弹性键联接在传递扭矩时可减小动载荷和振动。它是由轴3、套在轴上并具有间隙的零件如齿轮1和键2组成。轴上直角键槽的深度较键的直径大些。用垫圈4固定零件,防止轴向移动。联接时,把两端反向弯转的键杆装入槽内,并将其一端插入轴的径向孔,另一端装入制在零件上的端面槽中。当轴转动时,键以其弯端挤压零件,使零件转动。此时,键在所加载荷的作用下产生弹性弯曲和扭转,以保证轴与零件间的载荷传递具有弹性,从而降低动载荷并减小振动。键的变形,引起其一弯端转动α角而轴上键槽 Flexible keyed coupling reduces dynamic loads and vibrations while transmitting torque. It is composed of the shaft 3, the set of parts with a gap on the shaft, such as the gear 1 and the key 2. The depth of the right-angle keyway on the shaft is larger than the diameter of the key. Use washers 4 to secure the part against axial movement. When connecting, the key rod with opposite ends turned into the groove, and insert one end into the radial hole of the shaft, and the other end into the end face groove formed on the part. When the shaft rotates, the key presses the part with its bent end, turning the part. At this moment, the key flexes and twists under the applied load to ensure the transmission of the load between the shaft and the part is flexible, so as to reduce the dynamic load and reduce the vibration. The deformation of the key, causing it to turn a corner angle α and the shaft keyway