Bearing contact angle measuring instrument

Abstract

The invention relates to a bearing contact angle measuring instrument, which is mainly composed of a loading mechanism, a positioning driving mechanism and a measurement control part. The load is applied to the inner ring of the tested bearing through the loading mechanism, the outer ring of the tested bearing is directly driven by the positioning drive mechanism, the rotation speed of the outer ring is controlled by the industrial computer, and the rotation speed of the cage is measured by the laser displacement sensor. The relationship between the outer ring speed, the cage speed and the bearing contact angle is used to calculate the size of the bearing contact angle. The invention can accurately measure the size of the bearing contact angle, has simple structure, convenient operation, high reliability and high repeatability, and is an automatic bearing contact angle measuring instrument.

Description

technical field [0001] The invention relates to a bearing contact angle measuring instrument, which belongs to the technical field of bearings. Background technique [0002] Bearing contact angle is an important structural parameter of angular contact ball bearings. The contact angle is an important parameter to measure the performance of angular contact bearings. Its value determines the axial and radial load carrying capacity of the bearing. A large number of theoretical studies and experiments have proved that for angular contact ball bearings for precision spindles, especially for matching bearings, the size and consistency of the contact angle will directly affect the stiffness, rotation accuracy and service life of the entire shafting. [0003] According to the bearing geometry, the ball bearing contact angle There is the following geometric relationship with the original radial clearance (design clearance): [0004] [0005] In the formula: G r is the original...

AI Technical Summary

Problems solved by technology

[0017] 1. The transmission chain is too long, the transmission stability is not good, the bearing rotation stability is not good, the measurement repeatability is not good, and the bearing under test is easy to be damaged;

[0018] 2. The lever, cam and weight are jointly loaded, the loading force is offset from the center line of the bearing, and the inner and outer rings of the bearing are prone to yaw angle, which affects the measurement accuracy and is easy to damage the bearing under test;

[0019] 3. The light emitted by the photoelectric sensor hits the bearing cage under test too much. The photoelectric sensor can only measure about one rotation of the bearing cage under test, but it is not very accurate. The measurement error is large, and it cannot measure miniature bearings and bearings. Bearings with high precision requirements

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