CN211930391U

CN211930391U - Compact permanent magnet motor

Info

Publication number: CN211930391U
Application number: CN202020736128.5U
Authority: CN
Inventors: 谢文超
Original assignee: Hunan Tianan Door Industry Technology Co ltd
Current assignee: Hunan Tianan Door Industry Technology Co ltd
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2020-11-13
Anticipated expiration: 2030-05-08

Abstract

The utility model discloses a compact permanent-magnet machine, including the stator support, fix the stator that has the winding on the stator support, fix the end cover that covers the stator on the stator support, rotationally fix pivot on stator support and end cover, fix the external rotor subassembly that just is located between stator and the end cover in the pivot through the bearing, all be equipped with the bearing room of installation bearing on end cover and the stator support, the bearing room on the end cover is established in the position that does not surpass the end cover inner wall. The utility model discloses with the position of bearing room on the end cover by interior axial displacement outward, the radial force that makes the bearing simultaneously all is born by the wall of end cover, the strengthening rib of cancellation bearing excircle has shortened the axial dimension of bearing room in the end cover and the axial dimension between end cover and the external rotor group, has not only shortened the axial installation length of motor, has still simplified the structure of end cover, has solved current motor axial dimension and bulky problem. Can meet the application requirements of occasions with compact structure and small installation size.

Description

Compact permanent magnet motor

Technical Field

The utility model belongs to permanent-magnet machine, concretely relates to compact permanent-magnet machine.

Background

The motor is divided into an inner rotor motor and an outer rotor motor according to the structural form of the rotor, along with the development trend of miniaturization and structure compactness of a driving motor, the requirements of the outer rotor motor applied to the fields of electric fans, small wind driven generators and automatic doors are higher and higher, and the structural form of the outer rotor motor with compact structure and small volume is required on the premise that large torque is required to be output and is not changed. From the design point of the existing motor, the influence on the volume of the motor is mainly the outer diameter of a stator core in the radial direction, and the influence is large in the aspects of the length of the stator core, the end part of a winding, the thickness of an outer rotor core and the position of a bearing chamber in the axial direction, once the electromagnetic design parameters and the geometric dimension of effective materials of the motor are determined, the length of the stator core, the height of the end part of the winding and the dimension of an outer rotor assembly are also determined, and the axial length only changes the gap between the outer rotor assembly and the excircle of the bearing chamber, but as can be known from the existing motor structure, as shown in fig. 1, the axial position of a bearing 5 for installing a rotating shaft 8 is arranged in the bearing chamber 6 of an end cover 2, and meanwhile, a plurality of reinforcing ribs 9 are required to be added outside the bearing chamber 6 to bear the radial force when the bearing 5 operates under load, and in order to ensure that the, the axial size of the bearing chamber 6 in the end cover 2 is large, so that the axial length of the whole motor is long, the motor is large in size, and the motor cannot be applied to occasions with compact structure and small installation size, such as the application in the field of automatic door driving motors. Therefore, it is necessary to design a low-speed high-torque compact permanent magnet motor to solve the above problems from the axial position where the bearings are placed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at prior art's defect, provide a compact permanent-magnet machine that axial dimension is little.

Realize the utility model discloses the technical scheme that the purpose was adopted as follows:

the utility model provides a compact permanent-magnet machine, including the stator support, fix the stator that has the winding on the stator support, fix the end cover that covers the stator on the stator support, rotationally fix pivot on stator support and end cover, fix the external rotor subassembly that just is located between stator and the end cover in the pivot through the bearing, all be equipped with the bearing room of installation bearing on end cover and the stator support, the bearing room on the end cover is established in the position that does not surpass end cover inner wall.

The bearing chamber on the end cover protrudes out of the outer wall of the end cover, and when the rotating shaft is connected with the transmission coupler, the end part of the transmission coupler is designed into a groove to contain the protruding part of the bearing chamber on the outer wall of the end cover.

Advantageous effects

The utility model discloses with the position of bearing room on the end cover by interior axial displacement outward, the radial force that makes the bearing simultaneously all is born by the wall of end cover, the strengthening rib of cancellation bearing excircle has shortened the axial dimension of bearing room in the end cover and the axial dimension between end cover and the external rotor group, has not only shortened the axial installation length of motor, has still simplified the structure of end cover, has solved current motor axial dimension and bulky problem. Can meet the application requirements of occasions with compact structure and small installation size.

The technical scheme of the utility model is further explained in the following with the attached drawings.

Drawings

Fig. 1 is a schematic structural view of a conventional motor.

Fig. 2 is a schematic structural diagram of the present invention.

In the figure: 1. stator support, 2, end cover, 3, stator, 4, external rotor subassembly, 401, rotor body, 402, permanent magnet, 5, bearing, 6, bearing chamber, 7, transmission coupling, 701, recess, 8, pivot, 9, strengthening rib, L, clearance.

Detailed Description

Referring to fig. 2, the compact permanent magnet motor provided by the present invention includes a stator support 1, a stator 3 fixed on the stator support 1 and having a winding, an end cover 2 fixed on the stator support 1 and covering the stator 3, a rotating shaft 8 rotatably fixed on the stator support 1 and the end cover 2 through a bearing 5, and an outer rotor assembly 4 fixed on the rotating shaft 8 and located between the stator 3 and the end cover 2, wherein the outer rotor assembly 4 includes a rotor body 401 and permanent magnets 402 arranged on the circumference of the rotor body 401 according to N, S poles; the end cover 2 and the stator support 1 are both provided with bearing chambers 6 for mounting the bearing 5, the bearing chambers 6 on the end cover 2 are arranged at positions which do not exceed the inner wall of the end cover 2, and after the bearing 5 is mounted in the bearing chambers 6, the radial force of the bearing chambers in load operation can be borne by the wall of the end cover 2, so that the reinforcing ribs on the excircle of the bearing chamber 6 in the existing motor can be eliminated, and the axial dimension of the bearing chambers 6 in the end cover and the axial dimension between the end cover 2 and the outer rotor group 4 are shortened. In order to ensure that the outer rotor assembly 4 and the end cover 2 do not rub against each other, only a small gap L2 needs to be left between them.

The utility model discloses during the use, because bearing chamber 6 on the end cover 2 does not go out end cover 2's inner wall, this kind of condition of the outer wall of bearing chamber 6 protrusion end cover 1 on the end cover 2 can appear certainly, when pivot 8 and transmission coupler 7 are connected like parts such as shaft coupling, belt pulley, this only need design into recess 701 to the tip of transmission coupler 7, contain including with the bearing chamber 6 bulge on the 1 outer wall of end cover can, can shorten the axial installation length of motor.

Claims

1. A compact permanent magnet motor comprises a stator support, a stator with windings, an end cover, a rotating shaft and an outer rotor assembly, wherein the stator is fixed on the stator support, the end cover covers the stator, the rotating shaft is rotatably fixed on the stator support and the end cover through bearings, the outer rotor assembly is fixed on the rotating shaft and positioned between the stator and the end cover, bearing chambers for mounting the bearings are arranged on the end cover and the stator support, and the compact permanent magnet motor is characterized in that the bearing chambers on the end cover are arranged at positions which do not exceed the inner wall of the end cover.

2. The compact permanent magnet machine of claim 1, wherein the bearing chamber of the end cap protrudes from the outer wall of the end cap, and when the shaft is coupled to the drive coupling, the end of the drive coupling is configured as a groove to contain the protruding portion of the bearing chamber of the outer wall of the end cap.