JP6433761B2 - DRIVE DEVICE, VEHICLE HAVING THE SAME, AND METHOD FOR MANUFACTURING DRIVE DEVICE - Google Patents

Description

  The present disclosure relates to a drive device, a vehicle including the drive device, and a method for manufacturing the drive device.

  In recent years, development of automobiles that contribute to energy saving, such as hybrid vehicles, electric vehicles, and fuel cell vehicles, has been promoted. These automobiles run using a DC power source such as a battery, an inverter, and a motor as power sources. The inverter converts DC power taken from the DC power source into AC power and supplies the AC power to the motor. Patent document 1 is disclosing the drive device with which the inverter and the motor were integrated.

JP 2005-224008 A

  When the above drive device is mounted on a vehicle such as an automobile, the drive device is operated outdoors, so that countermeasures against flooding inside the drive device are required. In particular, since the above drive device uses a motor as a power source, the drive device vibrates as the motor rotates. For this reason, there is a further need for a measure for suppressing water from entering the interior of the drive device from a slight gap generated between the components of the drive device due to vibration.

  Therefore, the present disclosure describes a drive device that can sufficiently ensure sealing performance, a vehicle including the drive device, and a method for manufacturing the drive device.

  A drive device according to one aspect of the present disclosure includes a first housing portion that houses a motor having a motor shaft connected to an external load, and a first housing portion that is partially in communication with each other and connected to the motor. A second housing portion that houses the motor control unit to be operated, a seal member that seals a communication space between the first housing portion and the second housing portion, and an inner side of a seal region surrounded by the seal member And an internal fastening portion that is located in the communication space and fastens the first and second accommodation portions.

  In the drive device according to one aspect of the present disclosure, the first and second accommodating portions are fastened by the internal fastening portion in a state where the communication space is sealed by the seal member. Therefore, it is possible to sufficiently ensure the sealing performance of the communication space. Moreover, in the drive device according to one aspect of the present disclosure, the internal fastening portion is located inside the sealing region surrounded by the sealing member and in the communication space (inside the first and second accommodating portions). . Therefore, the inside of the 1st and 2nd accommodating part and the exterior are not connected via the internal fastening part. As a result, it is possible to achieve both the secure fastening of the first and second housing portions and the maintenance of the sealing performance of the drive device.

  The drive device according to one aspect of the present disclosure may further include an external fastening portion that is located outside the sealing region and outside the communication space and fastens the first and second accommodation portions.

  In this case, the first and second accommodating portions are more reliably fastened in the vicinity of the seal region by the inner fastening portion and the outer fastening portion. Therefore, it becomes possible to further improve the sealing performance of the drive device.

  Even if the 1st accommodating part and the 2nd accommodating part are combined integrally via the 1st connecting part which the 1st accommodating part has, and the 2nd connecting part which the 2nd accommodating part has. Good.

  In this case, for example, the drive device is mounted on the vehicle such that the first housing portion that houses the heavy motor is positioned below the second housing portion that houses the motor control unit. The battery can be placed in At this time, electrical connection between the battery and the motor control unit can be easily performed.

  The first housing portion and the second housing portion are disposed on the opposite side of the motor shaft from the load-side end portion connected to an external load via the first coupling portion and the second coupling portion. May be combined together.

  In general, the motor wiring is taken out from the opposite side of the load side of the motor shaft. In this case, the wiring is located in the vicinity of the first and second connecting portions. Therefore, the wiring of the motor can be shortened and simplified.

  The first housing portion and the second housing portion may be arranged along a second direction orthogonal to the first direction in which the motor shaft extends.

  When the drive device is mounted on a vehicle such as a vehicle, the drive device is generally positioned with respect to the vehicle such that the motor shaft extends along the width direction of the vehicle. At this time, if the first and second accommodating portions are arranged in the second direction, the size of the driving device in the width direction of the vehicle can be reduced. Therefore, the layout of the driving device for the vehicle is facilitated.

  The first and second accommodating portions are arranged along the vertical direction, and the first and second accommodating portions each have opposing surfaces that are opposed to each other and that extend along the horizontal direction. The fastening by may be performed.

  In this case, since it is difficult for the first and second accommodating portions to be displaced, the first and second accommodating portions can be more easily aligned and fastened when the drive device is manufactured.

  The first connecting portion has a first opening that opens toward the second connecting portion, and the second connecting portion is a second opening that opens toward the first connecting portion. And the first and second openings may correspond to each other so as to form a communication space in a state where the first and second accommodating portions are integrally coupled.

  In this case, a signal line, a conductive member, or the like that connects the motor and the motor control unit can be arranged through the first and second openings. Therefore, there is no need for a space for extending the signal line, the conductive member, and the like between the first and second accommodating portions outside the driving device. Therefore, when the drive device is mounted in the vehicle, the installation space for the drive device with respect to the vehicle can be reduced.

  The seal member may surround the first and second openings from the outside.

  In this case, the first and second openings are present in the seal area. Therefore, it is possible to sufficiently ensure the sealing performance in the first and second openings.

  The first housing portion and the second housing portion are arranged along a second direction orthogonal to the first direction in which the motor shaft extends, and the first and second openings are opposed in the second direction. You may do it.

  When the drive device is mounted on a vehicle such as a vehicle, the drive device is generally positioned with respect to the vehicle such that the motor shaft extends along the width direction of the vehicle. At this time, if the first and second accommodating portions are arranged in the second direction, the size of the driving device in the width direction of the vehicle can be reduced. Therefore, the layout of the driving device for the vehicle is facilitated.

  The motor control unit may be arranged at a position that does not overlap with the first opening when viewed from the second direction.

  In this case, the first opening is not blocked by the motor control unit. Therefore, the operation of electrically connecting the motor control unit and the motor through the first opening and the maintenance of these connection locations can be easily performed.

  At least a part of the first housing portion and the second housing portion are separated from each other on the end side of the load side connected to the external load of the motor shaft from the first and second coupling portions, The 2nd accommodating part may be supported by the support | pillar extended toward the 2nd direction from 1 accommodating part.

  In this case, a space is generated between the first and second accommodating portions. For this reason, an air layer is interposed between the first and second housing portions, and heat is hardly transferred between the motor and the motor control unit. Accordingly, it is possible to further reduce the influence of heat on the motor and the motor control unit.

  The second housing portion houses a capacitor for stabilizing the voltage of the input DC power, and the capacitor is disposed on the side farther from the first opening than the motor control portion, and the capacitor and the motor The control unit is arranged in this order along the first direction in which the motor shaft extends from the load side end connected to the external load of the motor shaft toward the other end side, and is electrically connected in this order. May be.

  In this case, the conductive path between each element in the second accommodating portion can be shortened.

  A conductive member that is inserted through the first and second openings to electrically connect the motor and the motor control unit, and is inserted through the first and second openings and the first storage unit and the second storage unit. A pair of signal lines extending between the first and second openings, and the conductive member may be inserted through the first and second openings so as to be positioned between the pair of signal lines.

  In this case, even when a high current flows at a high voltage through the conductive member, noise is hardly generated in the electric signal flowing through the signal line. Therefore, the possibility that the drive device malfunctions can be suppressed.

  The first storage unit may include a first cooling unit that cools the motor, and the second storage unit may include a second cooling unit that cools the motor control unit.

  In this case, the heat generated in the motor and the motor control unit is absorbed by each of the first and second cooling units and is not easily released to the outside of the drive device. Therefore, it is possible to reduce the influence of heat on the outside of the driving device.

  A waterproof air-permeable filter may be provided in at least one of the first and second accommodating portions.

  In this case, the gas passes inside and outside the driving device through the waterproof ventilation filter, and the atmospheric pressure is kept substantially constant inside and outside the driving device. Therefore, the presence of the waterproof breathable filter makes it possible to maintain the sealing performance while ensuring the water tightness of the driving device.

  The waterproof breathable filter may be provided in each of a plurality of different positions in the first and second accommodating portions.

  In this case, even if the function of one waterproof ventilation filter is reduced or stopped, the waterproof ventilation filter F at another position can function. Therefore, it is possible to obtain a drive device that is stronger against changes in the external environment.

  A vehicle according to another aspect of the present disclosure includes the drive device described above.

  According to another aspect of the present disclosure, a method of manufacturing a drive device includes a first housing portion that houses a motor having a motor shaft that is connected to an external load, and a motor control portion that is connected to the motor. A step of forming a communication space in which the first accommodation portion and the second accommodation portion are partially communicated with each other by arranging a seal member between the second accommodation portion and the second accommodation portion; A first storage part and a second storage part are fastened by an internal fastening part inside the communication area and within the communication space, and the communication space is sealed by a seal member.

  In the method for manufacturing a drive device according to another aspect of the present disclosure, the first and second accommodating portions are fastened by the internal fastening portion in a state where the communication space is sealed by the seal member. Therefore, it is possible to sufficiently ensure the sealing performance of the communication space. In the method for manufacturing a drive device according to another aspect of the present disclosure, the internal fastening portion is located inside the seal region surrounded by the seal member and in the communication space (inside the first and second accommodating portions). doing. Therefore, the inside of the 1st and 2nd accommodating part and the exterior are not connected via the internal fastening part. As a result, it is possible to achieve both the secure fastening of the first and second housing portions and the maintenance of the sealing performance of the drive device.

  According to the driving device, the vehicle including the driving device, and the manufacturing method of the driving device according to the present disclosure, it is possible to sufficiently ensure the sealing performance.

FIG. 1 is a perspective view schematically showing an electric vehicle which is an example of a vehicle according to the present embodiment. FIG. 2 is a block diagram schematically showing the configuration of an electric vehicle that is an example of a vehicle according to the present embodiment. FIG. 3 is a perspective view of the driving device viewed from the winding switching housing portion side. FIG. 4 is a perspective view of the driving device as seen from the motor housing side. FIG. 5 is a side view of the drive device viewed from the direction of arrow A in FIG. FIG. 6 is a side view of the drive device viewed from the direction of arrow B in FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. FIG. 8 is an exploded perspective view of the winding switching housing portion and the motor housing portion. FIG. 9 is an exploded perspective view of the winding switching unit and its housing housing as viewed from the winding switching unit side. FIG. 10 is an exploded perspective view of the winding switching unit and the housing case viewed from the housing case side. FIG. 11 is an exploded perspective view of the inverter accommodating portion. FIG. 12 is a bottom view of the inverter accommodating portion. FIG. 13 is a perspective view of the inverter unit viewed from the lower surface side. FIG. 14 is an exploded perspective view of the terminal unit. FIG. 15 is a diagram illustrating an example of the manufacturing process of the driving device. FIG. 16 is a diagram for explaining the relationship between the torque of the driving device and the rotational speed. FIG. 17 is a cross-sectional view of a driving apparatus according to another example.

  Embodiments of the present invention will be described with reference to the drawings. However, the following embodiments are exemplifications for explaining the present invention and are not intended to limit the present invention to the following contents. In the description, the same reference numerals are used for the same elements or elements having the same function, and redundant description is omitted.

[1] Schematic Configuration of Electric Vehicle An electric vehicle EV which is an example of a vehicle according to the present embodiment will be described with reference to FIG. The electric vehicle EV includes a vehicle body EVa, a VCU (vehicle control unit) 1, a battery (DC power supply) 2, and a drive device 3.

  The battery 2 is a secondary battery that can charge and discharge DC power. Examples of the battery 2 include a lithium ion battery. The drive device 3 is connected to an axle EVb (load) of the vehicle main body EVa. The drive device 3 rotates the drive wheel EVc provided at both ends of the axle EVb by driving the axle EVb. Thereby, the electric vehicle EV travels (forwards or reverses).

[2] Circuit Configuration of Drive Device Next, the circuit configuration of the drive device 3 will be mainly described with reference to FIG. The drive device 3 includes an inverter unit (motor control unit, power conversion unit) 10, a capacitor 12, a motor 14, a winding switching unit 16, and a control unit 18.

  The inverter unit 10 converts the DC power input from the battery 2 into AC power of three phases (U phase, V phase and W phase) and outputs the AC power to the motor 14 (of the power conversion circuit). Example). The inverter unit 10 has terminals TP1 and TN1 connected to the battery 2 and terminals TU1, TV1 and TW1 connected to the motor 14. The terminals TP2 and TN2 of the capacitor 12 are connected to the terminals TP1 and TN1 of the inverter unit 10, respectively. The capacitor 12 has a function of further stabilizing the DC power input from the battery 2 to the inverter unit 10.

  The inverter unit 10 includes switch elements Q1 to Q6 for power conversion. Switch elements Q1, Q2 perform U-phase power conversion. Switch elements Q3 and Q4 perform V-phase power conversion. Switch elements Q5 and Q6 perform W-phase power conversion. The switch elements Q1 to Q6 are each composed of, for example, a semiconductor.

  The motor 14 is driven to rotate based on the three-phase AC power supplied from the inverter unit 10. The motor 14 includes a three-phase winding 14a (first winding, high-speed driving winding) for high-speed driving and a three-phase winding 14b (second winding, low-speed driving winding) for low-speed driving. Line).

  The windings 14a and 14b are electrically connected in series. Terminals TU2, TV2 and TW2 corresponding to the respective phases (U phase, V phase and W phase) are connected to one end side of the winding 14a. Terminals TU2, TV2, and TW2 are connected to terminals TU1, TV1, and TW1 of inverter unit 10, respectively.

  Terminals TU4, TV4, and TW4 corresponding to each phase (U phase, V phase, and W phase) are connected to one end side of the winding 14b. The other end side of the winding 14a and the other end side of the winding 14b are electrically connected to each other (U phase, V phase, and W phase). Between the other end side of the winding 14a and the other end side of the winding 14b, terminals TU3, TV3, and TW3 corresponding to each phase (U phase, V phase, and W phase) are connected.

  The winding switching unit 16 includes a winding switching circuit including diode bridges DB1 and DB2 and switching elements SW1 and SW2. The diode bridge DB1 is electrically connected in parallel with the switch element SW1. The diode bridge DB1 has terminals TU5, TV5, and TW5 connected to terminals TU3, TV3, and TW3 of the motor 14, respectively.

  The diode bridge DB1 includes six diodes D11 to D16 for rectifying the three-phase (U-phase, V-phase, and W-phase) alternating current output from the terminals TU3, TV3, and TW3 of the motor 14. The diodes D11 and D12 rectify U-phase alternating current. Diodes D13 and D14 rectify V-phase alternating current. Diodes D15 and D16 rectify W-phase AC.

  The diode bridge DB2 is electrically connected in parallel with the switch element SW2. The diode bridge DB2 has terminals TU6, TV6, TW6 connected to the terminals TU4, TV4, TW4 of the motor 14, respectively.

  The diode bridge DB2 includes six diodes D21 to D26 for rectifying three-phase (U-phase, V-phase, and W-phase) alternating currents output from the terminals TU4, TV4, and TW4 of the motor 14. Diodes D21 and D22 rectify U-phase alternating current. The diodes D23 and D24 rectify V-phase alternating current. Diodes D25 and D26 rectify W-phase AC.

  The switch element SW1 functions as a high-speed winding switching switch for short-circuiting the terminals TU3, TV3, and TW3 of the motor 14. The switch element SW2 functions as a low-speed winding switching switch for short-circuiting the terminals TU4, TV4, and TW4 of the motor 14. The switch elements SW1 and SW2 are made of, for example, a semiconductor.

  When the terminals TU3, TV3, and TW3 are short-circuited by the switch element SW1, among the winding 14a, the conductor between the terminals TU2 and TU3, the conductor between the terminals TV2 and TV3, and the conductor between the terminals TW2 and TW3 are connected. Is done. When the terminals TU4, TV4, and TW4 are short-circuited by the switch element SW2, among the windings 14a and 14b, a conductor between the terminals TU2 and TU4, a conductor between the terminals TV2 and TV4, and a conductor between the terminals TW2 and TW4 Are connected. That is, the winding switching unit 16 has a function of switching the connection state of the windings 14 a and 14 b of the motor 14.

  The control unit 18 is connected to the VCU 1. The control unit 18 includes a control circuit configured to output control signals (inverter control signal, high-speed winding switching control signal, and low-speed winding switching control signal) to the inverter unit 10 and the winding switching unit 16. The control unit 18 controls switching of the switch elements Q <b> 1 to Q <b> 6 of the inverter unit 10 and controls switching of the switch elements SW <b> 1 and SW <b> 2 of the winding switching unit 16.

[3] Specific Configuration of Drive Device Next, a specific configuration of the drive device 3 will be described with reference to FIGS. The drive device 3 includes a motor housing unit 100, a winding switching housing unit 200, and an inverter housing unit 300.

[3.1] Motor Housing Unit The motor housing unit 100 includes a housing (first housing unit) 102 and a motor 14 as illustrated in FIGS. 3 to 8. The housing 102 includes a main body portion 104 and a connecting portion (first connecting portion) 106. The main body 104 includes a cylindrical body 104a having a substantially cylindrical shape, an end wall 104b disposed on one end side of the cylindrical body 104a, and an end wall 104c disposed on the other end side of the cylindrical body 104a (FIG. 4). FIG. 7 and FIG. 8). The housing 102 (main body 104) houses the motor 14 in a housing space surrounded by the cylinder 104a and the end walls 104b and 104c.

  As shown in FIG. 7, the stator 14c of the motor 14 is fixed to the inner wall of the cylindrical body 104a. As shown in FIGS. 4, 7, and 8, a through hole H <b> 1 is formed in each of the end walls 104 b and 104 c in a region that intersects the central axis of the main body 104. As shown in FIG. 7, the motor shaft 14d of the motor 14 is attached to these through holes H1 via bearings 104d. Therefore, the motor shaft 14 d extends in substantially the same direction as the central axis of the main body portion 104. Hereinafter, the extending direction of the motor shaft 14d may be referred to as “X-axis direction”.

  An end E1 (see FIGS. 4 to 7) on the end wall 104b side of the motor shaft 14d is exposed to the outside of the main body 104 from the through hole H1 of the end wall 104b. The end E1 of the motor shaft 14d is connected to the axle EVb of the electric vehicle EV. Therefore, the end E1 of the motor shaft 14d is an end on the load side to which an external load such as the axle EVb or the drive wheel EVc is connected. On the other hand, the end E2 (see FIG. 7) on the end wall 104c side of the motor shaft 14d is an end opposite to the load. A rotor 14e is fixed around the motor shaft 14d. The rotor 14e is located inside the stator 14c.

  As shown in FIGS. 3, 5, and 8, the cylindrical body 104 a includes a flow path (first cooling unit) 104 e through which the coolant flows. The flow path 104e is formed in the wall of the cylindrical body 104a so as to surround the motor 14. The cylindrical body 104a is formed with through holes H2 and H3 that communicate the flow path 104e with the outside. The through hole H2 is connected to the cooling pipe CP1. In a state where the drive device 3 is mounted on the electric vehicle EV, the cooling pipe CP1 is connected to, for example, a radiator of the electric vehicle EV. The through hole H3 is connected to a flow path 104g provided in the peripheral wall of the cylindrical body 104a. The flow path 104g extends toward the winding switching housing portion 200 in the X-axis direction.

  As shown in FIGS. 3 to 8, a plurality of support columns 104 f are provided on the outer peripheral surface of the cylindrical body 104 a. The support column 104f is a member for supporting the inverter housing portion 300. The support column 104f is located on the end E1 side of the motor shaft 14d on the outer peripheral surface of the cylindrical body 104a. The support column 104f extends in a direction orthogonal to the X-axis direction and toward the inverter accommodating unit 300. Hereinafter, the direction in which the column 104f extends is referred to as the “Z-axis direction”.

  As shown in FIG. 7, through holes H4 and H5 are formed in the end wall (bracket) 104c. In the end wall 104c, the through holes H4, H1, and H5 are arranged in this order in the Z-axis direction. That is, the through hole H1 is located between the through holes H4 and H5. The through hole H4 is located closer to the inverter accommodating portion 300 than the through hole H1. The through hole H5 is located on the side farther from the inverter accommodating portion 300 than the through hole H1.

  The connection part 106 is provided in the outer peripheral surface of the cylinder 104a, as FIGS. 3-8 shows. The connecting portion 106 is located on the end portion E2 side of the motor shaft 14d and on the inverter accommodating portion 300 side in the outer peripheral surface of the cylindrical body 104a. The connecting portion 106 has a bottomed cylindrical shape, and has an opening (first opening) 106a (see FIGS. 7 and 8) that is open outward. A region surrounding the opening 106a in the connecting portion 106 functions as an opposing surface OS1 (see FIG. 8) that faces the inverter accommodating portion 300 (a connecting portion 522 described later). That is, the facing surface OS1 defines the opening 106a. The connecting portion 106 protrudes on the opposite side of the end portion E1 from the end wall 104c in the X-axis direction.

  A communication hole H <b> 6 (see the same figure) that communicates with the inside of the main body 104 is formed in the bottom wall of the connection part 106. One end (not shown) of the winding corresponding to each phase (U phase, V phase, and W phase) of the winding 14a is inserted into the communication hole H6. One end of these windings inserted into the communication hole H6 is drawn out into the connecting portion 106.

  A terminal unit 400 (see the figure) is provided on the bottom wall of the connecting portion 106. The terminal unit 400 includes a base 402 and three bus bars (conductive members) 404U, 404V, and 404W. Each of the bus bars 404U, 404V, 404W is formed of a metal flat plate and has a crank shape when viewed from a direction parallel to the main surface of the bus bars 404U, 404V, 404W. The bus bars 404U, 404V, 404W are attached on the pedestal 402. The bus bars 404U, 404V, 404W are arranged in a direction orthogonal to both the X-axis direction and the Z-axis direction. Hereinafter, the direction in which the bus bars 404U, 404V, and 404W are arranged is referred to as a “Y-axis direction”.

  One ends of the bus bars 404U, 404V, and 404W are located in the vicinity of the communication hole H6. One end of each of the bus bars 404U, 404V, and 404W is connected to one end of the winding 14a drawn into the connecting portion 106, respectively. Specifically, one end of the bus bar 404U is connected to one end corresponding to the U phase in the winding 14a. One end of the bus bar 404V is connected to one end corresponding to the V phase of the winding 14a. One end of the bus bar 404W is connected to one end corresponding to the W phase of the winding 14a.

  The other ends of the bus bars 404U, 404V, and 404W extend in the Z-axis direction toward the inverter accommodating portion 300 side. Therefore, the other ends of the bus bars 404U, 404V, and 404W are exposed to the outside of the connecting portion 106.

  Connectors 108 and 110 are provided on the bottom wall of the connecting portion 106 as shown in FIG. The connectors 108 and 110 are exposed to the outside of the connecting portion 106. The connector 108, the terminal unit 400, and the connector 110 are arranged in this order in the Y-axis direction. That is, the terminal unit 400 is located between the connector 108 and the connector 110.

  The connector 108 is connected to a resolver (not shown) that detects the rotation angle of the motor 14 by a resolver signal line SG1 (see FIG. 2). The resolver is disposed in the main body portion 104. Therefore, the resolver signal line SG1 extends from the connecting portion 106 into the main body portion 104 through the communication hole H6. The connector 110 is connected to the winding switching unit 16 by a winding switching signal line SG2 (see FIG. 2).

[3.2] Winding switching housing portion As shown in FIGS. 3 to 8, the winding switching housing portion 200 has a bolt (see FIGS. 3 and 5) at the end of the cylindrical body 104 a on the end wall 104 c side. And FIG. 6). Therefore, the winding switching housing part 200 is detachably and integrally coupled to the motor housing part 100.

  The winding switching housing part 200 is disposed outside the motor housing part 100 and on the end E2 side of the motor shaft 14d. The winding switching housing part 200 overlaps the motor housing part 100 in the X-axis direction. The winding switching housing unit 200 includes a housing (third housing unit) 202 and a winding switching unit 16.

  The housing case 202 includes a main body portion 204 and a lid portion 206. The main body 204 has a bottomed cylindrical shape with one side opened. That is, the main body 204 is provided so as to extend along the opening 204a (see FIGS. 7 to 9) opened outward, the bottom wall 204b having a flat plate shape, and the periphery of the bottom wall 204b. Side wall 204c.

  The opening 204a is configured by an edge on the open end side of the side wall 204c. A lid 206 that closes the opening 204a is fixed to the opening 204a by a bolt (see FIGS. 3, 5, and 6). In a state in which the lid portion 206 is attached to the opening 204 a, a space surrounded by the main body portion 204 and the lid portion 206 is a housing space that houses the winding switching unit 16.

  The bottom wall 204b is fixed to the end of the cylindrical body 104a on the end wall 104c side by bolts (see FIGS. 3, 5, and 6). Therefore, one main surface 204d of the bottom wall 204b faces the end wall 104c of the motor housing portion 100 in the completed state of the drive device 3, as shown in FIG. As shown in FIGS. 7 and 9, a recess 204f is formed on the other main surface 204e of the bottom wall 204b. The recess 204f is recessed toward the side away from the opening 204a, that is, toward the main surface 204d. The long side of the recess 204f extends along the Y-axis direction.

  As shown in FIG. 9, the bottom wall 204b has flow paths 204g and 204h through which the coolant flows. The flow paths 204g and 204h are formed in the wall of the bottom wall 204b and extend along the Y-axis direction.

  One end of the flow path 204g communicates with a region on one end side in the Y-axis direction of the recess 204f. The other end of the flow path 204g is connected to the flow path 104g in the completed state of the driving device 3, as shown in FIGS. One end of the channel 204h communicates with a region on the other end side in the Y-axis direction of the recess 204f. As shown in FIGS. 4 and 6, the other end of the flow path 204 h is connected to the cooling pipe CP <b> 2 in the completed state of the driving device 3.

  Through holes H7 and H8 are formed in the bottom wall 204b. The through hole H7, the recess 204f, and the through hole H8 are arranged in this order in the Z-axis direction. Therefore, the recess 204f is located between the through hole H7 and the through hole H8. The through hole H7 is located closer to the inverter accommodating part 300 than the recessed part 204f. The through hole H8 is located on the side farther from the inverter accommodating portion 300 than the recess 204f.

  In the completed state of the drive device 3, as shown in FIG. 7, the through hole H7 faces and communicates with the through hole H4 of the motor housing portion 100. Terminals TU3, TV3, and TW3 (see FIG. 2) drawn from the end E2 side of the motor shaft 14d of the motor 14 are inserted into the through holes H4 and H7. The tips of the terminals TU3, TV3, and TW3 are drawn out into the housing case 202.

  In the completed state of the driving device 3, as shown in FIG. 7, the through hole H8 faces and communicates with the through hole H5 of the motor housing portion 100. Terminals TU4, TV4, TW4 (see FIG. 2) drawn from the end E2 side of the motor shaft 14d of the motor 14 are inserted into the through holes H5, H8. The tips of the terminals TU4, TV4, and TW4 are drawn out into the housing case 202.

  As shown in FIGS. 8 and 9, the winding switching unit 16 is fixed to the bottom wall 204 b with bolts (not shown). As shown in FIG. 10, the winding switching unit 16 includes a circuit body 16 a having a flat plate shape and fins 16 b. In the present embodiment, the circuit main body 16a and the fins 16b are integrated, but these may not be integrated. Alternatively, the winding switching unit 16 may be one in which the circuit body unit 16a and a heat sink having the fins 16b are integrally connected (modularized). That is, the water cooling method of the circuit body 16a (winding switching unit 16) may be a direct water cooling method or an indirect water cooling method.

  The circuit body 16a incorporates the above-described winding switching circuit. The circuit body 16a is connected to the connector 110 by a winding switching signal line SG2. As shown in FIG. 9, three terminals TU5, TV5, TW5 and three terminals TU6, TV6, TW6 are arranged on one main surface 16c of the circuit body 16a along the Y-axis direction. ing.

  The terminals TU5, TV5, and TW5 are located closer to the inverter accommodating portion 300 in the periphery of the circuit body portion 16a. Terminals TU5, TV5, and TW5 are electrically and physically connected to the tips of terminals TU3, TV3, and TW3 by bolts (not shown), respectively. The terminals TU6, TV6, and TW6 are located on the side of the peripheral edge of the circuit body 16a that is away from the inverter housing 300. Terminals TU6, TV6, TW6 are electrically and physically connected to the tips of terminals TU4, TV4, TW4 by bolts (not shown), respectively.

  As shown in FIG. 9, the other main surface 16d of the circuit body 16a faces the recess 204f and covers the recess 204f. Therefore, a space surrounded by the circuit body 16a and the recess 204f constitutes a flow path (third cooling section) 16g (see FIG. 7) through which the coolant flows.

  The channel 16g extends in the same direction (Y-axis direction) as the direction in which the recess 204f extends. One end of the channel 16g is connected to the channel 204g. The other end of the flow path 16g is connected to the flow path 204h. The flow path 16g is located between the circuit body 16a and the motor housing 100.

  The fin 16b protrudes outward from the other main surface 16d of the circuit body 16a (see FIGS. 7 and 10). The fin 16b is located in the flow path 16g in a state where the winding switching unit 16 is attached to the bottom wall 204b. When the cooling liquid flows through the flow path 16g, the cooling liquid comes into contact with the fins 16b located in the flow path 16g, and heat dissipation from the fins 16b (circuit body portion 16a) is promoted. That is, the fin 16b functions as a member for radiating the heat of the circuit body 16a to the outside.

[3.3] Inverter housing portion The inverter housing portion 300 is mounted on the motor housing portion 100 as shown in FIGS. The inverter housing part 300 is supported by the connecting part 106 of the motor housing part 100 and the plurality of columns 104f. The inverter housing unit 300 includes a housing case (second housing unit) 500, a control unit 18, a capacitor unit 600, an inverter unit 10, and a terminal unit 700.

  As shown in FIGS. 11 and 12, the housing case 500 includes an opening (a housing port) 500 a that opens toward the opposite side of the motor housing portion 100 in the completed state of the driving device 3, and a motor housing. And an opening 500b opened toward the portion 100 side. As shown in FIGS. 3 to 7 and 11, the housing case 500 includes a main body portion 502 and a lid portion 504. The main body 502 includes a bottom wall 510, a side wall 512, and a mounting bracket 514.

  The side wall 512 is provided on the bottom wall 510 so as to protrude from the bottom wall 510 toward the side opposite to the motor housing portion 100 (the lid portion 504 side). An end edge (open end) of the side wall 512 forms an opening 500a. The side wall 512 includes a pair of wall portions 512a and 512b facing each other in the X-axis direction and a pair of wall portions 512c and 512d facing each other in the Y-axis direction. Both the wall portions 512a and 512b are adjacent to the wall portions 512c and 512d.

  As shown in FIGS. 3 and 11, through holes H <b> 9 and H <b> 10 that penetrate the inside and outside of the housing case 500 are formed in the wall portion 512 c. The through hole H9 is located closer to the wall portion 512a in the wall portion 512c. A waterproof ventilation filter F that allows gas (for example, air) to pass but does not allow liquid (for example, water) to pass through is attached to the through hole H9 (see FIGS. 3 and 5). The through hole H10 is located closer to the wall portion 512b in the wall portion 512c. A cooling pipe CP3 is connected to the through hole H10 (see FIGS. 3 and 5). In a state where the drive device 3 is mounted on the electric vehicle EV, the cooling pipe CP3 is connected to, for example, a radiator of the electric vehicle EV.

  As shown in FIGS. 4 and 12, through holes H <b> 11 and H <b> 12 that penetrate the inside and outside of the housing 500 are formed in the wall 512 d. The through hole H11 is located closer to the wall portion 512a in the wall portion 512d. A wiring port GR is attached to the through hole H11 (see FIGS. 4 and 6). The through hole H12 is located closer to the wall portion 512a in the wall portion 512d. A cooling pipe CP4 is connected to the through hole H12 (see FIGS. 4 and 6). The cooling pipe CP4 is connected to the cooling pipe CP2 of the winding switching housing portion 200 by the cooling pipe CP5.

  The mounting bracket 514 is located in the middle of the walls 512a and 512b in the X-axis direction. The mounting bracket 514 extends along the Y-axis direction so as to expand in a direction orthogonal to the Z-axis direction. The mounting bracket 514 is placed on a plurality of support columns 516 provided on the bottom wall 510 so as to protrude from the bottom wall 510 toward the side opposite to the motor housing portion 100 (the lid portion 504 side). The mounting bracket 514 is fixed to the support column 516 with a bolt (not shown). Therefore, a space exists between the mounting bracket 514 and the bottom wall 510. There is a space between the mounting bracket 514 and the lid 504.

  A concave portion DP that is recessed toward the motor housing portion 100 is formed in a region 510a of the bottom wall 510 that overlaps the mounting bracket 514 in the Z-axis direction. As shown in FIG. 11, the recess DP has a bottom wall DPa and side walls provided on the bottom wall DPa so as to protrude from the bottom wall DPa toward the side opposite the motor housing portion 100 (the lid portion 504 side). It is comprised by DPb and the opening part DPc open | released toward the cover part 504 side. The opening portion DPc is configured by an end edge on the lid portion 504 side of the side wall DPb. The recessed portion DP extends between the wall portion 512c and the wall portion 512d along the Y-axis direction. Through holes H10 and H12 communicate with the recess DP (see FIG. 11).

  A region 510b on the end E2 side of the motor shaft 14d in the bottom wall 510 constitutes a connecting portion (second connecting portion) 522 as shown in FIG. The connecting portion 522 is fixed to the connecting portion 106 with bolts BT1 and BT2 (see FIGS. 3 to 6 and 15) in the completed state of the driving device 3. The connecting portion 522 has an opening (second opening) 500b. A region surrounding the opening 500b in the connecting portion 522 functions as an opposing surface OS2 (see FIG. 12) that faces the motor housing portion 100 (connecting portion 106). That is, the facing surface OS2 defines the opening 500b. The opening part 500b is located between the wall part 512a and the recessed part DP in the X-axis direction. The opening 500b faces the opening 500d in the Z-axis direction. The opening 500b is located closer to the end E2 side of the motor shaft 14d than the flow path 10h described later.

  The opening 500b corresponds to the opening 106a in the completed state of the driving device 3. Specifically, as shown in FIG. 7, in the Z-axis direction, the opening 500b is positioned so as to overlap the opening 106a, and faces the opening 106a. Therefore, the other ends of the bus bars 404U, 404V, and 404W exposed to the outside of the connecting portion 106 and the connectors 108 and 110 are located in the housing case 500 through the opening portion 500b.

  A seal member SE (for example, an O-ring) is interposed between the connecting portion 522 (opening portion 500b) and the connecting portion 106 (opening portion 106a) (see FIG. 7). The seal member SE extends along the periphery of the openings 500b and 106a outside the openings 500b and 106a. That is, a region (seal region) SR (see FIGS. 8 and 12) surrounded by the seal member SE surrounds the openings 500b and 106a from the outside. The seal region SR has a rectangular shape extending in the Y-axis direction. Inside the seal region SR, the internal spaces (communication spaces) of the housings 102 and 500 are sealed between the connecting portion 522 (opening portion 500b) and the connecting portion 106 (opening portion 106a). That is, sufficient sealing performance is ensured in the openings 500b and 106a existing in the seal region SR.

  In the connecting portion 522, a bolt hole BH1 penetrating the connecting portion 522 is formed inside the seal region SR (see FIGS. 12 and 15). The bolt holes BH1 are arranged along a side of the seal region SR that overlaps the internal space of the housing case 500 when viewed from the Z-axis direction. A bolt hole BH2 is formed in the connecting portion 106 inside the seal region SR (see FIG. 8). The position of the bolt hole BH2 corresponds to the position of the bolt hole BH1 in a state where the connecting portion 522 is attached to the connecting portion 106. The bolt BT1 and the bolt holes BH1 and BH2 constitute a fastening portion (internal fastening portion) for fastening the lid portion 508 and the connecting portion 522 (motor housing portion 100). Both the bolt BT1 and the bolt holes BH1 and BH2 are located inside the seal region SR and in the internal space of the housings 102 and 500.

  In the connecting portion 522, a bolt hole BH3 penetrating the connecting portion 522 is formed outside the seal region SR (see FIGS. 12 and 15). The bolt holes BH3 are arranged along the side of the seal region SR that does not overlap the internal space of the housing case 500 when viewed from the Z-axis direction. A bolt hole BH4 is formed in the connecting portion 106 inside the seal region SR (see FIG. 8). The position of the bolt hole BH4 corresponds to the position of the bolt hole BH3 in a state where the connecting portion 522 is attached to the connecting portion 106. The bolt BT2 and the bolt holes BH3 and BH4 constitute a fastening portion (external fastening portion) for fastening the lid portion 508 and the connecting portion 522 (motor housing portion 100). Both the bolt BT2 and the bolt holes BH3 and BH4 are located outside the seal region SR and outside the internal space of the housings 102 and 500. The bolts BT1 and BT2 are arranged along the periphery of the seal region SR. Similarly, the bolt holes BH1 to BH4 are also arranged along the periphery of the seal region SR.

  A portion of the bottom wall 510 other than the connecting portion 522 (a portion of the bottom wall 510 closer to the end E1 of the motor shaft 14d than the connecting portion 522) 524 is fixed to the column 104f by a bolt BT3 (FIG. 3). (See FIG. 6). A bolt hole BH5 penetrating the lid portion 508 is formed in the bottom wall 510 at a position corresponding to the column 104f (see FIGS. 11 and 14). A bolt hole BH6 is formed at the top of the column 104f (see FIG. 8). The bolt BT3 and the bolt holes BH5 and BH6 constitute a fastening portion for fastening the support column 104f (motor housing portion 100) and the bottom wall 510 (main body portion 502). That is, the bolt BT3 and the bolt holes BH5 and BH6, together with the bolts BT1 and BT2 and the bolt holes BH1 to BH4, integrally connect the inverter housing part 300 and the motor housing part 100 so as to be removable. Both the bolt BT3 and the bolt holes BH5 and BH6 are located outside the seal region SR and outside the internal space of the housing case 500.

  The portion 524 overlaps the housing 102 in the Z-axis direction. The portion 524 is separated from the housing 102 due to the presence of the column 104f. Therefore, a space V exists between the portion 524 in the Z-axis direction and the housing 102 as shown in FIGS.

  As shown in FIGS. 3 to 7, the lid portion 504 is fixed to the opening portion 500a with a bolt so as to close the opening portion 500a. Therefore, the lid portion 504 is detachably and integrally coupled to the main body portion 502. A space surrounded by the main body portion 502 and the lid portion 504 is a housing space (internal space of the housing housing 500) that houses the control unit 18, the capacitor unit 600, the inverter unit 10, and the terminal unit 700.

  The control unit 18 incorporates the above-described control circuit. As shown in FIG. 11, the control unit 18 is fixed on the mounting bracket 514 with bolts (not shown). The control unit 18 is disposed in a space between the mounting bracket 514 and the lid 504. The controller 18 does not overlap with the openings 106a and 500b in the Z-axis direction. A signal input / output unit 18 a is provided on the main surface of the control unit 18. The signal input / output unit 18a is a member that mediates transmission / reception of signals between the outside and the control circuit. The signal input / output unit 18a is located on the main surface of the control unit 18 near the wall 514a, that is, near the end E2 of the motor shaft 14d in the X-axis direction.

  A signal line SG3 (see FIG. 2) is connected to the signal input / output unit 18a. Therefore, the control unit 18 is connected to the VCU 1 through the signal input / output unit 18a and the signal line SG3. The signal line SG3 extends in and out of the housing case 500 through the wiring inlet / outlet GR attached to the through hole H11.

  The control unit 18 is electrically connected to the resolver of the motor 14 through the connector 108 by the resolver signal line SG1. The resolver signal line SG1 extends from the control unit 18 toward the opening 500b in the housing case 500. The control unit 18 receives a resolver signal from the resolver.

  The control unit 18 is electrically connected to the winding switching unit 16 (circuit main body unit 16a) through the connector 110 by the winding switching signal line SG2. The winding switching signal line SG2 extends from the control unit 18 toward the opening 500b in the housing case 500. The control unit 18 transmits a winding switching signal to the winding switching unit 16 (circuit main body unit 16a).

  As shown in FIG. 11, the capacitor unit 600 is disposed in a region 510c on the end E1 side of the motor shaft 14d in the bottom wall 510. Capacitor unit 600 includes capacitor 12, bus bars (input units) 604p, 606n, bus bars 604u, 604v, 604w, 606u, 606v, 606w, and bus bars (power supply connection units) 608, 610. These bus bars are made of metal flat plates.

  The bus bars 604p, 604u, 604v, and 604w are connected to the positive electrode of the capacitor 12. The bus bars 606n, 606u, 606v, 606w are connected to the negative electrode of the capacitor 12.

  The bus bars 604p and 606n are arranged in this order in the Y-axis direction. The bus bars 604u, 604v, and 604w are arranged in this order in the Y-axis direction. The bus bars 606u, 606v, and 606w are arranged in this order in the Y-axis direction.

  The base end of the bus bar 608 is connected to the front end of the bus bar 604p. Therefore, the bus bars 606 and 608 and the positive electrode of the capacitor 12 are electrically connected. The bus bar 608 functions as terminals TP1 and TP2 (see FIG. 2).

  The base end of the bus bar 610 is connected to the front end of the bus bar 606n. Therefore, the bus bars 606 and 610 and the negative electrode of the capacitor 12 are electrically connected. The bus bar 610 functions as terminals TN1 and TN2 (see FIG. 2).

  The ends of the bus bars 608 and 610 are exposed to the outside of the housing case 500 through the opening 500b as shown in FIGS. The battery 2 is electrically connected to the ends of the bus bars 608 and 610 exposed to the outside. The battery 2 is mounted on the lid 504 of the housing case 500, for example.

  As shown in FIG. 11, the inverter unit 10 is fixed on a region 510 a of the bottom wall 510 by bolts (not shown). The inverter unit 10 is disposed in a space between the region 510 a of the bottom wall 510 and the mounting bracket 514. The inverter unit 10 does not overlap the openings 106a and 500b in the Z-axis direction. The inverter unit 10 includes a power module made of a semiconductor. Such a power module includes, for example, a circuit body 10a and fins 10b. In the present embodiment, the circuit body 10a and the fins 10b are integrated, but they may not be integrated. Alternatively, the inverter unit 10 may be one in which the circuit body unit 10a and a heat sink having the fins 10b are integrally connected (modularized). That is, the water cooling method of the circuit body 10a (power module) may be a direct water cooling method or an indirect water cooling method.

  The circuit body 10a incorporates the power conversion circuit described above. The circuit body 10a includes a U-phase part (first phase part) 10U, a V-phase part (second phase part) 10V, and a W-phase part (third phase part) 10W. U-phase unit 10 </ b> U converts the DC power input from battery 2 into U-phase AC power of motor 14. V-phase unit 10 </ b> V converts DC power input from battery 2 into V-phase AC power of motor 14. W-phase unit 10 </ b> W converts DC power input from battery 2 into W-phase AC power of motor 14. The U-phase portion 10U, the V-phase portion 10V, and the W-phase portion 10W are arranged in this order in the Y-axis direction.

  Six terminals TPU, TNU, TPV, TNV, TPW, and TNW are arranged in this order along the Y-axis direction on one main surface 10d of the circuit body 10a. Terminals TPU, TNU, TPV, TNV, TPW, and TNW are located near the capacitor unit 600 on the periphery of the circuit body 10a.

  Terminals TPU and TNU are adjacent to U-phase portion 10U in the X-axis direction, and are electrically connected to U-phase portion 10U. The terminal TPU and the terminal TNU are adjacent to each other in the Y-axis direction. The terminal TPU is physically and electrically connected to the bus bar 604u of the bus bar 604 by a bolt (not shown). The terminal TNU is physically and electrically connected to the bus bar 606u of the bus bar 606 by a bolt (not shown).

  Terminals TPV and TNV are adjacent to V-phase portion 10V in the X-axis direction, and are electrically connected to V-phase portion 10V. The terminal TPV and the terminal TNV are adjacent to each other in the Y-axis direction. The terminal TPV is physically and electrically connected to the bus bar 604v of the bus bar 604 by a bolt (not shown). The terminal TNV is physically and electrically connected to the bus bar 606v of the bus bar 606 by a bolt (not shown).

  Terminals TPW and TNW are adjacent to W-phase portion 10W in the X-axis direction, and are electrically connected to W-phase portion 10W. The terminal TPW and the terminal TNW are adjacent to each other in the Y axis direction. The terminal TPW is physically and electrically connected to the bus bar 604w of the bus bar 604 by a bolt (not shown). The terminal TNW is physically and electrically connected to the bus bar 606w of the bus bar 606 by a bolt (not shown).

  Three terminals TU1, TV1, and TW1 are arranged in this order along the Y-axis direction on one main surface 10c (see FIGS. 7 and 11) of the circuit body 10a. The terminals TU1, TV1, and TW1 are located near the terminal unit 700 on the periphery of the circuit body 10a.

  Terminal TU1 is adjacent to U-phase portion 10U in the X-axis direction, and is electrically connected to U-phase portion 10U. Terminal TV1 is adjacent to V-phase portion 10V in the X-axis direction, and is electrically connected to V-phase portion 10V. Terminal TW1 is adjacent to W-phase portion 10W in the X-axis direction, and is electrically connected to W-phase portion 10W.

  As shown in FIGS. 7 and 11, the other main surface 10 d of the circuit body 10 a faces the recess DP and covers the recess DP. Therefore, the space surrounded by the circuit body 10a and the recess DP constitutes a flow path (second cooling section) 10h (see FIG. 7) through which the coolant flows.

  The flow path 10h extends in the same direction (Y-axis direction) as the direction in which the recessed portion DP extends. Therefore, the direction in which the flow path 10h extends is substantially the same as the direction in which the U-phase portion 10U, the V-phase portion 10V, and the W-phase portion 10W are arranged. Both ends of the flow path 10h are connected to the through holes H10 and H12, respectively. The flow path 10 h is located between the inverter unit 10 and the motor 14. In the present embodiment, as shown in FIG. 7, the motor 14, the flow path 104e, the space V, the flow path 10h, and the inverter unit 10 are arranged in this order along the Z-axis direction.

  As shown in FIG. 13, the fin 10 b protrudes outward from the other main surface 10 d of the circuit body 10 a. The fin 10b is located in the flow path 10h in a state where the inverter unit 10 is attached to the recess DP (bottom wall 510). When the cooling liquid flows through the flow path 10h, the cooling liquid comes into contact with the fins 10b located in the flow path 10h, and heat dissipation from the fins 10b (the circuit body 10a) is promoted. That is, the fin 10b functions as a member for dissipating the heat of the circuit body 10a to the outside.

  In the present embodiment, a gate drive circuit GD is provided in the vicinity of the inverter unit 10. For example, as illustrated in FIG. 11, the gate drive circuit GD is attached on the main surface 10c side of the circuit body 10a. The gate drive circuit GD is electrically connected to the control unit 18 in the housing case 500 through the signal line SG4 (see FIG. 2). An inverter control signal is input from the control unit 18 to the gate drive circuit GD via the signal line SG4. Based on the inverter control signal, the gate drive circuit GD generates a gate signal for turning on / off the switch elements Q1 to Q6 constituting the power conversion circuit of the circuit body 10a.

  The gate drive circuit GD is attached to the circuit body 10a on the main surface 10c side of the circuit body 10a. The gate drive circuit GD is electrically connected to the circuit body 10a. The gate signal generated by the gate drive circuit GD is transmitted to the circuit body 10a.

  As shown in FIGS. 11 and 14, the terminal unit 700 includes a base 702, three bus bars (conductive members) 704 U, 704 V, and 704 W, and a sensor unit 706. As shown in FIG. 14, the base 702 includes groove portions 702a to 702c corresponding to the shapes of the bus bars 704U, 704V, and 704W. The groove portions 702a to 702c are arranged in this order in the Y-axis direction.

  The bus bars 704U and 704W are both configured in a crank shape when viewed from the X-axis direction and the Y-axis direction. The bus bar 704V has a crank shape when viewed from the Y-axis direction. Each of the bus bars 704U, 704V, and 704W is mounted on the base 702 while being accommodated in the groove portions 702a to 702c. Therefore, the bus bars 704U, 704V, and 704W are arranged in this order in the Y-axis direction.

  As shown in FIG. 11, one end of each of the bus bars 704U, 704V, and 704W is physically and electrically connected to terminals TU1, TV1, and TW1 of the circuit body 10a by bolts. The other ends of the bus bars 704U, 704V, and 704W are physically and electrically connected to the other ends of the bus bars 404U, 404V, and 404W by bolts. Therefore, the bus bars 404U and 704U constitute a conductive wire between the terminal TU1 and the terminal TU2 shown in FIG. The bus bars 404V and 704V constitute a conductive wire between the terminal TV1 and the terminal TV2 shown in FIG. The bus bars 404W and 704W constitute a conductive wire between the terminal TW1 and the terminal TW2 shown in FIG.

  As shown in FIG. 14, the sensor unit 706 includes current measuring units 706U, 706V, and 706W. The current measuring units 706U, 706V, and 706W are arranged in this order in the Y-axis direction. The current measurement unit 706U is formed with a through hole 706a penetrating in the X-axis direction. A through hole 706b that penetrates in the X-axis direction is formed in the current measuring unit 706V. A through hole 706c that penetrates in the X-axis direction is formed in the current measurement unit 706W.

  The current measuring units 706U, 706V, and 706W are non-contact sensors that measure currents flowing through the bus bars 704U, 704V, and 704W inserted through the through holes 706a to 706c, respectively. Signals measured by the current measuring units 706U, 706V, and 706W are electrically connected to the control unit 18 in the housing case 500 through signal lines (not shown).

[4] Manufacturing Method of Drive Device First, the motor housing portion 100 to which the winding switching housing portion 200 is attached is prepared. Next, various elements (the control unit 18, the capacitor unit 600, the inverter unit 10, the terminal unit 700, etc.) are attached in the main body unit 502. Next, as shown in FIG. 15, the bolt holes BH1 and BH2 overlap, the bolt holes BH3 and BH4 overlap, and the bolt holes BH5 and BH6 overlap, so that the opening 500b and the opening 106a overlap. The main body portion 502 is disposed with respect to the motor housing portion 100. At this time, the seal member SE is disposed between the opening 500b and the opening 106a so as to surround the openings 106a and 500b from the outside. The main body 502 may be attached from the upper side of the motor housing portion 100 with the opening 106a facing upward and the opening 500b facing downward. In this case, since the motor housing portion 100 and the main body portion 502 are lined up and down along the vertical direction, the openings 106a and 500b can be easily aligned and the fastening operation between the motor housing portion 100 and the main body portion 502 is easy. Can be done. In particular, when the facing surfaces OS1 and OS2 of the coupling portions 106 and 522 facing each other when the motor housing portion 100 and the main body portion 502 are attached are expanded along the horizontal direction, the motor housing portion 100 and the main body portion 502 ( Since it is difficult for both the connecting portions 106 and 522) to be displaced, the above-described positioning and fastening operations are further facilitated.

  Next, the bolt BT1 is inserted into the bolt holes BH1 and BH2 from the main body 502 side, and the bolt BT1 is fixed to the bolt hole BH2. The bolt BT2 is inserted into the bolt holes BH3 and BH4 from the main body 502 side, and the bolt BT2 is fixed to the bolt hole BH4. The bolt BT3 is inserted into the bolt holes BH5 and BH6 from the main body 502 side, and the bolt BT3 is fixed to the bolt hole BH6. Thereby, the main body 502 (the bottom wall 510) and the motor housing 100 (the housing 102) are integrally coupled. That is, the main body 502 (bottom wall 510) and the motor housing 100 (housing housing 102) are fastened by the bolts BT1 to BT3 with the openings 106a and 500b communicating with each other. Next, the lid portion 504 is attached to the main body portion 502 (opening portion 500a). As described above, the inverter accommodating portion 300 is configured, and the driving device 3 is completed.

[5] Operation of Winding Switching Unit When the motor 14 is driven at a low speed, as shown in FIG. 16A, the maximum torque T1 is relatively large but the maximum rotational speed S1 is relatively small. On the other hand, when the motor 14 is driven at high speed, as shown in FIG. 16B, the maximum torque T2 is relatively small, but the maximum rotational speed S2 is relatively large. A plurality of driving states can be realized by one motor 14 by switching the low-speed driving state and the high-speed driving state of the motor 14 by the winding switching unit 16. Therefore, as shown in FIG. 16 (c), a large torque T1 can be generated by the motor 14 in the constant torque region of the motor 14, and up to a larger rotation speed S2 in the constant output region of the motor 14. The motor 14 can be rotated.

[6] Operation In the present embodiment as described above, the cooling water cooled in the radiator of the electric vehicle EV is the cooling pipe CP3, the through hole H10, the flow path 10h (the plate-like part 10e and the concave part DP), and the cooling pipe CP4. , Through hole H12, cooling pipe CP4, cooling pipe CP5, cooling pipe CP2, flow path 204h, flow path 16g (plate-like portion 16e and recess 204f), flow path 204g, flow path 104g, through hole H3, flow path 104e, It flows in the order of the through hole H2 and the cooling pipe CP1, and is returned to the radiator again. Accordingly, in the present embodiment, the inverter unit 10, the winding switching unit 16, and the motor 14 are cooled in this order. The order in which the cooling water flows may be reverse to the above. At this time, the motor 14, the coil switching unit 16, and the inverter unit 10 are cooled in this order. The order in which the inverter unit 10, the winding switching unit 16 and the motor 14 are cooled is not particularly limited, and may be any order.

  In the present embodiment, the flow path 104 e is located between the motor 14 and the inverter unit 10. Therefore, the heat generated in the motor 14 and the inverter unit 10 is absorbed by the coolant flowing through the flow path 104e and hardly interacts with each other. Accordingly, it is possible to reduce the influence of the heat on the inverter unit 10 and the motor 14.

  In the present embodiment, the housing housing 102 of the motor housing portion 100 and the housing housing 500 of the inverter housing portion 300 are integrally coupled via the connecting portion 106 and the connecting portion 522, and the motor housing portion 100. And the inverter housing portion 300 are arranged in the Z-axis direction. Therefore, even if the battery 2 is further arranged on the inverter accommodating part 300 by mounting the drive device 3 on the electric vehicle EV so that the motor 14 which is a heavy object is positioned below, the motor accommodating part 100 The inverter accommodating part 300 and the battery 2 can be supported. At this time, since the battery 2 is adjacent to the inverter accommodating part 300, the battery 2 and the inverter part 10 can be easily electrically connected. When the drive device 3 is mounted on the electric vehicle EV, the drive device 3 is generally positioned with respect to the electric vehicle EV so that the motor shaft 14d extends along the width direction of the electric vehicle EV. At this time, if the motor housing portion 100 and the inverter housing portion 300 are arranged along the Z-axis direction, the dimensions of the drive device 3 in the width direction of the electric vehicle EV can be reduced. Therefore, the layout of the drive device 3 for the electric vehicle EV is facilitated.

  When the motor housing unit 100 and the inverter housing unit 300 are not integrally coupled, and a signal line and a conductive member are installed between them, the motor 14 and the inverter unit 10 are electrically connected. A space for extending the signal line and the conductive member between the motor housing portion 100 and the inverter housing portion 300 is required. However, in this embodiment, the housing housing 102 of the motor housing portion 100 and the housing housing 500 of the inverter housing portion 300 are integrally coupled via the connecting portion 106 and the connecting portion 522, and the signal line SG1 and SG2 and bus bars 404U, 404V, and 404W extend between the housing 102 and the housing 602 through the opening 106a of the connecting portion 106 and the opening 500b of the connecting portion 522. Therefore, a space for extending the signal line and the conductive member between the motor housing portion 100 and the inverter housing portion 300 is not necessary. Therefore, when the drive device 3 is mounted in the electric vehicle EV, the installation space for the drive device 3 with respect to the electric vehicle EV can be reduced.

  In the present embodiment, the motor housing portion 100 and the inverter housing portion 300 are integrally coupled via connecting portions 106 and 522 having openings 106a and 500b. Therefore, the length of the wiring (signal line or conductive member) between the motor 14 and the inverter unit 10 can be shortened. The opening areas of these openings 106a and 500b may be at least large enough to allow wiring to pass therethrough. Therefore, the opening area of the openings 106a and 500b is made as small as possible while ensuring a predetermined size for inserting the wiring, so that the opening areas of the openings 106a and 500b can be accommodated in the motor housing 100 and the inverter. This is smaller than the area facing the portion 300. Therefore, since the sealing area for sealing the connecting portions 106 and 522 is reduced, it is possible to suppress a decrease in sealing performance due to an increase in the opening area of the opening portions 106a and 500b. In addition, the size of the driving device 3 can be reduced by reducing the opening area of the openings 106a and 500b.

  When a load is connected to the end E1 side of the motor shaft 14d, generally, the wiring of the motor 14 is taken out from the end E2 side of the motor shaft 14d. Therefore, in the present embodiment, the housing housing 102 of the motor housing portion 100 and the housing housing 500 of the inverter housing portion 300 are connected via the connecting portion 106 and the connecting portion 522 on the end E2 side of the motor shaft 14d. They are joined together. In this case, since the wiring taken out from the motor 14 is located in the vicinity of the connecting portions 106 and 522, the wiring of the motor can be shortened and simplified.

  In the present embodiment, the portion 524 and the housing 102 are separated by the presence of the support column 104f. Therefore, a space V is generated between the motor housing unit 100 and the inverter housing unit 300 in the Z-axis direction. Therefore, an air layer is interposed between the motor housing unit 100 and the inverter housing unit 300, and heat is hardly transmitted between the motor 14 and the inverter unit 10. As a result, the influence of heat on the motor 14 and the inverter unit 10 can be further reduced.

  In the present embodiment, a flow path 16 g is disposed between the motor housing unit 100 and the winding switching unit 16. Therefore, the heat generated in the motor 14 and the winding switching unit 16 is unlikely to interact with each other. Therefore, it is possible to reduce the influence of the heat on the motor 14 and the winding switching unit 16.

  In the present embodiment, the capacitor unit 600, the inverter unit 10, and the terminal unit 700 are arranged in this order from the end E1 side to the end E2 side of the motor shaft 14d in the X-axis direction. More specifically, in the X-axis direction, from the end E1 side to the end E2 side of the motor shaft 14d, the bus bars 608, 610, bus bars 604p, 606n, the capacitor 12, the inverter unit 10, and the bus bar 704U, 704V, and 704W are arranged in this order and are electrically connected in this order. Therefore, the conductive path between each element in the inverter accommodating part 300 can be shortened.

  When a load is connected to the end E1 side of the motor shaft 14d, generally, the wiring of the motor 14 is taken out from the end E2 side of the motor shaft 14d. Therefore, in the present embodiment, the inverter unit 10 and the motor 14 are electrically connected on the end E2 side of the motor shaft 14d. In this case, since the wiring taken out from the motor 14 is located closer to the inverter unit 10, the wiring of the motor 14 extending from the motor 14 toward the inverter unit 10, that is, the conductive path between the motor 14 and the inverter unit 10 is short. Become. As described above, since the conductive path of the driving device 3 is shortened as a whole, the electrical resistance is reduced. As a result, loss of electrical energy can be reduced, and electricity can be supplied to the motor 14 more efficiently.

  In the present embodiment, the U-phase portion 10U, the V-phase portion 10V, and the W-phase portion 10W of the inverter unit 10 are arranged along the Y-axis direction. That is, the Y-axis direction in which the U-phase portion 10U, the V-phase portion 10V, and the W-phase portion 10W are arranged is orthogonal to the X-axis direction in which the capacitor unit 600, the inverter unit 10, and the terminal unit 700 are arranged. Therefore, all of the conductive path passing through the U-phase part 10U, the conductive path passing through the V-phase part 10V, and the conductive path passing through the W-phase part 10W extend along the X-axis direction. Accordingly, all of these three conductive paths are shortened, and the electrical resistance is decreased. As a result, even when power is supplied to each of the U phase, V phase, and W phase of the motor 14, loss of electrical energy can be reduced, so that electricity can be supplied to the motor 14 more efficiently. It becomes possible. In this embodiment, when viewed from the Z-axis direction, the bus bars 608 and 610, the bus bars 604 and 608 of the capacitor unit 600, the U-phase portion 10U, the V-phase portion 10V, and the W-phase portion 10W of the inverter unit 10 are used. In addition, the bus bars 704U, 704V, and 704W of the terminal unit 700 are substantially line symmetric with respect to a virtual straight line extending along the X-axis direction.

  In the present embodiment, current measuring units 706U, 706V, and 706W that measure currents flowing through the bus bars 704U, 704V, and 704W are disposed in the vicinity of one end of the bus bars 704U, 704V, and 704W. These current measurement units 706U, 706V, and 706W are arranged on the end E2 side of the motor shaft 14d with respect to the inverter unit 10 in the X-axis direction. Therefore, in order to arrange the current measuring units 706U, 706V, and 706W on the bus bars 704U, 704V, and 704W, there is no need to bypass the bus bars 704U, 704V, and 704W. Therefore, it is possible to further shorten the conductive path.

  In the present embodiment, the ends of the bus bars 608 and 610 are exposed to the outside of the housing case 500 through the opening 500b when the driving device 3 is completed. Therefore, the battery 2 can be easily connected to the tips of the bus bars 608 and 610.

  In the present embodiment, the inverter unit 10 is located between the motor 14 and the control unit 18. That is, the control unit 18 is located on the side opposite to the motor 14 with respect to the inverter unit 10. Therefore, the control unit 18 is located outside the drive unit 3 with respect to the inverter unit 10. Therefore, since the signal line SG3 that connects the control unit 18 and the VCU 1 is easily led out of the driving device 3, the control unit 18 and the VCU 1 can be easily connected using the signal line SG3.

  In the present embodiment, in the X-axis direction, the control unit 18 is located closer to the inverter unit 10 than the bus bars 608 and 610, and the signal input / output unit 18 a provided in the control unit 18 includes the control unit 18. Of these, it is located in a region on the side away from the bus bars 608 and 610 in the X-axis direction. In other words, the signal input / output unit 18 a is located in a region away from the bus bars 608 and 610 to which power is supplied in the control unit 18. For this reason, it is difficult for noise to be mixed into the electrical signal input to and output from the control unit 18 via the signal input / output unit 18a.

  In the present embodiment, the components (capacitor unit 600, inverter unit 10 and terminal unit 700) in the inverter housing unit 300 are arranged along the X-axis direction, and the flow path 10h extends along the Y-axis direction. . Therefore, the arrangement direction of the components in the inverter accommodating portion 300 and the extending direction of the flow path 10h are orthogonal to each other. Therefore, the flow path 10h and the inverter part 10 can be brought close to each other in order to cool the inverter part 10 by the flow path 10h while suppressing interference between the components in the inverter accommodating part 300 and the flow path 10h. As a result, the length of the flow path 10h can be shortened, and the components in the inverter accommodating portion 300 can be arranged close to each other. As described above, the drive device 3 can be further reduced in size.

  In the present embodiment, the terminal unit 400 is located between the connector 108 and the connector 110 in the connecting portion 106. Therefore, the signal lines SG 1 and SG 2 connected to the connectors 108 and 110 are wired so as to be separated from the terminal unit 400. Therefore, even when a large current flows through the bus bars 404U, 404V, and 404W of the terminal unit 400 at a high voltage, noise is unlikely to occur in the electrical signals that flow through the signal lines SG1 and SG2. Therefore, the possibility that the drive device 3 malfunctions can be suppressed.

  In the present embodiment, the communication space between the connecting portion 522 (opening portion 500b) and the connecting portion 106 (opening portion 106a) (the internal space of the housing cases 102 and 500) is sealed by the seal member SE. With the bolts BT1 and the bolt holes BH1 and BH2 located inside the sealing area SR surrounded by the seal member SE and in the communication space (inner space of the housings 102 and 500), the housings 102 and 500 are separated. Is concluded. For this reason, the housing cases 102 and 500 are fastened in a state where the communication space (the internal space of the housing cases 102 and 500) is sealed by the seal member SE. In this way, in the peripheral portion where the internal space of the housing case 500 (inverter housing portion 300) and the seal region SR overlap, the fastening portions are arranged at a predetermined interval without increasing the spacing between the fastening portions. Can do. Therefore, it is possible to sufficiently ensure the sealing performance of the communication space.

  In the present embodiment, the motor housing portion 100 (housing housing 102) and the main body portion 502 (bottom wall 510) are integrally coupled via the coupling portions 106 and 522 on the end E2 side of the motor shaft 14d. ing. Therefore, the opening portions 106a and 500b through which the bus bars 404U, 404V, and 404W are inserted and communicated with the internal spaces of the housing cases 102 and 500 are positioned on the end E2 side of the motor shaft 14d. Accordingly, since the sizes of the openings 106a and 500b are limited, the internal spaces of the housing cases 102 and 500 are communicated in a narrower region. As a result, since the seal region SR surrounded by the seal member SE located between the connecting portion 106 and the connecting portion 522 becomes narrower, it becomes possible to improve the sealing performance. In particular, in the present embodiment, the openings 106a and 500b are located closer to the end E2 side of the motor shaft 14d than the flow path 10h. Therefore, the openings 106a and 500b can be made extremely small.

  For example, if the openings 106a and 500b are large and extend to the end E1 side of the motor shaft 14d, the windings 14a and 14b of the motor 14 are exposed to the outside of the housing 102 through the opening 106a. There is a fear. In this case, it becomes easy for liquid and foreign matter to enter the housing 102. However, in this embodiment, although the inside of the connecting portion 106 is exposed to the outside through the opening 106a, the inside of the main body portion 104 is not exposed to the outside. Therefore, it is difficult for liquid and foreign matter to enter the main body 104.

  In the present embodiment, the inverter unit 10 and the control unit 18 do not overlap with the openings 106a and 500b when viewed from the Z-axis direction. Therefore, the openings 106 a and 500 b are not blocked by the inverter unit 10 and the control unit 18. Therefore, it is possible to easily connect the inverter unit 10 and the motor 14 through the openings 106a and 500b and to perform maintenance on these connection points.

  In the present embodiment, the bolt holes BH3 and BH4 are arranged along the periphery of the seal region SR outside the seal region SR. Therefore, the connecting portion 106 (inverter housing portion 300) and the connecting portion 522 (motor housing portion 100) are more reliably fastened in the vicinity of the seal region SR. Therefore, the sealing performance of the driving device 3 can be further improved. In addition, in the present embodiment, the bolt BT1 and the bolt holes BH1, BH2 are located inside the seal region SR and in the internal space of the housing 102, 500, and the bolt BT2 and the bolt holes BH3, BH4 are It is located outside the seal region SR and outside the internal space of the housings 102 and 500. Therefore, the inside and outside of the internal space are not communicated via the bolt holes BH1 to BH4. As a result, it is possible to achieve both secure fastening between the connecting portion 106 (inverter housing portion 300) and the connecting portion 522 (motor housing portion 100) and maintaining the sealing performance of the driving device 3.

  In the present embodiment, the terminal unit 400 is located between the connector 108 and the connector 110 in the connecting portion 106. In this case, the terminal unit 400 (bus bars 404U, 404V, 404W) and the connectors 108, 110 need not be bypassed to avoid each other. Therefore, it is possible to further shorten the conductive path between the motor 14 and the inverter unit 10.

  In the present embodiment, the waterproof ventilation filter F is attached to the through hole H9 of the housing case 500. Therefore, the gas passes through the inside and outside of the driving device 3 (accommodating housings 102, 202, 500) through the waterproof ventilation filter F. Therefore, even if the motor 14, the inverter unit 10 or the winding switching unit 16 generates heat due to the operation of the driving device 3 and the gas in the driving device 3 is thermally expanded, the atmospheric pressure is kept substantially constant inside and outside the driving device 3. It is. If the atmospheric pressure in the driving device 3 increases too much due to thermal expansion, the sealing performance of the driving device 3 may be deteriorated. However, according to the present embodiment, the water tightness of the driving device 3 is ensured by the presence of the waterproof ventilation filter F. It becomes possible to maintain sealing performance.

[7] Other Embodiments Although the embodiment of the present invention has been described in detail above, various modifications may be made to the above embodiment within the scope of the gist of the present invention. For example, in the present embodiment, the electric vehicle EV has been described as an example of a vehicle. However, the driving device according to the present invention is applied to various vehicles that move on land, sea, in the sea, or in the air by propulsion using the rotational force of a motor. 3 may be mounted. Examples of vehicles that move on land include, for example, a motorcycle or automobile having two or more wheels, a tracked vehicle that rolls an endless track with a track ring, and the like. Examples of vehicles that move on the sea or in the sea include various ships, water bikes, submersibles, underwater bikes, and the like. Examples of vehicles that move in the air include, for example, various aircraft.

  Instead of the inverter device (power conversion device) including the inverter unit 10 that converts DC power into AC power, another power conversion device may be used. Other power conversion devices include, for example, a matrix converter device that converts input AC power into AC power of different amplitude and frequency and outputs it, or converts an input DC voltage into a DC voltage of a different magnitude. Examples thereof include a DC-DC converter device for output and a power conversion device driven by electronic components such as a semiconductor switch element.

  The housing 500 may house a motor control device including a motor control unit that controls the motor 14 instead of the inverter device (power conversion device) including the inverter unit (power conversion unit) 10. Examples of the motor control device include the above-described various power conversion devices (for example, an inverter device, a matrix converter device, a DC-DC converter device), and a device including a relay circuit.

  In the present embodiment, the driving device 3 includes the three-phase AC motor 14, but the driving device 3 may include the single-phase AC motor 14. In this case, since the motor 14 is rotationally driven based on the AC power of any two phases among the U phase, the V phase, and the W phase, the driving device 3 is a member relating to an unused phase in the above embodiment. May not be provided.

  In the present embodiment, the motor 14 includes two windings 14a and 14b for high-speed driving and low-speed driving. However, the motor 14 may include only one winding.

  As shown in FIG. 17, the drive device 3 may not include the winding switching housing portion 200 that houses the winding switching portion 16.

  The method of switching the winding by the winding switching unit 16 is not limited to the one in which the windings 14a and 14b are electrically connected in series, and other methods can be adopted. The circuit of the winding switching unit 16 may be configured as a module such as a 6 in 1 type or a 2 in 1 type.

  The channel 16g may be located between the winding switching unit 16 and the lid unit 206. That is, in the X-axis direction, the winding switching unit 16, the flow path 16g, and the lid unit 206 may be arranged in this order.

  The inverter unit 10 may be located between the flow path 10h and the flow path 104e. In this case, the heat generated in the inverter unit 10 is absorbed by the coolant flowing through the flow path 104e and the flow path 10h and is not easily released to the outside of the driving device 3. Therefore, the influence of heat on the outside of the drive device 3 can be reduced.

  A flow path 10 h may be positioned between the inverter unit 10 and the control unit 18. In this case, the heat generated in the inverter unit 10 hardly acts on the control unit 18. Therefore, the influence of heat on the control unit 18 by the inverter unit 10 can be reduced. If the control unit 18 is not able to perform control correctly due to the influence of heat, the function of the drive device 3 will not be exhibited. However, according to the drive device 3 according to the present embodiment, such a risk is reduced. This is particularly effective. In addition, since the influence of heat on the control unit 18 by the inverter unit 10 can be reduced, the separation distance between the inverter unit 10 and the control unit 18 can be shortened. Therefore, it is possible to reduce the size of the drive device 3.

  The direction in which the flow paths 10h and 16g extend is not limited to the Y-axis direction. Specifically, the flow paths 10h and 16g may be linear, or may be bent in a bellows shape, for example.

  The channel 104e may have a form other than an annular shape. Specifically, the flow path 104e may be bent in a bellows shape so as to surround the motor 14, for example.

  Examples of the cooling liquid for cooling the inverter unit 10, the motor 14, and the winding switching unit 16 include water and other liquids.

  In the present embodiment, the bus bar is used to physically and electrically connect the capacitor 12, the inverter unit 10, and the motor 14. However, a conductive member (for example, a conductive wire) other than the bus bar is used. Also good.

  At least one waterproof ventilation filter F may be attached to at least one of the housing cases 102, 202, 500. That is, one or a plurality of waterproof ventilation filters F may be attached to the housing 102, or one or more waterproof ventilation filters F may be attached to the housing 202, One or more waterproof ventilation filters F may be attached to the body 500.

  When the drive device 3 is mounted on the electric vehicle EV so that the Z-axis direction is the vertical direction, the waterproof ventilation filter F is provided at a plurality of different positions in the Z-axis direction among the housings 102, 202, 500. May be attached. In this case, even if one waterproof ventilation filter F is submerged, the waterproof ventilation filter F at another position in the Z-axis direction (height direction) functions. Therefore, it is possible to obtain a drive device that is stronger against changes in the external environment.

  When the drive device 3 is mounted on the electric vehicle EV such that the heavy motor 14 is positioned below, the battery 2 may be disposed other than on the inverter accommodating portion 300.

  The driving device 3 may not have the bus bars 608 and 610. In this case, for example, the ends of the bus bars 604p and 606n and the battery 2 may be directly connected by a conductive cable or the like.

  The opening 500b may be formed in the side wall 512 instead of the bottom wall 510. In this case, the opening 500b may be formed at a position corresponding to the tips of the bus bars 604p and 606n.

  In this specification, “direction” includes not only strictly matching directions but also substantially matching directions (approximate directions).

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  2 ... Battery (DC power supply), 3 ... Drive device, 10 ... Inverter part (motor control part, power conversion part), 10h ... Flow path (second cooling part), 10U ... U phase part (first phase part) 10V: V phase section (second phase section), 10W: W phase section (third phase section), 12: capacitor, 14: motor, 14a: winding (first winding, winding for high speed driving) , 14b ... winding (second winding, low-speed drive winding), 14d ... motor shaft, 16 ... winding switching section, 16g ... flow path (third cooling section), 18 ... control section, 18a ... Signal input / output unit, 100 ... motor housing unit, 102 ... housing case (first housing unit), 104e ... flow path (first cooling unit), 106 ... coupling unit (first coupling unit), 106a ... Opening (first opening), 200... Winding switching housing, 300. Inverter housing, 404U, 404V, 404W, 704U 704V, 704W ... bus bar (conductive member), 500 ... housing (second housing), 500a ... opening (housing port), 500b ... opening (second opening), 502 ... main body, 508 ... lid part, 522 ... connecting part (second connecting part), 604p, 606n ... bus bar (input part), 608, 610 ... bus bar (power supply connecting part), 706U, 706V, 706W ... current measuring part, BT1 ... bolt (First fastening part), BT2 ... bolt (second fastening part), BH1, BH2 ... bolt hole (first fastening part), BH3, BH4 ... bolt hole (second fastening part), EV ... electric Automobile, OS1, OS2 ... opposing surface, SE ... seal member, SG1 ... resolver signal line, SG2 ... winding switching signal line, SR ... seal region.

Claims (22)

A first accommodating portion for accommodating a motor having a motor shaft connected to an external load;
A second accommodating portion that partially communicates with the first accommodating portion and accommodates a motor control portion connected to the motor;
A seal member that seals a communication space between the first housing portion and the second housing portion;
An inner fastening part that is located inside the sealing area surrounded by the sealing member and in the communication space, and fastens the first and second accommodating parts ;
An external fastening portion located outside the communication area and outside the communication space, and fastening the first and second accommodation portions ;
The inner fastening portion and the outer fastening portion that is lined in a straight line along one side of the sealing region, the driving device. The first storage portion and the second storage portion are integrated with each other via a first connection portion included in the first storage portion and a second connection portion included in the second storage portion. It is coupled, the driving device according to claim 1. The first housing portion and the second housing portion are opposite to the load-side end portion connected to an external load on the motor shaft, and the first coupling portion and the second housing portion. The drive device according to claim 2 , wherein the drive device is integrally coupled via a connecting portion. The first connecting portion has a first opening that opens toward the second connecting portion;
The second connecting portion has a second opening that opens toward the first connecting portion,
Said first and second openings, in a state where the first and second housing portions are integrally coupled, correspond with each other to form the communication space, to claim 2 or 3 The drive device described. The drive device according to claim 4 , wherein the seal member surrounds the first and second openings from the outside.   A first accommodating portion for accommodating a motor having a motor shaft connected to an external load;
  A second accommodating portion that partially communicates with the first accommodating portion and accommodates a motor control portion connected to the motor;
  A seal member that seals a communication space between the first housing portion and the second housing portion;
  An internal fastening part that is located inside the communication space surrounded by the sealing member and in the communication space, and fastens the first and second accommodating parts;
  The first storage portion and the second storage portion are integrated with each other via a first connection portion included in the first storage portion and a second connection portion included in the second storage portion. Combined,
  The first connecting portion has a first opening that opens toward the second connecting portion;
  The second connecting portion has a second opening that opens toward the first connecting portion,
  The first and second openings correspond to each other so as to form the communication space in a state where the first and second accommodating portions are integrally coupled.
  The second accommodating portion accommodates a capacitor for stabilizing the voltage of the input DC power inside,
  The capacitor is disposed on a side farther from the first opening than the motor control unit so as not to overlap the motor control unit in a direction in which the first and second housing units are arranged.
  The capacitor and the motor control unit are arranged in this order along a first direction in which the motor shaft extends from a load-side end connected to an external load to the other end side of the motor shaft. And the drive device electrically connected in this order. A conductive member inserted through the first and second openings to electrically connect the motor and the motor control unit;
A pair of signal lines that are inserted through the first and second openings and extend between the first accommodation portion and the second accommodation portion;
The drive device according to claim 6 , wherein the conductive member is inserted into the first and second openings so as to be positioned between the pair of signal lines.   A first accommodating portion for accommodating a motor having a motor shaft connected to an external load;
  A second accommodating portion that partially communicates with the first accommodating portion and accommodates a motor control portion connected to the motor;
  A seal member that seals a communication space between the first housing portion and the second housing portion;
  An inner fastening part that is located inside the sealing area surrounded by the sealing member and in the communication space, and fastens the first and second accommodating parts;
  A conductive member;
  A pair of signal lines,
  The first storage portion and the second storage portion are integrated with each other via a first connection portion included in the first storage portion and a second connection portion included in the second storage portion. Combined,
  The first connecting portion has a first opening that opens toward the second connecting portion;
  The second connecting portion has a second opening that opens toward the first connecting portion,
  The first and second openings correspond to each other so as to form the communication space in a state where the first and second accommodating portions are integrally coupled.
  The conductive member is inserted through the first and second openings to electrically connect the motor and the motor control unit,
  The pair of signal lines are inserted through the first and second openings and extend between the first housing portion and the second housing portion,
  The drive device, wherein the conductive member is inserted through the first and second openings so as to be positioned between the pair of signal lines. The drive device according to any one of claims 6 to 8 , further comprising an external fastening portion that is located outside the sealing region and outside the communication space and fastens the first and second accommodation portions.   The drive device according to claim 9, wherein the inner fastening portion and the outer fastening portion are arranged in a straight line along one side of the seal region.   The first housing portion and the second housing portion are opposite to the load-side end portion connected to an external load on the motor shaft, and the first coupling portion and the second housing portion. The drive device according to any one of claims 6 to 10, wherein the drive device is integrally coupled via a connecting portion.   The drive device according to any one of claims 6 to 11, wherein the seal member surrounds the first and second openings from the outside. The first housing portion and the second housing portion are arranged along a second direction orthogonal to a first direction in which the motor shaft extends,
The drive device according to any one of claims 4 to 12, wherein the first and second openings are opposed to each other in the second direction. The drive device according to claim 13 , wherein the motor control unit is disposed at a position that does not overlap the first opening when viewed from the second direction. At least a part of the first housing portion and the second housing portion is closer to the end of the motor shaft connected to an external load than the first and second coupling portions. The drive device according to claim 13 or 14 , wherein the second housing portion is supported by a support column that is spaced apart and extends from the first housing portion toward the second direction. The said 1st accommodating part and the said 2nd accommodating part are located in a line along the 2nd direction orthogonal to the 1st direction where the said motor shaft is extended, As described in any one of Claims 1-15 . Drive device. The first and second accommodating portions are arranged along the vertical direction,
Each of the first and second accommodating portions has opposing surfaces that face each other and extend along the horizontal direction,
The drive device according to claim 16 , wherein fastening by the internal fastening portion is performed on each of the opposing surfaces. The first accommodating part has a first cooling part for cooling the motor,
The drive device according to any one of claims 1 to 17 , wherein the second housing unit includes a second cooling unit that cools the motor control unit. The drive device according to any one of claims 1 to 18 , wherein a waterproof breathable filter is provided in at least one of the first and second accommodating portions. The drive device according to claim 19 , wherein the waterproof ventilation filter is provided at a plurality of different positions in the first and second accommodating portions. A vehicle comprising the drive device according to any one of claims 1 to 20 . A seal member is provided between a first housing portion that houses a motor having a motor shaft connected to an external load and a second housing portion that houses a motor control portion connected to the motor. Arranging and combining them, and forming a communication space in which the first storage portion and the second storage portion partially communicate with each other;
The first storage portion and the second storage portion are fastened by an internal fastening portion inside a seal area surrounded by the seal member and in the communication space, and the communication space is sealed by the seal member. Process ,
In the seal member and the communicating space inside the seal area surrounded by, it viewed including the step of fastening the said first housing portion and the second housing portion by the external fastening portion,
The method for manufacturing a drive device, wherein the inner fastening portion and the outer fastening portion are arranged in a straight line along one side of the seal region .

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