JP4162460B2 - In-wheel motor wiring structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an in-wheel motor that is disposed in a wheel of a vehicle and rotationally drives a drive wheel, and more particularly to a wiring structure that electrically collects annularly arranged stator coils at predetermined locations in a housing. is there.
[0002]
[Related background]
An in-wheel motor that is arranged in the wheel of a vehicle and directly drives the drive wheels has various advantages such as space saving on the vehicle body side, omission of transmission and differential gear, and omission of the drive shaft in the case of independent suspension. Therefore, it is widely implemented mainly for relatively small vehicles such as forklifts and golf carts.
[0003]
In this type of in-wheel motor, a stator is formed by arranging a large number of stator coils in a ring in the order of U, V, W in a housing, and a rotor is rotatably supported on the inner peripheral side of the stator. Each stator coil is electrically connected to a controller outside the housing, and the stator coils of each phase are sequentially energized by the controller based on the rotation angle of the rotor detected by the sensor. As a result, a rotational force is applied to the rotor by the magnetic field generated in the stator coil, and the rotation of the rotor is transmitted to the drive wheels after being decelerated through the reduction mechanism.
[0004]
In order to connect each stator coil arranged in a ring with a controller outside the housing, it is necessary to electrically gather each stator coil at a predetermined location in the housing. Yes (see, for example, Patent Document 1).
The connection unit described in Patent Document 1 has an annular shape centering on the rotor as a whole and is disposed on the side of the stator, and includes three conductive members corresponding to U, V, and W phases. It is configured by overlapping with an insulator. The fixed part formed on the outer periphery of each conductive member is connected to the wiring drawn from each stator of the corresponding phase by caulking or soldering, while the terminal piece formed on one side of each conductive member includes: A controller outside the housing is connected via wiring. Therefore, each stator is electrically gathered at the location of the terminal piece via the conductive member, and is supplied with power from the controller via this terminal piece.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 6-233383 (paragraph numbers 0020-0024, FIGS. 3 and 5)
[0006]
[Problems to be solved by the invention]
In the connection unit described in Patent Document 1 described above, it is necessary to individually manufacture a large number of conductive members and insulators, and it is also necessary to complete these members after manufacture to complete a connection unit. There are considerable costs to manufacture. In addition, the wiring drawn from each stator coil is individually caulked or soldered to the fixed portion of the conductive member, so that the assembly is very complicated, which in turn increases the manufacturing cost of the in-wheel motor. It was.
[0007]
On the other hand, this type of in-wheel motor is not limited in outer diameter due to its placement in the wheel, but in order to avoid influence on the suspension mechanism (for example, shortening of the arm length, etc.) The size is also required to be reduced. However, in the in-wheel motor, since the connection unit is disposed on the side of the stator, the size in the vehicle width direction inevitably increases, and this requirement cannot be satisfied.
[0008]
Accordingly, an object of the present invention is to electrically gather each stator coil at a predetermined location in the housing without using a connection unit, thereby reducing manufacturing costs and achieving reduction in the vehicle width direction. It is an object to provide a wiring structure for an in-wheel motor.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 is provided such that a rotor rotatably supported in a housing and connected to a driving wheel of a vehicle, and an annular stator core on the outer peripheral side of the rotor, A stator configured by arranging a large number of bobbins each having a stator coil wound around the stator core in order of each phase, an inner circumferential side of the stator coil on the one side in the axial direction of the stator core of each bobbin, and the above respectively provided on the outer peripheral side of the stator coil, at inner and outer circumferential sides supported by fractionation wiring the stator coils in each phase, a holder portion for the set in a predetermined position within the housing, in the housing Control means connected to the wiring of each of the stator coils via a predetermined location and sequentially energizing the stator coil for each phase according to the rotation angle of the rotor. Than is.
[0010]
Therefore, the wiring from each stator coil is gathered at a predetermined location in the housing while being supported by the holder part of each bobbin and connected to the wiring on the control means side, and the control means changes the phase of each phase according to the rotation angle of the rotor. When the stator coils are sequentially energized, a rotational force is applied to the rotor by a magnetic field generated along with the excitation of the stator coils, and the drive wheels of the vehicle are rotated together with the rotor.
[0011]
And since the holder part provided in the bobbin plays the role which gathers the wiring from each stator coil in the predetermined location in a housing in this way, the unit for connection described in patent document 1 becomes unnecessary. Since the holder part can be easily formed at the same time as the bobbin is manufactured, it can be manufactured at a lower cost than a connection unit that requires multiple conductive members and insulators to be individually manufactured and stacked. At the time of assembly, the wires from each stator coil are simply bundled by terminals and connected to the wiring connection portion, so that the assembly is much easier than in the case of caulking or soldering as in Patent Document 1. Is possible.
[0012]
In addition, since the outer dimension of the bobbin in the vehicle width direction is hardly increased even if the holder portion is provided, the vehicle width of the in-wheel motor is compared with the case where the connection unit of Patent Document 1 is installed on the side of the stator. There is no risk of increasing the direction dimension .
[0013]
Further, the wiring from the stator coil is separated into each phase and then guided by the holder portions on the inner peripheral side and the outer peripheral side of the bobbin. Since a certain amount of dead space is originally formed on the inner and outer circumferences of the stator, wiring can be guided almost without enlarging the outer diameter of the in-wheel motor by using the dead space.
[0014]
According to a second aspect of the present invention, in the first aspect, each bobbin is provided with a slack regulating portion that is located on the inner peripheral side of the wiring supported by the holder portion and that projects from the wiring to one side in the axial direction of the stator core. It is provided.
Accordingly, since the slack restriction portion provided on the bobbin restricts the slack of the wiring toward the inner peripheral side, the interference of the wiring with the rotor rotating on the inner peripheral side is prevented in advance.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of an in-wheel motor embodying the present invention will be described.
The in-wheel motor of this embodiment is provided in each of the left and right rear wheels of the electric vehicle, and is driven and controlled by a controller according to the driver's accelerator operation to individually rotate and drive each rear wheel.
[0016]
FIG. 1 is a cross-sectional view of an in-wheel motor provided on the left rear wheel of the present embodiment as viewed from the rear, in which the right side corresponds to the vehicle body side and the left side corresponds to the tire side. The housing of the in-wheel motor 1 is composed of a motor housing 2a and a gear housing 2b, and both the housings 2a and 2b are joined from the left and right and fixed by bolts (not shown). The lower end of the strut 3 and the outer end of the lower arm 4 from the vehicle body side are connected to the right side surface of the motor housing 2a, and the entire in-wheel motor 1 is supported to the vehicle body via the strut 3 and the lower arm 4. .
[0017]
In the housings 2a and 2b, a rotor shaft 5 and a spindle shaft 6 are coaxially disposed so as to extend in the left-right direction (vehicle width direction), and a counter shaft 7 is provided at an eccentric position with respect to these shafts 5 and 6. It arrange | positions in parallel and each shaft 5-7 is rotatably supported by the bearing 8 separately. Although not shown, the left end of the rotor shaft 5 is supported by a bearing provided at the right end of the spindle shaft 6.
[0018]
A rotor gear 9 is integrally formed on the rotor shaft 5, and a spindle gear 10 is integrally formed on the spindle shaft 6, and a first counter gear 11 that meshes with the rotor gear 9 and a second counter gear that meshes with the spindle gear 10 on the counter shaft 7. 12 is integrally formed. Therefore, the rotation of the rotor shaft 5 is decelerated in two stages between the rotor gear 9 and the first counter gear 11 and between the second counter gear 12 and the spindle gear 10 and is transmitted to the spindle shaft 6.
[0019]
For the purpose of lubrication of the gears 9 to 12 and cooling of the stator coil 32 to be described later, oil is stored in the housings 2a and 2b, and the oil level of the oil is the gears 9 to 12 and a rotor to be described later. In order to suppress an increase in the rotational resistance of 25, the height is adjusted to about の in the housings 2a and 2b.
The left end of the spindle shaft 6 protrudes to the right from the gear housing 2b and a wheel hub 15 is fixed. A wheel 16 of a driving wheel is attached to the wheel hub 15 by a nut 17, and the in-wheel motor 1 is positioned in the wheel 16. is doing. The wheel hub 15 has a bottomed cylindrical shape that opens to the right, and the opening is closed by a disc-shaped back plate 18 fixed to the gear housing 2b. A hydraulic drum brake 19 is built in the wheel hub 15. When hydraulic fluid is supplied from the vehicle body via the hydraulic pipe 20 in accordance with a brake operation by the driver, the drum brake 19 is activated and braking force is increased. It has come to be obtained.
[0020]
On the other hand, a disk-shaped rotor hub 23 is press-fitted into the rotor shaft 5, and a large number of rotor cores 24 made of permanent magnets are fixed to the outer periphery of the rotor hub 23, and the rotor 25 is formed by these rotor shaft 5, rotor hub 23, and rotor core 24. Is configured. A sensor plate 27 is fixed to the rotor hub 23 by bolts 26, and detection portions 27 a are formed at six equally divided outer circumferences of the sensor plate 27. As the rotor 25 rotates, the detection portion 27a of the sensor plate 27 sequentially opposes the rotation angle detection sensor 28 fixed to one side of the gear housing 2b, and the rotation angle detection sensor 28 synchronizes with the rotation angle of the rotor 25. The detected signal is output to the controller 53 described later.
[0021]
2 is a partially enlarged sectional view showing details of the stator 31, FIG. 3 is a sectional view taken along the line III-III of FIG. 2 showing the details of the stator 31, and FIG. 4 shows the relationship between the stator core 32, the bobbin 33, and the binding ring 40. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.
An annular stator 31 is disposed on the outer periphery of the rotor 25, and the inner periphery of the stator 31 is opposed to the outer periphery of the rotor core 24 via a predetermined gap. The stator 31 is configured by arranging a large number of bobbins 33 around which a stator coil 32 is wound on an annular stator core 34, and an annular stator housing portion 35 formed around the rotor shaft 5 in the motor housing 2a. It is arranged in the inside.
[0022]
In particular, as shown in FIGS. 2 and 4, the stator core 34 includes an inner core 36 on the inner peripheral side and an outer core 37 on the outer peripheral side, and is manufactured by laminating a number of electromagnetic steel sheets in the left-right direction. A large number of core portions 36a projecting in the outer peripheral direction are arranged at equal intervals on the inner core 36, and the outer core 37 is externally fitted to the tip of each core portion 36a. Between the inner core 36 and the outer core 37, each core portion 36a is fitted with a bobbin 33 injection-molded from a synthetic resin material, and a stator coil 32 is wound around each bobbin 33.
[0023]
As shown in FIGS. 2 and 4, a bobbin side ring groove 38 is formed on the outer peripheral surface of each bobbin 33 around the rotor shaft 5 along the right side surface of the stator core 34. It continues in the circumferential direction so as to surround the outer periphery of each bobbin 33. A housing-side ring groove 39 is formed on the entire inner periphery of the stator housing portion 35 so as to face the bobbin-side ring groove 38.
[0024]
A bundling ring 40 is disposed inside the bobbin side ring groove 38 and the housing side ring groove 39. The bundling ring 40 has an annular shape extending in the entire circumferential direction of the ring grooves 38, 39, and one side thereof is cut away. A notch 40a is formed. The bundling ring 40 is fitted into the bobbin side ring groove 38 with elasticity in the direction of diameter reduction, and abuts against the inner wall of the housing side ring groove 39 so that the bobbin side ring groove 38 is expanded from the inside to the outer peripheral side as it expands. Withdrawal is regulated. Accordingly, the bobbins 33 are urged toward the inner peripheral side by the binding ring 40 and are firmly bound to the core portion 36a of the inner core 36 without causing backlash.
[0025]
The outer core 37 of the stator core 34 is fixed to the motor housing 2a by a bolt (not shown), and as is clear from FIG. 2, the movement of the inner core 36 to the left via the binding ring 40 is restricted. As a whole, the stator 31 is fixed in the stator housing portion 35.
As shown in FIGS. 2 and 3, holder portions 43 projecting to the left are formed on the outer peripheral side and the inner peripheral side of each bobbin 33, and the U-phase holding groove 43 u and the holder portion 43 on the outer peripheral side are formed. A V-phase holding groove 43v is formed, and a W-phase holding groove 43w is formed in the holder portion 43 on the inner peripheral side. Each stator coil 32 is separated into three phases of U, V, and W and arranged alternately, and wiring 32w drawn from the stator coil 32 corresponding to the U phase (the substance is the end of the stator coil 32, but the following) (Referred to as the wiring of the stator coil 32) is assembled to the terminal base 44 provided on one side of the housings 2a and 2b while being fitted and supported in the U-phase holding groove 43u. The wiring 32v drawn from the coil 32 is fitted into the V-phase holding groove 43v, and the wiring 32w drawn from the W-phase stator coil 32 is fitted and supported in the W-phase holding groove 43w. Yes.
[0026]
In order to shorten the length of the stator coil 32, the wires 32u, 32v, and 32w of the stator coil 32 corresponding to a half circumference are shown in FIG. 3 with the bobbin 33 farthest from the terminal board 44 as a boundary. Although guided clockwise, the wirings 32u, 32v, 32w of the stator coil 32 for the remaining half circumference are guided counterclockwise, although not shown. Further, the wirings 32u, 32v, and 32w maintain the routing shape by their own rigidity, thereby preventing separation from the holding grooves 43u, 43v, and 43w.
[0027]
Here, as is apparent from FIG. 2, the inner and outer holder portions 43 protrude slightly from the bobbin 33 to the left, and therefore in-wheel compared to the case where the holder portion 43 is not provided. The left and right dimensions of the motor 1 are hardly increased.
In addition, on the left side of the stator 31, a certain amount of dead space is originally formed between the inner periphery side of the stator 25 and members such as the rotor 25, and the outer periphery side of the stator 25 is between members such as the terminal substrate 44. A certain amount of dead space is originally formed, and the holder portion 43 of each bobbin 33 is provided using the dead space. That is, since the holder portion 43 for one phase is provided on the inner peripheral side and two phases are provided on the outer peripheral side in accordance with the dead space on the inner and outer periphery of the stator 31, compared with the case where the holder portion 43 is not provided. The outer diameter of the in-wheel motor 1 has hardly increased.
[0028]
Each bobbin 33 is formed with a slack restricting portion 45 in the vicinity of the inner peripheral side holder portion 43, and although not shown in FIG. 2, the slack restricting portion 45 is left like the inner peripheral side holder portion 43. It protrudes toward. As shown in FIG. 3, the wiring 32 w drawn from the W-phase stator coil 32 is guided to the W-phase holding groove 43 w of the holder portion 43 through the outer peripheral side of the slack regulating portion 45. Therefore, the slack restricting portion 45 restricts the slack of the wiring 32w toward the inner peripheral side, thereby preventing the interference of the wiring 32w with the rotor 25 rotating on the inner peripheral side.
[0029]
On the other hand, the terminal board 44 is injection-molded with a synthetic resin material, and is disposed along the joint surface between the motor housing 2a and the gear housing 2b on one side of the outer periphery of the stator 31. The terminal board 44 is fixed to the motor housing 2b by screws 44a. As shown in FIG. 2, both side surfaces of the terminal board 44 are exposed in terminal accommodating portions 46a and 46b formed in the motor housing 2a and the gear housing 2b, respectively. is doing. Three bolt holes 47 corresponding to each phase are formed through the front and back of the terminal board 44, and metal terminal bolts 48 are inserted into the respective bolt holes 47 from the motor housing 2b side. The tip of each terminal bolt 48 protrudes toward the gear housing 2b, and a metal terminal nut 49 is screwed into each terminal bolt 48.
[0030]
The wirings 32u, 32v, 32w from the stator coils 32 are bundled for each phase on both sides (left and right sides in FIG. 3) of the terminal board 44 and connected to the terminals 50, and the terminal housing portion on the gear housing 2b side. Each terminal 50 is sandwiched between the corresponding terminal nut 49 and the terminal board 44 in 46b. On the other hand, a terminal 51 is also sandwiched between the terminal bolt 48 of each phase and the terminal board 44, and a power cable 52 of each phase is connected to each terminal 51 in the terminal accommodating portion 46a on the motor housing 2a side. Yes.
[0031]
Accordingly, the wirings 32u, 32v, 32w of the stator coil 32 and the power cable 52 are fixed to the terminal board 44 by the terminal bolts 48 and the terminal nuts 49, and the metal terminal bolts 48 and the terminal nuts 49 are interposed therebetween. Are mutually connected.
On the other hand, FIG. 5 is a cross-sectional view taken along the line V-V of FIG. 2 showing the motor housing 2a side of the terminal board 44. As shown in this figure, a bolt rotation restricting portion 55 is provided on the motor housing 2a side of the terminal board 44. The bolt rotation restricting portion 55 is erected and is in contact with a plurality of sides of the head of each terminal bolt 48 having a hexagonal shape to restrict the rotation of the terminal bolt 48. Further, a terminal rotation restricting portion 56 is extended from the bolt rotation restricting portion 55 corresponding to each terminal 51 of the power cable 52, and the rotation of each terminal 51 around the terminal bolt 48 by the terminal rotation restricting portion 56. Is regulated. Further, as shown in FIG. 3, terminal rotation restricting portions 57 are erected on the side of the gear housing 2b of the terminal board 44 in correspondence with the terminals 50 of the wires 32u, 32v, 32w from the stator coil 32. The terminal rotation restricting portion 57 restricts the rotation of each terminal 50 around the terminal bolt 48.
[0032]
As shown in FIG. 2, a grommet mounting hole 60 having a circular cross section is provided in the motor housing 2a so as to communicate the inside of the terminal accommodating portion 46a and the outside of the housings 2a, 2b. A made grommet 61 is inserted with elasticity from the right side. FIG. 6 is a perspective view showing the grommet 61. As shown in FIG. 6, the grommet 61 has a substantially cylindrical shape as a whole, and its tip (the left end in FIGS. 2 and 6) is formed on the inner periphery of the grommet mounting hole 60. It is positioned in the axial direction (left-right direction) in contact with the stepped portion 60a. A fixing plate 63 is attached to the outer wall surface of the motor housing 2a by bolts 62. The fixing plate 63 comes into contact with a flange portion 61a formed at an intermediate portion of the grommet 61 from the right side and enters the grommet mounting hole 60 from the inside. The grommet 61 is prevented from being detached.
[0033]
Reference numeral 64 denotes a grip portion for gripping the grommet 61 when it is inserted into the grommet mounting hole 60.
In addition, two engagement grooves 60b are formed in the grommet attachment hole 60 over the entire circumference, and the engagement protrusions formed in the outer periphery of the grommet 61 over the entire circumference in these engagement grooves 60b. 61b is engaged with elasticity, and thereby the oil tightness between the outer periphery of the grommet 61 and the inner periphery of the grommet mounting hole 60 is maintained.
[0034]
The grommet 61 is formed with three seal holes 65 penetrating the inside and the outside of the motor housing 2a. Each seal hole 65 has a circular cross section corresponding to the power cable 52, and the inner diameter thereof is the outer diameter of the power cable 52. Is almost the same. The power cable 52 from the terminal board 44 is inserted into each seal hole 65 for each phase, and the outer end of the power cable 52 taken out from the motor housing 2a is connected to the controller 53 (control means). .
[0035]
In each seal hole 65, two seal ridges 65a are formed over the entire circumference, and each seal ridge 65a is elastically pressed against the outer periphery of the power cable 52, and at these seal ridges 65a. The inside and outside of the housings 2a and 2b are partitioned to maintain oil tightness.
As shown in FIG. 3, an oil temperature sensor 66 is disposed on one side of the stator 31, and a wiring 67 from the oil temperature sensor 66 uses a holding portion 68 formed on one side of the terminal base 44. While being held, the grommet 61 is guided to the grommet 61. Although not shown, the controller 53 outside the housings 2a and 2b passes through a seal hole 69 formed in the grommet 61 (having a seal protrusion with the same configuration as the seal hole 65). It is connected to the.
[0036]
The in-wheel motor 1 of this embodiment is configured as described above, and the controller 53 sequentially energizes the stator coil 32 of the stator 31 corresponding to the rotation angle of the rotor 25 based on the detection signal of the rotation angle detection sensor 28. Then, a rotational force is applied to the rotor 25 by the magnetic field generated in the stator core 34 as the stator coil 32 is excited. The rotation of the rotor 25 is transmitted to the spindle shaft 6 while being decelerated by the respective gears 9 to 12, and the driving wheels are driven to rotate together with the spindle shaft 6 so that the vehicle travels. The controller 53 adjusts the electric power supplied to the stator coil 32 on the basis of the driver's accelerator operation amount, thereby realizing traveling according to the accelerator operation. Further, when the vehicle is decelerated, the rotor 25 is rotationally driven along the reverse transmission path from the drive wheels, and the regenerative power generated in the stator coil 32 is charged in a battery (not shown).
[0037]
As described above, the wires 32u, 32v, and 32w of the stator coil 32 are gathered on the terminal base 44 while being supported by the holder portion 43 provided on the bobbin 33 for each phase. The power cable 52 is connected. Since the holder portion 43 can be easily formed at the same time as the injection molding of the bobbin 33, it can be manufactured at a lower cost than the connection unit described in, for example, Patent Document 1 composed of a large number of conductive members and insulators. At the time of assembling, the wiring 32u, 32v, 32w from each stator coil 32 is simply fitted into the holding grooves 43u, 43v, 43w of the holder portion 43, so that the wiring is caulked or soldered as in Patent Document 1. As compared with the case, it can be assembled very easily, and as a result, the manufacturing cost of the in-wheel motor 1 can be greatly reduced.
[0038]
Moreover, since the holder part 43 protrudes slightly to the left from the bobbin 33, compared with the patent document 1 which installed the unit for connection in the side of the stator, reduction in the vehicle width direction of the in-wheel motor 1 is carried out. Can be achieved.
Further, since dead spaces on the inner and outer circumferences of the stator 31 are used, and the holder portion 43 is separated into one phase on the inner circumference side and two phases on the outer circumference side according to these dead spaces, almost The wirings 32u, 32v, 32w from each stator coil 32 can be guided without increasing the outer diameter of the wheel motor 1. As a result, in combination with the reduction in the vehicle width direction described above, the in-wheel motor 1 as a whole can be downsized.
[0039]
On the other hand, the wiring 32w routed on the inner peripheral side of the bobbin 33 is restricted from slacking to the inner peripheral side by the slack regulating portion 45 formed on the bobbin 33, and therefore the wiring 32w to the rotor 25 rotating on the inner peripheral side. There is also an advantage that the interference can be prevented and the reliability can be improved by preventing troubles such as disconnection.
This is the end of the description of the embodiment, but the aspect of the present invention is not limited to this embodiment. For example, in the above-described embodiment, the in-wheel motor 1 provided on the rear wheel of the electric vehicle is embodied. However, the present invention is not limited to this. For example, the front wheel or all the wheels are replaced with the in-wheel. The motor 1 may be provided, or may be embodied in an in-wheel motor 1 for a hybrid vehicle that includes an engine together with a motor as a travel drive source.
[0040]
Further, in the above embodiment, the wires 32u, 32v, 32w from the respective stator coils 32 are assembled on the terminal base 44 while being supported by the holder portion 43. However, without using the terminal substrate 44, the grommet 61 is used as it is. Then, it may be connected to the controller 53 outside the housings 2a and 2b. In this case, the location of the grommet 61 where the wirings 32u, 32v, 32w are gathered is a predetermined location in the housing 2a, 2b.
[0041]
Further, in the above embodiment, the holder portion 43 is separated into one phase on the inner peripheral side and two phases on the outer peripheral side in accordance with the dead space on the inner and outer periphery of the stator 25. However, the layout of the holder portion 43 is in-wheel. It can be arbitrarily changed according to the structure of the motor 1. For example, two phases are provided on the inner circumference side and one phase is provided on the outer circumference side, or all three phases are provided on either the outer circumference side or the inner circumference side. Good.
[0042]
【The invention's effect】
As described above, according to the wiring structure of the in-wheel motor of the first aspect of the present invention, since the wiring from the stator coil is guided by the holder portion provided on the bobbin and is assembled at a predetermined location in the housing, The manufacturing cost can be reduced as compared with the connection unit of Patent Document 1 consisting of a single conductive member and an insulator, and the abolition unit whose installation position is restricted to the side of the stator is eliminated. Reduction in the vehicle width direction can be achieved.
[0043]
Moreover, since the wiring is guided using the dead space on the inner and outer circumferences of the stator, the in-wheel motor can be further reduced in size.
According to the wiring structure of the in-wheel motor of the second aspect of the invention, in addition to the first aspect, the loosening of the inner peripheral side of the bobbin is regulated by the slack regulating part, so that the disconnection when the wiring interferes with the rotor. It is possible to prevent such troubles and improve the reliability.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an in-wheel motor provided on a left rear wheel of an embodiment as viewed from the rear.
FIG. 2 is a partially enlarged cross-sectional view showing details of a stator.
3 is a cross-sectional view taken along the line III-III of FIG. 2 showing details of the stator.
4 is a cross-sectional view taken along line IV-IV in FIG.
5 is a cross-sectional view taken along line VV in FIG. 2 showing the motor housing side of the terminal board.
FIG. 6 is a perspective view showing a grommet.
[Explanation of symbols]
2a Motor housing 2b Gear housing 25 Rotor 31 Stator 32 Stator coil 32u Wiring 32v Wiring 32w Wiring 33 Bobbin 34 Stator core 43 Holder part 45 Slack regulating part 53 Controller (control means)

Claims (2)

A rotor rotatably supported in the housing and coupled to the drive wheels of the vehicle;
An annular stator core is disposed on the outer peripheral side of the rotor, and a stator configured by arranging a large number of bobbins each having a stator coil wound around the stator core in order of each phase;
One axial side of the stator core of each bobbin, respectively provided on the outer peripheral side of the inner periphery side and the stator coil than the stator coil, the wires of the stator coils in each phase in the inner and outer circumferential sides A holder part that is separated and supported, and gathers at a predetermined location in the housing;
And a control means connected to the wiring of each of the stator coils via a predetermined location in the housing, and sequentially energizing the stator coil for each phase in accordance with the rotation angle of the rotor. Wheel motor wiring structure. Each of the bobbins is provided with a slack regulating portion that is located on the inner peripheral side of the wiring supported by the holder portion and is formed to protrude from the wiring to one side in the axial direction of the stator core. The in-wheel motor wiring structure according to claim 1 .

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