JPH0625678U - Manifold type valve device - Google Patents

Abstract

(57) [Abstract] [Purpose] A pilot operated switching valve is stacked on the manifold and the pilot solenoid valve that operates the switching valve is designed so that its solenoid protrudes outward from the end face of the manifold in the width direction. The widthwise dimension of the hydraulic manifold type valve device installed in the manifold is reduced. [Structure] A ridge 2 is provided on the upper part of the manifold 1 so as to have a convex shape in a cross section orthogonal to the longitudinal direction, and a spool valve element 19 of pilot solenoid valves 17R and 17L is accommodated and installed in the ridge 2. With the solenoid 22
Is installed so as to project from the end surfaces 2R, 2L of the raised portion, and the spool valve element 19 has two lands 35, 3 which are separated in the axial direction.
It is supposed to be guided by 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a manifold type valve device in which pilot-operated switching valves are stacked and installed in a stacking portion provided in a manifold, and a pilot solenoid valve for operating the switching valve is separately installed in the manifold.

[0002]

[Prior art]

 As a manifold type valve device of this type, there is one described in Japanese Patent Application Laid-Open No. 1-307582 as a first embodiment. In other words, pilot operated switching valves are stacked and installed in the stacking part that is formed on the upper surface of the manifold in the longitudinal direction, and the solenoid of the pilot solenoid valve is installed so as to project outward from both end surfaces of the manifold. At the same time, the spool valve element of the pilot solenoid valve operated by this solenoid is installed inside the manifold coaxially with the solenoid.

[0003]

[Problems to be solved by the device]

 However, in this type, the cross-sectional shape orthogonal to the longitudinal direction of the manifold is rectangular, and the solenoid is installed so as to project outward in the width direction from the end face of the manifold, which causes a problem of an increase in the width direction. There was a point. The present invention is intended to realize a manifold type valve device in which the widthwise dimension is kept small.

[0004]

[Means for Solving the Problems]

 Therefore, according to the present invention, the supply passage and the return passage are provided on the upper surface of the manifold provided with the supply passage connected to the hydraulic pressure source and the return passage connected to the tank in the longitudinal direction. A plurality of laminated parts with open supply and return passages to be connected are provided in the longitudinal direction, and pilot-operated switching valves are stacked on each laminated part, and the solenoid of the pilot solenoid valve that operates these switching valves is installed. The manifold is installed so that it protrudes outward from the end face along the longitudinal direction of the manifold, and the spool valve element of the solenoid operated pilot solenoid valve is housed in the valve hole that is coaxial with the solenoid. In the shaped valve device, the manifold is provided with a ridge extending in the longitudinal direction in the upper part such that the cross-sectional shape orthogonal to the longitudinal direction has a convex shape, and the upper surface of the ridge is provided. The laminated part is formed, the solenoid of the pilot solenoid valve is installed so as to project from the end face along the longitudinal direction of the ridge, and the valve hole for accommodating the pilot solenoid valve is provided in the ridge, and the switching valve operates in the valve hole. And a pilot supply passage through which pilot oil is supplied are connected to each other with the pilot output passage inward, and are axially separated from each other. It forms a spring chamber in which a spring that pushes outward is formed, and the spool valve element is slidably guided in the valve hole by two lands that are axially separated from each other, and the spool valve element is inserted between the two lands in the valve hole. Creates an inlet chamber that communicates with the pilot supply passage, and a land inside the spool valve body forms a switching land that connects the pilot output passage to the inlet chamber and the spring chamber. A passage hole for providing the manifold connects the spring chamber through the passage hole in the return path.

[0005]

[Action]

 According to the present invention having such a configuration, the raised portion provided so as to project the solenoid of the pilot solenoid valve outward from the end face along the longitudinal direction has a convex shape in a cross section orthogonal to the longitudinal direction on the upper portion of the manifold. Since the solenoid is formed as described above and the width dimension is reduced, the overall dimension in the width direction can be kept small even if the solenoid projects outward in the width direction.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 is a manifold, and a ridge 2 is formed along the longitudinal direction on the upper part of the manifold, so that a cross-sectional shape orthogonal to the longitudinal direction is formed in a convex shape together with the wide portion 3 on the lower part. ing. The ridge 2 extends from the left end to the front of the right end in the longitudinal direction as shown in FIG. 1, and the ridge 2 is not formed at the right end in the longitudinal direction of FIG. 1 of the manifold 1. The terminal box 4 is placed.

In the manifold 1, a wide portion 3 is provided with a supply passage 5 connected to a hydraulic source (not shown) and a return passage 6 connected to a tank. , Two pilot supply passages 7R and 7L branched from the supply passage 5 are formed to extend in the longitudinal direction. Reference numeral 8 denotes three laminated portions formed on the upper surface 2A of the raised portion 2 so as to be separated from each other in the longitudinal direction. Pilot-operated switching valves 9 and 10 are respectively laminated and installed in each laminated portion 8, and the switching valve 10 A stack valve 12 having a pressure reducing valve 11 is stacked between the stacking portion 8 and the stacking portion 8, and the switching valve 9 is a detent type two-position valve and the switching valve 10 is a spring type three-position valve. It is a position valve.

When stacking the stacking valve 12 on each stacking portion 8, the stacking valve 12 is passed through the stacking valve 12, and the supply passages P and output passages A and B of the switching valves 9 and 10 installed in stacking on the stacking portion 8 are stacked. , The return passages RR and RL, the pilot passages PTR and PTL, the supply passages 13 and the output passages 14A and 14B, the return passages 15R and 15L and the pilot output passages 16R and 16L, and the four mounting screw holes 8A. It is opened and is bored in the manifold 1. The output passages 14A and 14B are open at the other end on the end face 3R along the longitudinal direction of the wide portion 3 of the manifold 1 so as to be connected to a hydraulic actuator (not shown), and the return passage 15R is also formed. , 15L merge with each other inside the manifold 1 and are connected to the return path 6 as shown in FIG.

Reference numerals 17R and 17L are pilot solenoid valves installed in the manifold 1 one for each laminated portion 8. That is, referring to FIG. 3, in the raised portion 2 of the manifold 1, stepped installation holes 18R, 18L are formed horizontally from the end faces 2R, 2L along the longitudinal direction thereof, and the installation holes 18R, Inside the 18L, sleeves 21 each having a valve hole 20 for slidably accommodating the spool valve body 19 are inserted and installed.

Reference numeral 22 denotes a solenoid, and a fixed iron core 23 thereof is screwed into the openings of the respective installation holes 18R and 18L so as to project coaxially with the spool valve body 19 and outward from the end faces 2R and 2L. It is installed as Each solenoid 22 has a coil 24 and a yoke 25, and a movable iron core 27 that is attracted to the fixed iron core 23 by energizing the coil 24 in a cylindrical body 26 connected to the fixed iron core 23. A so-called oil-immersed type in which a push rod 28 that pushes and moves the spool valve body 19 inward by suction of the iron core 27 is inserted into the fixed iron core 23. And is inserted into each valve hole 20.

Each sleeve 21 has passages 29 and 30 that pass through the inside and outside at two axially spaced locations, and the pilot output passages 16R and 16L have the passages 29 on the inside in each sleeve 21. Each of them is connected to the valve hole 20 via. 31R and 31L are pilot supply passages that branch from the pilot supply passages 7R and 7L to guide the pilot oil, respectively. The pilot supply passages 31R and 31L are provided through the outer passage portions 30 of the sleeves 21 and the valves respectively. It is connected to the hole 20.

A spring chamber 32 is formed between the spool valve element 19 and the inner portion of each valve hole 20, and a spring 33 for pressing the spool valve element 19 outward is formed in each spring chamber 32. Passage holes 34R and 34L, which are respectively installed and connect the spring chamber 32 to the return passages 15R and 15L, respectively, are opened in the inner rear end walls of the installation holes 18R and 18L.

Each spool valve element 19 is slidably guided in each valve hole 20 by two lands 35 and 36 which are separated from each other, and a pilot portion supply passage 31R is always provided between these lands 35 and 36 via a passage portion 30. , 31L communicating with the inlet chamber 37, and the land 35 on the inner side of the inlet chamber 37 forms a passage at the normal position where the spool valve body 19 reaches the outward moving end by the spring force of the spring 33 as shown in FIG. A switching land for communicating the passage portion 29 with the inlet chamber 37 is formed in the operating position where the portion 29 is communicated with the spring chamber 32 and the spool valve body 19 is moved inward by the movable iron core 27 of the solenoid 22. Further, reference numeral 38 is a through hole provided so that both ends of the spool valve body 19 communicate with each other.

Reference numerals 39R and 39L denote wiring ducts attached to the respective end surfaces 2R and 2L of the raised portion 2, which house the power supply lines of the solenoids 22 and lead them to the terminal box 4.

Next, the operation of this embodiment will be described. Now, the output passages 14A, 14B in each stacking portion 8 are connected to a hydraulic actuator (not shown) by the opening in the end face 3R, the pilot solenoid valves 17R, 17L are all in the normal position, and the switching valve 9 is right as shown in FIG. It is assumed that the switching valve 10 in the position is in the neutral position. At this time, in the stacking portion 8 in which the switching valves 9 are stacked, the output passage 14B is connected to the supply passage 5 via the supply passage 13 and receives the supply of pressure oil, and the output passage 14A is connected to the return passage 6 via the return passage 15R. Thus, the output passages 14A and 14B in the laminated portion 8 in which the switching valves 10 are laminated are in the closed state.

When the pilot solenoid valve 17L is switched to the operating position in the laminated portion 8 where the switching valves 9 are laminated, the switching valve 9 is moved to the left position by the pilot oil guided to the pilot output passage 16L through the pilot supply passage 31R. The output passage 14A is connected to the supply passage 5 via the supply passage 13 to receive the pressure oil, and the output passage 14B is connected to the return passage 6 via the return passage 15L to be in the discharge state. Although the pilot solenoid valve 17L is switched back to the normal position, the switching valve 9 holds the left position by the detent mechanism. When the pilot solenoid valve 17R is switched to the operating position in this state, the pilot oil guided to the pilot output passage 16R switches the switching valve 9 to the right position as shown in FIG. 2, and the pilot solenoid valve 17R is returned to the normal position. In all cases, the switching valve 9 holds the right switching position by the detent mechanism.

In the laminated portion 8 in which the switching valve 10 is laminated, the state shown in FIG. 2 is changed to the right position when the pilot solenoid valve 17R is switched to the operating position, and the pilot solenoid valve 17L is switched to the operating position. The switching valve 10 is switched to the left position by the pilot oil guided to the pilot output passages 16R and 16L, respectively. When both pilot solenoid valves 16R and 16L are set to the normal position, the switching valve 10 returns to the neutral position as shown in FIG. . At the right position of the switching valve 10, the output passage 14A is connected to the return passage 6 via the return passage 15R to be in the discharge state, and the output passage 14B is connected to the supply passage 5 via the supply passage 13 to supply the pressure oil. At the left position of the switching valve 10, the output passage 14A is connected to the supply passage 5 via the supply passage 13 to receive the supply of pressure oil, and the output passage 14B is connected to the return passage via the return passage 15L. It becomes the discharge state.

With this operation, the passage holes 34R, 34L in the pilot solenoid valves 17R, 17L are connected to the common return passage 6 together with the return passages 15R, 15L for the respective switching valves 9, 10. For example, when the switching valve 10 is switched from the neutral position to the right position or the left position, when the amount of oil discharged to the return passage 6 increases, a slight pressure increase in the return passage 6 that occurs in a surge form occurs. It is transmitted to each spring chamber 32 through the passage holes 34R and 34L. Although each spool valve element 19 is provided with a through hole 38, it is unavoidable that the spool valve element 19 is pressed outward under such a surge pressure, but each spool valve element 19 is Does not move to the operating position because it is at the end of the outward movement at the normal position, and at the operating position it moves to the normal position because it is held at the operating position by the suction force acting on the movable iron core 27 of the solenoid 22. However, the surge pressure generated in the return path 6 prevents the switching valves 9 and 10 from malfunctioning.

The solenoid valves 22 of the pilot solenoid valves 17R and 17L are installed so as to project outward in the width direction from the end faces 2R and 2L of the ridge 2, but the ridge 2 is the length of the manifold 1. Since the cross-sectional shape orthogonal to the direction is formed in a convex shape to reduce the width dimension, it is possible to prevent the dimension in the width direction from increasing. Furthermore, since the pilot solenoid valves 17R and 17L are guided within the valve hole 20 of the spool valve body 19 only by the two lands 35 and 36, the total length of the spool valve body 19 can be shortened and the ridge portion with a small width dimension can be shortened. It can be installed in 2 without any problems.

[0020]

As described above, according to the present invention, the ridge portion of the manifold installed so that the solenoid of the pilot solenoid valve projects outward from the end face along the longitudinal direction has a convex cross-sectional shape that is orthogonal to the longitudinal direction. Since the width of the manifold is raised so as to have a letter-like shape so as to have a small width, even if the solenoid projects outward in the width direction, the overall size in the width direction can be kept small. Also, the spool valve element of the pilot solenoid valve is guided by only two lands in the valve hole, so the total length can be shortened and it can be accommodated in the small ridge with a convex width protruding above the manifold without any problem. Can be installed.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a hydraulic circuit diagram showing an embodiment of the present invention partially omitted.

FIG. 3 shows a manifold according to an embodiment of the present invention.
The figure shown by the partial cross section which follows the AA line.

FIG. 4 is an enlarged partial plan view of a manifold according to an embodiment of the present invention.

[Explanation of symbols]

 1 Manifold 2 Raised part 2R, 2L End face 5 Supply path 6 Return path 8 Laminated part 9, 10 Switching valve 13 Supply path 15R, 15L Return path 16R, 16L Pilot output path 17R, 17L Pilot solenoid valve 19 Spool valve body 20 Valve hole 22 solenoid 31R, 31L pilot supply passage 32 spring chamber 33 spring 34R, 34L passage hole 35, 36 land 37 inlet chamber

Claims (1)

[Scope of utility model registration request] 1. A supply passage connected to a supply passage and a return passage on the upper surface of a manifold which extends in the longitudinal direction and has a supply passage connected to a hydraulic source and a return passage connected to a tank. , A plurality of laminated parts with open return passages are provided in the longitudinal direction, and pilot operated switching valves are laminated on each laminated part, and the solenoid of the pilot solenoid valve that operates this switching valve is installed in the longitudinal direction of the manifold. In the manifold type valve device, which is installed so as to project outward from the end face along with it, and the spool valve body of the solenoid operated pilot solenoid valve is housed in the valve hole provided coaxially with the solenoid in the manifold, Is provided with a ridge extending in the longitudinal direction at the top so that the cross-sectional shape orthogonal to the length is convex, and each laminated portion is formed on the upper surface of the ridge. The solenoid of the pilot solenoid valve is installed so as to project from the end face along the longitudinal direction of the raised portion, and a valve hole for accommodating the pilot solenoid valve is provided in the raised portion, and the pilot hole for operating the switching valve is provided in the valve hole. The output passage and the pilot supply passage, to which pilot oil is supplied, are connected with the pilot output passage inward so as to be separated in the axial direction. The spool valve body is slidably guided in the valve hole by the two lands that are axially separated from each other and communicates with the pilot supply passage between the two lands in the valve hole. Of the spool valve body, a land for switching the pilot output passage between the inlet chamber and the spring chamber is formed by a land inside the spool valve body, and a passage hole connected to the back of the valve hole is formed. Provided Rudo, manifold shapes valve apparatus formed by connecting the spring chamber through the passage hole in the return path.