Chapter 1: What is a removable gooseneck trailer in Tanzania?
Chapter 2:What are the characteristics of a removable gooseneck trailer?
Chapter 3: What is the difference between a gooseneck and a removable gooseneck trailer?
The term "removable gooseneck" refers to a type of trailer used for transporting heavy equipment or cargo. The gooseneck in tanzania is the front part of the trailer that attaches to the truck hauling it. In the context of a load board in Tanzania, removable gooseneck trailer in Tanzania likely indicates that the trailers available for transport have a detachable front section, making it easier to load and unload heavy machinery or cargo.
On a load board, "removable gooseneck" typically refers to a type of trailer design where the front part of the trailer, known as the gooseneck, can be detached or removed from the main body of the trailer. This design allows for easier loading and unloading of heavy and oversized cargo, especially items that can be driven or rolled onto the trailer.
The ability to detach the removable gooseneck trailer in Tanzania can make the process of loading and unloading more efficient and can be especially useful for transporting heavy machinery, construction equipment, or other large items.
When you see "removable gooseneck" indicated on a load board, it means that the available trailers have this feature, offering versatility and convenience for certain types of cargo.
Mechanically detachable gooseneck operation process. During the process of disassembling the gooseneck, you must first separate the trailer's front bow from the traction base. During actual operation, the front part of the gooseneck may slip, and as the gooseneck continues to lower, the bottom corner of the front trailer will gradually approach the ground.
After the trailer travels for a period of time, the weight of the trailer will be reduced, and part of the weight will be shared with the front end of the semi-trailer wheels for support, but most of the goosenecks are in a cantilevered state, which can make the front end of the trailer tend to extend outward."] After the disassembly is completed, remove the retaining ring and move it forward until the retaining ring can be connected to the connecting plate so that the pin shaft can be completely separated from the trailer. Then, place the retaining ring to the rear of the trailer. Connected to the position of the steel belt. At this time, the rotating handle should be contracted as much as possible and kept in a clockwise running direction. The tractor can then move backward, and the gooseneck bow structure can slide back and forth on the traction plane. Under continuous rotation, the tooth-shaped raised parts can be smoothly separated from the slot. As the tractor continues to move forward, given that the gooseneck and the traction seat are connected to each other, for this reason, at this time The tractor is separated from the gooseneck semi-trailer, and the semi-trailer will tend to tilt under continuous operation.
After completing the loading of the semi-trailer, the above operations can be reversed and repeated. The tractor can continuously pull the gooseneck backward, so that the gooseneck finally stops in front of the trailer.
North America had developed a low-bed semi-trailer with a removable gooseneck trailer as early as the late 1930s. However, the structure of the vehicle was simple, and its detachable goose neck could not be adjusted up and down, making it difficult to align and reconnect with the semi-trailer. By the early 1940s, low-bed semi-trailers appeared that could rely on the winch and rope installed on the tractor to adjust the gooseneck up and down so that the gooseneck could be aligned with the semi-trailer. The disadvantage was that the tractor needed to provide other functions for this purpose. No special equipment (winches, etc.) is required.
By the late 1940s, with the development and application of hydraulic systems, detachable gooseneck low-bed semi-trailers also began to use hydraulic systems to provide the power required for gooseneck removal. Usually, the tractor is provided with hydraulic power equipment, and the gooseneck is equipped with a hydraulic system. However, this method also requires the tractor to provide special equipment (such as power take-off, etc.) that are not required for other functions, making it difficult to universalize the tractor. , multifunctional. Therefore, this method has not been widely used.
At present, the widely used removable gooseneck trailer in Tanzania mostly adopt the method of semi-trailer and gooseneck carrying their own power equipment. Although semi-trailers need to be equipped with a lot of additional equipment, such as small gasoline engines, starters, batteries, hydraulic pumps, hydraulic cylinders, etc., this method can improve the versatility of the tractor and realize drop-and-hook transportation, so it is widely used.
In addition to using the winch and hydraulic system to provide power, the compressed air from the tractor braking system can also be used as the power source for gooseneck removal121. The advantage of this method is that there is no need to provide additional equipment to increase the weight of the semi-trailer, nor to increase the weight of the semi-trailer. Corresponding maintenance costs, and it can be used normally in remote places with low temperatures in winter.
In addition to the powered detachable gooseneck low-bed semi-trailer, there is also a mechanically unpowered detachable goose-neck low-bed semi-trailer that is currently commonly used. This kind of semi-trailer has a simple structure and light weight. Although it requires corresponding modifications to the tractor and the loading and unloading process is relatively cumbersome, it is also widely used in long-distance transportation or heavy-duty transportation.
The cargo bed of a fixed removable gooseneck trailer in Tanzania has the longest length and the lightest weight, but it cannot be loaded and unloaded from the front end; the cargo bed of a mechanically detachable goose-neck low-bed semi-trailer is shorter than a fixed gooseneck and has a heavier weight than a fixed gooseneck. , the height of the cargo bed cannot be adjusted, but it can be loaded and unloaded from the front end; the air or hydraulic detachable gooseneck low-flat semi-trailer cargo bed has the shortest length and the heaviest weight, but the gooseneck disassembly and assembly is the fastest and the operation is the most convenient and easy. The height of the cargo bed It can also be adjusted as needed.
Detachable pre-low flatbed semi-trailers also have rigid suspension and elastic suspension. Rigid suspension is mostly used for heavy-duty low-flat semi-trailers with first-line dual axles and universal steering suspension mechanically detachable goosenecks. Leaf spring suspension has low cost and poor driving comfort: Although air suspension has high cost, it provides good driving comfort, can extend the service life of the frame, and can also be used to adjust (raise or lower) the height of the cargo platform (mostly used for air pressure Or hydraulically detachable goose pre-low flatbed semi-trailer).
Hydraulic removable gooseneck trailer are available in two types: ground-bearing and non-ground-bearing. When loading and unloading machinery and equipment on soft and muddy ground, the ground-bearing low-bed semi-trailers tend to press the sleepers into the ground and cannot remove them, making it difficult to remove them. Gooseneck lifting: The non-ground-bearing low-flat semi-trailer is suitable for various ground conditions and has a wide range of applications.
Low-bed semi-trailers are usually used to transport heavy-duty vehicles (such as tractors, buses, special vehicles, etc.), rail vehicles, mining machinery, forestry machinery, agricultural machinery (such as harvesters, wheeled tractors, conveyors, etc.), engineering For machinery (such as excavators, bulldozers, loaders, pavers, cranes, etc.) and other heavy-duty goods, the lower the center of gravity, the better the stability and safety, and the greater the ability to transport over-height goods and pass overhead obstacles.
Low-bed semi-trailers usually use a concave beam (or well-shaped) frame, that is, the front section of the frame is a goose (the traction pin at the front end of the goose is connected to the traction saddle on the tractor, and the rear end of the goose neck is connected to the semi-trailer frame). The middle section is the cargo platform (the lowest part of the frame), and the rear section is the wheel frame (including wheels). When loading mechanical equipment on an ordinary low-bed semi-trailer, that is, a fixed gooseneck low-bed semi-trailer, the mechanical equipment is usually loaded from the rear end of the semi-trailer, that is, by moving the mechanical equipment from the rear wheel frame or removing the wheels, and then Secure mechanical equipment to semi-trailer. Since the rear wheel carrier is always higher than the loading platform, this loading method has many disadvantages. First of all, when moving mechanical equipment from the rear wheel frame, a suitable slope or ladder needs to be provided. If necessary, a fairly long ladder is required to provide a slope suitable for the up and down of heavy mechanical equipment. Loaded in this way, the mechanical equipment is prone to slipping or toppling from the ladder: when it leaves the springboard, it is also easy to fall onto the semi-trailer cargo bed, causing excessive impact loads on the cargo bed. If the wheels are removed and the semi-trailer body touches the ground to load mechanical equipment, a winch or lifting machinery must be used to lift the vehicle body to a height where the wheels can be reinstalled when the wheels are returned. Therefore, additional equipment is required. Such an operation is time-consuming and carries certain risks.In addition to loading and unloading from the rear end of the low-bed semi-trailer, it can also be loaded and unloaded from both sides. Loading and unloading from both sides also has many disadvantages. For example, loading and unloading operations require a wide operating area, which is difficult to achieve under normal operating conditions. In addition, loading and unloading from both sides is only suitable for some specific goods, such as crawler-type mechanical equipment that can travel on its own (during the loading and unloading process, sleepers are generally required to provide a suitable slope, and the mechanical equipment can easily damage the goods when the direction is changed on the cargo platform. The platform may be unevenly loaded, etc.) or overloaded with ultra-high cargo (such as the lifting height required for loading and unloading cargo is limited). Due to the potential shortcomings of the above loading and unloading methods, the front loading and unloading method is usually used abroad to eliminate these problems. The front loading and unloading method has become the preferred mode of transportation for the transportation of heavy machinery and equipment.
There are two forms of front loading and unloading, namely foldable gooseneck and removable gooseneck trailer in Tanzania . There is a low-bed semi-trailer with a gooseneck that can be folded up and down. However, the disadvantage of this type of vehicle is that when the goose is pre-lowered to contact the ground for loading and unloading machinery and equipment, the traction pin is often pressed into the muddy ground, causing the traction pin and the traction The pin plate is stained with dirt and other debris. There is also a foldable gooseneck low-bed semi-trailer. The gooseneck can be folded or swung from the front end of the semitrailer to the left (right) side, thereby removing the obstacle to loading and unloading at the front end of the semitrailer, while one end of the gooseneck is still connected to the semitrailer. Maintain a connected state: This low-bed semi-trailer with a gooseneck structure requires the tractor to be modified accordingly, and sleepers are required to load and unload engineering machinery and other equipment from the front end of the semi-trailer. However, the gooseneck cannot be folded in a narrow operating radius area. neck, therefore, this type of low-bed semi-trailer has fewer practical applications. The detachable gooseneck low-bed semi-trailer has a gooseneck that can be completely detached from the semi-trailer so that the front end of the semi-trailer is lowered to contact the ground but remains connected to the rear end of the tractor. After loading or unloading, the tractor drags the gooseneck back and aligns with the front end of the semitrailer. The semitrailer reconnects with the gooseneck and returns to the transport state.