公开(公告)号：EP2101082A3

公开(公告)日：2009-10-14

申请号：EP09002781.4

申请日：2009-02-26

申请人： NTN Corporation

发明人： Goto, Shiro ,  Satomura, Aisaku

IPC分类号： F16H7/08 ,  F16H7/12

CPC分类号： F16H7/1236 ,  F16H2007/0806 ,  F16H2007/0859

摘要： A reservoir chamber (13) is defined between the cylinder (1) and the sleeve (4), and a check valve (15) is provided on the path (14) communicating the reservoir chamber (13) with the pressure chamber (6). The check valve (15) closes the path (14) when pushing force is applied and the cylinder (1) and the rod (5) retract relative to each other, and thus the pushing force is buffered by hydraulic oil in the pressure chamber (6). A communicating path (16) communicating the pressure chamber (6) with the reservoir chamber (13) is formed in the rod (5), and a relief valve (18) is mounted in the communicating path (16) to keep the upper limit of the pressure in the pressure chamber (6) constant so that excessive tension is not applied by the rod (5) to the belt (41). A throttle (34) is provided on the outlet side of hydraulic oil of the relief valve (18). This keeps pressure difference between inlet and outlet of the hydraulic oil small when relief valve (18) opens, and thus prevents vibration of a valve body (23) of the relief valve (18).

公开(公告)号：EP2101082A2

公开(公告)日：2009-09-16

申请号：EP09002781.4

申请日：2009-02-26

申请人： NTN Corporation

发明人： Goto, Shiro ,  Satomura, Aisaku

IPC分类号： F16H7/08

CPC分类号： F16H7/1236 ,  F16H2007/0806 ,  F16H2007/0859

摘要： A reservoir chamber (13) is defined between the cylinder (1) and the sleeve (4), and a check valve (15) is provided on the path (14) communicating the reservoir chamber (13) with the pressure chamber (6). The check valve (15) closes the path (14) when pushing force is applied and the cylinder (1) and the rod (5) retract relative to each other, and thus the pushing force is buffered by hydraulic oil in the pressure chamber (6). A communicating path (16) communicating the pressure chamber (6) with the reservoir chamber (13) is formed in the rod (5), and a relief valve (18) is mounted in the communicating path (16) to keep the upper limit of the pressure in the pressure chamber (6) constant so that excessive tension is not applied by the rod (5) to the belt (41). A throttle (34) is provided on the outlet side of hydraulic oil of the relief valve (18). This keeps pressure difference between inlet and outlet of the hydraulic oil small when relief valve (18) opens, and thus prevents vibration of a valve body (23) of the relief valve (18).

摘要翻译： 在气缸（1）和套管（4）之间限定一个储存室（13），并且在将储存室（13）与压力室（6）连通的路径（14）上设有止回阀（15） 。 当施加推力并且气缸（1）和杆（5）相对于彼此缩回时，止回阀（15）关闭路径（14），因此推压力被压力室中的液压油 6）。 在所述杆（5）中形成有连通所述压力室（6）与所述储存室（13）的连通路径（16），并且在所述连通路径（16）中安装有安全阀（18）以保持上限 压力室（6）中的压力恒定，使得杆（5）不会对带（41）施加过大的张力。 节流阀（34）设置在安全阀（18）的液压油的出口侧。 这样当安全阀（18）打开时，液压油的入口和出口之间的压力差小，从而防止安全阀（18）的阀体（23）的振动。