Vehicle drive device

Patent metadata

Field	Value
Publication number	US-2016185232-A1
Application number	US-201414780335-A
Country	US
Kind code	A1
Filing date	Mar 18, 2014
Priority date	May 31, 2013
Publication date	Jun 30, 2016
Grant date	—

Abstract

A vehicle drive device that includes a rotary electric machine that serves as a drive force source for wheels; a speed change mechanism; a pump motor that serves as a drive force source for an electric pump that generates a hydraulic pressure to be supplied to a servo mechanism for the speed change mechanism; a case that accommodates the speed change mechanism; and a first inverter that controls the rotary electric machine and a second inverter that controls the pump motor, the first inverter and the second inverter being connected to a common DC power source, wherein: the first inverter and the second inverter are disposed in the case; and a first wiring member that extends from the DC power source is branched in the case to be connected to each of the first inverter and the second inverter.

First claim

1 . A vehicle drive device comprising:
a rotary electric machine that serves as a drive force source for wheels; a speed change mechanism; a pump motor that serves as a drive force source for an electric pump that generates a hydraulic pressure to be supplied to a servo mechanism for the speed change mechanism; a case that accommodates the speed change mechanism; and a first inverter that controls the rotary electric machine and a second inverter that controls the pump motor, the first inverter and the second inverter being connected to a common DC power source, wherein:
the first inverter and the second inverter are disposed in the case; and
a first wiring member that extends from the DC power source is branched in the case to be connected to each of the first inverter and the second inverter.

2 . The vehicle drive device according to claim 1 , wherein:
the first inverter and the second inverter are disposed in a control element accommodation chamber formed in the case; and the first wiring member is branched in the control element accommodation chamber to be connected to each of the first inverter and the second inverter.

3 . The vehicle drive device according to claim 2 , wherein:
the rotary electric machine and the pump motor are accommodated in a drive element accommodation chamber formed in the case in an oil-tight manner; the drive element accommodation chamber and the control element accommodation chamber communicate with each other via a communication hole; and both a second wiring member that connects between the first inverter and the rotary electric machine and a third wiring member that connects between the second inverter and the pump motor pass through the communication hole.

4 . The vehicle drive device according to claim 3 , wherein:
the second wiring member includes a relay terminal disposed in the communication hole and a plurality of bus bars that connect between the first inverter and the relay terminal; and the plurality of bus bars and a substrate that constitutes the second inverter are integrally held by a holding member.

5 . The vehicle drive device according to claim 4 , wherein
in a vehicle mounted state, the communication hole is disposed above a surface of oil in the drive element accommodation chamber.

6 . The vehicle drive device according to claim 5 , further comprising:
a smoothing capacitor connected between the DC power source and the first inverter and the second inverter to smooth DC power to be supplied to both the first inverter and the second inverter, wherein the smoothing capacitor and the first inverter are disposed side by side, and the first inverter and the second inverter are disposed side by side.

7 . The vehicle drive device according to claim 6 , wherein:
the case includes a first case portion that accommodates the speed change mechanism and a second case portion that accommodates the rotary electric machine; and the electric pump and the pump motor are disposed in the first case portion, and a control element accommodation chamber that accommodates at least one of the first inverter and the second inverter is formed along an outer peripheral wall of the first case portion.

8 . The vehicle drive device according to claim 1 , further comprising:
a smoothing capacitor connected between the DC power source and the first inverter and the second inverter to smooth DC power to be supplied to both the first inverter and the second inverter, wherein the smoothing capacitor and the first inverter are disposed side by side, and the first inverter and the second inverter are disposed side by side.

9 . The vehicle drive device according to claim 1 , wherein:
the case includes a first case portion that accommodates the speed change mechanism and a second case portion that accommodates the rotary electric machine; and the electric pump and the pump motor are disposed in the first case portion, and a control element accommodation chamber that accommodates at least one of the first inverter and the second inverter is formed along an outer peripheral wall of the first case portion.

10 . The vehicle drive device according to claim 2 , further comprising:
a smoothing capacitor connected between the DC power source and the first inverter and the second inverter to smooth DC power to be supplied to both the first inverter and the second inverter, wherein the smoothing capacitor and the first inverter are disposed side by side, and the first inverter and the second inverter are disposed side by side.

11 . The vehicle drive device according to claim 2 , wherein:
the case includes a first case portion that accommodates the speed change mechanism and a second case portion that accommodates the rotary electric machine; and the electric pump and the pump motor are disposed in the first case portion, and a control element accommodation chamber that accommodates at least one of the first inverter and the second inverter is formed along an outer peripheral wall of the first case portion.

12 . The vehicle drive device according to claim 3 , wherein
in a vehicle mounted state, the communication hole is disposed above a surface of oil in the drive element accommodation chamber.

13 . The vehicle drive device according to claim 3 , further comprising:
a smoothing capacitor connected between the DC power source and the first inverter and the second inverter to smooth DC power to be supplied to both the first inverter and the second inverter, wherein the smoothing capacitor and the first inverter are disposed side by side, and the first inverter and the second inverter are disposed side by side.

14 . The vehicle drive device according to any one of claim 3 , wherein:
the case includes a first case portion that accommodates the speed change mechanism and a second case portion that accommodates the rotary electric machine; and the electric pump and the pump motor are disposed in the first case portion, and a control element accommodation chamber that accommodates at least one of the first inverter and the second inverter is formed along an outer peripheral wall of the first case portion.

15 . The vehicle drive device according to claim 4 , further comprising:
a smoothing capacitor connected between the DC power source and the first inverter and the second inverter to smooth DC power to be supplied to both the first inverter and the second inverter, wherein the smoothing capacitor and the first inverter are disposed side by side, and the first inverter and the second inverter are disposed side by side.

16 . The vehicle drive device according to claim 4 , wherein:
the case includes a first case portion that accommodates the speed change mechanism and a second case portion that accommodates the rotary electric machine; and the electric pump and the pump motor are disposed in the first case portion, and a control element accommodation chamber that accommodates at least one of the first inverter and the second inverter is formed along an outer peripheral wall of the first case portion.

17 . The vehicle drive device according to claim 5 , wherein:
the case includes a first case portion that accommodates the speed change mechanism and a second case portion that accommodates the rotary electric machine; and the electric pump and the pump motor are disposed in the first case portion, and a control element accommodation chamber that accommodates at least one of the first inverter and the second inverter is formed along an outer peripheral wall of the first case portion.

1

Assignees

• Aisin Aw Co

Inventors

• Suzuki Tomoyuki
• Uechi Tatsuyuki
• Kondo Tatsuya
• Ito Yoshinobu

Classifications

• H05K7/14327

  having supplementary functional units, e.g. data transfer modules or displays or user interfaces · CPC title

• F16H57/02

  Gearboxes; Mounting gearing therein · CPC title

• B60K6/26 Primary

  characterised by the motors or the generators · CPC title

• H02K11/0094

  Structural association with other electrical or electronic devices · CPC title

• H02P27/06

  using DC to AC converters or inverters (H02P27/05 takes precedence) · CPC title