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Two-stage gearbox of electric vehicle

A technology for electric vehicles and gearboxes, applied in the field of gearboxes, can solve problems such as not being a problem, and achieve the effect of improving efficiency, improving work efficiency, and taking up less space

Inactive Publication Date: 2016-07-06
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for a car with an electric motor as the engine, achieving controllable speed over a wide range is not a problem

Method used

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  • Two-stage gearbox of electric vehicle
  • Two-stage gearbox of electric vehicle
  • Two-stage gearbox of electric vehicle

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] see Figure 1~3 , inventing a two-stage gearbox for an electric vehicle, including a sun gear 6, the sun gear 6 is connected by two front and rear first sun gears and second sun gears of different sizes through pivot pins 11; it also includes an internal gear The ring 3 is provided with a pulley groove 12 for connecting a pulley brake on its outside; it also includes a first planetary wheel set 4, a second planetary wheel set 5, a first planetary carrier 10, a second planetary carrier 9, a belt type Brake 13 , disc brake 14 , input shaft 2 and output shaft 7 .

[0026] The left end of the input shaft 2 is connected with the motor 1 of the automobile, and the right end is connected with the first planet carrier 10 ; the left end of the output shaft is connected with the second planet carrier 9 , and the right end is connected with the wheel 8 .

[002...

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Abstract

The invention discloses a two-stage gearbox of an electric vehicle. The two-stage gearbox comprises a first planet gear group, a second planet gear group, an inner gear ring, a first planet carrier, a second planet carrier, a first sun gear and a second sun gear, wherein the first planet gear group is mounted on the first planet carrier; the second planet gear group is mounted on the second planet carrier; the first planet gear group, the first sun gear and the inner gear ring are matched to form a first planet gear system structure; the first sun gear is positioned on the inner side of the first planet gear group; the inner gear ring is positioned on the outer side of the first planet gear group; the second planet gear group, the second sun gear and the inner gear ring are marched to form a second planet gear system structure; the second sun gear wheel is positioned on the inner side of the second planet gear group; the inner gear ring is positioned on the outer side of the second planet gear group; an outer gear ring is connected with a belt brake; and the center shafts of the sun gears are connected with a disc brake. The two-stage gearbox has the advantages that the transmission ratio can be changed by controlling the brakes which are positioned on both the sun gears and the outer gear ring, so as to achieve two-stage speed change.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and in particular relates to a gearbox. Background technique [0002] Pure electric vehicles on the market are generally equipped with a single-stage transmission to trade off efficiency and dynamic performance, such as maximum speed, acceleration and scalability. However, this makes the motor run at a critical point for a long time. Studies have shown that the use of multi-speed transmissions for pure electric vehicles can reduce the size of the electric motor and provide an optimal balance between efficiency and dynamic characteristics, making the motor work better work under conditions and improve economy. [0003] Currently used multi-speed transmissions, such as mechanized manual transmissions, automatic transmissions, dual-clutch transmissions and continuously variable transmissions, were originally aimed at gasoline-powered cars. The characteristic curve of the internal combust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/70
CPCF16H3/70F16H2200/0034F16H2200/0021F16H2200/2007F16H2200/2035
Inventor 党磊磊郑泽亚党盼盼曾红党莉莉
Owner CHANGAN UNIV
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