Electric vehicle

Patent metadata

Field	Value
Publication number	US-10744862-B2
Application number	US-201816132747-A
Country	US
Kind code	B2
Filing date	Sep 17, 2018
Priority date	Sep 27, 2017
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

An electric vehicle is provided with an electric motor serving as a driving source and is not provided with an internal combustion engine from which power is transmitted to drive wheels driven by power from the electric motor. The electric vehicle includes: a torque converter that is disposed coaxially with an output shaft of the electric motor, and to which the power is transmitted from the electric motor; an automatic transmission disposed on a power transmission path between the electric motor and the drive wheels, and configured to achieve a shift stage at which the power is interrupted; and a mechanical oil pump driven by the power from the electric motor, and disposed on the power transmission path, at a position upstream of the automatic transmission in a direction of power transmission from the electric motor to the drive wheels. The mechanical oil pump is disposed in the electric motor.

First claim

What is claimed is:

1. An electric vehicle provided with an electric motor serving as a driving source, the electric vehicle not being provided with an internal combustion engine from which power is transmitted to drive wheels driven by power from the electric motor, the electric vehicle comprising:
a torque converter that is disposed coaxially with an output shaft of the electric motor, and to which the power is transmitted from the electric motor;
an automatic transmission disposed on a power transmission path between the electric motor and the drive wheels, the automatic transmission being configured to achieve a shift stage at which the power is interrupted; and
a mechanical oil pump driven by the power from the electric motor, the mechanical oil pump being disposed on the power transmission path, at a position upstream of the automatic transmission in a direction of power transmission from the electric motor to the drive wheels,
wherein the mechanical oil pump is disposed in the electric motor.

2. The electric vehicle according to claim 1 , wherein an output shaft of the torque converter is provided with a bevel gear meshing with a final driven gear.

3. The electric vehicle according to claim 1 , wherein the automatic transmission is disposed in the electric motor.

4. The electric vehicle according to claim 1 , wherein
the automatic transmission includes:
a transmission input shaft and a transmission output shaft that are disposed in parallel to each other;
a low-speed shifting mechanism that achieves a low-speed shift stage, the low-speed shifting mechanism being disposed on a power transmission path between the transmission input shaft and the transmission output shaft, and the low-speed shifting mechanism being disposed coaxially with the transmission output shaft;
a high-speed shifting mechanism that achieves a high-speed shift stage, the high-speed shifting mechanism being disposed on the power transmission path between the transmission input shaft and the transmission output shaft, and the high-speed shifting mechanism being disposed coaxially with the transmission input shaft;
a synchromesh dog clutch that permits and interrupts power transmission between the transmission output shaft and the low-speed shifting mechanism; and
a friction clutch that permits and interrupts power transmission between the transmission input shaft and the high-speed shifting mechanism.

Assignees

• Toyota Motor Co Ltd

Inventors

• Sekiguchi Tadashi
• Seki Yushi

Classifications

• B60K1/00 Primary

  Arrangement or mounting of electrical propulsion units (B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00) · CPC title

• F16H47/06

  the fluid gearing being of the hydrokinetic type · CPC title

• F16H2200/0021

  specially adapted for electric vehicles · CPC title

• B60K2025/005

  driven by electric motors forming part of the propulsion unit · CPC title

• B60K2001/001

  one motor mounted on a propulsion axle for rotating right and left wheels of this axle · CPC title