CN213117714U - Control valve - Google Patents

Abstract

The present invention provides a control valve, according to one embodiment of the control valve, for example, when the control valve is mounted on a vehicle, vibration in the control valve generated when liquid passes can be reduced regardless of the posture of the vehicle. The control valve (1) comprises: a valve body (2) including a housing section (26) having a space (261), and a plurality of flow paths which are connected to the space (261) and through which a liquid (Q) passes; a spool body that is movably housed in the space (261) and switches between passing and blocking of the liquid (Q) between the space (261) and each flow path; and a solenoid connected to the housing section (26) and generating a magnetic force by energization to move the spool. The space (261) functions as a vibration damping chamber that damps vibration generated when the liquid (Q) passes therethrough. The valve body (2) has a return flow path (29) that is connected to the space (261) and returns the liquid (Q) discharged from the space (261) to the damping chamber.

Description

Control valve

Technical Field

The utility model relates to a control valve.

Background

In the past, there have been automobiles equipped with automatic transmissions. The automatic transmission includes a control valve for controlling the transmission mechanism. The control valve includes, for example: a valve body having an oil passage (hydraulic circuit) through which oil for driving passes; an oil pump serving as a supply source for supplying oil to the hydraulic circuit; and various switching valves for switching the hydraulic circuit.

Further, the control valve may be arranged such that the entire valve body is disposed in an oil pan (oil pan) filled with oil (see, for example, patent document 1). In this case, the damping chamber (damping chamber) provided in the valve body is always filled with oil. If the oil in the damper chamber is insufficient, oil vibration (pulsation of oil) occurs, but oil vibration can be prevented by always filling the damper chamber with oil.

[ Prior art documents ]

[ patent document ]

[ patent document 1] Japanese patent No. 3349653 publication

SUMMERY OF THE UTILITY MODEL

[ problem to be solved by the utility model ]

However, in some control valves, a part of the valve body is disposed in the oil pan, and the remaining part is exposed from the liquid surface of the oil. In this case, there are problems as follows: the state in which the damping chamber is always filled with oil is not maintained, and oil vibration occurs.

An object of the present invention is to provide a control valve, according to one embodiment of the control valve, for example, when the control valve is mounted on a vehicle, vibration in the control valve generated when liquid passes can be reduced regardless of the posture of the vehicle.

[ means for solving problems ]

An embodiment of the control valve of the utility model includes: a valve body including a housing portion having a space provided along an axial direction, and a plurality of flow paths connected to the space and through which liquid passes; a spool body that is housed in the space so as to be movable in an axial direction, and switches between passage and blocking of the liquid between the space and each of the flow paths by the movement; and a solenoid connected to one side of the housing in the axial direction, and configured to move the spool by generating a magnetic force when energized; at least a part of the space functions as a damping chamber for damping vibration generated when the liquid passes through the space, and the valve body has a return flow path connected to the space and returning the liquid discharged from the space to the damping chamber.

In one embodiment of the control valve of the present invention, the return flow path has: a first through hole penetrating from the space to an upper surface of the valve body; a second through hole provided at a position different from the first through hole, the second through hole penetrating from an upper surface of the valve body to the damper chamber; and a wall portion that protrudes toward the upper surface of the valve body and surrounds both a first opening portion of the first through hole that opens in the upper surface of the valve body and a second opening portion of the second through hole that opens in the upper surface of the valve body.

In one embodiment of the control valve of the present invention, when a line connecting the center of the first opening portion and the center of the second opening portion is assumed, the line intersects with the axial direction when looking straight.

In an embodiment of the control valve of the present invention, the liquid is in a state of passing from the space to the upper surface of the valve body in the first through hole, and the liquid is in a state of passing from the upper surface of the valve body to the damping chamber in the second through hole, and the second opening portion is disposed at a position higher than the first opening portion.

In one embodiment of the control valve of the present invention, the housing portion protrudes in a direction orthogonal to the axial direction, and the second opening portion is disposed at an uppermost portion of the housing portion.

In one embodiment of the control valve of the present invention, the size of the second opening portion is smaller than the size of the first opening portion.

In an embodiment of the control valve of the present invention, a height of the wall portion on the side of the first opening portion is higher than a height of the wall portion on the side of the second opening portion.

In one embodiment of the control valve of the present invention, the valve body is constituted in such a manner that a plurality of solenoids can be connected.

In one embodiment of the control valve of the present invention, the control valve is stored in a storage tank storing the liquid and used, and the first opening portion and the second opening portion are respectively disposed above a liquid level in the storage tank.

[ effects of the utility model ]

According to an embodiment of the control valve of the present invention, when the control valve is mounted on a vehicle, for example, vibration in the control valve generated when liquid passes can be reduced regardless of the posture of the vehicle.

Drawings

Fig. 1 is a perspective view showing an embodiment of a control valve according to the present invention.

Fig. 2 is a view (side view) seen from the direction of arrow a in fig. 1.

Fig. 3 is an enlarged perspective view of an area [ B ] surrounded by a chain line in fig. 1.

Fig. 4 is a view (plan view) as viewed from the direction of arrow C in fig. 2.

Fig. 5 is a cross-sectional view taken along line D-D of fig. 2.

Fig. 6 is a cross-sectional view taken along line E-E of fig. 5.

Fig. 7 is a sectional view taken along line F-F of fig. 5.

[ description of symbols ]

1: control valve

2: valve body

21: first body

211: upper surface (side facing upward)

22: second body

23: third body

24: first partition board

25: second partition plate

26: storage part

26A: storage part

26B: storage part

26C: storage part

261: space(s)

261 a: vibration damping chamber

262: internal thread

263: end face

27: flow path

29: return flow path

291: the first through hole

292: second through hole

293: wall part

294: a first opening part

295: a second opening part

296: curved inclined plane

3: slide valve body

31: large diameter part

32: small diameter part

33: concave part

4: solenoid coil

4A: solenoid coil

4B: solenoid coil

4C: solenoid coil

41: bobbin

411: through hole

414: outer peripheral portion

42: plunger piston

421: plunger pin

422: plunger body

43: coil

44: outer casing

45: core

46: magnetic yoke

47: connector with a locking member

5: elastic member

51: spiral spring

6: adjusting member

61: external thread

62: concave part (first concave part)

63: concave part (second concave part)

7: fixing member

71: nut

72: internal thread

73: end face

8A: connector with a locking member

82: cable with a protective layer

10: oil pan

F5: elasticity of the spring

H294: height

H295: height

LS: liquid level

LN: thread

O2: shaft

Q: liquid, method for producing the same and use thereof

Detailed Description

An embodiment of the control valve of the present invention will be described with reference to fig. 1 to 7. Hereinafter, three axes orthogonal to each other are set as an X axis, a Y axis, and a Z axis for convenience of description. For example, an XY plane including an X axis and a Y axis is horizontal, and a Z axis is vertical. A direction parallel to the X axis may be referred to as an "axial direction (axis O2 direction)", a radial direction around the axis may be referred to as a "radial direction", and a circumferential direction around the axis may be referred to as a "circumferential direction". The X-axis direction positive side may be referred to as "one end side in the axial direction" or simply as "one end side", and the X-axis direction negative side may be referred to as "the other end side in the axial direction" or simply as "the other end side". In this specification, the vertical direction, the horizontal direction, the upper side, and the lower side are only names for describing relative positional relationships of the respective parts, and the actual positional relationships and the like may be positional relationships other than those indicated by the names.

The control valve 1 shown in fig. 1 is mounted on a vehicle such as an automobile, for example, and controls the operation of a transmission mechanism. The control valve 1 includes: a valve body 2, a spool 3, a solenoid 4, an elastic member 5, an adjustment member 6, a fixing member 7, and a connector 8A. The structure of each part will be described below.

As shown in fig. 1 and 2, the valve body 2 includes: a plate-shaped first body 21, a plate-shaped second body 22, a plate-shaped third body 23, a sheet-shaped first separator 24, and a sheet-shaped second separator 25. Further, the third body 23, the second partition plate 25, the second body 22, the first partition plate 24, and the first body 21 are arranged in this order from the negative side (lower side) in the Z-axis direction. Thus, for example, when manufacturing the valve body 2, the valve body 2 can be quickly and easily assembled by a simple operation of stacking the first body 21, the second body 22, the third body 23, the first partition 24, and the second partition 25 in this order. In the present embodiment, the first body 21 of the valve body 2 is positioned on the uppermost side in a state where the control valve 1 is mounted on the vehicle.

The first body 21 has a housing portion 26 protruding toward the positive side (upper side) in the Z-axis direction. The spool 3 is housed in the housing portion 26. In the present embodiment, three receiving portions 26 are disposed with an interval in the Y-axis direction (the direction orthogonal to the axis O2 direction). Hereinafter, the three storage portions 26 may be referred to as "storage portion 26A", "storage portion 26B", and "storage portion 26C" in order from the negative side in the Y axis direction. The number of the storage portions 26 is not limited to three, and may be one, two, or four or more, for example.

The storage section 26A, the storage section 26B, and the storage section 26C have the same configuration except for different arrangement positions, and therefore the storage section 26A will be described as a representative.

As shown in fig. 6, the housing portion 26A has a space 261 provided along the axis O2. In the space 261, a spool 3 described later is housed so as to be movable in the direction of the axis O2.

On the X-axis direction negative side (the other side in the direction of the axis O2) of the housing 26A, a female screw 262 is provided that penetrates the space 261 along the direction of the axis O2. The male screw 61 of the adjustment member 6 described later is coupled to the female screw 262 by screwing (thread).

The first body 21 has a plurality of flow paths 27 connected to the space 261 of the housing 26A. The liquid Q can pass through each flow path 27. The number of the channels 27 is not particularly limited as long as it is a plurality. The shape of each flow path 27 is not particularly limited, and examples thereof include: straight, curved, bent, or a combination thereof. The liquid Q passing through each flow path 27 may be oil as a working fluid (working fluid) when the control valve 1 controls the operation of a transmission mechanism of a vehicle as in the present embodiment, for example.

The spool valve body 3 is housed in the space 261 so as to be movable in the direction of the axis O2. As shown in fig. 6, the spool body 3 includes a cylindrical body having a central axis parallel to the direction of the axis O2, and has a plurality of large diameter portions 31 and a plurality of small diameter portions 32 having different outer diameters. When the spool body 3 moves in the space 261 along the direction of the axis O2, the positions (X-axis coordinates) of the large-diameter portions 31 and the small-diameter portions 32 in the space 261 change, and the flow paths 27 can be opened and closed. Thereby, the passage and blocking of the liquid Q between the switchable space 261 and each flow path 27 are performed.

As described above, the first body 21 has three receiving portions 26. The solenoid 4 may be connected to the positive side of each housing 26 in the X axis direction. Hereinafter, the solenoid 4 connected to the housing 26A may be referred to as "solenoid 4A", the solenoid 4 connected to the housing 26B may be referred to as "solenoid 4B", and the solenoid 4 connected to the housing 26C may be referred to as "solenoid 4C".

The solenoid 4A, the solenoid 4B, and the solenoid 4C have the same configuration except for different positions, and therefore the solenoid 4A will be described as a representative.

As shown in fig. 6, the solenoid 4A has: bobbin 41, plunger 42, coil 43, housing 44, core 45, yoke 46, and connector 47.

The bobbin 41 is a cylindrical member having a through hole 411. The through hole 411 passes along an axis O2 parallel to the X-axis direction. The bobbin 41 contains a metal material having magnetism.

A coil 43 having conductivity is wound around the outer circumferential portion 414 of the bobbin 41. Then, by turning the coil 43 into an energized state, a magnetic path is formed by the bobbin 41, the core 45, and the yoke 46, and a magnetic force is generated. This allows the plunger 42 to move in the negative X-axis direction together with the spool 3. The elastic member 5 described later supports the movement of the spool 3 to the positive side in the X axis direction. This makes it possible to reciprocate the spool 3 along the axis O2.

The core 45 and the yoke 46 are inserted into the through hole 411 of the bobbin 41, and the plunger 42 is inserted inside.

The core 45 is disposed on the X-axis direction negative side, and the yoke 46 is disposed on the X-axis direction positive side.

The core 45 is cylindrical as a whole and is disposed parallel to the X-axis direction. The yoke 46 is also cylindrical as a whole and is disposed parallel to the X-axis direction. Similarly to the bobbin 41, the core 45 and the yoke 46 include a metal material having magnetism. This can generate a magnetic path to the extent that the plunger 42 can be sufficiently moved.

The plunger 42 is disposed across the core 45 and the yoke 46, and is supported so as to be movable back and forth along the axis O2. The plunger 42 includes a cylindrical plunger body 422 and a plunger pin 421 inserted into the plunger body 422. The plunger pin 421 protrudes at least toward the X-axis direction positive side and contacts the spool 3.

The case 44 is formed in a cylindrical shape, and houses the bobbin 41, the plunger 42, the coil 43, the core 45, and the yoke 46 inside. The portion of the housing 44 on the X-axis direction negative side is fixed to the housing portion 26A by caulking. This causes the solenoid 4A to be connected to the housing 26A.

The connector 47 protrudes toward the Z-axis direction negative side of the housing 44, and is connected to a coupler (not shown) that energizes the coil 43. In the present embodiment, the connection direction of the coupler to the connector 47 is a direction toward the negative side in the X-axis direction, but the present invention is not limited thereto.

In this way, the first body 21 (valve body 2) is configured to be connectable with the solenoids 4 corresponding to the number of the arrangement of the housing portions 26. This allows the spool 3 corresponding to each solenoid 4 to move independently.

Similarly to the housing portion 26, the plurality of solenoids 4 are arranged with intervals in the Y-axis direction (direction orthogonal to the axis O2 direction). This makes it possible to easily perform the connection work when connecting each solenoid 4 to the first body 21. The interval between the solenoids 4A and 4B and the interval between the solenoids 4B and 4C may be the same or different.

As shown in fig. 6, the elastic member 5 is disposed in the vibration damping chamber 261a located on the negative side in the X-axis direction (the other side in the direction of the axis O2) in the housing portion 26, that is, on the opposite side of the solenoid 4A across the spool 3. The damper chamber 261a will be described later. Further, the adjustment member 6 is disposed on the X-axis direction negative side (the other side in the direction of the axis O2) with respect to the elastic member 5.

The elastic member 5 is a coil spring 51, and contacts the spool 3 on the X-axis positive side and the adjustment member 6 on the X-axis negative side. In addition, the elastic member 5 is maintained in a compressed state between the spool body 3 and the adjustment member 6. Thus, the elastic member 5 can provide the elastic force F5 for pushing the spool 3 toward the solenoid 4 with a simple configuration. The spring force F5 is coupled with the magnetic force generated by the solenoid 4A, and the spool 3 is reciprocated along the axis O2.

The adjustment member 6 can adjust the spring force F5 against the spool valve body 3. The adjustment member 6 is formed in a cylindrical shape. The adjustment member 6 has a male screw 61 on the outer peripheral portion thereof, which is screwed into the female screw 262 of the housing 26. Further, when the adjustment member 6 is rotated clockwise about the axis O2 as viewed from the negative side in the X-axis direction, the adjustment member 6 can be moved to the positive side in the X-axis direction. Thereby, the elastic member 5 is further compressed between the spool body 3 and the adjustment member 6, and thus the elastic force F5 against the spool body 3 increases. Further, when the adjustment member 6 is rotated counterclockwise about the axis O2 as viewed from the X-axis direction negative side, the adjustment member 6 can be moved to the X-axis direction negative side. Thereby, the elastic member 5 is relaxed in the compressed state between the spool 3 and the adjustment member 6, and the elastic force F5 against the spool 3 is reduced. In this way, the position of the adjustment member 6 along the axis O2 can be changed by a simple operation of rotating the adjustment member 6 around the axis O2. Further, the degree of compression of the elastic member 5 changes in accordance with the position of the adjustment member 6, so the elastic force F5 against the spool body 3 can be easily adjusted.

The adjustment member 6 has a recess (first recess) 62 provided on the X-axis direction negative side (the other side in the direction of the axis O2), and a recess (second recess) 63 provided on the X-axis direction positive side (the one side in the direction of the axis O2).

The recess 62 is formed in a shape into which a hexagonal wrench (not shown) can be inserted. Further, by operating the hexagonal wrench in a state of being inserted into the recess 62, the adjustment member 6 can be easily rotated around the axis O2.

The concave portion 63 functions as a spring seat that brings the negative side of the elastic member 5 into contact with the X-axis direction. On the other hand, the spool body 3 is also provided with a recess 33 that functions as a spring seat that brings the elastic member 5 into contact with the X-axis direction positive side. The elastic member 5 can be stably expanded and contracted by the concave portion 63 and the concave portion 33. Preferably, both the recess 63 and the recess 33 are tapered. Thus, when the control valve 1 is assembled, the work of inserting the X-axis direction negative side of the elastic member 5 into the recess 63 and the X-axis direction positive side of the elastic member 5 into the recess 33 can be easily performed. In the assembled control valve 1, when the elastic member 5 expands and contracts, friction between the outer peripheral portion of the elastic member 5 and the inner peripheral portion of the recess 63 can be prevented. This prevents the outer peripheral portion of the elastic member 5 and the inner peripheral portion of the recess 63 from being worn. Similarly, when the elastic member 5 expands and contracts, friction is prevented from occurring between the outer peripheral portion of the elastic member 5 and the inner peripheral portion of the concave portion 33. This prevents the outer peripheral portion of the elastic member 5 and the inner peripheral portion of the recess 33 from being worn.

The fixing member 7 detachably fixes the adjusting member 6 to the first body 21 of the valve body 2, that is, a fixed state in which the adjusting member 6 is fixed to the first body 21 and a released state in which the fixed state is released can be obtained. Here, the "fixed state" means a state in which the position of the adjustment member 6 along the axis O2 is limited, that is, the position is not changed, even when a torque is applied to the adjustment member 6 around the axis O2. The "released state" refers to a state in which the adjustment member 6 is movable along the axis O2 when a torque is applied to the adjustment member 6 so as to surround the axis O2.

The fixing member 7 is a nut 71 disposed outside the housing 26. The nut 71 has a female screw 72 screwed to be coupled to the male screw 61 of the adjustment member 6.

When the fixing member 7 is rotated clockwise about the axis O2 as viewed from the negative side in the X-axis direction, the fixing member 7 can be moved to the positive side in the X-axis direction. As a result, the end surface 73 on the positive side in the X-axis direction (one side in the direction of the axis O2) of the fixed member 7 approaches the end surface 263 on the negative side in the X-axis direction (the other side in the direction of the axis O2) of the housing 26, and finally, as shown in fig. 6, the end surface 73 of the fixed member 7 contacts the end surface 263 of the housing 26. At this time, since the adjustment member 6 is fixed sufficiently to the valve main body 2, the elastic force F5 of the elastic member 5 against the spool 3 can be maintained fixed.

When the fixed state is changed to the released state, the fixed member 7 in the fixed state is rotated counterclockwise about the axis O2 as viewed from the X-axis direction negative side, whereby the fixed member 7 can be moved toward the X-axis direction negative side. Thereby, the end surface 73 of the fixing member 7 is separated from the end surface 263 of the housing portion 26, and the released state is achieved. In the released state, the fixed state can be sufficiently released. Thereby, the position of the adjustment member 6 can be changed to readjust the elastic force F5. In addition, in the released state, the adjustment member 6 can be detached from the first body 21.

For example, when the adjustment member 6 is coupled to the first body 21, the posture of the adjustment member 6 is inclined with respect to the axis O2, and as a result, when the female screw 262 of the first body 21 is damaged by deformation or the like, the first body 21 is discarded, but there is a demand for reusing the adjustment member 6, which is one of the components constituting the control valve 1, as it is. As described above, in the released state, the adjustment member 6 can be disengaged from the first body 21. Thus, in order to satisfy the above desire, the adjustment member 6 detached from the first body 21 can be coupled to a new first body 21, and the adjustment member 6 can be reused. Further, similarly to the adjustment member 6, for example, other components constituting the control valve 1 such as the elastic member 5 may be reused.

The connector 8A is disposed and fixed on the first body 21 of the valve body 2. The connector 8A is electrically connected to each solenoid 4 via a plurality of cables 82. The connector 8A is electrically connected to a coupler (not shown) on the side opposite to the cable 82. In the present embodiment, the connection direction of the coupler to the connector 8A is a direction toward the negative side in the X-axis direction, but the present invention is not limited thereto.

As shown in fig. 2, the control valve 1 is housed in an oil pan 10 and used. The oil pan 10 is a storage tank in which the liquid Q as oil is stored. The control valve 1 is preferably entirely housed in the oil pan 10, and may be partially positioned higher than the liquid surface LS of the oil pan due to various conditions such as a positional relationship with a transmission mechanism in the vehicle. In the present embodiment, as shown in fig. 2 and 6, a state in which each of the housing portions 26 of the first body 21 is located at a position higher than the liquid surface LS of the oil pan will be described as an example.

Further, the portion inside each housing 26, that is, the portion on the positive side in the X-axis direction of the space 261 functions as a vibration damping chamber 261a, and the vibration damping chamber 261a exerts a vibration damping effect of damping vibration (oil vibration), that is, pulsation, generated when the liquid Q passes through the flow path 27. In order to exhibit the vibration damping effect, it is preferable that the inside of each vibration damping chamber 261a is always filled with the liquid Q, but since the storage unit 26 is at a position higher than the liquid surface LS due to the posture of the vehicle, the following disadvantages may occur: the fluid Q is discharged from the damping chamber 261a by the movement of the spool 3, and the damping chamber 261a becomes empty.

Therefore, the control valve 1 is configured to prevent the above-described problem. The following describes a configuration and an operation for preventing the above-described problems.

As shown in fig. 1, the first body 21 has a return channel (return channel)29 provided in connection with the space 261 of each housing portion 26. Since the return channels 29 have the same configuration except for the different arrangement positions, the return channels 29 arranged in the housing portion 26A will be described as a representative.

The return flow path 29 can return the liquid Q discharged from the space 261 to the damping chamber 261a, and the damping chamber 261a can be always filled with the liquid Q. As shown in fig. 3 and 4, the return channel 29 includes: a first through hole 291, a second through hole 292, and a wall 293.

As shown in fig. 5 to 7, the first through hole 291 is provided from the middle of the space 261 in the direction of the axis O2 to the upper surface (the surface facing the upper side) 211 of the valve main body 2. Thus, in the first through hole 291, the liquid Q passes from the space 261 to the upper surface 211 of the valve body 2. As shown in fig. 7, the first through hole 291 has a first opening portion 294 that opens to the upper surface 211 of the valve body 2. Thus, the liquid Q passing through the first through hole 291 can flow out from the first opening 294 to the outside. The first opening 294 is disposed above the liquid level LS in the oil pan 10. The shape of the first through hole 291 is not particularly limited, and examples thereof include: straight, curved, bent, or a combination thereof.

The second through-hole 292 is provided at a position different from the first through-hole 291. The second through-hole 292 is disposed at a position on the X-axis direction negative side with respect to the first through-hole 291 in the present embodiment, but is not limited thereto. As shown in fig. 6, the second through hole 292 is provided from the upper surface 211 of the valve body 2 to the damper chamber 261 a. The second through hole 292 has a second opening 295 that opens to the upper surface 211 of the valve body 2. Thus, the liquid Q flows into the second through-hole 292 from the second opening 295, and thereafter passes through the damper chamber 261 a. The second opening 295 is disposed above the liquid level LS in the oil pan 10. The shape of the second through-hole 292 is not particularly limited, as with the first through-hole 291, and examples thereof include: straight, curved, bent, or a combination thereof.

As shown in fig. 3 and 4, the wall 293 protrudes toward the upper surface 211 of the valve body 2. The wall 293 surrounds both the first opening 294 of the first through-hole 291 and the second opening 295 of the second through-hole 292. Thus, the liquid Q flowing out of the first opening 294 can be guided by the wall 293 toward the second opening 295. Further, the liquid Q reaching the second opening portion 295 can flow in from the second opening portion 295. Thus, the return flow path 29 can return the liquid Q discharged from the damping chamber 261a by the movement of the spool 3 to the damping chamber 261 a. That is, the return flow path 29 can circulate the liquid Q between the inside of the damping chamber 261a and the outside of the damping chamber 261 a. Further, the liquid Q can be always filled in the damping chamber 261a by the circulation of the liquid Q. As a result, the vibration damping effect of the vibration damping chamber 261a is exhibited regardless of the posture of the vehicle on which the control valve 1 is mounted, and vibration (oil vibration) in the control valve 1 is reduced.

Further, among the liquid Q flowing out from the first opening 294, the liquid Q overflowing from the wall portion 293 until reaching the second opening 295, that is, the excessive liquid Q, is directly accumulated in the oil pan 10.

As shown in fig. 3, the second opening 295 is disposed at a position higher than the first opening 294. Accordingly, when the liquid Q passes through the inside of the wall portion 293 from the first opening portion 294 toward the second opening portion 295, the liquid Q must go up the curved inclined surface 296 between the first opening portion 294 and the second opening portion 295, and accordingly, excessive inflow to the second opening portion 295 can be prevented. This stabilizes the hydraulic pressure in the control valve 1. As shown in fig. 6, the second opening 295 is preferably disposed at the uppermost portion of the housing portion 26. This can more reliably prevent the liquid Q from flowing into the second opening 295 to an excessive extent.

As shown in fig. 4, the second opening portion 295 is smaller in size than the first opening portion 294. By defining the size relationship of the openings, excessive inflow of the liquid Q into the second opening 295 can be more reliably prevented. In the present embodiment, the shapes of the first opening 294 and the second opening 295 in plan view are circular, but the present invention is not limited thereto. When the first opening 294 and the second opening 295 are each circular in shape in plan view, the diameter of the second opening 295 is preferably 10% to 50%, more preferably 10% to 20%, of the diameter of the first opening 294.

When a line LN29 connecting the center of the first opening 294 and the center of the second opening 295 is assumed, a line LN29 intersects the axis O2 direction in plan view. Thus, the volume of the space surrounded by the wall 293 can be secured as large as possible, and the liquid Q can easily pass through the inside of the wall 293. The angle formed by line LN29 and axis O2 is not particularly limited. According to the present embodiment, the first opening portion 294 is not disposed coaxially with the solenoid valve (solenoid 4), and therefore, even if contaminants fall into the first opening portion 294, for example, the contaminants bite into the spool body 3 (spool valve) and stick (which may be referred to as sticking) to the spool, the risk is reduced.

As shown in fig. 3, the wall portion 293 has a height H294 on the first opening 294 side higher than a height H295 on the second opening 295 side. Thus, when the liquid Q passes through the first opening 294 toward the second opening 295, the excess portion of the liquid Q can be easily discharged to the outside of the wall 293. As described above, the remaining part of the liquid Q is accumulated in the oil pan 10.

The control valve of the present invention has been described above with respect to the illustrated embodiment, but the present invention is not limited to this, and each part constituting the control valve may be replaced with a member having an arbitrary configuration capable of performing the same function. In addition, any structure may be added.

The fixing member 7 is not limited to the nut 71, and may be a pin-shaped member such as a spacer-shaped nut (long nut) depending on the structure of the adjusting member 6.

The portion functioning as the vibration damping chamber 261a is a portion on the positive side in the X axis direction of the space 261, but is not limited thereto, and may be at least a portion of the space 261.

Claims (9)

1. A control valve, comprising:

a valve body including a housing portion having a space provided along an axial direction, and a plurality of flow paths connected to the space and through which liquid passes;

a spool body that is housed in the space so as to be movable in an axial direction, and switches between passage and blocking of the liquid between the space and each of the flow paths by the movement; and

a solenoid connected to one side of the housing in the axial direction and configured to move the spool by generating a magnetic force when energized;

at least a part of the space functions as a damping chamber that damps vibration generated when the liquid passes through,

the valve body has a return flow path provided in connection with the space to return the liquid discharged from the space to the damping chamber.

2. The control valve of claim 1, wherein the return flow path has: a first through hole penetrating from the space to an upper surface of the valve body; a second through hole provided at a position different from the first through hole, the second through hole penetrating from an upper surface of the valve body to the damper chamber; and a wall portion that protrudes toward the upper surface of the valve body and surrounds both a first opening portion of the first through hole that opens in the upper surface of the valve body and a second opening portion of the second through hole that opens in the upper surface of the valve body.

3. The control valve according to claim 2, characterized in that when a line connecting a center of the first opening portion and a center of the second opening portion is conceived, the line intersects an axial direction in a plane view.

4. The control valve according to claim 2, wherein the liquid passes from the space to an upper surface of the valve body in the first through hole, and passes from the upper surface of the valve body to the damper chamber in the second through hole,

the second opening is disposed at a position higher than the first opening.

5. The control valve according to claim 4, wherein the housing portion protrudes in a direction orthogonal to an axial direction,

the second opening is disposed at an uppermost portion of the housing portion.

6. The control valve of claim 4, wherein the size of the second opening portion is smaller than the size of the first opening portion.

7. The control valve according to claim 4, characterized in that a height of the wall portion on the first opening portion side is higher than a height of the wall portion on the second opening portion side.

8. The control valve according to claim 1, wherein the valve body is configured to be connectable with a plurality of the solenoids.

9. The control valve according to claim 2, wherein the control valve is used by being housed in a storage tank in which the liquid is stored,

the first opening and the second opening are each disposed above a liquid level in the storage tank.

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