In life, we have used all kinds of bicycles since childhood. How much do you know about the main bicycle accessories? Next, the editor of Shenzhen Zhihangda Technology Co., Ltd. will give you a detailed introduction:
Bicycle accessories is a collective term for all parts and accessories of the bicycle body. According to the large structural frame of the car body, it can be divided into several categories: frame, tire, pedal parts, front fork assembly, chain, flywheel and so on.
Among the 25 accessories of bicycle frame, tires, pedals, brakes, chains, etc., all the basic components are indispensable. Among them, the frame is the skeleton of the bicycle, and it bears the heaviest weight of people and goods. According to the working characteristics of each accessory, it can be roughly divided into a guiding system, a driving system, and a braking system.
Main accessories
Frame
The frame components are the basic structure of the bicycle, as well as the skeleton and main body of the bicycle. Other components are also directly or indirectly installed on the frame. There are many structural forms of frame components, but the overall structure can be divided into two categories: men's frames and women's frames.
The frame is generally welded and assembled by ordinary carbon copper tubes. In order to reduce the weight of the tube and increase its strength, higher-end bicycles are made of low-alloy steel tubes. In order to reduce the resistance of fast driving, some bicycles also use streamlined steel pipes.
Because the bicycle is driven by the human body's own driving force and riding skills, the frame becomes an important structural body that can withstand the impact load generated by the bicycle during driving and whether it can carry the human body comfortably and safely. The manufacturing accuracy of the frame components The pros and cons will directly affect the safety, stability and briskness of riding. Generally speaking, the spokes are of equal diameter. In order to reduce gravity, there are also variable-diameter spokes with large ends and small in the middle. In order to reduce air resistance, the spokes are made into flat streamlined spokes.
Tires
There are two types of soft-sided tires and hard-sided tires. The soft-sided tire has a wide cross-section, can completely wrap the inner tube, and has a relatively large landing area, which is suitable for driving on various roads. Hard-sided tires are light in weight, have a small footprint, and are suitable for driving on flat roads. They have the advantages of low resistance and light driving.
The pattern on the tire is to increase the friction with the ground. The tires of mountain bikes are very wide and the pattern is deeper, which is suitable for off-road and mountain use. The tire width of road bikes is particularly narrow, and the pattern is lighter, so it is suitable for road sites.
Pedal
The pedal components are assembled on the left and right cranks of the central axis components. It is a device that converts the horizontal force into rotation force. When the bicycle is riding, the pedal force is first transmitted to the pedal components, and then the pedal shaft rotates the cranks and chainrings. , The middle axle, the chain flywheel, the rear wheel rotates, so that the bicycle can move forward. Therefore, whether the structure and specifications of the pedal components are appropriate will directly affect whether the rider's foot position is appropriate and whether the bicycle can be driven smoothly.
Pedals: can be divided into integral pedals and combined pedals. No matter what style of pedals, they must have a pedal surface, must be safe and reliable, have a certain anti-skid performance, and can be made of rubber, plastic or metal materials. The pedals must be flexible.
Fork assembly
The front fork assembly is located in the front part of the bicycle structure. Its upper end is connected with the handlebar part, the frame part is matched with the front tube, and the lower end is matched with the front axle part to form a bicycle guiding system.
Rotating the handlebars and the front fork can change the direction of the front wheel, which serves as a guide for the bicycle. In addition, it can also play a role in controlling the driving of the bicycle.
The force of the front fork is a cantilever beam, so the front fork must have sufficient strength and other properties.
Chain
Chains, also known as car chains and roller chains, are installed on the connecting wheel and the flywheel. Its function is to transfer the pedaling force from the crank and the sprocket to the flywheel and the rear wheel to drive the bicycle forward.
Sprocket: made of high-strength steel to ensure that it reaches the required tensile force.
flywheel
The flywheel is screwed and fixed on the right end of the rear axle with internal threads, keeping the same plane with the sprocket, and connected with the sprocket through a chain to form the driving system of the bicycle. From the structure, it can be divided into two categories: single-stage flywheel and multi-stage flywheel.
Single-stage flywheel, also known as single-sprocket flywheel, is mainly composed of outer cover, flat gear and core, jack, jack spring, washer, wire stop and steel balls.
The working principle of the single-stage flywheel: when the pedal is stepped forward, the chain drives the flywheel to rotate forward. At this time, the inner teeth of the flywheel and the jack are involved, and the rotating force of the flywheel is transmitted to the core through the jack, and the core drives the rear axle and The rear wheel turns and the bicycle moves forward.
When the pedal is stopped, the chain and the jacket do not rotate, but the rear wheel still drives the core and the jack to rotate forward under the action of inertia. At this time, the inner teeth of the flywheel slide relatively, thereby compressing the core to the core. In the notch of the child, Qianjin compressed the spring again. When the jack tooth top slides to the top of the inner teeth of the flywheel, the jack spring is compressed the most, and then slides forward slightly, the jack is bounced on the tooth root by the jack spring, making a "click" sound. As the core rotates faster, Qianjin quickly slides on the inner teeth of each flywheel, making a "click" sound. When the pedals are stepped in the reverse direction, the jacket rotates in the reverse direction, which will accelerate the sliding of the jin, making the "click" sound more rapid. Multi-stage flywheel is an important part of bicycle transmission device.
The multi-stage flywheel is based on the single-stage flywheel, adding several flywheel pieces, combined with the sprocket on the bottom axle, to form a variety of different transmission ratios, thereby changing the speed of the bicycle; Single-section series of folding riser manufacturers- Shenzhen Zhihangda Technology Co., Ltd. welcomes you to come to consult and negotiate...