Rotary electric machine

Abstract

To integrate a flow path through which a refrigerant flows with a housing and a terminal strip, and to suppress leakage of the refrigerant between the housing and the terminal strip.SOLUTION: The rotary electric machine includes a housing in which a stator is accommodated, and a terminal strip attached to the housing. The housing is provided with a stator cooling passage through which a coolant for cooling the stator flows. The terminal strip includes a resin-made structural body, a wire held by the resin-made structural body and electrically connected to the stator, and a metal-made reinforcing member. And a cooling-side flow path through which a refrigerant for terminal strip the wiring flows. The attachment surface is provided with an opening that allows the stator coolant passage and the terminal strip side passage to communicate with each other, and a seal portion that is provided around the opening and in which a seal member is disposed. The reinforcing member is embedded in the resin structure, and extends parallel to the attachment surface so as to face the seal part.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present disclosure relates to a rotating electric machine. [Background technology]

[0002] When a rotating electric machine is in operation, it generates heat due to copper loss and iron loss. A large current flows through the rotating electric machine, which serves as a drive source mounted on a vehicle. As a result, the amount of heat generated by the rotating electric machine is large. It is common to cool the rotating electric machine by circulating a refrigerant to suppress temperature increases in the rotating electric machine. The same applies to current-carrying parts such as terminal blocks attached to the rotating electric machine.

[0003] Patent Document 1 discloses a rotating electric machine in which a terminal block is attached to the top of a refrigerant flow path. Patent Document 2 discloses a rotating electric machine in which a terminal block is attached to the side of a refrigerant flow path. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-296103 [Patent Document 2] US2022 / 0037963A1 Summary of the Invention [Problem to be solved by the invention]

[0005] This type of rotating electric machine includes a housing that houses a stator and a terminal block attached to the housing. The housing is provided with a stator cooling passage through which a coolant flows to cool the stator. The coolant flowing through the stator cooling passage suppresses a rise in temperature of the stator.

[0006] The terminal block is provided with wiring that is electrically connected to the stator, and it is necessary to suppress temperature rise in the wiring of the terminal block as well, just like the stator.

[0007] Therefore, a terminal block-side flow path for cooling the wiring is provided in the terminal block, and the terminal block-side flow path is connected to the stator cooling flow path, thereby integrating the stator cooling flow path of the housing and the terminal block-side flow path of the terminal block.

[0008] In this case, the terminal block has a mounting surface that is attached to the housing. The mounting surface has an opening that connects the stator cooling flow path and the terminal block side flow path. The mounting surface also has a seal portion that is provided around the opening and in which a seal member is disposed. The seal member seals the gap between the mounting surface of the terminal block and the housing.

[0009] However, when a terminal block is manufactured by resin molding, the sealing portion (where the sealing member is placed) on the mounting surface of the terminal block may become distorted due to shrinkage cavities or the like. In this case, the adhesion between the mounting surface of the terminal block and the housing decreases. The sealing member cannot adequately seal between the mounting surface of the terminal block and the housing. There is also a risk of refrigerant leaking from the opening in the mounting surface of the terminal block.

[0010] The object of the present disclosure is to integrate the flow path through which the refrigerant flows between the housing and the terminal block in a rotating electric machine having a resin terminal block attached to a housing that houses a stator, and to suppress leakage of the refrigerant between the housing and the terminal block. [Means for solving the problem]

[0011] A rotating electric machine according to the present disclosure comprises a housing that houses a stator and a terminal block attached to the housing, the housing being provided with a stator cooling flow path through which a coolant for cooling the stator flows, the terminal block having a resin structure made of resin, wiring held in the resin structure and electrically connected to the stator, and a reinforcing member made of metal, the resin structure having a mounting surface that is attached to the housing and a terminal block side flow path through which the coolant for cooling the wiring flows, the mounting surface having an opening that connects the stator cooling flow path and the terminal block side flow path, and a sealing portion that is provided around the opening and in which a sealing member is disposed, the reinforcing member being embedded in the resin structure and extending parallel to the mounting surface so as to face the sealing portion.

[0012] The rotating electric machine includes a housing that houses a stator and a terminal block attached to the housing. The terminal block has a resin structure made of resin.

[0013] The opening provided on the mounting surface of the resin structure of the terminal block communicates with a stator cooling flow path through which a refrigerant for cooling the stator in the housing flows, and a terminal block-side flow path through which a refrigerant for cooling the wiring in the resin structure of the terminal block flows. The flow paths through which the refrigerant flows (the stator cooling flow path and the terminal block-side flow path) can be integrated with the housing and the terminal block.

[0014] The gap between the mounting surface of the resin structure and the housing is sealed by a seal member disposed in a seal portion provided on the mounting surface of the resin structure.

[0015] When molding a resin structure, there is a risk that the sealing portion (where the sealing member is placed) provided on the mounting surface of the resin structure may be distorted by shrinkage cavities or the like. In this case, the adhesion between the mounting surface of the resin structure and the housing is reduced. The sealing member cannot adequately seal between the mounting surface of the resin structure and the housing. There is a risk that the refrigerant may leak from an opening provided on the mounting surface of the resin structure.

[0016] Therefore, a reinforcing member made of metal is embedded in the resin structure, and extends parallel to the mounting surface so as to face the sealing portion.

[0017] When molding the resin structure, the reinforcing member acts to press the sealing portion of the mounting surface in a direction perpendicular to the mounting surface. The sealing portion (where the sealing member is to be placed) provided on the mounting surface of the resin structure can be prevented from being distorted by shrinkage cavities or the like. The sealing member can provide a sufficient seal between the mounting surface of the resin structure and the housing. The refrigerant can be prevented from leaking from openings provided on the mounting surface of the resin structure.

[0018] As described above, in a rotating electric machine having a resin terminal block attached to a housing that houses a stator, the flow path through which the refrigerant flows is integrated between the housing and the terminal block, and leakage of the refrigerant between the housing and the terminal block can be suppressed.

[0019] In one embodiment, the terminal block side flow path and the wiring are arranged with a larger volume on the opposite side of the reinforcing member from the mounting surface than on the side of the reinforcing member from the mounting surface.

[0020] The configuration of the terminal block-side flow path and wiring is simpler on the side of the mounting surface relative to the reinforcing member than on the side opposite to the mounting surface relative to the reinforcing member, which is advantageous in suppressing distortion of the seal portion provided on the mounting surface of the resin structure of the terminal block.

[0021] In one embodiment, the resin structure has a thinner wall on the side of the mounting surface that faces the reinforcing member than on the side of the resin structure opposite to the mounting surface that faces the reinforcing member.

[0022] By thinning the side of the resin structure facing the mounting surface relative to the reinforcing member, it is advantageous in suppressing distortion of the seal portion provided on the mounting surface of the resin structure.

[0023] In one embodiment, the resin structure has a smaller variation in thickness on the side of the mounting surface relative to the reinforcing member than on the side of the resin structure opposite to the mounting surface relative to the reinforcing member.

[0024] By reducing the variation in thickness of the resin structure on the mounting surface side relative to the reinforcing member, it is advantageous to suppress distortion of the seal portion provided on the mounting surface of the resin structure.

[0025] In one embodiment, the mounting surface is provided with a first opening and a second opening as the opening, the first opening and the second opening are aligned along the mounting surface, the mounting surface of the resin structure is fastened to the housing by a first fastener and a second fastener, and the first fastener and the second fastener are arranged in a straight line along the mounting surface, sandwiching the first opening and the second opening.

[0026] Even if the fastening force of the first fastener and the second fastener is small, the adhesion force between the mounting surface of the resin structure and the housing can be increased, so that the space between the mounting surface of the resin structure and the housing can be sufficiently sealed by the sealing member.

[0027] In one embodiment, the resin structure holds a rotating electric machine side terminal composed of a plate-shaped bus bar as the wiring, and the rotating electric machine side terminal is connected to a power control device side terminal composed of a plate-shaped bus bar in the power control device by fastening it with a fastener.

[0028] The rotating electric machine side terminal and the power control device side terminal are both configured as plate-shaped bus bars and are fastened together with fasteners. Unlike when the rotating electric machine side terminal and the power control device side terminal are configured as wires, when vibration occurs in the rotating electric machine, the rotating electric machine side terminal and / or the power control device side terminal themselves will deform and the vibration load cannot be released.

[0029] The vibration load generated in the rotating electric machine may be applied to the mounting surface of the resin structure of the terminal block. In such a case, it is effective to embed a reinforcing member in the resin structure of the terminal block to suppress distortion of the seal provided on the mounting surface of the resin structure of the terminal block, thereby increasing the adhesion between the mounting surface of the resin structure of the terminal block and the housing, and the sealing performance of the seal member.

[0030] In one embodiment, the reinforcing member includes a plate-shaped plate portion extending parallel to the mounting surface so as to face the sealing portion, and a pair of protrusions protruding from both side edges of the plate portion toward the mounting surface, the pair of protrusions being arranged to sandwich the sealing portion in a direction along the mounting surface, and the resin structure having a bulge portion that bulges out relative to the mounting surface in a direction along the mounting surface.

[0031] Due to the presence of a bulge portion in the resin structure that bulges out relative to the mounting surface in a direction along the mounting surface, the seal portion provided on the mounting surface of the resin structure is likely to be dragged in the direction along the mounting surface and become distorted. The pair of protrusions on the reinforcing member are arranged to sandwich the seal portion in the direction along the mounting surface. The pair of protrusions on the reinforcing member function to press the seal portion in the direction along the mounting surface. Due to the presence of a bulge portion in the resin structure that bulges out relative to the mounting surface in a direction along the mounting surface, the seal portion provided on the mounting surface of the resin structure can be prevented from being dragged in the direction along the mounting surface and becoming distorted.

[0032] In one embodiment, the sealing portion is an O-ring groove provided on the mounting surface, and the sealing member is an O-ring disposed in the O-ring groove.

[0033] The O-ring placed in the O-ring groove provided on the mounting surface of the resin structure can provide a sufficient seal between the mounting surface of the resin structure and the housing.

[0034] In one embodiment, the rotating electric machine is mounted on a vehicle.

[0035] The reliability of a vehicle driven by a rotating electric machine can be improved. [Effects of the Invention]

[0036] According to the present disclosure, in a rotating electric machine having a resin terminal block attached to a housing that houses a stator, the flow path through which the refrigerant flows is integrated between the housing and the terminal block, and leakage of the refrigerant between the housing and the terminal block is suppressed. [Brief explanation of the drawings]

[0037] [Figure 1] FIG. 1 shows a vehicle. [Figure 2] FIG. 2 shows a plan view of the drive unit as seen from above. [Figure 3] FIG. 3 shows a front view of the drive unit. [Figure 4] Figure 4 shows the structure of the motor. [Figure 5] FIG. 5 shows the cooling structure of the motor. [Figure 6] FIG. 6 shows the current supply structure between the motor and the inverter. [Figure 7] FIG. 7 shows an enlarged view of the current-carrying structure between the motor and the inverter. [Figure 8] FIG. 8 is a perspective view of the motor-side terminal block as seen from above. [Figure 9] FIG. 9 is a perspective view of the motor-side terminal block as seen from below. [Figure 10] FIG. 10 shows an X-ray cross-sectional view of the motor-side terminal block. [Figure 11] FIG. 11 shows a cross section of the motor side terminal block taken along line XI. [Figure 12] FIG. 12 shows a perspective view of the reinforcing member. [Figure 13] FIG. 13 is a perspective view of the inverter-side terminal block as seen from above. [Figure 14] FIG. 14 is a perspective view of the inverter-side terminal block as seen from below. [Figure 15] FIG. 15 is a plan view showing the fixing surface of the motor block as viewed from above. DETAILED DESCRIPTION OF THE INVENTION

[0038] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the present disclosure, its applications, or its uses.

[0039] A rotating electric machine according to the present disclosure will be described. From a functional standpoint, the rotating electric machine is an electric motor, a generator, or a dynamomotor. The rotating electric machine is suitable as a driving source for a vehicle. The rotating electric machine mainly functions as an electric motor (motor), although it also functions as a generator during regeneration. In this example, the rotating electric machine will be described as a motor.

[0040] The front-rear direction, left-right direction, and up-down direction are based on the vehicle 1. In each figure, these directions are indicated by arrows. The front-rear direction corresponds to the direction of travel of the vehicle 1. The left-right direction corresponds to the width direction of the vehicle 1. The up-down direction corresponds to the height direction of the vehicle 1.

[0041] The direction in which the rotation axis J of the drive unit DU extends is called the axial direction. The direction perpendicular to the rotation axis J is called the radial direction. The outer side in the radial direction is called the outer circumferential side. The inner side in the radial direction is called the inner circumferential side. The rotation direction of the rotation axis J and the opposite direction are called the circumferential direction.

[0042] (vehicle) 1 shows a vehicle 1. The vehicle 1 is a so-called hybrid vehicle. The vehicle 1 includes a motor 2, an engine 3, a battery 4, a joint 5, a transmission 6, and an inverter 7.

[0043] The motor 2, engine 3, joint 5, and transmission 6 are assembled together to form a drive unit DU. The drive unit DU is mounted in the front compartment 1a of the vehicle 1. The drive unit DU drives and rotates the left and right front wheels 1b. The vehicle 1 is a so-called FF vehicle.

[0044] The drive unit DU is placed transversely on the vehicle 1 so that its rotation axis J extends in the vehicle width direction (left-right direction). The engine 3 is, for example, an in-line reciprocating engine. The type and performance of the engine 3 can be selected arbitrarily.

[0045] The battery 4 is mounted under the floor panel of the vehicle 1. The battery 4 has a high voltage and a large capacity, and functions as a power source for the motor 2.

[0046] The drive unit DU includes a motor 2 and an engine 3, as well as a joint 5 and a transmission 6. The motor 2 is electrically connected to a battery 4 via an inverter 7. The motor 2 is driven by the power input from the battery 4 under the control of the inverter 7.

[0047] When the vehicle 1 is driven by the motor 2, the inverter 7 converts the DC power of the battery 4 into three-phase AC power (U-phase, V-phase, and W-phase) consisting of different phases, and inputs the AC power to the motor 2. This causes the motor 2 to rotate.

[0048] During regeneration due to deceleration of the vehicle 1, the inverter 7 converts AC power generated by the motor 2 into DC power and outputs it to the battery 4.

[0049] (Drive unit) Fig. 2 shows a plan view of the drive unit DU as seen from above. Fig. 3 shows a front view of the drive unit DU as seen from the front (from the direction of line III). Fig. 4 shows the structure of the motor 2. As shown in Figs. 2 and 3, the drive unit DU is composed of the motor 2, engine 3, joint 5, and transmission 6, which are assembled together.

[0050] (Motor) The motor 2 includes a shaft 31, a rotor 32, a stator 33, a motor block 40, a motor housing 45, and a motor-side terminal block 50.

[0051] As shown in Fig. 4, the motor 2 is, for example, a three-phase permanent magnet synchronous motor. The shaft 31 extends in the axial direction. The rotor 32 is made of a cylindrical member including a permanent magnet. Although not shown, magnetic poles consisting of north and south poles are provided alternately on the outer periphery of the rotor 32. The shaft 31 and the rotor 32 are fixed coaxially with a rotation axis J as the center.

[0052] The stator 33 is made of a cylindrical member and is disposed coaxially with the rotor 32. An air gap is formed between the rotor 32 and the stator 33. Although not shown, the stator 33 includes a steel core and a group of three-phase coils consisting of U-phase, V-phase, and W-phase, each of which is formed by winding copper wire around the core.

[0053] 2 and 3, the motor block 40 is formed in a substantially rectangular parallelepiped block shape. More specifically, the motor block 40 is formed in a substantially square box shape, and a cavity is formed inside.

[0054] The motor housing 45 is a cylindrical metal container having a circular cross section and extending in the axial direction. The motor housing 45 is accommodated in the motor block 40.

[0055] 4, the shaft 31, rotor 32, and stator 33 are housed in a motor housing 45. The shaft 31 is rotatably supported by the motor housing 45. The shaft 31 extends horizontally in the vehicle width direction (left-right direction) so as to coincide with the rotation axis J.

[0056] 2 and 3, the right end of the shaft 31 is connected to the crankshaft of the engine 3 via a joint 5. The left end of the shaft 31 is connected to the transmission 6.

[0057] As shown in Figure 4, the outer peripheral surface of the stator 33 is in close contact with the inner peripheral surface of the motor housing 45. When the motor 2 is in operation, a large current flows through the stator 33. At that time, the stator 33 generates heat due to copper loss and iron loss. To cool the stator 33, the motor housing 45 is provided with a stator cooling channel 34. More specifically, the stator cooling channel 34 is formed between the inner peripheral surface of the motor housing 45 and the outer peripheral surface of the stator 33. The stator cooling channel 34 is a band-shaped channel through which the refrigerant C flows, and extends over a wide width around the entire circumference of the motor housing 45.

[0058] A mounting base 46 is disposed diagonally above the front of the motor housing 45 when viewed in the axial direction. The mounting base 46 has a flat mounting surface 47 that faces diagonally above and to the front. The mounting base 46 is formed in a rectangular shape extending tangentially to the motor housing 45. An inlet 47a and an outlet 47b are formed in the mounting surface 47. The inlet 47a and the outlet 47b are adjacent to each other in the circumferential direction. The inlet 47a and the outlet 47b communicate with the stator cooling passage 34. The mounting surface 47 is formed with two fastening holes 47c and two positioning holes 47d.

[0059] A partition wall 35 is provided in the stator cooling flow passage 34 at a position facing the mount 46. The partition wall 35 is disposed between the inlet 47a and the outlet 47b. The stator cooling flow passage 34 is divided by the partition wall 35. The refrigerant C introduced into the stator cooling flow passage 34 through the inlet 47a flows circumferentially through the stator cooling flow passage 34, and then is discharged to the outside through the outlet 47b.

[0060] The stator 33 is provided with three coil connection bus bars 36 corresponding to the U, V, and W phases. The coil connection bus bars 36 are ring-shaped or arc-shaped. The coil connection bus bars 36 are plate-shaped. The coil connection bus bars 36 are electrically connected to the coil groups of each phase in the stator 33. A connection piece 36a is provided on the coil connection bus bars 36 at a position facing the mounting base 46.

[0061] The motor side terminal block 50 is attached to the motor housing 45. The motor side terminal block 50 will be described later.

[0062] (inverter) The motor 2 is electrically connected to the battery 4 via an inverter 7. As shown in FIG. 2, the inverter 7 includes a DC side connector 61, a smoothing capacitor 62, a control board 63, an inverter case 70, and an inverter side terminal block 80.

[0063] 2, the DC side connector 61 includes a positive bus bar 61a and a negative bus bar 61b. The positive bus bar 61a and the negative bus bar 61b are connected to a control board 63 via a smoothing capacitor 62. The DC side connector 61 is electrically connected to the battery 4 via a cable 8. The smoothing capacitor 62 smoothes the power.

[0064] Power semiconductors such as IGBTs or MOSFETs are mounted on the control board 63. An inverter circuit is configured on the control board 63. The control board 63 controls the power input and output to and from the motor 2.

[0065] The inverter case 70 houses the DC side connector 61, the smoothing capacitor 62, and the control board 63. The inverter case 70 has a flat shape that is thin in the up-down direction and wide in the front-to-back and left-to-right directions. The inverter case 70 is fastened to and attached to the upper part of the drive unit DU so as to straddle the rotation shaft J.

[0066] The inverter-side terminal block 80 constitutes an AC-side connector. The inverter-side terminal block 80 holds three inverter-side bus bars 90 corresponding to the U, V, and W phases. The inverter-side bus bars 90 are plate-shaped. One end of the inverter-side bus bar 90 is connected to the control board 63. The other end of the inverter-side bus bar 90 is connected to a motor-side bus bar 100 in the motor-side terminal block 50, which will be described later.

[0067] The inverter 7 is electrically connected to the motor 2 via an inverter-side terminal block 80 and a motor-side terminal block 50. The power from the battery 4 is converted from direct current to alternating current by the inverter 7 and supplied to the motor 2.

[0068] The inverter-side terminal block 80 is disposed in the front portion of the upper surface of the motor block 40. The upper portion of the inverter-side terminal block 80 is located inside the inverter case 70, and the lower portion of the inverter-side terminal block 80 is located inside the motor block 40 (see FIG. 5). Details of the inverter-side terminal block 80 will be described later.

[0069] (Motor cooling structure) FIG. 5 is a cross-sectional view taken along line V of the cooling structure of the motor 2. The vehicle 1 is equipped with a circulation system for a refrigerant C. The circulation system is primarily intended to cool the engine 3. In this example, the refrigerant C also serves as cooling water for the engine. Note that the refrigerant C is not limited to water and may be oil or any other type of refrigerant.

[0070] The vehicle 1 includes a heat exchanger 20 and a water pump 21. The heat exchanger 20 is disposed at the front of the vehicle 1 and air-cools the refrigerant C. The water pump 21 is operated by the power or electric power of the drive unit DU. The refrigerant C cooled by the heat exchanger 20 is sent to the engine 3 and the inverter 7 by the water pump 21.

[0071] Although not shown, the inverter 7 is provided with a cooling passage for cooling the electrical components housed therein. The refrigerant C that has cooled the inverter 7 passes through a pipe 22 (see FIG. 2) and is introduced into a flow path connecting mechanism 15 provided in front of the drive unit DU. Although not shown, the flow path connecting mechanism 15 is made up of a connecting flow path, joint pipes, etc.

[0072] The refrigerant C introduced into the flow path connecting mechanism 15 is introduced into the stator cooling flow path 34 of the motor 2 via the motor-side terminal block 50. The stator cooling flow path 34 is provided between the stator 33 of the motor 2 and the motor housing 45. The refrigerant C introduced into the stator cooling flow path 34 circulates in the circumferential direction through the stator cooling flow path 34 and exchanges heat with the stator 33. The heat exchange between the refrigerant C and the stator 33 heats the refrigerant C and cools the stator 33. The refrigerant C that has circulated through the stator cooling flow path 34 is sent to the heat exchanger 20 via the flow path connecting mechanism 15. In the heat exchanger 20, the refrigerant C exchanges heat with the outside air and is cooled.

[0073] (Motor and inverter current flow structure) 6 is a cross-sectional view taken along line VI of the current supply structure between the motor 2 and the inverter 7. FIG. 7 is an enlarged view of the current supply structure between the motor 2 and the inverter 7.

[0074] As described above, the inverter-side terminal block 80 holds three inverter-side bus bars 90 corresponding to the U, V, and W phases, respectively. On the other hand, the motor-side terminal block 50 holds three motor-side bus bars 100 corresponding to the U, V, and W phases, respectively. The motor-side bus bars 100 are plate-shaped.

[0075] One end of the motor-side bus bar 100 in the motor-side terminal block 50 is connected to the other end of the inverter-side bus bar 90 in the inverter-side terminal block 80. The other end of the motor-side bus bar 100 in the motor-side terminal block 50 is connected to the coil connecting bus bar 36 in the stator 33. The motor-side bus bar 100 in the motor-side terminal block 50 and the inverter-side bus bar 90 in the inverter-side terminal block 80 are electrically connected to each other.

[0076] (Motor side terminal block) The motor side terminal block 50 will be described with reference to Figures 7 to 12. Figure 8 shows a perspective view of the motor side terminal block 50 as seen from above. Figure 9 shows a perspective view of the motor side terminal block 50 as seen from below. Figure 10 shows a cross-sectional view of the motor side terminal block 50 taken along line X. Figure 11 shows a cross-sectional view of the motor side terminal block 50 taken along line XI. Figure 12 shows a perspective view of the reinforcing member 150. For simplicity, the reinforcing member 150, which will be described later, is not shown in Figure 7.

[0077] The motor 2 is an example of a rotating electric machine. The motor 2 is mounted on the vehicle 1. The motor 2 includes a motor housing 45 and a motor-side terminal block 50. The motor housing 45 is an example of a housing. The motor-side terminal block 50 is an example of a terminal block.

[0078] As described above, the stator 33 is accommodated in the motor housing 45. The motor housing 45 is provided with the stator cooling passage 34. More specifically, the stator cooling passage 34 is formed between the inner circumferential surface of the motor housing 45 and the outer circumferential surface of the stator 33. A coolant C for cooling the stator 33 flows through the stator cooling passage 34.

[0079] The motor-side terminal block 50 is attached to the motor housing 45. The motor-side terminal block 50 is manufactured by injection molding (more specifically, mold forming) of resin. The motor-side terminal block 50 not only functions to relay the flow of power between the inverter 7 and the motor 2, but also functions to relay the flow of the refrigerant C between the flow path connecting mechanism 15 and the motor 2.

[0080] The motor-side terminal block 50 includes a resin structure 51, a motor-side bus bar 100, and a reinforcing member 150.

[0081] (resin structure) Resin structure 51 will be described with reference to FIGS. 8 to 10. Resin structure 51 is made of insulating resin. Resin structure 51 is formed by resin injection molding. Resin structure 51 is formed by molten insulating resin solidifying into a predetermined shape. Resin structure 51 has mounting portion 52, bulging portion 56, terminal block side flow path 57, and guide portion 58.

[0082] Mounting portion 52 is formed on the lower part of resin structure 51. Mounting portion 52 of resin structure 51 corresponds to mounting base 46 of motor housing 45. Mounting portion 52 of resin structure 51 has a mounting surface 53.

[0083] The resin structure 51 has a mounting surface 53 facing downward. The resin structure 51 is attached by being joined to the mounting surface 47 of the mounting base 46 of the motor housing 45.

[0084] The mounting surface 53 extends longitudinally in a direction inclined relative to the front-rear and up-down directions and laterally in the left-right direction. Hereinafter, the longitudinal direction of the direction along the mounting surface 53 will be referred to as the first direction D1. The shorter direction of the direction along the mounting surface 53 will be referred to as the second direction D2. The direction perpendicular to the mounting surface 53 will be referred to as the third direction D3. The first direction D1, the second direction D2, and the third direction D3 are perpendicular to each other. The mounting surface 53 is formed in a rectangular shape with the longer direction in the first direction D1 and the shorter direction in the second direction D2.

[0085] Mounting surface 53 of resin structure 51 is provided with outlet 53a, inlet 53b, two O-ring grooves 53c, two positioning protrusions 53d, a first fastening hole 53e, and a second fastening hole 53f. Outlet 53a and inlet 53b are examples of openings. Outlet 53a is an example of a first opening. Inlet 53b is an example of a second opening. O-ring groove 53c is an example of a sealing portion.

[0086] The outlet 53a and the inlet 53b open to the mounting surface 53 of the resin structure 51. The outlet 53a and the inlet 53b in the mounting surface 53 of the resin structure 51 correspond to the inlet 47a and the outlet 47b in the mounting surface 47 of the motor housing 45, and are connected to the stator cooling passage 34.

[0087] The outlet 53a and the inlet 53b are aligned along the mounting surface 53 of the resin structure 51 in the first direction D1.

[0088] Two O-ring grooves 53c are provided around the outlet port 53a and the inlet port 53b. The O-ring groove 53c goes around the outlet port 53a. The O-ring groove 53c goes around the inlet port 53b.

[0089] The O-ring groove 53c is for fitting an O-ring 54. The O-ring 54 is an example of a sealing member. The O-ring 54 is placed in the O-ring groove 53c. The O-ring 54 is intended to prevent liquid leakage. The O-ring 54 is a surface seal provided in a planar shape so as to fit along the mounting surface 53. The O-ring 54 is made of, for example, rubber as an elastic body.

[0090] Two positioning protrusions 53 d on the mounting surface 53 of the resin structure 51 of the motor-side terminal block 50 correspond to two positioning holes 47 d on the mounting surface 47 of the motor housing 45 .

[0091] A pair of flanges 55 protruding outward in the first direction D1 are provided at both ends of the lower part of the resin structure 51 in the first direction D1. The flanges 55 are formed in a plate shape with the thickness direction of the flanges 55 aligned in the third direction D3. One surface of the flanges 55 on the third direction D3 side is exposed. The other surface of the flanges 55 on the third direction D3 side constitutes both ends of the mounting surface 53 in the first direction D1.

[0092] The first fastening hole 53e and the second fastening hole 53f are arranged on the mounting surface 53 (the surface on the other side in the third direction D3) of the flange portion 55. The first fastening hole 53e and the second fastening hole 53f on the mounting surface 53 of the flange portion 55 of the resin structure 51 correspond to the two fastening holes 47c on the mounting surface 47 of the motor housing 45.

[0093] The first fastening hole 53e and the second fastening hole 53f penetrate the flange portion 55 in the third direction D3. A first fastening tool 141 is inserted through the first fastening hole 53e. A second fastening tool 142 is inserted through the second fastening hole 53f. The first fastening tool 141 and the second fastening tool 142 are, for example, bolts.

[0094] The mounting surface 53 of the resin structure 51 of the motor-side terminal block 50 is fastened to the mounting surface 47 of the motor housing 45 by a first fastener 141 and a second fastener 142 .

[0095] The first fastener 141 (first fastening hole 53e) and the second fastener 142 (second fastening hole 53f) are arranged in a straight line in the first direction D1 along the mounting surface 53, sandwiching the outlet 53a and the inlet 53b.

[0096] Specifically, from one side to the other in the first direction D1, the first fastener 141 (first fastening hole 53e), the outlet 53a, the inlet 53b, and the second fastener 142 (second fastening hole 53f) are arranged in a straight line in this order.

[0097] Bulging portion 56 is formed at one end in second direction D2, which is the right end of resin structure 51. In resin structure 51, bulging portion 56 bulges out relative to mounting surface 53 of mounting portion 52 in one direction along mounting surface 53 in second direction D2.

[0098] The bulging portion 56 of the resin structure 51 is connected to the flow path connecting mechanism 15. An inlet 56a and an outlet 56b are opened in the bulging portion 56 of the resin structure 51. The inlet 56a and the outlet 56b in the bulging portion 56 of the resin structure 51 of the motor-side terminal block 50 are connected to the flow path connecting mechanism 15. The refrigerant C flows from the flow path connecting mechanism 15 to the motor-side terminal block 50 through the inlet 56a. The refrigerant C flows from the motor-side terminal block 50 to the flow path connecting mechanism 15 through the outlet 56b.

[0099] Terminal block side flow path 57 is formed as a cavity provided inside resin structure 51. Refrigerant C flows through terminal block side flow path 57.

[0100] The terminal block side flow path 57 includes a first terminal block side flow path 57a and a second terminal block side flow path 57b. The first terminal block side flow path 57a includes an inlet 56a and an outlet 53a. The second terminal block side flow path 57b includes an outlet 56b and an inlet 53b.

[0101] The refrigerant C flows from the flow path connecting mechanism 15 through the first terminal block side flow path 57a of the motor side terminal block 50 to the stator cooling flow path 34. The refrigerant C flows from the stator cooling flow path 34 through the second terminal block side flow path 57b of the motor side terminal block 50 to the flow path connecting mechanism 15.

[0102] The first terminal block side flow path 57a starts from the inlet 56a, extends in the second direction D2, then bends in the third direction D3, extends toward the mounting surface 53, and reaches the outlet 53a. The second terminal block side flow path 57b starts from the outlet 56b, extends in the second direction D2, then bends in the third direction D3, extends toward the mounting surface 53, and reaches the inlet 53b.

[0103] The outlet 53a and the inlet 53b provided on the mounting surface 53 of the resin structure 51 connect the stator cooling passage 34 and the terminal block side passage 57 (the first terminal block side passage 57a and the second terminal block side passage 57b).

[0104] Guide portion 58 is provided on the upper part of resin structure 51. Guide portion 58 is formed in a substantially square pillar shape. Guide portion 58 extends in the up-down direction. When viewed in the up-down direction, guide portion 58 is configured so that its length is in the left-right direction and its width is in the front-to-rear direction. The upper end of guide portion 58 forms the upper end of resin structure 51 of motor-side terminal block 50. A guide surface 58a is provided at the upper end of guide portion 58 of motor-side terminal block 50, which is inclined so as to extend forward or backward as it extends upward.

[0105] (Motor side bus bar) The motor side bus bar 100 will be described with reference to Figures 8 to 10. As described above, there are three motor side bus bars 100, one for each of the U phase, V phase, and W phase. The motor side bus bar 100 is an example of wiring. The motor side bus bar 100 is plate-shaped.

[0106] The motor side bus bar 100 is held by the resin structure 51 of the motor side terminal block 50. The motor side bus bar 100 is embedded in the resin structure 51. The motor side bus bar 100 is made of metal. Adjacent motor side bus bars 100 are insulated from each other by the resin structure 51.

[0107] The motor-side bus bar 100 of the motor-side terminal block 50 is electrically connected to the stator 33 of the motor housing 45 via the coil connecting bus bar 36 .

[0108] The guide portion 58 of the resin structure 51 of the motor-side terminal block 50 holds the three motor-side bus bars 100 so that they are aligned in the left-right direction and extend in the up-down direction. The guide portion 58 covers the upper end of the motor-side bus bars 100 from the rear, left, and right sides. The guide portion 58 does not cover the upper end of the motor-side bus bars 100 from the front. The upper end of the motor-side bus bars 100 forms motor-side terminals 101 exposed forward in the guide portion 58 of the resin structure 51 of the motor-side terminal block 50.

[0109] The motor-side terminal 101 is an example of a rotating electric machine-side terminal. The motor-side terminal 101 is formed at the upper end of a plate-shaped motor-side bus bar 100. The guide portion 58 of the resin structure 51 of the motor-side terminal block 50 holds the motor-side terminal 101. The motor-side terminal 101 extends upward toward an insertion portion 84 of the inverter-side terminal block 80, which will be described later.

[0110] The motor-side bus bars 100 and the terminal-block-side flow paths 57 are arranged alternately in the first direction D1. Specifically, from one side to the other in the first direction D1, the motor-side bus bars 100, the first terminal-block-side flow paths 57a, the motor-side bus bars 100, the second terminal-block-side flow paths 57b, and the motor-side bus bars 100 are arranged alternately in this order. The refrigerant C flowing through the terminal-block-side flow paths 57 is intended to cool the motor-side bus bars 100.

[0111] (reinforcing member) The reinforcing member 150 will be described with reference to Figures 10 to 12. The reinforcing member 150 is made of metal. The reinforcing member 150 is embedded inside the resin structure 51.

[0112] The reinforcing member 150 includes a plate portion 151 and a pair of protrusions 154. The plate portion 151 is formed in a plate shape with its thickness direction aligned with the third direction D3. When viewed in the third direction D3, the plate portion 151 is formed in a rectangular shape with its long sides aligned with the first direction D1 and its short sides aligned with the second direction D2.

[0113] The plate portion 151 of the reinforcing member 150 extends parallel (more specifically, geometrically parallel) to the mounting surface 53 of the resin structure 51 so as to face the O-ring groove 53c. The plate portion 151 of the reinforcing member 150 is disposed so as to overlap the O-ring groove 53c when viewed in the third direction D3. The plate portion 151 of the reinforcing member 150 covers the O-ring groove 53c in the third direction D3.

[0114] Two flow path through holes 152 and two fastener through holes 153 are provided in the plate portion 151 of the reinforcing member 150. The flow path through holes 152 and the fastener through holes 153 penetrate the plate portion 151 in the third direction D3. The flow path through holes 152 and the fastener through holes 153 are arranged in a straight line in the first direction D1.

[0115] One flow path through-hole 152 passes through the first terminal block side flow path 57a and faces the outlet 53a. The other flow path through-hole 152 passes through the second terminal block side flow path 57b and faces the inlet 53b. One fastener through-hole 153 passes through the first fastener 141 and faces the first fastening hole 53e. The other fastener through-hole 153 passes through the second fastener 142 and faces the second fastening hole 53f.

[0116] The pair of protrusions 154 protrude in the third direction D3 from edge portions 151a on both sides of the plate portion 151 in the second direction D2 toward the mounting surface 53 of the resin structure 51. The pair of protrusions 154 face each other in the second direction D2.

[0117] The pair of protrusions 154 are arranged to sandwich the O-ring groove 53c in the second direction D2 along the mounting surface 53. The protrusions 154 are arranged outward in the second direction D2 from the O-ring groove 53c. The protrusions 154 face the O-ring 54 arranged in the O-ring groove 53c in the second direction D2.

[0118] As described above, in resin structure 51, bulging portion 56 bulges out relative to mounting surface 53 of mounting portion 52 in one of the second directions D2 along mounting surface 53. That is, in resin structure 51, bulging portion 56 bulges out relative to mounting surface 53 of mounting portion 52 in second direction D2 in which the pair of protrusions 154 face each other.

[0119] In the resin structure 51, the terminal block side flow path 57 (first terminal block side flow path 57a and second terminal block side flow path 57b) and the three motor side bus bars 100 are arranged with a larger volume on the opposite side of the mounting surface 53 in the third direction D3 with respect to the plate portion 151 of the reinforcing member 150 than on the side of the mounting surface 53 in the third direction D3 with respect to the plate portion 151 of the reinforcing member 150.

[0120] In other words, the sum of the volume of the terminal block side flow path 57 arranged on the opposite side of the mounting surface 53 in the third direction D3 relative to the plate portion 151 of the reinforcing member 150 and the volume of the motor side bus bar 100 is greater than the sum of the volume of the terminal block side flow path 57 arranged on the side of the mounting surface 53 in the third direction D3 relative to the plate portion 151 of the reinforcing member 150 and the volume of the motor side bus bar 100.

[0121] The side of the resin structure 51 facing the mounting surface 53 in the third direction D3 relative to the plate portion 151 of the reinforcing member 150 is thinner than the side of the resin structure 51 facing the mounting surface 53 in the third direction D3 relative to the plate portion 151 of the reinforcing member 150.

[0122] In other words, the thickness Ta of the resin structure 51 on the side of the mounting surface 53 in the third direction D3 relative to the plate portion 151 of the reinforcing member 150 is smaller than the thickness Tb of the resin structure 51 on the side opposite the mounting surface 53 in the third direction D3 relative to the plate portion 151 of the reinforcing member 150.

[0123] The thicknesses Ta and Tb are the thicknesses of resin structure 51 in third direction D3 perpendicular to mounting surface 53.

[0124] The side of the mounting surface 53 in the third direction D3 relative to the plate portion 151 of the reinforcing member 150 in the resin structure 51 has smaller variation in thickness than the side of the plate portion 151 of the reinforcing member 150 opposite to the mounting surface 53 in the third direction D3 in the resin structure 51.

[0125] In other words, the variation in thickness Ta on the side of the mounting surface 53 in the third direction D3 relative to the plate portion 151 of the reinforcing member 150 in the resin structure 51 is smaller than the variation in thickness Tb on the side opposite the mounting surface 53 in the third direction D3 relative to the plate portion 151 of the reinforcing member 150 in the resin structure 51.

[0126] The variations in thickness Ta and Tb are variations in thickness in third direction D3 perpendicular to mounting surface 53 of resin structure 51, and variations in thickness in first direction D1 and second direction D2 along mounting surface 53 of resin structure 51.

[0127] (Inverter side terminal block) The inverter-side terminal block 80 will be described with reference to Figures 7, 13, and 14. Figure 13 is a perspective view of the inverter-side terminal block 80 as seen from above. Figure 14 is a perspective view of the inverter-side terminal block 80 as seen from below.

[0128] The inverter 7 includes an inverter-side terminal block 80. The inverter 7 is an example of a power control device. The inverter-side terminal block 80 is made of resin. The inverter-side terminal block 80 is formed by injection molding (more specifically, mold forming).

[0129] The inverter-side terminal block 80 includes a fixed portion 81, an insertion portion 84, and a separate portion 87. Furthermore, the fixed portion 81 includes a base portion 82 and a vertically extending portion 83. The base portion 82 is plate-shaped with its thickness direction in the up-down direction, and extends longitudinally in the left-right direction and transversely in the front-rear direction. The vertically extending portion 83 is provided at the front end portion on the upper surface of the base portion 82. The vertically extending portion 83 is formed in the shape of a substantially square pillar extending in the up-down direction. When viewed in the up-down direction, the vertically extending portion 83 is configured to extend longitudinally in the left-right direction and transversely in the front-rear direction.

[0130] The portion of the base portion 82 that projects rearward from the lower end of the vertically extending portion 83 constitutes a flange 82a. The flange 82a is located rearward of the vertically extending portion 83. Two through holes 82b are provided in the flange 82a. The through holes 82b pass through the flange 82a in the up-down direction. The two through holes 82b are arranged side by side with a gap between them in the left-right direction. A fixing device 110, which will be described later, is passed through the through holes 82b in the up-down direction.

[0131] The insertion portion 84 is provided at a position facing the vertically extending portion 83 on the underside of the base portion 82 of the fixed portion 81. The insertion portion 84 is formed in a substantially square pillar shape. The insertion portion 84 extends in the vertical direction. When viewed in the vertical direction, the insertion portion 84 is configured so that its longer side is in the left-right direction and its shorter side is in the front-to-rear direction. The insertion portion 84 extends downward from the fixed portion 81 toward the motor-side terminal block 50.

[0132] A step portion 85 is provided on an outer peripheral surface 84a of the insertion portion 84. The outer peripheral surface 84a faces in the front-rear and left-right directions. On the outer peripheral surface 84a of the insertion portion 84, the step portion 85 has a larger diameter on the upper side and a smaller diameter on the lower side.

[0133] The separate part 87 is configured as a separate part from the insertion part 84. The separate part 87 is formed in a roughly square tubular shape. The separate part 87 extends in the up-down direction. When viewed in the up-down direction, the separate part 87 is configured to be long in the left-right direction and short in the front-to-rear direction. The separate part 87 fits into the outer peripheral surface 84a of the insertion part 84 from below. The separate part 87 forms the lower end part of the inverter side terminal block 80.

[0134] The step portion 85 on the outer peripheral surface 84a of the insertion portion 84 and the separate portion 87 form a groove portion 89. An O-ring 120, which will be described later, is disposed in the groove portion 89. The groove portion 89 is configured in the shape of a groove that extends in the left-right direction and the front-rear direction and goes around the circumference.

[0135] The inverter-side terminal block 80 holds three inverter-side bus bars 90 corresponding to the U, V, and W phases. The three inverter-side bus bars 90 are arranged side by side in the left-right direction. The inverter-side bus bars 90 are made of metal. Adjacent inverter-side bus bars 90 are insulated from each other by resin.

[0136] The inverter-side bus bar 90 is bent in an inverted L shape. After extending rearward, the inverter-side bus bar 90 bends and extends downward. The lower end of the inverter-side bus bar 90 forms an inverter-side terminal 91 that protrudes downward beyond the lower end of the inverter-side terminal block 80 (the lower end of the separate portion 87).

[0137] The inverter-side terminal 91 is an example of a power control device-side terminal. The inverter-side terminal 91 is formed at the lower end of a plate-shaped inverter-side bus bar 90. The insertion portion 84 of the inverter-side terminal block 80 holds the inverter-side terminal 91. The inverter-side terminal 91 extends downward toward the motor-side terminal block 50. More specifically, the inverter-side terminal 91 protrudes downward from the insertion portion 84 of the inverter-side terminal block 80 toward the motor-side terminal block 50.

[0138] (Fixing the inverter terminal block to the motor block) Fixing of the inverter-side terminal block 80 to the motor block 40 will be described with reference to Figures 7 and 15. Figure 15 shows a plan view of the fixing surface 41a of the motor block 40 as viewed from above.

[0139] The inverter-side terminal block 80 is fixed to the motor block 40 of the motor 2. As described above, the motor block 40 is substantially rectangular box-shaped and has a cavity formed therein. The motor block 40 accommodates a motor housing 45 (which accommodates the shaft 31, rotor 32, and stator 33).

[0140] A fixing surface 41a is provided on the upper wall portion 41 of the motor block 40. The upper wall portion 41 is plate-shaped and has a thickness in the up-down direction. The upper wall portion 41 extends in the front-rear and left-right directions. The fixing surface 41a faces upward.

[0141] The fixing surface 41a of the upper wall portion 41 of the motor block 40 is provided with an insertion hole 42, two fixing holes 43, and a lightening hole 44. The insertion hole 42 penetrates the upper wall portion 41 in the up-down direction. When viewed in the up-down direction, the insertion hole 42 is configured so that its length is in the left-right direction and its width is in the front-rear direction.

[0142] The two fixing holes 43 are arranged side by side at a distance in the left-right direction behind the insertion hole 42. The fixing holes 43 are, for example, bolt holes, and correspond to the fixing tool 110 described below.

[0143] The lightening portions 44 are provided around the insertion holes 42 on the fixing surface 41a of the motor block 40. The lightening portions 44 are arranged on the front and rear sides of the insertion holes 42. The lightening portions 44 are formed as recesses that are recessed downward relative to the fixing surface 41a.

[0144] The flange 82 a of the fixed portion 81 of the inverter-side terminal block 80 is fixed to the fixing surface 41 a of the motor block 40 of the motor 2 by a fixing tool 110 .

[0145] The fixing device 110 is, for example, a bolt. The fixing device 110 passes through the through-hole 82b of the flange 82a of the fixed portion 81 in the vertical direction, and is bolted to the fixing hole 43 in the fixing surface 41a.

[0146] (Insertion of the insertion part into the insertion hole) The insertion of the insertion portion 84 of the inverter-side terminal block 80 into the insertion hole 42 of the motor block 40 will be described with reference to Figure 7. The insertion portion 84 of the inverter-side terminal block 80 is inserted into the insertion hole 42 provided in the fixing surface 41a of the motor block 40. The insertion direction of the insertion portion 84 is the vertical direction. The lower end of the insertion portion 84 protrudes slightly downward from the back surface 41b of the upper wall portion 41 of the motor block 40 (the surface facing downward, opposite the fixing surface 41a).

[0147] An O-ring 120 is provided in the gap E between the outer peripheral surface 84a of the insertion portion 84 of the inverter-side terminal block 80 and the inner peripheral surface 42a of the insertion hole 42 of the motor block 40. The O-ring 120 is made of an elastic body. The O-ring 120 is made of rubber, for example. The O-ring 120 prevents leakage of oil and the like from the inside of the motor block 40 to the outside of the motor block 40. The O-ring 120 is arranged so as to surround the outer peripheral surface 84a of the insertion portion 84, which serves as a shaft, around the shaft. The O-ring 120 forms a shaft seal.

[0148] The step portion 85 on the outer circumferential surface 84a of the insertion portion 84 and the separate portion 87 form a groove portion 89. The groove portion 89 faces the inner circumferential surface 42a of the insertion hole 42. An O-ring 120 is disposed in the groove portion 89.

[0149] (Connection between motor terminals and inverter terminals) The connection between the motor-side terminal 101 and the inverter-side terminal 91 will be described with reference to Figures 7, 8, and 13. The motor-side terminal 101 is plate-shaped with its thickness in the front-to-rear direction. The front surface of the motor-side terminal 101 is the motor-side connection surface 101a. The motor-side connection surface 101a faces forward. The motor-side terminal 101 is provided with a motor-side fastening hole 102 that penetrates in the front-to-rear direction.

[0150] The inverter-side terminal 91 is plate-shaped with its thickness extending in the front-rear direction. The rear surface of the inverter-side terminal 91 serves as an inverter-side connection surface 91a. The inverter-side connection surface 91a faces rearward. The inverter-side terminal 91 is provided with an inverter-side fastening hole 92 that penetrates in the front-rear direction.

[0151] The motor-side connection surface 101a of the motor-side terminal 101 and the inverter-side connection surface 91a of the inverter-side terminal 91 extend parallel to each other in the insertion direction (vertical direction) and overlap each other.

[0152] The motor-side terminal 101 and the inverter-side terminal 91 are connected to each other by fastening them with a fastener 130. The fastening direction by the fastener 130 is the front-rear direction. The fastener 130 is, for example, a bolt.

[0153] (Action and effect) The motor 2 includes a motor housing 45 that houses the stator 33, and a motor-side terminal block 50 attached to the motor housing 45. The motor-side terminal block 50 has a resin structure 51 made of resin.

[0154] An outlet 53a and an inlet 53b provided on the mounting surface 53 of the resin structure 51 of the motor-side terminal block 50 communicate with a stator cooling flow path 34, through which the refrigerant C flows to cool the stator 33 in the motor housing 45, and a terminal block-side flow path 57 (a first terminal block-side flow path 57a and a second terminal block-side flow path 57b), through which the refrigerant C flows to cool the motor-side bus bar 100 in the resin structure 51 of the motor-side terminal block 50. The flow paths (the stator cooling flow path 34 and the terminal block-side flow path 57) through which the refrigerant C flows can be integrated with the motor housing 45 and the motor-side terminal block 50.

[0155] The gap between mounting surface 53 of resin structure 51 and mounting surface 47 of motor housing 45 is sealed by an O-ring 54 disposed in an O-ring groove 53 c provided in mounting surface 53 of resin structure 51 .

[0156] When resin structure 51 is molded, O-ring groove 53c (for receiving O-ring 54) provided on mounting surface 53 of resin structure 51 may shrink and become distorted due to shrinkage cavities or the like. In this case, the adhesion between mounting surface 53 of resin structure 51 and mounting surface 47 of motor housing 45 decreases. O-ring 54 cannot adequately seal between mounting surface 53 of resin structure 51 and mounting surface 47 of motor housing 45. There is a risk of refrigerant C leaking from outlet 53a and inlet 53b provided on mounting surface 53 of resin structure 51.

[0157] Therefore, a reinforcing member 150 made of metal is embedded inside resin structure 51. Reinforcing member 150 extends parallel to mounting surface 53 of resin structure 51 so as to face O-ring groove 53c.

[0158] When resin structure 51 is molded, reinforcing member 150 acts to press O-ring groove 53 c provided in mounting surface 53 in a direction perpendicular to mounting surface 53 .

[0159] This can prevent O-ring groove 53c (for receiving O-ring 54) provided on mounting surface 53 of resin structure 51 from being distorted by shrinkage cavities or the like. O-ring 54 can provide a sufficient seal between mounting surface 53 of resin structure 51 and mounting surface 47 of motor housing 45. This can prevent refrigerant C from leaking from outlet 53a and inlet 53b provided on mounting surface 53 of resin structure 51.

[0160] As described above, in the motor 2 having a resin motor side terminal block 50 attached to the motor housing 45 that houses the stator 33, the flow paths through which the refrigerant C flows (the stator cooling flow path 34 and the terminal block side flow path 57) are integrated between the motor housing 45 and the motor side terminal block 50, and leakage of the refrigerant C between the motor side terminal block 50 and the motor housing 45 can be suppressed.

[0161] The configurations of terminal block-side flow path 57 and motor-side bus bar 100 are simpler on the side of mounting surface 53 of reinforcing member 150 than on the side opposite mounting surface 53 of reinforcing member 150. This is advantageous in suppressing distortion of O-ring groove 53c provided on mounting surface 53 of resin structure 51 of motor-side terminal block 50.

[0162] By making the mounting surface 53 side of the resin structure 51 thinner (reducing the thickness Ta) than the reinforcing member 150, it is advantageous in suppressing distortion of the O-ring groove 53c provided on the mounting surface 53 of the resin structure 51.

[0163] Reducing the variation in thickness Ta of resin structure 51 on the mounting surface 53 side relative to reinforcing member 150 is advantageous in suppressing distortion of O-ring groove 53c provided on mounting surface 53 of resin structure 51.

[0164] Even if the fastening force of the first fastener 141 and the second fastener 142 is small, the adhesion force between the mounting surface 53 of the resin structure 51 and the mounting surface 47 of the motor housing 45 can be increased, so that the O-ring 54 can adequately seal between the mounting surface 53 of the resin structure 51 and the mounting surface 47 of the motor housing 45.

[0165] The motor-side terminal 101 and the inverter-side terminal 91 are both configured as plate-shaped bus bars (motor-side bus bar 100 and inverter-side bus bar 90), and are fastened together with fasteners 130. Unlike when the motor-side terminal 101 and the inverter-side terminal 91 are configured as wires, when vibration occurs in the motor 2, the vibration load cannot be released due to deformation of the motor-side terminal 101 and / or the inverter-side terminal 91 themselves.

[0166] Vibration loads generated in motor 2 may be applied to mounting surface 53 of resin structure 51 of motor-side terminal block 50. In such cases, it is effective to embed reinforcing member 150 in resin structure 51 of motor-side terminal block 50 to suppress distortion of O-ring groove 53c provided on mounting surface 53 of resin structure 51 of motor-side terminal block 50, thereby increasing the adhesion between mounting surface 53 of resin structure 51 of motor-side terminal block 50 and mounting surface 47 of motor housing 45, and the sealing performance provided by O-ring 54.

[0167] Due to the presence of the bulge portion 56 that bulges in the second direction D2 along the mounting surface 53 relative to the mounting surface 53 of the resin structure 51, the O-ring groove 53c provided on the mounting surface 53 of the resin structure 51 is likely to be dragged in the second direction D2 along the mounting surface 53 and become distorted.

[0168] The pair of protrusions 154 of the reinforcing member 150 are arranged to sandwich the O-ring groove 53c provided on the mounting surface 53 in the second direction D2 along the mounting surface 53. The pair of protrusions 154 of the reinforcing member 150 act to press the O-ring groove 53c in the second direction D2 along the mounting surface 53. Due to the presence of the bulging portion 56 of the resin structure 51 that bulges out relative to the mounting surface 53 in the second direction D2 along the mounting surface 53, it is possible to prevent the O-ring groove 53c provided on the mounting surface 53 of the resin structure 51 from being dragged in the second direction D2 along the mounting surface 53 and becoming distorted.

[0169] O-ring 54 placed in O-ring groove 53c provided on mounting surface 53 of resin structure 51 can provide a sufficient seal between mounting surface 53 of resin structure 51 and mounting surface 47 of motor housing 45.

[0170] The reliability of the vehicle 1 driven by the motor 2 can be improved.

[0171] (Other embodiments) Although the present disclosure has been described above with reference to preferred embodiments, such description is not limiting, and it goes without saying that various modifications, substitutions, or combinations are possible.

[0172] The housing may be a motor block 40 instead of a motor housing 45 .

[0173] Instead of the motor-side bus bar 100, for example, a flexible wire may be used as the wiring.

[0174] The sealing member is not limited to the O-ring 54, and may be, for example, a sheet gasket. In this case, the sealing portion may not be the O-ring groove 53c, but may be, for example, a region for disposing the sheet gasket.

[0175] The reinforcing member 150 may not have the protrusion 154 and may be composed of only the plate portion 151. The reinforcing member 150 does not have to be plate-shaped. The reinforcing member 150 does not necessarily have to extend completely parallel to the mounting surface 53, and may intersect at a slight angle. The reinforcing member 150 may have any configuration as long as it extends parallel (not limited to completely geometrically parallel) to the mounting surface 53 so as to face the sealing portion.

[0176] 10 , a cylindrical spacer 155 capable of transmitting a fastening force between the reinforcing member 150 and the mounting base 46 of the motor housing 45 is integrally molded between the fastener through-hole 153 of the reinforcing member 150 and the mounting surface 53 of the resin structure 51. Alternatively, a separate spacer 155 is provided integrally with the resin structure 51 between the fastener through-hole 153 and the mounting surface 53. The reinforcing member 150 may be firmly attached to the mounting base 46 of the motor housing 45 with a strong tightening torque, regardless of the strength of the resin constituting the resin structure 51.

[0177] The rotating electric machine does not have to be applied to the vehicle 1. [Industrial Applicability]

[0178] The present disclosure is applicable to rotating electrical machines and is therefore extremely useful and has high industrial applicability. [Explanation of symbols]

[0179] D1 1st direction D2 2nd direction D3 Third direction Thickness Tb wall thickness E Gap DU Drive Unit J rotation axis C Refrigerant 1 vehicle 1a Antechamber 1b front wheel 2 Motor (rotating electric machine) 3 Engine 4 Battery 5 Joint 6. Transmission 7. Inverter (power control device) 8 Cable 15 Flow path connection mechanism 20 Heat exchanger 21 Water pump 22 Piping 31 Shaft 32 rotor 33 Stator 34 Stator cooling channel 35 Partition Wall 36 Coil-connected busbar 36a Connecting piece 40 Motor block (housing) 41 Upper wall 41a Fixed surface 41b back side 42 Insertion hole 42a Inner surface 43 Fixing hole 44 Cutout 45 Motor housing (enclosure) 46 Mounting base 47 Mounting surface 47a entrance 47b Outlet 47c Fastening hole 47d Positioning hole 50 Motor side terminal block (terminal block) 51 Resin structure 52 Mounting part 53 Mounting surface 53a Outlet (first opening, opening) 53b Inlet (second opening, opening) 53c O-ring groove (sealing part) 53d Positioning protrusion 53e First fastening hole 53f Second fastening hole 54 O-ring (sealing material) 55 flange 56 Bulge 56a Inlet 56b Outlet 57 Terminal block side flow path 57a 1st terminal block side flow path 57b 2nd terminal block side flow path 58 Guide section 61 DC side connector 61a Positive busbar 61b Negative bus bar 62 Smoothing capacitor 63 Control board 70 Inverter case 80 Inverter side terminal block 81 Fixed part 82 Base 82a flange 82b Through hole 83 Vertical extension 84 Insertion section 84a Outer surface 85 Step 87 Separate body 89 Groove 90 Inverter side bus bar (bus bar) 91 Inverter side terminal (power control device side terminal) 91a Inverter side connection surface 92 Inverter side fastening hole 100 Motor side bus bar (bus bar, wiring) 101 Motor side terminal (rotating electric machine side terminal) 101a Motor side connection surface 102 Motor side fastening hole 110 Fixtures 120 O-rings 130 Fasteners 141 First fastener 142 Second fastener 150 Reinforcement member 151 Board part 151a Edge 152 Flow passage hole 153 Fastener Through Hole 154 Protrusion 155 Spacer

Claims

1. a housing that houses a stator; a terminal block attached to the housing, The housing is provided with a stator cooling flow path through which a coolant for cooling the stator flows, The terminal block is a resin structure made of resin; a wiring held by the resin structure and electrically connected to the stator; a reinforcing member made of metal, The resin structure is a mounting surface that is attached to the housing; a terminal block side flow path through which the refrigerant for cooling the wiring flows, The mounting surface has: an opening communicating the stator cooling passage with the terminal block side passage; a seal portion provided around the opening and in which a seal member is disposed; the reinforcing member is embedded in the resin structure, The reinforcing member extends parallel to the mounting surface so as to face the seal portion.

2. The rotating electric machine according to claim 1 , wherein the terminal block side flow path and the wiring are arranged with a larger volume on the opposite side of the reinforcing member from the mounting surface than on the side of the reinforcing member from the mounting surface.

3. 3. The rotating electric machine according to claim 1, wherein the resin structure has a thinner wall on a side of the resin structure facing the reinforcing member toward the mounting surface than on a side of the resin structure facing the reinforcing member away from the mounting surface.

4. 3. The rotating electric machine according to claim 1, wherein the resin structure has a smaller variation in thickness on the side of the reinforcing member facing the mounting surface than on the side of the resin structure opposite the mounting surface facing the reinforcing member.

5. The mounting surface is provided with a first opening as the opening and a second opening as the opening, the first opening and the second opening are aligned along the mounting surface, the mounting surface of the resin structure is fastened to the housing by a first fastener and a second fastener; 3. The rotating electric machine according to claim 1, wherein the first fastener and the second fastener are arranged in a straight line along the mounting surface, sandwiching the first opening and the second opening.

6. the resin structure holds a rotating electric machine side terminal configured as a plate-shaped bus bar serving as the wiring, 3. The rotating electric machine according to claim 1, wherein the rotating electric machine side terminals are connected to a power control device side terminal formed of a plate-shaped bus bar in the power control device by fastening with a fastener.

7. The reinforcing member includes a plate-shaped plate portion extending parallel to the mounting surface so as to face the sealing portion; a pair of protrusions protruding from both edge portions of the plate portion toward the mounting surface, The pair of protruding portions are arranged to sandwich the seal portion in a direction along the mounting surface, The rotating electric machine according to claim 1 or 2, wherein the resin structure has a bulging portion that bulges out from the mounting surface in a direction along the mounting surface.

8. the sealing portion is an O-ring groove provided on the mounting surface, 3. The rotating electric machine according to claim 1, wherein the sealing member is an O-ring disposed in the O-ring groove.

9. The rotating electric machine according to claim 1 or 2, which is mounted on a vehicle.

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