CN107134871B

CN107134871B - Insulating skeleton and PCB board assembly structure, motor and air conditioner

Info

Publication number: CN107134871B
Application number: CN201610110907.2A
Authority: CN
Inventors: 肖胜宇; 喻文斌; 刘丽刚
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2016-02-29
Filing date: 2016-02-29
Publication date: 2023-10-20
Anticipated expiration: 2036-02-29
Also published as: CN107134871A

Abstract

The invention discloses an assembly structure of an insulating framework and a PCB (printed circuit board), and relates to the technical field of motors. The assembly structure of the insulating framework and the PCB comprises a positioning structure arranged on the outer wall of the insulating framework and used for limiting the assembled PCB to move along the axial direction and the circumferential direction, and the assembly structure also comprises a threaded hole which is arranged at the position, opposite to the positioning structure, on the outer wall and used for fixedly connecting the insulating framework with the PCB. Meanwhile, discloses a motor and an air conditioner comprising the insulating framework and a PCB assembly structure. The invention can improve the assembly reliability and the assembly efficiency while ensuring the bonding strength of the insulating framework and the PCB, has good PCB fixing effect, is easy to disassemble, avoids the damage of the insulating framework and the PCB, and reduces the production cost; in addition, in the assembly process of the insulating framework and the PCB, the PCB is not stressed, so that the problem of damage to the PCB is avoided.

Description

Insulating skeleton and PCB board assembly structure, motor and air conditioner

Technical Field

The invention relates to the technical field of motors, in particular to an assembly structure of an insulating framework and a PCB in a motor, the motor with the assembly structure of the insulating framework and the PCB and an air conditioner with the motor.

Background

The insulated motor mainly comprises a stator and a rotor, and the motor stator is generally insulated by an insulating framework. The insulating framework is an injection molding piece which is arranged at the end part of the motor stator and has a wire passing structure design. The installation mode of the existing DC brushless motor insulation framework and the PCB board is mainly divided into the following two modes:

1. the PCB and the insulating framework are assembled together by adopting 8 positioning columns in a dispensing mode, the assembly mode is simple, the time required by drying solid glue is considered, the requirement of the insulating framework and the PCB in the axial force direction is ensured by adopting the dispensing mode, the bonding strength of the insulating framework and the PCB is poor, and the installation reliability is poor; in addition, the assembly in the dispensing mode also has the condition of difficult repair, such as difficult detachment of the PCB, and easy occurrence of insulation framework damage and PCB damage after detachment.

2. The assembly mode that adopts a plurality of normal cards and/or tangential cards and a plurality of reference columns to combine together adopts this kind of assembly mode, and the tangential card reliability of insulating skeleton is general, and thereby the condition that insulating skeleton can produce the shrink when the stator dip coating leads to the difficult assembly of PCB board, and insulating skeleton normal card, cut Xiang Kayi fracture during the assembly, the too big circumstances of damaging of PCB board atress during the assembly still probably appears.

As can be seen from fig. 1 to fig. 4, an insulating framework 1' of an existing motor is provided with 4 normal cards 3' and 4 positioning columns 4', the insulating framework 1' of the motor is assembled with a PCB board 2' by adopting an assembly mode of combining and positioning the 4 normal cards 3' and the 4 positioning columns 4', after the stator is painted, the insulating framework 1' deforms, the normal cards 3' become hard, the positioning columns 4' have the problem of residual paint, when the PCB board 2' is assembled, the PCB board 2' is difficult to install, the normal cards 3' of the insulating framework 1' are likely to break, and even the phenomenon that the PCB board 2' is damaged due to overlarge stress occurs.

Based on the above, there is a need for an assembly structure of an insulating framework and a PCB, a motor having the assembly structure of the insulating framework and the PCB, and an air conditioner having the motor, so as to solve the above technical problems existing in the assembly structure of the insulating framework and the PCB.

Disclosure of Invention

The first object of the invention is to provide an assembly structure of an insulating framework and a PCB, which solves the problems that the assembly of the insulating framework and the PCB is difficult and the installation is unreliable, the assembly of the insulating framework and the PCB is difficult, the disassembly of the PCB is difficult, the framework and the PCB are easy to damage during the repair, and the PCB is damaged due to overlarge stress in the assembly process of the insulating framework and the PCB.

The second object of the invention is to provide a motor comprising the above-mentioned assembly structure of the insulating framework and the PCB board.

A third object of the present invention is to propose an air conditioner comprising a motor as described above.

To achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an insulating skeleton and PCB board assembly structure, includes the location structure of setting on insulating skeleton outer wall for the PCB board of restriction assembly is along axial and circumference drunkenness, still includes the screw hole, the screw hole setting is in the relative position department with location structure on the outer wall, is used for insulating skeleton and PCB board fixed connection.

As an insulation framework and PCB board assembly structure's preferred scheme, be provided with two at least buckles on the outer wall, be provided with on the outward flange of PCB board with buckle complex two at least draw-in grooves, the buckle includes circumference spacing portion and the axial spacing portion that mutually perpendicular set up, and after the assembly PCB board, axial spacing portion laminates with the upper surface of PCB board, and circumference spacing portion laminates with the draw-in groove inner wall mutually.

As a preferable scheme of the assembly structure of the insulating framework and the PCB, at least one stud is arranged at the position, opposite to the positioning structure, on the outer wall, and a threaded hole is formed in the top of the stud.

As a preferable scheme of the assembly structure of the insulating framework and the PCB, a limiting structure is arranged at the position, opposite to the positioning structure, on the outer wall.

As an optimal scheme of the assembly structure of the insulating framework and the PCB, the limiting structure is at least one positioning column uniformly distributed on the outer wall, and at least one positioning hole for the positioning column to penetrate is formed in the PCB.

As a preferable scheme of the assembly structure of the insulating framework and the PCB, the positioning columns and the threaded holes are arranged at intervals.

As a preferable scheme of the assembly structure of the insulating framework and the PCB, the top surface of the stud is higher than the mounting surface of the mounting positioning column on the outer wall.

As an optimal scheme of the assembly structure of the insulating framework and the PCB, the buckle, the stud and the positioning column are integrated with the insulating framework into an injection molding structure.

An electric motor comprising the insulating skeleton and PCB board assembly structure as described above.

An air conditioner comprising a motor as described above.

The beneficial effects of the invention are as follows:

the invention provides an assembly structure of an insulating framework and a PCB, wherein the insulating framework limits the assembled PCB in the axial direction and the circumferential direction through a positioning structure arranged on the outer wall of the insulating framework, and meanwhile, the insulating framework is firmly assembled with the PCB through threaded holes arranged at the opposite positions of the outer wall of the insulating framework and the positioning structure. Compared with the existing assembly structure of the insulating framework and the PCB, the assembly reliability and the assembly efficiency can be improved while the combination strength of the insulating framework and the PCB is ensured, the PCB is good in fixing effect, the PCB is easy to disassemble, the insulating framework and the PCB are prevented from being damaged, and the production cost is reduced; in addition, in the assembly process of the insulating framework and the PCB, the PCB is not stressed, so that the problem of damage to the PCB is avoided.

Drawings

FIG. 1 is a perspective view of a prior art insulating framework;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is an exploded view of an assembly of a prior insulating skeleton with a PCB board;

fig. 4 is an assembled perspective view of a conventional insulating skeleton and a PCB board;

fig. 5 is a front view of an insulating skeleton provided in an embodiment of the present invention;

FIG. 6 is a side view of an insulating framework provided in an embodiment of the present invention;

fig. 7 is a perspective view of an insulating framework provided in an embodiment of the present invention;

FIG. 8 is a partial enlarged view at B in FIG. 7;

fig. 9 is an exploded view of an insulating skeleton and a PCB board according to an embodiment of the present invention;

fig. 10 is an assembled perspective view of an insulating skeleton and a PCB board according to an embodiment of the present invention.

In the figure:

1', an insulating framework; 2', a PCB board; 3', normal card; 4', positioning columns;

1. an insulating skeleton; 2. a PCB board; 21. a clamping groove; 22. a thread groove; 23. positioning holes; 3. a threaded hole; 4. a buckle; 41. a circumferential limit part; 42. an axial limit part; 5. a stud; 6. and positioning columns.

Detailed Description

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

As shown in fig. 5 to 10, the present embodiment provides a preferred assembly structure of an insulating frame and a PCB board, which includes a positioning structure disposed on an outer wall of the insulating frame 1 and used for limiting the assembled PCB board 2 from moving along the axial direction and the circumferential direction, and further includes a threaded hole 3, where the threaded hole 3 is disposed on the outer wall 1 and opposite to the positioning structure, and is used for fixedly connecting the insulating frame 1 with the PCB board 2.

In this embodiment, as shown in fig. 9, the positioning structure is two buckles 4 disposed on the outer wall of the insulating framework 1, and two clamping grooves 21 matched with the buckles 4 are disposed on the outer edge of the pcb 2. Referring to fig. 6 and 8, the buckle 4 is preferably an "L" buckle, and includes a circumferential limit portion 41 and an axial limit portion 42 that are disposed perpendicular to each other, where the axial limit portion 42 is disposed parallel to the insulating frame 1, the circumferential limit portion 41 is disposed perpendicular to the insulating frame 1, one end of the circumferential limit portion 41 is fixed at the top of the outer wall of the insulating frame 1, and the other end is connected with one end of the axial limit portion 42. After the PCB 2 is assembled, the axial limiting part 42 is just attached to the upper surface of the PCB 2, and the circumferential limiting part 41 is attached to the inner wall of the clamping groove 21 of the PCB 2. The setting of buckle structure can carry out axial and circumferential spacing to PCB board 2, has avoided PCB board 2 along axial and circumferential free play of assembly.

Preferably, as shown in fig. 7 and 9, three studs 5 are arranged on the outer wall of the insulating framework 1 at positions opposite to the two buckles 4, threaded holes 3 are formed in the tops of the three studs 5, three thread grooves 22 are formed in the outer edge of the PCB 2 at positions opposite to the three threaded holes 3, and the PCB is assembled by sequentially penetrating through the thread grooves 22 and the threaded holes 3 by adopting three tapping screws.

The positions, opposite to the two buckles 4, on the outer wall of the insulating framework 1 are also provided with limiting structures, and the limiting structures are used for further limiting the PCB 2 when the PCB 2 is assembled. In this embodiment, referring to fig. 7 and 9, the limiting structure is preferably two positioning posts 6 uniformly distributed on the outer wall of the insulating framework 1, and two positioning holes 23 for penetrating the positioning posts 6 are provided on the pcb 2 at positions opposite to the two positioning posts 6.

During assembly, the two clamping grooves 21 of the PCB 2 are clamped on the two buckles 4 on the outer wall of the insulating framework 1, the two positioning holes 23 on the PCB 2 are aligned with the two positioning columns 6 on the insulating framework 1, and after the PCB 2 is positioned, tapping screws are used to firmly fix the PCB 2 on the insulating framework 1. When the PCB 2 is to be removed, the self-tapping screw is removed, and then the PCB 2 is taken out.

The insulating skeleton of this embodiment is through two buckles 4 and three self tapping screw with insulating skeleton 1 and PCB board 2 firmly assemble together. Compared with the existing assembly structure of the insulating framework and the PCB, the assembly reliability and the assembly efficiency are improved while the bonding strength of the insulating framework 1 and the PCB 2 are ensured, the fixing effect of the PCB 2 is good, the PCB 2 is easy to disassemble after the insulating framework 1 and the PCB 2 are assembled, the insulating framework 1 and the PCB 2 are prevented from being damaged, and the production cost is reduced; in addition, in the assembly process of the insulating framework 1 and the PCB 2, the PCB 2 is not stressed, so that the problem of damage to the PCB 2 is avoided.

The two positioning columns 6 and the three studs 5 are arranged at intervals, so that the PCB 2 can be stressed uniformly in the assembly process, and the damage of the PCB 2 is avoided.

Further, referring to fig. 6, the top surface of the stud 5 is higher than the mounting surface on the outer wall of the insulating framework 1, and the height H of the stud is selected according to the residual paint condition of the positioning post after the stator is immersed in the paint. After the stator is dipped in the paint, the shrinkage deformation of the insulating framework 1 can not lead to the fracture of the buckle 4 during the assembly, so that the influence on the assembly of the PCB 2 possibly existing after the insulating framework 1 is dipped in the paint is greatly eliminated.

The buckle 4, the stud 5 and the positioning column 6 are integrated with the insulating framework 1 into an injection molding structure, so that the insulating framework is convenient to manufacture, low in production cost and high in structural strength.

The embodiment provides a motor, wherein the motor comprises the insulating framework and PCB assembly structure.

The embodiment also provides an air conditioner, which comprises the motor.

The technical principle of the present invention is described in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the invention and should not be taken in any way as limiting the scope of the invention. Other embodiments of the invention will be apparent to those skilled in the art from consideration of this specification without undue burden.

Claims

1. The assembly structure of the insulating framework and the PCB comprises a positioning structure arranged on the outer wall of the insulating framework and used for limiting the assembled PCB to move along the axial direction and the circumferential direction, and is characterized by further comprising a threaded hole, wherein the threaded hole is arranged at the position, opposite to the positioning structure, on the outer wall and used for fixedly connecting the insulating framework with the PCB;

the PCB is provided with at least one positioning hole for the positioning column to pass through, and the top surface of the stud is higher than the mounting surface of the positioning column on the outer wall;

the positioning structure is two buckles arranged on the outer wall, two clamping grooves matched with the buckles are formed in the outer edge of the PCB, and the buckles, the studs and the positioning columns are of an integral injection molding structure with the insulating framework.

2. The assembly structure of the insulating framework and the PCB board according to claim 1, wherein the buckle comprises a circumferential limit portion and an axial limit portion which are perpendicular to each other, and after the PCB board is assembled, the axial limit portion is attached to the upper surface of the PCB board, and the circumferential limit portion is attached to the inner wall of the clamping groove.

3. The insulating skeleton and PCB board assembly structure of claim 1, wherein the locating posts are spaced from the threaded holes.

4. An electric machine comprising the insulating skeleton and PCB board assembly structure of any one of claims 1 to 3.

5. An air conditioner comprising the motor as claimed in claim 4.