Wave spring for bearing pre-tightening and wave washer thereof

By designing waveform washers with four sine waves of varying widths and wave numbers, and a composite structure, the problem of fatigue fracture and wear of waveform springs in new energy vehicle drive motors was solved, achieving higher stability and bearing life.

CN223662432UActive Publication Date: 2025-12-12ZHENJIANG CHENLIN MASCH CO LTD
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Patent Information

Application Number
CN202423079092.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-13
Publication Date
2025-12-12
Estimated Expiration
2034-12-13

AI Technical Summary

Technical Problem

The wave springs under the existing JB/T 7590-2005 technical conditions are prone to fatigue fracture in the drive motors of new energy vehicles due to high stress and frequent vibration. In addition, the small contact area between the wave crest and the outer ring of the bearing leads to severe wear and affects the bearing life.

Method used

The system employs a wave washer with four wave lengths and a sinusoidal shape, combined with a top washer, bottom washer, slot, slide, insert shaft, and rubber ring. Stability and friction are enhanced by the deformation of the rubber sheet and rubber washer. The rubber ring adapts to the bearing shape, and a limit indicator is set to speed up the assembly.

Benefits of technology

It improves the fatigue life and stability of wave springs, reduces wear, extends the service life of bearings, and enhances their performance in harsh environments.

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Abstract

The utility model discloses a wave spring for pre-tightening a bearing, which comprises a top gasket, the bottom of the top gasket is fixedly connected with a wave spring elastic sheet mechanism, the bottom of the wave spring elastic sheet mechanism is fixedly connected with a bottom gasket, the top of the top gasket is provided with a plurality of groups of slots, and inserting shafts are arranged right below the slots. The wave spring with four waves has small working stress, the fatigue life of the wave spring is prolonged, the problem of fatigue fracture of the wave spring in a severe application scene is avoided, the ring width of the wave washer is set to be of a narrow ring structure, the ring width of the wave washer is smaller than that of the wave spring under the technical condition of JB / T 7590-2005, and the service life of the wave spring is prolonged. Therefore, the wave crest of the wave washer can be in large-area contact with the bearing outer ring, and after the wave washer is pressed by axial force, the wave crest of the wave washer is still in large-area contact with the end face of the bearing outer ring, so that the contact stress is reduced, the problem that the contact part is greatly abraded is solved, and meanwhile, the service life of the bearing is also prolonged.
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