Support structure of the drive unit

Abstract

To provide a drive unit support structure that can suppress impact on the front wall of the case body during a rear-end collision of a vehicle, thereby protecting the motor generator and power control device from impact. [Solution] The support structure of the drive device 5 is such that the lid portion 22 of the drive case 8 has a front flange portion 22F that extends forward from the upper front end portion 22a of the lid portion 22 beyond the front wall 21A of the case body portion 21, and a bolt fastening portion 22c that extends forward from the front flange portion 22F and is fastened to the case body portion 21 by bolts. The mount bracket 12 has a member mounting portion 12A that is connected to the cross member 3, and a connecting portion 12C that inclins forward as it goes upward from the annular portion 12B and connects the annular portion 12B and the member mounting portion 12A, and the front flange portion 22F faces the connecting portion 12C in the front-rear direction.

Description

Technical Field

[0001] The present invention relates to a support structure for a drive device.

Background Art

[0002] Conventionally, a power unit suspension structure for an electric vehicle is known in which a power unit composed of a motor and a speed reducer is disposed below the rear floor, and the front portion of the power unit is suspended to a front cross frame portion via a motor side front mount bracket (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the conventional power unit suspension structure of an electric vehicle, when the power unit is impacted from behind during a rear-end collision of the vehicle, there is no configuration to avoid the front wall of the power unit from colliding with a vehicle body member or the like provided in front of the power unit.

[0005] Therefore, if the front wall of the power unit collides with the motor side front mount bracket, there is a risk that the motor or the like housed in the power unit cannot be protected.

[0006] The present invention has been made paying attention to the above circumstances, and an object thereof is to provide a support structure for a drive device that suppresses an impact from being applied to the front wall of the case main body portion during a rear-end collision of the vehicle and protects the rotating electric machine and the power control device from the impact.

Means for Solving the Problems

[0007] ​The present invention relates to a drive device having a rotating electric machine, a power control device positioned above the rotating electric machine and controlling the power supplied to the rotating electric machine, a case body portion housing the rotating electric machine and the power control device, a lid portion attached to the upper part of the case body portion, the drive device being positioned in a forward-tilting state such that the upper front end of the lid portion is located below the upper rear end of the lid portion, and a cross member provided in front of the drive device and extending in the vehicle width direction, and a mounting bracket connecting the front wall of the case body portion and the cross member, wherein the lid portion is The mounting bracket has a front flange portion extending forward from the upper front end of the lid portion beyond the front wall of the case body portion, and a pair of bolt fastening portions provided on the front flange portion and fastened to the case body portion by bolts, and the mounting bracket has a housing portion that houses a mounting bush connected to the front wall of the case body portion, a member mounting portion connected to the cross member, and a connecting portion that inclins forward as it extends upward from the housing portion and connects the housing portion and the member mounting portion, and the front flange portion is characterized in that it faces the connecting portion in the front-rear direction of the vehicle. [Effects of the Invention]

[0008] As described above, according to the present invention, in the event of a rear-end collision with a vehicle, the impact on the front wall of the case body can be suppressed, and the rotating electric machine and power control device can be protected from impact. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a diagram showing the support structure of a drive device according to one embodiment of the present invention, and is a bottom view of the rear of a vehicle. [Figure 2] Figure 2 is a cross-sectional view taken along the line II-II in Figure 1. [Figure 3] Figure 3 is a cross-sectional view taken along the line III-III in Figure 1. [Figure 4] Figure 4 is a diagram showing the support structure of a drive device according to one embodiment of the present invention, and is a front view of the drive device. [Figure 5]Figure 5 is a diagram showing the support structure of a drive device according to one embodiment of the present invention, and is a top view of the drive device. [Modes for carrying out the invention]

[0010] A drive unit support structure according to one embodiment of the present invention comprises a rotating electric machine, a power control device positioned above the rotating electric machine and controlling the power supplied to the rotating electric machine, a case body housing the rotating electric machine and the power control device, a lid attached to the upper part of the case body, a drive unit positioned in a forward-tilting state such that the upper front end of the lid is located below the upper rear end of the lid, a cross member provided in front of the drive unit and extending in the vehicle width direction, and a mount bracket connecting the front wall of the case body and the cross member, wherein the lid has a front flange portion extending forward from the upper front end of the lid beyond the front wall of the case body, and a pair of bolt fastening portions provided on the front flange portion and fastened to the case body by bolts, the mount bracket has a housing portion housing a mount bush connected to the front wall of the case body, a member mounting portion connected to the cross member, and a connecting portion that inclins forward as it extends upward from the housing portion and connects the housing portion and the member mounting portion, and the front flange portion faces the connecting portion in the longitudinal direction of the vehicle.

[0011] As a result, the support structure for the drive device according to one embodiment of the present invention can suppress impact on the front wall of the case body during a rear-end collision of a vehicle, thereby protecting the rotating electric machine and the power control device from impact. [Examples]

[0012] The following describes a support structure for a drive device according to one embodiment of the present invention, with reference to the drawings. Figures 1 to 5 show the support structure of a drive device according to one embodiment of the present invention.

[0013] First, let me explain the structure. In FIGS. 1 to 5, the vertical, front-rear, and left-right directions are based on the drive device in the state of being arranged in the vehicle. The front-rear direction of the vehicle is the front-rear direction, the left-right direction (vehicle width direction) of the vehicle is the left-right direction, and the vertical direction (height direction) of the vehicle is the vertical direction.

[0014] As shown in FIG. 1, the vehicle 1 includes a left side member 2L, a right side member 2R, a cross member 3, and a sub side member 4.

[0015] The left side member 2L and the right side member 2R are arranged apart from each other in the vehicle width direction and extend in the front-rear direction. The vehicle width direction is the left-right direction.

[0016] The cross member 3 extends in the vehicle width direction, and its left and right ends are connected to the left side member 2L and the right side member 2R. The front end of the sub side member 4 is connected to the cross member 3, and the rear end is connected to a cross member on the rear side (not shown).

[0017] A drive device 5 is arranged in the space surrounded by the left side member 2L, the sub side member 4, and the cross member 3.

[0018] Specifically, the drive device 5 is arranged between the left side member 2L and the sub side member 4 in the vehicle width direction and behind the cross member 3 in the front-rear direction. That is, the cross member 3 is arranged in front of the drive device 5.

[0019] The drive device 5 includes a motor generator (not shown) as a rotating electric machine, an inverter 6 (see FIG. 3) as a power control device provided above the motor generator and controlling the power supplied to the motor generator, a speed reducer (not shown) for reducing the driving force (rotation speed) of the motor generator, and a differential device (not shown) for transmitting the power of the speed reducer to the left and right rear wheels (not shown) via the left drive shaft 7L and the right drive shaft 7R.

[0020] The motor generator, the inverter 6, the reduction gear, and the differential device are housed in the drive case 8.

[0021] Specifically, as shown in FIGS. 2 and 3, the drive case 8 includes a case main body portion 21 that houses the motor generator, the inverter 6, the reduction gear, and the differential device, and a lid portion 22 attached to the upper end portion of the case main body portion 21.

[0022] The motor generator has a function as an electric motor driven by electric power supplied from a high-voltage battery (not shown) via the inverter 6, and a function as a generator that generates electric power by a reverse driving force input from the differential device.

[0023] The inverter 6 converts the DC power supplied from the high-voltage battery into three-phase AC power and supplies it to the motor generator, or converts the three-phase AC power generated by the motor generator into DC power to charge the high-voltage battery. The high-voltage battery is constituted by a secondary battery such as a lithium-ion battery, for example.

[0024] As shown in FIG. 3, the inverter 6 is disposed at the uppermost position of the case main body portion 21 so as to be located above the motor generator, the reduction gear, and the differential device, and extends from the upper front end portion 22a to the upper rear end portion 22b of the lid portion 22 in the upper space of the case main body portion 21.

[0025] The upper front end portion 22a of the lid portion 22 of the present embodiment constitutes the upper front end portion of the case, and the upper rear end portion 22b of the lid portion 22 constitutes the upper rear end portion of the case.

[0026] As shown in FIG. 5, a front flange portion 22F is provided at the front end portion of the lid portion 22, and the front flange portion 22F extends forward from the upper front end portion 22a of the lid portion 22 beyond the front wall 21A of the case main body portion 21 (see FIG. 2).

[0027] The front flange portion 22F is provided with a pair of bolt fastening portions 22c and 22d that bulge forward from the front flange portion 22F, and the bolt fastening portions 22c and 22d are fastened to the case body portion 21 by bolts 13A.

[0028] The bolt fastening portions 22c and 22d have bulging portions 22f and 22g that protrude forward from the front flange portion 22F.

[0029] An outer peripheral flange portion 22A is provided on the outer peripheral edge of the lid portion 22, excluding the front end portion. The lid portion 22 is fastened to the case body portion 21 by bolts at bolt fastening portions (not shown) provided on the outer peripheral flange portion 22A. Bolt fastening portions (not shown) are also provided on both sides in the width direction of the front flange portion 22F.

[0030] As shown in Figures 2 and 3, the drive unit 5 is located below the floor panel 9 and at the rear of the vehicle 1. At the front of the vehicle 1 are a drive source (not shown), the left and right drive shafts to which the power from the drive source is transmitted, and the left and right front wheels.

[0031] In this embodiment, vehicle 1 can be driven in two-wheel drive mode when only the front drive source is driven, and in four-wheel drive mode when both the drive source and the drive unit 5 are driven. The front drive source is not particularly limited.

[0032] The drive unit 5 is elastically supported on the cross member 3 by the front mounting device 10. As shown in Figure 3, the front mounting device 10 has a mounting bush 11 and a mounting bracket 12. In this embodiment, the front mounting device 10 constitutes the mounting device.

[0033] The mounting bush 11 comprises an inner cylinder 11A whose central axis extends in the front-rear direction, an outer cylinder 11B provided radially outward from the inner cylinder 11A and whose central axis also extends in the front-rear direction, and a mounting rubber 11C provided radially between the inner cylinder 11A and the outer cylinder 11B and connecting the inner cylinder 11A and the outer cylinder 11B, and is formed in a cylindrical shape overall.

[0034] The inner cylinder 11A is fastened (connected) to the lower part of the front wall 21A of the case body 21 by bolts 13B, and the mounting bush 11 is positioned so that its central axis extends in the front-rear direction.

[0035] As shown in Figures 3 and 4, the mount bracket 12 has a member mounting portion 12A that extends in the vehicle width direction and is fastened (connected) to the lower surface of the cross member 3 by bolts 13C, an annular portion 12B that houses the mount bush 11 when the mount bush 11 is press-fitted into it, and a connecting portion 12C that connects the annular portion 12B and the member mounting portion 12A. In this embodiment, the annular portion 12B constitutes the housing portion.

[0036] As shown in Figures 2 and 3, the connecting portion 12C is inclined diagonally upward and forward from the annular portion 12B toward the member mounting portion 12A, such that the annular portion 12B is located behind the member mounting portion 12A and the member mounting portion 12A is located in front of the annular portion 12B. In other words, the connecting portion 12C is inclined forward as it extends upward from the annular portion 12B.

[0037] As shown in Figure 1, a left mounting device 14 and a right mounting device 15 are attached to the drive case 8. The drive unit 5 is elastically supported by the left side member 2L and the sub-side member 4 by the left mounting device 14 and the right mounting device 15.

[0038] The left mounting device 14 has a mounting bracket 16. The mounting bracket 16 has a member mounting portion 16A which is fastened (connected) to the lower surface of the left side member 2L by a bolt 13D, an annular portion 16B which houses a cylindrical mounting bush (not shown) equipped with mounting rubber, and a connecting portion 16C which connects the annular portion 16B and the member mounting portion 16A.

[0039] The member mounting portion 16A is located above the annular portion 16B, and the connecting portion 16C extends in the vehicle width direction. The mounting bush of the left mounting device 14 is connected to the left side wall 21B of the case body portion 21 by a bolt 13E.

[0040] The right mounting device 15 has a mounting bracket 17. The mounting bracket 17 has a member mounting portion 17A that is fastened (connected) to the lower surface of the sub-side member 4 by bolts 13F, and an annular portion 17B that houses a cylindrical mounting bush (not shown) equipped with mounting rubber, with the member mounting portion 17A located above the annular portion 17B. The mounting bush of the right mounting device 15 is connected to the right side wall 21C of the case body portion 21 by bolts 13G.

[0041] The front mounting device 10, the left mounting device 14, and the right mounting device 15 have their annular sections 12B, 16B, and 17B positioned at the lowest level.

[0042] In other words, the drive unit 5 is elastically supported by the left side member 2L, the sub-side member 4, and the cross member 3, by being suspended from the left side member 2L, the sub-side member 4, and the cross member 3 by the front mounting device 10, the left mounting device 14, and the right mounting device 15.

[0043] As shown in Figure 3, the drive unit 5 is positioned in a forward-tilting position such that the upper front end 22a of the lid 22 is located below the lower surface 3a of the cross member 3, and the upper rear end 22b of the lid 22 is located above the lower surface 3a of the cross member 3.

[0044] In other words, the drive unit 5 is positioned in a forward-tilting position such that the upper front end 22a of the lid 22 is located lower than the upper rear end 22b.

[0045] The upper surface 22e of the lid portion 22 is formed as a plane that slopes from the upper front end portion 22a toward the upper rear end portion 22b.

[0046] As shown in Figures 2 and 3, a bulge 9A is formed in the floor panel 9, and the bulge 9A bulges upward from the horizontal portion 9a of the floor panel 9.

[0047] The bulging portion 9A has an inclined portion 9b and a rear wall portion 9c. The inclined portion 9b faces the upper surface 22e of the lid portion 22 in the vertical direction and is inclined upward from the front end to the rear end. In other words, a gap is formed between the inclined portion 9b and the upper surface 22e of the lid portion 22.

[0048] Since the drive unit 5 is positioned in a forward-tilting position, it extends into the passenger compartment from the horizontal portion 9a of the floor panel 9. This prevents the vertical dimensions of the vehicle 1 from increasing, thereby enabling a more compact vehicle 1.

[0049] The front flange portion 22F faces the connecting portion 12C in the front-rear direction, and a gap in the front-rear direction is formed between the front flange portion 22F and the connecting portion 12C.

[0050] As shown in Figure 3, the front flange portion 22F is positioned forward of a first virtual vertical plane L1 that crosses the connection between the mount bush 11 and the front wall 21A of the case body portion 21 in the vertical direction. In this embodiment, the first virtual vertical plane L1 constitutes a virtual plane.

[0051] In the connecting portion 12C, the virtual inclined plane L2 passing through the rear end portion 12a of the connecting portion 12C is inclined by an angle θ1 with respect to the first virtual vertical plane L1, and a gap is formed between the front flange portion 22F and the rear end portion 12a of the connecting portion 12C.

[0052] The drive unit 5 is tilted forward such that a second virtual inclined plane L4, which is perpendicular to the upper surface 22e of the lid 22, has an angle θ2 with respect to a second virtual vertical plane L3 that passes vertically through the center of gravity O of the drive unit 5. In other words, the second virtual inclined plane L4, which is perpendicular to the upper surface 22e of the lid 22, i.e., the upper surface 22e of the drive case 8, and passes through the center of gravity O of the drive unit 5, is tilted forward by an angle θ2 with respect to the second virtual vertical plane L3.

[0053] The inclination angle θ1 of the first virtual inclined plane L2 relative to the first virtual vertical plane L1 is greater than the inclination angle θ2 of the second virtual inclined plane L4 relative to the second virtual vertical plane L3.

[0054] In this embodiment, the drive unit 5 is positioned in a forward-tilting state such that the upper front end 22a of the lid 22 is located below the upper rear end 22b. This eliminates the need to extend the front flange portion 22F far forward from the upper front end 22a of the lid 22, allowing the front flange portion 22F to be positioned forward with respect to the first virtual vertical plane L1.

[0055] As shown in Figure 4, the front wall 21A of the case body 21 is provided with a cooling water inlet pipe 23 and a cooling water outlet pipe 24, and the cooling water inlet pipe 23 and the cooling water outlet pipe 24 are connected to bosses 21a and 21b formed on the front wall 21A. The front wall 21A of the case body 21 constitutes the front wall of the case.

[0056] The cooling water introduction pipe 23 introduces cooling water into the drive case 8. The cooling water introduced into the drive case 8 is supplied around the inverter 6, thereby cooling the inverter 6 with the cooling water.

[0057] The cooling water that has cooled the inverter 6 is discharged from inside the drive case 8 through the cooling water discharge pipe 24.

[0058] A radiator (not shown) is located in front of the drive unit 5, and cooling water intake pipes 23 and cooling water discharge pipes 24 are connected to the radiator by cooling water piping (not shown) through which cooling water flows.

[0059] In this embodiment, the cooling water introduction pipe 23 and the cooling water discharge pipe 24 are connected to the bosses 21a and 21b of the front wall 21A of the case body 21, so the length of the cooling water piping can be shortened.

[0060] In this embodiment, the cooling water inlet pipe 23 constitutes the coolant inlet pipe, and the cooling water discharge pipe 24 constitutes the coolant discharge pipe. Note that the coolant used to cool the inverter 6 is not limited to cooling water.

[0061] The cooling water inlet pipe 23 and the cooling water outlet pipe 24 are located behind the front end 12b of the connecting section 12C, and extend in the vehicle width direction from the front wall 21A of the case body 21, bending in the vehicle width direction so as to face the connecting section 12C in the vehicle width direction.

[0062] In other words, the coolant inlet pipe 23 extends forward from the front wall 21A (boss portion 21a) of the case body 21, then bends to the right in the vehicle width direction away from the connecting portion 12C. The coolant discharge pipe 24 extends forward from the front wall 21A (boss portion 21b) of the case body 21, then bends to the left in the vehicle width direction away from the connecting portion 12C.

[0063] Furthermore, the cooling water inlet pipe 23 and the cooling water outlet pipe 24 are positioned behind the front end 12b of the annular section 12B, which is located closest to the front wall 21A of the case body 21 in the front-rear direction. In other words, the cooling water inlet pipe 23 and the cooling water outlet pipe 24 are positioned behind the front end of the mount bracket 12 (the front end 12b of the connecting section 12C and the front end 12b of the annular section 12B).

[0064] In other words, the mounting bracket 12 is positioned such that the front end 12b of the connecting portion 12C and the front end 12b of the annular portion 12B are located in front of the cooling water introduction pipe 23 and the cooling water discharge pipe 24.

[0065] As shown in Figure 5, when the drive unit 5 is viewed from above, the connecting portion 12C is positioned between the bulging portions 22f and 22g in the vehicle width direction, and the front flange portion 22F is located between the member mounting portion 12A and the annular portion 12B in the front-rear direction.

[0066] Furthermore, the cooling water inlet pipe 23 and the cooling water outlet pipe 24 are positioned outward in the vehicle width direction relative to the bolt fastening portions 22c and 22d, and face the connecting portion 12C in the vehicle width direction, with the bolt fastening portions 22c and 22d in between.

[0067] Next, the effects of the support structure of the drive unit 5 in this embodiment will be explained. The support structure of the drive unit 5 in this embodiment comprises a motor generator, an inverter 6 positioned above the motor generator and controlling the power supplied to the motor generator, a case body 21 housing the motor generator and the inverter 6, and a lid 22 attached to the upper part of the case body 21, and the drive unit 5 is positioned in a forward-tilting state such that the upper front end 22a of the lid 22 is located below the upper rear end 22b of the lid 22.

[0068] Furthermore, the support structure of the drive unit 5 in this embodiment includes a cross member 3 provided in front of the drive unit 5 and extending in the vehicle width direction, and a mounting bracket 12 that connects the front wall 21A of the case body 21 and the cross member 3.

[0069] The lid portion 22 has a front flange portion 22F that extends forward from the upper front end portion 22a of the lid portion 22 beyond the front wall 21A of the case body portion 21, and bolt fastening portions 22c and 22d that extend forward from the front flange portion 22F and are fastened to the case body portion 21 by bolts.

[0070] The mounting bracket 12 has an annular portion 12B that houses a cylindrical mounting bush 11 connected to the front wall 21A of the case body 21, a member mounting portion 12A connected to the cross member 3, and a connecting portion 12C that inclines forward as it extends upward from the annular portion 12B and connects the annular portion 12B and the member mounting portion 12A, and the front flange portion 22F faces the connecting portion 12C in the front-rear direction.

[0071] When an impact load is applied to the drive unit 5 from the rear during a rear-end collision of vehicle 1, the drive unit 5 rotates forward (in the R1 direction) around the center of gravity O, and the upper front end portion 22a moves toward the connecting portion 12C.

[0072] In the drive unit 5, the inclination angle θ1 of the first virtual inclined plane L2 with respect to the first virtual vertical plane L1 is larger than the inclination angle θ2 of the second virtual inclined plane L4 with respect to the second virtual vertical plane L3, so a large space can be created between the front flange portion 22F and the rear end portion 12a of the connecting portion 12C.

[0073] Therefore, when the impact load applied to the drive unit 5 from the rear during a rear-end collision of vehicle 1 is small, the drive unit 5 rotates forward (in the R1 direction) around the center of gravity O within the space between the front flange portion 22F and the rear end portion 12a of the connecting portion 12C, thereby avoiding the front wall 21A of the case body portion 21 colliding with the connecting portion 12C.

[0074] On the other hand, if the impact load applied to the drive unit 5 from the rear during a rear-end collision of vehicle 1 is large, the drive unit 5 rotates forward (in the R1 direction) around the center of gravity O to eliminate the space between the front flange portion 22F and the rear end portion 12a of the connecting portion 12C.

[0075] At this time, the front flange portion 22F collides with the connecting portion 12C, which can suppress further forward rotation of the drive unit 5. The front flange portion 22F is provided with bolt fastening portions 22c and 22d and is a highly rigid part of the drive case 8. Therefore, by causing the front flange portion 22F to collide with the connecting portion 12C first, further forward rotation of the drive unit 5 can be effectively suppressed.

[0076] Furthermore, the front flange portion 22F extends forward from the upper front end portion 22a of the lid portion 22, and the inverter 6 is positioned on the upper part of the case body portion 21. Therefore, the collision of the front flange portion 22F with the connecting portion 12C can prevent the front wall 21A from colliding with the connecting portion 12C.

[0077] As a result, the inverter 6 and motor generator housed in the case body 21 can be protected from collisions.

[0078] Furthermore, according to the support structure of the drive unit 5 of this embodiment, the front flange portion 22F is located in front of the first vertical virtual plane L1 that crosses the connection portion between the mount bush 11 and the front wall 21A of the case body portion 21 in the vertical direction.

[0079] This allows for a wide space to be secured between the front flange portion 22F and the rear end portion 12a of the connecting portion 12C, enabling the drive unit 5 to rotate forward (in the R1 direction) around the center of gravity O within the range of the space between the front flange portion 22F and the rear end portion 12a of the connecting portion 12C.

[0080] Therefore, when the impact load applied to the drive unit 5 from the rear is small, the front wall 21A of the case body 21 can be more effectively prevented from colliding with the connecting part 12C.

[0081] Furthermore, according to the support structure of the drive unit 5 of this embodiment, the front flange portion 22F has a pair of bolt fastening portions 22c and 22d provided on the front flange portion 22F and fastened to the case body portion 21 by bolts.

[0082] The bolt fastening portions 22c and 22d have bulging portions 22f and 22g that protrude forward from the front flange portion 22F, and when the drive unit 5 is viewed from above, the connecting portion 12C is positioned so as to be sandwiched between the bulging portions 22f and 22g in the vehicle width direction.

[0083] As a result, when the vehicle 1 is rear-ended, if the front flange portion 22F collides with the connecting portion 12C and the drive case 8 moves in the vehicle width direction (when a load is applied in the vehicle width direction), the bulging portions 22f and 22g can come into contact with the mount bracket 12 in the vehicle width direction, thereby suppressing excessive movement of the drive case 8 in the vehicle width direction.

[0084] Furthermore, according to the support structure of the drive unit 5 of this embodiment, there is a cooling water introduction pipe 23 connected to the front wall 21A of the case body 21 through which cooling water for cooling the inverter 6 is introduced, and a cooling water discharge pipe 24 connected to the front wall 21A of the case body 21 through which the cooling water that has cooled the inverter 6 is discharged. The cooling water introduction pipe 23 and the cooling water discharge pipe 24 are arranged outward in the vehicle width direction with respect to the bolt fastening portions 22c and 22d.

[0085] Therefore, the coolant inlet pipe 23 and the coolant outlet pipe 24 can be positioned outward in the vehicle width direction relative to the mount bracket 12, preventing the coolant inlet pipe 23 and the coolant outlet pipe 24 from contacting the mount bracket 12 in the event of a rear-end collision of the vehicle 1. As a result, the coolant inlet pipe 23, the coolant outlet pipe 24, and the boss portions 21a and 21b can be protected from impact.

[0086] While embodiments of the present invention have been disclosed, it will be apparent to those skilled in the art that modifications can be made without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the following claims. [Explanation of symbols]

[0087] 1 vehicle 3 Cross Member 5. Drive unit 6. Inverter (Power Control Device) 11 Mount Bushing 12 Mounting Bracket 12A Member mounting section 12a Rear end (rear end of connecting wall) 12B Ring section (housing section) 12C Liaison Office 13A volt 21 Case body 21A Front wall (front wall of the case) 22 Lid 22a Upper front end (upper front end of the case) 22b Upper rear end (upper rear end of the case) 22F Front flange section 22c, 22d Bolt fastening section 23. Cooling water inlet piping (coolant inlet piping) 24 Cooling water discharge piping (cooling liquid discharge piping) L1 First vertical virtual plane (virtual plane)

Claims

1. A drive device comprising a rotating electric machine, a power control device positioned above the rotating electric machine and controlling the power supplied to the rotating electric machine, a case body housing the rotating electric machine and the power control device, and a lid attached to the upper part of the case body, wherein the upper front end of the lid is positioned lower than the upper rear end of the lid, A cross member is provided in front of the aforementioned drive unit and extends in the vehicle width direction, A support structure for a drive device comprising a mounting bracket connecting the front wall of the case body and the cross member, The lid portion has a front flange portion extending forward from the upper front end of the lid portion beyond the front wall of the case body portion, and a pair of bolt fastening portions provided on the front flange portion and fastened to the case body portion by bolts. The aforementioned mounting bracket is A housing portion which houses a mounting bush connected to the front wall of the case body, A member mounting portion connected to the cross member, The housing portion is inclined forward as it extends upward, and has a connecting portion that connects the housing portion and the member mounting portion. The support structure for the drive unit is characterized in that the front flange portion is opposite the connecting portion in the longitudinal direction of the vehicle.

2. The support structure for the drive device according to claim 1, characterized in that the front flange portion is located forward of a virtual plane that crosses the connection portion between the mount bush and the front wall of the case body portion in the vertical direction.

3. Each of the pair of bolt fastening portions has a bulge that extends forward from the front flange portion, The drive support structure according to claim 1 or 2, characterized in that, when the drive device is viewed from above, the connecting portion is positioned so as to be sandwiched between the bulging portion in the vehicle width direction.

4. The case body has a coolant introduction pipe connected to the front wall through which coolant is introduced to cool the power control device, and a coolant discharge pipe connected to the front wall of the case body through which the coolant that has cooled the power control device is discharged. The drive unit support structure according to claim 1 or 2, characterized in that the coolant introduction pipe and the coolant discharge pipe are arranged outward in the vehicle width direction with respect to the bolt fastening portion.

5. The case body has a coolant introduction pipe connected to the front wall through which coolant is introduced to cool the power control device, and a coolant discharge pipe connected to the front wall of the case body through which the coolant that has cooled the power control device is discharged. The drive unit support structure according to claim 3, characterized in that the coolant introduction pipe and the coolant discharge pipe are arranged outward in the vehicle width direction with respect to the bolt fastening portion.

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