Embedded motor training piece capable of directly winding and unwinding rope and used for strength training instrument

By optimizing the rotor core structure of the embedded motor training component, the problems of slow response of the external rotor motor and cogging torque jump of the internal rotor motor were solved, enabling fast, smooth, and quiet rope retrieval and release, thus improving the effectiveness and safety of strength training.

CN224141402UActive Publication Date: 2026-04-21SHANGHAI DADONG TECH CO LTD
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Patent Information

Application Number
CN202520787144.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-23
Publication Date
2026-04-21
Estimated Expiration
2035-04-23

AI Technical Summary

Technical Problem

In existing strength training equipment, the external rotor motor has a slow response and the internal rotor motor has a cogging torque jump problem, which leads to unstable rope retrieval and release, affecting training effect and safety, and also causes a lot of noise.

Method used

By employing an embedded motor training component and optimizing the rotor core structure, including the design of the transition magnetic bridge, the magnetic isolation bridge, and the pole arc segment, the air gap magnetic field is optimized. Combined with the weight reduction hole design, the rotational inertia and noise are reduced, achieving rapid response and smooth operation.

Benefits of technology

It improves the response speed of rope release and retrieval and the smoothness of motor, reduces noise, provides stable tensile force output, and enhances training comfort and safety.

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Abstract

According to the scheme, the embedded motor training piece capable of directly winding and unwinding the rope for the strength training instrument comprises a motor assembly used for providing a resistance source, the motor assembly comprises a stator and a rotor which are matched with each other, a rotor iron core in the rotor is composed of a plurality of punching sheets which are overlapped with each other, and the punching sheets are arranged in the motor assembly. The outer periphery of each punching sheet is provided with a plurality of transition magnetic bridges arranged at equal intervals along the circumferential direction, the inner side of each transition magnetic bridge is provided with a corresponding magnet hole, the plurality of magnet holes are arranged at equal intervals along the circumferential direction of the punching sheet, and the side of each magnet hole forms a magnetic isolation bridge communicated with the magnet hole. Pole arc sections are formed at the connection positions of the adjacent transition magnetic bridges, and the magnets are embedded into the corresponding magnet holes; and the tension assembly comprises a winder fixed on the output shaft of the motor assembly and a rope with one end fixed on the winder, and the operation characteristics of high response speed of winding and unwinding the rope, smooth motor operation, low noise and the like are integrated.
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