A torque protection safety chuck wrench

Abstract

The invention discloses a torque protection safety chuck spanner so as to solve the problems that a spring of an existing safety chuck spanner influences normal use of a chuck head easily, and falling of the spring is unfavorable for work of a machine tool. The torque protection safety chuck spanner comprises a main spanner shaft, a tool-post spanner, an automatic popping protection mechanism, an adjustable torque protection mechanism, a bi-directional ratchet wheel reversing mechanism and a three-position self-locking mechanism. The tool-post spanner is fixed to the top of the main spanner shaft. The automatic popping protection mechanism comprises an ejector rod spring and an ejector rod. The adjustable torque protection mechanism comprises a pressing block, a Belleville spring, a force protection shaft sleeve, steel balls and a clamping sleeve case. The bi-directional ratchet wheel reversing mechanism comprises a cushion block, a ratchet wheel, pawls, a pawl locating block, an upper steel plate, a supporting plate and a lower steel plate. The three-position self-locking mechanism comprises a handle, a pressing spring and a gasket. The clamping force of a three-pawl chuck can be accurately controlled, and the torque protection safety chuck spanner is capable of being used as a three-pawl chuck spanner and the tool-post spanner, simple, easy to use and good in safety.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, and relates to a clamp, in particular to a torque protection safety chuck wrench. Background technique [0002] Currently on the market, improved chuck wrenches based on safety issues, such as the safety chuck wrench disclosed in Chinese Patent Application No. 91219170.8, include a wrench body, a wrench handle, and a spring, which is sheathed on the wrench body. After the operator uses the three-jaw chuck wrench, under the action of spring force, the wrench body will automatically pop out from the square hole on the outer circumference of the three-jaw chuck. However, the above-mentioned spring is arranged at the chuck head end of the chuck body, which easily affects the normal use of the chuck head, and when the spring falls off, it is likely to be unfavorable to the operation of the machine tool. Just because of this shortcoming of the inconvenient operation of this safety chuck wrench,...

AI Technical Summary

Problems solved by technology

Aiming at the three-jaw chuck wrench used on ordinary lathes, a multi-functional, easy-to-operate and safe three-jaw chuck wrench is developed, which has poor operation safety and poor clamping force control for the operator when using the three-jaw chuck to load and unload workpieces would be a good solution to the problem

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