CN214578389U

CN214578389U - Bearing pretightening force adjusting device

Info

Publication number: CN214578389U
Application number: CN202023202320.5U
Authority: CN
Inventors: 姚望; 杨佳彬; 杨建美; 祁中宽; 范一龙
Original assignee: 703th Research Institute of CSIC
Current assignee: 703th Research Institute of CSIC
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-11-02
Anticipated expiration: 2030-12-25

Abstract

An object of the utility model is to provide a bearing pretightning force adjusting device, including casing, axle, bearing, spring housing, adjusting nut, the axle is installed in the casing, and bearing, spring housing, adjusting nut are located between axle and casing, the inner ring and the axle cooperation of bearing, the outer loop and the casing cooperation of bearing, and the spring housing compresses tightly in the side of bearing outer loop, and the spring is installed to the spring housing, screw-thread fit between adjusting nut and the casing, and the tip of spring stretches out to the spring housing outside, and adjusting nut's terminal surface pastes in the spring. The utility model has the characteristics of simple structure, convenient to use, use operating mode are many etc. By replacing the spring, the axial pretension can be adjusted in real time for the bearings under different working conditions.

Description

Bearing pretightening force adjusting device

Technical Field

The utility model relates to a bearing, specifically speaking are adjusting device of bearing.

Background

The bearing is an important component in industrial equipment and is generally applied to the industrial fields of machine tools, aviation, aerospace, ships, mining machinery, oil extraction, fluid transportation and the like. The performance of the bearing is related to the safety, reliability and the like of equipment operation, and is an important aspect of the equipment performance. The improper pretightening force of bearing installation is the common reason that equipment vibrates excessively, and the bearing life is short partially. Meanwhile, the requirements on the pretightening force of the bearing are different due to the fact that the use environment and the running state of each device are different greatly. The pretightening force of the bearing needs to be adjusted, and the use requirement is met.

Disclosure of Invention

An object of the utility model is to provide a bearing pretightning force adjusting device of bearing pretightning force can be adjusted in real time.

The purpose of the utility model is realized like this:

the utility model relates to a bearing pretightning force adjusting device, characterized by: the shaft is arranged in the shell, the bearing, the spring sleeve and the adjusting nut are located between the shaft and the shell, an inner ring of the bearing is matched with the shaft, an outer ring of the bearing is matched with the shell, the spring sleeve is tightly pressed on the side face of an outer ring of the bearing, a spring is arranged in the spring sleeve, the adjusting nut is in threaded fit with the shell, the end portion of the spring extends out of the spring sleeve, and the end face of the adjusting nut is attached to the spring.

The utility model discloses can also include:

1. and the spring sleeve and the shell, and the adjusting nut and the spring sleeve are guided by adopting the seam allowances, so that the spring sleeve and the adjusting nut move along the axial direction when the adjusting nut is rotated.

2. The adjusting nut is rotated to change the compression amount of the spring, so that the bearing pretightening force on the bearing outer ring is changed.

The utility model has the advantages that: the utility model has the characteristics of simple structure, convenient to use, use operating mode are many etc.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The invention will be described in more detail below by way of example with reference to the accompanying drawings:

with reference to fig. 1, the utility model discloses constitute by casing 1, axle 2, bearing 3, spring housing 4, spring 5, adjusting nut 6, bearing seal 7, its relation of connection is: the bearing 3 is arranged in the shell 1, and the inner ring of the bearing 3 is arranged on the shaft 2; the adjusting nut 6 compresses the spring 5 to tightly press the spring sleeve 4 on the outer ring of the bearing 3; the shaft seal 7 is connected to the housing 1. When the pretightening force is adjusted, the shaft seal 7 is detached, the adjusting nut 6 is rotated, and the axial propelling quantity of the adjusting nut 6 rotating for a circle can be obtained according to the thread pitch of the adjusting nut 6; according to the elastic coefficient and the number of the springs 5, the variation of the axial pressure of the spring sleeve 4 can be obtained every time the adjusting nut 6 rotates one circle. And continuously rotating the adjusting nut 6 until the pretightening force reaches the design requirement. Through rotating adjusting nut 6, adjust the amount of compression of spring 5 in spring housing 4, and then change the bearing pretightning force of pressing on the bearing 3 outer ring. And the spring sleeve 4 and the shell 1 as well as the adjusting nut 6 and the spring sleeve 4 are guided by adopting rabbets, so that the spring sleeve 4 and the adjusting nut 6 move along the axial direction when the adjusting nut 6 is rotated. Meanwhile, the springs 5 in the spring sleeves 4 are uniformly arranged, so that the pressure of the springs 5 can be uniformly applied to the outer ring of the bearing 3.

By replacing the spring 5, the axial pretension can be adjusted in real time for the bearing 3 under different working conditions.

Claims

1. The utility model provides a bearing pretightning force adjusting device which characterized by: the shaft is arranged in the shell, the bearing, the spring sleeve and the adjusting nut are located between the shaft and the shell, an inner ring of the bearing is matched with the shaft, an outer ring of the bearing is matched with the shell, the spring sleeve is tightly pressed on the side face of an outer ring of the bearing, a spring is arranged in the spring sleeve, the adjusting nut is in threaded fit with the shell, the end portion of the spring extends out of the spring sleeve, and the end face of the adjusting nut is attached to the spring.

2. The bearing preload adjusting device according to claim 1, wherein: and the spring sleeve and the shell, and the adjusting nut and the spring sleeve are guided by adopting the seam allowances, so that the spring sleeve and the adjusting nut move along the axial direction when the adjusting nut is rotated.

3. A bearing preload adjustment apparatus according to claim 1 or 2, wherein: the adjusting nut is rotated to change the compression amount of the spring, so that the bearing pretightening force on the bearing outer ring is changed.