JP2009124829A - Driver of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a driver for vehicle that limits vibration being applied to a controller even if the controller is integrated with a motor, and maintains the temperature of a controller below an allowed level. <P>SOLUTION: The driver for vehicle includes a motor 30 having a motor case 3, a rotating shaft 1, a rotor 6 provided on the rotating shaft and a stator 7, a case 12 removably fixed to the motor case and through which open air flows in and out, a mounting plate 13 provided in the removable case and supported resiliently by a vibration-proof member 11, a controller 16 mounted on the mounting plate and supplying power to the motor, and a heat sink 15 mounted on the mounting plate and supplying power to the motor. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle drive device that includes an electric motor and a control device that controls the electric motor.

  2. Description of the Related Art A vehicle drive device, for example, a railroad vehicle drive device includes a plurality of main motors installed in a carriage in the vicinity of wheels and a control device that drives these main motors. Conventionally, in induction motors used as main motors, a single control device drives a plurality of main motors, so the control devices are installed under the floor of the vehicle and connected to each main motor by wiring. .

  In recent years, permanent magnet synchronous motors have come to be applied as main motors due to advances in technology for improving magnet performance and increasing magnetic flux density. In this case, the main motor and the control device that supplies power correspond to 1: 1. Therefore, the control device does not have to be installed under the floor of the vehicle, and can be installed in the vicinity of each main motor or integrated with the main motor. When the main motor and the control device are integrated, the following various merits arise.

  First, a conventional main motor and a control device are connected by a cable. If both are arranged close to each other, the wiring distance is shortened, or the wiring is unnecessary, so that the cost can be reduced. Further, since no wiring noise is generated, the influence of noise on the signal line is eliminated.

Secondly, since the main motor and the control device individually correspond to each other at a 1: 1 ratio, the control device can be reduced in size, and the total cost including the main motor and the control device is reduced.
Thirdly, since the space under the floor of the vehicle occupied by the control device is vacant, it can be used effectively such as installation of another power supply device or installation of a two-story vehicle in this portion.
However, it is necessary to reduce the size of the main motor and the control device in order to fit them in a cart with many dimensional constraints. Further, since both the main motor and the control device generate heat, they must be sufficiently cooled so as not to exceed the allowable temperature.

An example of a drive device in which an electric motor and a control device are integrally provided is the device disclosed in Patent Document 1. According to this device, the cooling air is sucked from the outside by the rotation of the fan provided in the rotor, and when the sucked air passes around the switching element of the inverter, the heat is taken and exhausted to the outside. ing.
JP 2007-37262 A

However, the conventional electric vehicle driving apparatus described above has the following problems to be solved.
When the control device is installed under the floor of the vehicle as in the past, vibration caused by running of the train is damped by the air spring provided between the carriage and the vehicle, so that excessive vibration does not propagate to the control device. It was. However, when the control device is installed in the carriage, vibrations cannot be prevented by the air spring, and the control device directly receives vibrations from the carriage and the main motor. The main motor is not problematic because it is designed to withstand the vibration of the bogie, but the current control device is not sufficiently vibration proof and may break down. In addition, when the control device and the main motor are provided integrally, heat is conducted from the main motor to the control device, and the temperature in the control device may rise and exceed the allowable temperature.

  The present invention has been made to solve the above-described problems. The object of the present invention is to suppress vibration applied to the control device and tolerate the temperature of the control device even when the main motor and the control device are integrated. An object of the present invention is to provide a vehicle drive device that can be maintained below a value.

  A vehicle drive device according to an aspect of the present invention includes a motor case, a rotary shaft that is rotatably supported by the motor case, and that has an end protruding outside the motor case, and an interior of the motor case. And an electric motor having a rotor provided on the rotating shaft and a stator provided in the motor case, a detachable case that is detachably attached to the motor case, and that allows inflow and outflow of outside air, and A mounting plate provided in the detachable case and elastically supported by a vibration isolating member; a control device provided on the mounting plate for supplying power to the motor; and a cooling device provided on the mounting plate for cooling the control device. A heat sink.

  The control device is provided on one surface of the mounting plate, and the heat sink has a plurality of radiating fins provided on the other surface of the mounting plate and facing the control device with the mounting plate interposed therebetween. . The mounting plate has ventilation holes through which cooling air flows.

  A cooling fan attached to the rotating shaft in the motor case and rotatable integrally with the rotating shaft, a motor ventilation hole formed in the motor case for sucking cooling air, and formed in the motor case and the cooling fan And the detachable case is attached to the motor case so as to face the motor ventilation hole, and the detachable case is disposed in the detachable case from the intake port by the intake port and the cooling fan. And a ventilation hole that guides the cooling air that has been sucked into the controller and the heat sink around the heat sink.

  The control device is provided on one surface of the mounting plate, and the heat sink has a plurality of radiating fins provided on the other surface of the mounting plate and facing the control device with the mounting plate interposed therebetween. . The mounting plate has ventilation holes through which cooling air flows.

  The attachment / detachment case includes a plurality of attachment plates provided along a direction parallel to the rotation axis, and the attachment plates are elastically supported by the attachment / detachment case by vibration-proof members. The control device and the heat sink are attached.

The rotating shaft extends to the inside of the detachable case, is attached to an extended end of the rotating shaft, and can rotate integrally with the rotating shaft, and includes a cooling fan provided in the detachable case, the detachable The case has an exhaust port located on the radially outer side of the cooling fan, and an intake port for sucking outside air into the detachable case by the cooling fan.
The heat sink has a plurality of heat radiating fins attached to the mounting plate and provided radially inward of the cooling fan.

  An air intake duct that is connected to the detachable case and guides the cooling air into the detachable case, the motor case being positioned opposite to the detachable case and sucking the cooling air, and an exhaust for exhausting the cooling air And the attachment / detachment case is attached to the motor case so as to face the motor ventilation hole, and the attachment / detachment case is led from the intake duct into the attachment / detachment case and around the control device and the heat sink. There is a ventilation hole for guiding the flowing cooling air to the motor ventilation hole.

  The control device is provided on one surface of the mounting plate, and the heat sink has a plurality of radiating fins provided on the other surface of the mounting plate and facing the control device with the mounting plate interposed therebetween. .

  According to an aspect of the invention, even when the main motor and the control device are integrated, the vehicle drive device that can suppress vibration applied to the control device and maintain the temperature of the control device below an allowable value. Can be provided.

  Hereinafter, a vehicle drive device according to an embodiment of the present invention will be described in detail with reference to the drawings.

  First, a railway vehicle provided with an electric vehicle driving apparatus according to an embodiment of the present invention will be described. FIG. 21 schematically shows a railway vehicle. The railway vehicle includes a pair of bogie frames 52 each provided with wheels 50, and a vehicle 55 supported on the bogie frame via an air spring 54. An electric vehicle driving device 56 is placed in the vicinity of the wheel 50 on each bogie frame 52. As will be described later, the electric vehicle driving device 56 is integrally provided with an electric motor and a control device attached to the electric motor. The electric vehicle driving device 56 is connected so as to transmit the rotational force to the wheels 50 through a gear box and a coupling (not shown). The wheel 50 is placed on a rail (not shown). A structure including the wheels 50, the carriage frame 52, and the air spring 54 is collectively referred to as a carriage.

  A pantograph 57 is provided on the ceiling side of the vehicle 55, and this panda graph is in contact with the overhead wire 58. The electric power supplied from the overhead line 58 to the pantograph 57 passes through another device (not shown) and is supplied to the control device. Electric power is converted from direct current to alternating current by the control device, and is supplied to each motor through a wiring (not shown). The electric motor is operated by the supplied electric power, and rotates the wheel 50 through the gear box and the coupling, whereby the vehicle 55 travels on the rail.

Next, the electric vehicle driving apparatus according to the embodiment will be described.
(First embodiment)
FIG. 1 is a longitudinal sectional view of the electric vehicle driving apparatus according to the first embodiment, FIG. 2 is a sectional view taken along line A1-A1 of the electric vehicle driving apparatus shown in FIG. 1, and FIG. It is sectional drawing along line B1-B1 of the shown electric vehicle drive device.

  As shown in FIG. 1 to FIG. 3, the electric vehicle drive device is integrally provided with an electric motor 30 and a control device unit 32 that is detachably attached to one end of the electric motor.

  As shown in FIG. 1, the electric motor 30 includes a substantially cylindrical motor case 3 whose both ends are closed, and a rotating shaft 1 provided substantially coaxially through the motor case. Both end portions of the rotating shaft 1 are supported by the bearing 2 so as to be rotatable with respect to the motor case 3, and both end portions protrude outward from the motor case. One end of the rotating shaft 1 constitutes an output end that outputs a driving force to the wheel 50 via a coupling, a gear box, or the like (not shown).

  In the motor case 3, a cylindrical rotor core 6 is fixed to the central portion in the axial direction of the rotating shaft 1. The rotor core 6 is supported by a pair of rotor core pressers 34 so as to be sandwiched from both side surfaces in the axial direction. The rotor iron core 6 and the rotor iron core retainer 34 are formed with a plurality of rotor ducts 5 penetrating both in the axial direction.

  A cylindrical stator 7 formed of a laminated iron core is provided on the outer peripheral side of the rotor iron core 6 via an air gap (air gap). The stator 7 is fixed to the inner peripheral surface of the motor case 3. A plurality of axially extending grooves are formed in the inner peripheral portion of the stator 7, and the stator coil 4 is embedded in these grooves. The coil ends of the stator coil 4 protrude in the axial direction from both side surfaces of the stator 7.

  On the outer surface of the motor case 3, a plurality of pedestals (not shown) for attaching the electric motor 30 to the carriage frame 52 and attachment seats for connecting to other devices are provided. Further, the motor case 3 integrally has a cylindrical mounting rim 36 extending from the other end. The mounting rim 36 is formed coaxially with the rotary shaft 1 and extends flush with the peripheral wall of the motor case 3. The mounting rim 36 and the end wall of the motor case 3 form a recess 37 in which a cooling fan described later is accommodated.

  An outer fan 8 is attached to the end of the rotating shaft 1 on the side opposite to the load as a cooling fan. This external fan 8 is generally called a radial fan and is formed so as to be able to cope with both rotational directions of the rotary shaft 1. That is, the outer fan 8 has a disk-shaped fan base, and this fan base is fixed concentrically to the rotating shaft 1 and is rotated integrally with the rotating shaft. The fan base is provided with a plurality of plate-like blades 8a, each extending in the radial direction around the rotation shaft 1 and positioned at equal intervals in the circumferential direction.

  The external fan 8 is located in the recess 37 of the motor case 3. The blades 8 a of the outer fan 8 face the mounting rim 36. A plurality of exhaust ports 9 are formed in the mounting rim 36 so as to face the outer fan fan 8 and are separated from each other along the circumferential direction.

  As shown in FIG. 1, the control device unit 32 is attached to the attachment rim 36 of the electric motor 30 and is positioned opposite to the other end of the electric motor, that is, the outer fan fan 8. The control device unit 32 has a detachable case 12 formed in a cylindrical shape. The detachable case 12 has a cylindrical peripheral wall 12a, a disk-shaped first end wall 12b that closes one opening of the peripheral wall, and a disk-shaped second end wall 12c that closes the other opening of the peripheral wall. is doing.

  The detachable case 12 is detachably attached to the motor case by bolting the peripheral edge of the first end wall 12 b to the attachment rim 36 of the motor case 3 with a plurality of connection bolts 10. The first end wall 12 b is attached so as to close the recess 37 of the motor case 3, and faces the outer fan fan 8. The peripheral wall 12 a of the detachable case 12 extends substantially in line with the mounting rim 36.

  As shown in FIGS. 1 to 3, a circular ventilation hole 14 is formed in the center of the first end wall 12b of the detachable case 12 located on the electric motor 30 side, and outside air is introduced into the second end wall 12c. A plurality of intake ports 17 are formed. The shape of the air inlet 17 can be freely set.

  A disc-shaped mounting plate 13 is disposed in the detachable case 12. The mounting plate 13 is formed to have a diameter slightly smaller than those of the first and second end walls 12b and 12c, and is disposed between the first and second end walls so as to face these end walls. The mounting plate 13 is elastically supported in the detachable case 12 by a plurality of vibration isolating members, for example, coil springs 11, disposed between the outer peripheral edge of the mounting plate and the inner peripheral surface of the detachable case 12, respectively. Has been.

  Each coil spring 11 has one end fixed to the inner surface of the peripheral wall 12 a of the removable case 12 and the other end fixed to the outer peripheral edge of the mounting plate 13. A plurality of coil springs 11 are provided spaced apart from each other along the circumferential direction of the mounting plate 13, and in particular, a plurality of coil springs 11 are provided at shorter intervals than the upper side in the lower region of the mounting plate.

  The anti-vibration member is not limited to the coil spring as long as the attachment plate 13 can be anti-vibrated, and for example, a material that enables desired anti-vibration such as a rubber material, a resin material, a wire rope anti-vibration material is used. be able to.

  A plurality of control devices 16 that supply power to the motor 30 and control the operation of the motor are provided on the surface of the mounting plate 13 opposite to the motor 30, that is, the surface facing the second end wall 12 c of the detachable case 12. It is placed. Each control device 16 is formed in a rectangular box shape, and is installed at two places on the upper and lower sides of the mounting plate 13 here. The number of installed control devices 16 can be freely selected, and the arrangement may be left and right in addition to the top and bottom.

  A plurality of radiating fins 15 each of which is formed in a thin rectangular plate shape, which functions as a heat sink, is provided on the surface of the mounting plate 13 facing the electric motor 30. These heat radiating fins 15 extend in the radial direction with respect to the ventilation holes 14 formed in the first end wall 12b, and are provided at equal intervals along the circumferential direction. The dimensions and installation direction of the heat dissipating fins 15 can be freely set, and are attached so as to obtain a desired cooling performance.

The operation of the electric vehicle drive device 56 configured as described above will be described.
When the rotating shaft 1 is rotated by the electric motor during operation of the electric motor 30, the outer fan 8 is rotated integrally therewith. Then, outside air (cooling air) is sucked into the detachable case 12 from the air inlet 17 formed in the detachable case 12, cools the control device 16, passes through the gap between the detachable case 12 and the mounting plate 13, and then radiates fins. It flows in the direction of 15. The cooling air that has passed between the heat radiation fins 15 passes through the ventilation holes 14, is blown out in the radial direction by the external fan 8, and is exhausted to the outside through the exhaust port 9. Further, the heat generated by the control device 16 is conducted to the radiating fins 15 through the mounting plate 13 and diffused.

When the vehicle 55 travels, vibration propagates from the wheels 50 to the carriage frame 52. The electric motor 30 placed on the carriage frame 52 vibrates together, so that the detachable case 12 vibrates. The vibration propagates from the detachable case 12 to the mounting plate 13 via the coil spring 11 and reaches the control device 16 installed on the mounting plate 13.
These vibration propagation, cooling air flow, and heat diffusion are substantially the same even if the number and arrangement of the control devices 16, the shape of the radiating fins 15, and the shape of the intake port are freely set.

  Due to the above action, the vibration propagated from the wheel 50 to the bogie frame 52 and the electric motor 30 is sufficiently attenuated by the coil spring 11 and reaches the control device 16. Therefore, the vibration transmitted to the control device 16 can be sufficiently reduced, and even if the control device 16 is integrated with the electric motor 30, problems of the control device due to the vibration can be prevented.

  Further, the cooling air flows through the detachable case 12 by the suction force accompanying the rotation of the outer fan fan 8, takes away the heat generated from the control device 16 when passing between the radiating fins 15, and is exhausted to the outside. That is, the control device 16 can be forcibly air-cooled, and the control device can be maintained at or below the allowable temperature by increasing the cooling efficiency.

  In general, the control device 16 has a shorter service life than the electric motor 30, so that only the control device is replaced. In this case, the control device can be simply removed by removing the connection bolt 10 provided on the detachable case 12. The unit 32 can be easily replaced. This improves the maintainability of the electric vehicle drive device.

  As described above, even when the control device and the electric motor are integrated, a vehicle drive device that can suppress vibration applied to the control device and maintain the temperature of the control device below an allowable value can be obtained.

(Second Embodiment)
Next, an electric vehicle drive apparatus according to a second embodiment of the present invention will be described.
4 is a longitudinal sectional view of the electric vehicle driving apparatus according to the second embodiment, FIG. 5 is a sectional view taken along line A2-A2 of the electric vehicle driving apparatus shown in FIG. 4, and FIG. It is sectional drawing along line B2-B2 of the shown electric vehicle drive device. In the figure, the same elements as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 4 to 6, a ventilation hole 18 is formed in the central portion of the mounting plate 13 of the control device unit 32. A plurality of control devices 16 that supply power to the motor 30 and control the operation of the motor are provided on the surface of the mounting plate 13 opposite to the motor 30, that is, the surface facing the second end wall 12 c of the detachable case 12. It is placed. A plurality of radiating fins 15 each having a thin rectangular plate shape are provided on the surface of the mounting plate 13 facing the electric motor 30. The radiation fins 15 extend in parallel to each other along the vertical direction. The heat radiating fins 15 at both ends extend in the vertical direction, are located on both sides of the ventilation hole 18 and constitute a partition plate 19. The radiating fins 15 provided in the upper part and the lower part are each configured as one part and provided between the partition plates 19.

  Further, the first end wall 12b of the detachable case 12 is formed with rectangular ventilation holes 14 at two locations, an upper portion and a lower portion, and respectively opposed to the radiation fins 15. In 2nd Embodiment, you may install the control apparatus 16 not only in two places of upper and lower parts but in three or more places, and the attachment structure of a radiation fin can be changed with the number. In the second embodiment, other configurations are the same as those of the first embodiment.

According to the electric vehicle driving device 56 according to the second embodiment, the cooling air flowing into the detachable case 12 from the air inlet 17 flows into the gap between the detachable case 12 and the mounting plate 13, and the ventilation hole 18. The current is diverted to the current. The flow that has passed through the gap between the detachable case 12 and the mounting plate 13 flows outside the partition plate 19 toward the ventilation hole 14. Further, the flow that has passed through the ventilation holes 18 is divided vertically between the partition plates 19, passes through between the radiating fins 15, and then travels toward the ventilation holes 14. The wind that has passed through the ventilation holes 14 is exhausted from the exhaust port 9 to the outside by the external fan 8.
Operations other than those described above are the same as those in the first embodiment, including the vibration isolation function.

  In the electric vehicle driving apparatus according to the second embodiment, it is possible to obtain the same functions and effects as those of the first embodiment described above. Furthermore, according to the second embodiment, the cooling air that has passed through the ventilation holes 18 of the mounting plate 13 intensively passes between the radiation fins 15, so that the heat generated by the control device 16 can be efficiently radiated, The cooling performance of the control device 16 can be improved.

(Third embodiment)
Next, an electric vehicle drive apparatus according to a third embodiment of the present invention will be described.
7 is a longitudinal sectional view of the electric vehicle driving apparatus according to the third embodiment, FIG. 8 is a sectional view taken along line A3-A3 of the electric vehicle driving apparatus shown in FIG. 7, and FIG. It is sectional drawing along line B3-B3 of the shown electric vehicle drive device. In the figure, the same elements as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 4 to 6, an internal fan 20 fixed so as to be able to rotate integrally with the rotary shaft 1 is provided on the load side of the rotor core 6 in the motor case 3. A plurality of exhaust ports 9 are formed in the peripheral wall of the motor case 3 facing the outer peripheral portion of the inner fan 20. In general, the electric motor 30 having such a configuration is referred to as a self-ventilated electric motor.

A plurality of motor ventilation holes 14 a are formed in the end wall 3 a on the side opposite to the load of the motor case 3. The detachable case 12 of the control device unit 32 is detachably attached to the motor case with the first end wall 12b facing the end wall 3a of the motor case 3. A plurality of ventilation holes 14 are formed in the first end wall 12b, and are opposed to the motor ventilation holes 14a of the motor case 3, respectively. A ventilation hole 18 is formed in the central portion of the mounting plate 13, and the plurality of heat radiating fins 15 are arranged radially around the ventilation hole 18.
Other configurations are the same as those in the first or second embodiment.

  According to the electric vehicle driving device 56 configured as described above, the outside air (cooling air) flows into the detachable case 12 by the suction action of the inner fan 20 that rotates integrally with the rotary shaft 1. The flow of cooling air in the detachable case 12 is the same as in the second embodiment. The cooling air that has passed through the ventilation hole 14 and the motor ventilation hole 14 a flows into the motor case 3 of the electric motor 30, passes through the air gap and the rotor duct 5, and is then exhausted from the exhaust port 9 to the outside by the internal fan 20. .

Except this, it is the same operation as that of the second embodiment including the anti-vibration effect.
Also in the electric vehicle driving apparatus according to the third embodiment configured as described above, the same effects as those of the second embodiment can be obtained.

(Fourth embodiment)
Next, an electric vehicle drive apparatus according to a fourth embodiment of the present invention will be described.
10 is a longitudinal sectional view of the electric vehicle driving apparatus according to the fourth embodiment, FIG. 11 is a sectional view taken along line A4-A4 of the electric vehicle driving apparatus shown in FIG. 10, and FIG. It is sectional drawing along line B4-B4 of the shown electric vehicle drive device. In the figure, the same elements as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in FIGS. 10 to 12, in the fourth embodiment, the control device 16 is provided on the surface of the mounting plate 13 facing the electric motor 30, and the radiation fins 15 and the partition plate 19 are disposed on the surface opposite to the mounting plate. Is provided. That is, according to the fourth embodiment, the arrangement of the control device 16 provided in the detachable case 12, the radiation fins 15, and the partition plate 19 is the same as the arrangement of the second embodiment and the attachment plate 13. Symmetrically opposite. In addition, partition plates 19a extending in the horizontal direction are provided at the upper and lower ends of the radiating fins 15, respectively.
Other configurations are the same as those in the first and second embodiments.

  According to the electric vehicle driving device 56 configured as described above, the cooling air flows into the detachable case 12 from the rectangular intake port 17a by the suction action by the rotation of the outer fan fan 8, and passes between the radiating fins 15. Then, it goes to the ventilation hole 18 of the mounting plate 13. Due to the partition plate 19 and the partition plate 19 a, all the sucked cooling air flows toward the ventilation hole 18.

  The cooling air that has passed through the ventilation holes 18 is diverted toward the ventilation holes 14 provided in the first end wall 12b, and is further exhausted to the outside by the external fan 8 through the exhaust port 9. The operation other than the above is the same as that of the electric vehicle driving apparatus according to the first embodiment, including the vibration isolation effect.

  Also in the electric vehicle driving apparatus according to the fourth embodiment configured as described above, the same effect as in the first embodiment can be obtained. Further, according to the electric vehicle driving apparatus having the above-described configuration, since all the cooling air flowing into the detachable case 12 passes between the radiation fins 15 and goes to the ventilation holes 18 of the mounting plate, the cooling that passes between the radiation fins 15 is performed. Increases wind volume and flow velocity. Therefore, the heat generated from the control device 16 can be efficiently removed, and the cooling performance can be improved.

(Fifth embodiment)
Next, an electric vehicle drive apparatus according to a fifth embodiment of the invention will be described.
FIG. 13 is a longitudinal sectional view of the electric vehicle driving apparatus according to the fifth embodiment, and FIG. 14 is a sectional view taken along line A5-A5 of the electric vehicle driving apparatus shown in FIG. In the figure, the same elements as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 13 and 14, in the fifth embodiment, the detachable case 12 has a peripheral wall 12 a having a smaller diameter than the peripheral wall of the motor case 3 and one end of the peripheral wall 12 a closed and a diameter of the motor case. Are integrally provided with a disc-shaped first end wall 12b having an outer diameter substantially equal to that of the first end wall 12b and a second end wall 12c closed at the other end of the peripheral wall 12a. In addition, a cylindrical, for example, square cylindrical support frame 38 is disposed in the detachable case 12 and extends coaxially with the peripheral wall 12a between the first end wall and the second end wall.

  In the detachable case 12, two rectangular attachment plates 13 are disposed. Each of these mounting plates 13 extends in the horizontal direction, and is provided at two locations above and below the support frame 38. Between the four corners of each mounting plate 13 and the support frame 38, and between the four corners of the mounting plate and the peripheral wall 12a, vibration-proof members extending in the vertical direction, for example, coil springs 11, are provided. Is provided. Thereby, each mounting plate 13 is supported elastically by the coil spring 11, that is, so that vibration can be damped. A base 21 extending in the axial direction is fixed to the inner surface of the peripheral wall 12a, and the coil spring 11 is fixed to the base 21.

  In the detachable case 12, a control device 16 is installed on the radially outer surface of each mounting plate 13, and heat radiating fins 15 are provided on the opposite surface of the mounting plate. A plurality of rectangular air inlets 17 are formed in the second end wall 12 c of the detachable case 12 and face the heat radiating fins 15. A plurality of ventilation holes 14 are formed in the first end wall 12 b of the detachable case 12, and are positioned to face the radiation fins 15. Other configurations are the same as those of the first embodiment described above.

  According to the electric vehicle driving device 56 according to the fifth embodiment configured as described above, the cooling air flows into the detachable case 12 from the air inlet 17 by the suction action by the rotation of the outer fan fan 8, and dissipates heat. After passing between the fins 15, the air flows from the ventilation hole 14 toward the outer fan fan 8, and is further exhausted to the outside through the exhaust port 9 by the outer fan fan 8. The operation other than the above is the same as that of the electric vehicle driving apparatus according to the first embodiment, including the vibration isolation effect.

  Also in the electric vehicle driving apparatus according to the fifth embodiment configured as described above, the same effect as in the first embodiment can be obtained. Further, according to the electric vehicle driving apparatus having the above-described configuration, the plurality of mounting plates 13 are installed in the horizontal direction, one control device is provided on each mounting plate, and is supported and supported separately from the other mounting plates. Therefore, when the vibration propagates, the vibration of one mounting plate does not affect the other mounting plate.

  Moreover, since the ventilation path of the cooling air is only between the heat radiation fins 15 in the detachable case 12, the heat radiation fins 15 have a large amount of air and the cooling air having a fast flow passes therethrough. Therefore, the heat generated by the control device 16 can be efficiently radiated and the cooling performance can be improved.

  Furthermore, the radial dimension of the detachable case 12 can be shortened, and the occupied space as the detachable case can be reduced. Thereby, size reduction of the whole electric vehicle drive device can be measured.

(Sixth embodiment)
Next, a vehicle drive device according to a sixth embodiment of the present invention will be described.
15 is a longitudinal sectional view of the electric vehicle driving apparatus according to the sixth embodiment, FIG. 16 is a sectional view of the electric vehicle driving apparatus shown in FIG. 15 taken along line A6-A6, and FIG. It is sectional drawing along line B6-B6 of the shown electric vehicle drive device. In the figure, the same elements as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 15 to 17, in the sixth embodiment, the rotating shaft 1 of the electric motor 30 extends to the inside of the detachable case 12, and the outer fan fan 8 is attached to the end thereof. That is, the outer fan 8 is provided in the removable case 12.

  The detachable case 12 has a cylindrical peripheral wall 12a, a disk-shaped first end wall 12b that closes one opening of the peripheral wall, and a disk-shaped second end wall 12c that closes the other opening of the peripheral wall. is doing. The detachable case 12 is detachably attached to the motor case by bolting the peripheral edge of the first end wall 12 b to the attachment rim 36 of the motor case 3 with a plurality of connection bolts 10. The peripheral wall 12 a of the detachable case 12 extends substantially in line with the mounting rim 36.

  A disc-shaped mounting plate 13 is disposed in the detachable case 12. The mounting plate 13 is disposed between the first and second end walls so as to face these end walls. The attachment plate 13 is elastically supported in the attachment / detachment case 12 by a plurality of coil springs 11 disposed between the outer peripheral edge of the attachment plate and the inner peripheral surface of the attachment / detachment case 12.

  A through hole 40 is formed at the center of the first end wall 12 b of the detachable case 12, and a ventilation hole 18 is formed at the center of the partition plate 13. The rotary shaft 1 extends through the through hole 40 and the ventilation hole 18 to the space between the mounting plate 13 and the second end wall 12c. The through-hole 40, the ventilation hole 18, and the rotating shaft 1 have a dimensional configuration that does not interfere with each other. The external fan 8 attached to the extending end of the rotating shaft 1 is located between the attachment plate 13 and the second end wall 12c.

  A plurality of radiating fins 15 are fixed to the surface of the mounting plate 13 facing the second end wall 12c. These heat radiating fins 15 extend in the radial direction with respect to the ventilation holes 18 and are arranged on the radially inner side of the blades 8 a of the outer fan fan 8. A plurality of, for example, two control devices 16 are attached to the surface of the attachment plate 13 that faces the first end wall 12b.

A plurality of, for example, four exhaust ports 9 are formed in a portion of the peripheral wall 12a of the detachable case 12 facing the outer periphery of the outer fan fan 8, and are spaced apart from each other along the circumferential direction. In the peripheral wall 12a of the detachable case 12, a plurality of, for example, four intake ports 17 are formed in a portion located on the radially outer side of the control device 16, and are spaced apart from each other along the circumferential direction. Four intake ports 17 and four exhaust ports 9 are formed on the peripheral wall of the detachable case 12, but the number of installations, formation positions, and shapes are not particularly limited, and can be freely set.
The other configuration of the electric vehicle driving device 56 is the same as that of the first embodiment described above.

  According to the electric vehicle driving device 56 according to the sixth embodiment configured as described above, the cooling air flows into the detachable case 12 from the air inlet 17 by the suction action accompanying the rotation of the outer fan fan 8, It passes through the periphery of the control device 16 toward the ventilation hole 18 of the mounting plate 13. The wind that has passed through the ventilation holes 18 flows between the radiating fins 15 to the outside in the radial direction, and is exhausted from the exhaust port 9 to the outside by the external fan 8. The operation other than the above is the same as that of the electric vehicle driving apparatus according to the first embodiment, including the vibration isolation effect.

  In the electric vehicle driving apparatus according to the sixth embodiment configured as described above, the same effects as those of the first embodiment can be obtained. In addition, since the heat radiation fins 15 are provided at locations where the suction effect of the outer fan fan 8 is high, the flow speed passing between the heat radiation fins increases, the heat generated by the control device 16 can be efficiently radiated, and the cooling performance is improved. Can be increased.

(Seventh embodiment)
Next, a vehicle drive device according to a seventh embodiment of the present invention will be described.
18 is a longitudinal sectional view of the electric vehicle drive device according to the seventh embodiment, FIG. 19 is a cross-sectional view taken along line A7-A7 of the electric vehicle drive device shown in FIG. 18, and FIG. It is sectional drawing along line B7-B7 of the shown electric vehicle drive device. In the figure, the same elements as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 18 to 20, in the seventh embodiment, the cooling fan is omitted, and instead, an intake duct 22 is connected to the detachable case 12, and a blower (not shown) is provided at the tip of the intake duct 22. ing.

A plurality of motor ventilation holes 14 a are formed in the end wall on the opposite side of the motor case 3 of the motor 30, and a plurality of motor exhaust ports 23 are formed in the end wall on the load side. In general, an electric motor having such a configuration is referred to as a forced ventilation type electric motor. A ventilation hole 14 is formed in the first end wall 12b on the electric motor side of the detachable case 12, and faces the motor ventilation hole 14a.
The other configuration of the electric vehicle driving device 56 is the same as that of the first embodiment described above.

  According to the electric vehicle drive device 56 according to the seventh embodiment configured as described above, the cooling air forcedly sent from a blower (not shown) flows into the detachable case 12 through the intake duct 22. Then, after flowing around the control device 16, it passes through the gap between the mounting plate 13 and the detachable case 12. Thereafter, the cooling air passes between the radiation fins 15, passes through the ventilation holes 14 and the motor ventilation holes 14 a, and flows into the motor case 3 of the electric motor 30. Then, the cooling air passes through the air gap and the rotor duct 5 and is exhausted to the outside from the motor exhaust port 23.

  The operation other than the above is the same as that of the electric vehicle driving apparatus according to the first embodiment, including the vibration isolation effect. Also in the electric vehicle driving apparatus according to the seventh embodiment configured as described above, the same effect as in the first embodiment can be obtained.

  The present invention is not limited to the above-described embodiment, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. Some constituent elements may be deleted from all the constituent elements shown in the embodiments, or constituent elements over different embodiments may be appropriately combined.

  The present invention is not limited to the above-described electric motor for a vehicle drive device, but can also be applied to a rotary electric motor such as an automobile motor, a household appliance motor, an industrial motor, or a generator. The vibration isolation member is not limited to one type, and a plurality of types of vibration isolation members having different vibration isolation characteristics may be used in combination.

FIG. 1 is a longitudinal sectional view of an electric vehicle driving apparatus according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of the electric vehicle drive device taken along line A1-A1 in FIG. 3 is a cross-sectional view of the electric vehicle drive device taken along line B1-B1 of FIG. FIG. 4 is a longitudinal sectional view of an electric vehicle driving apparatus according to a second embodiment of the present invention. FIG. 5 is a cross-sectional view of the electric vehicle drive device taken along line A2-A2 of FIG. FIG. 6 is a cross-sectional view of the electric vehicle drive device taken along line B2-B2 of FIG. FIG. 7 is a longitudinal sectional view of an electric vehicle driving apparatus according to a third embodiment of the present invention. 8 is a cross-sectional view of the electric vehicle drive device taken along line A3-A3 in FIG. 9 is a cross-sectional view of the electric vehicle drive device taken along line B3-B3 in FIG. FIG. 10 is a longitudinal sectional view of an electric vehicle driving apparatus according to a fourth embodiment of the present invention. 11 is a cross-sectional view of the electric vehicle drive device taken along line A4-A4 in FIG. 12 is a cross-sectional view of the electric vehicle drive device taken along line B4-B4 of FIG. FIG. 13: is a longitudinal cross-sectional view of the electric vehicle drive device which concerns on the 5th Embodiment of this invention. 14 is a cross-sectional view of the electric vehicle drive device taken along line A5-A5 in FIG. FIG. 15: is a longitudinal cross-sectional view of the electric vehicle drive device which concerns on the 6th Embodiment of this invention. 16 is a cross-sectional view of the electric vehicle drive device taken along line A6-A6 in FIG. 17 is a cross-sectional view of the electric vehicle drive device taken along line B6-B6 of FIG. FIG. 18 is a longitudinal sectional view of an electric vehicle driving apparatus according to a seventh embodiment of the present invention. 19 is a cross-sectional view of the electric vehicle drive device taken along line A7-A7 in FIG. FIG. 19 is a cross-sectional view of the electric vehicle drive device taken along line B7-B7 in FIG. FIG. 21 is a side view showing a vehicle provided with the electric vehicle driving apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Rotary shaft, 3 ... Motor case, 4 ... Stator coil, 6 ... Rotor core,
7 ... Stator iron core, 8 ... Cooling fan, 11 ... Coil spring (vibration isolation member),
12 ... Detachable case, 13 ... Mounting plate, 14 ... Ventilation hole, 15 ... Radiation fin,
DESCRIPTION OF SYMBOLS 16 ... Control apparatus, 30 ... Electric motor, 32 ... Control apparatus unit, 56 ... Electric vehicle drive device

Claims (4)

A motor case, a rotary shaft that is rotatably supported by the motor case and has an end protruding outside the motor case, a rotor provided on the rotary shaft in the motor case, and the motor An electric motor having a stator provided in the case;
A detachable case that is detachably attached to the motor case, and that allows inflow and outflow of outside air;
A mounting plate provided in the detachable case and elastically supported by a vibration isolating member;
A control device provided on the mounting plate for supplying electric power to the motor;
A heat sink provided on the mounting plate for cooling the control device;
The drive device for vehicles provided with. A cooling fan attached to an end of the rotating shaft outside the motor case and rotatable integrally with the rotating shaft; and an exhaust port formed in the motor case and facing the cooling fan,
The detachable case is attached to the motor case facing the cooling fan,
The detachable case includes an air inlet, and a ventilation hole that guides the cooling air that is sucked into the detachable case from the air inlet by the cooling fan and flows around the control device and the heat sink to the cooling fan. The vehicle drive device according to claim 1. A cooling fan attached to the rotating shaft in the motor case and rotatable integrally with the rotating shaft, a motor ventilation hole formed in the motor case for sucking cooling air, and formed in the motor case and the cooling fan And an exhaust port opposed to
The detachable case is attached to the motor case facing the motor ventilation hole,
The detachable case includes an air inlet, and a ventilation hole that guides the cooling air that is sucked into the detachable case from the air inlet by the cooling fan and flows around the control device and the heat sink to the motor air hole. The vehicle drive device according to claim 1.   The vehicle drive device according to claim 1, further comprising an intake duct connected to the detachable case and guiding cooling air into the detachable case.

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