Small loaders model
The small loaders starts from the function analysis of the execution system of the large forklift machine, and innovatively designs the forklift machine. The agricultural tractor is designed as a practical small forklift. There are 06, 08, 10, 12, 15, 18 20. Different models meet the needs of small and medium-sized construction enterprises.
The use of small forklifts
The forklift is a kind of earth and stone construction machinery widely used in highway, railway, construction, hydro power, port, mine and other construction projects. Minor shovel excavation for ore, hard soil, etc. It can also carry out bulldozing, lifting and loading and unloading of other materials such as wood by changing different auxiliary working devices. In roads, especially in high-grade highway construction, small forklifts are used for filling and excavating roadbed engineering, aggregate and loading of asphalt mixture and cement concrete yard. In addition, it can also carry out operations such as pushing soil, leveling the ground and pulling other machinery. Because the forklift has the advantages of fast operation speed, high efficiency, good maneuverability, and easy operation, it has become one of the main types of earthwork construction in engineering construction.
Which are small forklifts
Commonly used forklifts are classified according to the engine model, transmission form, walking system structure, and shovel unloading method. 1. Engine model:
① Models less than 22 are miniature forklifts.
②Models between 24 and 28 are small forklifts
③ Models 2105-485 are medium-sized forklifts
④Models larger than 4100 are high-end forklifts
2. Transmission form:
①Hydraulic-mechanical transmission, small shock and vibration, long service life of transmission parts, convenient operation, automatic adjustment between vehicle speed and external load, generally used in medium and large loaders;
②Hydraulic transmission: stepless speed regulation and convenient operation, but poor startability, generally only used on small loaders;
③ Electric drive: stepless speed regulation, reliable work, simple maintenance, high cost, generally used on large loaders. 3. Walking structure:
①Tire type: light weight, fast speed, flexible maneuverability, high efficiency, not easy to damage the road surface, large ground pressure, poor passability, but it is widely used;
②Crawler type: small grounding specific pressure, good passability, low center of gravity, good stability, strong adhesion, large traction, larger than cutting force, low speed, relatively poor flexibility, high cost, easy to damage the road surface when walking.
4. Loading and unloading method:
Front unloading type: simple structure, reliable operation, good vision, suitable for various work sites, and widely used;
5. Drive mode:
The small is generally rear-wheel drive, the medium is four-wheel drive, and the high-end is hydraulic.
The main components include engine, torque converter, gearbox, front and rear drive axles, and frame site.
1. Engine
2. There are two pumps on the torque converter of the small forklift. The working pump (supplying lifting and dumping bucket pressure oil) is also called the traveling pump (supplying torque converter and transmission pressure oil). Some models also have steering pumps. Equipped with pilot pump (supply control valve pilot pressure oil)
3. Working hydraulic oil circuit, hydraulic oil tank, working pump, multi-way valve, lift cylinder and dump cylinder.
4. Traveling oil circuit: gearbox oil sump oil, traveling pump, all the way into the torque converter and one into the gear valve
Transmission clutch.
5. Drive: drive shaft, main differential, wheel reducer.
6. Steering oil circuit: fuel tank, steering pump, steady flow valve (or priority valve) steering gear, steering oil.
7. There are two types of gearboxes: integrated (planetary type) and split (fixed shaft type).