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A method for adjusting the pretightening force of an angular contact bearing of an indexing mechanism in a positioning orienting system

An angular contact bearing and pre-tightening force adjustment technology, applied in the field of machinery, can solve the problems such as the inability to guarantee the consistent rotation resistance of the positioning and orientation system frame, unstable product quality, damage to the angular contact bearing, etc., achieving low cost, eliminating manufacturing errors and , the effect of reducing the probability of damage

Active Publication Date: 2021-01-26
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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  • A method for adjusting the pretightening force of an angular contact bearing of an indexing mechanism in a positioning orienting system
  • A method for adjusting the pretightening force of an angular contact bearing of an indexing mechanism in a positioning orienting system
  • A method for adjusting the pretightening force of an angular contact bearing of an indexing mechanism in a positioning orienting system

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Experimental program
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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) Measure the depth from the end surface of the outer ring of the angular contact bearing 3 to the mounting surface 1a at more than 3 different posit...

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 pretightening force of an angular contact bearing of an indexing mechanism of a positioning and orientation system, which comprises the following steps: (1) measuring the height difference h of the inner and outer rings of the angular contact bearing; Depth L1 to the mounting surface of the outer frame; (3) Measure the height difference L2 between the step press-fit surface of the bearing end cover before assembly and the installation end surface; (4) The step press-fit of the bearing end cover before assembly (5) Make a ring-shaped aluminum foil pad with a thickness of 0.01mm. The outer diameter of the ring-shaped aluminum foil pad is smaller than the outer diameter of the outer ring of the angular contact bearing, and the inner diameter of the ring-shaped aluminum foil pad is larger than that of the inner ring of the angular contact bearing. (6) Install at least one ring-shaped aluminum foil pad on the end face of the angular contact bearing, and press the ring-shaped aluminum foil pad with the ground bearing end cover. At this time, the installation end face of the bearing end cover and the outer frame are installed face fit. Suitable for positioning and orientation systems.

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 Patents(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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