High manganese steel plate in the process of production, long-term use of jaw broken broken plate has some matters needing attention, direct action, the crushing plate and material crushing force is very big, especially when broken larger material hardness, lead to install bolts crushing plate vibration, loose nut, crushing plate wear and great noise, serious when broken plate fall off or broken equipment downtime, affect the normal production. In this case, just tightening the bolts and nuts before starting the machine cannot completely solve the problem. It is necessary to analyze the specific problems according to the actual situation on the site and try to take practical methods to solve the problem. For example, the spring anti-loosening vibration damping device can be used to solve the loosening of the broken plate in the work, so as to prolong the service life of the broken plate and improve the work efficiency. Particular way is to use spring to make bolt looseness and self-tightening device, the device by the inner spring gland, spring, spring, wear the device tighten nut on the bolt, because the spring is nut after pressure to a certain extent, have strong vibration effect, produced by the large crushing force of bolts loose power by spring tension, automatically compensate for bolt not loose, Thus prolong the service life of the broken plate and improve the production efficiency. In short, in the process of use can be based on the specific situation to solve specific problems, prevent the broken plate loosening, wear and tear, broken and other conditions, so as to extend the service life of the broken plate, reduce costs, improve work efficiency.