Patent ID: 9086133
Filing Date: 2015-07-21
Classification: F16H

Abstract:
1. A lubricating structure of a transmission comprising: a shaft which rotates in a transmission; and a pipe which has a proximal end portion thereof secured to a case of the transmission and through which lubricating oil is supplied from a proximal end thereof, wherein the shaft has an internal space which extends along a rotational axis line thereof, the internal space has a large-diameter portion of a predetermined diameter which opens at one end of the shaft, a small-diameter portion having a diameter which is smaller than that of the large-diameter portion, and a stepped portion between the large-diameter portion and the small-diameter portion, the pipe is inserted into the large-diameter portion such that a predetermined gap is formed between the pipe and an internal peripheral surface of the large-diameter portion, the shaft has a first shaft lubrication hole penetrating from the large-diameter portion to an outer peripheral surface of the shaft and a second shaft lubrication hole penetrating from the small-diameter portion to the outer peripheral surface of the shaft, the pipe has a first pipe lubrication hole penetrating from an inner peripheral surface thereof to the gap, a distal end of the pipe has a second pipe lubrication hole of a diameter which is smaller than the diameter of the first pipe lubrication hole, and a passage from the gap to the small-diameter portion is narrowed by a distal end portion of the pipe and the stepped portion.