Mechanical comparator for bearing testing

By designing a mechanical comparator, the problem of accurate measurement of axial preload in bearing testing has been solved, achieving high-precision and low-cost bearing testing. It is applicable to a variety of bearing models and meets the needs of mass production.

CN224623670UActive Publication Date: 2026-08-11苏州格源数控科技有限公司
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Patent Information

Application Number
CN202521938868.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-09-10
Publication Date
2026-08-11
Estimated Expiration
2035-09-10

AI Technical Summary

Technical Problem

Existing bearing testing equipment struggles to achieve accurate measurements under axial preload conditions. Traditional equipment has poor adaptability, cannot meet diverse testing needs, and is susceptible to errors caused by manual operation.

Method used

A mechanical comparator was designed, which adopts a detachable structure and precision fit. By controlling the coaxiality of the first positioning block, the second positioning block and the measuring ring, combined with a dial indicator and a disc spring preload device, the accurate axial preload and radial deformation measurement of the bearing can be realized.

Benefits of technology

It achieves precision and consistency in bearing inspection, with errors controlled within 0.003mm. It is highly adaptable, suitable for mass production, reduces human error, and improves inspection efficiency.

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Abstract

This utility model relates to a mechanical comparator suitable for bearing testing, comprising a housing, a first positioning block fixedly mounted on the top of the housing by a first bolt and a second bolt, and a base plate fixedly connected to the bottom of the housing; an adjusting block fixedly mounted inside the housing, the adjusting block being connected to a first guide post, the first guide post being fitted with a first guide sleeve; the adjusting block being connected to a second guide post, the second guide post being fitted with a second guide sleeve; a fixing block being mounted on the upper end of the first and second guide posts; and a second positioning block being connected to the fixing block; the inner diameters of both the first and second positioning blocks are matched to the bearing assembly to be tested; an adjustment device is mounted on the base plate for adjusting the gap between the fixing block and the adjusting block. Thus, the inner holes of the first and second positioning blocks precisely match the outer ring of the bearing to be tested, and with the coaxiality control of the mandrel and measuring ring, the bearing is ensured to be subjected to uniform force, avoiding subjective errors caused by reliance on worker experience in traditional dial indicator testing.
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