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Pure electric two-speed differential device power assembly

A technology of powertrain and differential, applied in the field of vehicle power system

Inactive Publication Date: 2019-07-02
GUANGZHOU XINYU POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has become a difficult point in the industry to adopt a transmission structure for two-speed and multi-speed electric drive powertrains to obtain the best cost performance for different levels of vehicles

Method used

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  • Pure electric two-speed differential device power assembly
  • Pure electric two-speed differential device power assembly

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Embodiment Construction

[0013] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[0014] Such as figure 1 As shown, the pure electric two-speed differential powertrain is composed of a motor 1 , a first differential 6 , a second differential 13 , a first-stage gear pair, a clutch 9 and a brake 10 . The motor 1 and the first differential 6 are installed coaxially, and the first differential 6 and the second differential 13 are arranged in parallel axes.

[0015] The motor 1 is fixedly connected to the input sun gear 4 through the motor shaft 2, and t...

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Abstract

The invention discloses a pure electric two-speed differential device power assembly for an electric vehicle. A motor drives a first differential device; a first differential device casing is providedwith an input gear; the input gear transmits an output gear in an engaged way; the output gear is arranged in a second differential device casing; the non-gear side of one differential device is coaxially provided with a braking shaft; a clutch is also installed and connected through a self casing; a clutch disc is arranged at the braking shaft in a sheathing way; the clutch disc can generate axial reciprocating motion along the braking shaft; the clutch disc and the clutch are in mutual and clutch transmission. On the basis of the clutch function of the clutch, a brake is matched and selected for closing and / or releasing the differential device; various driving modes such as high-speed gear, low-speed gear, parking or neutral gear are realized; the requirements of precise and compact transmission mechanism, great gear ratio, high efficiency, small vibration noise, no power intermittent gear shifting, small loss, ultralow cost and ultrahigh reliability are realized; the cost performance of a vehicle is shown; the pure electric two-speed differential device power assembly is applicable to various electric vehicles.

Description

technical field [0001] The invention belongs to a vehicle power system, in particular to a power assembly adapted to an electric vehicle. Background technique [0002] With the changes in supporting policies for the electric vehicle industry, battery mileage has increased from 150Km initially to more than 400Km at present, and the price market for electric vehicles has become increasingly fierce. How to obtain a higher mileage and reduce the cost of the electric drive assembly Weight and cost have become one of the research hotspots of major car companies and research institutes in the field of new energy vehicles. Multi-speed electric drive and gear ratio expansion are effective means to improve the efficiency of electric drive and greatly reduce the weight and cost of electric drive. Therefore, two-speed and multi-speed electric drive powertrains and gradually enter experimental demonstration stage. However, it has become a difficult point in the industry to adopt a tran...

Claims

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Application Information

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IPC IPC(8): B60K17/16B60K17/02
CPCB60K17/02B60K17/165
Inventor 段福海王豫陈军
Owner GUANGZHOU XINYU POWER TECH CO LTD
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