CN218514187U

CN218514187U - Brushless coreless motor structure

Info

Publication number: CN218514187U
Application number: CN202222866593.2U
Authority: CN
Inventors: 张烽; 林初夏; 杨超
Original assignee: Mingzhi Electrical Appliances Taicang Co ltd
Current assignee: Mingzhi Electrical Appliances Taicang Co ltd
Priority date: 2022-10-30
Filing date: 2022-10-30
Publication date: 2023-02-21
Anticipated expiration: 2032-10-30

Abstract

The utility model relates to a brushless coreless motor structure, including casing, stator core, winding displacement, pretension spring, rear end cap, bearing and rotor, in the stator core assembly casing, bearing, rotor and pretension spring pack into in the casing, the rear end cap is connected with the casing, winding and winding displacement welding back pack into the stator core inboard. Compared with the prior art, the utility model has the advantages of reduced motor material cost, improved motor torque performance, improved production efficiency.

Description

Brushless coreless motor structure

Technical Field

The utility model relates to a motor structure especially relates to a brushless coreless motor structure.

Background

Brushless coreless motors are widely used in a variety of industrial, medical, aerospace, and life scenarios. Under the design requirements of miniaturization and large torquemoment, the design of the structure of the motor has great challenge. Under the limited space, the structure of the motor is reasonably arranged, and the aim of structural design is to reserve enough space for the magnetic steel and the iron core of the motor. The brushless coreless motor has small size and certain difficulty in assembly, and particularly the brushless coreless motor with the outer diameter of less than 10 mm.

Through retrieval, chinese patent publication No. CN 214591027U introduces a structural layout manner of a coreless motor in detail, including a rotor, an iron core, a winding, a circuit board, a holder, a case, a back cover, a bearing, etc., the overall layout is relatively compact, but the number of parts is still large, and in the motor assembly manner, after the fixing of the winding and the iron core is completed, the fixing of the circuit board and the winding needs to be operated inside the case, so the assembly difficulty is increased due to the small space.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is to provide a brushless coreless motor structure which reduces the material cost of the motor, improves the torque performance of the motor and improves the production efficiency in order to overcome the defects existing in the prior art.

The purpose of the utility model can be realized through the following technical scheme:

according to the utility model discloses an aspect provides a brushless coreless motor structure, including casing, stator core, winding displacement, pretension spring, rear end cap, bearing and rotor, in the stator core assembly casing, bearing, rotor and pretension spring pack into in the casing, the rear end cap is connected with the casing, it is inboard to pack into the stator core after winding and winding displacement welding.

As a preferable technical scheme, the winding and the flat cable are subjected to insulation coating in a gluing mode after being welded.

As a preferred technical scheme, the winding and the flat cable are subjected to insulation coating in a sleeving and wrapping heat-shrinkable sleeve mode after being welded.

As a preferable technical scheme, the rear end cover is provided with a mounting hole for inserting the winding and the flat cable after welding.

Preferably, the mounting hole is in the shape of a circular arc.

Preferably, the pre-tightening spring is positioned on the rotor inside the bearing.

Compared with the prior art, the utility model has the advantages of it is following:

1) In assembly, the winding and the wiring board are not required to be welded inside the shell, the winding and the wiring are welded outside, the operation in a larger space is realized, the detection of cold joint after welding is convenient, and the production efficiency is improved;

2) In the moment performance, the space reserved for electromagnetic design by the motor is increased after the wiring board and the retainer are not arranged, and the moment performance of the motor can have certain space for improvement;

3) In cost, the utility model discloses reduce two materials of wiring board and holder, the motor material cost of reduction

Drawings

Fig. 1 is a schematic view of the appearance structure of the present invention;

FIG. 2 is a schematic sectional view of the present invention;

fig. 3 is a schematic diagram of the winding of the present invention before wiring;

fig. 4 is a schematic diagram of the winding and the flat cable after welding.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, a brushless coreless motor structure includes a housing 1, a stator core 2, a winding 3, a flat cable 4, a pre-tightening spring 5, a rear end cap 6, a bearing 7 and a rotor 8, wherein the stator core 2 is assembled in the housing 1, the bearing 7, the rotor 8 and the pre-tightening spring 5 are installed in the housing 1, the rear end cap 6 is connected with the housing 1, and the winding 3 and the flat cable 4 are welded and then installed inside the stator core 2; the utility model has the advantages that the winding and the wiring board are not needed to be welded in the shell, the winding and the wiring are welded outside, the operation in a larger space is realized, the false welding is conveniently checked after the welding, and the production efficiency is improved; meanwhile, in the moment performance, the space of the electromagnetic design is increased for the motor without the wiring board and the retainer, and the moment performance of the motor can have a certain space for improvement.

Fig. 3 is a schematic diagram of the winding before wiring, and the taps need to be arranged at corresponding positions. Fig. 4 is a schematic diagram of the welded windings and cables. The insulation and voltage-resistance scheme after welding comprises the schemes of gluing, sheathing a heat shrink sleeve and the like, namely one implementation mode is as follows: the winding 3 and the flat cable 4 are welded and then are subjected to insulation coating in a gluing mode; the other implementation mode is as follows: and after welding, the winding 3 and the flat cable 4 are insulated and coated in a sleeving and coating heat-shrinkable sleeve mode.

The rear end cover 6 is provided with a mounting hole 61 for inserting the winding 3 and the flat cable 4 after welding, the mounting hole 61 is in the shape of an arc, and the arc-shaped mounting hole is arranged, so that the welded assembly can be inserted conveniently, and the mounting convenience is further improved.

The pre-tightening spring 5 is positioned on the rotor 8 on the inner side of the bearing 7, and the anti-seismic performance of the motor is further improved by arranging the pre-tightening spring 5.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a brushless coreless motor structure, includes casing (1), stator core (2), winding (3), winding displacement (4), pretension spring (5), rear end cap (6), bearing (7) and rotor (8), in stator core (2) assembly casing (1), in bearing (7), rotor (8) and pretension spring (5) pack into casing (1), rear end cap (6) are connected with casing (1), its characterized in that, stator core (2) inboard is packed into to winding (3) and winding displacement (4) welding back.

2. A brushless coreless motor structure as claimed in claim 1, wherein the windings (3) and the bus wires (4) are insulated by gluing after welding.

3. The brushless coreless motor structure of claim 1, wherein the windings (3) and the flat cables (4) are insulated and coated by sleeving a heat-shrinkable sleeve after being welded.

4. A brushless coreless motor structure as claimed in claim 1, wherein the rear end cap (6) is provided with mounting holes (61) for insertion of the windings (3) and the bus bars (4) after welding.

5. A brushless coreless motor structure as claimed in claim 4, wherein the mounting hole (61) is circular arc shaped.

6. A brushless coreless motor structure as claimed in claim 1, wherein the pre-tensioned spring (5) is located on the rotor (8) inside the bearing (7).