Tractors, as the main equipment for road transportation, are widely used for their advantages of strong specialization, large loading capacity and fast transportation. The tractor seat is the connecting device between the tractor head and the semi-trailer. Although it is not a very complicated and eye-catching component, it is the most important safety equipment of a semi-trailer tractor. If it is operated incorrectly or improperly maintained, it may be lead to serious safety incidents.
According to whether its support can move, it is divided into fixed type, mobile type and lift type. The left and right supports of the fixed traction seat are fastened on the base of the traction seat by bolts, and the base of the traction seat is then fixed to the beam of the tractor. Fixed is the most widely used one. There are many styles of mobile traction seat, and the structure is almost the same as that of the fixed type. The main reason is that the connection method between the traction seat base and the tractor beam adopts a porous or toothed design. Smooth connection with different trailers. Some mobile traction seats are also equipped with an automatic air pressure control device, which can push the traction seat to move back and forth in the chute through air pressure. The lift-type tractor is mainly used on the tractor of the port terminal. The tractor can move up and down in a certain range to adapt to the semi-trailer of different heights.
According to the different degrees of freedom, there are single and double degrees of freedom. The single-degree-of-freedom traction seat is also called the single-axis traction seat. It can only do about 80 vertical tilt. This type of towing seat has high driving stability and is suitable for high-speed, light-loaded and high-center-of-gravity semi-trailers driving on better roads. The disadvantage is that the frame is subjected to large torque because it cannot swing laterally. The dual-degree-of-freedom traction seat is also known as the dual-axis traction seat. It can swing laterally and longitudinally, and can protect the frame of heavy-duty transport tractors under different road conditions. Usually, the double-axle traction seat is much higher than the single-axle type, and the lateral stability is not good during the high-speed turning process of the vehicle, so this type of traction seat is rarely used in ordinary road transportation.
A tractor is a general large truck or semi-trailer that is towed by a tool between the front and the box, that is, the front of the car can be separated from the original box and tow other boxes, and the box can also be separated from the original. traction. The front of the car with driving ability is called a tractor, and the car with no traction and driving ability in the back is called a trailer, and the trailer is towed by the tractor. There are two ways to connect the tractor and the trailer: the first is that the front half of the trailer is placed on the traction saddle above the rear section of the tractor, and the bridge behind the tractor bears part of the weight of the trailer, which is the semi-trailer; the second The first type is that the front end of the trailer is connected to the rear end of the tractor. The tractor only provides forward pulling force and drags the trailer, but does not bear the downward weight of the trailer. This is the full trailer.
It is often used for the transportation of large quantities of goods within or between workshops, such as transportation from automobile manufacturing warehouses to assembly lines, and luggage transportation at airports.
