Two-speed transmission for an electrically driven motor vehicle

A technology for motor vehicles and transmissions, applied in vehicle gearboxes, mechanical drive clutches, vehicle components, etc., can solve the problems of loud transmission, jumping out, etc., and achieve the effect of large rotation speed range, large torque range, and comfortable power transmission.

Pending Publication Date: 2020-12-22
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The actuator finger may then jump out of the shift gate or bend
In addition to this damage, the transmission is also very loud

Method used

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  • Two-speed transmission for an electrically driven motor vehicle
  • Two-speed transmission for an electrically driven motor vehicle
  • Two-speed transmission for an electrically driven motor vehicle

Examples

Experimental program
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Embodiment Construction

[0033] figure 1 The illustrated two-speed transmission 10 has an input shaft 12 connectable for common rotation to a motor shaft of an electric motor of a motor vehicle, in particular an electric scooter. The input shaft 12 may be coupled to the output shaft 18 via a first gear stage 14 and a second gear stage 16 having different gear ratios to drive drive wheels of a motor vehicle coupled to the output shaft 18 . The first gear stage 14 has a first gear 20 axially attached as an idler gear to the input shaft 12 in a substantially immovable manner and meshes with a first fixed gear 22 fixedly connected to the output shaft 18 . The second gear stage 16 has a second gear 24 axially attached as an idler gear to the input shaft 12 in a substantially immovable manner and meshing with a second fixed gear 26 fixedly connected to the output shaft 18 . Between the first gear 20 and the second gear 24 , a sliding sleeve 28 is connected to the input shaft 12 in a non-rotatable but axi...

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PUM

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Abstract

Provided is a two-speed transmission (10) for an electrically driven motor vehicle, in particular an electric motor scooter. The transmission is provided with an input shaft (12) for introducing torque, an output shaft (18) for outputting torque, a first gear (14), a second gear (16), a slider sleeve (28) which is guided on the input shaft (12) or on the output shaft (18) in an non-rotatable but axially displaceable manner, for establishing a positively locking connection with a first gearwheel (20) of the first gear (14) and/or with a second gearwheel (24) of the second gear (16), and an actuating actuator (40) which has an extendable actuating finger (38) for axially moving the slider sleeve (28), wherein the slider sleeve (28) has a sliding ramp (42, 44) which runs in the circumferential direction and is bevelled with respect to a radial plane for the output at the extended actuating finger (38) of the actuating actuator (40). In order to prevent damage or noises occurring during switching, the sliding ramp (42, 44) is designed to be axially resilient, so that a comfortable power transmission is made possible in the case of an electrically driven motor vehicle.

Description

technical field [0001] The invention relates to a two-speed transmission for an electrically driven motor vehicle, by means of which the power of an electric machine can be converted. Background technique [0002] Electric vehicles will become increasingly important in the future. A two-speed transmission helps to achieve acceleration and gradeability on the one hand, and top speed on the other hand, especially for two-wheeled vehicles such as electric bicycles, pedelecs, scooters, small scooters, electric A bicycle, moped, motorcycle or tricycle (such as a rickshaw). For example, to take advantage of the characteristic starting capabilities of brushless DC motors, a clutchless two-speed transmission is recommended. [0003] When accelerating an electrically driven motor vehicle from a standstill, the electric machine may initially accelerate from standstill to a base speed with a substantially constant torque. When base speed is reached, the motor's drive power remains e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/089
CPCF16H2200/0034F16H2200/2064F16H2200/2094F16D2023/0631F16H3/089F16H2007/0802
Inventor 普斯·萨蒂亚纳拉亚纳普拉若·艾亚帕特
Owner SCHAEFFLER TECH AG & CO KG
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