Chain guide for transmission device
AssigneeTsubakimoto Chain Co.
InventorMasanori Yokoyama
Life of this patent
Estimating the term…
Abstract
In an engine timing transmission, one end of a unitary molded glass fiber-reinforced resin chain guide is pivotally supported on a bolt fixed to an engine block. A supporting portion adjacent the opposite end of the chain guide is in abutting relationship with the engine block. An intermediate supporting portion on the chain guide is spaced from the engine block, but, when tension in the chain increases, the chain guide flexes, allowing the intermediate supporting portion to come into abutting relationship with the engine block. Through holes in the chain guide allow deformation of the supporting portions.
Claims8
The combination of an engine comprising an engine block and a chain transmission including a chain, and a chain guide, and a mounting shaft fixed to the engine block, said chain guide comprising an elongated guide body having opposite first and second ends spaced from each other along the direction of elongation of the guide body, and a sliding contact surface in sliding engagement with the chain, wherein the first end of the chain guide is pivotally supported on the mounting shaft, an end-supporting portion of the guide body adjacent the second end of the guide body is in abutting relationship with the engine block, and a central supporting portion of the guide body, at an intermediate location between said first and second ends, is spaced from the engine block when the tension in the chain is below a predetermined level, but in abutting contact with the engine block when the tension in the chain is at and above said predetermined level.
Dependencies are inferred from the claim text.