1 The axial movement of the main motor shaft is too large

　　The motor is supported by sliding bearings, the factory standard rotor axial movement is 5 of the motor's magnetic force, and the position of the magnetic force is not marked, and the allowable axial movement of the gear coupling is 5, which is precisely due to the rotor of the main motor. The axial movement is greater than the axial movement of the drum gear coupling, causing the rotor's axial movement to produce a large impact on the gear coupling during the start and stop of the main motor, causing gear damage .

　　2 Improper installation of the motor

　　Since the position of the magnetic force is not marked on the motor, the rotor position of the motor is not at the position of the magnetic force when the motor is statically installed, and the influence of the magnetic force of the motor is ignored during the installation process.When the motor rotates, due to the pulling effect of the gear coupling, the motor rotor cannot be positioned under the magnetic force. This intensifies the impact on the gear coupling and accelerates the damage of the gear shaft.

　　solution:

　　Improved structure and working principle of drum gear coupling

　　In view of the above situation, we have improved the structure of the half coupling. First, the half coupling 4 is processed into a finished product, and then the part is divided into two parts by a wire cutting machine along the shaft diameter. The main part is a half coupling. The attachment of the motor body is a locking block. The main body of the modified rear half of the coupling is far away from the motor end, and the inner hole is complete, which ensures the coaxiality requirement of the motor shaft. The motor shaft, the main body and the locking block are connected by hexagonal socket screws and spring washers. Together, since the locking block type half coupling is cut after processing the finished product, it will not affect the coaxiality requirements of the main body of the half coupling and the motor after assembly.With this structure, the original line-to-surface contact of the torque transmission part becomes the surface-to-surface contact, and the contact length increases along the axial direction, which in turn increases the contact area between the motor and the coupling, and can also transmit large torques. , The spring washer between the hexagon socket screw and the locking block has an anti-loosening effect, and the hexagon socket screw will not loosen when the coupling rotates at a high speed.