Speed-transformation device for electric automobile

A technology of electric vehicles and speed change devices, which is applied in transmission devices, gear transmission devices, belts/chains/gears, etc., can solve the problems of electric vehicles out of control and motor energy cannot be regenerated, and achieve energy regeneration and avoid power loss.

Active Publication Date: 2012-07-11
爱思帝达耐时(上海)驱动系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, when driving downhill at the first speed, because the two-way clutch is released and is in a neutral state, the electric vehicle is in danger of losing control.
Similarly, when braking at the first speed, if the shift to the second speed is not forced, there is a problem that the energy of the electric motor cannot be regenerated

Method used

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  • Speed-transformation device for electric automobile
  • Speed-transformation device for electric automobile
  • Speed-transformation device for electric automobile

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Effect test

Embodiment Construction

[0074] refer to Figure 1-9 Embodiments of the present invention will be described. However, the present invention is not limited to this embodiment. In addition, below, the transmission device for an electric vehicle may be simply referred to as a "transmission device".

[0075] figure 1 It is a schematic diagram of the driving system according to the first embodiment of the present invention. like figure 1 As shown, the speed change device 10 has an electric motor 12, an input shaft 14 connected to the electric motor 12, and an output shaft 16 connected to a wheel not shown, and a synchronous mechanism 20, a clutch, and a clutch are sequentially arranged from the input shaft 14 to the output shaft 16. mechanism 30 and planetary gear mechanism 40. In addition, the planetary gear mechanism 40 of the transmission 10 is a single-pinion planetary gear mechanism. In addition, the clutch mechanism 30 is a wet multi-plate clutch, but it is not limited to this as long as it i...

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Abstract

The invention provides a speed-transformation device used for an electric automobile. The speed-transformation device is provided with a fork-shaped rod, a synchronous mechanism, a clutch mechanism and a planet gear mechanism arranged on the same line with an input shaft connecting with an electric motor and an output shaft connecting with the wheel. The synchronous mechanism, the clutch mechanism and the planet gear mechanism are arranged in the shell successively. A sleeve of the synchronous mechanism connects with the forked shaped rod. A hub in a spline fit with the sleeve can not be fixed on the shell in the periphery of the output shaft in a rotary manner. A conical part connects with a clutch drum of the clutch mechanism. The clutch mechanism can switch to a connection state and a releasing state of the input shaft and the clutch drum. The output shaft connects with a sun gear. An inner gear connects with a clutch drum. A planet support connects with the output shaft. When the synchronous mechanism is in connection, the clutch mechanism is released. When the synchronous mechanism is released, the clutch mechanism is connected. The speed-transformation device used for the electric automobile in the invention is small in size and has low power loss. Even when mandatory speed transmission to a second speed is realized in braking, the speed transformation can also be realized.

Description

technical field [0001] The invention relates to a speed change device of an electric vehicle driven by an electric motor. Background technique [0002] An electric vehicle runs by driving an electric motor using electric power stored in a battery. The electric motor can generate a large torque at zero speed, and electric vehicles do not necessarily need a transmission because of the wide speed range. The output characteristics of the motor are as Figure 12 As shown, it has a constant output torque until it reaches about 1 / 2 of the maximum rotational speed of the motor. In order to increase this constant output torque, it is necessary to increase the size of the electric motor. However, by providing a speed change device such as a two-stage speed change, it is possible to increase the output torque without increasing the size of the electric motor. Here, as an example of a transmission for an electric vehicle, there are transmissions disclosed in Patent Documents 1 and 2. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/70F16H3/78F16H57/04
Inventor 北林永有
Owner 爱思帝达耐时(上海)驱动系统有限公司
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