Roller chain link construction and method of manufacture

摘要

A power transmission roller chain link construction comprises a first link pin plate with a pair of spaced apart substantially parallel link pins secured to said plate in a press-fit so that they extend parallel to the plate. A bushing is fitted over each pin and a roller link plate is press-fitted on the bushing adjacent each of its ends. A roller is rotatably mounted on each bushing between the roller link plates. The link pins, link pin portion and a rod portion extending outwardly from each link pin portion beyond the second link plate, the second link plate being press-fitted to the link pin adjacent their opposite ends from the first link plate. The rod portion of each link pin has a threaded area adjacent the second link plate and a nut is threadably engageable on the threaded area. The link is manufactured by first press-fitting the link pins to the first pin link plate thereafter assembling the bushing with the roller link plates at each end over the pin and assembling a bushing between the plates. Thereafter a second pin link plate inserted over rod-like extensions of the link pins and press-fitted to the link pins in the same manner as the first link pin plate. Second link pin plate is tightened against the bushing assembly by a nut which is threaded on a threaded portion of the rod-like extension. A nut is threaded downwardly on a threaded portion of the rod-like extension which is adjacent to the second link plate so as to force the plate into position spaced by the same amount from the roller link plate as the first pin link plate. Preferably resilient O-rings are interposed between the associated roller link plates and the pin link plates. After securing the second pin plate in position by threading the nut along the threaded area of the rod portion, the rod portion is broken away from the remaining part of the assembly. Advantageously the resilient O-ring is also fitted into a groove formed on the associated link pins exteriorily of the second link plate.