JPH07260033A - Three-way solenoid valve - Google Patents

Abstract

PURPOSE:To enable attaching space to be decreased by shortening the axial length of a three-way solenoid valve. CONSTITUTION:A three-way solenoid valve 1 is for driving a clutch 9 by switching a passage of fluid through a process of moving a plunger 7 in the directions of respective arrow marks A, B by an electromagnetic solenoid 3 and a spring 5. In this three-way solenoid valve 1, the electromagnetic solenoid 3 is arranged on a solenoid valve main body 11 side, and a cylinder 15, a sleeve 17, and a connecting member 19 for connecting the cylinder and the sleeve 17 to each other are arranged in a hollow part 17 penetrating the solenoid valve main body 11, moreover, the plunger 7 provided with a poppet valve body 23 provided with a mover 29 made of magnetic substances on the outer periphery is slidably arranged in an approximately cylindrical moving hollow part 21 formed by the cylinder 15, the sleeve 17, and the connecting member 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-way solenoid valve used for driving a clutch of an automatic transmission or a power transmission device of an automobile, for example.

[0002]

2. Description of the Related Art Conventionally, a high-pressure fluid has been used as a drive source for driving an actuating means such as a clutch of an automobile. As a device for receiving the drive source and adjusting the fluid pressure of the actuating means, for example, A three-way solenoid valve such as the solenoid poppet valve described in Japanese Patent Laid-Open No. 4-181077 is used.

As shown in FIG. 4, this three-way solenoid valve includes a first passage P1 to which a fluid is supplied, a second passage P2 through which the fluid flows into and out of the clutch, and a second passage from which the fluid is discharged. And an electromagnetic solenoid P.
The duty ratio control for controlling the ratio of the supply time and the discharge time in a fixed cycle time by turning ON / OFF of No. 4 moves the mover P5 in the vertical direction in the figure and changes its flow path. That is, although the spool P7 is normally moved upward by the biasing force of the spring P6, when the electromagnetic solenoid P4 is energized, the spool P7 resists the biasing force of the spring P6 (push rod P8) according to the duty ratio. Through)
The spool P7 moves downward. Thereby, the flow path of the fluid is changed by the valve body P9 at the center of the spool P7,
The clutch is driven.

[0004]

However, the three-way solenoid valve having the above-mentioned structure is not necessarily suitable because it reciprocates the spool P7 via the mover P5 and the push rod P8.

That is, in this type of three-way solenoid valve, the mover P5 driven by the electromagnetic solenoid P4, the push rod P8, and the spool P7 are arranged in series in the axial direction. There is a problem in that the length in the direction cannot be shortened, and as a result, a large space for arranging the three-way solenoid valve is required.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a three-way solenoid valve which can shorten the axial length of the three-way solenoid valve and reduce the mounting space. And

[0007]

The invention according to claim 1 for attaining this object comprises a first passage to which a fluid is supplied,
A second passage through which the fluid flows into or out of the operating means, a third passage through which the fluid is discharged, and the second flow passage and the third flow passage due to the valve body being seated or separated from each other. A first valve seat that is blocked or communicated with each other; and a second valve seat that is blocked or communicated with the first flow passage and the second flow passage by seating or separating the valve body. A three-way electromagnetic valve for switching the flow path of the fluid by the movement of the valve element to drive the actuating means, wherein an electromagnetic solenoid is arranged in the outer peripheral direction of the valve element, and the valve element A mover that operates the electromagnetic solenoid to move the valve body itself is provided on the outer periphery of the valve body, and a piston slidably fitted in a cylinder is provided on one end side in the moving direction of the valve body, and the valve body is provided. The fluid through the first passage between the piston and the piston. And gist three way solenoid valve, characterized in that the.

A second aspect of the present invention is based on the three-way solenoid valve according to the first aspect, wherein the actuating means is a clutch. A third aspect of the present invention includes a first member having the first valve seat and a second member having the second valve seat.
And a third member that connects the first member and the second member with their axes aligned, and the third member is formed of a non-magnetic material. The three-way solenoid valve according to claim 1 is characterized in that

According to a fourth aspect of the present invention, the valve body is connected to the second valve.
The shaft portion protruding coaxially to the member side, and the shaft supporting member mounted inside the second member and slidably supporting the shaft portion. The gist is the three-way solenoid valve described in 3.

[0010]

In the three-way solenoid valve according to the first aspect of the present invention, since the electromagnetic solenoid for driving the valve body having the mover on the outer periphery is arranged around the valve body, the length in the axial direction is reduced. Shortened.

A first passage to which the fluid is supplied, a second passage through which the fluid flows into or out of the operating means, and a third passage from which the fluid is discharged are provided, and the fluid is the first passage. Is introduced between the valve body and the piston via the flow path of. Therefore, since the pressure of the supply fluid is applied to the inner surface of the piston and the inner surface of the valve body, the forces of both are almost cancelled, and the valve body and the piston can be moved smoothly with a slight force. is there. In this state, when the electromagnetic solenoid is energized, the exciting force is transmitted to the mover and the valve body moves. When the valve body is seated at the first valve seat by such an operation of the valve body so that the second flow passage and the third flow passage are communicated with each other, the fluid is discharged from the operating means. It Further, when the valve body is seated on the second valve seat so that the first flow path and the second flow path are communicated with each other, the (high-pressure) fluid is supplied to the operation means side to operate. The means are driven.

According to the second aspect of the present invention, the above-mentioned three-way solenoid valve can supply a large amount of fluid with a small exciting force due to its structure. Therefore, the actuating means to which the fluid is supplied has a large driving force. Even if it is a required clutch, it is possible to easily drive the clutch.

In the invention of claim 3, the third member is the first
The first member having the valve seat and the second member having the second valve seat are connected with their axes aligned, and the third member is formed of a non-magnetic material. Therefore, the structure of the solenoid valve can be simplified and made compact.

In the invention of claim 4, the shaft portion protruding from the valve body toward the second member is slidably supported by the shaft support member on the second member side, so that the position of the valve body. The accuracy is improved and the movement in the movement direction is smooth. Here, when controlling the three-way solenoid valve, so-called duty ratio control or ON / OFF control can be employed.
As the three-way solenoid valve, a method can be adopted in which the valve body is normally biased in a predetermined direction by a spring, and the valve body is driven against the biasing force of the spring when energizing the solenoid valve.

Further, it is preferable that a concave portion is formed on the outer periphery of the mover in the moving direction of the valve body so that the fluid flow becomes smooth and the movement of the valve body becomes smoother.

[0016]

Preferred embodiments of the present invention will be described below in order to further clarify the structure and operation of the present invention described above. (Embodiment 1) As shown in FIG. 1, in a three-way solenoid valve 1 of this embodiment, a solenoid 7 and a spring 5 are used to move a plunger 7 in the directions of arrows A and B to switch a fluid passage. The clutch 9 is driven.

Therefore, in the three-way solenoid valve 1, the solenoid 3 is arranged on the solenoid valve body 11 side (that is, the outer circumferential direction of the poppet valve body 23), and the solenoid valve body 11 is also provided.
In the through hole 13 penetrating the
A sleeve 17, which is a second member, and a connecting member 19, which connects the cylinder 15 and the sleeve 17, are arranged,
Further, the plunger 7 is slidably arranged in a hollow portion 21 having a substantially cylindrical shape formed by the cylinder 15, the sleeve 17 and the connecting member 19.

Each structure will be described in detail below. First, the cylinder 15 and the sleeve 17 are magnetic members having a substantially cylindrical shape, and they are connected by a connecting member 19 which is also a substantially cylindrical non-magnetic member, with their respective axes aligned.

The plunger 7 is a non-magnetic member integrally formed by connecting the poppet valve body 23 and the balancing piston 25 via a connecting portion 27 having a small diameter. On the outer circumference of the poppet valve element 23, a magnetic movable element 29 is externally fitted to operate the entire plunger 7. The mover 29 is a cylindrical body having a thick wall on the cylinder 15 side, and has three recesses 31 extending in the axial direction on its outer periphery, as shown in the I-I sectional view of FIG. 2A. Has been formed. Therefore, the fluid smoothly flows through the concave portion 31, so that the plunger 7 moves smoothly.
The end of the sleeve 17 on the poppet valve body 23 side is projected in a tubular shape so that the mover 29 is fitted and guided.

The piston 25 is a member that is slidable in the directions of arrows A and B in a substantially oil-tight state inside the cylinder 15, and is located between the piston 25 and the poppet valve body 23 (that is, around the connecting portion 27). High-pressure fluid is introduced into the). Further, since the same side surface of the piston 25 and the poppet valve body 23 have substantially the same area (approximately the same diameter), the pressure applied in the left-right direction is substantially balanced. Further, a spring 5 that biases the entire plunger 7 in the direction of arrow B is attached between the outside of the piston 25 and the end of the solenoid valve body 11.

A shaft portion 31 is formed so as to project from the shaft center of the poppet valve body 23 toward the sleeve 17, and the shaft portion 31 is slidably supported by a shaft support member 33. The shaft support member 33 is fixed in the sleeve 17, and as shown in FIG. 2B, is composed of an annular portion 33a to which the shaft portion 23 is fitted and an arm 33b protruding from the annular portion 33a to the periphery. It is configured.

In the three-way solenoid valve 1 having such a structure, a first passage (supply port) 41 to which a fluid is supplied and a second passage through which the fluid flows into or out of the clutch 9 are provided as a fluid flow path.
A passage (output port) 43 and a third passage (discharge port) 45 through which the fluid is discharged.

The supply port 41 is a port through which the fluid pumped up from the drain 49 by the pump 47 is sent through the pressure regulator 51, and the high-pressure fluid is the first opening provided in the solenoid valve body 11. 11a and cylinder 1
It is supplied to the periphery of the connecting portion 27 through the first recess 15a and the communication hole 15b provided in the No.

The output port 43 is a port formed by the second opening 11b provided in the solenoid valve body 11 and the second recess 15c provided in the cylinder 15, and is connected to the clutch 9 and the poppet valve body 23 side. It is in communication.
The discharge port 45 has a hollow portion 21 inside the sleeve 17.
Is used to connect the poppet valve body 23 side and the drain 49 side.

Then, the poppet valve body 23 of the cylinder 15
With the first valve seat 53 provided at the side end and the corresponding first poppet valve portion 55 of the poppet valve body 23,
The supply port 41 and the output port 43 are shut off and communicated with each other. The output port 43 and the discharge port 45 are provided by the second valve seat 57 provided at the end portion of the sleeve 17 on the poppet valve body 23 side and the corresponding second poppet valve portion 59 of the poppet valve body 23. Is cut off and communication is performed.

Next, the operation of the three-way solenoid valve 1 of the present embodiment having the above-mentioned structure will be described. Normally, the plunger 7 is moved in the direction of the arrow B by the urging force of the spring 5, so that the second portion of the poppet valve body 23 is moved.
The poppet valve portion 59 is seated on the second valve seat 57. Therefore, the supply port 41 and the output port 43 are communicated with each other, and the output port 43 and the discharge port 45 are blocked. Therefore, in this three-way solenoid valve 1, when the solenoid 3 is not energized, high-pressure fluid is supplied to the clutch 9 side.

The fluid is introduced from the supply port 41 between the piston 25 and the poppet valve body 23, and the left and right pressures are almost balanced, so that the plunger 7 can be moved with a slight force. It is possible. Next, when the electromagnetic solenoid 3 is driven by, for example, duty ratio control, the plunger 7 is driven according to the duty ratio. That is, when the electromagnetic solenoid 3 is energized, its exciting force is transmitted to the mover 29.
The mover 29 moves the entire plunger 7 in the direction of arrow A against the biasing force of the spring 5.

By this movement, the first poppet valve portion 55 of the poppet valve body 23 is seated on the first valve seat 53, so that the supply port 41 and the output port 43 are shut off and the output port 43 and the discharge port 43 are discharged. It communicates with the port 45. Therefore, the high-pressure fluid is not supplied to the clutch 9 side but discharged from the clutch 9 to the drain 49 side.

As described above, in the three-way solenoid valve 1 of this embodiment, the mover 29 is arranged on the outer circumference of the poppet valve body 23, and the electromagnetic solenoid 3 is arranged around the plunger 7 having the poppet valve body 23. However, since the plunger 7 is moved by the electromagnetic solenoid 3 via the mover 29, the axial length of the three-way electromagnetic valve 1 can be shortened,
Thereby, the remarkable effect that the mounting space of the three-way solenoid valve 1 itself can be reduced is exhibited.

Further, since the fluid is introduced from the supply port 41 between the piston 25 and the poppet valve body 23,
The plunger 7 can be moved with a slight force. As a result, the moving speed of the plunger 7, that is, the response speed of the valve operation of opening and closing the valve is improved.

Further, since the piston 25 fitted into the cylinder 15 plays a role of maintaining the weight balance with the poppet valve body 23, the plunger 7 is less likely to shake in the outer peripheral direction,
There is an advantage that it can move extremely smoothly in the directions of arrows A and B. Moreover, since the shaft portion 31 formed at the end of the plunger 7 is pivotally supported by the shaft support member 33,
Combined with the effect of the weight balance of the piston 25, the plunger 7 is further prevented from shaking, and smooth movement can be realized. (Embodiment 2) The three-way solenoid valve of this embodiment is the same as that of the embodiment 1
The configuration is similar to that of the first embodiment, except that the moving state of the plunger and the open / closed state of the flow path are opposite to those in the first embodiment. In this embodiment, different points will be described in detail.

As shown in FIG. 3, in the three-way solenoid valve 101 of this embodiment, the plunger 107 is moved in the directions of arrows B and A by the electromagnetic solenoid 103 and the spring 105, contrary to the first embodiment. The flow path of the fluid is switched to drive the clutch 109.

Each configuration will be described below. On the outer periphery of the poppet valve element 123 provided on the plunger 107, the movable element 1 made of a magnetic material is provided to drive the entire plunger 107.
29 is externally fitted. The mover 129 is a cylindrical body having a thick wall on the cylinder 115 side, and has 3
A recess 131 extending in the axial direction is formed at the location.
The end of the sleeve 117 on the poppet valve body 123 side is projected in a tubular shape so as to guide the mover 129 by external fitting.

A shaft portion 131 projects from the axis of the poppet valve body 123 toward the sleeve 117, and the shaft portion 131 is rotatably supported by a shaft support member 133. A concave locking portion 135 is attached to the tip of the shaft portion 131, and the locking portion 135 and the solenoid valve body 11 are attached.
A spring 105 for urging the entire plunger 107 in the arrow A direction is attached between the end 105 and the first end.

In the three-way solenoid valve 101 having such a structure,
As a fluid flow path, a first passage (supply port) 141 to which the fluid is supplied, a second passage (output port) 143 through which the fluid flows into or out of the clutch 109, and a third passage from which the fluid is discharged. A passage (exhaust port) 145 is provided.

Next, the operation of the three-way solenoid valve 101 of this embodiment will be described. Normally, the plunger 1 is forced by the urging force of the spring 105.
Since 07 moves in the direction of arrow A, the first poppet valve portion 155 is seated on the first valve seat 153. Therefore, the supply port 141 and the output port 143 are cut off, and the output port 143 and the discharge port 145 are connected. Therefore, when the electromagnetic solenoid 103 is not energized, the high pressure fluid is not supplied to the clutch 109 side.

Next, when the electromagnetic solenoid 103 is energized, its exciting force is transmitted to the mover 129, so that the mover 129 moves the entire plunger 107 in the direction of arrow B against the biasing force of the spring 105. . By this movement, the second poppet valve portion 159 of the poppet valve body 123 is seated on the second valve seat 157, whereby the supply port 14
1 is connected to the output port 143, and the output port 143 and the discharge port 145 are cut off. Therefore, the high-pressure fluid is supplied to the clutch 109 side, and the clutch 109 is driven.

In this way, the three-way solenoid valve 101 of this embodiment is
Has a configuration opposite to that of the first embodiment with respect to the biasing direction and the like, but has the same effect as that of the first embodiment. It should be noted that the present invention is not limited to the above-mentioned embodiments and can be of course implemented in various modes within the scope of the gist of the present invention.

[0039]

As described above in detail, in the invention of claim 1, the mover is arranged on the outer periphery of the valve body, and the electromagnetic solenoid is arranged in the outer peripheral direction of the valve body provided with the mover. Since the valve body is moved by the electromagnetic solenoid, the axial length of the three-way electromagnetic valve can be shortened, and the mounting space for the three-way electromagnetic valve can be reduced. Also, a first passage to which the fluid is supplied and a second passage through which the fluid flows into or out of the operating means.
Is provided and a third passage through which the fluid is discharged, and since the fluid is introduced between the valve body and the piston through the first flow path, the valve body and the piston can be operated with a slight force. The piston can be moved smoothly. As a result, there is an advantage that the response speed of the valve element is fast and can be controlled quickly.

According to the second aspect of the present invention, the above-mentioned three-way solenoid valve can supply a large amount of fluid with a small exciting force due to its structure. Therefore, the actuating means to which the fluid is supplied requires a large driving force. Even if it is a clutch, it can be easily driven. In the invention of claim 3, the third member connects the first member having the first valve seat and the second member having the second valve seat with their axes aligned. Moreover, since the third member is formed of a non-magnetic material, the structure of the solenoid valve can be simplified and made compact.

According to the invention of claim 4, the shaft portion projecting from the valve body toward the second member is slidably supported by the shaft supporting member on the second member side. There is an advantage that the accuracy is improved and the movement in the movement direction is smooth.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a cross section of a three-way solenoid valve according to a first embodiment.

2A is a cross-sectional view showing a II cross section of a mover, and FIG. 2B is a front view of a shaft support member.

FIG. 3 is an explanatory diagram showing a cross section of a three-way solenoid valve according to a second embodiment.

FIG. 4 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

1, 101 ... Three-way solenoid valve, 3, 103 ... Electromagnetic solenoid, 5, 105 ... Spring, 7, 107 ... Plunger, 15, 115 ... Cylinder, 23, 123 ...
Valve element, 29,129 ... mover, 41,141 ... first passage (supply port), 43,143 ... second passage (output port), 45,145 ... third passage (exhaust port), 5
3, 153 ... First valve seat, 57, 157 ... Second valve seat

Claims (4)

[Claims] 1. A first passage to which a fluid is supplied, a second passage through which a fluid flows into or out of an operating means, a third passage from which a fluid is discharged, and a valve body seated or separated from each other. The first flow path and the second flow path are blocked or communicated with each other by the first valve seat and the first flow path and the second flow path are seated or separated from each other. A three-way electromagnetic valve for driving the actuating means by switching the flow passage of the fluid by the movement of the valve body, the second valve seat having a flow passage shut off or in communication with each other; An electromagnetic solenoid is arranged in the outer peripheral direction of the valve body, and a mover for moving the valve body itself by the electromagnetic solenoid is provided on the outer periphery of the valve body, and a cylinder is provided at one end side in the moving direction of the valve body. The valve body is provided with a slidably inserted piston. Three-way solenoid valve, characterized in that the introduction of fluid through said first passage between the piston. 2. The three-way solenoid valve according to claim 1, wherein the actuating means is a clutch. 3. A first member having the first valve seat, a second member having the second valve seat, an axial center of the first member and the second member. The three-way solenoid valve according to claim 1, further comprising a third member connected in a combined state, wherein the third member is formed of a non-magnetic material. 4. A shaft portion that coaxially projects from the valve body toward the second member, and a shaft support member that is mounted inside the second member and slidably supports the shaft portion. The three-way solenoid valve according to claim 3, further comprising: