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Reducer

A technology of reducer and speed, applied in the direction of vehicle gearbox, gear transmission, transmission element, etc., can solve the problem of unable to balance the power performance and economy of pure electric vehicle, and achieve the effect of improving the power performance and motor economy of the vehicle

Inactive Publication Date: 2020-09-11
摩登汽车有限公司
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the fixed speed ratio reducer in the prior art cannot balance the power and economy of pure electric vehicles

Method used

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Embodiment 1

[0047] In order to solve the problem that the fixed speed ratio reducer in the prior art cannot balance the power and economy of pure electric vehicles, such as Figure 1-Figure 3 As shown, the implementation of this embodiment discloses a speed reducer, the speed reducer can automatically realize gear shifting according to the output speed of the motor, wherein the gear positions include at least one high speed gear and one low speed gear: when the output speed is greater than the target speed , the reducer is in the high-speed gear; when the output speed is lower than the target speed, the reducer is in the low-speed gear, so that according to various working conditions, such as climbing and flat roads, the power output needs to be different. Different torques are provided to balance the power and economy of pure electric vehicles. In addition, the reducer in this embodiment has no electronic components, so it has no electromagnetic interference, and its reliability is relat...

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Abstract

The invention discloses a reducer. The reducer can shift gears automatically according to an output rotating speed of a motor, wherein gears at least comprise one high speed gear and one low speed gear. When the output rotating speed is higher than a target rotating speed, the reducer is in the high speed gear and when the output rotating speed is smaller than the target rotating speed, the reducer is in the low speed gear, so that the reducer can shift gears automatically according to the output rotating speed of the motor and different torques can be provided when power is output according to different demands on power output in various different working conditions such as climbing and level rod driving, and therefore, the dynamic property and the economical benefit of a pure electric vehicle are balanced.

Description

technical field [0001] The invention relates to the technical field of automobile manufacturing, in particular to a speed reducer. Background technique [0002] Electric vehicles, like traditional vehicles, need a reducer to transmit the power generated by the electric motor to the drive wheels. Moreover, according to various working conditions, such as different demands on power output for climbing and flat road driving, it is necessary to provide different torques during power output. Therefore, the reducer of an electric vehicle generally also needs to provide multiple gears for switching. [0003] However, the speed ratio of the reducer of the current pure electric vehicle is mostly a fixed speed ratio, which cannot fully take into account the dynamic performance of the motor in the constant torque stage and the efficiency of the constant power stage. Specifically: the speed ratio of the reducer is too large, and the motor efficiency is low in the high-speed stage ; Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H37/08F16H3/093
CPCF16H3/093F16H37/0813F16H2200/0039
Inventor 熊洪波王晓辉曾超
Owner 摩登汽车有限公司
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