JP5407581B2 - In-wheel motor - Google Patents

Description

  The present invention relates to an in-wheel motor disposed inside a wheel constituting a driving wheel of a vehicle, and more particularly to a connection structure of a power feeding cable for supplying electric power to the motor.

  Development of an in-wheel motor in which a motor is arranged inside a wheel constituting a driving wheel of a vehicle and electric power is supplied from an inverter to control the rotational speed has been advanced. If an in-wheel motor is put into practical use, a conventional power train that combines a transmission, a differential device, a transmission shaft and the like becomes unnecessary, and the vehicle structure changes drastically and technological innovation advances. Recently, various electric cars equipped with in-wheel motors have been prototyped and exhibited in many exhibitions.

  The applicant of the present application discloses an electric wheel equipped with this type of in-wheel motor in Patent Document 1. The electric wheel of Patent Document 1 includes a wheel, an in-wheel motor, and a power supply cable. The in-wheel motor includes a casing, a rotating electric machine, and a terminal box, and the power supply cable is connected to the terminal box from the downstream side in the rotation direction of the wheel. It is characterized by being. According to the present invention, when a foreign object such as ice enters the inside of the wheel, the foreign object collides with the terminal box before the power supply cable and is crushed. Arise.

  The in-wheel motor is not limited to Patent Document 1, and the in-wheel motor has a large output torque, the rotation speed can be easily controlled, the rotation direction can be switched, and further, a three-phase motor, particularly a rotating electric machine capable of energy regeneration during braking, Three-phase synchronous motors are frequently used. In general, power is supplied to the three-phase motor using an in-vehicle battery as a power source via an inverter and a power supply cable, and a normal terminal box is provided as a cable lead-in portion on the motor side. The in-wheel motor generally includes a brake device and a speed reduction mechanism, and is generally supported by an arm so as to be steerable and swingable.

JP 2009-96429 A

  By the way, the terminal box is provided in a part of the outer periphery of the substantially cylindrical casing so as to protrude in a rectangular box shape, and the three-phase power supply cables are generally arranged in a line and drawn into the terminal box and connected. . The power supply cable has a core wire and a shield braid, and a terminal for terminating the core wire and a bracket for grounding the shield braid are arranged at the terminal portion. The bracket is larger than the cross-sectional dimension of the terminal portion, and there is a problem in that the size of the terminal box increases because three brackets are arranged in a row. In-wheel motors require not only a three-phase motor but also a braking device and a speed reduction mechanism in a limited space inside the wheel. In addition, the wheel can be steered and swung on the center side of the vehicle. For this reason, the increase in the size of the terminal box has been a major limitation in construction because members such as tie rods and stabilizer links are provided. Further, since the three brackets are arranged close to each other, the fixing work is not easy.

  The present invention has been made in view of the above problems, and the size of the cable lead-in portion for drawing and connecting the three-phase power feeding cable is small so that there is no possibility of interference with other parts. It is an object to be solved to provide an in-wheel motor that can be easily connected and fixed with a bracket.

The invention of an in-wheel motor according to claim 1 that solves the above-described problem includes a casing that rotatably supports a wheel that constitutes a driving wheel of a vehicle, and a three-wheel arrangement that is disposed inside the casing and rotationally drives the wheel. An in-wheel motor comprising a phase motor and a three-phase power supply cable for supplying power to the three-phase motor, wherein the casing draws and fixes three end portions of the three-phase power supply cable Having a cable lead-in portion, the first phase and the third phase end portions being arranged in parallel with the rotation axis of the wheel at an interval shorter than the cross-sectional dimension of the second phase end portion, wherein are triangular arrangement in the first phase and the terminal portion of the third phase displaced by a displacement dimension to the axis of rotation a direction perpendicular to terminate each of the terminal portion of the feeder cable of the three-phase core The cable lead-in part of the casing has a terminal block having a terminal receiving part for connecting the terminals of the terminal part of the three-phase power feeding cable, respectively, and the three-phase three-phase arranged A bus bar for connecting the terminal receiving portion and each phase coil connecting screw of the three-phase motor arranged in a row while absorbing the displacement dimension is provided inside the terminal block .

  In addition, the description of a 1st phase-a 3rd phase is for demonstrating the structural arrangement | sequence order, and does not limit an electrical phase order.

The invention according to claim 2 is the invention according to claim 1, wherein the arrangement of the three-phase terminal receiving portions and the arrangement of the respective phase coil connection screws are arranged at an angle of 90 °, The first phase is bent 90 ° in the middle, the second phase is bent 90 ° in the middle and has a step corresponding to the displacement dimension, and is omitted in the third phase .

  According to a third aspect of the present invention, in the second aspect, the terminal block is provided on the outer periphery of the stator of the three-phase motor, and the three-phase motor of the three-phase motor led to the outer periphery of the stator by the terminal block. An external terminal and the terminal of the three-phase power feeding cable are connected to each other.

According to a fourth aspect of the present invention, in the second or third aspect, each of the terminal portions of the three-phase power supply cable has a bracket for grounding a shield braid, and the cable lead-in portion of the casing has a three-phase structure. There are bracket fixing portions for fixing the brackets of the terminal portion of the power supply cable, respectively, and the bracket fixing portions of the first phase and the third phase are respectively rotated from the power supply cables of the first phase and the third phase. Disposed in a direction away from the second phase at right angles to the axis, the bracket fixing portion of the second phase moves away from the first phase and the third phase at right angles to the rotational axis from the feeding cable of the second phase It is characterized by being displaced in the opposite direction.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the cable lead-in portion is disposed adjacent to a brake rotor provided integrally with the wheel. .

In the invention which concerns on Claim 1 and 2 , in the cable lead-in part which draws and fixes three terminal parts of a three-phase electric power feeding cable, the terminal part of a 1st phase and a 3rd phase is a cross section of the terminal part of a 2nd phase The second phase end portions are disposed in parallel with the rotation axis of the wheel at intervals shorter than the dimensions, and the second phase end portions are displaced from the first phase and third phase end portions in a direction perpendicular to the rotation axis and are arranged in a triangle . That is, by displacing the terminal portion of the second phase, the terminal portions of the first phase and the third phase can be placed close to each other. On the other hand, in the conventional power supply cable, the three terminal portions are arranged in a row parallel to the rotation axis, and between the first phase and the second phase and between the second phase and the third phase. A predetermined interphase spacing is provided.

Furthermore, it has a terminal on the core wire of the terminal part of the power supply cable, a terminal block in the cable lead-in part, the first phase and third phase terminals are arranged parallel to the rotation axis, and the second phase terminal is The first phase and third phase terminals are arranged in a triangle with a displacement dimension in a direction perpendicular to the rotation axis. Further, the displacement dimension can be absorbed in the terminal block by connecting the terminal receiving portions arranged in a triangle and the respective phase coil connecting screws of the three-phase motor arranged in a row with a bus bar. Thereby, the terminal part of a 1st phase and a 3rd phase can be made to approach, and the dimension of the rotation axis direction of a cable drawing-in part can be reduced.

  In the invention which concerns on Claim 3, a terminal block is provided in the outer periphery of the stator of a three-phase motor, and the external terminal of a three-phase motor and the terminal of an electric power feeding cable are each connected. Therefore, the connection structure from the power supply cable to the three-phase motor can be simplified and made compact, and the connection work is facilitated.

In the invention which concerns on Claim 4, in the aspect which has a bracket which earth | grounds a shield knitting element in the terminal part of an electric power feeding cable, and has a bracket fixing | fixed part in a cable drawing-in part, the bracket fixing | fixed part of a 1st phase and a 3rd phase respectively The second phase bracket fixing part is perpendicular to the rotation axis from the second phase feeding cable , and is arranged to be displaced from the first phase and the third phase feeding cable at a right angle to the rotation axis and away from the second phase. Are displaced in opposite directions away from the first phase and the third phase. As a result, the first-phase and third-phase brackets and the second-phase brackets are fixed in opposite directions. On the other hand, in the conventional power feeding cable, the three-phase brackets are arranged in a line and arranged in the same direction, and the three-phase bracket fixing portions are close to each other. According to the present invention, the size of three brackets is not required in the direction of the rotation axis, and the size of the cable lead-in portion in the direction of the rotation axis can be reduced as compared with the conventional case. In addition, since the three-phase bracket fixing portions are spaced apart from each other, the bracket fixing operation can be easily performed.

  In the invention which concerns on Claim 5, a cable drawing-in part is arrange | positioned adjacent to the brake rotor integrally provided in the wheel. Here, since the size of the cable drawing portion is reduced in the rotation axis direction, there is no possibility of interference with the brake rotor, and the degree of freedom in arrangement of the cable drawing portion and the brake device is large.

It is a front view of the in-wheel motor of an embodiment of the present invention. It is a perspective view of the in-wheel motor of embodiment of FIG. It is a side view of the in-wheel motor seen from the arrow A direction of FIG. It is a figure explaining the structure of the terminal part of the electric power feeding cable in FIGS. In FIGS. 1-3, it is a top view explaining the arrangement | positioning of the three terminal parts of a three-phase electric power feeding cable, and the fixing method of a bracket. It is a figure explaining the connection structure in the terminal box seen from the arrow A direction of FIG. It is a perspective view of the conventional in-wheel motor. In FIG. 7, it is a top view explaining the arrangement | positioning of the terminal part of the conventional electric power feeding cable, and the fixing method of a bracket.

  The form for implementing this invention is demonstrated with reference to FIGS. FIG. 1 is a front view of an in-wheel motor according to an embodiment of the present invention, and FIG. 2 is a perspective view thereof. FIG. 3 is a side view of the in-wheel motor viewed from the direction of arrow A in FIG. 1 corresponds to the front side of the vehicle and the back side of the page corresponds to the rear side, and the vertical direction of the plane of the paper substantially coincides with the vertical direction of the vehicle.

  As shown in FIG. 1, the in-wheel motor 1 of the embodiment is a device that is provided in a disc wheel 9 that constitutes a driving front wheel of a front-wheel drive vehicle, and that drives the disc wheel 9 to rotate about a rotation axis CL. is there. As shown in FIGS. 2 and 3, the in-wheel motor 1 includes a casing 2, a three-phase motor 4, a three-phase power supply cable 5 U, 5 V, and 5 W.

  The casing 2 is formed in a substantially cylindrical shape by sharing the disc wheel 9 and the rotation axis CL. An upper supported portion 21 is formed at the upper center of the casing 2, and lower supported portions 22 and 23 are formed at two lower portions. The upper supported portion 21 and the lower supported portions 22 and 23 are connected to the front suspension by a joint member or an arm member (not shown). Thus, the in-wheel motor 1 is supported so as to be steerable and swingable. Further, after the three-phase motor 4 is assembled inside one end side of the rotation axis CL of the casing 2 (right side in the drawing of FIG. 2), the cover 24 is fixed with ten bolts having a symbol. Further, a substantially rectangular terminal box 3 protrudes from the front side of the casing 2 in FIG. The terminal box 3 communicates with the inside of the casing 2 on the back side of the sheet of FIG. 1, and a cover (not shown) is fixed at six points on the front side of the sheet to be sealed. Further, as will be described later, three-phase power supply cables 5U, 5V, and 5W are drawn into the terminal box 3 from the upper surface thereof, and the terminal box 3 corresponds to a cable drawing portion.

  The three-phase motor 4 shares the rotation axis CL with the casing 2 and the disc wheel 9 and is disposed inside the casing 2. The three-phase motor 4 is a general three-phase synchronous motor, and has a stator 41 and a rotor 42 as shown in FIG. 3 with the cover 24 of the casing 2 removed. The stator 41 is substantially cylindrical, and although not shown in the figure, a plurality of stator coils are arranged in the circumferential direction, and are fixed to the casing 2 by four fixing holes 411 to 414. A motor-side terminal block 45 is disposed on the outer periphery of the stator 41 and inside the terminal box 3. In the motor-side terminal block 45, the conductor ends derived from the plurality of stator coils are collected into three-phase coil terminals. Further, the rotor 42 is rotatably disposed with a slight gap on the inner peripheral side of the stator 41.

  The output shaft 43 on the rotation axis CL of the rotor 42 is coupled to the input side of a reduction mechanism (not shown) on the back side (left side in FIG. 1) of FIG. The output side of the speed reduction mechanism is coupled to the disk rotor 91. A brake rotor 92 is provided on the outer peripheral side of the disc rotor 91, and the brake rotor 92 can be frictionally braked by a brake pad (not shown) disposed on the casing 2 side. A disc wheel 9 is fixed to the left side of the disc rotor 91 in FIG. 1, and the disc wheel 9 covers the in-wheel motor 1. A tire (not shown) is mounted on the outer peripheral side of the disc wheel 9 to form a driving front wheel.

  The three-phase power supply cables 5U, 5V, and 5W supply three-phase AC power from the battery to the three-phase motor 4 via an inverter. One ends of the power supply cables 5U, 5V, and 5W are connected to the inverter, and terminal portions 51U, 51V, and 51W are formed at the other ends, and are drawn into the terminal box 3 and connected.

  Here, since the phase terminal portions 51U, 51V, 51W of the three-phase power supply cables 5U, 5V, 5W have the same shape, the U-phase terminal portion 51U will be described with reference to FIG. FIGS. 4A and 4B are diagrams for explaining the structure of the terminal portion 51U of the power feeding cable 5U in FIGS. 1 to 3, (1) a plan view, (2) a front view, and (3) a view from the cable side. The U-phase terminal portion 51U includes a U-phase terminal 52U, a U-phase bracket 54U, a U-phase resin molded body 56U, a U-phase O-ring 59U, and the like. The U-phase terminal 52U is a member that terminates the core wire of the U-phase power supply cable 5U, and is formed by providing a connection hole 53U in a metal plate material. The U-phase terminal 52U is disposed in parallel to the axis AX at a distance of the eccentric dimension X1 from the axis AX of the U-phase power supply cable 5U. The U-phase bracket 54U is a member for grounding a shield braid having a reference sign, and is formed by providing a fixing hole 55U in a metal plate material. The U-phase bracket 54U is disposed so as to be orthogonal to the axis AX, and the fixing hole 55U is fixed at a position away from the axis AX.

  The U-phase resin molded body 56U is formed by a molding process using a resin after the connecting process of the core wire and the terminal 52U and the connecting process of the shield braid and the bracket 54U are performed. The U-phase resin molded body 56U stably holds the terminal 52U and the bracket 54U and their connection processing locations. The U-phase resin molded body 56U is formed long in the direction of the axis AX, and a U-phase power supply cable 5U is disposed at one end and a U-phase terminal 52U is disposed at the other end. A U-phase bracket 54U is disposed in an intermediate portion 57U having the thickest outer diameter D1 of the U-phase resin molded body 56U. Further, a seal groove 58U is formed in the circumferential direction in the intermediate portion 57U. A U-phase O-ring 59U is fitted in the seal groove 58U.

  Next, a connection structure from the power supply cables 5U, 5V, 5W to the three-phase motor 4 will be described in detail. In FIG. 2, a lead-in hole having a symbol is formed on the upper surface of the terminal box 3 so as to communicate between the inside and the outside, and the phase terminal portions 51U, 51V, 51W of the power supply cables 5U, 5V, 5W are respectively connected to the intermediate portions 57U, 57V. , 57W has been drawn. The O-ring 59U described in FIG. 4 is pressed against the inner peripheral surface of the drawing hole to ensure water tightness. The three terminal portions 51U, 51V, 51W are arranged as shown in the plan view of FIG. 5 when the terminal box 3 is looked down from above. FIG. 5 is a plan view for explaining the arrangement of the respective phase terminal portions 51U, 51V, 51W of the three-phase power supply cables 5U, 5V, 5W and the fixing method of the brackets 54U, 54V, 54W in FIGS. . Specifically, the U-phase terminal portion 51U and the W-phase terminal portion 51W are arranged in parallel with the rotation axis CL at a gap G1 shorter than the outer diameter D1 of the V-phase terminal portion 51V. On the other hand, the V-phase terminal portion 51V is displaced from the U-phase terminal portion 51U and the W-phase terminal portion 51W in a direction perpendicular to the rotation axis CL (the back side in FIG. 1, the right side in FIG. 3, the upper side in FIG. 5). They are displaced by X2.

  Further, the brackets 54U, 54V, 54W of the phase terminal portions 51U, 51V, 51W are in contact with the upper surface of the terminal box 3. The U-phase bracket 54U and the W-phase bracket 54W are respectively arranged in the direction away from the V-phase (downward in FIG. 5) perpendicular to the rotation axis CL from the U-phase power supply cable 5U and the W-phase power supply cable 5W. The V-phase bracket 54V is disposed in the opposite direction (upward in FIG. 5) away from the U-phase and the W-phase at a right angle to the rotation axis CL from the V-phase power supply cable 5V. Thereby, the fixing holes 55U, 55V, and 55W of the phase brackets 54U, 54V, and 54W are spaced apart.

  On the upper surface of the terminal box 3 corresponding to the positions of the fixing holes 55U, 55V, 55W, fixing holes (not shown) in which female screws are screwed are formed. Bolts 31U, 31V, 31W having male threads pass through the fixing holes 55U, 55V, 55W of the respective phase brackets 54U, 54V, 54W and then screw into the mounting holes. As a result, the shield braid is grounded in each phase, and the phase terminal portions 51U, 51V, 51W are fixed. That is, each phase bracket 54U, 54V, 54W serves as an electrical grounding material and a structural fixing material. The bolts 31U, 31V, 31W and the fixing holes on the terminal box 3 side correspond to bracket fixing portions.

  A terminal block 32 made of an insulating resin material is fixed inside the terminal box 3. The terminal block 32 faces each phase terminal portion 51U, 51V, 51W from below and is disposed so as to overlap the outer peripheral side of the motor-side terminal block 45 described above. As shown in FIGS. 1 and 2, the U-phase cable connection screw 33U, the V-phase cable connection screw 33V, and the W-phase coil connection screw 34W, which are terminal receiving portions, are arranged at the same height in the terminal block 32. Has been. The U-phase and V-phase cable connection screws 33U and 33V pass through the connection holes 53U (the V-phase is omitted) of the terminals 52U and 52V of the drawn U-phase and V-phase terminal portions 51U and 51V. The screw hole formed in the screw 32 is screwed. Further, the W-phase coil connection screw 34W passes through the connection hole of the terminal 52W of the drawn W-phase terminal portion 51W, and then reaches and is fixed to the motor side terminal block 45 as will be described later.

Here, the U-phase terminal 52U and the W-phase terminal 52W are arranged in parallel with the rotation axis CL. On the other hand, as shown in FIG. 3, the V-phase terminal 52V is displaced from the U-phase terminal 52U and the W-phase terminal 52W by a displacement dimension X3 in a direction perpendicular to the rotation axis CL, and is arranged in a triangle . The displacement dimension X3 is a dimension obtained by subtracting twice the eccentric dimension X1 of the terminal 52U shown in FIG. 4 from the displacement dimension X2 with respect to the U phase and W phase of the V-phase terminal portion 51V. The V-phase cable connection screw 33V and the screw hole are arranged on the back side in FIG. 1 from the U-phase and the W-phase by this displacement dimension X3.

  Further, in the terminal block 32, a V-phase coil connection screw 34V is disposed below the W-phase coil connection screw 34W, and a U-phase coil connection screw 34U is further disposed below the V-phase coil connection screw 34W. Between the U-phase coil connection screw 34U and the U-phase cable connection screw 33U, a U-phase bus bar 35U that is bent by 90 ° in the middle is disposed and electrically connected. Between the V-phase coil connection screw 34V and the V-phase cable connection screw 33V, a V-phase bus bar 35V that is bent 90 ° in the middle and has a step by a displacement dimension X3 is disposed and electrically connected. ing. The respective phase coil connection screws 34U, 34V, 34W are arranged horizontally in the vertical direction, and are electrically connected to the coil terminals of the respective phases of the motor side terminal block 45 on the back side in FIG. Since the connection structure using each phase coil connection screw 34U, 34V, 34W is substantially the same in three phases, the U phase will be described with reference to FIG.

  FIG. 6 is a diagram illustrating a connection structure in the terminal box 3 as viewed from the direction of arrow A in FIG. The motor-side terminal block 45 is formed of an insulating resin material, and three-phase screw accommodation holes 46U are formed in the horizontal direction on the left end surface thereof in the vertical direction. The three-phase screw housing hole 46U has a stepped bag shape that does not penetrate the motor-side terminal block 45 and has a diameter difference. In the large diameter portion of each phase screw accommodation hole 46U, each phase attachment nut 47U made of metal that is screwed with each phase coil connection screw 34U is fixed by insert molding. A substantially annular phase coil terminal 48U is disposed in contact with one surface side (left side in FIG. 5) of each phase mounting nut 47U. In addition, a pair of upper and lower U-shaped cross-sectional slots 49 are formed at two positions in the vertical direction on the left end surface of the motor-side terminal block 45.

  On the other hand, as shown in the figure, a pair of upper and lower partition plates 36 are provided so as to protrude from the right end surface of the terminal block 32. When the partition plate 36 is fitted into the slot 49, the terminal block 32 and the motor side terminal block 45 are coupled. Further, three-phase collar holding holes 37U are formed through the left and right sides of the terminal block 32 in the drawing, and each phase collar holding hole 37U faces each phase screw accommodation hole 46U of the motor side terminal block 45. It has become. A substantially cylindrical phase collar 38U is disposed in contact with each phase coil terminal 48U inside each phase collar holding hole 37U. The length of each phase collar 38U is slightly shorter than each phase collar holding hole 37U, and the inner diameter of each phase collar 38U is larger than the outer diameter of the thread portion of each phase coil connecting screw 34U. Each phase collar 38U is formed by using a copper alloy, which is a conductive metal, as a base material and tin plating the surface thereof.

  In FIG. 5, a U-phase bus bar 35U and a height adjusting spacer washer 39U are arranged on the left end surface of the U-phase collar 38U. Then, a U-phase coil connection screw 34U is inserted from the left side in the drawing, passed through the spacer washer 39U, the U-phase bus bar 35U, the inside of the U-phase collar 38U, the U-phase coil terminal 48U, and the U-phase mounting nut 47U. Screw in and fix. Then, between the U-phase bus bar 35U and the U-phase collar 38U, and between the U-phase collar 38U and the U-phase coil terminal 48U, the power feeding path is secured. In the V phase, a power feeding path from the V phase bus bar 35V to the V phase coil terminal is secured. In the W phase, the terminal 52W of the W phase power supply cable 5W is directly pressed against the W phase collar, and a power supply path reaching the W phase coil terminal without passing through the bus bar is secured. In FIG. 5, a partition wall 321 is erected between the left phases of the terminal block 32. Thereby, a space distance and a creepage distance are ensured, and insulation is performed reliably.

  With the connection structure described above, the three-phase AC power is supplied from the feed cables 5U, 5V, and 5W to the stator 41 of the three-phase motor 4 via the terminal block 32 and the motor-side terminal block 45 inside the terminal box 3. The

  Next, the effect of the in-wheel motor 1 of the embodiment will be described in comparison with the conventional apparatus illustrated in FIGS. 7 and 8. FIG. 7 is a perspective view for explaining a conventional in-wheel motor 8. FIG. 8 shows the arrangement of the phase terminal portions 51U, 51V, 51W of the power supply cables 5U, 5V, 5W and the fixing method of the brackets 54U, 54V, 54W. FIG. In FIG. 7, lead-in holes with reference numerals on the upper surface of the terminal box 30 are formed in a line, and the phase terminal portions 51U, 51V, 51W of the three-phase power supply cables 5U, 5V, 5W are also arranged in a line. . Accordingly, the minimum dimension of the terminal box 30 in the direction of the rotation axis CL is a dimension obtained by adding three times the interphase spacing to three times the outer diameter D1 of the terminal portion 51U of the power feeding cable. On the other hand, the minimum dimension of the terminal box 3 of the embodiment is a dimension obtained by adding a gap G1 to twice the outer diameter D1 of the terminal portion 51U, as shown in FIG. 4, and more than three times the outer diameter D1. small. Therefore, according to this embodiment, the dimension of the terminal box 3 in the direction of the rotation axis CL can be reduced as compared with the conventional case.

  Further, in FIG. 7, in order to reduce the dimension of the terminal box 30 in the direction of the rotation axis CL, an attempt was made to incline the three-phase terminal portions 51U, 51V, 51W. Was not preferable because it interfered with the brake rotor 92. In this embodiment, the possibility of such interference is eliminated, and the degree of freedom in arrangement is great, and the effect is clear.

  Moreover, in this embodiment, the location where connection work is required among the connection structures from the power supply cables 5U, 5V, 5W to the three-phase motor 4 is gathered inside the terminal box 3 to be simplified and compact. In addition, the connection work can be easily performed with the cover 24 of the casing 2 and the cover of the terminal block 3 being opened.

  Furthermore, in the conventional apparatus, as shown in FIG. 8, since the three-phase brackets 54U, 54V, 54W are fixed in the same direction, the fixing bolts 31U, 31V, 31W are arranged close to each other for fixing work by tightening. I had a hard time. In the present embodiment, as shown in FIG. 5, the V-phase bracket is fixed in the opposite direction, so that the fixing bolts 31U, 31V, 31W are spaced apart from each other. Therefore, the work of fixing the brackets 54U, 54V, 54W by tightening the bolts 31U, 31V, 31W can be easily performed.

  In the present embodiment, the V-phase terminal portion 51V arranged at the center of the three phases is displaced in a direction perpendicular to the rotation axis CL, but the phase to be displaced is a U phase or a W phase arranged at the end. There may be. Various other applications are possible.

1: In-wheel motor of embodiment of the present invention 2: Casing 21: Upper supported portion 22, 23: Lower supported portion 24: Cover 3, 30: Terminal box (cable lead-in portion)
31U, 31V, 31W: Bolt (cable fixing part)
32: Terminal block 33U, 33V: U phase, V phase cable connection screw 34U, 34V, 34W: U phase, V phase, W phase coil connection screw 35U, 35V: U phase, V phase bus bar 38U: U phase collar 4 : Three-phase motor 41: Stator 42: Rotor 43: Output shaft
45: Motor side terminal block 48U: U phase coil terminal 5U, 5V, 5W: U phase, V phase, W phase power supply cable 51U, 51V, 51W: U phase, V phase, W phase terminal section 52U, 52V, 52W: U phase, V phase, W phase terminal 54U, 54V, 54W: U phase, V phase, W phase bracket 8: Conventional in-wheel motor 9: Disc wheel 91: Disc rotor 92: Brake rotor D1; X1: Eccentric dimension of the terminal X2: Displacement dimension of the V-phase terminal X3: Displacement dimension of the V-phase terminal CL: Rotating axis of the disc wheel AX: Axis of the feeding cable

Claims (5)

A casing that rotatably supports a wheel that constitutes a driving wheel of a vehicle, a three-phase motor that is disposed inside the casing and that rotationally drives the wheel, and a three-phase power supply that supplies electric power to the three-phase motor An in-wheel motor comprising a cable,
The casing has a cable lead-in portion that pulls and fixes three terminal portions of the three-phase power feeding cable,
The terminal portions of the first phase and the third phase are disposed in parallel with the rotation axis of the wheel at intervals shorter than the cross-sectional dimension of the terminal portion of the second phase, and the terminal portions of the second phase are the first phase and the first phase. Displaced by a displacement dimension in a direction perpendicular to the rotation axis from the three-phase end, and is arranged in a triangle.
Each of the terminal portions of the three-phase power supply cable has a terminal that terminates a core wire, and the cable lead-in portion of the casing is connected to each of the terminals of the terminal portion of the three-phase power supply cable. A terminal block with
A bus bar that connects the three-phase terminal receiving portions arranged in a triangular manner and the respective phase coil connection screws of the three-phase motor arranged in a row while absorbing the displacement dimension is provided inside the terminal block. An in-wheel motor characterized by that. In Claim 1, the arrangement of the three-phase terminal receiving portions and the arrangement of the respective phase coil connection screws are arranged at an angle of 90 °,
The bus bar bends 90 ° in the middle of the first phase, bends 90 ° in the middle of the second phase and has a step corresponding to the displacement dimension, and is omitted in the third phase. In-wheel motor.   The terminal block is provided on an outer periphery of the stator of the three-phase motor, and the three-phase external terminal of the three-phase motor led to the outer periphery of the stator by the terminal block and the three-phase power feeding. An in-wheel motor, wherein the terminal of the cable is connected to each other. 4. The terminal portion of the three-phase power supply cable according to claim 2 or 3, wherein each of the terminal portions of the three-phase power supply cable has a bracket for grounding a shield braid, and the cable lead-in portion of the casing is connected to the terminal portion of the three-phase power supply cable. Having bracket fixing portions for fixing the brackets;
The first-phase and third-phase bracket fixing parts are respectively arranged so as to be displaced from the first-phase and third-phase power supply cables in the direction away from the second phase at right angles to the rotation axis, and to fix the second-phase bracket. The in-wheel motor is characterized in that the portion is arranged to be displaced in the opposite direction away from the first phase and the third phase from the second phase power supply cable at a right angle to the rotation axis.   5. The in-wheel motor according to claim 1, wherein the cable lead-in portion of the casing is disposed adjacent to a brake rotor provided integrally with the wheel.

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