WO2023010654A1

WO2023010654A1 - Anti-disengaging rotor disc of disc-type motor

Info

Publication number: WO2023010654A1
Application number: PCT/CN2021/118747
Authority: WO
Inventors: 袁峥; 田井呈; 邵熙芳; 黄厚佳; 潘勇生
Original assignee: 浙江盘毂动力科技有限公司
Priority date: 2021-08-05
Filing date: 2021-09-16
Publication date: 2023-02-09
Also published as: CN113541359A; CN113541359B

Abstract

The present application relates to the field of disc-type motors, and in particular, relates to an anti-disengaging rotor disc of a disc-type motor, said rotor disc comprising a holder, a fixed ring, and a plurality of permanent magnets. The holder comprises a frame body and a plurality of support rods, the support rods extending outwards to the circumferential edge of the frame body, and a permanent magnet fixed being fixed between every two adjacent support rods. The fixed ring comprises an inner ring and an outer ring that are made of different materials, the inner ring being an auxiliary ring, the outer ring being a force-bearing ring. The inner ring is fixedly sleeved on the outer circumference of a permanent magnet, and enables the permanent magnet to be fixed between the inner ring and the frame body. The outer ring is sleeved on the exterior of the inner ring. The rotor disc further comprises a connection assembly, the inner ring and the support rods being connected by means of the connection assembly. The present application has the advantages that the fixed ring does not easily fall off due to vibration, magnetic steel is firmly mounted, and the overall structural strength is high.

Description

An anti-off rotor disk of a disk motor

technical field

The present application relates to the field of disk motors, in particular to a fall-off prevention rotor disk of a disk motor.

Background technique

Axial field motors are also called "disk motors", that is, motors with the main magnetic field and the direction along the axis of rotation. Axial field motors are different from ordinary motors in that the direction of the magnetic flux is axial, the current-carrying conductors are placed radially, and the stator and rotor cores are disc structures.

The rotor structure of disc motor can be divided into support disc and permanent magnet. The rotor support disc is used as the installation support of the permanent magnet. The permanent magnet is fixed on the rotor disc by bonding or screw fastening. When the motor works for a long time, the rotor will Magnetic loss and heat generation, the use of bonding may cause the bonding to fail and cause the rotor to fall off; the direct fixing of screws will destroy the structure of the magnet and cause damage to the magnetic circuit, so a sleeve is often placed outside the rotor support plate. The fixing ring is used for fixing the permanent magnet.

In the prior art, the permanent magnet is fixed by a fixing ring, but the fixing ring is made of a single material, which is easy to fall off due to vibration when the rotor rotates at a high speed, thereby causing the permanent magnet to loosen or even fall off from the support plate.

Contents of the invention

In order to reduce the situation that the fixed ring made of a single material falls off due to the vibration generated when the rotor rotates at high speed, the application provides an anti-loosening rotor disk of a disk motor.

The anti-off rotor disc of a disc motor provided by this application adopts the following technical scheme:

An anti-off rotor disc of a disc motor, comprising a cage, a fixed ring and a plurality of permanent magnets, the cage includes a frame body and a plurality of support rods, and the support rods extend outward On the periphery of the frame, a permanent magnet is fixed between two adjacent support rods. The fixed ring includes an inner ring and an outer ring made of different materials. The inner ring is an auxiliary ring. The outer ring is a stressed ring, the inner ring is fixedly sleeved on the outer periphery of the permanent magnet, and the permanent magnet is fixed between the inner ring and the frame body, and the outer ring covers It is arranged on the outer side of the inner ring; the rotor disc further includes a connection assembly, and the inner ring is connected to the support rod through the connection assembly.

Optionally, the connection assembly includes a plurality of connection pieces, one end of the connection piece is fixed to the inner ring, and the other end is clamped to the support rod.

Optionally, a plurality of the connecting elements are sequentially distributed on both axial sides of the rotor at intervals.

Optionally, the connecting piece is welded and fixed to the inner ring.

Optionally, the end of the support rod connected to the inner ring is provided with a locking groove, the receiving groove is exposed on one side of the rotor axial direction, and allows the connecting piece to be inserted into the inner ring along the rotor axial direction. in the holding tank.

Optionally, the inner ring is made of metal material, and the outer ring is wound of carbon fiber material.

Optionally, the outer side of the inner ring is provided with at least one engaging portion engaging the outer ring.

Optionally, a thickness ratio of the inner ring to the outer ring is less than or equal to 1/2.

Optionally, a first limiting portion is respectively provided on both sides of the support rod along the circumferential direction of the rotor, and a second limiting portion that cooperates with the first limiting portion is arranged on the permanent magnet.

Compared with the prior art, this technical solution has the following advantages:

1. In the existing support rod and the inner side of the fixed ring, there is only friction caused by abutment, so the fixed ring is easy to fall off. However, in this application, the inner ring and the support rod are fixed through the connecting piece, that is, the connecting piece and the inner ring are welded and connected. The parts and the support rods are clipped so that the connection between the inner ring and the support rods is firm, so that the fixed ring is not easy to fall off due to the vibration of the rotor at high speed.

2. The fixed ring is divided into an inner ring and an outer ring with different materials. The outer ring is set outside the inner ring with a non-deformable outer ring to limit the deformation of the inner ring. On the one hand, the inner ring is not easy to fall off from the cage due to deformation and vibration. , On the other hand, the permanent magnet is limited by the inner ring and the frame body, so it is not easy to fall off from the cage, so that the permanent magnet is installed firmly.

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Description of drawings

FIG. 1 is a schematic diagram of an embodiment of the present application for embodying the structure of a connector and a receiving tank;

Fig. 2 is a schematic diagram of an embodiment of the present application for embodying the distribution of accommodation tanks;

Fig. 3 is a schematic diagram for embodying the structure of the fixed ring in the embodiment of the present application;

Fig. 4 is a schematic diagram of an embodiment of the present application for embodying a connector;

Fig. 5 is a schematic diagram of the embodiment of the present application for embodying the structure of the permanent magnet and the installation groove;

Fig. 6 is a schematic diagram of the embodiment of the present application for embodying the assembly of the permanent magnet into the installation groove;

Fig. 7 is a schematic diagram for embodying the structure of the permanent magnet according to the embodiment of the present application;

Fig. 8 is a schematic diagram showing the assembly direction of the fixing ring according to the embodiment of the present application;

Fig. 9 is a schematic diagram of the embodiment of the present application to reflect the completion of the assembly of the fixing ring;

Fig. 10 is a schematic diagram of the embodiment of the present application for embodying the structure of the fixing ring and the cage;

Fig. 11 is an axial view of the rotor disc in the embodiment of the present application;

Fig. 12 is a schematic diagram of the embodiment of the present application for embodying the clamping part and the limiting groove;

Fig. 13 is a sectional view of A-A direction in Fig. 12;

Fig. 14 is the sectional view of B-B direction in Fig. 12;

Fig. 15 is a cross-sectional view along C-C in Fig. 12 .

Reference signs: 1, cage; 11, frame body; 12, support rod; 121, installation groove; 122, accommodation groove; 123, first limit part; 2, fixed ring; 21, inner ring; Position groove; 22, outer ring; 221, clamping part; 3, permanent magnet; 31, magnetic steel; 32, second limit part; 4, connecting piece.

Detailed ways

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

The terminology used in the present invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by those skilled in the art to which the present invention belongs. Words such as "one" or "one" used in the description and claims of the present invention do not indicate a limitation on quantity, but mean that there is at least one. "Includes" or "comprises" and similar terms mean that the elements or items listed before "comprises" or "comprises" include the elements or items listed after "comprises" or "comprises" and their equivalents, and do not exclude other elements or objects. Words such as "connected" or "connected" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect. As used in the present specification and appended claims, the singular forms "a", "the" and "the" are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

The present application will be described in further detail below in conjunction with accompanying drawings 1-15.

The embodiment of the present application discloses a detachment-preventing rotor disk of a disk motor.

Referring to FIG. 1 and FIG. 2 , it includes a cage 1 , a fixed ring 2 and a plurality of permanent magnets 3 . The cage 1 includes a frame body 11 and a plurality of support rods 12. The frame body 11 is in the form of a ring, and the support rods 12 are in the shape of a square truss. The rotor extends radially outward, and the number of the multiple permanent magnets 3 is consistent with that of the multiple support rods 12. A fan-shaped installation groove 121 is formed between two adjacent support rods 12, and the permanent magnets 3 correspond to the installation grooves 121 one by one. , each permanent magnet 3 is embedded in the corresponding installation groove 121 . The fixed ring 2 includes an inner ring 21 and an outer ring 22 made of different materials. The inner ring 21 is fixedly sheathed on the outer periphery of the permanent magnet 3 and fixes the permanent magnet 3 between the inner ring 21 and the frame body 11 . The outer ring 22 is coaxially and fixedly sleeved on the outer side of the inner ring 21 and constrains the shape of the inner ring 21 .

The inner ring 21 adopts a material that is easy to process and has high strength. In this embodiment, the inner ring 21 is a metal ring. The metal ring is easy to process but is prone to deformation without special treatment. The inner ring 21 is sleeved with an outer ring 22 that is not easily deformed. The outer side limits the outward deformation of the inner ring 21. The inner ring 21 is fixedly sleeved on the outer periphery of the permanent magnet 3. When the shape of the inner ring 21 does not change, the permanent magnet 3 is limited by the inner ring 21 and the frame body 11. It is not easy to fall off from the cage 1.

The cage 1 can be laminated and formed by glass fiber composite materials. Glass fiber is an inorganic non-metallic material with excellent performance. Good sex and cheap price. Using glass fiber composite material to manufacture the cage 1 helps to reduce the manufacturing difficulty of the cage 1 and reduce the manufacturing cost of the cage 1 . The glass fiber composite material also has the advantage of good dimensional stability, so that the size of the cage 1 hardly changes under different working conditions, thereby reducing the possibility of the permanent magnet 3 getting loose from the cage 1 .

Referring to Fig. 5 and Fig. 7, the permanent magnet 3 can be an alloy permanent magnet or a ferrite permanent magnet. In this embodiment, the permanent magnet 3 is formed by laminating a plurality of magnetic steels 31 along the radial direction of the frame body 11. The magnetic steel 31 The number depends on the thickness of the magnetic steel 31 and the size of the mounting groove 121, and four pieces are preferred in this embodiment.

In use, the staff first assembles the magnetic steel 31 into the installation groove 121 along the radial direction of the frame body 11, then assembles the inner ring 21 to the outer periphery of the permanent magnet 3, fixes the permanent magnet 3, and finally the inner ring 21 is covered An outer ring 22 is provided to constrain the shape of the inner ring 21 .

The inner ring 21 is fixed to the support rod 12 through the connection assembly. The connection assembly includes a plurality of connectors 4. The connectors 4 can be bolts. The bolts correspond to the support rods 12 one by one. The end of the rod 12 far away from the frame body 11 is connected by bolts, which has the advantage of convenient installation, but the disadvantage is that the strength of the inner ring 21 is reduced due to opening holes in the inner ring 21 . Similarly, the connecting piece 4 can be a pin, and the pin penetrates through the inner ring 21 and penetrates into the end of the support rod 12 away from the frame body 11 to form an interference fit.

Referring to Fig. 1 and Fig. 2, in another embodiment of the present application, the end of each support rod 12 away from the frame body 11 abuts against the inner side of the inner ring 21, and the end of the support rod 12 abutting against the inner ring 21 A receiving groove 122 is provided, so that the side of the receiving groove 122 close to the inner side of the inner ring 21 is open, and the receiving groove 122 is also exposed to the axial side of the rotor. The connecting piece 4 is placed and fixed in the receiving groove 122 along the rotor axial direction. The connectors 4 correspond to the receiving grooves 122 one by one. The part of the connectors 4 located in the receiving grooves 122 is glued and fixed to the inner wall of the receiving grooves. In order to facilitate welding and fixing, the receiving groove 122 may be a rectangular groove, and the connecting member 4 may be in the shape of a cuboid matching the receiving groove 122 .

Referring to FIG. 4 , in order to smoothly fit the connecting piece 4 into the receiving groove 122 , the four edges of the connecting piece 4 parallel to the axial direction of the rotor are all rounded.

When the connecting piece 4 abuts against the inner side of the inner ring 21, there is only friction between the connecting piece 4 and the inner ring 21, so the inner ring 21 is easy to fall off, and the inner ring 21 and the support rod 12 are fixed by the connecting piece 4, and the inner ring The connection between 21 and the support rod 12 is firm, and the inner ring 21 is not easy to fall off due to the vibration when the rotor runs at high speed. Moreover, the connecting piece 4 is embedded in the receiving groove 122 instead of embedded in the inner ring 21, which helps to reduce the width of the inner ring 21, and at the same time ensures the flatness of the two axial sides of the rotor disk, thereby ensuring the stability of the rotor disk during rotation , can also reduce the overall thickness of the rotor disk, thereby reducing the volume of the motor, so that the motor can be applied to more scenarios.

Referring to FIG. 1 , the accommodation groove 122 can be opened on any one of the two sides of the support rod 12 in the rotor axial direction, and a plurality of accommodation grooves 122 can all be located on the same side of the support rod 12 in the rotor axial direction, or It can be distributed on both sides of the support rod 12 in the axial direction of the rotor. When the receiving groove 122 is located on the same side of the support rod 12 in the rotor axial direction, the other side of the support rod 12 in the rotor axial direction only abuts against the inside of the inner ring 21, and the space between the support rod 12 and the inner side of the inner ring 21 There is only friction, which is not conducive to fixing the inner ring 21 in the direction of the rotor axial direction. When the receiving grooves 122 are distributed on both sides of the supporting rod 12 in the axial direction of the rotor, the connecting piece 4 can fix the inner ring 21 on the supporting rod 12 on both sides in the axial direction of the rotor, and the connecting piece 4 does not need to be connected with the receiving groove. The inner wall of 122 can be glued and fixed to fix the inner ring 21 and the cage 1, and when the motor is running and vibrating, the connection between the cage 1 and the inner ring 21 has better firmness, thereby reducing the contact between the support rod 12 and the inner ring. The loosening of the fixing of the ring 21 leads to the risk of the magnetic steel 31 falling off from between the inner ring 21 and the outer peripheral edge of the frame body 11 .

Referring to Fig. 5 and Fig. 6, the support rod 12 is respectively provided with a first limiting part 123 on both sides along the circumferential direction of the cage 1, and the permanent magnet 3 is provided with a second limiting part cooperating with the first limiting part 123 32. The function of the first limiting portion 123 and the second limiting portion 32 is to further limit the permanent magnet 3 in the limiting groove 211 . The first limiting portion 123 may be a slot, and the second limiting portion 32 may be a locking block or the first limiting portion 123 may be a locking block, and the second limiting portion 32 may be a locking slot. In this embodiment, the first limiting part 123 is a clamping block, which extends from one end of the support rod 12 to the other end and has a semicircular cross-section. One magnet 3 is respectively formed on both sides along the circumferential direction of the frame body 11 . When the permanent magnet 3 is embedded in the installation groove 121, the two adjacent blocks on the two support rods 12 corresponding to the installation groove 121 are respectively embedded in the two draw-in grooves of the permanent magnet 3 in the installation groove 121, and the blocks and The slots slide and fit along the radial direction of the rotor, which is convenient for workers to assemble the permanent magnets 3 into the installation slots 121 . When the inner ring 21 is sleeved on the outer periphery of the permanent magnet 3, the inner ring 21 restricts the radial movement of the permanent magnet along the frame body 11, and the first stopper 123 and the second stopper 32 can prevent the permanent magnet from moving along the frame. The axial movement of the body 11 optimizes the fixing effect of the permanent magnet 3.

In use, the staff first assembles the permanent magnet 3 into the installation groove 121 through the cooperation of the block and the slot, and then sets the inner ring 21 on the outer periphery of the permanent magnet 3 to limit the permanent magnet 3 along the axial direction of the frame body 11. And radial displacement, thereby reducing the situation that the permanent magnet 3 falls off from the cage 1.

The outer ring 22 includes at least one fiber tow, and the fiber tow is wound outside the inner ring 21 to form the outer ring 22 . The fiber filaments can be carbon fiber filaments, which have the characteristics of high temperature resistance, friction resistance, electrical conductivity, thermal conductivity and corrosion resistance. It has high strength and modulus along the carbon fiber axis.

In another embodiment of the present application, the above-mentioned outer ring 22 is formed by curing the carbon fiber filaments with a curing agent after being wound. When the fiber filaments are carbon fiber filaments, the curing agent is carbon fiber glue. The outer ring 22 is formed by beam curing. After being cured with a curing agent, the outer ring 22 has better mechanical strength, which can better secure the inner ring 21 to fix the permanent magnet 3 .

Referring to Fig. 11 and Fig. 13, the inner side of the outer ring 22 is attached to the outer side of the inner ring 21. In order to make the outer ring 22 and the inner ring 21 more tightly combined and reduce the misalignment between the outer ring 22 and the inner ring 21, At least one engaging portion 221 engaging the outer ring 22 is disposed on the outer side of the inner ring 21 . The clamping part 221 can be a protrusion or a groove of various shapes. In this embodiment, the clamping part 221 is a protrusion, and the carbon fiber filament is wound on the outside of the inner ring 21 and solidified to form a limit corresponding to the shape of the clamping part 221. The positioning groove 211 and the engaging portion 221 are engaged with the limiting groove 211 to reduce misalignment between the inner ring 21 and the outer ring 22 .

Specifically, referring to Fig. 12 and Fig. 14, the clamping part 221 is a protrusion with a semicircular cross section, the clamping part 221 is coaxial with the outer ring 22 and surrounds the outer ring 22 for a week, and the limiting groove 211 is a semicircular groove, limiting The position groove 211 is coaxial with the inner ring 21 and surrounds the inner ring 21 for a circle.

In use, after the staff assembles the inner ring 21, the staff winds the carbon fiber tow outside the inner ring 21, and then adds carbon fiber glue to the carbon fiber tow, so that the carbon fiber tow is solidified, and the clamping part 221 is snapped into the limiting groove 211 .

Since the inner ring 21 mainly plays the role of limiting the displacement of the permanent magnet 3, the thickness of the inner ring 21 can be appropriately reduced, and because the outer ring 22 mainly plays the role of strengthening and protecting the inner ring 21, the thickness of the outer ring 22 can be appropriately increased , the ratio of the thickness of the inner ring 21 to the thickness of the outer ring 22 is less than or equal to 1/2. In this embodiment, the ratio of the thickness of the inner ring 21 to the thickness of the outer ring 22 is equal to 1/2.

In use, the staff can choose the appropriate ratio of the thickness of the inner ring 21 to the thickness of the outer ring 22 according to the design strength, which can not only meet the design requirements, but also save costs.

The implementation principle of this embodiment is: when assembling the rotor disk, the staff first assemble the magnetic steel 31 into the installation groove 121 along the radial direction of the frame body 11, and then assemble the inner ring 21 on the outer periphery of the permanent magnet 3 along the rotor axial direction. edge, fix the permanent magnet 3, and then wind the carbon fiber tow outside the inner ring 21, and add carbon fiber glue to the carbon fiber tow, so that the carbon fiber tow is solidified, and at the same time, the clamping part 221 is snapped into the limiting groove 211, so that the outer The ring 22 constrains the shape of the inner ring 21 , and finally the connecting piece 4 is inserted into the receiving groove 122 , and the connecting piece 4 is welded and fixed to the inner side of the inner ring 21 .

The outer ring 22 cooperates with the inner ring 21 through the clamping part 221 and the limit groove 211, and the inside of the inner ring 21 is fixed with the support rod 12 through the connecting piece 4, which helps to reduce the misalignment between the inner ring 21 and the outer ring 22 1. The inner ring 21 or the outer ring 22 or the fixed ring 2 falls off along the axial direction of the rotor as a whole, thereby reducing the situation that the permanent magnet 3 falls off from the cage 1 .

To sum up, the existing support rod and the inner side of the fixing ring only have friction generated by abutting against each other, so the fixing ring is easy to fall off. However, in this application, the inner ring and the support rod are fixed through the connecting piece, that is, the connecting piece and the inner ring Welding, the connecting piece is clamped with the support rod, so that the connection between the inner ring and the support rod is firm, and the fixed ring is not easy to fall off due to the vibration of the rotor at high speed. The fixed ring is divided into an inner ring and an outer ring with different materials. The outer ring is set outside the inner ring with a non-deformable outer ring to limit the deformation of the inner ring. On the one hand, the inner ring is not easy to fall off the cage due to deformation and vibration. On the one hand, the permanent magnet is limited by the inner ring and the frame body, so it is not easy to fall off from the cage, so that the permanent magnet is installed firmly.

Other embodiments of the present disclosure will be easily conceived by those skilled in the art after considering the description and practicing the technical solutions disclosed herein. The present invention is intended to cover any modification, use or adaptation of the present disclosure, and these modifications, uses or adaptations follow the general principles of the present disclosure and include common knowledge or conventional technical means in the technical field not disclosed in the present disclosure . The specification and examples are to be considered exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It should be understood that the present disclosure is not limited to the precise constructions which have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

An anti-off rotor disk of a disk motor, comprising a cage (1), a fixed ring (2) and a plurality of permanent magnets (3), the cage (1) includes a frame body (11) and A plurality of said support rods (12), said support rods (12) extend outwards on the periphery of said frame body (11), and a said support rod (12) is fixed between adjacent two said support rods (12). Permanent magnet (3), is characterized in that:

The fixed ring (2) includes an inner ring (21) and an outer ring (22) using different materials, the inner ring (21) is an auxiliary ring, the outer ring (22) is a stressed ring, and the inner ring (21) is an auxiliary ring. The ring (21) is fixedly sleeved on the outer periphery of the permanent magnet (3), and the permanent magnet (3) is fixed between the inner ring (21) and the frame (11), so that The outer ring (22) is sleeved on the outer side of the inner ring (21);

The rotor disk also includes a connection assembly, and the inner ring (21) is connected to the support rod (12) through the connection assembly.
The anti-off rotor disk of a disk motor according to claim 1, characterized in that: the connecting assembly includes a plurality of connecting pieces (4), and one end of the connecting piece (4) is connected to the inner ring (21 ) is fixed, and the other end is clamped with the support rod (12).
The anti-off rotor disk of a disk motor according to claim 2, characterized in that: a plurality of the connecting parts (4) are sequentially distributed on both sides of the axial direction of the rotor at intervals.
The anti-off rotor disk of a disk motor according to claim 3, characterized in that: the connecting piece (4) is welded and fixed to the inner ring (21).
The anti-off rotor disk of a disk motor according to claim 2, characterized in that: the end of the support rod (12) connected to the inner ring (21) is provided with a receiving groove (122), the The accommodating groove (122) is exposed on one side of the rotor axial direction, and the connecting piece (4) is snapped into the accommodating groove (122) along the rotor axial direction.
The rotor disk suitable for preventing permanent magnets from falling off in an axial field motor according to claim 1, characterized in that: the inner ring (21) is made of metal material, and the outer ring (22) is wound by carbon fiber material made.
The anti-off rotor disk of a disk motor according to claim 1, characterized in that: the outer side of the inner ring (21) is provided with at least one locking portion (221) that engages the outer ring (22) .
The anti-off rotor disk of a disk motor according to claim 1, characterized in that: the thickness ratio of the inner ring (21) to the outer ring (22) is less than or equal to 1/2.
The anti-off rotor disk of a disk motor according to claim 1, characterized in that: first limiting parts (123) are respectively provided on both sides of the support rod (12) along the circumferential direction of the rotor, and the The permanent magnet (3) is provided with a second limiting portion (32) that cooperates with the first limiting portion (123).