Permanent magnet motor rotor

Abstract

The utility model discloses a permanent magnet motor rotor, which relates to the technical field of permanent magnet motors and comprises a bearing, an iron core rotor is arranged on the back surface of the bearing, a first iron core pressing plate is mounted on the front surface of the iron core rotor, and a second iron core pressing plate is mounted on the front surface of the first iron core pressing plate. A magnetic steel pressing plate is installed on the inner wall of the first iron core pressing plate, a connecting plate is arranged on the inner wall of the magnetic steel pressing plate, multiple sets of magnetic steel are arranged at the position, close to the outer side, of the front face of the iron core rotor in a penetrating mode, a rotating shaft is installed on the inner side wall of the bearing, and a permanent magnet is arranged on the front face of the rotating shaft; the permanent magnet motor rotor has the advantages that damaged magnetic steel can be replaced independently, the practicability of the permanent magnet motor rotor is improved, the permanent magnet motor rotor can be connected with motor shells with different widths, and the functionality of the permanent magnet motor rotor is improved.

Description

Technical Field

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

[0002] A permanent magnet motor is a motor that uses permanent magnets to generate a magnetic field. Unlike traditional electrically excited motors, permanent magnet motors do not require an additional excitation power supply to generate a magnetic field, but directly use the magnetic field generated by permanent magnets to work. This type of motor has the advantages of simple structure, small size, light weight, high efficiency, and fast response speed. Therefore, it has been widely used in many fields, such as electric vehicles, wind power generation, aerospace, etc. The permanent magnet motor rotor is a key component in the permanent magnet motor, which is located in the rotating part of the motor;

[0003] After searching, the patent number is CN212811408U, which discloses a permanent magnet motor rotor. The rotor core and the cylindrical shaft are integrated through intermittent corner welds, eliminating the traditional key connection and transmitting torque through intermittent welds. It has obvious advantages in processability and reliability; however, the magnetic steel and the core rotor of the device are integrated. After a single magnetic steel is damaged, the entire device needs to be replaced, which is time-consuming and labor-intensive; for this reason, we propose a permanent magnet motor rotor. Utility Model Content

[0004] The utility model aims to provide a permanent magnet motor rotor.

[0005] In order to solve the problems raised in the above-mentioned background technology, the utility model provides the following technical solutions: a permanent magnet motor rotor, comprising a bearing, an iron core rotor is arranged on the back of the bearing, a first iron core pressure plate is installed on the front of the iron core rotor, a second iron core pressure plate is installed on the front of the first iron core pressure plate, a magnetic steel pressure plate is installed on the inner wall of the first iron core pressure plate, a connecting plate is arranged on the inner wall of the magnetic steel pressure plate, a plurality of groups of magnetic steel are penetrated through the front of the iron core rotor near the outer side, a rotating shaft is installed on the inner wall of the bearing, and a permanent magnet is arranged on the front of the rotating shaft.

[0006] Preferably, a first bolt is disposed through the front surface of the second core pressure plate, and the first bolt passes through the connecting plate.

[0007] Preferably, a first slide slot is provided at a position where the magnetic steel contacts the core rotor, and the magnetic steel is rotatably connected to the first slide slot.

[0008] Preferably, a plurality of groups of heat dissipation blades are fixedly connected to the outer side wall of the core rotor, and air guide grooves are provided on the surfaces of the heat dissipation blades.

[0009] Preferably, sliding boxes are installed on both sides of the outer wall of the bearing, the inner wall of the sliding box is provided with a sliding block, the outer wall of the sliding block is provided with a sliding plate, the outer wall of the sliding plate is provided with a mounting seat, and the back of the sliding box is provided with a friction plate.

[0010] Preferably, a second bolt is movably connected to the back side of the friction plate, and the second bolt passes through the slider.

[0011] Preferably, a second sliding groove is provided at the position where the sliding block contacts the sliding box, and the sliding block is slidably connected to the second sliding groove.

[0012] By adopting the above technical scheme, when the magnetic steel needs to be replaced, the first bolt corresponding to the position of the magnetic steel is rotated, so that the first bolt no longer fixes the first iron core pressure plate and the second iron core pressure plate. At this time, the magnetic steel pressure plates on both sides are pulled out from the inside of the first iron core pressure plate through the cooperation of the connecting plate, so that the restriction of the magnetic steel pressure plate on the magnetic steel disappears, and then the magnetic steel is taken out and replaced through the cooperation of the first sliding groove. After the replacement is completed, the magnetic steel pressure plate is inserted into the inside of the first iron core pressure plate again, so that the magnetic steel pressure plate and the connecting plate restrict the magnetic steel again, and then the first bolt is rotated to connect the connecting plate with the second iron core pressure plate, so that the magnetic steel pressure plate will not move, and then the cooperation of the heat dissipation blades can be used to perform auxiliary heat dissipation when the permanent magnet motor is running, so that the permanent magnet motor rotor can replace the damaged magnetic steel alone, thereby improving the practicality of the permanent magnet motor rotor;

[0013] By adopting the above technical solution, the second bolt is rotated to make the second bolt disappear in fixing the slider, and then the mounting seat is pulled so that the mounting seat, with the cooperation of the slide plate and the second slide groove, drives the slider to move inside the sliding box. At the same time, when the slider moves, the slider drives the second bolt to slide through the cooperation of the groove. When the mounting seat contacts the inner wall of the motor housing, it stops, and then the mounting seat is fixed to the inner wall of the motor housing. At this time, the second bolt is rotated again to fix the slider by the second bolt, thereby completing the fixation. At the same time, through the cooperation of the friction plate, the fixation of the slider by the second bolt is more stable, so that the permanent magnet motor rotor can be connected to motor housings of different widths, thereby improving the functionality of the permanent magnet motor rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure in the embodiment of the utility model;

[0015] Figure 2 It is a rear view of an embodiment of the utility model;

[0016] Figure 3 It is a schematic diagram of the connection structure between the core rotor and the first core pressure plate in the embodiment of the utility model;

[0017] Figure 4 It is a schematic diagram of the connection structure between the sliding box and the sliding block in the embodiment of the utility model.

[0018] In the figure: 1. bearing; 2. iron core rotor; 3. first iron core pressure plate; 4. second iron core pressure plate; 5. connecting plate; 6. magnetic steel pressure plate; 7. first bolt; 8. magnetic steel; 9. first slide groove; 10. heat dissipation blade; 11. permanent magnet; 12. rotating shaft; 13. sliding box; 14. sliding block; 15. sliding plate; 16. second bolt; 17. friction plate; 18. mounting seat; 19. second slide groove. DETAILED DESCRIPTION

[0019] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0020] Embodiment 1:

[0021] See also Figure 1-4 The utility model provides a technical solution: a permanent magnet motor rotor, including a bearing 1, an iron core rotor 2 is arranged on the back of the bearing 1, a first iron core pressure plate 3 is installed on the front of the iron core rotor 2, a second iron core pressure plate 4 is installed on the front of the first iron core pressure plate 3, a magnetic steel pressure plate 6 is installed on the inner wall of the first iron core pressure plate 3, a connecting plate 5 is arranged on the inner wall of the magnetic steel pressure plate 6, a plurality of groups of magnetic steels 8 are penetrated and arranged near the outer side of the front of the iron core rotor 2, a rotating shaft 12 is installed on the inner wall of the bearing 1, and a permanent magnet 11 is arranged on the front of the rotating shaft 12.

[0022] A first bolt 7 is disposed through the front surface of the second core pressing plate 4 , and the first bolt 7 passes through the connecting plate 5 .

[0023] A first slide slot 9 is provided at a position where the magnetic steel 8 contacts the core rotor 2 , and the magnetic steel 8 is rotatably connected to the first slide slot 9 .

[0024] A plurality of groups of heat dissipation blades 10 are fixedly connected to the outer side wall of the core rotor 2 , and air guide grooves are formed on the surfaces of the heat dissipation blades 10 .

[0025] During use, when a single magnetic steel 8 is damaged, the magnetic steel 8 needs to be replaced. At this time, the first bolt 7 at the position corresponding to the magnetic steel 8 is rotated so that the fixation between the first bolt 7 and the first core pressure plate 3 and the second core pressure plate 4 disappears, and then the first bolt 7 is taken out and placed to one side, and then the connecting plate 5 is pulled. When the connecting plate 5 moves, the magnetic steel pressure plates 6 on both sides will move with the connecting plate 5, and thus be pulled out from the inside of the first core pressure plate 3. At this time, the restriction of the magnetic steel pressure plate 6 on the magnetic steel 8 will disappear, and then the magnetic steel 8 to be replaced will be slid out of the inside of the core rotor 2 through the first slide groove 9, and the magnetic steel 8 will be replaced. After the replacement is completed, the magnetic steel pressure plate 6 is inserted again The first core pressure plate 3 is inserted into the first core pressure plate 3 so that the magnetic steel pressure plate 6 restricts the magnetic steel 8 again, and then the first bolt 7 is rotated to fix the first bolt 7 with the first core pressure plate 3 and the second core pressure plate 4 again, and the bottom is inserted into the connecting plate 5. At this time, the magnetic steel pressure plate 6 connected to the connecting plate 5 slides inside the first core pressure plate 3, and when the core rotor 2 rotates inside the bearing 1 through the permanent magnet 11, the heat dissipation blades 10 will be driven to rotate together. At this time, the heat dissipation blades 10 will assist in heat dissipation through the action of themselves and the surface air guide grooves, so that the permanent magnet motor rotor can replace the damaged magnetic steel 8 alone, thereby improving the practicality of the permanent magnet motor rotor.

[0026] Embodiment 2:

[0027] See also Figure 1-4 The utility model provides a technical solution: a permanent magnet motor rotor, sliding boxes 13 are installed on both sides of the outer wall of the bearing 1, the inner wall of the sliding box 13 is provided with a slider 14, the outer wall of the slider 14 is provided with a slide plate 15, the outer wall of the slide plate 15 is provided with a mounting seat 18, and the back of the sliding box 13 is provided with a friction plate 17.

[0028] The back side of the friction plate 17 is movably connected with a second bolt 16 , and the second bolt 16 passes through the slider 14 .

[0029] A second sliding groove 19 is provided at a position where the sliding block 14 contacts the sliding box 13 , and the sliding block 14 is slidably connected to the second sliding groove 19 .

[0030] Specifically, by rotating the second bolt 16, the fixing of the slider 14 by the second bolt 16 disappears, and then the mounting seat 18 is pulled, so that the mounting seat 18 pulls the slide plate 15 to move together. At this time, when the slide plate 15 moves, it will drive the slider 14 to move inside the sliding box 13 through the second slide groove 19. At the same time, when the slider 14 moves, the slider 14 will drive the second bolt 16 to slide together through the notch on the back of the sliding box 13. When the mounting seat 18 contacts the inner wall of the motor housing, it stops, and then the mounting seat 18 is fixed to the inner wall of the motor housing. After the fixing is completed, the second bolt 16 is rotated again to fix the slider 14 by the second bolt 16, so that the slider 14 will not move inside the sliding box 13. At the same time, when the second bolt 16 rotates, it will squeeze the friction plate 17, thereby fitting with the surface of the friction plate 17, and then through the friction of the friction plate 17 itself, the second bolt 16 fixes the slider 14 more stably, so that the permanent magnet motor rotor can be connected to motor housings of different widths, thereby improving the functionality of the permanent magnet motor rotor.

[0031] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A permanent magnet motor rotor, comprising a bearing (1), characterized in that: An iron core rotor (2) is arranged on the back of the bearing (1), a first iron core pressure plate (3) is installed on the front of the iron core rotor (2), a second iron core pressure plate (4) is installed on the front of the first iron core pressure plate (3), a magnetic steel pressure plate (6) is installed on the inner wall of the first iron core pressure plate (3), a connecting plate (5) is arranged on the inner wall of the magnetic steel pressure plate (6), a plurality of groups of magnetic steel (8) are arranged through the front of the iron core rotor (2) near the outer side, a rotating shaft (12) is installed on the inner wall of the bearing (1), and a permanent magnet (11) is arranged on the front of the rotating shaft (12).

2. A permanent magnet motor rotor according to claim 1, characterized in that: A first bolt (7) is provided through the front surface of the second core pressing plate (4), and the first bolt (7) passes through the connecting plate (5).

3. A permanent magnet motor rotor according to claim 1, characterized in that: A first slide groove (9) is provided at the position where the magnetic steel (8) contacts the iron core rotor (2), and the magnetic steel (8) is rotatably connected to the first slide groove (9).

4. A permanent magnet motor rotor according to claim 3, characterized in that: A plurality of groups of heat dissipation blades (10) are fixedly connected to the outer side wall of the iron core rotor (2), and air guide grooves are provided on the surfaces of the heat dissipation blades (10).

5. A permanent magnet motor rotor according to claim 1, characterized in that: Sliding boxes (13) are installed on both sides of the outer wall of the bearing (1), a sliding block (14) is arranged on the inner wall of the sliding box (13), a sliding plate (15) is installed on the outer wall of the sliding block (14), a mounting seat (18) is installed on the outer wall of the sliding plate (15), and a friction plate (17) is arranged on the back side of the sliding box (13).

6. A permanent magnet motor rotor according to claim 5, characterized in that: The back side of the friction plate (17) is movably connected with a second bolt (16), and the second bolt (16) passes through the slider (14).

7. A permanent magnet motor rotor according to claim 6, characterized in that: A second sliding groove (19) is provided at the position where the sliding block (14) contacts the sliding box (13), and the sliding block (14) is slidably connected to the second sliding groove (19).

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