Gear shifting device of automatic transmission of electric vehicle

A technology of automatic transmission and shifting device, which is applied in the direction of transmission control, mechanical control device, instrument, etc., can solve the problems of worm gear and cam mechanism, which are difficult to process, increase the failure rate of shifting device, and complex power transmission. , to achieve the effect of convenient use and implementation, compact structure and broad application prospects

Pending Publication Date: 2019-02-19
江苏易行车业有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing shifting mechanism, due to the large number of original parts involved in the shifting and the complicated power transmission, increases the failure rate of the shifting device, and there are hidden dangers in product quality in the design and manufacture of the worm gear and the cam mechanism, an...

Method used

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  • Gear shifting device of automatic transmission of electric vehicle
  • Gear shifting device of automatic transmission of electric vehicle

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Embodiment Construction

[0018] In order to deepen the understanding of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, which are only used to explain the present invention and do not limit the protection scope of the present invention.

[0019] As shown in the figure, this embodiment provides a shifting device for an automatic transmission of an electric vehicle. The shifting device is arranged inside the gearbox. A shift assembly and a shift drive system, the shift assembly includes a guide shaft 1, a shift fork shaft 2, a shift fork 3, a limit device, a low-speed gear contact sensor 4 and a high-speed gear contact sensor 5, the shift fork 3 is sleeved on the shift fork shaft 2, the shift drive system includes a shift motor 6, a ball screw 7 and a guide block 9 sleeved on the ball screw 7 through a screw 8, the shift The gear motor 6 is arranged above the ball screw 7 , and the guide block 9 is conn...

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PUM

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Abstract

The invention provides a gear shifting device of an automatic transmission of an electric vehicle. The gear shifting device comprises a gear shifting assembly and a gear shifting driving system. The gear shifting assembly comprises a guide shaft, a shifting fork shaft, a shifting fork, a limiting device, a low-gear contact sensor and a high-gear contact sensor. The shifting fork shaft is sleeved with the shifting fork. The gear shifting driving system comprises a gear shifting motor, a ball screw and a guide block spirally arranged on the ball screw in a sleeving mode. The guide block is movably arranged between the guide shaft and the shifting fork shaft. The gear shifting device is simple in structure, the whole working process is completely electrically controlled, and human control isnot needed; and gear dropping is effectively prevented through the limiting device, so that a stable working condition of the transmission is ensured.

Description

technical field [0001] The invention relates to the field of vehicle speed control components, in particular to a shifting device for an automatic transmission of an electric vehicle. Background technique [0002] Existing electric vehicle usually adopts two-speed transmission to shift gears. When this two-speed transmission shifts gears, the source power or speed is provided by the gear shifting motor. After being decelerated by the reduction mechanism, it is converted into the rotational motion of the cam. The rotation of the cam pushes the shift fork sleeved on the shift fork shaft to move linearly, and then Realize gear switching. The existing shifting mechanism, due to the large number of original parts involved in the shifting and the complicated power transmission, increases the failure rate of the shifting device, and there are hidden dangers in product quality in the design and manufacture of the worm gear and the cam mechanism, and the worm gear 1. The processing...

Claims

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Application Information

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IPC IPC(8): F16H61/02F16H63/32
CPCF16H61/0204F16H63/32
Inventor 董学勤许国宏杨阳翟存俊蒋志伟章阳汤卫民
Owner 江苏易行车业有限公司
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