Electric vehicle driving device

A driving device and electric vehicle technology, applied in the direction of electric vehicles, electric power devices, multi-ratio transmissions, etc.

Inactive Publication Date: 2014-07-09
NSK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the clutch needs to be an actuator for switching between the state of synchronous rotation and the state of idling relative to the rotation shaft of the gear provided at the middle part of the shaft direction of the rotation shaft while maintaining the rotation state of the rotation shaft. From the viewpoint of simplification of the structure of the driving device, it can be said that there is still room for further improvement.

Method used

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  • Electric vehicle driving device
  • Electric vehicle driving device
  • Electric vehicle driving device

Examples

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Embodiment Construction

[0053] [First example of embodiment]

[0054] Figure 1 ~ Figure 2 It shows the first example of the embodiment of the present invention. The drive device for an electric vehicle of this example includes an electric motor 1a, a planetary gear transmission 11, and a rotation transmission device 3a. Among them, the electric motor 1a rotatably drives the driving side rotating shaft 4a of the planetary gear type transmission 11 provided concentrically with the output shaft through its output shaft.

[0055] The planetary gear type transmission 11 is installed between the electric motor 1a and the rotation transmission device 3a. After the power of the electric motor 1a is decelerated at a predetermined speed ratio, it is transmitted to the rotation transmission device 3a via the hollow cylindrical passive side rotating shaft 5a. transfer. The planetary gear transmission 11 is composed of a drive side rotating shaft 4a and a driven side rotating shaft 5a arranged concentrically with t...

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PUM

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Abstract

The purpose of the invention is to reduce in size and simplify an electric vehicle driving device embedding a planetary gear type transmission (11) to increase a running distance per charge and obtain the structure thereof capable of improving the convenience of an electric vehicle. The planetary gear type transmission (11) is constituted by a first planetary gear mechanism (12) of a single pinion type and a second planetary gear mechanism (13) of a double pinion type and transmits the power of an electric motor (1a) to a driven-side rotating shaft (5a) after reducing the speed according to a desired transmission gear ratio. A first braking device (14) and a second braking device (15) switch a ring gear (22) and a second sun gear (19) to the states of allowing and preventing rotation with respect to a fixed portion, respectively.

Description

Technical field [0001] The present invention relates to a drive device for an electric vehicle that decelerates the output of an electric motor and transmits it to drive wheels. Background technique [0002] In response to the recent trend of reducing dependence on fossil fuels, the research and development of electric vehicles, electric vehicles have been partially put into practical use. The electric motor, which is the power source of electric vehicles, is different from an internal combustion engine (engine) that is activated by direct burning of fossil fuels. Generally, the characteristics of torque and rotation speed of the output shaft, such as the maximum torque generated at the start, are preferred for use in automobiles. Therefore, it is not necessary to install a transmission that is necessary in a general automobile that uses an internal combustion engine as a driving source. However, even in the case of an electric vehicle, by installing a transmission, acceleration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/66B60K1/00H02K7/116
CPCB60K1/00F16H61/32F16H3/663H02K7/116F16H2200/0021F16H2200/0034F16H2200/2005F16H2200/2023B60K2001/001F16H2200/2035B60L15/2054B60L2240/12B60L2240/421B60L2240/423B60L2240/486Y02T10/72F16H2061/2884F16H2061/2892Y02T10/64B60K17/12F16H3/46F16H2003/442
Inventor 田中一宇井上英司今西尚松田靖之郡司大辅
Owner NSK LTD
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