Power-off resistance maintaining circuit of rope strength training apparatus

By using electromagnetic switches and normally closed contacts to form a short-circuit loop in the rope strength trainer, the problem of insufficient resistance when the rope strength trainer is powered off is solved, reducing cost and size, improving response speed, and achieving safe power-off protection.

CN224520953UActive Publication Date: 2026-07-17JIANGSU ZHUOZHU INTELLIGENT MFG CO LTD
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Patent Information

Application Number
CN202521614133.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-31
Publication Date
2026-07-17
Estimated Expiration
2035-07-31

AI Technical Summary

Technical Problem

Existing rope strength training devices cause users to fall when the motor rotor loses resistance during power outages. Furthermore, existing mechanical electromagnetic friction plate resistance braking devices are expensive, have slow response speeds, large installation volume, high installation precision requirements, high power consumption, and generate significant heat.

Method used

An electromagnetic switch is used instead of a mechanical electromagnetic friction plate resistance brake device. The electromagnetic switch is connected to a power converter. When the power is off, the normally closed contact forms a short circuit loop to generate electromagnetic force to provide resistance and prevent the user from falling.

Benefits of technology

It reduces costs, size, power consumption, and installation accuracy requirements, while improving response speed, overcoming the shortcomings of existing technologies, and ensuring that resistance is still provided during power outages.

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Abstract

The utility model discloses a power-off resistance maintaining circuit of a rope strength training apparatus, and relates to the technical field of fitness equipment, and the power-off resistance maintaining circuit comprises a power supply converter and at least one electromagnetic switch, and the input end of the power supply converter is connected with an input power supply module of the rope strength training apparatus; the output end of the power converter is connected with two ends of a coil of the electromagnetic switch; the electromagnetic switch comprises at least one group of normally closed contacts, and the at least one group of normally closed contacts is connected between at least two of a first motor wire, a second motor wire and a third motor wire of a three-phase permanent magnet motor of the rope strength training apparatus; the first motor wire is connected with any one of U, V and W phases of the input alternating current, and the second motor wire and the third motor wire are correspondingly connected with the rest two phases of the input alternating current; the power-off resistance maintenance response speed is increased while the power-off resistance maintenance cost, the installation size, the installation precision requirement, the power consumption and the heat productivity of the rope strength training instrument are reduced.
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