Gas-distribution assembly and engine

Abstract

The invention provides a gas-distribution assembly and an engine. The gas-distribution assembly comprises a rotating shaft, a swinging rocker arm, a blocking assembly, a rocker arm rolling wheel and adriving wheel; the swinging rocker arm is rotationally arranged on the rotating shaft in a sleeving mode; the blocking assembly is connected with one end of the swinging rocker arm; the rocker arm rolling wheel is rotationally connected with the other end of the swinging rocker arm; and the driving wheel comprises a cam and a plurality of teeth, the multiple teeth are arranged in the circumferential direction of the cam, the rocker arm rolling wheel is a cylindrical gear, and the driving wheel meshes with the rocker arm rolling wheel. According to the gas-distribution assembly, the teeth arranged in the circumferential direction of the cam drive the rocker arm rolling wheel to rotate, so that the outer surface of the cam does not make direct contact with the smooth cylindrical rolling wheel any more, relative sliding between the cam and the rocker arm rolling wheel is reduced, thus fatigue abrasion caused by friction is reduced, and the service life of the gas-distribution assembly isprolonged; and the cam drives the rocker arm rolling wheel to rotate through the teeth, so that the transmission ratio of the cam to the rocker arm rolling wheel is more stable, and thus the gas-distribution assembly is conveniently controlled for exhaust.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an air distribution assembly and an engine. Background technique [0002] At present, in the related art, the rocker arm in the engine gas distribution mechanism is arranged on the rocker arm roller, and the rocker arm roller is a cylindrical roller, and the cylindrical roller cooperates with the cam, and the cam rotates, thereby driving the swing rocker arm to swing; There is a line contact between the cylindrical roller and the cam, and the relative sliding between the cylindrical roller and the cam is easy to cause fatigue wear in the contact area between the cylindrical roller and the cam, which in turn affects the service life of the valve train. Contents of the invention [0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art. [0004] To this end, a first aspect of the invention proposes a gas distribu...

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Problems solved by technology

[0002] At present, in the related art, the rocker arm in the engine gas distribution mechanism is arranged on the rocker arm roller, and the rocker arm roller is a cylindrical roller, and the cylindrical roller cooperates with the cam, and the cam rotates, thereby driving the swing rocker arm to swing; There is a line contact between the cylindrical roller and the cam, and the relative sliding between the cylindrical roller and the cam is easy to cause fatigue wear in the contact area between the cylindrical roller and the cam, which in turn affects the service life of the valve train

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