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Two-speed automatic transmission for pure electric vehicles

A technology for automatic transmissions and pure electric vehicles, which is applied in the direction of vehicle gearboxes, electric power units, multi-ratio transmissions, etc. It can solve the problems of high requirements for drive motors and batteries, low operating efficiency of drive motors, etc., and reduce the total volume , the effect of expanding the transmission ratio range and reducing the size

Active Publication Date: 2017-01-11
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a two-speed automatic transmission for pure electric vehicles, so as to solve the problems of the existing single-speed reducer for pure electric vehicles, which have high requirements on the driving motor and battery, and the operating efficiency of the driving motor is low, and improve the efficiency of the pure electric vehicle. Power and economy of electric vehicles

Method used

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  • Two-speed automatic transmission for pure electric vehicles
  • Two-speed automatic transmission for pure electric vehicles
  • Two-speed automatic transmission for pure electric vehicles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Example 1 as figure 1 As shown, a two-speed automatic transmission for a pure electric vehicle of the present invention includes an input shaft 1, a first intermediate shaft 2, a second intermediate shaft 3, a first cylindrical gear pair G1, a second cylindrical gear pair G2, a third cylindrical gear pair gear pair G3 , first torque transmitting device C1 , second torque transmitting device C2 , and differential assembly 14 . in:

[0065] 1) The cross section of the input shaft 1 is circular;

[0066] 2) The cross section of the first intermediate shaft 2 is circular;

[0067] 3) The cross section of the second intermediate shaft 3 is circular;

[0068] 4) The first cylindrical gear pair G1 is a helical cylindrical gear pair, including the first cylindrical gear pair driving gear 4 and the first cylindrical gear pair driven gear 5;

[0069] 5) The second cylindrical gear pair G2 is a helical cylindrical gear pair, including the second cylindrical gear pair driving g...

Embodiment 2

[0103] Example 2 as figure 2 As shown, a two-speed automatic transmission for pure electric vehicles in the present invention includes an input shaft 1, a first intermediate shaft 2, a second intermediate shaft 3, a first cylindrical gear pair G1, a second cylindrical gear pair G2, a third cylindrical gear pair gear pair G3 , first torque transmitting device C1 , second torque transmitting device C2 , and differential assembly 14 . in:

[0104] 1) The cross section of the input shaft 1 is circular;

[0105] 2) The cross section of the first intermediate shaft 2 is circular;

[0106] 3) The cross section of the second intermediate shaft 3 is circular;

[0107] 4) The first cylindrical gear pair G1 is a helical cylindrical gear pair, including the first cylindrical gear pair driving gear 4 and the first cylindrical gear pair driven gear 5;

[0108] 5) The second cylindrical gear pair G2 is a helical cylindrical gear pair, including the second cylindrical gear pair driving gea...

Embodiment 3

[0142] Example 3 as image 3 As shown, a two-speed automatic transmission for a pure electric vehicle of the present invention includes an input shaft 1, a first intermediate shaft 2, a second intermediate shaft 3, a first cylindrical gear pair G1, a second cylindrical gear pair G2, a third cylindrical gear pair gear pair G3 , first torque transmitting device C1 , second torque transmitting device C2 , and differential assembly 14 . in:

[0143] 1) The cross section of the input shaft 1 is circular;

[0144] 2) The cross section of the first intermediate shaft 2 is circular;

[0145] 3) The cross section of the second intermediate shaft 3 is circular;

[0146] 4) The first cylindrical gear pair G1 is a helical cylindrical gear pair, including the first cylindrical gear pair driving gear 4 and the first cylindrical gear pair driven gear 5;

[0147] 5) The second cylindrical gear pair G2 is a helical cylindrical gear pair, including the second cylindrical gear pair driving g...

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Abstract

A two-speed automatic transmission for pure electric vehicles is characterized in that it includes an input shaft, a first intermediate shaft, a second intermediate shaft, a first cylindrical gear pair, a second cylindrical gear pair, a third cylindrical gear pair, a first The torque transmission device, the second torque transmission device, and the differential assembly; the rotational centerlines of the input shaft, the second intermediate shaft, and the differential assembly are parallel to each other. The invention provides a two-speed automatic transmission for a pure electric vehicle, which solves the problems of the existing single-speed reducer for a pure electric vehicle, such as high requirements on the drive motor and battery, and low operating efficiency of the drive motor, and improves the efficiency of the pure electric vehicle. The power and economy of the car.

Description

technical field [0001] The invention relates to a two-speed transmission, in particular to a two-speed automatic transmission applied to pure electric vehicles, belonging to the technical field of automobiles. Background technique [0002] Power transmission technology is the core technology of pure electric vehicles, and its type and performance directly determine the power performance and energy consumption level of pure electric vehicles. In the case of a certain drive motor performance, in order to further increase the torque of the drive wheel, meet the power requirements of pure electric vehicles, and be able to adjust the relationship between the motor speed and vehicle speed, a variable speed transmission is often used. At present, pure electric vehicles mostly use single-speed reducers, which are simple in structure, small in size, light in weight, and low in cost. There is no need to change gears during operation, and there is no power interruption. [0003] Howev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H37/08
CPCF16H37/0813B60K1/00B60K2001/001F16H2200/0034F16H2200/0021F16H3/089F16H2003/0818
Inventor 程云江徐向阳刘艳芳崔靓伊
Owner BEIHANG UNIV
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