Disc type motor rotor and disc type motor

Abstract

The utility model relates to the technical field of motors, and discloses a disc type motor rotor and a disc type motor. The disc type motor comprises a stator and a disc type motor rotor, and the disc type motor rotor comprises a back plate and is made of a non-magnetic conductive material; the magnetic conductive blocks and the permanent magnet assemblies are arranged on the same side of the back plate and alternately arranged in the circumferential direction of the back plate, the adjacent magnetic conductive blocks and permanent magnet assemblies abut against each other, the permanent magnet assemblies are magnetized in the tangential direction, and first grooves and second grooves are formed in the opposite surfaces of the magnetic conductive blocks and the permanent magnet assemblies correspondingly. A positioning groove extending in the radial direction is defined by the first groove and the second groove. And each connecting piece is correspondingly inserted into one positioning groove and is fixedly connected with the back plate. According to the disc type motor rotor provided by the utility model, the connecting piece can be used for fixing the magnetic conductive block and the permanent magnet assembly, so that the disc type motor rotor is simple in structure and high in assembly efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a disc motor rotor and a disc motor. Background Art

[0002] The disc motor has the advantages of compact structure, high power density and torque density, high acceleration and response speed, etc., and is widely used in the fields of automobiles, industrial automation, etc.

[0003] The disc motor includes a stator and a rotor. The stator includes a stator core and a stator winding. After the stator winding is energized, it can generate axial magnetic lines of force. The rotor includes a magnetic conductor and a permanent magnet. The magnetic conductor and the permanent magnet are arranged alternately in the circumferential direction. In some existing solutions, the permanent magnet is magnetized tangentially, and in cooperation with the axial magnetic lines of force, the disc motor has both a permanent magnet torque and a reluctance torque. Therefore, when the maximum torque of the disc motor is the same, the amount of permanent magnet used can be saved, which can not only reduce the cost of the disc motor, but also improve the high-speed performance of the disc motor.

[0004] Since the permanent magnet of the rotor is magnetized tangentially and the permanent magnet is arranged closely to the magnetic conductor, it is necessary to ensure that the adjacent two magnetic conductors cannot be connected by a magnetic conductive material, otherwise it will cause a short circuit of the permanent magnet, and then lead to a decline in the motor performance. This requirement makes the structure of the disc motor rotor in the prior art complex and the assembly efficiency low. Summary of the Utility Model

[0005] An object of the utility model is to provide a disc motor rotor, in which the connecting piece can be used to fix both the magnetic conductive block and the permanent magnet assembly, so that the structure of the disc motor rotor is simple and the assembly efficiency is high.

[0006] To achieve the above object, the utility model adopts the following technical solutions:

[0007] A disc motor rotor, comprising:

[0008] A back plate, made of non-magnetic conductive material;

[0009] A plurality of magnetic conductive blocks and a plurality of permanent magnet assemblies, arranged on the same side of the back plate and alternately arranged along the circumference of the back plate. The adjacent magnetic conductive blocks and permanent magnet assemblies are in contact with each other. The permanent magnet assembly is magnetized tangentially. First grooves and second grooves are respectively arranged on the surfaces of the magnetic conductive block and the permanent magnet assembly facing each other. The first groove and the second groove enclose a positioning groove extending in the radial direction;

[0010] A plurality of connecting pieces, each connecting piece is correspondingly inserted into a positioning groove and fixedly connected to the back plate.

[0011] As an optional solution, the back plate includes:

[0012] The main body plate, and a plurality of the magnetic conduction blocks and a plurality of the permanent magnet assemblies are all arranged on one side of the main body plate;

[0013] The inner ring limiting plate is erected on one side of the main body plate, and the inner ring circumferential surfaces of the respective magnetic conduction blocks and the inner ring circumferential surfaces of the respective permanent magnet assemblies are all abutted against the inner ring limiting plate;

[0014] The outer ring limiting plate is erected on one side of the main body plate and is coaxially arranged outside the inner ring limiting plate, and the outer ring circumferential surfaces of the respective magnetic conduction blocks and the outer ring circumferential surfaces of the plurality of permanent magnet assemblies are all abutted against the outer ring limiting plate.

[0015] As an optional solution, a plurality of first threaded holes are arranged on the inner ring limiting plate along its circumferential direction, and the inner end of the connecting member in the radial direction is threadedly connected to the first threaded holes; a plurality of second threaded holes are arranged on the outer ring limiting plate along its circumferential direction, and the outer end of the connecting member in the radial direction is threadedly connected to the second threaded holes; or

[0016] A plurality of first mounting holes are arranged on the inner ring limiting plate along its circumferential direction, and the inner end of the connecting member in the radial direction is inserted into the first mounting holes and adhered to the inner wall of the first mounting holes; a plurality of second mounting holes are arranged on the outer ring limiting plate along its circumferential direction, and the outer end of the connecting member in the radial direction is inserted into the second mounting holes and adhered to the inner wall of the second mounting holes.

[0017] As an optional solution, the connecting member is made of a magnetic conduction material.

[0018] As an optional solution, the extending trajectory of the positioning groove is a straight line, the connecting member is a rod member and both ends are respectively connected to the back plate.

[0019] As an optional solution, the cross section of the connecting member is circular.

[0020] As an optional solution, the permanent magnet assembly includes one permanent magnet; or

[0021] The permanent magnet assembly includes a plurality of permanent magnets and a plurality of magnetic conduction members, and the permanent magnets and the magnetic conduction members are alternately arranged along the circumferential direction.

[0022] Another object of the present invention is to provide a disc motor, by adopting the above disc motor rotor, which has a simple structure and high assembly efficiency.

[0023] To achieve this purpose, the present invention adopts the following technical solutions:

[0024] The disc motor includes a stator and the above disc motor rotor, and the stator and the disc motor rotor are arranged in a circumferential arrangement.

[0025] As an alternative solution, the pole-slot combination of the stator is 9N slots and 2N poles, where N is a positive integer.

[0026] As an alternative solution, the disc motor includes two disc motor rotors and a stator, and the two disc motor rotors are arranged on both sides of the stator; or

[0027] The disc motor includes two stators and one disc motor rotor, and the two stators are arranged on both sides of the disc motor rotor.

[0028] The beneficial effects of the present utility model are as follows:

[0029] For the disc motor rotor of the present utility model, a plurality of magnetic conduction blocks and a plurality of permanent magnet assemblies are alternately arranged along the circumference of the back plate, and the back plate is made of non-magnetic conductive material, so magnetic circuit short circuit between adjacent permanent magnet assemblies can be avoided; the first groove and the second groove on the opposite surfaces of the magnetic conduction block and the permanent magnet assembly enclose to form a positioning groove, and the connecting piece is fixedly connected to the back plate and is inserted and matched with the positioning groove. Therefore, the connecting piece can both axially limit the corresponding magnetic conduction block and circumferentially limit the corresponding permanent magnet assembly, thereby simplifying the connection structure of the disc motor rotor and improving the assembly efficiency of the disc motor rotor. Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of the disc motor provided by the specific embodiment of the present utility model;

[0031] Figure 2 is a front view of the disc motor rotor provided by the specific embodiment of the present utility model;

[0032] Figure 3 is an exploded view of the disc motor rotor provided by the specific embodiment of the present utility model;

[0033] Figure 4 is Figure 3 the enlarged view at A in

[0034] In the figure:

[0035] 10. Disc motor rotor; 11. Back plate; 114. Main body plate; 115. Inner ring limiting plate; 1151. First threaded hole; 116. Outer ring limiting plate; 1161. Second threaded hole; 118. Central hole; 12. Magnetic conduction block; 124. First groove; 13. Permanent magnet assembly; 131. Second groove; 16. Connecting piece; 17. Positioning groove;

[0036] 20. Stator;

[0037] 30. Output shaft. Specific Embodiments

[0038] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0039] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0040] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above the top of", and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the bottom of", and "under the bottom of" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0041] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0042] This embodiment provides a disc-type motor rotor and a disc-type motor. As Figure 1 shown, the disc-type motor includes a disc-type motor rotor 10, a stator 20, and an output shaft 30. The stator 20 and the disc-type motor rotor 10 are arranged axially (i.e., the X direction in the figure), and the output shaft 30 is connected to the rotor. When the motor is working, after the stator 20 is energized, a magnetic field is generated, and the disc-type motor rotor 10 drives the output shaft 30 to rotate under the action of the magnetic field.

[0043] In this embodiment, the disc motor includes a stator 20 and two disc motor rotors 10. The two disc motor rotors 10 are respectively arranged on both sides of the stator 20. The output shaft 30 penetrates through the stator 20 and is respectively connected to the two disc motor rotors 10 at both ends. In some embodiments, the disc motor includes a disc motor rotor 10 and two stators 20. The two stators 20 are respectively arranged on both sides of the disc motor rotor 10. In other embodiments, the disc motor may also include only one disc motor rotor 10 and one stator 20.

[0044] As Figure 2 shown, the disc motor rotor 10 includes a plurality of magnetic conduction blocks 12 and a plurality of permanent magnet assemblies 13. The magnetic conduction blocks 12 and the permanent magnet assemblies 13 are arranged alternately in the circumferential direction. The adjacent magnetic conduction blocks 12 and the permanent magnet assemblies 13 are in contact with each other. The permanent magnet assemblies 13 are magnetized tangentially, and the magnetic pole directions of the adjacent permanent magnet assemblies 13 are opposite. Therefore, in cooperation with the magnetic force lines in the axial direction of the stator 20, the disc motor has both a permanent magnet torque and a reluctance torque. When the maximum torque of the disc motor is the same, the amount of permanent magnets used can be saved, which can not only reduce the cost of the disc motor, but also improve the high-speed performance of the disc motor.

[0045] Preferably, the pole-slot combination of the stator 20 is 9N slots and 2N poles, where N is a positive integer. By setting the stator 20 to the above-mentioned pole-slot combination, the disc motor can have a higher reluctance torque, thereby further reducing the manufacturing cost of the disc motor and improving the high-speed performance of the disc motor. Optionally, N can be 1, 2, 3, 4, and the corresponding pole-slot combinations are 9 slots and 2 poles, 18 slots and 4 poles, 27 slots and 6 poles, 36 slots and 8 poles. Of course, the value of N can also be 5 or larger, and no specific limitation is made here. It should be noted that the stator 20 can obtain the above-mentioned pole-slot combination by selecting an appropriate winding method, and the corresponding winding method is the prior art and will not be elaborated here.

[0046] Since the permanent magnet assemblies 13 are magnetized tangentially and the permanent magnet assemblies 13 are arranged closely to the magnetic conduction blocks 12, it is necessary to ensure that the adjacent two magnetic conduction blocks 12 cannot be connected by a magnetic conduction material, otherwise it will cause a short circuit of the permanent magnets. In the prior art, connection structures are usually set for each permanent magnet and magnetic conductor one by one, resulting in a complex structure of the disc motor rotor 10 and low assembly efficiency.

[0047] As Figures 2 - 4As shown, the disc motor rotor 10 further includes a back plate 11 and a plurality of connecting members 16. Among them, the back plate 11 is made of non-magnetic material, and a plurality of magnetic conduction blocks 12 and a plurality of permanent magnet assemblies 13 are arranged on the same side of the back plate 11. First grooves 124 and second grooves 131 are respectively arranged on the surfaces of the magnetic conduction blocks 12 and the permanent magnet assemblies 13 facing each other, and the first grooves 124 and the second grooves 131 enclose a positioning groove 17 extending in the radial direction. Each connecting member 16 is correspondingly inserted and matched with a positioning groove 17 and is fixedly connected to the back plate 11.

[0048] In the disc motor rotor 10 of this embodiment, a plurality of magnetic conduction blocks 12 and a plurality of permanent magnet assemblies 13 are alternately arranged along the circumferential direction of the back plate 11, and the back plate 11 is made of non-magnetic material, so that magnetic circuit short-circuit between adjacent permanent magnet assemblies 13 can be avoided; the first grooves 124 and the second grooves 131 on the surfaces of the magnetic conduction blocks 12 and the permanent magnet assemblies 13 facing each other enclose a positioning groove 17, and the connecting member 16 is fixedly connected to the back plate 11 and is inserted and matched with the positioning groove 17, so that the connecting member 16 can both axially limit the corresponding magnetic conduction block 12 and circumferentially limit the corresponding permanent magnet assembly 13 at the same time, thereby simplifying the connection structure of the disc motor rotor 10 and improving the assembly efficiency of the disc motor rotor 10.

[0049] In this embodiment, the back plate 11 is preferably made of a high-strength non-magnetic material to avoid deformation of the back plate 11 during the operation of the motor. Optionally, the back plate 11 can be made of materials such as titanium alloy, aluminum alloy, glass fiber, carbon fiber, etc. Optionally, the magnetic conduction block 12 can be made of materials with good magnetic conduction performance such as silicon steel sheet, SMC material, steel, iron, amorphous alloy, etc. Optionally, in some embodiments, the permanent magnet assembly 13 includes a permanent magnet. In some embodiments, the permanent magnet assembly 13 includes a plurality of permanent magnets and a plurality of magnetic conductors, the magnetic pole directions of the plurality of permanent magnets are the same, and the permanent magnets and the magnetic conductors are alternately arranged along the circumferential direction to form an integral permanent magnet assembly 13.

[0050] Preferably, the connecting member 16 is made of magnetic material to avoid the connecting member 16 affecting the magnetic line distribution of the permanent magnet assembly 13. Specifically, the connecting member 16 can be made of materials with good magnetic conduction performance such as silicon steel, SMC material, steel, iron, amorphous alloy, etc.

[0051] In this embodiment, the first groove 124 extends along the radial direction of the disc-type motor rotor 10, and the second groove 131 also extends along the radial direction of the disc-type motor rotor 10. Therefore, the positioning groove 17 formed by the first groove 124 and the second groove 131 also extends along the radial direction of the disc-type motor rotor 10. Further, the extending trajectory of the positioning groove 17 is a straight line. Correspondingly, the connecting member 16 is a rod, and both ends of the rod are respectively connected to the back plate 11. Such a setting can reduce the assembly difficulty of the connecting member 16. Optionally, the cross-section of the positioning groove 17 is circular. Correspondingly, the cross-section of the connecting member 16 is circular. Therefore, when installing the connecting member 16, it is not necessary to adjust the orientation, which can further improve the convenience of assembly.

[0052] As Figure 3 shown, the back plate 11 includes a main body plate 114, an inner ring limiting plate 115, and an outer ring limiting plate 116. A plurality of magnetic conduction blocks 12 and a plurality of permanent magnet assemblies 13 are all arranged on one side of the main body plate 114. The inner ring limiting plate 115 is erected on one side of the main body plate 114. The inner peripheral surfaces of the respective magnetic conduction blocks 12 and the inner peripheral surfaces of the respective permanent magnet assemblies 13 are all abutted against the inner ring limiting plate 115. The outer ring limiting plate 116 is erected on one side of the main body plate 114 and is coaxially arranged outside the inner ring limiting plate 115. The outer peripheral surfaces of the respective magnetic conduction blocks 12 and the outer peripheral surfaces of the plurality of permanent magnet assemblies 13 are all abutted against the outer ring limiting plate 116. The inner ring limiting plate 115 can limit the inner ends of the respective magnetic conduction blocks 12 and the permanent magnet assemblies 13 in the radial direction, and the outer ring limiting plate 116 can limit the outer ends of the respective magnetic conduction blocks 12 and the permanent magnet assemblies 13 in the radial direction. That is to say, the back plate 11 plays a role of radially limiting the permanent magnet assembly 13 and the magnetic conduction block 12 in this application, without the need to additionally increase components, further simplifying the structure of the disc-type motor rotor 10 and further improving the assembly efficiency of the disc-type motor rotor 10.

[0053] In this embodiment, the main body plate 114 is an annular structure, and the central hole 118 of the main body plate 114 is used for installing the output shaft 30. The inner ring limiting plate 115 is arranged in the middle region of the back plate 11 along the radial direction, and the outer ring limiting plate 116 is arranged at the outer edge of the back plate 11. Optionally, the main body plate 114, the inner ring limiting plate 115, and the outer ring limiting plate 116 can be integrally formed or can be a split structure and connected together by means of welding, fasteners, etc.

[0054] As Figure 3 and Figure 4As shown, a plurality of first threaded holes 1151 are provided along the circumference of the inner ring limiting plate 115. The inner end of the connecting member 16 in the radial direction is provided with an external thread, and the inner end of the connecting member 16 in the radial direction is threadedly connected to the first threaded hole 1151. A plurality of second threaded holes 1161 are provided along the circumference of the outer ring limiting plate 116. The outer end of the connecting member 16 in the radial direction is provided with an external thread, and the outer end of the connecting member 16 in the radial direction is threadedly connected to the second threaded hole 1161. When assembling the disc-type motor rotor 10, first, a plurality of permanent magnet assemblies 13 and a plurality of magnetic conduction blocks 12 are alternately placed between the inner ring limiting plate 115 and the outer ring limiting plate 116. Then, the connecting member 16 is rotated and sequentially inserted into the second threaded hole 1161, the corresponding positioning groove 17, and the corresponding first threaded hole 1151 in the radial direction until the inner end of the connecting member 16 is threadedly connected to the first threaded hole 1151 on the inner ring limiting plate 115. At this time, the outer end of the connecting member 16 is just threadedly connected to the second threaded hole 1161 on the outer ring limiting plate 116.

[0055] It should be noted that to ensure the smooth installation of the connecting member 16, the diameter of the first threaded hole 1151 is not greater than the diameter of the second threaded hole 1161. The diameter of the part of the connecting member 16 where the external thread is provided at the inner end in the radial direction is not greater than the diameter of the middle part of the connecting member 16, and the diameter of the middle part of the connecting member 16 is not greater than the diameter of the part where the external thread is provided at the outer end of the connecting member 16 in the radial direction.

[0056] In other embodiments (not shown), a plurality of first mounting holes are provided along the circumference of the inner ring limiting plate 115. The inner end of the connecting member 16 in the radial direction is inserted into the first mounting hole and adhered to the inner wall of the first mounting hole. A plurality of second mounting holes are provided along the circumference of the outer ring limiting plate 116. The outer end of the connecting member 16 in the radial direction is inserted into the second mounting hole and adhered to the inner wall of the second mounting hole.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. The content of this specification should not be construed as a limitation to the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A disc-type motor rotor, characterized in that: include: A back plate (11) made of a non-magnetic material; A plurality of magnetic conductive blocks (12) and a plurality of permanent magnet assemblies (13) are arranged on the same side of the back plate (11) and are alternately arranged along the circumference of the back plate (11); adjacent magnetic conductive blocks (12) and permanent magnet assemblies (13) are in contact with each other; the permanent magnet assemblies (13) are tangentially magnetized; a first groove (124) and a second groove (131) are respectively arranged on surfaces of the magnetic conductive blocks (12) and the permanent magnet assemblies (13) facing each other; the first groove (124) and the second groove (131) are arranged to form a positioning groove (17) extending in the radial direction; A plurality of connecting members (16), each of the connecting members (16) is plug-fitted into a corresponding positioning groove (17) and is fixedly connected to the back plate (11).

2. The disc motor rotor according to claim 1, characterized in that: The back plate (11) comprises: A main body plate (114), wherein the plurality of magnetic conductive blocks (12) and the plurality of permanent magnet assemblies (13) are all arranged on one side of the main body plate (114); An inner ring limiting plate (115) is vertically arranged on one side of the main body plate (114), and the inner ring circumference of each magnetic conductive block (12) and the inner ring circumference of each permanent magnet assembly (13) are both against the inner ring limiting plate (115); An outer ring limiting plate (116) is vertically arranged on one side of the main plate (114) and is coaxially arranged on the outer side of the inner ring limiting plate (115). The outer ring circumference of each of the magnetic conductive blocks (12) and the outer ring circumference of the plurality of permanent magnet assemblies (13) are in contact with the outer ring limiting plate (116).

3. The disc motor rotor according to claim 2, characterized in that: The inner ring limiting plate (115) is provided with a plurality of first threaded holes (1151) along its circumference, and the radial inner end of the connecting member (16) is threadedly connected to the first threaded hole (1151); the outer ring limiting plate (116) is provided with a plurality of second threaded holes (1161) along its circumference, and the radial outer end of the connecting member (16) is threadedly connected to the second threaded hole (1161); or The inner ring limiting plate (115) is provided with a plurality of first mounting holes along its circumference, and the connecting member (16) is inserted into the first mounting hole along the radial inner end and bonded to the inner wall of the first mounting hole; the outer ring limiting plate (116) is provided with a plurality of second mounting holes along its circumference, and the connecting member (16) is inserted into the second mounting hole along the radial outer ring and bonded to the inner wall of the second mounting hole.

4. The disc motor rotor according to any one of claims 1 to 3, characterized in that: The connecting piece (16) is made of magnetic conductive material.

5. The disc motor rotor according to any one of claims 1 to 3, characterized in that: The extension track of the positioning groove (17) is a straight line, and the connecting member (16) is a rod member with two ends respectively connected to the back plate (11).

6. The disc motor rotor according to any one of claims 1 to 3, characterized in that: The cross section of the connecting piece (16) is circular.

7. The disc motor rotor according to any one of claims 1 to 3, characterized in that: The permanent magnet assembly (13) comprises a permanent magnet; or The permanent magnet assembly (13) comprises a plurality of permanent magnets and a plurality of magnetic conductive parts, wherein the permanent magnets and the magnetic conductive parts are alternately arranged along the circumferential direction.

8. A disc motor, characterized in that: It comprises a stator (20) and a disc-type motor rotor as claimed in any one of claims 1 to 7, wherein the stator (20) and the disc-type motor rotor are arranged in a circumferential direction.

9. The disc motor according to claim 8, characterized in that: The pole slots of the stator (20) are matched to form 9N slots and 2N poles, wherein N is a positive integer.

10. The disk motor according to claim 8, characterized in that: The disc motor comprises two disc motor rotors and a stator (20), wherein the two disc motor rotors are arranged on both sides of the stator (20); or The disc motor comprises two stators (20) and a disc motor rotor, wherein the two stators (20) are arranged on both sides of the disc motor rotor.

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