A low-speed, high-power permanent magnet synchronous all-in-one machine

Abstract

The present invention belongs to the technical field of permanent magnet synchronous motors, and in particular to a low-speed, high-power permanent magnet synchronous integrated machine. In view of the time-consuming and labor-intensive problem in the prior art of replacing the starting contact piece, the following scheme is proposed, including a motor housing that is cast into an integral circular tubular structure, a stator winding is fixed to the circumferential inner wall of the motor housing, and the middle of the stator winding is connected to a rotor winding structure, the rotor winding structure includes a motor shaft, and a front cover and a rear cover are fixed to the front and rear end openings of the motor housing, respectively. The present invention can adjust the downward pressure between the end of the metal slide rail and the conductive ring, and when the metal slide rail needs to be replaced, it is only necessary to withdraw the metal slide rail from the rectangular hole, and the three pressure rods can also be tilted after the motor shaft rotates normally to avoid the metal protrusion from being in contact with the high-speed rotating conductive ring, thereby fundamentally reducing the wear of the electrical contact piece.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet synchronous motors, and in particular to a low-speed high-power permanent magnet synchronous all-in-one machine. Background Art

[0002] Permanent magnet synchronous motors have been widely used in the fields of motors and generators due to their compact structure, high power density, high working efficiency, and significant energy saving and consumption reduction benefits. In recent years, the industrial field has an increasingly urgent demand for equipment that uses permanent magnet synchronous motors to directly drive loads. The widespread application of these permanent magnet motor direct-drive equipment will produce immeasurable energy-saving benefits.

[0003] As we all know, the permanent magnet synchronous motors in the prior art inevitably need to use a variable frequency speed regulator to start the motor, that is, when stationary, three-phase alternating current is passed through the stator winding to generate a stator rotating magnetic field; the stator rotating magnetic field is equivalent to the rotor rotation, generating an induced current in the cage winding to form a rotor rotating magnetic field. The two magnetic fields interact with each other to generate torque, causing the rotor to start rotating from a standstill; directly jumping from the static pressure contact to high-speed sliding will cause a large loss of the contact piece, so the starting contact piece needs to be adjusted or replaced after a period of use; the traditional replacement method requires the outer cover to be removed and then replaced and adjusted, which is very inconvenient, so we propose a new type of permanent magnet synchronous integrated machine that can be operated quickly. Summary of the invention

[0004] In view of the technical problem in the prior art that it is time-consuming and laborious to replace the starting contact piece, the present invention adopts the following technical solution:

[0005] A low-speed, high-power permanent magnet synchronous all-in-one machine comprises a motor housing that is cast into an integral circular tubular structure, a stator winding is fixed to the circumferential inner wall of the motor housing, and a rotor winding structure is rotatably connected to the middle of the stator winding, and the rotor winding structure comprises a motor shaft, a front cover and a rear cover are respectively fixed to the front and rear end openings of the motor housing, and a sliding bearing that matches the diameter of the motor shaft is embedded in the middle of the front cover, and a bearing positioning frame is fixed to one end of the circumferential inner wall of the motor housing close to the front cover; a slip ring fixing sleeve is sleeved and fixed to the circumferential outer wall of the motor shaft close to the front cover, and three annular grooves are opened on the circumferential outer wall of the slip ring fixing sleeve, and conductive rings are sleeved in the three annular grooves, and the circumferences of the three conductive rings are The inner wall is electrically connected to a driving wire; the other end of the driving wire is connected to the rotor winding structure; three rectangular holes of the same size are opened on the circumferential outer wall of the motor housing near the end of the slip ring fixing sleeve, and the central angles of the three rectangular holes are all 120 degrees, and an external fixing block is fixed to the outer wall of the motor housing at the end of each of the rectangular holes, and a hinge seat is fixed at the corresponding position of the inner wall of the motor housing and the external fixing block, and a pressure rod extending to the corresponding outer wall of the conductive ring is rotatably connected in the hinge seat, a metal slide rail is slidably sleeved on the end of the pressure rod near the conductive ring, and a wear-resistant metal protrusion in contact with the surface of the conductive ring is fixed on the end of the metal slide rail near the conductive ring; a compression spring is fixed between the end of the pressure rod away from the conductive ring and the surface of the external fixing block.

[0006] By providing a pressure rod hinged in the rectangular hole and a metal slide rail slidably sleeved on the end of the pressure rod, not only can the downward pressure between the end of the metal slide rail and the conductive ring be adjusted, but also when the metal slide rail needs to be replaced, it is only necessary to withdraw the metal slide rail from the rectangular hole. In addition, the three pressure rods can be tilted up after the motor shaft rotates normally to avoid the metal protrusion from being in contact with the high-speed rotating conductive ring, thereby fundamentally reducing the wear of the electrical contact sheet.

[0007] Preferably, an annular groove is reserved on the circumferential outer wall of the conductive ring, and the cross section of the annular groove matches the position of the convex head of the metal bump, thereby increasing the contact area and improving the conductive effect.

[0008] Preferably, a groove is formed on the side of the pressure rod away from the hinge seat, and a back-stopping tooth groove is arranged in the groove, and a clamping tooth rod is reserved at one end of the metal slide rail away from the conductive ring, and the clamping tooth rod and the back-stopping tooth groove are meshed with each other.

[0009] Preferably, a spring groove is opened on one side of the outer fixing block close to the pressure rod, and an electromagnet is provided at the bottom of the spring groove. When the motor is officially powered on and rotated, only three electromagnets need to be energized, and then three metal slide rails in contact with the conductive ring can be lifted.

[0010] Preferably, a plurality of heat dissipation ribs parallel to each other are fixed to the outer wall of the motor housing; an outer hexagonal sleeve is sleeved and fixed to one end of the motor housing close to the external fixing block, and an extension block is fixed to one end of the outer hexagonal sleeve close to the rear cover, and motor brackets are fixed on both sides of the extension block, and the outer hexagonal sleeve is welded and fixed to the outer wall of the motor housing; by providing a motor bracket integrally formed with the outer hexagonal sleeve, the stability of the device can be improved.

[0011] Preferably, the outer hexagonal sleeve is provided with three inspection notches on the side close to the front end cover, which are matched with the size and position of the corresponding external fixing blocks, and an anti-slip slot is provided on the side of the inspection notch away from the motor housing, and an outer cover is fixedly sleeved on the open end of the circumferential outer wall of the motor housing close to the inspection notch, and three bending covers symmetrically distributed in the center are folded at the edge of the outer cover, and the bending covers are slidably inserted in the three anti-slip slots; and strip holes are provided on the bending cover; by providing an outer cover with a bending cover, not only can larger debris be prevented from being entangled in the motor housing, but also the heat dissipation inside the motor housing will not be affected.

[0012] Preferably, three screw blocks are provided on the side of the circumferential inner wall of the motor housing close to the front end cover, and a positioning block engaged with the screw block is reserved on the side of the front end cover close to the motor housing, and a screw hole adapted to the screw block is opened near the positioning block of the front end cover; a positioning bolt for fixing the front end cover is screwed between the screw hole and the screw block, which can not only tightly fix the front end cover to the end of the motor housing, but also ensure that the axis center line of the sliding bearing always remains coaxial with the motor shaft.

[0013] Preferably, an elliptical wheel and a cooling fan are fixed to one end of the motor shaft close to the bearing positioning frame, and the inner wall of the motor housing is configured as an angular straight structure, which can ensure good ventilation effect at both ends of the motor housing.

[0014] Preferably, the back cover is provided with a plurality of circular holes, and a mesh hole 1 is also provided on the back cover; parallel and vertical anti-slip grooves are provided on the surface of the back cover near the left and right sides, and anti-slip sliders are slidably connected in the anti-slip grooves, and the same shaking mesh cover is fixed on the side of the two anti-slip sliders away from the bottom of the groove, and a mesh hole 2 matching the mesh hole 1 is provided on the surface of the shaking mesh cover.

[0015] Preferably, the outer wall of the motor housing is provided with a shoulder plane matched with the position of the elliptical wheel at one end close to the shaking mesh cover, and a sliding bearing No. 2 with its center line pointing directly to the elliptical wheel is embedded on the shoulder plane, a U-shaped push rod is slidably connected to the sliding bearing No. 2, and a clamping wheel is provided at the end of the U-shaped push rod close to the elliptical wheel, and the end of the U-shaped push rod away from the elliptical wheel is fixed on the shaking mesh cover; a spring cover is fixed at the corner of the U-shaped push rod close to the shoulder plane, and a reset spring is provided between the spring cover and the shoulder plane; through the provided U-shaped push rod and the elliptical wheel, when the motor is started, the shaking mesh cover can be driven to move up and down at high speed at the same time, thereby forming shearing to prevent debris from being sucked into the interior of the motor housing.

[0016] The beneficial effects of the present invention are:

[0017] 1. By providing a pressure rod hinged in the rectangular hole and a metal slide rail slidably sleeved on the end of the pressure rod, not only can the downward pressure between the end of the metal slide rail and the conductive ring be adjusted, but also when the metal slide rail needs to be replaced, it is only necessary to withdraw the metal slide rail from the rectangular hole. In addition, the three pressure rods can be tilted up after the motor shaft rotates normally to avoid the metal protrusion from being in contact with the high-speed rotating conductive ring, thereby fundamentally reducing the wear of the electrical contact sheet.

[0018] 2. By setting the locking gear rod and the stop groove, the metal slide rail and the pressure rod can be kept in close contact for a long time without the need for screw connection, and it is also convenient to disengage.

[0019] 3. The shaking mesh cover can move up and down at high speed during heat dissipation, which can prevent flying insects or other objects from being sucked into the motor casing and protect the internal parts of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a low-speed, high-power permanent magnet synchronous all-in-one machine proposed by the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of a low-speed, high-power permanent magnet synchronous all-in-one machine proposed by the present invention from a bottom-up perspective;

[0022] Figure 3 A half-cutaway three-dimensional structural schematic diagram of a low-speed, high-power permanent magnet synchronous all-in-one machine proposed by the present invention;

[0023] Figure 4 This is a schematic diagram of the assembly structure of a shaking mesh cover in a low-speed, high-power permanent magnet synchronous all-in-one machine proposed by the present invention;

[0024] Figure 5This is a schematic diagram of the assembly structure of the outer hexagonal sleeve in a low-speed, high-power permanent magnet synchronous all-in-one machine proposed by the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of an elliptical wheel and a heat dissipation fan in a low-speed, high-power permanent magnet synchronous all-in-one machine proposed by the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of a conductive ring in a low-speed, high-power permanent magnet synchronous all-in-one machine proposed by the present invention;

[0027] Figure 8 This is a schematic diagram of the overall structure of a motor housing in a low-speed, high-power permanent magnet synchronous all-in-one machine proposed by the present invention.

[0028] In the figure: 1. motor housing; 101. shoulder plane; 102. rectangular hole; 103. external fixing block; 104. hinge seat; 105. spring sink; 2. rear cover; 3. anti-slip slide groove; 4. U-shaped support rod; 5. reset spring; 6. spring cover; 7. motor bracket; 8. external hexagonal sleeve; 801. maintenance notch; 802. anti-slip slot; 9. external cover; 901. strip hole; 902. bending cover; 10. rotor winding structure; 11. sliding bearing 1; 12. front cover; 121. positioning block; 13. heat dissipation rib; 14. shaking net cover; 15. heat dissipation fan; 16. elliptical wheel;

[0029] 17. Bearing positioning frame; 18. Stator winding; 19. Slip ring fixing sleeve; 20. Conductive ring;

[0030] 21. Round hole; 22. Second sliding bearing; 23. Clamping wheel; 24. Anti-slip slider; 25. Pressure rod; 26. Driving wire; 27. Metal slide rail. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] In the present invention, reference is made to Figure 1-Figure 8A low-speed high-power permanent magnet synchronous integrated machine includes a motor housing 1 that is cast into a circular tubular structure as a whole, a stator winding 18 is fixed to the circumferential inner wall of the motor housing 1, and a rotor winding structure 10 is rotatably connected to the middle of the stator winding 18, and the rotor winding structure 10 includes a motor shaft, a front cover 12 and a rear cover 2 are respectively fixed to the front and rear end openings of the motor housing 1, and a sliding bearing 11 that matches the diameter of the motor shaft is embedded in the middle of the front cover 12, and a bearing positioning The motor shaft is provided with a slip ring fixing sleeve 19 on its circumferential outer wall near the front end cover 12, and the slip ring fixing sleeve 19 is provided with three annular grooves on its circumferential outer wall, in which conductive rings 20 are provided, and the circumferential inner walls of the three conductive rings 20 are electrically connected with driving wires 26; the other end of the driving wires 26 is connected to the rotor winding structure 10; the motor housing 1 is provided with three rectangular holes 102 of the same size on its circumferential outer wall near the slip ring fixing sleeve 19, and the central angles of the three rectangular holes 102 are all 120 degrees, and the electric The outer wall of the motor housing 1 is fixed with an external fixing block 103 at the end of each rectangular hole 102, and the inner wall of the motor housing 1 and the corresponding position of the external fixing block 103 are fixed with an articulated seat 104, and the articulated seat 104 is rotatably connected with a pressure rod 25 extending to the outer wall of the corresponding conductive ring 20, and the end of the pressure rod 25 close to the conductive ring 20 is slidably sleeved with a metal slide rail 27, and the end of the metal slide rail 27 close to the conductive ring 20 is fixed with a wear-resistant metal protrusion in contact with the surface of the conductive ring 20; the end of the pressure rod 25 away from the conductive ring 20 is connected to the external fixing block 103. A compression spring is fixed between the surfaces; by providing a pressure rod 25 hinged in the rectangular hole 102 and a metal slide rail 27 slidably sleeved on the end of the pressure rod 25, not only can the downward pressure between the end of the metal slide rail 27 and the conductive ring 20 be adjusted, but also when the metal slide rail 27 needs to be replaced, it is only necessary to withdraw the metal slide rail 27 from the rectangular hole 102, and the three pressure rods 25 can also be tilted after the motor shaft rotates normally to avoid the metal bump from being in constant contact with the high-speed rotating conductive ring 20, thereby fundamentally reducing the wear of the electrical contact sheet.

[0033] In the present invention, an annular groove is reserved on the circumferential outer wall of the conductive ring 20, and the cross section of the annular groove matches the position of the convex head of the metal bump, thereby increasing the contact area and improving the conductive effect.

[0034] Please refer to Figure 7 A groove is formed on the side of the pressure rod 25 away from the hinge seat 104, and a back-stopping tooth groove is arranged in the groove, and a clamping gear rod is reserved at the end of the metal slide rail 27 away from the conductive ring 20, and the clamping gear rod and the back-stopping tooth groove are meshed with each other. By setting the clamping gear rod and the back-stopping tooth groove, the metal slide rail 27 and the pressure rod 25 can be ensured to be in close contact for a long time without the need for screw connection, and it is also convenient to disengage.

[0035] Please refer to Figure 8 A spring groove 105 is opened on one side of the outer fixing block 103 close to the pressure rod 25, and an electromagnet is set at the bottom of the spring groove 105. When the motor is officially powered on and rotated, only three electromagnets need to be energized, and then the three metal slide rails 27 in contact with the conductive ring 20 can be lifted.

[0036] Please refer to Figure 5 A plurality of mutually parallel heat dissipation ribs 13 are fixed to the outer wall of the motor housing 1; an outer hexagonal sleeve 8 is sleeved and fixed to one end of the motor housing 1 close to the external fixing block 103, and an extension block is fixed to one end of the outer hexagonal sleeve 8 close to the rear cover 2, and motor brackets 7 are fixed on both sides of the extension block, and the outer hexagonal sleeve 8 is welded and fixed to the outer wall of the motor housing 1; by providing a motor bracket 7 integrally formed with the outer hexagonal sleeve 8, the stability of the device can be improved.

[0037] Please refer to Figure 5-Figure 6 The outer hexagonal sleeve 8 is provided with three maintenance notches 801 on the side close to the front end cover 12, which are matched with the size and position of the corresponding external fixing block 103, and the maintenance notch 801 is provided with an anti-slipping slot 802 on the side away from the motor housing 1. The outer cover 9 is fixedly sleeved on the open end of the circumferential outer wall of the motor housing 1 close to the maintenance notch 801, and three bending covers 902 symmetrically distributed at the edge of the outer cover 9 are folded, and the bending covers 902 are slidably inserted in the three anti-slipping slots 802; and the bending covers 902 are provided with strip holes 901; the outer cover 9 with the bending covers 902 can not only prevent larger debris from being entangled in the motor housing 1, but also will not affect the heat dissipation inside the motor housing 1.

[0038] Please refer to Figure 5-Figure 6 Three screw blocks are arranged on the side of the circumferential inner wall of the motor housing 1 close to the front end cover 12, and a positioning block 121 engaged with the screw block is reserved on the side of the front end cover 12 close to the motor housing 1, and a screw hole matched with the screw block is opened near the positioning block 121 of the front end cover 12; a positioning bolt for fixing the front end cover 12 is screwed between the screw hole and the screw block, which can not only tightly fix the front end cover 12 to the end of the motor housing 1, but also ensure that the axis line of the sliding bearing 11 always remains coaxial with the motor shaft.

[0039] Please refer to Figure 2-Figure 4 An elliptical wheel 16 and a cooling fan 15 are fixed to one end of the motor shaft near the bearing positioning frame 17, and the inner wall of the motor housing 1 is set to an angular straight structure, which can ensure good ventilation effect at both ends of the motor housing 1.

[0040] Please refer to Figure 2-Figure 4, a plurality of circular holes 21 are formed on the back cover 2, and a mesh hole 1 is also formed on the back cover 2; parallel and vertical anti-slip grooves 3 are formed on the surface of the back cover 2 near the left and right sides, and anti-slip sliders 24 are slidably connected in the anti-slip grooves 3, and the same shaking net cover 14 is fixed on the side of the two anti-slip sliders 24 away from the bottom of the groove, and a mesh hole 2 that matches the mesh hole 1 is formed on the surface of the shaking net cover 14; the shaking net cover 14 can be moved up and down at high speed during heat dissipation, which can prevent flying insects or other objects from being sucked into the inside of the motor housing 1, thereby protecting the internal parts of the motor.

[0041] Please refer to Figure 2-Figure 4 The outer wall of the motor housing 1 is provided with a shoulder plane 101 that matches the position of the elliptical wheel 16 at one end near the shaking mesh cover 14, and a sliding bearing 22 with a center line pointing directly to the elliptical wheel 16 is embedded on the shoulder plane 101, and a U-shaped push rod 4 is slidably connected in the sliding bearing 22, and a tightening wheel 23 is provided at one end of the U-shaped push rod 4 near the elliptical wheel 16, and the end of the U-shaped push rod 4 away from the elliptical wheel 16 is fixed on the shaking mesh cover 14; a spring stop cover 6 is fixed at the corner of the U-shaped push rod 4 near the shoulder plane 101, and a reset spring 5 is provided between the spring stop cover 6 and the shoulder plane 101; through the U-shaped push rod 4 and the elliptical wheel 16, when the motor is started, the shaking mesh cover 14 can be driven to move up and down at a high speed at the same time, thereby forming shearing to prevent debris from being sucked into the interior of the motor housing 1.

[0042] When the device is in use and needs to be started, the motor is first started by the variable frequency speed regulator. At this time, three-phase alternating current is passed through the stator winding to generate a stator rotating magnetic field, that is, the three metal slide rails 27 are respectively energized, and the rotor winding structure begins to rotate slowly until the frequency is slowly adjusted to the normal input voltage; at this time, the three electromagnets are energized at the same time, and the three metal slide rails 27 in contact with the conductive ring 20 can be tilted; then the normal voltage is passed again to rotate synchronously; a pressure rod 25 hinged in the rectangular hole 102 and a metal slide rail 27 slidably sleeved on the end of the pressure rod 25 are provided, which can not only adjust the downward pressure between the end of the metal slide rail 27 and the conductive ring 20, but also when the metal slide rail 27 needs to be replaced, it only needs to be withdrawn from the rectangular hole 102; the shaking net cover 14 is provided, which moves up and down at high speed during heat dissipation, can prevent flying insects or other objects from being sucked into the inside of the motor housing 1, and protect the internal parts of the motor.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A low-speed high-power permanent magnet synchronous all-in-one machine, comprising a motor housing (1) cast in an integrally cylindrical structure, a stator winding (18) being fixed to the circumferential inner wall of the motor housing (1), and a rotor winding structure (10) being rotatably connected in the middle of the stator winding (18), characterized in that: The rotor winding structure (10) comprises a motor shaft, a front end cover (12) and a rear cover (2) are fixed at the front and rear end openings of the motor housing (1), respectively, and a sliding bearing (11) matching the diameter of the motor shaft is embedded in the middle of the front end cover (12), and a bearing positioning frame (17) is fixed to one end of the circumferential inner wall of the motor housing (1) close to the front end cover (12); a slip ring fixing sleeve (19) is sleeved and fixed to the circumferential outer wall of the motor shaft close to the front end cover (12), and the circumferential outer wall of the slip ring fixing sleeve (19) is provided with three annular grooves, and conductive rings (20) are sleeved in the three annular grooves, and the circumferential inner walls of the three conductive rings (20) are electrically connected to drive wires (26); the other end of the drive wire (26) is connected to the rotor winding structure (10); the circumferential outer wall of the motor housing (1) close to the slip ring fixing sleeve ( 19) is provided with three rectangular holes (102) of the same size at one end, and the central angles between the three rectangular holes (102) are all 120 degrees, an outer fixing block (103) is fixed to the outer wall of the motor housing (1) at the end of each of the rectangular holes (102), and a hinge seat (104) is fixed to the inner wall of the motor housing (1) at the corresponding position of the outer fixing block (103), and a pressure rod (25) extending toward the outer wall of the corresponding conductive ring (20) is rotatably connected in the hinge seat (104), and a metal slide rail (27) is slidably sleeved at one end of the pressure rod (25) close to the conductive ring (20), and a wear-resistant metal protrusion contacting the surface of the conductive ring (20) is fixed at one end of the metal slide rail (27) close to the conductive ring (20); a compression spring is fixed between the end of the pressure rod (25) away from the conductive ring (20) and the surface of the outer fixing block (103).

2. The low-speed, high-power permanent magnet synchronous all-in-one machine according to claim 1, characterized in that: An annular groove is reserved on the circumferential outer wall of the conductive ring (20), and the cross section of the annular groove coincides with the position of the convex head of the metal bump.

3. The low-speed, high-power permanent magnet synchronous all-in-one machine according to claim 1, characterized in that: A groove is formed on the side of the pressure rod (25) away from the hinge seat (104), and a back-stopping tooth groove is arranged in the groove. A clamping tooth rod is reserved at one end of the metal slide rail (27) away from the conductive ring (20), and the clamping tooth rod and the back-stopping tooth groove are meshed with each other.

4. The low-speed high-power permanent magnet synchronous all-in-one machine according to claim 1, characterized in that: A spring recess (105) is formed on one side of the outer fixing block (103) close to the pressure rod (25), and electromagnets are arranged at the bottom of the spring recess (105). When the motor is officially powered on and rotated, only three electromagnets need to be powered on.

5. The low-speed high-power permanent magnet synchronous all-in-one machine according to claim 1, characterized in that: The outer wall of the motor housing (1) is fixed with a plurality of mutually parallel heat dissipation ribs (13); an outer hexagonal sleeve (8) is sleeved and fixed to one end of the motor housing (1) close to the outer fixing block (103), and an extension block is fixed to one end of the outer hexagonal sleeve (8) close to the rear cover (2), and motor brackets (7) are fixed on both sides of the extension block, and the outer hexagonal sleeve (8) is welded and fixed to the outer wall of the motor housing (1).

6. The low-speed high-power permanent magnet synchronous all-in-one machine according to claim 5, characterized in that: The outer hexagonal sleeve (8) is provided with three maintenance notches (801) on a side close to the front end cover (12) and matched with the size and position of the corresponding external fixing block (103), and the maintenance notch (801) is provided with an anti-dropout slot (802) on a side away from the motor housing (1); the outer cover (9) is sleeved and fixed on the open end of the circumferential outer wall of the motor housing (1) close to the maintenance notch (801), and three bending covers (902) are folded at the edge of the outer cover (9) and are distributed symmetrically in the center, and the bending covers (902) are slidably inserted in the three anti-dropout slots (802); and the bending cover (902) is provided with a strip hole (901).

7. The low-speed high-power permanent magnet synchronous all-in-one machine according to claim 1, characterized in that: Three screw connection blocks are arranged on one side of the circumferential inner wall of the motor housing (1) close to the front end cover (12), and a positioning block (121) engaged with the screw connection block is reserved on one side of the front end cover (12) close to the motor housing (1), and a screw connection hole matched with the screw connection block is opened on the front end cover (12) close to the positioning block (121).

8. The low-speed high-power permanent magnet synchronous all-in-one machine according to claim 1, characterized in that: An elliptical wheel (16) and a cooling fan (15) are respectively fixed to one end of the motor shaft close to the bearing positioning frame (17), and the inner wall of the motor housing (1) is arranged to be an angular straight structure.

9. The low-speed high-power permanent magnet synchronous all-in-one machine according to claim 8, characterized in that: The rear cover (2) is provided with a plurality of circular holes (21), and the rear cover (2) is also provided with a mesh hole 1; the surface of the rear cover (2) is provided with mutually parallel and vertical anti-slip grooves (3) near the left and right sides, and the anti-slip grooves (3) are slidably connected with anti-slip sliders (24); the two anti-slip sliders (24) are fixed with the same shaking mesh cover (14) on the side away from the groove bottom, and the surface of the shaking mesh cover (14) is provided with a mesh hole 2 matched with the mesh hole 1.

10. The low-speed high-power permanent magnet synchronous all-in-one machine according to claim 9, characterized in that: The outer wall of the motor housing (1) is provided with a shoulder plane (101) matched with the position of the elliptical wheel (16) at one end close to the shaking mesh cover (14), and a sliding bearing (22) with a center line pointing directly to the elliptical wheel (16) is embedded on the shoulder plane (101), a U-shaped support rod (4) is slidably connected in the sliding bearing (22), and a clamping wheel (23) is provided at the end of the U-shaped support rod (4) close to the elliptical wheel (16), and the end of the U-shaped support rod (4) away from the elliptical wheel (16) is fixed to the shaking mesh cover (14); a spring cover (6) is fixed at the corner of the U-shaped support rod (4) close to the shoulder plane (101), and a return spring (5) is provided between the spring cover (6) and the shoulder plane (101).

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