Variable force arm ratchet wrench

By adding protective sleeves and designing variable force arms outside the hexagon sleeve of the ratchet wrench, the problems of wear and length fixation of traditional ratchet wrench are solved, achieving greater durability and flexibility in use.

CN222680774UActive Publication Date: 2025-03-28LINGAN OUMA TOOLS CO LTD
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Patent Information

Application Number
CN202421162128.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-27
Publication Date
2025-03-28
Estimated Expiration
2034-05-27

AI Technical Summary

Technical Problem

During use, traditional ratchet wrench is prone to wear of the ratchet structure and nut contact assembly, resulting in a poor bite and affecting use; its length is fixed and cannot meet the length requirements of different usage scenarios, especially inconvenient use in narrow spaces.

Method used

A variable force arm ratchet wrench is designed. By adding a protective sleeve structure outside the hexagon sleeve to avoid direct contact between the hexagon sleeve and the nut. The design of the extension force arm allows the extension of the force arm to be achieved through the cooperation of the extension rod and the threaded rod when needed.

Benefits of technology

It effectively avoids wear of the hexagonal sleeve and extends the service life of the tool; at the same time, through the design of variable force arm, it is more convenient to use.

✦ Generated by Eureka AI based on patent content.
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Abstract

The ratchet wrench comprises a first handle and a second handle, one end of the first handle is fixedly connected with a ratchet head, the inside of the ratchet head is connected with a hexagonal sleeve through a ratchet wheel, the top and the bottom of the hexagonal sleeve are fixedly connected with inserting rods, and a cover plate is arranged outside the ratchet head. A protective sleeve is arranged on the side face of the cover plate, the protective sleeve is attached to the outer portion of the hexagonal sleeve, the side face of the cover plate is fixedly connected with a lantern ring, and the inserting rod is inserted into the lantern ring. According to the ratchet wrench with the variable force arm, the protective sleeve structure is additionally arranged outside the hexagonal sleeve, in the process of using the ratchet wrench, direct contact between the internal hexagonal sleeve and a nut is avoided, only the protective sleeve is abraded along with the increase of the service time, the hexagonal sleeve is not affected, and the ratchet wrench is convenient to use. Therefore, the protective sleeve can be directly replaced when the ratchet wrench is abraded, and normal use of the ratchet wrench cannot be affected by abrasion of the hexagonal sleeve.
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