JP2004328932A - Motor unit and power output device - Google Patents

Abstract

To reduce the size of a terminal block while ensuring insulation between a plurality of connection portions that respectively connect a plurality of terminals of a motor and a plurality of terminals of an inverter that drives the motor with a terminal block attached to a motor unit. .
A groove is formed in a terminal block between three connection portions for connecting a terminal of each phase coil of a motor and a terminal from an inverter, and is attached to the terminal block. The attachment member 60 is formed with an electrically insulating rib 62 that fits into the groove 56 of the terminal block 50. When the attachment member 60 is attached to the terminal block 50, the electrically insulating ribs 62 partition between the adjacent connection portions 55, so that electrical insulation can be ensured. As a result, the size of the terminal block 50 can be reduced as compared with a configuration in which the pitch between the adjacent connection portions 55 is widened to ensure electrical insulation.
[Selection diagram] FIG.

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a motor unit and a power output device, and more particularly, to a motor unit including a motor and a power output device including an internal combustion engine and a motor unit.
[0002]
[Prior art]
Conventionally, this type of motor unit includes 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 (for example, a three-phase motor) for supplying electric power to the motor. There has been proposed a device provided with a terminal plate for electrically connecting motor terminals (terminals corresponding to terminals of U, V, and W phase coils) (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-11-98615 (FIG. 5)
[0004]
[Problems to be solved by the invention]
In such a motor unit, in particular, in a unit 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 are connected to a plurality of terminals from an inverter circuit. It is necessary to ensure sufficient electrical insulation between adjacent connection parts among the connection parts. At this time, it is conceivable that the pitch between adjacent connection portions is set to a length that can secure electrical insulation. In this case, however, the size of the terminal plate must be increased, which causes a problem that the unit is increased in size. there were.
[0005]
The motor unit and the power output device of the present invention solve such a problem, and provide a terminal block while sufficiently securing electrical insulation at a plurality of connection portions that respectively connect a plurality of terminals of the motor and a plurality of terminals of the drive circuit. It aims at miniaturization of.
[0006]
[Means for Solving the Problems and Their Functions and Effects]
The motor unit and the power output device of the present invention employ the following means in order to achieve the above object.
[0007]
The motor unit of the present invention
An electric motor unit including an electric motor,
A terminal block,
A plurality of terminals 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,
The terminal block has a groove formed at a portion between adjacent connection portions,
The gist of the invention is that the attachment member is formed with an insulating rib that is inserted into the groove when the attachment member is attached to the terminal block and that separates the adjacent connection portions.
[0008]
In the electric motor unit according to the present invention, the portion between the adjacent connecting portions is separated by the insulating ribs of the mounting member to secure the insulating distance between the adjacent connecting portions, so that the pitch between the adjacent connecting portions is widened. By doing so, it is possible to reduce the size of the terminal block as compared with the case where the insulation distance is secured.
[0009]
In such a motor unit of the present invention, the mounting member may be an insulating member in which the rib is integrated.
[0010]
In the electric motor unit according to the present invention, the attachment member may be a cover member that covers the plurality of connection portions. In this case, a plurality of connecting portions can be protected. In addition, if the plurality of connecting portions are covered by an insulating mounting member with integrated ribs, electrical insulation between adjacent connecting portions can be more reliably ensured without increasing the size of the terminal block. it can. In the electric motor unit according to the aspect of the present invention, the electric motor unit further includes a liquid supply unit that supplies a lubricating cooling liquid that lubricates and / or cools the inside of the electric motor unit, and the cover member is configured to supply the lubricating cooling liquid supplied by the liquid supplying unit. It may be a member that protects the plurality of connection portions. This can prevent the plurality of connecting portions from being exposed to the lubricating cooling liquid. In the motor unit of the present invention in these aspects, a seal member for sealing an internal space formed in a state where the mounting member is mounted on the terminal block may be provided. In this case, the protection of the plurality of connection portions can be further ensured.
[0011]
Further, in the electric motor unit according to the present invention, the mounting member may include fixing means for fixing the terminal block to a case of the electric motor unit when the mounting member is mounted on the terminal block. In this case, since the mounting member also serves to fix the terminal block, it is possible to reduce the size of the terminal block as compared with a case where a predetermined space is required for fixing the terminal block, such as fixing the terminal block by fastening bolts. In the electric motor unit according to the aspect of the present invention, the fixing means is means for locking the terminal block so that it cannot be pulled out while the terminal block is inserted into an insertion hole formed in a case of the electric motor unit. You can also. This allows the terminal block to be fixed to the case of the motor unit with a simpler structure.
[0012]
The power output device of the present invention,
A power output device including an internal combustion engine and the electric motor unit according to any 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 to and output from any two of the three shafts is determined. Then, a three-axis power input / output mechanism that determines the power input to and output from the remaining one axis, and a second motor connected to the drive shaft,
The gist is that the output shaft of the internal combustion engine, the rotation shaft of the electric motor, the rotation shaft of the second electric motor, and the drive shaft are coaxially arranged.
[0013]
In such a power output device 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.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described using examples. FIG. 1 is a configuration diagram schematically showing the configuration of a power output device 20 according to one embodiment of the present invention. As shown, the power output device 20 of the embodiment is mounted on an engine 22 as an internal combustion engine using gasoline as a 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 into torque and outputs the torque to the drive shaft 98.
[0015]
The motor unit 30 is mainly attached to a planetary gear mechanism 40 in which a carrier 44 is connected to a rotary shaft 31 coaxially connected to an engine output shaft 28, and a rotary shaft 33 connected to a sun gear 42 of the planetary gear mechanism 40. And a motor MG2 having a rotor 36a connected to the ring gear 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. Further, the motor unit 30 includes the U, V. motors of the motors MG1 and MG2. A terminal block 50 that is inserted and attached to an insertion hole 72 formed in a case 70 to connect the terminal of each phase coil of W to the terminal of the inverter 23 that drives each of the motors MG1 and MG2; And a mounting member 60 that is mounted on the terminal block 50 while being inserted into the insertion hole 72.
[0016]
In a case 70 of the motor unit 30, a lubricating cooling liquid (for example, the above-described planetary gear mechanism 40, the motor MG <b> 1, the motor MG <b> 2, and the gear unit 48) for lubricating and cooling the components of the motor unit 30. For example, hydraulic fluid such as automatic transmission fluid (ATF) is filled. When the lubricating cooling liquid is sucked by the oil pump 80, the lubricating cooling liquid is supplied to each unit constituting the motor unit 30 via the oil cooler 86.
[0017]
The oil pump 80 has a pulley 82 connected to a rotating shaft thereof and a pulley 25 connected to the other end of the crankshaft 24 of the engine 22 via a belt 84, and is driven by the rotation of the engine 22. It has become.
[0018]
The rotating shafts 30 and 31 of the motor unit 30 have a hollow structure, and a liquid passage 74 as a passage through which the lubricating cooling liquid flows is formed therein. Further, through-holes 76 are formed in the rotating shafts 31 and 32 of the motor unit 30 at a plurality of locations and connected to the outside of the liquid flow path 74.
[0019]
In a case 90 of the damper 26 of the engine 22, a liquid conduit 92 for receiving a supply of the lubricating cooling liquid from the oil pump 80 is formed. It is in communication with the liquid flow path 74 of the rotating shaft 32. Note that a sealing member 96 is disposed around the through hole 94 so that leakage of the lubricating cooling liquid does not occur.
[0020]
Therefore, the lubricating cooling liquid sucked by the oil pump 80 is supplied to each part of the motor unit 30 via the oil cooler 86, the liquid pipe 92, the through hole 94, the liquid flow path 74, and the through hole 76 in order. Will be. The lubricating cooling liquid supplied by the oil pump 80 and supplied through the through hole 76 flows and flies in the radial direction from the center of the rotating shafts 31 and 32, and the motor MG1, the motor MG2, the planetary gear mechanism 40, The lubrication and cooling of each part of the motor unit 30 such as the gear unit 48 are performed. 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.
[0021]
FIG. 2 is an enlarged view showing a part 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 an exploded perspective view. 4 is a cross-sectional view showing an AA cross section after the mounting member 60 is mounted on the terminal block 50 in FIG. 3. FIG. 5 is a sectional view illustrating the mounting member 60 on 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 member formed of an electrically insulating material such as resin and supporting the conductors 51. 52, three connecting portions 55 in which terminals 53 at the tips of the three conductors 51 and terminals 54 of each phase coil of the motors MG1 and MG2 are connected using bolts and nuts, respectively. A groove 56 (see FIG. 4) is formed in a portion between 55. On the other hand, the attachment member 60 attached to the terminal block 50 is formed of a material having high electrical insulation (for example, an insulating resin such as silicone resin), and is aligned with the groove 56 formed in the terminal block 50 of the attachment member 60. The rib 62 is integrally formed at the portion where the rib 62 is formed. When the attachment member 60 is attached to the terminal block 50, the ribs 62 of the attachment member 60 are fitted into the grooves 56 of the terminal block 50 to partition adjacent connection portions 55, thereby ensuring electrical insulation. As shown in FIG. 2, the terminal block 50 is inserted into an insertion hole 72 formed in the case 70 of the motor unit 30 and attached to the terminal block 50 so as to close a gap between the insertion hole 72 and the terminal block 50. A ring 57 is attached.
[0022]
Further, 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, it is possible to prevent the connecting portion 55 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 inconvenience (for example, electrical short-circuit) caused by exposing the connection portion 55 to the lubricating cooling liquid. Further, as shown in FIG. 2, the mounting member 60 seals a space surrounding the connecting portion 55 with the sealing member 66 when the mounting member 60 is mounted on the terminal block 50. Therefore, the protection of the connection portion 55 can be further ensured.
[0023]
When the terminal block 50 is inserted to the positioning portion 72a of the insertion hole 72 of the case 70 of the motor unit 30, as shown in FIGS. A concave portion 58 is formed on a side surface of a portion slightly protruding inward from the surface. When the attachment member 60 is attached to the terminal block 50, a projection 64 is formed that fits into the recess 58 formed in the terminal block 50 while partially abutting on the inner wall of the case 70. Therefore, when the attachment member 60 is attached to the terminal block 50 inserted into the insertion hole 72 of the case 70, the projection 64 of the attachment member 60 fits into the concave portion 58 of the terminal block 50 and the attachment 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 of the case 70 of the motor unit 30, and the terminal block 50 cannot be pulled out of the case 70. As a result, the terminal block 50 is fixed to the case 70 of the motor unit 30.
[0024]
According to the power output device 20 of the embodiment described above, the terminal block 50 includes the terminals of the respective phase coils of the motors MG1 and MG2 of the motor unit 30 and the terminals from the cable of the inverter 23 that drives the motors MG1 and MG2. A groove 56 is provided at a portion between the adjacent connecting portions 55 of the three connecting portions 55 for connecting the respective terminals, and a mounting member 60 attached to the terminal block 50 is connected to the connecting member 60 which fits into the groove 56 of the terminal block 50 and is adjacent thereto. Since the electrically insulating ribs 62 that partition the portions 55 are provided, sufficient electrical insulation can be ensured without increasing the pitch between adjacent connecting portions 55. As a result, the size of the terminal block 50 can be reduced, and the motor unit 30 and the power output device 20 can be reduced in size. Moreover, since the mounting member 60 is formed in a shape surrounding the terminal block 50, it is possible to effectively prevent the connecting portion 55 from being exposed to the lubricating cooling liquid supplied into the motor unit 30. Further, when the mounting 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 projection 64 of the mounting member 60 is inserted into 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 pulled out, so that a space is required for fixing the terminal block 50, such as fixing the terminal block 50 with bolts or the like. The terminal block 50 can be further reduced in size.
[0025]
In the power output device 20 of the embodiment, the connecting portion 55 is fixed to the terminal block 50 by supporting the conductor 51 with the support 52. However, as in the terminal block 50B of the modification of FIG. 55 may be directly fixed on the terminal block 50B using bolts or the like.
[0026]
In the power output device 20 according to the embodiment, the sealed space is formed in the terminal block 50 by the attachment member 60 and the seal member 66. However, the connection portion 55 is exposed to the lubricating cooling liquid supplied into the motor unit 30. Although the effect of preventing the connection member 55 is reduced, the sealing member 66 may not be used for sealing, or the mounting member 60 may not be formed so as to completely surround the connection portion 55. FIG. 7 shows a perspective view of a modified attachment member 60B. In the example of FIG. 7, the mounting member 60C is formed in a shape in which the upper side in the figure is open.
[0027]
In the power output device 20 according to the embodiment, the motor unit 30 includes the motor MG1, the planetary gear mechanism 40, and the motor MG2 as an example. However, the motor output unit 20 may be applied as long as the motor unit includes at least one motor. is there.
[0028]
In the power output device 20 of the embodiment, the oil pump 80 is driven by the driving force from the engine 22. However, the oil pump 80 is driven by the driving force from the rotating shaft 31 and the rotating shaft 32 (the driving force of the motors MG1 and MG2). 80 may be driven, or may be driven electrically. In the power output device 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.
[0029]
In the power output device 20 of the embodiment, the lubricating cooling liquid from the oil pump 80 is supplied from the rotating shaft 31 and the rotating shaft 32 to each unit constituting the motor unit 30, but is supplied from above the motor unit 30. It may be something.
[0030]
As described above, the embodiments of the present invention have been described using the examples. However, the present invention is not limited to these examples, and may be implemented in various forms without departing from the gist of the present invention. Obviously you can get it.
[Brief description of the drawings]
FIG. 1 is a configuration diagram schematically showing a configuration of a power output device 20 according to an embodiment of the present invention.
FIG. 2 is an enlarged view showing a terminal block 50 and a mounting member 60 in the motor unit 30 of FIG. 1 in an enlarged manner.
FIG. 3 is an exploded perspective view showing a schematic configuration of a terminal block 50 and a mounting member 60.
FIG. 4 is a cross-sectional view showing an 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 sectional view showing a BB section of the terminal block 50 and the mounting member 60 after the mounting member 60 is mounted on the terminal block 50.
FIG. 6 is a configuration diagram schematically illustrating a configuration of a terminal block 50B and a mounting member 60B according to a modified example.
FIG. 7 is a perspective view schematically showing a configuration of a mounting member 60C according to a modification.
[Explanation of symbols]
Reference Signs List 20 power output device, 22 engine, 24 crankshaft, 25 pulley, 26 damper, 28 engine output shaft, 30 motor unit, 31, 32, 33 rotation 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 channel, 76 through hole, 80 oil pump, 82 pulley, 84 belt, 86 oil cooler, 90 case, 92 liquid pipe Road, 94 through hole, 96 sealing member, 98 drive shaft, MG1, MG2 motor .

Claims (9)

An electric motor unit including an electric motor,
A terminal block,
A plurality of terminals for electrically connecting a plurality of terminals of the motor and a plurality of terminals from a drive circuit for driving the motor on the terminal block,
An attachment member attached to the terminal block,
The terminal block has a groove formed at a portion between adjacent connection portions,
The motor unit, wherein the mounting member is inserted into the groove when the mounting member is mounted on the terminal block, and is formed with an insulating rib for partitioning the adjacent connecting portion. The motor unit according to claim 1,
The motor unit, wherein the attachment member is an insulating member in which the rib is integrated. The motor unit according to claim 1 or 2,
The motor unit, wherein the attachment member is a cover member that covers the plurality of connection portions. The motor unit according to claim 3, wherein
Liquid supply means for supplying a lubricating cooling liquid for lubricating and / or cooling the electric motor unit,
The motor unit, wherein the cover member is a member that protects the plurality of connection portions from the lubricating cooling liquid supplied by the liquid supply unit. The motor unit according to claim 3 or 4,
An electric motor unit including a seal member for sealing an internal space formed when the attachment member is attached to the terminal block. The motor unit according to any one of claims 1 to 5, wherein
The motor unit, further comprising a fixing unit that fixes the terminal block to a case of the motor unit when the mounting member is mounted on the terminal block. The motor unit according to claim 6, wherein
The motor unit, wherein the fixing unit is a unit that locks the terminal block so that it cannot be pulled out while the terminal block is inserted into an insertion hole formed in a case of the motor unit. A power output device comprising an internal combustion engine and the electric motor unit according to any one of claims 1 to 7,
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 to and output from any two of the three shafts is determined. A three-axis power input / output mechanism that determines the power input to and output from the remaining one axis, and a second electric motor connected to the drive shaft,
A power output device wherein an output shaft of the internal combustion engine, a rotation shaft of the electric motor, a rotation shaft of a second electric motor, and the drive shaft are coaxially arranged. The power output device according to claim 8, wherein
A power output device wherein the motor unit is arranged in the order of the internal combustion engine, the motor, the power input / output mechanism, and the second motor.

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