Press fitting device of cam shaft bush of diesel engine

Abstract

The invention discloses a press fitting device of a cam shaft bush of a diesel engine. The press fitting device comprises a compression bar and a limiting stick. A bush inserting head is arranged at one end of the compression bar, pressing blocks are arranged on the side face of the bush inserting head, a bush pre-positioning spring steel ball mechanism is arranged inside each pressing block, and backstop protrusions which protrude in the radial direction are arranged at the other end of the compression bar. A guiding groove is formed in the axial direction of the side face of the compression bar, and the guiding groove and steel balls of the bush pre-positioning spring steel ball mechanisms are placed in the same circumferential generatrix position of the compression bar. The limiting stick penetrates into an oblique oil hole from the position above a first gear of a cam shaft hole and falls into the guiding groove of the compression bar, and the circumferential position of the compression bar in the cam shaft hole is positioned so that the oblique oil hole can right face towards the guiding groove. When the press fitting device of the cam shaft bush of the diesel engine is used for press fitting of the cam shaft bush, the compression bar is made to directly penetrate into the cam shaft hole, meanwhile, the limiting stick penetrates into the oblique oil hole which communicates a spindle hole and the cam shaft hole from the position above the spindle hole, and the limiting stick is inserted into the guiding groove of the compression bar so that the compression bar can be positioned in the circumferential direction. Positioning operation is simple, precision is high, and press fitting efficiency is high.

Description

technical field [0001] The invention relates to the field of engines, in particular to a press-fitting device for a camshaft bushing of a diesel engine. Background technique [0002] The camshaft bushing of a diesel engine, as an important part of the diesel engine's gas distribution mechanism, requires its position to be accurate and effective during installation, so that the bushing oil hole and the inclined oil hole (hereinafter referred to as the inclined oil hole) passing through the main shaft hole and the camshaft hole ) alignment to ensure smooth passage of diesel lubricating oil. [0003] In the prior art, the installation of camshaft bushings is usually realized by manual operation of a press-fitting device during small-batch or trial production of diesel engines, such as figure 1 and figure 2 As shown, the pressing device includes: a pressing rod 1 and a guide sleeve 2, wherein the pressing rod 1 is used for pressing the bushing, and its left end has a bushing ...

AI Technical Summary

Problems solved by technology

[0008] In addition, in order to ensure the quality of the guide, the structure design of the guide sleeve is stronger and heavier than the general ones, and every time a part is pressed, the guide sleeve must be manually installed and disassembled, which is time-consuming, laborious and inefficient

The guide sleeve is a separate part, which needs to be designed and manufactured, which also increases the manufacturing cost

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