Electrical connection structure

Abstract

The present invention is to provide an electric connection structure capable of realizing a compact rotary electric drive unit. To solve the above problem, an electric connection structure is provided with: a housing 2 that houses a first motor 3 and a second motor 4 inside; and an electric device 5 that controls the first motor 3 or the second motor 4; and the first motor 3 and a first three-phase terminal 15 of the electric device 5 are electrically connected via a connection member 16, and the second motor 4 and a second three-phase terminal 17 of the electric device 5 are electrically connected via the connection member 16. On the electric device 5 side, the first three-phase terminal 15 and the second three-phase terminal 17 are arranged in series. On the housing 2 side, a first motor side three-phase terminal 24 connected to the first motor 3 in the connection member 16 and a second motor side three-phase terminal 25 connected to the second motor 4 in the connection member 16 are arranged in parallel.

Description

TECHNICAL FIELD

[0001] The present application relates to an electrical connection structure between an electric motor and an electrical device that controls the electric motor. BACKGROUND

[0002] In the past, in a hybrid vehicle, in a rotary electric drive unit in which an electrical device is mounted to a case that houses an electric motor, a three-phase connector provided on the electrical device side is connected to a three-phase connector provided on the case side to electrically connect the electrical device and the electric motor. At this time, the three-phase connector provided on the front of the electrical device side is connected to the three-phase connector provided on the front of the case side, and the three-phase connector provided on the rear of the electrical device side is connected to the three-phase connector provided on the rear of the case side. In this way, in the structure in which the three-phase connector provided on the rear of the electrical device side is connected to the three-phase connector provided on the rear of the case side, the case protrudes toward the rear, thereby making the case large in the rear.

[0003] Therefore, as disclosed in the following Patent Document 1, a structure in which, in front of the rotary electric drive unit, one end of a power cable is connected to a connector connected to the side surface of the power controller, and the other end of the power cable is connected to the variable drive axle is considered. Thereby, the connection portions of the motor as the electric motor and the power controller are concentrated in front of the rotary electric drive unit, and thus the above problem can be solved.

[0004] [Prior Art Documents]

[0005] (Patent Document)

[0006] Patent Document 1: Japanese Patent Application Publication No. 2019-34621 SUMMARY

[0007] [Problems to be Solved by the Invention]

[0008] However, in the structure described in Patent Document 1, since the connection portions of the electric motor and the power controller are concentrated in front, the variable drive axle protrudes toward the front, thereby causing the case to become large in the front. At this time, a large input to the variable drive axle can occur at the time of a vehicle collision. In addition, in order to solve the above problem, it is considered to disperse the connection portions of the electric motor and the power controller to the left and right of the rotary electric drive unit, but at this time, the size of the rotary electric drive unit in the left-right direction increases. Thereby, when the rotary electric drive unit is disposed in the engine compartment, it can affect the layout between the rotary electric drive unit and the surrounding components in the engine compartment.

[0009] The present application aims to provide an electrical connection structure that can realize a rotary electric drive unit with a compact structure.

[0010] [Technical Means to Solve the Problem]

[0011] (1) The present application provides a structure, comprising: a housing, internally accommodating a first motor and a second motor; and, an electrical device, controlling the first motor or the second motor; and, electrically connecting the first motor and a first three-phase terminal of the electrical device via a connection member, and electrically connecting the second motor and a second three-phase terminal of the electrical device via the connection member; wherein, on the electrical device side, the first three-phase terminal and the second three-phase terminal are arranged in series; on the housing side, a first motor-side three-phase terminal connected to the first motor in the connection member and a second motor-side three-phase terminal connected to the second motor in the connection member are arranged in parallel.

[0012] (2) In the above (1), preferably, the rotation axis of the first motor and the rotation axis of the second motor are parallel in the housing; a virtual line connecting the rotation axis of the first motor and the rotation axis of the second motor is not parallel to a virtual line passing through the center of the first three-phase terminal and the second three-phase terminal arranged in series.

[0013] (3) In the above (1) or (2), preferably, the connection member has: an electrical device-side connection member, electrically connected to the first three-phase terminal and the second three-phase terminal; a motor-side connection member, having the first motor-side three-phase terminal and the second motor-side three-phase terminal; and, a conversion portion, electrically connecting the first three-phase terminal and the second three-phase terminal arranged in series and the first motor-side three-phase terminal and the second motor-side three-phase terminal arranged in parallel; and, the length in the same direction as the direction of the first three-phase terminal and the second three-phase terminal in the electrical device-side connection member is shorter than the length in the direction of the first three-phase terminal and the second three-phase terminal in the motor-side connection member.

[0014] (4) In the above (3), preferably, the electrical device-side connection member is provided to the electrical device; the conversion portion and the motor-side connection member are provided to the housing; and, a floating mechanism is provided between the electrical device-side connection member and the first three-phase terminal and the second three-phase terminal.

[0015] (EFFECTS OF THE INVENTION)

[0016] According to the present application, an electrical connection structure can be provided, which can realize a compact rotary electric drive unit. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a side view illustrating an example of a rotary electric drive unit to which an electrical connection structure according to an embodiment of the present application is applied.

[0018] Figure 2 is a structural diagram illustrating an electrical connection structure of one embodiment of the present application. DETAILED DESCRIPTION

[0019] Hereinafter, one embodiment of the present application will be described in detail with reference to the drawings.

[0020] Figure 1 is a right side view illustrating an example of a rotary electric drive unit to which the electrical connection structure of one embodiment of the present application is applied. Figure 2 is a structural diagram illustrating an electrical connection structure of one embodiment of the present application. Further, in Figure 2 , an exploded state of the electrical connection structure is illustrated. The rotary electric drive unit 1 of the present embodiment includes: a first motor 3 and a second motor 4 housed in a housing 2; and an electrical device 5 mounted on the housing 2.

[0021] The first motor 3 is a motor for driving a vehicle to travel, and generates a rotational driving force by electric power supplied from a battery. As Figure 2 illustrated, the first motor 3 is disposed at an upper end portion of the rear side of the housing 2 so that a rotational shaft 6 is along the left-right direction.

[0022] The second motor 4 is a motor for generating electric power, and generates electric power by a rotational driving force input to a rotational shaft 7. As Figure 2 illustrated, the second motor 4 is disposed at the front side of the housing 2 so that the rotational shaft 7 is along the left-right direction. The second motor 4 is disposed in the housing 2 so that the rotational shaft 7 is below and in front of the rotational shaft 6 of the first motor 3.

[0023] As described above, the rotational shaft 6 of the first motor 3 and the rotational shaft 7 of the second motor 4 are disposed along the left-right direction. In addition, as described above, the rotational shaft 7 of the second motor 4 is below and in front of the rotational shaft 6 of the first motor 3. Thus, the rotational shaft 6 of the first motor 3 and the rotational shaft 7 of the second motor 4 are parallelly disposed in the housing 2 in a state of being separated in the up-down direction and the left-right direction.

[0024] The electrical device 5 is mounted on the housing 2. The electrical device 5 has a power control unit (PCU) 8.

[0025] As Figure 1 illustrated, the PCU 8 is disposed directly above the housing 2. The PCU 8 has a PCU housing 10, 11 and a PCU cover 12. Specifically, the PCU housing 11 is disposed above the PCU housing 10, and the PCU cover 12 is disposed above the PCU housing 11. A power supply module 14 is disposed in an enclosure 13 formed by the PCU housing 10, 11 and the PCU cover 12. That is, the PCU 8 has the power supply module 14 housed in the aforementioned enclosure 13.

[0026] The electric connection structure of the present embodiment is applied to the rotary electric drive unit 1 of such a structure. The electric connection structure of the present embodiment has: the housing 2 that accommodates the first motor 3 and the second motor 4 inside; and the electric device 5 that controls the first motor 3 or the second motor 4. In this electric connection structure, the first three-phase terminal 15 of the first motor 3 and the electric device 5 are electrically connected via the connection member 16, and the second three-phase terminal 17 of the second motor 4 and the electric device 5 are electrically connected via the connection member 16. As shown in FIG. 1, the connection member 16 has: an electric device side connection member 18, a motor side connection member 19, and a conversion portion 20. Figure 2

[0027] The electric device side connection member 18 is a connector, and has six device side electric connection portions 21 that electrically connect the conversion portion 20 and the electric device side connection member 18. The six device side electric connection portions 21 are arranged in series. Specifically, the six device side electric connection portions 21 are arranged in a row along the front-rear direction. The device side electric connection portions 21 are electrically connected to the first three-phase terminal 15 of the electric device 5 and the second three-phase terminal 17 of the electric device 5.

[0028] The first three-phase terminal 15 and the second three-phase terminal 17 are arranged in the power module 14 of the electric device 5. The first three-phase terminal 15 and the second three-phase terminal 17 are arranged in series on the electric device 5 side. Specifically, the three terminals of the first three-phase terminal 15 and the three terminals of the second three-phase terminal 17 are arranged in a row along the front-rear direction. Each of the three terminals of the first three-phase terminal 15 and the three terminals of the second three-phase terminal 17 is electrically connected to each of the six device side electric connection portions 21 with a connection wire portion 22.

[0029] In the present embodiment, a floating mechanism is provided between the electric device side connection member 18 and the first three-phase terminal 15 and the second three-phase terminal 17. The floating mechanism absorbs a tolerance variation between the electric device side connection member 18 and the motor side connection member 19. Therefore, in the floating mechanism, the electrical connection is made with a wire instead of a simple bus bar.

[0030] The electric device side connection member 18 of such a structure is provided to the electric device 5. Specifically, the electric device side connection member 18 is provided inside the aforementioned housing 13. At this time, the electric device side connection member 18 is provided inside the housing 13 so as to correspond to an opening 23 formed on the front side of the lower end portion of the housing 13. That is, the electric device side connection member 18 is arranged on the front side of the lower end portion of the housing 13.

[0031] ​The motor-side connecting member 19 is a connector having first motor-side three-phase terminals 24 connected to the first motor 3 and second motor-side three-phase terminals 25 connected to the second motor 4. The first motor-side three-phase terminals 24 and the second motor-side three-phase terminals 25 are arranged in parallel. Specifically, the three terminals of the first motor-side three-phase terminals 24 are arranged in a row in series in front and back, the three terminals of the second motor-side three-phase terminals 25 are arranged in a row in series in front and back, and the three terminals arranged in series are arranged in parallel to each other.

[0032] The first motor-side three-phase terminals 24 are electrically connected to the first motor 3. Specifically, each of the three terminals of the first motor-side three-phase terminals 24 is electrically connected to each of the coils of the first motor 3 with a first connecting wire portion 26. The second motor-side three-phase terminals 25 are electrically connected to the second motor 4. Specifically, each of the three terminals of the second motor-side three-phase terminals 25 is electrically connected to each of the coils of the second motor 4 with a second connecting wire portion 27.

[0033] The motor-side connecting member 19 of this structure is provided to the housing 2. Specifically, the motor-side connecting member 19 is arranged in the housing 2 so as to correspond to an opening 28 formed in the front side of the upper end portion of the housing 2. That is, the motor-side connecting member 19 is arranged in the front end portion of the upper end portion of the housing 2. The motor-side connecting member 19 arranged in the housing 2 is positioned in front of the first motor 3 and above the second motor 4. In this way, in the present embodiment, the first motor-side three-phase terminals 24 of the connecting member 16 connected to the first motor 3 and the second motor-side three-phase terminals 25 of the connecting member 16 connected to the second motor 4 are arranged in parallel on the housing 2 side.

[0034] The conversion portion 20 has a conversion portion main body 29 and six motor-side electrical connecting portions 30 provided to the conversion portion main body 29. The six motor-side electrical connecting portions 30 are provided to the upper end portion of the conversion portion main body 29 in a state of being exposed outward from the conversion portion main body 29. The six motor-side electrical connecting portions 30 are arranged in series. Specifically, the six motor-side electrical connecting portions 30 are arranged in a row in the front and back direction.

[0035] The motor-side electrical connecting portions 30 are electrically connected to the equipment-side electrical connecting portions 21. Specifically, the motor-side electrical connecting portions 30 are directly connected to the equipment-side electrical connecting portions 21 without passing through a connecting wire portion or the like. The motor-side electrical connecting portions 30 are electrically connected to the first motor-side three-phase terminals 24 and the second motor-side three-phase terminals 25. Specifically, each of the three terminals of the first motor-side three-phase terminals 24 and the three terminals of the second motor-side three-phase terminals 25 is electrically connected to each of the six motor-side electrical connecting portions 30 with a connecting wire portion not shown.

[0036] Thus, the electric device side connecting member 18 and the motor side connecting member 19 are electrically connected via the conversion portion 20. Thereby, the first three-phase terminal 15 and the second three-phase terminal 17, which are arranged in series, and the first motor side three-phase terminal 24 and the second motor side three-phase terminal 25, which are arranged in parallel, are electrically connected using the conversion portion 20.

[0037] As Figure 2 shown in the drawing, in the present embodiment, the conversion portion 20 is provided at the upper end portion of the housing 2. Specifically, the conversion portion main body 29 is provided at the upper end portion of the housing 2 so as to close the opening 28 of the housing 2 in a state where the motor side electrical connecting portion 30 is located above. At this time, the gap between the conversion portion 20 and the housing 2 is sealed using a filler 31. This filler 31 is provided at a position around the opening 28 of the housing 2.

[0038] As Figure 2 shown in the drawing, when the electric device 5 is mounted on the housing 2, the aforementioned casing 13 is placed and fixed on the housing 2. At this time, the device side electrical connecting portion 21 of the electric device side connecting member 18 is directly connected with the motor side electrical connecting portion 30 of the conversion portion 20. In a state where the casing 13 is fixed on the housing 2, the gap between the conversion portion 20 and the casing 13 is sealed using a filler 32. This filler 32 is provided at a position around the opening 23 of the casing 13. Further, in the present embodiment, the length of the opening 28 of the housing 2 in the front-rear direction is shorter than the length of the opening 23 of the casing 13 in the front-rear direction. Therefore, the distance between the front end portion and the rear end portion of the filler 31, which seals the gap between the conversion portion 20 and the housing 2, is shorter than the distance between the front end portion and the rear end portion of the filler 32, which seals the gap between the conversion portion 20 and the casing 13.

[0039] Thus, the rotary electric drive unit 1 is assembled so that the electric device 5 is mounted on the housing 2. As Figure 2 shown in the drawing, in the electric connection structure of the present embodiment applied to the rotary electric drive unit 1, the virtual line 33 that passes through the centers of the first three-phase terminal 15 and the second three-phase terminal 17 arranged in series is a straight line along the front-rear direction, and is a straight line that extends horizontally. In addition, as Figure 2 shown in the drawing, the virtual line 34 that connects the center of the rotary shaft 6 of the first motor 3 and the center of the rotary shaft 7 of the second motor 4 is inclined with respect to the virtual line 33. That is, the virtual line 33 and the virtual line 34 are not parallel.

[0040] As Figure 2As shown, in the electrical connection structure of the present embodiment, the first three-phase terminal 15 and the second three-phase terminal 17 are arranged in series, and the first motor-side three-phase terminal 24 and the second motor-side three-phase terminal 25 are arranged in parallel, as described above. Therefore, the length of the motor-side connection member 19 in the front-rear direction is shorter than the length of the front-rear direction that is the direction in which the first three-phase terminal 15 and the second three-phase terminal 17 are arranged in the electrical equipment-side connection member 18.

[0041] In the case of the electrical connection structure of the present embodiment, the first three-phase terminal 15 and the second three-phase terminal 17 are arranged in series at the front end of the lower end portion of the casing 13, and the first motor-side three-phase terminal 24 and the second motor-side three-phase terminal 25 are arranged in parallel at the front end of the upper end portion of the housing 2. Therefore, according to the electrical connection structure of the present embodiment, compared with the conventional case in which the first three-phase terminal and the second three-phase terminal, and the first motor-side three-phase terminal and the second motor-side three-phase terminal are arranged in series, respectively, it is possible to suppress the housing 2 from protruding forward, and it is possible to realize a compact rotary electric drive unit 1.

[0042] Further, in the case of the electrical connection structure of the present embodiment, the virtual line 33 and the virtual line 34 are not parallel. Therefore, according to the electrical connection structure of the present embodiment, it is possible to arrange the first motor-side three-phase terminal 24 and the second motor-side three-phase terminal 25 in parallel in the space in front of the first motor 3 and above the second motor 4. That is, it is possible to arrange the first motor-side three-phase terminal 24 and the second motor-side three-phase terminal 25 in parallel in the space generated when the first motor 3 and the second motor 4 are arranged inside the housing 2.

[0043] Further, in the case of the electrical connection structure of the present embodiment, the length of the motor-side connection member 19 in the front-rear direction is shorter than the length of the electrical equipment-side connection member 18 in the front-rear direction. Therefore, it is possible to reduce the opening 28 of the housing 2, and it is possible to realize an increase in rigidity and NV performance.

[0044] Further, in the case of the electrical connection structure of the present embodiment, the electrical equipment-side connection member 18 is provided inside the casing 13, and the conversion portion 20 and the motor-side connection member 19 are provided inside the housing 2. Also, a floating mechanism is provided between the electrical equipment-side connection member 18 and the first three-phase terminal 15 and the second three-phase terminal 17. Therefore, it is possible to disperse structures that require space inside the casing 13 and the housing 2, and it is possible to effectively utilize the idle space.

[0045] Further, the present application is not limited to the above-described embodiments, and variations and modifications within the scope of achieving the object of the present application are included in the present application.

[0046] For example, the structure of the connection member 16 is not limited to the foregoing embodiment. That is, it is only necessary to electrically connect the first and second three-phase terminals arranged in series with the first and second motor-side three-phase terminals arranged in parallel.

[0047] Reference Signs

[0048] 2 housing

[0049] 3 first motor

[0050] 4 second motor

[0051] 5 electric device

[0052] 6 rotation axis

[0053] 7 rotation axis

[0054] 15 first three-phase terminal

[0055] 16 connection member

[0056] 17 second three-phase terminal

[0057] 18 electric device-side connection member

[0058] 19 motor-side connection member

[0059] 20 conversion portion

[0060] 24 first motor-side three-phase terminal

[0061] 25 second motor-side three-phase terminal

[0062] 33 virtual line

[0063] 34 virtual line

Claims

1. An electrical connection structure comprising: The housing, which internally houses the first and second electric motors; and, Electrical equipment controls either the aforementioned first motor or the aforementioned second motor; and... The first motor and the first three-phase terminals of the aforementioned electrical equipment are electrically connected via a connecting member, and the second motor and the second three-phase terminals of the aforementioned electrical equipment are electrically connected via the aforementioned connecting member; wherein, On the aforementioned electrical equipment side, the aforementioned first three-phase terminal and the aforementioned second three-phase terminal are connected in series; On the aforementioned housing side, the three-phase terminals of the first motor side connected to the aforementioned first motor and the three-phase terminals of the second motor side connected to the aforementioned second motor in the aforementioned connecting component are arranged in parallel along the vertical direction.

2. The electrical connection structure according to claim 1, wherein, The rotating shaft of the aforementioned first electric motor is located within the aforementioned housing, parallel to the rotating shaft of the aforementioned second electric motor; The virtual line connecting the rotating shaft of the first motor and the rotating shaft of the second motor is not parallel to the virtual line passing through the center of the first three-phase terminal and the second three-phase terminal arranged in series.

3. The electrical connection structure according to claim 1 or 2, wherein, The aforementioned connecting component has: The electrical equipment side connection component is electrically connected to the aforementioned first three-phase terminal and the aforementioned second three-phase terminal; The motor-side connection component has the aforementioned first motor-side three-phase terminal and the aforementioned second motor-side three-phase terminal; and, The conversion unit electrically connects the series-connected first three-phase terminals and the series-connected second three-phase terminals to the parallel-connected first motor-side three-phase terminals and the series-connected second motor-side three-phase terminals; and, The length in the motor-side connection component in the same direction as the aforementioned direction is shorter than the length in the direction in which the aforementioned first three-phase terminals and the aforementioned second three-phase terminals are arranged in the electrical equipment-side connection component.

4. The electrical connection structure according to claim 3, wherein, The aforementioned electrical equipment-side connection component is disposed on the aforementioned electrical equipment; The aforementioned conversion unit and the aforementioned motor-side connecting component are disposed in the aforementioned housing; A floating mechanism is provided between the aforementioned electrical equipment side connection component and the aforementioned first three-phase terminal and the aforementioned second three-phase terminal.

5. The electrical connection structure according to claim 1, wherein, On the aforementioned electrical equipment side, the aforementioned first three-phase terminals and the aforementioned second three-phase terminals are arranged in series in a row. The three-phase terminals of the first motor side are connected in series in one row, and the three-phase terminals of the second motor side are connected in series in one row. On the aforementioned housing side, the aforementioned first motor side three-phase terminals, which are connected in series, and the aforementioned second motor side three-phase terminals, which are connected in series, are arranged in parallel along the vertical direction.

6. The electrical connection structure according to claim 1, wherein, The aforementioned three-phase terminals on the first motor side and the aforementioned three-phase terminals on the second motor side are arranged at a position that overlaps with the aforementioned second motor in the vertical direction.

Images