Six-claw double-linkage self-centering chuck

Abstract

The invention discloses a six-claw double-linkage self-centering chuck. The chuck comprises a transmission assembly installed between a front end cover and a back end cover, wherein the transmission assembly is formed in a way that a floating lever rod is hinged with a first sliding block and a second sliding block; one end of the first sliding block is a cylindrical pin, the other end of the first sliding block is a rectangular sliding block, the lower end of the second sliding block is an oblique T-shaped boss, the rectangular sliding block of the first sliding block is embedded in straight groove behind bottom claws to be meshed with the bottom claw, the oblique T-shaped boss at the lower end of the second sliding block is embedded in three oblique T-shaped grooves uniformly distributed in a round wedge in the circumferential direction to be meshed with the round wedge, and simultaneously an upper rectangular end is embedded in three radial straight grooves of the back end cover to be matched with the back end cover; the round wedge is assembled in the inner hole of the back end cover to slide freely in the axial direction; and the six bottom claws are respectively inserted in six radial T-shaped grooves uniformly distributed in the circumferential direction of the front end cover, and are subject to mesh type transmission by the transmission assembly. The chuck can realize favorable centering and clamping effects on rotational parts, and can effectively reduce the chucking deformation of low-rigidity thin-wall parts, thereby playing active roles in promoting and implementing process standardization.

Description

technical field [0001] The invention relates to a centering device for a rotary part on a metal cutting machine tool, in particular to a six-claw two-linkage self-centering chuck. Background technique [0002] The concrete structure of existing centering chuck roughly has the following several kinds at present: [0003] 1. Three-jaw self-centering chuck [0004] Three-jaw self-centering chucks are roughly divided into several structural types according to their transmission methods: wire type, wedge type, lever type, and helical tooth type. The working principle is simple and reliable, and they all use various transmission methods to realize three-jaw The synchronous centripetal movement of the claw body realizes the centering clamping of the parts. Its main disadvantage is that the three-point contact area between the claw body and the parts is small and scattered, resulting in uneven force on the parts and large radial deformation. Although the workpiece deformation prob...

AI Technical Summary

Problems solved by technology

[0004] Three-jaw self-centering chucks are roughly divided into several structural types according to their transmission methods: wire type, wedge type, lever type, and helical tooth type. The working principle is simple and reliable, and they all use various transmission methods to realize three-jaw The synchronous centripetal movement, and then realize the centering clamping of the parts, its main disadvantage is that the three-point contact area between the claw body and the parts is small and scattered, resulting in uneven force on the parts and large radial deformation

Two-two floating of the six jaws can not only completely position but also ensure reliable contact between each jaw and the workpiece, but its system and internal structure are relatively complicated.

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