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From the classification point of view, the reduction shaft belongs to the drive shaft. It is composed of the main reducer, differential, half shaft, drive shaft housing and other components. It is at the end of the vehicle transmission system. Its function is to change the speed and torque of the transmission and transmit it Give the vehicle drive wheels.

The term "hostel trailer" has become more and more common in recent years. What is a caravan? According to the regulations of GB7258-2017 "Technical Conditions for the Safety of Motor Vehicle Operation", hostel trailer refers to the trailer equipped with sleeping gear (which can be converted from tables and chairs) and other necessary living facilities for travel and camping.

The axle is one of the very important parts on the semi-trailer, which is directly related to the bearing, driving and braking of the vehicle, and the engine and transmission are called the three core assembly of the trailer, which plays a decisive role in the stability and safety of the vehicle.Maintenance-free trailer axle refers to the maintenance and maintenance cycle is relatively long axle, general oil lubrication instead of grease lubrication, in the hub unit with gear oil, so that the hub and oil seal form gear oil storage space, let the bearing soaked in gear oil, to ensure its full l

Maintenance-free trailer axles appear more frequently on some high-end freight models, and the purpose of its application is to extend the maintenance cycle of the wheel end, reduce the frequency of maintenance, improve the efficiency of vehicle operation, and reduce the downtime caused by maintenance.The so-called maintenance-free axle is to replace grease lubrication with oil lubrication, fill the gear oil in the hub unit, the hub and the oil seal form a storage space for the gear oil, and soak the bearing in the gear oil to ensure its full lubrication capacity to achieve longer maintenance

With the continuous development of vehicle technology, the application of oil lubrication on the wheel end of the rear axle of the semi-trailer is becoming more and more extensive. Compared with ordinary grease lubricated hubs, the biggest advantage of oil lubrication is that it can achieve long maintenance and prolong the service life of wheel end accessories. Relevant data show that about 95% of trailer axles in the North American market use liquid gear oil lubrication technology.Lubricating oil and grease are two commonly used lubricants on vehicles.

In summer, there is more rain, and vehicles are prone to soaking in water, especially in those low-lying places.Although the body of the trailer is relatively higher than that of ordinary vehicles, there is still a risk of soaking in water if it encounters a violent rainstorm.

In China's transportation industry, semi-trailer is a more widely used model, which plays a great role in the transportation of goods. According to the different types of goods transported, the semi-trailer can be subdivided into columnar plate, warehouse grid, low flat plate, van, tank, container, skeleton and other types.Under normal circumstances, the semi-trailer itself does not have a driving force, and often needs to use the power of the tractor to achieve driving, that is, the semi-trailer needs to be dragged forward by the tractor.

In the field of logistics and transportation, there is such a batch of goods, their huge volume, surprising weight, length, width, weight, etc., beyond the legal limits, and even beyond the limits of roads and Bridges and culverts can be passed, and the structure can not be split.

Flat-bed dump trucks are more common in the transportation of high-density bulk cargo such as sand and gravel. When they go to the household, they are only in the form of a flatbed.

Recently, the Ministry of Transport formulated and announced the "Railway Transportation Service Quality Supervision and Management Measures", which stated that to improve the informatization and intelligence level of transportation services, encourage railway transportation enterprises to strengthen coordination and cooperation with other transportation mode enterprises, share information resources, and carry out multimodal Intermodal.The road-rail combined transport is one of the multimodal transport.