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June 11, 2021
1. The gooseneck is composed of an outer gooseneck frame, an inner gooseneck frame, a first hydraulic cylinder, a second hydraulic cylinder, a connecting plate and a first pin. The lower part of the gooseneck inner frame is hinged on the gooseneck outer frame The cylinder end of the first hydraulic oil cylinder is hinged on the upper part of the gooseneck outer frame, and the piston rod end on it is hinged on the upper part of the gooseneck inner frame, and the connecting plate is fixed on the lower part of the gooseneck inner frame , And a second pin hole is opened on the frame, a second pin is vertically fixed on the front end surface of the frame, and the second pin is matched with the second pin hole. The cylinder of the second hydraulic cylinder The end is hinged on the gooseneck inner frame, and the piston rod end thereon is hinged on the first pin, the first pin slides on the gooseneck inner frame, and the upper end of the frame is provided with a first A pin hole, the first pin hole and the first pin are used in cooperation.
2. An anti-falling mechanism is provided on the gooseneck outer frame. The anti-falling mechanism is composed of a support frame and a third hydraulic cylinder. One end of the support frame is hinged on the front of the gooseneck outer frame, and the other end is connected to the first The piston rod ends of the three hydraulic oil cylinders are hinged, and the cylinder end of the third hydraulic oil cylinder is hinged on the rear part of the gooseneck outer frame.
3. The two ends of the hinge shaft between the support frame and the third hydraulic cylinder are rotatably provided with rollers, and the rollers can abut on the beam of the tractor. A climbing ladder is hinged on both sides of the front end of the frame.
After adopting the above structure, the utility model has the advantages compared with the prior art: a low-plate semi-trailer with a detachable gooseneck includes a gooseneck, a frame, a first hydraulic cylinder, a second hydraulic cylinder, and a second hydraulic cylinder. A pin, a second pin, etc., through the cooperation of the first pin and the first pin hole, and the cooperation of the second pin and the second pin hole to realize the detachable connection between the gooseneck inner frame and the frame, through The first hydraulic oil cylinder realizes the lifting and lowering of the frame, and the transportation vehicle can be moved from the front end of the frame to the frame as a whole. The loading is simple and quick, and the loading efficiency is improved. When the loaded vehicle moves, the center of gravity is low and the safety factor is high.
North America had developed a lowbed trailer with a detachable gooseneck as early as the late 1930s. However, the structure of the vehicle was simple. The detachable gooseneck could not be adjusted up and down, and it was difficult to align and reconnect with the semi-trailer. By the early 1940s, there was a low-platform semi-trailer that could rely on the winch and rope installed on the tractor to adjust the gooseneck up and down to facilitate the alignment of the gooseneck with the semi-trailer.
The disadvantage was that the tractor was required to provide something else for this purpose. Special equipment (winch, etc.) not required for the function. By the late 1940s, with the development and application of hydraulic systems, detachable gooseneck trailer also began to use hydraulic systems to provide the power required for gooseneck removal. Usually, tractors provide hydraulic power equipment, and goosenecks have hydraulic systems, but this method also requires tractors to provide special equipment (such as power take-offs) that are not needed for other functions, and it is difficult to achieve universalization of tractors , Multifunctional. Therefore, this method has not been widely used.
At present, the widely used detachable gooseneck trailer mostly use semi-trailers and gooseneck self-contained 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 the use of winches and hydraulic systems to provide power, compressed air from the braking system of the tractor can also be used as the power source for the removal of the gooseneck.
The advantage of this method is that there is no need to provide additional equipment to increase the weight of the semi-trailer, and there is no need to increase the corresponding The maintenance cost is low, and it can be used normally in remote places with low temperature in winter. In addition to the power detachable gooseneck low-bed semi-trailer, there is also a kind of machinery that is currently commonly used, that is, an unpowered detachable gooseneck low-bed semi-trailer. This semi-trailer has a simple structure and light weight. Although the tractor needs to be modified accordingly and the loading and unloading process is relatively complicated, it is widely used in long-distance transportation or heavy-duty transportation.
Detachable gooseneck trailer feedback from the customer
The fixed gooseneck trailer has the longest cargo platform and the lightest weight, but it cannot be loaded and unloaded from the front; the mechanically detachable gooseneck trailer has a shorter cargo platform than a fixed gooseneck and its own weight is heavier , The height of the cargo platform cannot be adjusted, but it can be loaded and unloaded from the front; the air or hydraulic detachable gooseneck low flatbed semi-trailer has the shortest cargo platform length and the heaviest weight. It can also be adjusted as needed.
Drawing of the 4 axle detachable gooseneck trailer with dolly
The detachable gooseneck trailer also has rigid suspension and elastic suspension. Rigid suspension is mostly used for heavy-duty lowbed trailer with a detachable gooseneck for first-line dual-axle and universal steering suspension machinery. The leaf spring suspension has low cost and poor driving comfort; although the cost of air suspension is high, the driving comfort is good, which can increase 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 hydraulic detachable gooseneck trailer).