Motor

Abstract

The present application relates to the technical field of motors, and provides a motor, comprising a plurality of magnetic steels circumferentially arranged around a rotating shaft, wherein the magnetic polarities of the ends of every two adjacent magnetic steels close to the rotating shaft are opposite, and the magnetic polarities of the other ends of the two adjacent magnetic steels are opposite; the magnetic steels are sintered magnetic steels. In this way, forming the plurality of sintered magnetic steels separately and then assembling the sintered magnetic steels together can improve the performance of a magnetic circuit, simplify the assembly process, and satisfy the assembly requirements on motors of different sizes, thereby enhancing stability and reliability, and improving the driving performance of motors. Therefore, the technical effect of improving the driving performance of motors is achieved.

Description

A motor Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a motor. Background Art

[0002] A motor is an electromagnetic device that converts or transmits electrical energy, primarily consisting of a stator and a rotor. A stepper motor, a special type of motor used for control, converts electrical pulses into corresponding angular or linear displacements.

[0003] Conventional motor magnets typically use a bonded magnet structure, where the coil is wound around a bobbin and then assembled with claw poles. However, this bonded magnet structure suffers from poor magnetic circuit performance, stability, and reliability, hindering motor drive performance.

[0004] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Technical issues

[0005] The purpose of this application is to provide a motor that can solve the problem in the prior art that is not conducive to improving the driving performance of the motor. Technical Solutions

[0006] The technical solution of the present application is as follows: A motor is provided, comprising: a plurality of magnets arranged circumferentially around a rotating shaft, wherein the magnetic properties of two adjacent magnets close to one end of the rotating shaft are opposite, and the magnetic properties of the other ends of two adjacent magnets are opposite, and the magnets are sintered magnets.

[0007] Optionally, the motor also includes: a first claw pole, a second claw pole and a first plastic part arranged outside the rotating shaft, the first plastic part includes a plurality of first limiting grooves arranged at intervals and a second limiting groove arranged between two adjacent first limiting grooves; the first claw pole includes a first claw plate and a plurality of first claw fingers connected to the first claw plate, the first claw fingers are embedded in the corresponding first limiting grooves; the second claw pole includes a second claw plate and a plurality of second claw fingers connected to the second claw plate, the second claw fingers are embedded in the corresponding second limiting grooves, and the second claw fingers are arranged between two adjacent first claw fingers.

[0008] Optionally, the first plastic part includes a first limiting portion and a second limiting portion arranged opposite to each other, and a shell respectively connecting the first limiting portion and the second limiting portion, and a plurality of supporting members are arranged between the first limiting portion and the second limiting portion, two adjacent supporting members and the first limiting portion enclose the first limiting groove, and two adjacent supporting members and the second limiting portion enclose the second limiting groove.

[0009] Optionally, the first limiting portion, the support member and the shell are enclosed to form a first through groove for the first claw finger to pass through, and the first through groove and the first limiting groove are communicated; the second limiting portion, the support member and the shell are enclosed to form a second through groove for the second claw finger to pass through, and the second through groove and the second limiting groove are communicated.

[0010] Optionally, the shell includes a main body and two extensions respectively connected to the main body, the main body is respectively connected to the first limiting portion and the second limiting portion, and the main body and the two extensions enclose a mounting groove for placing the coil.

[0011] Optionally, the first claw finger is tapered in a direction approaching the second claw disk, the second claw finger is tapered in a direction approaching the first claw disk, and the first claw pole and the second claw pole are respectively integrally injection molded.

[0012] Optionally, the motor further includes: a third claw pole, a fourth claw pole and a second plastic part arranged outside the rotating shaft, the third claw pole includes a third claw disk and a plurality of third claw fingers connected to the third claw disk, and the plurality of third claw fingers extend into the second plastic part, the fourth claw pole includes a cover body and a plurality of fourth claw fingers connected to the cover body, the cover body is located outside the second plastic part, the plurality of fourth claw fingers extend into the second plastic part, and the fourth claw fingers are located between two adjacent third claw fingers.

[0013] Optionally, the motor further includes: an adhesive layer provided between two adjacent magnetic steels.

[0014] Optionally, the motor further includes: a coating provided on the other end of the magnetic steel.

[0015] Optionally, the magnetic energy product of the magnetic steel is greater than 26MGOe, and the intrinsic coercive force of the magnetic steel is greater than 11KOe. Beneficial effects

[0016] The beneficial effects of the present application are as follows: The present application provides a motor in which, through the circumferential arrangement of multiple magnets around a rotating shaft, the magnetic properties of two adjacent magnets near one end of the rotating shaft are opposite, and the magnetic properties of the other ends of two adjacent magnets are opposite, and the magnets are sintered magnets. By separately forming multiple sintered magnets and then splicing them together, the magnetic circuit performance can be improved, while simplifying the assembly process, meeting the assembly requirements of motors of different sizes, and improving stability and reliability, which is conducive to improving the driving performance of the motor. This achieves the technical effect of improving the driving performance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic diagram of the structure of a magnetic steel in a motor provided in an embodiment of the present application;

[0018] FIG2 is a schematic structural diagram of an adhesive layer in a motor provided in an embodiment of the present application;

[0019] FIG3 is an exploded schematic diagram of a motor provided in an embodiment of the present application;

[0020] FIG4 is a schematic structural diagram of a motor provided in an embodiment of the present application;

[0021] FIG5 is a cross-sectional view of a motor provided in an embodiment of the present application;

[0022] FIG6 is a schematic structural diagram of a motor shaft provided in an embodiment of the present application;

[0023] FIG7 is a schematic structural diagram of a first claw pole, a second claw pole, and a first plastic part in a motor provided by an embodiment of the present application;

[0024] FIG8 is a schematic structural diagram of a first limiting groove, a second limiting groove, and a first through groove in a motor provided in an embodiment of the present application;

[0025] FIG9 is a schematic structural diagram of a second through slot in a motor provided in an embodiment of the present application;

[0026] FIG10 is a schematic structural diagram of a first claw plate and a second claw plate in a motor provided in an embodiment of the present application;

[0027] FIG11 is a schematic structural diagram of a first finger base and a first finger tip in a motor provided in an embodiment of the present application;

[0028] FIG12 is a schematic structural diagram of a third claw pole in a motor provided in an embodiment of the present application;

[0029] FIG13 is a schematic structural diagram of a fourth claw pole in a motor provided in an embodiment of the present application;

[0030] FIG14 is a schematic structural diagram of a motor cover provided in an embodiment of the present application. Modes for Carrying Out the Invention

[0031] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0032] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0033] In the embodiments of this application, "at least one" refers to one or more; "a plurality" refers to two or more. In the description of this application, the terms "first," "second," "third," etc. are used only for the purpose of distinguishing descriptions and should not be understood as indicating or implying relative importance or order.

[0034] References to "one embodiment" or "some embodiments" described in this specification mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, in this specification, the terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. It should be noted that in the embodiments of the present application, "and / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0035] It should be pointed out that, in the embodiments of the present application, when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. At the same time, "connection" in the embodiments of the present application may also be understood as electrical connection, and the connection between two electrical elements may be a direct or indirect connection between the two electrical elements. For example, A is connected to B, which may be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical elements. The terms "vertical", "horizontal", "left", "right" and similar expressions used in the embodiments of the present application are for illustrative purposes only and are not intended to limit the present application.

[0036] A motor provided in an embodiment of the present application is shown in Figures 1 to 14. The motor provided in an embodiment of the present application includes a plurality of magnets 1, which are arranged circumferentially around a rotating shaft 2. The magnetic properties of two adjacent magnets 1 at one end close to the rotating shaft 2 are opposite, and the magnetic properties of the other ends of two adjacent magnets 1 are opposite. The magnets 1 are sintered magnets 1.

[0037] In particular, multiple magnets 1 are fixedly connected to the rotating shaft 2. The multiple magnets 1 can refer to 2 magnets 1, 3 magnets 1, 4 magnets 1, 5 magnets 1, 6 magnets 1, etc. For example, if there are 6 magnets 1, the 6 magnets 1 are symmetrically distributed around the rotating shaft 2. After the 6 magnets 1 are spliced ​​together, the entire structure presents a cylindrical shape, and the rotating shaft 2 runs through the center of the cylinder. The magnetic properties of the end of each magnet 1 away from the rotating shaft 2 and the end close to the rotating shaft 2 are opposite. For example, if the magnetic pole of one magnet 1 close to the rotating shaft 2 is the north pole, the magnetic pole of the other end of the magnet 1 close to the rotating shaft 2 is the south pole. In addition, the magnetic properties of the ends of two adjacent magnets 1 close to the rotating shaft 2 are opposite. For example, if the magnetic pole of one magnet 1 close to the rotating shaft 2 is the north pole, the magnetic pole of the other magnet 1 close to the rotating shaft 2 is the south pole. The magnetic properties of the other ends of two adjacent magnets 1 are opposite. For example, if the magnetic pole of one end of a magnet 1 away from the rotation axis 2 is an S pole, the magnetic pole of the other end of the adjacent magnet 1 away from the rotation axis 2 is an N pole.

[0038] Among them, the use of sintered magnetic steel 1 for the magnetic steel 1 can effectively improve the torque of the product. Multiple magnetic steels 1 can be pre-processed and formed separately and then spliced ​​together, which can make the assembly process simpler and meet the assembly requirements of motors of different sizes.

[0039] In this embodiment, multiple magnetic steels 1 are arranged circumferentially around the rotating shaft 2, so that the magnetic properties of two adjacent magnetic steels 1 at one end near the rotating shaft 2 are opposite, and the magnetic properties of two adjacent magnetic steels 1 at the other end are opposite. The magnetic steels 1 are sintered magnetic steels 1. This method of separately forming multiple sintered magnetic steels 1 and then splicing them together improves magnetic circuit performance, simplifies the assembly process, meets the assembly requirements of motors of different sizes, improves stability and reliability, and facilitates improved motor driving performance. This achieves the technical effect of improving the motor's driving performance.

[0040] As an embodiment, referring to Figures 1 and 2, a motor provided in an embodiment of the present application also includes an adhesive layer 3, which is arranged between two adjacent magnetic steels 1. The two adjacent magnetic steels 1 are bonded and fixed to each other through the adhesive layer 3. The adhesive layer 3 can be made of glue. Using the adhesive layer 3 to fix the two adjacent magnetic steels 1 can improve the stability of the multiple magnetic steels 1 after splicing.

[0041] As an embodiment, the motor provided in this embodiment further includes a coating 4, which is disposed on the other end of the magnetic steel 1. Coating 4 can be made of Zn, Ni, or polymer materials. Specifically, coating 4 is disposed on the outer surface of the cylindrical body formed by splicing the magnetic steel 1.

[0042] In one embodiment, the magnetic energy product of the magnetic steel 1 is greater than 26MGOe. That is, assuming that the magnetic energy product of the magnetic steel 1 is (BH)max, then (BH)max ≥ 26MGOe. The intrinsic coercivity of the magnetic steel 1 is greater than 11KOe. That is, assuming that the intrinsic coercivity of the magnetic steel 1 is Hcj, then Hcj ≥ 11KOe.

[0043] As an embodiment, a motor provided in an embodiment of the present application further includes a first claw pole 5, a second claw pole 6, and a first plastic part 7. The first plastic part 7 is disposed outside the rotating shaft 2, and the magnet 1 is located between the rotating shaft 2 and the first plastic part 7. The first plastic part 7 includes a first limiting groove 71 and a second limiting groove 72. A plurality of first limiting grooves 71 are arranged in an interval, and a second limiting groove 72 is disposed between two adjacent first limiting grooves 71. The first claw pole 5 includes a first claw disk 51 and a plurality of first claw fingers 52. The plurality of first claw fingers 52 are connected to the first claw disk 51, and each first claw finger 52 is embedded in a corresponding first limiting groove 71. The first limiting groove 71 has space for accommodating the first claw finger 52. The second claw pole 6 includes a second claw plate 61 and a plurality of second claw fingers 62, and the plurality of second claw fingers 62 are connected to the second claw plate 61. Each second claw finger 62 is embedded in a corresponding second limiting groove 72. The second limiting groove 72 has space for accommodating the second claw finger 62. A second claw finger 62 is arranged between two adjacent first claw fingers 52, that is, the first claw fingers 52 and the second claw fingers 62 are alternately distributed along the outside of the rotating shaft 2.

[0044] As an embodiment, referring to Figures 6 to 8, the first plastic part 7 includes a first limiting portion 73, a second limiting portion 74 and a shell 75. The first limiting portion 73 and the second limiting portion 74 are arranged opposite to each other, and the shell 75 is connected to the first limiting portion 73 and the second limiting portion 74 respectively. A plurality of support members 76 are provided between the first limiting portion 73 and the second limiting portion 74. The first limiting portion 73 and two adjacent support members 76 enclose the above-mentioned first limiting groove 71, and the second limiting portion 74 and two adjacent support members 76 enclose the above-mentioned second limiting groove 72.

[0045] As an embodiment, the first limiting portion 73, the support member 76, and the housing 75 collectively form a first through-slot 77. The first claw finger 52 extends through the first through-slot 77. The first through-slot 77 and the first limiting slot 71 are interconnected, so that the first claw finger 52 extends into the first limiting slot 71 after extending through the first through-slot 77. The second limiting portion 74, the support member 76, and the housing 75 collectively form a second through-slot 78. The second claw finger 62 extends through the second through-slot 78. The second through-slot 78 and the second limiting slot 72 are interconnected, so that the second claw finger 62 extends into the second limiting slot 72 after extending through the second through-slot 78.

[0046] As an embodiment, the shell 75 includes a main body 751 and two extensions 752, the two extensions 752 are respectively connected to the main body 751, and the main body 751 is respectively connected to the first limiting portion 73 and the second limiting portion 74. The main body 751 and the two extensions 752 are surrounded to form an installation groove 753, and the interior of the installation groove 753 has a space for placing the coil 9.

[0047] As an embodiment, the first limiting portion 73 is located on one extension portion 752 along the longitudinal extension direction of the rotating shaft 2, and the first claw plate 51 is connected to the one extension portion 752. The second limiting portion 74 is located on the other extension portion 752 along the longitudinal extension direction of the rotating shaft 2, and the second claw plate 61 is connected to the other extension portion 752.

[0048] As an embodiment, after the first claw pole 5 and the second claw pole 6 are integrally injection-molded, the coil 9 can be wound integrally with the first claw pole 5 and the second claw pole 6. The first claw finger 52 is tapered in the direction approaching the second claw plate 61, and the second claw finger 62 is tapered in the direction approaching the first claw plate 51.

[0049] In some embodiments, referring to Figures 3 to 13 , the first claw finger 52 includes a first base portion 521 and a first tip portion 522. The first tip portion 522 is connected to the first base portion 521, which is connected to the first claw plate 51. The first tip portion 522 is concave along the direction approaching the rotating shaft 2. The second claw finger 62 includes a second base portion 621 and a second tip portion 622. The second tip portion 622 is connected to the second base portion 621, which is connected to the second claw plate 61. The second tip portion 622 is concave along the direction approaching the rotating shaft 2. The second tip portion 622 and the first tip portion 522 enclose a circular ring. This can increase the internal space of the circular ring, providing more space for accommodating the rotating shaft 2 and the multiple magnets 1 arranged circumferentially around the rotating shaft 2.

[0050] As an embodiment, the distance between the first finger base 521 and the rotating shaft 2 gradually increases as it approaches the first claw plate 51, so that the first finger base 521 is curved. The distance between the second finger base 621 and the rotating shaft 2 gradually increases as it approaches the second claw plate 61, so that the second finger base 621 is curved.

[0051] As an embodiment, a first gap 5221 is left between the first fingertip portion 522 and the second claw plate 61, and a second gap 6221 is left between the second fingertip portion 622 and the first claw plate 51. The spacing of the first gap 5221 is equal to the spacing of the second gap 6221, so that the connection between two adjacent support members 76 located within the spacing has a larger width.

[0052] In some embodiments, the extension lines of the two support members 76 on both sides of the first claw finger 52 intersect with each other. Providing the intersecting support members 76 helps to improve the strength of the overall structure of the first claw pole 5, the second claw pole 6, the first plastic member 7 and the support members 76.

[0053] In some embodiments, referring to FIG3 , a motor provided in an embodiment of the present application further includes a fifth claw pole 30, a sixth claw pole 301, another housing 40, another coil 50, and another plastic part 60. Since the fifth claw pole 30 has the same structure and principle as the first claw pole 5 described above, they will not be described here. Since the sixth claw pole 301 has the same structure and principle as the second claw pole 6 described above, they will not be described here. Since the structure and principle of the other housing 40 is the same as the structure and principle of the housing 8 described below, they will not be described here. Since the structure and principle of the other coil 50 is the same as the structure and principle of the coil 9 described above, they will not be described here. Since the structure and principle of the other plastic part 60 is the same as the structure and principle of the first plastic part 7 described above, they will not be described here. By respectively mounting the fifth claw pole 30 and the sixth claw pole 301 on another plastic part 60, mounting another coil 50 on the outside of the other plastic part 60, and sleeved with another housing 40 on the outside of the other coil 50, and mounting the first plastic part 7 and the other plastic part 60 in the vertical direction, the structure can accommodate a longer rotating shaft 2 and multiple longer magnets 1 arranged around the rotating shaft 2.

[0054] As another embodiment, referring to Figures 12 to 14 , a motor provided in an embodiment of the present application further includes a third claw pole 10, a fourth claw pole 20, and a second plastic part 203. The third claw pole 10 includes a third claw disk 101 and a plurality of third claw fingers 102. The plurality of third claw fingers 102 are connected to the third claw disk 101 and extend into the interior of the second plastic part 203. The plurality of third claw fingers 102 can be evenly spaced and located between the second plastic part 203 and the magnet 1. The fourth claw pole 20 includes a cover 201 and a plurality of fourth claw fingers 202. The plurality of fourth claw fingers 202 are connected to the cover 201 and located outside the second plastic part 203. The cover 201 can be provided with a mounting opening 2011. The plurality of fourth claw fingers 202 extend into the interior of the second plastic part 203 and are located between adjacent third claw fingers 102. The fourth claw fingers 202 can be evenly spaced and located between the second plastic part 203 and the magnet 1. The cover 201 can be connected to the third claw plate 101, and the third claw plate 101, the cover 201, and the second plastic part 203 enclose a space for the coil 9.

[0055] In some embodiments, a motor provided in an embodiment of the present application further includes a housing 8. Those skilled in the art will appreciate that the specific structure of the housing 8 in the motor provided in an embodiment of the present application is not limited. It is only necessary to place a first plastic part 7 provided with a coil 9, a first claw pole 5, and a second claw pole 6 inside the housing 8, and place a rotating shaft 2 and a plurality of magnets 1 arranged circumferentially around the rotating shaft 2 inside the first plastic part 7. The rotating shaft 2 and the plurality of magnets 1 arranged around the rotating shaft 2 can be driven to rotate inside the housing 8 by the energized coil 9.

[0056] The above is only an implementation method of the present application. It should be pointed out that for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present application, but these all fall within the scope of protection of the present application.

Claims

1. A motor, characterized in that: The motor includes: a plurality of magnets arranged circumferentially around a rotating shaft, wherein the magnetic properties of two adjacent magnets close to one end of the rotating shaft are opposite, and the magnetic properties of the other ends of two adjacent magnets are opposite, and the magnets are sintered magnets.

2. The motor according to claim 1, characterized in that The motor also includes: a first claw pole, a second claw pole and a first plastic part arranged outside the rotating shaft, the first plastic part includes a plurality of first limiting grooves arranged at intervals and a second limiting groove arranged between two adjacent first limiting grooves; the first claw pole includes a first claw plate and a plurality of first claw fingers connected to the first claw plate, and the first claw fingers are embedded in the corresponding first limiting grooves; the second claw pole includes a second claw plate and a plurality of second claw fingers connected to the second claw plate, and the second claw fingers are embedded in the corresponding second limiting grooves, and the second claw fingers are arranged between two adjacent first claw fingers.

3. The motor according to claim 2, characterized in that: The first plastic part includes a first limiting portion and a second limiting portion arranged opposite to each other, and a shell respectively connecting the first limiting portion and the second limiting portion. A plurality of support members are arranged between the first limiting portion and the second limiting portion. Two adjacent support members and the first limiting portion enclose the first limiting groove, and two adjacent support members and the second limiting portion enclose the second limiting groove.

4. The motor according to claim 3, characterized in that: The first limiting portion, the support member and the shell are enclosed to form a first through groove for the first claw finger to pass through, and the first through groove and the first limiting groove are communicated; the second limiting portion, the support member and the shell are enclosed to form a second through groove for the second claw finger to pass through, and the second through groove and the second limiting groove are communicated.

5. The motor according to claim 3, characterized in that: The shell includes a main body and two extensions respectively connected to the main body. The main body is respectively connected to the first limiting portion and the second limiting portion. The main body and the two extensions enclose a mounting groove for placing the coil.

6. The motor according to claim 2, characterized in that: The first claw finger is tapered in a direction approaching the second claw plate, the second claw finger is tapered in a direction approaching the first claw plate, and the first claw pole and the second claw pole are integrally injection-molded.

7. The motor according to claim 1, characterized in that The motor also includes: a third claw pole, a fourth claw pole, and a second plastic part arranged outside the rotating shaft. The third claw pole includes a third claw disk and a plurality of third claw fingers connected to the third claw disk. The plurality of third claw fingers extend into the second plastic part. The fourth claw pole includes a cover body and a plurality of fourth claw fingers connected to the cover body. The cover body is located outside the second plastic part. The plurality of fourth claw fingers extend into the second plastic part, and the fourth claw fingers are located between two adjacent third claw fingers.

8. The motor according to claim 1, characterized in that The motor further includes: an adhesive layer provided between two adjacent magnetic steels.

9. The motor according to claim 1, characterized in that The motor further includes a coating disposed on the other end of the magnetic steel.

10. The motor according to claim 1, characterized in that: The magnetic energy product of the magnetic steel is greater than 26MGOe, and the intrinsic coercive force of the magnetic steel is greater than 11KOe.

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