Cam shaft and timing gear connection structure

Abstract

The invention relates to a cam shaft and timing gear connection structure which comprises a cam shaft and a timing gear. The cam shaft and timing gear connection structure is characterized by further comprising a shaft head, wherein the cam shaft is hollow, the hollow cam shaft is connected with the timing gear through the shaft head, and the timing gear can be detached and replaced separately. The cam shaft and timing gear connection structure is simple in structure; the hollow cam shaft is connected with the timing gear through the shaft head, so that torsional strength is reliable; the cam shaft and timing gear connection structure has remarkable advantages with respect to light weight, energy conversation, cost reduction, material optimization and matching and the like; meanwhile, it can be guaranteed that the connecting mode of the timing gear and the cam shaft is consistent with an existing integrated cam shaft.

Description

technical field [0001] The invention relates to a connection structure between a camshaft and a timing gear, and belongs to the technical field of diesel engine accessory devices. Background technique [0002] The camshaft timing gear is an important part of the diesel engine. At present, the camshaft on the camshaft timing gear mainly has two structural forms: a solid camshaft and a hollow camshaft. [0003] For the solid camshaft, the existing problems are: (1) Since the mass of the solid camshaft is much larger than that of the hollow camshaft, the material cost is higher, which does not meet the requirements of light weight and cost reduction of the whole machine; (2) Since the camshaft is a rotating part that is constantly accelerating and decelerating, its acceleration and deceleration are accompanied by energy consumption. The greater the mass of the camshaft, the more energy consumption; A single material, instead of optimal matching of materials according to requir...

AI Technical Summary

Problems solved by technology

[0003] For the solid camshaft, the existing problems are: (1) Since the mass of the solid camshaft is much larger than that of the hollow camshaft, the material cost is higher, which does not meet the requirements of light weight and cost reduction of the whole machine; (2) Since the camshaft is a rotating part that is constantly accelerating and decelerating, its acceleration and deceleration are accompanied by energy consumption. The greater the mass of the camshaft, the more energy consumption; A single material, instead of optimal matching of materials according to requirements;

[0004] (2) For the hollow camshaft, the existing method is to directly heat fit the camshaft timing gear on the outer circle of the camshaft. Since the camshaft and the timing gear are connected by interference shrink fit, the timing gear cannot be replaced separately. As long as one of the two is damaged, the camshaft and timing gear can only be replaced as a whole.

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