A ratchet wrench

Abstract

The invention provides a ratchet wrench. The ratchet wrench comprises a body, a ratchet, two braking blocks, two elastic pieces and a reversing piece. The material strength of the braking block is greater than that of the ratchet; in a ratchet wrench pulling operation, if the applied force exceeds the limited and bearable torsion at the meshed part of the ratchet teeth of the ratchet and the teethpart of the braking block to cause tooth breakage, the tooth part of the braking block is instantly meshed and positioned with a good ratchet tooth which is positioned behind the broken tooth and isengaged again, so that the effect of ensuring the operation and personal safety of an operator is achieved.

Description

Technical field [0001] The invention relates to an operator using the ratchet wrench for pulling operation, if an excessive force is applied to exceed the limit and can withstand the torque at the meshing position of the ratchet teeth of the ratchet and the teeth of the detent block, it can ensure Ratchet wrench for operator work and personal safety. Background technique [0002] Conventional ratchet wrench, such as Figure 1 to Figure 5 As shown, it includes: a body 2, a ratchet 3, two detent blocks 4, a reversing member 5, two elastic members 6 and a cover 7; wherein, the body 2 has a head 21 and a handle 22 , The head 21 extends from one end of the handle 22, the head 21 has a first accommodating groove 211 and a communicating second accommodating groove 212, the first accommodating groove 211 and the second accommodating groove 212 are open in the head The first accommodating groove 211 and the second accommodating groove 212 have a connecting portion 213 on the side of the h...

AI Technical Summary

Problems solved by technology

However, during Figure 5 As shown, the operator wants to use the ratchet wrench to cooperate with the sleeve to lock and apply force to the workpiece. If he is subjectively afraid that the applied force is not enough to lock the workpiece, he will often add a handle to the tail end of the handle 22 of the body 2. Connect a sleeve (not shown) to extend the moment arm, causing the applied force to exceed the limited and bearable torsion force at the meshing point A of the ratchet 31 of the ratchet 3 and the tooth portion 41 of the catch block 4, resulting in tooth collapse , because the number of teeth 41 of the stop block 4 is significantly less than that of the ratchet 31 on the ratchet 3, the tooth collapse will occur between the stop block 4 with only a few teeth and the ratchet between the ratchet 3 and the ratchet 3. The teeth 31 mesh with the tooth part 41 of A and the ratchet 31 of the ratchet 3 slips, and even the ratchet 31 surrounded by the ratchet 3 and the joint 32 at one end of the ratchet 3 are broken, so that When the force is applied, the fulcrum of the top is lost instantly, causing the ratchet 3 to slip suddenly from the original meshing point A and even idling, which seriously affects the operation and personal safety of the operator.

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