As we know, the working condition of the jaw crusher is very serious. Its work load change frequently. The maximum working load is more than three times of the average working load. In this case, the jaw crusher can be used to load or add special materials (such as iron, etc.) through the overload. Therefore, the overload protection device is very necessary in the jaw crusher.

In the next section, we mainly introduce three kinds of commonly used methods: fixed screw, clamp and wedge.

SBM jaw crusher.jpg

Screw fixing

Screw fixation method is used to fix the striking rod by using a few screws. In a fixed method, the screw is stuck on the surface and is very easily damaged. In addition, once the screw is in a strong shear force, they may be part of the. This will cause serious accidents.

Clamp fixing

In a fixed way, the rod is inserted into the rotor through both sides of the slot and the blowing rod is compacted by pressing the pressure plate on both ends. However, if we use this fixed method, the rod can not be tightly compacted, especially in the work process, the rod will be very easy to loose.

In order to tighten the rod, we need to weld the crack and the template together. But the template is easy to wear, it is difficult to change.

Wedge fixing

In the wedge fixed method, we usually use the wedge to fix the blow on the rotor. Under the action of the centrifugal force, the fixed method can ensure the high speed rotation of the rotor. In addition, the rotor is tightened and fixed, reliable performance, convenient replacement. At present, the wedge fixed method is relatively good fixed blow it. Many manufacturers use this method to fix the blow rod in the impact crusher.

Of course, to extend the service life of the rod, manufacturers not only need to use the appropriate fixed method, but also the use of high-quality materials, so that the fight stick, and to maintain the structure of the optimization.

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