JP6945936B2 - Protective structure of wiring parts - Google Patents

Description

The present invention relates to a protective structure for wiring parts in a vehicle such as a hybrid vehicle (HV).

Conventionally, some hybrid vehicles have an engine and a drive motor, which is a drive source for traveling, arranged in an engine room provided in the front part of the vehicle body.

In addition to the engine and drive motor, an electronic control unit for controlling the drive motor is arranged in the engine room. The electronic control unit has a built-in inverter that supplies a drive current to the drive motor. A harness extending from a battery that outputs a high voltage of about 200 to 350 V is connected to the inverter via a connector.

The high voltage current of the battery flows through the harness and connector. Therefore, it may be necessary to take protective measures for the harness and the wiring parts including the connector in order to prevent the harness from being broken or the connector from being damaged at the time of a frontal collision of the vehicle body. As a protective measure for wiring components, for example, it has been proposed to face a protective member such as a plate against the wiring component and protect the wiring component with the protective member.

Japanese Unexamined Patent Publication No. 2013-147046 Japanese Patent No. 4305456

However, in a vehicle model having a narrow engine room, a problem is likely to occur in the assembling property of the protective member, and there is room for ingenuity in providing the protective member.

An object of the present invention is to provide a protective structure for wiring parts, which can improve the assembling property of the protective member.

In order to achieve the above object, the wiring component protection structure according to the present invention is a structure for protecting the wiring component for supplying an electric current to the electronic control unit arranged in the front compartment of the vehicle body. A protective member for protecting the wiring component is arranged so as to face the rear surface of the electronic control unit to which the wiring component is connected and the wiring component is sandwiched between the rear surface and the protective member, and the protective member is fastened to the electronic control unit. The fastener to be used is provided so as to be operated from above the protective member.

According to this configuration, the protective member is arranged so as to sandwich the wiring component with the rear surface of the electronic control unit. Then, the protective member is fastened to the electronic control unit by a fastener operated from above the protective member. Therefore, even if the distance between the electronic control unit and the dash panel or cowl panel arranged behind the electronic control unit is short, the operator inserts a protective member from above between them and operates the fastener from above. Thereby, the protective member can be fastened to the electronic control unit.

The protective member preferably has a plurality of legs extending toward the electronic control unit on the side surface, and the tips of the legs face the electronic control unit with a gap.

In this configuration, for example, in the event of a frontal collision of the vehicle body, even if the electronic control unit moves rearward and the protective member is sandwiched between the electronic control unit and the dash panel or cowl panel behind it, the protective member receives it. The force can be distributed to multiple legs. Then, since the dispersed force is absorbed by each leg portion, it is possible to suppress the protective member from being greatly deformed, and it is possible to satisfactorily protect the wiring component.

Further, since the tips of the legs are separated from the electronic control unit, it is possible to suppress the generation of abnormal noise due to the contact between the legs and the electronic control unit when the electronic control unit vibrates.

The wiring component may be a harness and a connector for connecting the harness to the electronic control unit.

Further, a bracket may be fixed to the electronic control unit, and a protective member may be fastened to the bracket with a fastener.

According to the present invention, even if the space behind the electronic control unit is narrow, the protective member can be assembled to the electronic control unit from above the space, and the assembling property of the protective member can be improved.

It is a top view of the front part of the vehicle body of the vehicle which adopted the protection structure which concerns on one Embodiment of this invention. It is a perspective view which looked at the power unit and PCU from the left rear side. It is a side view which looked at the power unit and PCU from the left side. It is a side view which looked at the power unit and PCU from the right side.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<Structure of the front part of the car body>
FIG. 1 is a plan view of the front portion of the vehicle body 2 of the vehicle 1 in which the protective structure according to the embodiment of the present invention is adopted.

The vehicle 1 is, for example, a series-type hybrid vehicle. In the series hybrid vehicle, the power of the engine is converted into electric power by the generator, and the electric power generated by the generator is stored in the battery. Then, the drive motor is driven by the output of the battery, and the power of the drive motor is transmitted to the drive wheels.

The engine is arranged in an engine compartment (engine room) 3 provided in the front portion of the vehicle body 2 of the vehicle 1. Further, the generator and the drive motor are housed in the unit case 4 together with the gear mechanism, the differential gear and the like, and are integrated as the power unit 5.

The engine compartment 3 and the passenger compartment provided on the rear side are separated by a dash panel 6. A cowl panel 7 extending in the left-right direction is provided on the engine compartment 3 side of the upper part of the dash panel 6.

The power unit 5 is located on the front side of the dash panel 6 and adjacent to the left side of the engine. A PCU (Power Control Unit) 8 for controlling the power unit 5 is arranged on the upper side of the power unit 5. The PCU 8 is provided with an inverter, a microcomputer, and the like for driving a drive motor in a case 9 having a substantially rectangular parallelepiped shape forming an outer shell thereof.

FIG. 2 is a perspective view of the power unit 5 and the PCU 8 as viewed from the left rear side. FIG. 3 is a side view of the power unit 5 and the PCU 8 as viewed from the left side. FIG. 4 is a side view of the power unit 5 and the PCU 8 as viewed from the right side.

A PCU bracket 11 is attached to the unit case 4 of the power unit 5. The PCU bracket 11 extends upward from the unit case 4. The PCU 8 is supported by the PCU bracket 11 by fastening the case 9 to the PCU bracket 11 with bolts 12, and is in a downwardly inclined posture. There is at least a space in which the protector 13 can be arranged between the PCU 8 and the dash panel 6 and the cowl panel 7. The protector 13 will be described later.

A pipe 14 is provided at the rear end of the PCU 8 so as to straddle between the left side surface and the right side surface of the case 9. At the upper end of the left side surface of the case 9, a protrusion 15 is provided so as to project to the left side. As shown in FIG. 2, the left end of the pipe 14 is connected to a cylindrical boss portion 16 extending upward with respect to the protrusion 15. The boss portion 16 is fastened to the protrusion 15 with a bolt 17. As a result, the left end of the pipe 14 is fixed to the case 9. The intermediate portion of the pipe 14 extends in the left-right direction with a space upward from the upper surface of the rear end portion of the case 9. The right end of the pipe 14 bends downward and extends, and its tip is connected to a cylindrical boss 18 extending in the left-right direction, as shown in FIG. The boss portion 18 is fastened to the right side surface of the case 9 with bolts 19. As a result, the right end of the pipe 14 is fixed to the case 9.

As shown in FIG. 2, the first protector bracket 21 is fixed to the intermediate portion of the pipe 14 by welding. The first protector bracket 21 extends in the left-right direction along the middle portion of the pipe 14, and has a fixing portion 22 fixed to the middle portion of the pipe 14 and a substantially plate-like shape extending rearward from the left and right ends of the fixing portion 22. It has the extension portions 23 and 24 integrally.

Further, a second protector bracket 25 is integrally formed on the boss portion 18. The second protector bracket 25 is formed in a substantially plate shape extending rearwardly and downwardly from the boss portion 18 and having its tip end bent rearward.

A connector 32 attached to the tip of the harness 31 is connected to the rear surface of the case 9 of the PCU 8. The harness 31 is electrically connected to, for example, a battery arranged under the rear seats of the passenger compartment, and extends from the rear of the dash panel 6 through the dash panel 6 to the front of the dash panel 6. The connector 32 is connected to the rear surface of the case 9 from the rear side and is fixed to the case 9 with bolts 33.

<Protector>
A protector 13 is arranged in the space between the case 9 and the dash panel 6 and the cowl panel 7. The protector 13 is integrally formed by using, for example, a hot-rolled steel plate. The protector 13 includes a substantially rectangular plate-shaped covering portion 41 facing the rear surface of the case 9 with the tip end portion of the harness 31 and the connector 32 interposed therebetween, and extending portions 23 and 24 of the first protector bracket 21 from the upper end of the covering portion 41, respectively. 42, 43 upper fixing portions extending toward It has right leg portions 47, 48 extending forward from the central portion in the vertical direction and a right fixing portion 49 extending to the right from the upper end of the right leg portion 48.

The upper fixing portions 42 and 43 extend to the upper surfaces of the extending portions 23 and 24 of the first protector bracket 21, respectively. Then, the upper fixing portion 42 on the left side is fastened to the extending portion 23 by inserting the bolt 51 from above and screwing the bolt 51 into the extending portion 23. The upper fixing portion 43 on the right side is fastened to the extending portion 24 by inserting a bolt 52 from above and screwing the bolt 52 into the extending portion 24.

The left leg portion 44 has a plate shape extending toward the rear surface of the case 9, and its tip portion bends to the left and extends substantially parallel to the rear surface of the case 9. As shown in FIG. 3, a gap 53 is formed between the tip of the left leg 44 and the rear surface of the case 9, and the left leg 44 is not in contact with the rear surface of the case 9. The left legs 45 and 46 each have a plate shape extending toward the PCU bracket 11. There are gaps 54 and 55 between the tips of the left legs 45 and 46 and the rear surface of the PCU bracket 11, respectively, and the left legs 45 and 46 are not in contact with the rear surface of the PCU bracket 11.

As shown in FIG. 4, the right legs 47 and 48 each have a plate shape extending toward the rear surface of the case 9. The tip of the right leg 47 is bent to the right and extends substantially parallel to the rear surface of the case 9. A gap 56 is formed between the tip of the right leg 47 and the rear surface of the case 9, and a gap 57 is formed between the tip of the right leg 48 and the rear surface of the case 9. 47 and 48 are not in contact with the rear surface of the case 9.

The right fixing portion 49 extends to the upper surface of the tip end portion of the second protector bracket 25. The right fixing portion 49 is fastened to the second protector bracket 25 by inserting the bolt 58 from above and screwing the bolt 58 into the tip end portion of the second protector bracket 25.

<Effect>
As described above, the protector 13 is arranged so as to sandwich the harness 31 and the connector 32 with the rear surface of the case 9 of the PCU 8. Then, the protector 13 is fastened to the case 9 by bolts 51, 52, 58 operated from above the protector 13. Therefore, even if the distance between the case 9 and the dash panel 6 or the cowl panel 7 arranged behind the case 9 is short, the operator inserts the protector 13 from above between them and bolts 51 and 52 from above. , 58 can be operated to fasten the protector 13 to the case 9 of the PCU 8.

The protector 13 has left leg portions 44, 45, 46 and right leg portions 47, 48 extending forward on the side surface. The tips of the left leg 44 and the right leg 47, 48 face each other with a gap 53, 56, 57 from the case 9 of the PCU 8, respectively. Further, the tips of the left legs 45 and 46 face each other with a gap 54 and 55 from the PCU bracket 11.

Therefore, even if the PCU 8 moves rearward and the protector 13 is sandwiched between the case 9 of the PCU 8 and the dash panel 6 or the cowl panel 7 behind the PCU 8 at the time of a frontal collision of the vehicle body 2, the protector 13 receives a force. It can be dispersed in the left legs 44, 45, 46 and the right legs 47, 48. Then, the dispersed force is absorbed by the left leg portions 44, 45, 46 and the right leg portions 47, 48, so that the protector 13 can be suppressed from being greatly deformed, and the harness 31 and the connector 32 are satisfactorily protected. be able to.

Further, since the tips of the left leg 44 and the right legs 47 and 48 are separated from the case 9 of the PCU 8 and the tips of the left legs 45 and 46 are separated from the PCU bracket 11, the case 9 of the PCU 8 and the case 9 and the PCU 8 are separated from each other. When the PCU bracket 11 vibrates, it is possible to suppress the generation of abnormal noise due to the contact between the left leg portions 44 and the right leg portions 47, 48 and the case 9, and the contact between the left leg portions 45, 46 and the PCU bracket 11.

Further, since the tips of the left leg 44 and the right leg 47 are substantially parallel to the rear surface of the case 9, the PCU 8 moves rearward at the time of a frontal collision of the vehicle body 2, and the left leg 44 and the right leg Even if it comes into contact with each tip of the portion 47, the contact becomes a surface contact, and the pressure applied to the case 9 from the left leg portion 44 and the right leg portion 47 can be reduced. Therefore, it is possible to prevent the left leg portion 44 and the right leg portion 47 from sticking into the case 9, and it is possible to suppress damage to the parts housed in the case 9.

Further, since the tips of the left legs 45 and 46 face the rear surface of the PCU bracket 11, when the PCU bracket 11 moves rearward and comes into contact with the left legs 45 and 46 at the time of a frontal collision of the vehicle body 2. In addition, the impact can be absorbed by the deformation of the PCU bracket 11. As a result, damage to the PCU 8 can be suppressed, deformation of the protector 13 can be suppressed, and the harness 31 and the connector 32 can be satisfactorily protected.

<Modification example>
Although one embodiment of the present invention has been described above, the present invention can also be implemented in other embodiments.

For example, the vehicle 1 is not limited to a series hybrid vehicle, but may be a hybrid vehicle of another system such as a parallel system, or may be an electric vehicle, and the various vehicles are protected according to the present invention. The structure can be applied.

In addition, various design changes can be made to the above-mentioned configuration within the scope of the matters described in the claims.

1: Vehicle 2: Body 3: Engine compartment (compartment)
13: Protector 31: Harness (wiring parts)
32: Connector (wiring parts)
44, 45, 46: Left leg 47, 48: Right leg 51, 52, 58: Bolt 53, 54, 55, 56, 57: Gap

Claims (2)

It is a structure that protects the wiring parts for supplying electric current to the electronic control unit located in the front compartment of the vehicle body.
A protective member for protecting the wiring component is arranged so as to face the rear surface of the electronic control unit to which the wiring component is connected and to sandwich the wiring component with the rear surface.
A fastener for fastening the protective member to the electronic control unit is provided so as to be operated from above the protective member .
The protective member has a plurality of legs extending toward the electronic control unit.
The plurality of legs, the electronic control unit Ru includes legs which bracket facing supporting take protective structure. The plurality of legs, the electronic control unit and a gap Ru includes legs that face protective structure according to claim 1.

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