Ratchet wrench and its ratchet wrench head

Abstract

The invention relates to a ratchet wrench and discloses the ratchet wrench and a ratchet wrench head. The ratchet wrench comprises a ratchet base (1) and a ratchet (2). A through hole (11) used for installing the ratchet (2) is formed in the middle of the ratchet base (1); the front end and the rear end of the wall of the through hole (11) are separately provided with a front annular concave shoulder (111) and a rear annular concave shoulder (112); the bottom faces of the front annular concave shoulder (111) and the rear annular concave shoulder (112) separately form a front stepped face (131) and a rear stepped face (132); the outer surface of the ratchet (2) is provided with two snap ring grooves (22) which are internally provided with two snap rings (4); and the two snap rings (4) are separately located in the front annular concave shoulder (111) and the rear annular concave shoulder (112). According to the ratchet wrench and the ratchet wrench head, by adopting the two snap rings (4) and the stepped faces (131) matched with the two snap rings (4), limit to the ratchet (2) can be effectively achieved, an installation person can install the ratchet wrench head conveniently, and the assembly efficiency of the installation person is improved.

Description

technical field [0001] The invention relates to a ratchet wrench, in particular to a ratchet wrench head. Background technique [0002] Ratchet wrench is a manual screw tightening tool, which allows users to assist in fastening and loosening bolts or nuts. The conventional ratchet wrench mostly uses a single snap ring to lock the ratchet, which makes the ratchet wrench slip and fall off after a long time of use by the user, which not only increases the processing difficulty of the processing personnel, but also improves the installation process. It is difficult for personnel to install the ratchet wrench; and there is no effective protection for the toggle button and the tooth block, and it is easy for foreign objects to enter between the ratchet wheel and the tooth block, thereby increasing the tooth profile wear of the locking teeth or external teeth , affecting the service life of the ratchet wrench. [0003] For example, the published application number "201620110999.X...

AI Technical Summary

Problems solved by technology

The conventional ratchet wrench mostly uses a single snap ring to lock the ratchet, which makes the ratchet wrench slip and fall off after a long time of use by the user, which not only increases the processing difficulty of the processing personnel, but also improves the installation process. It is difficult for personnel to install the ratchet wrench; and there is no effective protection for the toggle button and the tooth block, and it is easy for foreign objects to enter between the ratchet wheel and the tooth block, thereby increasing the tooth profile wear of the locking teeth or external teeth , affecting the service life of the ratchet wrench

[0003] For example, the published application number "201620110999.X", the patent name "a kind of universal socket ratchet wrench" in its embodiment describes that the ratchet is fixed by a single snap ring, and the outer side of the ratchet is not provided with a protective pressure plate, and it is also required Milling the holes not only increases the processing requirements of the processing personnel, but also increases the difficulty for the installers to install the ratchet wrench. The ratchet or pawl is worn out, which affects the user's service life of the ratchet wrench

[0004] Published application number "201620021710.7", patent name "bias assembly of ratchet wrench", in its implementation, it only describes a single fastener to fix the ratchet, and install the ratchet, wire changer, first claw and second claw In the hollow head of the main body, this installation method also requires the processing personnel to carry out milling processing, which increases the difficulty for the installation personnel to install the ratchet wrench, increases the installation time of the installation personnel, and between the ratchet and the first claw, the second There is no protective plate on the outside of the claws to isolate dust or foreign objects from the outside, which increases the wear speed of the first claw, the second claw and the ratchet, and reduces the service life of the ratchet wrench

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