CN214978245U

CN214978245U - Pull-down type internal expansion elastic sleeve mandrel

Info

Publication number: CN214978245U
Application number: CN202021496423.4U
Authority: CN
Inventors: 王国良
Original assignee: Baoji Qinfa Puruisheng Machinery Equipment Co ltd
Current assignee: Baoji Qinfa Puruisheng Machinery Equipment Co ltd
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2021-12-03
Anticipated expiration: 2030-07-16

Abstract

A core shaft of a pull-down type internal expansion elastic sleeve can drive the internal expansion elastic sleeve to move axially by rotating a screw in the core shaft body, and the internal expansion elastic sleeve is forced to generate elastic deformation under the action of a conical surface in the core shaft body to clamp a part. When the screw in the mandrel body is rotated reversely, the inner expansion elastic sleeve moves axially and loosens the clamped part under the condition of restoring elastic deformation.

Description

Pull-down type internal expansion elastic sleeve mandrel

Technical Field

The utility model relates to a technological equipment anchor clamps class neighborhood especially relates to axle type gear grinding manufacturing's interior bloated elastic sleeve dabber of drop-down formula.

Background

When a shaft gear is machined on a worm gear grinding machine, a special transition mandrel needs to be matched due to the particularity of a machine tool clamping disc, and a pull-down type inner expansion elastic sleeve mandrel is one mode. The inner expansion type elastic sleeve with the outer cone is axially cut into a plurality of radially equally-divided grooves from the outer end face to the position close to the root of the inner hole, the outer conical surface of the inner expansion type elastic sleeve is combined with the inner conical surface of the core shaft body, the inner expansion type elastic sleeve is driven by axial force through rotation of a screw, and the self-centering of the part is clamped or loosened through elastic deformation of the inner expansion type elastic sleeve.

Disclosure of Invention

The utility model aims to solve the technical problem that after the outer conical surface of the interior elasticity cover that expands and the interior conical surface of core axis body combine, it is tight to expand the elasticity cover in making through screw screwing, and interior elasticity cover that expands is because of the reason of structure, and its fluting mode is one-way, and its cone angle also changes when elastic deformation, makes the tight position of clamp including the contact of the elasticity cover fluting end that expands, and the aperture root makes hole and part contact site length subtract short because of rigidity intensity, contracts inhomogeneously, presss from both sides tight back precision unstability.

The utility model discloses the cone angle that the elasticity cover expanded in when elastic deformation is improved is stable, elasticity volume shrink is even, closely with the part contact.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: and a plurality of U-shaped closed ring grooves are added in the intervals of a plurality of radially equally-divided grooves which are axially cut on the outer end surface of the inner expansion elastic sleeve.

The beneficial effects of the utility model are that the elasticity volume shrink is even, presss from both sides tightly stably, and the precision improves.

Drawings

The invention will be further described with reference to the following figures and examples:

FIG. 1 is a structural diagram of the present invention

In the figure, 1 is a core shaft body, 2 is a cylindrical head hexagon socket screw, 3 is a screw plug, and 4 is an internal expansion type elastic sleeve.

Fig. 2 is a view of the 4-way internal expansion type elastic sleeve in fig. 1.

Detailed Description

In the figure 1, a cylindrical head socket head cap screw (2) and a plug screw (3) are screwed on a core shaft body (1) to position the cylindrical head socket head cap screw (2), and an internal expansion type elastic sleeve (4) is attached to the core shaft body (1) through a guide hole to enable two conical surfaces to be attached. Screwing the cylindrical head socket head cap screw (2) to enable the inner expansion type elastic sleeve (4) to move left to clamp the workpiece, and unscrewing the cylindrical head socket head cap screw (2) to enable the inner expansion type elastic sleeve (4) to move right to loosen the workpiece.

Claims

1. A pull-down type internal expansion elastic sleeve mandrel is characterized in that a plurality of U-shaped closed ring grooves are additionally formed in a plurality of groove intervals which are radially and equally divided along the axial direction in an internal expansion elastic sleeve from the outer end surface of the internal expansion elastic sleeve.