After more than 100 years of development, there have been more and more varieties of agricultural vehicles. Different countries have different classification methods and standards are not uniform. However, there are basically two classification methods: one is to classify the management of motor vehicles, and the other is to classify vehicles according to their uses and structural characteristics. Motorcycles are divided into three categories and fifteen types:
Pup joints varying lengths of tubing and casing are used to adjust the production string length as close
as possible to the desired value.All ofour pup joints are manufactured according to API specification
5CT latest edition withhigh quality. Also special specificationpup joint can be customized according to
customer's requirement.
Pup Joint,Tubing Pup Joint,Tubular Connections Pup Joint,Pup Joint For Tubing Hengshui Weijia Petroleum Equipment Manufacturing Co.,LTD , https://www.hswjpupjoint.com
First, according to management classification In order to be in line with international standards, to facilitate the expansion of the motorcycle import and export business management after the WTO, China has promulgated the national standard GB/T15089-94 "classification of motor vehicles." According to this standard, motorcycles belong to category L, ie less than four-wheeled motor vehicles. L class is divided into the following five categories:
L1 class - fitted with an engine with a displacement not exceeding 50ml, a two-wheeled vehicle with a maximum design speed not exceeding 40km/h. This actually refers to a light two-wheeled motorcycle.
L2 category - fitted with engines with a displacement of no more than 50ml, and a tricycle with a maximum design speed of no more than 40km/h. This actually refers to a light tricycle.
Type L3 - fitted with an engine with a displacement of more than 50ml, or a two-wheeler with a design speed of more than 40km/h. This is the usual two-wheeled motorcycle.
L4 class - fitted with an engine with a displacement of more than 50ml, or a vehicle with a design speed of more than 40km/h and three wheels arranged asymmetrically with respect to the longitudinal center plane of the vehicle (eg a three-wheeled motorcycle).
L5 class – vehicles with an engine displacement of more than 50ml, or a vehicle with a design speed of more than 40km/h, a maximum total mass of 1t or less, and three wheels arranged symmetrically with respect to the longitudinal center plane of the vehicle. It is usually called a three-wheeled motorcycle.
Second, according to the purpose and structural characteristics of the classification before 1980, due to the small amount of motorcycle production and social security, no motorcycle standards, then only two motorcycles (such as happiness 250, Qingqi 15) and three motorcycles ( Such as Dongfeng BM021) points.
After the motorcycle industry entered the development period, the output of the motorcycle industry has grown rapidly and the amount of social ownership has increased substantially. In order to facilitate industry management and traffic management, the standard for mopeds was first developed and implemented in 1984. The motorcycle standards were subsequently formulated and implemented in 1985. The development of the motorcycle industry has gradually embarked on the track of standardization and legal management.
China's motorcycle products are divided into two major categories: mopeds and motorcycles. According to the original standard, any engine with a displacement of no more than 50 ml and a maximum design speed of no more than 50 km/h is a moped; an engine with a displacement of 50 ml or more, or a motorcycle with a maximum design speed of more than 50 km/h. Lightweight motorcycles are divided into light two-wheeled motorcycles and light three-wheeled motorcycles.
(1) Two-wheeled vehicles: ordinary cars, mini-cars, off-road vehicles, general racing cars, micro racing cars, off-road racing cars (b) Side tricycles: ordinary side tricycles, special side tricycles (police cars, fire engines)
(c) Tricycles: Ordinary three-wheel (passengers, trucks), special tricycles (tank tankers, dump trucks, refrigerated trucks)
Some of the above models are defined as follows:
Two-wheeled vehicle: A motorcycle equipped with a driving wheel and a driven wheel.
Ordinary car: riding or riding frame, the basic diameter of the rim is not less than 304mm, and it is suitable for two-wheeled vehicles traveling on roads or urban roads.
Mini car: sitting or riding frame, the basic diameter of the rim is not more than 254mm, and it is suitable for two-wheeled vehicles traveling on the road or city road.
Off-road vehicle: Riding type vehicle frame, wide type steering wheel, off-road type tire, remaining vertical wheel gap and large ground clearance, suitable for two-wheeled vehicles traveling in non-highway areas.
Ordinary racing: riding frame, narrow direction, rear seat cushion, rim basic diameter of not less than 304 mm, equipped with high-power high-speed engine, dedicated to the race speed on specific track two-wheeled vehicles.
Miniature race car: sitting or riding frame, the basic diameter of the rim is not less than 254mm, equipped with high-power and high-speed engine, dedicated to the race car speed on the specific two-wheeler.
Off-road racing: Off-road performance, equipped with high-powered engines, two-wheeled vehicles dedicated to racing speed in off-road areas.
Special vehicles: Two-wheeled vehicles that have been modified to perform special tasks. For example, use a police car on the way.
Tricycle: A motorcycle with a sidecar on one side of the two-wheeler.
Ordinary side tricycle: Side tricycle used to carry occupants or cargo.
Special side tricycles: Side tricycles equipped with special equipment for special tasks. For example, police use tricycles.
Tricycle: A motorcycle equipped with two rear wheels symmetrically distributed with the front wheels.
Ordinary tricycle: A tricycle used to carry occupants or cargo.
Dedicated tricycles: Tricycles equipped with special equipment for the designated tasks.
In recent years, the popular scooter is a kind of sitting car, which is favored by users of all ages, men and women, and the engine displacement is from 50 ml to 125 ml because of its luxurious appearance, beautiful appearance, comfortable riding, and convenient operation. . Forced air-cooling, electric starting, stepless speed change, frame and engine are all covered with beautiful covers, but maintenance and adjustment are not very convenient. There is also a luxury riding car called "Prince's Car" which is a pet of a young man. The driver's seat is lower than the occupant's seat and it is easy to "expose" the girlfriend who is sitting behind to show off his style. The image.
The newly revised mandatory national standard GB7258-1997 "Technical conditions for the safe operation of motorized vehicles" defines the motor vehicle clearly: "Motor vehicles are those powered or driven by power units, on roads, for passengers, or And) Vehicles that carry goods or carry out special operations, including automobiles, trailers, trolleybuses, agricultural vehicles, motorcycles, mopeds, transport tractors, and wheeled machinery. In order to facilitate industry management, the National Standard GB7258-1997 “Technical Conditions for the Safe Operation of Motor Vehicles†promulgated by the State Bureau of Technical Supervision has been issued by the National Unified Declaration on the classification of assisting bicycles with millions of social possessions and controversies in recent years. The material clearly stated: "All kinds of so-called power-assisted bicycles powered by mechanical power devices belong to mopeds."