Chain guide and chain tensioner device

摘要

Disclosed is a lightweight and inexpensive chain guide that has little mechanical loss. The chain guide comprises: a plurality of rollers (2) which make contact with a chain; a chain guide base (10) which supports the plurality of the rollers (2) disposed along a direction of travel of the chain, and a plurality of shafts (3) attached to the chain guide base (10) at predetermined intervals along the direction of travel of the chain. Each of the rollers (2) includes a rolling-element bearing portion constituted of a cylindrical outer ring main body (20) encompassing an outer circumferential face of the shaft (3), and a plurality of rolling elements (21) disposed between the outer circumferential face of the shaft and an inner circumferential face of the outer ring main body (20). The outer ring main body (20) is supported on the chain guide base (10) via the shaft (3) so as to be in rolling contact with the chain.

主权项

1. A chain guide comprising: a plurality of rollers which make contact with a metallic timing chain which drives intake and exhaust valves of an engine; a chain guide base which supports the plurality of the rollers disposed along a direction of travel of the chain; and a plurality of shafts attached to the chain guide base at predetermined intervals along the direction of travel of the chain,
each of the rollers including a rolling-element bearing portion constituted of a cylindrical outer ring main body encompassing an outer circumferential face of the shaft, and a plurality of rolling elements disposed between the outer circumferential face of the shaft and an inner circumferential face of the outer ring main body, the outer ring main body being supported on the chain guide base via the shaft so as to be in rolling contact with the timing chain without causing sliding friction, and the chain guide base comprising a pair of side plates and pillar members connecting the side plates, the pair of the side plates being formed in a curved shape so as to be along the direction of travel of the chain, and the rollers being disposed between members of the side plates.