An outer rotor industrial ceiling fan permanent magnet synchronous motor

Abstract

This invention relates to an external rotor industrial ceiling fan permanent magnet synchronous motor, comprising a detachably connected housing 1 and housing 2. A mounting shaft is rotatably connected to housing 1, passing through housing 2 and rotatably connected thereto. A stator is mounted on the mounting shaft, located within a cavity formed by housing 1 and housing 2. Multiple rotors are mounted on the inner wall of housing 2. This invention features ultra-high power conversion efficiency and a simple and reliable installation structure.

Description

Technical Field

[0001] This utility model relates to the field of motors, and in particular to a permanent magnet synchronous motor for an external rotor industrial ceiling fan. Background Technology

[0002] To lower the temperature inside the factory and improve the working environment for employees, open-plan factories typically install large industrial ceiling fans on the roof of the factory building.

[0003] Currently, industrial ceiling fans typically use an induction motor to drive a speed reducer, which in turn drives the fan blades. In this design, the motor is a high-speed asynchronous motor, requiring a speed reducer to meet the fan's low-speed, high-torque requirements. This type of product suffers from low power conversion efficiency, high energy consumption, and complex installation. Utility Model Content

[0004] This application provides an external rotor industrial ceiling fan permanent magnet synchronous motor, which has ultra-high power conversion efficiency and a simple and reliable installation structure.

[0005] The technical solution for an external rotor industrial ceiling fan permanent magnet synchronous motor provided in this application is as follows: An external rotor industrial ceiling fan permanent magnet synchronous motor includes a detachably connected housing 1 and housing 2. A mounting shaft is rotatably connected to housing 1, and the mounting shaft passes through housing 2 and is rotatably connected to housing 2. A stator is provided on the mounting shaft. The stator is located in the cavity formed by housing 1 and housing 2. Multiple rotors are provided on the inner wall of housing 2.

[0006] By adopting the above technical solution, multiple rotors are mounted on housing two, allowing housing one and housing two to rotate relative to the stator, thereby causing housing two to drive the fan blades to rotate. Simultaneously, the power transmission in this application structure adopts a direct-drive form, eliminating the need for a reducer, resulting in more efficient power delivery, a simpler and more reliable installation structure, and a longer service life.

[0007] Preferably, the outer wall of the first housing is provided with multiple first connecting posts, each of which has a countersunk hole; the outer wall of the second housing is provided with multiple second connecting posts, each of which has a threaded hole, and the multiple countersunk holes are respectively aligned with the multiple threaded holes; each of the multiple countersunk holes is provided with a bolt that mates with the threaded hole.

[0008] By adopting the above technical solution, a reliable connection between shell one and shell two is achieved.

[0009] Preferably, the inner wall of the second housing is provided with multiple first reinforcing ribs, and each of the multiple first reinforcing ribs is provided with a heat dissipation hole, which penetrates the second housing.

[0010] By adopting the above technical solution, the first reinforcing rib is set to improve the strength of the shell, and the heat dissipation holes are opened to improve the heat dissipation efficiency of the motor. At the same time, opening the heat dissipation holes on the first reinforcing rib can reduce the impact of opening the heat dissipation holes on the strength of the shell.

[0011] Preferably, the outer side wall of the second housing is provided with multiple second reinforcing ribs, and the side of the multiple second reinforcing ribs facing away from the second housing protrudes to form heat sinks.

[0012] By adopting the above technical solution, the strength of the outer side wall of the second housing is improved by setting a second reinforcing rib, and the heat sink is set to improve the heat dissipation performance of the second housing, thus preventing the rotor from overheating.

[0013] Preferably, an annular slot is provided on the outer side wall of the first housing, the second housing is inserted into the slot, and a guide slope is provided on the side wall of the slot near the second housing.

[0014] By adopting the above technical solution, it is convenient to assemble shell one and shell two.

[0015] Preferably, force-applying blocks are provided on both sides of the first connecting column, and multiple force-applying blocks and multiple second reinforcing ribs are staggered along the circumferential direction of the installation axis.

[0016] By adopting the above technical solution, when assembling and disassembling shell one and shell two, the worker can separate shell one and shell two by holding the force-applying block with one hand and the second reinforcing rib with the other, and then applying force in opposite directions with both hands. Therefore, the force-applying block is set up to facilitate the disassembly and separation of shell one and shell two.

[0017] Preferably, an annular groove is formed on the side wall of the slot, and a sealing ring is fitted inside the annular groove, with the housing pressing against the sealing ring.

[0018] By adopting the above technical solution, the sealing performance at the connection between housing one and housing two is improved.

[0019] Preferably, a first bearing is provided on the first housing, a second bearing is provided on the second housing, the mounting shaft is connected to the inner ring of the first bearing and the inner ring of the second bearing, and the stator is located between the first bearing and the second bearing.

[0020] By adopting the above technical solution, it is convenient to install the shaft and connect it to housing one and housing two.

[0021] The main technical effects of this utility model are reflected in the following aspects: 1. This utility model sets the rotor on the second housing, so that the rotation of the second housing drives the fan blade to rotate, completing the direct transmission of power and having a super-efficient power transmission effect. 2. This utility model is equipped with a first reinforcing rib and a force-applying block, which facilitates workers to disassemble and separate shell one and shell two; 3. This utility model facilitates the installation of housing one, housing two, and mounting shaft by respectively setting a first bearing and a second bearing on housing one and housing two. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the motor structure.

[0023] Figure 2 yes Figure 1 A cross-sectional view of the motor along line AA.

[0024] Figure 3 yes Figure 2 A magnified view of a section at point B in the middle.

[0025] Figure 4 This is a structural diagram of the motor from another angle.

[0026] Figure 5 This is a structural schematic diagram of shell one.

[0027] Figure 6 This is a schematic diagram of the structure of shell two.

[0028] Reference numerals in the attached drawings: 1. Housing 1; 11. First connecting post; 12. Countersunk hole; 13. Bolt; 14. Applying force block; 15. Slot; 16. Guide slope; 17. Annular groove; 18. Sealing ring; 2. Housing 2; 21. Second connecting post; 22. Threaded hole; 23. First reinforcing rib; 24. Heat dissipation hole; 25. Second reinforcing rib; 26. Heat sink; 3. Mounting shaft; 4. Stator; 5. Rotor; 6. First bearing; 7. Second bearing. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings, so that the technical solution of the present application can be more easily understood and mastered.

[0030] Reference Figures 1-3 This embodiment of an external rotor industrial ceiling fan permanent magnet synchronous motor includes a detachably connected housing 1 and housing 2. An annular slot 15 is formed on the outer side wall of housing 1, and housing 2 is inserted into the slot 15. A guide slope 16 is formed on the side wall of slot 15 near housing 2 to facilitate insertion of housing 2 into slot 15. An annular groove 17 is also formed on the side wall of slot 15, and a sealing ring 18 is fitted inside the annular groove 17, with housing 2 pressing against the sealing ring 18.

[0031] Reference Figure 1 , Figures 4-6Multiple first connecting posts 11 are integrally formed on the outer wall of shell 1, and each of the multiple first connecting posts 11 has a countersunk hole 12. Multiple second connecting posts 21 are integrally formed on the outer wall of shell 2, and each of the multiple second connecting posts 21 has a threaded hole 22. The multiple countersunk holes 12 are respectively aligned with the multiple threaded holes 22. Each of the multiple countersunk holes 12 is provided with a bolt 13 that mates with the threaded hole 22.

[0032] Reference Figure 1 , Figure 2 , Figure 5 , Figure 6 A first bearing 6 is installed at the center of housing 1, and a second bearing 7 is installed at the center of housing 2. A mounting shaft 3 is installed on the inner ring of the first bearing 6, and the inner ring of the second bearing 7 is fitted onto the mounting shaft 3. The mounting shaft 3 extends out of housing 2. A stator 4 is provided on the mounting shaft 3. The stator 4 is located in the cavity formed by housing 1 and housing 2, and is located between the first bearing 6 and the second bearing 7.

[0033] Reference Figure 1 and Figure 6 Multiple rotors 5 are mounted on the inner wall of the housing 2, all of which face the stator 4. Multiple first reinforcing ribs 23 are mounted on the top wall of the inner cavity of the housing 2, each with a heat dissipation hole 24 that penetrates the housing 2. Multiple second reinforcing ribs 25 are mounted on the outer wall of the housing 2, with the side of each second reinforcing rib facing away from the housing 2 protruding to form a heat sink 26.

[0034] Reference Figure 1 , Figure 4 , Figure 5 Both sides of the first connecting column 11 are integrally formed with force-applying blocks 14. Multiple force-applying blocks 14 and multiple second reinforcing ribs 25 are staggered along the circumferential direction of the mounting shaft 3. When disassembling and assembling the housing 1 and the housing 2, the worker first unscrews the bolts 13, then holds the force-applying blocks 14 with one hand and the second reinforcing ribs 25 with the other, and applies force in opposite directions with both hands to separate the housing 1 and the housing 2. Therefore, the force-applying blocks 14 are provided to facilitate the disassembly and separation of the housing 1 and the housing 2.

[0035] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.

Claims

1. A permanent magnet synchronous motor for an external rotor industrial ceiling fan, characterized in that: It includes a detachably connected housing 1 (1) and housing 2 (2). A mounting shaft (3) is rotatably connected to the housing 1 (1). The mounting shaft (3) passes through the housing 2 (2) and is rotatably connected to the housing 2 (2). A stator (4) is provided on the mounting shaft (3). The stator (4) is located in the cavity formed by the housing 1 (1) and housing 2 (2). Multiple rotors (5) are provided on the inner wall of the housing 2 (2). The outer wall of the first housing (1) is provided with multiple first connecting posts (11), and each of the multiple first connecting posts (11) is provided with countersunk holes (12); the outer wall of the second housing (2) is provided with multiple second connecting posts (21), each of the multiple second connecting posts (21) is provided with threaded holes (22), and the multiple countersunk holes (12) are respectively aligned with the multiple threaded holes (22); each of the multiple countersunk holes (12) is provided with bolts (13) that cooperate with the threaded holes (22); Multiple second reinforcing ribs (25) are provided on the outer side wall of the second housing (2), and the side of the multiple second reinforcing ribs (25) facing away from the second housing (2) protrudes to form heat sinks (26); An annular slot (15) is provided on the outer side wall of the first housing (1), and the second housing (2) is inserted into the slot (15). A guide slope (16) is provided on the side wall of the slot (15) near the second housing (2).

2. The permanent magnet synchronous motor for an external rotor industrial ceiling fan according to claim 1, characterized in that: The inner wall of the second shell (2) is provided with multiple first reinforcing ribs (23), and each of the multiple first reinforcing ribs (23) is provided with heat dissipation holes (24), which penetrate the second shell (2).

3. The permanent magnet synchronous motor for an external rotor industrial ceiling fan according to claim 2, characterized in that: Both sides of the first connecting column (11) are provided with force-applying blocks (14), and multiple force-applying blocks (14) and multiple second reinforcing ribs (25) are staggered along the circumferential direction of the mounting axis (3).

4. The permanent magnet synchronous motor for an external rotor industrial ceiling fan according to claim 3, characterized in that: A ring groove (17) is provided on the side wall of the slot (15), and a sealing ring (18) is fitted inside the ring groove (17). The housing (2) presses against the sealing ring (18).

5. The permanent magnet synchronous motor for an external rotor industrial ceiling fan according to claim 1, characterized in that: The first housing (1) is provided with a first bearing (6), the second housing (2) is provided with a second bearing (7), the mounting shaft (3) is connected to the inner ring of the first bearing (6) and the inner ring of the second bearing (7), and the stator (4) is located between the first bearing (6) and the second bearing (7).

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