Rough terrain forklift is a kind of engineering vehicle that can load, unload, stack and carry things on slopes and uneven ground.Just as the general forklift, it can install forks or replace a variety of accessories to improve operation efficiency.
Internal combustion engines are widely used in rough terrain forklifts. Since the forklift was created in the early 1920s, the internal combustion engine has been continuously providing power for this material handling machinery. Over the past 100 years, gasoline and diesel engines have not only undergone complete changes in appearance, but also in the process of technological improvement, the power of internal combustion engine has become stronger, more economical, more environmental friendly and lower noise. With the passage of time, forklift manufacturers around the world began to pay more and more attention to the comfort and safety of forklifts. The emission and noise standards of internal combustion engines have been strictly regulated. Most of rough terrain forklifts's engines are diesel engines, which are mainly due to low cost, convenient procurement and low investment in energy consumption and maintenance. The diesel engine has high reliability, easy maintenance, strong power and high efficiency.
The mechanism for lifting goods is also called gantry. It is composed of inner portal frame, outer portal frame, fork frame, fork, sprocket, chain, lifting cylinder and tilt cylinder. The forklift gantry is the main load-bearing structure of the forklift pick-up device. The use of new materials and the manufacture of a rigid structure with higher bending capacity and high strength can reduce the weight of the forklift gantry and improve the stability and safety of the goods at a higher height during landing. In the automatic warehouse, high-level stacker with a lifting height of 15-18m is not uncommon. In order to further ensure the movement of goods at this height, The transportation equipment is equipped with a special anti vibration and impact compensation system to prevent uneven floor. Separate (or double tilt cylinders are used in special cases). At present, the gantry of another vehicle completes the tilting action through two hydraulic cylinders. One end of the hydraulic cylinder is fixed in the middle of the gantry and the other end is fixed in the lower part of the chassis. One of the tilt cylinders is fixed on the top of the cab and the other is fixed in the middle of the gantry. This not only increases the rigidity of the gantry, but also provides an unimpeded vision for forklift drivers, and increases the safety of work. For forklifts with telescopic gantry, only tilt the fork when placing it at a high place or when placing it at a high place.
One of the most common working mechanisms of forklift is the shift mechanism of side moving fork. Lateral displacement forks are usually built into the bracket, so there is little loss of load capacity. The lateral displacement value of the fork is specified by the EU standard: for forklifts with a maximum bearing capacity of less than 5 tons, the left-right lateral displacement shall not exceed 100 mm. In this case, the redundant bearing capacity will not be reduced. The integrated lateral movement mechanism and other modern accessories can provide greater redundant load capacity because of the decreasing size and weight of its protrusions. The new lateral displacement mechanism has a box shape contour: through this design, the fork and the end of the goods can be better viewed, so as to improve the safety of the driver.
The mobility and speed of forklift depend largely on parts such as tires. Until the late 1930s, forklift wheels were usually equipped with solid tires. First, paste a ring of dense and wear-resistant rubber ring onto the steel ring, and then press it together on the cylindrical rim. In the first rough combination, the rim usually skidded with the rubber ring. Now, this problem has been completely solved: the shape of the rim and the edge of the tire should accurately correspond to each other. Later, in order to ensure that the forklift will not leave traces on the floor when braking and turning, pneumatic tires and super elastic tires were used. In terms of tire application, there are great differences between the U.S. market and other markets. Solid tires, mainly in the United States. In other parts of the world, pneumatic tires or solid tires are mainly used. Solid tyres provide the most reliable grip when working on flat ground or road surfaces. Equipped with forklifts with pneumatic tires or large tires, the structure is more compact in the same bearing capacity and stability. Unfortunately, the driver's comfort is reduced.