CN213934641U - Pressure control device - Google Patents
Pressure control device Download PDFInfo
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- CN213934641U CN213934641U CN202022623740.4U CN202022623740U CN213934641U CN 213934641 U CN213934641 U CN 213934641U CN 202022623740 U CN202022623740 U CN 202022623740U CN 213934641 U CN213934641 U CN 213934641U
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- Prior art keywords
- flow path
- control device
- pressure control
- axis
- small hole
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- 239000012530 fluid Substances 0.000 claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000003405 preventing effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model provides a pressure control device can prevent to come from fluidic excessive power to act on detecting element. The pressure control device includes: a first body having a first flow path; a second body having a second flow path provided so as to penetrate in a second axial direction orthogonal to the first axis when the central axis of the first flow path is set as the first axis; a plate member disposed between the first body and the second body, and having a small hole penetrating in the second axis direction to connect the first flow path and the second flow path and having a smaller diameter than the second flow path; and a pressure sensor unit fixed to the second body, the pressure sensor unit including a detection element and a cylindrical body, the cylindrical body being provided along the second flow path and having an introduction path for introducing the fluid flowing through the second flow path into the detection element, and a center of the small hole being located away from a center of the introduction path when viewed in the second axial direction.
Description
Technical Field
The utility model relates to a pressure control device.
Background
A hydraulic control device (control valve) is mounted in an automobile and hydraulically controls oil serving as a working fluid for operating a transmission (transmission). The oil pressure control device includes: a lower body having a first oil path through which oil flows; an upper body having a second oil passage connected to the first oil passage; and a pressure sensor provided in the upper body and detecting the oil pressure (see, for example, patent document 1).
[ Prior art documents ]
[ patent document ]
[ patent document 1] Japanese patent laid-open No. 2018-31620
SUMMERY OF THE UTILITY MODEL
[ problem to be solved by the utility model ]
In the oil pressure control device described in patent document 1, the second oil passage faces the pressure sensor through the oil introduction space, that is, the pressure sensor is disposed on an extension line of the second oil passage. In this case, depending on the degree of flow of the oil flowing through the second oil passage toward the pressure sensor, excessive force from the oil may act on the pressure sensor, and the pressure sensor may be damaged by damage or the like. In addition, a damaged pressure sensor may have difficulty in accurate pressure detection.
An object of the present invention is to provide a pressure control device that can prevent excessive force from a fluid from acting on a detection element.
[ means for solving problems ]
The utility model discloses a pressure control device's first embodiment includes:
a first body having a plate shape and a first flow path, the first flow path being formed of a groove provided on one surface in a thickness direction and allowing a fluid to flow therethrough;
a second body which is disposed on the one surface side of the first body, has a plate shape, and has a second flow path which is formed of a through hole provided so as to penetrate in a second axis direction orthogonal to the first axis when a central axis of the first flow path is set as the first axis, and through which the fluid can flow;
a plate member disposed between the first body and the second body, having a plate shape thinner than the first body and the second body, and having a small hole penetrating in the second axis direction to connect the first flow path and the second flow path and having a smaller diameter than the second flow path; and
a pressure sensor unit fixed to the second body, the pressure sensor unit including a detection element that detects a pressure of the fluid, and a cylindrical body that is provided along the second flow path and has an introduction path that introduces the fluid flowing through the second flow path into the detection element,
the center of the pinhole is located away from the center of the introduction path when viewed from the second axial direction.
A second embodiment of the pressure control device according to the present invention is the pressure control device according to the first embodiment, wherein at least a part of the small hole overlaps with the cylindrical wall of the cylindrical body when viewed from the second axial direction.
A third embodiment of the pressure control device according to the present invention is the pressure control device according to the first or second embodiment, wherein the center of the small hole overlaps with the cylindrical wall of the cylindrical body when viewed from the second axial direction.
A fourth embodiment of the pressure control device according to the present invention is the pressure control device according to the first or second embodiment, wherein a part of the small hole overlaps with the introduction path when viewed from the second axial direction.
A fifth embodiment of the pressure control device according to the present invention is the pressure control device according to the first or second embodiment, wherein the small hole has a smaller diameter than the introduction path.
A sixth embodiment of the pressure control device of the present invention is the pressure control device according to the first or second embodiment, wherein the center axis of the small hole is parallel to the second axis.
A seventh embodiment of the pressure control device according to the present invention is the pressure control device according to the first or second embodiment, wherein the small hole is provided in a plurality at intervals around a center of the introduction path.
[ effects of the utility model ]
According to an embodiment of the pressure control device of the present invention, excessive force from the fluid is prevented from acting on the detection element.
Drawings
Fig. 1 is a vertical sectional view showing a first embodiment of a pressure control device according to the present invention.
Fig. 2 is a view (bottom view) seen from the arrow a direction in fig. 1.
Fig. 3 is a bottom view showing a second embodiment of the pressure control device according to the present invention.
Fig. 4 is a bottom view showing a third embodiment of the pressure control device according to the present invention.
Fig. 5 is a bottom view showing a fourth embodiment of the pressure control device according to the present invention.
Fig. 6 is a bottom view showing a fifth embodiment of the pressure control device according to the present invention.
[ description of symbols ]
1: pressure control device
2: first body
21: upper surface of
23: first flow path
3: second body
31: upper surface of
32: lower surface
33: second flow path
331: internal thread
4: plate member
41: upper surface of
42: lower surface
43: small hole
5: pressure sensor unit
51: detection element
52: cylindrical body
521: leading-in path
522: cylinder wall
523: external thread
524: flange part
53: cover
10: body
11: gasket ring
O23: center shaft
O43: central shaft (center)
O521: central shaft (center)
Q: fluid, especially for a motor vehicle
t 522: thickness of
W23: width of
Detailed Description
Hereinafter, the pressure control device of the present invention will be described in detail based on preferred embodiments shown in the drawings.
< first embodiment >
A first embodiment of the pressure control device of the present invention will be described with reference to fig. 1 and 2.
For convenience of explanation, the X axis, the Y axis, and the Z axis are set for three axes orthogonal to each other. For example, an XY plane including an X axis and a Y axis is horizontal, and a Z axis is vertical. In the present specification, the vertical direction, the horizontal direction, the upper side, and the lower side are names for simply explaining the relative positional relationship of the respective parts, and the actual positional relationship may be other than the positional relationship shown by these names.
As shown in fig. 1, the pressure control apparatus 1 includes: a body 10 through which a fluid Q flows; and a pressure sensor unit 5 provided to the body 10. The pressure control device 1 is mounted on a vehicle such as an automobile, for example, and is used as a hydraulic control device for performing hydraulic control. The fluid Q is not particularly limited, and may be transmission oil, for example, when the pressure control device 1 is used as an automotive hydraulic control device.
The main body 10 includes a first main body 2, a second main body 3, and a plate member 4, and is an assembly in which the first main body 2, the plate member 4, and the second main body 3 are sequentially stacked and assembled from the lower side.
The first body 2, the second body 3, and the plate member 4 are each plate-shaped, and in the present embodiment, the thickness direction is parallel to the Z-axis direction.
The first body 2 and the second body 3 are cast products made of a metal material such as aluminum, for example. The Plate member 4 is a Steel Plate such as a Cold rolled Steel Plate (SPCC) that is thinner than the first body 2 and the second body 3.
The first body 2 is a bottom body disposed at the lowermost side of the body 10.
The first body 2 has a first flow path 23. The first flow path 23 is formed by a groove provided on one surface (upper surface 21) in the thickness direction of the first body 2. The fluid Q may flow through the first flow path 23.
In fig. 1, the first flow path 23 is formed along the Y axis direction as an example, but is not limited thereto, and may be formed along any direction of the XY plane direction.
In the present embodiment, when the central axis O23 of the first flow path 23 is a first axis and a second axis direction orthogonal to the first axis is used, the first axis direction is parallel to the Y axis direction and the second axis direction is parallel to the Z axis direction.
The second body 3 is an upper body disposed at the uppermost side of the body 10.
The second body 3 has a second flow path33. The second flow path 33 is formed by a through hole penetrating the second body 3 in the thickness direction, that is, from the lower surface 32 of the second body 3 to the upper surface 31 in the Z-axis direction. In addition, the fluid Q may flow through the second flow path 33. The second flow path 33 is circular in plan view of the main body 10 (second main body 3), and has a diameter in the present embodiment
The width W23 of the first flow path 23 is the same, but the width W23 is not limited thereto and may be different.
The plate member 4 is a partition plate disposed between the first body 2 and the second body 3.
The plate member 4 has a small hole 43 having a smaller diameter than the second flow path 33. The small hole 43 is a through hole that penetrates the plate member 4 in the thickness direction, that is, in the Z-axis direction from the lower surface 42 of the plate member 4 to the upper surface 41. Thereby, the first channel 23 and the second channel 33 are connected via the orifice 43. In addition, the fluid Q can flow from the first channel 23 into the second channel 33 through the orifice 43. Also, the fluid Q is throttled while passing through the orifice 43. Thus, the small hole 43 also functions as an orifice (orifice). The small hole 43 is circular in plan view of the main body 10 (plate member 4), and preferably has a diameter in the present embodiment
Is the diameter of the second flow path 33
5% or more and 50% or less, more preferably 10% or more and 20% or less.
The small hole 43 is not limited to a circular shape in a plan view.
Further, since the small hole 43 penetrates the plate member 4 in the thickness direction, the center axis (center) O43 of the small hole 43 is parallel to the Z-axis direction. Thus, when the small hole 43 is processed in the plate member 4, the drill (drill bit) is used, so that the processing becomes easy.
The pressure sensor unit 5 is disposed on the second body 3. The pressure sensor unit 5 includes a detection element 51, a cylindrical body 52, and a cover 53.
The cylindrical body 52 has a cylindrical shape and has (includes) an introduction passage 521 for introducing the fluid Q inside.
A male screw 523 is provided on the outer peripheral portion of the cylindrical body 52. On the other hand, a female screw 331 is provided on the upper side of the inner peripheral portion of the second flow path 33 of the second body 3. In addition, the external thread 523 of the cylindrical body 52 may be screwed to the internal thread 331 of the second body 3. Thereby, the cylindrical body 52 is provided along the second flow path 33 and is fixed to the second main body 3.
Further, a flange portion 524 having an outer diameter enlarged upward of the male screw 523 is provided on the outer peripheral portion of the cylindrical body 52. When the cylindrical body 52 is screwed into the second body 3, the flange portion 524 abuts on the upper surface 31 of the second body 3. Thereby, the screwing limit of the cylindrical body 52 is restricted, and therefore the cylindrical body 52 can be appropriately screwed to the second body 3.
An annular gasket 11 is disposed between the flange 524 and the second body 3 concentrically with the second flow path 33. This prevents the fluid Q from leaking between the flange 524 and the second body 3. The washer 11 preferably has elasticity and is compressed between the flange portion 524 and the second body 3. This improves the liquid-tightness between the flange 524 and the second body 3, and contributes to preventing the leakage of the fluid Q.
A cover 53 is attached and fixed to the upper side of the cylindrical body 52. The detection element 51 is supported on the lower side of the cover 53. Thus, the detection element 51 faces the introduction path 521 and is positioned on the central axis (center) O521 of the introduction path 521. The fluid Q flowing through the second channel 33 can be introduced into the detection element 51 through the introduction channel 521, and presses the detection element 51.
The detection element 51 detects the pressure of the fluid Q. The detection element 51 has, for example, a strain gauge, and is configured such that the resistance value of the strain gauge changes due to a force acting from the fluid Q. Further, the resistance value of the detection element 51 is converted into the pressure value of the fluid Q by a circuit board (not shown) built in the cover 53.
As described above, the plate member 4 has the small hole 43. As shown in FIG. 2, the center axis O43 of the pinhole 43 is located away from the center axis O43 when viewed from the Z-axis direction negative sideThe position of the central axis O521 of the open introduction path 521 is particularly preferably overlapped with the cylindrical wall 522 of the cylindrical body 52. Further, the diameter of the pinhole 43 is measured when viewed from the negative side in the Z-axis direction
Less than the thickness t522 of the wall 522, the entire aperture 43 overlaps the wall 522 of the cartridge 52.
When the fluid Q flows from the first channel 23 into the second channel 33 through the small hole 43, the small hole 43 collides with the tubular wall 522 of the tubular body 52. This makes it possible to change the direction of the fluid Q or reduce the flow force of the fluid Q, and thus it is possible to prevent an excessive force from the fluid Q from acting on the detection element 51 (hereinafter referred to as "excessive pressure prevention effect").
A vehicle equipped with the pressure control device 1 may be damaged by, for example, a breakage of the detection element 51, because oil vibration occurs in the first flow path 23 or the second flow path 33 due to vibration during traveling, or the like, and a sudden pressure from the fluid Q, i.e., a thrust force, acts on the detection element 51. However, by the excessive pressing force preventing effect, pressing of the detection element 51 can be prevented. This prevents the detection element 51 from being damaged, and therefore, the detection element 51 can be used to perform accurate pressure detection.
The small hole 43 has a smaller diameter than the introduction path 521, that is, the diameter of the small hole 43
Is smaller than the diameter of the introduction path 521
Thereby, the fluid Q is throttled in addition to the orifice 43 when flowing through the introduction passage 521. The throttle in the introduction passage 521 contributes to an increase in the excessive pressure prevention effect in addition to the small hole 43.
< second embodiment >
A second embodiment of the pressure control device of the present invention will be described with reference to fig. 3, but differences from the above-described embodiments will be mainly described, and descriptions of the same matters will be omitted.
This embodiment is the same as the first embodiment except that the positional relationship between the small hole 43 and the introduction path 521 is different.
As shown in fig. 3, in the present embodiment, a part of the pinhole 43 overlaps the introduction path 521 when viewed from the negative side in the Z-axis direction. This can exhibit an excessive pressure prevention effect, and the fluid Q flowing into the second channel 33 through the orifice 43 can smoothly flow into the inlet channel 521.
< third embodiment >
A third embodiment of the pressure control device of the present invention will be described with reference to fig. 4, but differences from the above-described embodiments will be mainly described, and descriptions of the same matters will be omitted.
This embodiment is the same as the first embodiment except that the number of the small holes 43 is different.
As shown in fig. 4, in the present embodiment, two small holes 43 are arranged with a space (particularly preferably, an equal space) around the center O521 of the introduction passage 521. Thus, the fluid Q from the first channel 23 can be quickly flowed to the second channel 33 by the number of the small holes 43 more than that in the first embodiment.
Further, the diameter of each small hole 43
The present embodiment is the same as the above embodiment, but the present invention is not limited thereto and may be different.
The shape of each small hole 43 is the same in the present embodiment, but the shape is not limited to this and may be different.
< fourth embodiment >
A fourth embodiment of the pressure control device of the present invention will be described with reference to fig. 5, but differences from the above-described embodiments will be mainly described, and descriptions of the same matters will be omitted.
This embodiment is the same as the third embodiment except that the number of the small holes 43 is different.
As shown in fig. 5, in the present embodiment, three small holes 43 are arranged at intervals around the center O521 of the introduction passage 521. Thus, the fluid Q from the first channel 23 can be quickly flowed to the second channel 33 by the number of the small holes 43 more than that in the third embodiment.
< fifth embodiment >
A fifth embodiment of the pressure control device of the present invention will be described with reference to fig. 6, but differences from the above-described embodiments will be mainly described, and descriptions of the same matters will be omitted.
This embodiment is the same as the fourth embodiment except that the number of the small holes 43 is different.
As shown in fig. 5, in the present embodiment, four small holes 43 are arranged at intervals around the center O521 of the introduction passage 521. Thus, the fluid Q from the first channel 23 can be quickly caused to flow to the second channel 33 by the number of the small holes 43 being larger than that in the fourth embodiment.
The pressure control device of the present invention has been described above with reference to the illustrated embodiments, but the present invention is not limited thereto, and each part constituting the pressure control device may be replaced with any structure that can exhibit the same function. Further, any structure may be added.
In addition, the pressure control device of the present invention may be configured by combining two or more arbitrary structures (features) of the above-described embodiments.
The number of the small holes 43 is one in the first and second embodiments, two in the third embodiment, three in the fourth embodiment, and four in the fifth embodiment, but the number is not limited thereto, and may be five or more.
Claims (7)
1. A pressure control device, comprising:
a first body having a plate shape and a first flow path that is formed by a groove provided on one surface in a thickness direction and through which a fluid can flow;
a second body which is disposed on one side of the one surface of the first body, has a plate shape, and has a second flow path which is formed of a through hole provided so as to penetrate in a second axis direction orthogonal to the first axis when a central axis of the first flow path is set as the first axis, and through which the fluid can flow;
a plate member disposed between the first body and the second body, having a plate shape thinner than the first body and the second body, and having a small hole penetrating in the second axis direction to connect the first flow path and the second flow path and having a smaller diameter than the second flow path; and
a pressure sensor unit fixed to the second body, the pressure sensor unit including a detection element that detects a pressure of the fluid, and a cylindrical body that is provided along the second flow path and includes an introduction path that introduces the fluid flowing through the second flow path into the detection element,
the center of the pinhole is located away from the center of the introduction path when viewed from the second axial direction.
2. Pressure control device according to claim 1,
at least a portion of the small hole overlaps with the wall of the cylindrical body when viewed from the second axial direction.
3. Pressure control device according to claim 1 or 2,
when viewed from the second axis direction, the center of the small hole is overlapped with the cylinder wall of the cylinder body.
4. Pressure control device according to claim 1 or 2,
when viewed from the second axial direction, a part of the small hole overlaps the introduction path.
5. Pressure control device according to claim 1 or 2,
the small hole is smaller than the introduction path.
6. Pressure control device according to claim 1 or 2,
the central axis of the aperture is parallel to the second axis.
7. Pressure control device according to claim 1 or 2,
the plurality of small holes are arranged at intervals around the center of the introduction path.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019209340A JP2021081313A (en) | 2019-11-20 | 2019-11-20 | Pressure controller |
| JP2019-209340 | 2019-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213934641U true CN213934641U (en) | 2021-08-10 |
Family
ID=75964768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022623740.4U Active CN213934641U (en) | 2019-11-20 | 2020-11-13 | Pressure control device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2021081313A (en) |
| CN (1) | CN213934641U (en) |
-
2019
- 2019-11-20 JP JP2019209340A patent/JP2021081313A/en active Pending
-
2020
- 2020-11-13 CN CN202022623740.4U patent/CN213934641U/en active Active
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| Publication number | Publication date |
|---|---|
| JP2021081313A (en) | 2021-05-27 |
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