Integrated multi-shift speed changing power mechanism of electric motorcycle

Abstract

The invention relates to an integrated electric motorcycle multi-stage variable-speed power plant, which comprises a direct-current motor, a gearbox and an electric shifting mechanism, and is characterized in that a main driving shaft in the gearbox is sequentially provided with a first-stage driving gear, a second-stage driving gear, a third-stage driving gear, a fourth-stage driving gear and a reduction gear; a driven shaft is provided with a first-stage driven gear, a second-stage driven gear, a third-stage driven gear and a fourth-stage driven gear, and directly connected with a wheel hubin a matching way; and a shell of the direct-current motor and a box body of the gearbox are integrated into a whole, a gear at the end of a rotating shaft is meshed with an intermediate gear which is meshed with the reduction gear on the main driving shaft, and the motor is connected with a controller, a power supply and a starting switch by a lead. The power plant not only has compact structureand strong integrity, but also leads the radiating condition of the direct-current motor to be improved significantly; and the speed is adjusted by driving a variable-speed drum through a stepping motor, thus leading the motorcycle to have enough traction when driving on an upslope, and be speeded up when driving on a level road.

Description

technical field [0001] The invention relates to a power transmission device for an electric vehicle, in particular to an integrated multi-speed variable speed power device for an electric motorcycle. Background technique [0002] The power transmission device of the existing fuel motorcycle includes a gasoline engine and a speed change transmission mechanism connected with it as a whole. It has a compact structure, and its output torque and rotating speed can be adjusted according to road conditions, so it has strong adaptability. In recent years, fuel motorcycles have become a common means of transportation. As the contradiction between energy supply and demand becomes increasingly tense, and the requirements for environmental protection gradually increase, the shortcomings of fuel motorcycles are also becoming more and more obvious. Aiming at the shortcomings of fuel motorcycles, people have developed electric motorcycles that use batteries as energy sources. Such as the...

AI Technical Summary

Problems solved by technology

Such as the wheel-hub electric motorcycle, the drive motor of this electric motorcycle is installed in the center of the rear hub to directly drive the rear wheel. Although it does not consume fuel and is beneficial to environmental protection, it has the following shortcomings: first, the uphill traction is not enough, Second, driving on flat roads is slow

Although the electric motorcycle can be shifted and adjusted mechanically, its structure is not compact, and the heat dissipation of the high-speed DC motor is poor.

Obviously, the power engine of the existing electric motorcycle does not fundamentally solve the existing problems

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