JPH0610678U - Solenoid type directional valve - Google Patents

Abstract

(57) [Abstract] [Purpose] In an electromagnetic directional control valve having two plungers, the lateral width is narrowed and the balance of a manual operation mechanism is improved. [Structure] The manual pin chamber 29 is set in a line in the length direction of the main body between the main shaft portion 1 and the solenoid portion 2, and the first pin 24a and the second cam 24b are set in the manual pin chamber 29.
Is rotatably provided with a manual pin 23 formed near the first plunger 13a and the second plunger 13b, respectively, and the spacers 27a and 27b are respectively moved by the cam action of the first cam 24a and the second cam 24b. The valve bodies 18a and 18b for pilot valves provided on the first plunger 13a and the second plunger 13b are displaced through the above.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electromagnetic directional control valve, and more particularly to a technique effectively applied to a manual operation mechanism of an electromagnetic directional control valve.

[0002]

[Prior art]

 If a lever for displacing the valve elements for the two pilot valves is provided as a manual operation mechanism for the double solenoid type electromagnetic directional control valve, both of them will be adjusted due to erroneous operation while they are in the locked position. There is a risk of going. This causes a malfunction of the electromagnetic directional control valve, so it is necessary to prevent such a malfunction.

Conventionally, as a technique for this, a single manual pin having two cams having different cam functions is provided near the center of the main body in the longitudinal direction in the vicinity of the valve body for the pilot valve and the plunger. It is known that the valve element is provided near the side surface, and the valve action for the pilot valve interlocking with the plunger is alternately displaced by the cam action by the rotation of the manual pin to alternately open and close the valve hole. (Japanese Utility Model Publication No. 1-168079, Japanese Utility Model Publication No. 2-116081)

[0004]

[Problems to be solved by the device]

 However, in this conventional electromagnetic directional control valve, the main shaft portion and the plunger portion are provided in a line in the length direction of the main body, and the manual pin is located closer to the side surface, so the width of the main body becomes wider. A plurality of electromagnetic directional control valves may be used side by side, and in such a usage mode, it is desirable that the electromagnetic directional control valve be as narrow as possible.

Further, if the cam action of the manual pin can be made to act linearly on the plunger through the spacer, the balance of the manual operation mechanism will be better, but the structure in which the manual pin is provided near the side surface as in the conventional technique. Then this is difficult.

Further, due to the axial accumulation tolerance of the electromagnetic directional control valve, the plunger displaced by the cam action of the manual pin may collide with the column before reaching the top dead center of the cam. However, in this case, there is a disadvantage that the manual pin cannot be rotated any more.

Therefore, an object of the present invention is to provide a narrower electromagnetic type directional control valve while maintaining the function of alternately displacing the valve elements for pilot valves by the cam action of one manual pin. To provide the technology that can be.

Further, another object of the present invention is to provide a technique capable of linearly operating the cam action of the manual pin on the plunger, and also to provide an axial integration tolerance of the electromagnetic directional control valve. It is to provide a technology capable of absorbing the.

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

[0010]

[Means for Solving the Problems]

 The typical ones of the inventions disclosed in the present application will be outlined as follows.

That is, a manual pin chamber is provided in the central portion in the width direction between the main shaft portion and the solenoid portion, and the manual pin is mounted rotatably by forming a cam in the vicinity of the plunger. It is an electromagnetic directional control valve that displaces the valve element for pilot valve provided on the plunger through the spacer by the cam action of the rotation of the valve. This is an electromagnetic directional control valve that circulates through the valve hole to be opened and closed, and the valve hole for the pilot valve is opened and closed alternately by the cam action of the rotation of the manual pin.

Further, the cam formed on the manual pin has a cam profile in which the outer peripheral surface of the manual pin is cut out to form a flat portion in the same direction, and spacers are provided in opposite directions to the cam, respectively. It is an electromagnetic type directional control valve.

Further, the cam is composed of a cam profile in which protrusions are provided on a part of a cylindrical portion in different directions, and a spacer is provided in the same direction with respect to the cam. It is a valve.

The spacer is an electromagnetic directional control valve whose spacer is made of an elastic material.

[0015]

[Action]

 According to the electromagnetic directional control valve configured as described above, the manual pin chambers accommodating the manual pins are provided in a row in the length direction of the main shaft part and the plunger part and the main body, so The width of the main body can be reduced as compared with the case where it is provided.

Further, since the cam is formed in the vicinity of the plunger of the manual pin, the cam action of rotating the manual pin acts on the plunger linearly via the spacer, so that the balance of the manual operation mechanism itself is improved.

Furthermore, when the spacer is made of an elastic body, the elastic body absorbs the axial accumulation tolerance, so that the valve element for the pilot valve can be smoothly displaced by the manual pin.

[0018]

Embodiment 1 FIG. 1 is a sectional view of an electromagnetic directional control valve showing an embodiment of the present invention, FIG. 2 is a sectional view showing the direction switching action of the electromagnetic directional control valve, FIG. 3, FIG. FIG. 5 is an explanatory view showing an operating state of the manual pin of the electromagnetic direction switching valve, and FIG. 6 is a perspective view of the manual pin.

First, the configuration of the electromagnetic directional control valve in this embodiment will be described.

The electromagnetic directional control valve of this embodiment comprises a main shaft portion 1 and a solenoid portion 2. The main shaft portion 1 will be described first, and then the solenoid portion 2 will be described.

A main shaft 3 is housed in the main shaft portion 1 so as to be movable in the axial direction, and lip seals 4 are attached to, for example, four locations around the main shaft. A first piston 5 and a second piston 6 are provided at both ends of the main shaft 3, and the pistons 5, 6 slide in the main shaft 3 direction by pressurization of pressure chambers 7, 8 to move the main shaft 3 to the right or It is designed to be displaced to either the left side.

In addition, an input port 9, a pair of output ports 10a and 10b, and a pair of exhaust ports 11a and 11b are opened in the main shaft portion 1, and each port is a single main shaft storage portion. Due to the displacement of the main shaft 3, the lip seal 4 provided around the main shaft 3 partitions the predetermined ports from each other, thereby forming a fluid flow path from the input port 9.

Next, in the solenoid part 2, the plungers 13a and 13b and the columns 14a and 14b are provided in series inside the pair of solenoids 12a and 12b with a slight gap. That is, since the plungers 13a, 13b are attracted to the columns 14a, 14b when the solenoids 12a, 12b are excited, the flanges 15a, 15b are provided with springs 16a, 16b so that a constant interval can be obtained during demagnetization. 16a and 16b simultaneously press the plungers 13a and 13b against the supply valve seats 17a and 17b.

The plungers 13a, 13b are provided with valve bodies 18a, 18b for pilot valves at their pressing portions against the supply valve seats 17a, 17b. When the solenoids 12a, 12b are degaussed, the supply valve seat 17a is closed. , 17b, the valve holes 19a and 19b are closed.

Pins 20a, 20b are provided adjacent to the supply valve seats 17a, 17b and are normally pushed by the flanges 15a, 15b of the plungers 13a, 13b to spread the flappers 21a, 21b. The fluid in the pressurizing chambers 7 and 8 is discharged to the outside from the valve holes 21c and 21d through the pressure releasing holes 22.

Here, a manual pin chamber 29 is provided in the central portion in the width direction between the main shaft portion 1 and the solenoid portion 2 so as to form a line in the longitudinal direction of the main shaft portion 1 and the solenoid portion 2. Further, the manual pin 23 is rotatably housed with one end thereof facing the outside. The manual pin 23 is provided at a right angle to the pair of plungers 13a and 13b, and the first cam having a cam profile in which the outer peripheral surface is cut out and a flat portion is provided near the plungers 13a and 13b of the manual pin. 24a and the second cam 24b are formed in the same direction.

The protrusion 25 of the manual pin 23 is provided with a groove 25c for rotating the manual pin 23 with a tool (not shown), and on the opposite side thereof, the manual pin 23 is moved to a predetermined position by a spring action. A spring 26 is provided for installation.

Further, it penetrates through the holes formed at the ends of the supply valve seats 17a and 17b, and is sandwiched between the cams 24a and 24b of the manual pin 23 and the flanges 15a and 15b of the plungers 13a and 13b, for example, by an elastic body. The substantially L-shaped spacers 27a and 27b are provided in opposite directions. The spacers 27a and 27b displace the plungers 13a and 13b against the pressing force of the springs 16a and 16b by the action of the cams 24a and 24b by rotating the manual pin 23 to open the valve holes 19a and 19b. It has become so.

Next, the operation of the electromagnetic directional control valve in this embodiment will be described separately for the first and second directional control functions.

First, the first direction switching action is as shown in FIGS. 2 and 4, FIG. 2 is a cross-sectional view showing its operating state, and FIG. 4 shows the manual pin 23 at that time. FIG. 6 is an explanatory diagram showing an operating state of FIG.

That is, when the manual pin 23 is rotated clockwise, only the first cam 24a acts on the spacer 27a, thereby locking the first plunger 13a, and as a result, the first plunger 27a is locked. The first valve hole 19a closed by the provided valve body 18a for the pilot valve is opened. At the same time, the pin 20a pushed by the flange 15a of the first plunger 13a is pushed back by the flapper 21a to close the valve hole 21c.

When a fluid flows in from the input port 9 in this state, the fluid pressurizes the pressure chamber 7 from the passage 28a through the manual pin chamber 29 and the first valve hole 19a. As a result, the first piston 5 slides to displace the main shaft 3, and the lip seal 4 provided on the main shaft 3 causes a gap between the input port 9 and the output port 10b, and between the output port 10a and the exhaust port 11a. Seal between the spaces.

Therefore, the fluid flowing in from the input port 9 is guided from the output port 10a to the driven system (not shown) to drive it, returns to the output port 10b, and is discharged from the exhaust port 11b.

Contrary to the first direction switching action, the second direction switching action means a state in which the second valve hole 19b is opened, and FIG. 5 shows the operating state of the manual pin 23 at that time. FIG.

That is, when the manual pin 23 is rotated in the counterclockwise direction, only the second cam 24b acts on the spacer 27b to lock the second plunger 13b, which causes the valve for the pilot valve to operate. The second valve hole 19b closed by the body 18b is opened, and at the same time, the pin 20b is pushed back by the flapper 21b, so that the valve hole 21d is closed.

When the fluid flows in from the input port 9, the fluid pressurizes the pressure chamber 8 from the passage 28a through the manual pin chamber 29, the second valve hole 19b and the passage 28b.

As a result, the second piston 6 slides to displace the main shaft 3, and the lip seal 4 seals between the input port 9 and the output port 10a and between the output port 10b and the exhaust port 11b. .

Therefore, the fluid flowing in from the input port 9 drives the driven system (not shown) from the output port 10b, returns to the output port 10a, and is discharged from the exhaust port 11a.

As described above, in the electromagnetic directional control valve of this embodiment, the manual pin 23 is rotated to cause the cam action of the first cam 24a and the cam action of the second cam 24b to cause the plunger 13a to move. , 13b are provided to alternately displace the pilot valve valve elements 18a and 18b, thereby opening and closing the first valve hole 19a and the second valve hole 19b.

Here, as described above, the manual pin chamber 29 is provided so as to form a line in the longitudinal direction of the main shaft portion 1, the solenoid portion 2, and the main body to form a fluid flow path, and the manual pin chamber 29 is manually operated. Since the pin 23 is housed, the width of the main body can be narrowed as compared with the case where the manual pin 23 is provided near the side surface of the main body.

Further, since the manual pin chamber 29 is provided in the center portion in the width direction between the main shaft portion 1 and the solenoid portion 2 and the manual pin 23 is housed therein, the manual pin 23 is located in the vicinity of the plungers 13a, 13b. The cam action of the cams 24a and 24b formed in the above can linearly act on the plungers 13a and 13b via the spacers 27a and 27b to displace them.

According to the cam contours of the cams 24a and 24b in this embodiment, the plungers 13a and 13b are in the locked state because the spacers 27a and 27b contact the outer peripheral surfaces of the cams 24a and 24b. This is a wide range of about half a rotation of the manual pin 23, so that the locked state of the plungers 13a and 13b can be stably maintained without being affected by vibration or the like.

Further, when the spacers 27a and 27b are made of elastic bodies, the spacers 27a and 27b can absorb the stacking tolerance in the axial direction.

[0044]

Embodiment 2 FIG. 7 is a sectional view of an electromagnetic directional control valve showing another embodiment of the present invention, and FIG. 8 is a sectional view showing the directional switching action of the electromagnetic directional control valve, FIG. 9, and FIG. 10 and 11 are explanatory views showing the operating state of the manual pin of the electromagnetic directional control valve, and FIG. 12 is a perspective view of the manual pin.

The electromagnetic directional control valve of this embodiment is different from the electromagnetic directional control valve of the first embodiment described above in the structure of the cam and the shape of the spacer.

That is, the manual pin 23 in the electromagnetic directional control valve of the present embodiment is different from the first cam 24c and the second cam 24d having a cam profile in which a columnar portion is provided with a protrusion. It is formed in the direction.

Further, the spacers 27c and 27d have a substantially U-shape, and surround the cams 24c and 24d from the same direction.

Also in the electromagnetic directional control valve of this embodiment, when the manual pin 23 is rotated clockwise from the neutral state of FIG. 9 to the clockwise direction of FIG. 10, only the first cam 24c acts as the spacer 27c. The plunger 13a of is locked.

As a result, when the fluid flows in from the input port 9, the first piston 5 slides and the lip seal provided on the main shaft 3 as in the first direction switching operation of the first embodiment. 4 seals between the input port 9 and the output port 10b, and between the output port 10a and the exhaust port 11a, the inflowing fluid drives a driven system (not shown) from the output port 10a, It returns to the output port 10b and is discharged from the exhaust port 11b.

Further, when the manual pin 23 is rotated counterclockwise as shown in FIG. 11, only the second cam 24d acts on the spacer 27d, and the second plunger 13b is locked.

Therefore, also in this case, similarly to the second direction switching action of the first embodiment, the fluid flowing from the input port 9 displaces the main shaft 3, and the lip seal 4 causes the input port 9 and the output port 10a to move. By sealing between the output port 10b and the exhaust port 11b, the inflowing fluid drives the driven system (not shown) from the output port 10b, returns to the output port 10a, and returns to the exhaust port 11a. More discharged.

That is, also in the electromagnetic directional control valve of this embodiment, the cam action of the first cam 24c and the cam action of the second cam 24d by rotating the manual pin 23 cause the plungers 13a, The valve bodies 18a and 18b for pilot valves provided in 13b are alternately displaced to open and close the first valve hole 19a and the second valve hole 19b.

Further, since the manual pin chamber 29 is housed so that the main shaft portion 1, the solenoid portion 2 and the main body are arranged in a line in the length direction of the main body, the manual pin 23 is accommodated. The width of the main body can be made narrower than in the case of

Further, since the manual pin 23 is housed in the manual pin chamber 29 in the central portion in the width direction between the main shaft portion 1 and the solenoid portion 2, the cam action of the cams 24c and 24d causes the spacers 27c and 27d to move. It will act linearly on the plungers 13a and 13b.

Further, when the spacers 27c and 27d are made of an elastic body, the spacers 27c and 27d can absorb the stacking tolerance in the axial direction.

Although the invention made by the inventor has been specifically described based on the embodiments, the invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say.

For example, the electromagnetic directional control valve of this embodiment is a 5-port type having an input port, a pair of output ports, and a pair of exhaust ports, but is a 3-port type with one each. It may be.

Further, although the spacers having the substantially L-shape and the substantially U-shape have been described in the present embodiment, it is possible to use a spacer having an arbitrary shape such as a cube, and The material does not necessarily have to be an elastic body.

[0059]

[Effect of device]

 The effects obtained by the typical ones of the inventions disclosed in the present application will be briefly described as follows.

(1) That is, according to the electromagnetic directional control valve of the present invention, the main pin portion, the solenoid portion, and the manual pin chamber are arranged in the longitudinal direction of the main body by making the manual pin chamber also serve as the fluid passage. Since the columns can be set in a single row, the width of the main body can be narrowed, and space efficiency is improved when a plurality of electromagnetic directional control valves are used side by side.

(2) At the same time, since the cam action of the cam formed on the manual pin acts linearly on the plunger via the spacer, the balance of the manual operation mechanism is improved and the reliability is improved. Is improved.

(3) In addition, since the spacer is made of an elastic body, it is possible to absorb the accumulation tolerance of the manual pin in the axial direction. The inconvenience of colliding with the column before reaching the point is eliminated.

(4). When one of the plungers is in the lock position, the other plunger is always in the non-lock position, so there is no risk of adjusting both plungers in the non-lock position. Therefore, when one valve hole is opened, the other valve hole is always closed, and malfunction of the non-driving system due to erroneous adjustment is eliminated.

(5) Further, since the manual pin can be provided in the central portion in the width direction of the main body, the operating means of the manual pin can be set in the central portion of the device, and the operability is improved.

(6) Particularly, according to the cam contour of the cam of the first embodiment, the plunger is in the locked state when the spacer is in contact with the outer peripheral surface of the cam and the manual pin rotates about half a turn. Since it is a wide range, the plunger can be stably maintained in the locked state without being affected by vibration or the like.

[Brief description of drawings]

FIG. 1 is a sectional view of an electromagnetic directional control valve showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the direction switching action of the electromagnetic directional control valve of FIG.

3 is an explanatory diagram showing a neutral state of a manual pin of the electromagnetic directional control valve of FIG. 1. FIG.

FIG. 4 is an explanatory view showing a state where the first plunger of the manual pin of the electromagnetic directional control valve of FIG. 1 is set to the lock position.

5 is an explanatory view showing a state where the second plunger of the manual pin of the electromagnetic directional control valve of FIG. 1 is set to the lock position.

6 is a perspective view of a manual pin of the electromagnetic directional control valve of FIG. 1. FIG.

FIG. 7 is a sectional view of an electromagnetic directional control valve showing a second embodiment of the present invention.

8 is a cross-sectional view showing the direction switching action of the electromagnetic directional control valve of FIG.

9 is an explanatory view showing a neutral state of a manual pin of the electromagnetic directional control valve of FIG. 7. FIG.

10 is an explanatory diagram showing a state in which the first plunger of the manual pin of the electromagnetic directional control valve of FIG. 7 is set to the lock position.

FIG. 11 is an explanatory view showing a state where the second plunger of the manual pin of the electromagnetic directional control valve of FIG. 7 is set to the lock position.

12 is a perspective view of a manual pin of the electromagnetic directional control valve of FIG. 7.

[Explanation of symbols]

 1 main shaft part 2 solenoid part 3 main shaft 4 lip seal 5 first piston 6 second piston 7,8 pressure chamber 9 input port 10a, 10b output port 11a, 11b exhaust port 12a, 12b solenoid 13a first plunger 13b first 2 Plunger 14a, 14b Column 15a, 15b Flange 16a, 16b Spring 17a, 17b Supply valve seat 18a, 18b Pilot valve valve body 19a First valve hole 19b Second valve hole 20a, 20b Pin 21a, 21b Flapper 21c, 21d Valve hole 22 Pressure release hole 23 Manual pin 24a, 24c 1st cam 24b, 24d 2nd cam 25 Projection part 25c Groove 26 Spring 27a, 27b, 27c, 27d Spacer 28a, 28b Passage 29 Manual pin chamber

Claims (4)

[Scope of utility model registration request] 1. A valve body for a pilot valve is provided in each of the two plungers, a manual pin chamber is provided in a central portion in the width direction between a main shaft portion and a solenoid portion, and one end of the manual pin is exposed to the outside. And is rotatably accommodated in the manual pin chamber, a cam is formed in the vicinity of the plunger of the manual pin, and is provided between the cam and the plunger by a cam action when the manual pin is rotated. It is configured to displace the valve element for the pilot valve provided on the plunger by displacing the spacer, and the fluid flowing from the input port passes through the manual pin chamber and is opened and closed by the valve element for the pilot valve. Flow through the valve hole, pressurize the pressure chamber to displace the main shaft position, and the valve hole for the pilot valve opens and closes the cam action by the rotation of the manual pin. An electromagnetic directional control valve characterized by being alternately performed by. 2. The cam formed on the manual pin,
Both of them have a cam profile in which the outer peripheral surface of the substantially cylindrical manual pin is cut out to form a flat portion, and the cam profiles are formed in the same direction, and the spacers are opposite to the cam. The electromagnetic directional control valve according to claim 1, wherein the electromagnetic directional control valve is provided in a direction. 3. The cam formed on the manual pin,
Both of them have a cam profile in which a protrusion is provided on a part of a cylindrical part, and the cam profiles are formed in different directions, and the spacer is provided in the same direction with respect to the cam. The electromagnetic directional control valve according to claim 1, wherein 4. The electromagnetic directional control valve according to claim 1, 2 or 3, wherein the spacer is made of an elastic material.