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1. 发明授权

US4272999A Fluid pressure operated actuator 失效
标题翻译：流体压力执行器
公开(公告)号：US4272999A
公开(公告)日：1981-06-16
申请号：US27595
申请日：1979-04-05
申请人： Forbes G. B. Perry
发明人： Forbes G. B. Perry
IPC分类号： F16H15/38 , F16H61/664 , F16H17/00 , F01B7/04
CPC分类号： F16H15/38 , F16H2015/383 , F16H61/6649
摘要： A piston-and-cylinder type actuator, for use particularly in steplessly-variable-ratio transmission units of the toroidal race rolling friction type. In such units the actuator may serve to thrust the input and output members and their intermediate rollers into engagement, so that drive will be transmitted. According to the invention enhanced thrust is obtained by interposing auxiliary pistons (6, 7) in the space between the main piston (1) and the end (4) of the cylinder (2). One of pistons 6, 7 is linked to the main piston 1 and the other to cylinder 2, and they divide the said space into two pressurized zones (16, 18) with a vented zone between them. Where the actuator has to rotate about the cylinder axis, unwanted centrifugal forces generated within zones 16, 18 may be diminished by forming the vented zone so that a quantity of fluid may accumulate in it. Centrifugal forces develop within this fluid too, and the vented and pressurized zones are put into communication in such a way that the centrifugal forces within the two zones are opposed and tend to cancel each other out.
摘要翻译：一种活塞和缸型致动器，特别用于环形滚道摩擦型的无级变速传动装置。在这种单元中，致动器可以用于将输入和输出构件及其中间辊推动成接合，使得传动将被传递。根据本发明，通过在主活塞（1）和气缸（2）的端部（4）之间的空间中插入辅助活塞（6,7）来获得增强的推力。活塞6,7中的一个连接到主活塞1，另一个连接到气缸2，并且它们将所述空间分成两个在它们之间的排气区的加压区域（16,18）。在致动器必须围绕气缸轴线旋转的情况下，通过形成通气区域使得在区域16,18内产生的不期望的离心力可能减少，使得一定量的流体可能积聚在其中。离心力也在该流体内产生，并且排气和加压区域以这样的方式进行连通，使得两个区域内的离心力相对并趋于彼此抵消。

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