Patent ID: 8910769

Claim:
A lubricating structure of a transmission, comprising: an input shaft which is input with a motive power from a prime mover; a transmission mechanism provided rotatably and concentric to the input shaft; a clutch which is capable of freely switching between an engagement mode in which the motive power input to the input shaft to the transmission mechanism is transmitted, and to a disengagement mode in which the transmission is shut off; a first oil passage extending in the input shaft from one end thereof to a first position corresponding to a position of the clutch, and which is supplied with lubricating oil; a second oil passage extending in the input shaft from the first position to a second position corresponding to a position of the transmission mechanism; and a connecting oil passage which connects the first oil passage and the second oil passage at the first position, wherein the input shaft is provided with a first lubrication hole which pierces an inner circumferential surface of the first oil passage to an outer peripheral surface of the input shaft for distributing the lubricating oil to the clutch at the first position, and a second lubrication hole which pierces an inner circumferential surface of the second oil passage to an outer peripheral surface of the input shaft for distributing the lubricating oil to the transmission mechanism at the second position, and the one end of the first oil passage is configured to connect to a lubricating oil source.