CN112078656A

CN112078656A - Output shaft mechanism and have its steering column and car

Info

Publication number: CN112078656A
Application number: CN201910507735.6A
Authority: CN
Inventors: 谢常云; 滕晓涛; 汪璟; 严才威
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-12-15

Abstract

The invention provides an output shaft mechanism, a steering column with the output shaft mechanism and an automobile, wherein the output shaft mechanism comprises an output shaft and a rolling bearing; the output shaft is provided with a linkage end and an output end, and the linkage end receives power from the transmission device and outputs the power through the output end; the linkage end is provided with a radial end face and an axial boss, the radial end face is arranged at the bottom of the axial boss, the axial boss is connected with the output end, and the axial boss is provided with the rolling bearing; and the rolling bearing is provided with a bearing inner ring and a bearing outer ring, the bearing inner ring is fixedly connected with the axial boss, and an elastic element is arranged between the bearing inner ring and the radial end face in an extruding manner so as to eliminate an axial gap between the output shaft and the rolling bearing. The invention has simple structure, convenient assembly and good performance.

Description

Output shaft mechanism and have its steering column and car

Technical Field

The invention relates to the technical field of automobiles, in particular to an output shaft mechanism, a steering column with the output shaft mechanism and an automobile.

Background

The steering column rotates together with the upper shaft, the lower shaft and the output shaft on the column axis, and the hand power and the motor power on the steering wheel are output through the output shaft, so that the steering force is output. On the steering column axis, there are typically three bearings that support it. Because the output shaft end bearing bears larger rotation torque and torque fluctuation, abnormal sound is easily caused by the play of the bearing.

Disclosure of Invention

In view of this, the present invention provides an output shaft mechanism, a steering column having the output shaft mechanism, and an automobile, so as to eliminate an axial play of an output shaft bearing of the steering column.

The invention provides an output shaft mechanism, which is used for a steering column and comprises an output shaft and a rolling bearing; the output shaft is provided with a linkage end and an output end, and the linkage end receives power from the transmission device and outputs the power through the output end; the linkage end is provided with a radial end face and an axial boss, the radial end face is arranged at the bottom of the axial boss, the axial boss is connected with the output end, and the axial boss is provided with the rolling bearing; and the rolling bearing is provided with a bearing inner ring and a bearing outer ring, the bearing inner ring is fixedly connected with the axial boss, and an elastic element is arranged between the bearing inner ring and the radial end face in an extruding manner so as to eliminate an axial gap between the output shaft and the rolling bearing.

Further, the axial projection range of the elastic element is within the axial projection range of the side surface of the bearing inner ring.

Furthermore, the elastic element is arranged between the bearing inner ring and the radial end face in a circular ring shape, the outer diameter of the elastic element is smaller than that of the bearing inner ring, and the inner diameter of the elastic element is larger than that of the output shaft.

Further, the elastic element comprises a wave spring.

Further, the axial boss surface is smooth.

The invention also provides a steering column, which is provided with a shell and any one of the output shaft mechanisms.

Further, the bearing outer ring is in interference fit with the shell, and the bearing inner ring is in transition fit with the axial boss.

Further, when the steering column adopts the output shaft mechanism, the elastic element is arranged on the axial boss, and then the rolling bearing is assembled.

The present application further provides an automobile having any of the above steering columns.

The invention has simple structure, convenient assembly and good performance.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is an exploded view of an output shaft mechanism according to a preferred embodiment of the present invention.

Fig. 2 is a schematic structural diagram of an output shaft according to a preferred embodiment of the present invention.

Fig. 3 is a schematic structural view of a bearing according to a preferred embodiment of the present invention.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments. It is to be noted that the terms "left", "right", "upper" and "lower" in the following description are used for convenience of understanding and description only, and do not indicate or imply that the components or elements referred to must have a specific orientation, since they are not to be construed as limiting the present invention.

Please refer to fig. 1 to 3. In a preferred embodiment of the present invention, the output shaft mechanism 200 provided in the present invention for the steering column 100 includes an output shaft 20 and a rolling bearing 40.

In detail, in the preferred embodiment, the output shaft 20 has a linkage end 22 and an output end 24, and the linkage end 22 receives power from the transmission 300 and outputs it through the output end 20. The linkage end 22 has a radial end face 222 and an axial boss 224, the radial end face 222 is disposed at the bottom of the axial boss 224, the axial boss 224 is connected to the output end 240, and the rolling bearing 40 is disposed on the axial boss 224.

In detail, in the preferred embodiment, the rolling bearing 40 has a bearing inner ring 402 and a bearing outer ring 404, and the bearing inner ring 402 is fixedly connected to the axial boss 224. The bearing outer race 404 rotates relative to the bearing inner race 402, and the bearing outer race 404 is fixed to the outer housing 102. And an elastic element 60 is arranged between the bearing inner ring 402 and the radial end surface 222 in a pressing mode so as to eliminate the axial clearance between the output shaft 20 and the rolling bearing 40.

More specifically, in the preferred embodiment, the axial projection range of the elastic element 60 is within the axial projection range of the side surface 403 of the bearing inner race 402. In other embodiments, the elastic element 60 may not be coaxial with the output shaft 20 when assembled, but the projection of the elastic element 60 on the axis must be within the range of the side 403 of the bearing cone 402 to ensure that the wave spring is attached to the side 403 of the bearing cone 402 after assembly. For example, in another preferred embodiment, the elastic element 60 is disposed in a circular ring shape between the bearing inner ring 402 and the radial end surface 222, the outer diameter of the elastic element 60 is smaller than the outer diameter of the bearing inner ring 402, and the inner diameter of the elastic element 60 is larger than the outer diameter of the output shaft 20, so as to put the elastic element 60 on the output shaft 20. When the outer diameter of the elastic element 60 is larger than the outer diameter of the bearing inner race 402, the elastic element 60 will rub against the bearing outer race 404, and generate abnormal noise.

More specifically, in the preferred embodiment, the elastic element 60 is a wave spring, the number of turns and the material of which vary with the specific use environment. In other embodiments, the elastic element may be configured to be resilient without the use of external force, such as a leaf spring.

More specifically, in the preferred embodiment, the axial projection 224 has a smooth surface, the output shaft 20 is simple to manufacture, does not require threads or snap ring grooves to be machined thereon, and is easy to install without concern for misalignment, such as when twisting a nut.

Reference is again made to fig. 1. The present application further provides a steering column 100 having a housing 103 and having any of the output shaft mechanisms 200 described above. When the bearing outer ring 404 is installed, the bearing outer ring 404 is in interference fit with the housing 103, and the bearing outer ring 404 is pressed onto the housing 103. The bearing cone 402 is in transition fit with the axial boss 224. The elastic element 60 is arranged on the axial boss 224, and when the elastic element 60 is a wave spring, the wave spring is directly sleeved on the output shaft 20. Then, the output shaft 20 with the wave spring passes through the housing 103 with the bearing 40, and the two are pressed tightly to complete the assembly. After assembly, the wave spring is in a compressed state, in other words, when the wave spring is in the assembled position, the wave spring is compressed to apply a pre-tightening force to the bearing 40 in the axial direction. Because the elastic element 60 is compressed to apply a pre-tightening force to the bearing inner ring 40 in the axial direction, after the bearing inner ring 40 is worn, the elastic element 60 can expand outward to continuously push against the bearing 20.

The present application further provides an automobile having any of the steering columns 100 described above.

In conclusion, the invention can ensure that the adaptive compensation is carried out in the whole life cycle, and the compensation is increased along with the increase of the bearing clearance, thereby eliminating the abnormal sound of the output shaft. The invention has the advantages of simple structure, simple manufacturing process of the output shaft, no need of processing threads or snap spring ring grooves on the output shaft, low cost, simple and convenient assembly, good reliability and capability of avoiding failure risk caused by assembly.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An output shaft mechanism (200) for a steering column (100), comprising an output shaft (20) and a rolling bearing (40), characterized in that:

the output shaft (20) is provided with a linkage end (22) and an output end (24), the linkage end (22) receives power from a transmission device (300) and outputs the power through the output end (24);

the linkage end (22) is provided with a radial end face (222) and an axial boss (224), the radial end face (222) is arranged at the bottom of the axial boss (224), the axial boss (224) is connected with the output end (24), and the rolling bearing (40) is arranged on the axial boss (224); and

the rolling bearing (40) is provided with a bearing inner ring (402) and a bearing outer ring (404), the bearing inner ring (402) is fixedly connected with the axial boss (224), and an elastic element (60) is arranged between the bearing inner ring (402) and the radial end face (222) in an extruding mode to eliminate an axial gap between the output shaft (20) and the rolling bearing (40).

2. The output shaft mechanism (200) of claim 1, wherein: the axial projection range of the elastic element (60) is within the axial projection range of the side surface (403) of the bearing inner ring (402).

3. The output shaft mechanism (200) of claim 1, wherein: the elastic element (60) is arranged between the bearing inner ring (402) and the radial end face (222) in a circular ring shape, the outer diameter of the elastic element (60) is smaller than that of the bearing inner ring (402), and the inner diameter of the elastic element (60) is larger than that of the output shaft (20).

4. The output shaft mechanism (200) of claim 1, wherein: the elastic element (60) comprises a wave spring.

5. The output shaft mechanism (200) of claim 1, wherein: the axial boss (224) is smooth in surface.

6. A steering column (100) having a housing (103), characterized by: having an output shaft mechanism (200) according to any of claims 1 to 5.

7. The steering column (100) of claim 6, wherein: the bearing outer ring (404) is in interference fit with the shell (103), and the bearing inner ring (402) is in transition fit with the axial boss (224).

8. The steering column (100) of claim 6, wherein: when the steering column (100) adopts the output shaft mechanism (200), the elastic element (60) is arranged on the axial boss (224), and then the rolling bearing (40) is assembled.

9. An automobile, characterized in that: having a steering column (100) according to any of claims 6 to 8.