CN114665668A

CN114665668A - Brushless motor

Info

Publication number: CN114665668A
Application number: CN202210421860.7A
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: 2022-04-21
Filing date: 2022-04-21
Publication date: 2022-06-24

Abstract

The invention relates to the technical field of brushless motors, and discloses a brushless motor, which comprises: a housing for housing mechanical components; the metal bearing seat is arranged in the shell, the PCB is sleeved on the metal bearing seat, more than one conductive piece is arranged on the PCB, and the conductive piece is arranged on one side of the metal bearing seat; the insulating part is arranged between the conductive parts and the metal bearing seats, and the insulating part isolates the conductive parts from the metal bearing seats. The invention can effectively solve the problem that creepage or bad electricity easily occurs between the conductive piece and the metal bearing seat.

Description

Brushless motor

Technical Field

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

Background

The brushless motor avoids the generation of electric sparks due to the elimination of the electric brush, has the advantages of low noise and long service life, and is widely used in the market.

In the existing brushless motor on the market, because the distance between a welding point on a PCB and a bearing seat made of metal materials is too close, the problems of insufficient electrical clearance and insufficient creepage distance exist, and the brushless motor is not suitable for practical use.

Disclosure of Invention

The present invention is directed to overcoming the above-mentioned problems in the prior art, and providing a solution to the above-mentioned problems in the related art.

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

a brushless motor comprising:

a housing for housing mechanical components;

a metal bearing housing mounted within the housing;

the PCB board is sleeved on the metal bearing seat, more than one conductive piece is arranged on the PCB board, and the conductive piece is arranged on one side of the metal bearing seat;

the insulating part is arranged between the conductive piece and the metal bearing seat, and the insulating part is used for isolating the conductive piece from the metal bearing seat.

Further, the insulation part is higher than the conductive member.

Further, the coil insulation structure comprises an insulation frame, wherein the insulation frame comprises a circular ring part and a protruding part extending along the radial direction of the circular ring part, the protruding part is used for installing an iron core and a coil, the insulation frame is arranged in the shell, and the circular ring part and the insulation part are of an integral structure.

Further, the conductive piece is a PIN needle, and the PIN needle is electrically connected with the coil.

Furtherly, be equipped with the more than one rib that outwards extends on the insulating part, be equipped with on the PCB board with rib complex bayonet socket, the rib is followed the tooth root of ring portion to the insulating part extends.

Further, the tip of rib is equipped with towards the enclosing part that PIN foot surrounds.

Furthermore, more than one convex strip is arranged on the joint surface of the insulating part and the metal bearing seat.

Furthermore, the outer side of the insulating part is provided with a buckling position for fixing the PCB.

Furthermore, the rib is provided with a limiting structure for fixing the PCB.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the metal bearing seat is separated from the PIN of the PCB by the insulating part, so that enough electrical distance and creepage distance can be reserved, and the PCB is more suitable for practical use.

Further, set up the rib on the insulating part, can further guarantee sufficient electric clearance and creepage distance of the side of PIN needle and metal bearing frame through the rib, simultaneously, the rib can be as the positioning basis, is convenient for install and strengthen its structural strength to the PCB board.

Drawings

FIG. 1 is a schematic diagram of the present invention.

FIG. 2 is another perspective view of the present invention.

Fig. 3 is a partial structural schematic view of fig. 1.

Fig. 4 is a schematic diagram of the explosive structure of the present invention.

Fig. 5 is a schematic structural view of the insulating frame.

Fig. 6 is a schematic structural view of a PCB board.

Fig. 7 is a schematic view of various embodiments of the enclosure.

Fig. 8 is a schematic view of several embodiments of a spacing structure.

Reference numerals: 1. a housing; 2. a metal bearing seat; 3, PCB board; 4. a conductive member; 5. an insulating section; 6. an insulating frame; 7. a circular ring part; 8. a protrusion; 9. a rib; 10. a bayonet; 11. a surrounding part; 12. a convex strip; 13. buckling; 14. a limiting structure.

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, the meaning of "a number" or "a plurality" is 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 6, a brushless motor includes: a housing 1 for housing mechanical components; the metal bearing seat 2 is installed in the shell 1, the PCB 3 is sleeved on the metal bearing seat 2, more than one conductive piece 4 is arranged on the PCB 3, and the conductive piece 4 is arranged on one side of the metal bearing seat 2; and the insulating part 5 is arranged between the conductive piece 4 and the metal bearing seat 2, and the insulating part 5 isolates the conductive piece 4 from the metal bearing seat 2.

In view of the technical problems described in the background art, due to the fact that the distance between the conductive member 4 on the PCB 3 and the metal bearing seat 2 is too short, the electrical gap and the creepage distance are not sufficient, for the problem, some metal bearing seats 2 are made of plastic materials, the heat dissipation problem is poor, and the like, and some conductive members 4 on the PCB 3 are coated with insulating glue, so that the problems of missing coating or uneven coating occur.

In this regard, the main purpose of the brushless motor is to separate the metal bearing housing 2 from the conductive member 4 on the PCB board 3 by providing the insulating portion 5, thereby ensuring a sufficient electrical gap and creepage distance.

In this embodiment, conductive member 4 on PCB 3 is mainly the PIN, and the PIN is after the coil winding electric connection with brushless motor, extends to PCB 3 position and carries out spot welding, through adopting insulating part 5 that insulating material formed to separate the PIN on metal bearing frame 2 and the PCB 3, thereby guarantee sufficient electric clearance and creepage distance.

As shown in fig. 1 and 3, the insulating part 5 is higher than the conductive member 4.

In actual use, the position of the PIN needle of the PCB 3 needs enough soldering tin amount, the height of the insulating part 5 is required to ensure the strength of spot welding, and the height of the insulating part 5 is higher than the welding point of the PIN needle, so that the creepage distance can be ensured.

The horizontal cross-sectional area of the insulating part 5 is an arc line. In this embodiment, the insulating portion 5 is in the form of a convex arc segment, and certainly, the insulating portion 5 can also be in the form of a straight line or a curved line segment to achieve the purpose of isolating the PIN from the metal bearing seat 2.

Referring to fig. 4 and 5, the present invention includes an insulating frame 6, where the insulating frame 6 includes a circular ring portion 7 and a protrusion portion 8 extending along a radial direction of the circular ring portion 7, the protrusion portion 8 is used for mounting an iron core and a coil, the insulating frame 6 is disposed in the housing 1, and the circular ring portion 7 and the insulating portion 5 are an integral structure.

In this embodiment, the brushless motor adopts the insulating frame 6 as the installation base, and the coil is wound on the position of the protruding portion 8 to increase the magnetic flux through the installation iron core, so as to facilitate the arrangement of the insulating portion 5, the insulating portion 5 and the ring portion 7 are integrated into a whole, and are formed into a whole through injection molding, thereby being more convenient to manufacture structurally.

As shown in fig. 3 to 6, the insulating portion 5 is provided with more than one rib 9 extending outward, the PCB 3 is provided with a bayonet 10 engaged with the rib 9, and the rib 9 extends from the root of the circular ring portion 7 to the insulating portion 5.

The rib 9 structure can be tightly installed for improving the PCB 3, one or more ribs 9 can be selected according to the number of the ribs 9, wherein the initial position of the rib 9 extends upwards from the tooth root position of the annular part 7, the first advantage is that the insulating frame 6 can be conveniently and integrally demoulded on a mould, the second advantage achieves the function of improving the structural strength because the position and the thickness of the rib 9 influence the demoulding of the mould, the third advantage is that the rib 9 can keep enough electric clearance and creepage distance between the PIN PIN and the side surface of the metal bearing seat 2, the fourth advantage is adjusted according to the thickness of the rib 9, the rib 9 can be used for assembling and positioning, and the PCB 3 can be conveniently and quickly installed; the fifth advantage is that the rib 9 is assembled with the bayonet 10 on the PCB 3, reducing the gap and preventing resonance.

The end of the rib 9 is provided with an enclosing part 11 which is surrounded towards the PIN, the arranged enclosing part 11 mainly further ensures the electric gap and the creepage distance, and on the other hand, because the enclosing part 11 protects the welding point of the PIN on the PCB 3, in use, the enclosing part 11 can be made vertical relative to the rib 9, for example, the rib 9 is in an L-shaped or T-shaped form, or the enclosing part 11 is made in a bent form, for example, a J-shaped form, any form which can protect the welding point and achieve the sufficient electric gap and creepage distance can be also called the enclosing part 11.

The insulating part 5 with the metal bearing frame 2 binding face is equipped with more than one sand grip 12, the outside of insulating part 5 is equipped with right PCB board 3 carries out the knot position 13 of fixing.

The convex strips 12 are in interference fit between the insulating frame 6 and the metal bearing seat 2, and then the PCB 3 is firmly fixed under the action of the buckling positions 13.

Furthermore, a limiting structure 14 for fixing the PCB board 3 is arranged on the rib 9. The limiting structure 14 is used for canceling the buckling positions 10, so that structural optimization is achieved, as shown in the figure, the limiting structure 14 can be provided with round bar groups which are arranged in parallel on the side faces of the ribs 9, the distance between the circles is the thickness of the PCB 3, and the PCB 3 is assembled through the round bars. Or, the rib 9 is longitudinally prepared, the upper end of the rib 9 is in a wedge shape, the thickness of the upper end of the rib 9 is smaller than the bayonet 10 of the PCB 3, and the thickness of the lower end of the rib 9 is larger than the bayonet 10 of the PCB 3, so that the PCB 3 is fixed by pressing to form an interference fit.

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 brushless motor, comprising:

a housing for housing mechanical components;

a metal bearing housing mounted within the housing;

2. The brushless electric machine according to claim 1, wherein: the insulating part is higher than the conductive parts.

3. The brushless electric machine according to claim 1, wherein: including insulating frame, insulating frame include ring portion and with follow the radial protruding portion that extends of ring portion, the protruding portion is used for installing iron core and coil, insulating frame arranges in the casing, ring portion with insulating portion structure as an organic whole.

4. The brushless electric machine of claim 3, wherein: the conductive piece is a PIN needle, and the PIN needle is electrically connected with the coil.

5. The brushless electric machine of claim 4, wherein: be equipped with the rib of more than the outside extension on the insulating part, be equipped with on the PCB board with rib complex bayonet socket, the rib is followed the tooth root of ring portion to the insulating part extends.

6. The brushless electric machine of claim 5, wherein: the tip of rib is equipped with towards the enclosing portion that PIN needle surrounded.

7. The brushless electric machine according to claim 1, wherein: the joint surface of the insulating part and the metal bearing seat is provided with more than one raised line.

8. The brushless electric machine of claim 7, wherein: and a fastening position for fixing the PCB is arranged on the outer side of the insulating part.

9. The brushless electric machine of claim 6, wherein: and the rib is provided with a limiting structure for fixing the PCB.