JP2008125172A - Driving device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact driving device excellent in cooling efficiency for vehicles. <P>SOLUTION: The driving device for vehicles comprises: a main motor with its interior sealed so as to prevent circulation between the inside air and outside air; a controller 9 for driving the main motor, disposed supported with a main motor frame 10 and having its first cooling liquid pipe 15A provided to its heat generation part; an outer fan fitted to a piece end of the rotary shaft 1 of the main motor and having radial-shaped blades; an outer fan cover 11 supported with the frame 10 and provided so as to cover the outer fan, having a first opening part for taking in cooling air and forming a second opening part for sending out the cooling air with the frame 10 side face in-between; and a radiator consisting of a radiation fin 14 provided in the vicinity of the second opening part for carrying out heat exchange with the cooling air and a second cooling liquid pipe 15 for carrying out heat exchange together with the radiation fin. The first cooling liquid pipe 15A and the second cooling liquid pipe 15 are connected by piping via a pump provided externally to circulate the cooling liquid. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle drive device in which a control device and an electric motor are installed integrally or close to each other, and more particularly to a vehicle drive device using a radiator for cooling.

  In a current vehicle drive device, for example, a railroad vehicle drive device, the main motor is disposed in the carriage, and the control device is disposed under the floor of the vehicle. When these are installed in a cart together or in close proximity, various merits are born.

  First, the conventional main motor and control device are connected by a cable, but if they are placed close together, the wiring distance will be reduced or wiring will be unnecessary, leading to cost reduction and improved reliability. It can be done.

  Secondly, when the permanent magnet synchronous motor is used as a future main motor, and the main motor and the control device correspond 1: 1, the control device becomes smaller, and the main motor and the control device. It is possible to reduce the total cost including.

  Thirdly, since the space under the floor of the vehicle occupied by the control device is vacant, it is possible to effectively use other devices such as two-story vehicles in this portion. There are various other benefits.

  As described above, various advantages can be obtained by integrating the main motor and the control device. However, it is necessary to reduce the size of the main motor and the control device so that they can be accommodated 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.

  There are two types of cooling methods for the main motor: the open type and the self-ventilated type.

  In the open type, a blower for taking in outside air is provided in a place different from the main motor to forcibly ventilate the inside of the machine.

  On the other hand, in the self-ventilation type, a fan connected to the rotating shaft is provided in the machine, and the machine is ventilated using the suction force of the fan during operation.

  However, in these cooling systems, the inside and outside of the machine communicate with each other, and dust enters the machine, so that regular maintenance (disassembly and cleaning) is required.

  Therefore, in recent years, a fully-enclosed external fan main motor has been developed in which the main motor main body is hermetically sealed to prevent dust from entering the machine, and the outer fan connected to the rotating shaft blows air to the outer peripheral surface of the main body. Yes.

  As a cooling method for a single control device, a method of cooling a heating element in the control device by combining a heat radiating fin and a heat pipe is generally used. In this cooling method, the heat generated by the heating element is transported to a place where it is exposed to the outside air by a heat pipe or the like, is conducted to a heat radiation fin having a large area, and is cooled by exchanging heat with the outside air from there.

  Conventionally, there are many examples in which this radiating fin occupies about 60% of the control device volume. Therefore, downsizing is an important issue for accommodating the control device in the carriage.

As a cooling method for a vehicle drive device in which an electric motor and a control device are integrated, a control device is provided above the electric motor so that the coolant passes through both the electric motor and the control device. There has been proposed a method of passing the part and the vicinity of the bearing (for example, see Patent Document 1).
JP-A-8-336261 (page 4-8, FIG. 1)

  However, the conventional cooling structure for a vehicle drive device disclosed in Patent Document 1 has the following problems to be solved.

  The coolant transported by an external pump or the like first passes through a duct provided in the stator portion of the electric motor, and then flows to the control device. Then, it returns to the external pump again via the stator part of the electric motor. In the case of such a coolant path, the coolant takes heat first when passing through the stator portion of the electric motor. Therefore, when the coolant reaches the control device, the coolant temperature may have already risen. And the control device cannot be cooled efficiently. Moreover, since it is thought that the temperature of the coolant that recirculates from the control device to the electric motor has already increased, the cooling performance decreases.

  The next problem is that when a circulating flow is applied, a radiator for radiating the warmed coolant is required. Since the heat generated by both the electric motor and the control device is transported to the radiator, a large radiator, a forced air cooling fan, etc. are necessary to obtain sufficient cooling performance, and the vehicle drive unit is large. It will become.

  Another problem is that the pressure loss in the flow path may be large due to the provision of a cooling path that repeats complicated branching / merging and a long path. For this reason, if the cooling liquid is forcibly fed by a pump or the like, there is a possibility that liquid leakage may occur at the connection portion.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vehicle drive device that is small and has good cooling efficiency.

  In order to achieve the above object, a vehicle drive device according to a first aspect of the present invention is arranged to be supported by a main motor having a sealed interior so that there is no circulation of inside air and outside air, and a frame of the main motor. A control device for driving the main motor with a first coolant pipe disposed in the heat generating portion, an outer fan attached to one end of a rotating shaft of the main motor and having radial blades, and the frame An outer fan cover that is supported so as to cover the outer fan, has a first opening for taking in cooling air, and forms a second opening for sending cooling air between the side surface of the frame; A radiator that is provided in the vicinity of the second opening and that exchanges heat with the cooling air and a second coolant pipe that exchanges heat with the radiation fin, and 1 cooling liquid pipe and the second cooling liquid pipe to the outside Piping connected via kicked a pump, is characterized in that the cooling liquid was set to circulate.

  According to a second aspect of the present invention, there is provided a vehicular drive apparatus in which a main motor hermetically sealed so that there is no circulation of inside air and outside air, and the main motor drive disposed and supported by a frame of the main motor. Control device, an outer fan attached to one end of the rotary shaft of the main motor and having radial blades, a first fan that is supported by the frame and covers the outer fan, and takes in cooling air And an outer fan cover that forms a second opening for sending cooling air to the side of the frame, and wind induction for guiding the cooling air from the second opening in the axial direction. A cover, a heat dissipating fin provided at an upper portion of the frame, for exchanging heat with the axial cooling air from the wind guide cover, and a heat dissipating portion of the heat dissipating fin and the control device in a direction perpendicular to the heat dissipating fin. Provided to penetrate It is characterized by comprising a heat pipe had.

  Furthermore, the third invention of the present invention is a main motor hermetically sealed so that there is no circulation between the inside air and the outside air, and is supported by a frame of the main motor, and is arranged at the heat generating portion at the first coolant pipe. A control device for driving the main motor, a drive joint that is attached to both ends of the rotating shaft of the main motor and transmits torque to a driven joint attached to the axle, and a predetermined outer peripheral surface of the drive joint. A plate-like joint fin provided in the radial direction at intervals of the heat sink, a heat dissipating fin that is supported by the frame in the vicinity of the joint fin and exchanges heat with cooling air by rotation of the joint fin, and the heat dissipating fin And a radiator composed of a second coolant pipe for exchanging heat with the pipe, and connecting the first coolant pipe and the second coolant pipe via a pump provided outside, Circulate the coolant It is characterized in that the.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the small vehicle drive apparatus with sufficient cooling efficiency by combining cooling air and a heat radiator appropriately.

  Embodiments of the present invention will be described below with reference to the drawings.

  Hereinafter, a vehicle drive device according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. 1 is a longitudinal sectional view of a vehicle drive device according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of the vehicle drive device shown in FIG.

  The rotor core 4 of the main motor is formed in a cylindrical shape on the outer peripheral portion at the center in the axial direction of the rotary shaft 1. The rotor core 4 is supported by a rotor core presser 6 fixed to the rotary shaft 1 so as to be sandwiched from both side surfaces in the axial direction. A plurality of holes (not shown) are provided in the axial direction on the outer peripheral portion of the rotor core 4, and permanent magnets (not shown) are embedded in the holes. The rotor core 4 and the rotor core retainer 6 are formed with a plurality of circular rotor ducts 5 penetrating both in the axial direction.

  A cylindrical stator 8 formed of a laminated core is provided at a position from the outer peripheral portion of the rotor core 4 via an air gap (air gap). A plurality of grooves are formed in the inner circumferential portion of the stator 8 in the axial direction, and the stator coil 7 is embedded in the grooves. The coil ends of the stator coil 7 protrude in the axial direction from both side surfaces of the stator 8. The outer peripheral portion of the stator 8 is fixedly supported by the inner peripheral portion of the cylindrical frame 10, and the housing 3 is provided at the center of both side surfaces of the frame 10. A bearing 2 is mounted between the housing 3 and the rotating shaft 1. The housing 3 supports the rotary shaft 1 rotatably by a bearing 2.

  An outer fan 12 is provided at one end of the rotating shaft 1 so as to be fixedly supported on the rotating shaft 1. A plurality of radial wings are attached to the outer fan 12 in the radial direction so as to be capable of rotating in both directions of the rotary shaft 1.

  An outer fan cover 11 is fixedly supported on the frame 10 so as to cover the outer fan 12, and has a shape in which a lower part is opened in an inverted U shape. In addition, an outer fan guide port 13 for introducing the wind from the outside of the outer fan cover 11 to the inner side is provided in the center of the side surface of the outer fan cover 11, that is, in the vicinity of the rotating shaft 1. This outer fan induction port 13 is referred to as a first opening.

  An opening for sending cooling air is formed between a lower portion of the outer fan 12, that is, a lower end portion of the outer fan cover 11 and a lower portion of the side surface of the main motor frame 10, and this opening is referred to as a second opening. To do. A radiator that is fixedly supported by the frame 10 and includes the radiation fins 14 and the coolant pipe 15 is provided at a position close to the second opening.

  A control device 9 is installed at a position where it does not interfere with other cart constituent parts above the main motor, and is fixedly supported on the frame 10 of the motor by a support table 16. Further, the control device 9 is provided with a coolant pipe 15A for exchanging heat with the heat generating portion. The cooling liquid pipe 15A is connected to the cooling liquid pipe 15 of the radiator via a circulation pump (not shown) so that the cooling liquid circulates.

  In FIG. 1 and FIG. 2, as indicated by the arrows, the air blown out from the outer fan 12 flows through the outer fan cover 11 to the radiator, but the circular portion of the outer fan cover 11 This is similar to a conventional fully-enclosed external fan type main motor in which a third opening is provided in the outer peripheral portion of the outer fan cover 11 and a part of the wind flows in the longitudinal direction. It is good also as a structure.

  The operational effects of the vehicle drive device according to the first embodiment of the present invention configured as described above will be described below.

  When the main motor is operated with power supplied from the control device 9, the wind sucked from the outer fan guide port 13 is caused by centrifugal force as the outer fan 12 rotates using the rotation of the rotary shaft 1. Blow out from the outer fan 12 in the radial direction. The blown wind flows along the circumference of the outer fan cover 11, passes through the radiator fins 14 of the radiator installed in the vicinity of the second opening at the bottom of the outer fan cover 11, and is exhausted. This air flow is illustrated by arrows in FIGS.

  Since the blades of the outer fan 12 have a radial shape, even if the rotation direction of the main motor is reversed, only the flow of the circumferential portion of the outer fan cover 11 is reversed left and right. The wind flow does not change.

  When a part of the external fan flows in the longitudinal direction of the outer peripheral surface of the main motor, the wind passes around the control device 9 and the outer peripheral surface of the main motor and is exhausted.

  Further, the coolant pushed out from a circulation pump (not shown) passes through the coolant pipe 15 and flows to the cooling pipe 15 </ b> A of the control device 9. The cooling liquid takes the heat generated in the control device 9 by the cooling pipe 15 </ b> A and returns to the cooling liquid pipe 15 again. Since the cooling liquid pipe 15 circulates in the large number of heat dissipating fins 14 of the radiator, the heat of the warmed cooling liquid is conducted to the heat dissipating fins 14, and heat is exchanged and cooled by the cooling air passing between the fins. Thereafter, the coolant again flows into a circulation pump (not shown), and becomes a circulation flow that repeats the same flow.

  Due to the above action, the heat generated in the control device 9 is transported to the radiator by the coolant. In the radiator, the wind blown from the outer fan 12 passes between the radiating fins 14 at a high speed, so that the heat transfer rate is improved and cooling can be performed efficiently.

  In addition, when a part of the wind blown from the outer fan 12 flows in the longitudinal direction of the outer peripheral surface of the main motor, the heat transfer rate from the outer peripheral surface of the main motor and the control device 9 to the outside air is improved, and cooling can be efficiently performed. .

  Since the fan 12 can be forcibly blown to the radiator when the outer fan 12 is used in this way, the cooling efficiency can be improved. Further, the radiator itself can be made small, and the main motor and the control device 9 can be installed even in a narrow carriage.

  FIG. 3A is a longitudinal sectional view of the vehicle drive device according to the second embodiment of the present invention, and FIG. 3B is an AA cross-sectional view of the vehicle drive device shown in FIG.

  In the second embodiment, the same parts as those in the longitudinal sectional view of the vehicle drive device according to the first embodiment of the present invention in FIG. 1 and the AA sectional view in FIG. Omitted. This Example 2 is different from Example 1 in that the diameter of the circular portion of the outer fan cover 11A is increased to be equal to or greater than that of the main motor, the thickness of the outer peripheral portion of the frame 10A of the main motor is increased, and A plurality of ventilation holes 17 penetrating in the axial direction are provided in the outer peripheral portion of the main motor frame 10A.

  By configuring in this way, the cooling fan flows through the ventilation hole 17 from the third opening formed on the side surface of the frame 10A of the main motor by the outer fan cover 11A, that is, the opening of the ventilation hole 17.

  As mentioned in the description of the first embodiment, when the diameter of the circular portion of the outer fan cover 11A is enlarged to be equal to or greater than that of the main motor and a part of the wind flows in the longitudinal direction, the conventional fully-enclosed outer fan main motor is provided. However, in this second embodiment, the main motor frame 10A and the cooling are confined by confining the air flowing in the longitudinal direction (axial direction) around the outer periphery of the main motor within the plurality of ventilation holes 17. It enhances the heat exchange efficiency of the wind and further improves the overall cooling efficiency.

  4 is a longitudinal sectional view of a vehicle drive device according to a third embodiment of the present invention, and FIG. 5 is a cross-sectional view taken along line AA of the vehicle drive device shown in FIG.

  In the third embodiment, the same parts as those in the longitudinal sectional view of the vehicle drive device according to the first embodiment of the present invention in FIG. 1 and the AA sectional view in FIG. Omitted. The third embodiment is different from the first embodiment in that a second opening for sending cooling air is provided between the upper portion of the outer fan 12, that is, the upper end portion of the outer fan cover 11B and the upper side surface of the frame 10 of the main motor. It is the point which provided and the heat radiator which consists of the radiation fin 14B and the cooling fluid pipe | tube 15B was provided in the vicinity of this 2nd opening part. The outer fan cover 11B is fixedly supported on the main motor frame 10 by a support member (not shown).

  Thus, when the heat radiator is provided at the lower part and the upper part of the main motor, the wind blown from the outer fan 12 is divided into the upper part and the lower part by the outer fan cover 11B. The winds flowing in the upper and lower directions pass through the upper radiator and the lower radiator, respectively, and are exhausted. Therefore, according to the third embodiment, since the radiator is arranged at two locations, the upper part and the lower part, the heat radiation area is further increased, and the coolant can be efficiently cooled.

  6 is a longitudinal sectional view of a vehicle drive device according to a fourth embodiment of the present invention, and FIG. 7 is a cross-sectional view taken along line AA of the vehicle drive device shown in FIG.

  Regarding the respective parts of the fourth embodiment, the same parts as those in the longitudinal sectional view of the vehicle drive device according to the first embodiment of the present invention in FIG. 1 and the AA sectional view in FIG. Omitted. The fourth embodiment is different from the first embodiment in that the second opening formed by the outer fan cover 11C is expanded so as to be semicircular along the outer peripheral side surface of the frame 10 of the main motor, and the second opening is formed. This is a point in which a semicircular radiator having a convex upper side composed of the heat radiating plate 14C and the coolant pipe 15C is provided along the portion.

  The positional relationship between the outer fan cover 11C and the radiator is turned upside down so that the second opening at the top of the outer fan cover 11C is semicircular along the outer peripheral side surface of the frame 10 of the main motor. You may make it provide the semicircle-shaped heat radiator with which the lower side which consists of the heat sink 14C and the cooling fluid pipe | tube 15C protrudes along 2 opening parts.

  The radiating fins 14 </ b> C of the radiator are arranged so that the longitudinal direction of the radiating fins coincides in the radial direction from the center of the rotating shaft 1. The length of the radiating fin 14 </ b> C is different at each position, and it is preferable that the radiating fin 14 </ b> C is installed to be as wide as possible along the motor installation allowable space.

  In FIG. 6, the radiating fins 14 </ b> C are arranged radially in the radial direction around the rotating shaft 1, but in order to smoothly flow the air flowing along the outer fan cover 11 </ b> C between the radiating fins 14 </ b> C. In addition, the installation direction may be changed along the ventilation direction.

  The wind blown upward from the outer fan 12 flows in the circumferential direction along the outer fan cover 11C, passes through the radiator, and is exhausted. Further, the wind blown downward from the outer fan 12 flows in the radial direction as it is, passes between the radiation fins 14C of the radiator, and is exhausted.

  By installing the radiator as described above, the heat radiation area can be expanded. Further, since the radiator is installed so as to surround the outer fan 12, the air blown out from the outer fan 12 does not concentrate on a specific portion and passes between the radiation fins 14C evenly. Performance can be improved. Moreover, since only the space where the motor can be installed is used, it can be installed without changing the size of the motor itself.

  FIG. 8 is a longitudinal sectional view of the vehicle drive device according to the fifth embodiment of the present invention, and FIG. 9 is a cross-sectional view taken along line AA of the vehicle drive device shown in FIG.

  Regarding the respective parts of the fifth embodiment, the same parts as those of the longitudinal sectional view of the vehicle drive device according to the first embodiment of the present invention shown in FIG. 1 and the AA sectional view of FIG. Omitted. The fifth embodiment is different from the first embodiment in that the second opening formed by the outer fan cover 11D extends over the entire circumference along the outer peripheral side surface of the frame 10 of the main motor, This is a point in which a donut-shaped radiator including the radiation fins 14D and the coolant pipe 15D is provided along the second opening. In this case, it is preferable that the radiating fins 14 </ b> D are installed radially in the radial direction around the rotation shaft 1.

  With such a configuration, since the radiator is installed so as to surround the outer fan 12, the wind blown from the outer fan 12 passes through the radiator and is exhausted as it is.

  According to the fifth embodiment, since the radiator is installed so as to surround the outer fan 12, the area of the radiator can be increased and the cooling efficiency can be increased. Further, since the wind blown from the outer fan 12 flows evenly through the radiator and passes between the radiator fins 14D, the cooling performance of the entire radiator can be improved.

  FIG. 10 is a perspective view of the vehicle drive device according to the sixth embodiment of the present invention.

  Regarding the respective parts of the sixth embodiment, the same parts as those in the longitudinal sectional view of the vehicle drive device according to the first embodiment of the present invention in FIG. 1 and the AA sectional view in FIG. Omitted. The sixth embodiment is different from the first embodiment in that a radiator including the radiating fins 14E and the coolant pipe 15E is disposed on the upper part of the main motor frame 10, and on the upper part of the outer fan cover 11E. This is a point in which cooling air is passed from the second opening through the wind guide cover 17 to the radiating fin 14E.

  The radiator fins 14E of the radiator are arranged so that the axial direction of the electric motor and the longitudinal direction of the radiator fins 14E substantially coincide with each other so that the wind that has passed through the wind guide cover 17 flows between the radiator fins 14E.

  The coolant pipe 15E is provided in a direction perpendicular to the heat radiating fins 14E.

  In such a configuration, the wind sucked from the outer fan guide port 13 and blown out in the radial direction from the outer fan 12 (not shown) passes between the radiation fins 14E in the longitudinal direction by the wind guide cover 17 and is exhausted.

  Therefore, the heat generated by the control device 9 flows to the radiator via the coolant pipe 15E, and heat is exchanged with the outside air by the radiation fins 14E to be cooled.

  According to the sixth embodiment, since the wind blown from the outer fan 12 flows intensively in the longitudinal direction of the radiator due to the action of the wind guide cover 17, the heat transfer coefficient in the radiating fin 14E is improved and the cooling is efficiently performed. it can. Moreover, since the heat transfer coefficient is high, the radiator itself can be miniaturized.

  FIG. 11 is a perspective view of a vehicle drive device according to a seventh embodiment of the present invention.

  Regarding the respective parts of the seventh embodiment, the same parts as those in the perspective view of the vehicle drive device according to the sixth embodiment of the present invention shown in FIG. Example 7 differs from Example 6 in that a heat pipe 18 is provided instead of the coolant pipe 15E. This heat pipe 18 is extended to the heat generating part in the control device 9. Further, the heat pipe 18 is not installed horizontally, but is inclined so that the radiator side is at a higher position. In this configuration, a circulation pump and piping are not necessary.

  In the above configuration, the heat generated from the control device 9 in the heat pipe 18 evaporates the cooling liquid in the heat pipe and takes the heat, and the steam flows to the radiator and is cooled through the radiator fins 14E of the radiator. The liquid returns to the liquid again, and returns to the control device 9 again by gravity.

  According to the seventh embodiment, since the wind blown from the outer fan 12 flows intensively in the longitudinal direction of the radiator due to the action of the wind guide cover 17, the heat transfer coefficient in the radiating fin 14E is improved and the cooling is efficiently performed. it can. Moreover, since the heat transfer coefficient is high, the radiator itself can be miniaturized.

  FIG. 12 is an axial cross-sectional view of an outer fan fan portion of a vehicle drive device according to an eighth embodiment of the present invention.

  Regarding the respective parts of the eighth embodiment, the same parts as those in the cross-sectional view of the vehicle drive device according to the first embodiment of the present invention shown in FIG. The difference of the eighth embodiment from the first embodiment is that the heat induction frame comprising the heat dissipating fins 14F and the coolant pipe 15F is arranged in the upper part of the main motor, and is provided in a duct shape so as to surround the outer fan 12. The point which was comprised so that the cooling air from 19 might be received, the point which provided several sheets of the air-conditioning board 20 of the shape where cooling air flows equally in a heat sink in the duct part of the wind guide flame | frame 19, the control apparatus 9A, 9B Is placed in an empty space below the main motor. The cooling air inflow opening of the wind guide frame 19 is configured to coincide with a second opening formed by an unillustrated outer fan cover. Further, the control devices 9A and 9B have a configuration in which the control device 9 is divided into two, but it is not always necessary to divide the control device 9 into two as long as it can be accommodated in an empty space on one side.

  In the above configuration, the wind blowing frame 19 installed so as to surround the outer fan 12 through the second opening is the wind blown in the radial direction of the outer fan 12 by centrifugal force as the outer fan 12 rotates. And the flow direction is changed at the duct portion of the wind guide frame 19. Thereafter, the air is diverted by the rectifying plate 20, passes through the radiator, and is exhausted.

  Further, the coolant sent from the circulation pump (not shown) flows through the coolant pipe 15A in the control devices 9A and 9B, and at this time, the heat generated from the control devices 9A and 9B is taken away, and the coolant pipe of the radiator It is transported to 15F. In the radiator, heat is conducted from the coolant pipe 15F to the radiation fins 14F, and heat is exchanged between the radiation fins 14F and the cooling air to be cooled.

  Due to the above action, all the wind blown from the outer fan 12 flows to the radiator by the wind guide frame 19 and flows between the radiating fins 14F at a high speed, so that the heat transfer rate is greatly improved.

  During operation, cooling of the control devices 9A and 9B can be assisted by a configuration in which traveling wind also flows around the control devices 9A and 9B installed in the lower part of the motor.

  FIG. 13: is a longitudinal cross-sectional view in the outer fan fan part of the vehicle drive device which concerns on Example 9 of this invention.

  In the ninth embodiment, the same parts as those in the longitudinal sectional view of the vehicle drive device according to the first embodiment of the present invention shown in FIG. The difference between the ninth embodiment and the first embodiment is that the outer fan 12 and the outer fan cover 11 are omitted, the rotary shaft 1A is a hollow shaft, and drive joints 21A are attached to both ends thereof. Driving joint is provided with an outer driven joint 21B to transmit driving torque, and is fixed to the driven joint 21B and drives the wheels 23 attached to both ends thereof via an axle 22 penetrating the rotating shaft 1A. A radiator composed of a plate-shaped joint fin 24 attached to the outer peripheral surface of 21A in a radial direction at a predetermined interval, and a radiator composed of a heat radiating fin 14G and a cooling liquid pipe 15G are mainly placed at a position where the cooling air of the joint fin 24 hits. It is the point which was set as the structure fixedly supported to the flame | frame 10 of an electric motor. The main motor in this configuration is called a DDM (direct drive motor) type main motor, and the main motor main body is connected to the carriage by a reaction force receiving rod (not shown).

  The shape of the radiator in FIG. 13 is preferably the annular shape shown in FIG. 8, but may be the shape of the vertical separation shown in FIG. 4 or the shape shown in other embodiments.

  In the above configuration, the drive joint 21A rotates with the operation of the main motor, and the joint fin 24 connected to the drive joint 21A also rotates at the same time. When the joint fin 24 rotates, wind flows from around the joint fin 24, and the wind blows out radially outward from the joint fin 24 by centrifugal force. The blown wind passes between the radiation fins 14G of the radiator and is exhausted. The drive joint 21A is disposed on both the left and right sides of the main motor, and performs the same operation on the opposite side.

  As described above, according to the ninth embodiment, the cooling air can be forcibly sent from the drive joint 21A to the radiator even if the main motor has a DDM configuration, and has been transported from the control device 9. Heat can be radiated efficiently. Moreover, since a heat radiator can be arrange | positioned in two places on the right and left of a main motor, cooling efficiency can be improved.

1 is a longitudinal sectional view of a vehicle drive device according to Embodiment 1 of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view taken along line AA of a vehicle drive device according to a first embodiment of the invention. The longitudinal cross-sectional view and AA sectional view of the vehicle drive device which concern on Example 2 of this invention. The longitudinal cross-sectional view of the vehicle drive device which concerns on Example 3 of this invention. AA sectional drawing of the drive device for vehicles concerning Example 3 of the present invention. The longitudinal cross-sectional view of the vehicle drive device which concerns on Example 4 of this invention. AA sectional drawing of the drive device for vehicles concerning Example 4 of the present invention. The longitudinal cross-sectional view of the vehicle drive device which concerns on Example 5 of this invention. AA sectional drawing of the drive device for vehicles concerning Example 5 of the present invention. The perspective view of the vehicle drive device which concerns on Example 6 of this invention. The perspective view of the vehicle drive device which concerns on Example 7 of this invention. Sectional drawing of the vehicle drive device which concerns on Example 8 of this invention. The longitudinal cross-sectional view of the vehicle drive device which concerns on Example 9 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A ... Rotary shaft 2 ... Bearing 3 ... Housing 4 ... Rotor core 5 ... Rotor duct 6 ... Rotor core presser 7 ... Stator coil 8 ... Stator 9, 9A, 9B ... Control device 10 ... Frame 11, 11A, 11B, 11C, 11D ... Outer fan cover 12 ... Outer fan 13 ... Outer fan induction port 14, 14B, 14C, 14D, 14E, 14F, 14G ... Radiating fins 15, 15A, 15B, 15C, 15D, 15E, 15F, 15G ... Coolant Pipe 16 ... Support base 17 ... Wind induction cover 18 ... Heat pipe 19 ... Wind introduction frame 20 ... Air conditioning plate 21A ... Drive joint 21B ... Drive joint 22 ... Axle 23 ... Wheel 24 ... Joint fin

Claims (10)

A main motor that seals the inside of the machine so that there is no circulation of inside air and outside air,
A control device for driving the main motor, which is arranged to be supported by the frame of the main motor, and in which the first coolant pipe is arranged in the heat generating portion;
An outer fan attached to one end of the rotary shaft of the main motor and having radial blades;
An outer portion that is supported by the frame and is provided to cover the outer fan, has a first opening for taking in cooling air, and forms a second opening for sending cooling air to the side of the frame. Fan cover,
A heat dissipating fin provided near the second opening and configured to exchange heat with the cooling air and a second coolant pipe performing heat exchange with the heat dissipating fin;
A vehicle drive device characterized in that the first coolant pipe and the second coolant pipe are connected to each other through a pump provided outside to circulate the coolant. The outer fan cover has a U-shaped cross section,
The vehicle drive device according to claim 1, wherein the second opening is disposed at a lower portion of the outer fan cover.   2. The vehicle drive device according to claim 1, wherein the second opening is provided at an upper portion and a lower portion of the outer fan cover, and the radiator is disposed at an upper portion and a lower portion of the outer fan.   The said 2nd opening part was made into semicircle shape along the outer periphery of the side surface of the said frame, and the said heat radiator was arrange | positioned in semicircle shape along the said 2nd opening part. The vehicle drive device as described.   The said 2nd opening part was made into circular shape along the side surface outer periphery of the said flame | frame, and the said heat radiator was arrange | positioned along the said 2nd opening part in the substantially circular shape, The Claim 1 characterized by the above-mentioned. Vehicle drive system. The radiator is arranged on the upper part of the frame so that the longitudinal direction of the heat radiating fins substantially coincides with the axial direction of the electric motor,
The second opening is provided in the upper part of the outer fan cover, and a wind guide cover for guiding cooling air from the second opening in the axial direction is provided between the second opening and the radiator. The vehicle drive device according to claim 1, wherein the vehicle drive device is provided. The control device is arranged in an empty space below the main motor,
A duct-shaped wind guide frame that guides cooling air from the second opening toward the upper portion of the outer fan is arranged to extend to the outer fan cover,
The radiator is disposed above the upward opening of the wind guide frame;
The vehicle drive device according to claim 1, further comprising an air conditioning plate for allowing cooling air to flow uniformly in the wind guide frame. A main motor that seals the inside of the machine so that there is no circulation of inside air and outside air,
A control device for driving the main motor disposed to be supported by the frame of the main motor;
An outer fan attached to one end of the rotary shaft of the main motor and having radial blades;
An outer portion that is supported by the frame and is provided to cover the outer fan, has a first opening for taking in cooling air, and forms a second opening for sending cooling air to the side of the frame. Fan cover,
A wind guide cover for guiding the cooling air from the second opening in the axial direction;
A heat dissipating fin provided on the upper part of the frame for exchanging heat with the axial cooling air from the wind guide cover;
A vehicle drive device comprising: a heat pipe provided so as to penetrate the heat radiating fin and the heat generating portion of the control device in a direction perpendicular to the heat radiating fin.   A plurality of holes are arranged in the axial direction of the outer peripheral portion of the frame, and cooling air flows in the axial direction of the frame from the third opening of the outer peripheral portion of the outer fan cover. The vehicle drive device according to any one of claims 1 to 8. A main motor that seals the inside of the machine so that there is no circulation of inside air and outside air,
A control device for driving the main motor, arranged to be supported by the frame of the main motor, and having a first coolant pipe in the heat generating portion;
A drive joint for transmitting torque to a driven joint attached to both ends of the rotating shaft of the main motor and attached to the axle;
A plate-like joint fin provided in the radial direction at a predetermined interval on the outer peripheral surface of the drive joint;
A radiator that is provided in the vicinity of the joint fin and supported by the frame, and that includes a radiating fin that exchanges heat with the cooling air generated by the rotation of the joint fin, and a second coolant pipe that exchanges heat with the radiating fin. And
A vehicle drive device characterized in that the first coolant pipe and the second coolant pipe are connected to each other through a pump provided outside to circulate the coolant.

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