1, low grounding ratio, protecting soil.
Avoid dragging on the dry land to form the plough bottom, so as to preserve moisture and prevent drought; Prevent the paddy field from destroying the hard bottom layer and ensure the normal cultivation of the paddy field; The specific pressure of wheel tractor is three times that of crawler tractor. The experiment shows that the emergence rate of cultivated land is only 30%-40% after wheel drag compaction, but it can still reach 80%-90% after crawler drag compaction. Tug of war in paddy field affects transplanting and harvesting, and even leads to the deepening of mud feet, which makes it impossible to cultivate.
2. Large traction, obvious advantages in deep turning and load-bearing operation.
The traction of a tractor with the same weight is 1.4- 1.8 times that of a wheeled tractor. In terms of traction efficiency, the maximum traction efficiency of wheeled tractors is 55-65%, and that of crawler tractors can reach 70-80%. That is to say, tractors with the same horsepower lose 15% more effective power than wheeled tractors.
3. Excellent passability and climbing ability
Crawler tractor has good slope stability against overturning and sliding due to its low center of gravity and large adhesion coefficient, and also has the characteristics of small turning radius, strong maneuverability and strong cross-country climbing ability. They have better adaptability to farmland and terraces in mountainous and hilly areas than wheeled tractors, especially after being equipped with rubber tracks, and belong to all-terrain working machinery.
Its biggest disadvantage is its slow driving speed, which is very inconvenient during the transition. All-steel crawler will also seriously damage the road surface, and some areas restrict crawler tractors from going on the road.
Extended data:
Track classification:
According to the structural types, tank tracks can be divided into metal pin hinge type and metal rubber hinge type. Among them, metal rubber hinges can be divided into single pin type and double pin type.
Metal pin track has simple structure, direct dry friction between pin and pin hole, fast wear and short service life. In tank maintenance, it is often found that the track pin is ground into a "sugar gourd" shape. Track pin is also one of the wearing parts.
Metal-rubber articulated crawler is characterized in that a plurality of rubber collars are vulcanized on the metal pins, and the rubber collars are press-fitted in the pin holes of the crawler plate. There is no direct friction between the crawler pin and the pin holes of the crawler plate, and only the rubber collars are elastically twisted when twisted, which has low noise, long service life, more complicated structure and higher cost. Double-pin metal rubber crawler adopts end connectors to connect the two pins of two crawler plates, which is in good stress condition and convenient to disassemble, but its structure is complex, and it is the mainstream crawler form on the main battle tank.