permanent magnet synchronous motor

Abstract

The application belongs to the field of electric machines, and particularly relates to a permanent magnet synchronous motor. In view of the problem that the existing permanent magnet synchronous motor is prone to high temperature which is difficult to dissipate in time due to high load operation, and the heat dissipation mesh opening of the motor is easily blocked by foreign matters, affecting the service life of the motor, the following scheme is proposed, which comprises a base, the top of the base is fixedly connected with a motor shell, one side of the motor shell is provided with a heat dissipation shell, a stator is arranged on the inner wall of the motor shell, a stator winding is arranged on the outer side of the stator, a rotating shaft is arranged on the motor shell, a rotor is arranged on the outer side of the rotating shaft, and a plurality of permanent magnets are arranged on the outer side of the rotor. The motor can intermittently additionally have several auxiliary heat dissipation ventilation holes when starting, the efficiency of heat dissipation is improved, and the foreign matters on the mesh opening of the heat dissipation shell can be cleaned to avoid blocking and affecting heat dissipation.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more particularly to a permanent magnet synchronous motor. Background Technology

[0002] In the current technology, under the same design parameters, the permanent magnet synchronous motor is much smaller than other types of motors, which also brings a severe challenge to its heat dissipation. In the small space inside the permanent magnet synchronous motor, if the heat generated cannot be dissipated in time, the internal temperature of the motor will gradually rise. This will cause demagnetization of the permanent magnets in the rotor, affecting the performance of the motor. In severe cases, it may even burn out the stator windings and damage the motor.

[0003] However, existing permanent magnet synchronous motors are prone to overheating due to high load operation, which is difficult to dissipate in time. Furthermore, the motor's heat dissipation vents are easily blocked by foreign objects, affecting the motor's service life. Summary of the Invention

[0004] The purpose of this invention is to solve the shortcomings of existing permanent magnet synchronous motors, such as the difficulty in dissipating high temperatures caused by high-load operation and the easy obstruction of the motor's heat dissipation vents by foreign objects, which affects the motor's service life. The invention proposes a permanent magnet synchronous motor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A permanent magnet synchronous motor includes a base, a motor housing fixedly connected to the top of the base, a heat sink housing mounted on one side of the motor housing, a stator disposed on the inner wall of the motor housing, a stator winding wound around the outer side of the stator, a rotating shaft disposed on the motor housing, a rotor sleeved on the outer side of the rotating shaft, multiple permanent magnets disposed on the outer side of the rotor, multiple auxiliary heat dissipation mechanisms disposed on the motor housing, a first fan blade shaft rotatably mounted inside the heat sink housing, one end of the rotating shaft extending into the heat sink housing and fixedly connected to one end of the first fan blade shaft, a first fan blade fixedly sleeved on the outer side of the first fan blade shaft, a cleaning mechanism disposed on one side of the heat sink housing, the cleaning mechanism cooperating with the first fan blade shaft, and the first fan blade cooperating with the auxiliary heat dissipation mechanisms.

[0007] Preferably, the auxiliary heat dissipation mechanism includes a first groove formed on the inner wall of the motor housing, and a transmission cavity is formed inside the motor housing. A second fan blade shaft is rotatably installed in the transmission cavity. One end of the second fan blade shaft extends into the first groove and is fixedly connected to a second fan blade. A first ventilation pipe is provided inside the motor housing. One end of the first ventilation pipe is connected to the first groove, and the other end of the first ventilation pipe extends into the heat dissipation housing.

[0008] Preferably, a first rotating rod is rotatably installed inside the transmission cavity, a large gear is fixedly sleeved on the outer side of the first rotating rod, and a small gear is fixedly sleeved on the outer side of the second fan blade shaft. The small gear meshes with the large gear, and the small gear can drive the large gear to rotate and reduce the speed while increasing the torque.

[0009] Preferably, a half gear is fixedly sleeved on the outer side of the first rotating rod, and a second rotating rod is rotatably installed in the transmission cavity. One end of the second rotating rod is fixedly connected to the first gear, which cooperates with the half gear. A torsion spring is sleeved on the outer side of the second rotating rod, and the torsion spring can drive the second rotating rod to rotate and reset.

[0010] Preferably, a first rotating groove is provided on the outer side of the motor housing, a rotating plate is rotatably installed in the first rotating groove, one end of the second rotating rod extends into the first rotating groove and is fixedly connected to the rotating plate, an arc-shaped ventilation opening is provided on the rotating plate, a second ventilation pipe is provided on the motor housing, one end of the second ventilation pipe is connected to the first rotating groove and the second ventilation pipe cooperates with the arc-shaped ventilation opening; the other end of the second ventilation pipe extends into the motor housing.

[0011] Preferably, the cleaning mechanism includes a second rotating groove formed on the heat dissipation housing, a rotating block rotatably mounted in the second rotating groove, a third rotating rod rotatably connected to the rotating block, and a cleaning roller sleeved on the outer side of the third rotating rod.

[0012] Preferably, a second groove is provided on one side of the rotating block, and the other end of the first fan blade shaft extends into the second groove and is fixedly connected to a second gear. A fourth rotating rod is rotatably installed in the second rotating groove, and a third gear is fixedly connected to one end of the fourth rotating rod. The third gear meshes with the second gear. A gear ring is provided on the inner wall of the second groove, and the gear ring meshes with the third gear. The second gear can drive the rotating block to rotate through the third gear and the gear ring.

[0013] Preferably, a fixing ring is fixedly connected to one side of the heat dissipation housing, and an annular groove is formed on the inner wall of the fixing ring. A bevel gear ring is provided in the annular groove. One end of the third rotating rod extends into the annular groove and is fixedly connected to a bevel gear. The bevel gear meshes with the bevel gear ring, and the bevel gear ring can make the revolving bevel gear rotate.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. This solution uses a rotating shaft and a first fan blade shaft to cooperate with the first fan blade, a first ventilation pipe to cooperate with the first groove, and a second fan blade shaft to cooperate with the second fan blade, so that when the first fan blade rotates, airflow is introduced through the first ventilation pipe to dissipate heat into the motor housing, and the airflow can actively drive the second fan blade to rotate.

[0016] 2. In this design, the half gear engages with the first gear, the second rotating rod engages with the torsion spring, and the rotating plate engages with the second ventilation pipe through the arc-shaped ventilation opening. This allows the rotating plate to rotate intermittently when the second fan blade rotates, and the arc-shaped ventilation opening and the second ventilation pipe overlap, thus creating several additional auxiliary heat dissipation ventilation holes on the motor housing and improving heat dissipation efficiency.

[0017] 3. In this solution, the second and third gears cooperate with the gear ring, and the third rotating rod cooperates with the bevel gear ring through the bevel gear, thereby causing the cleaning roller to rotate and clean the foreign objects on the mesh port of the heat dissipation shell, so as to prevent them from blocking and affecting heat dissipation;

[0018] This invention can intermittently generate several additional auxiliary heat dissipation and ventilation holes when the motor starts, thereby improving heat dissipation efficiency. It can also clean foreign objects on the mesh port of the heat dissipation housing to prevent them from blocking heat dissipation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the permanent magnet synchronous motor proposed in this invention;

[0020] Figure 2 The permanent magnet synchronous motor proposed in this invention Figure 1 Enlarged structural diagram at point A in the middle;

[0021] Figure 3 The permanent magnet synchronous motor proposed in this invention Figure 1 Enlarged structural diagram at point B;

[0022] Figure 4 The permanent magnet synchronous motor proposed in this invention Figure 1 Enlarged structural diagram at point C;

[0023] Figure 5 This is a schematic diagram of the rotating plate structure of the permanent magnet synchronous motor proposed in this invention.

[0024] In the diagram: 1. Base; 2. Motor housing; 3. Heat sink housing; 4. Stator; 5. Rotating shaft; 6. Rotor; 7. First fan blade shaft; 8. First fan blade; 9. Second fan blade shaft; 10. Second fan blade; 11. First rotating rod; 12. Large gear; 13. Small gear; 14. Half gear; 15. Second rotating rod; 16. First gear; 17. Torsion spring; 18. Rotating plate; 19. Arc-shaped vent; 20. Rotating block; 21. Third rotating rod; 22. Cleaning roller; 23. Second gear; 24. Fourth rotating rod; 25. Third gear; 26. Gear ring; 27. Fixing ring; 28. Bevel gear ring; 29. ​​Bevel gear; 30. Stator winding; 31. Permanent magnet; 32. Transmission cavity. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Example 1

[0026] Reference Figure 1-5 A permanent magnet synchronous motor includes a base 1, a motor housing 2 fixedly connected to the top of the base 1 by welding, a heat sink 3 installed on one side of the motor housing 2, a stator 4 provided on the inner wall of the motor housing 2, a stator winding 30 wound on the outer side of the stator 4, a rotating shaft 5 provided on the motor housing 2, a rotor 6 sleeved on the outer side of the rotating shaft 5, multiple permanent magnets 31 provided on the outer side of the rotor 6, multiple auxiliary heat dissipation mechanisms provided on the motor housing 2, a first fan blade shaft 7 rotatably installed inside the heat sink 3, one end of the rotating shaft 5 extends into the heat sink 3 and is fixedly connected to one end of the first fan blade shaft 7, a first fan blade 8 fixedly sleeved on the outer side of the first fan blade shaft 7 by welding, a cleaning mechanism provided on one side of the heat sink 3, the cleaning mechanism cooperating with the first fan blade shaft 7, and the first fan blade 8 cooperating with the auxiliary heat dissipation mechanisms.

[0027] In this embodiment, the auxiliary heat dissipation mechanism includes a first groove formed on the inner wall of the motor housing 2, and a transmission cavity 32 is formed inside the motor housing 2. A second fan blade shaft 9 is rotatably installed in the transmission cavity 32. One end of the second fan blade shaft 9 extends into the first groove and is fixedly connected to a second fan blade 10 by welding. A first ventilation pipe is provided inside the motor housing 2. One end of the first ventilation pipe is connected to the first groove, and the other end of the first ventilation pipe extends into the heat dissipation housing 3.

[0028] In this embodiment, a first rotating rod 11 is rotatably installed in the transmission cavity 32. A large gear 12 is fixedly sleeved on the outside of the first rotating rod 11 by welding. A small gear 13 is fixedly sleeved on the outside of the second fan blade shaft 9 by welding. The small gear 13 meshes with the large gear 12. The small gear 13 can drive the large gear 12 to rotate and reduce the speed to increase the torque.

[0029] In this embodiment, a half gear 14 is fixedly sleeved on the outer side of the first rotating rod 11 by welding. A second rotating rod 15 is rotatably installed in the transmission cavity 32. One end of the second rotating rod 15 is fixedly connected to the first gear 16 by welding. The first gear 16 cooperates with the half gear 14. A torsion spring 17 is sleeved on the outer side of the second rotating rod 15. The torsion spring 17 can drive the second rotating rod 15 to rotate and reset.

[0030] In this embodiment, a first rotating groove is provided on the outer side of the motor housing 2, and a rotating plate 18 is rotatably installed in the first rotating groove. One end of the second rotating rod 15 extends into the first rotating groove and is fixedly connected to the rotating plate 18 by welding. An arc-shaped ventilation opening 19 is provided on the rotating plate 18. A second ventilation pipe is provided on the motor housing 2. One end of the second ventilation pipe is connected to the first rotating groove, and the second ventilation pipe cooperates with the arc-shaped ventilation opening 19. The other end of the second ventilation pipe extends into the motor housing 2.

[0031] In this embodiment, the cleaning mechanism includes a second rotating groove formed on the heat dissipation housing 3, a rotating block 20 is rotatably installed in the second rotating groove, a third rotating rod 21 is rotatably connected to the rotating block 20, and a cleaning roller 22 is sleeved on the outside of the third rotating rod 21.

[0032] In this embodiment, a second groove is provided on one side of the rotating block 20, and the other end of the first fan blade shaft 7 extends into the second groove and is fixedly connected to the second gear 23 by welding. A fourth rotating rod 24 is rotatably installed in the second rotating groove, and a third gear 25 is fixedly connected to one end of the fourth rotating rod 24 by welding. The third gear 25 meshes with the second gear 23. A gear ring 26 is provided on the inner wall of the second groove, and the gear ring 26 meshes with the third gear 25. The second gear 23 can drive the rotating block 20 to rotate through the third gear 25 and the gear ring 26.

[0033] In this embodiment, a fixing ring 27 is fixedly connected to one side of the heat dissipation housing 3 by welding. An annular groove is provided on the inner wall of the fixing ring 27, and a bevel gear ring 28 is provided in the annular groove. One end of the third rotating rod 21 extends into the annular groove and is fixedly connected to a bevel gear 29 by welding. The bevel gear 29 meshes with the bevel gear ring 28, and the bevel gear ring 28 can make the revolving bevel gear 29 rotate.

[0034] In this embodiment, during use, the rotation of the rotating shaft 5 drives the first fan blade shaft 7 to rotate and the first fan blade 8 to rotate. The rotation of the first fan blade 8 drives airflow interaction, thereby achieving the purpose of heat dissipation inside the motor housing 2. At the same time, some airflow inside the motor housing 2 can flow through the first ventilation pipe. During the flow, the airflow can drive the second fan blade 10 to rotate. The second fan blade 10 can drive the pinion 13 to rotate through the second fan blade shaft 9. The pinion 13 can drive the large gear 12 to rotate and reduce the speed while increasing the torque. The large gear 12 drives the half gear 14 to rotate through the first rotating rod 11. The half gear 14 can intermittently drive the first gear 16 to rotate. The first gear 16 can drive the rotating plate 18 to rotate through the second rotating rod 15. This causes the torsion spring 17 to deform, allowing the arc-shaped vent 19 on the rotating plate 18 to intermittently overlap with the second ventilation pipe, thus creating several additional auxiliary ventilation holes to improve heat dissipation efficiency. During use, the second ventilation pipe opening can be blocked on the plate 18 to prevent foreign objects from entering. At the same time, the first fan blade shaft 7 drives the second gear 23 to rotate. The second gear 23 drives the rotating block 20 to rotate through the third gear 25 and gear ring 26. The rotating block 20 can drive the third rotating rod 21 to revolve, so that the third rotating rod 21 can drive the bevel gear 29 to rotate on the bevel gear ring 28. This allows the third rotating rod 21 to drive the cleaning roller 22 to rotate, cleaning the foreign objects blocking the mesh opening of the heat dissipation housing 3 and preventing them from affecting heat dissipation. Example 2

[0035] The difference from Embodiment 1 is that the bottom of the base 1 is provided with multiple rubber feet to improve stability and reduce vibration.

[0036] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. Permanent magnet synchronous motor comprising a base (1), characterized in that, The top of the base (1) is fixedly connected with a motor shell (2), one side of the motor shell (2) is provided with a heat dissipation shell (3), the inner wall of the motor shell (2) is provided with a stator (4), the outer side of the stator (4) is provided with a stator winding (30), the motor shell (2) is provided with a rotating shaft (5), the outer side of the rotating shaft (5) is provided with a rotor (6), the outer side of the rotor (6) is provided with a plurality of permanent magnets (31), the motor shell (2) is provided with a plurality of auxiliary heat dissipation mechanisms, the heat dissipation shell (3) is rotatably provided with a first fan shaft (7), one end of the rotating shaft (5) extends into the heat dissipation shell (3) and is fixedly connected with one end of the first fan shaft (7), the outer side of the first fan shaft (7) is fixedly provided with a first fan blade (8), one side of the heat dissipation shell (3) is provided with a cleaning mechanism, the cleaning mechanism is matched with the first fan shaft (7), the first fan blade (8) is matched with the auxiliary heat dissipation mechanism. The auxiliary heat dissipation mechanism comprises a first groove formed in the inner wall of the motor shell (2), and a transmission cavity (32) is formed in the motor shell (2), a second fan shaft (9) is rotatably installed in the transmission cavity (32), one end of the second fan shaft (9) extends into the first groove and is fixedly connected with a second fan blade (10), the motor shell (2) is provided with a first ventilation pipe, one end of the first ventilation pipe is communicated with the first groove, and the other end of the first ventilation pipe extends into the heat dissipation shell (3). A first rotating rod (11) is rotatably installed in the transmission cavity (32), a large gear (12) is fixedly provided on the outer side of the first rotating rod (11), a small gear (13) is fixedly provided on the outer side of the second fan shaft (9), and the small gear (13) is engaged with the large gear (12). The outer side of the first rotating rod (11) is fixedly provided with a half gear (14), a second rotating rod (15) is rotatably installed in the transmission cavity (32), one end of the second rotating rod (15) is fixedly connected with a first gear (16), the first gear (16) is matched with the half gear (14), and the outer side of the second rotating rod (15) is provided with a torsion spring (17). The outer side of the motor shell (2) is provided with a first rotating groove, a rotating plate (18) is rotatably installed in the first rotating groove, one end of the second rotating rod (15) extends into the first rotating groove and is fixedly connected with the rotating plate (18), an arc-shaped ventilation opening (19) is formed in the rotating plate (18), the motor shell (2) is provided with a second ventilation pipe, one end of the second ventilation pipe is communicated with the first rotating groove, and the second ventilation pipe is matched with the arc-shaped ventilation opening (19), and the other end of the second ventilation pipe extends into the motor shell (2).

2. The permanent magnet synchronous motor according to claim 1, characterized in that, The cleaning mechanism comprises a second rotating groove formed in the heat dissipation shell (3), a rotating block (20) is rotatably installed in the second rotating groove, a third rotating rod (21) is rotatably connected to the rotating block (20), and a cleaning roller (22) is provided on the outer side of the third rotating rod (21).

3. The permanent magnet synchronous motor according to claim 2, characterized in that, One side of the rotating block (20) is provided with a second groove, the other end of the first fan shaft (7) extends into the second groove and is fixedly connected with a second gear (23), a fourth rotating rod (24) is rotatably installed in the second rotating groove, one end of the fourth rotating rod (24) is fixedly connected with a third gear (25), the third gear (25) is engaged with the second gear (23), and the inner wall of the second groove is provided with a gear ring (26), and the gear ring (26) is engaged with the third gear (25).

4. The permanent magnet synchronous motor according to claim 3, characterized in that, One side of the heat dissipation shell (3) is fixedly connected with a fixed ring (27), an annular groove is formed in the inner wall of the fixed ring (27), a bevel gear (28) is arranged in the annular groove, one end of the third rotating rod (21) extends into the annular groove and is fixedly connected with a bevel gear (29), and the bevel gear (29) is engaged with the bevel gear (28).

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