| 摘要 |
<P>PROBLEM TO BE SOLVED: To appropriately lubricate a connection part of a first motor shaft configuring a hydraulic motor and a second motor shaft configuring an electric motor at all times. <P>SOLUTION: A shaft insertion hole 23E to which the upper end side of the first motor shaft 27 is to be inserted is provided on a lid part 23B of an electric motor casing 23, a bearing 28 is provided between the shaft insertion hole 23E and the first motor shaft 27, and a pressure-resistant seal 43 is positioned and provided on the upper side than the bearing 28. Thus, by utilizing drain oil leaking from the hydraulic motor 34, the connection part of a female spline part 27B of the first motor shaft 27 and a male spline part 41A of the second motor shaft 41 is appropriately lubricated at all times. Also, by sealing the space between the shaft insertion hole 23E of the electric motor casing 23 and the first motor shaft 27 by the pressure-resistant seal 43, the intrusion of the drain oil into the electric motor casing 23 is surely prevented. <P>COPYRIGHT: (C)2012,JPO&INPIT |
