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A two-speed mechanical automatic transmission for electric vehicles

A technology for automatic transmissions and electric vehicles, applied in automatic clutches, mechanical equipment, clutches, etc., can solve the problems of complex automatic transmission structures, high dependence on electronic devices, and reduced system stability, so as to improve system stability and reduce production cost, the effect of reducing performance requirements

Active Publication Date: 2015-11-25
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage is that the shift strategy can be controlled by a computer, and the shift is precise and controllable; however, the structure of this automatic transmission is relatively complicated, and it is highly dependent on electronic devices, which will lead to an increase in manufacturing costs and a decrease in system stability.

Method used

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  • A two-speed mechanical automatic transmission for electric vehicles
  • A two-speed mechanical automatic transmission for electric vehicles
  • A two-speed mechanical automatic transmission for electric vehicles

Examples

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0027] In order to reduce the requirements on the driving motor, and at the same time make it possible to directly adopt a mechanical structure to control gear shifting on the basis of no additional configuration of an electric gear shifting mechanism, and reduce the dependence on electronic devices, the two-speed mechanical automatic transmission for electric vehicles in this embodiment The schematic diagram of the structure is as figure 1 shown.

[0028] The automatic transmission includes a transmission control system, and a speed change transmission mechanism and a shift manipulation mechanism both connected with the transmission control system. The shifting mechanism includes a synchronizer shifting mechanism and a centrifugal shifting mechanism, the centrifugal shifting mechanism is connected with the transmission control system and the ...

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Abstract

The invention provides a two-gear mechanical automatic gearbox for an electric vehicle, and belongs to the technical field of electric vehicle transmission. The transmission comprises a transmission control system, a double-stage driving variable transmission mechanism and a gear shift control mechanism, wherein the gear shift control mechanism comprises a centrifugation gear shift control mechanism and a synchronizer gear shift mechanism; and the centrifugation gear shift control mechanism adopts a mechanical structure, detects vehicle speed through gear drive, and generates centrifugal force to be combined with returning force of a spring to realize the mechanical automatic speed change. The automatic gearbox adopts two gears to realize automatic speed change, combines with a driving motor with an excellent speed regulation property, reduces performance requirements of the driving system on the driving motor, and improves the efficiency of the driving motor as well as dynamic property and economy of a whole vehicle; and compared with a conventional electronic-controlled automatic transmission, the manufacturing inheritance is good, and an electrical control operation gear shift mechanism is omitted and replaced with the mechanical gear shift mechanism, so that the manufacturing cost is lowered, and the system stability is improved.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle transmission, and relates to an electric vehicle automatic transmission, in particular to an electric vehicle transmission which realizes automatic shifting through a mechanical structure. Background technique [0002] In order to solve the two world-wide problems of energy crisis and environmental pollution, electric vehicle technology has become the main direction of future automobile development. In the power transmission system of a general internal combustion engine vehicle, a multi-speed transmission mode is often used to enable the vehicle to obtain good power and fuel economy, and effectively reduce engine emission pollution. Compared with the internal combustion engine, the motor drive has the mechanical characteristics of constant torque at low speed and constant power at high speed, and has a wide range of speed regulation. It has great advantages as a power source for automobi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H3/02F16H59/38F16H61/26F16D43/04B60W10/08B60W10/11
Inventor 熊璐卢泳陵余卓平袁兵
Owner TONGJI UNIV
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