CN204118921U - A kind of outer rotor motor - Google Patents

Abstract

The utility model relates to an external rotor motor, which includes a casing, a stator, a rotor core, a shaft, an end cover, and a flange. There is a rotor core inside the casing, a stator is inside the rotor core, and the shaft is in the stator. The end cover is connected with the casing, and there is a flange on the outside of the end cover. It is characterized in that: the inner end of the casing is provided with a bearing, one end of the shaft is on the bearing at the inner end of the casing, and the other end is on the bearing in the middle of the end cover. The end of the flange is provided with a stepped circular groove, the end of the flange is in contact with the end of the bearing on the end cover, and a sealing ring is provided between the stepped circular groove at the end of the flange and the end cover. The interference fit between the blue plate and the shaft is screwed into the fixed connection with a saddle screw. The utility model has reasonable design, simple structure, easy manufacture, low cost, reliable performance, good concentricity of stator and rotor, good sealing form, high protection level, and can realize axial and radial positioning of motor installation.

Description

An external rotor motor

technical field

The utility model relates to the technical field of motors, in particular to an outer rotor motor. the

Background technique

The external rotor motor has the advantages of high wind efficiency, compact structure, low temperature rise, and beautiful appearance. It has been widely used in refrigeration equipment such as condensers and dryers. the

The traditional external rotor motor adopts a simply supported installation structure, the shaft and the rotor are fixed, one end of the stator is connected to the fixed surface through a flange, and the shaft is connected to the stator through bearings at both ends. The rotor is in the shape of a "bowl", the shaft is thin and long, the rotor is fixed at one end, and the fan and the rotor fulcrum are stressed by a cantilever beam, which easily causes the stator and rotor to rub against each other. Due to structural limitations, the sealing form is a labyrinth non-contact seal, and the protection level does not meet the requirements of IP44. the

Contents of the invention

The purpose of this utility model is to solve the deficiencies of the above-mentioned technologies, and provide an outer rotor motor with simple structure, reasonable design, easy manufacture, low cost and good performance. the

The technical solution adopted by the utility model is: an external rotor motor, including a casing, a stator, a rotor core, a shaft, an end cover, and a flange, a rotor core inside the casing, and a stator inside the rotor core. , the shaft is in the stator, the end cover is connected with the casing, and there is a flange on the outside of the end cover. On the bearing in the middle of the cover, the end of the flange is provided with a stepped circular groove, and the end of the flange is in contact with the end of the bearing on the end cover. A sealing ring is provided, and the interference fit between the flange plate and the shaft is screwed into and fixedly connected with seam screws. the

The utility model is reasonable in design, simple in structure, easy to manufacture, low in cost and reliable in performance. The end of the disc is in contact with the end of the bearing on the end cover, and there is a sealing ring between the stepped circular groove at the end of the flange and the end cover, which is sealed by a labyrinth non-contact and contact skeleton oil seal. The grade is high, and the interference fit between the flange and the shaft is screwed into the fixed connection with a seam screw, which has sufficient strength. The seam screw can transmit torque and axially locate. the

Description of drawings

Fig. 1 is the structural representation of the utility model.

Markings in the figure: 1, sealing ring, 2, flange, 3, end cover, 4, stator, 5, rotor, 6, casing, 7, shaft, 8, bearing. the

Detailed ways

It can be seen from Figure 1 that an external rotor motor includes a casing 6, a stator 4, a rotor 5 iron core, a shaft 7, an end cover 3, and a flange 2. There is a rotor 5 iron core in the casing 6, and the rotor 5 iron core There is a stator 4 in the core, the shaft 7 is in the stator 4, the end cover 3 is connected with the casing 6, there is a flange 2 outside the end cover 3, a bearing 8 is arranged at the inner end of the casing 6, and one end of the shaft 7 is in the On the bearing 8 at the inner end of the casing, the other end is on the bearing in the middle of the end cover 3, the end of the flange 2 is provided with a stepped circular groove, and the end of the flange 2 is in contact with the end of the bearing on the end cover 3 , A sealing ring 1 is provided between the stepped annular groove at the end of the flange 2 and the end cover 3, and the interference fit between the flange 2 and the shaft 7 is screwed into and fixedly connected with a saddle screw. Since the two ends of the shaft are on the bearings, the rotor is evenly stressed between the two bearings, which can ensure the concentricity of the stator and the rotor and avoid friction between the stator and the rotor during operation. 3. It forms a labyrinth non-contact and contact sealing ring with a high protection level, which can reach IP55. The connection between the motor flange and the shaft adopts a fixed connection of interference fit and screwing in with seam screws. Due to the interference, the connection can be guaranteed With sufficient strength, the saddle screw can play the role of torque transmission and axial positioning. The utility model has the advantages of reasonable design, simple structure, reliable performance and high protection level, and is widely applicable to refrigeration equipment such as condensers and dryers. the

Claims (1)

1. an outer rotor motor, comprise casing, stator, rotor core, axle, end cap, ring flange, rotor core is had in casing, stator is had in rotor core, axle in the stator, end cap is connected with casing, ring flange is had outside end cap, it is characterized in that: casing the inner is provided with bearing, one end of axle is on the bearing of casing the inner, the other end is on the bearing in the middle of end cap, ring flange end is provided with stairstepping annular groove, ring flange end contacts with the bearing end on end cap, sealing ring is provided with between ring flange end stairstepping annular groove and end cap, ring flange is screwed into axle interference fit junction of the edges of two sheets of paper screw and is fixedly connected with.