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Gearwheel arrangement for electric vehicle transmissions

A technology of gear device and electric vehicle, applied in the direction of transmission device, electric power device, gear transmission device, etc., can solve the problems of interfering meshing, increasing transmission mechanism loss, transmission mechanism efficiency loss, etc.

Pending Publication Date: 2021-08-06
ZF FIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In most cases, weight reduction comes with a loss in transmission efficiency
Especially in highly loaded lightweight transmissions it is known that all parts involved in the force transmission are elastically deformed, which can interfere with the meshing of the teeth and increase the wear of the transmission

Method used

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  • Gearwheel arrangement for electric vehicle transmissions
  • Gearwheel arrangement for electric vehicle transmissions
  • Gearwheel arrangement for electric vehicle transmissions

Examples

Experimental program
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Embodiment Construction

[0031] exist figure 1 An electric vehicle 10 is schematically shown in FIG. 2 , having drive wheels 12 , a transaxle 14 operatively connected to the drive wheels 12 , and a powertrain 15 . Here, the drawing is a bird's-eye sectional view. Important components are shown enlarged.

[0032] The drive train 15 has an electric vehicle transmission 17 with a gear arrangement 16 according to the application, an electric machine 18 and a differential 20 . The electric machine 18 is in operative connection with a pinion 22 , which meshes with a driven gear 23 , wherein the driven gear 23 is non-rotatably connected at a gear root 24 with the differential 20 . The drive force can be transmitted to the drive wheels 12 via the differential 20 . In this case, the pinion 22 , the output gear 23 and the differential 20 can be accommodated in a transmission housing 26 .

[0033] During the acceleration process of the drive operation, drive power is provided in the drive train 15 by the ele...

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PUM

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Abstract

The invention relates to a gearwheel arrangement (16) for establishing a gear stage in a transmission (17) in an electric vehicle, comprising a pinion (22) and an output gearwheel (23). The pinion (22) and the output gearwheel (23) are designed as spur gears, which are in engagement with one another in order to bring about a transmission of a drive power of an electric machine (18). A ratio of a gearwheel diameter to a module of the output gearwheel (23) is in the range of 140 to 350, preferably in the range of 205 to 315, and particularly preferable in the range of 205 to 230. The invention further relates to an electric vehicle transmission (17) having such a gearwheel arrangement (16), and to a drive train (15) for an electric vehicle (10) having an electric machine (18), a differential (20), and an electric vehicle transmission (17) such as described.

Description

technical field [0001] The invention relates to a gear arrangement for an electric vehicle transmission, as well as an electric vehicle transmission having such a gear arrangement and a drive train having such an electric vehicle transmission. Background technique [0002] Spur gears have the advantage of a relatively simple construction, since fewer moving parts are used and it is relatively simple to produce a spur gear with external teeth. The disadvantage is that the achievable transmission ratio within one stage is relatively small. Furthermore, for the same transmitted power, a spur gear is larger and therefore also heavier than a planetary gear, for example. In order to create a larger transmission ratio with a spur gear pair, the circumference of at least one gear is kept small, while the circumference of the second gear is kept larger. The smaller the at least one of the gears in mesh, the smaller the degree of engagement (ie the number of teeth in mesh). It must...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H55/17F16H1/06B60K1/00
CPCF16H55/17F16H1/06B60K1/00F16H2200/0021B60K2001/001F16H55/08
Inventor A·萨博M·维萨
Owner ZF FIEDRICHSHAFEN AG