FLUID PUMP

摘要

PURPOSE:To lubricate sufficiently between the rod guide section and the rod section by making a stepped hole and an oil hole in the bottom of housing body while forming the lower small diameter section of the stepped hole into an oil pump. CONSTITUTION:The outercircumference of the lower section of rod section 22a in an operating piston 20 is inserted rotatably into a receiving member 23 which is inserted into a bush 17b of a guide member 17 while a bottomed step hole 11g and an oil hole 11h are made in the bottom wall section 11f of the lower housing 11 to form the lower small diameter section 11g2 of the step hole 11g into an oil sump. Since oil in the oil sump is fed through up-down motion of an operating rod 22 between the innercircumference of bush 17b and the receiving member 23, lubrication between the guide member 17 and the receiving member 23 can be performed accurately resulting in effective prevension of abrasion and burning.