Electric drive unit and vehicle

Abstract

Ensure insulation of the busbar connecting the motor terminals and the inverter terminals. [Solution] The first connecting piece 13 and the second connecting piece 23 are arranged side by side in the lateral direction H. The first connecting piece is located on one side in the lateral direction relative to the second connecting piece. The second connecting piece is located on the other side in the lateral direction relative to the first connecting piece. The first inverter-side terminal piece 12 and the second inverter-side terminal piece 22 are arranged side by side in the axial direction X. The first inverter-side terminal piece is bent in the other lateral direction from one axial end of the first connecting piece so as to be viewed in the vertical direction. The second inverter-side terminal piece is bent in the one lateral direction from one axial end of the second connecting piece so as to be viewed in the vertical direction. The first motor-side terminal piece is bent in the one lateral direction from the other axial end of the first connecting piece so as to be viewed in the axial direction. The second motor-side terminal piece is bent in the other lateral direction from the other axial end of the second connecting piece so as to be viewed in the axial direction.

Description

Technical Field

[0001] The present disclosure relates to an electric drive unit and a vehicle.

Background Art

[0002] In the drive device disclosed in Patent Document 1, a plurality of plate-shaped bus bars that connect a plurality of inverter connection terminals and a plurality of motor connection terminals are arranged so as to overlap in the thickness direction.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] In the bus bar arrangement described in Patent Document 1, since the plurality of plate-shaped bus bars are arranged so as to overlap in the thickness direction, adjacent bus bars may come into contact with each other, and insulation of the bus bars is not ensured.

[0005] An object of the present disclosure is to ensure insulation of bus bars that connect terminals of a motor and terminals of an inverter.

Means for Solving the Problem

[0006] The electric drive unit according to this disclosure comprises a motor arranged so as to extend horizontally in the axial direction, an inverter arranged above the motor and controlling the motor, a plate-shaped first busbar connecting the first motor terminal of the motor and the first inverter terminal of the inverter, and a plate-shaped second busbar connecting the second motor terminal of the motor and the second inverter terminal of the inverter, wherein the first busbar has a first motor-side terminal piece connected to the first motor terminal, a first inverter-side terminal piece connected to the first inverter terminal, and a first connecting piece connecting the first motor-side terminal piece and the first inverter-side terminal piece, and the second busbar has a second motor-side terminal piece connected to the second motor terminal, a second inverter-side terminal piece connected to the second inverter terminal, and a second connecting piece connecting the second motor-side terminal piece and the second inverter-side terminal piece, defining a lateral direction that extends horizontally and intersects the axial direction, and the first connecting piece and the second connecting piece The first and second inverter-side terminal pieces are arranged side by side in the lateral direction, with the first connecting piece positioned further lateral than the second connecting piece and extending from one axial direction to the other while facing the lateral direction, the second connecting piece is positioned further lateral than the first connecting piece and extending from one axial direction to the other while facing the lateral direction, the first inverter-side terminal piece and the second inverter-side terminal piece are arranged side by side in the axial direction, the first inverter-side terminal piece is bent from one axial end of the first connecting piece to the other lateral direction so as to face the vertical direction, the second inverter-side terminal piece is bent from one axial end of the second connecting piece to the one lateral direction so as to face the vertical direction, the first motor-side terminal piece is bent from the other axial end of the first connecting piece to the one lateral direction so as to face the axial direction, and the second motor-side terminal piece is bent from the other axial end of the second connecting piece to the other lateral direction so as to face the axial direction.

[0007] Contact between the first busbar and the second busbar can be suppressed. In particular, when the first inverter-side terminal piece and the second inverter-side terminal piece face each other in the vertical direction and are aligned axially, and the first motor-side terminal piece and the second motor-side terminal piece face each other in the axial direction, a space can be secured between the first connecting piece and the second connecting piece, thereby suppressing contact between the first connecting piece and the second connecting piece.

[0008] This ensures insulation of the busbar connecting the motor terminals and the inverter terminals.

[0009] In one embodiment, the electric drive unit includes a plate-shaped third busbar connecting the third motor terminal of the motor and the third inverter terminal of the inverter, the third busbar having a third motor-side terminal piece connected to the third motor terminal, a third inverter-side terminal piece connected to the third inverter terminal, and a third connecting piece connecting the third motor-side terminal piece and the third inverter-side terminal piece, the third connecting piece being arranged side by side in the lateral direction between the first connecting piece and the second connecting piece and extending from one side in the axial direction to the other while facing the lateral direction, the third inverter-side terminal piece being arranged side by side in the axial direction with the first inverter-side terminal piece and the second inverter-side terminal piece and bending from one end in the axial direction of the third connecting piece to the other side in the lateral direction so as to face the vertical direction, and the third motor-side terminal piece being bent from the other end in the axial direction of the third connecting piece to one side in the vertical direction so as to face the axial direction.

[0010] This prevents the first busbar, the second busbar, and the third busbar from coming into contact with each other.

[0011] In one embodiment, the electric drive unit includes a plate-shaped fourth busbar connecting the fourth motor terminal of the motor and the fourth inverter terminal of the inverter. The fourth busbar has a fourth motor-side terminal piece connected to the fourth motor terminal, a fourth inverter-side terminal piece connected to the fourth inverter terminal, and a fourth connecting piece connecting the fourth motor-side terminal piece and the fourth inverter-side terminal piece. The fourth connecting piece is arranged side-by-side in the lateral direction between the second connecting piece and the third connecting piece, and extends from one axial direction to the other while facing the lateral direction. The fourth inverter-side terminal piece is arranged side-by-side in the axial direction with the first inverter-side terminal piece, the second inverter-side terminal piece, and the third inverter-side terminal piece, and is bent in one lateral direction from one axial end of the fourth connecting piece so as to face the vertical direction. The fourth motor-side terminal piece is bent in the other vertical direction from the other axial end of the fourth connecting piece so as to face the axial direction.

[0012] Contact between the first busbar, the second busbar, the third busbar, and the fourth busbar can be prevented.

[0013] In one embodiment, the electric drive unit includes a plate-shaped third busbar connecting the third motor terminal of the motor and the third inverter terminal of the inverter, the third busbar having a third motor-side terminal piece connected to the third motor terminal, a third inverter-side terminal piece connected to the third inverter terminal, and a third connecting piece connecting the third motor-side terminal piece and the third inverter-side terminal piece, the third connecting piece being arranged side by side in the lateral direction between the first connecting piece and the second connecting piece and extending from one axial direction to the other while facing the vertical direction, the third inverter-side terminal piece being arranged side by side in the axial direction with the first inverter-side terminal piece and the second inverter-side terminal piece and extending from one axial end of the third connecting piece to the other vertical direction and then bending to the other lateral direction so as to face the vertical direction, and the third motor-side terminal piece bending from the other axial end of the third connecting piece to one vertical direction so as to face the axial direction.

[0014] This prevents the first busbar, the second busbar, and the third busbar from coming into contact with each other.

[0015] In one embodiment, the electric drive unit includes a plate-shaped fourth busbar connecting the fourth motor terminal of the motor and the fourth inverter terminal of the inverter. The fourth busbar has a fourth motor-side terminal piece connected to the fourth motor terminal, a fourth inverter-side terminal piece connected to the fourth inverter terminal, and a fourth connecting piece connecting the fourth motor-side terminal piece and the fourth inverter-side terminal piece. The fourth connecting piece is arranged horizontally between the first connecting piece and the second connecting piece, and is arranged vertically alongside the third connecting piece on the other side of the vertical direction, and extends from one side in the axial direction to the other while facing the vertical direction. The fourth inverter-side terminal piece is arranged vertically alongside the first inverter-side terminal piece, the second inverter-side terminal piece, and the third inverter-side terminal piece, and is connected to one end of the fourth connecting piece in the axial direction while facing the vertical direction. The fourth motor-side terminal piece bends from the other end of the fourth connecting piece in the axial direction to the other side in the vertical direction while facing the axial direction.

[0016] Contact between the first busbar, the second busbar, the third busbar, and the fourth busbar can be prevented.

[0017] The vehicle relating to this disclosure is equipped with an electric drive unit. [Effects of the Invention]

[0018] According to this disclosure, the objective is to ensure the insulation of the busbar connecting the motor terminals and the inverter terminals. [Brief explanation of the drawing]

[0019] [Figure 1] Figure 1 shows a perspective view of an electric drive unit according to the first embodiment. [Figure 2]FIG. 2 is a front view showing the electric drive unit according to the first embodiment as viewed from the front. [Figure 3] FIG. 3 is a perspective view showing the terminal block according to the first embodiment. [Figure 4] FIG. 4 is a perspective view showing the bus bar according to the first embodiment. [Figure 5] FIG. 5 is a front view showing the bus bar according to the first embodiment as viewed from the front. [Figure 6] FIG. 6 is a perspective view showing the bus bar according to the second embodiment. [Description of Embodiments]

[0020] Hereinafter, embodiments of the present disclosure will be described in detail based on the drawings. The following description of preferred embodiments is merely exemplary in nature and is in no way intended to limit the present disclosure, its applications, or its uses.

[0021] In the following description, front, rear, left, right, upper, and lower are based on the arrows shown in FIG. 1. Each direction is independent of the viewpoint of the driver boarding the vehicle.

[0022] <First Embodiment> The first embodiment will be described.

[0023] (Electric Drive Unit) FIG. 1 is a perspective view showing the electric drive unit 1. FIG. 2 is a front view showing the electric drive unit 1 as viewed from the front.

[0024] The electric drive unit 1 is mounted on a vehicle 2. The vehicle 2 includes the electric drive unit 1. The electric drive unit 1 is arranged, for example, in a motor room at the front portion of the vehicle 2. The electric drive unit 1 constitutes a power unit of the vehicle 2.

[0025] The electric drive unit 1 includes a motor 50, an inverter 60, a terminal block 70, a first bus bar 10, a second bus bar 20, a third bus bar 30, and a fourth bus bar 40.

[0026] (motor) The motor 50 is positioned so that its axial direction X extends horizontally. The axial direction X of the motor 50 extends horizontally. In this example, the axial direction X of the motor 50 extends in the front-to-back direction within the horizontal. The horizontal direction is perpendicular to the vertical direction. One end of the axial direction X is the rear. The other end of the axial direction X is the front.

[0027] The motor 50 includes a drive shaft (not shown), a rotor (not shown), a stator 51, and a housing 52. The drive shaft extends in the axial direction X. The rotor is cylindrical and extends in the axial direction X, and is fixed to the outer circumference of the drive shaft.

[0028] The stator 51 is cylindrical, extending in the axial direction X, and is positioned on the outer circumference of the rotor. A gap is formed between the rotor and the stator 51. The stator 51 is fixed to the inner circumferential surface of the cylindrical portion of the housing 52. Coils (not shown) are wound around the teeth of the stator 51. There are three types of coils: U-phase, V-phase, and W-phase in three-phase AC.

[0029] The motor 50 has a first motor terminal 53a, a second motor terminal 53b, a third motor terminal 53c, and a fourth motor terminal 53d. The first motor terminal 53a corresponds to the U phase and is connected to the U phase coil of the stator 51 via a cable 54. The second motor terminal 53b corresponds to the V phase and is connected to the V phase coil of the stator 51 via a cable 54. The third motor terminal 53c corresponds to the W phase and is connected to the W phase coil of the stator 51 via a cable 54. The fourth motor terminal 53d corresponds to the neutral point and is connected to the neutral point of the stator 51 via a cable 54. The neutral point is the point in a three-phase alternating current where the voltage is always zero.

[0030] Furthermore, the motor 50 may also function as a generator that performs regenerative power generation when the vehicle 2 is decelerating or when the vehicle 2 is traveling downhill.

[0031] (Inverter) The inverter 60 is positioned above the motor 50. The vertical direction is perpendicular to the horizontal direction. One of the vertical directions is considered downwards. The other of the vertical directions is considered upwards.

[0032] The inverter 60 controls the motor 50. More specifically, the inverter 60 controls the power supplied to the motor 50 from a battery (not shown). The inverter 60 is interposed between the motor 50 and the battery. The inverter 60 includes a smoothing capacitor 61, a control board 62, and a case 63.

[0033] The smoothing capacitor 61 is connected to the battery via two (positive and negative) DC busbars 64. The smoothing capacitor 61 smooths the power from the battery.

[0034] The control board 62 is connected to the smoothing capacitor 61. Power semiconductors such as IGBTs or MOSFETs are mounted on the control board 62. An inverter circuit is configured on the control board 62. The control board 62 includes a power module. The control board 62 controls the power input to the motor 50. The smoothing capacitor 61 and the control board 62 in the inverter 60 convert the power from the battery from DC to AC and supply it to the motor 50, and also control the motor 50 (specifically, they control the power supplied from the battery to the motor 50).

[0035] Here, we define a lateral direction H that extends horizontally and intersects the axial direction X of the motor 50. More specifically, the lateral direction H extends horizontally and is perpendicular to the axial direction X of the motor 50. In this example, the lateral direction H extends horizontally in the left-right direction. One end of the lateral direction H is designated as the right side. The other end of the lateral direction H is designated as the left side.

[0036] Case 63 extends longitudinally in the lateral direction H and transversely in the axial direction X. Case 63 is fixed to the top of the motor 50. Case 63 is a roughly rectangular box shape with an open top. Inside case 63, from right to left, are arranged a smoothing capacitor 61, a control board 62, and inverter terminals 66a to 66d, which will be described later.

[0037] The inverter 60 has a first inverter terminal 66a, a second inverter terminal 66b, a third inverter terminal 66c, and a fourth inverter terminal 66d. These inverter terminals 66a to 66d are located towards the left within the case 63.

[0038] The first inverter terminal 66a corresponds to the U phase and is connected to the control board 62 via the AC busbar 65 for the U phase. The second inverter terminal 66b corresponds to the V phase and is connected to the control board 62 via the AC busbar 65 for the V phase. The third inverter terminal 66c corresponds to the W phase and is connected to the control board 62 via the AC busbar 65 for the W phase. The fourth inverter terminal 66d corresponds to the neutral point. The fourth inverter terminal 66d may be grounded.

[0039] The first inverter terminal 66a, the third inverter terminal 66c, the second inverter terminal 66b, and the fourth inverter terminal 66d are arranged in that order from rear to front in the axial direction X.

[0040] (terminal block) Figure 3 shows a perspective view of the terminal block 70. The terminal block 70 is made of resin. The terminal block 70 is formed by injection molding (more specifically, mold molding). The terminal block 70 is formed in a roughly rod shape extending in the axial direction X. Here, a housing hole 63a extending in the axial direction X is formed in the left-leaning portion of the case 63 of the inverter 60. The terminal block 70 is inserted into the housing hole 63a.

[0041] The terminal block 70 holds the busbars 10 to 40, which will be described later. The terminal block 70 is molded while holding the busbars 10 to 40, which will be described later. The terminal block 70 insulates the busbars 10 to 40 from each other with resin.

[0042] (Bus bar) Figure 4 shows busbars 10-40 in a perspective view. Figure 5 shows busbars 10-40 in a front view.

[0043] The first bus bar 10 is plate-shaped. The second bus bar 20 is plate-shaped. The third bus bar 30 is plate-shaped. The fourth bus bar 40 is plate-shaped.

[0044] The first busbar 10 connects the first motor terminal 53a of the motor 50 to the first inverter terminal 66a of the inverter 60. The second busbar 20 connects the second motor terminal 53b of the motor 50 to the second inverter terminal 66b of the inverter 60. The third busbar 30 connects the third motor terminal 53c of the motor 50 to the third inverter terminal 66c of the inverter 60. The fourth busbar 40 connects the fourth motor terminal 53d of the motor 50 to the fourth inverter terminal 66d of the inverter 60.

[0045] The first busbar 10 has a first motor-side terminal piece 11, a first inverter-side terminal piece 12, and a first connecting piece 13. The first motor-side terminal piece 11 is connected to the first motor terminal 53a. The first inverter-side terminal piece 12 is connected to the first inverter terminal 66a. The first connecting piece 13 connects the first motor-side terminal piece 11 and the first inverter-side terminal piece 12.

[0046] The second busbar 20 has a second motor-side terminal piece 21, a second inverter-side terminal piece 22, and a second connecting piece 23. The second motor-side terminal piece 21 is connected to the second motor terminal 53b. The second inverter-side terminal piece 22 is connected to the second inverter terminal 66b. The second connecting piece 23 connects the second motor-side terminal piece 21 and the second inverter-side terminal piece 22.

[0047] The third busbar 30 has a third motor-side terminal piece 31, a third inverter-side terminal piece 32, and a third connecting piece 33. The third motor-side terminal piece 31 is connected to the third motor terminal 53c. The third inverter-side terminal piece 32 is connected to the third inverter terminal 66c. The third connecting piece 33 connects the third motor-side terminal piece 31 and the third inverter-side terminal piece 32.

[0048] The fourth busbar 40 has a fourth motor-side terminal piece 41, a fourth inverter-side terminal piece 42, and a fourth connecting piece 43. The fourth motor-side terminal piece 41 is connected to the fourth motor terminal 53d. The fourth inverter-side terminal piece 42 is connected to the fourth inverter terminal 66d. The fourth connecting piece 43 connects the fourth motor-side terminal piece 41 and the fourth inverter-side terminal piece 42.

[0049] The first connecting piece 13 and the second connecting piece 23 are arranged side by side in the lateral direction H (left-right direction). The first connecting piece 13 is located to the right of the second connecting piece 23 in the lateral direction H (left-right direction). The second connecting piece 23 is located to the left of the first connecting piece 13 in the lateral direction H (left-right direction).

[0050] The first connecting piece 13 faces the lateral direction H (left-right direction) and extends from one side (rear) to the other side (front) in the axial direction X (front-back direction). The second connecting piece 23 faces the lateral direction H (left-right direction) and extends from one side (rear) to the other side (front) in the axial direction X (front-back direction).

[0051] The third connecting piece 33 is positioned between the first connecting piece 13 and the second connecting piece 23, aligned in the lateral direction H (left-right direction). The third connecting piece 33 faces the lateral direction H (left-right direction) and extends from one side (rear) to the other side (front) in the axial direction X (front-back direction).

[0052] The fourth connecting piece 43 is positioned between the second connecting piece 23 and the third connecting piece 33, aligned in the lateral direction H (left-right direction). The fourth connecting piece 43 faces the lateral direction H (left-right direction) and extends from one side (rear) to the other side (front) in the axial direction X (front-back direction).

[0053] The first connecting piece 13, the third connecting piece 33, the fourth connecting piece 43, and the second connecting piece 23 are arranged in that order from one side (right) to the other side (left) in the horizontal direction H (left-right direction).

[0054] The first inverter-side terminal piece 12 and the second inverter-side terminal piece 22 are arranged side by side in the axial direction X (front-to-back direction). The first inverter-side terminal piece 12 is bent from one end 13a (rear end) in the axial direction X (front-to-back direction) of the first connecting piece 13 to the other side (left) in the lateral direction H (left-to-right direction) so as to face up and down. More specifically, the first inverter-side terminal piece 12 extends from the other end (up) in the vertical direction of the one end 13a (rear end) in the axial direction X (front-to-back direction) of the first connecting piece 13 to the other side (up) in the vertical direction by a connecting piece 14 (facing in the lateral direction H), and then bends to the other side (left) in the lateral direction H (left-to-right direction) so as to face up and down.

[0055] The second inverter-side terminal piece 22 is bent to one side (to the right) in the lateral direction H (left-right direction) from one end 23a (rear end) in the axial direction X (front-back direction) of the second connecting piece 23 so as to face up and down. More specifically, the second inverter-side terminal piece 22 extends upward from the other end (upper end) in the vertical direction of the axial direction X (front-back direction) of the second connecting piece 23, via a connecting piece 24 (facing in the lateral direction H), and then bends to one side (to the right) in the lateral direction H (left-right direction) so as to face up and down.

[0056] The third inverter-side terminal piece 32 is arranged in the axial direction X (front-to-back direction) alongside the first inverter-side terminal piece 12 and the second inverter-side terminal piece 22. The third inverter-side terminal piece 32 is bent from one end 33a (rear end) in the axial direction X (front-to-back direction) of the third connecting piece 33 to the other side (left) in the lateral direction H (left-to-right direction) so as to face up and down. More specifically, the third inverter-side terminal piece 32 extends from the other end (up) in the vertical direction of the one end 33a (rear end) in the axial direction X (front-to-back direction) of the third connecting piece 33 to the other side (up) in the vertical direction by a connecting piece 34 (facing in the lateral direction H), and then bends to the other side (left) in the lateral direction H (left-to-right direction) so as to face up and down.

[0057] The fourth inverter-side terminal piece 42 is arranged in the axial direction X (front-to-back direction) alongside the first inverter-side terminal piece 12, the second inverter-side terminal piece 22, and the third inverter-side terminal piece 32. The fourth inverter-side terminal piece 42 is bent to one side (to the right) in the lateral direction H (left-to-right direction) from one end 43a (rear end) in the axial direction X (front-to-back direction) of the fourth connecting piece 43 so as to face up and down. More specifically, the fourth inverter-side terminal piece 42 extends upward from the other end (upper end) in the vertical direction of the one end 43a (rear end) in the axial direction X (front-to-back direction) of the fourth connecting piece 43 by a connecting piece 44 (facing in the lateral direction H), and then bends to one side (to the right) in the lateral direction H (left-to-right direction) so as to face up and down.

[0058] The terminal pieces 12 on the first inverter side, 32 on the third inverter side, 22 on the second inverter side, and 42 on the fourth inverter side are arranged in that order from one side (rear) to the other (front) in the axial direction X (front-back direction).

[0059] The first inverter-side terminal piece 12, the second inverter-side terminal piece 22, the third inverter-side terminal piece 32, and the fourth inverter-side terminal piece 42 are all in the same position relative to each other in the vertical direction.

[0060] In the terminal block 70, the first inverter-side terminal piece 12, the second inverter-side terminal piece 22, the third inverter-side terminal piece 32, and the fourth inverter-side terminal piece 42 are exposed to the outside.

[0061] The first motor-side terminal piece 11 is bent to one side (to the right) in the lateral direction H (left-right direction) from the other end 13b (front end) of the first connecting piece 13 in the axial direction X (front-back direction), so as to face the axial direction X (front-back direction).

[0062] The second motor-side terminal piece 21 is bent to the left in the lateral direction (left-right direction) from the other end 23b (front end) of the second connecting piece 23 in the axial direction X (front-back direction), so as to face the axial direction X (front-back direction).

[0063] The third motor-side terminal piece 31 is bent downwards in the vertical direction, facing axial X (front-to-back direction), from the other end 33b (front end) of the third connecting piece 33 in the axial direction X (front-to-back direction). More specifically, the third motor-side terminal piece 31 extends to the other side (left side) in the lateral direction H (left-to-right direction) from the other end 33b (front end) of the third connecting piece 33 in the axial direction X (front-to-back direction), via the connecting piece 35 (facing axial X), and then bends downwards in the vertical direction, facing axial X (front-to-back direction) (see Figure 5).

[0064] The fourth motor-side terminal piece 41 is bent upwards in the vertical direction from the other end 43b (front end) in the axial direction X (front-back direction) of the fourth connecting piece 43 so as to face the axial direction X (front-back direction). The fourth motor-side terminal piece 41 extends to one side (right side) in the lateral direction H (left-right direction) from one side (right side) in the lateral direction H (left-right direction) of the other end 43b (front end) in the axial direction X (front-back direction) of the fourth connecting piece 43 by the connecting piece 45 (facing the axial direction X), and then bends upwards in the vertical direction so as to face the axial direction X (front-back direction).

[0065] The first motor-side terminal piece 11, the second motor-side terminal piece 21, and the third motor-side terminal piece 31 are at the same position (flush surface) with respect to each other in the axial direction X (front-to-back direction). The fourth motor-side terminal piece 41 may be positioned offset to the other (forward) in the axial direction X (front-to-back direction) with respect to the first motor-side terminal piece 11, the second motor-side terminal piece 21, and the third motor-side terminal piece 31.

[0066] In the terminal block 70, the first motor-side terminal piece 11, the second motor-side terminal piece 21, the third motor-side terminal piece 31, and the fourth motor-side terminal piece 41 are exposed to the outside.

[0067] (Effects and Benefits) Contact between the first busbar 10 and the second busbar 20 can be suppressed. In particular, when the first inverter-side terminal piece 12 and the second inverter-side terminal piece 22 face each other in the vertical direction and are aligned in the axial direction (front-to-back direction), and the first motor-side terminal piece 11 and the second motor-side terminal piece 21 face each other in the axial direction (front-to-back direction), a space S can be secured between the first connecting piece 13 and the second connecting piece 23, thereby suppressing contact between the first connecting piece 13 and the second connecting piece 23.

[0068] Furthermore, contact between the first busbar 10, the second busbar 20, the third busbar 30, and the fourth busbar 40 can also be suppressed.

[0069] This ensures insulation between the busbars (first busbar 10, second busbar 20, third busbar 30, and fourth busbar 40) connecting the terminals of the motor 50 (first motor terminal 53a, second motor terminal 53b, third motor terminal 53c, and fourth motor terminal 53d) and the terminals of the inverter 60 (first inverter terminal 66a, second inverter terminal 66b, third inverter terminal 66c, and fourth inverter terminal 66d).

[0070] <Second Embodiment> A second embodiment will now be described. In the following description, components similar to those in the above embodiment will be denoted by the same reference numerals, and detailed descriptions will be omitted. Figure 6 shows a perspective view of busbars 10 to 40 according to the second embodiment.

[0071] The third connecting piece 33 is positioned between the first connecting piece 13 and the second connecting piece 23, aligned in the lateral direction H (left-right direction). More specifically, the third connecting piece 33 is positioned between one end (lower end) in the vertical direction of the first connecting piece 13 and one end (lower end) in the vertical direction of the second connecting piece 23, aligned in the lateral direction H (left-right direction). The third connecting piece 33 faces the vertical direction and extends from one side (rear) to the other side (front) in the axial direction X (front-back direction).

[0072] The third inverter-side terminal piece 32 is arranged in the axial direction X (front-to-back direction) alongside the first inverter-side terminal piece 12 and the second inverter-side terminal piece 22. The third inverter-side terminal piece 32 extends upward from one end 33a (rear end) in the axial direction X (front-to-back direction) of the third connecting piece 33 (by a connecting piece 36 facing in the lateral direction H), and then bends to the other side (left) in the lateral direction H (left-to-right direction) so as to face the vertical direction. More specifically, the third inverter-side terminal piece 32 extends upward from one end 33a (rear end) in the lateral direction H (left-to-right direction) of the third connecting piece 33 (rear end) in the axial direction X (front-to-back direction), by a connecting piece 36 facing in the lateral direction H (left-to-right direction), and then bends to the other side (left) in the lateral direction H (left-to-right direction) so as to face the vertical direction.

[0073] The third motor-side terminal piece 31 is bent downwards in one direction (upper) from the other end 33b (front end) of the third connecting piece 33 in the axial direction X (front-back direction), so as to face the axial direction X (front-back direction).

[0074] The fourth connecting piece 43 is positioned between the first connecting piece 13 and the second connecting piece 23, aligned in the lateral direction H (left-right direction). More specifically, the fourth connecting piece 43 is positioned between the other end (upper end) in the vertical direction of the first connecting piece 13 and the other end (upper end) in the vertical direction of the second connecting piece 23, aligned in the lateral direction H (left-right direction). The fourth connecting piece 43 is located above the third connecting piece 33 in the vertical direction. The fourth connecting piece 43 is positioned above the third connecting piece 33 in the vertical direction, aligned with the third connecting piece 33 in the vertical direction. The fourth connecting piece 43 faces the vertical direction and extends from one side (rear) to the other side (front) in the axial direction X (front-back direction).

[0075] The fourth inverter-side terminal piece 42 is arranged in the axial direction X (front-to-back direction) alongside the first inverter-side terminal piece 12, the second inverter-side terminal piece 22, and the third inverter-side terminal piece 32. The fourth inverter-side terminal piece 42 is connected to one end 43a (rear end) of the fourth connecting piece 43 in the axial direction X, facing in the vertical direction. It can also be said that the fourth inverter-side terminal piece 42 is composed of one end 43a (rear end) of the fourth connecting piece 43 in the axial direction X.

[0076] The first inverter-side terminal piece 12, the second inverter-side terminal piece 22, the third inverter-side terminal piece 32, and the fourth inverter-side terminal piece 42 are all in the same position relative to each other in the vertical direction.

[0077] The fourth motor-side terminal piece 41 is bent upwards in the vertical direction from the other end 43b (front end) of the fourth connecting piece 43 in the axial direction X (front-rear direction), so as to face the axial direction X (front-rear direction).

[0078] The first motor-side terminal piece 11, the second motor-side terminal piece 21, and the third motor-side terminal piece 31 are at the same position (flush surface) with respect to each other in the axial direction X (front-to-back direction). The fourth motor-side terminal piece 41 may be positioned offset to the other (forward) in the axial direction X (front-to-back direction) with respect to the first motor-side terminal piece 11, the second motor-side terminal piece 21, and the third motor-side terminal piece 31.

[0079] The other configurations are the same as in the first embodiment.

[0080] This also prevents the first busbar 10, the second busbar 20, the third busbar 30, and the fourth busbar 40 from coming into contact with each other.

[0081] <Other Embodiments> Although this disclosure has been described above with reference to preferred embodiments, this description is not limiting, and various modifications, substitutions, or combinations are, of course, possible.

[0082] One side of the horizontal direction H may be defined as the left, and the other side as the right. One side of the axial direction X may be defined as the front, and the other side as the rear. One side of the vertical direction may be defined as the top, and the other side as the bottom.

[0083] The axis direction X may also be defined as the left-right direction. In this case, the lateral direction H becomes the front-back direction.

[0084] The third bus bar 30 and the fourth bus bar 40 are optional.

[0085] The electric drive unit 1 does not necessarily have to be applied to the vehicle 2. [Industrial applicability]

[0086] This disclosure is extremely useful and has high industrial applicability because it can be applied to electric drive units and vehicles. [Explanation of Symbols]

[0087] X-axis direction H Horizontal S Space 1 Electric drive unit 2 vehicles 10 First Bus Bar 11. First motor side terminal piece 12. Terminal piece on the first inverter side 13. First connecting piece 13a One end 13b Other end 20 Second Bus Bar 21 Second motor side terminal piece 22 Second inverter side terminal piece 23 Second connecting piece 23a One end 23b Other end 30 Third Bus Bar 31 Third motor side terminal piece 32 Third inverter side terminal piece 33 Third connecting piece 33a One end 33b Other end 40. Bus Bar No. 4 41. Fourth motor side terminal piece 42. Terminal piece for the 4th inverter side 43 Fourth connecting piece 43a One end 43b Other end 50 motors 53a First motor terminal 53b Second motor terminal 53c Third motor terminal 53d 4th motor terminal 60 Inverters 66a First Inverter Terminal 66b Second inverter terminal 66c Third Inverter Terminal 66d 4th Inverter Terminal

Claims

1. A motor arranged so that its axial direction extends horizontally, An inverter positioned above the motor and controlling the motor, A plate-shaped first busbar connects the first motor terminal of the motor and the first inverter terminal of the inverter, The system includes a plate-shaped second busbar connecting the second motor terminal of the motor and the second inverter terminal of the inverter, The first busbar is, The first motor-side terminal piece connected to the first motor terminal, A first inverter-side terminal piece connected to the first inverter terminal, It has a first connecting piece that connects the first motor-side terminal piece and the first inverter-side terminal piece, The second busbar is, The second motor-side terminal piece connected to the second motor terminal, A second inverter-side terminal piece connected to the second inverter terminal, It has a second connecting piece that connects the second motor-side terminal piece and the second inverter-side terminal piece, A lateral direction is defined that extends horizontally and intersects the axial direction of the motor, The first connecting piece and the second connecting piece are arranged side by side in the lateral direction, The first connecting piece is located in one of the lateral directions relative to the second connecting piece, and extends from one axial direction to the other while facing the lateral direction. The second connecting piece is located on the other side of the lateral direction from the first connecting piece, and extends from one side in the axial direction to the other while facing the lateral direction. The first inverter-side terminal piece and the second inverter-side terminal piece are arranged side by side in the axial direction. The first inverter-side terminal piece is bent in the other lateral direction from one end in the axial direction of the first connecting piece so as to face up and down. The second inverter-side terminal piece is bent in one of the lateral directions from one end of the axial direction of the second connecting piece so as to face the vertical direction. The first motor-side terminal piece is bent in one of the lateral directions from the other axial end of the first connecting piece so as to face in the axial direction, The second motor-side terminal piece is bent in the other lateral direction from the other axial end of the second connecting piece so as to face the axial direction, in an electric drive unit.

2. The motor is provided with a third motor terminal and the inverter is provided with a third busbar, which is a plate-shaped busbar connecting the third motor terminal of the motor and the third inverter terminal of the inverter. The third busbar is, The third motor side terminal piece connected to the third motor terminal, A third inverter-side terminal piece connected to the third inverter terminal, It has a third connecting piece that connects the third motor-side terminal piece and the third inverter-side terminal piece, The third connecting piece is positioned between the first connecting piece and the second connecting piece in the lateral direction, and extends from one axial direction to the other while facing the lateral direction. The third inverter-side terminal piece is arranged in the axial direction alongside the first inverter-side terminal piece and the second inverter-side terminal piece, and is bent from one end of the third connecting piece in the axial direction toward the other end in the lateral direction, The electric drive unit according to claim 1, wherein the third motor-side terminal piece is bent in one of the vertical directions so as to face the other end of the third connecting piece in the axial direction in the axial direction.

3. The motor is provided with a plate-shaped fourth busbar that connects the fourth motor terminal of the motor to the fourth inverter terminal of the inverter. The fourth busbar is, The fourth motor side terminal piece connected to the fourth motor terminal, The fourth inverter side terminal piece connected to the fourth inverter terminal, It has a fourth connecting piece that connects the fourth motor-side terminal piece and the fourth inverter-side terminal piece, The fourth connecting piece is positioned between the second connecting piece and the third connecting piece in the lateral direction, and extends from one axial direction to the other while facing the lateral direction. The fourth inverter-side terminal piece is arranged in the axial direction alongside the first inverter-side terminal piece, the second inverter-side terminal piece, and the third inverter-side terminal piece, and is bent in one of the lateral directions from one end of the fourth connecting piece in the axial direction so as to face the vertical direction. The electric drive unit according to claim 2, wherein the fourth motor-side terminal piece is bent in the other direction in the vertical direction from the other end in the axial direction of the fourth connecting piece, facing in the axial direction.

4. The motor is provided with a third motor terminal and the inverter is provided with a third busbar, which is a plate-shaped busbar connecting the third motor terminal of the motor and the third inverter terminal of the inverter. The third busbar is, The third motor side terminal piece connected to the third motor terminal, A third inverter-side terminal piece connected to the third inverter terminal, It has a third connecting piece that connects the third motor-side terminal piece and the third inverter-side terminal piece, The third connecting piece is positioned between the first connecting piece and the second connecting piece in the lateral direction, and extends from one axial direction to the other while facing the vertical direction. The third inverter-side terminal piece is arranged in the axial direction alongside the first inverter-side terminal piece and the second inverter-side terminal piece, and extends from one end of the third connecting piece in the axial direction to the other in the vertical direction, and then bends to the other in the horizontal direction so as to face the vertical direction. The electric drive unit according to claim 1, wherein the third motor-side terminal piece is bent in one of the vertical directions so as to face the other end of the third connecting piece in the axial direction in the axial direction.

5. The motor is provided with a plate-shaped fourth busbar that connects the fourth motor terminal of the motor to the fourth inverter terminal of the inverter. The fourth busbar is, The fourth motor side terminal piece connected to the fourth motor terminal, The fourth inverter side terminal piece connected to the fourth inverter terminal, It has a fourth connecting piece that connects the fourth motor-side terminal piece and the fourth inverter-side terminal piece, The fourth connecting piece is positioned between the first connecting piece and the second connecting piece in the lateral direction, and is positioned alongside the third connecting piece in the vertical direction on the other side of the vertical direction, and extends from one side in the axial direction to the other while facing the vertical direction. The fourth inverter-side terminal piece is arranged in the axial direction alongside the first inverter-side terminal piece, the second inverter-side terminal piece, and the third inverter-side terminal piece, and is connected to one end of the fourth connecting piece in the axial direction so as to face the vertical direction. The electric drive unit according to claim 4, wherein the fourth motor-side terminal piece is bent in the other direction in the vertical direction from the other end in the axial direction of the fourth connecting piece so as to face in the axial direction.

6. A vehicle comprising an electric drive unit according to any one of claims 1 to 5.

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