JPH06223903A - Wiring structure for oil filled equipment - Google Patents

Abstract

PURPOSE:To increase the reliability of an oil filled equipment by making possible the simplifying of the wiring work and the downsizing of a case for the oil filled equipment and extremely reducing the treatment for jointing in the middle part of a wire harness. CONSTITUTION:A plurality of female-type junction terminals are inserted into a connector housing 14 and tided, both end parts of which are projected within both hood parts 14a, 14b. A part of the junction terminals is a joint type which the one end is divided into twit branches. A junction connector 13 is fixed in the case 11 of an automatic gear, and an internal electric wire 17 connected to a group of electric parts within the automatic gear is connected to an external electric wire 18 connected to a control device for a vehicle, so that the operations of inserting a group of electric wires through the case 11 may be eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring structure for oil-filled equipment such as an automatic transmission for automobiles, which has an improved structure for leading out electrical wiring from the case of the oil-filled equipment.

[0002]

2. Description of the Related Art For example, an automatic transmission of an automobile is constructed by arranging mechanical elements such as a torque converter and a gear type auxiliary transmission in a case filled with lubricating oil. Various electric parts such as an actuator for controlling the movement of the elements and a sensor for detecting the oil temperature are also provided. Since the actuators and sensors in the case need to be connected to the external control circuit via connectors, the wire group (wire harness) connected to these electric parts will pass through the through holes formed in the case and The harness lead-out hole is led out and is processed in a liquid-tight manner so that the lubricating oil does not leak out.

[0003]

By the way, in this kind of automatic transmission, the number of electric parts such as actuators and sensors provided in the case has increased along with the advancement of high functionality in recent years. Tend to do. This means that the number of circuits of the wire harness penetrating the case increases, so that the harness itself becomes thick and difficult to bend, and the connector at the tip of the wire harness becomes large. Therefore, the work of inserting the wire harness into the through hole of the case becomes considerably difficult. In addition, in order to improve the workability of the insertion work as much as possible, there is no choice but to enlarge the through hole, so that the case itself has to be enlarged.

Further, this type of wiring structure often requires joint processing for branching a circuit from the middle of the wire harness or connecting a plurality of circuits to each other.
Therefore, conventionally, the coating of the electric wire is stripped in the middle of the wire harness and the joint process is performed using a splice terminal or the like, which is also a problem in that the work is troublesome.

Further, such joint processing is preferably performed on a portion of the wire harness located outside the case. This is because providing the joint part of the cable in the case immersed in the lubricating oil of high temperature causes a problem in connection reliability. However, if the joint part is provided only on the wire harness outside the case, the number of cables of the wire harness penetrating the harness through hole increases, and as described above, the workability is reduced due to the increase in the diameter of the harness and the harness. This causes problems such as enlargement of the case due to an increase in diameter of the through hole.

The present invention has been made in view of the above circumstances. The purpose is to simplify the wiring work and make the case of the oil-filled equipment smaller, and to reduce the joint processing from the middle of the wire harness as much as possible to improve reliability and further improve workability. It is an object of the present invention to provide a wiring structure for oil-filled equipment.

[0007]

In the wiring structure for an oil-filled device according to the present invention, a through hole is provided in the case of the oil-filled device, and a relay connector is attached in a liquid-tight manner so as to close the through hole. The invention is characterized in that an internal electric wire extending from an electric component is connected to a relay connector, and an external electric wire is connected to the relay connector (the invention of claim 1).

Further, the relay connector may be constructed such that some of the plurality of terminals are connected to each other in the relay connector (the invention of claim 2).

[0009]

Since the internal and external electric wires are connected through the relay connector provided in the case, when assembling the oil-filled equipment, the relay connector is attached to the through hole formed in the case, and the internal and external electric wires are connected to the relay connector. It is only necessary to connect, and the work is easy, unlike the conventional case where it was necessary to insert a thick wire harness into the through hole.

Further, in the structure of claim 2 in which a part of the terminal group of the relay connector is connected to each other, joint processing in the middle of the wire harness becomes unnecessary.

[0011]

As described above, according to the wiring structure of the present invention, it is only necessary to connect the inner and outer wires to the relay connector attached to the case, and it is not necessary to insert the wire harness into the through hole. Wiring work becomes easy. Also,
The through hole does not need to be set large in consideration of the insertion work of the wire harness, and since the through hole may have the smallest size to which the relay connector can be attached, there is no fear that the case will be enlarged due to the through hole.

Further, according to the invention of claim 2 in which a part of the terminal group of the relay connector is connected to each other, the joint process in the wire harness becomes unnecessary, and the manufacturability is further enhanced. Moreover, the reliability can be greatly improved as compared with the case where the joint process is performed on the internal wiring.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is applied to a wiring structure in an automatic transmission of a vehicle will be described below with reference to FIGS.

The automatic transmission of this embodiment is, as is well known,
Inside the case filled with lubricating oil, the mechanical elements of the torque converter and gear type auxiliary transmission, and various electrical parts such as actuators that control the movement of these mechanical elements and sensors for oil temperature detection are arranged. Is configured. As shown in FIG. 1, a through hole 12 is formed at a predetermined position of the case 11, and a relay connector 13 is attached thereto.

The detailed structure of the relay connector 13 is shown in FIG. This is a form in which hood portions 14a and 14b are provided at both ends of a rectangular connector housing 14, and a flange portion 14c is provided so as to project on the outer periphery of the connector housing 14, and the flange portion 14c serves as a mounting screw (not shown). Fixed to the case 11. Further, a gasket 15 is provided on the outer periphery of the connector housing 14 along the flange portion 14c so that the space between the connector housing 14 and the inner peripheral edge portion of the through hole 12 is liquid-tight when the relay connector 13 is attached. To be sealed. In this embodiment, the connector housing 14 is made of nylon or nylon mixed with glass fiber.

A plurality of male relay terminals 16 are integrally provided on the connector housing 14 by insert molding, and both ends of these are protruding into the hood portions 14a and 14b. In this embodiment, the relay terminal 16 has three types of shapes as shown in FIG. 4, and of these, two types drawn at the center and the right side in the figure are joint types. These two types of joint type relay terminals 16 are
Both of them branch into a bifurcated shape through a joint portion 16a at approximately the center, and one end has a two-terminal shape and the other end has a one-terminal shape. Therefore, when this joint type relay terminal 16 is embedded in the connector housing 14, as shown in FIG.
The terminal projects and one terminal projects on the other hood portion 14b, and these three terminals are electrically connected to each other in the connector housing 14.

Now, when the above-mentioned relay connector 13 is fixed to the case 11 of the automatic transmission, as shown in FIG. 1, an internal electric wire 17 connected to an electric component group (not shown) in the automatic transmission. The external electric wire 18 connected to a vehicle control device (not shown) can be connected to the relay connector 13. The internal electric wire 17 has a small female connector 17a connected to each connector of the electric component on one end side and a female connector 17b on the other end side and has, for example, a crosslinked fluororesin coating. Although not shown, the female connector 17b has female terminals equal to the total number of terminals in the hood portion 14a of the relay connector 13, and is inserted into the hood portion 14a to be connected to each terminal in the hood portion 14a. It Further, the external electric wire 18 also has a small female connector 18a connected to the control device of the vehicle at one end side and a female connector 18b at the other end side. The female connector 18b also has female terminals equal to the total number of terminals in the hood portion 14b of the relay connector 13 (less than that in the hood portion 14a). Connected to each terminal of.

According to the above-described embodiment, when the wiring is led out to the control device side of the vehicle from the electric component group provided in the automatic transmission, the relay connector 13 is attached to the case 11 of the automatic transmission in advance. It suffices to insert and connect the female connectors 17b and 18b of the internal electric wire 17 and the external electric wire 18 here, and it is not necessary to insert the electric wire group into the through hole formed in the case. For this reason, even in a situation in which a device of this kind has been multi-circuited and the electric wire group has become thick in recent years, the work of inserting the electric wire group becomes unnecessary, and therefore the wiring deriving work becomes extremely simple. Further, the through hole 12 may have a minimum size to which the relay connector 13 can be attached,
There is no need to increase the diameter of the through hole in consideration of the work of inserting the wire group. Therefore, even if the number of circuits is large, the size of the through hole 12 can be small, and there is no fear that the case 11 of the automatic transmission becomes large.

By the way, two or more electric wires are usually extended from each electric component such as an actuator and a sensor in the automatic transmission, but some of them may be common to each other. For example, if there are two individually controlled actuators, two electric wires for each of the power supply line and the ground line are derived from each actuator, and a total of four electric wires are used. The ground lines of both actuators can be used in common with each other. Therefore, connect the two earth lines to case 11
If joint processing is performed inside, the number of electric wires that must be led out from the case 11 of the automatic transmission should be reduced. If the number of circuits to be led to the outside is reduced, the electric wire group becomes thin, which has many advantages, but conventionally, it was not possible to perform the joint processing in the case as described above. The reason is the environment within the automatic transmission. That is, the inside of the case 11 is soaked in lubricating oil, the temperature becomes considerably high when the vehicle is traveling, and much vibration occurs. If the joint-processed portion of the electric wire is placed in such a bad environment, the reliability will be deteriorated, for example, a connection failure will occur early. For this reason, conventionally, the joint process is not performed in the case of the automatic transmission, but the thick electric wire group is unavoidably led out through the case, and the troublesome joint process is performed outside the case.

On the other hand, according to this embodiment, since some of the relay terminals 16 provided in the relay connector 13 are joint-shaped, the inner and outer electric wires 17, 1 are formed.
It is not necessary to perform the troublesome joint processing in 8.
The wire harness manufacturing process is simplified. Of course, since the joint processing is performed in the relay connector 13, the number of circuits of the external electric wire 18 can be reduced, and moreover, the joint portion is located in the connector housing 14, and the high temperature lubrication in the case 11 is performed. Since it is not exposed to oil, extremely high electrical connection reliability can be obtained.

5 and 6 show a second embodiment of the present invention. The difference from the first embodiment is the method of joint processing in the relay connector 13. In the first embodiment, as shown in FIG. 4, the joint-type relay terminal 16 in which the terminal on one end side is bifurcated is used. However, in the second embodiment, the printed board 21 is used for joint processing. Is going. As shown in FIG. 6, a plurality of conductor patterns 22 are formed on the printed circuit board 21, some of which are bifurcated by the joint portions 22 a. A terminal 23 that bends in an L shape is soldered. This printed circuit board 21
5 is insert-molded so as to be embedded in the connector housing 14 as shown in FIG. 5, and the tips of the terminals 23 project into the hood portions 14a and 14b of the connector housing 14. It goes without saying that even with this structure, the same effects as those of the first embodiment can be obtained.

FIG. 7 shows an example in which the internal electric wire 30 housed in the case 11 is composed of a flat cable 31. On one end side of the flat cable 31, a plurality of connectors 30 connected to electric parts in the case of the automatic transmission are provided.
a is provided, and a connector 30b connected to a relay connector (not shown) is provided on the other end side. The other structure is the same as that of the above-described embodiment, and therefore, the same effect is obtained.

Further, FIG. 8 shows an example in which the relay terminal 41 provided in the relay connector 40 is bent in a stepped shape. In this way, each hood portion 1 of the connector housing 14
The pitch between the tips of the terminals protruding into 4a and 14b can be made different vertically.
By narrowing the pitch between the terminals on the inner side, it is possible to reduce the size of the through hole 12 formed in the connector housing 14 and further in the case 11.

In addition, the present invention is not limited to the wiring structure of the automatic transmission. For example, the shape of the connector is not limited to the rectangular shape and may be a round shape. The present invention can be implemented in various ways without departing from the scope of the invention, such as being widely applicable to the wiring structure of devices that need to lead wires.

[Brief description of drawings]

FIG. 1 is a front view of a wiring structure showing a first embodiment of the present invention.

FIG. 2 is a vertical sectional view of a relay connector.

FIG. 3 is a partially cutaway perspective view of a relay connector.

FIG. 4 is a perspective view showing a relay terminal.

FIG. 5 is a vertical sectional view showing a second embodiment of the present invention.

FIG. 6 is a perspective view showing a printed circuit board on which terminals are mounted.

FIG. 7 is a perspective view showing an example using a flat cable.

FIG. 8 is a vertical sectional view showing an example in which the terminal pitch is different.

[Explanation of symbols]

 11 ... Case 12 ... Through hole 14 ... Connector housing 17 ... Internal electric wire 18 ... External electric wire

Claims (2)

[Claims] 1. A structure for leading an electric wire out of a case from an electric part provided in a case of an oil-filled device, wherein a through hole is provided in the case and the relay connector is closed by closing the through hole. A wiring structure for oil-filled equipment, characterized in that an internal electric wire that is tightly attached and extends from the electric component is connected to the relay connector, and an external electric wire is connected to the relay connector. 2. The wiring structure for oil-filled equipment according to claim 1, wherein the relay connector has a plurality of terminals, and some of the terminals are connected to each other in the relay connector.