Mining Cart is a very difficult task. With the continuous development of technology, various equipment in the mine is becoming more and more complete.
Fixed Mining Cart is a special vehicle for mine transportation. It has a simple structure and compact dimensions. The car box and the frame are fixedly connected. The dump cart must be flipped and unloaded. Its basic composition is a box, a frame, a bumper, a coupling and a walking mechanism. The frame is a metal structure that can withstand traction, braking force, collision forces between mine cars and rail impact buffers. The shock absorbers are installed at both ends of the frame to reduce the impact between the two vehicles. The coupler is a component that connects the locomotive and the mine car. The bolt chain and the slewing chain are commonly used. The large-scale mine car uses an automatic coupler with a buffer function. The running mechanism is two wheel pairs consisting of 4 wheels and 2 axles. When the total amount of minecarts and materials exceeds 20 tons, the number of wheel pairs should generally be increased. For mining carts with more than two wheel pairs, in order to facilitate the turning of the two wheel pairs into a cart with a turntable through a curve, this cart is called a bogie.
The stationary mine car is unloaded by special unloading equipment. It is composed of carriage, frame, wheel pair, buffer and connector. The currently used volume is 1.1 ~ 3.3m. The carriage is fixedly connected to the frame. The carriage is a box that bears the cargo and is welded from low-carbon steel plates. The frame is the basic component of the mine car. It consists of two longitudinal beams and a cross beam that can withstand traction. Shock absorbers are installed at both ends of the frame to relieve the impact between the two minecarts. The buffer is divided into a rigid buffer and a spring buffer. The rigid bumper has a simple structure, but the buffering effect is not good, and it is easy to damage the frame and shorten the life of the mine car. It is only suitable for small mine cars; the spring bumper can only buffer the impact impact, not the traction impact. Single or double lever spring buffers can cushion both impact and traction shocks. The connector that connects the mine cart into a car group and transmits traction should have sufficient reliability and simple operation to ensure the safety of the minecart formation and disassembly. After the mining carts are connected, there must be free movement in the vertical and horizontal directions, so that the mining carts can run freely on the curved roads with small curvature radius and in the inclined roadways with inconsistent slopes. Connectors are divided into ordinary type and automatic type according to their mode of action; they are divided into rotatable and non-rotatable according to the structure. The common type non-rotating connector has single-loop chain and triple-loop chain, which is suitable for the connection of dump trucks and fixed-box minecarts. The swivel connector has a universal chain, which is used when the fixed-car box type minecart is unloaded in the round dumper without removing the hook. The above-mentioned various ordinary connectors need to use a latch to connect the minecart. The automatic connector is also divided into two kinds of swivel and non-swivel. It is easy to use and safe to operate, but the structure is complex and it is only used for large mine car connection. The wheel set consists of an axle and two wheels. The wheel axle uses rolling bearings, the wheels are made of cast steel, and the wheel tread has a truncated cone shape to ensure that the mine cart runs along the center of the track.
