CN216611340U

CN216611340U - Gear shaft bearing locking structure of input end of steering gear

Info

Publication number: CN216611340U
Application number: CN202123393030.8U
Authority: CN
Inventors: 王正成; 王进丁; 陈修华; 胡立靖
Original assignee: Changhui Automobile Steering System Huangshan Co ltd
Current assignee: Changhui Automobile Steering System Huangshan Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-05-27
Anticipated expiration: 2031-12-30

Abstract

The utility model provides a locking structure for a gear shaft bearing at the input end of a steering gear, which comprises a gear shaft, wherein a bearing is sleeved on the gear shaft, a ring groove is formed in the outer peripheral surface of the gear shaft, a press riveting ring is arranged in the ring groove, and the bearing is limited and fixed between the press riveting ring and a boss surface of the gear shaft after the press riveting ring is extruded and deformed. The axial check ring limiting structure solves the problems that the traditional axial check ring limiting structure is easy to form an axial gap and can cause noise during driving.

Description

Gear shaft bearing locking structure of input end of steering gear

Technical Field

The utility model relates to the technical field of electric power-assisted steering devices, in particular to a locking structure for a gear shaft bearing at the input end of a steering device.

Background

At present, the steering gear of the passenger vehicle mainly adopts an electric power-assisted steering gear, and is mainly divided into three types of a pipe column type C-EPS, a rack and pinion type P-EPS or DP-EPS and a rack and pinion type R-EPS according to the structural form. The electric steering gear mainly comprises an input end torque corner sensor, a speed reduction assisting mechanism, a main controller, a motor, a vehicle speed sensor and the like. The basic principle is that a main controller receives a torque corner signal, an actual vehicle ignition signal, a vehicle speed signal and an engine signal of an input shaft assembly, and outputs a control signal to control a motor to move according to a specified torque, a specified rotation direction and a specified angle according to a specific calculation mode and the assistance characteristic confirmed by actual vehicle debugging. The electric power steering gear has the advantages of energy conservation, high safety performance, environmental friendliness and the like, is also a basic executive component of an automatic driving system, is a main development direction of future steering technologies along with development and popularization of an intelligent driving mode, and has more severe requirements on driving comfort noise along with continuous improvement of living standards of people.

The input shaft assembly structure in the traditional double-gear electric power steering gear comprises a gear shaft, a rolling bearing, a torsion bar, an input shaft and the like, wherein an axial retainer ring is adopted on the input shaft to axially position the rolling bearing, but an axial gap is easily formed between the axial retainer ring and the bearing, and noise can be caused when the input end is reversely reversed, so that the driving comfort is influenced. Therefore, the utility model discloses a locking structure for a gear shaft bearing at the input end of a steering gear.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a locking structure for a gear shaft bearing at the input end of a steering gear, which solves the problems that the traditional axial retainer ring limiting structure is easy to form an axial gap and can cause noise during driving.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides a steering gear input gear shaft bearing lock solid structure, includes the gear shaft, the gear shaft on the cover have a bearing, be provided with the annular on the outer peripheral face of gear shaft, the annular in be provided with the pressure and rivet the ring, the pressure rivet ring extrusion deformation after fix the bearing spacing between the boss face of pressure riveting ring and gear shaft.

Further, the outer diameter of the pressure riveting ring is smaller than or equal to the outer diameter of the inner ring of the bearing.

Furthermore, the circumferential trisection positions of the riveting rings are provided with a riveting point.

Further, the material of the pressure riveting ring is 20# GB/T699 carbon structural steel.

The utility model has the beneficial effects that: according to the utility model, the press-riveting ring is arranged in the ring groove of the gear shaft to fix the limiting bearing, and the press-riveting ring can deform after being extruded, so that the axial gap between the press-riveting ring and the end surface of the rolling bearing is eliminated, the input shaft is enabled to have no possibility of axial movement between the gear shaft and the rolling bearing in the forward and reverse steering processes, no noise is generated, and the comfort of drivers and passengers is ensured.

The utility model will be explained in more detail below with reference to the drawings and examples.

Drawings

Fig. 1 is a cross-sectional view of a locking structure for a gear shaft bearing at an input end of a steering gear according to the present invention.

Fig. 2 is a sectional view of a gear shaft in the present invention.

Fig. 3 is a structural diagram of the squeeze riveting ring of the utility model, mainly showing the positions of three squeeze riveting points.

Detailed Description

The locking structure for the bearing of the gear shaft at the input end of the steering gear comprises a gear shaft 1, wherein a bearing 2 is sleeved on the gear shaft 1; as shown in fig. 2, the outer circumferential surface of the gear shaft 1 is provided with a ring groove 11, the ring groove 11 is provided with a press riveting ring 3, and the press riveting ring 3 is extruded and deformed to fix the bearing 2 between the press riveting ring 3 and the boss surface of the gear shaft 1 in a limiting manner.

Further, in order to better limit the bearing 2, the outer diameter of the riveting ring 3 is smaller than or equal to the outer diameter of the inner ring of the bearing 2.

Further, in order to enable three riveting points to be uniformly arranged and better enable the riveting ring 3 to deform in the ring groove 11, the circumferential trisection positions of the riveting ring 3 are respectively provided with one riveting point.

Further, in order to ensure that the material has appropriate plasticity during riveting and ensure the strength requirement, the material of the riveting ring 3 is 20# GB/T699 carbon structural steel.

The principle of the utility model is as follows: after the bearing 2 and the press riveting ring 3 are assembled, a special clamp is adopted to apply radial pressure on three riveting points (such as the positions circled in figure 3) at trisection positions on the excircle of the press riveting ring 3, so that the inner hole of the press riveting ring 3 is ensured to be in close contact with the bottom of the ring groove 11 on the gear shaft 1 along with the radial force applied by the clamp; because the pressure riveting ring 3 has certain plasticity, the radial upsetting phenomenon can occur in the pressure riveting process, so that the two sides of the pressure riveting ring 3 are tightly attached to the two sides of the inner wall of the annular groove 11; furthermore, the thickness of the part, exposed out of the ring groove 11, of the pressure riveting ring 3 can be thickened after being pressed in the pressure riveting process, so that the axial gap between the pressure riveting ring 3 and the end face of the bearing 2 is eliminated, the input shaft is in the positive and negative steering process, and the possibility of axial movement between the gear shaft 1 and the bearing 2 is avoided.

The utility model has been described above with reference to the accompanying drawings, and it is to be understood that the utility model is not limited in its application to the details of construction and to the arrangements of the components set forth in the following description, since various modifications may be made without departing from the spirit or scope of the utility model.

Claims

1. The utility model provides a steering gear input gear shaft bearing lock solid structure, includes gear shaft (1), gear shaft (1) go up the cover and have bearing (2), characterized by, be provided with annular (11) on the outer peripheral face of gear shaft (1), annular (11) in be provided with and press riveting ring (3), press riveting ring (3) extrusion deformation after with bearing (2) spacing fix between the boss face of pressing riveting ring (3) and gear shaft (1).

2. The steering gear input gear shaft bearing locking structure according to claim 1, wherein the outer diameter of the clinch ring (3) is smaller than or equal to the outer diameter of the inner race of the bearing (2).

3. The locking structure of the input end gear shaft bearing of the steering gear according to claim 1, wherein the circumferential trisection positions of the riveting ring (3) are provided with a riveting point.

4. The locking structure of the input end gear shaft bearing of the steering gear according to any one of claims 1 to 3, wherein the material of the pressure riveting ring (3) is 20# GB/T699 carbon structural steel.