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Screw-nut gear-shifting mechanism for automatic two-gear transmission of electric car

A technology for automatic transmissions and lead screw nuts, which is applied to mechanical equipment, transmission devices, components with teeth, etc., can solve the problems of complex structure and large volume of the shift mechanism, and achieve enhanced shift reliability, small size, good reliability effect

Inactive Publication Date: 2014-02-05
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of complex structure and large volume of the shifting mechanism, the present invention provides a screw nut shifting mechanism for a two-speed automatic transmission of an electric vehicle

Method used

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  • Screw-nut gear-shifting mechanism for automatic two-gear transmission of electric car
  • Screw-nut gear-shifting mechanism for automatic two-gear transmission of electric car
  • Screw-nut gear-shifting mechanism for automatic two-gear transmission of electric car

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Embodiment Construction

[0018] The present invention will be further described through the embodiments below in conjunction with the accompanying drawings.

[0019] see figure 1 and figure 2 , the screw nut shifting mechanism used for the two-speed automatic transmission of electric vehicles includes two input shafts 20 and an intermediate shaft 21 parallel to each other. The first gear driving gear 1 and the second gear driving gear 2 are respectively fixedly installed on the input shaft 20 to form a gear shaft. see image 3 , the second-speed driven gear 3 and the first-speed driven gear 4 are installed on the intermediate shaft 21 respectively, wherein the second-speed driven gear 3 is idly sleeved on the intermediate shaft 21 through the first sleeve 22 and the first needle bearing 23 Above, the first gear driven gear 4 is idly sleeved on the intermediate shaft 21 through the second sleeve 24 and the second needle bearing 25 . The intermediate shaft 21 on the outside of the first gear driven...

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Abstract

The invention relates to a screw-nut gear-shifting mechanism for an automatic two-gear transmission of an electric car. The mechanism comprises an input shaft, an intermediate shaft and a fork gear-shifting mechanism, wherein the input shaft and the intermediate shaft are parallel to each other; a first-gear driving gear and a second-gear driving gear are fixedly arranged on the input shaft respectively; a second-gear driven gear, a first-gear driven gear, a main reduction driving gear and a synchronizer are sequentially arranged on the intermediate shaft respectively; the first-gear driving gear and the first-gear driven gear are normally engaged, and the second-gear driving gear and the second-gear driven gear are normally engaged; a main reduction driven gear is arranged to be matched with the main reduction driving gear, and during installation for usage, the main reduction driven gear is fixed on a differential mechanism flange plate through bolts; and a fork of the fork gear-shifting mechanism is sleeved with a joint sleeve of the synchronizer. According to the mechanism, a screw and screw-nut mechanism is adopted, so that the accuracy and the reliability of gear shifting are improved; and the mechanism is simple in structure, convenient to install and small in size, has a self-locking function and can prevent gears from loosening.

Description

technical field [0001] The invention belongs to a shifting mechanism of a two-speed automatic transmission of an electric vehicle, in particular to a screw nut shifting mechanism of a two-speed automatic transmission of an electric vehicle. Background technique [0002] As the transmission system of pure electric vehicles, the two-speed transmission of electric vehicles not only improves the working efficiency of the motor, but also improves the power performance of the transmission. The shifting actuators mostly adopt structures such as multi-stage reduction gears, rack-and-pinion mechanisms, or worm gears. The adoption of these structures makes full use of the characteristics of high gear transmission efficiency, easy processing and low cost to ensure good driving quality. , and its response speed is efficient and fast, and its structure is compact. However, the above-mentioned multi-stage reduction gear, rack and pinion mechanism or worm gear and other transmission struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H59/02
CPCF16H59/08F16H25/20F16H61/04F16H63/32F16H63/34F16H2025/2075F16H2025/2087F16H2059/082
Inventor 赵韩何李婷黄康陈奇赵玉才冯关华刘拂晓冯永恺
Owner HEFEI UNIV OF TECH
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