CN218162133U - Hollow cup brushless motor - Google Patents

Abstract

The application relates to a coreless brushless motor, which comprises a rotor assembly, a stator assembly and an adjusting assembly; the stator assembly includes a printed wiring board; the adjusting assembly comprises a Hall structure, the Hall structure and the printed circuit board are arranged separately, and the Hall structure can rotate along the circumferential direction of the stator assembly. The user can avoid the restriction of printed circuit board to the hall structure position at the in-process of adjusting the hall structure, is favorable to solving the interference problem between the in-process hall structure of adjusting the hall structure and the printed circuit board, promotes the convenience and the efficiency of adjusting the hall structure, guarantees the reliability of motor operation.

Description

Hollow cup brushless motor

Technical Field

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

Background

With the development of motor technology, the lap-wound coreless brushless motor is more and more widely applied, and the lap-wound coreless brushless motor is more rapid in starting response and stronger in load starting capability compared with a brushless motor without a sensor due to the fact that the lap-wound coreless brushless motor is provided with the Hall sensor, so that the coreless brushless motor with the Hall sensor is widely applied, and for the coreless brushless motor with the sensor, the Hall position of the coreless brushless motor with the Hall sensor needs to be adjusted in the manufacturing process to achieve the optimal phase change position, and therefore the optimal performance of the motor is achieved.

Because the Hall structure of the motor with the sensor in the lap winding type hollow cup in the current market is limited by the internal structure, the stator assembly can interfere with the Hall structure in the process of adjusting the Hall structure, so that the Hall structure in the hollow cup cannot be simply and quickly adjusted, and the running reliability of the motor cannot be effectively ensured.

SUMMERY OF THE UTILITY MODEL

Accordingly, the present invention is directed to a coreless brushless motor capable of simply and rapidly adjusting a hall structure.

A coreless brushless motor comprises a rotor assembly, a stator assembly and an adjusting assembly; the stator assembly includes a printed wiring board; the adjusting assembly comprises a Hall structure, the Hall structure and the printed circuit board are arranged separately, and the Hall structure can rotate along the circumferential direction of the stator assembly.

Foretell hollow cup brushless motor separates the setting through the printed circuit board with among hall structure and the stator module for the user can avoid the printed circuit board to the restriction of hall structure position at the in-process of adjusting hall structure, is favorable to solving the interference problem between the in-process hall structure of adjusting hall structure and the printed circuit board, promotes the convenience and the efficiency of adjusting hall structure, guarantees the reliability of motor operation.

In one embodiment, the rotor assembly further comprises a rotating shaft, the adjusting assembly further comprises a first end cover and a first bearing, the hall structure is fixedly connected with the first end cover, the first end cover is sleeved on the periphery of the first bearing, and the first bearing is rotatably connected to the rotating shaft.

In one embodiment, the hall structure comprises a hall plate and at least two hall elements, a through hole for the rotating shaft to penetrate through is formed in the hall plate, and the at least two hall elements are arranged on the hall plate at intervals along the circumferential direction of the rotating shaft.

In one embodiment, the hall element is welded to the hall plate.

In one embodiment, the hall plate is in threaded engagement with the first end cap.

In one embodiment, the stator assembly further includes a second end cover and a second bearing, the second end cover is sleeved on the outer periphery of the second bearing, and the second bearing is rotatably connected to the rotating shaft and located on one side of the printed circuit board, which faces away from the hall structure.

In one embodiment, the stator assembly further includes a wire cup, the rotating shaft is inserted into a cup cavity of the wire cup, one end of the wire cup is fixedly connected with the printed circuit board, and the other end of the wire cup abuts against the second end cover.

In one embodiment, the printed wiring board is soldered to the wire cup.

In one embodiment, the stator assembly further comprises an annular support fixedly attached to the printed wiring board for radially and axially limiting movement of the printed wiring board relative to the wire cup.

In one embodiment, the stator assembly further comprises an iron core, the iron core is of a hollow structure and is sleeved on the periphery of the wire cup, and the length of the iron core is equivalent to that of the wire cup.

In one embodiment, the rotor assembly further comprises magnetic steel, and the magnetic steel is sleeved on the periphery of the rotating shaft and penetrates through a cup cavity of the wire cup.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is a schematic overall structural diagram of an electric machine according to an embodiment of the present application;

fig. 2 is an exploded view of the overall structure of a motor according to an embodiment of the present disclosure.

Description of the reference numerals

10. A coreless brushless motor; 100. a rotor assembly; 110. a rotating shaft; 120. magnetic steel; 200. a stator assembly; 210. a printed wiring board; 220. a second end cap; 230. a second bearing; 240. a thread cup; 241. a cup cavity; 250. an annular support; 260. an iron core; 300. an adjustment assembly; 310. a Hall structure; 311. a Hall element; 312. a Hall plate; 320. a first end cap; 330. a first bearing; 400. a casing.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in fig. 1, the present application provides a coreless brushless motor 10 (hereinafter, simply referred to as motor 10) including a rotor assembly 100, a stator assembly 200, and an adjustment assembly 300. A Printed Circuit Board 210 (PCB) is provided in the stator assembly 200. A hall structure 310 is provided in the adjustment assembly 300. The hall structure 310 is provided separately from the printed wiring board 210, and can rotate with respect to the circumferential direction of the stator assembly 200.

Therefore, in the coreless brushless motor 10, the hall structure 310 and the printed circuit board 210 in the stator assembly 200 are separately arranged, so that the user can avoid the limitation of the printed circuit board 210 on the position of the hall structure 310 in the process of adjusting the hall structure 310, the problem of interference between the hall structure 310 and the printed circuit board 210 in the process of adjusting the hall structure 310 is solved, the convenience and the efficiency of adjusting the hall structure 310 are improved, and the operation reliability of the motor 10 is ensured.

It should be noted that, in the conventional coreless brushless motor 10, the hall structure 310 is connected to the printed circuit board 210, so that when the hall structure 310 is adjusted, the position of the printed circuit board 210 changes with the rotation of the hall structure 310. In addition, a large number of components such as wires exist between the hall structure 310 and the printed circuit board 210, so that in the process of adjusting the hall structure 310, the wires are easily driven to move around, the wires are rubbed with the components such as the housing of the motor 10, short circuit or open circuit occurs, and the motor 10 cannot normally operate.

In the present application, a gap is left between the hall structure 310 and the printed circuit board 210, and components having a certain mechanical connection function, such as wires, are not provided between the hall structure 310 and the printed circuit board 210, that is, the hall structure 310 and the printed circuit board 210 are separated from each other in a mechanical structure. Therefore, the position of the printed wiring board 210 does not change with the rotation of the hall structure 310 in the process of adjusting the rotation of the hall structure 310 with respect to the stator assembly 200.

Further, the motor 10 further includes a housing 400, and the housing 400 is disposed at the outer circumference of the rotor assembly 100, the stator assembly 200, and the adjusting assembly 300.

In one embodiment, as shown in fig. 1, the rotor assembly 100 further includes a rotating shaft 110. The adjustment assembly 300 also includes a first end cap 320 and a first bearing 330. The hall structure 310 is fixedly connected to the first end cap 320. The first end cap 320 is disposed around the first bearing 330. The first bearing 330 is rotatably coupled to the rotating shaft 110.

Therefore, a user can rotate the first end cap 320 to drive the hall structure 310 to rotate, so as to adjust the position of the hall structure 310, which is beneficial to improving the convenience of adjusting the hall structure 310.

It should be noted that the axis of rotation of the hall structure 310 may or may not coincide with the rotation shaft 110. The user can make corresponding adjustment according to actual needs.

It is understood that a plurality of anti-slip protrusions may be provided on the outer circumference of the first end cap 320, so that when the position of the first end cap 320 (i.e., the hall structure 310) is adjusted, the frictional resistance between the user and the first end cap 320 is increased, thereby facilitating the user's operation. Of course, the first end cap 320 may also be provided with an angle graduation mark, so that a user can observe the rotation angle of the first end cap 320 to improve the accuracy of adjusting the hall structure 310.

By arranging the first bearing 330 between the rotating shaft 110 and the first end cap 320, the rotating shaft 110 and the first end cap 320 can be prevented from being influenced by each other in the respective rotating process, that is, the rotating shaft 110 and the hall structure 310 are prevented from being influenced by each other in the rotating process, which is beneficial to improving the stability of the hall structure 310 and the first end cap 320 when the motor 10 works.

In addition, a user can adjust the hall structure 310 to a proper position by using a mechanical arm or directly and manually rotating the angle of the first end cover 320, and the operation process is convenient, efficient and reliable.

In one embodiment, as shown in FIG. 1, the Hall structure 310 includes a Hall plate 312 and at least one Hall element 311. The hall plate 312 has a through hole for the shaft 110 to pass through. At least two hall elements 311 are arranged on the hall plate 312 at intervals along the circumferential direction of the rotating shaft 110.

It can be seen that the positions of the plurality of hall elements 311 can be adjusted simultaneously by rotating the first end cap 320.

Specifically, in the present embodiment, three hall elements 311 are disposed on the hall plate 312, and the three hall elements 311 are disposed on the hall plate 312 at regular intervals along the circumferential direction of the rotating shaft 110, that is, the included angles between the three hall elements 311 on the hall plate 312 and the connecting lines of the rotating shaft 110 are 120 °. Of course, in other usage scenarios, any number of hall elements 311, such as four, five, six, etc., may be provided according to actual needs.

Further, in the present embodiment, the hall element 311 is welded to the hall plate 312 to fix the hall element 311 and the hall plate 312.

The hall plate 312 is screwed with the first end cap 320 to fix the hall plate 312 and the first end cap 320, so that when the first end cap 320 is rotated, the hall plate 312 and the hall element 311 fixedly connected with the hall plate 312 can rotate together with the first end cap 320, thereby achieving the effect of adjusting the hall structure 310.

It should be noted that a plurality of screwed points may be disposed between the hall plate 312 and the first end cap 320, so as to improve the stability of the connection between the hall plate 312 and the first end cap 320.

In one embodiment, as shown in fig. 1, stator assembly 200 also includes a second end cap 220 and a second bearing 230. The second end cap 220 is sleeved on the outer circumference of the second bearing 230. The second bearing 230 is rotatably connected to the rotating shaft 110 and is located on a side of the printed circuit board 210 facing away from the hall structure 310.

Therefore, the two ends of the rotating shaft 110 are respectively connected to the first end cap 320 through the first bearing 330 and the second end cap 220 through the second bearing 230, so as to limit the spatial position of the rotating shaft 110.

In one embodiment, as shown in fig. 1 and 2, the stator assembly 200 further includes a wire cup 240. The rotating shaft 110 is inserted into the cup cavity 241 of the thread cup 240. One end of the wire cup 240 is fixedly connected to the printed wiring board 210. The other end of the wire cup 240 abuts the second end cap 220. Therefore, both ends of the wire cup 240 are connected to the printed circuit board 210 and the second end cap 220, respectively, that is, the printed circuit board 210 is further disposed between the wire cup 240 and the hall structure 310. Since a gap is left between the printed wiring board 210 and the hall structure 310, the wire cup 240 does not interfere with the hall structure 310 during adjustment of the hall structure 310.

The fixed connection of the printed circuit board 210 and the wire cup 240 can be welding, pin joint, adhesion, clamping, etc. Specifically, in the present embodiment, the printed wiring board 210 is soldered to the wire cup 240.

In one embodiment, as shown in fig. 1, the stator assembly 200 further includes an annular bracket 250 fixedly coupled to the printed wiring board 210. The annular bracket 250 is used for radially and axially limiting the printed circuit board 210 to move relative to the wire cup 240, which is beneficial to further improving the stability of the connection between the printed circuit board 210 and the wire cup 240 and avoiding the influence on the operation reliability of the motor 10 caused by the falling of the printed circuit board 210 from the wire cup 240.

In one embodiment, as shown in fig. 1, the stator assembly 200 further includes a core 260. The iron core 260 has a hollow structure and is sleeved around the wire cup 240. The length of the core 260 corresponds to the length of the wire cup 240. The rotor assembly 100 also includes magnetic steel 120. The magnetic steel 120 is sleeved on the periphery of the rotating shaft 110 and penetrates through the cup cavity 241 of the wire cup 240. As can be seen, the motor 10 of the present application includes, in order from inside to outside, a rotating shaft 110, a magnetic steel 120, a wire cup 240, an iron core 260, and a casing 400. That is, the respective elements are formed as an integral structure with the casing 400 and are accommodated in the casing 400.

It should be noted that the first end cap 320 should partially extend out of the casing 400 in the axial direction, so as to leave a holding position for a user to hold to adjust the first end cap 320 (i.e., the hall structure 310).

Further, in one embodiment, the core 260 may be a hollow structure and may be a cylinder. The wire cup 240 may have a hollow structure and may have a cylindrical shape. The core 260 may be disposed around the periphery of the wire cup 240. It may comprise a plurality of annularly shaped lamellar bodies arranged one above the other. The plurality of sheet-shaped main bodies can be circular silicon steel sheets and can form a columnar body through riveting. The core 260 may have an outer diameter corresponding to an inner diameter of the casing 400 and an inner diameter corresponding to an outer diameter of the wire cup 240. The length of the core 260 may be equivalent to the length of the wire cup 240, and the end surface of the core 260 may be flush with the end surface of the wire cup 240.

It should be noted that, in the conventional cup-in-cup motor with a winding structure, the entire printed circuit board 210 and the bracket (i.e., the ring-shaped bracket 250 in this application) thereof are fixed above the iron core 260, so that the hall structure 310 and the printed circuit board 210 are integrally disposed, which brings inconvenience to the adjustment of the hall structure 310.

In the coreless brushless motor 10, the hall structure 310 and the printed circuit board 210 are respectively and independently arranged, and the printed circuit board 210 and the wire cup 240 are welded and fixed, so that the problem that the wire cup 240 and the rotor rub and collide when the hall is adjusted can be solved, and the motor 10 is ensured to run reliably. In addition, pass through the screw fastening with hall structure 310 and first end cover 320, can adjust hall structure 310's angle through the position of adjusting first end cover 320, can solve the limited problem of hall structure 310 control range, improve hall structure 310 and adjust efficiency, can avoid the problem that traditional structure medium voltage cup 240 wire winding is fragile simultaneously, make hall structure 310's regulation more convenient, high-efficient, reliable.

It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

It should be readily understood that "on … …", "above … …" and "above … …" in this disclosure should be interpreted in the broadest manner such that "on … …" means not only "directly on something", but also "on something" with intermediate features or layers therebetween, and "above … …" or "above … …" includes not only the meaning of "above" or "above" something, but also the meaning of "above" or "above" without intermediate features or layers therebetween (i.e., directly on something).

Furthermore, spatially relative terms, such as "below," "lower," "above," "upper," and the like, may be used herein for ease of description to describe one element or feature's illustrated relationship to another element or feature. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may have other orientations (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly as well.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A coreless brushless motor, comprising:

a rotor assembly;

a stator assembly comprising a printed wiring board;

the adjusting assembly comprises a Hall structure, the Hall structure and the printed circuit board are arranged separately, and the Hall structure can rotate along the circumferential direction of the stator assembly.

2. The coreless brushless motor of claim 1, wherein the rotor assembly further includes a rotating shaft, the adjustment assembly further includes a first end cap and a first bearing, the hall structure is fixedly connected to the first end cap, the first end cap is sleeved on an outer circumference of the first bearing, and the first bearing is rotatably connected to the rotating shaft.

3. The coreless brushless motor of claim 2, wherein the hall structure includes a hall plate and at least two hall elements, the hall plate is provided with a through hole through which the rotating shaft passes, and the at least two hall elements are arranged on the hall plate at intervals along a circumferential direction of the rotating shaft.

4. The coreless brushless motor of claim 3, wherein the Hall element is welded to the Hall plate; and/or the Hall plate is in threaded connection with the first end cover.

5. The coreless, brushless electric motor of claim 2, wherein the stator assembly further includes a second end cap and a second bearing, the second end cap is sleeved on an outer circumference of the second bearing, and the second bearing is rotatably connected to the rotating shaft and located on a side of the printed circuit board facing away from the hall structure.

6. The coreless brushless motor of claim 5, wherein the stator assembly further includes a wire cup, the rotating shaft is disposed through a cup cavity of the wire cup, one end of the wire cup is fixedly connected to the printed circuit board, and the other end of the wire cup abuts against the second end cap.

7. The coreless, brushless motor of claim 6, wherein the printed circuit board is soldered to the wire cup.

8. The coreless, brushless motor of claim 6, wherein the stator assembly further includes an annular support fixedly coupled to the printed wiring board, the annular support configured to radially and axially restrain the printed wiring board from moving relative to the wire cup.

9. The coreless brushless motor of claim 6, wherein the stator assembly further includes an iron core, the iron core is a hollow structure and is sleeved on an outer circumference of the wire cup, and a length of the iron core is equivalent to a length of the wire cup.

10. The coreless, brushless motor of claim 6, wherein the rotor assembly further comprises magnetic steel, and the magnetic steel is sleeved on the periphery of the rotating shaft and penetrates through the cup cavity of the wire cup.

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