Hydraulic pump / motor with variable adjustment and a connecting oil path between a tapered roller bearing of a drive shaft and a bearing of an adjustable swash plate / swash plate

摘要

In order to perform reliable lubrication between protruding sliding portions of bearings and recessed sliding portions in a swash plate without a problem such as. B. to cause movement of the swash plate with respect to a housing, each of ball holders 50 has the protruding slide portion 52 at one end of a shaft portion 51, a through oil path 53 is formed extending from an outer surface of the shaft portion 51 to an outer peripheral surface of the protruding sliding portion 52, each of the ball retainers 50 is fitted at its shaft portion 51 in a mounting hole 11b in the housing 10, and is fitted at its protruding sliding portion 52 in the recessed sliding portion 32 in the swash plate 30 to slide in such a manner as to to cover an opening of the through oil path 53, a communication oil path 56 is formed between a housing space 21A for receiving a main body-side rolling bearing 21 and the mounting hole 11b, and a lubrication groove 54 for constantly connecting the opening of the through oil path 53 with an outside of a sliding contact area between the m projecting sliding portion 52 and the recessed sliding portion