CN114696543A

CN114696543A - Partition method of brushless motor

Info

Publication number: CN114696543A
Application number: CN202210437709.2A
Authority: CN
Inventors: 由忠磊; 陈丽德
Original assignee: Dongguan Jinrun Motor Technology Co ltd
Current assignee: Dongguan Jinrun Motor Technology Co ltd
Priority date: 2022-04-25
Filing date: 2022-04-25
Publication date: 2022-07-01

Abstract

The invention relates to the technical field of brushless motors, and discloses a partition method of a brushless motor, which is applied to the brushless motor, wherein the brushless motor comprises a metal bearing seat and a PCB (printed Circuit Board), at least more than one PI N pin is arranged on the PCB, and the PI N pin is arranged on one side of the metal bearing seat, and the partition method comprises the following steps: and the PI N pin and the metal bearing seat are isolated by adopting an insulating structure to conduct electricity. The partition method can ensure the electric clearance and creepage distance between the PI N pin and the metal bearing seat, and improve the usability of the brushless motor.

Description

Partition method of brushless motor

Technical Field

The invention relates to the technical field of brushless motors, in particular to a partition method of a brushless motor.

Background

The brushless motor has the advantages of low noise, long service life and the like due to the fact that the electric brush is omitted, and the brushless motor is widely used. Because brushless motor is in the in-process of production, the distance between PIN foot and the metal bearing frame on its PCB board is too close, under the environment of air humidity or under the dust environment, easily takes place electrically conductively between PIN foot and the metal bearing frame to influence in-service use.

Disclosure of Invention

The invention provides a partition method of a brushless motor to solve the problems in the background art, which aims to overcome the defects in the prior art.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a partition method of a brushless motor is applied to the brushless motor, wherein the brushless motor comprises a metal bearing seat and a PCB board, at least more than one PIN foot is arranged on the PCB board, and the PIN foot is arranged on one side of the metal bearing seat, and comprises the following steps:

and insulating structures are adopted to isolate the PIN feet from the metal bearing seat for conducting electricity.

Further, comprising: the brushless motor comprises an injection molding frame, the injection molding frame is used for installing and winding coils, and the injection molding frame and the insulation structure are formed into an integral structure through injection molding.

Further, comprising: a branch part is arranged on the insulation structure, and the PIN foot and the metal bearing seat are isolated by the branch part and are electrically conductive.

Further, comprising: and arranging an enclosing part on the branch part, wherein the enclosing part is used for protecting the PIN foot.

Further, comprising: and extending the branch part from the tooth root part of the injection molding frame to form positioning fit of the PCB.

Further, comprising: set up more than one sand grip on insulation system's the inboard, the sand grip with metal bearing seat interference fit sets up in insulation system's the outside and detains the position, through it is right to detain the position PCB board lock.

Further, comprising: and arranging a limiting structure on the branch part, and matching and fixing the PCB through the limiting structure.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the PIN feet on the PCB and the metal bearing seat are isolated and electrically conducted by adopting the joint edge structure, so that enough electric clearance and creepage distance can be ensured.

Further, the insulating structure and the injection molding frame are manufactured into an integral structure, so that the structure is simplified, and the insulating structure is convenient to arrange.

Further, adopt on insulation system to set up a portion form, can completely cut off electrically conductive between PIN foot and the metal bearing frame on the side, can adjust the thickness of a portion, regard a portion as positioning, the PCB board of being convenient for is installed fixedly, simultaneously, can improve structural strength.

Furthermore, the PCB is fixedly installed through the limiting structure, and the structure is optimized.

Drawings

Fig. 1 is a schematic diagram of a brushless motor embodying the present invention.

Fig. 2 is another perspective schematic view of the brushless motor of fig. 1.

Fig. 3 is a partially enlarged schematic view of fig. 1.

Fig. 4 is an exploded view of a brushless motor embodying the present invention.

FIG. 5 is a schematic view of an injection molded frame construction embodying the present invention.

Fig. 6 is a partial schematic view of fig. 5.

Fig. 7 is a schematic structural view of a PCB board.

Fig. 8 is a schematic diagram of a practical enclosure structure.

Fig. 9 is a schematic diagram of a practical limit structure.

Reference numerals: 1. a metal bearing seat; 2, PCB board; 3, PIN foot; 4. an insulating structure; 5. injection molding the frame; 6. a branch portion; 7. a surrounding part; 8. a convex strip; 9. and (6) buckling the position.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiments described by referring to the drawings are exemplary and intended to be used for explaining the present application and are not to be construed as limiting the present application. In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

As shown in fig. 1 to 9, a partition method of a brushless motor is applied to a brushless motor, wherein the brushless motor includes a metal bearing seat 1 and a PCB 2, the PCB 2 is provided with at least one PIN 3, and the PIN 3 is disposed on one side of the metal bearing seat 1, and the method includes the following steps: and insulating structures 4 are adopted to isolate the PIN PINs 3 from the metal bearing seat 1 for conducting electricity.

In view of the technical problems described in the background art, the main objective of the partition method is to provide the insulation structure 4 on the PIN 3 and the insulation structure 4 to isolate the PIN 3 from the metal bearing seat 1 for conducting, in use, the insulation structure 4 is embodied as a raised structure made of an insulation material, for example, a raised arc segment structure, a raised straight segment structure or a raised curved structure, and meanwhile, in order to ensure a sufficient creepage distance, in use, certain requirements are required for the height of the insulation structure 4, and a proper height is selected according to actual use conditions, and generally, the height of the insulation structure 4 is set to be higher than the height of the PIN 3.

As shown in fig. 4 to 6, the method for isolating a brushless motor further includes: the brushless motor comprises an injection molding frame 5, the injection molding frame 5 is used for installing and winding coils, and the injection molding frame 5 and the insulation structure 4 are in an injection molding integrated structure.

Its structure of frame 5 of moulding plastics is the ring body in the middle of, and the tooth portion that extends is distributed to circumference array around the ring body, and the tooth portion is used for carrying out the coil coiling, and structurally, if independently set up insulation system 4, then increased manufacturing cost, to this, because frame 5 of moulding plastics also adopts insulating material injection moulding, thereby, structurally adopt integrative injection moulding mode with insulation system 4 and frame 5 of moulding plastics.

As shown in fig. 3 to 7, the method for isolating a brushless motor includes: a branch part 6 is arranged on the insulating structure 4, and the PIN foot 3 and the metal bearing seat 1 are isolated by the branch part 6 and are conducted.

In this embodiment, since the metal housing 1 has a plurality of lugs protruding outward, the lugs and the PIN legs 3 still have the problem of electrical clearance and creepage distance on the side surface, for which the branch portions 6 can insulate the PIN legs 3 from the metal housing 1 for conduction on the side surface, and can leave sufficient electrical clearance and creepage distance.

Simultaneously, on brushless motor's mounting structure, relate to PCB board 2's assembly problem, need fix a position at the in-process of assembly, because the wire winding has been installed to tooth portion on injection frame 5, to tooth root position department, owing to set up the hollow cylinder structure that supplies to pass through in the PIN needle, the tooth root is close to the position department of cylinder structure and can't realize the wire winding, lead to this position vacant space to appear, for utilizing this vacant space, begin to extend (the drawing of patterns operation of the injection mold of being convenient for) on the tooth root position of frame 5 from injection frame, on the one hand, can improve its structural strength, on the other hand is through the thickness of adjusting branch portion 6, realize quick location as the location benchmark through branch portion 6, be convenient for PCB board 2 corresponds the setting and the breach assembly of branch portion 6 complex, reduce the clearance, reduce resonance strength.

Referring to fig. 8, the method for blocking a brushless motor further includes: an enclosure 7 is provided on the leg 6, wherein the enclosure 7 is used to protect the PIN 3. The enclosing part 7 is specifically used for enclosing the PIN foot 3 and can protect the PIN foot 3, and the enclosing part 7 can be further extended at the tail end of the branch part 6, such as a straight line or a curve.

Referring to fig. 5 and 6, the method for isolating a brushless motor further includes: set up more than one sand grip 8 on insulation system 4's the inboard, sand grip 8 with 1 interference fit of metal bearing frame sets up in insulation system 4's the outside and detains position 9, through it is right to detain position 9 PCB board 3 locks.

The invention further provides a mounting mode of the PCB 3, the mounting problem of the PCB 3 is considered on the basis of the insulating structure 4, because the insulating structure 4 is arranged on the injection molding frame 5, in order to achieve the precision of assembly, the injection molding frame 5 is structurally provided with a raised line 8 on the inner side matched with the metal bearing seat 1, the raised line and the metal bearing seat are in interference fit, and further, the PCB 3 is buckled by arranging a buckling position 9 on the outer side.

Referring to fig. 9, the method for isolating the brushless motor includes: a limiting structure is arranged on the branch part 6, and the PCB 3 is matched and fixed through the limiting structure. Adopt the mode of detaining position 9 to carry out the lock in the aforesaid, in this embodiment, another kind of equipment mode to PCB board 3 is provided, utilize branch portion 6 as the basis, carry out structural setting on it, install fixedly PCB board 3, for example, can set up the form of bump or sand grip on branch portion 6, bump or sand grip distribute from top to bottom, the distance that distributes is PCB board 3's thickness, PCB board 3 is fixed on branch portion 6 through the mode of pressing, or, prepare for the wedge in 6 fore-and-aft upper ends of branch portion, 6 fore-and-aft upper ends of branch portion are less than the width of 3 breachs of PCB board, the lower extreme of branch portion 6 is greater than the width of the breach of PCB board 3, thereby realize firm equipment.

The technical scope of the present invention is not limited to the above embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims

1. A partition method of a brushless motor is applied to the brushless motor, wherein the brushless motor comprises a metal bearing seat and a PCB board, at least more than one PIN foot is arranged on the PCB board, and the PIN foot is arranged on one side of the metal bearing seat, and is characterized by comprising the following steps:

2. The method of isolating a brushless motor according to claim 1, comprising:

the brushless motor comprises an injection molding frame, the injection molding frame is used for installing and winding coils, and the injection molding frame and an insulation structure are formed into an integral structure through injection molding.

3. The method of isolating a brushless motor according to claim 2, comprising:

a branch part is arranged on the insulating structure, and the PIN foot and the metal bearing seat are isolated by the branch part and are electrically conducted.

4. The method of isolating a brushless motor according to claim 3, comprising:

and arranging an enclosing part on the branch part, wherein the enclosing part is used for protecting the PIN foot.

5. The method of isolating a brushless motor according to claim 3, comprising:

and extending the branch part from the tooth root part of the injection molding frame to form positioning fit of the PCB.

6. The method of isolating a brushless motor according to claim 1, comprising:

set up more than one sand grip on insulation system's the inboard, the sand grip with metal bearing seat interference fit sets up in insulation system's the outside and detains the position, through it is right to detain the position PCB board lock.

7. The method of isolating a brushless motor according to claim 3, comprising:

and arranging a limiting structure on the branch part, and matching and fixing the PCB through the limiting structure.