JP4539697B2 - Electric motor unit and power output device - Google Patents

Description

  The present invention relates to an electric motor unit and a power output device, and more particularly to an electric motor unit including an electric motor and a power output device including an internal combustion engine and an electric motor unit.

  Conventionally, as this type of electric motor unit, a plurality of terminals of a motor (for example, terminals of U, V, and W phase coils of a three-phase motor) and a plurality of terminals of an inverter circuit that supplies power to the motor (for example, a three-phase motor) A device including a terminal plate for electrically connecting a motor U, V, and a terminal corresponding to a W-phase coil terminal has been proposed (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 11-98615 (FIG. 5)

  In such an electric motor unit, in particular, in a device that supplies high-voltage power to a motor, such as a power output unit that outputs power to a drive shaft, a plurality of terminals of the motor and a plurality of terminals from the inverter circuit are connected. It is necessary to ensure sufficient electrical insulation between adjacent connection portions. At this time, it is conceivable that the pitch between adjacent connecting portions is set to a length that can ensure electrical insulation, but in this case, since the size of the terminal plate has to be increased, there is a problem that the unit is enlarged. there were.

  The electric motor unit and the power output device of the present invention solve these problems, and the terminal block while sufficiently ensuring electrical insulation at a plurality of connecting portions that respectively connect a plurality of terminals of the motor and a plurality of terminals of the drive circuit. The purpose is to reduce the size.

  The electric motor unit and the power output apparatus of the present invention employ the following means in order to achieve the above-described object.

The electric motor unit of the present invention is
An electric motor unit including an electric motor,
A terminal block;
A plurality of connection portions for electrically connecting a plurality of terminals of the motor and a plurality of terminals from a drive circuit for driving the motor;
An attachment member attached to the terminal block,
In the terminal block, a groove is formed at a site between adjacent connecting portions,
The attachment member is formed by forming an insulating rib that is inserted into the groove when the attachment member is attached to the terminal block and partitions the adjacent connection portions.

  In the electric motor unit of the present invention, the portion between the adjacent connection portions is partitioned by the insulating ribs of the mounting member to ensure the insulation distance between the adjacent connection portions, so that the pitch between the adjacent connection portions is widened. By doing so, a terminal block can be reduced in size compared with what secures an insulation distance.

  In such an electric motor unit of the present invention, the attachment member may be an insulating member in which the rib is integrated.

  In the electric motor unit of the present invention, the attachment member may be a cover member that covers the plurality of connection portions. In this way, a plurality of connection parts can be protected. Further, if the plurality of connecting portions are covered with an insulating mounting member in which the ribs are integrated, it is possible to more reliably ensure the electrical insulation between the adjacent connecting portions without increasing the size of the terminal block. it can. The electric motor unit of the present invention of this aspect further includes liquid supply means for supplying a lubricating cooling liquid for lubricating and / or cooling the inside of the electric motor unit, and the cover member is made of the lubricating cooling liquid supplied by the liquid supplying means. It can also be a member that protects the plurality of connecting portions. In this way, it is possible to prevent the plurality of connecting portions from being exposed to the lubricating cooling liquid. In the electric motor unit of the present invention of these aspects, a seal member that seals an internal space formed in a state where the attachment member is attached to the terminal block may be provided. By doing so, it is possible to more reliably protect the plurality of connecting portions.

  Furthermore, in the electric motor unit of the present invention, the attachment member may include fixing means for fixing the terminal block to the case of the electric motor unit when the mounting member is attached to the terminal block. In this case, since the mounting member also serves to fix the terminal block, the terminal block can be reduced in size as compared with a case where a predetermined space is required for fixing the terminal block, such as fixing the terminal block by fastening a bolt. In this aspect of the electric motor unit of the present invention, the fixing means is means for locking the terminal block so that it cannot be pulled out in a state where the terminal block is inserted into an insertion hole formed in the case of the electric motor unit. You can also If it carries out like this, a terminal block can be fixed to the case of an electric motor unit with a simpler structure.

The power output apparatus of the present invention is
A power output device comprising an internal combustion engine and the electric motor unit of any one of the above aspects,
The electric motor unit has three shafts connected to the output shaft of the internal combustion engine, the rotating shaft of the electric motor, and the drive shaft, and the power input / output to / from any two of the three shafts is determined. Then, a three-axis power input / output mechanism for determining the power input / output to / from the remaining one shaft, and a second electric motor connected to the drive shaft,
The gist is that the output shaft of the internal combustion engine, the rotary shaft of the electric motor, the rotary shaft of the second electric motor, and the drive shaft are arranged on the same axis.

  In the power output apparatus of the present invention, the electric motor unit may be arranged in the order of the internal combustion engine, the electric motor, the power input / output mechanism, and the second electric motor.

  Next, embodiments of the present invention will be described using examples. FIG. 1 is a configuration diagram showing an outline of the configuration of a power output apparatus 20 according to an embodiment of the present invention. As shown in the figure, the power output apparatus 20 of the embodiment is mounted on an engine 22 as an internal combustion engine using gasoline as fuel, and an engine output shaft 28 connected to a crankshaft 24 of the engine 22 via a damper 26. And a motor unit 30 that converts the power input from the output shaft 28 to torque and outputs it to the drive shaft 98.

  The motor unit 30 is mainly attached to a planetary gear mechanism 40 in which a carrier 44 is connected to a rotation shaft 31 that is coaxially connected to the engine output shaft 28, and a rotation shaft 33 that is connected to a sun gear 42 of the planetary gear mechanism 40. A motor MG1 having a rotor 34a, and a motor MG2 having a rotor 36a attached to the rotary shaft 32 connected to the ring shaft 46 of the planetary gear mechanism 40 and connected to the drive shaft 98 via the gear unit 48. These are housed in a case 70 of the motor unit 30. In addition, the motor unit 30 includes the motors MG1 and MG2 U, V. A terminal block 50 that is inserted into and attached to an insertion hole 72 formed in the case 70 in order to connect the terminal of each phase coil of W and the terminal of the inverter 23 that drives each of the motors MG1 and MG2, and the terminal block 50 Is attached to the terminal block 50 in a state of being inserted into the insertion hole 72.

  In the case 70 of the motor unit 30, a lubricating cooling liquid (for example, the planetary gear mechanism 40, the motor MG1, the motor MG2, the gear unit 48, etc.) constituting the motor unit 30 is lubricated and cooled. For example, it is filled with hydraulic fluid such as automatic transmission fluid (ATF). When the lubricating cooling liquid is sucked by the oil pump 80, the lubricating cooling liquid is supplied to each part constituting the motor unit 30 via the oil cooler 86.

  In the oil pump 80, a pulley 82 connected to a rotation shaft of the oil pump 80 is connected to a pulley 25 connected to the other end of the crankshaft 24 of the engine 22 via a belt 84, and is driven as the engine 22 rotates. It is like that.

  The rotation shafts 30 and 31 of the motor unit 30 have a hollow structure, and a liquid flow path 74 is formed as a flow path through which the lubricating cooling liquid flows. In addition, the rotation shafts 31 and 32 of the motor unit 30 are formed with through holes 76 connected to the outside of the liquid flow path 74 at a plurality of locations.

  The case 90 of the damper 26 of the engine 22 is formed with a liquid conduit 92 that receives the supply of the lubricating cooling liquid from the oil pump 80. The liquid conduit 92 is connected to the rotary shaft 31 and the like via the through hole 94. It communicates with the liquid flow path 74 of the rotating shaft 32. A sealing member 96 is disposed around the through hole 94 so that the lubricating cooling liquid does not leak.

  Accordingly, the lubricating cooling liquid sucked by the oil pump 80 is supplied to each part of the motor unit 30 through the oil cooler 86, the liquid pipe 92, the through hole 94, the liquid flow path 74, and the through hole 76 in this order. Will be. The lubricating cooling liquid pumped by the oil pump 80 and supplied through the through-hole 76 flows or flies in the radial direction from the axial center of the rotary shafts 31 and 32, and the motor MG1, the motor MG2, the planetary gear mechanism 40, Each part of the motor unit 30 such as the gear unit 48 is lubricated and cooled. Then, it is transmitted to the wall surface of the case 70 of the motor unit 30 and stored again at the bottom of the case 70 of the motor unit 30.

  2 is an enlarged view showing a portion of the terminal block 50 and the mounting member 60 in the motor unit 30 of FIG. 1, and FIG. 3 shows a schematic configuration of the terminal block 50 and the mounting member 60 of the motor unit 30. It is a disassembled perspective view. 4 is a cross-sectional view showing an AA cross-section after the mounting member 60 is attached to the terminal block 50 in FIG. 3, and FIG. 5 is a cross-sectional view of the terminal block 50 in FIG. It is sectional drawing which shows the BB cross section after being attached. As shown in FIGS. 1 to 5, the terminal block 50 includes three conductors 51 electrically connected to the cable of the inverter 23 and a support body that is formed of an electrically insulating material such as resin and supports the conductors 51. 52 and three connection portions 55 to which terminals 53 of the tips of the three conductors 51 and terminals 54 of the respective phase coils of the motors MG1 and MG2 are connected using bolts and nuts, etc., and adjacent connection portions A groove 56 (see FIG. 4) is formed in a portion between 55. On the other hand, the mounting member 60 attached to the terminal block 50 is made of a material having high electrical insulation (for example, insulating resin such as silicone resin), and is aligned with the groove 56 formed in the terminal block 50 of the mounting member 60. The rib 62 is integrally formed in the part to be performed. When the attachment member 60 is attached to the terminal block 50, the rib 62 of the attachment member 60 fits into the groove 56 of the terminal block 50 to partition the adjacent connection portions 55, thereby ensuring electrical insulation. As shown in FIG. 2, when the terminal block 50 is attached by being inserted into the insertion hole 72 formed in the case 70 of the motor unit 30, the gap between the insertion hole 72 and the terminal block 50 is closed. A ring 57 is attached.

  As shown in FIG. 2, the attachment member 60 is formed so as to surround the entire connection portion 55 when attached to the terminal block 50. Therefore, the connection portion 55 can be prevented from being exposed to the lubricating cooling liquid supplied into the motor unit 30 by driving the oil pump 80 described above. As a result, it is possible to avoid inconveniences (for example, electrical short-circuiting) that may occur when the connecting portion 55 is exposed to the lubricating cooling liquid. Furthermore, as shown in FIG. 2, the attachment member 60 seals a space surrounding the connection portion 55 with a seal member 66 when attached to the terminal block 50. Therefore, the connection part 55 can be protected more reliably.

  Further, as shown in FIGS. 2 to 4, the terminal block 50 is formed on the inner wall of the case 70 of the motor unit 30 when the terminal block 50 is inserted up to the positioning portion 72 a of the insertion hole 72 of the case 70 of the motor unit 30. A concave portion 58 is formed on the side surface of the portion that slightly protrudes inward from the surface. The attachment member 60 is formed with a convex portion 64 that fits into a concave portion 58 formed in the terminal block 50 while partly contacting the inner wall of the case 70 when being attached to the terminal block 50. Therefore, when the mounting member 60 is attached to the terminal block 50 inserted into the insertion hole 72 of the case 70, the convex portion 64 of the mounting member 60 is fitted into the concave portion 58 of the terminal block 50 and the mounting member 60 in FIG. Since the uppermost surface contacts the inner wall of the case 70 of the motor unit 30, the attachment member 60 is caught when the terminal block 50 is pulled out from the case 70 of the motor unit 30, and the terminal block 50 cannot be pulled out from the case 70. As a result, the terminal block 50 is fixed to the case 70 of the motor unit 30.

  According to the power output apparatus 20 of the embodiment described above, the terminal block 50 includes terminals of the respective phase coils of the motors MG1 and MG2 of the motor unit 30 and terminals from the cable of the inverter 23 that drives the motors MG1 and MG2. A groove 56 is provided in a portion between the adjacent connection portions 55 in the three connection portions 55 that connect each of the two connection portions 55, and the attachment member 60 that is attached to the terminal block 50 is fitted in the groove 56 of the terminal block 50 and is adjacent to the connection member 55. Since the electrically insulating rib 62 that partitions the portion 55 is provided, sufficient electrical insulation can be secured without increasing the pitch between the adjacent connecting portions 55. As a result, the terminal block 50 can be reduced in size, and as a result, the motor unit 30 and the power output device 20 can be reduced in size. In addition, since the attachment member 60 is formed in a shape surrounding the terminal block 50, it is possible to effectively prevent the connection portion 55 from being exposed to the lubricating cooling liquid supplied into the motor unit 30. Further, when the attachment member 60 is attached to the terminal block 50 in a state where the terminal block 50 is inserted into the insertion hole 72 of the case 70 of the motor unit 30, the convex portion 64 of the attachment member 60 is formed in the concave portion 58 of the terminal block 50. Is fixed by forming the terminal block 50 and the mounting member 60 so that the terminal block 50 is not pulled out and the terminal block 50 is not pulled out. In comparison, the terminal block 50 can be further reduced in size.

  In the power output apparatus 20 of the embodiment, the connection portion 55 is fixed to the terminal block 50 by supporting the conductor 51 with the support body 52. However, like the terminal block 50B of the modified example of FIG. 55 may be directly fixed on the terminal block 50B using a bolt or the like.

  In the power output apparatus 20 of the embodiment, the sealed space is formed in the terminal block 50 by the mounting member 60 and the seal member 66, but the connection portion 55 is exposed to the lubricating cooling liquid supplied into the motor unit 30. However, the sealing member 66 may not be sealed, or the mounting member 60 may not have a shape that completely surrounds the connecting portion 55. FIG. 7 shows a perspective view of a modified mounting member 60B. In the example of FIG. 7, the attachment member 60 </ b> C is formed in a shape with the upper side opened in the drawing.

  In the power output apparatus 20 of the embodiment, the motor unit 30 including the motor MG1, the planetary gear mechanism 40, and the motor MG2 has been described as an example, but any motor unit including at least one motor can be applied. is there.

  In the power output apparatus 20 of the embodiment, the oil pump 80 is driven by the driving force from the engine 22, but the oil pump is driven by the driving force from the rotating shaft 31 and the rotating shaft 32 (driving force of the motors MG1 and MG2). 80 may be driven, or may be driven by electric drive. Further, in the power output apparatus 20 of the embodiment, the oil pump 80 and the engine 22 are connected by the belt 84 to obtain the driving force of the oil pump 80. However, the oil pump 80 and the engine 22 are gear-coupled. The driving force of the oil pump 80 may be obtained.

  In the power output apparatus 20 of the embodiment, the lubricating cooling liquid from the oil pump 80 is supplied from the rotary shaft 31 and the rotary shaft 32 to each part of the motor unit 30, but is supplied from the upper part of the motor unit 30. It may be a thing.

  The embodiments of the present invention have been described using the embodiments. However, the present invention is not limited to these embodiments, and can be implemented in various forms without departing from the gist of the present invention. Of course you get.

It is a block diagram which shows the outline of a structure of the power output device 20 which is one Example of this invention. It is an enlarged view which expands and shows the part of the terminal block 50 and the attachment member 60 in the motor unit 30 of FIG. 4 is an exploded perspective view showing a schematic configuration of a terminal block 50 and an attachment member 60. FIG. FIG. 5 is a cross-sectional view showing the AA cross section of the terminal block 50 and the mounting member 60 after the mounting member 60 is mounted on the terminal block 50. FIG. 5 is a cross-sectional view showing a BB cross section of the terminal block 50 and the mounting member 60 after the mounting member 60 is mounted on the terminal block 50. It is a block diagram which shows the outline of a structure of the terminal block 50B and the attachment member 60B of a modification. It is a perspective view which shows the outline of a structure of the attachment member 60C of a modification.

Explanation of symbols

  20 power output device, 22 engine, 24 crankshaft, 25 pulley, 26 damper, 28 engine output shaft, 30 motor unit, 31, 32, 33 rotating shaft, 34a, 36a rotor, 34b, 36b stator, 40 planetary gear mechanism, 42 sun gear, 44 carrier, 46 ring gear, 48 gear unit, 50, 50B terminal block, 51 conductor, 52 support, 53, 54 terminal, 55 connection, 56 groove, 57 O-ring, 58 recess, 60, 60B, 60C Mounting member, 62 rib, 64 convex portion, 70 case, 72 mounting hole, 72a positioning portion, 74 supply flow path, 76 through hole, 80 oil pump, 82 pulley, 84 belt, 86 oil cooler, 90 case, 92 liquid pipe Path, 94 through hole, 96 sealing member, 98 Shaft, MG1, MG2 motor.

Claims (7)

The first motor, three shafts connected to the output shaft of the internal combustion engine, the rotation shaft of the first motor, and the drive shaft, and the power input / output to / from any two of the three shafts A three-axis power input / output mechanism that determines the power input / output to / from the remaining one shaft when determined, and a second electric motor connected to the drive shaft, and an output shaft of the internal combustion engine, The rotation shaft of the first motor, the rotation shaft of the second motor, and the drive shaft are arranged coaxially and from the internal combustion engine to the first motor, the power input / output mechanism, the second motor An electric motor unit arranged in the order of electric motors,
  A portion having a plurality of connecting portions that electrically connect a plurality of terminals of the first motor and a plurality of terminals from a drive circuit that drives the first motor, and between adjacent connecting portions A terminal block with grooves formed in
  Insulating ribs that are inserted into the grooves and partition between the adjacent connection portions when formed on the terminal block are formed, and when the terminal block is attached to the terminal block, the terminal block is used as a case of the electric motor unit. A mounting member comprising fixing means for fixing;
  With
  The case of the motor unit has an insertion hole having a positioning portion into which the terminal block can be inserted up to a predetermined position so that the terminal block is disposed at a portion between the first motor and the second motor. Formed,
  The terminal block is formed with a recess in a direction substantially orthogonal to the insertion direction into the insertion hole inside the case in a state where the terminal block is inserted to the predetermined position.
  When the attachment member is attached to the terminal block, the fixing means is formed with a convex portion that fits into a concave portion formed in the terminal block, and when the terminal block is pulled out from the case of the electric motor unit. The attachment member is formed so as to be caught.
  Electric motor unit. The electric motor unit according to claim 1,
The mounting member is an insulating member in which the rib is integrated. The electric motor unit according to claim 1 or 2,
The mounting member is a cover member that covers the plurality of connecting portions. The electric motor unit according to claim 3,
Liquid supply means for supplying a lubricating cooling liquid for lubricating and / or cooling the interior of the electric motor unit;
The said cover member is a member which protects these connection parts from the lubrication cooling liquid supplied by the said liquid supply means. Electric motor unit. The electric motor unit according to claim 3 or 4,
An electric motor unit comprising a seal member for sealing an internal space formed in a state where the attachment member is attached to the terminal block. The electric motor unit according to any one of claims 1 to 5,
  The fixing means is configured such that a protrusion formed on the attachment member is fitted into a recess formed on the terminal block while the attachment member abuts against an inner wall of the case of the motor unit. Means for locking the terminal block so that it cannot be pulled out in a state where the terminal block is inserted into the insertion hole formed in
  Electric motor unit. A power output apparatus comprising an internal combustion engine and the electric motor unit according to any one of claims 1 to 6.

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