Roller-type hydraulic rocking arm component

Abstract

The invention discloses a roller-type hydraulic rocking arm component. The structure is as follows: one end of a rocking arm is provided with a short shaft, a bearing is embedded outside the short shaft and into the roller, and the roller and a camshaft form a transmission pair; an oil duct is arranged in the rocking arm, the middle part of the rocking arm is provided with a rocking arm shaft, the other end of the rocking arm is provided with a plunger bushing, and a plunger, a check valve and a return spring are sequentially arranged in the plunger bushing; the upper end of the plunger bushing is provided with a plunger cover plate, and the plunger cover plate is provided with an oil return channel; and the plunger bushing is connected with a slider through a cutting sleeve, the slider closely contacts a valve bridge, and the valve bridge contacts a valve push rod mechanism. The invention is suitable for an overhead camshaft mechanism, and the structure is simplified since the valve support column, the push rod and other parts connected with the cam are reduced. The rocking arm forms a zero-clearance fit with the camshaft and the valve push rod, thereby lowering the noise. On the premise of enhancing the strength of the engine block, cylinder head and the like, the volume of the engine is reduced, so that the structure is more compact reasonable, and the economical efficiency and power performance of the engine are enhanced.

Description

technical field [0001] The invention belongs to engine gas distribution system components, in particular to a roller type hydraulic rocker arm device. technical background [0002] With the rapid development of technology in the automotive industry and increasingly stringent environmental protection requirements, more stringent requirements are put forward for engines in terms of economy, emissions, and noise. At present, most engines use high-pressure common rail electronic injection technology, which makes the coordination requirements of fuel injection and valve timing more precise. The camshaft, which is used as the engine valve mechanism, is currently placed downwards, and the power is transmitted to the rocker arm with tappets, push rods and other components. This structure is not only complicated, but also accelerates mechanical wear and increases the clearance. Therefore, frequent adjustments are required. Valve and rocker arm clearance to ensure the work requiremen...

AI Technical Summary

Problems solved by technology

The camshaft, which is used as the engine valve mechanism, is currently placed downwards, and the power is transmitted to the rocker arm with tappets, push rods and other components. This structure is not only complicated, but also accelerates mechanical wear and increases the clearance. Therefore, frequent adjustments are required. Valve and rocker arm clearance to ensure work requirements

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