ELECTRICAL ROTARY MACHINE AND HYBRID CONSTRUCTION MACHINE HAVING THE ELECTRICAL ROTARY MACHINE

摘要

PROBLEM TO BE SOLVED: To improve durability, stability and reliability by constantly supplying a lubricant to an engagement part of a female spline part and a male spline part.SOLUTION: A casing 26 comprises casing-side oil paths 31 and 32 for circulating lubricants toward outer circumferential surfaces 37A2 and 37B2 of cylindrical portions 37A and 37B of a hollow shaft part 37 in a rotor 36. The hollow shaft part 37 in the rotor 36 includes rotor-side oil paths 43 and 44 for circulating lubricants flowing out of the casing-side oil paths 31 and 32 from an outer circumferential side of the hollow shaft part 37 to engagement parts of female spline parts 38 and 39 and male spline parts 13A and 21D. Between the casing-side oil paths 31 and 32 and the rotor-side oil paths 43 and 44, casing-side recessed grooves 53 and 54 are provided for guiding the lubricants to all the circumferences of the outer circumferential surfaces 37A2 and 37B2 of the cylindrical portions 37A and 37B of the hollow shaft part 37 between both the oil paths.