1) E-type simple jaw double bracket mechanism (so-called simple pendulum type) jaw crusher; 2) The jaw crusher with a single toggle mechanism (so-called compound pendulum) with complex oscillations. In recent years, hydraulic technology has been applied to crushing equipment, and a hydraulic jaw crusher has appeared. (a) - Jane Jaw Crusher; (b) - Complex Pendulum Crusher; (c) - Hydraulic Jaw Crusher The movement of the movable jaw is achieved by means of a connecting rod and a thrust plate mechanism. It is composed of a flywheel 7, an eccentric shaft 8, a connecting rod 9, a front thrust plate and a rear thrust plate 13. The flywheels are respectively installed at the two ends of the eccentric shaft, the eccentric shaft is supported in the main bearing of the side wall of the frame, the upper part of the connecting rod is mounted on the eccentric shaft, and the one ends of the front and rear thrust plates are respectively supported on the brackets on the lower sides of the connecting rod On the support 14, the other end of the front thrust plate is supported in the bracket support of the lower part of the movable jaw, and the other end of the rear thrust plate is supported on the bracket support of the rear wall of the frame. When the motor drives the eccentric shaft to rotate through the pulley, the link is made to move. The up and down movement of the connecting rod drives the thrust plate to move. As the motion of the thrust plate constantly changes the angle of inclination, the movable jaws reciprocate around the suspension axis, thereby breaking the ore. When the moving jaw moves forward, the horizontal pull rod balances the inertial force generated by the moving jaw and the thrust plate through the spring 10, so that the moving jaw and the thrust plate are tightly combined and are not separated. When the moving jaws retreat, the spring can assist. Because the jaw crusher works intermittently, that is, there is a working stroke and an idle stroke, the load of the motor is extremely uneven. In order to make the load uniform, it is necessary to store the energy of the idling stroke when the moving jaw moves backward (away from the fixed jaw) so that the energy is completely released during the working stroke (breaking of the ore). Using the principle of inertia, a flywheel can be installed at each end of the eccentric shaft to achieve this goal. In order to simplify the structure of the machine, one of the flywheels is usually used as a pulley for transmitting power. For a large jaw crusher driven by two electric motors, the two flywheels are all made into a pulley, that is, the pulley also acts as a flywheel. The eccentric shaft or the main shaft is an important part of the crusher. The suspension shaft of the simple jaw-type jaw crusher is also called the mandrel. The eccentric shaft is the main part that drives the connecting rod to move up and down. Because they are subjected to a large crushing force during operation, they are generally made of high-quality alloy steel. According to the state of resources in China, the eccentric shaft of the large jaw crusher is suitable for alloy steels such as manganese molybdenum vanadium , manganese molybdenum boron and chromium molybdenum. The small jaw crusher is made of 45 gauge steel. The eccentric shaft should be tempered or normalized to improve strength and wear resistance. The main shaft is generally made of 45 steel. The connecting rod is only available in the simple pendulum jaw crusher, which is composed of the connecting rod body and the connecting rod head. It is made of cast steel because it is subjected to tensile force during work. The connecting rod body has two kinds of whole and combined, the former is mostly used for medium and small jaw crushers, and the latter is mainly used for large jaw crushers. In order to reduce the inertia of the connecting rod, the stress is reduced to reduce the weight of the connecting rod body. Therefore, the medium and small jaw crushers generally adopt the "work" and "ten" cross-section structure, while the large jaw crusher adopts the box shape. Sectional form. For the hydraulic jaw crusher, the hydraulic fluid cylinder (piston) is also installed in the connecting rod body, which acts as an insurance when the machine is overloaded. The thrust plate, also known as the bracket, is both a part that transmits motion to the moving jawper and a safety device for the crusher. The thrust plate is subjected to pressure during work. It is generally cast in cast iron, or cast in two pieces, and then joined by rivets or bolts. Both ends of the thrust plate (elbows) wear most severely. In order to increase the wear resistance of the elbow, the elbow is sometimes manufactured separately from the thrust plate, and the elbow portion should be chilled, but it is preferable to change their structural form, such as rolling contact, to facilitate the formation of a lubricating film. Reduce wear and tear. Adjustment device It is an adjustment mechanism for the size of the discharge port of the crusher. With the wear of the broken tooth plate, the discharge port is gradually increased, and the particle size of the crusher is continuously thickened. 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Type and construction of jaw crusher
The jaw crusher appeared in 1858. Although it is an ancient crushing equipment, but because the structure is simple, reliable, easy to manufacture, easy maintenance, etc., it is still metallurgical mining, building materials, chemicals and rail other departments widely used. In metal mines, it is mostly used for coarse and medium crushing of hard or medium hard ores. E-type crushers are usually classified according to the movement characteristics of movable jaws (moving jaws). There are two main types of applications in the industry: