The principle of children's bicycles mainly includes the following key parts:
Transmission system: Children's bicycles realize power transmission through components such as pedals, cranks, middle shafts, toothed discs, chains and flywheels. When the rider pedals, the force is transmitted to the chain through the cranks, middle shafts and toothed discs, and then the chain drives the flywheel to rotate, and finally drives the rear wheel to rotate, making the bicycle move forward.
Gear system: Children's bicycles are usually equipped with large gears and small gears connected by chains. The large gear is connected to the pedals, and the small gear is connected to the rear wheel. When the rider pedals one circle, the large gear rotates one circle, and the small gear also rotates, but the number of circles depends on the gear ratio of the two. For example, if the large gear has 36 teeth and the small gear has 12 teeth, then the small gear will rotate three times when pedaling one circle.
Wheels and tires: The diameter of the wheel and the friction of the tire have a direct impact on the distance traveled by the bicycle. The circumference of the wheel multiplied by the number of circles can calculate the distance traveled by the bicycle. For example, if the circumference of the wheel is 1 meter and it turns three times, the bicycle travels 3 meters.
Brake system: The brake system of a children's bicycle works on the principle of levers. The rider can control the braking of the front and rear wheels through the brake handle to ensure safe parking.
Frame and handlebars: The frame is the basic structure of the bicycle, supporting the entire bicycle and protecting the internal mechanical parts. The handlebars on the handlebars convert the rider's steering action into the steering of the bicycle through the principle of levers.
Through the coordinated work of these parts, children's bicycles can achieve stable driving and flexible control.
