The end cover is connected with the rotor and frame structure parts. On the one hand, it plays a protective role in the motor, on the other hand, the relative position of the stator and rotor is guaranteed by the rolling bearings installed in the end.

The end cover is a connecting piece between the motor stator and the rotor. It is mainly the surface: fit with the stand stop mouth and face, and a rotating shaft and bearing with the shaft hole, a bearing chamber in the holes and the end surface. The technical requirements for end cap processing are as follows:

1 to ensure that the end cap bearing room size accuracy, finish and cylinder. Too tight will make the bearings overheating, oversize geometric tolerance will make the inner and outer rings of bearing uneven force.

2 end cover with the size of the end of the size of the accuracy and cylinder to meet the requirements, otherwise it will cause the installation difficulties.

3 end cap end and bearing room of the coaxial degree and the end of the axis line of the beat should meet the requirements of the drawings. Otherwise it will affect the uniformity of air gap is not high.

4 end cap end face to bearing chamber depth to meet the requirements, otherwise it will lead to the death of the bearing card.