The core metal is the load-bearing part of the Transmission Belt, which plays the role of power transmission and lateral support. It mainly uses ductile iron, cast iron forged steel or aluminum alloy and alloy steel sheet stamping forming combination, etc. Some tracks can use plastics. The design of the core metal should ensure its bending resistance, shear resistance, torsion resistance, wear resistance and lateral support capabilities, and no cracks and broken teeth will occur during the operation of the track. When the core metal is subjected to bending force, the maximum stress to maintain elastic deformation should not be less than 0.5 times the weight of the machine.
The strong layer is the traction element, which is the longitudinal tensile body of the Rubber Track, which bears the traction force and keeps the track pitch stable. The materials used in the strength layer are mainly galvanized steel wire, stainless steel wire, glass fiber, aramid or other high-strength and low-elongation synthetic fibers. The design of the tension layer should ensure the tensile strength of the track and keep the pitch stable.
The calculation of material strength should consider the effects of overload, mechanical damage and chemical corrosion. The designed longitudinal tension of the rubber track should be more than 5 times the weight of the machine. The design of the strength layer also needs to consider the reasonable combination of different materials, while ensuring the stability of the tensile strength and pitch, it improves the longitudinal flexibility and durability of the crawler and reduces the quality of the product. In addition, the reinforcing layer skeleton material needs to have good adhesion to rubber.
The buffer layer bears the strong vibration and impact of the belt body, and withstands the deformation caused by the radial, lateral and tangential forces in the Track running, protects the strong layer from damage by external forces, and prevents the strong layer from friction with the core metal. The materials used in the buffer layer mainly include nylon cord and nylon canvas. The selection and arrangement of the buffer layer should ensure that it can strengthen and protect the strong layer, and it should also have the ability to absorb impact and resist damage to the belt by external forces such as puncture and cutting.
The rubber parts of the rubber track include pattern side rubber, bottom rubber, cord, cloth layer rubber, tooth rubber and wheel side rubber. Rubber parts provide walking ability and overall cushioning, shock absorption and noise reduction functions for the crawler. The main material is usually NR/SBR, NR/SBR/BR and NR/BR combined with rubber or polyurethane elastomer.