Flapping device for drum screen

The utility model provides a flapping device for a drum screen, and relates to the field of drum screens, the flapping device comprises a drum screen body and a support, the drum screen body comprises a plurality of screening rods, the support is connected with a flapping rod through a torsion spring, the side wall of the flapping rod is contacted with the screening rods, and when the flapping rod is contacted with the screening rods, the flapping rod is connected with the screening rods. And the torsion spring deforms. The beating rods can beat the screening rods through rebounding force generated after deformation of the torsion springs, materials are vibrated off from the drum screen through vibration generated during beating, the whole process is high in automation degree, electric driving is not needed, energy is saved, the environment is protected, and the screening efficiency is improved. 本实用新型提供滚筒筛用拍打装置，涉及滚筒筛领域，包括滚筒筛本体和支架，所述滚筒筛本体包括若干个筛分杆，所述支架通过扭转弹簧连接有拍击杆，所述拍击杆的侧壁与筛分杆接触，且设置为拍击杆与筛分杆接触时，所述扭转弹簧发生形变。通过扭转弹簧