is configured as a snap-fitting protrusion, and the other of the first matching portion and the second matching portion is configured as a snap-fitting groove that matches with the snap-fitting protrusion.

[0010] In some embodiments of the present application, the locking protrusion structure is a plurality of structures arranged at intervals in the circumferential direction, and the locking groove structure is a plurality of structures arranged in a one-to-one correspondence with the plurality of the locking protrusions.

[0011] In some embodiments of the present application, a first stop surface is formed on one side of the snap-fit ​​protrusion in the axial direction, and a second stop surface abutting against the first stop surface is formed in the snap-fit ​​groove to limit the outer ring of the bearing along the axial direction.

[0012] In some embodiments of the present application, a support portion extending radially toward the lead screw is formed on an inner wall of the accommodating cavity, and a support surface is formed on a side of the support portion facing the outer ring of the bearing.

[0013] In some embodiments of the present application, a mounting groove recessed inwardly is formed on a surface of the bearing outer ring facing away from the housing.

[0014] In some embodiments of the present application, the mounting grooves are configured to be multiple and spaced apart in the circumferential direction.

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

[0016] According to the embodiment of the present application, the vehicle is provided with the steering gear assembly of the above embodiment. Since the vehicle of the embodiment of the present application is provided with the steering gear assembly of the above embodiment, the steering gear assembly of the vehicle can directly fix the outer ring of the bearing on the housing by matching the first matching part with the second matching part, thereby eliminating the bolt structure in the prior art, reducing the number of parts and components, and reducing the overall cost and assembly difficulty of the steering gear assembly.

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

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

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

[0020] Figure 2 yes Figure 1 Assembly diagram of the middle lead screw, the inner ring of the bearing and the outer ring of the bearing;

[0021] Figure 3 yes Figure 2 Schematic diagram of the explosion.

[0022] Reference numerals:

[0023] 10. Steering gear assembly; 11. Housing; 111. Accommodating chamber; 112. Lead screw; 113. First matching portion; 114. Support portion; 1141. Support surface; 12. Bearing outer ring; 121. Second matching portion; 122. Mounting groove; 13. Bearing inner ring; 141. Dust cover; 142. Ball; 143. Inverter; 144. Steel ball. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0025] Reference below Figure 1-Figure 3 A steering gear assembly 10 according to an embodiment of the present application is described, and the steering gear assembly 10 includes a housing 11, a bearing outer ring 12 and a bearing inner ring 13. A accommodating chamber 111 is formed in the housing 11, and a lead screw 112 is rotatably arranged in the accommodating chamber 111. A first matching portion 113 is formed on the inner wall of the accommodating chamber 111. The bearing outer ring 12 is arranged in the accommodating chamber 111 and is sleeved on the outer periphery of the lead screw 112. A second matching portion 121 connected to the first matching portion 113 is formed on the outer peripheral wall of the bearing outer ring 12 to limit the bearing outer ring 12 along the axial direction. The bearing inner ring 13 is rotatably arranged on the bearing outer ring 12 and supported on the outer periphery of the lead screw 112.

[0026] At present, steering gears usually adopt a ball screw structure with strong load-bearing capacity. The installation and fixation of the ball screw requires the use of an additional tightening mechanism. The ball screw is fixed by screwing the fastening screw plug into the housing thread and axially pressing the four-point bearing. However, the above fixing method requires the addition of additional fastening screws or bolts, which has many parts, higher costs, and complex assembly processes.

[0027] like Figure 1As shown, specifically, the steering gear assembly 10 may include a housing 11 and a bearing assembly. A accommodating cavity 111 may be formed in the housing 11. A screw 112 may be disposed in the accommodating cavity 111, and the screw 112 may be able to rotate relative to the housing 11. The bearing assembly is sleeved on the outer periphery of the screw 112, and at least a portion of the bearing assembly may be accommodated in the accommodating cavity 111.

[0028] Further, the bearing assembly may include a bearing outer ring 12 and a bearing inner ring 13. The bearing outer ring 12 may be arranged in the accommodating cavity 111, and the bearing outer ring 12 may be sleeved on the outer periphery of the lead screw 112. The bearing outer ring 12 and the housing 11 may be detachably connected by snapping or plugging, or the bearing outer ring 12 and the housing 11 may be detachably connected by bolts or threads. The bearing inner ring 13 may be arranged between the bearing outer ring 12 and the lead screw 112. Balls 142 are arranged between the bearing inner ring 13 and the bearing outer ring 12. After the bearing outer ring 12 and the housing 11 are fixed, the bearing inner ring 13 can rotate relative to the bearing outer ring 12, and the bearing inner ring 13 can support the outer periphery of the lead screw 112. When the bearing inner ring 13 rotates, the bearing inner ring 13 can drive the lead screw 112 to rotate synchronously, thereby playing a role of power steering.

[0029] Among them, the inner wall of the accommodating cavity 111 can be formed with a first matching portion 113, and the outer peripheral wall of the bearing outer ring 12 is formed with a second matching portion 121. The first matching portion 113 can be matched and fixed with the second matching portion 121. In some embodiments, the first matching portion 113 and the second matching portion 121 can be fixed by threaded connection or clamping, and the bearing outer ring 12 can be limited along the axial direction by matching and fixing the first matching portion 113 with the second matching portion 121. Compared with the prior art, the bolt structure in the prior art can be omitted by matching and fixing the first matching portion 113 with the second matching portion 121, thereby reducing the number of parts, reducing the overall cost and assembly difficulty of the steering gear assembly 10, and providing a certain space for the installation of other parts in the steering gear assembly 10.

[0030] In short, the steering gear assembly 10 of the embodiment of the present application has a shell 11, a accommodating cavity 111 is formed in the shell 11, and a first matching portion 113 is formed on the inner wall of the accommodating cavity 111. The bearing outer ring 12 is accommodated in the accommodating cavity 111 and a second matching portion 121 matching with the first matching portion 113 is formed on the outer peripheral wall of the bearing outer ring 12. By matching the first matching portion 113 with the second matching portion 121, the bearing outer ring 12 can be directly fixed to the shell 11, eliminating the bolt structure in the prior art, reducing the number of components, and reducing the overall cost and assembly difficulty of the steering gear assembly 10.

[0031] like Figure 1As shown, in some embodiments of the present application, the first matching portion 113 can be constructed as a first threaded portion, and the first threaded portion can be circumferentially arranged on the outer peripheral wall of the bearing outer ring 12, and the second matching portion 121 can be constructed as a second threaded portion threadedly connected to the first threaded portion, and the second threaded portion can be circumferentially arranged on the inner wall of the accommodating cavity 111, and the first threaded portion can be threadedly connected to the second threaded portion to fix the bearing outer ring 12 on the housing 11. In actual use, the staff first sets the bearing outer ring 12 opposite to the accommodating cavity 111, and rotates the bearing outer ring 12 to make the first threaded portion and the second threaded portion match, and the bearing outer ring 12 moves toward the accommodating cavity 111. When the bearing outer ring 12 moves to a certain position, the staff can prevent the bearing outer ring 12 from rotating by welding or using fixings, thereby fixing the bearing outer ring 12 on the housing 11. Furthermore, the first threaded portion and the second threaded portion are respectively extended in the axial direction of the bearing outer ring 12 to limit the bearing outer ring 12 along the axial direction to prevent the bearing outer ring 12 from sliding out along the axial direction and affecting the normal operation of the steering gear assembly 10.

[0032] In some embodiments of the present application, one of the first matching portion 113 and the second matching portion 121 can be configured as a clamping protrusion, and the other of the first matching portion 113 and the second matching portion 121 can be configured as a clamping groove that matches the clamping protrusion. The clamping protrusion is clamped with the clamping groove to achieve the fixing of the bearing outer ring 12 on the housing 11. Specifically, the first matching portion 113 can be configured as a clamping groove, and the second matching portion 121 can be configured as a clamping protrusion. By clamping the clamping protrusion with the clamping groove, the clamping protrusion is accommodated in the clamping groove, and the outer surface of the clamping protrusion abuts against the inner surface of the clamping groove to limit the movement of the clamping protrusion, so that the bearing outer ring 12 is fixed on the housing 11. A first abutting surface is formed on one side of the clamping protrusion in the axial direction, and a second abutting surface abutting against the first abutting surface is formed in the clamping groove. The first abutting surface abuts against the second abutting surface to achieve the function of limiting the bearing outer ring 12 along the axial direction.

[0033] Furthermore, the snap-fitting protrusions can be constructed in plurality, and the plurality of snap-fitting protrusions can be arranged at intervals in the circumferential direction. The snap-fitting grooves can be constructed in plurality, and the plurality of snap-fitting grooves can be arranged one-to-one corresponding to the plurality of snap-fitting protrusions, respectively. By adopting a plurality of snap-fitting protrusions and a plurality of snap-fitting groove structures, the connection strength between the bearing outer ring 12 and the housing 11 can be improved.

[0034] like Figure 1As shown, in some embodiments of the present application, a support portion 114 is formed on the inner wall of the accommodating cavity 111, and the support portion 114 can be used to support the bearing outer ring 12 and prevent the bearing outer ring 12 from being limited in the axial direction. Specifically, a support surface 1141 is formed on the side of the support portion 114 facing the bearing outer ring 12, and the support surface 1141 can fit with the bearing outer ring 12. During actual assembly, the staff rotates the bearing outer ring 12 to move the bearing outer ring 12 toward the inside of the accommodating cavity 111 until the bearing outer ring 12 abuts against the support surface 1141. The staff can determine that the bearing outer ring 12 is already in the installation position. At this time, the bearing outer ring 12 and the housing 11 are fixed by welding or fixings to complete the installation of the bearing outer ring 12.

[0035] like Figure 1-Figure 3 As shown, in some embodiments of the present application, a mounting groove 122 is formed on the surface of the bearing outer ring 12 facing away from the housing 11, and the mounting groove 122 can be set to be recessed toward the inside of the bearing outer ring 12. The mounting groove 122 can be used for rotating the bearing outer ring 12. During actual assembly, the staff can extend into the mounting groove 122 through the tooling and abut against the inner wall of the mounting groove 122, and then rotate the bearing outer ring 12 through the tooling to achieve the assembly of the bearing outer ring 12. In some embodiments, a plurality of mounting grooves 122 can be constructed, and the plurality of mounting grooves 122 can be spaced apart in the circumferential direction. The use of a plurality of mounting grooves 122 structures can facilitate the staff to assemble the bearing outer ring 12.

[0036] like Figure 3 As shown, in some embodiments of the present application, the bearing assembly also includes a dust cover 141, which can play a dust-proof role. A ball 142 is arranged between the bearing outer ring 12 and the bearing inner ring 13. The ball 142 can be constructed in multiple numbers, and the ball 142 can be fixedly connected by a retaining frame. The bearing inner ring 13 may include an inverter 143 and a steel ball 144.

[0037] The following is a brief description of a vehicle according to an embodiment of the present application.

[0038] According to the embodiment of the present application, the vehicle is provided with the steering gear assembly 10 of the above embodiment. Since the vehicle of the embodiment of the present application is provided with the steering gear assembly 10 of the above embodiment, the steering gear assembly 10 of the vehicle can directly fix the bearing outer ring 12 on the housing 11 by matching the first matching portion 113 with the second matching portion 121, thereby eliminating the bolt structure in the prior art, reducing the number of parts and components, and reducing the overall cost and assembly difficulty of the steering gear assembly 10.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0041] In the description of the present application, “plurality” means two or more.

[0042] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0043] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0045] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A steering gear assembly, characterized in that: include: A housing (11), wherein a receiving chamber (111) is formed in the housing (11), a lead screw (112) is rotatably arranged in the receiving chamber (111), and a first matching portion (113) is formed on an inner wall of the receiving chamber (111); a bearing outer ring (12), the bearing outer ring (12) being arranged in the accommodating cavity (111) and sleeved on the outer periphery of the lead screw (112), a second matching portion (121) connected to the first matching portion (113) being formed on the outer peripheral wall of the bearing outer ring (12) so as to limit the bearing outer ring (12) along the axial direction; A bearing inner ring (13) is rotatably disposed on the bearing outer ring (12) and supported on the outer periphery of the lead screw (112).

2. The steering gear assembly according to claim 1, characterized in that: The first mating portion (113) is configured as a first threaded portion circumferentially disposed on the outer peripheral wall of the bearing outer ring (12), and the second mating portion (121) is configured as a second threaded portion circumferentially disposed on the inner wall of the accommodating cavity (111) and threadably mated with the first threaded portion.

3. The steering gear assembly according to claim 2, characterized in that: The first threaded portion and the second threaded portion are respectively extended in the axial direction of the bearing outer ring (12).

4. The steering gear assembly according to claim 1, characterized in that: One of the first matching portion (113) and the second matching portion (121) is configured as a snap-fitting protrusion, and the other of the first matching portion (113) and the second matching portion (121) is configured as a snap-fitting groove that matches the snap-fitting protrusion.

5. The steering gear assembly according to claim 4, characterized in that: The clamping protrusions are multiple and spaced apart in the circumferential direction, and the clamping grooves are multiple and arranged in one-to-one correspondence with the multiple clamping protrusions.

6. The steering gear assembly according to claim 5, characterized in that: The clamping protrusion is formed with a first stop surface on one side in the axial direction, and the clamping groove is formed with a second stop surface abutting against the first stop surface so as to limit the bearing outer ring (12) along the axial direction.

7. The steering gear assembly according to claim 1, characterized in that: The inner wall of the accommodating cavity (111) is formed with a support portion (114) extending radially toward the lead screw (112), and a support surface (1141) is formed on a side of the support portion (114) facing the bearing outer ring (12).

8. The steering gear assembly according to claim 1, characterized in that: A mounting groove (122) recessed toward the inside is formed on a surface of the bearing outer ring (12) facing away from the housing (11).

9. The steering gear assembly according to claim 8, characterized in that: The installation grooves (122) are configured to be a plurality of grooves that are spaced apart in the circumferential direction.

10. A vehicle, characterized in that: Comprising a steering gear assembly as described in any one of claims 1-9.

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