Low speed and high torque variable frequency speed regulation permanent magnet motor

Abstract

The present invention discloses a low-speed, high-torque variable-frequency speed-regulating permanent magnet motor, comprising a heat dissipation hollow mechanism, a cooling protection mechanism fixedly connected to the outer ring of the heat dissipation hollow mechanism, the cooling protection mechanism comprising a circulating cooling device, a protective casing, a fastening sealing cap, a fixed storage cavity and a circulating starting device, the circulating cooling device is fixedly connected to the inner center of the protective casing, the circulating starting device is fixedly installed on one side of the inner side of the protective casing, the fixed storage cavity is fixedly connected to the top of the side end of the protective casing, and the fixed storage cavity is located above the circulating starting device, the fastening sealing cap is slidably plugged into the top of the fixed storage cavity, and the circulating cooling device comprises a reflux pipe, a connecting circular hole, an auxiliary transmission pipe and a circulating cooling pipe. The present invention realizes the work of quickly dissipating heat of the permanent magnet motor and avoiding the phenomenon of demagnetization through the arrangement of the cooling protection mechanism and the heat dissipation hollow mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet motor equipment, in particular to a low-speed, high-torque variable-frequency speed-regulating permanent magnet motor. Background Art

[0002] According to Chinese patent number CN208638192U, the utility model discloses a polarized heat dissipation type unit permanent magnet motor, including a casing, a rotating shaft is provided in the middle position of the casing, an air guide cavity is provided inside the rotating shaft, a jet hole is provided on the rotating shaft surface where the air guide cavity is located, a rotor is provided on the rotating shaft surface, a stator corresponding to the rotor is fixed to the inner wall of the casing, and an air compression heat exchange mechanism for continuously replacing, compressing and cooling the air inside the casing is provided on the right end of the rotating shaft. The utility model has a simple and reasonable structure, and drives the air compression mechanism to work by using the rotating shaft as a driving force, thereby compressing the air, raising the temperature of the air, increasing the temperature difference with the heat exchange liquid, and improving the heat exchange effect, and then the compressed air is ejected along the jet hole. The compressed air expands outward to lower the temperature, thereby improving the heat dissipation effect of the casing, and the rotating jet hole makes the heat dissipation of the inner wall of the casing uniform, and the utility model is highly practical.

[0003] The permanent magnet motor is composed of a stator, a rotor, an end cover and other components. The stator is basically the same as an ordinary induction motor. A laminated structure is used to reduce the iron loss of the motor during operation. The rotor can be made solid or laminated. The stator winding can be a concentrated full-pitch winding, or a distributed short-pitch winding and an unconventional winding. The permanent magnet motor has the characteristics of high stability, light weight and large output power, which makes it frequently used in some areas with large transmission coefficients and high power consumption. When the existing permanent magnet motor is in use, it will generate high temperature due to long-term internal operation, and the eddy current loss and high-order harmonic loss will cause the stator temperature to rise sharply. If the temperature exceeds the maximum operating temperature, irreversible permanent demagnetization will occur. Summary of the invention

[0004] The purpose of the present invention is to provide a low-speed, high-torque variable-frequency speed-regulating permanent magnet motor to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a low-speed, high-torque variable-frequency speed-regulating permanent magnet motor, comprising a heat dissipation hollow mechanism, a cooling protection mechanism being fixedly connected to the outer ring of the heat dissipation hollow mechanism;

[0006] The cooling protection mechanism comprises a circulating cooling device, a protective casing, a fastening sealing cap, a fixed storage cavity and a circulating starting device, wherein the circulating cooling device is fixedly connected to the inner center of the protective casing, the circulating starting device is fixedly installed on one side of the inner part of the protective casing, the fixed storage cavity is fixedly connected to the top of the side end of the protective casing, and the fixed storage cavity is located above the circulating starting device, and the fastening sealing cap is slidably plugged into the top of the fixed storage cavity;

[0007] The circulating cooling device comprises a return pipe, a connecting circular hole, an auxiliary transmission pipe and a circulating cooling pipe, wherein the connecting circular hole is opened at the side end of the circulating cooling pipe, the auxiliary transmission pipe is fixedly connected to the side end of the circulating cooling pipe, and the auxiliary transmission pipe is located below the connecting circular hole, and the return pipe is fixedly connected to the side end of the circulating cooling pipe, and the return pipe is located above the connecting circular hole;

[0008] The circulation starting device includes a first transmission gear, a mobile piston rod, a rotating connecting rod, an L-shaped cylinder, a fixed transmission belt and a transmission gear, wherein the transmission gear is equidistantly geared and meshed inside the fixed transmission belt, the rotating connecting rod is rotatably connected to the side end of the transmission gear, the bottom end of the mobile piston rod is rotatably connected to the top end of the rotating connecting rod, and the top end of the mobile piston rod is slidably inserted into the inside of the L-shaped cylinder, and the first transmission gear is fixedly connected to the center of one end of the transmission gear away from the rotating connecting rod;

[0009] The heat dissipation hollow mechanism comprises a rotating heat dissipation device, a supporting and fixing device and an auxiliary isolating device, wherein the rotating heat dissipation device is rotatably connected to the inner center of the supporting and fixing device, the sliding groove of the auxiliary isolating device is plugged into the supporting and fixing device, and the auxiliary isolating device is located at the side end of the rotating heat dissipation device;

[0010] The auxiliary isolation device includes a limit pin, a first protection net, a second protection net, a rotation limit plug rod and a limit movement sliding key, wherein the limit movement sliding key is symmetrically fixedly connected to the bottom ends of the second protection net and the first protection net, the rotation limit plug rod is symmetrically rotationally connected to the bottom of the side ends of the first protection net and the second protection net, and the limit pin is equidistantly fixedly connected to the side end of the second protection net close to the first protection net;

[0011] The rotating heat dissipation device includes a first protective end cover, a fixed gear ring, a rotor, a fixed cleaning sheet, a supporting rotating shaft, a cooling fan, a transmission worm, a second transmission gear and a protective outer cover, wherein the supporting rotating shaft is rotatably connected to the side end center of the first protective end cover, the rotor is fixedly connected to the outer ring of the supporting rotating shaft, the cooling fan is symmetrically fixedly connected to the outer ring of the supporting rotating shaft, and the cooling fan is located on the outside of the rotor, the fixed gear ring is fixedly connected to one end of the outer ring of the supporting rotating shaft, the fixed cleaning sheet is fixedly connected to one end of the outer ring of the supporting rotating shaft away from the fixed gear ring, the protective outer cover is fixedly connected to the side end of the first protective end cover, the second transmission gear is meshed with the side end of the fixed gear ring, and the second transmission gear is located inside the protective outer cover, and the transmission worm is fixedly connected to the side end center of the second transmission gear;

[0012] The supporting and fixing device includes a body shell, a stator, a stator winding, a second protective end cover and a supporting base. The body shell is fixedly connected to the top of the supporting base, the stator is fixedly connected to the inside of the body shell, the stator winding is fixedly connected to the inside of the stator, and the second protective end cover is fixedly installed at one end of the top of the body shell.

[0013] Preferably, heat dissipation grooves are provided on the inner sides of the second protective end cover and the first protective end cover.

[0014] Preferably, a brush handle is fixedly connected to the inner side of the fixed cleaning sheet.

[0015] Preferably, a gap is left between the rotor and stator windings.

[0016] Preferably, the first transmission gear is meshed with the bottom end of the transmission worm.

[0017] Preferably, the interiors of the L-shaped cylinder, the circulating cooling pipe and the fixed receiving cavity are arranged in a hollow state, and the auxiliary transmission pipe and the return pipe are both interconnected with the fixed receiving cavity.

[0018] Preferably, the L-shaped cylinder is fixedly connected inside the connecting circular hole.

[0019] Preferably, when the transmission gear rotates, it drives the rotating connecting rod to rotate, and when the rotating connecting rod rotates, it drives the movable piston rod to slide inside the L-shaped cylinder.

[0020] Preferably, a sliding slot is provided at one inner end of the support base.

[0021] Preferably, the rotating heat dissipation device also includes an auxiliary cleaning plate and a limiting nut, the auxiliary cleaning plate is fixedly connected to the outer ring of the fixed cleaning plate, the limiting nut is threadedly inserted into the outer ring of the supporting rotating shaft, the outer ring of the supporting rotating shaft is provided with a thread that is compatible with the limiting nut, and a ring is fixedly connected to the side end of the fixed cleaning plate.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The cooling protection mechanism is fixedly installed on the outer ring of the heat dissipation hollow mechanism, and a circulation device is fixedly installed inside the cooling protection mechanism. Through the setting of the circulation device, the cooling oil can be circulated inside the cooling protection mechanism, so that the inside of the heat dissipation hollow mechanism can be cooled down. A transmission device is fixedly installed inside the heat dissipation hollow mechanism, and the transmission device can be connected with the circulation device, so that when the permanent magnet motor is started, it can drive the transmission device inside the heat dissipation hollow mechanism to rotate, and while the transmission device is rotating, it can drive the circulation device to work continuously, thereby completing the work of rapidly cooling the surface. The interior of the hollow heat dissipation mechanism adopts a special structure, and a heat dissipation device is fixedly installed inside the hollow heat dissipation mechanism. When the heat dissipation device is started, the high temperature generated inside the hollow heat dissipation mechanism can be quickly diffused outward, thereby reducing the occurrence of demagnetization of the permanent magnet. A cleaning device is fixedly installed on the heat dissipation device. When the heat dissipation device rotates, the cleaning device can be driven to rotate at the same time, thereby avoiding excessive dust accumulation on one end of the hollow heat dissipation mechanism. An isolation device is slidably inserted on one end of the hollow heat dissipation mechanism. Through the setting of the isolation device, external dust can be prevented from entering the interior of the hollow heat dissipation mechanism.

[0024] 2. The internal fixing connection of the rotating heat sink is connected to the contact device. When the rotating heat sink is working, the contact device will contact the protective device inside the heat sink hollow mechanism, so that the inner wall of the protective device can be cleaned, and the internal fixing installation of the rotating heat sink is provided with a limiting device, which can be screwed inwards so that the rotating heat sink can be installed on the supporting rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0027] Figure 2It is a schematic diagram of the side end of the main body of the present invention;

[0028] Figure 3 It is a schematic diagram of the cooling protection mechanism of the present invention;

[0029] Figure 4 It is a schematic diagram of the structure of the circulating cooling device of the present invention;

[0030] Figure 5 It is a schematic structural diagram of the circulation starting device of the present invention;

[0031] Figure 6 It is a schematic diagram of the heat dissipation hollow mechanism of the present invention;

[0032] Figure 7 is a schematic diagram of an auxiliary isolation device of the present invention;

[0033] Figure 8 is a schematic diagram of a rotating heat dissipation device of the present invention;

[0034] Fig. 9 is a schematic diagram of a supporting and fixing device of the present invention;

[0035] Fig.10 It is a schematic diagram of a second embodiment of the rotating heat dissipation device of the present invention.

[0036] In the figure: 1-cooling protection mechanism, 2-heat dissipation hollow mechanism, 3-circulating cooling device, 4-protective housing, 5-fastening sealing cap, 6-fixing storage cavity, 7-circulation starting device, 8-reflux pipe, 9-connecting round hole, 10-auxiliary transmission pipe, 11-circulating cooling pipe, 12-first transmission gear, 13-moving piston rod, 14-rotating connecting rod, 15-L-type cylinder, 16-fixing transmission belt, 17-transmission gear, 18-rotating heat dissipation device, 19-support fixing device, 20-auxiliary isolation device, 21-limiting pin, 22-first protective net, 23-second protective net, 24-rotation limiting plug rod, 25-limiting moving sliding key, 26-first protective end cover, 27-fixed gear ring, 28-rotor, 29-fixed cleaning sheet, 30-support rotating shaft, 31-cooling fan, 32-transmission worm, 33-second transmission gear, 34-protective outer cover, 35-body casing, 36-statator, 37-stator winding, 38-second protective end cover, 39-support base, 40-auxiliary cleaning sheet, 41-limiting nut. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0039] The present invention is further described below in conjunction with the accompanying drawings.

[0040] Example 1

[0041] See also Figure 1-2 , an embodiment provided by the present invention: a low-speed, high-torque variable-frequency speed-regulating permanent magnet motor, comprising a heat dissipation hollow mechanism 2, a cooling protection mechanism 1 is fixedly connected to the outer ring of the heat dissipation hollow mechanism 2;

[0042] like Figure 3 The cooling protection mechanism 1 includes a circulating cooling device 3, a protective casing 4, a fastening sealing cap 5, a fixed storage cavity 6 and a circulating starting device 7. The circulating cooling device 3 is fixedly connected to the inner center of the protective casing 4, the circulating starting device 7 is fixedly installed on one side of the inner part of the protective casing 4, the fixed storage cavity 6 is fixedly connected to the top of the side end of the protective casing 4, and the fixed storage cavity 6 is located above the circulating starting device 7, and the fastening sealing cap 5 is slidably plugged into the top of the fixed storage cavity 6;

[0043] like Figure 4 The circulating cooling device 3 includes a return pipe 8, a connecting circular hole 9, an auxiliary transmission pipe 10 and a circulating cooling pipe 11. The connecting circular hole 9 is opened at the side end of the circulating cooling pipe 11, the auxiliary transmission pipe 10 is fixedly connected to the side end of the circulating cooling pipe 11, and the auxiliary transmission pipe 10 is located below the connecting circular hole 9, and the return pipe 8 is fixedly connected to the side end of the circulating cooling pipe 11, and the return pipe 8 is located above the connecting circular hole 9;

[0044] like Figure 5 The cycle starting device 7 includes a first transmission gear 12, a mobile piston rod 13, a rotating connecting rod 14, an L-shaped cylinder 15, a fixed transmission belt 16 and a transfer gear 17. The transfer gear 17 is equidistantly gear-engaged inside the fixed transmission belt 16. The rotating connecting rod 14 is rotatably connected to the side end of the transfer gear 17. The bottom end of the mobile piston rod 13 is rotatably connected to the top end of the rotating connecting rod 14, and the top end of the mobile piston rod 13 is slidably inserted into the inside of the L-shaped cylinder 15. The first transmission gear 12 is fixedly connected to the center of one end of the transfer gear 17 away from the rotating connecting rod 14.

[0045] like Figure 6 The heat dissipation hollow mechanism 2 includes a rotating heat dissipation device 18, a supporting fixture 19 and an auxiliary isolation device 20. The rotating heat dissipation device 18 is rotatably connected to the inner center of the supporting fixture 19. The sliding groove of the auxiliary isolation device 20 is inserted into the supporting fixture 19, and the auxiliary isolation device 20 is located at the side end of the rotating heat dissipation device 18.

[0046] like Figure 7 The auxiliary isolation device 20 includes a limit pin 21, a first protection net 22, a second protection net 23, a rotation limit plug rod 24 and a limit movement slide key 25. The limit movement slide key 25 is symmetrically fixedly connected to the bottom ends of the second protection net 23 and the first protection net 22, the rotation limit plug rod 24 is symmetrically rotationally connected to the bottom of the side ends of the first protection net 22 and the second protection net 23, and the limit pin 21 is equidistantly fixedly connected to the side end of the second protection net 23 close to the first protection net 22;

[0047] like Figure 8 The rotating heat dissipation device 18 includes a first protective end cover 26, a fixed gear ring 27, a rotor 28, a fixed cleaning sheet 29, a supporting rotating shaft 30, a cooling fan 31, a transmission worm 32, a second transmission gear 33 and a protective outer cover 34. The supporting rotating shaft 30 is rotatably connected to the side end center of the first protective end cover 26, the rotor 28 is fixedly connected to the outer ring of the supporting rotating shaft 30, the cooling fan 31 is symmetrically fixedly connected to the outer ring of the supporting rotating shaft 30, and the cooling fan 31 is located on the outside of the rotor 28, the fixed gear ring 27 is fixedly connected to one end of the outer ring of the supporting rotating shaft 30, the fixed cleaning sheet 29 is fixedly connected to one end of the outer ring of the supporting rotating shaft 30 away from the fixed gear ring 27, the protective outer cover 34 is fixedly connected to the side end of the first protective end cover 26, the second transmission gear 33 is gear-engaged on the side end of the fixed gear ring 27, and the second transmission gear 33 is located inside the protective outer cover 34, and the transmission worm 32 is fixedly connected to the side end center of the second transmission gear 33;

[0048] like Fig. 9The supporting and fixing device 19 includes a body casing 35, a stator 36, a stator winding 37, a second protective end cover 38 and a supporting base 39. The body casing 35 is fixedly connected to the top of the supporting base 39, the stator 36 is fixedly connected to the inside of the body casing 35, the stator winding 37 is fixedly connected to the inside of the stator 36, and the second protective end cover 38 is fixedly installed at one end of the top of the body casing 35.

[0049] Heat dissipation grooves are provided on the inner sides of the second protective end cover 38 and the first protective end cover 26, a brush handle is fixedly connected to the inner side of the fixed cleaning sheet 29, a gap is left between the rotor 28 and the stator winding 37, the first transmission gear 12 is meshed with the bottom end of the transmission worm 32, the interior of the L-shaped cylinder 15, the circulating cooling pipe 11 and the fixed storage cavity 6 are arranged in a hollow state, and the auxiliary transmission pipeline 10 and the reflux pipeline 8 are both interconnected with the fixed storage cavity 6, the L-shaped cylinder 15 is fixedly connected to the inside of the connecting circular hole 9, and when the transmission gear 17 rotates, it drives the rotating connecting rod 14 to rotate, and the rotating connecting rod 14 drives the moving piston rod 13 to slide inside the L-shaped cylinder 15 while rotating, and a sliding slot is provided at one end of the interior of the support base 39.

[0050] When the present embodiment is implemented and used, the present device can be placed in a designated working area first, and then cooling oil can be poured into the interior of the fixed storage cavity 6. When the supporting rotating shaft 30 starts to rotate, the cooling fan 31 is symmetrically fixedly installed on the outer ring of the supporting rotating shaft 30, and the first protective end cover 26 and the second protective end cover 38 are provided with heat dissipation grooves inside. When the supporting rotating shaft 30 drives the cooling fan 31 to rotate, the natural wind from the outside can be sucked in from the second protective end cover 38, passed between the stator winding 37 and the rotor 28, and finally discharged from the first protective end cover 26. A gap is left between the rotor 28 and the stator winding 37. When the natural wind continuously passes through the rotor 28 and the stator winding 37, the heat generated by the stator winding 37 and the rotor 28 can be reduced. Temperature, through the fixed cleaning sheet 29 is fixedly connected to one end of the supporting rotating shaft 30, and the side end of the fixed cleaning sheet 29 is fixedly connected with a brush handle, when the supporting rotating shaft 30 is rotating, it can drive the fixed cleaning sheet 29 to rotate, and when the fixed cleaning sheet 29 is rotating, it can drive the brush handle to rotate continuously on the outer side of the second protective end cover 38, so that the dust attached to the side end of the second protective end cover 38 can be removed. At the same time, through the rotating limit plug 24 symmetrically threaded through the support base 39 rotatably connected to the side ends of the second protective net 23 and the first protective net 22, the rotating limit plug 24 can be screwed inwards respectively, so that the first protective net 22 and the second protective net 23 can be driven to move continuously inwards, through the setting of the first protective net 22 and the second protective net 23 , which can isolate foreign matter from entering between the rotor 28 and the stator winding 37. At the same time, the limiting movable sliding key 25 is fixedly connected to the bottom ends of the first protective net 22 and the second protective net 23 respectively, and a sliding card slot is provided at one end of the inner side of the support base 39. The limiting movable sliding key 25 is slidably inserted into the inner side of the sliding card slot, so that the first protective net 22 and the second protective net 23 can move along a straight line, thereby improving the docking accuracy of the first protective net 22 and the second protective net 23. The limiting latch 21 is equidistantly fixedly connected to the side end of the second protective net 23. When the second protective net 23 moves inward to contact with the first protective net 22, the limiting latch 21 will be inserted into the inner side of the first protective net 22, thereby avoiding the first protective net 22 and the second protective net 23 from being connected. The second protection net 23 shakes when performing protection work. To complete the protection work, it is fixedly connected to one end of the outer ring of the supporting rotating shaft 30 through the fixed gear ring 27, and the second transmission gear 33 is gear-engaged with the side end of the fixed gear ring 27. When the fixed gear ring 27 rotates, the second transmission gear 33 can be driven to rotate at the same time. It is fixedly connected to the side end center of the second transmission gear 33 through the transmission worm 32. When the second transmission gear 33 rotates, the transmission worm 32 can be driven to rotate, and the first transmission gear 12 is gear-engaged with the bottom end of the transmission worm 32. When the transmission worm 32 rotates, the first transmission gear 12 can be driven to rotate continuously. The fixed transmission belt 16 gear is geared on the outer ring of the transmission gear 17.The first transmission gear 12 is fixedly connected to the side end of the transmission gear 17 at one end inside the fixed transmission belt 16. When the first transmission gear 12 rotates, it can drive the fixed transmission belt 16 and the transmission gear 17 to rotate at the same time. It is rotatably connected to the other side of the transmission gear 17 through the rotating connecting rod 14, and the bottom end of the mobile piston rod 13 is rotatably connected to the rotating connecting rod 14. The top end of the mobile piston rod 13 is slidably inserted into the inside of the L-shaped cylinder 15. When the transmission gear 17 rotates, it can drive the mobile piston rod 13 to continuously stretch up and down inside the L-shaped cylinder 15, so that the gas inside the L-shaped cylinder 15 can be compressed and pushed forward. The L-shaped cylinder 15 is fixedly connected to the connecting circular hole 9, and the circulating cooling pipe 11 and the fixed storage cavity 6 are arranged in a hollow state, so that the auxiliary transmission pipeline 1 0 and the return pipe 8 are respectively connected to the fixed storage cavity 6. When the moving piston rod 13 pushes the gas inside the L-shaped cylinder 15, the cooling oil inside the fixed storage cavity 6 will flow from the inside of the auxiliary transmission pipe 10 into the inside of the circulating cooling pipe 11. As the L-shaped cylinder 15 is continuously pressurized, the cooling oil can flow through the inside of the circulating cooling pipe 11 for a circle, and fit with the outer ring of the stator 36 through the bottom end of the circulating cooling pipe 11. Therefore, when the cooling oil passes through the inside of the circulating cooling pipe 11, the stator 36 can be cooled. When the cooling oil flows through the inside of the circulating cooling pipe 11 completely, it can be discharged into the inside of the fixed storage cavity 6 through the return pipe 8. By moving the piston rod 13 continuously up and down inside the L-shaped cylinder 15, the circulating cooling work can be completed to prevent the demagnetization phenomenon inside.

[0051] Example 2

[0052] On the basis of Example 1, Fig.10 As shown, the rotating heat dissipation device 18 also includes an auxiliary cleaning sheet 40 and a limiting nut 41. The auxiliary cleaning sheet 40 is fixedly connected to the outer ring of the fixed cleaning sheet 29. The limiting nut 41 is threadedly inserted into the outer ring of the supporting rotating shaft 30. The outer ring of the supporting rotating shaft 30 is provided with a thread that is compatible with the limiting nut 41. A ring is fixedly connected to the side end of the fixed cleaning sheet 29.

[0053] When this embodiment is implemented, a ring is fixedly connected to one end of the fixed cleaning sheet 29, and the ring can be buckled on the supporting rotating shaft 30, and a thread compatible with the limiting nut 41 is opened on the supporting rotating shaft 30, and the limiting nut 41 can be screwed inward until the fixed cleaning sheet 29 is fixed on the limiting ring at the rear end of the supporting rotating shaft 30, so that the fixed cleaning sheet 29 can be easily disassembled or installed, and the auxiliary cleaning sheet 40 is fixedly connected to the outer ring of the fixed cleaning sheet 29. When the supporting rotating shaft 30 rotates, the auxiliary cleaning sheet 40 can be driven to contact the inner wall of the second protective end cover 38, so that the dust and impurities sticking to the inner wall of the second protective end cover 38 can be removed.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-speed, high-torque variable-frequency speed-regulating permanent magnet motor, comprising a heat dissipation hollow structure (2), characterized in that: A cooling protection mechanism (1) is fixedly connected to the outer ring of the heat dissipation hollow mechanism (2); The cooling protection mechanism (1) comprises a circulating cooling device (3), a protective casing (4), a fastening sealing cap (5), a fixed storage cavity (6) and a circulating starting device (7), wherein the circulating cooling device (3) is fixedly connected to the inner center of the protective casing (4), the circulating starting device (7) is fixedly installed on one side of the inner part of the protective casing (4), the fixed storage cavity (6) is fixedly connected to the top of the side end of the protective casing (4), and the fixed storage cavity (6) is located above the circulating starting device (7), and the fastening sealing cap (5) is slidably plugged into the top of the fixed storage cavity (6); The circulating cooling device (3) comprises a return pipe (8), a connecting circular hole (9), an auxiliary transmission pipe (10) and a circulating cooling pipe (11), wherein the connecting circular hole (9) is provided at a side end of the circulating cooling pipe (11), the auxiliary transmission pipe (10) is fixedly connected to the side end of the circulating cooling pipe (11), and the auxiliary transmission pipe (10) is located below the connecting circular hole (9), and the return pipe (8) is fixedly connected to the side end of the circulating cooling pipe (11), and the return pipe (8) is located above the connecting circular hole (9); The cyclic starting device (7) comprises a first transmission gear (12), a movable piston rod (13), a rotating connecting rod (14), an L-shaped cylinder (15), a fixed transmission belt (16) and a transmission gear (17), wherein the transmission gear (17) is equidistantly gear-engaged inside the fixed transmission belt (16), the rotating connecting rod (14) is rotationally connected to the side end of the transmission gear (17), the bottom end of the movable piston rod (13) is rotationally connected to the top end of the rotating connecting rod (14), and the top end of the movable piston rod (13) is slidably inserted into the inside of the L-shaped cylinder (15), and the first transmission gear (12) is fixedly connected to the transmission gear (17) away from the top end. The center of one end of the rotating connecting rod (14); when the transmission gear (17) rotates, the rotating connecting rod (14) is driven to rotate, and when the rotating connecting rod (14) rotates, the movable piston rod (13) is driven to slide inside the L-shaped cylinder (15); the interior of the L-shaped cylinder (15), the circulating cooling pipe (11) and the fixed storage cavity (6) are arranged in a hollow state, and the auxiliary transmission pipeline (10) and the return pipeline (8) are both interconnected with the fixed storage cavity (6); the first transmission gear (12) is meshed with the bottom end of the transmission worm (32); the L-shaped cylinder (15) is fixedly connected to the inside of the connecting circular hole (9); The heat dissipation hollow structure (2) comprises a rotating heat dissipation device (18), a supporting and fixing device (19) and an auxiliary isolating device (20); the rotating heat dissipation device (18) is rotatably connected to the inner center of the supporting and fixing device (19); the sliding groove of the auxiliary isolating device (20) is inserted into the supporting and fixing device (19); and the auxiliary isolating device (20) is located at the side end of the rotating heat dissipation device (18); The auxiliary isolation device (20) comprises a limit pin (21), a first protection net (22), a second protection net (23), a rotation limit rod (24) and a limit movement slide key (25), wherein the limit movement slide key (25) is symmetrically fixedly connected to the bottom ends of the second protection net (23) and the first protection net (22), the rotation limit rod (24) is symmetrically rotationally connected to the bottom ends of the side ends of the first protection net (22) and the second protection net (23), and the limit pin (21) is equidistantly fixedly connected to the side end of the second protection net (23) close to the first protection net (22); The rotating heat dissipation device (18) comprises a first protective end cover (26), a fixed gear ring (27), a rotor (28), a fixed cleaning sheet (29), a supporting rotating shaft (30), a heat dissipation fan (31), a transmission worm (32), a second transmission gear (33) and a protective outer cover (34), wherein the supporting rotating shaft (30) is rotatably connected to the side end center of the first protective end cover (26), the rotor (28) is fixedly connected to the outer ring of the supporting rotating shaft (30), the heat dissipation fan (31) is symmetrically fixedly connected to the outer ring of the supporting rotating shaft (30), and the heat dissipation fan (31) is located The fixed gear ring (27) is fixedly connected to one end of the outer ring of the supporting rotating shaft (30), the fixed cleaning sheet (29) is fixedly connected to one end of the outer ring of the supporting rotating shaft (30) away from the fixed gear ring (27), the protective cover (34) is fixedly connected to the side end of the first protective end cover (26), the second transmission gear (33) is meshed with the side end of the fixed gear ring (27), and the second transmission gear (33) is located inside the protective cover (34), and the transmission worm (32) is fixedly connected to the center of the side end of the second transmission gear (33); The supporting and fixing device (19) comprises a machine body shell (35), a stator (36), a stator winding (37), a second protective end cover (38) and a supporting base (39); the machine body shell (35) is fixedly connected to the top of the supporting base (39); the stator (36) is fixedly connected to the inside of the machine body shell (35); the stator winding (37) is fixedly connected to the inside of the stator (36); and the second protective end cover (38) is fixedly mounted on one end of the top of the machine body shell (35); the inner sides of the second protective end cover (38) and the first protective end cover (26) are provided with heat dissipation grooves; and one end of the inner side of the supporting base (39) is provided with a sliding slot; The rotating heat dissipation device (18) further comprises an auxiliary cleaning sheet (40) and a limiting nut (41); the auxiliary cleaning sheet (40) is fixedly connected to the outer ring of the fixed cleaning sheet (29); the limiting nut (41) is threadedly inserted into the outer ring of the supporting rotating shaft (30); the outer ring of the supporting rotating shaft (30) is provided with a thread matching the limiting nut (41); a collar is fixedly connected to the side end of the fixed cleaning sheet (29); a brush handle is fixedly connected to the inner side of the fixed cleaning sheet (29); and a gap is left between the rotor (28) and the stator winding (37).

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