Speed regulation structure of electric power tool

By setting a sensing structure on the speed control knob of the power tool to contact the gear position contact post, a limit feedback force is generated, which solves the problem of the lack of gear jamming in the stepless speed regulation of traditional power tools, improves the operating experience and reliability, and reduces manufacturing costs.

CN224391049UActive Publication Date: 2026-06-23ZHEJIANG ZHONGJIAN TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHEJIANG ZHONGJIAN TECH CO LTD
Filing Date
2025-05-15
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Traditional power tools with continuously variable speed control lack a noticeable sense of gear shifting, affecting the user experience and accuracy. Furthermore, devices with gear feedback functionality increase manufacturing costs and reduce reliability.

Method used

A sensing structure is set on the speed control knob so that it contacts the gear position contact post during rotation, generating a limit feedback force. Limit sensing is achieved through magnetic induction, elastic deformation sensing of hard materials, or elastic deformation sensing of elastic materials, ensuring that the user can accurately adjust to the preset gear.

Benefits of technology

It achieves stepless speed regulation while providing a noticeable gear shifting feel, improving the accuracy and reliability of the operating experience, and has a simple structure and low cost.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a speed regulating structure of an electric tool, which comprises a shell composed of a first shell and a second shell, a potentiometer arranged in the first shell, and at least two gear touch columns arranged in the second shell, wherein the potentiometer can control the rotating speed of a motor of the electric tool; a speed regulating knob is rotatably arranged on one side of the potentiometer and is provided with a sensing structure on the other side, wherein the sensing structure can be contacted with the gear touch columns by rotating the speed regulating knob; during the rotation of the speed regulating knob, the rotating speed of the motor of the electric tool can be controlled by the potentiometer; when the speed regulating knob is rotated to different preset gears, the sensing structure can contact different gear touch columns and generate a limiting feedback force.
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