公开(公告)号：US5979295A

公开(公告)日：1999-11-09

申请号：US57438

申请日：1998-04-09

申请人： Richard Larker ,  Bengt Liljedahl ,  Torsten Svensson

发明人： Richard Larker ,  Bengt Liljedahl ,  Torsten Svensson

IPC分类号： F01B13/06 ,  F03C20060101 ,  F03C1/04 ,  F04B1/04 ,  F04B53/14

CPC分类号： F03C1/0472 ,  F03C1/0476

摘要： The present invention relates to a piston intended for a hydraulic radial piston motor and being of the type comprising an outer cam ring having an undulated inner cam surface, an inner cylinder block which is rotatable relative to the cam ring and has radially outwardly directed cylinders, a plurality of such pistons which move in said cylinders and cam rolls which rollingly run against the cam surface and are slidingly arranged against the respective pistons. The piston has an essentially cylindrical circumferential surface, an inner end surface and an opposite outer end surface, which is adapted to be slidingly arranged against the cam roll and therefore is formed with a groove-like recess, which in cross-section is essentially part-cylindrical, and with two lateral portions which extend around and partly surround the circumferential surface of the cam roll and via which reaction forces in the tangential direction of the cylinder block are transmitted between the cam roll and the cylinder block. The lateral portions of the piston are designed as separate parts, which are movable in the longitudinal direction of the piston at least in a limited manner.

摘要翻译： 本发明涉及一种用于液压径向活塞马达的活塞，其类型包括具有凹凸内凸轮表面的外凸轮环，内筒体可相对于凸轮环旋转并具有径向向外定向的气缸， 多个这样的活塞，其在所述气缸和凸轮辊中移动，滚动件相对于凸轮表面滚动并且相对于相应的活塞滑动布置。 活塞具有基本上圆柱形的周向表面，内端表面和相对的外端表面，其适于滑动地抵靠凸轮辊布置，因此形成有凹槽状凹部，其横截面基本上是部分 并且具有两个横向部分，两个侧部部分围绕凸轮辊的圆周表面延伸并且部分地围绕凸轮辊的圆周表面，并且通过其在气缸体的切线方向上的反作用力在凸轮辊和气缸体之间传递。 活塞的侧部被设计为分开的部件，其可以至少以有限的方式在活塞的纵向方向上移动。