| 主权项 |
1. A spool switching valve device, comprising:
a spool housing having a columnar shape, comprising hollow cavities which are drilled toward a center of the spool housing from axial ends along an axial direction, the axial direction being a longitudinal direction of the spool housing; and valve bodies having a spherical shape, which are respectively arranged within the hollow cavities, wherein the spool housing comprises:
first input port cavity portions, each of which is provided on an innermost side of each of the hollow cavities, and penetrates to a side surface of the spool housing to communicate with outside of the spool housing;valve body movable portions, each of which is provided adjacent to each of the first input port cavity portions of the hollow cavities, and accommodates each of the valve bodies to be movable in the axial direction;first valve seat portions, each of which is provided to each of boundary areas between the valve body movable portions and the first input port cavity portions, and at which each of paths between the valve body movable portions and the first input port cavity portions is opened and closed by each of the valve bodies; andvalve seat mounting portions, each of which is provided adjacent to each of the valve body movable portions at a foremost end of each of the hollow cavities, and is provided with a valve seat member including a second valve seat portion,each valve seat member has a tubular shape with a through hole at a center thereof and includes a second input port portion, which serves as a passage to the outside, disposed at an end portion of the through hole on an opposite side from the valve body movable portion, the second valve seat portion being provided to open and close a path between the valve body movable portion and the second input port portion, with the valve body being fitted into a valve body movable portion side of the through hole,each valve body movable portion comprises an output port which is provided at a center of a movable range of the valve body, and penetrates into the side surface of the spool housing to communicate with the outside of the spool housing,each valve seat mounting portion comprises an engagement receiving portion which suppresses detachment of the valve seat member when mounted to the valve seat member, andeach valve seat member comprises an engagement portion which is fitted into the engagement receiving portion when the valve seat member is mounted to the valve seat mounting portion. |
