JP4692293B2 - Solenoid valve device - Google Patents

Description

  The present invention relates to an electromagnetic valve device in which a valve body and a valve inserted into the valve body are fixed by a pin.

The prior art will be described with reference to FIGS.
The electromagnetic valve device 100 includes a valve 101 fixed to a valve body 102.
The valve 101 includes a valve portion 103 (for example, a spool valve) and an actuator portion 104 (for example, an electromagnetic actuator). The valve portion 103 is inserted into the valve body 102 and fixed.
Conventionally, clamp fixing (refer to Patent Document 1) and pin fixing (refer to Patent Document 2) are employed for fixing the valve 101 and the valve body 102.

As shown in FIG. 5, the clamp fixing means that a facing groove 106 is provided in a housing 105 (for example, a sleeve) of the valve portion 103, and the valve portion 103 is inserted into the valve body 102, and outside the valve body 102. The clamp 107 is fitted into the facing groove and fixed.
As shown in FIG. 6, the pin fixing means that a pin groove 108 is provided in the housing 105, and in a state where the valve portion 103 is inserted into the valve body 102, the pin hole 109 is opened in the valve body 102. The pin 110 is inserted so as to pass through the pin groove 108 and fixed.

Pin fixing is often used because cost can be suppressed. However, in pin fixing, the contact between the pin 110 and the housing 105 is a line contact, and the contact with the housing 105 is a surface contact. There is a problem that the stress of the contact portion becomes larger than that of the clamp fixing.
In particular, the stress acting on the fixed part of the valve 101 and the valve body 102 has been increasing due to an increase in the solenoid size and weight in response to the performance improvement requirements such as AT, and an increase in vibration due to an improvement in engine output. The problem that the stress at the contact portion increases during fixing cannot be ignored.

  In the conventional pin fixing, the pin groove 108 formed on the outer periphery of the housing 105 is composed of only planes whose groove side surfaces are perpendicular to the axial direction of the valve portion 103 and are parallel to each other (FIGS. 7A and 7B). reference). When the pin 110 comes into contact with the side surface of the groove, the edge portion 111 formed between the side surface of the groove and the outer peripheral surface of the housing 105 comes into contact at a position where the axial center of the pin 110 and the outer peripheral surface of the housing 105 intersect (FIG. 7). (See (b) and (c)). For this reason, the contact stress at the edge portion 111 increases, and the edge portion 111 may be lost. Then, there is a concern that the fragments that fall off due to the defect may become a foreign substance and adversely affect the performance of the electromagnetic valve device 100, the engine to which the electromagnetic valve device 100 is attached, or the AT.

As a countermeasure for this problem, it is conceivable to chamfer the edge portion 111. According to this, since the chamfered portion is formed between the groove side surface and the outer peripheral surface of the housing 105 (see FIGS. 8A and 8B), the shaft of the pin 110 is inserted when the pin 110 is inserted. There is no contact between the outer peripheral surface of the housing 105 and the pin 110 at the position where the core and the outer peripheral surface of the housing 105 intersect (see FIGS. 8B and 8C), and a part of the housing 105 may be lost. Is reduced. However, if the conventional pin groove 108 is not subjected to chamfering, as shown in FIG. 7 (d), the machining trajectory by the cutting tool has only been reciprocated once, but chamfering is added. Therefore, it is necessary to change the cutting tool, etc., and it takes time and labor for processing, resulting in a problem that costs increase.
JP 2002-156063 A Japanese Patent Laid-Open No. 2003-49802

  Accordingly, the present invention has been made to solve the above-described problems, and in a solenoid valve device that fixes a valve to a valve body with a pin, the loss of the housing is prevented without increasing the cost. An object of the present invention is to provide an electromagnetic valve device that can be pinned.

[Means of Claim 1]
According to the solenoid valve device according to claim 1, Ru comprising a valve body having a valve insertion hole, a valve having a valve portion to be inserted into the valve insertion hole, and a pin for securing the valve to the valve body. The valve portion has a cylindrical housing, and has a groove extending in a direction orthogonal to the axial direction of the valve portion on the outer peripheral surface of the housing, and the pin is orthogonal to the axial direction of the valve portion in the valve body. In the electromagnetic valve device in which the valve is fixed to the valve body by being inserted along the direction and engaging with the groove, the groove width increases in the groove width direction from the middle part in the groove direction toward both ends. The groove width at the position where the axial center line of the pin and the outer peripheral surface of the housing intersect when the pin is inserted is larger than the groove width at the intermediate portion.

That is, the groove width of the groove into which the pin is inserted gradually increases from the middle part of the groove toward both ends, and the groove width at the position where the axial center line of the pin and the outer peripheral surface of the housing intersect is the middle of the groove. It is larger than the groove width of the part. For this reason, the pin only comes into contact with the side surface of the groove at the middle portion of the groove, and the pin does not contact the side surface of the groove because the groove width is wide at the position where the axial center line of the pin and the outer peripheral surface of the housing intersect.
This prevents the pin from coming into contact with the edge formed between the outer peripheral surface of the housing and the side surface of the groove at the position where the axial center line of the pin and the outer peripheral surface of the housing intersect, and the loss of the housing due to increased stress. To prevent.
Further, there is no need for chamfering and the cost is not increased.

[Means of claim 2]
According to the electromagnetic valve device of claim 2, the groove has a parallel groove portion formed in a plane parallel to each other at a groove side surface perpendicular to the axial direction of the valve portion at the groove intermediate portion. At both end portions in the direction, there are enlarged groove portions in which the groove width increases in a taper shape from the parallel groove portion toward both ends in the groove direction.
Thus, in addition to the function and effect of claim 1, since the side surface of the groove that contacts the pin is a flat surface, stress concentration occurs at the contact portion as compared with the case where it is supported at the top of the arc or supported at the corner. Absent.

[Means of claim 3]
According to the electromagnetic valve device of the third aspect, the boundary between the parallel groove portion and the enlarged groove portion is a straight line perpendicular to the groove direction, and the distance L1 between the boundary and the intermediate position of the parallel groove portion in the groove direction is determined by the housing. It is smaller than the distance L between the position where the axial center line of the pin intersects with the outer peripheral surface of the housing and the intermediate position when it rotates to the maximum in the circumferential direction.
Since a gap may be formed between the pin and the groove in consideration of a dimensional tolerance, a thermal expansion difference, or the like, the housing may rotate. Therefore, even when the housing rotates, by setting the position of the boundary line between the parallel groove portion and the enlarged groove portion so that the position where the axial center line of the pin and the outer peripheral surface of the housing intersect is within the range of the enlarged groove portion, The pin does not collide with an edge formed between the outer peripheral surface of the housing and the side surface of the groove, thereby preventing the housing from being damaged due to an increase in stress.

Solenoid valve device of the best mode 1, Ru comprises a valve body having a valve insertion hole, a valve having a valve portion to be inserted into the valve insertion hole, and a pin for securing the valve to the valve body. The valve portion has a cylindrical housing, and has a groove extending in a direction orthogonal to the axial direction of the valve portion on the outer peripheral surface of the housing, and the pin is orthogonal to the axial direction of the valve portion in the valve body. In the electromagnetic valve device in which the valve is fixed to the valve body by being inserted along the direction and engaging with the groove, the groove width increases in the groove width direction from the middle part in the groove direction toward both ends. The groove width at the position where the axial center line of the pin and the outer peripheral surface of the housing intersect when the pin is inserted is larger than the groove width at the intermediate portion.
The groove has a parallel groove portion having a flat side surface at a middle portion in the groove direction and having a side surface perpendicular to the axial direction of the valve portion and parallel to each other, and at both ends in the groove direction, both ends in the groove direction from the parallel groove portion. The groove width increases in a taper shape as it goes to.
The boundary between the parallel groove portion and the enlarged groove portion is a straight line perpendicular to the groove direction, and the distance L1 between the boundary and the intermediate position in the groove direction of the parallel groove portion is the axis of the pin when the housing rotates to the maximum in the circumferential direction. It is smaller than the distance L between the position where the core wire and the outer peripheral surface of the housing intersect and the intermediate position.

[Configuration of Example 1]
The configuration of the solenoid valve device 1 according to the first embodiment will be described with reference to FIGS.
The solenoid valve device 1 according to the first embodiment includes a solenoid valve 2 that performs on / off and adjustment of hydraulic pressure in a hydraulic circuit (for example, a hydraulic control circuit of a vehicle automatic transmission), and a valve body 3 to which the solenoid valve 2 is fixed. And a pin 4 for fixing the solenoid valve 2 to the valve body 3.

The solenoid valve 2 includes a spool valve 7 (an example of a valve portion of the present invention) and an electromagnetic actuator 8.
The spool valve 7 includes a sleeve 9 (an example of the housing of the present invention) formed in a cylindrical shape with an aluminum material, and a plurality of input / output formed in the sleeve 9 by sliding in the axial direction inside the sleeve 9. It comprises a spool (not shown) that opens and closes a port (not shown) and changes the direction of oil flow by changing the communication state of the input / output port.
In the sleeve 9, a groove 12 extending in a direction orthogonal to the axial direction of the spool valve 7 is formed on the outer peripheral surface 9 a.

The electromagnetic actuator 8 includes an electromagnetic solenoid that generates a magnetic force when energized, and a plunger (not shown) that is displaced in the axial direction by the magnetic force generated by the electromagnetic solenoid.
The plunger moves integrally with the spool inside the spool valve 7 and controls the axial movement of the plunger by the magnetic force generated by the electromagnetic solenoid, thereby controlling the axial position of the spool.
In this embodiment, the electromagnetic actuator 8 is provided coaxially with the spool valve 7.

The valve body 3 is made of aluminum die cast, and has a valve insertion hole 13 into which a spool valve 7 having a cylindrical sleeve 9 is inserted.
The valve body 3 is provided with a pin hole 14 so as to intersect the valve insertion hole 13. A pin 4 for inserting and fixing the spool valve 7 into the valve insertion hole 13 is inserted into the pin hole 14 concentrically.

The pin 4 is made of bearing steel.
The pin 4 is inserted into a passage extending in a direction perpendicular to the axial direction of the spool valve 7 formed by the groove 12 formed in the sleeve 9 and the pin hole 14 with the spool valve 7 inserted into the valve insertion hole 13. Is done. As a result, the solenoid valve 2 is fixed to the valve body 3.

Next, the groove 12 which is a feature of the present embodiment will be described in detail.
The groove 12 extends on the outer peripheral surface 9 a of the sleeve 9 in a direction orthogonal to the axial direction of the spool valve 7.
In addition, the groove width of the groove 12 gradually increases on both sides in the groove width direction from the intermediate portion in the groove direction (the direction in which the groove 12 extends) toward both ends.

  Specifically, the groove 12 has parallel groove portions 19 in the intermediate portion in the groove direction, and the groove width increases in a taper shape toward both ends in the groove direction from the parallel groove portions 19 at both ends in the groove direction. A groove 20 is provided. The groove side surfaces 21 of the parallel groove portions 19 are formed of flat surfaces that are perpendicular to the axial direction of the spool valve 7 and are parallel to each other. Further, the groove side surface 22 of the enlarged groove portion 20 intersects the groove side surface 21 of the parallel groove portion 19 at an obtuse angle. Further, the groove bottom surface 23 is a flat surface provided at right angles to the groove side surface 21 and the groove side surface 22. The boundary 26 between the parallel groove portion 19 and the enlarged groove portion 20 is a straight line perpendicular to the groove direction.

When viewed from the axial direction, the groove width W2 at the position where the axial center line of the pin 4 and the outer peripheral surface 9a of the sleeve 9 intersect (the black triangle mark position) is larger than the groove width W1 at the parallel groove portion 19. (See FIG. 2).
In addition, the groove width W1 in the parallel groove portion 19 is larger than the outer diameter of the pin 4 in consideration of a dimensional tolerance, a thermal expansion difference, and the like. Therefore, the sleeve 9 can move slightly in the axial direction, and the pin 4 is not always located at the center in the groove width direction of the groove 12 but at either end in the groove width direction. As shown to 2 (a), it may contact one groove | channel side surface 21 of the parallel groove part 19. FIG.
In this case, as shown in FIG. 2C, the pin 4 and the sleeve 9 are only in contact with each other at the groove side surface 21, and the groove side surface 22 intersecting the groove side surface 21 at an obtuse angle, The pin 4 does not come into contact with the corner between the outer peripheral surface 9a. Therefore, there is no fear that the sleeve 9 is lost.

  In addition, as shown in FIG. 3, the groove 12 has a machining trajectory by a cutting tool that only requires a single reciprocating movement as in the conventional machining without chamfering. Thus, an increase in cost is suppressed.

  As shown in FIG. 4, the sleeve 9 may rotate around the axis by utilizing the gap between the pin 4 and the groove bottom surface 23. The gap between the pin 4 and the groove bottom surface 23 is provided in consideration of dimensional tolerance, thermal expansion difference, and the like.

  Assuming that the distance between the intermediate position of the sleeve 9 and the boundary 26 is L1, the distance L1 is such that the axial center line of the pin 4 and the outer peripheral surface of the sleeve 9 intersect when the sleeve 9 rotates to the maximum in the circumferential direction. This distance is set to be smaller than the distance L between the position of the sleeve 9 and the intermediate position of the sleeve 9 (see FIG. 4B). In this embodiment, as shown in FIG. 4A, the intermediate position in the groove direction of the parallel groove portion 19 exists on the radial center line of the sleeve 9 perpendicular to the groove direction.

The distance L can be calculated as follows.
The diameter of the sleeve 9 is D, and the diameter of the pin 4 is d. A distance between the radial center of the sleeve 9 and the axis of the pin 4 is a distance A, and a distance between the radial center of the sleeve 9 and the groove bottom surface 23 of the groove 12 is a distance B.
As shown in FIG. 4B, in this embodiment, the case where the pin 4 rotates until a part of the pin 4 comes into contact with the groove bottom surface 23 is a case where the pin 4 rotates to the maximum. Hereinafter, a method for calculating the distance L will be described with reference to FIG.

Let θ be the rotation angle when the rotation is maximum.
If the position where the axis of the pin 4 intersects with the outer peripheral surface of the sleeve 9 after rotation is defined as the P position, the line connecting the center of the sleeve 9 and the P position and the diameter of the sleeve 9 perpendicular to the groove direction. An angle formed with the center line of the direction is an angle γ.
When the contact position between the rotated pin 4 and the groove bottom surface 23 is the Q position, the line connecting the center of the sleeve 9 and the Q position and the radial center of the sleeve 9 perpendicular to the axial center line of the pin 4 An angle formed with the line is defined as an angle β.
The angle formed between the line connecting the center of the sleeve 9 and the Q position and the radial center line of the sleeve 9 parallel to the groove direction is defined as an angle α.

In this case, the distance L is given by the geometric relationship:
L = (D / 2) × sin γ
Meet. Where the angle γ is
γ = arccos {A / (D / 2)} − θ
Meet. The rotation angle θ is
θ = 90 ° -α-β
Where angle α and angle β are respectively
α = arcsin {B / (D / 2)}
β = arccos {(A− (d / 2)) / (D / 2)}
Is required.

  The distance L1 is set to be smaller than the distance L obtained from the above relationship. Thereby, even when the sleeve 9 has been rotated, the position where the axial center line of the pin 4 and the outer peripheral surface 9 a of the sleeve 9 intersect is within the range of the enlarged groove portion 20.

  In this embodiment, since the sleeve 9 is cylindrical, the distance L is calculated as described above. However, the sleeve 9 has an elliptical cylindrical shape and a polygonal columnar shape, and is not limited to this method. The distance L1 is set to be smaller than the distance L between the P position where the axial center line of the pin 4 intersects the outer peripheral surface of the sleeve 9 and the intermediate position of the sleeve 9 when the sleeve 9 rotates to the maximum in the circumferential direction. It only has to be.

[Effect of Example 1]
The groove 12 gradually increases in width toward both sides in the groove width direction from the intermediate portion in the groove direction (direction in which the groove 12 extends) toward both ends, and the axial center line of the pin 4 and the outer peripheral surface 9a of the sleeve 9 At the position where the crosses, the width is wider than the middle part.
As a result, even when contacting one groove side surface 21 of the parallel groove portion 19, the pin 4 and the sleeve 9 are only in contact with the groove side surface 21. At the position where the surface 9a intersects, it does not contact the edge formed between the outer peripheral surface 9a of the sleeve 9 and the groove side surface 22, and the sleeve 9 is prevented from being damaged due to increased stress.
And compared with the case where chamfering is performed, the cost is not increased.

In addition, as the structure which the groove | channel width expands gradually to both sides of a groove width direction as it goes to both ends from the intermediate part of a groove | channel direction (direction where the groove | channel 12 is extended), the groove | channel 12 makes a side surface of the groove | channel 12 a circular arc surface. A configuration or the like may be used.
However, as in this embodiment, it is preferable that the groove 12 includes the parallel groove portion 19 and the enlarged groove portion 20 whose groove width is increased in a tapered shape. According to this, since the groove side surfaces 21 of the parallel groove portions 19 are planes parallel to each other, the pins 4 are supported by the surfaces, so that stress concentration occurs compared to the case where the grooves are supported at the top of the arc or supported at the corners. Absent.

When the distance between the intermediate position of the sleeve 9 and the boundary 26 is L1, the distance L1 is the distance between the axial center line of the pin 4 and the outer peripheral surface of the sleeve 9 when the sleeve 9 rotates to the maximum in the circumferential direction. Is set to be smaller than the distance L between the position where the two intersect and the intermediate position of the sleeve 9.
As a result, even when the sleeve 9 is rotated, the position where the axial center line of the pin 4 and the outer peripheral surface 9 a of the sleeve 9 intersect is within the range of the enlarged groove portion 20. The edge formed between the surface 9a and the groove side surface 22 is not hit, and the sleeve 9 is prevented from being lost.

[Modification]
In the above embodiment, the solenoid valve 2 in the hydraulic control circuit of the vehicle automatic transmission is fixed to the valve body 3, but the hydraulic control circuit of the valve timing variable device that adjusts the advance amount of the camshaft. The present invention may be applied when fixing other solenoid valves such as OCV. Further, the valve portion (spool valve in this embodiment) may be applied to all valves inserted into the valve body.

The block diagram of a solenoid valve apparatus (Example 1). (A) is a side part enlarged view of the engaging part of a groove | channel and a pin, (b) is a cross-sectional view of (a), (c) is the important point of the EE cross section of (b). (Example 1) which is a part enlarged view. It is explanatory drawing of the process locus at the time of the process of a groove | channel (Example 1). It is a cross-sectional view of a solenoid valve device, (a) is in a normal state, (b) is during rotation (Example 1). (A) is a side view of a solenoid valve device in which clamp fixing is adopted, and (b) is a cross-sectional view of the main part of (a) (conventional example). (A) is a side view of a solenoid valve device in which pin fixing is adopted, and (b) is a cross-sectional view of the main part of (a) (conventional example). (A) is a side part enlarged view of the engaging part of a pin groove and a pin in the conventional pin fixation, (b) is a cross-sectional view of (a), (c) is (b) FIG. 4D is an enlarged view of a main part of the EE cross section of FIG. 5, and FIG. (A) is a side part enlarged view of the engaging part of a pin groove and a pin in the conventional pin fixation, (b) is a cross-sectional view of (a), (c) is (b) It is a principal part enlarged view of the EE cross section of (conventional example).

Explanation of symbols

1 Solenoid valve device 2 Solenoid valve (valve)
3 Valve body 4 Pin 7 Spool valve (valve part)
8 Electromagnetic actuator 9 Sleeve (housing)
9a Sleeve outer peripheral surface 12 Groove 13 Valve insertion hole 19 Parallel groove portion 20 Enlarged groove portion 21 Groove side surface 26 Boundary L1 Distance between the boundary and the intermediate position in the groove direction of the parallel groove portion L When the sleeve rotates to the maximum in the circumferential direction The distance between the position where the shaft center line and the outer peripheral surface of the sleeve intersect and the intermediate position

Claims (3)

A valve body having a valve insertion hole;
A valve having a valve portion inserted into the valve insertion hole;
A pin for fixing the valve to the valve body;
The valve portion has a cylindrical housing, and has a groove extending in a direction orthogonal to the axial direction of the valve portion on an outer peripheral surface of the housing.
In the electromagnetic valve device in which the pin is inserted into the valve body along a direction orthogonal to the axial direction of the valve portion, and the valve is fixed to the valve body by engaging with the groove.
The groove gradually expands on both sides in the groove width direction from the intermediate part in the groove direction toward both ends,
The solenoid valve device according to claim 1, wherein a groove width at a position where an axial center line of the pin and an outer peripheral surface of the housing intersect when the pin is inserted is larger than a groove width at the intermediate portion. The electromagnetic valve device according to claim 1,
The groove is
In the intermediate portion in the groove direction, the groove side surface has a parallel groove portion composed of planes perpendicular to the axial direction of the valve portion and parallel to each other,
An electromagnetic valve device characterized in that at both ends in the groove direction, there are enlarged groove portions whose groove width increases in a taper shape from the parallel groove portion toward both ends in the groove direction. The electromagnetic valve device according to claim 2,
The boundary between the parallel groove portion and the enlarged groove portion is a straight line perpendicular to the groove direction,
The distance L1 between the boundary and the intermediate position in the groove direction of the parallel groove portion is:
An electromagnetic valve device having a distance smaller than a distance L between a position where an axial center line of the pin intersects with an outer peripheral surface of the housing and the intermediate position when the housing rotates to the maximum in a circumferential direction. .

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