Crank pulley assembly method and guiding tool

Abstract

The invention relates to an assembly method for a crankshaft pulley and a guide tool of the method. The crankshaft pulley is arranged on a crankshaft through interference fit. A small end of the crankshaft and the crankshaft pulley are provided with positioning grooves respectively. A pulley assembly guide tool is arranged on the crankshaft pulley. The crankshaft wheel and the pulley assembly guide tool are arranged on the small end of the crankshaft together and are pressed. The pulley assembly guide tool comprises an internal circular sleeve and an external circular sleeve, wherein an axial long slide way is arranged between the internal circular sleeve and the external circular sleeve. The internal circular sleeve is provided with a positioning key which is matched with the positioning groove of the small end of the crankshaft. The external circular sleeve is provided with a positioning key which is matched with the positioning groove of the crankshaft pulley. The method and the guide tool of the method are used for assembling crankshaft pulleys of diesel engines, solves the problem of difficult alignment of positioning groove of the crankshaft pulley and the positioning groove of the small end of the crankshaft, avoids phase angle change of the crankshaft pulley relative to the small end of the crankshaft during the pressing process of the crankshaft pulley and ensures the assembly accuracy of the crankshaft pulley and the stability of the assembly quality.

Description

technical field [0001] The invention relates to an assembly method of a crankshaft pulley and a guide tool used in the assembly method, in particular to a crankshaft and a pulley with a keyless connection, and an interference amount is used between the crankshaft small end and the crankshaft pulley to transmit torque to the crankshaft pulley The assembly method and the guide tooling used. Background technique [0002] Usually, the assembly requirement between the small crankshaft end of a diesel engine and the crankshaft pulley is a transition fit, relying on the keyway on the crankshaft small end and the keyway on the crankshaft pulley to transmit torque through the key. The disadvantage of this structure is that processing a keyway on the relatively small crankshaft head will cause serious damage to the strength of the crankshaft head, so that the crankshaft head often breaks. [0003] The method to solve the above problems is to adopt the structure of interference fit be...

AI Technical Summary

Problems solved by technology

In this way, the difficulty of assembling the crankshaft pulley is increased. During assembly, it is difficult to determine the relative angle between the crankshaft pulley and the small end of the crankshaft. Due to the increased interference between the crankshaft pulley and the small end of the crankshaft, the force and difficulty of pressing the crankshaft are increased. Large, or after being pressed in, the position deviation between the crankshaft pulley and the small end of the crankshaft is easy to occur

The previous assembly tooling tools have been unable to meet the assembly requirements of this new structure pulley

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