Chain tensioner
AssigneeTsubakimoto Chain Co.
InventorsYudai Takagi, Masatoshi Sonoda
Life of this patent
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Abstract
Provided is a chain tensioner that can always provide a suitable reaction force and damping force to various tension fluctuations of the chain, has a simple structure, is easy to produce, and also enables a reduction in the production cost. The chain tensioner 100 has a plunger 120 inserted in a plunger bore 111, and biasing means 140 for biasing the plunger in a protruding direction of the plunger. A plurality of biasing means 140 are accommodated so as to freely expand and contract inside a high pressure chamber 101 and arranged in series along the protruding direction of the plunger 120, with a separator plate 130 interposed therebetween. The separator plate 130 has one or more oil passages that adjust oil flow.
Claims7
A chain tensioner comprising:
- a tensioner body having a cylindrical plunger bore with an open end;
- a cylindrical plunger with a bottom, slidably inserted in the plunger bore;
- and
- biasing means that biases the plunger in a protruding direction of the plunger and is accommodated so as to freely expand and contract inside a high pressure chamber formed to extend over interiors of the plunger bore and the plunger,
- the biasing means being provided in plurality in series along the protruding direction of the plunger,
- a separator plate being provided between the plurality of biasing means, and
- the separator plate partitioning the high pressure chamber into a plurality of compartments and including one or more oil passages that adjust flow of oil between the compartments of the high pressure chamber,
- wherein the outer periphery of the plunger slides on the inner wall of the cylindrical plunger bore, and
- wherein the separator plate is independently formed in a plate-like shape.
Dependencies are inferred from the claim text.