JP2006046579A - Multiple type directional control valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a directional control valve in which man-hours required to process communicating grooves for making pilot flow channels communicate with the other flow channels is reduced to realize cost reduction. <P>SOLUTION: There is provided such a multiple type directional control valve as follows: a plurality of valve bodies 1 is connected; a spool is built in these valve bodies 1 in a freely slidable manner; flow channels of a pressurized fluid fed to an actuator and flow channels of a return fluid are switched depending on a switched position of the spool; pilot flow channels 7 for the other control valves are allowed to open and close and besides flow channel ends of the pilot flow channels 7 are opened in a mating face 2 of the valve body 1 and valve body 1; further, in the mating face of the valve bodies 1, the communicating grooves 9, 10 for making two pilot flow channels 7 communicate with the other flow channels are preliminarily die-formed integrally with the valve bodies 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a multiple directional control valve in which a pilot flow path is formed in a valve body.

  As this kind of directional control valve, one described in Patent Document 1 has been known. This conventional directional control valve has a spool slidably incorporated in its valve body. Then, the flow path of the pressure fluid supplied to the actuator and the flow path of the return fluid from the actuator are switched according to the switching position of the spool, and when the spool is switched as described above, The pilot channel is opened and closed. Further, a pilot flow path that is a flow path end of the pilot flow path is opened at the mating surface of the valve main body and the valve main body.

In this type of directional control valve, for example, the pilot flow path formed on the mating surface may have to communicate with another port formed on the mating surface. This is shown in FIG. In the directional control valve shown in FIG. 4, neutral flow paths 3, 4, a parallel path 5 and a check valve port 6 are opened on the mating surface 2 of the valve body 1. The end face of the pilot flow path 7 is opened on the mating surface 2 as described above. The pilot flow path 7 has a communication groove 8 for communicating the pilot flow path 7 with other flow paths. Communicating with The communication groove 8 is machined each time depending on the use of the direction control valve.
JP-A-5-098672

In the conventional multiple directional control valve as described above, since the communication groove 8 is machined each time in order to connect the pilot flow path to the other flow path, the processing man-hour increases. There was a problem that it was expensive.
An object of the present invention is to provide a directional control valve that reduces the number of processing steps of a communication groove for communicating a pilot flow path with another flow path, thereby reducing costs.

  In the present invention, a plurality of valve bodies are connected in series, and spools are slidably incorporated in these valve bodies, and the flow path of pressure fluid supplied to the actuator according to the switching position of the spool and the flow of return fluid from the actuator While switching the path, it is configured to open and close the pilot flow path for the other control valve, and the flow path end of the pilot flow path is opened on the mating surface of the valve body and the valve body Assumes a control valve. The mating surface of the valve main body is characterized in that a communication groove for communicating the pilot flow path with another flow path is previously molded integrally with the valve main body.

  According to the present invention, the communication groove for communicating the pilot flow path with the other flow path is pre-molded integrally with the valve main body on the mating surface of the valve main body, so that the number of processing steps for forming the communication groove is conventionally increased. It will decrease compared to. Therefore, the cost is reduced accordingly.

FIG. 1 shows the form of the communication groove, and the other configuration is the same as the conventional one. Therefore, the same components as those in the conventional art will be described with the same reference numerals, and detailed description thereof will be omitted.
A substantially triangular first communication groove 9 shown in FIG. 1 and a straight second communication groove 10 adjacent to the first communication groove 9 are formed on the mating surface 2 of the valve body 1. ing. The first and second communication grooves 9 and 10 are molded integrally with the valve body 1.

  Now, for example, when communicating the pilot flow path 7 shown in FIG. 1 with the flow path 11, the area 12 is cut out by machining, and the pilot flow path 7 is communicated with the second communication groove 10. And the area 13 between the 2nd communicating groove 10 and the flow path 11 is similarly cut out by machining, and both are connected. In this way, the number of parts that require machining is reduced, which leads to cost reduction.

Further, as shown in FIG. 2, when the pilot channel 7 is communicated with a channel 14 different from the above, the area 15 in FIG. 2 is cut out by machining so that the pilot channel 7 is formed into the first communication groove. 9 to communicate. And the area 16 between the 1st communicating groove | channel 9 and the flow path 14 is similarly cut out by machining, and both are connected. Accordingly, as in the above case, the number of parts that require machining is reduced, and the cost can be reduced accordingly.
FIG. 3 shows a case where the pilot flow path 7 is further communicated with another flow path. In any case, in this embodiment, the pilot flow path 7 is communicated with another flow path. Machining will be insignificant, and cost reduction can be achieved.

In this embodiment, the first communication groove 9 has a triangular shape and the second communication groove 10 has a straight line. However, depending on the application of the direction control valve, the shape and number of these communication grooves are changed each time. You may make it decide.
However, depending on the application of the directional control valve, the position of the port or flow path that opens in the mating surface 2 may be fixed to some extent. In such a case, if the communication groove is also patterned, the forming type of the valve body 1 can be unified, and further cost reduction is possible.

FIG. 3 is a layout diagram showing a communication state between a pilot channel 7 and a channel 11. FIG. 3 is a layout diagram showing a communication state between a pilot flow path 7 and a flow path 14. FIG. 5 is a layout diagram illustrating a situation in which another channel is connected to the pilot channel 7. It is the top view which showed the mating surface of the conventional multiple direction control valve.

Explanation of symbols

1 Valve body 2 Matching surface 7 Pilot flow path 9, 10 First and second communication grooves 11, 14 Flow path

Claims (2)

  A plurality of valve bodies are connected in series, and spools are slidably incorporated in these valve bodies, and the flow path of the pressure fluid supplied to the actuator and the flow path of the return fluid from the actuator are switched according to the switching position of the spool. In the multiple directional control valve configured to open and close the pilot flow path with respect to the other control valve, and on the mating surface of the valve body and the valve body, the flow path end of the pilot flow path is opened. A multi-directional directional control valve in which a communicating groove for communicating a pilot channel with another channel is molded in advance on the mating surface of the valve body integrally with the valve body.   The multi-directional directional control valve according to claim 1, wherein the communication groove is patterned.

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