AU2017396544A1 - Steel magnet fixing structure of disk motor - Google Patents
Steel magnet fixing structure of disk motor Download PDFInfo
- Publication number
- AU2017396544A1 AU2017396544A1 AU2017396544A AU2017396544A AU2017396544A1 AU 2017396544 A1 AU2017396544 A1 AU 2017396544A1 AU 2017396544 A AU2017396544 A AU 2017396544A AU 2017396544 A AU2017396544 A AU 2017396544A AU 2017396544 A1 AU2017396544 A1 AU 2017396544A1
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- Australia
- Prior art keywords
- steel magnet
- groove
- tenon
- steel
- fixing member
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The present invention relates to a rotor steel magnet fixing structure of a disk motor. The present 5 invention solves the defects in the prior art that the steel magnet is difficult to be processed, the technique is complicated and the cost is high since both sides of the steel magnet adopt the tongue-and-groove connecting manner. The steel magnet fixing structure of a disk motor comprises a rotor disk with a rotating shaft hole in the middle, wherein the rotor disk is provided, in the circumferential direction, with a plurality of fan-shaped-structure steel magnet grooves 10 matched with steel magnets, two radial ends of the steel magnet are fixed in the steel magnet mounting groove by fixing members and at least one surface is exposed, and the exposed surface of the steel magnet is flush with the surface of the rotor disk. After the radial ends of the steel magnet are fixed, the exposed surface of the steel magnet is flush with two surfaces of the rotor disk, and do not affect the air gap length of the motor; and the fixing member is matched with the 15 radial ends of the steel magnet, which simplifies the structure of the steel magnet, and the assembly gap of the steel magnet is adjusted through the fixing member, thereby lowering the processing difficulty, simplifying the technique, lowering the eddy current loss and enhancing the work efficiency of the motor.
Description
Steel Magnet Fixing Structure of Disk Motor
Technical Field
The present invention belongs to the technical field of motors, in particular to a steel magnet fixing structure of a disk motor.
Background Art
The steel magnet of the disk permanent magnet motor is generally mounted on the rotor, and the fixing of the rotor steel magnet of the disk permanent magnet motor has always been a problem. This has largely limited the development of disk permanent magnet motors. The steel magnet fixing structure of the disk permanent magnet motor will affect the production process of the whole rotor and the magnetic flux of the rotor surface, which will affect the performance of the whole motor and the promotion and application of the disk flux motor.
Chinese Patent CN101919140B discloses a rotor for a motor, in which a hole is disposed in the rotor, a permanent magnet slides into the hole, a tongue and groove configuration is used to limit the magnets in the axial and circumferential directions, and a reinforcing strip is wrapped around the radial outer edge of the rotor to provide radial constraint for the steel magnet; however, this structure needs to open a groove on the radial side edge of the steel magnet, increasing the processing difficulty of the steel magnet, and in addition, this structure also needs to restrain the radial outer edge of the steel magnet with a reinforcing strip, which is complicated in technique and high in cost.
Chinese patent CN203504325U discloses a permanent magnet fixing structure of a double stator circumferential magnetic field brushless DC motor rotor, in which a method of arranging one or more fixing pieces on the outer circumference of the steel magnet and positioning the steel magnet by the fixing pieces; however, this fixing structure causes the fixing piece to protrude on the surface of the steel magnet, which obviously affects the air gap length of the motor, and if the fixing piece is too thin, the permanent magnet does not have sufficient mechanical strength of fixing and can be easily loosened and detached.
Chinese patent CN204578231U discloses a permanent magnet motor rotor, in which the magnet is fixed in the rotor disk in a tapered matching manner. Although it is not necessary to process the groove or use the fixing piece, the tapered mounting groove has higher processing requirements, and at the same time, higher processing requirements are also imposed on the magnet, and processing and assembly become more difficult in order to ensure the assembly precision during the assembly.
Summary of the Invention
The present invention solves the defects in the prior art that the steel magnet is difficult to be processed, the technique is complicated and the cost is high since both sides of the steel magnet adopt the tongue-and-groove connecting manner, and provides a steel magnet fixing structure of a disk motor. The steel magnet is fixed on the rotor disk by the fixing member, so the structure of the steel magnet is simplified. The assembly gap of the steel magnet is adjusted by the fixing member, thereby lowering the assembly difficulty, simplifying the technique, lowering the eddy current loss, and enhancing the work efficiency of the motor.
The invention also solves the defects in the prior art that the fixing piece is used to fix the steel magnet, causing the fixing piece to protrude on the surface of the steel magnet and affecting the air gap length of the motor, and a steel magnet fixing structure of a disk motor is provided to ensure the steel magnet to be flush with the rotor surface and not to affect the air gap length of the motor.
The present invention solves the defects in the prior art of higher processing requirements and assembly difficulty since the steel magnet is fixed to the rotor disk in a tapered matching manner, and provides a steel magnet fixing structure of a disk motor. The steel magnet is fixed on the rotor disk by the fixing member, so the structure of the steel magnet is simplified. The assembly gap of the steel magnet is adjusted by the fixing member, thereby lowering the assembly difficulty, simplifying the technique, lowering the eddy current loss, and enhancing the work efficiency of the motor.
The specific technical scheme adopted by the present invention is as follows: a steel magnet fixing structure of a disk motor, comprising a rotor disk with a rotating shaft hole in the middle, wherein the rotor disk is provided, in the circumferential direction, with a plurality of fan-shaped-structure steel magnet grooves for mounting steel magnets, two radial ends of the steel magnet are fixed in the steel magnet groove by fixing members and at least one surface is exposed, and the exposed surface of the steel magnet is flush with the surface of the opening of the steel magnet groove on the rotor disk. After the radial ends of the steel magnet are fixed, the exposed surface of the steel magnet is flush with two surfaces of the rotor disk, and do not affect the air gap length of the motor; and the fixing members are matched with the radial ends of the steel magnet, which simplifies the structure of the steel magnet, and the assembly gap of the steel magnet is adjusted through the fixing members, thereby lowering the processing difficulty, simplifying the technique, lowering the eddy current loss and enhancing the work efficiency of the motor.
Preferably, two side edges of the steel magnet groove are straight edges, the steel magnet is fan-shaped, two side edges of the steel magnet are straight edges, the steel magnet is fixed in the steel magnet groove, and the straight edges are attached to each other. The two side edges of the steel magnet are straight edges, and the two side edges of steel magnet groove are straight edges, so it is convenient for processing and can ensure the precision.
Preferably, the fixing members are integrally molded with the two radial ends of the steel magnet; or the fixing member is divided into an inner fixing member and an outer fixing member, the inner fixing member fixes the inner diameter end of the steel magnet, the outer fixing member fixes the outer diameter end of the steel magnet, and the inner fixing member and outer fixing member are connected to the inner diameter end and the outer diameter end of the steel magnet in a tenon-and-mortise manner. The fan-shaped steel magnet has a small processing length at the inner diameter end and the outer diameter end, which is convenient for processing, and for steel magnet processing, the inner fixing member and the outer fixing member are integrally molded by casting the two radial ends of the steel magnet, and the casting can be performed by injection molding or cast aluminum; or the two ends of the steel magnet are connected with the fixing member in a tenon-and-mortise manner, so the steel magnet has a simple structure and convenient connection.
Preferably, the two radial ends of the steel magnet are respectively provided with an inner tenon and an outer tenon, the inner fixing member and the outer fixing member are respectively provided with an inner tenon groove and an outer tenon groove, the inner tenon is matched with the inner tenon groove, and the outer tenon is matched with the outer tenon groove; or, the two radial ends of the steel magnet are respectively provided with an inner tenon groove and an outer tenon groove, the inner fixing member and the outer fixing member are respectively provided with an inner tenon and an outer tenon, the inner tenon is matched with the inner tenon groove, and the outer tenon is matched with the outer tenon groove.
Preferably, the two radial ends of the steel magnet are respectively provided with an inner tenon and an outer tenon, the inner fixing member and the outer fixing member are fixed to the rotor disk to form an inner tenon groove and an outer tenon groove, the inner tenon is matched with the inner tenon groove, and the outer tenon is matched with the outer tenon groove.
Preferably, the inner diameter end of the steel magnet groove is provided with an inner connecting edge, the outer diameter end of the steel magnet groove is provided with an outer connecting edge, and the two fixing members are respectively fixed on the inner connecting edge and the outer connecting edge.
Preferably, the inner diameter end of the steel magnet groove is arc-shaped, the outer diameter end of the steel magnet groove is arc-shaped, spaced spokes are formed among the steel magnet grooves, and the spoke has an equal-width structure or a gradually widening structure with a narrow inside and a wide outside.
Preferably, the steel magnet groove is a through structure, that is, the steel magnet groove runs through the two side surfaces of the rotor disk, and after the steel magnet is fixed by two fixing members, the two side surfaces of the steel magnet are flush with the two side surfaces of the rotor disk.
Preferably, the steel magnet groove has a groove bottom to form a single-side closed structure, and after the steel magnet is fixed by two fixing members, one side surface of the steel magnet is attached to the groove bottom surface, and the other side surface of the steel magnet is flush with the plane of the opening of the steel magnet slot of the rotor disk.
Preferably, a portion of the rotor disk corresponding to the outer diameter end of the steel magnet groove is provided with an outer limit step.
The present invention has the beneficial effects: after the radial ends of the steel magnet are fixed, the exposed surface of the steel magnet is flush with two surfaces of the rotor disk, and do not affect the air gap length of the motor; and the fixing members are matched with the radial ends of the steel magnet, which simplifies the structure of the steel magnet, and the assembly gap of the steel magnet is adjusted through the fixing member, thereby lowering the processing difficulty, simplifying the technique, lowering the eddy current loss and enhancing the work efficiency of the motor.
Brief Description of the Drawings
FIG. 1 is a structure diagram of the present invention;
FIG. 2 is a sectional view of the present invention;
FIG. 3 is an assembly diagram of the present invention;
FIG. 4 is a rotor disk structure diagram of the present invention;
FIG. 5 is a second structure diagram of the present invention;
FIG. 6 is a sectional view of the structure shown in FIG. 5 of the present invention;
FIG. 7 is an assembly diagram of the structure shown in FIG. 5 of the present invention;
FIG. 8 is a rotor disk structure diagram of the structure shown in FIG. 5 of the present invention;
FIG. 9 is a third structure diagram of the present invention;
FIG. 10 is a fourth structure diagram of the present invention;
FIG. 11 is a fifth structure diagram of the present invention; and
FIG. 12 is a sixth structure diagram of the present invention.
In the drawings: 1. rotor disk, 2. steel magnet, 3. outer fixing member, 4. screw, 5. inner fixing member, 6. steel magnet groove, 7. outer connecting edge, 8. inner connecting edge, 9. outer tenon, 10. outer matching groove, 11. inner tenon groove, 12. inner tenon, 13. inner tenon groove, 14. inner arc-shaped end, 15. spoke, 16. operating hole, 17. outer spoke edge, 18. outer limit step.
Detailed Description of the Invention
The present invention will be further described below by way of specific embodiments and with reference to the accompanying drawings.
Embodiment 1: a steel magnet fixing structure of a disk motor (referring to FIG. 1, FIG. 2, FIG. 3 and FIG. 4), which comprises a circular rotor disk 1, the middle of the rotor disk is provided with a rotating shaft hole for mounting and fixing a rotating shaft, the radial outer portion of the rotating shaft hole is a disk portion, the disk portion of the rotor disk is uniformly provided with a plurality of steel magnet grooves 6, the steel magnet groove runs through the two side surfaces of the rotor disk, the steel magnet groove is in a symmetrical fan shape, the symmetric line of the fan shape passes through the center of circle of the rotor disk, the two sides of the steel magnet are straight edges, the intersection of extension lines of the straight edges is located on the disk portion, the intersections of the extension lines of the straight edges of all the steel magnet grooves are located on the circle of the disk portion with the axis of the rotating shaft hole as the center of circle. A spoke 15 is disposed between the fan-shaped steel magnet grooves on the disk portion, the thickness of the spoke is equal to the thickness of the disk portion, and the width of the spoke is equal. The inner diameter end of the steel magnet groove is provided with an inner connecting edge 8, the outer diameter end of the steel magnet groove is provided with an outer connecting edge 7, the thickness of the inner connecting edge and the thickness of the outer connecting edge are equal and are respectively less than the thickness of the disk portion, and the inner connecting edge and the outer connecting edge are both eccentric relative to the disk portion. In this embodiment, the thickness of the inner connecting edge and the thickness of outer connecting edge are respectively 1/2 of the thickness of the disk portion, the inner connecting edge and the outer connecting edge are flush with one side surface of the disk portion, and the inner connecting edge and the outer connecting edge form a concave inner connecting groove and a concave outer connecting groove on the other side surface of the disk portion. The side edge of the inner connecting edge facing the steel magnet groove is in a convex arc shape, one end of the inner connecting groove facing the rotating shaft hole is in a convex arc shape facing the rotating shaft hole, and the side edge of the outer connecting edge facing the steel magnet groove is in an concave arc shape. The middle positions of the inner connecting edge and the outer connecting edge are respectively provided with a threaded hole.
A steel magnet 2 is disposed in the steel magnet groove, and the thickness of the steel magnet is equal to the thickness of the steel magnet groove; after the steel magnet is put in, the two surfaces of the steel magnet are exposed, and the two exposed surfaces are flush with the two surfaces of the disk portion, the steel magnet is fan-shaped, the two sides of the steel magnet are straight edges, the inner diameter end of the steel magnet is fixed to the inner connecting edge through an inner fixing member 5, and the outer diameter end of the steel magnet is fixed to the outer connecting edge through an outer fixing member 3; and after the steel magnet is fixed, the straight edges on the two sides of the steel magnet are attached to the straight edges on the two sides of the steel magnet groove.
The inner diameter end of the steel magnet is provided with an inner tenon 12 having a rectangular cross section, the outer diameter end of the steel magnet is provided with an outer tenon 9 having a rectangular cross section, the thickness of the inner tenon and the thickness of the outer tenon are equal and are respectively less than 1/2 of the thickness of the steel magnet, and the inner tenon and the outer tenon are located on the central plane of the steel magnet. The end surface of the inner tenon is in a concave arc shape, and the end surface of the outer tenon is in a convex arc shape. The inner fixing member and the outer fixing member each have an h-shaped radial cross section, each have two thicknesses in a ratio of 1:2, the maximum thickness is equal to the thickness of the disk portion, a shoulder portion is between the portion having a small thickness and the portion having a large thickness, the shoulder portion is arc-shaped, and the portion having a small thickness forms an inner matching groove. The end having a small thickness of the inner fixing member is a convex inner arc-shaped end 14, the inner arc-shaped end coincides with the convex arc shape of the inner connecting groove, the inner matching groove is matched with the inner connecting edge, the portion having a small thickness overlaps the inner connecting edge, and the portion having a small thickness is provided with a circular hole. The end having a large thickness of the inner fixing member is a concave inner tenon groove 13, the position and shape of the inner tenon groove are consistent with those of the inner tenon of the steel magnet, the bottom of the inner tenon groove is in a concave arc shape, the inner tenon of the steel magnet is inserted into the inner tenon groove, the inner fixing member is matched with the inner connecting edge, the shoulder portion of the inner fixing member is attached to the convex arc-shaped side edge of the inner connecting edge, the circular hole and the threaded hole are coaxial, a screw 4 is screwed in from one side of the circular hole, the screw is screwed into the threaded hole to fix the inner fixing member to the inner connecting edge, and at this time, the two side surfaces of the steel magnet are flush with the two side surfaces of the disk portion. The portion having a small thickness of the outer fixing member forms an outer matching groove 10, the end having a large thickness is a concave outer tenon groove 11, the position and shape of the outer tenon groove are consistent with those of the outer tenon of the steel magnet, the bottom of the outer tenon groove is in a concave arc shape, the outer tenon of the steel magnet is inserted into the outer tenon groove, the outer fixing member is matched with the outer connecting edge, the outer matching groove is matched with the outer connecting edge, the portion having a small thickness overlaps the outer connecting edge, and the portion having a small thickness is provided with a circular hole. The outer tenon of the steel magnet is inserted into the outer tenon groove, the outer fixing member is matched with the outer connecting edge, the shoulder portion of the outer fixing member is attached to the concave arc-shaped side edge of the outer connecting edge, the circular hole and the threaded hole are coaxial, the screw 4 is screwed in from one side of the circular hole, the screw is screwed into the threaded hole to fix the outer fixing member to the outer connecting edge, and at this time, the two side surfaces of the steel magnet are flush with the two side surfaces of the disk portion and the outer end surface of the outer fixing member is flush with the outer circumferential surface of the rotor disk.
The two sides of the steel magnet are straight edges, and the two sides of the steel magnet groove are straight edges, so it is simple for processing, thereby lowering the difficulty of the processing technique, and especially lowering the requirements for precision of the straight edges. After the steel magnet is assembled into the steel magnet groove, the straight edges contact each other, and the contact gap between the straight edges can be reduced through the control in the radial direction due to its fan shape. This embodiment simply meets the requirements of the two sides of the steel magnet being flush with the two sides of the disk portion. The widths of the spokes on the rotor disk are equal, so the steel magnet groove is simpler to process.
Embodiment 2: a steel magnet fixing structure of a disk motor (referring to FfG. 5, FfG. 6, FfG. 7 and FfG. 8), which comprises a circular rotor disk 1, the middle of the rotor disk is provided with a rotating shaft hole for mounting and fixing a rotating shaft, the radial outer portion of the rotating shaft hole is a disk portion, the disk portion of the rotor disk is uniformly provided with a plurality of steel magnet grooves 6, the steel magnet groove runs through the two side surfaces of the rotor disk, the steel magnet groove is in a symmetrical fan shape, the symmetric line of the fan shape passes through the center of circle of the rotor disk, the two sides of the steel magnet are straight edges, and the intersection of extension lines of the straight edges is located on the axis of the rotor disk. A spoke 15 is disposed between the fan-shaped steel magnet grooves on the disk portion, the width of the spoke is of a varying structure, the width of the spoke in the position having a large diameter of the disk portion is greater than the width of the spoke in the position having a small diameter, and the thickness of the spoke is equal to the thickness of the disk portion. The steel magnet groove is of a closed structure, the outer diameter end of the steel magnet groove is an outer spoke edge 17, the outer spoke edge is curved in an arc shape, the outer spoke edge is of an equal thickness structure, the width of the outer spoke edge is equal to the thickness of the disk portion, and the middle position of the outer spoke edge is provided with a radial circular hole. The position of the disk portion corresponding to the inner diameter end of the steel magnet groove is provided with an operating hole 16, the operating hole runs through the two side surfaces of the disk portion, an inner spoke edge is formed between the operating hole and the steel magnet groove, the inner spoke edge is arc-shaped, the thickness of the inner spoke edge is less than the thickness of the outer spoke edge, and the middle position of the inner spoke edge is provided with a radial circular hole. In this embodiment, there is one circular hole on the outer spoke edge, there is one circular hole on the inner spoke edge, the corresponding circular holes on the inner diameter end and the outer diameter end of the same steel magnet groove are on the same radius of the disk portion, and the inner spoke edge and the outer spoke edge are equivalent to the inner connecting edge and the outer connecting edge in Embodiment 1.
A steel magnet 2 is disposed in the steel magnet groove, and the thickness of the steel magnet is equal to the thickness of the steel magnet groove; after the steel magnet is put in, the two surfaces of the steel magnet are exposed, and the two exposed surfaces are flush with the two surfaces of the disk portion, the steel magnet is fan-shaped, the two sides of the steel magnet are straight edges, the inner diameter end of the steel magnet is fixed to the inner spoke edge through an inner fixing member 5, and the outer diameter end of the steel magnet is fixed to the outer spoke edge through an outer fixing member 3; and after the steel magnet is fixed, the straight edges on the two sides of the steel magnet are attached to the straight edges on the two sides of the steel magnet groove. The inner diameter end of the steel magnet is provided with an inner tenon 12 having a rectangular cross section, the outer diameter end of the steel magnet is provided with an outer tenon 9 having a rectangular cross section, the thickness of the inner tenon and the thickness of the outer tenon are equal and are respectively less than 1/2 of the thickness of the steel magnet, and the inner tenon and the outer tenon are located on the central plane of the steel magnet. The end surface of the inner tenon is in a concave arc shape, and the end surface of the outer tenon is in a convex arc shape.
The inner fixing member is provided with an inner tenon groove 13, the inner fixing member is in a groove shape on the whole, the surface of the opening of the inner tenon groove is convex, the outer fixing member is provided with an outer tenon groove 11, the outer fixing member is in a groove shape on the whole, and the surface of the opening of the outer tenon groove is concave. The middle of the inner fixing member is provided with a threaded hole, the threaded hole perpendicularly runs through the bottom of the inner tenon groove, the middle of the outer fixing member is provided with a threaded hole, and the threaded hole perpendicularly runs through the bottom of the outer tenon bottom. The shape of the inner tenon groove of the inner fixing member is matched with that of the inner tenon of the steel magnet, and the shape of the outer tenon groove of the outer fixing member is matched with that of the outer tenon of the steel magnet. The shape of the inner fixing member in the longitudinal direction is matched with the shape of the inner diameter end of the steel magnet groove, and the shape of the outer fixing member in the longitudinal direction is matched with the shape of the outer diameter end of the steel magnet groove. The radial length of the two ends of the steel magnet after connecting the inner fixing member and the outer fixing member is equal to the radial length of the steel magnet groove.
After the inner tenon and the outer tenon of the two ends of the steel magnet are respectively connected with the inner fixing member and the outer fixing member, the steel magnet is put into the steel magnet groove, the threaded hole of the inner fixing member is aligned with the circular hole of the inner spoke edge and is connected and fixed by a screw, and the threaded hole of the outer fixing member is aligned with the circular hole of the outer spoke edge and is connected and fixed by a screw.
Embodiment 3: a steel magnet fixing structure of a disk motor (referring to FIG. 9) differs from the two above embodiments in that: the disk portion of the rotor disk is provided with a steel magnet groove 6, the steel magnet groove has a groove bottom to form a non-through single-side closed structure, the inner diameter portion of the groove bottom forms an inner connecting edge 8, the outer diameter portion of the groove bottom forms an outer connecting edge 7, the thickness of the inner connecting edge and thickness of the outer connecting edge are respectively equal to the thickness of the groove bottom, the position of the rotor disk corresponding to the inner connecting edge forms an inner limit step, the two radial ends of the steel magnet are respectively provided with an inner tenon 12 and an outer tenon 9, the inner fixing member and the outer fixing member are of a groove-shaped structure, the inner fixing member is provided with an inner tenon groove, the outer fixing member is provided with an outer tenon groove, the inner tenon is inserted into the inner tenon groove, and the outer tenon is inserted into the outer tenon groove. The inner connecting edge and the outer connecting edge are respectively provided with a threaded hole, the threaded hole is parallel to the axial line of the rotor disk, the inner fixing member is provided with a circular hole, and the outer fixing member is provided with a circular hole; and when the inner fixing member and the outer fixing member are fixed to the rotor disk, the inner fixing member abuts against the inner limit step, the circular hole of the inner fixing member is coaxial with the corresponding threaded hole and is fixed by a screw, and the circular hole of the outer fixing member is coaxial with the corresponding threaded hole and is fixed by a screw. Refer to Embodiment 1 or Embodiment 2 for the rest of the structure.
Embodiment 4: a steel magnet fixing structure of a disk motor (referring to FIG. 10) differs from Embodiment 3 in that: the thickness of the inner connecting edge and the thickness of the outer connecting edge are respectively greater than the thickness of the groove bottom, an inner limit step is formed between the inner connecting edge and the groove bottom, an outer limit step 18 is formed between the outer connecting edge and the groove bottom, the inner fixing member and the outer fixing member are of a plate structure, the radial length of the inner fixing member is greater than the radial length of the inner connecting edge with an inner tenon groove formed at the inner limit step, and the radial length of the outer fixing member is greater than the radial length of the outer connecting edge with an outer tenon groove formed at the outer limit step. The inner diameter end and the outer diameter end of the steel magnet are respectively provided with a convex inner tenon and a convex outer tenon, the inner tenon and the outer tenon are of a biased structure relative to the central plane of the steel magnet, that is, the inner tenon and the outer tenon are flush with one side surface attached to the groove bottom of the steel magnet, and the thickness of the inner tenon and the thickness of the outer tenon are consistent with the height of the inner limit step and the outer limit step. Refer to Embodiment 3 for the rest of the structure.
Embodiment 5: a steel magnet fixing structure of a disk motor (referring to FIG. 11) differs from Embodiment 1 in that: the steel magnet groove has a groove bottom to form a non-through single-side closed structure, the portions of the rotor disk corresponding to the inner diameter and the outer diameter of the groove bottom respectively form an inner connecting edge and an outer connecting edge, the thickness of the inner connecting edge and the thickness of the outer connecting edge are equal and are respectively greater than the thickness of the groove bottom, the portions with varying thickness respectively form an inner limit step and an outer limit step, the two radial ends of the steel magnet are respectively provided with an inner tenon and an outer tenon, the thickness of the steel magnet is equal to the thickness of the steel magnet groove, the two radial ends of the steel magnet are fixed in the steel magnet groove through the inner fixing member and the outer fixing member, only one exposed surface is formed, and the exposed surface is flush with the surface of the rotor disk corresponding to the opening of the steel magnet groove. The radial cross section of the inner fixing member is h-shaped and has two thicknesses, the portion having a small thickness overlaps and is matched with the inner connecting edge and is fixed and connected by a screw, the thickness of the portion having a large thickness is equal to the thickness of the steel magnet groove, the end of the portion is provided with an inner tenon groove, and the inner tenon is inserted into the inner tenon groove. The radial cross section of the outer fixing member is h-shaped and has two thicknesses, the portion having a small thickness overlaps and is matched with the outer connecting edge and is fixed and connected by a screw, the thickness of the portion having a large thickness is equal to the thickness of the steel magnet groove, the end of the portion is provided with an outer tenon groove, and the outer tenon is inserted into the outer tenon groove. Refer to Embodiment 1 for the rest of the structure.
Embodiment 6: a steel magnet fixing structure of a disk motor (referring to FIG. 12) differs from Embodiment 5 in that: the inner diameter end of the steel magnet is provided with an inner tenon groove, the outer diameter end of the steel magnet is provided with an outer tenon groove, the inner fixing member is provided with an inner tenon, and the outer fixing member is provided with an outer tenon. Refer to Embodiment 5 for the rest of the structure.
Embodiment 7: a steel magnet fixing structure of a disk motor differs from the above embodiments in that: the fixing members on the two ends of the steel magnet are integrally molded with the steel magnet, so the steel magnet is processed well; and the steel magnet is put into a casting mold, a space for casting is left on both ends of the steel magnet, injection molding is performed into the space on the two sides of the steel magnet after the steel magnet is fixed, and the inner fixing member and the outer fixing member are directly injection-molded with the steel magnet. Refer to the other embodiments for the rest of the structure.
The above description is only a few preferred embodiments of the present invention, and is not intended to limit the present invention. Any simple modification, change, and equivalent variation of the above embodiments in accordance with the technical spirit of the present invention still within the protection scope of the technical solutions of the present invention.
Claims
Claims (10)
1. A steel magnet fixing structure of a disk motor, characterized by comprising a rotor disk with a rotating shaft hole in the middle, wherein the rotor disk is provided, in the circumferential direction, with a plurality of fan-shaped-structure steel magnet grooves for mounting steel magnets, two radial ends of the steel magnet are fixed in the steel magnet groove by fixing members and at least one surface is exposed, and the exposed surface of the steel magnet is flush with the surface of the opening of the steel magnet groove on the rotor disk.
2. The steel magnet fixing structure of the disk motor according to claim 1, characterized in that two side edges of the steel magnet groove are straight edges, the steel magnet is fan-shaped, two side edges of the steel magnet are straight edges, the steel magnet is fixed in the steel magnet groove, and the straight edges are attached to each other.
3. The steel magnet fixing structure of the disk motor according to claim 1, characterized in that the fixing members are integrally molded with the two radial ends of the steel magnet; or the fixing member is divided into an inner fixing member and an outer fixing member, the inner fixing member fixes the inner diameter end of the steel magnet, the outer fixing member fixes the outer diameter end of the steel magnet, and the inner fixing member and outer fixing member are connected to the inner diameter end and the outer diameter end of the steel magnet in a tenon-and-mortise manner.
4. The steel magnet fixing structure of the disk motor according to claim 3, characterized in that the two radial ends of the steel magnet are respectively provided with an inner tenon and an outer tenon, the inner fixing member and the outer fixing member are respectively provided with an inner tenon groove and an outer tenon groove, the inner tenon is matched with the inner tenon groove, and the outer tenon is matched with the outer tenon groove; or, the two radial ends of the steel magnet are respectively provided with an inner tenon groove and an outer tenon groove, the inner fixing member and the outer fixing member are respectively provided with an inner tenon and an outer tenon, the inner tenon is matched with the inner tenon groove, and the outer tenon is matched with the outer tenon groove.
5. The steel magnet fixing structure of the disk motor according to claim 3, characterized in that the two radial ends of the steel magnet are respectively provided with an inner tenon and an outer tenon, the inner fixing member and the outer fixing member are fixed to the rotor disk to form an inner tenon groove and an outer tenon groove, the inner tenon is matched with the inner tenon groove, and the outer tenon is matched with the outer tenon groove.
6. The steel magnet fixing structure of the disk motor according to claim 1, characterized in that the inner diameter end of the steel magnet groove is provided with an inner connecting edge, the outer diameter end of the steel magnet groove is provided with an outer connecting edge, and the two fixing members are respectively fixed on the inner connecting edge and the outer connecting edge.
7. The steel magnet fixing structure of the disk motor according to claim 1, characterized in that the inner diameter end of the steel magnet groove is arc-shaped, the outer diameter end of the steel magnet groove is arc-shaped, spaced spokes are formed among the steel magnet grooves, and the spoke has an equal-width structure or a gradually widening structure with a narrow inside and a wide outside.
8. The steel magnet fixing structure of the disk motor according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, characterized in that the steel magnet groove is of a through structure, that is, the steel magnet groove runs through the two side surfaces of the rotor disk, and after the steel magnet is fixed by two fixing members, the two side surfaces of the steel magnet are flush with the two side surfaces of the rotor disk.
9. The steel magnet fixing structure of the disk motor according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, characterized in that the steel magnet groove has a groove bottom to form a single-side closed structure, and after the steel magnet is fixed by two fixing members, one side surface of the steel magnet is attached to the groove bottom surface, and the other side surface of the steel magnet is flush with the plane of the opening of the steel magnet slot of the rotor disk.
10. The steel magnet fixing structure of the disk motor according to claim 9, characterized in that a portion of the rotor disk corresponding to the outer diameter end of the steel magnet groove is provided with an outer limit step.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017107763322 | 2017-08-31 | ||
| CN201710776332.2A CN107492962A (en) | 2017-08-31 | 2017-08-31 | A kind of magnetic steel fixed structure of disc type electric machine |
| PCT/CN2017/107250 WO2019041492A1 (en) | 2017-08-31 | 2017-10-23 | Steel magnet fixation structure of disc motor and fixing technique of steel magnets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2017396544A1 true AU2017396544A1 (en) | 2019-03-14 |
Family
ID=60650941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2017396544A Abandoned AU2017396544A1 (en) | 2017-08-31 | 2017-10-23 | Steel magnet fixing structure of disk motor |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN107492962A (en) |
| AU (1) | AU2017396544A1 (en) |
| WO (1) | WO2019041492A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108134465B (en) * | 2018-03-06 | 2021-05-25 | 珠海凯邦电机制造有限公司 | Permanent magnet rotor and permanent magnet motor |
| CN109038894B (en) * | 2018-08-31 | 2020-07-03 | 浙江盘毂动力科技有限公司 | Disc type rotor structure and disc type motor |
| CN110855042B (en) * | 2019-12-04 | 2024-06-14 | 广东沃顿科技有限公司 | Fixing structure for magnetic steel and rotating shaft of inner rotor motor |
| CN110900088A (en) * | 2019-12-26 | 2020-03-24 | 上海电气集团上海电机厂有限公司 | Motor base batten welding tool and welding method |
| CN113131646A (en) * | 2020-01-13 | 2021-07-16 | 上海盘毂动力科技股份有限公司 | Magnetic steel positioning structure, motor and mounting tool of magnetic steel positioning structure |
| CN111181337B (en) * | 2020-02-26 | 2021-12-21 | 安徽美芝精密制造有限公司 | Rotor assembly, assembling method thereof, motor and electric vehicle |
| DE102021002942A1 (en) | 2021-06-09 | 2022-12-15 | Mercedes-Benz Group AG | Process for producing a permanent magnet for an electrical machine, permanent magnet and use of a permanent magnet |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2337365T3 (en) * | 2005-04-22 | 2010-04-23 | Infranor Holding S.A. | PERMANENT MAGNET FIXING SYSTEM. |
| GB0800225D0 (en) * | 2008-01-07 | 2008-02-13 | Evo Electric Ltd | A rotor for an electrical machine |
| US8049389B2 (en) * | 2008-06-02 | 2011-11-01 | Honda Motor Co., Ltd. | Axial gap motor |
| JP2010148308A (en) * | 2008-12-22 | 2010-07-01 | Daikin Ind Ltd | Field element and manufacturing method of the same |
| CN102624114A (en) * | 2012-02-29 | 2012-08-01 | 腾达电动科技镇江有限公司 | Disc type motor rotor |
| CN202721588U (en) * | 2012-08-02 | 2013-02-06 | 深圳市瀚美特科技有限公司 | Disc type permanent magnet brushless direct current motor with iron core-free and sensor-free properties |
| DE202013006718U1 (en) * | 2013-07-26 | 2013-08-20 | Klaus-Dieter Nies | Rotor for a machine shaft of an electric axial flux machine |
| CN104518641A (en) * | 2013-09-30 | 2015-04-15 | 中达电通股份有限公司 | Permanent magnetic speed regulating coupling |
| CN106233581A (en) * | 2014-02-03 | 2016-12-14 | 坎里格钻探技术有限公司 | The connection of permanent magnet in motor |
| FR3031848B1 (en) * | 2015-01-19 | 2018-03-16 | Whylot | ROTOR FOR ELECTROMAGNETIC MACHINE WITH FLUX AXIAL ROTATING AT HIGH ROTATION SPEEDS AND ELECTROMAGNETIC MACHINE EQUIPPED WITH SUCH A ROTOR |
| CN204578231U (en) * | 2015-03-05 | 2015-08-19 | 腾达电动科技镇江有限公司 | Permanent magnet machine rotor |
| CN105141060A (en) * | 2015-10-21 | 2015-12-09 | 沈阳工业大学 | Axial flux permanent magnet synchronous motor rotor |
| CN205304434U (en) * | 2015-12-28 | 2016-06-08 | 常州雷利电机科技有限公司 | Rotor structure and use this rotor structure's motor for pump |
| CN206259832U (en) * | 2016-12-26 | 2017-06-16 | 重庆市渝展电气有限公司 | Disk permanent magnet generator |
| CN207200410U (en) * | 2017-08-31 | 2018-04-06 | 杭州中豪电动科技股份有限公司 | A kind of rotor magnetic steel fixed structure of disc type electric machine |
-
2017
- 2017-08-31 CN CN201710776332.2A patent/CN107492962A/en active Pending
- 2017-10-23 AU AU2017396544A patent/AU2017396544A1/en not_active Abandoned
- 2017-10-23 WO PCT/CN2017/107250 patent/WO2019041492A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019041492A1 (en) | 2019-03-07 |
| CN107492962A (en) | 2017-12-19 |
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| Date | Code | Title | Description |
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| MK5 | Application lapsed section 142(2)(e) - patent request and compl. specification not accepted |