公开(公告)号：US09200708B2

公开(公告)日：2015-12-01

申请号：US13776769

申请日：2013-02-26

申请人： Caterpillar Inc.

发明人： Dinesh Desai ,  Chris Buckley ,  Brian Sybrandy

IPC分类号： F16J1/00 ,  F16J1/08

CPC分类号： F16J1/005 ,  F16J1/08 ,  Y10T29/49256

摘要： An apparatus and method for coupling a piston to a rod to form a cylinder assembly are provided. The piston has a tapped bore extending therethrough for coupling to a first threaded region of the rod. The rod end extends beyond the piston member and includes a second threaded region for coupling to a tapped bore of a retaining member. The piston member is coupled to the rod member at a low torque, e.g., up to about 1000 Nm. An external thread of each of the threaded segment of the piston bore and the first threaded region of the first portion of the rod member may be formed with a root radius of greater than 0.125 pitch or with MJ class thread. The retaining member may include setscrews offset from one another for frictional engagement with the rod end. The thread pitch between the rod and the piston may be coarser than between the rod and the retaining member. An interface and a seal region between the rod and the piston may be disposed closer to the rod end side of the piston member than the threaded coupling.

摘要翻译： 提供了一种用于将活塞联接到杆以形成气缸组件的装置和方法。 活塞具有穿过其延伸的螺纹孔，用于联接到杆的第一螺纹区域。 杆端延伸超过活塞构件并且包括用于联接到保持构件的螺纹孔的第二螺纹区域。 活塞构件以低扭矩（例如高达约1000Nm）联接到杆构件。 活塞孔的每个螺纹段的外螺纹和杆构件的第一部分的第一螺纹区域可以形成为具有大于0.125节距的根半径或与MJ级螺纹形成。 保持构件可以包括彼此偏置的固定螺丝，用于与杆端部摩擦接合。 杆和活塞之间的螺距可以比杆和保持构件之间的螺距更粗。 杆和活塞之间的界面和密封区域可以比螺纹联接件更靠近活塞构件的杆端侧设置。