Small size universal petrol engine valve swing arm directional working mechanism

Abstract

A valve rocker orienting operating organ for a small-sized general purpose petrol engine consists of a regulating screw rod 1, an adjusting nut 2, a valve rocker 3, a guide block 4, a valve backlash adjustment female screw 5, a locking nut 6 and guide keys 7, is characterized in that the rectangle guide block 4 is mounted at middle of the regulating screw rod 1, the valve backlash adjustment female screw 5 is mounted between the guide block and the locking nut 6; said bottom of the guide block and the valve rocker is of crown face with both sides being of plane, the crown face of the guide block is inserted into the crown face flute of the valve rocker and matches with the clearance, the planes at both sides of the crown face of the valve rocker flute lean against both sides of the planes at both sides of the guide pad crown face. In cases the valve push rod bracket is canceled, said invention is capable of effectively ensuring the orienting swing of the valve rocker according to its law of motion (by opening and closing the feeding and exhaust valve according to the phase of valve distribution on time) to ensure the petrol engine power. At the same time, frictions between the valve push rod and the bracket are eliminated, resulting in well running and trouble-free service.

Description

technical field [0001] The invention relates to a gasoline engine accessory, in particular to a small-sized universal gasoline engine valve rocker arm orientation working mechanism. Background technique [0002] At present, the domestically used valve rocker arm working mechanism on small general-purpose gasoline engines is produced by Japan's Honda Corporation. From a structural point of view, the mechanism consists of ① a valve clearance adjusting screw with a nut in the lower section, ② a cylindrical adjusting nut body with a nut at the upper end and a spherical lower end, ③ a valve rocker with a groove at the bottom and dimples or convex hulls on both wings. Arm, ④ lock nut and other components. Wherein the adjusting screw rod passes through the rocker arm of the valve, the adjusting nut body and the locking nut in turn. The spherical end of the adjusting nut body is inserted into the groove of the valve rocker arm, and the bottom surface of the...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a small general-purpose gasoline engine valve rocker arm orientation working mechanism, which solves the problem that the valve rocker arm and the cylindrical adjustment nut body swing around the adjustment screw in the prior art and affect the engine power; at the same time, it solves the problem that there is no The valve push rod bracket, the valve push rod will come out of the spherical recess of the valve rocker arm, which will affect the opening and closing time of the valve, and the problem of wear and noise caused by friction between the valve push rod and the bracket

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