Hydraulic rapid automatic centering chuck

Abstract

The invention discloses a hydraulic rapid automatic centering chuck which is suitable for processing machines such as machine tools and the like. The chuck comprises a clamping jaw assembly, a chuck body, a connector and a ball-screw hydraulic drive mechanism, wherein the clamping jaw assembly is provided with three or four jaws, the connector and the ball-screw hydraulic drive mechanism are arranged in the chuck body, the ball-screw hydraulic drive mechanism comprises a multi-head ball-screw assembly, a hydraulic oil cylinder and a hydraulic converter, the multi-head ball-screw assembly is composed of a multi-head lead screw and a ball nut, the hydraulic converter is connected with a hydraulic system, the multi-head all-screw assembly and the hydraulic oil cylinder are arranged in a spindle hole of a machine tool, and the hydraulic converter is communicated with the hydraulic oil cylinder. Hydraulic oil flows into the hydraulic oil cylinder through the hydraulic converter, so that a cylinder body of the hydraulic oil cylinder makes a forward-and-backward motion, and then pushes the ball nut to make a forward-and-backward motion and drives the multi-head lead screw to make a forward or backward rotating motion, the multi-head lead screw after extending to the inside of the chuck body is connected with the connector so as to drive the connector to operate, and the connector drives the clamping jaws to move radially to and fro through an Archimedes planar spiral disc.

Description

technical field

[0001] The invention relates to a hydraulic automatic centering chuck, which is suitable for processing machines such as machine tools. Background technique

[0002] Most of the collets used on existing machine tools are elastic collets, and the stroke of the jaws is very small. One kind of jaws can only adapt to parts of one specification, and in the process of processing, due to the hydraulic (or pneumatic) , hydraulic (or pneumatic) components are prone to wear and leakage, and the service life is short. There are also electric chucks using Archimedes spiral discs, which are equipped with mechanical transmission mechanisms such as reducers and clutches, with complex structures and poor stability. Contents of the invention

[0003] The technical problem to be solved by the present invention is to provide a hydraulic rapid self-centering collet, which can realize self-centering, has a large adjustment range of jaws, and has a long service life.

[0004] ...

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