CN217282421U

CN217282421U - Compact brushless motor

Info

Publication number: CN217282421U
Application number: CN202122112196.1U
Authority: CN
Inventors: 吕健; 周毅; 张沃铭
Original assignee: Guangdong Powerful Motor Co ltd
Current assignee: Guangdong Powerful Motor Co ltd
Priority date: 2021-09-02
Filing date: 2021-09-02
Publication date: 2022-08-23
Anticipated expiration: 2031-09-02

Abstract

The utility model discloses a compact brushless motor, which comprises a stator module, wherein the stator module comprises an iron core and a coil, and the coil is provided with a wire outlet end and a wire inlet end; the stator module is provided with a convergence plate, and the convergence plate comprises an insulating support; an inner connecting conducting strip is arranged on the inner side of the insulating support and is used for being electrically connected with the wire outlet end of the coil; an external connection conducting strip is arranged on the outer side of the insulating support and is used for being electrically connected with the wire inlet end of the coil, and an external connection end is arranged on the external connection conducting strip; through adopting interior connection conducting strip, outer connection conducting strip to separately the wiring of the leading-out terminal and the inlet wire end of coil and through the fixed design of convergent dish, can make the less or more brushless motor of coil figure of size also can wiring very easily, pulled open the distance between the conducting strip moreover, avoided the problem that the clearance undersize between the conducting strip, between the binding post caused.

Description

Compact brushless motor

Technical Field

The utility model relates to a brushless motor technical field, especially a more compact, more reliable brushless motor of structure.

Background

Brushless motors generally use a winding form in which a plurality of winding coils are connected in parallel to reduce loss due to coil impedance, and the winding coils wound around a stator core need to be collectively connected by a bus plate. The disc of converging comprises injection moulding's insulating support and a plurality of connection conducting strips of embedding insulating support, is provided with a plurality of binding post on the connection conducting strip and distributes along insulating support circumferencial direction. The number of wire ends required to be connected by coils wound on the motor split iron core is 2 times of the number of stator slots of the motor, and the number of the wiring terminals on the bus disc corresponds to the number of the wire ends of the coils on the stator.

With the increase of the number of the stator windings of the brushless motor, the number of the wiring terminals on the connection conducting plates of the bus discs is increased. However, due to the limitation of the motor structure to the size of the bus bar, the gap between the connection terminals on the connection conductive plates along the circumferential direction of the insulating support can only be reduced, which may cause the following problems: 1. in the process of welding the winding coil and the wiring terminals, space limitation can be generated due to small gaps among the wiring terminals; 2. in the welding operation, because the clearance between the connecting terminals is very small, extra contact is generated between the adjacent connecting terminals due to welding deformation after welding, and the electric insulation is difficult to realize; 3. because the gaps between the connecting conducting strip parts are very small, and the materials are very thin, the embedding injection molding operation of the connecting conducting strips is not easy to implement, and the preset position gaps are not easily kept between the connecting conducting strips in the injection molding process, so that the dielectric breakdown is generated between the connecting conducting strips in the confluence disc.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a compact brushless motor.

The utility model provides a technical scheme that its technical problem adopted is: the compact brushless motor comprises a stator module, a stator module and a motor, wherein the stator module comprises an iron core and a coil, and the coil is provided with an outlet terminal and an inlet terminal; the stator module is provided with a convergence plate, and the convergence plate comprises an insulating support; an inner connecting conducting strip is arranged on the inner side of the insulating support and is used for being electrically connected with the wire outlet end of the coil; and an external connection conducting strip is arranged on the outer side of the insulating support and is used for being electrically connected with the wire inlet end of the coil, and an external connection end is arranged on the external connection conducting strip.

According to the utility model provides a compact brushless motor, through adopting in-connection conducting strip, outer connection conducting strip to separately the wiring end and the inlet wire end of coil and separately wiring and through the fixed design of convergent dish, can make the less or more brushless motor of coil figure of size also can wiring very easily, has pulled open distance between the conducting strip moreover, has avoided between the conducting strip, the problem that the clearance undersize between the binding post led to the fact.

As some preferred embodiments of the present invention, the stator module comprises a plurality of stator members surrounding an annular stator structure, the stator members comprise stator insulating frames, and the iron core and the coil are located on the stator insulating frames.

As some preferred embodiments of the utility model, be provided with the inserting groove on the stator module, the insulating support outside is provided with the plug connector, the insulating support passes through the plug connector with the stator module the inserting groove is connected.

As some preferred embodiments of the utility model, the insulating support outside is provided with stretches out the piece, the plug connector passes through stretch out the piece with insulating support connects, the plug connector with stretch out the piece and constitute "L" font location bearing structure.

As some preferred embodiments of the present invention, the insulation support is provided with a conductive plate positioning partition wedge groove.

As some preferred embodiments of the present invention, the inner connection conductive piece includes an inner connection arc portion and an inner connection terminal portion.

As some preferred embodiments of the present invention, the inner connection terminal portion is provided with a U-shaped inner connection portion.

As some preferred embodiments of the present invention, the external connection conductive sheet includes an external connection arc portion and an external connection terminal portion, and the external connection terminal portion has an "L" shaped structure and extends outside the bus tray.

As some preferred embodiments of the present invention, the external connection terminal portion is provided with a U-shaped external connection portion.

As some preferred embodiments of the present invention, the outer end is L-shaped.

The beneficial effects of the utility model are that:

1. the inner connecting conducting strip and the outer connecting conducting strip of the bus tray are separated and fixed through the insulating support and are respectively connected with the wire outlet end and the wire inlet end of the coil, so that even if the brushless motor is small in size or the number of the coils is large, enough wiring space can be ensured, and enough distance exists between the conducting strips;

2. a plurality of external connecting conducting strips of the confluence disc are fixed through an insulating bracket, so that sufficient distance is ensured between the external connecting conducting strips corresponding to each phase, and each external connecting terminal part has sufficient wiring space;

the U-shaped wiring part is easier to weld with the tail end of the coil, and the wiring stability is ensured.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a perspective view of the present invention;

fig. 2 is an exploded view of the present invention;

fig. 3 is a perspective view of the stator member of the present invention;

fig. 4 is a perspective view of the confluence disc of the present invention;

fig. 5 is a perspective view of the middle internal connection conductive sheet of the present invention;

fig. 6 is a top view of the external connection conductive sheet (assembled state) in the present invention;

FIG. 7 is a perspective view of the externally connecting conductive strip (in a single piece state) of the present invention

FIG. 8 is a schematic view of the winding state of the present invention (three phases);

fig. 9 is a schematic diagram showing the (three-phase) wire winding of the present invention.

Reference numerals:

the stator comprises a stator module 100, a stator component 110, a stator insulating frame 111, an iron core 112, a coil 113 and an insertion slot 114;

the bus bar 200, the insulating support 210, the plug connector 211, the extension block 212, the conducting strip positioning and isolating wedge groove 213 and the U-shaped hole 214;

an internal connection conductive sheet 220, an internal connection arc portion 221, an internal connection terminal portion 222, and an internal wiring portion 223;

an external connection conductive sheet 230, a first external connection conductive sheet 230-1, a second external connection conductive sheet 230-2, a third external connection conductive sheet 230-3, an external connection arc-shaped portion 231, an external connection terminal portion 232, an external wiring portion 233, and an external terminal 234.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. In the following description, certain specific details are set forth in order to provide a thorough understanding of the present invention. Rather, the invention can be practiced without these specific details, i.e., those skilled in the art can more effectively describe the nature of their work to others skilled in the art using the descriptions and representations herein.

It should be further noted that the terms "upper" and "lower" and the like used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component, and that simple, non-inventive adjustments to such directions by those skilled in the art should not be construed as techniques outside the scope of the present application.

If the description of "first", "second", etc. is used for the purpose of distinguishing technical features, it is not intended to indicate or imply relative importance or to implicitly indicate the number of indicated technical features or to implicitly indicate the precedence of the indicated technical features.

It should be understood that the detailed description and specific examples, while indicating the scope of the disclosure, are intended for purposes of illustration only and are not intended to limit the scope of the disclosure. Well-known manufacturing methods, control procedures, component dimensions, material compositions, pipe layouts, etc., are not described in detail since they are readily understood by those of ordinary skill in the art, to avoid obscuring the present invention.

Fig. 1 is a perspective view of an embodiment of the present invention, and referring to fig. 1, an embodiment of the present invention provides a compact brushless motor including a stator module 100, and the stator module 100 operates in cooperation with a rotor (not shown). Referring to fig. 2 and 3, the stator module 100 includes a core 112 and a coil 113, and the coil 113 has an outlet terminal and an inlet terminal.

Further, referring to fig. 2 and 4, a bus bar 200 is disposed on the stator module 100, and the bus bar 200 includes an insulating support 210.

Further, referring to fig. 5, an inner connection conductive sheet 220 is disposed inside the insulating support 210 for electrically connecting with the outlet terminal of the coil 113.

Still further, referring to fig. 6 and 7, an external connection conductive sheet 230 is disposed outside the insulating support 210 for electrically connecting to the incoming line end of the coil 113. The external connection conductive sheet 230 is provided with an external connection end 234 for externally connecting to a power supply.

The above-disclosed compact brushless motor is only a preferred embodiment of the present invention, and is only used for illustrating the technical solution of the present invention, not limiting the same. It will be understood by those skilled in the art that the foregoing technical solutions may be modified or supplemented by the prior art, or some of the technical features may be replaced by equivalents; and such modifications or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention.

Reference will now be made in detail to some embodiments, wherein "an embodiment" is referred to herein as a particular feature, structure, or characteristic that may be included in at least one implementation of the present application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Furthermore, the details representative of one or more embodiments are not fixedly presented in any particular order, nor are they intended to be limiting of the present invention.

In some embodiments, the stator module 100 has a length extending line extending along the upper and lower sides, and the stator module 100 and the bus bar 200 are respectively arranged on the upper and lower sides of the brushless motor.

In some embodiments, the stator module 100 includes a plurality of stator members 110 surrounding an annular stator structure, i.e., the stator module 100 is an annular structure having an inner through hole. The stator member 110 includes a stator insulation frame 111, and the iron core 112 and the coil 113 are disposed on the stator insulation frame 111 to facilitate assembly of the stator module 100.

In this embodiment, optionally, a rotor is disposed at the through hole inside the annular stator structure.

In some embodiments, the stator module 100 is provided with the insertion slot 114, the insulating support 210 is provided with the insertion piece 211 on the outer side, and the insulating support 210 is connected with the insertion slot 114 of the stator module 100 through the insertion piece 211, so as to facilitate the assembly of the stator module 100 and the bus bar disc 200.

In some embodiments, the insulating support 210 is provided with a protruding block 212 at the outer side, and the plug 211 is connected to the insulating support 210 through the protruding block 212, so that the plug 211 is prevented from blocking the wiring and the terminal of the stator module 100. The plug connector 211 and the extension block 212 form an L-shaped positioning support structure to ensure the connection stability between the stator module 100 and the convergence plate 200.

In some embodiments, the inner connecting conductive strip 220 and the outer connecting conductive strip 230 of the bus bar 200 are inserted into the insulating support 210, so that the inner connecting conductive strip 220 and the outer connecting conductive strip 230 are connected.

In some embodiments, the insulating support 210 is formed by injection molding, that is, by placing the inner connecting conductive strip 220 and the outer connecting conductive strip 230 in a mold, and then injection molding the insulating support 210 to cover (not requiring full covering) the inner connecting conductive strip 220 and the outer connecting conductive strip 230.

In some embodiments, the insulation bracket 210 is provided with a conductive plate positioning and blocking wedge groove 213. In the injection molding process of the current-collecting disc 200, the current plate positioning and isolating wedge groove 213 can position the radial motion and the circular motion of the external connection conducting plate 230 in the current-collecting disc 200, so that the positions and the distances between the internal connection conducting plate 220 and the external connection conducting plate 230, between the external connection conducting plates 230 and between the terminals are ensured, the stability of the manufacturing process is enhanced, and the electrical insulation requirement of the current-collecting disc 200 is ensured to be met.

In some embodiments, referring to fig. 5, the interconnection conductive sheet 220 includes an interconnection arc portion 221 and an interconnection terminal portion 222. The internal connection terminal portions 222 are used for connection with the outlet terminals of the coils 113, and the internal connection arc portions 221 connect the respective internal connection terminal portions 222, that is, the outlet terminals of the respective coils 113 electrically.

In this embodiment, optionally, the inner connection arc portion 221 surrounds the rotor and is located inside the insulating support 210, and the inner connection terminal portion 222 protrudes out of the insulating support 210.

In some embodiments, the inner connection terminal portion 222 is provided with an inner connection portion 223 having a "U" shape, that is, the inner connection portion 223 has an opening, so that the terminal of the outlet end of the coil 113 is inserted and welded to the opening of the inner connection portion 223.

In some embodiments, the insulating holder 210 is provided with a U-shaped hole 214 below the corresponding inner connection terminal, thereby enabling the end of the coil 113 to be easily connected to the inner connection portion 223 of the inner connection terminal portion 222 through the U-shaped hole 214 of the insulating holder 210. The U-shaped holes 214 effectively separate the internal connection conductive sheet 220 from the external connection conductive sheet 230, thereby ensuring the electrical insulation between the internal connection conductive sheet 220 and the external connection conductive sheet 230 and ensuring the reliability of the brushless motor.

In some embodiments, referring to fig. 6 and 7, the outer connecting conductive plate 230 includes an outer connecting arc 231 and an outer connecting terminal portion 232, the outer connecting terminal portion 232 is used for connecting with the line inlet end of the coil 113, and the outer connecting arc 231 connects the outer connecting terminal portions 232, i.e., electrically connects the line inlet ends of the coils 113. The external connection terminal parts 232 are of an L-shaped structure and extend out of the bus bar 200, distances between the external connection terminal parts 232 and the coil 113 are pulled, wiring is facilitated, and safety is improved.

In this embodiment, optionally, the outer connecting arc portion 231 surrounds the rotor and is located inside the insulating support 210, and the outer connecting terminal portion 232 and the outer connecting end 234 extend out of the insulating support 210.

In some embodiments, the external connection terminal portion 232 is provided with an external wiring portion 233 in a "U" shape, i.e., the external wiring portion 233 has an opening, which facilitates insertion and soldering of the end of the wire inlet end of the coil 113 to the external wiring portion 233 at the position of the opening.

In some embodiments, the external connection end 234 is "L" shaped, that is, the external connection end 234 includes a lateral external connection end portion and a vertical external connection end portion, so as to ensure a distance between the external power position of the combiner tray 200 and the coil 113. The external connection end 234 is connected to the external connection arc 231 through the external connection end lateral portion and is externally connected to the power supply through the external connection end vertical portion.

In some embodiments, the inner connecting conductive tab 220 is a single piece, and the outer connecting conductive tab 230 includes three single pieces, namely, a first outer connecting conductive tab 230-1, a second outer connecting conductive tab 230-2, and a third outer connecting conductive tab 230-3.

In this embodiment, optionally, the first external connecting conductive strip 230-1, the second external connecting conductive strip 230-2, and the third external connecting conductive strip 230-3 correspond to U, V, W three-phase connections, respectively, and the specific connection manner refers to fig. 8 and 9.

According to the above principle, the present invention can also make appropriate changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention.

Claims

1. A compact brushless electric machine comprising a stator module (100), the stator module (100) comprising a core (112) and a coil (113), the coil (113) having an outlet end and an inlet end, characterized in that:

the stator module (100) is provided with a confluence disc (200), and the confluence disc (200) comprises an insulating support (210);

an inner connecting conducting strip (220) is arranged on the inner side of the insulating bracket (210) and is used for being electrically connected with the wire outlet end of the coil (113);

an external connection conducting strip (230) is arranged on the outer side of the insulating support (210) and is used for being electrically connected with the wire inlet end of the coil (113), and an external connection end (234) is arranged on the external connection conducting strip (230).

2. A compact brushless electric machine according to claim 1, characterized in that: the stator module (100) comprises a plurality of stator components (110) which surround to form an annular stator structure, the stator components (110) comprise stator insulation frames (111), and the iron core (112) and the coil (113) are located on the stator insulation frames (111).

3. A compact brushless electric machine according to claim 1 or 2, characterized in that: the stator module (100) is provided with an inserting groove (114), the outer side of the insulating support (210) is provided with an inserting piece (211), and the insulating support (210) is connected with the inserting groove (114) of the stator module (100) through the inserting piece (211).

4. A compact brushless electric machine according to claim 3, characterized in that: insulating support (210) outside is provided with stretches out piece (212), plug connector (211) pass through stretch out piece (212) with insulating support (210) are connected, plug connector (211) with stretch out piece (212) and constitute "L" font location bearing structure.

5. A compact brushless electric machine according to claim 1, characterized in that: and a conducting strip positioning and isolating wedge groove (213) is arranged on the insulating bracket (210).

6. A compact brushless electric machine according to claim 1, characterized in that: the interconnection conductive sheet (220) includes an interconnection arc portion (221) and an interconnection terminal portion (222).

7. A compact brushless electric machine according to claim 6, characterized in that: the internal connection terminal part (222) is provided with a U-shaped internal connection part (223).

8. A compact brushless electric machine according to claim 1, characterized in that: the external connection conducting strip (230) comprises an external connection arc-shaped part (231) and an external connection terminal part (232), and the external connection terminal part (232) is of an L-shaped structure and extends out of the outer side of the bus bar disc (200).

9. A compact brushless electric machine according to claim 8, characterized in that: the external connection terminal part (232) is provided with a U-shaped external wiring part (233).

10. A compact brushless electric machine according to claim 1 or 8, characterized in that: the outer end (234) is L-shaped.