Clamping device

Abstract

The invention discloses a clamping device. A hexagonal groove and a circular groove are arranged inside a mandrel sequentially and axially; a radial rectangular hole is arranged on the sidewall of the hexagonal groove in a penetration manner; a ball is positioned in the rectangular hole of the mandrel; the ball is exposed locally outside the hexagonal groove and cannot fall off; a follower is inserted into the circular groove of the mandrel; one end of the follower is capable of extending into the hexagonal groove elastically and locally; an outer jacket is sleeved outside the mandrel and can do an elastic reciprocal motion relative to the mandrel; an inner jacket is located between the outer jacket and the mandrel; and the inner jacket is capable of elastically propping against the ball and is moved in a length direction of the rectangular hole. According to the clamping device, a work piece can be replaced quickly; when the work piece is inserted into the hexagonal groove of the mandrel, the inner jacket pushes the ball to clamp the groove on a tail part of the work piece automatically without the need to pull out the outer jacket manually, thereby finishing the connection between the mandrel and the work piece easily and reducing the use times of the outer jacket; and when the work piece is replaced, the work piece is pushed out forcibly by a spring and simultaneously does not fall off under the action of the magnetic attraction of the follower, thereby reducing the pickup frequency after the work piece falls off.

Description

technical field [0001] The invention relates to the technical field of collets, in particular to a clamping device suitable for hexagonal workpieces. Background technique [0002] In U.S. Patents No. 4,900,202 and No. 5,013,194, a chuck is disclosed to quickly clamp and replace a hexagonal workpiece. The overcoat 40 performs a reciprocating displacement movement relative to the mandrel 10, and one end of the mandrel 10 is axially recessed with a receiving groove 72, and a hexagonal workpiece 60 can be placed in the groove, and the groove wall of the receiving groove 72 is arc-shaped relative to the workpiece 60. The part of the groove 61 is provided with one or more ball sockets 73, each ball socket 73 penetrates from the outer peripheral surface of the mandrel 10 to the side wall surface of the accommodation groove 72, each ball socket accommodates a single ball 20, and the ball 20 partially exposes the accommodation groove 72 side walls, and can fall into the groove 61 of...

AI Technical Summary

Problems solved by technology

Because the collet has no structure to block the workpiece, the workpiece will be ejected from the outside of the mandrel and fall to the ground, and it has to be picked up again, which is inconvenient to use

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