Steering bearing limiting structure

Abstract

The utility model discloses a steering bearing limit structure which comprises a steering shaft and a steering column, a bearing and a locking nut are sleeved on the peripheral wall of the steering shaft, the steering shaft is provided with a step, one side of an inner ring of the bearing abuts against the step, the other side of the inner ring of the bearing abuts against the locking nut, and an outer ring of the bearing abuts against the steering column. An external thread is arranged on the outer circumferential wall of the steering shaft, and an internal thread matched with the external thread is arranged on the inner circumferential wall of the locking nut. The locking nut is used for replacing a clamping spring, axial clearances of parts related to the steering shaft in the steering system are effectively eliminated, the problem that abnormal sound is generated in the steering system process is avoided, the assembling mode that the locking nut is installed on the steering shaft through the external threads and the internal threads is convenient and fast, and consistency is controllable.

Description

Technical Field

[0001] The utility model relates to the technical field of steering gear accessories, in particular to a steering bearing limiting structure. Background Art

[0002] At present, the steering column assembly is one of the important components in the automobile steering system, which transmits the torque applied by the driver to the steering wheel and drives the steering gear to control the direction of the car. The steering column bearing in the steering column assembly is one of the main parts of the steering column, and is an important part that directly affects the normal driving and steering of the vehicle. The study of the axial fixing method of the bearing is also a research direction for the diversification and low cost of the steering column structure. Chinese patent CN201120097593.X discloses an axial fixing device for the steering column bearing, which supports the steering shaft through the protruding end of the corrugated retaining spring, limiting the axial movement of the bearing toward the steering shaft, but the corrugated retaining spring cannot completely eliminate the axial clearance between the components. The existence of the axial clearance may cause the bearing to move unexpectedly during the rotation process, thereby generating abnormal noise when turning. Utility Model Content

[0003] In view of the problem that the wave retaining spring cannot completely eliminate the axial clearance between components, the utility model proposes a steering bearing limiting structure, which utilizes a locking nut instead of the retaining spring to effectively eliminate the axial clearance of components related to the steering shaft in the steering system and avoid abnormal noise problems during the steering system process.

[0004] The technical solution adopted by the utility model is as follows: a steering bearing limiting structure, comprising a steering shaft and a steering column, the outer peripheral wall of the steering shaft is sleeved with a bearing and a locking nut, the steering shaft is provided with a step, one side of the bearing inner ring abuts against the step, the other side of the bearing inner ring abuts against the locking nut, the bearing outer ring abuts against the steering column, the outer peripheral wall of the steering shaft is provided with an external thread, and the inner peripheral wall of the locking nut is provided with an internal thread matching the external thread.

[0005] Optionally, a plurality of grooves are provided at intervals on the outer peripheral wall of the locking nut.

[0006] Optionally, the diameter of the step is greater than the diameter of the steering shaft.

[0007] Optionally, the plurality of grooves are evenly spaced apart along the outer peripheral wall of the locking nut.

[0008] Optionally, an annular groove is provided on the inner peripheral wall of the steering column, and the outer ring of the bearing cooperates with the annular groove.

[0009] Optionally, one end of the steering shaft close to the step is coaxially connected with an output shaft, the steering shaft and the output shaft are connected via a spline, and a reduction assembly is sleeved on the outer peripheral wall of the output shaft.

[0010] Optionally, the outer wall of the steering column is provided with a mounting bracket for connecting to the entire vehicle.

[0011] Optionally, the locking nut is made of metal.

[0012] The beneficial effects of the utility model are: using the locking nut instead of the retaining spring can effectively eliminate the axial clearance of the components related to the steering shaft in the steering system, avoid the problem of abnormal noise during the steering system process, and the assembly form of installing the locking nut on the steering shaft through the external thread and the internal thread is convenient and fast, and the consistency is controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A cross-sectional view of a steering bearing limiting structure proposed in an embodiment of the utility model;

[0014] Figure 2 A schematic diagram of the structure of the steering bearing limiting structure proposed in an embodiment of the utility model;

[0015] Figure 3 A schematic diagram of a locking nut of a steering bearing limiting structure proposed in an embodiment of the utility model.

[0016] The markings in the drawings are: 1, steering shaft; 11, step; 2, steering column; 21, ring groove; 3, bearing; 4, locking nut; 41, groove; 42, internal thread; 5, output shaft; 6, reduction assembly; 7, mounting bracket. DETAILED DESCRIPTION

[0017] 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 should also be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. Multiple technical solutions in the same embodiment, and multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not have contradictions or conflicts, all of which are within the scope of protection required by the present utility model.

[0018] like Figure 1 and 2As shown, this embodiment discloses a steering bearing limiting structure, including a steering shaft 1 and a steering column 2, the outer peripheral wall of the steering shaft 1 is sleeved with a bearing 3 and a locking nut 4, the steering shaft 1 is provided with a step 11, one side of the inner ring of the bearing 3 abuts against the step 11, the other side of the inner ring of the bearing 3 abuts against the locking nut 4, the outer ring of the bearing 3 abuts against the steering column 2, the outer peripheral wall of the steering shaft 1 is provided with an external thread, and the inner peripheral wall of the locking nut 4 is provided with an internal thread 42 that matches the external thread. The locking nut 4 is used instead of the retaining spring to effectively eliminate the axial clearance of the components related to the steering shaft 1 in the steering system, avoid the problem of abnormal noise during the steering system, and the assembly form of installing the locking nut 4 on the steering shaft 1 through the external thread and the internal thread 42 is convenient and fast, and the consistency is controllable.

[0019] In this embodiment, if Figure 3 As shown, the outer peripheral wall of the locking nut 4 is provided with a plurality of grooves 41 at intervals. The grooves 41 are convenient for increasing the friction force of the outer surface of the locking nut 4 and are easy to install and remove. The plurality of grooves 41 are evenly spaced and distributed along the outer peripheral wall of the locking nut 4.

[0020] In this embodiment, if Figure 1 As shown, the diameter of the step 11 is larger than the diameter of the steering shaft 1. The step 11 and the locking nut 4 fix the two sides of the bearing 3 respectively.

[0021] In this embodiment, if Figure 1 As shown, the inner peripheral wall of the steering column 2 is provided with an annular groove 21, and the outer ring of the bearing 3 cooperates with the annular groove 21. The annular groove 21 limits the axial position of the bearing 3. The outer ring of the bearing 3 is pressed into the annular groove 21 by riveting, and has an interference fit with the annular groove 21. The locking nut 4 is made of metal.

[0022] In this embodiment, if Figure 1 As shown, the output shaft 5 is coaxially connected to one end of the steering shaft 1 near the step 11, and the steering shaft 1 and the output shaft 5 are connected by a spline, and the outer peripheral wall of the output shaft 5 is sleeved with a reduction assembly 6. One end of the steering shaft 1 is connected to the steering wheel, and the other end of the steering shaft 1 is connected to the output shaft 5. The reduction assembly 6 applies power to the steering wheel through the output shaft 5 and the input shaft, and the spline connection is conducive to ensuring the coaxiality between the steering shaft 1 and the output shaft 5. The reduction assembly 6 can be a worm gear and worm reduction assembly 6, a planetary gear reduction or a pulley reduction assembly 6, which is the prior art.

[0023] In this embodiment, if Figure 1 and 2 As shown, the outer wall of the steering column 2 is provided with a mounting bracket 7 for connecting with the whole vehicle. The mounting bracket 7 can mount the steering column 2 on the whole vehicle.

[0024] The above description is only a preferred embodiment of the utility model, and does not limit the patent protection scope of the utility model. Any equivalent structural transformation made using the contents of the utility model specification and drawings, directly or indirectly used in other related technical fields, is also included in the protection scope of the utility model.

Claims

1. A steering bearing limiting structure, characterized in that: It comprises a steering shaft and a steering column, wherein the outer peripheral wall of the steering shaft is sleeved with a bearing and a locking nut, the steering shaft is provided with a step, one side of the inner ring of the bearing abuts against the step, and the other side of the inner ring of the bearing abuts against the locking nut, the outer ring of the bearing abuts against the steering column, the outer peripheral wall of the steering shaft is provided with an external thread, and the inner peripheral wall of the locking nut is provided with an internal thread matching the external thread.

2. The steering bearing limiting structure according to claim 1, characterized in that: The outer peripheral wall of the locking nut is provided with a plurality of grooves at intervals.

3. The steering bearing limiting structure according to claim 1, characterized in that: The diameter of the step is greater than the diameter of the steering shaft.

4. The steering bearing limiting structure according to claim 2, characterized in that: The plurality of grooves are evenly spaced and distributed along the outer peripheral wall of the locking nut.

5. The steering bearing limiting structure according to claim 1, characterized in that: The inner peripheral wall of the steering column is provided with an annular groove, and the outer ring of the bearing cooperates with the annular groove.

6. The steering bearing limiting structure according to claim 1, characterized in that: An output shaft is coaxially connected to one end of the steering shaft close to the step. The steering shaft and the output shaft are connected via a spline. A reduction assembly is sleeved on the outer peripheral wall of the output shaft.

7. The steering bearing limiting structure according to claim 1, characterized in that: The outer wall of the steering column is provided with a mounting bracket for connecting with the whole vehicle.

8. The steering bearing limiting structure according to claim 1, characterized in that: The locking nut is made of metal.

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