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Method for adjusting pre-tightening force of angular contact bearing of indexing mechanism of positioning and orientating system

An angular contact bearing and preload adjustment technology, which is applied in the field of machinery, can solve problems such as inability to ensure consistent rotation resistance of the positioning and orientation system frame, unstable product quality, and damage to angular contact bearings, achieving low cost, eliminating manufacturing errors and , the effect of reducing the probability of damage

Active Publication Date: 2019-06-28
HUBEI SANJIANG AEROSPACE WANFENG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the bearing preload of each angular contact bearing is not adjusted uniformly, the rotation resistance of each positioning and orientation system frame cannot be guaranteed to be consistent, which will lead to unstable product quality and damage to the angular contact bearing

Method used

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  • Method for adjusting pre-tightening force of angular contact bearing of indexing mechanism of positioning and orientating system
  • Method for adjusting pre-tightening force of angular contact bearing of indexing mechanism of positioning and orientating system
  • Method for adjusting pre-tightening force of angular contact bearing of indexing mechanism of positioning and orientating system

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Experimental program
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Effect test

Embodiment 1

[0046] This embodiment provides a positioning and orientation system indexing mechanism angular contact bearing preload adjustment method, the positioning and orientation system indexing mechanism includes an outer frame 1 and an inner frame 2, the outer frame 1 and the inner frame 2 The angular contact bearing 3 and the rotating shaft 4 are flexibly connected between them, and a bearing end cover 5 is press-fitted on the outer frame 1 corresponding to the position of the angular contact bearing 3. The method for adjusting the preload of the angular contact bearing includes the following steps:

[0047] 1) Using a digital display depth micrometer to measure the height difference between the inner and outer rings at more than 3 different positions of the angular contact bearing 3 and taking the average value to obtain h;

[0048]2) Using a digital display depth micrometer to measure the depth from the end surface of the outer ring of the angular contact bearing 3 to the mounting...

Embodiment 2

[0058] This embodiment provides a method for adjusting the pretightening force of the angular contact bearing 3 whose model is 7012C-2RS. The design reference value of the rotational static friction force M of the angular contact bearing 3 is 260g. In this embodiment, there are two angular contact bearings 3, and the preload adjustment method of the two angular contact bearings 3 is the same, and only the preload adjustment method of one angular contact bearing 3 is specifically described here. The indexing mechanism of the positioning and orientation system includes an outer frame 1 and an inner frame 2, the outer frame 1 and the inner frame 2 are flexibly connected through the angular contact bearing 3 and the rotating shaft 4, and the outer frame 1 corresponds to the The position of the angular contact bearing 3 is press-fitted with a bearing end cover 5, and the method for adjusting the pretightening force of the angular contact bearing comprises the following steps:

[00...

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Abstract

The invention discloses a method for adjusting the pre-tightening force of an angular contact bearing of an indexing mechanism of a positioning and orientating system. The method comprises the following steps: step one, measuring a height difference h between inner and outer rings of an angular contact bearing; step two, measuring a depth L1 from the outer ring end face of the angular contact bearing to the mounting surface of the outer frame; (3), measuring a height difference L2 between a step pressing surface and a mounting end surface of a bearing end cover before assembling; (4), carryingout match grinding of the step pressing surface of the bearing end cover before assembling with a set match grinding value; (5), making an annular aluminum foil pad with the thickness of 0.01mm underthe conditions of enabling the outer diameter of the annular aluminum foil pad to be smaller than the outer diameter of the outer ring of the angular contact bearing and the inner diameter of the annular aluminum foil pad to be larger than the inner diameter of the inner ring of the angular contact bearing; and (6), mounting at least one annular aluminum foil pad on the end surface of the angularcontact bearing and compressing the bearing end cover after match grinding on the annular aluminum foil pad to realize contact between the mounting end face of the bearing end cover and the outer frame. The method is suitable for a positioning and orientating system.

Description

technical field [0001] The invention relates to the field of machinery, in particular to a method for adjusting the pretightening force of an angular contact bearing of an indexing mechanism of a positioning and orientation system. Background technique [0002] At present, the frame of the conventional positioning and orientation system usually realizes three-dimensional or two-dimensional plane motion through the rotating shaft between three frames or two frames and its precision bearings (angular contact bearings). Special shape, compact structure, small size, high shape and dimensional stability requirements. [0003] Specifically, angular contact bearings are generally used in pairs, and there is no need for bearing preload adjustment testing. However, due to the compact structure of the positioning and orientation system, the angular contact bearings used are used on one side, so after the assembly is completed, technicians need to adjust the bearing preload of each an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/18G01B5/06
Inventor 万洋李凯波陈清海吕振宇马柯王宗杰郑灵玲
Owner HUBEI SANJIANG AEROSPACE WANFENG TECH DEV
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