JPH04105683U - solenoid valve - Google Patents

Abstract

(57) [Summary] [Purpose] The discharge flow path provided in the mating housing can be shared between the return fluid from the controlled part and the accumulated fluid from the solenoid, simplifying the configuration and improving operational response. We aim to improve sexual performance. [Structure] A fourth port 8 for discharging the fluid accumulated in the solenoid 4 is arranged between the spool 3 and the solenoid 4, and a communication path is provided on the outer periphery of the valve sleeve 2 that communicates the fourth port 8 and the third port 7. 10 and an integrated discharge flow path 16.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a solenoid valve used in various control valves such as hydraulic control valves. .

0002

[Conventional technology]

As a conventional electromagnetic valve of this type, there is one shown in FIG. 5, for example. sand That is, this solenoid valve 100 has a spout on the inner periphery of a valve sleeve 101 as a valve body. A spool 102 is slidably inserted into the valve sleeve 1. Reciprocating drive using the electromagnetic attraction force of the solenoid 103 integrated with 01 It is designed to let you do so. The solenoid 103 has one end connected to a plate as an internal movable iron core. A rod 10 connected to the plunger 104 and having the other end protruding into the valve sleeve 101 5, and drives the spool 102 via this rod 105. Ru.

0003 The valve sleeve 101 has a first port 106 on the fluid supply source side and a controlled part. a second port 107 on the actuator side as an actuator, and return fluid from the actuator. a third port 108 for discharging the spool 102 and the valve sleeve 101 A fourth port is used to discharge fluid that has accumulated inside the solenoid 103 due to leakage, etc. A port 109 is provided, and by moving the spool 102, connection between each port is provided. It is designed to switch the communication state.

0004 This valve sleeve 101 has a mounting hole in a mating housing 110 of a mating member. 111, and each of the first to fourth ports 106 to 109 is Four supply source channels 112 and outlets provided in the mating housing 110 corresponding to the The flow path 113 is connected to the return fluid discharge flow path 114 and the accumulated fluid discharge flow path 115. was.

[0005]

[Problem that the idea aims to solve]

However, in the case of the above-mentioned conventional technology, the accumulated fluid inside the solenoid 103 is discharged. A fourth port 109 for output is located on the distal end side of the valve sleeve 101, and Since there is also a third port 108 for return fluid discharge on the ether side, the mating housing 1 10 has fluid discharge ports corresponding to the third and fourth ports 108 and 109, respectively. Two channels, channels 114 and 115, were required.

[0006] Moreover, in this way, the fourth port 109 for discharging the accumulated fluid in the solenoid 103 is If it is on the tip side of the valve sleeve 101, when the solenoid 103 turns from ON to OFF. Then, the fluid accumulated inside the solenoid 103 is released from the valve valve from inside the solenoid 103. The fluid is discharged into the sleeve 101, but the flow direction of the fluid is The direction of movement is reversed, a damper effect occurs due to the influence of viscous resistance, and the spool 102 The drawback was that it made the movement worse.

[0007] Furthermore, conventionally, when the first port 106 and the second port 107 are closed, the Fluid is not supplied to the rotary bearings of the actuator (not shown), so there is no need for a lubricating flow. There is also the problem that a separate path must be provided, which complicates the configuration and increases costs. Ta.

[0008] The present invention was devised to solve the above-mentioned problems of the prior art, and its purpose is to In this case, the discharge flow path of the mating mounting member to which the valve body is assembled must be separated from the controlled part. The return fluid from the solenoid and the accumulated fluid from the solenoid can be shared, and the solenoid We propose a solenoid valve that does not obstruct the movement of the spool due to the flow of fluid accumulated in the lenoid. The purpose is to improve operational response and simplify the structure.

[0009] Another purpose is to lubricate the bearings on the controlled part side with a simple structure. The purpose is to prevent burn-in as much as possible.

0010

[Means to solve the problem] In order to achieve the above object, this invention includes a solenoid and a solenoid. an internally hollow valve body that is integrally assembled; and a valve body that is slidably inserted into the valve body; a spool, and a plunger, one end of which functions as a fixed core inside the solenoid. a rod connected to the spool, the other end protruding inside the valve body, and operatively connected to the spool; The valve body has a first port on the fluid supply source side and a second port on the controlled part side. port and a third port for discharging the return fluid from the controlled part to the solenoid. a fourth port for discharging the fluid accumulated in the valve body; into the inner periphery of the mounting part of the mating member, and connect the first to fourth ports to each port. In a solenoid valve connected to a flow path provided in a mounting member that opens accordingly, The fourth port is located between the spool and the solenoid, and the valve main A communication path for communicating the fourth port and the third port is provided on the outer periphery of the body, and a mounting partner is provided. It is characterized by integrating the side discharge channels into one.

[0011] The land portion of the spool and the outer periphery of at least one of the valve body are A lubrication passage is provided that communicates the first port and the second port, and a lubrication passage is provided that communicates with the second port. It is preferable to always be able to supply lubricating fluid to the controlled parts regardless of the movement of the pool. Delicious.

0012

[Effect]

In the solenoid valve with the above configuration, the fourth port is The fluid accumulated in the solenoid discharged from the solenoid and the fluid returned from the controlled part are It is discharged from one discharge channel provided in the hand member.

[0013] Since the fourth port was placed between the solenoid and the spool, the solenoid Even if the stagnant fluid flows into the valve body, the spool will not be affected and the stagnant flow will be removed. The body flows out smoothly from the fourth port.

[0014] In addition, fluid flows through the lubrication passage provided on the outer periphery of the spool land and the outer periphery of the valve body. is always connected to the controlled part and can lubricate the controlled part.

[0015]

【Example】

The present invention will be explained below based on illustrated embodiments. According to an embodiment of the present invention In Fig. 1 showing a solenoid valve, 1 indicates the entire solenoid valve, which is roughly a hollow valve body. A valve sleeve 2 as a body and a valve inserted into the valve sleeve 2 so as to be able to reciprocate. A spool 3 and a solenoid 4 integrally assembled to one end of the valve sleeve 2. , is equipped with.

[0016] The solenoid valve 1 in this embodiment is for hydraulic control, and the valve sleeve 2 is used to supply fluid. The first port 5 on the pressure source side as a source and the actuator 9 side as a controlled part. a second port 6 and a third port for discharging return fluid from the actuator 9 7 and a fourth port 8 for discharging the fluid accumulated in the solenoid 4. There is. The first to fourth ports 5 to 8 are provided on the side wall of the valve sleeve 2, respectively. There is. Among these, the first port 5 is disposed closest to the distal end side of the valve sleeve 2.

[0017] On the other hand, the second, third, and fourth ports 6, 7, and 8 are relative to the central axis of the valve sleeve 2. They are placed on opposite sides of each other. That is, the third and fourth ports 7 and 8 are located on the same side, and the second port 6 is located on the opposite side. Furthermore, the second port Port 6 is composed of two output side and return side second ports 61 and 62 that are spaced apart in the axial direction. be done. On the other hand, the third and fourth ports 7 and 8 are connected to the solenoid valve from the distal end side of the valve sleeve 2. The third and fourth ports 7 and 8 are arranged in this order toward the ID 4, and the fourth port 8 is It is located between the spool 3 and the solenoid 4.

[0018] On the outer periphery of the valve sleeve 2, there is provided communication between the fourth port 8 and the third port 7. A communication path 10 is provided so as to

[0019] The valve sleeve 2 is mounted on a mating housing 11, which is a mating member. It is inserted into the inner periphery of the attached hole 12. And, this mating housing 11 has the above-mentioned A pressure source flow path 13 that opens corresponding to the first to fourth ports 5 to 8, and the actuator side. Output and return channels 14, 15 and a discharge channel 16 are provided.

[0020] This pressure source flow path 13 is connected to the first port 5, the actuator side output, and the return flow path 14. , 15 are connected to the output side and return side two ports 61, 62, and the third and fourth ports 7 and 8 are connected to a discharge flow path 16 via a communication path 10.

[0021] On the other hand, the outer periphery of the land portion 17 that opens and closes the first port 5 of the spool 3 has a small diameter. A step portion 18 is provided that constitutes a lubrication passage, and the first port is connected through the step portion 18. Even in the closed position of 5, a predetermined amount of oil from the pressure source is supplied to the second port 6 side, is constantly connected to the actuator 9 through the second port 6 and the actuator side flow path 14. supplying.

[0022] On the other hand, one end of the solenoid 4 is connected to a plunger 19 serving as an internal movable iron core. The other end protrudes into the valve sleeve 2, and the protruding end is operatively connected to the spool 3. A rod 20 is provided.

[0023] The solenoid 4 includes a core 21 that functions as a fixed iron core, and a core 21 that surrounds the core 21. A coil 22 arranged as shown in FIG. a connector 24 that closes the open end of the base 23. And core 2 1, one end of which is arranged to be driven in the internal space of the valve sleeve 2, and the plunger 19 is It is inserted into the space between the core 21 and the connector 24 so as to be able to move back and forth. and The core 21 includes an inner space of the valve sleeve 2 and a solenoid in which the plunger 19 is inserted. A passage 25 is provided that communicates with the internal space of the id 4.

[0024] On the other hand, the end opening of the valve sleeve 2 on the opposite side from the solenoid 4 is connected to the plug 26. The spool 3 is connected to the solenoid between the plug 26 and the spool 3. A spring 27 is attached that biases toward the door 4 side.

[0025] In the solenoid valve configured as described above, the spring force of the spring 27 normally causes the spout to The core 3 is biased toward the solenoid 4, and the plunger 19 is moved to the core 2 via the rod 20. 1. Then, the tip land portion 17 of the spool 3 is connected to the first port. It is in a position to close the opening 5.

[0026] When the coil 22 is energized, the plunger 19 resists the spring force of the spring 27. The spool 3 is magnetically attracted to the core 21 side and moves to the tip side of the valve sleeve 2. 1 port 5 is opened, the first port 5 and the second port 6 are communicated, and the pressure source flow path 13 is connected. Hydraulic pressure is supplied to the actuator 9 to drive and control the actuator 9. Actu The pressure supplied to the ether 9 is controlled by adjusting the amount of current applied to the coil 22 to open the first port 5. This is done by changing the mouth area.

[0027] Then, when the power to the coil 22 is cut off, the spring force of the spring 27 causes the spring to turn off. The actuator 3 is pushed back to its original position, the first port 5 is closed, and pressure is applied to the actuator 9. When the force introduction is stopped, the force is discharged from the return side second port 62 through the third port 7. It is discharged into the flow path 16.

[0028] At this time, the rod 20 is inserted into the solenoid 4, and the volume into which the rod 20 enters is increases, and the amount of fluid that accumulates in the solenoid 4 through the passage 25 of the core 21 increases. of oil flows into the internal space of the valve sleeve 2, and this fluid such as oil flows into the inner space of the valve sleeve 2. It flows out from the discharge passage 16 through the 4-port 8 and the communication passage 10. in this way, To drain the return oil from the actuator 9 side and the accumulated oil inside the solenoid 4. The discharge channels 16 can be integrated.

[0029] Also, when the coil 22 is off, the land portion 17 of the spool 3 closes the first port 5. However, since the stepped portion 18 is provided on the outer periphery of the land portion 17, this The first port 5 and the second port 6 are communicated through the stepped portion 18, and a small amount of oil is is constantly supplied to the actuator 9, for example in a valve timing control system of an internal combustion engine. If the actuator 9 has a rotating bearing part, such as a can be achieved.

[0030] FIG. 2 shows a solenoid valve according to another embodiment of the present invention. In this example, A stepped portion 28 constituting a lubrication passage is provided on the outer periphery of the valve sleeve 2. Pressure oil is supplied to the second port through the gap between the outer circumference of the valve 2 and the inner circumference of the mounting hole 12 of the housing 11. It is designed to always flow to port 6. However, as shown in the example, the label of spool 3 A stepped portion 18 is also provided on the outer periphery of the end portion 17, and the outer periphery of the spool 3 and the outer periphery of the valve sleeve 2 are Pressure oil may be supplied from both, or it may be provided independently from either. You can also do this.

[0031] In addition, as a lubrication passage provided on the outer periphery of the valve sleeve 2, as shown in FIG. A stepped portion 28 may be formed around the entire circumference, or a slit may be formed partially as shown in FIG. A groove 29 may also be provided.

[0032] The other configurations and functions are the same as those of the above embodiment, so they are the same. The same reference numerals are given to the constituent parts, and the explanation thereof will be omitted.

[0033]

[Effect of the idea]

The present invention has the above-described structure and function, and has a fourth port and a second port on the outer periphery of the valve body. By providing a communication path that communicates the 3 ports, the accumulated fluid inside the solenoid and The return fluid from the controlled part can be discharged from one discharge passage, and the attached part The flow path configuration on the material side can be simplified, making manufacturing easier.

[0034] In addition, the 4th port that discharges the fluid accumulated in the solenoid is connected to the solenoid and spool. By placing the fluid between the ports, the fluid can flow directly from the fourth port without passing through the spool section. This reduces the resistance to the spool and improves operational response. Ru.

[0035] Furthermore, a first port on the supply side and a second port on the controlled side are attached to the land part of the spool. By providing a lubrication passage that communicates between the two and constantly supplying fluid to the controlled part, Seizure of bearings, etc. of controlled parts can be avoided without providing a dedicated lubrication flow path as in the past. can be prevented.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a solenoid valve according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a solenoid valve according to another embodiment of the present invention.

FIG. 3 is a view taken in the direction of arrow A in FIG. 2;

FIG. 4 is a diagram showing another aspect of FIG. 3;

FIG. 5 is a longitudinal cross-sectional view of a conventional solenoid valve.

[Explanation of symbols]

1 Solenoid valve 2 Valve sleeve 3 Spool 4 Solenoid 5 1st port 6 2nd port 7 3rd port 8 4th port 9 Actuator 10 Communication path 11 Opponent housing 12 Mounting hole 13 Pressure source flow path 14 Actuator side output flow path 15 Actuator side return flow path 16 Discharge channel 17 Land section 18 Stepped section (lubrication passage) 19 Plunger 20 rod 21 core 22 coil 23 case 24 Connector 25 Passage 26 Plug 27 Spring 28 Stepped section (lubrication passage) 29 Slit groove (lubrication passage)

Claims (2)

[Scope of utility model registration request] 1. A solenoid, an internal hollow valve body assembled integrally with the solenoid, a spool slidably inserted into the valve body, and a plunger whose one end functions as a fixed iron core inside the solenoid. a rod connected to the spool, the other end of which protrudes inside the valve body and is operatively connected to the spool, the valve body having a first port on the fluid supply source side and a second port on the controlled part side. and a third port for discharging the return fluid from the controlled part, and a fourth port for discharging the fluid accumulated in the solenoid, and the valve body is installed in the mounting part of the mating member. In a solenoid valve that is inserted into the circumference and connected to a flow path provided in a mounting member that opens the first to fourth ports corresponding to each port, the fourth port is located between the spool and the solenoid. At the same time, the fourth
A solenoid valve characterized in that a communication path is provided for communicating a port and a third port, and a discharge flow path on a mounting partner is integrated into one. 2. A lubrication passage communicating between the first port and the second port is provided on the outer periphery of at least one of the land portion of the spool and the valve body, and the lubrication passage is always provided through the lubrication passage regardless of movement of the spool. The electromagnetic valve according to claim 1, which is capable of supplying lubricating fluid to the controlled portion.