Connecting structure and mounting and fixing method for crankshaft and timing sprocket and engine

Abstract

The invention discloses a connecting structure and a mounting and fixing method for a crankshaft and a timing sprocket and an engine and belongs to the field of engine design. The connecting structure for the crankshaft and the timing sprocket is arranged on the crankshaft and the timing sprocket, and comprises a locating slot, a locating key, a sleeve and a fixing bolt, wherein the timing sprocket and the sleeve are sequentially sleeved on the crankshaft journal, the locating slot is processed on the end face of the crankshaft, the locating key is processed on the surface where the timing sprocket is matched with the crankshaft, the timing sprocket and the crankshaft form key connection, the crankshaft is provided with a threaded hole, the fixing bolt penetrates through the threaded hole, and the sleeve and the timing sprocket are fixed on the crankshaft through the fixing bolt. According to the connecting structure and the mounting and fixing method for the crankshaft and the timing sprocket and the engine, the locating slot is processed on the end face of the crankshaft, the locating key is processed on the surface where the timing sprocket is matched with the crankshaft, and the crankshaft and the timing sprocket are located and assembled through a keyway, so that the assembly is easy, and the maintenance and dismounting are convenient.

Description

technical field [0001] The invention relates to the field of engine design, in particular to a connection structure of a crankshaft timing sprocket, an installation and fixing method and an engine. Background technique [0002] As we all know, the timing sprocket is an important part of the engine gas distribution system. The timing sprocket is equivalent to the timing belt. The connection between the timing sprocket and the crankshaft and a certain transmission ratio ensure the intake and exhaust time. accurate. [0003] At present, the installation and fixing method of the timing sprocket of the automobile engine is usually: the connection and fixing method of the axial surface interference is adopted, and the crankshaft and the timing sprocket are heated on the special heating equipment, and the timing sprocket is set on the crankshaft with tools. Install on it. [0004] In the process of realizing the present invention, the inventor finds that there are at least the fo...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the crankshaft and the timing sprocket are connected and fixed with axial surface interference in the prior art, the assembly difficulty is high, and the disassembly and maintenance are very inconvenient, the embodiment of the present invention provides a crankshaft timing sprocket The connection structure, installation and fixing method and engine

Images