JP2004270897A - Transmission harness construction - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmission harness of favorable assemblage workability, stable and favorable connection quality, high reliability, and low cost. <P>SOLUTION: The transmission harness connects an electronic part such as an oil temperature sensor in a case of a transmission to a signal receiving part of the electronic part outside the transmission. It is composed of a low voltage wire for an automobile comprising conductive twisted wires as twisted core wires, that are covered with covering of a single kind of oil-resistant material. At parts where a bushing to seal the case of the transmission between the inside and the outside is applied, covering of the twisted core wires in the transmission harness is peeled to expose the twisted core wires, and they are untwisted at the parts to be parallel conductive wires. The bushing is then filled with insulation material by injection. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a structure of a transmission harness connected to an electronic component such as a shift position sensor mounted in a transmission oil for a vehicle such as an automobile, and transmitting a signal of the electronic component to a receiving portion of the airborne electronic component outside the transmission. About.
[0002]
[Prior art]
Conventionally, transmissions for vehicles such as automobiles have been connected to electronic components such as an oil temperature sensor, a shift position sensor, a vehicle speed sensor, and a hydraulic pressure detection sensor arranged in a transmission oil portion, and the signals of these various electronic components are A transmission harness is mounted outside the transmission oil portion (in the air) and transmitting to a receiving portion connected to the electronic component by a conductive wire. A schematic diagram of such a transmission portion is shown in FIG.
[0003]
In FIG. 5, the transmission is such that electronic components such as an oil temperature sensor 62 are disposed in an oil portion 14 and a receiving portion 20 of the oil temperature sensor 62 is disposed in the air 12, and the air 12 and the oil portion 14 form an outer shell of the transmission. Partitioned by a partition 10. A hole is formed in a part of the partition wall 10.
[0004]
The transmission harness that connects the receiving unit 20 and the oil temperature sensor 62 has a conductive twisted core wire derived from a connection terminal of the receiving unit 20 in the air 12 with a coating formed of a vinyl chloride material or a polyethylene material. The covered low-voltage wires for automobiles 30 are bundled with a heat-resistant tube 50, and a receiving portion is formed in a hollow bushing 19 formed of rubber or the like which fits as a sealing material in the hole so as to prevent oil 80 from leaking into the air 12. The connection terminals 20 are electrically connected by soldering or caulking. The oil temperature sensor 62 of the oil part 14 is a low-voltage automotive wire 30 in which a conductive twisted core wire is covered with a coating formed of an oil-resistant silicon material, and the twisted core wire is electrically connected to the oil temperature sensor 62; In the bushing 19, it is electrically connected to the connection terminal 40 by soldering or caulking. The inside of the bushing 19 is sealed with an epoxy resin. In addition, by adopting such specifications, the suction of the transmission oil from the twisted core wire due to the capillary phenomenon is prevented. As described above, in the conventional automobile transmission harness, the oil portion is made of an oil-resistant silicon material, and the aerial side is made of two kinds of covering materials such as a vinyl chloride material or a polyethylene wire.
[0005]
[Problems to be solved by the invention]
However, when electrically connecting the low-voltage wires for automobiles with the two types of coating materials of the harness in the aerial and oil parts, the conventional harness peels off the coating of the low-voltage wires for automobiles and exposes the conductive twisted core wire. Electrical connection to the connection terminal by soldering or caulking connection, but it takes processing man-hours required for electrical connection, such as tip processing such as wire sheath cutting, production of connection terminal, connection man-hour for connection terminal. Therefore, it is difficult to reduce the cost. In addition, the twisted core wire is electrically connected to the connection terminal by soldering or caulking connection in the bushing which is sealed with epoxy resin, but the epoxy resin and the conductive twisted core wire were covered by aging thermal stress. There was a case where a gap was formed between the sheath and the coating, and the oil 80 leaked into the air 12 through the gap.
[0006]
In view of the above problems, the present invention eliminates the use of two types of covering materials, such as an oil-resistant silicone material for the oil portion and a vinyl chloride or polyethylene wire for the aerial side, in an automotive transmission harness. A harness formed of one type of covering material is used. It is another object of the present invention to provide a low-cost, stable connection quality, good and highly reliable transmission harness by preventing the wicking of the stranded core wire in the wire coating from being sucked up.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention has the following configuration. That is, in claim 1, a hole is provided in the outer shell of the vehicle transmission so as to penetrate the oil of the transmission and the air outside the transmission, and an electronic component arranged in the oil is provided.
Comprising a receiving unit of the electronic component drawn out after the air,
A harness for electrically connecting the electronic component and the receiving unit;
The harness is bundled by twisting a plurality of bare conductive wires,
In a transmission harness in which the bundled outer periphery is covered with an insulating material,
The hole has a bushing that seals between oil and air,
Arrange the harness so as to penetrate the bushing,
The harness covers the conductive stranded core with a coating of a single material,
The part of the harness with which the bushing abuts is a non-insulating part without the insulating material,
The transmission harness is characterized in that the shape of the conductive wire in the non-insulating portion is a parallel shape without twist. According to a second aspect of the present invention, there is provided the transmission harness according to the first aspect, comprising a low-voltage wire for automobiles covered with a coating of an oil-resistant silicon material. In claim 3, the wire covering in the bushing exposes the conductive twisted core wire, and
The transmission harness according to any one of claims 1 to 2, wherein the respective conductive wires at the corresponding location are not spirally entangled with each other.
According to a fourth aspect of the present invention, there is provided the transmission harness according to any one of the first to third aspects, wherein the electric wire covering in the bushing exposes the conductive twisted core wire and the conductive wire at the corresponding location has a bent portion.
[0008]
[Action]
By using the above solution, the twisted core wire of the conductive wire in the bushing is exposed and the conductive wires are arranged in parallel with each other, so that the penetration of the epoxy resin sealed in the bushing is improved. By improving the adhesion between the epoxy resin and the stranded core, oil suction can be prevented, and a low cost, stable connection quality, and a highly reliable transmission harness can be provided.
[0009]
【Example】
An embodiment according to the present invention will be described with reference to FIGS. FIG. 1 is a schematic view of a transmission portion on which a transmission harness is mounted, showing an embodiment to which the technology of the present invention is applied. FIG. 2 is a view showing a state in which a coating of a low-voltage wire for automobiles constituting a transmission harness representing an embodiment to which the technology of the present invention is applied is exposed, a stranded core wire is exposed, and each conductive wire is untwisted. is there. FIG. 3 is a diagram showing a state of another low-voltage wire for an automobile in FIG. FIG. 4 is a view showing a state of still another low-voltage wire for automobiles in FIG.
[0010]
According to FIG. 1 to FIG. 4, the transmission harness according to the embodiment of the present invention is a rubber that fits into a hole provided in a part of a partition wall 10 which is an outer shell of the transmission as a sealing material in the air and oil for the transmission. An oil temperature sensor 62 disposed in a transmission oil portion and connected to the oil temperature sensor 62 outside the transmission oil portion (in the air). A low-voltage wire for automobiles 31 in which the outer periphery of a twisted core wire obtained by twisting and bundling a plurality of bare conductive wires for transmitting the signal of the temperature sensor 62 to the receiving unit is covered with a coating of an oil-resistant insulating material 31a. However, one end of the vehicle low-voltage wire 31 is electrically connected to the connection terminal of the receiving unit 20 of the air 12 by soldering or caulking, and In the portion where the bushing abuts, the coating of the automotive low-voltage wire 31 is stripped, the twisted core wire is exposed, and the insulating material 31a is used as a non-insulated portion, and the conductive wire shape in the non-insulated portion has no twist. The other end of the low-voltage wire 31 for an automobile is electrically connected to the oil temperature sensor 62 of the oil part 14 by soldering or caulking, and the inside of the bushing 18 is sealed with epoxy resin. Further, the low-voltage wires 31 for automobiles are bundled together in the air and oil in a heat-resistant tube 50.
[0011]
Further, as another configuration, any state, for example, each conductive wire may be used as long as each of the conductive wires is not twisted, that is, each of the conductive wires is not entangled with each other in a spiral shape. It may be configured in a swollen state such as 3. In this way, when the inside of the bushing 18 is sealed with epoxy resin, the epoxy resin penetrates to the deep portion of the bundle of core wires, and the adhesion between the epoxy resin and the core wire portion is improved, thereby preventing oil absorption. Can be. Further, the low-voltage wire 31 for an automobile is configured in a state in which the conductive wires are not entangled with each other in a spiral shape as shown in FIG. You may. With this configuration, although not shown, when the automobile low-voltage wire 31 passes through the bushing 18 of the transmission harness assembly, the coating of the automobile low-voltage wire 31 is stripped by the bent portion A, and the twisted core wire is used. And a positioning means for exposing the portion to the inside of the bushing. Next, when the inside of the bushing 18 is sealed with epoxy resin, the epoxy resin of the sealing material penetrates to the deep part of the bundle of core wires, and the oil suction path is not linear due to the bent portion A, and the path is extended. Further suction of oil can be prevented. Also, a plurality of bent portions A of this configuration may be present on the line where the coating is exposed and the stranded core wire is exposed. Note that the oil temperature sensor is an example of the present embodiment, and electronic components such as an oil amount sensor arranged in another oil can have the same structure.
[0012]
In the above embodiment, the material of the coating covering the twisted core wire of the low-voltage wire 31 for an automobile is applicable as long as it has a single oil-resistant material that satisfies the characteristics of the low-voltage wire for an automobile. For example, it is possible to adopt a configuration in which the material of the covering that covers the twisted core wire is an oil-based silicon material. With the configuration described above, the suction of the transmission oil is prevented by the capillary phenomenon that propagates from the middle of the oil through the twisted core wire.
[0013]
【The invention's effect】
By configuring the present embodiment as described above, the twisted core wire of the conductive wire is exposed, the twisted core wire is exposed, the non-insulated portion without the insulating material is used, and the shape of the conductive wire in the non-insulated portion eliminates the twist. The parallel shape makes it possible for the epoxy resin to penetrate deep into the bundle of core wires, and by improving the adhesion between the epoxy resin and the core wire, oil suction can be prevented. A highly reliable transmission harness can be provided. Further, the transmission harness of the embodiment of the present invention uses a low-voltage wire for automobiles in which a conductive twisted core wire is covered with a single type of oil-resistant insulating material covering, so that the conductive twist in the bushing is reduced. Stripping the core wire requires man-hours, but the conventional low-voltage wires for automobiles made of two types of coating materials are electrically connected to the connection terminals in the bushing by soldering or caulking. There is no need for processing steps required for electrical connection, such as tip processing such as coating cutting, creation of connection terminals, and connection man-hours for connection terminals, and there is no need for connection terminals in the bushing, so low cost and A highly reliable transmission harness can be provided.
[Brief description of the drawings]
FIG. 1 is a schematic view of a transmission portion on which a transmission harness is mounted, showing an embodiment to which the technology of the present invention is applied.
FIG. 2 is a diagram illustrating a transmission harness representing an embodiment to which the technology of the present invention is applied.
FIG. 3 is a diagram showing a state of another low-voltage wire for an automobile in FIG. 2;
FIG. 4 is a view showing a state of still another low-voltage wire for automobiles in FIG. 2;
FIG. 5 is a schematic view of a transmission portion to which a transmission harness to which the related art is applied is mounted.
[Explanation of symbols]
In the drawings, the same reference numerals indicate the same or corresponding parts.
DESCRIPTION OF SYMBOLS 10 Partition wall 12 Air 14 Oil part 18 Bushing 19 Bushing 20 Receiving part 30 Low-voltage wire 31 for vehicles Low-voltage wire 31a for vehicles Insulation material 40 Connection terminal 50 Heat resistant tube 62 Oil temperature sensor 80 Oil

Claims (4)

An outer part of the vehicle transmission is provided with a hole that penetrates the oil of the transmission and the air outside the transmission, and electronic components arranged in the oil,
Comprising a receiving unit of the electronic component drawn out after the air,
A harness for electrically connecting the electronic component and the receiving unit;
The harness is bundled by twisting a plurality of bare conductive wires,
In a transmission harness in which the bundled outer periphery is covered with an insulating material,
The hole has a bushing that seals between oil and air,
Arrange the harness so as to penetrate the bushing,
The harness covers the conductive stranded core with a coating of a single material,
The part of the harness with which the bushing abuts is a non-insulating part without the insulating material,
A transmission harness, wherein the shape of the conductive wire in the non-insulating portion is a parallel shape without twist. 2. The transmission harness according to claim 1, wherein the transmission harness comprises a low-voltage wire for automobiles covered with a coating of an oil-resistant silicon material. The wire coating in the bushing exposes the conductive twisted core wire, and
3. The transmission harness according to claim 1, wherein the respective conductive wires at the location are not spirally entangled with each other. The wire coating in the bushing exposes the conductive twisted core wire, and
4. The transmission harness according to claim 1, wherein said conductive wire has a bent portion.

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