Vehicle driving device

Abstract

A vehicle driving device that includes a rotary electrical machine that functions as a driving force source of a wheel along with an internal combustion engine; a transmission device that is disposed side by side with respect next to the rotary electrical machine in an axial direction, the axial direction being a direction in which a rotation axis center of the rotary electrical machine extends; a case including a first case section that accommodates the rotary electrical machine and a second case section that accommodates the transmission device; an inverter device that controls the rotary electrical machine; and a wiring member structure that connects the rotary electrical machine and the inverter device.

Description

BACKGROUND

The present disclosure relates to a vehicle driving device including a rotary electrical machine, and an inverter device for controlling the rotary electrical machine.

For example, a rotary electrical machine included in a driving device as a driving force source of a wheel or a kinetic energy regenerating device in a hybrid vehicle normally requires an inverter device configured with a switching element as a main body. The rotary electrical machine and the inverter device are electrically connected using a wiring a wheel Wshaftside by side withcenterelementcenter (first axis center X1) of the transmission device TM is defined based on the rotation axis center of the input shaft (transmission input shaft) of the transmission device TM. In this case, the phrase “the transmission device TM is coaxially disposed with the rotary electrical machine MG” means that the rotation axis center of the transmission input shaft coincides with the rotation axis center of the rotary electrical machine MG (rotor Ro), where the rotation axis center of the transmission output member may not coincides with the rotation axis center of the rotary electrical machine MG (rotor Ro).

(7) The embodiments disclosed in the present specification are illustrative in all respects regarding other configurations as well, and should be recognized that such embodiments do not limit the scope of the disclosure. Those skilled in the art should easily recognize that modifications can be appropriately made without departing from the scope of the disclosure. Therefore, other embodiments modified without departing from the scope of the disclosure are also included in the scope of the disclosure.

INDUSTRIAL APPLICABILITY

The present disclosure can be used, for example, in the driving device for the hybrid vehicle.

Claims

1. A vehicle driving device comprising:

a rotary electrical machine that functions as a driving force source of a wheel along with an internal combustion engine;, an axial direction being a direction in which a rotation axis of the rotary electrical machine extends;

a transmission device that is disposed side by side with respect to the rotary electrical machine in an axial direction, the axial direction being a direction in which a rotation axis center of the rotary electrical machine extends;

a case including a first case section that accommodates the rotary electrical machine and a second case section that accommodates the transmission device;

an inverter device that controls the rotary electrical machine; and

a wiring member structure that connects the rotary electrical machine and the inverter device; wherein

an oil-tight space, in which space is formed by the first case section and the second case section are communicated, is formed, the second case section being joined to a side opposite to the internal combustion engine side in the axial direction of the first case section such that oil can communicate between the first case section and the second case section;

the first case section has a first side facing the internal combustion engine in the axial direction and a second side opposite the first side, the second case section being joined to the second side of the first case section;

an inverter accommodation chamber that accommodates the inverter device is formed between the second case section and a cover member joined to along an outer peripheral wall of the second case section;

the rotary electrical machine is accommodated in the oil-tight space;

the wiring member is provided to pass the wiring structure includes a first member passing through the second case section so as to cross the inverter accommodation chamber and the oil-tight space; and

a seal member that seals between the second case section and the wiring member first member of the wiring structure is provided,

the case further includes an intermediate wall disposed between the rotary electrical machine and the transmission device in the axial direction;

the wiring structure includes a second member connected to the first member and extending through a through hole formed in the intermediate wall; and

the through hole is formed at a position overlapping the rotary electrical machine as viewed in the axial direction.

2. The vehicle driving device according to claim 1, wherein

the case further includes an intermediate wall disposed between the rotary electrical machine and the transmission device in the axial direction;

the wiring member is provided through a through hole formed in the intermediate wall in the oil-tight space; and

the through hole is formed at a position overlapping the rotary electrical machine as viewed in the axial direction.

3. The vehicle driving device according to claim 1, wherein

the rotary electrical machine includes a stator with a stator core and a coil disposed in the stator core;

the coil includes two coil end portions projecting from the both sides of the stator core in the axial direction; a first coil end portion on a first side of the stator core in the axial direction that faces the transmission device and a second coil end portion on a second side of the stator core opposite the first side of the stator core in the axial direction; and

a connection terminal of the coil with the wiring member second member of the wiring structure is provided on the first coil end portion on the transmission device side in the axial direction of the two coil end portions.

4. The vehicle driving device according to claim 2, wherein

the rotary electrical machine includes a stator with a stator core and a coil disposed in the stator core;

the coil includes two coil end portions projecting from the both sides of the stator core in the axial direction; and

a connection terminal of the coil with the wiring member is provided on the coil end portion on the transmission device side in the axial direction of the two coil end portions.