In today's daily life, there are more and more convenient and easy-to-use means of transport that can serve the travel needs of people such as cars, motorbikes, airplanes. , train... But I still especially love the kind of vehicle that appeared very early, compact and can be useful for commuting, which is the bicycle - a familiar application that is also very important. important.

Bicycles appeared first in Europe and were imported into our country in the twentieth century. Bicycle is a means of movement by human power, simple structure, easy to control… very convenient for traveling. In 1790, the first bicycle appeared, starting with the Célérifère, invented by Count Sivrac. It was a wooden machine, with no wheels to drive; Turning requires vigorous shaking of the front of the vehicle.

However, in 1849, it is possible that a German mechanic, Heinrich Fischer, invented the pedal before the Michaux brothers. The front wheel pedal makes the front wheel larger (larger than the rear wheel) to increase the distance traveled in each lap. This innovation gave the device a new name, bicycle. In Vietnam, bicycles are being gradually replaced by motorbikes in big cities. But in rural areas, bicycles are still a means of transport chosen by many people.

Bicycles are composed of: motion system, control system and transport system. The transmission system consists of the chassis, pedals, middle axle, middle ball bearing, chain, gearshift disc, two axles, ball bearings and two front and rear wheels. When riding, people sit on the saddle, handle the handlebar, foot pedal makes the axle move, the disc moves along the chain, rotates the cassette and rear wheel, creating thrust for the car to move forward. .

The control system includes a handlebar with two handles that can be rotated right and left easily thanks to the ball-bearing neck, in order to steer the front wheel as desired. The handlebars are both the handlebars and let the riders firmly grasp the balance. The brake unit, the brake line transmits pressure to the brake caliper. When squeezing the brake lever, the brake pads press on the sides of the rim, creating a frictional force that reduces the wheel's movement speed and the car will slow down or stop when necessary. Thanks to the brake system, cyclists can go as fast or slow as they want

.

The conveying system consists of a saddle, a pass unit or a shopping cart. The saddle mounted on the chassis is the seat of the rider. Seamless cargo pass mounted on the back of the saddle based on the axle of the rear wheel, can carry weights. Cart mounted at the front of the vehicle based on the front wheel axle.

In addition to the above parts, the bike also has fenders mounted on the rear and front wheels, chain guards that cover the top of the chain, a dynamo powered light mounted on the front of the fork, There is a signal light installed at the back of the car, a bell is installed near the handle to ask for directions when needed.

Bicycles are a very convenient means of transport on short distances such as in a village or in a small city. Bicycles move by human power, so they do not pollute the environment. Cyclists use only a small amount of their effort but cover a very long distance. Cycling is also a very beneficial way to exercise the body like exercise and sports.

During the two wars of resistance against the French and the Americans, the bicycle was an important means of transport, contributing to transporting food and weapons on the Truong Son route to wipe out the invaders from the territory of reunification. Today, the bicycle is a very convenient means of transport for all walks of life, especially today's students on the road to knowledge.

In big cities, the number of motorbikes is too much, causing traffic congestion and environmental pollution. In the future, when public transport is widely developed, bicycles are still indispensable personal means, both clean and convenient. Over time, the bicycle was also gradually improved and improved, the wooden wheels were replaced by air wheels, moving much smoother and lighter, the moving speed was also faster. Today, bicycles also have many types of vehicles, diverse and rich models such as mini cars, men's bicycles, off-road vehicles, racing cars...

Bicycle is a popular vehicle in people's daily life, serving the needs of moving and commuting. Today, because of the appearance of more modern means of transport, bicycles are no longer a widely used and popular vehicle as before, however, bicycles bring a lot of benefits, not only in terms of environment but also for human health. Therefore, bicycles are still the choice of many users.

In today's daily life, there are more and more convenient and easy-to-use means of transport that can serve the travel needs of people such as cars, motorbikes, airplanes. , train... But I still especially love the kind of vehicle that appeared very early, compact and can be useful for commuting, which is the bicycle - a familiar application that is also very important. important.

Bicycles appeared first in Europe and were imported into our country in the twentieth century. Bicycle is a means of movement by human power, simple structure, easy to control… very convenient for traveling. In 1790, the first bicycle appeared, starting with the Célérifère, invented by Count Sivrac. It was a wooden machine, with no wheels to drive; Turning requires vigorous shaking of the front of the vehicle.

However, in 1849, it is possible that a German mechanic, Heinrich Fischer, invented the pedal before the Michaux brothers. The front wheel pedal makes the front wheel larger (larger than the rear wheel) to increase the distance traveled in each lap. This innovation gave the device a new name, bicycle. In Vietnam, bicycles are being gradually replaced by motorbikes in big cities. But in rural areas, bicycles are still a means of transport chosen by many people.

Bicycles are composed of: motion system, control system and transport system. The transmission system consists of the chassis, pedals, middle axle, middle ball bearing, chain, gearshift disc, two axles, ball bearings and two front and rear wheels. When riding, people sit on the saddle, handle the handlebar, foot pedal makes the axle move, the disc moves along the chain, rotates the cassette and rear wheel, creating thrust for the car to move forward. .

The control system includes a handlebar with two handles that can be rotated right and left easily thanks to the ball-bearing neck, in order to steer the front wheel as desired. The handlebars are both the handlebars and let the riders firmly grasp the balance. The brake unit, the brake line transmits pressure to the brake caliper. When squeezing the brake lever, the brake pads press on the sides of the rim, creating a frictional force that reduces the wheel's movement speed and the car will slow down or stop when necessary. Thanks to the brake system, cyclists can go as fast or slow as they want

.

The conveying system consists of a saddle, a pass unit or a shopping cart. The saddle mounted on the chassis is the seat of the rider. Seamless cargo pass mounted on the back of the saddle based on the axle of the rear wheel, can carry weights. Cart mounted at the front of the vehicle based on the front wheel axle.

In addition to the above parts, the bike also has fenders mounted on the rear and front wheels, chain guards that cover the top of the chain, a dynamo powered light mounted on the front of the fork, There is a signal light installed at the back of the car, a bell is installed near the handle to ask for directions when needed.

Bicycles are a very convenient means of transport on short distances such as in a village or in a small city. Bicycles move by human power, so they do not pollute the environment. Cyclists use only a small amount of their effort but cover a very long distance. Cycling is also a very beneficial way to exercise the body like exercise and sports.

During the two wars of resistance against the French and the Americans, the bicycle was an important means of transport, contributing to transporting food and weapons on the Truong Son route to wipe out the invaders from the territory of reunification. Today, the bicycle is a very convenient means of transport for all walks of life, especially today's students on the road to knowledge.

In big cities, the number of motorbikes is too much, causing traffic congestion and environmental pollution. In the future, when public transport is widely developed, bicycles are still indispensable personal means, both clean and convenient. Over time, the bicycle was also gradually improved and improved, the wooden wheels were replaced by air wheels, moving much smoother and lighter, the moving speed was also faster. Today, bicycles also have many types of vehicles, diverse and rich models such as mini cars, men's bicycles, off-road vehicles, racing cars...

Bicycle is a popular vehicle in people's daily life, serving the needs of moving and commuting. Today, because of the appearance of more modern means of transport, bicycles are no longer a widely used and popular vehicle as before, however, bicycles bring a lot of benefits, not only in terms of environment but also for human health. Therefore, bicycles are still the choice of many users.