Rotor mechanism of disc type motor

Abstract

The utility model relates to the technical field of motor rotors, and particularly discloses a rotor mechanism of a disc type motor, which comprises a rotating shaft, the outer end of the rotating shaft is sleeved with an inner rotor disc and an outer rotor disc through a rotating shaft connecting assembly, the outer rotor disc is arranged above the inner rotor disc in a covering manner, and the inner rotor disc comprises an inner disc body. A plurality of mounting grooves are formed in the outer side of the upper end face of the inner disc body, magnetic steel is fixed into the mounting grooves through adhesives, the outer rotor disc comprises an outer disc body, a plurality of outer openings are formed in the outer side of the upper end face of the outer disc body, pressing strips are fixed to the two sides of the lower end faces of the outer openings, and each magnetic steel comprises a main body; and grooves are formed in the two sides of the main body. According to the utility model, after the magnetic steel is installed, the magnetic steel is wrapped between the inner rotor disc and the outer rotor disc to form a wrapped installation structure, and the magnetic steel is fixed by adopting two modes of the adhesive and the pressing strip, so that the stability and the reliability of the magnetic steel after installation are higher.

Description

Technical Field

[0001] The utility model relates to the technical field of motor rotors, in particular to a rotor mechanism of a disc-type motor. Background Art

[0002] The disc motor is also called the disc permanent magnet motor. Compared with the traditional motor, the disc motor has the advantages of compact structure, small size, light weight and high efficiency. Therefore, the disc motor is often used in occasions with space requirements, such as automobiles, drones, home appliances and other fields.

[0003] The disc motor is also mainly composed of a rotor and a stator, wherein the magnet of the rotor is installed on the outside of the rotor core. At present, there are two main ways to install the magnet in the disc motor: the pasting method and the mechanical fixing method. The pasting method uses an adhesive to fix the magnet to the outer end of the rotor. This method is simple to implement, but the installation stability is affected by the strength of the adhesive. The high operating temperature of the rotor and the time are likely to cause the adhesive to age, affecting the installation stability of the magnet and reducing the reliability. The mechanical fixing method uses screws, rivets and other mechanical methods to fix the magnet. This method has a firm connection and high reliability, but the screws and rivets need to be drilled when connected, which may cause the risk of magnet damage. Therefore, those skilled in the art provide a rotor mechanism for a disc motor to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to provide a rotor mechanism of a disc motor to solve the following technical problems:

[0005] How to improve the stability of the magnet after installation and prevent damage to the magnet during installation.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A rotor mechanism of a disc motor comprises a rotating shaft, an outer end of the rotating shaft is sleeved with an inner rotor disc and an outer rotor disc through a rotating shaft connecting assembly, and the outer rotor disc cover is arranged above the inner rotor disc;

[0008] The inner rotor disk comprises an inner disk body, a plurality of mounting grooves are formed on the outer side of the upper end surface of the inner disk body, and magnetic steels are fixed inside the plurality of mounting grooves by adhesive;

[0009] The outer rotor disk comprises an outer disk body, a plurality of outer openings are formed on the outer side of the upper end surface of the outer disk body, and pressure strips are fixed on both sides of the lower end surfaces of the plurality of outer openings;

[0010] The magnetic steel comprises a main body, both sides of which are provided with grooves, the lower end of the pressure strip abuts against the groove, and the upper end surface of the main body protrudes outwardly from the opening.

[0011] Furthermore, the rotating shaft connection assembly includes an upper cover plate and a lower cover plate, and the rotating shaft passes through the inner disk body and the outer disk body and is clamped with the inner disk body and the outer disk body;

[0012] Further, the upper cover plate is sleeved on the upper side of the outer end of the rotating shaft, the lower cover plate is sleeved on the lower side of the outer end of the rotating shaft, a plurality of connecting columns penetrating the inner disk body and the outer disk body are fixed on the upper end surface of the lower cover plate, and a plurality of first screws are connected between the upper cover plate and the connecting columns through threads;

[0013] Furthermore, an outer encircling ring is fixed to the outer end of the outer disk, a plurality of outer connecting holes are opened on the surface of the outer encircling ring, and a plurality of inner connecting screw holes are opened on the outer end of the inner disk, and the outer connecting holes correspond to the inner connecting screw holes one by one and are connected with second screws;

[0014] Furthermore, the outer enclosing ring is coated on the outer end of the inner disk;

[0015] Furthermore, the upper end surface of the inner disk body is provided with a positioning groove between the two installation grooves, and the lower end surface of the outer disk body is provided with a positioning column between the two outer openings, and the positioning column is plugged into the positioning groove in a one-to-one correspondence;

[0016] Furthermore, a plurality of first openings are opened on the inner side of the inner disk body around the rotating shaft, and a plurality of second openings are opened on the inner side of the outer disk body around the rotating shaft;

[0017] Further, the inner rotor disc, the outer rotor disc and the axis of the rotating shaft are located on the same straight line;

[0018] Beneficial effects of the utility model:

[0019] The utility model is provided with an inner rotor disk and an outer rotor disk, and is provided with an installation groove and a pressure strip. When installing the magnetic steel, the magnetic steel is fixed to the installation groove by an adhesive, and is further fixed by the cooperation of the pressure strip of the outer rotor disk and the groove of the magnetic steel, so that after the magnetic steel is installed, the magnetic steel is coated between the inner rotor disk and the outer rotor disk to form an encapsulated installation structure, and the magnetic steel is fixed by both adhesive and pressure strip at the same time, so that the stability of the magnetic steel after installation is stronger, and the magnetic steel is not easy to loosen or detach after high-speed rotation of the rotor and long-term use, so the reliability is higher and the service life is longer, and there is no need to punch holes in the magnetic steel, thereby avoiding the risk of damage to the magnetic steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is the overall structure diagram of the utility model;

[0022] Figure 2 It is an exploded view of the utility model;

[0023] Figure 3 It is a structural diagram of the inner rotor disc of the utility model;

[0024] Figure 4 It is a structural diagram of the outer rotor disc of the utility model.

[0025] Reference numerals:

[0026] 1. Inner rotor disk; 11. Inner disk body; 12. Mounting groove; 13. Positioning groove; 14. First opening; 15. Inner connecting screw hole; 2. Outer rotor disk; 21. Outer disk body; 22. Outer opening; 23. Pressure strip; 24. Outer surrounding ring; 25. Second opening; 26. Positioning column; 27. Outer connecting hole; 3. Magnetic steel; 31. Main body; 32. Groove; 4. Rotating shaft; 5. Rotating shaft connecting assembly; 51. Upper cover plate; 52. Lower cover plate; 53. Connecting column; 54. First screw; 6. Second screw. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Please see attached Figure 1 - Figure 4 As shown, a rotor mechanism of a disc motor in an embodiment of the utility model includes a rotating shaft 4, an outer end of the rotating shaft 4 is sleeved with an inner rotor disk 1 and an outer rotor disk 2 through a rotating shaft connecting assembly 5, the outer rotor disk 2 is covered on the top of the inner rotor disk 1, and the rotating shaft connecting assembly 5 is provided to connect and fix the rotating shaft 4 with the outer rotor disk 2 and the inner rotor disk 1.

[0029] The inner rotor disk 1 includes an inner disk body 11, and a plurality of mounting grooves 12 are provided on the outer side of the upper end surface of the inner disk body 11. The interiors of the plurality of mounting grooves 12 are all fixed with magnetic steels 3 by adhesive. When the magnetic steel 3 is installed, the adhesive is applied between the magnetic steel 3 and the mounting grooves 12, and the magnetic steel 3 and the mounting grooves 12 are preliminarily connected and fixed by the adhesive.

[0030] The outer rotor disk 2 comprises an outer disk body 21 , a plurality of outer openings 22 are formed on the outer side of the upper end surface of the outer disk body 21 , and pressure strips 23 are fixed on both sides of the lower end surfaces of the plurality of outer openings 22 .

[0031] The magnetic steel 3 includes a main body 31, and grooves 32 are provided on both sides of the main body 31. The lower end of the pressure strip 23 abuts against the groove 32, and the upper end surface of the main body 31 protrudes from the outer opening 22. The pressure strip 23 is capable of cooperating with the groove 32. After the outer disk body 21 is covered on the outer end of the inner disk body 11, the pressure strip 23 is directly pressed on the outer end of the groove 32 of the main body 31 of the magnetic steel 3, thereby further fixing the magnetic steel 3, so that the magnetic steel 3 is covered between the inner rotor disk 1 and the outer rotor disk 2 after installation, forming an encapsulated installation structure. Moreover, the magnetic steel 3 is fixed by both adhesive and pressure strip 23, so that the stability of the magnetic steel 3 after installation is stronger. After the rotor rotates at high speed and is used for a long time, it is not easy for the magnetic steel 3 to loosen or detach, and the reliability is higher and the service life is longer.

[0032] The rotating shaft connection assembly 5 includes an upper cover plate 51 and a lower cover plate 52. The rotating shaft 4 passes through the inner disk body 11 and the outer disk body 21 and is clamped with the inner disk body 11 and the outer disk body 21. Key grooves are provided on the inner sides of the inner disk body 11 and the outer disk body 21. When the rotating shaft 4 is connected, the shaft key of the rotating shaft 4 is clamped with the key grooves of the inner disk body 11 and the outer disk body 21, so that the inner disk body 11 and the outer disk body 21 can drive the rotating shaft 4 to rotate when rotating.

[0033] The upper cover plate 51 is sleeved on the upper side of the outer end of the rotating shaft 4, and the lower cover plate 52 is sleeved on the lower side of the outer end of the rotating shaft 4. The upper end surface of the lower cover plate 52 is fixed with a plurality of connecting columns 53 that pass through the inner disk body 11 and the outer disk body 21. A plurality of first screws 54 are threadedly connected between the upper cover plate 51 and the connecting columns 53. The upper cover plate 51 and the lower cover plate 52 are provided to fix the rotating shaft 4 and connect the inner disk body 11 and the outer disk body 21 at the same time. When connecting, the connecting columns 53 of the outer disk body 21 are passed through the reserved holes of the inner disk body 11 and the outer disk body 21, and then the upper cover plate 51 and the connecting columns 53 are fixed by a plurality of first screws 54.

[0034] An outer ring 24 is fixed to the outer end of the outer disk body 21, and a plurality of outer connecting holes 27 are provided on the surface of the outer ring 24. A plurality of inner connecting screw holes 15 are provided on the outer end of the inner disk body 11. The outer connecting holes 27 correspond to the inner connecting screw holes 15 one by one and are connected with second screws 6. By setting the second screws 6 for further connection and fixation, the connection between the outer disk body 21 and the inner disk body 11 is more firmly connected and more reliable, and is less likely to loosen.

[0035] The outer encircling ring 24 is wrapped around the outer end of the inner disk body 11. After installation, the outer encircling ring 24 can close the outer end opening of the installation groove 12, so that the magnet 3 cannot escape from the outer end opening of the installation groove 12, further improving the reliability of the magnet 3 after installation.

[0036] The upper end surface of the inner disk body 11 is located between the two installation grooves 12 and is provided with a positioning groove 13, and the lower end surface of the outer disk body 21 is located between the two outer openings 22 and is fixed with a positioning column 26, and the positioning column 26 is plugged into the positioning groove 13 one by one. When the outer disk body 21 is installed, the positioning column 26 and the positioning groove 13 are aligned, so that the outer disk body 21 can be stably and accurately installed with the inner disk body 11 to ensure the installation accuracy.

[0037] A plurality of first openings 14 are provided on the inner side of the inner disk body 11 around the rotating shaft 4, and a plurality of second openings 25 are provided on the inner side of the outer disk body 21 around the rotating shaft 4. The provision of the first openings 14 and the second openings 25 can reduce the material usage of the inner disk body 11 and the outer disk body 21, reduce the weight, and also save material costs. In addition, the provision of the first openings 14 and the second openings 25 also leaves space for air circulation, which can facilitate heat dissipation of the rotor.

[0038] The axes of the inner rotor disk 1, the outer rotor disk 2 and the rotating shaft 4 are located on the same straight line. The inner rotor disk 1, the outer rotor disk 2 and the rotating shaft 4 with axes located on the same straight line have strong stability during rotation, which is convenient for ensuring dynamic balance.

[0039] Working principle: During installation, firstly, the magnetic steel 3 is preliminarily connected and fixed to the installation groove 12 by adhesive, then the positioning column 26 and the positioning groove 13 are aligned, and the outer plate body 21 is installed on the outer end of the inner plate body 11. After the outer plate body 21 is installed, the pressure strip 23 is directly pressed on the outer end of the groove 32 of the main body 31, so that the magnetic steel 3 is clamped between the pressure strip 23 and the installation groove 12, thereby further fixing the magnetic steel 3, forming a covering installation structure, and the adhesive and the pressure strip 23 are used for fixing at the same time, so that the magnetic steel 3 The stability after installation is stronger. After the rotor rotates at high speed and is used for a long time, the magnet 3 is not easy to loosen or fall off. Then the shaft is installed through the shaft connecting assembly 5. The shaft connecting assembly 5 can also connect and fix the middle of the outer disk body 21 and the inner disk body 11. Finally, the outer surrounding ring 24 is connected and fixed to the inner disk body 11 through the second screw 6. The outer surrounding ring 24 can close the outer end opening of the installation groove 12, so that the magnet 3 cannot fall out of the outer end opening of the installation groove 12, which further improves the reliability of the magnet 3 after installation.

[0040] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A rotor mechanism of a disc motor, comprising a rotating shaft (4), characterized in that: The outer end of the rotating shaft (4) is sleeved with an inner rotor disc (1) and an outer rotor disc (2) via a rotating shaft connecting assembly (5), and the outer rotor disc (2) is covered on the upper part of the inner rotor disc (1); The inner rotor disk (1) comprises an inner disk body (11), a plurality of mounting grooves (12) are provided on the outer side of the upper end surface of the inner disk body (11), and magnetic steels (3) are fixed inside the plurality of mounting grooves (12) by adhesive; The outer rotor disk (2) comprises an outer disk body (21), a plurality of outer openings (22) are provided on the outer side of the upper end surface of the outer disk body (21), and pressure strips (23) are fixed on both sides of the lower end surfaces of the plurality of outer openings (22); The magnetic steel (3) comprises a main body (31), both sides of which are provided with grooves (32), the lower end of the pressure strip (23) abuts against the groove (32), and the upper end surface of the main body (31) protrudes out of the outer opening (22).

2. The rotor mechanism of a disc motor according to claim 1, characterized in that: The rotating shaft connection assembly (5) comprises an upper cover plate (51) and a lower cover plate (52); the rotating shaft (4) penetrates the inner disk body (11) and the outer disk body (21) and is clamped with the inner disk body (11) and the outer disk body (21).

3. The rotor mechanism of a disc motor according to claim 2, characterized in that: The upper cover plate (51) is sleeved on the upper side of the outer end of the rotating shaft (4), and the lower cover plate (52) is sleeved on the lower side of the outer end of the rotating shaft (4). A plurality of connecting columns (53) penetrating the inner disk body (11) and the outer disk body (21) are fixed to the upper end surface of the lower cover plate (52), and a plurality of first screws (54) are connected between the upper cover plate (51) and the connecting columns (53) via threads.

4. The rotor mechanism of a disc motor according to claim 1, characterized in that: An outer enclosing ring (24) is fixed to the outer end of the outer disk body (21), and a plurality of outer connecting holes (27) are provided on the surface of the outer enclosing ring (24). A plurality of inner connecting screw holes (15) are provided on the outer end of the inner disk body (11), and the outer connecting holes (27) correspond to the inner connecting screw holes (15) one by one and are connected with second screws (6).

5. The rotor mechanism of a disc motor according to claim 4, characterized in that: The outer surrounding ring (24) covers the outer end of the inner disk body (11).

6. The rotor mechanism of a disc motor according to claim 1, characterized in that: The upper end surface of the inner disk body (11) is located between the two installation grooves (12) and is provided with a positioning groove (13). The lower end surface of the outer disk body (21) is located between the two outer openings (22) and is fixed with a positioning column (26). The positioning column (26) is plugged into the positioning groove (13) in a one-to-one correspondence.

7. The rotor mechanism of a disc motor according to claim 1, characterized in that: The inner side of the inner disk (11) is provided with a plurality of first openings (14) around the rotating shaft (4), and the inner side of the outer disk (21) is provided with a plurality of second openings (25) around the rotating shaft (4).

8. The rotor mechanism of a disc motor according to claim 1, characterized in that: The axes of the inner rotor disk (1), the outer rotor disk (2) and the rotating shaft (4) are located on the same straight line.

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