SPOOL VALVE

摘要

A spool valve includes a valve housing and a spool. The valve housing includes a spool hole, a first oil passage, and a second oil passage. The first oil passage has a first port, a second port and a third port that are open to the spool hole. The second oil passage has a fourth port, a fifth port and a sixth port that are open to the spool hole. The spool includes a first oil groove, a second oil groove, a third oil groove, a fourth oil groove, a first communication passage, and a second communication passage. The spool is slidable in the spool hole to switch communication of the third oil groove with the second port and the third port and to switch communication of the fourth oil groove with the fifth port and the sixth port.

主权项

1. A spool valve comprising:
a valve housing comprising:
a spool hole;a first oil passage having a first port, a second port and a third port that are open to the spool hole; anda second oil passage having a fourth port, a fifth port and a sixth port that are open to the spool hole; a spool located in the spool hole to slide in an axial direction of the spool hole, the spool comprising;
a first oil groove located in an outer peripheral surface of the spool;a second oil groove located in the outer peripheral surface of the spool;a third oil groove located in the outer peripheral surface of the spool;a fourth oil groove located in the outer peripheral surface of the spool, the first oil groove, the second oil groove, the third oil groove and the fourth oil groove being circumferentially arranged at an identical position in the axial direction;a first communication passage penetrating through the spool from the first oil groove to the third oil groove; anda second communication passage penetrating through the spool from the second oil groove to the fourth oil groove, the first port of the first oil passage being provided to communicate with the first oil groove of the spool, the second port and the third port being provided to selectively communicate with the third oil groove of the spool, the fourth port of the second oil passage being provided to communicate with the second oil groove of the spool, the fifth port and the sixth port being provided to selectively communicate with the fourth oil groove of the spool, the spool being slidable in the spool hole to switch communication of the third oil groove with the second port and the third port and to switch communication of the fourth oil groove with the fifth port and the sixth port.