Jaw crusher is an indispensable rough crushing equipment in mine crushing production line, and is usually used for primary crushing of materials. It has the characteristics of large crushing ratio, uniform crushing granularity, simple structure, reliable work, easy maintenance, and economic operation costs. It is widely used in metallurgical, mining, chemical, cement, construction, refractory and ceramic industries to crush and finely crush various medium-hard ores and rocks. However, even the * equipment will inevitably have certain failures during long-term use, such as cracking of the jaw crusher frame. The following is the reason for the cracking of the jaw crusher frame summarized by Jiaozuo Zhongxin Heavy Industry. Causes of jaw crusher frame cracking:
    1. The quality problem of the equipment itself caused by the casting technology or welding failure of the jaw crusher in production.
    2. The materials of the brackets and brackets are unqualified and cannot withstand huge impact forces. When they are impacted, they cannot play the role of cushioning and self-protection, but the frame is damaged or broken.
    3. The fixed jaw plate is not firm enough during installation, and it will loosen in the vibration generated by the jaw crusher for a long time, which will hit the tooth plate of the front wall of the frame and cause damage to the frame.
    4. The basic rigidity of the foot of the equipment host is not fixed, which causes the frame to jump.
    5. The bolts of the rack bearings were not tightened during installation, and they became loose.
    6. The tooth profile is not repaired in time.
    7. The eccentric shaft and pin are damaged or the expansion sleeve is loose, which causes the weight of the flywheel wheel to be misaligned.