JP5396907B2 - In-vehicle motor cable routing structure - Google Patents

Description

  The present invention relates to an in-vehicle motor cable routing structure, and in particular, an electric motor disposed under a vehicle body spring, and a power supply unit disposed on the body spring and supplying power to the electric motor. The present invention relates to a wiring structure for an in-vehicle motor cable including a power cable to be electrically connected.

  2. Description of the Related Art Conventionally, there has been known an in-vehicle motor cable routing structure that includes an electrical wiring that electrically connects an electric motor that drives a wheel and a power supply unit (see, for example, Patent Document 1). In this routing structure, the electrical wiring forms a spiral portion having a central axis extending in the substantially vertical direction of the vehicle body between the electric motor and the vehicle body, and is supported by a link between the vehicle body and the axle. According to such a routing structure, when the wheel is displaced with respect to the vehicle body, the displacement is absorbed by the spiral portion of the electric wiring, so that interference with peripheral parts of the electric wiring and the road surface can be prevented.

JP 2001-301472 A

  By the way, if the electric wiring between the electric motor and the power supply unit on the vehicle body side is formed in a spiral shape as described above, the number of bent portions of the electric wiring increases, so that the relative displacement between the wheel and the vehicle body is increased. A large stress can act on the electrical wiring. In this respect, it is desirable that the electrical wiring is a flexible cable with a relatively small diameter that can be easily deformed. However, since a small-diameter cable is a cable with a large conductor resistance, if the entire wiring between the electric motor and the power supply unit is a small-diameter cable, an electrical loss is excessive when driving the electric motor. End up.

  The present invention has been made in view of the above-described points, and is for an in-vehicle motor capable of ensuring deformability while reducing an electrical loss of a power cable between the electric motor and a power supply unit. The object is to provide a cable routing structure.

An object of the present invention is to provide an in-vehicle motor provided with a power cable for electrically connecting an electric motor disposed under the body spring and a power supply section disposed on the body spring and supplying power to the electric motor. Cable arrangement structure, wherein the power cable is relayed by a relay stand attached to a stabilizer bracket that supports the stabilizer on the vehicle body side, and routed between the power supply unit and the relay stand A vehicle-mounted motor having a large-diameter cable having a relatively large diameter and a small-diameter cable having a relatively small diameter that is electrically connected to the large-diameter cable and routed between the relay stand and the electric motor. Achieved by cable routing structure.

  In the invention of this aspect, the power cable between the electric motor and the power supply unit is a large-diameter cable having a relatively large diameter that is routed from the power supply unit to the vicinity of the connection portion between the vehicle body and the wheel, A small-diameter cable having a relatively small diameter that is electrically connected to the cable and routed from the vicinity of the connection portion to the electric motor. Since the large-diameter power cable has a lower conductor resistance than the small-diameter power cable, electrical loss is reduced. Further, since the small-diameter power cable is a cable having a smaller diameter than that of the large-diameter power cable, the deformation is easy. Therefore, according to the present invention, the fixed portion from the power supply portion to the vicinity of the connection portion uses a large-diameter power cable, so that it is possible to reduce electrical loss and from the vicinity of the connection portion to the electric motor. Since the movable part uses a small-diameter power cable, the ease of deformation can be ensured.

  In the invention of this aspect, the large-diameter cable is routed from the power supply unit to the stabilizer bracket, and the small-diameter cable is routed from the stabilizer bracket to the electric motor. Therefore, according to the present invention, since a large-diameter cable is used from the power supply unit to the stabilizer bracket, electrical loss can be reduced, and a small-diameter cable is used from the stabilizer bracket to the electric motor. Therefore, ease of deformation can be ensured.

Further, in the above-described vehicle motor cable routing structure, the power cable crosses the stabilizer above or below the stabilizer bush, and the large-diameter cable extends from the power supply unit to the relay stand near the stabilizer bush. The small diameter cable may be routed from the relay stand near the stabilizer bush to the electric motor.

  In the invention of this aspect, the large diameter cable is routed from the power supply unit to the vicinity of the stabilizer bush, and the small diameter cable is routed from the vicinity of the stabilizer bush to the electric motor. Therefore, according to the present invention, a large-diameter cable is used from the power supply unit to the vicinity of the stabilizer bush, so that electrical loss can be reduced, and a small-diameter cable is used from the vicinity of the stabilizer bush to the electric motor. Therefore, ease of deformation can be ensured.

Further, in the above-described vehicle motor cable arrangement structure, the small-diameter cable may be curved outside the swing range of the stabilizer between the relay stand and the electric motor.

  In the invention of this aspect, the small-diameter cable is curved outside the swing range of the stabilizer. For this reason, even when the wheel and the vehicle body are relatively displaced, it is possible to prevent the small-diameter cable between the vicinity of the connecting portion and the electric motor from interfering with peripheral components and the road surface.

  ADVANTAGE OF THE INVENTION According to this invention, a deformation | transformation ease can be ensured, reducing the electrical loss of the power cable between an electric motor and a power supply part.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of a vehicle on which an in-vehicle motor cable routing structure according to an embodiment of the present invention is mounted. It is a top view of the vehicle carrying the wiring structure of the cable for vehicle-mounted motors of a present Example. It is a perspective view of the vehicle carrying the wiring structure of the cable for vehicle-mounted motors of a present Example. It is a perspective view of the vehicle carrying the wiring structure of the cable for vehicle-mounted motors of a present Example. It is a side view of the vehicle carrying the wiring structure of the cable for vehicle-mounted motors of a present Example.

  Hereinafter, specific embodiments of a cable routing structure for a vehicle-mounted motor cable according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a configuration diagram of a vehicle equipped with a cable routing structure for an in-vehicle motor according to an embodiment of the present invention. FIG. 2 is a plan view of a vehicle on which the vehicle-mounted motor cable routing structure of this embodiment is mounted. 3 and 4 are perspective views of a vehicle on which the vehicle-mounted motor cable routing structure of this embodiment is mounted. FIG. 3 shows a suspension shock absorber, and FIG. 4 shows a suspension shock absorber not shown. Further, in both FIGS. 3 and 4, the side members constituting the vehicle body are not described. FIG. 5 shows a side view of a vehicle on which the vehicle-mounted motor cable routing structure of this embodiment is mounted. In addition, in FIG. 5, the side view at the time of seeing the vehicle outer side from the vehicle inner side is shown.

  In this embodiment, the vehicle 10 includes a vehicle body 12 as a body spring and a wheel 14 as a body spring. Each wheel 14 is suspended from the vehicle body 12 via a suspension 16. The vehicle 10 also includes a stabilizer 20. The stabilizer 20 has a function of suppressing the vehicle body roll by coupling the left and right suspensions 16 of the vehicle body. The stabilizer 20 is rotatably supported on the vehicle body 12 side via a stabilizer bush 22. The stabilizer bush 22 is attached to a stabilizer bracket 26 fixed to a side member 24 constituting the vehicle body 12, and is provided on each of the left and right sides of the vehicle body.

  The stabilizer 20 includes a stabilizer bar 30 that extends in the left-right direction of the vehicle body and a stabilizer link 32 that extends in the vertical direction of the vehicle body. The stabilizer bar 30 is a member that is supported by the vehicle body 12 via a stabilizer bracket 26 on each of the left and right sides of the vehicle body, and that can rotate around the stabilizer bush 22. The stabilizer bar 30 intersects the side member 24 below the side member 24, and the stabilizer bush 22 is positioned below the side member 24. A predetermined gap is formed between the stabilizer bush 22 and the side member 24. The stabilizer bar 30 is formed in a U-shape when viewed from above, and is formed in a substantially linear shape between the two stabilizer bushes 22 on the left and right sides of the vehicle body, and is curved on the outside of the vehicle body from the stabilizer bushes 22.

  The stabilizer link 32 is a member that couples the stabilizer bar 30 and the lower arm 34 that constitutes the suspension 16, and is provided on each of the left and right sides of the vehicle body. The stabilizer 20 suppresses the body roll by causing the stabilizer bar 30 to twist left and right when the body roll is generated. The stabilizer bar 30 can rotate between the two stabilizer bushes 22 on the left and right sides of the vehicle body. During this rotation, both ends of the stabilizer bar 30 and the stabilizer link 32 swing around the stabilizer bush 22. .

  The vehicle also includes an electric motor 40 that drives the wheels 14 that are drive wheels. The electric motor 40 is a so-called in-wheel motor housed in the wheel 14 that is a driving wheel, and is disposed under a body spring that is suspended from the vehicle body 12 via a suspension 16. The electric motor 40 is, for example, a three-phase AC motor including a U phase, a V phase, and a W phase. The electric motor 40 of each wheel 14 is driven to rotate by being supplied with power, thereby driving the wheel 14.

  The electric motor 40 is supplied with power from a power supply unit 42 disposed on the vehicle body 12 on the vehicle body spring. The power supply unit 42 includes a switching element such as an IGBT, converts a DC power supplied from a vehicle-mounted battery or the like into an AC power, and supplies the AC power to the electric motor 40. The power supply unit 42 is attached and fixed to the vehicle body 12 on the front side of the vehicle body relative to the position where the stabilizer bar 30 is disposed.

  The electric motor 40 and the power supply unit 42 are electrically connected via a power cable 44. The power cable 44 is a power cable that supplies power from the power supply unit 42 to the electric motor 40, and includes a conductor and an insulator that covers the conductor. The power cable 44 is provided for each phase. The power cables 44 for each phase are not bundled together but extend independently from each other with a space therebetween.

  The power cable 44 extends substantially linearly from the power supply unit 42 along the side member 24, and is arranged so as to bend after crossing the stabilizer 20 from the vehicle body 12 side to the wheel 14 side. It is connected to the terminal of the motor 40. That is, the power cable 44 extends linearly from the front side of the vehicle body to the rear side of the vehicle body with the stabilizer bush 22 of the side member 24 interposed therebetween, and from the inside of the vehicle body to the outside of the vehicle body on the rear side of the stabilizer bar 30 or the stabilizer link 32. Arranged to curve toward.

  The power cable 44 is relayed by a stabilizer bracket 26 that supports the stabilizer 20 on the vehicle body 12. A relay stand 46 that relays the power cable 44 is attached to the stabilizer bracket 26. The stabilizer bracket 26 has a function of relaying the power cable 44 as well as a function of supporting the stabilizer 20 on the vehicle body 12. The relay stand 46 is integrated with the stabilizer bracket 26 and is disposed in the gap between the stabilizer bush 22 and the side member 24, and is disposed adjacent to and directly above the stabilizer bush 22. The power cable 44 crosses the stabilizer bar 30 above the stabilizer bush 22 while passing through the relay stand 46.

  The relay base 46 is provided with a required number of terminals as the power cable 44 (for example, three input terminals and three output terminals in a three-phase power cable). A power supply cable 50 extending from the power supply unit 42 is connected to the input terminal 48 of the relay stand 46. A motor side cable 54 extending to the electric motor 40 is connected to the output terminal 52 of the relay stand 46. That is, the power cable 44 is divided into a power-side cable 50 and a motor-side cable 54 via the relay stand 46. The power supply cable 44 is configured such that the power supply side cable 50 and the motor side cable 54 are electrically connected via the relay stand 46.

  The power supply side cable 50 is arranged between the power supply unit 42 and the relay stand 46, and extends substantially linearly along the side member 24 below the side member 24. The motor side cable 54 is routed between the relay stand 46 and the electric motor 40 and is curved between the vehicle body 12 side and the wheel 14 side. The curve of the motor side cable 54 is formed on the stabilizer bar 30 of the stabilizer 20 and the vehicle body rear side of the stabilizer link 32, and is made outside the swinging range of the stabilizer 20.

  The power supply side cable 50 is a large diameter cable having a diameter larger than that of the motor side cable 54, and the motor side cable 54 is a small diameter cable having a diameter smaller than that of the power supply side cable 50. The power supply side cable 50 is a cable having a lower conductor resistance than the motor side cable 54 while having a low conductor resistance. The motor side cable 54 is a cable having a higher conductor resistance than the power supply side cable 50. On the other hand, it is a highly durable cable.

  In the arrangement structure of the power cable 44 described above, the power cable 44 is divided into a power-side cable 50 and a motor-side cable 54 via a relay base 46. Since the power supply side cable 44 is a large-diameter cable having a relatively large diameter as described above, and having a low durability while having a low durability, the electrical loss is small. On the other hand, since the motor-side cable 54 is a small-diameter cable having a relatively small diameter as described above, it can be easily deformed.

  Therefore, in the arrangement structure of the power cable 44 of the present embodiment, by using the large-diameter power-side cable 50 from the power supply unit 42 to the relay stand 46, it is possible to reduce electrical loss therebetween. it can. The power supply unit 42 and the relay stand 46 disposed adjacent to the upper side of the stabilizer bush 22 are fixed so as not to be relatively displaced even when the bar 30 of the stabilizer 20 rotates or the link 32 swings. Therefore, there is no inconvenience even if the power cable 44 connecting them is a large-diameter cable (power cable 50) with low durability.

  Further, by using the small-diameter motor side cable 54 from the relay stand 46 to the electric motor 40, it is possible to ensure the ease of deformation between them. The relay stand 46 disposed on the vehicle body 12 side and the electric motor 40 disposed on the wheel 14 side are relatively displaced when the bar 30 of the stabilizer 20 rotates or the link 32 swings. However, if the power cable 44 connecting the movable parts is a highly durable small-diameter cable (motor-side cable 54), durability can be ensured.

  As described above, according to the arrangement structure of the power cable 44 of the present embodiment, the power cable 44 between the electric motor 40 and the power supply unit 42 is reduced in the above-mentioned movable part while reducing electrical loss. It is possible to ensure the ease of deformation.

  The motor-side cable 54 of the power cable 44 is a curved cable arranged between the relay stand 46 and the electric motor 40 and is curved outside the swing range of the stabilizer 20. The power cable 44 crosses (relays) the stabilizer bar 30 above the stabilizer bush 22. For this reason, according to the arrangement structure of the present embodiment, even if the stabilizer 20 swings, it is avoided that the power cable 44 is affected by the swing of the stabilizer 20. Interference with parts and even the road surface is prevented.

  Further, the power cable 44 is divided into the power cable 50 and the motor cable 54 via the relay stand 46 as described above. For this reason, according to the arrangement structure of the present embodiment, compared to the structure in which the power supply unit 42 and the electric motor 40 are connected by a single power cable without going through the relay stand 46, The swivel range of the power cable 44 when the unsprung body spring is relatively displaced can be reduced, and as a result, a sufficient gap can be secured between the power cable 44 and the peripheral parts and the road surface. Interference with the peripheral components and road surface of 44 can be prevented.

  Further, the relay stand 46 that relays the power cable 44 is integrally attached to the stabilizer bracket 26 that supports the stabilizer 20 on the vehicle body 12, and is disposed in the gap between the stabilizer bush 22 and the side member 24. Yes. For this reason, according to the configuration of the present embodiment, the space for arranging the relay stand 46 and the stabilizer bracket 26 can be made more efficient and compact than the configuration in which the relay stand 46 and the stabilizer bracket 26 are separately provided. Can be achieved.

  In the above embodiment, the power supply side cable 50 corresponds to the “large diameter cable” described in the claims, and the motor side cable 54 corresponds to the “small diameter cable” described in the claims. Yes.

  By the way, in the above embodiment, the power cable 44 intersects the stabilizer bar 30 above the stabilizer bush 22, but the lower portion of the stabilizer bush 22 is fixed so as not to be displaced relative to the upper portion. Therefore, the power cable 44 may be crossed with the stabilizer bar 30 below the stabilizer bush 22.

  In the above embodiment, the motor-side cable 54 of the power cable 44 is routed from the relay base 46 to the electric motor 40, but the motor-side cable 54 is connected between the relay base 46 and the electric motor 40. It is good also as making it clamp to the wheel 14 side in the middle (for example, as shown in FIG.3 and FIG.4, the knuckle 60 is clamped using the clamp member 62). In such a modification, it is possible to further reduce the swing range of the motor side cable 54 of the power cable 44 when the upper body spring and the lower body spring are relatively displaced.

  Further, in the above embodiment, the power cable 44 that connects the power supply unit 42 and the electric motor 40 is extended from the front side of the vehicle body to the rear side of the vehicle body, and the vehicle body is located behind the stabilizer bar 30 and the stabilizer link 32 on the vehicle body side. Although the arrangement is made so that the stabilizer 20 is curved outside the swing range of the stabilizer 20 from the inside to the outside of the vehicle body, conversely, it extends from the vehicle body rear side toward the vehicle body front side, and the stabilizer bar 30 and the stabilizer link 32 are connected. Arrangement may be made so as to curve outside the swing range of the stabilizer 20 from the inside of the vehicle body to the outside of the vehicle body on the front side of the vehicle body.

  Further, in the above-described embodiment, the power cable 44 is configured such that the power cable 50 and the motor cable 54 are electrically connected via the relay base 46, but the present invention is not limited to this. Instead, the power supply side cable 50 and the motor side cable 54 may be directly connected, or may be coupled via a conductor such as a connector.

DESCRIPTION OF SYMBOLS 10 Vehicle 12 Car body 14 Wheel 20 Stabilizer 22 Stabilizer bush 26 Stabilizer bracket 30 Stabilizer bar 32 Stabilizer link 40 Electric motor 42 Power supply part 44 Power cable 46 Relay stand 50 Power supply side cable (large diameter cable)
54 Motor side cable (small diameter cable)

Claims (3)

Arrangement of an in-vehicle motor cable including a power cable that is electrically connected to an electric motor disposed under the body spring and a power supply section that is disposed on the body spring and supplies power to the electric motor. Structure,
The power cable is
It is relayed by the relay stand attached to the stabilizer bracket that supports the stabilizer on the vehicle body side,
A relatively large diameter cable arranged between the power supply unit and the relay stand; and
A small-diameter cable that is electrically connected to the large-diameter cable and is arranged between the relay stand and the electric motor and having a relatively small diameter;
An in-vehicle motor cable routing structure characterized by comprising: The power cable crosses the stabilizer above or below the stabilizer bush;
The large-diameter cable is routed from the power supply unit to the relay stand near the stabilizer bush, and
2. The cable routing structure for an in-vehicle motor according to claim 1, wherein the small-diameter cable is routed from the relay stand near the stabilizer bush to the electric motor. 3. The cable mounting structure for an in-vehicle motor according to claim 1, wherein the small-diameter cable is curved outside the swing range of the stabilizer between the relay stand and the electric motor.