Unlock instant, AI-driven research and patent intelligence for your innovation.

Motor driving force transmission device

Inactive Publication Date: 2013-12-12
JTEKT CORP
View PDF9 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention helps prevent the motor from getting too hot during long periods of continuous operation. This allows the device to be used for longer periods of time.

Problems solved by technology

According to the motor driving force transmission device described in Patent Literature 1, however, the electric motor is heated excessively as a result of being operated continuously over a long period of time, resulting in a situation in which the motor driving force transmission device cannot be used continuously.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Motor driving force transmission device
  • Motor driving force transmission device
  • Motor driving force transmission device

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

Advantage of First Embodiment

[0063]According to the first embodiment that has been described heretofore, the following advantages can be obtained.

[0064](1) The first electric motor 3 and the second electric motor 4 can be restrained from being heated excessively as a result of the continuous operation of the motor driving force transmission device 1 over a long period of time, whereby the motor driving force transmission device 1 can be used continuously by using the first electric motor 3 and the second electric motor 4 alternately.

[0065](2) The speed reduction and transmission mechanism 2, the first electric motor 3 and the second electric motor 4 are disposed on the rotational axis O, whereby the radial dimension of the motor driving force transmission device 1 can be reduced, thereby making it possible to realize a reduction in size of the same device as a whole.

second embodiment

[0066]Next, a motor driving force transmission device according to a second embodiment of the invention will be described by using FIGS. 7 and 8. FIGS. 7 and 8 show a speed reduction and transmission mechanism. In FIGS. 7 and 8, like reference numerals will be given to members which have the same or similar functions to those shown in FIGS. 3 and 4, and the detailed description thereof will be omitted here.

[0067]As shown in FIGS. 7 and 8, a speed reduction and transmission mechanism 71 of a motor driving force transmission device according to the second embodiment of the invention is characterized in that a pair of transmission members 72, 73 are formed of internal gears having a cycloid tooth profile.

[0068]Because of this, an external gear 110c of a differential case 110 of a differential 107 is formed of an external gear having a cycloid tooth profile that has a smaller number of teeth than those of the pair of transmission members 72, 73 and which is normally in mesh with the pai...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A motor driving force transmission device including a speed reduction and transmission mechanism which transmits a motor driving force to a rear differential, a first electric motor that is connected to the rear differential via the speed reduction and transmission mechanism and which produces a first motor driving force, a second electric motor that is connected to the first electric motor and the speed reduction and transmission mechanism and which produces a second motor driving force, and an ECU. The ECU outputs a control signal to drive both the first electric motor and the second electric motor when a driving torque required for the rear differential is equal to or larger than a predetermined torque, and outputs a control signal to drive alternately the first electric motor and the second electric motor when the driving torque required for the rear differential is smaller than the predetermined torque.

Description

TECHNICAL FIELD[0001]The present invention relates to a motor driving force transmission device which is preferably used in an electric vehicle having, for example, an electric motor as a drive source.BACKGROUND ART[0002]In conventional motor driving force transmission devices, there are driving force transmission devices that include an electric motor which produces a motor driving force and a speed reduction and transmission mechanism for transmitting the motor driving force of the electric motor to a differential mechanism, which are installed in a motor vehicle (refer to Patent Literature 1, for example).[0003]The electric motor has an output shaft that rotates based on electric power of an onboard battery and which is disposed on one side of the differential mechanism.[0004]The speed reduction and transmission mechanism includes two speed reducing gear sets and is connected to the electric motor and the differential mechanism. The first speed reducing gear set is connected to t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F16H48/20B60L50/15B60L50/16
CPCF16H48/20B60K1/02B60K6/365B60K6/52B60K17/356B60L3/0061B60L15/20B60L2220/44B60L2240/36B60L2240/423B60L2240/425B60L2260/28B60W10/08B60W20/00B60W30/1843B60W2510/087B60W2710/083B60W2720/406B60L50/16B60L50/61F16H48/08F16H2001/325H02K7/116Y02T10/62Y02T10/64Y02T10/70Y02T10/7072Y02T10/72Y10T74/19642B60K7/0007F16H48/34
Inventor KOBAYASHI, TSUNEONOZAKI, TOHRUTAGAMI, MASAHARUYAMAMORI, MOTOYASUTAKUNO, HIROSHISUZUKI, KUNIHIKOTAKAI, TOMOYOSHINOMURA, KEITA
Owner JTEKT CORP