Magnetic shielding assembly and motor

Abstract

The utility model relates to the field of motors, in particular to a magnetic shielding assembly for a motor and a motor comprising the magnetic shielding assembly, which are characterized in that the magnetic shielding assembly comprises a first circuit board provided with a winding for driving a magnet to rotate; the magnetic shielding piece is made of a magnetic shielding material, the magnetic shielding piece comprises a side wall and a bottom plate, the side wall and the bottom plate form a first containing space, and the first circuit board is located in the first containing space. The magnetic shielding assembly can be used for a motor, no magnetic isolation material is arranged between the first circuit board and the magnet, the magnet can be effectively driven to rotate, and meanwhile the winding on the first circuit board is effectively prevented from influencing a driving (and / or reading) circuit of the magnetic shielding assembly. The magnetic shielding assembly also enables the first circuit board provided with the winding to be effectively combined with the magnetic shielding shell of the motor.

Description

Technical Field

[0001] The utility model relates to the field of motor equipment, in particular to a magnetic shielding component for a motor and a motor comprising the magnetic shielding component. Background Art

[0002] Many precision stepper motors or servo motors require positioners, pedometers and other devices to identify and manage their operating positions. This makes the motor's peripheral circuits and structures complex, increases the corresponding footprint, and easily causes problems such as lost steps and inaccurate step counting, resulting in errors.

[0003] If a circuit board is set in the motor and a corresponding induction coil is arranged on the circuit board, the position and number of steps of the motor can be read more accurately by obtaining the induced electromotive force induced by the coil. Of course, if one or more coils can be set on a circuit board so that the circuit board has the functions of inducing electromotive force, reading the induced electromotive force and driving the motor at the same time, it can not only reduce costs, improve performance, and reduce the occupied volume, but also facilitate subsequent use.

[0004] In the above motor, a reading and driving circuit is still required to read and / or drive the coil on the circuit board. The reading and driving circuit needs to be connected to the circuit board on one hand and to other devices and circuits in the motor on the other hand. However, the magnetic field generated by the rotating magnet in the motor and the magnetic field generated by the coil on the circuit board will have a negative impact on the operation of the reading and driving circuit, and then affect the operation of the motor.

[0005] Therefore, it is hoped to propose a technical solution that can at least solve the above technical problems. Utility Model Content

[0006] In response to the above problems, according to the first aspect of the utility model, a magnetic shielding assembly for a motor is proposed, characterized in that it includes: a first circuit board, on which a winding for driving a magnet to rotate is provided; a magnetic shielding component, which is made of a magnetic shielding material, and includes side walls and a bottom plate, and the side walls and the bottom plate form a first accommodating space, wherein the first circuit board is located in the first accommodating space.

[0007] The magnetic shielding assembly of the utility model can be used for a motor, which effectively prevents the winding on the first circuit board from affecting its driving (and / or reading) circuit, and enables the first circuit board provided with the winding to be effectively combined with the magnetic shielding shell of the motor. Among them, the first circuit board in the magnetic shielding assembly can be directly arranged near the magnet, and no magnetic isolation material (such as iron, silicon steel, etc. that can be attracted by magnets) is arranged between the first circuit board and the magnet, so that the magnet can be effectively driven to rotate. In addition, by arranging a magnetic shielding member made of magnetic shielding material, the first circuit board can be effectively isolated from the driving (and / or reading) circuit, which meets the requirements of the motor's own magnetic circuit closure and the motor's EMC and EMI requirements. At the same time, the driving (and / or reading) circuit for the aforementioned first circuit board can be connected to other devices or circuits in the motor, and is arranged outside the base relative to the magnet, so that it is not affected by the magnetic field generated by the winding on the first circuit board.

[0008] The magnetic shielding assembly according to the present invention may have one or more of the following features.

[0009] According to one embodiment, preferably, the magnetic shielding member is made of a material including nickel, iron, zinc or a material including manganese, iron, zinc, and then sintered, or the material of the magnetic shielding member also includes resin and is formed by plastic injection molding. The magnetic shielding assembly according to this embodiment has a further improved magnetic shielding effect.

[0010] According to one embodiment, preferably, the side wall and the bottom plate are integrally formed, or the side wall and the bottom plate are independent components assembled with each other.

[0011] According to one embodiment, preferably, the magnetic shielding assembly further comprises a second circuit board, wherein the first circuit board, the bottom plate and the second circuit board are stacked in sequence. According to this embodiment, the magnetic shielding assembly has a compact structure, and the circuit on the second circuit board can obtain improved magnetic shielding.

[0012] According to one embodiment, preferably, a plurality of first through holes are provided on the bottom plate, and the first circuit board and the second circuit board are electrically connected via the first through holes. In the magnetic shielding assembly according to this embodiment, the electrical connection between the first circuit board and the second circuit board can be flexibly set according to requirements, and the second circuit board can still obtain good magnetic shielding.

[0013] According to one embodiment, preferably, at least one metal connector is attached to the side of the first circuit board facing the bottom plate, each of the at least one metal connector is received in a corresponding first through hole, and the second circuit board and the first circuit board are welded by a conductive welding material, and the conductive welding material at least partially surrounds the metal connector in the first through hole. In the magnetic shielding assembly according to this embodiment, the electrical connection between the first circuit board and the second circuit board is further improved.

[0014] According to one embodiment, preferably, the bottom plate is made of magnetic shielding material, and the bottom plate and the first circuit board and the second circuit board are stacked and glued to form an integrated circuit board. In the magnetic shielding assembly according to this embodiment, the first circuit board, the second circuit board and the bottom plate are formed as one body, thereby producing a good magnetic shielding effect, and the production process of the magnetic shielding assembly is improved.

[0015] According to one embodiment, preferably, a corresponding second through hole is provided on the second circuit board at a position corresponding to the at least one first through hole. In the magnetic shielding assembly according to this embodiment, the conductive soldering material filled in the first through hole can be applied through the second through hole, thereby improving the production process of the magnetic shielding assembly.

[0016] According to one embodiment, preferably, the diameter of the second through hole is smaller than the diameter of the first through hole. In the magnetic shielding assembly according to this embodiment, the conductive soldering material filled in the first through hole can be applied through the second through hole, and the production process of the magnetic shielding assembly is further improved.

[0017] According to one embodiment, preferably, the side wall and the bottom plate of the magnetic shielding member further form a second accommodating space, the second accommodating space is arranged at a surface of the bottom plate opposite to the first accommodating space, and the second circuit board is located in the second accommodating space. According to the magnetic shielding assembly of this embodiment, the second circuit board and the magnetic shielding member form a further compact assembly, thereby being able to further reduce the size of the motor.

[0018] According to one embodiment, preferably, the magnetic shielding assembly further comprises a metal cover, the metal cover is snap-connected to the magnetic shielding member and covers the first accommodation space, and the magnet is arranged in the first accommodation space. The magnetic shielding assembly according to this embodiment forms a motor housing with a compact overall structure and a small size.

[0019] According to one embodiment, preferably, the magnetic shielding assembly further comprises a magnetic conductive metal support, which is fixed to the magnet on a side of the magnet opposite to the bottom plate for magnetic shielding. In the magnetic shielding assembly according to this embodiment, the magnetic conductive metal support provides magnetic shielding on a side of the magnet opposite to the bottom plate, thereby further improving the magnetic shielding effect of the magnetic shielding assembly.

[0020] According to one embodiment, preferably, the first circuit board and the second circuit board have foolproof features associated with the magnetic shielding member. The magnetic shielding assembly according to this embodiment prevents assemblers from making mistakes during assembly, thereby improving the production process.

[0021] According to a second aspect of the utility model, a motor is provided, which comprises the magnetic shielding assembly as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention are briefly introduced below. The drawings are only used to show some embodiments of the present invention, but not to limit all embodiments of the present invention thereto.

[0023] Figure 1 is a perspective view of a motor including a magnetic shield assembly according to the present invention.

[0024] Figure 2A and Figure 2B 1 is an exploded view of a motor including a magnetic shielding assembly according to the present utility model, and shows magnetic shielding assemblies according to two embodiments respectively.

[0025] Figure 3A and Figure 3B Two implementations of the first circuit board are shown respectively.

[0026] Figure 4A and Figure 4B Perspective and cross-sectional views of the magnet assembly, respectively.

[0027] Figure 5A is an exploded view of a magnetic shielding assembly according to an embodiment of the utility model, Figure 5B is a perspective view of the magnetic shielding assembly, which does not show the second circuit board, Figure 5C is a perspective view of the magnetic shield assembly showing a second circuit board, Figure 5D is an exploded view of a magnetic shield assembly according to another embodiment.

[0028] Fig. 6A is another perspective view of the magnetic shield assembly. Figure 6B is a perspective view of the metal cover.

[0029] Fig. 7A The magnet assembly is shown to be installed in the first accommodation space of the magnetic shielding assembly. Figure 7B A perspective view showing the snap connection of the metal cover to the magnetic shield.

[0030] Figure 8 A partially exploded view of an electric machine including a magnetic shield assembly according to the present invention is shown.

[0031] Fig.9A and Fig. 9B The cross-sectional view of the motor according to the utility model during operation is shown. Fig.9A and Fig. 9B In the example, the moving parts of the motor are in different positions.

[0032] Reference numerals list

[0033] 1 Motor

[0034] 10 Magnetic Shielding Assembly

[0035] 20 Magnet assembly

[0036] 21. Magnetic metal support

[0037] 22 Shaft

[0038] 23 Rotating shaft core

[0039] 24 Molding Department

[0040] 28 threaded holes

[0041] 30 Moving Parts

[0042] 31 Moving part body

[0043] 32 threaded stud

[0044] 33 Guide column

[0045] 50 Magnets

[0046] 100 First Circuit Board

[0047] 110 Metal connectors

[0048] 130A Winding

[0049] 130B Winding

[0050] 140 Foolproofing feature

[0051] 200 Second circuit board

[0052] 260 Second through hole

[0053] 300 Magnetic Shielding

[0054] 301 First Accommodation Space

[0055] 302 Second storage space

[0056] 310 Sidewall

[0057] 330 Guide hole

[0058] 350 Base Plate

[0059] 360 First through hole

[0060] 400 Metal Cover

[0061] A Rotation axis DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the technical solution of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described in combination with the drawings of the specific embodiments of the utility model. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0063] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the specification and claims of the utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate quantity restrictions. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" do not limit direct connections, but may include indirect connections. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0064] The present invention will be described in detail below by describing exemplary embodiments.

[0065] Figure 1 An electric machine 1 including a magnetic shield assembly 10 according to the present invention is shown. Figure 11 shows the assembled motor 1 and the moving part 30 installed together with the magnetic shielding assembly 10. The motor 1 is flat in shape as a whole.

[0066] Figure 2A 1 shows an exploded view of the motor 1. Figure 2A As shown, the motor 1 includes a magnet assembly 20, a moving part 30, a first circuit board 100, a second circuit board 200, a magnetic shield 300 and a metal cover 400. The first circuit board 100 is provided with a winding (see, for example, Figure 3A and Figure 3B ), which is used to drive the rotation of the magnet 50 of the magnet assembly 20, and then output power from the motor 1. Other windings can also be arranged on the first circuit board 100. When the magnet 50 rotates, these other windings are affected by the magnet 50 to generate induced electromotive force, thereby sensing the rotation position of the magnet 50. Alternatively, the same winding on the first circuit board 100 can be used to drive the magnet 50 to rotate and sense the rotation position of the magnet 50. On the other hand, a driving circuit for controlling the operation of the winding on the first circuit board 100 (driving the magnet 50 to rotate and / or sensing the rotation position of the magnet 50) is arranged on the second circuit board 200.

[0067] like Figure 2A As shown, the magnetic shielding component 300 includes a side wall 310 and a bottom plate 350. The side wall 310 is circumferentially arranged around the periphery of the bottom plate 350, so that the side wall 310 and the bottom plate 350 form a first accommodating space 301. The magnetic shielding component 300 is made of a magnetic shielding material. For example, the magnetic shielding component 300 is made of a material including nickel, iron, zinc or a material including manganese, iron, zinc, and then sintered after molding. Alternatively, the material of the magnetic shielding component 300 may also include a resin, so that the magnetic shielding component 300 can be molded by plastic injection molding. In other words, such a magnetic shielding component 300 is made of a resin mixed with a magnetic shielding component, such as the above-mentioned nickel, iron, zinc or manganese, iron, zinc, etc.

[0068] According to the utility model, the first circuit board 100 is located in the first accommodating space 301, and the magnetic shielding member 300 isolates the first circuit board 100 from the outside of the first accommodating space 301, so as to prevent the magnetic field generated by the first circuit board 100 from affecting the outside of the first accommodating space 301, thereby achieving the effect of magnetic shielding. In addition, the magnet assembly 20 is also arranged in the first accommodating space 301, that is, the magnet 50 of the magnet assembly 20 is also arranged in the first accommodating space 301. Therefore, the magnetic shielding member 300 isolates the magnet 50 from the outside of the first accommodating space 301, thereby achieving the effect of magnetic shielding.

[0069] like Figure 2A As shown, the side wall 310 and the bottom plate 350 may be integrally formed. Figure 2BAs shown, the side wall 310 and the bottom plate 350 can be independent components, which are assembled together during the manufacturing process of the motor 1. At this time, the magnetic shielding member 300 can still achieve the effect of magnetic shielding.

[0070] Figure 3A and Figure 3B Two embodiments of the first circuit board 100 are shown respectively. Figure 3A and Figure 3B In the embodiment, the first circuit board 100 is provided with a first winding 130A and a second winding 130B having different wiring patterns. The first winding 130A and the second winding 130B can both drive the magnet 50 to rotate. According to the present invention, the winding can be arranged on the surface of the first circuit board 100 facing the magnet 50.

[0071] Figure 4A and Figure 4B A perspective view and a cross-sectional view of the magnet assembly 20 are shown respectively. Figure 4A and Figure 4B As shown, the magnet assembly 20 includes a magnet 50, a magnetic conductive metal support 21 and a rotating shaft 22. The magnet 50 is in the shape of a flat ring and has a through hole running through its thickness at the center. As mentioned above, the magnet 50 is configured to rotate when driven by the winding. The magnetic conductive metal support 21 is made of a metal that can conduct magnetism and is formed in a disc shape, which is fixed to one side of the magnet 50 to magnetically shield the magnet 50. The magnetic conductive metal support 21 also has a through hole running through it at its center. The rotating shaft 22 is formed in the central through hole of the magnet 50 and the central through hole of the magnetic conductive metal support 21, and is fixed relative to the magnet 50 and the magnetic conductive metal support 21. According to an embodiment of the utility model, the rotating shaft 22 is fixed to the radial inner edge of the central through hole of the magnetic conductive metal support 21. Therefore, the magnet 50, the magnetic conductive metal support 21 and the rotating shaft 22 rotate together when the magnet 50 is driven by the winding.

[0072] like Figure 4A and Figure 4B Specifically, a threaded hole 28 is provided at the center of the rotating shaft 22 for driving the movement of the moving part 30, as described in detail later. The rotating shaft 22 can be composed of a rotating shaft core 23 and a molded part 24, the threaded hole 28 is manufactured in the rotating shaft core 23, and the molded part 24 is molded between the radial outer side of the rotating shaft core 23 and the radial inner side of the central through hole of the magnetic conductive metal support 21, so as to fix the rotating shaft core 23 and the magnetic conductive metal support 21 to each other.

[0073] Figure 5A1 shows an exploded view of the magnetic shielding assembly 10. According to an embodiment of the utility model, the magnetic shielding assembly 10 includes a first circuit board 100, a magnetic shielding member 300, and may also include a second circuit board 200. The magnetic shielding member 300 includes a side wall 310 and a bottom plate 350. In the assembled magnetic shielding assembly 10, the first circuit board 100, the bottom plate 350 and the second circuit board 200 are stacked in sequence.

[0074] like Figure 5A Specifically, a plurality of first through holes 360 are provided on the bottom plate 350. At least one metal connector 110 is provided on the side of the first circuit board 100 facing the bottom plate 350. For example, at least one metal connector 110 is attached to the side of the first circuit board 100 facing the bottom plate 350. In addition, a plurality of second through holes 260 are provided on the second circuit board 200. The position of the metal connector 110 of the first circuit board 100 corresponds to the position of the first through hole 360 ​​of the bottom plate 350, and the position of the second through hole 260 of the second circuit board 200 corresponds to the position of the first through hole 360 ​​of the bottom plate 350.

[0075] refer to Figure 5B , which shows the first circuit board 100 and the base plate 350 stacked on each other. Figure 5B As shown, each of the metal connectors 110 of the first circuit board 100 is received in a corresponding one of the first through holes 360 . Figure 5B The second accommodating space 302 formed by the side wall 310 and the bottom plate 350 is also shown. The second accommodating space 302 is arranged on the surface of the bottom plate 350 opposite to the first accommodating space 301, and is used to receive the second circuit board 200. Figure 5C As shown. In other words, the second circuit board 200 is configured to be located in the second accommodating space 302, and the second circuit board 200 and the first circuit board 100 are welded by a conductive welding material. The conductive welding material can be applied to each of the first through holes 360 and at least partially surround the metal connector 110. For example, the conductive welding material can fill the entire space around the metal connector 110 in the first through hole 360. Therefore, the electrical connection between the first circuit board 100 and the second circuit board 200 can be achieved via each of the first through holes 360, so that, for example, the driving circuit arranged on the second circuit board 200 can drive the winding on the first circuit board 100 to work. At the same time, the second circuit board 200 and the circuit components arranged in the space outside the first accommodating space 301 are avoided from being affected by the magnetic field in the first accommodating space 301.

[0076] As described above, the winding on the first circuit board 100 can be arranged on the surface of the first circuit board 100 facing the magnet 50, that is, the surface facing away from the bottom plate 350. Therefore, the wire end of the winding can pass through the thickness of the first circuit board 100 to reach the bottom plate 350, and then pass through the bottom plate 350 to be electrically connected to the second circuit board 200. In addition, multiple layers of windings can also be arranged in the first circuit board 100 as needed.

[0077] According to an embodiment of the utility model, the first circuit board 100, the bottom plate 350 and the second circuit board 200 can be fixed to each other by other means, so that the first through hole 360 ​​and the related metal connector 110, the conductive welding material, the second through hole 260 and the like partially assume the electrical connection function, and only assume a small mechanical fixing function, or almost no mechanical fixing function. As a result, the fixation between the first circuit board 100, the bottom plate 350 and the second circuit board 200 is more secure, and the electrical connection is more stable. For example, the bottom plate 350 can be a hard board, which is cold-glued and bonded to the first circuit board 100 and the second circuit board 200. Alternatively, the bottom plate 350 can be a hot melt board, and the first circuit board 100 and the second circuit board 200 are fixed to each other by hot pressing and gluing.

[0078] Figure 5C The second circuit board 200 and the second through hole 260 thereof which have been arranged in the second accommodating space 302 are shown. During the manufacturing process of the magnetic shielding assembly 10, the second through hole 260 can be used to fill the first through hole 260 with conductive soldering material from the outside when the second circuit board 200 has been placed in the second accommodating space 302. To this end, for example, the diameter of the second through hole 260 can be smaller than the diameter of the first through hole 360 ​​to improve the filling effect of the conductive soldering material while saving the conductive soldering material.

[0079] Figure 5D FIG. 1 shows a magnetic shielding assembly 10 according to another embodiment of the present invention. Figure 5D As shown, the side wall 310 and the bottom plate 350 are independent components. During the manufacturing process of the magnetic shielding assembly 10, the first circuit board 100, the bottom plate 350 and the second circuit board 200 are stacked and glued to form an integrated circuit board, and then assembled with the side wall 310. Since the bottom plate 350 is made of magnetic shielding material, the integrated circuit board itself becomes a separate component with good magnetic shielding performance. In this embodiment, the first circuit board 100, the bottom plate 350 and the second circuit board 200 can also be fixed to each other in the above-mentioned manner.

[0080] In addition, refer to Figure 5A and Figure 5DThe first circuit board 100 is provided with a foolproof feature 140 associated with the magnetic shield 300 to prevent the assembler from mis-installing the first circuit board 100 into the first accommodation space 301 of the magnetic shield 300 (for example, placing the first circuit board 100 upside down in the first accommodation space 301). Specifically, the first circuit board 100 can be designed to have an asymmetric planar shape and thus have the foolproof feature 140 (see Figure 5A In addition, the second circuit board 100 may also be provided with a foolproof feature associated with the magnetic shield 300 , and the magnetic shield 300 may also be provided with a corresponding foolproof feature.

[0081] refer to Fig. 6A , 6B , 7A, 7B, illustrate the assembly process of the motor 1 including the magnetic shielding assembly 10. Fig. 6A As shown, the first circuit board 100 has been installed in the first accommodation space 301 of the magnetic shield 300, and on the other hand, the second circuit board 200 has been installed in the second accommodation space 302 of the magnetic shield 300. According to an embodiment of the utility model, a through hole is provided at the center of the first circuit board 100, the bottom plate 350 and the second circuit board 200 to receive one end of the rotating shaft 22 of the magnet assembly 20. Figure 6B The metal cover 400 is shown, and the magnetic shielding assembly 10 may further include the metal cover 400. The metal cover 400 is configured to be snap-connected with the magnetic shielding member 300 and cover the first accommodating space 301, so that the metal cover 400 and the magnetic shielding member 300 can jointly surround the first circuit board 100 and the magnet 50, achieving a better shielding effect.

[0082] like Fig. 7A As shown, during the assembly of the motor 1 , the magnet assembly 20 is placed in the first accommodating space 301 and occupies a larger portion of the first accommodating space 301 . Figure 7B The figure shows a perspective view of the metal cover 400 after it has been snap-fitted to the magnetic shield 300. The metal cover 400 is provided with a through hole at the center to receive the other end of the rotating shaft 22 of the magnet assembly 20 and expose the threaded hole 28 provided in the rotating shaft 22. It can be seen that the motor 1 can have a flat and compact structure.

[0083] Figure 8 Schematic diagram of the installation of the moving part 30 to other parts assembled with each other to form the motor 1. Figure 8As shown, the moving component 30 has a plate-shaped moving component body 31, a threaded column 32 extending from the center of the moving component body 31, and a plurality of guide columns 33 located near the edge of the moving component body 31. The threaded column 32 is configured to be at least partially received in the threaded hole 28 and to form a threaded fit with the threaded hole 28. Each guide column 33 is configured to be at least partially received in a plurality of guide holes 330 of the side wall 310. Figure 8 As shown, each guide hole 330 is arranged in the beveled portion of the side wall 310, so that the entire side wall 310 has a more solid structure.

[0084] Fig.9A and 9B Two cross-sectional views of the motor 1 during operation are shown, wherein the moving part 30 moves to different positions relative to other parts of the motor 1. When the motor 1 is operating, for example, the driving circuit located on the second circuit board 200 drives the winding located on the first circuit board 110 through the first through hole 350, thereby driving the magnet 50 to rotate, that is, driving the entire magnet assembly 20 to rotate. In addition, on the one hand, the movement of the magnet assembly 20 along the direction of the rotation axis A is blocked (for example, blocked by the metal cover 400 and the bottom plate 350), and on the other hand, the moving part 30 can only move along the direction of the rotation axis A due to the cooperation between the guide column 33 and the guide hole 330. Therefore, the threaded cooperation between the threaded column 33 of the moving part 30 and the threaded hole 28 of the magnet assembly 20 causes the moving part 30 to be driven to move along the direction of the rotation axis A, so that the motor 1 outputs the translational motion of the moving part 30.

[0085] Fig.9A and Fig. 9B It is further shown that the first circuit board 100, the bottom plate 350 and the second circuit board 200 are stacked on each other, and the metal cover 400 and the magnetic shield 300 are assembled with each other to surround the first accommodation space 301. Therefore, Fig.9A and Fig. 9B The magnetic shielding assembly 10 shown can provide an improved magnetic shielding function for the circuits and devices outside the first accommodating space 301 .

[0086] The exemplary implementation schemes of the magnetic shielding assembly and the motor proposed in the present invention are described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present invention, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention can be combined in various ways without exceeding the protection scope of the present invention.

Claims

1. A magnetic shielding assembly for a motor, characterized in that: include: A first circuit board (100), wherein the first circuit board (100) is provided with windings (130A, 130B) for driving the magnet (50) to rotate; A magnetic shielding member (300), wherein the magnetic shielding member (300) is made of a magnetic shielding material, and comprises a side wall (310) and a bottom plate (350), wherein the side wall (310) and the bottom plate (350) form a first accommodating space (301), Wherein, the first circuit board (100) is located in the first accommodating space (301).

2. The magnetic shielding assembly according to claim 1, characterized in that: The side wall (310) and the bottom plate (350) are integrally formed, or The side wall (310) and the bottom plate (350) are independent components assembled with each other.

3. The magnetic shielding assembly according to claim 1, characterized in that: The magnetic shielding assembly further comprises a second circuit board (200), wherein the first circuit board (100), the bottom plate (350) and the second circuit board (200) are stacked in sequence.

4. The magnetic shielding assembly according to claim 3, characterized in that: A plurality of first through holes (360) are provided on the bottom plate (350), and the first circuit board (100) and the second circuit board (200) are electrically connected via the first through holes (360).

5. The magnetic shielding assembly according to claim 4, characterized in that: At least one metal connector (110) is attached to the side surface of the first circuit board (100) facing the base plate (350), and each of the at least one metal connector (110) is received in a corresponding first through hole (360). The second circuit board (200) and the first circuit board (100) are welded by a conductive welding material, and the conductive welding material at least partially surrounds the metal connector (110) in the first through hole (360).

6. The magnetic shielding assembly according to claim 3, characterized in that: The bottom plate (350) is made of magnetic shielding material, and the bottom plate (350), the first circuit board (100) and the second circuit board (200) are stacked and glued together to form an integrated circuit board.

7. The magnetic shielding assembly according to claim 4, characterized in that: Corresponding second through holes (260) are arranged on the second circuit board (200) at positions corresponding to the plurality of first through holes (360).

8. The magnetic shield assembly according to claim 7, characterized in that: The diameter of the second through hole (260) is smaller than the diameter of the first through hole (360).

9. The magnetic shield assembly according to any one of claims 3 to 8, characterized in that: The side wall (310) and the bottom plate (350) of the magnetic shielding component also form a second accommodating space (302), the second accommodating space (302) being arranged on a surface of the bottom plate (350) opposite to the first accommodating space (301), and the second circuit board (200) being located in the second accommodating space (302).

10. The magnetic shield assembly according to claim 9, characterized in that: The magnetic shielding assembly further comprises a metal cover (400), the metal cover (400) and the magnetic shielding member (300) are snap-connected and cover the first accommodating space (301), and the magnet (50) is arranged in the first accommodating space (301).

11. The magnetic shield assembly according to claim 9, characterized in that: A magnetic conductive metal support member (21) is fixed to the magnet (50) at a side of the magnet (50) opposite to the bottom plate (350) to perform magnetic shielding.

12. The magnetic shield assembly according to claim 9, characterized in that: The first circuit board (100) and the second circuit board (200) have foolproof features associated with the magnetic shield (300).

13. A motor, characterized in that: The invention comprises the magnetic shielding assembly according to any one of claims 1 to 12.

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