Foldable electric bicycle

Abstract

The invention provides a foldable electric bicycle. The foldable electric bicycle comprises a frame, a front sway, a front wheel, a rear wheel, a pedal, a motor and a transmission device. The front sway, the front wheel, the rear wheel, the pedal, the motor and the transmission device are all arranged on the frame. The frame comprises a steering rod, a beam and a connecting rod. When the beam is lifted, the steering rod, the beam and the connecting rod form a line-shaped structure. In the front sway folding process, it is only needed to press pressing caps, and then two handlebars fall to be folded within one second. The transmission device is a wedge-shaped self-locking transmission device or pressure transmission device, traditional chain or belt transmission is replaced with static friction force transmission between a driving shaft and a driven disc, then a high transmission ratio can be achieved under the same boundary dimension, and in cooperation with a high-speed motor, the size and weight of a transmission structure can be reduced to the maximum degree. Folding and unfolding of the front sway, a body and the pedal are convenient and fast, the size is greatly reduced after folding, and then the foldable electric bicycle is convenient to carry.

Description

technical field [0001] The invention relates to a folding electric bicycle. Background technique [0002] Foldable electric bicycles, although they are foldable, have an overall weight of more than 20 kilograms, and feel heavy and inconvenient to carry. Although some use aluminum alloy materials and simplified folding designs for the frame, the general weight is generally It weighs more than 15 kilograms, and the photoelectric motor weighs more than 4 kilograms, so it still feels heavy to carry. [0003] An important reason why the current foldable electric bicycles and electric scooters are heavy is that the wheel speed is low. Generally, the wheel rim and the motor are integrated, but the motors of this structure are often heavier than 3 kg. If a high-speed motor with a lighter weight is used, in order to meet the requirements of the driving speed of the electric vehicle, the motor speed must be reduced through the transmission device, which requires a large transmission ...

AI Technical Summary

Problems solved by technology

[0002] Foldable electric bicycles, although they are foldable, have an overall weight of more than 20 kilograms, and feel heavy and inconvenient to carry. Although some use aluminum alloy materials and simplified folding designs for the frame, the general weight is generally More than 15 kg, the photoelectric motor is more than 4 kg, it still feels heavy to carry

[0003] An important reason why the current foldable electric bicycles and electric scooters are heavy is that the wheel speed is low. Generally, the wheel rim and the motor are integrated, but the motor of this structure is often heavier than 3 kg.

If a light-weight high-speed motor is used, in order to meet the requirements of the driving speed of the electric vehicle, the motor speed must be reduced through the transmission device, which requires a large transmission ratio. If a traditional chain or belt transmission device is used, the sprocket and If the diameter of the pulley is made large, the volume and weight of the transmission device will also increase, and the transmission noise will be very large.

Even if the two-stage drive is used, the volume and weight are the same, so only a heavy ordinary motor can be used as the drive; but in spite of this, this ordinary motor and the traditional chain or belt drive still have the problem of large size and heavy weight , resulting in a large overall size of the car body, which is not conducive to folding operation and storage

Therefore, if the transmission device can be reasonably modified and combined with a high-speed motor, the weight and overall size of the car body may be greatly reduced.

[0004] In addition, many folding electric bicycles usually have a taller and longer body and take up a lot of space. Therefore, when folding and storing, the body must be folded to save space

At present, there are many ways to fold the car body on the market. The more common one is to fold the car body in half. Although this folding method can make the car body shorter, it also becomes thicker, which is not conducive to carrying, and the folding process is time-consuming. and strenuous

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