JP3810780B2 - Arrangement structure of high voltage line - Google Patents

Description

  The present invention relates to a routing structure for a high-voltage line such as a power line of a vehicle having at least a motor as a drive source.

  In general, in a vehicle such as a hybrid vehicle equipped with a motor in addition to an engine as a drive source, the motor is disposed at the front of the vehicle and an electrical device such as a high voltage battery is disposed at the rear of the vehicle for the convenience of arrangement space. It is installed. And the power supply line which connects the said motor and electrical equipment is arranged from the said vehicle front part to the rear part (for example, refer patent document 1). Since this type of vehicle uses a high voltage power supply as a motor power supply, the outer diameter of the power supply line (hereinafter referred to as a high voltage line) is significantly larger than that for a low voltage, and as a result, the high voltage line There were limited routing routes. Therefore, in the vehicle, the high-voltage line is routed on the lower surface of the floor panel so as to secure a routing route, and the high-voltage line is disposed between the sub-frame that supports a driving device such as an engine and the floor panel. There is something that has been arranged.

An example of this will be described with reference to FIG. A drive unit 62 is fixed on the subframe 61 at the front of the vehicle body. This drive unit 62 is a drive unit for a parallel hybrid vehicle in which a motor M is sandwiched between an engine E and a transmission T. The motor M performs driving assistance of the engine E and deceleration regeneration. The motor M and a high voltage battery (not shown) arranged at the rear of the vehicle body are connected via a high voltage line 63. The high-voltage line 63 is routed along the floor panel 64 from the rear of the vehicle body where the high-voltage battery is disposed, and rises along the dashboard 65 after passing through the space between the floor panel 64 and the subframe 61. A part of the high-voltage line 63 is fixed to the dashboard 65 and connected to the motor M.
Japanese Patent Laid-Open No. 2004-9863

However, in the conventional arrangement structure of the high-voltage line 63, when the high-voltage line 63 is removed for maintenance or the like, the subframe 61 is first removed from the floor panel 64 and the space between the subframe 61 and the floor panel 64 is removed. Since it is necessary to remove the high-voltage line 63 from the dashboard 65 and the drive unit 62 after sufficiently securing the portion, there is a problem that man-hours for maintenance and the like increase, and the burden on the operator increases.
Further, since the sub-frame 61 and the floor panel 64 are arranged, in order to secure the arrangement space for the high-voltage line 63, the central portion of the floor panel 64 is expanded toward the vehicle interior. Therefore, it is necessary to form a center tunnel, and there is a problem of narrowing the interior space of the vehicle.
If it is attempted to change the routing route of the high-voltage line 63 so as to secure the vehicle interior space, it is necessary to take measures to prevent thermal damage from the exhaust pipe of the engine E, the shape of the subframe 61, There is a problem that the cost increases due to the necessity of changing the shape of the subframe 61.
Accordingly, the present invention provides a high-voltage line routing structure that can reduce the burden on the operator during maintenance and assembly while ensuring a vehicle interior space and can reduce costs.

In order to solve the above-mentioned problem, the invention described in claim 1 is directed to a motor (for example, the motor M in the embodiment) that is a driving source on the lower surface of a vehicle floor panel (for example, the floor panel 15 in the embodiment). In the arrangement structure of the high voltage line for arranging the high voltage line (for example, the high voltage line 5 in the embodiment), the vehicle drive unit (for example, the drive unit 2 in the embodiment) is arranged from the lower side of the floor panel. From the space between the subframe and the drive unit after the support member (for example, the subframe 9 in the embodiment) supporting the subframe (for example, the subframe 9 in the embodiment) wraps around the lower side. It is drawn out upward and connected to the motor.
With this configuration, the high-voltage line can be routed without forming a center tunnel, and can be assembled to the vehicle with the high-voltage line fixed to the drive unit.

The invention described in claim 2 is characterized in that, in the invention described in claim 1, the high-voltage line is configured to be separable.
With this configuration, it is possible to attach and detach the single high voltage line without removing the subframe.

The invention described in claim 3 is the invention described in claim 1 or 2, wherein the high-voltage line is configured to be movable.
With such a configuration, it is possible to release, for example, a force applied to a fixed portion of the high-voltage line due to vibration or the like during traveling of the vehicle, and it is possible to reduce the number of assembly steps of the drive unit.

According to a fourth aspect of the present invention, in the invention of the second or third aspect, the high-voltage line is fixed to the subframe and the floor panel, and each of the subframe and the floor panel is fixed. A cover (for example, the cover 24 in the embodiment) that covers the high-voltage line is provided between the sections in a detachable manner.
With this configuration, foreign matter such as pebbles can be prevented from directly colliding with the high-voltage line and being damaged while the vehicle is running, and the high-voltage line can be easily divided by removing the cover when the high-voltage line is attached or detached. can do.

  According to the first aspect of the present invention, the high voltage line can be routed without forming a center tunnel, and can be assembled to the vehicle with the high voltage line fixed to the drive unit. The vehicle interior space can be expanded and the assembly man-hours can be reduced.

  According to the second aspect of the present invention, in addition to the effect of the first aspect, since it becomes possible to attach and detach the single high-voltage line without removing the subframe, there is an effect that the burden on the operator can be reduced.

  According to the invention described in claim 3, in addition to the effect of claim 1 or 2, it is possible to release the force applied to the high-voltage line due to vibration or the like during traveling of the vehicle, and to reduce the assembly man-hour of the drive unit. Since it becomes possible to reduce, there exists an effect which can reduce the burden of an assembly operator, aiming at reduction of the burden of the said high voltage | pressure line.

  According to the invention described in claim 4, in addition to the effects of claim 2 or claim 3, while the vehicle is running, foreign matter such as pebbles and the like are prevented from directly colliding with the high voltage line and being damaged, and the high voltage line Since the high-voltage line can be easily divided by removing the cover at the time of attaching / detaching, there is an effect that the reliability and the merchantability can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiment, as in FIG. 6, a description will be given in a mode applied to a parallel hybrid vehicle. In this hybrid vehicle, the motor is sandwiched between an engine and a transmission, and the motor can be driven and assisted by the motor during acceleration, and the motor functions as a generator during deceleration to regenerate part of the deceleration energy by regenerative operation. Convert to energy and recover.

  In FIG. 1, reference numeral 1 denotes a 4-door sedan type parallel hybrid vehicle. At the front part of the parallel hybrid vehicle 1, there is disposed a drive unit 2 that is configured in a horizontal manner by sandwiching a three-phase motor M between a V-shaped engine E and a transmission T, and a rear seat of the vehicle body. A battery unit 3 is disposed behind (not shown). The drive unit 2 and the battery unit 3 are connected by a high-voltage line 5 including three cables 4 that are power lines of the motor M arranged from the front to the rear of the vehicle body. Further, a catalyst 7, a pre-muffler 8a, and a main muffler 8b are sequentially connected to the engine E of the drive unit 2 through the exhaust manifold 6 toward the rear of the vehicle body.

  FIG. 2 is a view showing the lower surface of the vehicle body. As shown in the figure, a subframe 9 for supporting the drive unit 2 is provided below the drive unit 2. The sub-frame 9 includes a left side member 10 and a right side member 11 that extend in the front-rear direction of the vehicle, and a cross member 12 that extends in the vehicle width direction. The transmission T of the drive unit 2 is supported on the left side member 10 via an engine mount (not shown), and the engine E of the drive unit 2 is supported on the right side member 11 via an engine mount. ing. Further, the left side member 10 and the right side member 11 are integrally formed via the cross member 12.

  As shown in FIGS. 2 and 3, the cross member 12 is formed in a so-called bowl shape that curves in a convex shape toward the top of the vehicle body. An exhaust manifold 6 and the high-voltage line 5 are arranged in a space below the cross member 12. A predetermined distance L is ensured between the high-pressure line 5 and the exhaust manifold 6 so that the high-pressure line 5 is not damaged by the exhaust manifold 6. The exhaust manifold 6 includes a first exhaust manifold 13 connected to a front cylinder block of a V-type engine E and a second exhaust manifold 14 connected to a rear cylinder block. E is connected in a space with E and merges into one exhaust manifold 6.

  A front portion of the lower surface of the floor panel 15 of the vehicle body bulges downward. The lower surface of the bulging portion 16 is formed above the lower surface of the cross member 12. Further, on both sides of the bulging portion 16, mounting seats 17, 17 for fixing the rear portions of the left and right side members 10, 11 are formed so as to protrude downward from the bulging portion 16. The rear portions of the left and right side members 10 and 11 are detachably attached to the mounting seats 17 and 17 by bolts (not shown).

  The high-voltage line 5 is covered with a front casing 18 and a rear casing 19 below the floor panel 15 and the subframe 9 of the vehicle body. The front casing 18 and the rear casing 19 are for preventing so-called fretting in which pebbles or the like collide with each other during traveling to break the cable 4. It is arranged offset on the left side. The three cables 4 constituting the high-voltage line 5 are juxtaposed in the vehicle width direction inside the front and rear casings 18 and 19.

  The high-voltage line 5 is routed from the battery unit 3 along the lower surface of the floor panel 15, passes below the bulging portion 16 and the cross member 12, and a space portion between the cross member 12 and the drive unit 2. Is drawn upward and connected to the motor M. Here, the size in the height direction is reduced by providing the cable 4 in the vehicle width direction.

The rear casing 19 is formed with a flange portion 20 facing the lower surface of the bulging portion 16. The rear casing 19 is attached to the floor panel 15 by fixing the flange portion 20 to the bulging portion 16 with bolts (not shown).
On the other hand, the front casing 18 is formed with a flange portion 21 that faces the cross member 12. The rear casing 19 is attached to the subframe 9 by fixing the flange portion 21 to the cross member 12 with bolts (not shown). Opposing openings 22 and 23 are arranged at fixed portions of the rear casing 19 and the front casing 18, respectively, and the periphery of the opening 22 of the rear casing 19 is gradually expanded downward toward the front of the vehicle body. Has been. That is, the peripheral edge of the opening 22 expands downward, and the above-described positional deviation between the lower surface of the floor panel 15 and the lower surface of the cross member 12 is complemented, whereby the cable between the opening 22 and the opening 23 is provided. 4 and a cover 24 (to be described later) are kept horizontal.

Between the flange part 20 and the flange part 21, a section where the high-voltage line 5 is not covered with the front casing 18 and the rear casing 19 is provided, and a cover 24 is attached to this section. The cover 24 is formed in a U-shaped cross section, and the space formed by the lower wall 25 and the side wall 26 is formed wider than the space inside the front casing 18 and the rear casing 19, A predetermined clearance is set between the cable 4 and the cable 4.
Further, the cable 4 in the section covered with the cover 24 is formed to be movable, and further, as shown in FIG. 3, it can be attached / detached, that is, can be divided by a connector portion 27 accommodated inside the opening 22 of the rear casing 19. It has become.

  Similar to the front casing 18 and the rear casing 19, the cover 24 prevents fretting of the divided portions of the cables 4, and the front casing 18 and the rear casing 19 described above are disposed offset. Accordingly, it is formed in an arc shape corresponding to the bending of the high-voltage line 5. The rear portion of the cover 24 is inserted inside the opening 22 of the rear casing 19, and is fixed to the base member 28 disposed above the cable 4 with a screw 29 so as to be detachable.

  As shown in FIG. 4, one end of the base member 28 is fixed to the upper edge of the opening 23 of the front casing 18 described above, and the other end is inserted into the opening 22. The opening 22 of the rear casing 19 has a so-called labyrinth structure formed so as to cover the cover 24. That is, the cover 24 is covered with the opening 22 of the rear casing 19, thereby preventing water and dust from entering.

  The front casing 18 is formed horizontally from the cover 24 toward the front of the vehicle body, and is further formed to the front position of the cross member 12 so as to wrap around from the front of the lower surface of the cross member 12 upward. The high-voltage line 5 arranged on the motor M side, that is, above the front casing 18 is fixed to the upper wall of the cross member 12 via the cable support 30 and then connected to the motor M described above. For convenience of illustration, the high-voltage line 5 behind the vehicle body from the cover 24 is omitted.

Next, the procedure for assembling the drive unit 2 to the vehicle body will be described with reference to FIGS. 5a and 5b.
As shown in FIG. 5 a, first, the drive unit 2 is mounted on the subframe 9. Then, one end of the high-voltage line 5 is drawn upward from between the drive unit 2 and the cross member 12 of the subframe 9 to be connected to the motor M. A front casing 18 is attached to the high-voltage line 5, and the front casing 18 is fixed to the subframe 9. Further, in a state in which the cover 24 is not attached, the rear casing 19 is attached to the high-voltage line 5, and the movable portion of the cable 4 covered by the cover 24 is bent upward to stand the rear casing 19. Set it up. And it preserve | saved until the assembly | attachment process of the drive unit 2 in this state.

Next, immediately before the assembly process of the drive unit 2, the high-voltage line 5 covered with the rear casing 19 is tilted in the direction shown by the arrow in FIG. 5 to the state shown in FIG. 5b. Then, the drive unit 2 and the high-voltage line 5 mounted on the subframe 9 are set below the vehicle body and lifted upward to fix the subframe 9 and the rear casing 19 to the floor panel 15. Finally, the other end of the high voltage line 5 is connected to the battery unit 3, the cover 24 is attached, and the assembly operation of the drive unit 2 is completed.
On the other hand, at the time of maintenance of the high-voltage line 5, after removing the cover 24, the high-voltage line 5 is divided from the connector portion 27 described above, and the rear casing 19 and the front casing 18 are respectively connected to the rear portion and the front portion of the high-voltage line 5. And remove individually.

Therefore, according to the above-described embodiment, the high-voltage line 5 can be routed without forming a center tunnel in the floor panel 15, and the high-voltage line 5 is fixed to the drive unit 2 to the vehicle body. Since it can be assembled, the interior space of the vehicle can be expanded and the number of assembly steps of the drive unit 2 can be reduced.
Moreover, since it becomes possible to attach and detach the high-voltage line 5 alone without removing the subframe 9, the burden on the operator can be reduced.

Further, the force applied to the high-voltage line 5 due to vibrations during traveling of the vehicle can be released and the number of assembling steps of the drive unit 2 can be reduced, so that the burden on the high-voltage line 5 is reduced. However, it is possible to reduce the burden on the assembly operator.
Further, it is possible to prevent foreign matter such as pebbles from directly colliding with the high-voltage line 5 during traveling of the vehicle and damage the high-voltage line 5, and the case 24 can be easily removed when the high-voltage line 5 is attached or detached. , Improvement in reliability and merchantability can be achieved.

  Further, since the periphery of the opening 22 expands downward to compensate for the positional deviation between the lower surface of the floor panel 15 and the lower surface of the cross member 12, the cable 4 is horizontal between the opening 22 and the opening 23. As a result, the attaching / detaching operation of the cover 24 and the dividing operation of the high voltage line are facilitated, and the burden on the operator is further reduced. In the assembling work, the rear casing 19 can be raised and stored until just before the drive unit 2 is assembled to the vehicle body, which advantageously reduces the occupied space when the drive unit 2 is stored.

  The present invention is not limited to the above-described embodiment, and it is sufficient that a motor is disposed at the front portion of the vehicle body and a battery unit is disposed at the rear portion of the vehicle body. good. Furthermore, the shape of the cover only needs to be able to cover the high-voltage line, and may be appropriately selected according to the location of the high-voltage line.

It is a perspective view of the arrangement structure of the high voltage | pressure line of the parallel hybrid vehicle in embodiment of this invention. It is the arrow line view seen from the A direction of FIG. 1 in embodiment of this invention. It is a disassembled perspective view of the high voltage | pressure wire in embodiment of this invention. It is a fragmentary sectional view which follows the BB line of FIG. 1 in embodiment of this invention. It is explanatory drawing of the assembly | attachment process of the drive unit in embodiment of this invention. It is explanatory drawing corresponded in FIG. 5 in the conventional high-voltage line arrangement structure.

Explanation of symbols

M Motor 2 Drive unit 5 High voltage line 9 Subframe 12 Cross member 15 Floor panel 24 Cover

Claims (4)

  In the arrangement structure of a high voltage line that arranges a high voltage line of a motor as a drive source on the lower surface of the floor panel of the vehicle, the high voltage line is arranged below the floor panel and below the cross member of the subframe that supports the drive unit of the vehicle. A wiring structure for a high-voltage line, wherein the wiring structure is drawn upward from a space between the subframe and the drive unit and connected to the motor after being wound around.   The high-voltage line routing structure according to claim 1, wherein the high-voltage line is configured to be separable.   The high-voltage line routing structure according to claim 1 or 2, wherein the high-voltage line is configured to be movable. The high-voltage line is fixed to the sub-frame and the floor panel, and a cover for covering the high-voltage line is detachably provided between the fixed portions of the sub-frame and the floor panel. The arrangement structure of the high voltage | pressure line of Claim 2 or Claim 3.

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