Hinge type three-jaw self-adaption compressing mechanism

Abstract

The invention belongs to the technical field of clamps and relates to a hinge type three-jaw self-adaption compressing mechanism. The hinge type three-jaw self-adaption compressing mechanism comprisesa bearing pedestal with an axial through hole, a connection base, a pull rod and a conical sleeve, wherein the connection base is fixed to the upper end of the bearing pedestal; three rotary press boards are evenly distributed at the upper end of the connection base; the pull rod is movably matched in the axial through hole of the bearing pedestal; the upper end of the pull rod penetrates througha center hole of the connection base to upwards extend; the upper portion of the pull rod is linked with the three press boards, so that when the pull rod stretches out and draws back, the press boards rotate relative to the connection base; the conical sleeve is fixed to the top end of the pull rod in an axial limiting mode, a center elastic loop is arranged inside an inner hole of the conical sleeve in an attachment mode, and the center elastic loop is arranged on a cylindrical table formed at the upper end of the pull rod in a sleeving mode; and bosses are arranged at the tail ends of thepress boards, and during working, the bosses are matched with upwards conical faces of the conical sleeve. The compressing mechanism can reliably compress stepped faces orifice workblanks.

Description

technical field [0001] The invention belongs to the technical field of fixtures, and relates to a hinged three-jaw self-adaptive pressing mechanism. Background technique [0002] With the continuous development of the automobile industry and the intensification of competition in the automobile industry, the requirements for the machining accuracy of auto parts are also getting higher and higher. When it is necessary to use the blank hole of the part to position and press, a pressing mechanism is required. And when the pressing position is on the casting surface of the step hole of the workpiece, and when the workpiece needs to be reliably pressed at this position, it is difficult to put in a plurality of pressing mechanisms because the hole of the workpiece is smaller. And when adopting three-point rigid synchronous pressing mechanism, because the cast surface precision of workpiece is relatively poor, three pressing points are difficult to compress workpiece simultaneously...

AI Technical Summary

Problems solved by technology

However, when the pressing position is on the casting surface of the stepped hole of the workpiece, and it is necessary to reliably press the workpiece at this position, it is difficult to put in multiple pressing mechanisms because the hole of the workpiece is small.

However, when a three-point rigid synchronous pressing mechanism is used, it is difficult for the three pressing points to simultaneously press the workpiece due to the poor precision of the casting surface of the workpiece.

Causes the workpiece to be uncompressed in a certain direction

Vibration occurs during processing, resulting in reduced processing accuracy

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