A camshaft structure

Abstract

The invention discloses a novel cam shaft structure which comprises a shaft rod and a shaft rod core. The shaft rod is provided with a shaft rod sleeve with an inner thread. A shaft hole is formed along the center line of the shaft rod sleeve. A first positioning groove is formed in the outer wall of the shaft rod sleeve. A first oil groove is formed in the outer wall of the shaft rod sleeve in the radial direction. A first oil hole is formed in the first oil groove and communicated with the shaft hole. The shaft rod is sleeved with a check ring. The novel cam shaft structure has the beneficial effects that the novel cam shaft structure is easy to replace and convenient to maintain, the service life is prolonged, and cost is reduced.

Description

technical field [0001] The invention relates to a camshaft structure. Background technique [0002] Existing engine combustion process mainly comprises air intake, compression, power and exhaust, and wherein, air intake is that piston descends from top dead center to bottom dead center, and intake valve 51 is opened, and exhaust valve 52 is closed, and at this moment, cylinder 5 A partial vacuum negative pressure is generated inside, and the mixture of gasoline and air is sucked into the cylinder 5; during the compression stroke, the piston moves upward from the bottom dead center to the top dead center, at this time, the gas valve is closed, the exhaust valve is opened, and the exhaust gas burned in the cylinder 5, Exhaust to the atmosphere through the exhaust valve 52; the main component of the switch between its intake valve 51 and exhaust valve 52 of the control engine is the camshaft, and the existing camshaft is mainly integrally formed with an intake cam and an exhaus...

AI Technical Summary

Problems solved by technology

[0002] Existing engine combustion process mainly comprises air intake, compression, power and exhaust, and wherein, air intake is that piston descends from top dead center to bottom dead center, and intake valve 51 is opened, and exhaust valve 52 is closed, and at this moment, cylinder 5 A partial vacuum negative pressure is generated inside, and the mixture of gasoline and air is sucked into the cylinder 5; during the compression stroke, the piston moves upward from the bottom dead center to the top dead center, at this time, the gas valve is closed, the exhaust valve is opened, and the exhaust gas burned in the cylinder 5, Exhaust to the atmosphere through the exhaust valve 52; the main component of the switch between its intake valve 51 and exhaust valve 52 of the control engine is the camshaft, and the existing camshaft is mainly integrally formed with an intake cam and an exhaust cam on the shaft rod. The cams are respectively in contact with the rocker arms 511 of the intake valve 51 and the exhaust valve 52, so that the intake cam and the exhaust cam form a certain staggered angle and are set up to control the opening and closing of the intake and exhaust valves 52. , because the intake cam and the exhaust cam on the existing camshaft are integrally formed with the shaft rod, so the staggered angle between the two is fixed. When developing an engine, it is necessary to make different types of different staggered angle specifications. Air cam and exhaust cam are expensive; in addition, in the existing camshaft structure, the intake cam and exhaust cam are integrally formed on the shaft. When any one of the camshaft, intake cam, exhaust cam or shaft When damage occurs, the entire camshaft needs to be replaced, reducing the service life of the entire camshaft

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