Fatigue experiment device for bolt torsion

By designing a bolt torque fatigue testing device with a box body, box cover, limiting strip, and temperature control structure, the safety and adaptability issues of existing devices were solved. This device enables shielding and splash prevention for bolts of different sizes and temperature environment regulation, thereby improving the safety and accuracy of the experiment.

CN224034913UActive Publication Date: 2026-03-24HENAN HEPAI FASTENER MFG CO LTD
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Patent Information

Application Number
CN202520756871.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-21
Publication Date
2026-03-24
Estimated Expiration
2035-04-21

AI Technical Summary

Technical Problem

Existing bolt torsional fatigue testing equipment is not convenient for shielding and preventing splashing of bolts during torsional fatigue testing, resulting in limited safety. It is also inconvenient for conducting torsional fatigue tests on bolts of different sizes and for placing bolts in different temperature environments during torsional fatigue testing.

Method used

An experimental device was designed, comprising a box body, a box cover, a limiting strip, an upper clamp, a lower clamp, and a temperature control and adjustment structure. The limiting strip and the box cover work together to prevent splashing. Clamps and clamps of different sizes are set to accommodate bolts of different sizes. Temperature sensors, heating tubes, and liquid nitrogen tanks are used to adjust the temperature environment.

Benefits of technology

It achieves safe shielding and splash prevention for bolts in torsional fatigue tests, can adapt to the experimental requirements of bolts of different sizes, and can conduct experiments in different temperature environments, thus improving the safety and accuracy of the experiments.

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Abstract

The utility model discloses a fatigue test device for bolt torsion. The fatigue test device comprises a box body, fixed blocks symmetrically fixed on the inner sides of the upper and lower ends of the box body, and a coaming fixedly connected with the right side of the front end of the box body, an upper clamp and a lower clamp which are attached to the fixing blocks are arranged on the inner sides of the upper end and the lower end of the box body respectively, bolts composed of screws and nuts are arranged in the upper clamp and the lower clamp, and temperature control adjusting structures are arranged outside the screws. A box cover is rotationally connected to the inner side of the rear end of the box body, a sealing gasket tightly attached to the box body is fixedly attached to the outer side of the box cover, and a limiting strip rotationally connected with the box body in a damping mode is attached to the rear side of the upper right end of the box cover. According to the fatigue experiment device for the bolt torsion, the bolt in a torsion fatigue experiment can be conveniently shielded and prevented from splashing, so that the safety is high, the bolts with different sizes can be conveniently subjected to the torsion fatigue experiment, and the bolts in the torsion fatigue experiment can be conveniently positioned in different temperature environments.
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