Construction Machinery: Single Bucket Excavator Classification
According to the different working devices, it is divided into four types: front shovel, back shovel, dragline and grab shovel. The bucket of the front shovel is hinged at the end of the stick and supported by the boom. The excavation movement is from bottom to top, and the trajectory of the tip of the bucket is often curved, which is suitable for excavating the soil above the stop surface. The bucket of the backhoe is also hinged to the stick. The excavation movement is usually from top to bottom, and the tooth track is circular, suitable for excavating the soil below the stop surface. The bucket of the shovel excavator moves along the lower edge of the boom. When the boom is placed in a fixed position, the trajectory of the tip of the bucket is straight, so that a straight excavation surface can be obtained, which is suitable for excavating slopes, side trenches or leveling the site. The bucket of the dragline excavator is in the shape of a dove, and the front edge of the bucket bottom is equipped with teeth. When working, the bucket is thrown outwards on the excavation surface, the bucket teeth are cut into the soil by the bucket, and then the dragging bucket is used to excavate the soil. After the digging is completed, the bucket is lifted by the lifting cable, and the turntable is turned to the unloading point. The bucket is flipped over to unload the soil. The soil below the stop surface can be excavated, and underwater excavation can be carried out. The excavation range is large, but the excavation accuracy is poor. The bucket of the shovel excavator is hinged by two or more shovel flaps. When the shovel flap is opened, when the shovel is thrown on the excavation surface, the edge of the flap is cut into the soil, and the shovel is grasped by a steel cable or a hydraulic cylinder, and the shovel is grasped. soil. Unload the soil by loosening the flap. Used for excavation in foundation pits or underwater, with deep excavation depth. It can also be used to load particulate materials. The small and medium-sized excavators commonly used in earthwork can be replaced by different working devices, and different buckets can be replaced. It can also be converted into cranes, pile drivers, earth-moving machines, etc., so it is called a general-purpose (multi-energy) excavator. Mining or mining excavators are generally only equipped with a working device for a single operation, so it is called a special excavator. According to the walking mode, it is divided into two types: crawler type and tire type. There are two kinds of mechanical transmission and hydraulic transmission according to the transmission mode. Hydraulic drive single bucket excavator uses an oil pump, hydraulic cylinder, hydraulic motor and other components to transmit power to the excavator. The pressure oil output by the oil pump respectively drives the hydraulic cylinder or the motor to work, so that the corresponding parts of the machine operate. Common is the backhoe (see color map). During the backhoeing operation, the boom is lowered. As a support, the bucket cylinder is placed below the stop surface by the arm cylinder or the bucket hydraulic cylinder, and the arc is moved to excavate and fill the soil, and then the starting arm is lifted. The motor turns to the unloading point and the bucket is turned over to unload the soil. The whole machine is driven by the left and right hydraulic motors, and the motor is reversed and can be moved in, out or turned. Tire walking is also driven by the engine through the gearbox, main drive shaft and differential, but the mechanism is complex. Small and medium-sized machines are mostly driven by a double pump, and a pump is separately added to drive the slewing mechanism to save power. The main technical parameters of hydraulic transmission excavators are bucket capacity, and the main parameters are machine weight or engine power. The excavator is compact in structure and light in weight, and often has a variety of workable devices to meet various operational needs. The operation is light and flexible, and the work is stable and reliable, so it has developed rapidly and has become a major variety of excavators. Towel Hanger,Wholesale Hanger,Houseware Hanger Shoe Rack,Shoe Cabinet Co., Ltd. , http://www.nsstoragebox.com