JP6160121B2 - Strainer mounting structure of solenoid valve - Google Patents

Description

  The present invention relates to a strainer mounting structure for mounting a strainer to an opening of a port such as an input port and an output port formed on a sleeve of a solenoid valve (solenoid valve such as a pressure control valve and a flow rate control valve).

Conventionally, as shown in FIGS. 6 and 7, a circular cross section is formed on the outer peripheral surface portion of the sleeve 121 corresponding to the opening of the port 130 such as an input port and an output port formed on the sleeve 121 of the solenoid valve. Alternatively, the strainer 170 mounted on the arcuate strainer mounting portion 160 has a uniform radius of curvature r ′ in the cross section from the center region to both ends of the opening region, and the curvature radius Ra of the cross section of the strainer mounting portion 160. It is set appropriately smaller than '.
When the strainer 170 is mounted on the strainer mounting portion 160, first, the interval dimension Wa ′ between both ends of the opening region of the strainer 170 is appropriately larger than the diameter dimension 2Ra ′ of the strainer mounting portion 160. In the state of being expanded and deformed, it is fitted into the outer peripheral surface of the strainer mounting portion 160. Thereafter, by releasing the strainer 170, the strainer 170 is mounted on the strainer mounting portion 160 by its own restoring force.
Moreover, as a strainer mounting structure of a solenoid valve, it is disclosed by patent document 1, for example.

JP 2006-258161 A

By the way, in the conventional solenoid valve strainer mounting structure as shown in FIGS. 6 and 7, when the strainer 170 is mounted on the strainer mounting portion 160, the distance between both ends of the opening area of the strainer 170 is measured. When Wa ′ is expanded and deformed so as to be appropriately larger than the diameter 2Ra ′ of the strainer mounting portion 160, a plastic region A ′ (for example, two in FIG. 6) is formed in a part of the central region of the strainer 170. A portion surrounded by a dotted line may occur.
In addition, the larger the both ends of the opening area of the strainer 170 are, the larger the range of the plastic area A becomes.
For this reason, after the strainer 170 is fitted to the outer peripheral surface of the strainer mounting portion 160, the strainer 170 is mounted on the strainer mounting portion 160 by its own restoring force, as shown in FIG. The central part P1 of the central part region and both ends P2 of both opening part regions are attached in contact with the strainer attaching part 160. A large gap S ′ is generated between the strainer 170 and the strainer mounting portion 160, and the strainer 170 expands in the radial direction from the outer peripheral surface of the strainer mounting portion 160 by an amount corresponding to the gap S ′. The strainer 170 protrudes outward in the radial direction from the outer peripheral surface 121a.
Therefore, after the strainer 170 is mounted on the strainer mounting portion 160 of the solenoid valve sleeve 121, when the solenoid valve sleeve 121 is inserted into, for example, a built-in portion of the CVT valve body, the strainer 170 protrudes in the radial direction. Becomes a hindrance and the installation work becomes troublesome. In addition, there is a concern that the strainer 170 may be displaced with respect to the strainer mounting portion 160 or an assembly failure such as the strainer 170 may be detached from the strainer mounting portion 160 and detached.

  In view of the above problems, an object of the present invention is to provide a strainer mounting structure for an electromagnetic valve capable of suppressing the strainer from protruding radially outward with respect to the outer peripheral surface of a sleeve.

In order to solve the above-mentioned problem, a strainer mounting structure for an electromagnetic valve according to claim 1 of the present invention is for mounting a strainer on an opening of a port such as an input port and an output port formed in a sleeve of the electromagnetic valve. A strainer mounting structure,
On the outer peripheral surface of the sleeve corresponding to the opening of the port, a circular or arcuate strainer mounting portion is formed in a cross section,
The strainer is formed in a C-shaped cross section by a leaf spring material, has a central region, and both opening regions formed continuously at both ends of the central region,
The radius of curvature of the cross section of the central region is set smaller than the radius of curvature of the cross section of the strainer mounting portion,
The curvature radii of the two opening regions are set to be larger than the curvature radii of the central region and to be equal to or less than the curvature radii of the cross section of the strainer mounting portion.

According to the above configuration, when the strainer is mounted on the strainer mounting portion, first, the distance dimension between both ends of the opening area of the strainer is expanded and deformed so as to be appropriately larger than the diameter dimension of the strainer mounting portion. In this state, the strainer is fitted to the outer peripheral surface of the strainer mounting portion, and then the strainer is released, so that the strainer is mounted to the strainer mounting portion by its own restoring force.
In a state where the strainer is mounted on the outer peripheral surface of the strainer mounting portion by its own restoring force, the curvature radius of both the opening region of the strainer is larger than the curvature radius of the central region and the curvature of the cross section of the strainer mounting portion. It is set below the radius. For this reason, both opening part area | regions of a strainer are mounted close to the circular arc surface of a strainer mounting part.
As a result, when the space between both ends of the strainer is expanded and deformed so that the distance between both ends of the strainer is appropriately larger than the diameter of the strainer mounting portion, plastic deformation occurs in a part of the central region of the strainer. Even if a plastic region is generated, the gap generated between the strainer and the strainer mounting portion can be kept small.
As a result, the strainer can be prevented from protruding radially outward from the outer peripheral surface of the sleeve. Therefore, when the sleeve of the solenoid valve is inserted into, for example, a built-in portion of the valve body of the CVT, As a result, it is possible to prevent the protruding portion from becoming an obstruction, and assembling work is facilitated.

The strainer mounting structure for a solenoid valve according to claim 2 is the strainer mounting structure for a solenoid valve according to claim 1,
The radius of curvature of the opening region is set to be approximately equal to the radius of curvature of the cross section of the trainer mounting portion.

  According to the above configuration, the curvature radii of both opening regions of the strainer are set to be substantially equal to the curvature radii of the cross section of the strainer mounting portion, so that both opening regions of the strainer abut the arc surface of the strainer mounting portion. Installed in contact. Thereby, it is possible to further effectively suppress the strainer from protruding outward from the outer peripheral surface of the sleeve in the radial direction.

The electromagnetic valve strainer mounting structure according to claim 3 is the electromagnetic valve strainer mounting structure according to claim 1 or 2,
The strainer mounting portion is constituted by a strainer mounting groove that is circular or arcuate in a cross section that is recessed with a groove width dimension slightly larger than the plate width dimension of the strainer on the outer peripheral surface of the sleeve. .

According to the above configuration, since the strainer is mounted on the strainer mounting groove having a groove width dimension slightly larger than the plate width dimension of the strainer, the movement of the strainer in the axial direction is restricted. Can be prevented from being displaced unexpectedly.
Further, by mounting the strainer in the strainer mounting groove, it is possible to suppress the strainer from protruding outward in the radial direction with respect to the outer peripheral surface of the sleeve by an amount corresponding to the groove depth of the strainer mounting groove.

The strainer mounting structure for a solenoid valve according to claim 4 is the strainer mounting structure for a solenoid valve according to claim 3,
The groove depth dimension of the strainer mounting groove is set larger than the plate thickness dimension of the strainer.

  According to the above configuration, since the groove depth dimension of the strainer mounting groove is set to be larger than the plate thickness dimension of the strainer, it is effective in suppressing the strainer from protruding outward in the radial direction with respect to the outer peripheral surface of the sleeve.

It is a longitudinal cross-sectional view which shows the state with which the strainer mounting part corresponding to the output port of the sleeve of the solenoid valve which concerns on Example 1 of this invention, and the opening part of an input port was mounted | worn. It is a cross-sectional view which follows the II-II line | wire of FIG. 1 which shows the state in which the strainer was similarly mounted in the strainer mounting part. It is a perspective view which shows a strainer single-piece | unit similarly. It is a cross-sectional view showing a strainer alone. Similarly, it is a cross-sectional view showing a state in which the distance between both ends of both opening regions of the strainer is expanded and deformed so as to be appropriately larger than the diameter of the strainer mounting portion. It is a cross section which expands and shows the state by which the strainer was mounted | worn by the conventional strainer mounting part. Similarly, it is a cross-sectional view showing a state in which the distance between both ends of both opening regions of the strainer is expanded and deformed so as to be appropriately larger than the diameter of the strainer mounting portion.

  A mode for carrying out the present invention will be described in accordance with an embodiment.

A first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the electromagnetic valve includes a solenoid unit 10 and a spool unit 20.
The solenoid unit 10 is configured by arranging a coil, a stator core, a plunger 14 and the like in a case body 11.

The spool unit 20 includes a sleeve 21 and a spool 50. The sleeve 21 has a center hole 22 and is formed in a cylindrical shape, and one end thereof is fixed to the end of the case body 11 by caulking or the like. A plurality of valve holes 23, 24, and 25 are formed in the center hole 22 of the sleeve 21 in the axial direction.
Further, the sleeve 21 is formed with ports such as an output port 30 and an input port 40 communicating with the central hole 22 at predetermined intervals in the axial direction.

As shown in FIG. 1, a spool 50 is disposed in the center hole 22 of the sleeve 21 so as to be movable in the axial direction. A plurality of land portions 51, 52, 53 corresponding to the plurality of valve holes 23, 24, 25 of the sleeve 21 are formed in the spool 50 at predetermined intervals in the axial direction.
The spool 50 is urged toward the plunger 14 by a spring 46 so that one end of the spool 50 is always in contact with the plunger 14.

Now, on the outer peripheral surface of the sleeve 21, there are outer peripheral portions corresponding to the openings of the ports such as the output port 30 and the input port 40. In FIG. 1, the outer peripheral surfaces corresponding to the openings of the output port 30 and the input port 40, respectively. In the portion, a strainer mounting portion 60 having a circular or arc shape in cross section is formed.
In the first embodiment, the strainer mounting portion 60 is larger than the width in the axial direction and the length in the circumferential direction of the openings of the output port 30 and the input port 40, and the strainers 70 and 80 described in detail below. It is constituted by strainer mounting grooves 61 and 65 that are circular or arcuate in a cross section that is recessed with a groove width dimension slightly larger than the plate width dimension.
Further, the groove depth dimensions of the strainer mounting grooves 61 and 65 are set to be appropriately larger than the plate thickness dimensions of the strainers 70 and 80.

  The strainers 70 and 80 mounted in the strainer mounting grooves 61 and 65 are for removing dust mixed in the oil, and are made of leaf spring materials such as perforated plates and mesh plates, such as stainless steel plates and copper plates. Are formed in a C-shaped cross section. Of the strainers 70, 80 mounted in the strainer mounting grooves 61, 65, the strainer 70 mounted in the strainer mounting groove 61 corresponding to the output port 30 has a central region 71 as shown in FIGS. The central region 71 has both opening regions 74 that are formed continuously at both ends of the central region 71 and have different cross-sectional radii of curvature.

As shown in FIG. 4, the radius of curvature r of the central region 71 is set smaller than the radius of curvature Ra of the cross section of the strainer mounting groove 61.
Further, the curvature radius R of both the opening regions 74 is set to be larger than the curvature radius r of the central region 71 and equal to or less than the curvature radius Ra of the cross section of the strainer mounting groove 61.
In addition, it is desirable that the curvature radius Ra of the cross section of the strainer mounting groove 61 is set to be substantially equal.
The central region 71 is formed by an arc of about 180 degrees, and both opening regions 74 are formed by an arc range of about 50 degrees from both ends of the arc of the central region 71. Further, the opening width dimension W of both the opening regions 74 is set to be appropriately smaller than the diameter dimension 2Ra of the arc of the strainer mounting groove 61.
Further, in the first embodiment, as shown in FIGS. 3 and 4, a large number of holes (small holes) 72 are provided through the entire region of the central region 71 of the strainer 70 and a part of both the opening regions 74. Has been.

  In addition, the strainer 80 mounted in the strainer mounting groove 65 corresponding to the input port 40 is formed with the same setting conditions as the strainer 70 mounted in the strainer mounting groove 61 corresponding to the output port 30 described above. The description is omitted.

The electromagnetic valve strainer mounting structure according to the first embodiment is configured as described above.
Therefore, when the strainer 70 is mounted on the strainer mounting groove 61 serving as the strainer mounting portion 60, first, as shown in FIG. 5, the distance dimension W between both ends 74 of the strainer 70 is set to the strainer mounting groove. It is expanded and deformed so as to be appropriately larger than the diameter dimension 2Ra of 61. In this state, the strainer 70 is fitted into the strainer mounting groove 61 from the outer peripheral surface of the strainer mounting groove 61.
Thereafter, by releasing the strainer 70, the strainer 70 is mounted on the strainer mounting portion by its own restoring force (see FIG. 2).

As shown in FIG. 2, in a state where the strainer 70 is mounted on the outer peripheral surface of the strainer mounting groove 61 by its own restoring force, the curvature radius R of both the opening regions 74 of the strainer 70 is the curvature radius of the central region 71. It is set to be larger than r and equal to or less than the curvature radius Ra of the cross section of the strainer mounting groove 61. Therefore, both opening regions 74 of the strainer 70 are mounted close to the arc surface of the strainer mounting groove 61.
As a result, when the space dimension Wa between both ends of the opening area 74 of the strainer 70 is expanded and deformed so as to be appropriately larger than the diameter dimension 2Ra of the strainer mounting groove 61, the central area of the strainer 70 is obtained. Even if a plastic region due to plastic deformation occurs in a part of 71, the gap S generated between the strainer 70 and the groove bottom surface of the strainer mounting groove 61 can be kept small.

Accordingly, the strainer 70 can be prevented from protruding outward in the radial direction from the outer peripheral surface 21 a of the sleeve 21. For this reason, when the sleeve 21 of the solenoid valve is inserted into, for example, a built-in portion of a CVT valve body (not shown), the protruding portion in the radial direction of the strainer 70 can be prevented from becoming an obstruction. Work becomes easy.
In addition, since the curvature radius R of both opening regions 74 of the strainer 70 is set to be substantially equal to the curvature radius Ra of the cross section of the strainer mounting groove 61, both opening regions 74 of the strainer 70 are formed in the strainer mounting groove 61. It is mounted in contact with the arcuate surface. Accordingly, the strainer 70 can be further prevented from protruding outward in the radial direction from the outer peripheral surface 21 a of the sleeve 21.

In the first embodiment, the strainer 70 is mounted in the strainer mounting groove 61 having a groove width dimension slightly larger than the plate width dimension (axial dimension) of the strainer 70, so that the strainer 70 moves in the axial direction. Can be regulated. For this reason, it is possible to prevent the strainer 70 from being unintentionally displaced in the axial direction with respect to the strainer mounting groove 61.
Further, by mounting the strainer 70 in the strainer mounting groove 61, it is possible to suppress the strainer 70 from protruding outward in the radial direction with respect to the outer peripheral surface of the sleeve 21 by an amount corresponding to the groove depth of the strainer mounting groove 61. it can.

  Further, in the first embodiment, since the groove depth dimension of the strainer mounting groove 61 is set larger than the plate thickness dimension of the strainer 70, the sleeve 21 of the sleeve 21 is mounted in the state where the strainer 70 is mounted in the strainer mounting groove 61. This is effective for suppressing the strainer 70 from protruding radially outward with respect to the outer peripheral surface.

In addition, this invention is not limited to the said Example 1, In the range which does not deviate from the summary of this invention, it can implement with a various form.
For example, in the first embodiment, the strainer 70 is exemplified by the case where the central region 71 and the two opening regions 74 are configured with two different radii of curvature r and R. The present invention can be implemented even if an intermediate portion having the third radius of curvature is formed in the middle of the opening region 74.
Also, when a strainer mounting part is formed on the outer peripheral surface of the sleeve corresponding to the opening of various ports other than the output port and input port formed on the sleeve of the solenoid valve, and the strainer is mounted on this strainer mounting part The present invention can also be implemented in

21 Sleeve 30 Output port
40 Input port (port)
60 Strainer mounting portion 61, 65 Strainer mounting groove 70, 80 Strainer 71 Central region 74 Both opening regions

Claims (4)

A strainer mounting structure for mounting a strainer on an opening of an input port, an output port or the like formed on a sleeve of a solenoid valve,
On the outer peripheral surface of the sleeve corresponding to the opening of the port, a circular or arcuate strainer mounting portion is formed in a cross section,
The strainer is formed in a C-shaped cross section by a leaf spring material, has a central region, and both opening regions formed continuously at both ends of the central region,
The radius of curvature of the cross section of the central region is set smaller than the radius of curvature of the cross section of the strainer mounting portion,
2. A strainer mounting structure for an electromagnetic valve, wherein the curvature radii of both the opening regions are set to be larger than the curvature radius of the central region and not more than the curvature radius of the cross section of the strainer mounting portion. A strainer mounting structure for a solenoid valve according to claim 1,
The electromagnetic valve strainer mounting structure, wherein the curvature radius of the opening region is set substantially equal to the curvature radius of the cross section of the trainer mounting portion. A solenoid valve strainer mounting structure according to claim 1 or 2,
The strainer mounting portion is constituted by a strainer mounting groove that is circular or arcuate in a cross section that is recessed with a groove width dimension slightly larger than the plate width dimension of the strainer on the outer peripheral surface of the sleeve. Strainer mounting structure for solenoid valve. A strainer mounting structure for a solenoid valve according to claim 3,
A strainer mounting structure for a solenoid valve, characterized in that the groove depth dimension of the strainer mounting groove is set larger than the thickness of the strainer.

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