JP6514468B2 - Power wire wiring structure of in-wheel motor drive device - Google Patents

Description

  The present invention relates to an in-wheel motor drive that is disposed inside a wheel of a passenger vehicle and drives the wheel, and more particularly to the arrangement of power lines extending from the vehicle body side to the in-wheel motor drive.

  An in-wheel motor is known which is disposed in an inner space area of a wheel of an electric vehicle and drives the wheel. The in-wheel motor and the wheels need to be attached to the vehicle body by a suitable structure. As a structure which attaches an in-wheel motor to a vehicle body, the thing as described in Unexamined-Japanese-Patent No. 2013-112003 (patent document 1) is known conventionally, for example. The electric vehicle described in Patent Document 1 includes a wheel, an in-wheel motor disposed inside the wheel, a plurality of suspension arms connecting the in-wheel motor to the vehicle body, and three wheels extending from the in-wheel motor to the vehicle body It comprises a power cable, one sensor cable, and a corrugated tube covering each of the four cables.

Unexamined-Japanese-Patent No. 2013-112003

  In the above-described conventional electric powered vehicle, it is desirable to bundle three power cables and one sensor cable, cover them with a common corrugated tube, and unify the wiring. As a modification, it is conceivable to use the wheels as steered wheels and attach the in-wheel motor to a steerable suspension device. In this case, the inventor found that there is a point to be further improved.

  That is, since the electric powered vehicle not only goes straight but also turns right or left, the steered wheels repeat steering left and right around the steering axis. At that time, the in-wheel motor is also steered, and these cables and corrugated tubes also repeat bending and stretching. It has been found that even if such a cable can be damaged or broken, even if the cable can be bent or stretched frequently in daily running, it can be damaged or broken.

  As a reason for this, it can be considered that even if the cable is a bendable stranded wire, it is not perfect against accumulation of tens of thousands to hundreds of thousands of bending fatigue. In particular, a power cable through which a large current flows has a large thickness and a large minimum bending radius, so it is weak against bending deformation with a small radius. In addition, the wheel housing which accommodates the steered wheels, the in-wheel motor, and the suspension member in the recess space formed in the vehicle body has only a size corresponding to the maximum steered angle of the steered wheels, There is not enough room for the dimensions. Therefore, it is difficult to secure a large wheel housing and to secure a long cable and corrugated tube.

  As a result of intensive research conducted by the present inventor, when a plurality of cables are bundled tightly in the longitudinal direction by a corrugated tube, bending and extension points in the longitudinal direction of the cable are substantially fixed, and the inner empty cross section of the protective tube It has been found that bending fatigue of the cable is likely to occur in a specific cross sectional area and less likely to occur in other cross sectional areas. The small diameter signal cable through which low voltage and low current flows is easy to bend, and the large diameter power cable through which high voltage and high current flows is difficult to bend and bend, and it is in a specific cross sectional area that is susceptible to bending fatigue. To avoid bending fatigue of the power cable by arranging small diameter cables or other volumes or leaving the space as no space and arranging the power cable in other cross sectional area which is not susceptible to bending fatigue effect We came to invent a strategy.

For this purpose, the power line wiring structure of the in-wheel motor drive according to the first invention comprises an in-wheel motor drive capable of being steered about a steered axis and an in-wheel motor drive at a position away from the steered axis. The vehicle includes a plurality of power lines extending toward the vehicle body side and bent along with turning, and a protective tube which accommodates the plurality of power lines and is bent along with turning. Then , one end of the protective tube is fixed to the in-wheel motor drive device, the other end of the protective tube is fixed to the vehicle body side, and the inner empty cross section of the protective tube is a near cross sectional area near the steering axis A plurality of power lines are included in the near cross sectional area, including a far cross sectional area far from the axis. The power line wiring structure of the in-wheel motor drive according to the second invention extends from the in-wheel motor drive from the in-wheel motor drive to the vehicle body at a position away from the steer axis It is premised that a protective tube and a power line and a linear body which are accommodated in the protective tube and extend from the in-wheel motor drive to the vehicle body are provided. Then , one end of the protective tube is fixed to the in-wheel motor drive device, the other end of the protective tube is fixed to the vehicle body, and the power line is disposed at a position close to the steering axis within the protective tube It is characterized in that it is disposed at a position far from the steering axis.

As a result of intensive research conducted by the present inventor, it was found that the electrical cable was not damaged in the near cross-sectional area of the protective tube close to the steering axis, and the electrical cable in the far cross-sectional area of the protective tube far from the steered axis Damage is to occur. According to the first and second inventions described above, the large diameter power line which is relatively hard to bend and weak to bending fatigue is arranged in the near cross sectional area which is relatively hard to receive the effect of bending fatigue. Even if a plurality of power lines are bundled by a common protective tube, breakage of the power lines can be avoided. The protective tube is not particularly limited as long as it is flexible. The protective tube is, for example, a corrugated tube made of resin or a vinyl hose. Further, the in-wheel motor drive device may be a direct drive system which directly transmits the rotation of the motor. Alternatively, it may have a decelerating portion for decelerating the rotation of the motor and transmitting it to the wheel hub. The speed reducing portion may be a cycloid speed reducing mechanism, a general planetary gear set, or a parallel-biaxial gear set. The near cross section area means the side closer to the turning axis when the cross section is cut parallel to the turning axis, and the arrangement in the near section area means that all the power lines are not in the far section area. That is, part of the cross section of the power line may be in the near cross sectional area.

There are no particular limitations on the protection target that is disposed in the far cross-sectional area far from the steering axis and protected by the protection tube. For example, in one embodiment of the present invention, a linear body is disposed in the far cross sectional area. According to such an embodiment, since the filament which is relatively easy to bend and resistant to bending fatigue is arranged in the far cross-sectional area which is relatively susceptible to the effect of bending fatigue, the cable bundled with the protective tube Durability of the whole class is improved. The linear body may be, for example, a hollow hose or tube extending from the in-wheel motor drive, or may simply be a linear body for filling the inner space of the protective tube. The hose is smaller in diameter, smaller in bending radius, and more resistant to fatigue and fatigue than power lines because it is a simple flexible tube such as a rubber hose and a vinyl hose. In other embodiments, the far cross-sectional area may be padded. Alternatively, as another embodiment, a far cross-sectional area far from the steering axis may be left as space.

  In a preferred embodiment, the linear body is a signal line and / or a breather hose that extends from the in-wheel motor drive to the vehicle body side and bends with turning. A weaker current flows in the signal line than in the power line. Therefore, the power line is smaller in diameter, smaller in bending radius, and more resistant to fatigue and fatigue than the power line. As described above, the breather hose is highly resistant to fatigue and fatigue.

  The means for arranging a plurality of power lines in the near cross sectional area is not particularly limited. In one embodiment, it is preferable to further include a clamp that holds a plurality of power lines respectively and arranges them in the near cross sectional area. The clamps hold the respective power lines individually to maintain the positional relationship in the cross section of the protective tube. The shape of the clamp is, for example, a pillar of a lotus root shape or a rectangular parallelepiped having a plurality of through holes, but is not particularly limited. The clamp may be disposed at at least one end of both ends of the power line. Alternatively, a plurality of clamps may be arranged at intervals in the extension direction of the power line.

  As described above, according to the present invention, in a wiring structure in which a plurality of power lines are bundled and protected by a common protective tube, the power lines are damaged even if the in-wheel motor drive device is steered repeatedly tens of thousands of times. Power line breakage can be avoided. Therefore, it is advantageous for maintenance.

It is a general view showing the in-wheel motor drive which becomes one embodiment of the present invention, and expresses the state where it saw from the cross direction outside. It is a figure showing the embodiment, and expresses the state where it saw from the vehicles back. It is a whole top view which shows the embodiment. It is explanatory drawing which makes the corrugated tube in FIG. 3 a longitudinal cross-section, and shows it. It is explanatory drawing which makes a corrugated tube a longitudinal cross-section and shows it in a steering state. It is explanatory drawing which makes a corrugated tube a longitudinal cross-section and shows it in a steering state. It is a front view showing the arm cylinder part of the embodiment with a power line. It is a side view which shows the arm cylinder part of FIG. It is a disassembled front view which shows the arm cylinder part of FIG. 7, and a power wire. It is a perspective view which shows the clamp of the embodiment. It is a perspective view which shows the clamp of a 1st modification. It is a perspective view which shows the clamp of a 2nd modification. It is a front view showing a panel cylinder part of the embodiment with a power line. It is a top view which shows the panel cylindrical part of FIG. It is a disassembled front view which shows the panel cylindrical part of FIG. 13, and a power wire.

  Hereinafter, embodiments of the present invention will be described in detail based on the drawings. FIG. 1 is a view showing an in-wheel motor drive device according to an embodiment of the present invention, as viewed from the outside in the vehicle width direction. FIG. 2 is a view showing the embodiment, and shows a state viewed from the rear of the vehicle. FIG. 3 is an overall plan view showing the same embodiment. FIG. 4 is an explanatory view showing the corrugated tube in FIG. 3 in a longitudinal cross section, and shows a case where the turning angle is 0 °. FIG. 5 and FIG. 6 are explanatory views showing the corrugated tube in a longitudinal cross section, and show the case of steering in the left and right direction, respectively. The in-wheel motor drive device of this embodiment is provided in the inside of the wheel of an electric vehicle. This electric car is a passenger car and can travel at high speed on public roads like a general engine car.

  The in-wheel motor drive device 11 is provided with motor part 11A, the deceleration part 11B, and the hub part 11C, as shown in FIG. The motor unit 11A, the reduction unit 11B, and the hub unit 11C are sequentially arranged in series in the direction of the axis O of the hub wheel 12M, which is a rotating member of the hub unit 11C, and coaxially arranged. The in-wheel motor drive device 11 drives a wheel W (virtual line) disposed on the outer side (outboard side) of the vehicle in the vehicle width direction, and is provided in an inner empty area of the road wheel W1 of the wheel W. The hub portion 11C is disposed on the outboard side, and the motor portion 11A is disposed on the inner side in the vehicle width direction (inboard side). In addition, the wheel W is a front wheel of an electric vehicle, and steers around the steering axis (king pin) K with the in-wheel motor drive device 11.

  The motor portion 11A has a cylindrical casing, the reduction portion 11B has a cylindrical casing having the same outer diameter as the motor portion 11A on the outboard side of the motor portion 11A, and the hub portion 11C is out of the reduction portion 11B. It has a frusto-conical outer diameter outer ring member 12L which is tapered toward the board side. The casing and the outer ring member 12 </ b> L are non-rotating members forming an outer shell of the in-wheel motor drive device 11. On the other hand, the hub wheel 12M is a rotating member that protrudes from the outer ring member 12L to the outboard side. The shaft portion 12S of the hub wheel 12M penetrates the central hole of the outer ring member 12L, and is rotatably supported by the outer ring member 12L via a plurality of rolling elements. The road wheel W1 of the wheel W shown by an imaginary line is connected and fixed to the flange portion 12F extending in the outer diameter direction from the tip end of the shaft portion 12S by a plurality of bolts (not shown).

  The motor unit 11A incorporates a rotary electric machine in a casing, drives the hub wheel 12M of the hub unit 11C, or performs power regeneration using the rotation of the hub wheel 12M. The reduction gear unit 11B incorporates a reduction gear mechanism such as a cycloid reduction gear, for example, in the casing, and decelerates the rotation of the motor unit 11A and transmits it to the hub wheel 12M. The lower portion of the speed reduction unit 11B protrudes further to the outer diameter side than the casing of the motor unit 11A and the speed reduction unit 11B, and includes an oil tank 11R for storing oil. The reduction unit 11B may employ a reduction gear such as a planetary gear reduction gear or a parallel two-shaft reduction gear. Alternatively, the in-wheel motor drive device 11 may be a so-called direct motor type in-wheel motor drive device that does not employ a reduction gear.

  The hub portion 11C, which is relatively positioned on the outboard side, is disposed in the inner empty area of the cylindrical road wheel W1. On the other hand, the motor unit 11A, which is relatively located on the inboard side, protrudes from the inner empty area of the road wheel W1 to the inboard side. A plurality of power lines 26, signal lines 27, and a breather hose 28 which will be described later are connected to the motor unit 11A.

  A knuckle arm 13 extending upward from the casing of the speed reduction unit 11B is provided on the top of the speed reduction unit 11B as shown in FIG. As shown in FIG. 1, the root portion 13l of the knuckle arm 13 is disposed forward of the axis O (in front of the vehicle), and the root portion is integrally coupled with the casing of the reduction gear portion 11B. That is, the knuckle arm 13 is fixed to the casing of the speed reduction unit 11B. The tip end side of the knuckle arm 13 extends to the outer diameter side of the wheel W beyond the outer peripheral edge W2 of the wheel W as shown in FIG. The casings of the knuckle arm 13 and the reduction gear portion 11B are made of metal.

  The knuckle arm 13 extending in the outer diameter direction of the wheel W extends toward the inboard side as it goes upward from the root portion 13l as shown in FIG. 2 and avoids interference with the wheel W. On the other hand, the middle portion 13m of the knuckle arm 13 projects to the outboard side. Further, referring to FIG. 1, the knuckle arm 13 extends from the middle portion 13m to the rear side (referred to as the rear of the vehicle), straddles the axis O, and reaches the tip portion 13n. A tip region from the middle portion 13m to the tip portion 13n of the knuckle arm 13 is located on the outer diameter side of the outer peripheral edge W2 of the wheel W and extends in the front-rear direction facing the outer peripheral edge W2 of the wheel W.

  A tie rod of a steering device (not shown) is connected to the distal end portion 13 n via a ball joint. When a steering force is input from the steering device to the knuckle arm 13, the in-wheel motor drive device 11 steers in the left-right direction of the vehicle about the steered axis K extending in the vertical direction together with the wheel W (FIG. 5, FIG. 6). When the turning angle of the wheel W is 0 °, the axis O of the in-wheel motor drive device 11 extends in the vehicle width direction as shown in FIGS. Thus, the vehicle travels straight ahead.

  Next, a suspension device for suspending the in-wheel motor drive device 11 will be described.

  The middle portion 13m of the knuckle arm 13 located above the wheel W is connected via the ball joint 24 to the outboard side of the upper arm 22 extending in the vehicle width direction. The oil tank 11R of the in-wheel motor drive device 11 is connected to the outboard side of the lower arm 23 extending in the vehicle width direction via a ball joint (not shown). The inboard sides of the upper arm 22 and the lower arm 23 are connected to a vehicle body frame (not shown). The upper arm 22 disposed at the upper side and the lower arm 23 disposed at the lower side are suspension members of the double wishbone type suspension device, having the inboard end as a base end and the outboard end as a free end. It can swing up and down. Thereby, the in-wheel motor drive device 11 can be bound and rebound in the vertical direction together with the wheel W.

  A virtual straight line connecting the ball joint 24 provided at the outboard side end of the upper arm 22 and the ball joint provided at the outboard side end of the lower arm 23 constitutes a turning axis K. The in-wheel motor drive device 11, the knuckle arm 13, the upper arm 22, and the wheel W are accommodated in the wheel housing 25 which is a recessed part provided in the vehicle body, as shown in FIG.

  Next, the cables of the in-wheel motor drive device 11 will be described.

  As shown in FIG. 2, the present embodiment includes three power lines 26 wired in a wheel housing 26, one signal line 27, and one breather hose 28. The power line 26 is a flexible power cable in which a metallic stranded wire is coated with a non-conductor, and is a bendable strong electric wire. In this embodiment, in order to supply three-phase AC power from the vehicle body side to the motor unit 11A, three power lines 26 of U-phase, V-phase and W-phase are provided.

  The signal line 27 is a weak electric wire for transmitting a signal from a sensor incorporated in the in-wheel motor drive device 11 to the vehicle body side. Further, the signal line 27 is a flexible power cable in which a metallic stranded wire thinner than the metallic stranded wire of the power line 26 is covered with a non-conductive material and has a smaller diameter than the power line 26. It can be bent at a radius smaller than 26. The signal line 27 is more durable than the power line 26 in terms of fatigue and fatigue caused by repeated bending and stretching.

  The breather hose 28 is provided in order to bring the internal pressure of the in-wheel motor drive device 11 closer to the atmospheric pressure, and is a flexible hollow rubber hose. The breather hose 28 is more durable than the signal line 27 regarding fatigue and fatigue caused by repeated bending and stretching.

  The power line 26, the signal line 27, and the breather hose 28 are spaced apart from the steering axis K as shown in FIGS. 3 to 6 from the tip 13n of the knuckle arm 13 of the in-wheel motor drive device 11 to the vehicle body panel. It is bridged to 101 and is bent as the in-wheel motor drive device 11 is steered. Furthermore, the power line 26, the signal line 27, and the breather hose 28 are passed from the tip 13n to the cylindrical knuckle arm 13 and connected to the motor unit 11A of the in-wheel motor drive device 11.

  The power line 26, the signal line 27, and the breather hose 28 are sequentially passed through the panel cylindrical portion 31, the corrugated tube 41, and the arm cylindrical portion 51 between the vehicle body panel 101 and the tip 13n of the knuckle arm 13, It is shut off from the outside space. The power line 26, the signal line 27, and the breather hose 28 are covered by the knuckle arm 13 in a section extending along the knuckle arm 13, and cut off from the outer space. As a result, the power line 26, the signal line 27, and the breather hose 28 are physically protected from foreign matter such as flying pebbles over the entire length.

  FIG. 7 is a front view of the arm cylindrical portion 51 taken out and shown together with the power line 26, and shows the tip of the knuckle arm 13 shown in FIG. 2 in an enlarged manner. FIG. 8 is a side view showing the arm cylindrical portion 51 taken out. The arm cylindrical portion 51 is a hard metal member and includes a first semicylindrical portion 51a and a second semicylindrical portion 51b formed by dividing a cylindrical body into two. An arch portion 54 is formed continuously at one end of the first semi-cylindrical portion 51 a in the axial direction. The arch portion 54 has two leg portions 55, 55 continuous from both sides of the first half cylindrical portion 51a (see FIG. 7).

  The two semi-cylindrical portions constituting the arm cylindrical portion 51 are disassembled as shown in FIG. By inserting the power line 26, the signal line 27, and the breather hose 28 along the first half cylindrical portion 51a and the arch portion 54, and then fitting the second half cylindrical portion 51b to the first half cylindrical portion 51a, power can be obtained. The wire 26, the signal wire 27 and the breather hose 28 are passed through the arm cylinder 51. The arm cylinder 51 passed through these cables is fixedly attached to the knuckle arm 13 so as to couple the pair of legs 55, 55 to the tip 13n of the knuckle arm 13 (FIG. 2). The arch portion 54 is a protective member that covers the power line 26, the signal line 27, and the breather hose 28.

  As shown in FIGS. 3 to 6, the corrugated tube 41 is a flexible protective tube. Further, since the corrugated tube 41 is a bellows-like tube made of resin, it is flexible but has an appropriate shape-retaining property, and does not sink against the impact of the pebbles coming. The corrugated tube 41 has a cut extending from one end to the other end. When the corrugated tube 41 is elastically deformed so as to open the cut, the power line 26, the signal line 27, and the breather hose 28 are inserted into the corrugated tube 41 while extending from the vehicle body panel 101 to the knuckle arm 13. Can be Then, both ends of the corrugated tube 41 are inserted into the panel cylindrical portion 31 and the arm cylindrical portion 51 (FIGS. 3 to 6).

  With one end of the corrugated tube 41 inserted so as to cover the outer periphery of the arm cylindrical portion 51, a band 61 is wound around the outer peripheral surface of one end of the corrugated tube 41 as shown in FIG. The band 61 may be a known one, and is tightened and rotated by tightening and rotating a screw 62 attached to the band 61 to clamp one end outer peripheral surface of the corrugated tube 41. Thus, one end of the corrugated tube 41 is firmly fixed so as not to come out of the arm cylindrical portion 51.

  Similarly, with the other end of the corrugated tube 41 inserted so as to cover the outer periphery of the panel cylindrical portion 31, a band 61 is wound around the other outer peripheral surface of the corrugated tube 41 as shown in FIG. Thus, the other end of the corrugated tube 41 is firmly fixed so as not to come out of the panel cylindrical portion 31.

  As shown in FIG. 1, the panel cylindrical portion 31 is disposed rearward of the steering axis K and the arm cylindrical portion 51. Further, as shown in FIG. 3, the panel cylindrical portion 31 is disposed closer to the inboard than the arm cylindrical portion 51. Therefore, regardless of the magnitude of the turning angle, the power line 26, the signal line 27, the breather hose 28, and the corrugated tube 41 are wired away from the turning axis K as shown in FIGS.

  Referring back to FIG. 9, the arrangement of the power line 26, the signal line 27, and the breather hose 28 is held by a clamp 63 which is a rectangular block. FIG. 10 is a perspective view showing the clamp 63 taken out. The clamp 63 has three holes 64 through which the respective power lines 26 pass, one hole 65 through which the signal line 27 passes, and one hole 66 through which the breather hose 28 passes. These holes 64, 65, 66 are arranged parallel to one another. In the clamp 63, cut lines 67 extending from the side surfaces of the clamp 63 to the holes 64, 65, 66 are respectively formed.

  The clamp 63 is made of a material that can be elastically deformed, such as rubber or sponge. By temporarily widening the cut 67, the power line 26, the signal line 27, and the breather hose 28 can be easily passed through the holes 63, 64, 65. In the arch portion 54, a recess having a square cross-sectional shape corresponding to the shape of the clamp 63 is formed, and the clamp 63 is accommodated in the arch portion 54 while passing through cables and the like, and a pair of legs It intervenes between the parts 55 and 55. Since the clamp 63 is a rectangular parallelepiped, the clamp 63 is prevented from rotating in the arch portion 54, and as shown in FIG. 2, holds a plurality of power lines 26 inboard, and outboards the signal line 27 and the breather hose 28. Hold on the side.

  As shown by imaginary lines in FIG. 7, one end of the corrugated tube 41 is inserted into the arm cylindrical portion 51. The hollow cross section of the corrugated tube 41 includes a near cross section area Sa close to the turning axis K and a far cross section area Sb far from the turning axis K. The plurality of power lines 26 are disposed in the near cross section area Sa, and the signal line 27 and the breather hose 28 are disposed in the far section area Sb. The boundary line between the near cross sectional area Sa and the far cross sectional area Sb cuts the corrugated tube 41 at a virtual plane including the turning axis K, and represents the inner diameter (diameter) of the corrugated tube 41 in the cutting plane. The straight line extending in the perpendicular direction is divided into three equal parts, which intersect with the straight line in the central portion and extend parallel to the steering axis K.

  Here, the clamp 63 is not limited to the embodiment shown in FIG. For example, as in the first modified example shown in FIG. 11, a convex portion 68 may be provided on the side surface of the clamp 63, and a concave portion having a shape corresponding to the convex portion 68 may be provided in the arch portion 54. By providing the convex portion 68, the clamp 63 can be attached to the arch portion 54 in the correct posture. Therefore, the power line 26 can be correctly disposed in the near cross sectional area Sa. In addition, since the mounting direction is clear, the mounting is easy.

  Furthermore, the clamp 63 is not limited to the embodiment shown in FIG. For example, as in the second modification shown in FIG. 12, the clamp 63 is a pillar of a lotus root shape, a protrusion 69 is provided on the upper portion of the clamp 63, and a semi-cylindrical space for accommodating the clamp 63 in the arch portion 54 A recess having a shape corresponding to the protrusion 69 may be provided. By providing the ridges 69, the clamp 63 can be attached to the arch portion 54 in the correct posture. In addition, the protrusion 69 engages with the inner wall surface of the arch portion 54 to stop the clamp 63 from rotating. Therefore, the power line 26 can be correctly disposed in the near cross sectional area Sa. In addition, since the mounting direction is clear, the mounting is easy.

  The panel cylindrical portion 31 (FIG. 1) attached to the vehicle body panel 101 is also provided with a clamp for holding the arrangement of the power line 26, the signal line 27, and the breather hose 28. FIG. 13 is a front view showing the panel cylindrical portion 31 shown in FIG. 1 together with its peripheral parts. FIG. 14 is a plan view showing the panel cylindrical portion 31 together with its peripheral parts, and FIG. 15 is an exploded perspective view showing the panel cylindrical portion 31 and the peripheral parts. The panel cylindrical portion 31 is a hard metal member, and includes a first semicylindrical portion 31a and a second semicylindrical portion 31b formed by dividing a cylindrical body into two. A flange 33a is formed at the central portion of the first half cylindrical portion 31a, and a flange 33b is formed on the outer peripheral surface of the second half cylindrical portion 31b. A C-shaped connector 32 is attached and fixed to the back surface of the flanges 33a and 33b. Thereby, the first half cylindrical portion 31a and the second half cylindrical portion 31b maintain the cylindrical shape.

  The two semi-cylindrical portions constituting the panel cylindrical portion 31 are disassembled as shown in FIG. The power line 26, the signal line 27, and the breather hose are covered by covering the power line 26, the signal line 27, and the breather hose 28 with the first half cylindrical portion 31a and the second half cylindrical portion 31b from both sides in the radial direction. 28 is passed through the panel cylinder 31 (FIG. 13). The power line 26, the signal line 27, and the breather hose 28 are maintained in the arrangement by the clamp 63 described above.

  The outer periphery of the clamp 63 is tapered, and a flange 70 is formed at the large diameter end. The flange portion 70 is flush with one end surface of the lotus root clamp 63. An annular recess 37 for receiving the flange portion 70 and a cylindrical portion 38 extending in one axial direction are formed on the inner periphery of the C-shaped connector 32. The small diameter end of the clamp 63 is inserted into the cylindrical portion 38 while passing through the cables, and the flange portion 70 of the clamp 63 is axially clamped by the flanges 33 a and 33 b and the connector 32. Is tightened to the inner peripheral surface of the cylindrical portion 38 by the wedge action of the taper. As a result, the clamp 63 is connected and fixed to the panel cylindrical portion 31 while being prevented from rotating.

  Through holes 35 are formed at predetermined intervals in the circumferential direction in the flanges 33a and 33b, and female screw holes 34 are also formed at predetermined intervals in the circumferential direction in the connector 32 which is a C-shaped annular disc. Bolts 36 are respectively inserted into the through holes 35 of the flanges 33a and 33b from the side opposite to the connector, and the bolts 36 are screwed into the female screw holes 34 of the connector 32 respectively. Thereby, attachment fixation of clamp 63 and connecting tool 32 to panel cylinder part 31 is realized.

  The panel cylindrical portion 31 passed through the cables is fixed to the vehicle body panel 101. The vehicle body panel 101 is a vehicle body side member attached and fixed to a vehicle body frame (not shown). Specifically, notches 39 are formed at predetermined intervals in the circumferential direction on the flanges 33a and 33b, and through holes 40 are formed at predetermined intervals in the circumferential direction in the connector 32 which is a C-shaped annular disc. As described above, by attaching and fixing the connector 32 to the flanges 33a and 33b, the respective notches 39 coincide with the respective through holes 40. When fixing the panel cylindrical portion 31 and the cables to the vehicle body panel 101, the tubular portion 38 of the connector 32 and the cables are passed from the surface side of the vehicle body panel 101 through the lower hole formed in advance in the vehicle body panel 101 With the tool 32 in contact with the surface of the vehicle body panel 101, a bolt (not shown) is inserted from the surface side into the through hole 40, and each bolt is screwed into a female screw hole (not shown) of the vehicle body panel 101. The other end of the corrugated tube 41 is inserted into the panel cylindrical portion 31 through which cables are passed (FIG. 4). The corrugated tube 41 accommodates and extends a plurality of power lines 26 as shown in FIGS. 4 to 6, and bends along with the turning of the in-wheel motor drive device 11.

  As shown by phantom lines in FIG. 13, the other end of the corrugated tube 41 is inserted into the panel cylindrical portion 31. The hollow cross section of the corrugated tube 41 includes a near cross section area Sa close to the turning axis K and a far cross section area Sb far from the turning axis K. The plurality of power lines 26 are disposed in the near cross section area Sa, and the signal line 27 and the breather hose 28 are disposed in the far section area Sb.

  According to the present embodiment, since the clamp 63 for holding the arrangement of the cables is provided, as shown in FIGS. 4 to 6, the power line 26 to be the large diameter cable is arranged on the inner diameter side with respect to the steering axis K The signal wire 27 and the breather hose 28 which become small diameter cables are disposed on the inner diameter side with respect to the turning axis K. Further, as shown in FIGS. 7 and 13, the hollow cross section of the corrugated tube 41 disposed apart from the steering axis K is a near cross section area Sa close to the steering axis K and a far cross section distant from the steering axis K The region Sb is included. A plurality of power lines 26 are disposed in the near cross-sectional area Sa. The near cross section area Sa is closer to the steering axis K than the far cross section area Sb. For this reason, even if the corrugated tube 41 bends and extends around the turning axis K, the fatigue and fatigue acting on the cable disposed in the near cross sectional area Sa is relatively small, and acts on the cable disposed in the distant cross sectional area Sb Fatigue Fatigue is relatively large.

  Therefore, according to the present embodiment, the power wire 26 which is a large diameter cable is more difficult to bend than the signal wire 27 which is a small diameter cable, and is disposed relatively close to the cross section area Sa even though it is relatively weak against fatigue and fatigue. The fatigue and fatigue of the driven power line 26 are relatively reduced, and the durability is improved.

  Further, according to the present embodiment, since the signal line 27 as a linear body and the breather hose 28 are disposed in the far cross-sectional area Sb, the fatigue and fatigue acting on the cables disposed in the far cross-sectional area Sb are relative. However, it is possible to overcome fatigue and fatigue with relatively large signal lines 27 and breather hoses 28 against fatigue and fatigue.

  Further, according to the present embodiment, the power line 26 is further held in the near cross sectional area Sa by gripping the plurality of power lines 26 respectively, and thus the power cross 26 is held in the near cross sectional area Sa. Even after long-term operation of drive device 11, power line 26 does not deviate from near cross-sectional area Sa. As another embodiment, even if the clamp 63 is not provided, if the signal line 27 and the breather hose 28 are held in the far cross section area Sb, as a result, the power line 26 is held in the near cross section area Sa. it can.

  Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiment within the same or equivalent scope of the present invention.

  The power line wiring structure of the in-wheel motor drive according to the present invention is advantageously used in electric vehicles and hybrid vehicles.

11 in-wheel motor drive, 13 knuckle arm,
13l root, 13m middle, 13n tip,
22 upper arms, 23 lower arms,
24 ball joints, 25 wheel housings,
26 power lines, 27 signal lines, 28 breather hoses,
31 panel cylindrical portion, 31a first semi-cylindrical portion,
31b second half cylinder, 32 couplers,
33, 33a, 33b flange 41 corrugated tube,
51 arm cylinder, 54 arches, 55 legs,
61 bands, 63 clamps, 67 cuts,
68 projections, 69 projections, 101 body panels,
K steering axis, Sa near cross section, Sb far cross section,
W wheel.

Claims (4)

An in-wheel motor drive that can be steered around the steering axis;
Extends from the in-wheel motor drive to the vehicle side at a position away from the steering axis,
A plurality of power lines that bend along with the steering;
And a protective tube that accommodates and extends the plurality of power lines and bends along with the steering;
One end of the protective tube is fixed to the in-wheel motor drive device,
The other end of the protective tube is fixed to the vehicle body side,
The inner empty cross section of the protective tube includes a near cross section area near the steering axis and a far cross section area far from the steering axis,
The power line wiring structure of an in-wheel motor drive device, wherein the plurality of power lines are arranged in the near cross sectional area.   The in-wheel motor drive according to claim 1, wherein a signal line and / or a breather hose extending from the in-wheel motor drive to the vehicle body side and bending along with the turning are disposed in the far cross-sectional area. Power wire wiring structure.   The power line wiring structure of the in-wheel motor drive according to claim 1, further comprising a clamp that holds the plurality of power lines and arranges them in the near cross sectional area. An in-wheel motor drive that can be steered around the steering axis;
A protective tube extending from the in-wheel motor drive to the vehicle body at a position away from the steering axis;
A power line and a linear body housed in the protective tube and extending from the in-wheel motor drive to the vehicle body;
One end of the protective tube is fixed to the in-wheel motor drive device,
The other end of the protective tube is fixed to the vehicle body,
In the in-wheel motor drive device, the power line is disposed at a position close to the steering axis and the linear body is disposed at a position distant from the steering axis within the protective tube. Power line wiring structure.

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