公开(公告)号：US4951552A

公开(公告)日：1990-08-28

申请号：US441872

申请日：1989-11-27

申请人： Anton F. Fox

发明人： Anton F. Fox

IPC分类号： F15B15/26

CPC分类号： F15B15/261

摘要： A hydraulic actuator including an actuator cylinder and a ram slidable therein from a retracted position to an extended position. This ram has an axially extending chamber positioned in an end section and a number of ball passageways extend between this chamber and the outer surface of the ram. A locking ball is positioned in each passageway. A ring is slidably mounted on the ram and is positioned at its forwardmost point of travel to hold the balls so that they do not project from the passageways. A spring biases the ring towards its forwardmost position. A ball moving spool is slidably mounted in the chamber and has an annular ball receiving recess. A stop is located in an end section of the cylinder for preventing further forward movement of the ring and this stop causes the ring to slide rearwardly relative to the ram upon further extension of the latter.

摘要翻译： 液压致动器包括致动器气缸和从缩回位置滑动到延伸位置的压头。 该冲头具有位于端部部分中的轴向延伸的腔室，并且多个球通道在该腔室和压头的外表面之间延伸。 锁定球位于每个通道中。 环可滑动地安装在压头上，并且位于其最前端的行进位置以保持球，使得它们不从通道突出。 弹簧将环朝向其最前端的位置偏置。 球形移动线轴可滑动地安装在腔室中并且具有环形球容纳凹部。 止动件位于气缸的端部，用于防止环的进一步向前移动，并且该止动件使得环在其后延伸时相对于冲头向后滑动。