Patent ID: 8215470

Claim:
A starting device, comprising: a housing connected to an output shaft of a drive source; an output side member that has a through hole into which an input shaft of a speed change mechanism can be inserted, the output side member being connected to the input shaft so as to be capable of rotating integrally therewith; a clutch mechanism that couples the housing to the output side member such that power can be transmitted therebetween through a clutch operation; a working oil passage that supplies working oil to a hydraulic chamber of the clutch mechanism from an oil pressure source side; and a lubricating oil passage including a supply oil passage that supplies lubricating oil to the housing from the oil pressure source side and a return oil passage for returning the lubricating oil to the oil pressure source side from the housing, wherein: the working oil passage and the lubricating oil passage are formed to overlap at least partially in an axial direction, the lubricating oil passage includes a first lubricating oil passage formed in the input shaft, a front end surface side oil groove that extends in a radial direction orthogonal to an axis of the input shaft, a rear end surface side oil groove that extends in the radial direction orthogonal to the axis of the input shaft, and a second lubricating oil passage formed on an outer peripheral surface of the input shaft, the first lubricating oil passage and the front end surface side oil groove form the supply oil passage, the rear end surface side oil groove and the second lubricating oil passage form the return oil passage, the working oil passage is formed in the input shaft and opening at the outer peripheral surface of the input shaft, the lubricating oil passage is formed in the input shaft and opening at a front end surface of the input shaft, part of the lubricating oil passage is between the output side member and a front cover of the housing and between the front end surface of the input shaft and the front cover, part of the working oil passage is in the output side member, is connected to the opening at the outer peripheral surface of the input shaft, and is inclined in an extension direction thereof such that a radial inner side part of the working oil passage at the output side member is closer to the front cover than a radial outer side part of the working oil passage at the output side member, and the radial inner side part of the working oil passage and the front end surface side oil groove of the lubricating oil passage axially overlap.