Elastic coupling without axial clearance

By designing a flexible coupling with no axial clearance, and adopting an integrally molded body and shape memory alloy wire structure, the problem of axial clearance in the coupling is solved, improving service life and product yield, and reducing production costs.

CN224550661UActive Publication Date: 2026-07-24DONGGUAN FANYU AUTOMATION TECH CO LTD
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Patent Information

Application Number
CN202521596213.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-29
Publication Date
2026-07-24
Estimated Expiration
2035-07-29

AI Technical Summary

Technical Problem

Existing couplings are prone to developing clearance in the axial direction, which leads to deviations in the length tolerance during tool machining, increases the defect rate and replacement frequency, and affects service life and production costs.

Method used

Design a flexible coupling with zero axial clearance, which adopts an integrally molded body and a detachable fixed block. The body contains shape memory alloy wire, which is fixed by fasteners. The coupling body has a spiral groove to compensate for radial runout, and the fixed block has a fixed length shape memory alloy wire to correct axial displacement.

Benefits of technology

It effectively eliminates axial clearance, extends the service life of couplings, reduces replacement frequency, improves product yield, reduces production costs, and ensures high precision and reliability.

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Abstract

The utility model provides an elastic coupling without axial clearance, which comprises an integrally formed main body, the axial clearance can be reduced, a spiral line groove is arranged on the coupling, the torque can be ensured, the radial 360-degree deflection compensation can be provided, a shaft hole is arranged in the main body, two fixing blocks which are detachably connected are arranged in the shaft hole, and the axial clearance can be reduced through the spiral line groove. Each fixing block is provided with a cutting groove in the axial direction, a memory alloy wire with the fixed length is jointly connected between the cutting grooves of the two fixing blocks, the memory alloy wires abut against the peripheral walls of the fixing blocks through fasteners, the two sides of the cutting grooves are squeezed mutually to be meshed and fixed, and under the action of the memory alloy wires, the cutting grooves can be fixed to the peripheral walls of the fixing blocks. According to the utility model, the coupling main body with elastic deformation can be corrected, so that the two ends of the coupling main body are in a centering state, the service life of the coupling main body is greatly prolonged, the replacement frequency is reduced, the cost is reduced, the yield of produced products can be further improved, and the use accuracy of the coupling is higher and the coupling is more reliable.
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