Tool for pressing small copper sleeve of engine connecting rod

Abstract

The invention discloses a tool for pressing a small copper sleeve of an engine connecting rod. The tool comprises a liner plate, a pressing sleeve, and a base fixed on a press, wherein a guide post is arranged inside an unthreaded hole at one end of the base corresponding to the pressing sleeve; the guide post is a stepped shaft which is thick in lower part and thin in upper part; a rack is arranged at the lower end of the guide post; a gear shaft meshed with the rack is arranged at one side of the rack; a locating sleeve of which the upper end face is matched with an inclined plane of the copper sleeve and the diameter corresponds to the copper sleeve is arranged on the step of the guide post; a bush for pressing the copper sleeve is sleeved on the upper end of the guide post, wherein the lower end surface of the bush is matched with the inclined plane of the copper sleeve; a diamond locating pin matched with the aperture of a large end of the connecting rod is arranged at the other end of the base; an inner hole of the pressing sleeve is a step hole which is large in lower part and small in upper part; the aperture of the small end of the step hole is smaller than the guide post; and the lower end face of the pressing sleeve is the inclined plane matched with that of the small head of the connecting rod, and a locating pin is arranged at the position of the inclined plane on the lower end of the pressing sleeve, corresponding to the plane end of the small end of the connecting rod. The tool disclosed by the invention is accurate in positioning and convenient to operate, and the pressing efficiency is improved.

Description

technical field [0001] The invention relates to a pressing tool in the field of mechanical engineering, in particular to a tool for pressing a copper sleeve. Background technique [0002] The copper sleeve of the small head of the connecting rod of the engine plays the role of transmitting the cylinder explosion pressure and guiding, and its performance directly affects the quality and reliability of the engine. The small head of the engine connecting rod has a circular hole equipped with a copper sleeve, the end faces at both ends of the circular hole are sloped, and the edge of the large end of the circular hole slope is a plane. In order to match the inclined surface of the small head of the connecting rod, the copper sleeve is in the shape of a circular tube, both ends of the circular tube are inclined, and there is a radial semicircular gap at the intersection of the inclined surface at the lower end and the horizontal middle section. Due to the special structure of th...

AI Technical Summary

Problems solved by technology

[0004] The current copper sleeve press-fitting process has the following disadvantages: only through the positioning shaft positioning, although there is a positioning sleeve to assist in determining the position and angle of the copper sleeve, the engine connecting rod is easy to shake and cannot be positioned accurately

The whole set of positioning device can not play the role of complete fixation, the position of the copper bushing is difficult to grasp, and it is easy to press the copper bushing crookedly

The positioning axis is manually controlled and cannot be fixed. It is inconvenient to operate, and it is easy to fall into the press machine tool, and the press-fitting efficiency is low.

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