Disc-type elastic chuck assembly for clamping small workpiece

Abstract

The invention relates to a disc-type elastic chuck assembly for clamping a small workpiece. The assembly comprises a chuck and a locking nut, wherein the chuck comprises a disc-type base, a plurality of elastic clamping jaws arranged on the disc-type base and elastic connecting sections for connecting all the elastic clamping jaws and the disc-type base, the elastic connecting sections are arranged between the elastic clamping jaws and the disc-type base, the locking nut is in threaded connection with the disc-type base, an inner end face of the locking nut is attached to a corresponding outer end face of each elastic clamping jaw, the inner end face and the outer end faces are flat, and the locking nut is driven by external force to move in an axial direction of the disc-type base, so that the elastic connecting sections elastically contract under extrusion force of the inner end face, the elastic connecting sections are used for driving the elastic clamping jaws to clamp the small workpiece, elastic deformation of the elastic connecting sections is used for driving the elastic clamping jaws to move in a radial direction of the disc-type base to achieve contraction and gathering so as to generate clamping force, the disc-type base and the disc-type locking nut are used, axial sizes of the elastic clamping jaws can be reduced, and the assembly adapts to clamping of the small workpiece.

Description

technical field [0001] The invention relates to the field of workpiece clamping equipment, in particular to a disc-type elastic chuck assembly for clamping small workpieces. Background technique [0002] Spring collets are common and commonly used unit components in mechanical mechanisms. The traditional spring collet we use uses an inner and outer cone structure to realize the locking function. Usually the lock nut adopts the inner cone, and the elastic head adopts the outer cone. When locking is required, let the inner cone of the lock nut move axially relative to the outer cone of the elastic head, and use the inner cone of the lock nut to draw in the jaws to clamp the workpiece. [0003] A typical traditional collet is used in the prior art. The collet is mainly composed of an elastic head with claws and a lock nut. The elastic head and the lock nut are connected by threads. The inner cone of the lock nut and the elastic The outer cone of the claw is engaged, when the...

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Problems solved by technology

[0003] A typical traditional collet is used in the prior art. The collet is mainly composed of an elastic head with claws and a lock nut. The elastic head and the lock nut are connected by threads. The inner cone of the lock nut and the elastic The outer cone of the claw is engaged, when the lock nut is tightened clockwise, the lock nut approaches the fixed end of the left end of the elastic head, and the inner cone of the lock nut forces the elastic claw to tighten toward the center to achieve tightening of the workpiece , when the lock nut is rotated counterclockwise, the claws will be released. In order to ensure the elasticity of the collet and the necessary tightening range, the elastic movable part must have sufficient length, otherwise it will cause difficulty in locking, insufficient clamping force and the claws After tightening, there are a series of problems such as plastic deformation and inability to rebound. Therefore, the axial length of the traditional spring collet is relatively large, and the spring collet that is too short performs poorly in terms of performance and use. Therefore, the spring of the traditional structure The axial space of the collet occupies a large space. Faced with the miniaturization and integration of mechanical products, it is the development direction. The requirements for the small axial space of the spring collet cannot be met, especially the requirements for the ultra-short axial dimension. The traditional spring Collets are no longer suitable

[0004] Therefore, the inventor provides a disc-type collet assembly for clamping small workpieces, which overcomes the problem that the collets in the prior art cannot be adapted to clamp small workpieces

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