The causes of the shortcomings of the gear reducer coupling mainly include the following two aspects: lack of oil or lack of oil in the coupling of the lifting accessories. Or improper use of grease will result in calcification of the grease, resulting in the inability to lubricate between the tooth surfaces, or the lack of lubrication will cause severe tooth surface wear. Treatment method: only need to replace the new grease, inject qualified grease oil on schedule to avoid oil leakage, and the oil quantity can be avoided.

The levelness and coaxiality of the two shafts are too large, which surpasses the planning of the coupling and can compensate, so that the meshing of the shaft teeth and the internal teeth is not accurate, and the component parts are in contact, and additional torque appears. And this additional moment can be decomposed into axial force. Acting on the inner gear ring, the magnitude of this force depends on the size of the fault, and is proportional to the fault. The greater the fault, the greater the force, which causes the axial displacement of the inner ring gear of the lifting accessory coupling.

Assuming that the displacement is too large, it will be uncontrollable. The gear reducer will cause severe gear wear and even broken teeth. The front and back teeth cannot mesh, and the gear reducer will not be able to drive. Treatment method: It is difficult to deal with this shortcoming, and it needs to stop production. That is, realignment, or realignment of the gear reducer side, or realignment of the reel side. Firstly, find out the part with large offset error, so first measure the offset of the coupling to that side, that is, measure the level and coaxiality of the main shaft and the level and coaxiality of the reducer main shaft.

The shortcomings can be eliminated by copying and aligning according to the quality standards from the beginning. For example, the author has found such shortcomings on site. The hoist is a JK-2.5/11.5 single-rope entangled hoist. At that time, the concentricity of the coupling was measured to be 2n, and the gear reducer side was low, resulting in lifting The accessory coupling cannot be operated, and the axial displacement of the inner gear ring exceeds the tooth width. After surveying and mapping, the reducer should be calibrated according to the quality standard from the beginning. After adjustment, the operation is normal and the shortcomings are eliminated.