JP2008001241A - Cable wiring structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress a decline in the durability of a cable in a simplified structure in which a motor is attached to a suspension unit. <P>SOLUTION: The motor 10 is supported by an upper arm 20U and a lower arm 20L of the suspension unit. The motor 10 is provided with a terminal unit 11, to which the feeder cable 12 for feeding power to the motor 10 is connected. The feeder cable 12 is disposed along the upper arm 20U and fixed to the upper arm 20U with a cable cramp 13. A direction of pulling the feeder cable 12 out of the terminal unit 11 is approximately perpendicular to a king pin axis Zp. The height of a part where the feeder cable 12 is pulled out of the terminal unit 11 from a level plane is approximately equal to the height of the upper arm 20U from the level plane. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a wiring structure to an electric motor attached to a link of a suspension device provided in a vehicle.

  In an electric vehicle or a fuel cell vehicle driven using a battery or a fuel cell, a so-called in-wheel motor system in which an electric motor is arranged inside the wheel to drive the wheel has been studied. Patent Document 1 discloses a power line wiring structure for an in-wheel motor including an intermediate roller and a stationary guide that regulates a moving direction of the deflection of the power line with respect to turning and swinging of the wheel.

JP 2005-104329 A

  However, in the technique disclosed in Patent Document 1, it is necessary to provide a fixed-side guide and an intermediate roller as means for regulating the movement of the power line, and there is a problem that the structure becomes complicated. Further, in the technique disclosed in Patent Document 1, the power line is wound around the intermediate roller. However, in this portion, the load on the power line is increased, and the durability of the power line may be reduced.

  Therefore, the present invention has been made in view of the above, and in connecting the electric wire to the electric motor indicated by the link of the suspension device of the vehicle, the durability of the electric wire connected to the electric motor is not provided without providing a separate member. It aims at providing the wiring structure of the electric wire which can suppress a property fall.

  In order to solve the above-described problems and achieve the object, the wiring structure of the electric wire according to the present invention is configured to connect a part of the electric wire to the electric motor attached to the link constituting the suspension device of the vehicle. The direction in which the electric wire is drawn out from the connection portion between the electric motor and the electric wire is arranged along the link and intersects the direction in which the electric motor attached to the link of the suspension device moves, In a state where the vehicle is installed on a horizontal plane, a distance from the horizontal plane at a position where the electric wire is drawn out from the connection portion is equal to a distance from the horizontal plane of the link where the electric wire is arranged. And

  The wiring structure of this electric wire is a so-called in-wheel motor type, in which the electric wire connected to the electric motor is along the link (arm) of the suspension device and the direction in which the electric wire is drawn out from the electric wire connecting portion provided in the electric motor, Along with the operation of the suspension device, it intersects at a predetermined angle with respect to the direction in which the electric motor moves, more preferably orthogonal. Furthermore, the position where an electric wire is pulled out from the connection part of the electric wire provided in an electric motor is aligned with the height of the link along the electric wire. As a result, when the electric motor moves up and down with the vertical movement of the suspension device, or when the electric motor attached to the steering wheel rotates around the kingpin shaft, the connection provided in the electric motor is not provided. Bending and twisting of the electric wire drawn out from the part can be reduced. As a result, it is possible to suppress a decrease in durability of the electric wire connected to the electric motor with a simple structure without providing another member when attaching the electric wire to the electric motor.

  In the wiring structure of an electric wire according to the present invention, when connecting an electric wire to an electric motor attached to a link constituting a suspension device of a vehicle, a part of the electric wire is arranged along the link, and the vehicle In a state where the wire is installed on the horizontal plane, the direction in which the electric wire is drawn out from the connecting portion between the electric motor and the electric wire is set to a predetermined angle or less with respect to the horizontal plane, and the electric wire is drawn out from the connecting portion. The distance from the horizontal plane is equal to the distance from the horizontal plane of the link where the electric wire is arranged.

  The wiring structure of this electric wire is a so-called in-wheel motor type. Or less, more preferably approximately parallel. Furthermore, the position where an electric wire is pulled out from the connection part of the electric wire provided in an electric motor is aligned with the height of the link along the electric wire. As a result, when the electric motor moves up and down with the vertical movement of the suspension device, or when the electric motor attached to the steering wheel rotates around the kingpin shaft, the connection provided in the electric motor is not provided. Bending and twisting of the electric wire drawn out from the part can be reduced. As a result, it is possible to suppress a decrease in durability of the electric wire connected to the electric motor with a simple structure without providing another member when attaching the electric wire to the electric motor.

  In the wiring structure of the electric wire according to the present invention, in connecting the electric wire to the electric motor attached to the link constituting the suspension device of the vehicle, a part of the electric wire is arranged along the link, and the electric motor The direction in which the electric wire is drawn out from the connecting portion between the electric wire and the electric wire is set to a predetermined angle or less with respect to the link, and the electric wire is drawn out from the connecting portion in a state where the vehicle is installed on a horizontal plane. The distance from the horizontal plane is equal to the distance from the horizontal plane of the link where the electric wire is arranged.

  This wire wiring structure is a so-called in-wheel motor type in which the wire connected to the motor is routed along the link of the suspension device, and the direction in which the wire is drawn out from the connecting portion of the wire provided in the motor is aligned with the wire. It is set to be equal to or less than a predetermined angle, more preferably substantially parallel to the link to be set. Furthermore, the position where an electric wire is pulled out from the connection part of the electric wire provided in an electric motor is aligned with the height of the link along the electric wire. As a result, when the electric motor moves up and down with the vertical movement of the suspension device, or when the electric motor attached to the steering wheel rotates around the kingpin shaft, the connection provided in the electric motor is not provided. Bending and twisting of the electric wire drawn out from the part can be reduced. As a result, it is possible to suppress a decrease in durability of the electric wire connected to the electric motor with a simple structure without providing another member when attaching the electric wire to the electric motor.

  In the wiring structure of the electric wire according to the present invention, in connecting the electric wire to the electric motor attached to the link constituting the suspension device of the vehicle, a part of the electric wire is arranged along the link, and the electric motor The direction in which the electric wire is drawn out from the connecting portion between the electric wire and the electric wire intersects with the kingpin axis of the suspension device, and the electric wire is drawn out from the connecting portion in a state where the vehicle is installed on a horizontal plane. The distance from the horizontal plane is equal to the distance from the horizontal plane of the link where the electric wire is arranged.

  The wiring structure of this electric wire is a so-called in-wheel motor type in which the electric wire connected to the electric motor is routed along the link of the suspension device, and the direction in which the electric wire is drawn out from the connecting portion of the electric wire provided in the electric motor is It intersects at a predetermined angle with respect to the kingpin axis, more preferably, it is orthogonal. Furthermore, the position where an electric wire is pulled out from the connection part of the electric wire provided in an electric motor is aligned with the height of the link along the electric wire. As a result, when the suspension device moves up and down, the motor moves up and down, and when the motor attached to the steered wheel rotates around the kingpin shaft, a connecting portion provided in the motor without providing a separate member. It is possible to reduce the bending and twisting of the wire drawn from the wire. As a result, it is possible to suppress a decrease in durability of the electric wire connected to the electric motor with a simple structure without providing another member when attaching the electric wire to the electric motor.

  In the wire wiring structure according to the present invention, when the suspension device includes a kingpin shaft, the wire wraps around the kingpin shaft of the suspension device from the wheel side of the vehicle. It is preferable to arrange | position in.

  As in the electric wire wiring structure according to the present invention, in the electric wire wiring structure, the electric wire connecting portion is either on the upper side or the lower side in the vertical direction of the electric motor in a state where the vehicle is installed on a horizontal plane. It is preferable to be provided on one side.

  According to this invention, when connecting an electric wire to the electric motor instruct | indicated by the link of the suspension apparatus of a vehicle, durability reduction of the electric wire connected to an electric motor can be suppressed, without providing another member.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The present invention is not limited by the best mode for carrying out the invention (hereinafter referred to as an embodiment). In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art, or substantially the same, so-called equivalent ranges. The present invention is applicable to any vehicle in which an electric motor is attached to a link of a suspension device, such as a so-called in-wheel motor, and does not need to be a vehicle using only the electric motor as a drive source.

  In this embodiment, like a so-called in-wheel motor, in a vehicle in which an electric motor is attached to a link (arm) constituting a suspension device of the vehicle, information used to supply electric power to the electric motor or to control the electric motor is transmitted to the in-vehicle control device. An electric wire for transmission is arranged along the link, and the direction in which the electric wire is drawn out from the connection portion between the electric motor and the electric wire is relative to the direction in which the electric motor moves when the suspension device operates. It is characterized in that it is configured to intersect (preferably the intersection angle is 90 degrees, approximately 60 degrees or more).

  FIG. 1 is a conceptual diagram showing a configuration example of a vehicle to which the wire wiring structure according to this embodiment is applied. “IN” in FIG. 1 indicates the inside of the vehicle 1, and “OUT” indicates the outside of the vehicle 1. The vehicle 1 includes a traveling device 100 that uses an electric motor as power generation means. The traveling device 100 includes a traveling device 100 of a so-called in-wheel motor type in which an electric motor is disposed in a wheel of a drive wheel, and the electric motor is attached to a link of a suspension device.

  The vehicle 1 moves forward in the direction of the arrow X, and distinguishes left and right on the basis of the forward direction of the vehicle 1. That is, “left” refers to the left side in the direction in which the vehicle 1 moves forward, and “right” refers to the right side in the direction in which the vehicle 1 moves forward. Further, the forward direction side of the vehicle 1 is the front or front of the vehicle 1, and the backward direction of the vehicle 1 is the rear or rear of the vehicle 1.

  In this embodiment, the power generation means included in the traveling device 100 includes a left front wheel motor 10FL that drives the left front wheel 2FL of the vehicle 1, a right front wheel motor 10FR that drives the right front wheel 2FR, and a left side that drives the left rear wheel 2RL. They are a rear wheel motor 10RL and a right rear wheel motor 10RR that drives the right rear wheel 2RR. Thus, the vehicle 1 has all four wheels as drive wheels. The vehicle 1 does not need to be all four wheels, and at least one wheel may be a driving wheel. The driving force of each wheel of the vehicle 1 is controlled by an ECU (Electronic Control Unit) 50. And the distribution ratio of the driving force of each wheel is changed by ECU50 as needed. In this embodiment, the total driving force F of the traveling device 100 is controlled by the opening of the accelerator 5 detected by the accelerator opening sensor 42.

  A speed reduction mechanism may be provided between the electric motor and the wheel, and the rotational speed of each electric motor may be reduced and transmitted to each wheel. In general, when the electric motor is downsized, the torque decreases, but the torque of the electric motor can be increased by providing a speed reduction mechanism. As a result, the left front wheel motor 10FL, the right front wheel motor 10FR, the left rear wheel motor 10RL, and the right rear wheel motor 10RR can be reduced in size.

  The left front wheel motor 10FL, the right front wheel motor 10FR, the left rear wheel motor 10RL, and the right rear wheel motor 10RR are respectively a left front wheel resolver 40FL, a right front wheel resolver 40FR, a left rear wheel resolver 40RL, and a right rear wheel resolver 40RR. Thus, the rotation angle and the rotation speed are detected. The output of each resolver is taken into the ECU 50 and used to control the left front wheel motor 10FL, the right front wheel motor 10FR, the left rear wheel motor 10RL, and the right rear wheel motor 10RR.

  The left front wheel motor 10FL, the right front wheel motor 10FR, the left rear wheel motor 10RL, and the right rear wheel motor 10RR are connected to the inverter 3. For example, an in-vehicle power source 4 such as a nickel-hydrogen battery, a lead storage battery, or a fuel cell 4F is connected to the inverter 3, and is supplied to each electric motor via the inverter 3 as necessary. When the vehicle 1 according to this embodiment is a fuel cell vehicle, the vehicle 1 includes at least a fuel cell 4F. Further, when the vehicle 1 according to this embodiment is an electric vehicle (a system that does not use a fuel cell), the vehicle 1 includes only the in-vehicle power supply 4. The output generated by each electric motor is controlled by controlling the inverter 3 according to a command from the ECU 50. In this embodiment, one motor is controlled by one inverter. In order to control four motors, the inverter 3 has a total of four inverters, one for each motor.

  When the left front wheel motor 10FL, the right front wheel motor 10FR, the left rear wheel motor 10RL, and the right rear wheel motor 10RR are used as the driving source of the traveling device 100, the power of the in-vehicle power supply 4 is supplied via the inverter 3. The For example, when the vehicle 1 is decelerated, the left front wheel motor 10FL, the right front wheel motor 10FR, the left rear wheel motor 10RL, and the right rear wheel motor 10RR function as a generator to perform regenerative power generation stored in the battery. Is stored in an in-vehicle power source 4 such as a nickel-hydrogen battery or a lead storage battery. This is realized by the ECU 50 controlling the inverter 3 based on a brake signal, an accelerator-off signal, or the like.

  Next, the wiring structure of the electric wire according to this embodiment will be described. In the following description, please refer to FIG. 1 as appropriate. The electric motors included in the traveling device 100 of the vehicle 1 are the left front wheel motor 10FL, the right front wheel motor 10FR, the left rear wheel motor 10RL, and the right rear wheel motor 10RR. Are simply referred to as the electric motor 10. The following configuration is a common configuration for each electric motor included in the traveling device 100 of the vehicle 1.

  FIG. 2 is a perspective view for explaining the wiring structure of the electric wire according to this embodiment. FIG. 3 is a front view illustrating the wiring structure of the electric wire according to this embodiment. FIG. 4 is a side view for explaining the wiring structure of the electric wire according to this embodiment. FIG. 5 is a plan view for explaining the wiring structure of the electric wire according to this embodiment. In the following, an example will be described in which the electric motor 10 is attached to a so-called double wishbone type suspension device to form an in-wheel motor, but the type of suspension device is not limited to this. For example, a suspension device of a so-called strut type or torsion beam type may be used. In the following, a suspension device for a steered wheel (front wheel) is taken as an example. Here, the arrow g direction in FIGS. 2 to 4 indicates the action direction (vertical direction) of gravity. The gravity direction is the lower side or the lower side, and the side opposite to the gravity direction is the upper side or the upper side (the same applies hereinafter).

  As shown in FIGS. 2 and 3, the electric motor 10 is supported by an upper arm 20U and a lower arm 20L that are links of the suspension device. More specifically, the electric motor 10 is supported by a ball joint 22U of the upper arm 20U and a ball joint 22L of the lower arm 20L so as to be movable in the vertical direction (direction of arrow Y in FIG. 2) and rotatable about the kingpin axis Zp. Is done. Thus, the tire 2T follows the road surface and functions as a steering wheel of the vehicle 1. In the double wishbone type suspension device, the kingpin axis Zp is an axis connecting the ball joint 22U of the upper arm 20U and the ball joint 22L of the lower arm 20L.

  The power generated by the electric motor 10 is taken out from the output shaft 10S. As shown in FIG. 3, a wheel 2 </ b> W is attached to the output shaft 10 </ b> S via a bolt 9. A tire 2T is attached to the wheel 2W, and when the output shaft 10S of the electric motor 10 rotates, the wheel 2W and the tire 2T rotate about a rotation axis (electric motor rotation axis) Zr of the electric motor 10. As a result, the power generated by the electric motor 10 is transmitted to the road surface via the wheel 2W and the tire 2T, and the vehicle 1 is caused to travel. A disk rotor 8 constituting a disk brake is attached to the output shaft 10S.

  The electric motor 10 is connected to an electric wire (hereinafter referred to as a power supply cable) 12 that supplies driving power from the inverter 3 (see FIG. 1). The electric motor 10 is an induction motor, and since three-phase alternating current is supplied from the inverter 3, the three power supply cables 12 are connected to the electric motor 10. The electric motor 10 is provided with a terminal portion (electric wire connecting portion) 11 for connecting a power feeding cable 12 to which a total of four power feeding cables 12 and signal wires (not shown) are connected. The The power feeding cable 12 uses a thick electric wire, that is, a thick electric wire in order to supply the electric energy for running the vehicle 1 to the electric motor 10. For this reason, the power feeding cable 12 lacks flexibility, and durability may be lowered when bending and twisting are repeated. Note that, as with the power supply cable 12, if the signal wire is repeatedly bent and twisted, the durability may decrease. In particular, when the electric motor 10 moves up and down together with the tire 2T or is steered around the kingpin shaft as in the in-wheel motor type, the risk of a decrease in durability increases.

  In the wiring structure of the electric wire according to this embodiment, the power feeding cable 12 that is an electric wire is placed along the link of the suspension device (in this embodiment, the upper arm 20U), and is connected to the upper arm 20U by the cable clamp 13 that is an electric wire fixing means. Fix (see FIGS. 2, 3 and 5). Further, in a state where the vehicle 1 is installed on the horizontal plane GL, the position (electric wire drawing position) 12C (see FIG. 4) from the horizontal plane GL where the feeding cable 12 that is the electric wire is drawn out from the terminal portion 11 that is the connecting portion of the electric wire. The distance hc is equivalent to the distance ha from the horizontal plane GL of the upper arm 20U where the power supply cable 12 is disposed.

  Here, hc and ha are equal to each other, in addition to the case where both are equal, the absolute value | hc−ha | of the distance between the upper arm 20U, which is a link, and the feeding cable 12 is within five times the diameter of the feeding cable 12 Or within 50 mm. Further, the distance hc from the horizontal plane GL of the wire drawing position 12C is defined with the center of the power feeding cable 12 as a reference. Further, the distance ha from the horizontal plane GL of the upper arm 20U is the center of the connecting portion between the motor 10 and the link of the suspension device (upper arm 20U in this embodiment) arranged along the electric wire (feed cable 12) (this implementation). In the form, it is defined with reference to the center of the ball joint 22U.

  As shown in FIG. 4, in the wiring structure of the electric wire according to this embodiment, the direction (arrow C direction) in which the power feeding cable 12 as the electric wire is drawn out from the terminal portion 11 as the electric wire connecting portion is the kingpin axis Zp. And intersect (substantially orthogonal in this embodiment). With this configuration, in this embodiment, bending and twisting of the power feeding cable 12 due to the operation (vertical movement) of the electric motor 10 accompanying the operation (vertical movement) of the suspension device is reduced.

  Further, in this embodiment, when the electric motor 10 is attached to a steered wheel, as shown in FIGS. 2 and 5, the power supply cable 12, which is an electric wire, is connected to the kingpin axis Zp of the suspension device on the wheel side (that is, the vehicle 1 Is arranged so as to wrap around from the OUT side). As a result, bending and twisting of the power supply cable 12 due to the rotation of the electric motor 10 around the kingpin axis Zp accompanying the steering of the wheel is reduced. In this embodiment, as shown in FIG. 5, the direction in which the power feeding cable 12 is pulled out from the terminal portion 11 (arrow C direction) and the motor rotation axis Zr are substantially orthogonal, but the power feeding cable 12 is a terminal. The direction drawn from the part 11 is not limited to this.

  With the configuration as described above, in the wire wiring structure according to this embodiment, the existing structure is used, and the power supply cable resulting from the vertical movement and rotation of the electric motor 10 accompanying the vertical movement of the suspension device and the steering of the wheel 12 bending and twisting can be reduced. As a result, in the wiring structure of the electric wire according to this embodiment, the possibility that the durability of the power feeding cable 12 is reduced without increasing the number of parts is extremely reduced, and the durability reduction of the power feeding cable 12 is effectively suppressed. it can.

  FIG. 6 is a perspective view showing a wiring structure of the electric wire in which the direction in which the electric wire is drawn out from the connecting portion of the electric wire is substantially parallel to the kingpin axis. FIGS. 7A and 7B are conceptual diagrams for explaining the movement of the electric wire in the electric wire wiring structure in which the direction in which the electric wire is drawn out from the connecting portion of the electric wire is substantially parallel to the kingpin axis. FIGS. 8-1 and FIGS. 8-2 are the conceptual diagrams explaining the movement of the electric wire in the wiring structure of the electric wire which concerns on this embodiment. In the electric wire wiring structure shown in FIG. 6, the direction in which the feeding cable (electric wire) 112 is drawn from the terminal portion (electric wire connecting portion) 111 of the electric motor 110 (arrow C direction) is substantially parallel to the kingpin axis Zp. . In this state, the feeding cable 112 is fixed to the upper arm 120U of the suspension device by the cable clamp 113 which is a wire fixing means.

  In the wiring structure of the electric wire in which the direction in which the electric wire is drawn out from the connecting portion of the electric wire is substantially parallel to the kingpin axis, as shown in FIG. 7A, the electric motor 110 moves upward in accordance with the operation of the suspension device. The radius of bending at the portion indicated by A of the cable 112 is reduced. Further, as shown in FIG. 7-2, the rotation of the electric motor 110 around the kingpin axis Zp (movement in the direction of arrow K in FIG. Twist occurs in the part indicated by. As described above, in the electric wire wiring structure shown in FIG. 6, bending and twisting are simultaneously or alternately applied to the feeding cable 112 between the terminal portion 111 that is the connecting portion of the electric wire and the cable clamp 113 that is the fixing portion of the electric wire. By acting on the power supply cable 112, the power supply cable 112 may be fatigued, resulting in a decrease in durability.

  On the other hand, in the wiring structure of the electric wire according to this embodiment, as described above, the direction in which the power feeding cable 12 that is the electric wire is drawn out from the terminal portion 11 that is the electric wire connecting portion intersects with the kingpin axis Zp. Preferably, it is configured to be substantially orthogonal. As a result, as shown in FIG. 8A, the bending radius change in the portion indicated by A of the feeding cable 12 and the twisting of the feeding cable 12 due to the electric motor 10 moving upward with the operation of the suspension device. Becomes smaller.

  Further, the distance from the horizontal plane where the power supply cable 12 is drawn out from the terminal portion 11 is equivalent to the distance from the horizontal plane of the upper arm 20U where the power supply cable 12 is arranged. As a result, even if the electric motor 10 rotates about the kingpin axis Zp as the wheels are steered, the feeding cable 12 is bent in a substantially horizontal state with respect to the kingpin axis Zp. -2 can be prevented from twisting due to the movement in the arrow K direction).

  Further, as shown in FIG. 8B, since the power feeding cable 12 is arranged so as to go around the kingpin shaft Zp from the wheel side, it is caused by the rotation of the electric motor 10 around the kingpin shaft Zp accompanying the steering of the wheel. The movement of the feeding cable 12 can be suppressed. As a result, it is possible to more effectively reduce twisting and bending at the portion indicated by B of the power supply cable 12 and reduce the load on the power supply cable 12.

  Thus, in the wiring structure of the electric wire according to this embodiment, bending and twisting generated in the power feeding cable 12 between the terminal portion 11 that is a connecting portion of the electric wire and the cable clamp 13 that is a fixing portion of the electric wire can be reduced. Therefore, it is possible to effectively suppress a decrease in durability due to fatigue of the feeding cable 12 without providing another member.

  Here, the crossing angle θ (see FIG. 4) at which the direction in which the electric wire is drawn out from the connecting portion of the electric wire and the kingpin axis intersect is generally from the viewpoint of suppressing bending and twisting of the power feeding cable 12 due to the vertical movement of the electric motor 10. 60 degree | times or more is preferable and can suppress the bending and twist of the electric power feeding cable 12 more effectively. Ideally, the direction in which the electric wire is drawn out from the connecting portion of the electric wire and the kingpin axis are preferably substantially orthogonal (85 degrees to 95 degrees).

  9A to 9C, 10, and 11 are conceptual diagrams illustrating a method for defining the direction in which the power feeding cable is drawn from the terminal portion. In the example shown in FIGS. 9-1 to 9-3, the direction in which the electric wire is drawn out from the connecting portion of the electric wire (arrow C in the figure) is the direction in which the electric motor 10 attached to the link of the suspension device moves (see FIG. 9). Ls) in the middle (in this embodiment, substantially orthogonal). When the direction in which the electric wire is drawn out from the connecting portion of the electric wire is made in this way, the bending and twisting of the power feeding cable 12 due to the vertical movement of the electric motor 10 accompanying the vertical movement of the suspension device is extremely reduced. Reduction can be effectively suppressed.

  The crossing angle θ (see FIG. 4) at which the direction in which the electric wire is drawn out from the connecting portion of the electric wire and the direction in which the motor moves together with the operation (vertical movement) of the suspension device is the feeding cable 12 due to the vertical movement of the electric motor 10. From the viewpoint of suppressing bending and twisting, the angle is set to 60 ° or more, but more preferably 70 ° or more. Furthermore, the intersection angle θ is preferably 80 degrees or more. As described above, when the crossing angle θ is close to 90 degrees, bending and twisting of the feeding cable 12 can be more effectively suppressed, and ideally, the direction in which the wire is drawn out from the connecting portion of the wire and the operation of the suspension device It is preferable to make the direction in which the motor moves together with (vertical movement) substantially orthogonal (85 to 95 degrees).

When the suspension device moves up and down, the motor 10 attached to the link of the suspension device also moves up and down. In the example shown in FIGS. 9A to 9C, if the electric motor 10 can move from the position indicated by the solid line to the position indicated by the dotted line, the rotation axis Zr of the electric motor 10 is the same as that of the electric motor 10 as the electric motor 10 moves. Move a distance. When motor rotation shaft Zr is in the position shown in Zr _1, the motor 10 is to be in the lowermost position (the maximum value of the rebound, i.e., elongation-side). On the other hand, when the motor rotation axis Zr is at the position indicated by Zr ₂ , the motor 10 is assumed to be at the uppermost position (maximum value on the bounce side, that is, the contraction side).

In a certain suspension system, the maximum movable range of the electric motor 10 is from the maximum value on the rebound side to the maximum value on the bound side (from Zr ₁ to Zr ₂ ). The specific point P is determined for the electric motor 10, and the direction in which the electric motor 10 moves is the direction in which the straight line ls connecting the specific point P at the maximum value on the rebound side of the electric motor 10 and the specific point P at the maximum value on the bounce side extends. To do. The specific point P may be a point that represents the same position of the electric motor 10 before and after the operation of the electric motor 10, and is, for example, the center CL of the electric motor 10 in the direction parallel to the electric motor rotation axis Zr on the electric motor rotation axis Zr. .

FIG. 9-3 shows a direction in which the electric motor 10 moves in a so-called trailing arm suspension. In the suspension device using the trailing arm TL, the direction in which the electric motor 10 moves can be determined as described above in consideration of the fact that the electric motor 10 does not normally move in the direction of the rotation axis. That is, when the rotation axis of the electric motor 10 indicating the maximum value on the rebound side is indicated by Zr ₁ and the rotation axis of the electric motor 10 indicating the maximum value on the bounce side is indicated by Zr ₂ , a straight line ls connecting Zr ₁ and Zr ₂ is obtained. The extending direction is the direction in which the electric motor 10 moves.

  FIG. 10 shows a direction (arrow C direction) in which the feeding cable 12 is pulled out from the terminal portion 11 which is a connecting portion of the electric wire provided in the electric motor 10 in a state where the wheels 2 of the vehicle 1 are installed on the horizontal plane GL. It is substantially parallel to GL. Further, in FIG. 11, the direction (arrow C direction) in which the feeding cable 12 is pulled out from the terminal portion 11 which is a connecting portion of the electric wire provided in the electric motor 10 is substantially parallel to the suspension link (upper arm 20U in this example). I have to. When the direction in which the electric wire is drawn out from the connecting portion of the electric wire is made in this way, the bending and twisting of the power feeding cable 12 due to the vertical movement of the electric motor 10 accompanying the vertical movement of the suspension device is extremely reduced. Reduction can be effectively suppressed.

  As shown in FIGS. 10 and 11, the direction in which the electric wire is drawn out from the connecting portion of the electric wire (arrow C direction) is substantially parallel to the horizontal plane GL (FIG. 10) and the upper arm 20U (FIG. 11). Preferably, the direction in which the electric wire is drawn out from the connecting portion of the electric wire (arrow C direction) intersects the horizontal plane GL (FIG. 10) and the upper arm 20U (FIG. 11) if the angle is a predetermined angle or less. Also good. The angle formed by the direction in which the electric wire is drawn out from the connecting portion of the electric wire (arrow C direction) and the horizontal plane GL (FIG. 10) or the upper arm 20U (FIG. 11) Although the angle is set to 30 degrees or less from the viewpoint of suppressing twisting, the angle close to 0 degrees can more effectively suppress bending and twisting of the feeding cable 12, and ideally as described above It is preferable that the direction in which the electric wire is drawn from the section (the direction of arrow C) and the horizontal plane GL (FIG. 10) and the upper arm 20U (FIG. 11) are substantially parallel (−5 degrees to 5 degrees).

  12 and 13 are explanatory views showing another example in which the electric wire is arranged along the link of the suspension device. Like the wiring structure of the electric wire shown in FIG. 12, the power feeding cable 12 may be arranged along the lower side of the upper arm 20 </ b> U and fixed by the cable clamp 13. If it does in this way, protection of the electric power feeding cable 12 by the upper arm 20U can be aimed at.

  Moreover, you may arrange | position the electric power feeding cable 12 along the lower arm 20L like the wiring structure of the electric wire shown in FIG. In this case, the terminal part 11 which is a connection part of an electric wire is provided under the electric motor 10 (namely, the lower arm 20L side). The power feeding cable 12 is arranged along the upper side or the lower side of the lower arm 20L, and is fixed by the cable clamp 13. When the power feeding cable 12 is arranged along the lower arm 20L, it is more preferable to arrange the power feeding cable 12 on the upper side of the lower arm 20L because the lower arm 20L can protect the power feeding cable 12 from a stepping stone or an obstacle from the ground.

  FIG. 14 is an explanatory diagram showing the position of the connecting portion of the electric wire. In the above description, the terminal portion 11 that is a connecting portion of the electric wire is attached to the side surface of the electric motor 10 (a surface parallel to the rotation axis Zr of the electric motor 10) (see FIG. 2). As shown in FIG. 14, the terminal portion 11 may be attached to the back surface of the electric motor 10 (the vehicle side of the surface orthogonal to the electric motor 10 and the rotation axis Zr). In this case, the direction in which the power feeding cable 12 is drawn out from the terminal portion 11 is configured to be substantially orthogonal to the direction in which the kingpin axis Zp or the electric motor 10 moves. If the terminal part 11 is attached to the back surface of the electric motor 10, the dimension in the radial direction of the electric motor 10 can be suppressed, which is preferable for the configuration of the in-wheel motor system in which the electric motor 10 is arranged in the wheel.

  FIG. 15 is a perspective view showing an example in which the wiring structure of the electric wire according to this embodiment is applied to a so-called strut-type suspension device. In the wire wiring structure, the electric motor 10 is attached to the strut shell 21 via a bracket 21B. The terminal portion 11 that is a connecting portion of the electric wire is provided on the lower side of the electric motor 10 (that is, the lower arm 20L side), and the feeding cable 12 is disposed along the lower arm 20L, and is connected to the lower arm 20L by the cable clamp 13. Fixed.

  As described above, in this embodiment, in the so-called in-wheel motor type, the position of the electric wire connected to the motor along the link of the suspension device and the position where the electric wire is drawn out from the connection portion of the electric wire provided in the electric motor is aligned with the electric wire. Align with the height of the link to be made. Further, the direction in which the electric wire is drawn out from the connecting portion of the electric wire provided in the electric motor intersects at a predetermined angle with respect to the direction in which the electric motor operates (vertical movement) together with the operation of the suspension device (vertical movement), more preferably orthogonal .

  As a result, when the electric motor moves up and down with the vertical movement of the suspension device, or when the electric motor attached to the steering wheel rotates around the kingpin shaft, the connection provided in the electric motor is not provided. Bending and twisting of the electric wire drawn out from the part can be reduced. As a result, it is possible to suppress a decrease in durability of the electric wire connected to the electric motor with a simple structure without providing another member when attaching the electric wire to the electric motor.

  As described above, the wiring structure of the electric wire according to the present invention is useful for a structure in which the electric motor is attached to the link of the suspension device, and particularly suppresses a decrease in durability of the electric wire connected to the electric motor with a simple configuration. Suitable for that.

It is a conceptual diagram which shows the structural example of the vehicle to which the wiring structure of the electric wire which concerns on this embodiment is applied. It is a perspective view explaining the wiring structure of the electric wire which concerns on this embodiment. It is a front view explaining the wiring structure of the electric wire which concerns on this embodiment. It is a side view explaining the wiring structure of the electric wire which concerns on this embodiment. It is a top view explaining the wiring structure of the electric wire which concerns on this embodiment. It is a perspective view which shows the wiring structure of the electric wire which made the direction where an electric wire is pulled out from the connection part of an electric wire substantially parallel to the kingpin axis | shaft. It is a conceptual diagram explaining the movement of the electric wire in the wiring structure of the electric wire which made the direction where an electric wire is pulled out from the connection part of an electric wire substantially parallel to the kingpin axis | shaft. It is a conceptual diagram explaining the movement of the electric wire in the wiring structure of the electric wire which made the direction where an electric wire is pulled out from the connection part of an electric wire substantially parallel to the kingpin axis | shaft. It is a conceptual diagram explaining the movement of the electric wire in the wiring structure of the electric wire which concerns on this embodiment. It is a conceptual diagram explaining the movement of the electric wire in the wiring structure of the electric wire which concerns on this embodiment. It is a conceptual diagram explaining the prescription | regulation method of the direction where an electric power feeding cable is pulled out from a terminal part. It is a conceptual diagram explaining the prescription | regulation method of the direction where an electric power feeding cable is pulled out from a terminal part. It is a conceptual diagram explaining the prescription | regulation method of the direction where an electric power feeding cable is pulled out from a terminal part. It is a conceptual diagram explaining the prescription | regulation method of the direction where an electric power feeding cable is pulled out from a terminal part. It is a conceptual diagram explaining the prescription | regulation method of the direction where an electric power feeding cable is pulled out from a terminal part. It is explanatory drawing which shows the other example which arrange | positions an electric wire along the link of a suspension apparatus. It is explanatory drawing which shows the other example which arrange | positions an electric wire along the link of a suspension apparatus. It is explanatory drawing which shows the position of the connection part of an electric wire. It is a perspective view which shows the example which applied the wiring structure of the electric wire which concerns on this embodiment to what is called a strut type suspension apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Wheel 2T Tire 2W Wheel 3 Inverter 4 Car-mounted power supply 5 Accelerator 10 Electric motor 10S Output shaft 11 Terminal part 12 Power supply cable 13 Cable clamp 20L Lower arm 20U Upper arm 21 Strut shell 21B Bracket 100 Traveling device

Claims (6)

When connecting electric wires to the motors attached to the links that make up the suspension system of the vehicle,
Place a part of the wire along the link,
And the direction in which the electric wire is drawn out from the connecting portion between the electric motor and the electric wire intersects the direction in which the electric motor attached to the link of the suspension device moves,
In a state where the vehicle is installed on a horizontal plane, a distance from the horizontal plane at a position where the electric wire is drawn out from the connection portion is equal to a distance from the horizontal plane of the link where the electric wire is arranged. Wiring structure of the electric wire. When connecting electric wires to the motors attached to the links that make up the suspension system of the vehicle,
Place a part of the wire along the link,
And in the state where the vehicle is installed on a horizontal plane, the direction in which the electric wire is drawn out from the connecting portion between the electric motor and the electric wire is set to a predetermined angle or less with respect to the horizontal plane,
The distance between the position where the electric wire is drawn out from the connecting portion and the horizontal plane is equal to the distance from the horizontal plane of the link where the electric wire is arranged. When connecting electric wires to the motors attached to the links that make up the suspension system of the vehicle,
Place a part of the wire along the link,
And while making the direction where the electric wire is pulled out from the connection part of the electric motor and the electric wire below a predetermined angle with respect to the link,
In a state where the vehicle is installed on a horizontal plane, a distance from the horizontal plane at a position where the electric wire is drawn out from the connection portion is equal to a distance from the horizontal plane of the link where the electric wire is arranged. Wiring structure of the electric wire. When connecting electric wires to the motors attached to the links that make up the suspension system of the vehicle,
Place a part of the wire along the link,
And the direction in which the electric wire is drawn out from the connecting portion between the electric motor and the electric wire intersects with the kingpin axis of the suspension device,
In a state where the vehicle is installed on a horizontal plane, a distance from the horizontal plane at a position where the electric wire is drawn out from the connection portion is equal to a distance from the horizontal plane of the link where the electric wire is arranged. Wiring structure of the electric wire.   The said electric wire is arrange | positioned so that the kingpin axis | shaft of the said suspension apparatus may be wound from the wheel side of the said vehicle, when the said suspension apparatus is provided with the kingpin axis | shaft, The any one of Claims 1-4 characterized by the above-mentioned. The wiring structure of the electric wire described.   The connection part of the said electric wire is provided in any one of the vertical direction upper side or the lower side of the said motor in the state which installed the said vehicle in the horizontal surface, The any one of Claims 1-5 characterized by the above-mentioned. Wiring structure of the wire.

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