Two-gear speed-changing driving device of electric vehicle

Abstract

The invention discloses a two-gear speed-changing driving device of an electric vehicle, comprising a motor (17), a power transmission mechanism and a differential mechanism (12), and further comprising a friction clutch, wherein the motor (17) is respectively connected with the friction clutch and the differential mechanism (12) through the power transmission mechanism; and the power transmission mechanism is provided with an isolator (10). The two-gear speed-changing driving device of the electric vehicle has the advantages of ingenious structure design and convenience for manufacturing andinstallation; with the adoption of a two-gear speed-changing system formed by the friction clutch and the power transmission mechanism, gear shifting is flexible and reliable, the power conversion istable, no impacts or pauses exist, the reliability is high and the safety performance is improved; and meanwhile, the requirements of climbing and driving with a load are met.

Description

technical field [0001] The invention relates to a drive device for an electric vehicle, in particular to a two-speed variable speed drive device for an electric vehicle. Background technique [0002] At present, the motors used in electric tricycles are mainly differential motor systems with only one speed ratio. Because there is only one speed ratio, they often cannot meet the needs of high-speed driving on flat roads and load climbing at the same time; in order to solve this problem, many Manufacturers use jaw clutches for gear change systems. However, due to the relatively large change in the speed ratio of the two gears, when changing gears, the vehicle speed must be reduced or the power interrupted to change gears, which is unreliable and inconvenient. , due to a sudden change in speed, there will be an uncomfortable feeling of rushing forward or falling back; at the same time, due to the rigid fit of the gears when the power is switched, the gears in the power switchin...

AI Technical Summary

Problems solved by technology

[0002] At present, the motors used in electric tricycles are mainly differential motor systems with only one speed ratio. Because there is only one speed ratio, they often cannot meet the needs of high-speed driving on flat roads and load climbing at the same time; in order to solve this problem, many Manufacturers use jaw clutches for gear change systems. However, due to the relatively large change in the speed ratio of the two gears, when changing gears, the vehicle speed must be reduced or the power interrupted to change gears, which is unreliable and inconvenient. , due to a sudden change in speed, there will be an uncomfortable feeling of rushing forward or falling back; at the same time, due to the rigid fit of the gears when the power is switched, the gears in the power switching device collide with each other and make a knocking sound. It violates the common sense of mechanical design, and, in serious cases, the mutual impact of the gears will damage the gears and cause potential safety hazards

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