An engine hydraulic tappet tensioner

Abstract

The invention discloses a hydraulic tappet type stretcher of an engine, which comprises a stretcher casing, a tappet, a spring and a non-return valve, and further comprises a rocker arm, wherein the tappet is sleeved with the stretcher casing; the spring is arranged in the stretcher casing and positioned between the stretcher casing and the tappet; the non-return valve is used for supplying oil to the stretcher casing; the rocker arm is pivotally connected onto the engine; one end of the rocker arm is a hinged end and is hinged with the outer end of the stretcher casing, and the other end of the rocker arm is a tension end; and the tappet is pivotally connected onto the engine through the outer end of the tappet outside the stretcher casing. Due to limitation of the rocker arm, the tappet and the stretcher casing are not easy to dash off, and splashing of the oil during discharging is reduced; and meanwhile, due to leverage of the rocker arm, the tappet and the stretcher casing can be compressed easily during installation; installation and disassembly of operators are facilitated; labor intensity of operators is reduced; and the problem about short adjusted stroke in the prior art is solved effectively, so that stroke adjustment is more flexile.

Description

technical field [0001] The present invention relates to an automobile engine part, in particular to a hydraulic tensioner for an automobile engine chain, which comprises a tensioner housing, a tappet set in the tensioner housing, a A spring inside the body and between the tensioner housing and the tappet and a check valve for supplying oil into the tensioner housing. Background technique [0002] The tensioner is a tensioning device set up to avoid tooth skipping, chain dropping and slipping on the sprocket due to insufficient tension of the engine timing system chain or belt loose side. The tensioner in the prior art usually consists of two parts, namely the retaining ring and the tensioner body. When the tensioner is not in use, the core of the tensioner is in a compressed state; when in use, the retaining ring needs to be pulled out, and the core can play the role of adjusting the tightness of the chain under the action of the internal spring and oil pressure . But bec...

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Problems solved by technology

[0004] Due to the structure of the above-mentioned tensioner, it is difficult to install and disassemble the tensioner, especially on the production line, which increases the difficulty of operation for the operator and reduces the production efficiency.

In addition, because the tensioner with the above structure has the problem of short adjustment stroke, and because it is in direct contact with the chain or toothed belt, the friction coefficient is large, which affects the working reliability of the engine timing system

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