CN218761721U - Actuator and grounding structure of actuator - Google Patents
Actuator and grounding structure of actuator Download PDFInfo
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- CN218761721U CN218761721U CN202221691258.7U CN202221691258U CN218761721U CN 218761721 U CN218761721 U CN 218761721U CN 202221691258 U CN202221691258 U CN 202221691258U CN 218761721 U CN218761721 U CN 218761721U
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- actuator
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- grounding
- contact portion
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Abstract
According to the present invention, there is provided an actuator and a grounding structure of the actuator, which can be connected to ground with a simple structure. One aspect of an actuator includes: a main body portion that houses a coil in a case; and a drive shaft having one end inserted into the coil and the other end protruding from the body portion and driven by a magnetic force of the coil, wherein the housing has a metal ground contact portion on an outer surface facing the one end and contacting the other end of the ground member.
Description
Technical Field
The utility model relates to an actuator and grounding structure of actuator.
Background
Conventionally, as one type of coil-incorporated actuator, a solenoid actuator is known in which a movable iron core (plunger) is moved by a solenoid coil to output a driving force. The solenoid actuator is applied to, for example, a solenoid valve or the like which is integrated with a valve and opens and closes the valve by a plunger. The solenoid valve is used for controlling a line pressure for shift control in an automatic transmission and a clutch pressure at the time of shift.
When an actuator having a built-in coil is used, the actuator is grounded (vehicle body grounded). For example, patent document 1 proposes the following technique: in the solenoid valve, when the ground terminal is pressed into the guide, the contact area with the guide is reduced, the polygonal or triangular rice ball shape is deformed into a circular shape, and the pressing is performed, thereby reducing and stabilizing the pressing load and suppressing the deformation of the ground terminal.
Documents of the prior art
Patent literature
Patent document 1: japanese patent laid-open publication No. 2013-190028
SUMMERY OF THE UTILITY MODEL
Problem to be solved by utility model
However, in the technique of patent document 1, a special-shaped ground terminal is required, which leads to a complicated and large-sized structure.
Therefore, the object of the present invention is to obtain a ground connection with a simple structure.
The present invention according to claim 1 provides an actuator comprising:
a main body portion that houses a coil in a case; and
a driving shaft having one end inserted into the coil and the other end protruding from the body and driven by the magnetic force of the coil,
the housing has a metal ground contact portion on an outer surface facing the one end side, the metal ground contact portion being in contact with the other end side of the ground member.
Solution 2 the actuator according to solution 1, characterized in that,
the coil is a solenoid coil.
Case 3 the actuator according to case 1, wherein,
the coil connector further includes a connector portion having a terminal connected to one end of the coil winding and protruding outside the housing.
Scheme 4 the actuator according to scheme 1, wherein,
the ground contact portion is recessed from the other end side toward the one end side, and at least a part of the other end side of the ground member is accommodated in the recess.
Solution 5 the actuator according to solution 4, characterized in that,
the width of the recess of the ground contact portion in a direction orthogonal to the recess direction is narrower on the one end side than on the other end side.
Case 6 the actuator according to case 5, wherein,
the ground contact portion is fitted into the one end side of the ground member on the one end side of the recess.
Solution 7 the actuator according to solution 1, characterized in that,
the housing is formed by press working at least at a portion having the ground contact portion.
Claim 8 is a grounding structure of an actuator, comprising:
the actuator of any of schemes 1 to 7;
the above-mentioned grounding member; and
and a contacted portion which is grounded and is contacted with the one end side of the grounding member.
Solution 9 the grounding structure of an actuator according to solution 8, wherein,
the grounding member is a coil spring.
According to the utility model discloses, can obtain ground connection with simple structure.
Drawings
Fig. 1 is a diagram showing a part of an automatic transmission in which an embodiment of an actuator of the present invention is assembled.
Fig. 2 is a diagram showing the electromagnetic valve fixed to the transmission cover.
Fig. 3 is a perspective view showing an output side of the solenoid valve.
Fig. 4 is a perspective view showing the ground side of the solenoid valve.
Fig. 5 is a sectional view of the solenoid valve.
Fig. 6 is a diagram showing a grounding structure in which the solenoid valve is grounded to the transmission cover.
Fig. 7 is a sectional view of a cover of the solenoid valve.
Fig. 8 is a diagram showing an electrical connection structure in a resin portion of the solenoid valve.
In the figure:
100-solenoid valve, 110-body, 111-cover, 112-solenoid coil, 113-yoke, 114-pressing spring, 115-ground contact, 115 a-bottom, 115 b-opening, 120-output, 121-cylinder, 122-valve, 123-inflow, 124-outflow, 130-connector, 131-square, 132-terminal, 140-plunger, 200-hydraulic control device, 300-transmission cover, 330-ground spring, 340-contacted part.
Detailed Description
Hereinafter, embodiments of the actuator and the grounding structure of the actuator according to the present disclosure will be described in detail with reference to the drawings. However, unnecessary detailed description may be omitted in order to avoid unnecessary redundancy in the following description and to make it readily understandable by those skilled in the art. For example, detailed descriptions of already known matters and repeated descriptions of substantially the same configuration may be omitted. In addition, elements described in the above-described drawings may be appropriately referred to in the following description of the drawings.
Fig. 1 is a diagram showing a part of an automatic transmission in which an embodiment of an actuator of the present invention is assembled.
Fig. 1 shows a transmission cover 300, a hydraulic control device 200, and an electromagnetic valve 100. However, only a part of the transmission cover 300 and the hydraulic control device 200 is shown. The number of the solenoid valves 100 shown in fig. 1 is an example, and the number of the solenoid valves 100 may be plural.
The transmission cover 300 is a part of a case of the automatic transmission, and is detachably attached to a cover attachment portion (not shown) of the case.
The hydraulic control device 200 has a plurality of oil passages therein, and changes the flow of oil by opening and closing each oil passage, thereby switching a transmission gear (not shown).
The solenoid valve 100 corresponds to an embodiment of the actuator of the present invention, and is attached to the hydraulic control device 200 to open and close an oil passage. The solenoid valve 100 is detachable from the hydraulic control device 200 and is fixed to the transmission cover 300.
Fig. 2 is a diagram showing the electromagnetic valve 100 fixed to the transmission cover 300.
The solenoid valve 100 is held by a holding plate 310, and the holding plate 310 is fixed to the transmission cover 300 by bolts 320, whereby the solenoid valve 100 is also fixed to the transmission cover 300.
The solenoid valve 100 is driven by supplying an electric current from the transmission cover 300 side through an unillustrated power cord. The electromagnetic valve 100 is grounded on the transmission cover 300 side.
Fig. 3 to 5 are diagrams showing the structure of the solenoid valve 100. Fig. 3 is a perspective view showing an output side of the solenoid valve 100, fig. 4 is a perspective view showing a ground side of the solenoid valve 100, and fig. 5 is a sectional view of the solenoid valve 100.
The solenoid valve 100 includes a main body 110, an output unit 120, and a connector unit 130 in appearance, and includes a plunger 140 therein.
The main body 110 receives power supply to drive the plunger 140.
The output unit 120 is inserted into the hydraulic control device 200, and opens and closes the oil passage by the movement of the plunger 140.
A cord (not shown) for supplying electric power to the main body 110 is connected to the connector unit 130.
One end of the plunger 140 is inserted into the body 110, and the other end extends into the output unit 120 and moves toward the one end and the other end. In the following description, the left side of fig. 5 is sometimes referred to as "one axial end side" and the right side of fig. 5 is sometimes referred to as "the other axial end side" with the plunger 140 as a reference of the direction.
The body portion 110 has a cover 111, a solenoid coil 112, a yoke 113, and a biasing spring 114.
A case in which the metal cover 111 and the yoke 113 made of a magnetic material are combined corresponds to an example of the case of the present invention, and the solenoid coil 112 in which a coil is wound around the bobbin 116 is housed inside the case. In other words, in the body portion 110, the solenoid coil 112 is housed in a case constituted by the cover 111 and the yoke 113.
The yoke 113 guides the magnetic field generated by the solenoid coil 112 to the plunger 140, and the plunger 140 is attracted toward one axial end side by the magnetic field. When the magnetic field of the solenoid coil 112 is cut off, the pressing spring 114 presses the plunger 140 back toward the other end in the axial direction. In other words, one end in the axial direction is inserted into the solenoid coil 112, and the other end in the axial direction protrudes from the body 110 and is driven by the magnetic force of the solenoid coil 112.
The solenoid coil 112 corresponds to an example of the coil of the present invention, and the plunger 140 corresponds to an example of the drive shaft of the present invention. By using the solenoid coil 112 as the coil in the present invention, a linear driving type and small actuator can be realized.
The output section 120 includes a cylindrical portion 121 and a valve portion 122.
The cylindrical portion 121 is made of resin and has a cylindrical structure extending toward the other end side in the axial direction with respect to the main body portion 110. The cylinder 121 has an inflow passage 123 and an outflow passage 124 therein.
The valve portion 122 is provided between the inlet passage 123 and the outlet passage 124 of the cylindrical portion 121, and when the distal end of the plunger 140 presses the spherical body 122a in the valve portion 122, the valve portion 122 closes to block the gap between the inlet passage 123 and the outlet passage 124. When the tip of the plunger 140 moves away from the ball 122a in the valve portion 122, the valve portion 122 opens, the inlet passage 123 communicates with the outlet passage 124, and oil flows.
The square tube 131 is made of resin, and has an opening at one axial end, and the terminal 132 protrudes from the bottom of the square tube 131 to one axial end. Terminal 132 is connected to one end of the winding of solenoid coil 112. That is, the connector portion 130 has a terminal 132 connected to one end of the winding of the solenoid coil 112, and protrudes outside the housing. The solenoid coil 120 can be easily supplied with power via the connector portion 130 protruding to the outside of the housing.
The solenoid valve 100 is grounded on the transmission cover 300 side as described above. Specifically, the outer surface of the cover 111 on one axial side is provided with a ground contact portion 115, and the other axial end side of the grounding spring 330 is inserted into the ground contact portion 115. The grounding spring 330 corresponds to an example of the grounding member of the present invention. That is, the cover 111, which is a part of the housing, has a metal ground contact portion 115 that comes into contact with the other end side in the axial direction of the grounding spring 330 on the outer surface facing the one end side in the axial direction. As a result, the ground connection can be obtained with a simple structure in which the cover 111 is in contact with the other end side in the axial direction of the grounding spring 330.
In the present embodiment, the "outer surface facing one end side in the axial direction" refers to the entire bottom surface 111b of the cover 111 except for the cylindrical side surface 111a of the cover 111.
The ground contact portion 115 corresponds to an example of the ground contact portion according to the present invention, and in the present embodiment, it is configured to be recessed from the other axial end side toward the one axial end side, and at least a part of the other axial end side of the grounding spring 330 is housed in the recessed portion. The ground contact portion in the present invention is not limited to the recessed structure, and may be, for example, a convex portion extending toward the other end side in the axial direction. However, if the grounding contact 115 has a recessed structure as in the present embodiment, the grounding spring 330 is accommodated in the recess of the grounding contact 115, and therefore the position of the grounding spring 330 is stable, which is preferable.
Fig. 6 is a diagram showing a grounding structure in which the solenoid valve 100 is grounded to the transmission cover 300.
The transmission cover 300 has a contacted portion 340 at a position facing the solenoid valve 100. The contacted portion 340 is grounded and is in contact with one end side in the axial direction of the grounding spring 330.
The solenoid valve 100 and the contacted portion 340 can be grounded by a simple grounding structure in which the grounding spring 330 is sandwiched therebetween. The grounding member of the present invention may be a disk spring or a non-elastic member. However, if a coil spring is used as the grounding spring 330 in the present embodiment, the grounding structure can be easily assembled.
Fig. 7 is a sectional view of the cover 111 of the solenoid valve 100.
The ground contact 115 of the cover 111 has a concave structure, and has a bottom 115a and an opening 115b. In the present embodiment, the cover 111 is formed by press working. The housing of the present invention is preferably formed by press working at least at a portion having a ground contact portion. The manufacturing cost can be suppressed by press working.
The diameter of the ground contact 115 on the opening 115b side is larger than the diameter on the bottom 115a side. In other words, the width of the recess of the ground contact portion 115 in the direction orthogonal to the recess direction is narrower on one axial end side (bottom 115a side) than on the other axial end side (opening 115b side). If the opening side is wide, the grounding spring 330 can be easily inserted during assembly, and if the depth is narrow, the position of the grounding spring 330 is stable.
The diameter of the ground contact portion 115 on the bottom 115a side is smaller than the diameter of the grounding spring 330. Therefore, one axial end side of the grounding spring 330 is fitted into one axial end side (bottom 115a side) of the recess of the grounding contact portion 115. The grounding spring 330 is fitted into the recess of the grounding contact portion 115, whereby the grounding spring 330 is fixed to the grounding contact portion 115, and the position of the grounding spring 330 is further stabilized.
Fig. 8 is a diagram showing an electrical connection structure in the resin portion of the solenoid valve 100.
In the present embodiment, a resin member is integrated from the square tube 131 of the connector portion 130 to the tube portion 121 of the output portion 120, and a metal member such as the terminal 132 is embedded in the resin member.
The terminal 132 in the metal member is electrically connected to one end of the wire of the solenoid coil 112.
The yoke connecting portion 135 is a metal member separated from the terminal 132, and the other end of the winding of the solenoid coil 112 is electrically connected to the yoke connecting portion 135. The yoke connecting portion 135 is fixed to the yoke 113 by welding or the like and electrically connected to the yoke 113, and the yoke 113 is electrically connected to the cover 111. As a result, the other end of the winding of the solenoid coil 112 is electrically connected to the grounding spring 330.
In the above description, the automatic transmission, the solenoid valve, and the solenoid actuator of the automobile have been described as examples of the actuator and the method of using the grounding structure of the actuator according to the present invention, but the actuator and the method of using the grounding structure of the actuator according to the present invention are not limited to the above description, and can be widely applied to various electric products having a body ground such as a motor as a rotation-driven actuator, an electric oil pump having a motor, and a reduction gear.
The above-described embodiments are examples in all respects and should not be considered as limiting. The scope of the present invention is defined by the claims, not by the embodiments described above, and is intended to include meanings equivalent to the claims and all modifications within the scope.
Claims (9)
1. An actuator, comprising:
a main body portion that houses a coil in a case; and
a driving shaft having one end inserted into the coil and the other end protruding from the body and driven by a magnetic force of the coil,
the housing has a metal ground contact portion on an outer surface facing the one end side, the metal ground contact portion being in contact with the other end side of the ground member.
2. The actuator of claim 1,
the coil is a solenoid coil.
3. The actuator of claim 1,
the coil winding device further includes a connector portion having a terminal connected to one end of the coil winding and protruding outside the housing.
4. The actuator of claim 1,
the grounding contact portion is recessed from the one end side direction toward the other end side direction, and at least a part of the grounding member in the other end side direction is housed in the recess.
5. The actuator of claim 4,
the width of the recess of the ground contact portion in a direction orthogonal to the recess direction is narrower in the one end side direction than in the other end side direction.
6. The actuator of claim 5,
the ground contact portion is fitted in the direction of the one end side of the recess.
7. The actuator of claim 1,
the housing is formed by press working at least at a portion having the ground contact portion.
8. A grounding structure of an actuator, comprising:
the actuator of any one of claims 1 to 7;
the above-mentioned grounding member; and
and a contact receiving portion which is grounded and contacts the one end side of the grounding member.
9. The grounding structure of actuator of claim 8, wherein said grounding member is a coil spring.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021-108646 | 2021-06-30 | ||
| JP2021108646A JP2023006182A (en) | 2021-06-30 | 2021-06-30 | Actuator and ground structure of the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218761721U true CN218761721U (en) | 2023-03-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221691258.7U Active CN218761721U (en) | 2021-06-30 | 2022-06-29 | Actuator and grounding structure of actuator |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2023006182A (en) |
| CN (1) | CN218761721U (en) |
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2021
- 2021-06-30 JP JP2021108646A patent/JP2023006182A/en active Pending
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2022
- 2022-06-29 CN CN202221691258.7U patent/CN218761721U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2023006182A (en) | 2023-01-18 |
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