Patent ID: 8696500
Filing Date: 2014-04-15
Classification: F16H

Abstract:
1. In combination with an engine having a traveling transmission chain, a tensioner lever comprising an elongated lever body having front and back sides, and two opposite lateral sides, and an elongated shoe having a back side supported by the front side of the lever body and a front surface for sliding contact with the transmission chain, the chain being arranged to travel along the direction of elongation of the shoe from a first end thereof toward an opposite end thereof, a boss formed on the lever body adjacent the first end of the shoe, the boss having a through hole for receiving a shaft portion of a shoulder bolt and having opposite ends spaced from each other along the direction of said through hole, said through hole having an inner surface, a shoulder bolt mounted on said engine, and having a shaft portion extending through the boss of the lever body, the shaft portion extending from a surface of the engine to a shoulder of the shoulder bolt, and each of said opposite ends of the boss being capable of contacting one of said surface of the engine and said shoulder to limit axial movement of the boss on the shaft portion, the boss having an inner circumferential surface and an outer circumferential surface, and an oil guiding groove formed in the boss and extending from the inner circumferential surface to the outer circumferential surface in the direction from the first end of the shoe toward the opposite end thereof, for guiding engine oil adhering to the lever body to a region between the shaft portion of the shoulder bolt and the inner surface of the through hole, at least part of said oil guiding groove extending through the boss at a location between said opposite ends thereof and closer to said one of said opposite ends of the boss than to the other of said opposite ends of the boss.