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
CN109945767BActive Publication Date: 2021-01-26HUBEI SANJIANG AEROSPACE WANFENG TECH DEV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUBEI SANJIANG AEROSPACE WANFENG TECH DEV
Publication Date
2021-01-26

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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.
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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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