Axial motor and rotor thereof

Abstract

The utility model discloses an axial motor rotor, which comprises a retainer, a plurality of magnetic conductive blocks, a plurality of magnetic steels and a metal fixing ring block, the plurality of magnetic conductive blocks are circumferentially wound on the retainer, the plurality of magnetic steels are circumferentially wound on the retainer, and the magnetic steels and the magnetic conductive blocks are arranged at intervals; the fixed ring block is pressed on the outer edges of the magnetic conductive block and the magnetic steel, and the fixed ring block is connected to the holder through a connecting piece; the number of the fixing ring blocks is multiple, each fixing ring block at least limits one magnetic steel and one magnetic conductive block, and a gap is formed between every two adjacent fixing ring blocks. The axial motor rotor can bear large centrifugal force, is convenient to assemble, and improves the power density of a motor. The utility model also provides an axial motor.

Description

Technical Field

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

[0002] A motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. Its primary function is to generate driving torque, serving as a power source for electrical appliances and various machines. A motor consists of a stator and a rotor. The stator is the electrically powered, stationary part, primarily composed of a stator core and stator windings. The stator's function is to generate a rotating magnetic field, which causes the rotor to be cut by magnetic lines of force within the magnetic field, generating current. Motors can be categorized as radial-field motors or axial-field motors. Axial-field motors are also called axial motors.

[0003] For axial motors with single stator and single rotor or single stator and dual rotor structures, the motor rotor has a back iron, and the magnet can be fixed to the back iron by means of a pressure plate or the like. However, for motors with dual stators and single rotor structures, the rotor usually does not have a back iron, and some motors with dual stators and single rotors have a back iron. The back iron setting will generate eddy current loss and reduce the efficiency of the motor. The rotor structure of the dual stator and single rotor axial motor in the prior art is as follows: Figure 1 As shown, the magnet 02 is inserted into the retainer 01, and the outer diameter of the retainer 01 is restricted by the carbon fiber ring 03, wherein the magnet 02, the retainer 01 and the carbon fiber ring 03 are all coated with insulating glue.

[0004] In existing technology, carbon fiber rings 03 are difficult to assemble and can easily break during assembly. Higher motor speeds increase motor power. With current rotor structures, larger motor diameters and higher speeds increase the risk of carbon fiber rings 03 breaking, impacting safe and reliable motor operation while limiting power density. Utility Model Content

[0005] In view of this, the utility model provides an axial motor rotor, which can withstand greater centrifugal force, is easy to assemble, and improves the power density of the motor.

[0006] The utility model also provides an axial motor.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] An axial motor rotor, comprising:

[0009] Cage;

[0010] A plurality of magnetic conductive blocks are circumferentially arranged around the retaining frame;

[0011] A plurality of magnetic steels are circumferentially arranged around the retaining frame and spaced apart from the magnetic conductive blocks;

[0012] A fixed ring block made of metal is pressed onto the outer edges of the magnetic conductive block and the magnetic steel, and the fixed ring block is connected to the retaining frame via a connecting piece;

[0013] There are a plurality of fixed ring blocks, each of which limits at least one magnetic steel and one magnetic conductive block, and gaps are provided between adjacent fixed ring blocks.

[0014] Optionally, the retaining frame includes a main disk body and retaining arms connected together, and a plurality of retaining arms are provided, and the plurality of retaining arms are evenly distributed around the circumference of the main disk body, and the magnetic block and the magnetic steel are provided in the gap between two adjacent retaining arms.

[0015] Optionally, a first limiting structure is provided on a side of the magnetic conductive block close to the holding arm connected thereto, and a second limiting structure is provided on a side of the holding arm close to the magnetic conductive block, and the first limiting structure and the second limiting structure are provided in coordination;

[0016] A third limiting structure is provided on the side of the magnetic steel close to the retaining arm connected thereto, and a fourth limiting structure is provided on the side of the retaining arm close to the magnetic steel. The third limiting structure and the fourth limiting structure are arranged in coordination.

[0017] Optionally, one of the first limiting structure and the second limiting structure is a first sliding groove, and the other is a first sliding block, and the first sliding block is slidably connected in the first sliding groove;

[0018] One of the third limiting structure and the fourth limiting structure is a second sliding groove, and the other is a second sliding block, and the second sliding block is slidably connected in the second sliding groove.

[0019] Optionally, a first connecting threaded hole is provided at the end of the retaining arm away from the main disk body, and a first connecting through hole is provided on the fixing ring block. The fixing ring block is connected to the first connecting threaded hole through a connecting piece passing through the first connecting through hole. One end of the fixing ring block is crimped onto the magnetic conductive block, and the other end is crimped onto the adjacent magnetic steel.

[0020] Optionally, the width of the retaining arm at one end close to the main tray body is greater than the width of the retaining arm at one end away from the main tray body.

[0021] Optionally, eight magnetic conductive blocks and eight magnetic steels are provided, and sixteen fixed ring blocks are provided.

[0022] Optionally, the retaining frame includes a main disk body, a second connecting threaded hole is provided on an outer edge side surface of the main disk body, the second connecting threaded hole is arranged along the radial direction of the main disk body, the magnetic conductive block is provided with a second connecting through hole along the radial direction, the second connecting through hole is arranged corresponding to the second connecting threaded hole, and a third connecting through hole is provided on the fixing ring block, the connecting member passes through the third connecting through hole and the second connecting through hole and is connected to the second connecting threaded hole;

[0023] One end of the fixing ring block is pressed onto the magnetic steel adjacent to one side of the magnetic conductive block, and the other end is pressed onto the magnetic steel adjacent to the other side of the magnetic conductive block.

[0024] Optionally, a connecting rubber block is provided in the gap between the adjacent magnetic conductive blocks and the magnetic steel.

[0025] It can be seen from the above technical solution that the axial motor rotor provided by the utility model has a salient pole structure in which the magnetic steel and the magnetic conductive blocks are alternately arranged, which can enhance the weak magnetic performance of the motor and reduce the temperature rise of the rotor under high-speed conditions. The fixed ring block is made of metal material to ensure that the rotor can withstand a large centrifugal force when rotating at high speed, is not easily damaged, and has a longer service life. At the same time, it is required to have a gap between adjacent fixed ring blocks to avoid the problem of large eddy currents generated in the fixed ring blocks during the operation of the motor, resulting in excessive eddy current losses. The fixed ring blocks are made of metal and are connected by connectors, so that the rotor disk can withstand greater centrifugal force. The same outer diameter motor can make the peak speed of the motor higher. The increase in peak speed will increase the power density of the motor. Since the fixed ring blocks are connected by connectors, the rotor is easy to assemble, the assembly difficulty is reduced, and it is not easy to be damaged during the assembly process.

[0026] The utility model also provides an axial motor, comprising a rotor and a stator, wherein the rotor is the above-mentioned axial motor rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 Schematic diagram of the rotor structure of an axial motor in the prior art;

[0029] Figure 2 A schematic structural diagram of an axial motor rotor provided in one embodiment of the present invention;

[0030] Figure 3 for Figure 2A schematic structural diagram of a retainer in an embodiment;

[0031] Figure 4 for Figure 2 A schematic diagram of the arrangement structure of the magnetic steel in the embodiment;

[0032] Figure 5 for Figure 2 A schematic diagram of the arrangement structure of the magnetic conductive blocks in the embodiment;

[0033] Figure 6 for Figure 2 A schematic diagram of the structure of the connection between the fixing ring block and the screws in the embodiment;

[0034] Figure 7 A schematic structural diagram of an axial motor rotor provided by another embodiment of the present invention;

[0035] Figure 8 for Figure 7 A schematic structural diagram of a retainer in an embodiment;

[0036] Figure 9 for Figure 7 A schematic diagram of the arrangement structure of the magnetic steel in the embodiment;

[0037] Figure 10 for Figure 7 A schematic diagram of the arrangement structure of the magnetic conductive blocks in the embodiment;

[0038] Figure 11 for Figure 7 Schematic diagram of the structure of the fixed ring block connected to the screws in the embodiment.

[0039] in:

[0040] 01. Cage, 02. Magnet, 03. Carbon fiber ring,

[0041] 1. Cage,

[0042] 101. Main disk body, 102. Holding arm, 103. Second limiting structure, 104. First connecting threaded hole, 105. Fourth limiting structure, 106. Second connecting threaded hole,

[0043] 2. Magnetic steel,

[0044] 201. The third limiting structure,

[0045] 3. Magnetic block,

[0046] 301, first limiting structure, 302, second connecting through hole,

[0047] 4. Fixed ring block,

[0048] 5. Connectors. DETAILED DESCRIPTION

[0049] The utility model discloses an axial motor rotor, which can withstand greater centrifugal force, is easy to assemble, and improves the power density of the motor.

[0050] The utility model also discloses an axial motor.

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0052] Reference Figures 2 to 11 The axial motor rotor of the present invention includes a retaining frame 1, magnetic blocks 3, magnets 2, and a fixed ring block 4. A plurality of magnetic blocks 3 are provided, and the plurality of magnetic blocks 3 are circumferentially arranged around the retaining frame 1. A plurality of magnets 2 are provided, and the plurality of magnets 2 are circumferentially arranged around the retaining frame 1. The magnets 2 and the magnetic blocks 3 are spaced apart from each other, with a magnetic block 3 provided between every two magnets 2. The fixed ring block 4 is pressed onto the outer edges of the magnetic blocks 3 and magnets 2 and is connected to the retaining frame 1 via a connector 5.

[0053] There are several fixed ring blocks 4, each of which limits the position of at least one magnet 2 and one magnetic conductive block 3. A gap is provided between adjacent fixed ring blocks 4. The outer edge of the magnetic conductive block 3 and the magnet 2 refers to the side of each that is away from the center of the retaining frame 1. The magnetic conductive block 3 is made of a material with good magnetic conductivity. The fixed ring blocks 4 are made of metal.

[0054] In the axial motor rotor of the present invention, the magnets 2 and the magnetic blocks 3 are alternately arranged to form a salient pole structure, which can enhance the weak magnetic performance of the motor and reduce the temperature rise of the rotor under high-speed conditions. The fixed ring block 4 is made of metal material to ensure that the rotor can withstand a large centrifugal force when rotating at high speed, is not easily damaged, and has a longer service life. At the same time, it is required that a gap be provided between adjacent fixed ring blocks 4 to avoid the problem of large eddy currents generated in the fixed ring blocks 4 during the operation of the motor, resulting in excessive eddy current losses. The fixed ring block 4 is made of metal and is connected by a connector 5, so that the rotor disk can withstand greater centrifugal force. The same outer diameter motor can make the peak speed of the motor higher. The increase in peak speed will increase the power density of the motor. Since the fixed ring block 4 is connected with a connector 5, the rotor is easy to assemble, the assembly difficulty is reduced, and it is not easy to be damaged during the assembly process.

[0055] In one embodiment, referring to Figures 2 to 6The retaining frame 1 includes a main plate body 101 and a retaining arm 102 connected together. Figure 3 As shown, a plurality of retaining arms 102 are provided, and the plurality of retaining arms 102 are evenly distributed around the circumference of the main disk body 101 , and gaps are formed between adjacent retaining arms 102 , and the magnetic block 3 and the magnetic steel 2 are provided in the gap between two adjacent retaining arms 102 .

[0056] In order to limit the magnetic block 3 axially, a first limiting structure 301 is provided on the side of the magnetic block 3 close to the retaining arm 102 connected thereto, and a second limiting structure 103 is provided on the side of the retaining arm 102 close to the magnetic block 3. The first limiting structure 301 and the second limiting structure 103 are arranged in coordination. Specifically, the first limiting structure 301 is a first slide groove, and the second limiting structure 103 is a first slider, which is slidably connected in the first slide groove. The first slider extends along the length direction of the retaining arm 102, and the first slider is connected in the first slide groove to limit the circumferential direction of the magnetic block 3. The fixed ring block 4 is used to limit the radial direction of the magnetic block 3.

[0057] In order to limit the axial position of the magnet 2, a third limiting structure 201 is provided on the side of the magnet 2 near the retaining arm 102 connected thereto, and a fourth limiting structure 105 is provided on the side of the retaining arm 102 near the magnet 2. The third limiting structure 201 and the fourth limiting structure 105 are arranged in coordination. Specifically, the third limiting structure 201 is a second slide groove, and the fourth limiting structure 105 is a second slider, and the second slider is slidably connected in the second slide groove. The second slider extends along the length direction of the retaining arm 102, and the second slider is connected in the second slide groove to achieve circumferential positioning of the magnet 2. The fixed ring block 4 is used to limit the radial position of the magnet 2, thereby achieving reliable positioning of the magnet 2. In other embodiments, the third limiting structure 201 can also be a slider structure, and correspondingly, the fourth limiting structure 105 can also be a slide groove structure, which is not limited here.

[0058] In order to facilitate the positioning of the fixed ring block 4, the end of the retaining arm 102 away from the main plate body 101 is provided with a first connecting threaded hole 104, such as Figure 3 As shown, in order to improve the connection strength, the first connecting threaded hole 104 is set at the center position of the end face of the retaining arm 102. In order to facilitate the connection, a first connecting through hole is set on the fixing ring block 4, and the fixing ring block 4 is connected to the first connecting threaded hole 104 through a connecting member 5 passing through the first connecting through hole. Among them, one end of the fixing ring block 4 is crimped on the magnetic conductive block 3, and the other end is crimped on the adjacent magnetic steel 2. In order to prevent the head end of the connecting member 5 from protruding, a groove structure with a corresponding structure is set at the position corresponding to the head end of the first connecting through hole and the connecting member 5. Furthermore, the connecting member 5 is a connecting screw.

[0059] The width of the end of the holding arm 102 close to the main disk body 101 is greater than the width of the end away from the main disk body 101 , thereby improving the structural strength of the holding arm 102 .

[0060] In one embodiment, eight magnetic conductive blocks 3 and eight magnetic steels 2 are provided, and the eight magnetic conductive blocks 3 are spaced apart from the eight magnetic steels 2. Sixteen fixed ring blocks 4 are provided. Accordingly, sixteen retaining arms 102 are provided, and each retaining arm 102 is connected to a fixed ring block 4. The fixed ring block 4 is made of metal.

[0061] In the above embodiment, the magnets 2 and magnetic blocks 3 are alternately arranged in the rotor disk, forming a salient-pole rotor structure. The ratio of the magnets 2 to the magnetic blocks 3 can be optimized to achieve optimal motor performance. The magnets 2 and magnetic blocks 3 are separated circumferentially by the retaining arms 102 of the retainer 1. Axially, the magnets 2 and magnetic blocks 3 are positioned by a matching slide-slide mechanism. In the radial direction, they are secured by a retaining ring 4 and a connector 5.

[0062] In another embodiment, referring to Figures 7 to 11 The retainer 1 includes a main plate body 101, and a second connecting threaded hole 106 is provided on the outer edge side of the main plate body 101. The second connecting threaded hole 106 is provided along the radial direction of the main plate body 101. Figure 8 As shown. In order to facilitate connection, the magnetic block 3 is provided with a second connecting through hole 302 in the radial direction, and the second connecting through hole 302 passes through the magnetic block 3. It can be understood that the second connecting through hole 302 is provided corresponding to the second connecting threaded hole 106. A third connecting through hole is provided on the fixed ring block 4, and the connecting member 5 is connected to the second connecting threaded hole 106 after passing through the third connecting through hole and the second connecting through hole 302. One end of the fixed ring block 4 is crimped onto the adjacent magnetic steel 2 on one side of the magnetic block 3, and the other end is crimped onto the adjacent magnetic steel 2 on the other side of the magnetic block 3. In this embodiment, the other structures of the magnetic block 3 and the magnetic steel 2 refer to the previous embodiment and will not be repeated here.

[0063] Since the main disk body 101 in this embodiment does not have a circumferential retaining arm 102, to provide circumferential and axial positioning of the magnetic blocks 3 and magnets 2, the gaps between adjacent magnetic blocks 3 and magnets 2 are filled with connecting rubber. In this embodiment, radial positioning is achieved via a retaining ring 4 and a connecting member 5. The connecting member 5 is threaded from the retaining ring 4 into a second threaded connection hole 106 pre-set in the retaining frame 1. The gaps between the retaining frame 1, magnets 2, and magnetic blocks 3 can be filled with rubber to secure the magnets 2 and magnetic blocks 3 circumferentially and axially. Specifically, the connecting member 5 can be a connecting screw. Each magnetic block 3 is provided with at least one connecting screw. In one specific embodiment, eight magnetic blocks 3 and eight magnets 2 are provided, with eight magnetic blocks 3 spaced apart from eight magnets 2. Eight retaining rings 4 are provided. The magnetic blocks 3 are fixedly connected to the retaining frame 1 via screws connected to the retaining ring 4. The number of connecting screws is determined based on actual needs. Each magnetic conductive block 3 is connected to a fixed ring block 4 , and both sides of each magnetic steel 2 are respectively pressed and limited by the ends of the two fixed ring blocks 4 .

[0064] In the axial motor rotor of the present invention, the magnets 2 and the magnetic blocks 3 are arranged alternately. The material of the retaining frame 1 is preferably metal, which is convenient for tapping and the structural strength of the threaded hole is higher. The magnetic blocks 3 are made of materials with good magnetic conductivity, and there are more materials to choose from. The fixing ring block 4 is preferably made of metal material, which is convenient for improving the strength of the fixed structure and improving the structural reliability. The contact parts of the retaining frame 1, the magnets 2, the magnetic blocks 3, and the fixing ring block 4 are coated with glue, which can not only enhance the structural strength but also provide insulation. The axial motor rotor of the present invention has a simple rotor structure and is easy to assemble; the fixing ring block 4 cooperates with the screws to enable the rotor disk to withstand greater centrifugal force, and the motor with the same outer diameter can make the motor peak speed higher, thereby increasing the motor power density; the magnets 2 and the magnetic blocks 3 are alternately arranged to form a salient pole structure, which can enhance the weak magnetic performance of the motor and reduce the rotor temperature rise under high-speed conditions.

[0065] The utility model also provides an axial motor, comprising a rotor and a stator, wherein the rotor is the above-mentioned axial motor rotor.

[0066] In the description of this solution, it should be understood that the terms "upper", "lower", "vertical", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on this solution.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this solution, "plurality" means two or more, unless otherwise specifically defined.

[0068] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0069] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An axial motor rotor, characterized in that: include: Cage; A plurality of magnetic conductive blocks are circumferentially arranged around the retaining frame; A plurality of magnetic steels are circumferentially arranged around the retaining frame and spaced apart from the magnetic conductive blocks; A fixed ring block made of metal is pressed onto the outer edges of the magnetic conductive block and the magnetic steel, and the fixed ring block is connected to the retaining frame via a connecting piece; There are a plurality of fixed ring blocks, each of which limits at least one magnetic steel and one magnetic conductive block, and gaps are provided between adjacent fixed ring blocks.

2. The axial motor rotor according to claim 1, characterized in that The retaining frame includes a main disk body and retaining arms connected together. There are multiple retaining arms, and the multiple retaining arms are evenly distributed around the circumference of the main disk body. The magnetic block and the magnetic steel are arranged in the gap between two adjacent retaining arms.

3. The axial motor rotor according to claim 2, characterized in that: A first limiting structure is provided on the side of the magnetic conductive block close to the holding arm connected thereto, and a second limiting structure is provided on the side of the holding arm close to the magnetic conductive block, wherein the first limiting structure and the second limiting structure are provided in coordination with each other; A third limiting structure is provided on the side of the magnetic steel close to the retaining arm connected thereto, and a fourth limiting structure is provided on the side of the retaining arm close to the magnetic steel. The third limiting structure and the fourth limiting structure are arranged in coordination.

4. The axial motor rotor according to claim 3, characterized in that: One of the first limiting structure and the second limiting structure is a first sliding groove, and the other is a first sliding block, and the first sliding block is slidably connected in the first sliding groove; One of the third limiting structure and the fourth limiting structure is a second sliding groove, and the other is a second sliding block, and the second sliding block is slidably connected in the second sliding groove.

5. The axial motor rotor according to claim 2, characterized in that: A first connecting threaded hole is provided at the end of the retaining arm away from the main disk body, and a first connecting through hole is provided on the fixing ring block. The fixing ring block is connected to the first connecting threaded hole through a connecting piece passing through the first connecting through hole. One end of the fixing ring block is crimped onto the magnetic conductive block, and the other end is crimped onto the adjacent magnetic steel.

6. The axial motor rotor according to claim 2, characterized in that: The width of the retaining arm at one end close to the main tray body is greater than the width of the retaining arm at one end away from the main tray body.

7. The axial motor rotor according to claim 2, characterized in that: There are eight magnetic conductive blocks and eight magnetic steels, and sixteen fixed ring blocks.

8. The axial motor rotor according to claim 1, characterized in that: The retaining frame includes a main disk body, a second connecting threaded hole is provided on the outer edge side surface of the main disk body, the second connecting threaded hole is arranged along the radial direction of the main disk body, the magnetic conductive block is provided with a second connecting through hole along the radial direction, the second connecting through hole is arranged corresponding to the second connecting threaded hole, and a third connecting through hole is provided on the fixing ring block, and the connecting member passes through the third connecting through hole and the second connecting through hole and is connected to the second connecting threaded hole; One end of the fixing ring block is pressed onto the magnetic steel adjacent to one side of the magnetic conductive block, and the other end is pressed onto the magnetic steel adjacent to the other side of the magnetic conductive block.

9. The axial motor rotor according to claim 8, characterized in that: A connecting rubber block is provided in the gap between the adjacent magnetic conductive blocks and the magnetic steel.

10. An axial motor comprising a rotor and a stator, characterized in that: The rotor is the axial motor rotor according to any one of claims 1 to 9.

Images