JPH0416394Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The invention is applicable to applications in which, for example, electrical equipment installed inside a hydraulic system and a device outside the hydraulic system that controls the electrical equipment are connected. The present invention relates to an electrical connection device that can be used, and particularly relates to an electrical connection device that has a sealing function and is used in applications where a covered wire is immersed in oil or the like or where a covered electrode leaks water.

(Prior Art) For example, in devices that perform control using hydraulic pressure, there are many examples in which electrical equipment, such as a solenoid, is immersed in a working fluid. For example, in a hydraulic control system for an automatic transmission of a car, a solenoid valve for pressure regulation is immersed in the working fluid inside the transmission housing, and is controlled by a signal from an electronic control unit located outside the transmission housing. controlled.

The electronic control device and the solenoid valve are electrically connected by covered wires, but in this case, there is a risk of oil leaking from inside the housing to the outside, or moisture leaking from outside the housing to the inside. It becomes a problem. Leakage in this case is not only leakage from between the housing and the covered wire, but also leakage that passes through gaps between the many core wires of the coated wire and between the core wire and the sheathing due to capillary action.

Regarding this type of seal technology, for example,
Those shown in Japanese Patent Application Laid-open No. 57-73256 and Japanese Patent Application Laid-Open No. 58-39216 are known. In these technologies, in order to prevent leakage through the inside of the covered wire, two separated covered wires are connected by crimping inside a seal case, and the connected portion is filled with epoxy resin. It is disclosed that leakage from one covered wire is prevented from being transmitted to the other.

In this type of conventional device, as shown in FIG. 3, a seal device 20 through which a covered electric wire 25 is passed is attached to the hydraulic device housing 11, and a connector 30 is connected to the covered electric wire 25 pulled out from the seal device 20. It is configured to be connectable to a connector 40 connected to an electronic control device.

Japanese Utility Model Publication No. 47-114 discloses a waterproof connector, and Japanese Unexamined Patent Publication No. 52-393 discloses a waterproof plug.

(Problem to be solved by the invention) The above-mentioned JP-A-57-73256 and JP-A-58-
In conventional devices such as those disclosed in Publication No. 39216, the number of components of the device for connection and sealing is large, and the process for manufacturing them is complicated.
It also involves time-consuming steps (such as drying the epoxy resin) and is expensive.

The above-mentioned Utility Model Publication No. 47-114 and JP-A-52-393
The waterproof connectors disclosed in the publication have a relatively simple structure, but when manufacturing them, a separate technology is required to position the electrodes in the desired position using tools other than the elements to be manufactured during the resin molding process. There are separate issues such as whether to do so, and since the waterproof structure is simple, it is presumed that problems with waterproofing are likely to occur.

This invention allows for accurate electrode positioning,
It is an object of the present invention to provide an electrical connection device having a relatively simple structure and a high sealing function.

[Structure of the invention] (Means for solving the problem) The electrical connection device of the invention includes a trunk 7b, a flange 7a continuous at one end thereof, and a plurality of electrodes passing through the flange 7a in the direction in which the trunk 7b extends. An insulating positioning member 7 having a through hole 7c; a plurality of electrodes 4 to 6 each passing through each of the electrode through holes 7c; a plurality of wire through holes 2a extending in a direction perpendicular to the upper surface; an insulating elastic support member 2 having a ring protrusion 2c formed on the wall surface and a ring groove 2b formed on the side circumferential surface, and at least a part of the upper surface abutting the lower end surface of the main body 7b; the electric wire; The flange 7 passes through the through hole in a liquid-tight manner.
a plurality of covered wires 3 connected to each of the plurality of electrodes 4 to 6 at a position below the main body 7b and facing the side surface of the main body 7b; and a lower half of the electrodes 4 to 6, and the positioning member 7. An insulating covering member 1 that is in fluid-tight contact with the connecting portion of the covered wire 3 to the electrodes 4 to 6 and the upper surface and side circumferential surface of the elastic support member 2 to integrally support them; .

Note that symbols inside brackets indicate corresponding elements in the embodiments shown in the drawings and described later.

(Function) For example, the covering member 1 is molded with resin, and the lower half of the electrodes 4 to 6, the positioning member 7, the connecting portion of the covered wire 3 to the electrodes 4 to 6, and the upper surface and side of the elastic support member 2 In the step of bringing the electrodes into fluid-tight contact with the peripheral surface and supporting them integrally, the plurality of electrodes 4 to 6 are positioned by the positioning member 7, so there is no need for a separate electrode positioning tool.
Resin molding will be performed with accurate positioning.

Furthermore, when the resin molding is completed, the positioning member 7 and the connecting portions of the electrodes 4 to 6 and the covered wire 3 are buried in the covering member 1, so the electrodes 4 to 6 are supported by the covering member 1 and the positioning member 7. In this respect, the supporting strength of the electrodes 4 to 6 is high, the sealing performance of the connection between the electrodes 4 to 6 and the electric wire 3 is high, and the reliability of the connection is high because no force that would break the connection acts.

Furthermore, since the electric wire 3 passes through the electric wire through hole 2a having the ring protrusion 2c of the elastic support member 2, it is difficult for liquid to infiltrate from the outside along the outer peripheral surface of the electric wire 3 toward the connection part. Even if it infiltrates, it is blocked in front of the electrodes 4 to 6 connected to the ends of the covered wire 3, and does not leak beyond that point.

In addition, since the part that functions as an electrical connection device and the part that functions as a sealing device are integrated,
It has few components, is compact, and is easy to handle.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

1 and 2 show an electrical connection device according to an embodiment, FIG. 2 is a plan view, and FIG. 1 is an I-
It is an I line sectional view. In this example, three plate-shaped electrodes 4, 5 and 6 are provided. A thin plate-shaped coupling portion 4a is formed at one end of each electrode, and a core wire 3a drawn out from one end of the covered electric wire 3 is coupled to each coupling portion 4a. The three covered wires 3 are
It passes through each through hole 2a formed in the support member 2 made of rubber.

The support member 2 has a substantially cylindrical shape, and has unevenness 2b formed on its circumferential surface. In addition, unevenness 2c is also formed on the wall surface of each through hole 2a. These irregularities 2c increase the surface pressure of the contact portion with the covered electric wire 3, making this portion liquid-tight. A positioning member 7 is arranged so as to overlap the support member 2. The positioning member 7 is a disk-shaped portion 7 with a relatively large diameter.
a and a cylindrical portion 7b with a relatively small diameter.
Holes 7c are formed for guiding and positioning the electrodes 4, 5, and 6. The positioning member 7 is made of resin.

The device body 1 is made of resin, and covers a part of the support member 2, a part of the covered electric wire 3, a part of the electrodes 4, 5, and 6, and the positioning member 7, and forms them integrally. The device body 1 consists of a cylindrical portion and a cylindrical portion, and a key groove 1 for fixing the device body is provided in a part of the center of the outer peripheral surface.
a is formed. Parts of the electrodes 4, 5, and 6 protrude into the space 1b formed in the cylindrical portion. At one end of the cylindrical part, there is a protrusion 1 for engagement.
c is formed. Further, an annular groove 1d is formed on the circumferential surface of the cylindrical portion, and an O-ring 8 is fitted into the groove 1d. As shown in FIG. 1, the device body 1 fits into the hydraulic device housing 11 and is fixed to the housing 11 by a key plate 9 and bolts 10 that fit into the key grooves 1a. The other end of the covered wire 3 is immersed in oil within the housing 11. The other electrical connection device (not shown) fits into the cylindrical portion of the device body 1,
It is fixed by engaging with the protrusion 1c.

Next, an example of the manufacturing process of this electrical connection device will be explained. The coating on one end of the covered electric wire 3 is peeled off to expose the core wire 3a at the tip. Next, the core wires 3a of each of the three covered electric wires are brought into contact with the engaging portions 4a of the respective electrodes 4, 5, and 6, and the core wires 3a are caulked and fixed by the respective engaging portions 4a. Next, the electrodes 4, 5, and 6 are inserted into the holes 7c of the positioning member 7 from below (7b side) and positioned. Next, the other end of the covered wire 3 is inserted into the through hole 2a of the support member 2, and the support member 2 is inserted into the columnar part 7 of the positioning member 7 at one end.
Insert until it makes contact with b. The unit constructed in this manner is fitted into a mold formed to form the shape of the device body 1, and a predetermined resin is poured into the mold to form the device body 1. Then, the O-ring 8 is fitted into the formed groove 1d of the device body 1.

This electrical connection device prevents oil leakage as follows. An O-ring 8 prevents leakage between the housing 11 and the device body 1. Since one end of the coated wire 3 is immersed in oil, the oil flows through the gap between the core wires inside the coated wire 3 and the gap between the core wire and the coating due to capillary action, and the oil flows into the core wire inside the device body 1. It may reach part 3a. However, since there is no space at the end of the core wire 3a, no more oil will enter.
Therefore, oil does not leak outside the device body 1. Conversely, moisture etc. from the outside of the housing 11 does not leak into the housing 11.

[Effect] As described above, according to the present invention, for example, the covering member 1 is molded with resin, and the lower half of the electrodes 4 to 6,
The positioning member 7, the electrode 4 of the covered wire 3
In the step of bringing the connecting portions with electrodes 4 to 6 into liquid-tight contact with the upper surface and side circumferential surface of the elastic support member 2 and supporting them integrally, the plurality of electrodes 4 to 6 are positioned by the positioning member 7. Therefore, resin molding can be performed with accurate positioning without requiring a separate electrode positioning tool.

Furthermore, when the resin molding is completed, the positioning member 7 and the connecting portions of the electrodes 4 to 6 and the covered wire 3 are buried in the covering member 1, so the electrodes 4 to 6 are supported by the covering member 1 and the positioning member 7. In this respect, the supporting strength of the electrodes 4 to 6 is high, the sealing performance of the connection between the electrodes 4 to 6 and the electric wire 3 is high, and the reliability of the connection is high because no force that would break the connection acts.

Furthermore, since the electric wire 3 passes through the electric wire through hole 2a having the ring protrusion 2c of the elastic support member 2, it is difficult for liquid to infiltrate from the outside along the outer peripheral surface of the electric wire 3 toward the connection part. Even if it infiltrates, it is blocked in front of the electrodes 4 to 6 connected to the ends of the covered wire 3, and does not leak beyond that point.

In addition, since the part that functions as an electrical connection device and the part that functions as a sealing device are integrated,
It has few components, is compact, and is easy to handle.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention. FIG. 2 is a plan view of the exposed electrode portion of the embodiment viewed from above. FIG. 3 is a side view of a conventional electrical connection device. 1... Device body (coated member), 1a... Keyway, 1c... Protrusion, 1d... Groove, 2... Support member, 2a... Through hole (wire through hole), 2b, 2c
...Unevenness (2b...ring groove, 2c...ring protrusion), 3...covered wire (covered wire), 3a...core wire, 4, 5, 6...electrode (electrode), 4a...coupling Part, 7... Positioning member (positioning member), 7a
...Disk-shaped part (flange), 7b... Cylindrical part (trunk), 7c... Hole (electrode through hole),
8...O-ring, 9...key plate, 10...
Bolt, 11... Hydraulic system housing.

Claims (1)

[Claims for Utility Model Registration] An insulating positioning member having a trunk, a flange continuous at one end thereof, and a plurality of electrode through holes passing through the flange in the direction in which the trunk extends; a plurality of electrodes penetrating the top surface; a plurality of wire through holes extending in a direction perpendicular to the top surface; a ring protrusion formed on the inner wall surface of the wire through holes; and a ring groove formed on the side peripheral surface; an insulating elastic support member, both of which partially abuts the lower end surface of the main body; an insulating elastic support member that liquid-tightly penetrates the wire through hole and is located below the flange and facing a side surface of the main body; a plurality of covered electric wires connected to each other; and a lower half of the electrode, the positioning member, a connection portion of the covered electric wire with the electrode, and an upper surface and side peripheral surface of the elastic support member in liquid-tight contact. An electrical connection device comprising: an insulating covering member that integrally supports them;