Vehicle drive device

Abstract

The present application relates to a drive device for a vehicle. A rotation sensor (61) is connected to a control unit (INV) via a first signal line (S1) and detects rotation of a rotor (RT) of a rotary electric machine (MG), a temperature sensor (62) is connected to the control unit (INV) via a second signal line (S2) and detects temperature of a stator (ST) of the rotary electric machine (MG), a housing (9) has a first division portion (91) that divides a first accommodation chamber (A1) that accommodates the rotary electric machine (MG), an input member (1), a transmission gear mechanism (2), the rotation sensor (61), and the temperature sensor (62), and a second accommodation chamber (A2) that accommodates the control unit (INV), the first division portion (91) has a first communication portion (91b) that communicates the first accommodation chamber (A1) and the second accommodation chamber (A2), and the first signal line (S1) and the second signal line (S2) are arranged to pass through the first communication portion.

Description

TECHNICAL FIELD

[0001] The present application relates to a vehicle drive device provided with a rotary electric machine that functions as a driving source of a wheel, an input member that is drivingly linked to a rotor of the rotary electric machine, an output member that is drivingly linked to the wheel, a transmission gear mechanism that drivingly links the input member and the output member, a control unit that controls the rotary electric machine, a rotation sensor that detects rotation of the rotor of the rotary electric machine, a temperature sensor that detects a temperature of a stator of the rotary electric machine, and a housing that houses the rotary electric machine, the control unit, and the like. BACKGROUND

[0002] One example of such a vehicle drive device is disclosed in Patent Literature 1 described below. In the following description of the "BACKGROUND" and the "SUMMARY", the reference signs of Patent Literature 1 are cited in parentheses.

[0003] In the vehicle drive device of Patent Literature 1, the rotation sensor (30) that detects rotation of the rotor (21) of the rotary electric machine (20) and the temperature sensor that detects the temperature of the stator (22) of the rotary electric machine (20) are electrically connected to the control unit (44). Also, the control unit (44) controls the rotary electric machine (20) based on the detection signal of the rotation sensor (30) and the detection signal of the temperature sensor.

[0004] Patent Literature 1: International Publication No. 2019 / 208096

[0005] In the vehicle drive device of Patent Literature 1, the second housing (41) that houses the control unit (44) is fixed to the first housing (10) that houses the rotary electric machine (20), the rotation sensor (30), the temperature sensor, and the like. The first connector (51) having a terminal (70) that is electrically connected to the rotation sensor (30) and a terminal that is electrically connected to the temperature sensor is provided on the outer surface of the first housing (10). In addition, the second connector (52) having a terminal that is electrically connected to the control unit (44) is provided on the outer surface of the second housing (41). Also, the first connector (51) and the second connector (52) are connected by the electric cable (60), so that the rotation sensor (30) and the temperature sensor are electrically connected to the control unit (44).

[0006] In the above-described vehicle drive device, in order to electrically connect the rotation sensor (30) and the temperature sensor housed in the first housing (10) with the control unit (44) housed in the second housing (41), the first connector (51), the second connector (52), and the electric cable (60) are provided. Therefore, the number of components for electrically connecting the rotation sensor (30) and the temperature sensor with the control unit (44) increases. In addition, in the above-described vehicle drive device, since the first connector (51), the second connector (52), and the electric cable (60) are exposed outside the housings, each of the components needs a sealing structure for preventing water and the like from entering them. Thus, in the above-described vehicle drive device, the connection structure of the rotation sensor (30) and the temperature sensor with respect to the control unit (44) becomes complicated. SUMMARY

[0007] Therefore, it is desirable to achieve a vehicle drive device in which the connection structure of a rotation sensor and a temperature sensor with respect to a control unit is simple.

[0008] The vehicle drive device according to the above-described situation is characterized by the following aspects:

[0009] The vehicle drive device includes:

[0010] a rotary electric machine including a stator and a rotor, and functioning as a driving power source for a wheel;

[0011] an input member drivingly coupled to the rotor;

[0012] an output member drivingly coupled to the wheel;

[0013] a transmission gear mechanism drivingly coupling the input member to the output member;

[0014] a control unit that controls the rotary electric machine;

[0015] a rotation sensor connected to the control unit via a first signal line, and detecting a rotation of the rotor;

[0016] a temperature sensor connected to the control unit via a second signal line, and detecting a temperature of the stator; and

[0017] a housing that forms a first housing chamber in which the rotary electric machine, the input member, the transmission gear mechanism, the rotation sensor, and the temperature sensor are housed, and a second housing chamber in which the control unit is housed,

[0018] the housing includes a first partition that partitions the first housing chamber and the second housing chamber,

[0019] The first division portion has a first communication portion that communicates the first housing chamber and the second housing chamber.

[0020] The first signal line and the second signal line are configured to pass through the first communication portion.

[0021] According to this feature, the first division portion that divides the first housing chamber in which the rotation sensor and the temperature sensor are housed and the second housing chamber in which the control unit is housed is provided with the first communication portion that communicates the first housing chamber and the second housing chamber. Further, the first signal line that connects the rotation sensor and the control unit and the second signal line that connects the temperature sensor and the control unit are configured to pass through the first communication portion. In this way, the first signal line and the second signal line are configured to pass through the first communication portion of the first division portion that is disposed inside the housing, from the first housing chamber to the second housing chamber. Therefore, the first signal line and the second signal line can be appropriately disposed in the housing without providing a connector that is exposed to the outside and an external cable or the like that is connected to the connector. Therefore, the number of components for electrically connecting the rotation sensor and the temperature sensor and the control unit can be reduced.

[0022] Further, according to the above feature, the first signal line and the second signal line can be disposed inside the housing without passing through the outside of the housing. Therefore, the number of sites of a sealing structure that prevents water or the like from intruding into the inside of the housing can be reduced.

[0023] As described above, according to the above feature, the connection structure of the rotation sensor and the temperature sensor with respect to the control unit can be simplified. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a cross-sectional view along the axial direction of the vehicle drive device of the embodiment.

[0025] Figure 2 is a schematic view of the vehicle drive device of the embodiment.

[0026] Figure 3 is a schematic view that shows the connection structure of each component of the vehicle drive device of the embodiment. DETAILED DESCRIPTION

[0027] Hereinafter, the vehicle drive device 100 of the embodiment will be described with reference to the drawings. As shown in Figs. 1 and 2, the vehicle drive device 100 has a rotary electric machine MG, a control unit INV, an input member 1, a transmission gear mechanism 2, an output member 3, and a housing 9. Figure 1 and Figure 2 As shown in Figs. 1 and 2, the vehicle drive device 100 has a rotary electric machine MG, a control unit INV, an input member 1, a transmission gear mechanism 2, an output member 3, and a housing 9.

[0028] In the following explanation, the direction along the rotation axis of the rotary electric machine MG, i.e., the first axis X1, is designated as "axial direction L". Furthermore, one side of axial direction L is designated as "axial first side L1", and the other side as "axial second side L2". Additionally, the direction orthogonal to the rotation axis of the rotating components such as the rotary electric machine MG is designated as "radial direction R" with each rotation axis as a reference. Moreover, when it is not necessary to distinguish which rotation axis is used as a reference, or when the reference is clearly defined, it is sometimes simply referred to as "radial direction R".

[0029] The housing 9 includes a first dividing portion 91 that divides the first storage chamber A1 and the second storage chamber A2. In this embodiment, the first dividing portion 91 is formed to extend along the axial direction L. Therefore, in this embodiment, the first storage chamber A1 and the second storage chamber A2 are arranged radially R. The first storage chamber A1 is a space formed inside the housing 9, which houses the rotary motor MG, the input component 1, and the transmission gear mechanism 2. The second storage chamber A2 is a space formed inside the housing 9, which houses the control unit INV.

[0030] In this embodiment, the housing 9 includes a second dividing portion 92 that divides the first storage chamber A1 into a rotary motor chamber A11 and a gear mechanism chamber A12. The rotary motor chamber A11 is a space for housing the rotary motor MG. The gear mechanism chamber A12 is a space for housing the transmission gear mechanism 2. In this embodiment, the gear mechanism chamber A12 is disposed on the first axial side L1 relative to the rotary motor chamber A11. That is, in this embodiment, the transmission gear mechanism 2 is disposed on the first axial side L1 relative to the rotary motor MG.

[0031] In this embodiment, the first storage chamber A1 is surrounded by a peripheral wall portion 93, a first side wall portion 94, and a second side wall portion 95. That is, in this embodiment, the space inside the housing 9 surrounded by the peripheral wall portion 93, the first side wall portion 94, and the second side wall portion 95 is formed as the first storage chamber A1.

[0032] The peripheral wall portion 93 is formed into a cylindrical shape having an axis along the axial direction L. The first side wall portion 94 is formed to close the opening on the first axial side L1 of the peripheral wall portion 93. The second side wall portion 95 is formed to close the opening on the second axial side L2 of the peripheral wall portion 93.

[0033] In this embodiment, the second dividing portion 92 is formed to divide the first storage chamber A1 along the axial direction L. That is, in this embodiment, the second dividing portion 92 is formed to extend radially R between the first sidewall portion 94 and the second sidewall portion 95 along the axial direction L. Therefore, in this embodiment, a rotary motor chamber A11 is formed between the second dividing portion 92 and the second sidewall portion 95 of the first storage chamber A1 along the axial direction L. Furthermore, a gear mechanism chamber A12 is formed between the second dividing portion 92 and the first sidewall portion 94 of the first storage chamber A1 along the axial direction L. Figure 1 In the example shown, the second dividing part 92 is fixed to the peripheral wall part 93 by bolts.

[0034] In this embodiment, the second storage chamber A2 is enclosed by the third side wall portion 96 and the cover portion 97. That is, in this embodiment, the space inside the housing 9 enclosed by the third side wall portion 96 and the cover portion 97 is formed as the second storage chamber A2.

[0035] The third sidewall portion 96 is formed as a cylinder surrounding the side of the control unit INV. The third sidewall portion 96 extends radially R from the peripheral wall portion 93 to form an opening for the control unit INV to enter and exit relative to the second storage chamber A2. In this embodiment, the third sidewall portion 96 is formed to extend radially R... Figure 1 The direction (up and down) is a four-cornered cylindrical shape along the axis. Furthermore, it extends outwards towards the radial R ( Figure 1 An opening is formed on the upper side of the third side wall. The cover 97 is formed to close the opening of the third side wall 96.

[0036] Rotary motor MG as wheel W (reference) Figure 2 The rotary electric motor (MG) functions as a driving force source. It functions as both a motor (electric motor) that receives and generates power from an electrical supply, and a generator (generator) that receives and generates power from an electrical supply. Specifically, the rotary electric motor (MG) is electrically connected to an energy storage device (not shown) such as a battery or capacitor. Furthermore, the rotary electric motor (MG) generates driving force by operating with the electricity stored in the energy storage device. Additionally, the rotary electric motor (MG) generates electricity and charges the energy storage device using the driving force transmitted from the wheel W side.

[0037] The rotating electric machine MG has a stator ST and a rotor RT. The stator ST has a stator core STC fixed to a non-rotating component (here, housing 9). The rotor RT has a rotor core RTC supported relative to the stator ST and rotatable, and a rotor shaft RTS integrally rotatable with the rotor core RTC.

[0038] In this embodiment, the rotary motor MG is a rotary excitation type rotary motor. Therefore, stator coils are wound on the stator core STC. In this embodiment, the stator coils are wound on the stator core STC in such a way that a first coil end C1 protrudes axially to a first side L1 relative to the stator core STC, and a second coil end C2 protrudes axially to a second side L2 relative to the stator core STC. Furthermore, permanent magnets (not shown) are provided on the rotor core RTC.

[0039] Furthermore, in this embodiment, the rotary motor MG is an internal rotor type rotary motor. Therefore, the rotor core RTC is positioned radially inner than the stator core STC. Moreover, the rotor core RTC supports the rotor shaft RTS from radially outer side.

[0040] The rotor shaft RTS is formed to extend along the axial direction L. In this embodiment, the rotor shaft RTS is formed as a cylinder having an axis along the axial direction L. Furthermore, the rotor shaft RTS is supported by a first rotor bearing B11 and a second rotor bearing B12 disposed on a second axial side L2 further than the first rotor bearing B11, enabling it to rotate relative to the housing 9. Figure 1 In the example shown, the axial first side L1 end of the rotor shaft RTS is supported by a first rotor bearing B11, allowing it to rotate relative to the second dividing portion 92 of the housing 9. Furthermore, the axial second side L2 end of the rotor shaft RTS is supported by a second rotor bearing B12, allowing it to rotate relative to the second sidewall portion 95 of the housing 9. In this example, both the first rotor bearing B11 and the second rotor bearing B12 are ball bearings.

[0041] The input component 1 is driven and connected to the rotor RT of the rotary electric motor MG. In this embodiment, the input component 1 includes an input gear 11 and an input shaft 12.

[0042] Here, in this application, "drive connection" refers to a state in which two rotating components are connected in a manner capable of transmitting driving force, including a state in which the two rotating components are connected in a manner that allows them to rotate as a whole, or a state in which the two rotating components are connected via one or more transmission components capable of transmitting driving force. Such transmission components include various components that transmit rotation at the same speed or at varying speeds, such as shafts, gear mechanisms, belts, chains, etc. In addition, transmission components may also include engagement devices that selectively transmit rotation and driving force, such as friction engagement devices, meshing engagement devices, etc.

[0043] The input gear 11 is connected to the input shaft 12 in a rotatable manner. Figure 1 In the example shown, the input gear 11 is integrally formed with the input shaft 12. In this embodiment, the input gear 11 is disposed between a first input bearing B21 and a second input bearing B22 in the axial direction L.

[0044] The input shaft 12 is formed to extend along the axial direction L. In this embodiment, the input shaft 12 passes through the second dividing portion 92 of the housing 9 along the axial direction L and is disposed throughout the rotary motor chamber A11 and the gear mechanism chamber A12. Moreover, the input shaft 12 is coaxially disposed with the rotor shaft RTS of the rotary motor MG and is connected to the rotor shaft RTS in a manner that allows it to rotate integrally within the rotary motor chamber A11. Figure 1 In the example shown, the portion of the input shaft 12 that protrudes further axially from the second dividing section 92 towards the second side L2 is positioned inside the rotor shaft RS that protrudes further axially from the first side L1 from the rotor core RTC. Furthermore, these portions are interconnected by spline engagement in a manner that allows them to rotate as a single unit.

[0045] The transmission gear mechanism 2 drives and connects the input component 1 and the output component 3. That is, the transmission gear mechanism 2 transmits the rotation from the input component 1 to the output component 3. In this embodiment, the transmission gear mechanism 2 includes a reversing gear mechanism 4 and a differential gear mechanism 5.

[0046] The reversing gear mechanism 4 is disposed on a second shaft X2, which is different from the first shaft X1. The second shaft X2 is the rotation axis of the reversing gear mechanism 4. In this embodiment, the second shaft X2 is parallel to the first shaft X1. That is, in this embodiment, the second shaft X2 is disposed along the axial direction L.

[0047] The reversing gear mechanism 4 includes: a reversing input gear 41 that meshes with the input gear 11, a reversing output gear 42 that rotates integrally with the reversing input gear 41, and a countershaft 43 that connects the reversing input gear 41 and the reversing output gear 42.

[0048] The reverse input gear 41 and the reverse output gear 42 are each connected to the countershaft 43 in a manner that they rotate as a single unit. Figure 1 In the example shown, the reverse input gear 41 is connected to the countershaft 43 via a spline engagement. Furthermore, the reverse output gear 42 is integrally formed with the countershaft 43. Additionally, the reverse output gear 42 is formed with a smaller diameter than the reverse input gear 41.

[0049] The secondary shaft 43 is formed to extend along the second axis X2. In this embodiment, the secondary shaft 43 is supported by a first secondary bearing B31 and a second secondary bearing B32 disposed on a second axial side L2 relative to the first secondary bearing B31, enabling it to rotate relative to the housing 9. Figure 1In the example shown, the axial first side L1 end of the secondary shaft 43 is supported by a first secondary bearing B31, allowing it to rotate relative to the first sidewall portion 94 of the housing 9. Furthermore, the axial second side L2 end of the secondary shaft 43 is supported by a second secondary bearing B32, allowing it to rotate relative to the second dividing portion 92 of the housing 9. In this example, both the first secondary bearing B31 and the second secondary bearing B32 are tapered roller bearings.

[0050] The differential gear mechanism 5 is configured to distribute the rotation transmitted from the reversing gear mechanism 4 to a pair of output components 3. In this embodiment, the differential gear mechanism 5 includes a differential input gear 51 that meshes with the reverse output gear 42 of the reversing gear mechanism 4. Therefore, in this embodiment, the differential gear mechanism 5 distributes the rotation of the differential input gear 51 to a pair of output components 3.

[0051] The differential input gear 51 is disposed on a third shaft X3, which is different from the first shaft X1 and the second shaft X2. The third shaft X3 is the rotation axis of the differential input gear 51. In this embodiment, the third shaft X3 is disposed parallel to both the first shaft X1 and the second shaft X2. That is, in this embodiment, the third shaft X3 is disposed along the axial direction L.

[0052] In this embodiment, the differential gear mechanism 5 further includes a differential housing 52, a pair of pinions 53, a first side gear 54, and a second side gear 55. Here, the pair of pinions 53, the first side gear 54, and the second side gear 55 are all bevel gears.

[0053] The differential housing 52 is a hollow component that houses a pair of pinions 53, a first side gear 54, and a second side gear 55. The differential housing 52 is integrally rotatably connected to the differential input gear 51. Figure 1 In the example shown, the differential input gear 51 is fastened to the differential housing 52 by bolts.

[0054] In this embodiment, the differential housing 52 is supported by a first differential bearing B41 and a second differential bearing B42 located axially on a second side L2 relative to the first differential bearing B41, allowing it to rotate relative to the housing 9. Figure 1 In the example shown, the axial first side L1 end of the differential housing 52 is supported by a first differential bearing B41, allowing it to rotate relative to the first sidewall 94 of the housing 9. Furthermore, the axial second side L2 end of the differential housing 52 is supported by a second differential bearing B42, allowing it to rotate relative to the second dividing portion 92 of the housing 9. In this example, both the first differential bearing B41 and the second differential bearing B42 are tapered roller bearings.

[0055] A pair of pinions 53 are configured to face each other at a radial distance R with the third axis X3 as a reference. Furthermore, the pair of pinions 53 are mounted on a pinion shaft 56 supported and rotated integrally with the differential housing 52. Each of the pair of pinions 53 is configured to be able to rotate (rotate) about the pinion shaft 56 and to rotate (revolve) about the third axis X3.

[0056] A first side gear 54 and a second side gear 55 mesh with a pair of pinions 53. The first side gear 54 and the second side gear 55 are configured to rotate about a third axis X3. The first side gear 54 and the second side gear 55 are configured to be spaced apart from each other along the axial direction L and sandwich the pinion shaft 56. The first side gear 54 is positioned on the first side L1 axially closer than the second side gear 55.

[0057] Output component 3 and wheel W (refer to) Figure 2 Drive connection. In this embodiment, a pair of output components 3 are arranged on the third shaft X3 with a distance between them along the axial direction L. In addition, in this embodiment, the pair of output components 3 are housed in the gear mechanism chamber A12. In the following description, among the pair of output components 3, the output component 3 on the first axial side L1 is designated as "first output component 31", and the output component 3 on the second axial side L2 is designated as "second output component 32".

[0058] In this embodiment, the first output component 31 is connected to the first side gear 54 in a rotatable manner. Figure 1 In the example shown, the first output component 31 is integrally formed with the first side gear 54. Furthermore, in this embodiment, the first output component 31 is integrally rotatably connected to the drive shaft DS on the first side L1. Figure 1 In the example shown, the first output component 31 is formed as a cylinder with an axis along the axial direction L, and is disposed on the inner side of the radial direction R relative to the first side gear 54. Moreover, the drive shaft DS is inserted into the inner side of the radial direction R from the first side L1 relative to the first output component 31, and they are connected to each other by spline engagement.

[0059] In this embodiment, the second output component 32 is connected to the second side gear 55 in a rotatable manner. Figure 1 In the example shown, the second output component 32 is integrally formed with the second side gear 55. Furthermore, in this embodiment, the second output component 32 is rotatably connected to the drive shaft DS of the axial second side L2 via the transmission shaft 32a. Figure 1In the example shown, the second output component 32 is formed as a cylinder with an axis along the axial direction L, and is disposed on the inner side of the radial direction R relative to the second side gear 55. Moreover, the drive shaft 32a is inserted into the inner side of the radial direction R from the second side L2 relative to the second output component 32, and they are connected to each other by spline engagement.

[0060] The drive shaft 32a is a shaft component with the third shaft X3 as its rotation axis. In this embodiment, the drive shaft 32a is arranged to pass through the second division 92 of the housing 9 along the axial direction L, extending throughout the rotary motor chamber A11 and the gear mechanism chamber A12. Furthermore, the drive shaft 32a is integrally rotatably connected to the drive shaft DS on the second axial side L2. Figure 1 In the example shown, the portion of the drive shaft 32a from the end face of the second axial side L2 to the center of the axial direction L2 is formed into a cylindrical shape with an opening on the second axial side L2. Moreover, the drive shaft DS is inserted into the inner side of the radial direction R from the second axial side L2 relative to this cylindrical portion of the drive shaft 32a, and they are connected to each other by spline engagement.

[0061] In this embodiment, the drive shaft 32a is supported by the output bearing B5 so that it can rotate relative to the housing 9. Figure 1 In the example shown, the end of the second axial side L2 of the drive shaft 32a is supported by the output bearing B5 so that it can rotate relative to the second sidewall 95 of the housing 9.

[0062] The control unit INV is configured to control the rotating electric motor MG. In this embodiment, the control unit INV includes an inverter device. This inverter device is electrically connected to the aforementioned energy storage device and the rotating electric motor MG, and is a device for converting power between the DC of the energy storage device and the multi-phase (here, three-phase) AC of the rotating electric motor MG. In this example, the control unit INV also includes a smoothing capacitor for smoothing the voltage on the DC power supply side of the inverter device, and a control board for controlling the inverter circuit in the inverter device.

[0063] The first dividing portion 91 of the housing 9 includes a second connecting portion 91a. The second connecting portion 91a is formed to connect the first storage chamber A1 and the second storage chamber A2. In this embodiment, the second connecting portion 91a is a through hole formed to connect the rotary motor chamber A11 and the second storage chamber A2.

[0064] In this embodiment, the control unit INV is electrically connected to the second coil end C2 of the rotary motor MG via a conductive member 10a. The conductive member 10a is configured to pass through a second connecting portion 91a. That is, the conductive member 10a is configured to pass through the first dividing portion 91 of the housing 9 and extend throughout the second storage chamber A2 and the first storage chamber A1 (here, the rotary motor chamber A11). In this embodiment, the conductive member 10a is supported by the first dividing portion 91 via an electrically insulating member 10b. The insulating member 10b is inserted into the second connecting portion 91a. A sealing member 10c is provided between the insulating member 10b and the second connecting portion 91a. The sealing member 10c is an oil-tight seal between the insulating member 10b and the second connecting portion 91a (e.g., an O-ring).

[0065] like Figure 1 as well as Figure 3 As shown, the vehicle drive unit 100 includes a rotation sensor 61 and a temperature sensor 62. In this embodiment, the vehicle drive unit 100 also includes an oil temperature sensor 63 and a hydraulic pump 7. The rotation sensor 61, temperature sensor 62, oil temperature sensor 63, and hydraulic pump 7 are housed in a first housing chamber A1. In this embodiment, the rotation sensor 61, temperature sensor 62, oil temperature sensor 63, and hydraulic pump 7 are housed in a rotary motor chamber A11.

[0066] Rotation sensor 61 is a sensor that detects the rotation of the rotor RT of the rotary motor MG. For example... Figure 1 As shown, in this embodiment, the rotation sensor 61 is disposed on the second axial side L2 relative to the rotor RT. In the illustrated example, the rotation sensor 61 is disposed on the inner side of the second coil end C2 of the stator ST in the radial direction R, and is disposed at a position that overlaps with the second coil end C2 when viewed radially along the radial direction R. Here, regarding the arrangement of the two components, "overlapping when viewed in a specific direction" means that when an imaginary line parallel to the line of sight is moved in directions orthogonal to the imaginary line, the area where the imaginary line intersects with both components exists at least in a portion.

[0067] In this embodiment, the rotary sensor 61 includes a fixed body 61a and a rotating body 61b. Each of the fixed body 61a and the rotating body 61b is formed in an annular shape with a first axis X1 as its axis. The fixed body 61a is fixed to the housing 9. In this embodiment, the fixed body 61a is supported on the second side wall 95 of the housing 9. The rotating body 61b is disposed radially R inside the fixed body 61a, opposite to it in the radial direction R. Furthermore, the rotating body 61b is integrally rotatably connected to the rotor RT. In this embodiment, the rotating body 61b is integrally rotatably connected to the rotor shaft RTS.

[0068] In this example, the rotation sensor 61 is configured as a resolver. Therefore, the rotation sensor 61 detects the phase of the AC voltage corresponding to the relative angle between the rotating body 61b and the fixed body 61a when the AC current passes through the coil provided on the fixed body 61a, and thus detects the rotational position of the rotor shaft RTS. Furthermore, the rotation sensor 61 is not limited to a resolver; for example, it can be configured using various sensors such as Hall element sensors, encoders, and magnetic rotation sensors.

[0069] Temperature sensor 62 is a sensor for detecting the temperature of the stator ST of the rotating electric machine MG. In this embodiment, temperature sensor 62 is disposed at the end C2 of the second coil of the rotating electric machine MG. Furthermore, in this embodiment, temperature sensor 62 is composed of a thermistor. This thermistor includes an NTC thermistor with a negative temperature coefficient, whose resistance decreases as the temperature rises; and a PTC thermistor with a positive temperature coefficient, whose resistance increases as the temperature rises. Moreover, temperature sensor 62 is not limited to a thermistor; for example, it can be composed of a thermocouple.

[0070] The oil temperature sensor 63 is a sensor that detects the temperature of the oil inside the housing 9. In this embodiment, the oil temperature sensor 63 is supported on the second sidewall portion 95 to detect the temperature of the oil flowing in the oil passage P formed in the second sidewall portion 95 of the housing 9. In this example, the oil temperature sensor 63 is disposed downstream of an oil cooler (not shown) that cools the oil discharged from the hydraulic pump 7. That is, in this example, the oil temperature sensor 63 detects the temperature of the oil cooled by the oil cooler from the hydraulic pump 7.

[0071] The hydraulic pump 7 is a pump that supplies oil to at least the rotating electric motor MG. Specifically, the hydraulic pump 7 supplies cooling oil to the stator ST and rotor RT of the rotating electric motor MG. In this embodiment, the hydraulic pump 7 also supplies oil to the bearings that support the rotor shaft RTS for rotation, the bearings that support the shafts of the input component 1 and the transmission gear mechanism 2 for rotation, and the meshing parts of the gears. The hydraulic pump 7 is an electric hydraulic pump driven by an electric motor (not shown). The hydraulic pump 7 is fixed to the housing 9.

[0072] like Figure 3 As shown, the rotation sensor 61 is connected to the control unit INV via the first signal line S1. The temperature sensor 62 is connected to the control unit INV via the second signal line S2. The oil temperature sensor 63 is connected to the control unit INV via the third signal line S3. The hydraulic pump 7 is connected to the control unit INV via the fourth signal line S4. Based on the detection signals from the rotation sensor 61, the temperature sensor 62, and the oil temperature sensor 63, the control unit INV controls the rotary motor MG and the hydraulic pump 7 (here, the motor that drives the hydraulic pump 7).

[0073] The first dividing portion 91 of the housing 9 includes a first connecting portion 91b. The first connecting portion 91b is formed to connect the first storage chamber A1 and the second storage chamber A2. In this embodiment, the first connecting portion 91b is a through hole formed to connect the rotary motor chamber A11 and the second storage chamber A2. In this example, the first connecting portion 91b is formed at one position of the first dividing portion 91.

[0074] The first signal line S1 and the second signal line S2 are configured to pass through the first connecting portion 91b. In this embodiment, the third signal line S3 and the fourth signal line S4 are also configured to pass through the first connecting portion 91b.

[0075] In this embodiment, the first connecting portion 91b is disposed on the first axial side L1 relative to the center of the axial direction L of the rotary motor MG. Furthermore, the second connecting portion 91a is disposed on the second axial side L2 relative to the center of the axial direction L of the rotary motor MG.

[0076] Thus, in this embodiment, the stator ST includes a stator core STC and a second coil end C2 that protrudes axially to a second side L2 relative to the stator core STC.

[0077] The control unit INV is electrically connected to the end of the second coil C2 via a conductive component 10a.

[0078] The first dividing section 91 further includes a second connecting section 91a that connects the first storage chamber A1 and the second storage chamber A2.

[0079] The conductive component 10a is configured to pass through the second connecting portion 91a.

[0080] The first connecting portion 91b is disposed on the first axial side L1 relative to the central portion of the axial direction L of the rotary motor MG.

[0081] The second connecting portion 91a is disposed on the second axial side L2 relative to the central portion of the axial direction L of the rotary motor MG.

[0082] According to this structure, the first connecting portion 91b, through which the first signal line S1 and the second signal line S2 are inserted, and the second connecting portion 91a, through which the conductive member 10a is inserted, are separated along the axial direction L. This easily ensures the insulation between the first signal line S1 and the second signal line S2 and the conductive member 10a.

[0083] Furthermore, in this embodiment, the housing 9 includes a second dividing section 92 that divides the first storage chamber A1 into a rotary motor chamber A11 for storing the rotary motor MG, the rotary sensor 61, and the temperature sensor 62; and a gear mechanism chamber A12 for storing the transmission gear mechanism 2.

[0084] The first connecting portion 91b is formed to connect the rotary motor chamber A11 and the second storage chamber A2.

[0085] According to this structure, the rotary sensor 61 and the temperature sensor 62, both electrically connected to the control unit INV, are disposed in the rotary motor chamber A11. Furthermore, the first signal line S1 connecting the rotary sensor 61 to the control unit INV and the second signal line S2 connecting the temperature sensor 62 to the control unit INV are configured via a first connecting portion 91b that connects the rotary motor chamber A11 to the second receiving chamber A2. Thus, the first signal line S1 and the second signal line S2 can electrically connect the rotary sensor 61 and the temperature sensor 62 to the control unit INV without passing through the gear mechanism chamber A12. Therefore, compared to a structure where the first connecting portion 91b connects the gear mechanism chamber A12 and the second receiving chamber A2, the connection structure of the rotary sensor 61 and the temperature sensor 62 relative to the control unit INV can be simplified.

[0086] Furthermore, according to this structure, the first connecting portion 91b is formed to connect the rotary motor chamber A11 and the second receiving chamber A2. Here, less oil is splashed out as the rotor RT of the rotary motor MG housed in the rotary motor chamber A11 rotates. In contrast, more oil is splashed out as the components of the transmission gear mechanism 2 housed in the gear mechanism chamber A12 rotate. Therefore, according to this structure, compared to the structure in which the first connecting portion 91b is formed to connect the gear mechanism chamber A12 and the second receiving chamber A2, the necessity of providing components for preventing oil from penetrating the first connecting portion 91b can be reduced.

[0087] Furthermore, in this embodiment, in the structure where the housing 9 has a second dividing portion 92,

[0088] The vehicle drive unit 100 also features:

[0089] Oil temperature sensor 63, which is connected to control unit INV via third signal line S3, detects the temperature of the oil inside housing 9; and

[0090] Hydraulic pump 7, which is connected to control unit INV via fourth signal line S4, supplies oil to at least the rotary motor MG.

[0091] The oil temperature sensor 63 and the hydraulic pump 7 are housed in the rotary motor compartment A11.

[0092] The third signal line S3 and the fourth signal line S4 are configured to pass through the first connecting portion 91b.

[0093] According to this structure, in addition to the first signal line S1 and the second signal line S2, the third signal line S3 and the fourth signal line S4 are also arranged through the first connecting portion 91b of the first dividing portion 91 disposed inside the housing 9 and extending throughout the rotary motor chamber A11 and the second housing chamber A2. Furthermore, in addition to the rotation sensor 61 and the temperature sensor 62, the oil temperature sensor 63 and the hydraulic pump 7 are also housed in the rotary motor chamber A11. Therefore, the connection structure of the rotation sensor 61, the temperature sensor 62, the oil temperature sensor 63, and the hydraulic pump 7 relative to the control unit INV can be simplified.

[0094] Furthermore, in this embodiment, the transmission gear mechanism 2 is positioned on the first axial side L1 relative to the rotary motor MG.

[0095] Rotation sensor 61 is positioned on the second axial side L2 relative to rotor RT.

[0096] The stator ST has a stator core STC and a second coil end C2 that protrudes axially to a second side L2 relative to the stator core STC.

[0097] Temperature sensor 62 is disposed at the end of the second coil C2.

[0098] According to this structure, the rotation sensor 61 and the temperature sensor 62, which are electrically connected to the control unit INV, can be positioned close to the second axial side L2. This facilitates the centralized arrangement of the first signal line S1 connecting the rotation sensor 61 to the control unit INV and the second signal line S2 connecting the temperature sensor 62 to the control unit INV. Therefore, the connection configuration of the rotation sensor 61 and the temperature sensor 62 relative to the control unit INV can be further simplified.

[0099] like Figure 1 As shown, in this embodiment, the vehicle drive unit 100 further includes a closing member 81 and a sealing member 82. The closing member 81 is a member housed in the first connecting portion 91b in a manner that blocks the first connecting portion 91b. The sealing member 82 is a member (e.g., an O-ring) that seals the space between the closing member 81 and the first connecting portion 91b in an oil-tight manner. In this embodiment, the sealing member 82 is disposed between the inner surface of the first dividing portion 91, which constitutes a through hole in the first connecting portion 91b, and the outer surface of the closing member 81.

[0100] like Figure 3 As shown, in this embodiment, the first signal line S1 and the second signal line S2 are configured to pass through the interior of the enclosed member 81. In this example, the third signal line S3 and the fourth signal line S4 are also configured to pass through the interior of the enclosed member 81.

[0101] Thus, in this embodiment, the vehicle drive unit 100 further includes a sealing member 81 housed in the first connecting portion 91b to block it, and a sealing member 82 that seals the space between the sealing member 81 and the first connecting portion 91b with an oil-tight seal.

[0102] The first signal line S1 and the second signal line S2 are configured to pass through the interior of the enclosed component 81.

[0103] According to this structure, the rotation sensor 61 and the temperature sensor 62 can be properly connected to the control unit INV by means of the first signal line S1 and the second signal line S2 inside the closed component 81, and by means of the sealing component 82 between the closed component 81 and the first connecting part 91b in an oil-tight manner, oil can be prevented from entering the second storage chamber A2 containing the control unit INV from the first storage chamber A1 containing the rotary motor MG and the transmission gear mechanism 2.

[0104] In this example, the enclosure 81 is a connector mounted on the end of the first wiring harness WH1. The first wiring harness WH1 is a component that integrally connects the wiring connected to the rotation sensor 61 and forming part of the first signal line S1, the wiring connected to the temperature sensor 62 and forming part of the second signal line S2, the wiring connected to the oil temperature sensor 63 and forming part of the third signal line S3, and the wiring connected to the hydraulic pump 7 and forming part of the fourth signal line S4.

[0105] Furthermore, in this example, the connecting member 83 is detachably disposed on the enclosed member 81. The connecting member 83 is a connector mounted on the end of the second wire harness WH2. The second wire harness WH2 is a component that integrally connects the wiring connected to the control unit INV and forming part of the first signal line S1, the wiring connected to the control unit INV and forming part of the second signal line S2, the wiring connected to the control unit INV and forming part of the third signal line S3, and the wiring connected to the control unit INV and forming part of the fourth signal line S4. In this example, by connecting the connecting member 83 to the enclosed member 81, the first signal line S1, the second signal line S2, the third signal line S3, and the fourth signal line S4 are formed continuously.

[0106] [Other Implementation Methods]

[0107] (1) In the above embodiment, the structure in which the first signal line S1 to the fourth signal line S4 are configured to pass through a through hole, i.e., a first connecting portion 91b, formed in the first dividing portion 91 of the housing 9 is described as an example. However, the structure is not limited to that. For example, it may be configured such that two through holes are formed in the first dividing portion 91 as the first connecting portion 91b, the first signal line S1 and the second signal line S2 are configured to pass through one of the through holes, and the third signal line S3 and the fourth signal line S4 are configured to pass through the other through hole. Alternatively, it may be configured such that four through holes are formed in the first dividing portion 91 as the first connecting portion 91b, and the first signal line S1 to the fourth signal line S4 are configured to pass through the four through holes respectively.

[0108] (2) In the above embodiment, the structure described is exemplified by a connector that can be connected to the connecting member 83, where the state with the first signal lines S1 to S4 formed and the state without the first signal lines S1 to S4 formed are switched by attaching and detaching the connecting member 83 relative to the closing member 81. However, the structure is not limited to that. The closing member 81 may not be a connector, but may be a member that blocks the first connecting portion 91b and maintains the wiring of the first signal lines S1 to S4. In this structure, the first signal lines S1 to S4 are held by the closing member 81 in a state where they continuously pass through the closing member 81.

[0109] (3) In the above embodiment, the first connecting portion 91b is described as a structure that connects the rotary motor chamber A11 and the second storage chamber A2. However, it is not limited to that structure, and the first connecting portion 91b may also be formed to connect the gear mechanism chamber A12 and the second storage chamber A2.

[0110] (4) In the above embodiment, the structure of the transmission gear mechanism 2 disposed on the first axial side L1 relative to the rotary motor MG, the rotation sensor 61 disposed on the second axial side L2 relative to the rotor RT, and the temperature sensor 62 disposed relative to the end of the second coil C2 was described as an example. However, it is not limited to that structure. For example, the rotation sensor 61 may also be disposed on the first axial side L1 relative to the rotor RT. In addition, the temperature sensor 62 may also be disposed on the end of the first coil C1.

[0111] (5) In the above embodiment, although the structure of the housing 9 having a second dividing part 92 that divides the first storage chamber A1 into a rotary motor chamber A11 and a gear mechanism chamber A12 has been described as an example, it is not limited to that structure. For example, the housing 9 may also lack the second dividing part 92, and the rotary motor MG and the transmission gear mechanism 2 may be stored in a continuous first storage chamber A1. Alternatively, the housing 9 may have other dividing parts besides the second dividing part 92, dividing the first storage chamber A1 into three or more spaces.

[0112] (6) In the above embodiment, although the vehicle drive unit 100 is described as having an oil temperature sensor 63 and a third signal line S3 connecting the oil temperature sensor 63 to the control unit INV, and a hydraulic pump 7 and a fourth signal line S4 connecting the hydraulic pump 7 to the control unit INV, the structure is not limited to that. For example, the vehicle drive unit 100 may also be structured without the oil temperature sensor 63 and at least one of the third signal line S3 and the hydraulic pump 7 and the fourth signal line S4. In addition, even if it is included, at least one of the third signal line S3 and the fourth signal line S4 may be configured not to pass through the first connecting portion 91b.

[0113] (7) In the above embodiment, although the vehicle drive unit 100 is described as having a structure in which a sealing member 81 is housed in the first connecting portion 91b in a manner that blocks the first connecting portion 91b, and a sealing member 82 that seals the space between the sealing member 81 and the first connecting portion 91b in an oil-tight manner, the structure is not limited to that. For example, it is also possible to configure a structure in which the sealing member 81 is not provided in the first connecting portion 91b, and the space between the first signal line S1 and the second signal line S2 and the first connecting portion 91b is sealed in an oil-tight manner only by the sealing member 82. Alternatively, it is also possible to configure a structure in which neither the sealing member 81 nor the sealing member 82 is provided in the first connecting portion 91b.

[0114] (8) In the above embodiment, the structure in which the first connecting portion 91b is disposed on the first axial side L1 relative to the center of the axial direction L of the rotary motor MG, and the second connecting portion 91a is disposed on the second axial side L2 relative to the center of the axial direction L of the rotary motor MG, has been described as an example. However, the structure is not limited to that. For example, both the first connecting portion 91b and the second connecting portion 91a may be disposed on the second axial side L2 relative to the center of the axial direction L of the rotary motor MG.

[0115] (9) Furthermore, the structures disclosed in the above embodiments can be combined with structures disclosed in other embodiments, provided that they do not create contradictions. Regarding other structures, the embodiments disclosed in this specification are merely simple examples in all respects. Therefore, various modifications can be appropriately made without departing from the spirit of the invention.

[0116] [Summary of the above implementation methods]

[0117] The following is a summary of the vehicle drive unit (100) described above.

[0118] The vehicle drive unit (100) includes:

[0119] A rotary electric motor (MG) has a stator (ST) and a rotor (RT) and functions as a driving force source for a wheel (W);

[0120] Input component (1), which is connected to the aforementioned rotor (RT) drive;

[0121] Output component (3), which is connected to the aforementioned wheel (W) drive;

[0122] The transmission gear mechanism (2) drives and connects the input component (1) and the output component (3);

[0123] The control unit (INV) controls the aforementioned rotary motor (MG);

[0124] A rotation sensor (61) is connected to the control unit (INV) via a first signal line (S1) and detects the rotation of the rotor (RT);

[0125] A temperature sensor (62), connected to the control unit (INV) via a second signal line (S2), detects the temperature of the stator (ST); and

[0126] The housing (9) has a first housing chamber (A1) for housing the rotary motor (MG), the input component (1), the transmission gear mechanism (2), the rotary sensor (61), and the temperature sensor (62), and a second housing chamber (A2) for housing the control unit (INV).

[0127] The aforementioned housing (9) includes a first dividing section (91) that divides the first storage chamber (A1) and the second storage chamber (A2).

[0128] The first dividing section (91) described above includes a first connecting section (91b) that connects the first storage compartment (A1) and the second storage compartment (A2).

[0129] The first signal line (S1) and the second signal line (S2) are configured to pass through the first connecting portion (91b).

[0130] According to this structure, a first connecting portion (91b) is provided in the first dividing section (91) that divides the first storage chamber (A1) housing the rotation sensor (61) and the temperature sensor (62) and the second storage chamber (A2) housing the control unit (INV), connecting the first storage chamber (A1) and the second storage chamber (A2). Furthermore, the first signal line (S1) connecting the rotation sensor (61) to the control unit (INV) and the second signal line (S2) connecting the temperature sensor (62) to the control unit (INV) are arranged to pass through the first connecting portion (91b). Thus, the first signal line (S1) and the second signal line (S2) are arranged from the first storage chamber (A1) to the second storage chamber (A2) through the first connecting portion (91b) of the first dividing section (91) disposed inside the housing (9). Therefore, by not providing an externally exposed connector and an external cable connected to the connector in the housing (9), the first signal line (S1) and the second signal line (S2) can be appropriately configured. This reduces the number of components required for electrically connecting the rotation sensor (61) and the temperature sensor (62) to the control unit (INV).

[0131] Furthermore, according to the above structure, the first signal line (S1) and the second signal line (S2) can be disposed inside the housing (9) without passing through the outside of the housing (9). Therefore, the number of parts requiring a sealing structure to prevent water or the like from entering the interior of the housing (9) can be reduced.

[0132] As described above, the connection between the rotation sensor (61) and the temperature sensor (62) and the control unit (INV) can be simplified according to the above structure.

[0133] Here, the direction along the rotation axis of the aforementioned rotary motor (MG) is defined as the axial direction (L), one side of the aforementioned axial direction (L) is defined as the first axial side (L1), and the other side of the aforementioned axial direction (L) is defined as the second axial side (L2). Preferably,

[0134] The stator (ST) described above includes: a stator core (STC) and a coil end (C2) protruding from the stator core (STC) toward the second axial side (L2).

[0135] The aforementioned control unit (INV) is electrically connected to the coil end (C2) via a conductive component (10a).

[0136] The first dividing section (91) further includes a second connecting section (91a) that connects the first storage chamber (A1) and the second storage chamber (A2).

[0137] The conductive component (10a) is configured to pass through the second connecting portion (91a).

[0138] The first connecting portion (91b) is disposed on the first side (L1) of the axial direction relative to the central portion of the rotary motor (MG) along the axial direction (L).

[0139] The second connecting portion (91a) is disposed on the second side (L2) of the axial direction relative to the central portion of the axial direction (L) of the rotary motor (MG).

[0140] According to this structure, the first connecting portion (91b) through which the first signal line (S1) and the second signal line (S2) are inserted, and the second connecting portion (91a) through which the conductive member (10a) is inserted are separated along the axial direction (L). As a result, the insulation between the first signal line (S1) and the second signal line (S2) and the conductive member (10a) can be easily ensured.

[0141] Furthermore, it is preferable that the housing (9) includes a second dividing section (92) that divides the first storage chamber (A1) into a rotary motor chamber (A11) for storing the rotary motor (MG), the rotary sensor (61), and the temperature sensor (62), and a gear mechanism chamber (A12) for storing the transmission gear mechanism (2).

[0142] The first connecting portion (91b) is configured to connect the rotary motor chamber (A11) and the second storage chamber (A2).

[0143] According to this structure, the rotation sensor (61) and the temperature sensor (62), which are electrically connected to the control unit (INV), are both disposed in the rotary motor chamber (A11). Furthermore, the first signal line (S1) connecting the rotation sensor (61) to the control unit (INV) and the second signal line (S2) connecting the temperature sensor (62) to the control unit (INV) are configured to pass through a first connecting portion (91b) formed in a manner that connects the rotary motor chamber (A11) to the second receiving chamber (A2). Thus, the first signal line (S1) and the second signal line (S2) can electrically connect the rotation sensor (61) and the temperature sensor (62) to the control unit (INV) without passing through the gear mechanism chamber (A12). Therefore, compared to a structure where the first connecting portion (91b) is formed to connect the gear mechanism chamber (A12) to the second receiving chamber (A2), the connection structure of the rotation sensor (61) and the temperature sensor (62) relative to the control unit (INV) can be simplified.

[0144] Furthermore, according to this structure, the first connecting portion (91b) is formed to connect the rotary motor chamber (A11) and the second receiving chamber (A2). Here, less oil is splashed out as the rotor (RT) of the rotary motor (MG) housed in the rotary motor chamber (A11) rotates. In contrast, more oil is splashed out as the components of the transmission gear mechanism (2) housed in the gear mechanism chamber (A12) rotate. Therefore, according to this structure, compared to the structure in which the first connecting portion (91b) is formed to connect the gear mechanism chamber (A12) and the second receiving chamber (A2), the necessity of providing components to prevent oil from easily penetrating the first connecting portion (91b) can be reduced.

[0145] In the structure where the aforementioned housing (9) has the aforementioned second division (92), it is preferable to

[0146] The vehicle drive unit (100) also features:

[0147] An oil temperature sensor (63), connected to the control unit (INV) via a third signal line (S3), detects the temperature of the oil inside the housing (9); and

[0148] The hydraulic pump (7), which is connected to the control unit (INV) via the fourth signal line (S4), supplies oil to at least the rotary motor (MG).

[0149] The aforementioned oil temperature sensor (63) and the aforementioned hydraulic pump (7) are housed in the aforementioned rotary motor chamber (A11).

[0150] The third signal line (S3) and the fourth signal line (S4) are configured to pass through the first connecting portion (91b).

[0151] According to this structure, in addition to the first signal line (S1) and the second signal line (S2), the third signal line (S3) and the fourth signal line (S4) are also arranged throughout the rotary motor chamber (A11) and the second housing chamber (A2) via the first connecting portion (91b) of the first dividing portion (91) disposed inside the housing (9). Moreover, in addition to the rotation sensor (61) and the temperature sensor (62), the oil temperature sensor (63) and the hydraulic pump (7) are also housed in the rotary motor chamber (A11). Therefore, the connection structure of the rotation sensor (61), the temperature sensor (62), the oil temperature sensor (63), and the hydraulic pump (7) relative to the control unit (INV) can be simplified.

[0152] Furthermore, it is preferable to define the direction along the rotation axis of the aforementioned rotary motor (MG) as the axial direction (L), designate one side of the aforementioned axial direction (L) as the first axial side (L1), and designate the other side of the aforementioned axial direction (L) as the second axial side (L2).

[0153] The aforementioned transmission gear mechanism (2) is positioned on the first axial side (L1) relative to the aforementioned rotary motor (MG).

[0154] The aforementioned rotation sensor (61) is disposed on the second axial side (L2) relative to the aforementioned rotor (RT).

[0155] The stator (ST) described above includes a stator core (STC) and a coil end (C2) that protrudes from the stator core (STC) toward the second axial side (L2).

[0156] The temperature sensor (62) is disposed at the end of the coil (C2).

[0157] According to this structure, the rotation sensor (61) and the temperature sensor (62), which are electrically connected to the control unit (INV), can be positioned close to the second axial side (L2). This facilitates the centralized arrangement of the first signal line (S1) connecting the rotation sensor (61) to the control unit (INV) and the second signal line (S2) connecting the temperature sensor (62) to the control unit (INV). Therefore, the connection configuration of the rotation sensor (61) and the temperature sensor (62) relative to the control unit (INV) can be further simplified.

[0158] Industrial applications

[0159] The technology of the present invention can be used in a vehicle drive device comprising: a rotary electric motor that functions as a driving force source for wheels, an input component that is driven and connected to the rotor of the rotary electric motor, an output component that is driven and connected to the wheels, a transmission gear mechanism that drives and connects the input component and the output component, a control unit for controlling the rotary electric motor, a rotation sensor for detecting the rotation of the rotor of the rotary electric motor, a temperature sensor for detecting the temperature of the stator of the rotary electric motor, and a housing for housing the rotary electric motor and the control unit, etc.

[0160] Explanation of reference numerals in the attached figures

[0161] 100: Vehicle drive unit; 1: Input component; 2: Transmission gear mechanism; 3: Output component; 4: Output component; 61: Rotation sensor; 62: Temperature sensor; 9: Housing; 91: First division section; 91b: First connecting section; A1: First storage chamber; A2: Second storage chamber; INV: Control unit; MG: Rotary motor; ST: Stator; RT: Rotor; S1: First signal line; S2: Second signal line; W: Wheel.

Claims

1. A vehicle drive system comprising: A rotating electric motor, which has a stator and a rotor, functions as a driving force source for wheels; The input component is connected to the aforementioned rotor drive; Output component, which is connected to the aforementioned wheel drive; A transmission gear mechanism that drives and connects the input component and the output component. The control unit controls the aforementioned rotary motor; A rotation sensor, which is connected to the control unit via a first signal line, detects the rotation of the rotor; A temperature sensor, connected to the control unit via a second signal line, detects the temperature of the stator; and The housing comprises a first housing chamber for housing the rotary motor, the input component, the transmission gear mechanism, the rotary sensor, and the temperature sensor, and a second housing chamber for housing the control unit. The aforementioned housing has a first dividing portion that separates the first storage compartment and the second storage compartment. The first division includes a first connecting portion that connects the first storage compartment and the second storage compartment, and a second connecting portion that connects the first storage compartment and the second storage compartment. The first signal line and the second signal line are configured to pass through the first connecting portion. The control unit is electrically connected to the stator via a conductive component, which is configured to pass through the second connecting portion.

2. The vehicle drive device according to claim 1, wherein, Let the direction along the rotation axis of the aforementioned rotary motor be defined as the axial direction, one side of the aforementioned axial direction be defined as the first axial side, and the other side of the aforementioned axial direction be defined as the second axial side. The stator described above includes a stator core and a coil end that protrudes axially to a second side relative to the stator core. The control unit is electrically connected to the end of the coil via a conductive component. The first connecting portion is disposed on the first side of the axial direction relative to the central portion of the rotary motor. The second connecting portion is disposed on the second side of the axial direction relative to the central portion of the axial direction of the rotary motor.

3. The vehicle drive device according to claim 1, wherein, The aforementioned housing includes: a second dividing section that divides the first storage chamber into a rotary motor chamber for storing the rotary motor, the rotary sensor, and the temperature sensor, and a gear mechanism chamber for storing the transmission gear mechanism. The first connecting portion is configured to connect the rotary motor chamber and the second storage chamber.

4. The vehicle drive unit according to claim 2, wherein, The aforementioned housing includes: a second dividing section that divides the first storage chamber into a rotary motor chamber for storing the rotary motor, the rotary sensor, and the temperature sensor, and a gear mechanism chamber for storing the transmission gear mechanism. The first connecting portion is configured to connect the rotary motor chamber and the second storage chamber.

5. The vehicle drive device according to claim 3, further comprising: An oil temperature sensor, connected to the control unit via a third signal line, detects the temperature of the oil inside the housing; and The hydraulic pump, which is connected to the control unit via the fourth signal line, supplies oil to at least the aforementioned rotary motor. The aforementioned oil temperature sensor and the aforementioned hydraulic pump are housed in the aforementioned rotary motor chamber. The aforementioned third signal line and the aforementioned fourth signal line are configured to pass through the aforementioned first connecting portion.

6. The vehicle drive device according to claim 4, further comprising: An oil temperature sensor, connected to the control unit via a third signal line, detects the temperature of the oil inside the housing; and The hydraulic pump, which is connected to the control unit via the fourth signal line, supplies oil to at least the aforementioned rotary motor. The aforementioned oil temperature sensor and the aforementioned hydraulic pump are housed in the aforementioned rotary motor chamber. The aforementioned third signal line and the aforementioned fourth signal line are configured to pass through the aforementioned first connecting portion.

7. The vehicle drive unit according to any one of claims 1 to 6, wherein, Let the direction along the rotation axis of the aforementioned rotary motor be defined as the axial direction, one side of the aforementioned axial direction be defined as the first axial side, and the other side of the aforementioned axial direction be defined as the second axial side. The aforementioned transmission gear mechanism is positioned on the first axial side relative to the aforementioned rotary motor. The aforementioned rotation sensor is configured on the second side of the aforementioned axial direction relative to the aforementioned rotor. The stator described above includes a stator core and a coil end that protrudes axially to a second side relative to the stator core. The temperature sensor is located at the end of the coil.

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