Press-fit mechanism for valve guide

Abstract

The invention discloses a press fitting mechanism of a valve guide pipe. The press fitting mechanism of the valve guide pipe comprises a power source providing driving force, a pressing plate fixed to the power source and a pressing head detachably connected with the pressing plate, wherein a guide pipe containing hole used for containing the valve guide pipe is arranged at the tail end of the pressing head. When the press fitting mechanism works, the valve guide pipe is arranged in the guide pipe containing hole firstly, then the power source drives the pressing plate to move, the pressing plate drives the pressing head to apply action force to the valve guide pipe in the guide pipe containing hole, and therefore the valve guide pipe is pressed into a guide pipe bottom hole in a cylinder cover. According to the press fitting mechanism, the pressing head and the pressing plate are detachably connected, so that different pressing heads can be replaced specific to valve guide pipes of different specifications, and a wide application range is further obtained. Meanwhile, the press fitting mechanism does not need to be beaten manually, and the labor intensity for operators is further relieved.

Description

technical field [0001] The invention relates to the technical field of engine assembly, in particular to a press-fitting mechanism of a valve guide. Background technique [0002] The valve guide is the guide device of the engine valve, which guides the valve and transfers the heat on the valve stem to the cylinder head through the valve guide. When assembling the engine, the valve guide is pressed into the bottom hole of the guide tube in the cylinder head by external force, and then the guide hole is finished. Therefore, the press-fitting quality of the valve guide will directly affect the processing quality of the subsequent finishing process. The deflection will lead to uneven processing of the wall thickness of the conduit hole. During the operation of the engine, there will be abnormal contact between the valve and the conduit hole, which will accelerate the wear of the conduit hole and affect the performance parameters of the whole machine. [0003] There are two ways...

AI Technical Summary

Problems solved by technology

When special equipment is used, the pressure head is driven and directly acts on the valve guide. Since the pressure head and the power source form an integrated structure, the special equipment can only be used for the press-fitting of a valve guide of one specification.

When the manual method is used, the valve guide is driven into the bottom hole of the guide tube by continuous beating by hand, resulting in excessive labor intensity for the operator.

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