JP6609978B2 - Wiring fixing structure of vehicle - Google Patents

Description

  The present invention relates to a wiring fixing structure for a vehicle.

  A vehicle including an electric motor as an electric drive source includes an electric motor and an inverter. The electric motor and the inverter are connected by wiring capable of transmitting a high voltage (for example, 200V), and are mounted and arranged in a space formed in the front part of the vehicle separated from the vehicle interior by a dash panel. (For example, Patent Document 1).

Japanese Patent No. 529431

When the dash panel and the wiring are placed facing each other due to the vehicle layout, when the electric motor or inverter moves toward the rear of the vehicle due to a collision load from the front of the vehicle, the wiring interferes with the dash panel and collapses. It is assumed that For this reason, a new fixing structure for wiring is required.
An object of the present invention is to provide a new fixing structure for wiring of a vehicle.

In order to achieve the above object, a wiring fixing structure for a vehicle according to the present invention connects an electric drive source that drives the vehicle, an inverter that controls the electric drive source, an electric drive source and the inverter, Wiring that protrudes rearward from the vehicle rear surface of each inverter , a dash panel that faces the wiring on the vehicle rear side of the wiring, and a recess that is formed in the lower portion of the dash panel and that is recessed with a width in the vehicle width direction And a support bracket having one end side connected to the rear end side of the electric drive source and the other end side connected to the vehicle body constituting part arranged to face the recess and having a wiring fixing part for fixing the wiring. the provided, the electric drive source and the recess have been arranged offset in the vehicle width direction, connecting portions of the electric drive source in one end side of the support bracket, off the recess closer to the electric drive source Tsu is bets, and be formed shifted in the offset direction of the electric driving source relative to the other end of the center line of the support bracket, break position of one end side of the support bracket, the front side of the wiring fixing part It is characterized that you have been with.

  According to the present invention, the electric drive source is arranged to be offset in the vehicle width direction with respect to the recess, and the connecting portion with the electric drive source on one end side of the support bracket is at the center line on the other end side of the support bracket. In contrast, when the electric drive source moves toward the rear of the vehicle in response to a collision load from the front of the vehicle with the dash panel and the wiring facing each other because the electric drive source is formed to be shifted to the offset direction side However, since the wiring enters the recess of the dash panel, it is possible to prevent the wiring from being crushed due to interference with the dash panel.

The perspective view which shows schematic structure of the vehicle front part to which the wiring fixing structure of the vehicle which concerns on this invention was applied. The figure which looked at the vehicle front part to which the wiring fixing structure of vehicles concerning the present invention was applied from the vehicles lower part side. The figure which looked at the vehicle front part to which the wiring fixing structure of vehicles concerning the present invention was applied from the vehicle side. It is a figure explaining the structure of the support bracket which connects an electric drive source and a vehicle body structure part, (a) is the perspective view seen from the wiring fixing | fixed part side, (b) is the perspective view seen from the connection surface side with a motor. Figure. It is a figure explaining the structure of a support bracket, (a) is an enlarged view seen from the vehicle lower surface side, (b) is a side view seen from the wiring fixing | fixed part side. It is a figure explaining the effect | action of the wiring fixing structure of a vehicle, (a) is a schematic diagram which shows the state when a collision load is added from the vehicle front, (b) is a schematic diagram which shows a state when a support bracket fractures | ruptures (C) is a schematic diagram which shows the state in which the high voltage wiring entered the recessed part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the embodiments, the same members and members having the same functions are denoted by the same reference numerals, and repeated description will be omitted as appropriate. In the drawings, the structural requirements may be partially omitted for ease of viewing.
FIG. 1 is an enlarged view of the skeleton portion and main configuration of the front portion 1A of the vehicle 1. A space 2 for mounting a drive system is formed in the front portion 1 </ b> A of the vehicle 1. The space 2 is located in the vehicle width direction W and is connected to the left and right front side members 3 and 4 extending in the vehicle front-rear direction Y, and the front side members 3 and 4, and a dash that separates the vehicle interior from the space 2. Surrounded by panel 5. In this space 2, an electric motor 6, a transaxle 7 and an inverter 8 as an electric drive source constituting a drive system are mainly housed and mounted. The dash panel 5 is disposed on the vehicle rear Y2 side with respect to the electric motor 6. The electric motor 6 and the inverter 8 arranged above the electric motor 6 are electrically connected by a high voltage wiring 20 as a wiring on the dash panel 5 side (vehicle rear Y2 side). The high voltage wiring 20 and the dash panel 5 are in a positional relationship facing each other.
That is, as shown in FIGS. 1 and 2, the high voltage wiring 20 connects the electric motor 6 and the inverter 8, and protrudes rearward from the vehicle rear side surfaces 6 c and 8 A of the electric motor 20 and the inverter 8. . The dash panel 5 faces the high voltage wiring 20 on the vehicle rear Y2 side of the high voltage wiring 20.
Below the front side members 3, 4, as shown by a two-dot chain line in FIG. 2, a planar shape is an X shape, and a suspension cross member 9 serving as a vehicle body constituting portion is disposed. The front portions 9A and 9B of the bifurcated suspension cross member 9 are fixed to the front portions 3A and 4A of the front side members 3 and 4, respectively. The rear portions 9C and 9D of the bifurcated suspension cross member 9 are fixed to the front side members 3 and 4 on the vehicle rear Y2 side with respect to the front portions 3A and 4A of the front side members 3 and 4, respectively. In the space 2, the front member 10 is disposed so that both ends 10 </ b> A and 10 </ b> B are fixed to the front portions 9 </ b> A and 9 </ b> B of the suspension cross member 9 and extend in the vehicle width direction W.

  As shown in FIG. 1, a concave portion 50 having a width in the vehicle width direction W and recessed from the vehicle upper side Z toward the vehicle rear side Y2 is formed in the lower portion 5A at the center of the dash panel 5 in the vehicle width direction W. Has been. The recess 50 communicates with the floor tunnel 13 extending in the vehicle front-rear direction Y at the lower portion of the vehicle 1. In the present embodiment, the recess 50 constitutes the front portion of the floor tunnel 13, but may be configured not to communicate with the floor tunnel 13. In other words, the recess 50 may be communicated with the floor tunnel 13 in the case of the vehicle 1 having the floor tunnel 13, and the width in the vehicle width direction W in the lower portion 5 </ b> A of the dash panel 5 if the vehicle does not have the floor tunnel 13. And a space that is recessed from the vehicle upper Z toward the vehicle rear Y2 side. The recess 50 functions as a safety space for accommodating the high-voltage wiring 20 when a collision load F (see FIG. 6) is applied from the front Y1 of the vehicle.

The electric motor 6 and the transaxle 7 are integrated by joining the opposing side surfaces. As shown in FIG. 2, the electric motor 6 is arranged offset in the vehicle width direction W with respect to the recess 50 (floor tunnel 13). In other words, the electric motor 6 is disposed so as to be offset toward one front side member with respect to the center Q1 in the vehicle width direction W (referred to as the center of the recess) with respect to the recess 50 (floor tunnel 13). In the present embodiment, the electric motor 6 is disposed so as to be offset toward the front side member 4 indicated by the arrow W2 with respect to the recess center Q1. In the present embodiment, W2 is the offset direction of the electric motor 6. The front side 6A of the electric motor 6 and the front part 7A of the transaxle 7 are connected and fixed to the front member 10 with bolts 30 and 31 via rubber bushes or the like, respectively. A rear side (hereinafter referred to as “motor rear side”) 6 </ b> B of the electric motor 6 is fixed to a vehicle body fixing portion 12 fixed to the suspension cross member 9 via a support bracket 11.
As shown in FIG. 3, the high voltage wiring 20 is arranged so as to face the dash panel 5 because of the layout of the vehicle 1. The high voltage wiring 20 is arranged so as to have a bending that protrudes toward the dash panel 5 and curves so as not to be stretched by vibration during traveling.
In this way, when the electric motor 6 is offset in the vehicle width direction W with respect to the recess 50 (floor tunnel 13), and the high voltage wiring 20 is disposed to face the dash panel 5, the collision load F from the vehicle front Y1. In response, for example, when the electric motor 6 moves toward the vehicle rear Y2, it is assumed that the high voltage wiring 20 is retracted as it is and interferes with the dash panel 5 and is crushed. That is, it is assumed that the high voltage wiring 20 is sandwiched between the electric motor 6 and the dash panel 5.

  Therefore, in the present embodiment, as shown in FIG. 2, a curved high voltage is applied to the support bracket 11 having one end 11 </ b> A connected to the motor rear portion 6 </ b> B and the other end 11 </ b> B connected to the vehicle body fixing portion 12. A part of the wiring 20 is fixed. As shown in FIG. 2, the support bracket 11 is formed such that the connecting surface Q2 as a connecting portion with the electric motor 6 on one end side 11A is shifted to the offset direction W2 side of the electric motor 6 with respect to the other end side 11B. ing. The support bracket 11 has a wiring fixing portion 21 that fixes the high-voltage wiring 20. The connecting surface Q2 on one end side 11A of the support bracket 11 is formed so as to be shifted toward the offset direction W2 side of the electric motor 6 with respect to the center line Q3 on the other end side 11B of the support bracket 11. The center line Q3 on the other end side 11B is formed so as to be shifted in the offset direction W2 of the electric motor 6 with respect to the recess center Q1 of the recess 50 (floor tunnel 13). For this reason, the other end side 11 </ b> B of the support bracket 11 is shifted to the offset direction W <b> 2 side of the electric motor 6 in the recess 50 and is connected to the suspension cross member 9.

Next, the configuration of the support bracket 11 will be described mainly with reference to FIGS. 3, 4 (a), 4 (b), 5 (a), and 5 (b). 4A is a perspective view of the support bracket 11 as viewed from the wiring fixing portion 21 side. FIG. 4B is a perspective view of the support bracket 11 as viewed from the connection surface Q2 side with the electric motor 6. FIG. FIG. 5A is an enlarged view of the support bracket 11 viewed from the vehicle lower surface side, and FIG. 5B is a side view of the support bracket 11 viewed from the wiring fixing portion 21 side.
As shown in FIGS. 4A and 4B, one end side 11A of a metal support bracket 11 made of aluminum alloy or the like includes a plurality of cylindrical boss portions fixed to the motor rear side 6B. Motor fixing portions 111, 112, and 113 are formed as a plurality of fixing portions. Rubber bushes 151, 152, and 153 are attached to the motor fixing portions 111, 112, and 113, respectively. As shown in FIGS. 5 (a) and 5 (b), the one end side 11A of the bracket 11 is inserted with bolts 32 from the wiring fixing portion 21 side to the motor fixing portions 111, 112, and 113, respectively, and the motor rear portion side 6B. Are fastened and fixed to the motor rear side 6B.
As shown in FIGS. 4A and 4B, the motor fixing portions 111, 112, and 113 are arranged and formed to have a triangular shape with the motor fixing portion 111 as a vertex. The other end side 11B located diagonally to the motor fixing part 111 is bifurcated so that the cylindrical fixing boss parts 114, 115 are on the same axis line with the opposing parts 11Ba, 11Bb facing each other. Is formed. A cylindrical rubber mount 14 of the vehicle body fixing portion 12 is interposed between the facing portion 11Ba and the facing portion 11Bb as shown in FIGS. The other end side 11B of the bracket 11 is fastened and fixed to the vehicle body fixing part 12 as shown in FIG. 3 by inserting the bolt 33 from the fixing boss part 114 toward the fixing boss part 115 and fastening with the nut 34. In the present embodiment, the center line Q3 on the other end side 11B of the support bracket is a center line between the middle facing portion 11Ba and the facing portion 11Bb in the vehicle width direction W.

As shown in FIGS. 4A and 4B, the motor fixing portion 111 and the motor fixing portion 112 are connected to each other at the side portion 11C, and the motor fixing portion 113 and the motor fixing portions 114 and 115 located on the opposite side are located. Are connected to each other at the side 11D. The motor fixing part 112 and the motor fixing parts 114 and 115 are connected to each other by the side part 11E, and the motor fixing part 111 and the motor fixing part 113 are connected to each other by the side part 11F. When the side portion 11C is an upper side, the side portion 11D is a lower side, and the side portion 11E and the side portion 11F are oblique sides, the side surface of the support bracket 11 is formed in a trapezoidal shape.
The wiring fixing portion 21 to which the high voltage wiring 20 is attached is a cylindrical boss portion, and as shown in FIGS. 4 (a) and 5 (b), the motor is more fixed than the motor fixing portions 112 and 113 in a side view. It is located near the fixing portions 114 and 115 (the other end side 11B). A rubber bush 154 is attached to the wiring fixing portion 21. The wiring fixing portion 21 is located on a straight line E connecting the center of the motor fixing portion 111 and the center of the motor fixing portion 114 (115), and protrudes from the side portions 11C to 11F toward the side opposite to the coupling surface Q2. It is formed as follows. That is, the wiring fixing portion 21 is provided on the support bracket 11 so as to bulge in a convex shape from the side surface 11G on the side opposite to the connection surface Q2 of the one end side 11A of the support bracket 11 to the electric motor 6 toward the high voltage wiring 20. It has been. For this reason, as shown in FIG. 5A, the support bracket 11 has a bent shape with the wiring fixing portion 21 as the apex when viewed from below. Since the support bracket 11 is fixed to the motor rear side 6B with a plurality of bolts 32, when the collision load F is received from the front Y1 of the vehicle body, the support bracket 11 is broken at a position closer to the vehicle rear Y2 than the fixed portion to the motor rear side 6B. It is formed to do. That is, it is formed so as to be broken from an alternate long and short dash line indicated by reference numeral G in FIG.

  As shown in FIG. 5 (a), the width Wa in the vehicle width direction W of the side portions 11C and 11F located on the one end side 11A is the vehicle width between the facing portions 11Ba and 11Bb of the other end 11B on the vehicle body mounting side. It is formed narrower than the width Wb in the direction W. The wiring fixing portion 21 is located on the dash panel 5 side (vehicle rear Y2 side) from the motor rear side 6B when the motor fixing portions 111, 112, and 113 are fastened and fixed to the motor rear side 6B by bolts 32, respectively. Is arranged. As shown in FIG. 2, the high voltage wiring 20 is joined to the wiring fixing portion 21 from the side (the end face side of the wiring fixing portion 21) with a clip 25 attached to the high voltage wiring 20 with a fastening member or the like. It is fixed by fastening.

  As shown in FIG. 4A, FIG. 4B, and FIG. 5B, a plurality of ribs 141, 142, 143, and 144 extending radially are formed from the wiring fixing portion 21 that is a boss portion. Yes. The rib 141 connects the wiring fixing part 21 and the motor fixing part 111 to each other, and the rib 142 connects the wiring fixing part 21 and the motor fixing part 112 to each other. The rib 143 connects the wiring fixing portion 21 and the motor fixing portion 113 to each other, and the rib 144 connects the wall portion 145 and the wiring fixing portion 21 that connect the side portion 11D and the side portion 11E to each other on the other end side 11B. doing. The wiring fixing portion 21 is supported from the four different directions by the plurality of ribs 141 to 144 and is disposed closer to the dash panel 5 side (vehicle rear end side Y2) than the motor fixing portion 112 and the motor fixing portion 113. .

The operation when the collision load F is applied to the vehicle 1 having the high voltage wiring fixing structure having such a configuration from the front Y1 of the vehicle will be described with reference to FIGS. 6 (a) to 6 (c).
The motor fixing portions 111 to 113 are rigid because they are fastened and fixed by bolts 32. For this reason, one end side 11A of the support bracket 11 is integrated with the motor rear portion side 6B after being fastened.
As shown in FIG. 6A, when a collision load F is applied to the electric motor 6, the electric motor 6 moves backward. When the electric motor 6 retreats in this way, the support bracket 11 receives a reaction force from the vehicle body fixing portion 12 side provided on the suspension cross member 9 to the other end side 11B. At this time, since the connecting surface Q2 is displaced in the offset direction W2 (left side) with respect to the fixed center Q3 on the other end side 11B, the reaction force from the vehicle body fixing portion 12 is applied to the right side from the connecting surface Q2 of the support bracket 11. . Further, the support bracket 11 is formed so that the width Wa on the one end 11 side A is narrower than the width Wb on the other end side 11B, and the wiring fixing portion 21 is formed to protrude in the offset direction W2 (left side) with respect to each side portion. Has been. For this reason, when the collision load F is applied, the ribs 142 and 143 around the wiring fixing portion 21 are broken at the dashed line G in FIG. 5B, and the support bracket 11 is moved to the motor as shown in FIG. 6B. It is destroyed from the one end 11 side fixed to the rear side 6B.
As shown in FIG. 6C, the destroyed support bracket 11 moves obliquely rearward toward the concave portion 50 positioned on the right side in the drawing from the fixed center Q3 while being lowered to the vehicle rear Y2. As the support bracket 11 moves, the high voltage wiring 20 attached to the wiring fixing portion 21 remaining on the side of the support bracket 11 that is broken at the one end side 11A is also moved toward the recess 50 or the floor tunnel 13. And fit. For this reason, the high voltage wiring 20 can be prevented from being damaged by being sandwiched between the dash panel 5 and the motor rear side 6B.
In other words, in the present embodiment, the electric motor 6 is disposed offset in the vehicle width direction W with respect to the recess 50, and the connecting surface Q2 serving as a connecting portion with the electric motor 6 on the one end side 11A of the support bracket 11 is provided. The support bracket 11 is formed so as to be shifted toward the offset direction W2 side of the electric motor 6 with respect to the center line Q3 on the other end side 11B. For this reason, even when the dash panel 5 and the high voltage wiring 20 face each other and the electric motor 6 moves toward the vehicle rear Y2 due to the collision load F from the front of the vehicle, the high voltage wiring 20 is connected to the dash panel. 5, the high voltage wiring 20 can be prevented from being crushed due to interference with the dash panel 5.
Since the other end side 11B of the support bracket 11 is shifted to the offset direction W2 side of the electric motor 6 with respect to the recess 50, a space is provided correspondingly, as shown in FIGS. 6 (b) and 6 (c). In addition, when a reaction force is applied to the collision load F from the front of the vehicle, a space necessary for the movement of the other end side 11B of the support bracket 11 is secured, and the high-voltage wiring 20 is accommodated (moved) in the recess 50. ) Can be promoted.
The fixed boss portions 114 and 115 formed on the other end side 11 </ b> B are connected to the wiring fixing portion 21 and the rib 144 via the wall portion 145. For this reason, the collision load F can be distributed to the fixed boss portions 114 and 115 by being distributed by the ribs. Thereby, the wiring fixing portion 21 is not easily damaged, and the high-voltage wiring 20 can be moved toward the concave portion 50 together with the broken support bracket 11 more reliably.
A portion where the load due to the collision load F from the vehicle front Y1 is large, that is, the wiring fixing portion 21 is connected to the high voltage wiring 20 from the side surface 11G opposite to the connection surface Q2 with the electric motor 6 on one end side 11A of the support bracket 11. Since it is provided so as to bulge toward the surface, such a load is easily relieved, and damage to the support bracket 11 can be suppressed.

As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to this specific embodiment, Unless it is specifically limited by the above-mentioned description, this invention described in the claim is described. Various modifications and changes are possible within the scope of the gist of the invention. For example, the material of the support bracket 11 is not limited to an aluminum alloy, and may be steel. In the present embodiment, the offset direction of the electric motor 6 with respect to the recess center Q1 is the right direction of the vehicle 1 indicated by the arrow W2, but the offset direction with respect to the recess center Q1 of the electric motor 6 is indicated by the arrow W1 because of the layout. The left direction of the vehicle 1 may be set. In this case, the offset direction of the fixed center Q3 and the connecting surface Q2 is also set to the arrow W1, so that when the collision load F is applied from the front of the vehicle, the support bracket 11 moves to the left side of the vehicle indicated by the arrow W2 and the high voltage Accordingly, the wiring 20 is also housed in the recess 50. The vehicle body constituent part for fixing the vehicle body fixing part 12 is not limited to the suspension member 9, and may be another vehicle body constituent part. In the present embodiment, the one end side 11A of the support bracket 11 has been described as being connected to the motor rear side 6B. However, the connection location of the one end side 11A is not limited to the motor rear side 6B. You may make it connect with other site | parts, such as the center part of 6. FIG.
The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 1A ... Front part, 2 ... Space, 3, 4 ... Front side member, 5 ... Dash panel, 5A ... Lower part of dash panel, 6 ... Electricity Drive source, 6C: vehicle rear side surface of electric drive source, 7 ... transaxle, 8 ... inverter, 8A ... vehicle rear side surface of inverter, 9 ... vehicle body component (suspension member) , 11 ... support bracket, 11A ... one end side, 11B ... the other end side, 11G ... side surface of the support bracket, 20 ... wiring, 21 ... wiring fixing part, 50 ... Concave part, 111-113 ... Plural boss parts (plural fixing parts), 141-144 ... Plural ribs, Q1 ... Center of concave part, Q2 ... Connection part with electric drive source, Q3 ... the center of the other end of the support bracket, Y ... the vehicle longitudinal direction, ... vehicle width direction, W2 ··· offset direction

Claims (4)

An electric drive source for driving the vehicle;
An inverter for controlling the electric drive source;
A wiring that connects the electric drive source and the inverter and protrudes rearward from the vehicle rear surface of each of the electric drive source and the inverter;
A dash panel facing the wiring on the vehicle rear side of the wiring;
A recess formed at the bottom of the dash panel and recessed in the vehicle width direction; and
A support having one end side connected to the rear end side of the electric drive source and the other end side connected to the vehicle body constituting part arranged to face the recess and fixing the wiring. A bracket, and
The electric drive source and the recess are arranged offset in the vehicle width direction,
A connection portion with the electric drive source on one end side of the support bracket is offset toward the recess with respect to the electric drive source, and the electric drive source has a center line on the other end side of the support bracket. It is formed to shift to the offset direction side ,
Wire fixing structure of the vehicle the breaking position of the one end side of the support bracket, characterized that you have been the front side of the wiring fixing part.   2. The wiring fixing structure for a vehicle according to claim 1, wherein the other end side of the support bracket is connected to the vehicle body component in the recess in the offset direction side of the electric drive source.   One end side of the support bracket is formed with a plurality of fixing portions including a plurality of boss portions fixed to the electric drive source, and the wiring fixing portion includes the plurality of fixing portions and the other end side. The vehicle wiring fixing structure according to claim 1, wherein the vehicle wiring fixing structure is connected to each other by a plurality of ribs.   The wiring fixing portion is provided so as to bulge in a convex shape toward the wiring from a side surface opposite to a connection portion with the electric drive source on one end side of the support bracket. 4. The vehicle wiring fixing structure according to any one of 1 to 3.

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