JP4525397B2 - connector - Google Patents

Description

  The present invention relates to a connector, and more particularly to a connector used for a connection portion to which vibration is applied.

  The connector is a component used for a portion to which the electrical wiring is connected. However, particularly when used for a wire harness to which vibration is applied to a vehicle or the like, the connector may be detached by vibration in a normal connector.

JP 2001-176602 A (Patent Document 1) improves the adhesion between the connector and the anti-vibration cover by inserting a rubber member between the connector and the anti-vibration cover in the connector used in such a vehicle. A technique for ensuring an anti-vibration function is disclosed.
JP 2001-176602 A JP 2003-68417 A JP-A-8-17536 Japanese Utility Model Publication No. 7-42070

  In recent years, electric vehicles, fuel cell vehicles, and hybrid vehicles have attracted attention because of high fuel efficiency and environmental considerations. These vehicles include a motor for driving wheels, a high voltage battery, and the like, and a power cable capable of flowing a high voltage and large current is used to transmit electric power to them.

  The power cable is connected to the motor by a connector for ease of assembly and maintenance. Such a connector is larger than a connector used for a conventional in-vehicle wire harness or the like.

  When a large connector vibrates due to the vibration of the motor, noise may be generated due to the vibration of the connector.

  However, in the connector with an anti-vibration function described in Japanese Patent Application Laid-Open No. 2001-176602 (Patent Document 1), it has been studied to suppress the vibration of the connector and prevent the connector from coming off. Is not disclosed for suppressing the diffusion of the sound generated by the connector (a sound generated by vibrating part or all of the surface of the connector like a drum surface).

  An object of the present invention is to provide a connector in which sound generated from the connector due to vibration is reduced.

  In summary, the present invention is a connector, and includes a main body portion that supports wiring, and a soundproof member that is attached to at least a first surface of the main body portion and absorbs sound emitted from the main body portion due to vibration. .

  Preferably, the soundproofing member includes a cover portion facing the first surface, and a sound absorbing material positioned between the cover portion and the first surface.

  More preferably, the soundproofing member further includes a sound insulating material provided in the cover portion so as to surround the sound absorbing material.

  More preferably, the connector further includes a fastening member that fastens the cover portion to the main body portion.

  More preferably, the main body is made of metal and the cover is made of resin.

  Preferably, a part of the main body is inserted into a housing that vibrates during operation, and the soundproof member is attached to a portion of the main body that protrudes from the housing in a state where the main body is partially inserted into the housing. .

  Preferably, the main body has a shape that is wider than the height of the cross section. The first surface is a surface along the width direction in the cross section.

  Preferably, the main body includes a first member provided with a recess for storing the wiring, and a second member for covering the wiring on the first member and covering the wiring. The first surface is a part of the second member.

  Preferably, the main body is attached to a case of a vehicle-mounted rotating electrical machine, and the wiring is a power wiring that supplies power to the vehicle-mounted rotating electrical machine.

  More preferably, the power wiring includes a plurality of power cables. The plurality of power cables are housed in the main body side by side. The first surface is a surface along the direction in which the plurality of power cables are arranged.

  According to the present invention, it is possible to prevent sound emitted from the surface of the connector fastened to the vibrating body from spreading to the surroundings.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

  FIG. 1 is a block diagram showing a configuration of a vehicle in which a connector according to an embodiment of the present invention is used. Examples of the vehicle include an electric vehicle, a hybrid vehicle, and a fuel cell vehicle.

  Referring to FIG. 1, this vehicle includes a DC power supply 2, a boost converter 4 that boosts the output voltage of DC power supply 2, an inverter 6 that converts the DC voltage boosted by boost converter 4 into three-phase AC, A transaxle 10 incorporating a motor driven by an inverter 6, a differential gear 12 coupled to an output shaft of the transaxle 10, and wheels 14 and 16 driven by the differential gear 12 are included.

  The inverter 6 and the transaxle 10 are connected by a three-phase power cable 18. A connector 8 is used at a connecting portion between the power cable 18 and the transaxle 10.

  FIG. 2 is a perspective view of the connector 8.

  FIG. 3 is a rear view of the connector 8.

  Referring to FIGS. 2 and 3, the connector 8 is attached to the main body portion supporting the power cable and the upper surface, which is the main sounding surface of the main body portion, by bolts 32 and 34, and generates a sound emitted from the main body portion due to vibration. And a soundproof member 26 for absorbing.

  The main body is attached to the case of the transaxle 10 of FIG. 1 including a vehicle-mounted rotating electrical machine. The power cable is a power wiring that supplies power to the on-vehicle rotating electrical machine.

  The connector 8 further includes terminals 30U, 30V, and 30W electrically connected to the power cables 18U, 18V, and 18W, a connector insertion portion 36 that supports the terminals 30U, 30V, and 30W, and a connector insertion portion 36, respectively. And a collar portion 28 provided at the insertion limit so as to be inserted up to a predetermined length.

  The main body of the connector 8 has a base 22 provided with bulges 22U, 22V and 22W for receiving three power cables 18U, 18V and 18W, respectively, and a state where the power cables 18U, 18V and 18W are received in the base 22. And a lid portion 24 that covers the lid.

  Since the main body portion of the connector 8 supports the three power cables arranged side by side, it has a shape wider than the height of the cross section. Therefore, it has a wide and flat shape, and has a structure in which sound is easily generated by vibration from the lid portion 24. The sound generation surface to which the soundproof member 26 is attached is a surface along the width direction in the cross section.

  The main body of the connector is inserted into the casing of the vehicle transaxle 10 that vibrates during operation up to the flange 28. The soundproof member 26 is attached to a portion of the main body that protrudes from the housing in a state where a part of the main body is inserted into the housing.

  The base 22 is provided with valleys 38, 40 between the bulges 22U, 22V, 22W when viewed from the back side. For this reason, the base 22 has a structure with high rigidity even with the same thickness as the lid 24. Therefore, it is considered that the lid portion 24 is more likely to vibrate and emit a sound than the base portion 22.

  In the example shown in FIG. 2, the soundproof member 26 is attached to the surface on the side of the lid portion 24, which is considered to easily generate sound. That is, the soundproofing effect can be obtained by attaching the soundproofing member 26 on one side. A soundproof member may be further attached to the surface on the base 22 side.

  FIG. 4 is a perspective view of the soundproof member 26 viewed from the front side.

  FIG. 5 is a perspective view of the soundproof member 26 as seen from the back side.

  4 and 5, the soundproof member 26 includes a cover portion 50 that faces the sound generation surface of the connector 8, and a sound absorbing material 56 that is positioned between the cover portion 50 and the sound generation surface.

  The soundproofing member 26 further includes a sound insulating material 52 provided so as to surround the sound absorbing material 56 so that the sound absorbing material 56 can absorb sound without sound leakage.

  As the sound absorbing material 56, for example, laminated polyester nonwoven fabric, glass wool, urethane, or the like can be used. As the sound insulating material 52, for example, an open-cell type flexible sponge-like foam obtained by foaming a mixture of a synthetic rubber and a flame retardant can be used. These sound-absorbing materials and sound-insulating materials may be general materials that are often used for interior parts of vehicles.

  The cover portion 50 is provided with bolt through holes 58 and 60 for fastening to the base portion 22 together with the lid portion 24 of the main body portion of the connector. The bolt through holes 58 and 60 are respectively penetrated by the bolts 32 and 34 of FIG. 2, and the bolts 32 and 34 are fastened with nuts.

  FIG. 6 is a view showing a VI-VI cross section in FIG. 3.

  Referring to FIG. 6, base 22 and lid 24 of the main body are made of metal such as aluminum, and cover 50 is made of resin.

  The base 22 is a first member of the connector main body provided with a recess for storing the wiring. The lid 24 is a second member that covers the wiring on the base 22 that is the first member. The soundproof member cover 50 is attached to the upper surface of the lid 24 by bolts 32A, 34A and nuts 32B, 34B.

  By attaching with the bolts 32A, 34A and the nuts 32B, 34B, the sound insulating material 52 is moderately crushed so as to be flush with the cover portion 50, and sound leakage is prevented. In this state, the sound absorbing material 56 is in contact with or preferably close to the lid portion 24.

  Electric power is transmitted to the motor for vehicles by several power cable 18U, 18V, 18W. Power cables 18U, 18V, and 18W each include a conductive metal core wire and an insulating coating that covers the conductive metal core wire. The power cables 18U, 18V, 18W are housed in the base 22 of the connector main body side by side as shown in FIG. The surface to which the cover 50 of the soundproof member is attached is a surface along the direction in which the power cables 18U, 18V, 18W are arranged, and is the upper surface of the lid 24.

  FIG. 7 is a diagram showing data obtained by observing sound from the connector when the soundproofing member 26 is attached to the connector of the present embodiment and when it is not attached.

  In FIG. 7, the case where the soundproof member 26 is attached to the connector main body is shown by a solid line, and the case where the soundproof member 26 is not attached is shown by a broken line. As shown in FIG. 7, the peak value of the sound pressure is lowered by 2 db at a frequency of about 3000 Hz, and the effect of the soundproofing member is recognized.

  As described above, according to the present embodiment, it is possible to prevent the sound emitted from the connector from spreading to the surroundings. Thereby, it can contribute to implement | achieving a quiet vehicle especially for vehicle-mounted use. Of the vehicles, the connector of the present embodiment contributes greatly when the interior of the vehicle is quiet, particularly in a vehicle with low running noise such as a hybrid vehicle or a fuel cell vehicle.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 is a block diagram showing a configuration of a vehicle in which a connector according to an embodiment of the present invention is used. 3 is a perspective view of a connector 8. FIG. 6 is a rear view of the connector 8. FIG. It is the perspective view which looked at the soundproof member 26 from the front side. It is the perspective view which looked at the soundproof member 26 from the back side. It is the figure which showed the VI-VI cross section in FIG. It is the figure which showed the data which observed the sound from a connector when not attaching with the soundproof member 26 to the connector of this Embodiment.

Explanation of symbols

  4 Boost Converter, 6 Inverter, 8 Connector, 10 Transaxle, 12 Differential Gear, 14, 16 Wheel, 18 Power Cable, 18U, 18V, 18W Power Cable, 22 Base, 24 Lid, 26 Soundproof Member, 28 Hook, 30U, 30V, 30W terminal, 32B, 34B nut, 32, 34, 32A, 34A bolt, 36 connector insertion part, 38, 40 valley part, 50 cover part, 52 sound insulation material, 56 sound absorption material, 58, 60 bolt through hole .

Claims (5)

A connector,
A main body that supports the wiring;
A soundproofing member attached to at least the first surface of the main body and for absorbing sound emitted from the main body due to vibration;
A part of the main body is inserted into a housing that vibrates during operation ,
The soundproof member is
A cover portion facing the first surface;
A sound absorbing material positioned between the cover portion and the first surface;
Including a sound insulating material provided in the cover part so as to surround the sound absorbing material,
The main body is
A first member provided with a recess for storing the wiring;
A second member that covers the wiring on the first member and covers the second member;
The first surface is part of the second member;
The connector is
A connector further comprising a fastening member for fastening the cover part to the body part . The main body is attached to a case of an on-vehicle rotating electrical machine,
The wiring is a plurality of power cables for supplying power to the on-vehicle rotating electrical machine,
The plurality of power cables are housed in the main body side by side,
The connector according to claim 1, wherein the first surface is a surface along a width direction in the cross section. The connector according to claim 1, wherein the main body has a shape wider than a height of a cross section. The main body is made of metal,
The connector according to any one of claims 1 to 3 , wherein the cover portion is made of resin. The soundproof member, the main body portion is attached to a portion of the body portion which projects from the housing in a state in which a part is inserted into the housing, the connector according to any one of claims 1-4 .

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