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US 8,137,225 B2Granted
Chain tensioner device
AssigneeHonda Motor Co., Ltd.
InventorsNaoko Muguruma, Shinji Yamada, Yuji Matsumochi, Yuuji Fujimoto, Yojiro Koiwa
Life of this patent
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Abstract
A chain tensioner device having a first slide surface of a main arm pivotably supported at an upper end thereof, and a second slide surface of a sub-arm pivotably supported at a lower end thereof. The first and second slide surfaces slidably abut against each other. When the main arm is biased toward a timing chain via the sub-arm by a biasing force of a plunger of a tensioner lifter, a stroke of the main arm is increased with respect to a stroke of the plunger.
Claims5
A chain tensioner device comprising:
- an endless chain;
- a main arm pivotably supported by a first support shaft and brought into slide contact with the endless chain to apply a predetermined tension to the endless chain, the endless chain being wrapped around a drive sprocket provided on a driving shaft and a follower sprocket provided on a follower shaft;
- a tensioner lifter that generates a biasing force for biasing the main arm toward the endless chain;
- and
- a sub-arm pivotably supported by a second support shaft, the sub-arm transferring the biasing force of the tensioner lifter to the main arm,
- wherein a first slide surface provided on the main arm and a second slide surface provided on the sub-arm slidably abut against each other to increase a stroke of the tensioner lifter and transfer the stroke to the main arm,
- wherein the main arm has a first bump and the sub-arm has a second bump, the first slide surface being defined along the first bump and the second slide surface being defined along the second bump, and
- wherein the first slide surface of the main arm abuts against the second slide surface of the sub-arm from a side of the second support shaft.
5 more elements
Dependencies are inferred from the claim text.