Drive device

Abstract

The drive device disclosed in the present invention includes: an electric motor including a stator and a rotor, a housing for accommodating the electric motor, and a drive shaft connected to a wheel, and is mounted on a vehicle in such a manner that the housing partially overlaps with a side beam when viewed from the vehicle width direction, and the housing includes: a plurality of radial ribs protruding in the vehicle width direction and extending radially; and a connecting rib protruding in the vehicle width direction and connected to the central side end of the plurality of radial ribs, and at least a portion of the plurality of radial ribs reaches a first area of ​​the housing that overlaps with the side beam and does not overlap with the wheel when viewed from the vehicle width direction. Thus, the strength of the housing of the drive device including the electric motor and mounted on the vehicle can be improved.

Description

Technical Field

[0001] The present disclosure relates to a drive device that includes an electric motor and a housing that accommodates the electric motor and is mounted on a vehicle. Background Art

[0002] In the past, there is known a drive device that includes a motor and is mounted on a hybrid vehicle or an electric vehicle as a power source (for example, see Patent Document 1). In this drive device, the motor is housed inside a housing (casing) together with a reduction gear that reduces the rotation of the motor and a differential that transmits torque from the motor side to the axle (drive shaft). In addition, the drive device is mounted on the vehicle in a manner that the axis of the motor shaft and the differential (differential shaft) extend in the left-right direction of the vehicle (vehicle width direction).

[0003] References

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2020-174481 Summary of the invention

[0006] When a vehicle equipped with a drive device such as the above is subjected to a collision (front collision or side collision), there is a risk that the side beam of the vehicle may deform and directly interfere with the housing (casing) of the drive device, or other structures such as poles may directly interfere with the housing of the drive device from the side of the vehicle. Therefore, in order to withstand the impact of a collision, the strength of the housing that accommodates the motor, which is a high-voltage component, needs to be further improved in the drive device.

[0007] Therefore, a main object of the present disclosure is to further improve the strength of a housing of a drive device that includes an electric motor and is mounted on a vehicle.

[0008] The drive device disclosed in the present invention includes: an electric motor, which includes a stator and a rotor; a housing, which accommodates the electric motor; and a drive shaft, which is connected to a wheel, and the drive device is mounted on a vehicle in a manner that the housing partially overlaps with a side beam when viewed in the vehicle width direction, wherein the drive device includes: a plurality of radial ribs, each of which protrudes in the vehicle width direction and is formed on the housing in a radially extending manner, wherein at least a portion of the plurality of radial ribs reaches a first area of ​​the housing, and the first area is an area that overlaps with the side beam and does not overlap with the wheel when viewed in the vehicle width direction; and a connecting rib, which protrudes in the vehicle width direction and is formed on the housing in combination with the center side end portions of the plurality of radial ribs.

[0009] In the drive device disclosed in the present invention, the housing for accommodating the electric motor includes: a plurality of radial ribs protruding in the vehicle width direction and extending radially; and a connecting rib protruding in the vehicle width direction and connected to the center side end of the plurality of radial ribs. Furthermore, at least a portion of the plurality of radial ribs reaches a first area of ​​the housing that overlaps with the side beam when viewed from the vehicle width direction and does not overlap with the wheel. When a vehicle including such a drive device is subjected to a front collision or a side collision, the side beam hits a portion of the radial rib connected to the connecting rib that is included in the first area. Thus, when the side beam hits the first area of ​​the housing, the stress applied to the radial rib from the side beam can be released to the connecting rib side having high strength, so that the stress in the first area can be reduced, and the occurrence of damage in the first area can be well suppressed. As a result, the strength of the housing of the drive device including the electric motor and mounted on the vehicle can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic structural diagram showing a vehicle including the drive device of the present disclosure.

[0011] Figure 2 It is an enlarged cross-sectional view showing the driving device of the present disclosure.

[0012] Figure 3 It is a side view showing a housing of the driving device of the present disclosure. DETAILED DESCRIPTION

[0013] Hereinafter, a mode for carrying out the invention disclosed herein will be described with reference to the drawings.

[0014] Figure 1 1 is a schematic diagram showing a structure of a vehicle 1 including a transaxle 20 as a drive device according to the present disclosure. Figure 1 The vehicle 1 shown is a hybrid vehicle including an engine (internal combustion engine) 10, a transmission drive axle 20 and a battery (power storage device) not shown in the figure. The transmission drive axle 20 is a drive device that includes electric generators MG1 and MG2 and is connected to the engine 10. The battery transfers electric power to and from the electric generators MG1 and MG2 of the transmission drive axle 20 via an inverter not shown in the figure.

[0015] The engine 10 is a gasoline engine that burns a mixture of gasoline (hydrocarbon fuel) and air injected from an injector (not shown) in a plurality of combustion chambers, and converts the reciprocating motion of a piston accompanying the combustion of the mixture into the rotational motion of a crankshaft. However, the engine 10 may also be a diesel engine or an LPG engine.

[0016] Transaxle 20, such as Figure 1As shown, in addition to the motor generators MG1 and MG2, the motor generator MG1 also includes a planetary gear 30 and a housing 40 that accommodates these components. The motor generator MG1 (first motor) is a synchronous motor generator (three-phase AC motor) including a stator S1 and a rotor R1, and mainly works as a generator that converts at least a part of the power from the engine 10 running under load into electric power. The motor generator MG2 (second motor) is a synchronous motor generator (three-phase AC motor) including a stator S2 and a rotor R2, and mainly works as a motor that is driven by at least one of the electric power from the battery and the electric power from the motor generator MG1 to generate a driving torque. The motor generators MG1 and MG2 transfer electric power to and from the above-mentioned battery via a power control device not shown in the figure, and transfer electric power to and from each other via the power control device.

[0017] The planetary gear 30 is a differential rotation mechanism including a sun gear (first rotation member) 31, a ring gear (second rotation member) 32, and a planetary gear carrier (third rotation member) 34 that rotatably supports a plurality of pinion gears 33. Figure 1 As shown, sun gear 31 is connected to rotor R1 of motor generator MG1 via hollow rotor shaft RS, and planetary carrier 34 is connected to the crankshaft of engine 10 via damper mechanism 25. Ring gear 32 is integrated with counter drive gear 35 as an output member, and both rotate coaxially and integrally.

[0018] The counter drive gear 35 is connected to the wheels W constituting the left and right drive wheels together with tires (not shown) via the counter driven gear 36 meshing with the counter drive gear 35, the final drive gear (drive pinion) 37 rotating integrally with the counter driven gear 36, the final driven gear (differential gear) 39r meshing with the final drive gear 37, the differential gear 39, and the drive shaft DS. The gear train from the transaxle 20, that is, the planetary gear 30, the counter drive gear 35 to the final driven gear 39r, and the differential gear 39 connects the engine 10 and the motor generator MG1 to each other, and transmits a part of the output torque of the engine 10 as a power generation source to the drive shaft DS and the wheels W.

[0019] In addition, the drive gear 38 is connected (fixed) to the rotor R2 of the motor generator MG2 in a manner that rotates integrally. The drive gear 38 has a smaller number of teeth than the counter driven gear 36, and meshes with the counter driven gear 36. Thus, the motor generator MG2 is connected to the left and right drive shafts DS and the wheels W via the drive gear 38, the counter driven gear 36, the final drive gear 37, the final driven gear 39r, and the differential gear 39. That is, the motor generator MG2 functions as a power generation device that outputs a drive torque (driving force) to the drive shaft DS and the wheels W alone or in cooperation with the engine 10, and outputs a regenerative braking torque when the vehicle 1 is braked.

[0020] The housing 40 of the transaxle 20 includes a first housing 41, a second housing 42, and a cover (third housing) 45. The first housing 41 is fastened (coupled) to the engine block of the engine 10 via a plurality of bolts. The second housing 42 is fastened (coupled) to the first housing 41 via a plurality of bolts, and together with the first housing 41, constitutes a housing body. The cover 45 is fastened (coupled) to the second housing 42 by a plurality of bolts so as to cover one end of the housing body in the vehicle width direction, that is, the open end of the second housing 42. In the present embodiment, the first housing 41, the second housing 42, and the cover 45 are all cast products formed of, for example, aluminum alloy or steel.

[0021] In addition, in the transaxle 20, the rotor shaft RS of the motor generator MG1 is Figure 2 As shown, the bearings B1 and B2 are supported so as to be freely rotatable. In the present embodiment, the bearing B1 is a ball bearing including an inner ring IL fixed to the rotor shaft RS by press-fitting, and an outer ring OL fixed to the cylindrical portion 451 formed on the cover 45 of the housing 40 by press-fitting. In addition, the bearing B2 is a ball bearing including an inner ring IL fixed to the rotor shaft RS by press-fitting, and a part of the second housing 42 fixed to the housing 40 by press-fitting (in Figure 2 The outer ring OL of the ball bearing is omitted in the figure.

[0022] Furthermore, the transaxle 20 includes a mechanical oil pump 50. Figure 2 As shown, the oil pump 50 includes an inner rotor 51 and an outer rotor 52 as pump rotors, and a pump cover 53 that defines a pump housing together with the cover 45 of the housing 40. The inner rotor 51 is an external gear (drive gear) having a plurality of external teeth (not shown), and is connected to the planetary gear carrier 34 of the planetary gear 30, that is, the crankshaft of the engine 10, via the hollow rotor R1 passing through the motor generator MG1 and the planetary gear carrier shaft CS in the rotor shaft RS. The outer rotor 52 is an internal gear (driven gear) having one more internal tooth than the total number of external teeth of the inner rotor 51.

[0023] In the present embodiment, the inner rotor 51 and the outer rotor 52 are arranged in a rotor accommodation chamber 450 formed on the cover 45 of the housing 40. The rotor accommodation chamber 450 is a concave portion with a circular cross section that is concave from the inner surface of the cover 45 to the outer side. The inner rotor 51 and the outer rotor 52 are meshed with one or more inner teeth of the outer rotor 52 and the corresponding outer teeth of the inner rotor 51, and the outer rotor 52 is arranged in the rotor accommodation chamber 450 so as to be rotatable in an eccentric manner relative to the inner rotor 51. In addition, the pump cover 53 has a through hole penetrated by the rotor shaft RS, and is fixed to the cover 45 so as to block the rotor accommodation chamber 450. Therefore, when the inner rotor 51 rotates by the power from the planetary gear carrier shaft CS, that is, the engine 10, the working oil (ATF) in the working oil storage portion (oil pan) not shown in the figure is sucked by the oil pump 50 through the filter (not shown), and the boosted working oil is supplied (discharged) to the hydraulic control device not shown in the figure.

[0024] Figure 3 This is a side view of the housing 40 of the transaxle 20 as viewed from the cover 45 side. As shown in the figure, the transaxle 20 is mounted on the vehicle 1 in such a manner that the housing 40 partially overlaps the side beam 2 of the vehicle 1 when viewed from the vehicle width direction (near the front side of the paper), and partially overlaps the wheel W connected to the transaxle 20. That is, for example, when the cover 45 is located on the left side of the vehicle 1, the side beam 2 is located on the left side of the cover 45, and the cover 45 partially overlaps the side beam 2 when viewed from the vehicle width direction.

[0025] In addition, if Figure 3 As shown, the shell 40 includes: a first area A1, which overlaps with the side beam 2 and does not overlap with the wheel W when viewed in the vehicle width direction; and a second area, which does not overlap with both the side beam 2 and the wheel W when viewed in the vehicle width direction. In the present embodiment, the first and second areas A1, A2 of the shell 40 are mainly divided by the cover 45. In addition, in the portion of the cover 45 included in the second area A2, a plurality of radial ribs 455 and connecting ribs 457 are formed by casting to protrude in the vehicle width direction and outward (near the front side of the paper). On the outer surface of the cover 45, the plurality of radial ribs 455 extend radially, and the connecting ribs 457 are connected to the center side ends of the plurality of radial ribs 455. In the present embodiment, as shown in FIG. Figure 3 As shown, a portion of the connecting rib 457 is included outside the second area A2 ( Figure 3 However, the entirety of the connecting rib 457 may be included in the second area A2.

[0026] The plurality of radial ribs 455 extend outward from the outer peripheral surface of the connecting rib 457 along a predetermined direction. Figure 3As shown, the plurality of radial ribs 455 include radial ribs 455a and 455b formed in such a manner that the front end portions of the radial ribs 455a and 455b extend beyond the second area A2 and reach the first area A1. Figure 3 As shown, the radial rib 455a includes a branch portion 456 branching from a main portion combined with the connecting rib 457, and the front end of the branch portion 456 also passes over the second area A2 and reaches the first area A1.

[0027] In this embodiment, if Figure 2 and Figure 3 As shown, the connection rib 457 is formed by connecting the outer surface of the cover 45 with the axis of the rotor R1 of the motor generator MG1 (see Figure 2 The connecting rib 457 is an annular (cylindrical) protrusion formed in a manner that protrudes outward coaxially with the single-dot chain line in the figure. That is, the connecting rib 457 is formed on the cover 45 in a manner that the axis of the rotor R1 of the motor generator MG1 passes through the inner side of the connecting rib 457, and extends in an annular shape around the axis of the rotor R1 when viewed from the vehicle width direction. Figure 2 As can be seen, the connection rib 457 surrounds the rotor accommodation chamber 450 that accommodates the inner rotor 51 and the outer rotor 52 of the oil pump 50 when viewed from the vehicle width direction.

[0028] Furthermore, the connecting rib 457 extends coaxially with the cylindrical portion 451 corresponding to the bearing B1, and has an outer diameter slightly smaller than the inner diameter of the cylindrical portion 451, and at least partially overlaps with the outer ring OL of the bearing B1 pressed into the cylindrical portion 451 when viewed from the vehicle width direction. Furthermore, a plurality of (three in this embodiment) support seats 458 are formed at intervals in the circumferential direction at the free end of the connecting rib 457. Each support seat 458 is a short protrusion having a flat end face and protruding in the axial direction of the connecting rib 457, and at least partially overlaps with the outer ring OL of the bearing B1 when viewed from the vehicle width direction. In addition, the end faces of the plurality of support seats 458 are contained in a plane orthogonal to the axis of the rotor R1 of the motor generator MG1.

[0029] As described above, in the transaxle 20, the housing 40 that accommodates the motor generator MG1 and the like includes: a first area A1 that overlaps with the side beam 2 and does not overlap with the wheel W when viewed in the vehicle width direction; and a second area A2 that does not overlap with both the side beam 2 and the wheel W when viewed in the vehicle width direction. In addition, the cover 45 of the housing 40 includes: a plurality of radial ribs 455 that protrude outward (near the front side of the paper) in the vehicle width direction and extend radially in the second area A2; and at least a portion of the connecting rib 457 that protrudes in the vehicle width direction and is connected to the center side end of the plurality of radial ribs 455 in the second area A2. As a result, in the transaxle 20, the strength of the second area A2 of the housing 40 (cover 45) that does not overlap with both the side beam 2 and the wheel W can be well ensured.

[0030] Furthermore, the front ends of the radial ribs 455a and 455b among the plurality of radial ribs 455 and the branch portion 456 of the radial rib 455a extend beyond the second area A2 to reach the first area A1. Thus, when the vehicle 1 is subjected to a collision such as a frontal collision or a side collision, the side member 2 hits the radial ribs 455a and 455b connected to the connecting rib 457 and the portion included in the branch portion 456 (see Figure 3 Thus, the stress applied from the side member 2 to the radial ribs 455a, 455b, etc. can be released toward the connecting rib 457 having high strength, that is, the second area A2.

[0031] Thus, when the side member 2 collides with the first area A1 of the housing 40 (cover 45), the stress in the first area A1 can be reduced, and the occurrence of damage to the cover 45 in the first area A1 can be well suppressed. As a result, the strength of the housing 40 of the transaxle 20 including the motor generator MG1 and mounted on the vehicle 1 can be further improved. Furthermore, since the strength of the housing 40 is improved, the protective cover that suppresses direct interference between the housing 40 and the side member 2 can be omitted, and therefore the cost of the transaxle 20 and the vehicle 1 can be reduced.

[0032] In addition, in the transmission axle 20, the connecting rib 457 is formed in a ring-shaped extension in the portion included in the second area A2 of the cover 45, and a plurality of radial ribs 455 (455a, 455b) extend outward from the outer peripheral surface of the connecting rib 457. Thus, so-called thinning is performed on the periphery (inner side) of the connecting rib 457, and when the cover 45 including the plurality of radial ribs 455 and the connecting rib 457 is manufactured by casting, the occurrence of casting pores or unsolidified portions can be well suppressed. However, if the connecting rib 457 is combined with the center side end of the plurality of radial ribs 455, it does not necessarily need to be an annular protrusion. That is, when viewed from the width direction of the vehicle, the connecting rib 457 may also be a curved protrusion extending in an arc shape or a C shape and having two end portions.

[0033] Furthermore, in the transaxle 20, the cover 45 of the housing 40 includes a rotor accommodation chamber 450 that accommodates the inner rotor 51 and the outer rotor 52 of the oil pump 50, and the connecting ribs 457 are formed on the cover 45 in a manner that surrounds the rotor accommodation chamber 450 when viewed in the vehicle width direction. Thus, when the cover 45 including the plurality of radial ribs 455 and the connecting ribs 457 and functioning as a pump housing of the oil pump 50 is manufactured by casting, the generation of casting pores or unsolidified portions can be well suppressed.

[0034] In the transaxle 20, the connection rib 457 includes a plurality of support seats 458 formed so as to at least partially overlap with the outer ring OL of the bearing B1 pressed into the cylindrical portion 451 of the cover 45 when viewed in the vehicle width direction. Thus, when the bearing B1 is assembled to the housing 40, the outer ring OL of the bearing B1 can be easily and smoothly pressed into the cylindrical portion 451 of the cover 45 while supporting the support seats 458 of the connection rib 457 with a jig or the like.

[0035] Furthermore, in the transaxle 20, the connection rib 457 is formed on the cover 45 in such a manner that the axis of the rotor R1 of the motor generator MG1 passes through the inner side of the connection rib 457. Thus, the stress (load) transmitted to the connection rib 457 from the radial ribs 455a and 455b can be received by the support portion of the rotor R1 having high strength, that is, the cylindrical portion 451 holding the bearings B1 and B2 or a part of the second housing 42.

[0036] In addition, in the transmission axle 20, as long as at least a portion of the plurality of radial ribs 455 reaches the first area A1, the connecting rib 457 may be formed outside the second area A2 of the housing 40 (cover 45), or may be formed outside the first area A1 and the second area A2. Furthermore, in the transmission axle 20, the plurality of radial ribs 455 and the connecting rib 457 are formed on the outer surface of the cover 45 of the housing 40, but this is not limited to this. That is, for example, in the case where the cover is formed integrally with the second housing, the plurality of radial ribs 455 and the connecting rib 457 may also be formed on the outer surface included in the second area A2 of the housing. In addition, it goes without saying that the branch portion 456 may be omitted from the radial rib 455a depending on the strength required for the housing 40 (cover 45).

[0037] Furthermore, the transaxle 20 includes: a planetary gear 30, which is housed in a housing 40 and connected to the engine 10 of the vehicle 1, the rotor R1 of the motor generator MG1, and the drive shaft DS; and the motor generator MG2, which is housed in the housing 40 and connected to the drive shaft DS, but is not limited thereto. That is, the transaxle 20 may also be a drive device for a hybrid vehicle or an electric vehicle including a single motor generator. In addition, in the transaxle 20, the oil pump 50 may also include an inner rotor 51 and an outer rotor 52 outside the rotor housing chamber (recess) 450 housed in the cover 45. Furthermore, the oil pump 50 of the transaxle 20 is not limited to a gear pump, but may also be a vane pump including a pump rotor arranged in the above-mentioned rotor housing chamber 450 or the like.

[0038] As described above, the drive device of the present disclosure includes: an electric motor (MG1) including a stator (S1) and a rotor (R1), a housing (40, 45) accommodating the electric motor (MG1), and a drive shaft (DS) connected to a wheel (W), wherein the drive device is mounted on a vehicle (1) in such a manner that the housing (40, 45) partially overlaps with a side beam (2) when viewed in the vehicle width direction, wherein the housing (40, 45) includes: A plurality of radial ribs (455, 455a, 455b) and a connecting rib (457) protruding in the vehicle width direction and connected to the center side ends of the plurality of radial ribs (455, 455a, 455b), at least a portion (455a, 455b) of the plurality of radial ribs (455, 455a, 455b) reaches a first area (A1) of the shell (40, 45) that overlaps with the side beam (2) and does not overlap with the wheel (W) when viewed from the vehicle width direction.

[0039] When a vehicle including the drive device disclosed herein is subjected to a collision such as a front collision or a side collision, the side beam hits a portion contained in the first area of ​​the radial ribs connected to the connecting ribs. Thus, when the side beam hits the first area of ​​the shell, the stress applied to the radial ribs from the side beam can be released to the side of the connecting ribs with high strength, so that the stress in the first area can be reduced, and the occurrence of damage in the first area can be effectively suppressed. As a result, the strength of the shell of the drive device including the electric motor and mounted on the vehicle can be further improved. Moreover, since the protective cover that suppresses direct interference between the shell and the side beam can be omitted by improving the strength of the shell, the cost of the drive device and even the vehicle can also be reduced. In addition, the radial rib may also include a branch portion that branches out from the radial rib and crosses the second area to reach the first area.

[0040] In addition, the connecting rib (457) may be formed in an annular extension in an area other than the first area (A1) of the shell (40, 45), and the plurality of radial ribs (455, 455a, 455b) may extend outward from the outer peripheral surface of the connecting rib (457). Thus, when the side beam collides with the first area of ​​the shell (40), the occurrence of damage in the first area can be extremely suppressed, and so-called thinning is performed around the connecting rib, and when the cover including the plurality of radial ribs and the connecting rib is manufactured by casting, the occurrence of casting pores or unsolidified parts can be well suppressed.

[0041] Furthermore, the housing (40, 45) may also include a second area (A2) that does not overlap with the side beam (2) and the wheel (W) when viewed from the width direction of the vehicle, at least a portion of the connecting rib (457) may also be included in the second area (A2) of the housing (40, 45), and at least a portion (455a, 455b) of the plurality of radial ribs (455, 455a, 455b) may also cross the second area (A2) and reach the first area (A1). In such a drive device, the strength of the second area of ​​the housing that does not overlap with the side beam and the wheel can be well ensured. In addition, when the side beam collides with the first area of ​​the housing, the stress applied to the radial rib from the side beam can be released to the connecting rib, i.e., the second area. As a result, the strength of the housing of the drive device including the electric motor and mounted on the vehicle can be further improved.

[0042] Furthermore, the connecting rib (457) may be formed in the second region (A2) of the housing (40, 45) in such a manner that the axis of the rotor (R1) passes through the inner side of the connecting rib (457). Thus, the stress (load) transmitted to the connecting rib can be borne by the support portion of the rotor of the motor having high strength.

[0043] In addition, the drive device (20) may include a bearing (B1) including an outer ring (OL) pressed into the housing (40) and supporting the rotor (R1) of the motor (MG1) in a freely rotatable manner, and the connecting rib (457) may include a support seat (458) formed in a manner that at least partially overlaps with the outer ring (OL) of the bearing (B1) when viewed from the vehicle width direction. Thus, when the bearing is assembled to the housing, the outer ring of the bearing can be easily and smoothly pressed into the housing while supporting the support seat of the connecting rib using a jig or the like.

[0044] Furthermore, the housing (40) may include a housing body (41, 42) for accommodating the electric motor (MG1), and a cover (45) covering one end of the housing body (41, 42) in the vehicle width direction, and the plurality of radial ribs (455) and the connecting ribs (457) may be formed on the outer surface of the cover (45).

[0045] In addition, the drive device (20) may include an oil pump (50) having at least one pump rotor (51, 52), the cover (45) may include a recess (450) for accommodating the pump rotor (51, 52) of the oil pump (50), and the connecting rib (457) may be formed on the cover (45) in such a manner as to at least partially surround the recess (450) when viewed from the vehicle width direction. Thus, when a cover including a plurality of radial ribs and connecting ribs and also serving as a housing of the oil pump is manufactured by casting, the occurrence of casting pores or unsolidified portions can be well suppressed.

[0046] Furthermore, the drive device (20) may also include: a planetary gear (30) housed in the housing (40) and connected to the internal combustion engine (10) of the vehicle (1), the rotor (R1) of the motor (MG1) and the drive shaft (DS); and a second motor (MG2) housed in the housing (40) and connected to the drive shaft (DS), the rotor (R1) of the motor (MG1) may also be formed to be hollow, and the pump rotor (51) of the oil pump (50) may also be connected to the internal combustion engine (10) via a shaft (CS) passing through the rotor (R1) of the motor (MG1) and a rotating member (34) of the planetary gear (30).

[0047] Furthermore, it is self-evident that the invention disclosed herein is not limited by the above-mentioned embodiments, and various modifications can be made within the scope of the disclosure. Furthermore, the above-mentioned embodiments are, after all, a specific embodiment of the invention described in the Summary of the Invention section, and do not limit the elements of the invention described in the Summary of the Invention section.

[0048] Industrial Application

[0049] The invention disclosed herein can be utilized in the manufacturing industry of a drive device mounted on a vehicle, and the like.

Claims

1. A driving device, comprising: An electric motor, the electric motor comprising a stator and a rotor; a housing, the housing accommodating the electric motor; and a drive shaft connected to a wheel, wherein the housing is mounted on the vehicle in a manner that partially overlaps with the side beam when viewed from the vehicle width direction, wherein the drive device includes: a plurality of radial ribs, each of which protrudes in the vehicle width direction and is formed on the housing in a radially extending manner, wherein at least a portion of the plurality of radial ribs reaches a first region of the housing, the first region being a region that overlaps with the side member and does not overlap with the wheel when viewed from the vehicle width direction; and A connecting rib protrudes in the vehicle width direction and is formed on the housing in conjunction with center side ends of the plurality of radial ribs.

2. The driving device according to claim 1, wherein: The connecting rib is formed in an annular shape and extends in an area other than the first area of ​​the shell. The plurality of radial ribs extend outward from the outer circumferential surface of the connecting rib, respectively.

3. The driving device according to claim 1 or 2, wherein: The housing further includes a second region which does not overlap with the side beam and the wheel when viewed from the vehicle width direction. at least a portion of the connecting rib is contained in the second region of the housing, At least a portion of the plurality of radial ribs crosses the second region and reaches the first region.

4. The driving device according to claim 3, wherein: The connection rib is formed in the second region of the housing in such a manner that the axis of the rotor passes through an inner side of the connection rib.

5. The driving device according to any one of claims 1 to 4, wherein: A bearing is also included, the bearing including an outer ring pressed into the housing and rotatably supporting the rotor of the motor. The connecting rib includes a support seat formed so as to at least partially overlap with the outer ring of the bearing when viewed from the vehicle width direction.

6. The driving device according to any one of claims 1 to 5, wherein: The housing includes a housing body that accommodates the electric motor and a cover that covers one end of the housing body in the vehicle width direction. The plurality of radial ribs and the connecting ribs are formed on an outer surface of the cover.

7. The driving device according to claim 6, wherein: Also included is an oil pump having at least one pump rotor, The cover includes a recessed portion for accommodating the pump rotor of the oil pump, The connecting rib is formed on the cover so as to at least partially surround the recessed portion when viewed from the vehicle width direction.

8. The driving device according to claim 7, wherein: Also includes: a planetary gear housed in the housing and connected to the internal combustion engine of the vehicle, the rotor of the electric motor, and the drive shaft; as well as a second motor, the second motor being housed in the housing and connected to the drive shaft, The rotor of the motor is formed to be hollow. The pump rotor of the oil pump is connected to the internal combustion engine via a shaft penetrating through the rotor of the electric motor and a rotating member of the planetary gear.

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