With the rapid development of China’s machinery industry, the high automation and the safety issues of the machinery equipment are gradually being valued by more and more people. In the machinery industry, the overload of the mechanical transmission will cause a lot of serious consequences. The overload may lead to the bending deformation of the mechanical parts, partial fracture and struck of the transmission. It may even lead to the damage of the machine and personal injury and . As a result, we should attach great importance to the safety of mechanical transmission of the cone crusher.
Currently, the domestic cone crusher is widely used in construction, mining and refractories industry. Since the hardness and nature of the materials to be crushed is different, the volatility of the workload is large in the working process of the cone crusher. The overload is inevitable. This requires that the crusher equipment itself should have the instantaneous safety overload protection device for the safe and stable operation function of the crusher. In this way, the production can be ensured and the failure rate of the device can be reduced.
The service environment of the cone crusher is harsh. Therefore, most of the cone crushers are equipped with the overload protection measures. There are the following protection methods.
The first is the tape round of friction drive overload protection. The overload protection is achieved by the friction of the contact area of two components between the main motor and the main drive shaft. When the friction reaches the limit value (critical value) but it still can not overcome the material load, the slip phenomenon will occurs on the contact surfaces. In this way, the power transmission between the main motor and main drive shaft can be cut off in order to achieve the overload protection of the cone crusher.
The second is the shear pin safety coupling mechanical couplings overload protection. The main motor and the main drive shaft are directly connected by a shear pin coupling. When the transmitted torque exceeds the limit, the shear pin is cut in order to interrupt the torque transmission to protect the main motor and the main drive shaft to achieve overload protection.
The reliability of the above traditional mechanical overload protection methods is poor. Therefore, we should use the mechanical overload protection device structure and working principle of the cone crusher. The mechanical overload protection device of the cone crusher is composed of security arm, the safety brake shoe, leaf spring, leaf spring clip, locking bolt, and spring loaded bolt. The mechanical overload protection has the advantages of simple structure, easy manufacture. It can adjust the capacity of the mechanical protection of the device. In addition, it has reliable overload protection role.