Dedicated clamp for reaming sheath of connecting rod of engine

Abstract

A special fixture for reaming on the connecting rod sleeve of engine has a fixture body consisting of a locating surface matched with the reference end face of said connecting rod, a clamping unit for fastening said connecting rod onto said locating face, and a guide sleeve with an internal hole matched with the guide post of reamer.

Description

technical field [0001] The invention relates to the technical field of special maintenance tools for engine connecting rod sleeves, in particular to a special clamp for reaming of engine connecting rod sleeves. Background technique [0002] Known engine connecting rod, its one end is connected with piston by piston pin, and its other end is fixedly connected with crankshaft by connecting rod bearing cap. During work, there is relative rotation between the connecting rod sleeve and the piston pin, which is prone to wear and tear. After the connecting rod sleeve is worn, the noise of the engine will increase and the air pressure ratio will decrease, seriously affecting the normal operation of the engine, so it must be replaced. The new connecting rod sleeves have machining allowances. Although ordinary reamers can guarantee a certain shape accuracy and dimensional accuracy, because there is no special fixture in ordinary auto repair shops, accurate positioning and clamping of ...

AI Technical Summary

Problems solved by technology

During work, there is relative rotation between the connecting rod sleeve and the piston pin, which is prone to wear and tear. After the connecting rod sleeve is worn, the noise of the engine will increase and the air pressure ratio will decrease, which will seriously affect the normal operation of the engine, so it must be replaced.

The new connecting rod sleeves have machining allowances. Although ordinary reamers can guarantee a certain shape accuracy and dimensional accuracy, because there is no special fixture in ordinary auto repair shops, accurate positioning and clamping of the connecting rod sleeves cannot be achieved. Therefore, the position accuracy of the connecting rod sleeve cannot be guaranteed, that is to say, in the case of manual control, the axis of the processed connecting rod sleeve hole cannot be guaranteed to be perpendicular to its process reference (one end face of the connecting rod). After the repaired connecting rod sleeve is assembled to the engine, the piston will be skewed in the cylinder, causing eccentric wear between the piston and the cylinder, air leakage and oil leakage between the piston group and the cylinder. If the verticality difference is too large, the connecting rod will be damaged. Will not be able to assemble, and eventually only the connecting rod can be replaced, which greatly increases the maintenance cost

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