Front-mounted snap action vise

Abstract

The invention discloses a front-type quick-action bench vise, which comprises a fixed pliers body, a movable pliers body, a screw rod and a quick-action structure arranged at the front end of the fixed pliers body. The quick-action structure further includes a screw nut, a spring, a thread sleeve, connecting plate and side handle assembly; a screw nut engaged with the screw rod is set in the screw nut groove; a spring is set on the screw nut handle, and the threaded sleeve screwed into the screw hole locks the position ; The lower end of the screw nut is inserted into the central hole on the threaded sleeve, and forms an eccentric connection with the side handle through the connecting plate. Rotate the side handle, through the up and down movement of the screw nut, the engagement or disengagement of the screw nut and the screw rod can be realized, so as to realize slow motion and fast motion; when the screw rod and the screw nut are in the threaded state, rapid advancement can also be realized. The invention has the advantages of simple structure, good manufacturability, low manufacturing cost, many types and wide ranges of workpieces clamped by the jaws, large clamping force, more firm and reliable clamping, more convenient operation and use, and the like.

Description

technical field [0001] The invention relates to the technical field of fitter tools, in particular to a front-mounted quick-action bench vise. Background technique [0002] The quick-action bench vise is a fast clamping tool for fitters, which is mainly used for clamping and fixing workpieces during machining by fitters. [0003] The existing quick-action bench vise is equipped with a quick-action structure in the middle of the fixed pliers body. The basic principle of the quick-action structure is based on the separation of the screw rod and the screw nut. There are roughly two forms: [0004] (1) The first fast-acting structure is to design the screw nut as an eccentric wheel structure. One side of the center hole of the eccentric nut has threads and the other side has no threads. Take the right-handed thread as an example: when the screw is rotated clockwise, Depending on the friction force or the action of the key, the screw rod drives the eccentric nut to rotate, and t...

AI Technical Summary

Problems solved by technology

Its shortcomings are as follows: First, when the screw rod is rotated counterclockwise, there is no slow-motion function

The second is that if the eccentric wheel is driven by friction to rotate, the meshing between the screw mandrel and the screw nut cannot be effectively realized, and sometimes it is easy to have defects that cannot be meshed; if the eccentric wheel is driven by the key to rotate, it will affect the strength of the screw mandrel

Third, when the eccentric nut is driven by friction, if the lubrication is good, the friction is small and the slow-motion conversion is unreliable; if the friction is large, the lubrication is poor and the wear is intensified

Its shortcomings are: complex structure, poor manufacturability, high manufacturing cost

[0006] (3) The common deficiency of the above two quick-action structures is that they cannot achieve rapid advancement when the nut and the thread of the screw are normally engaged.

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