Spliced outer rotor structure for motor

Abstract

The utility model relates to the technical field of motors, and discloses a spliced outer rotor structure for a motor, which comprises a rotating shell, an end cover is arranged at the right end of the rotating shell, a dovetail groove is formed in the right end of the rotating shell, a positioning groove is formed in the right end of the rotating shell, a plurality of rotor splicing blocks are arranged in the rotating shell, and the rotor splicing blocks are connected with the dovetail groove and the positioning groove. The surfaces of the multiple rotor splicing blocks are fixedly connected with outer dovetail blocks, and the inner walls of the multiple rotor splicing blocks are fixedly connected with inner dovetail blocks. According to the utility model, the rotor splicing blocks can be detached by detaching the fixing screws, canceling the fixation between the rotating shell and the end cover and pulling the rotor splicing blocks to enable the outer dovetail blocks to slide outwards along the dovetail grooves, so that the subsequent replacement of the rotor splicing blocks is facilitated, the whole rotor does not need to be replaced, the maintenance cost is reduced, and since the permanent magnets are in sliding connection with the inner dovetail blocks, the service life of the rotor is prolonged. The permanent magnet with weakened magnetism can be conveniently replaced, and the maintenance convenience is improved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a spliced ​​external rotor structure for motors. Background Technology

[0002] An external rotor motor is a structural form in electric motors where the rotor is located on the outside of the motor, while the stator is located inside. This design allows the external rotor to rotate while the internal stator remains stationary. External rotor motors typically have smaller permanent magnet volume and axial dimensions, contributing to improved system stability. While external rotor motors generally operate at lower speeds than internal rotor motors, they excel in applications requiring efficient heat dissipation and cooling. Advantages of external rotor motors include the ability to be manufactured as a fully enclosed structure, rapid start-up, low power consumption, high speed, high efficiency, and long service life. However, external rotor motors also have some disadvantages, such as poor sealing, high rotor inertia, high noise levels, and stringent requirements for dynamic balancing. External rotor motors are commonly used in applications requiring efficient heat dissipation and cooling, such as impellers.

[0003] Traditional external rotor structures typically employ an integral design, fixing the rotor and permanent magnet within a single housing. If the rotor or permanent magnet is damaged or its performance degrades, the entire rotor structure must be disassembled and replaced, resulting in material waste and increased maintenance costs. Therefore, we propose a modular external rotor structure for motors. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a spliced ​​external rotor structure for motors.

[0005] This utility model is achieved using the following technical solution: a spliced ​​external rotor structure for an electric motor, comprising a rotating housing, an end cap at the right end of the rotating housing, a dovetail groove at the right end of the rotating housing, a positioning groove at the right end of the rotating housing, multiple rotor splicing blocks inside the rotating housing, outer dovetail blocks fixedly connected to the surface of each of the multiple rotor splicing blocks, inner dovetail blocks fixedly connected to the inner wall of each of the multiple rotor splicing blocks, a permanent magnet slidably connected to the surface of the inner dovetail block, a limit ring fixedly connected to the inner wall of the rotating housing, a fixing screw threadedly connected to the inner wall of the end cap, and a positioning block fixedly connected to the left end of the end cap.

[0006] By removing the fixing screws, the fixing between the rotating housing and the end cover is eliminated. Then, the rotor splicing block is pulled to make the outer dovetail block slide outward along the dovetail groove, which can disassemble the rotor splicing block. This facilitates subsequent replacement without replacing the entire rotor, reducing maintenance costs. Since the permanent magnet is slidably connected to the inner dovetail block, the permanent magnet with weakened magnetism can be easily replaced, improving the convenience of maintenance.

[0007] As a further improvement to the above solution, the left end of the end cap contacts the right end of the rotor splicing block, and the surface of the outer dovetail block is slidably connected to the inner wall of the dovetail groove.

[0008] The above technical solution uses the dovetail groove to limit the outer dovetail block, preventing the rotor splicing block from detaching during high-speed rotation and ensuring structural stability.

[0009] As a further improvement to the above scheme, the number of dovetail grooves corresponds to the number of outer dovetail blocks, and the left end of the permanent magnet contacts the right end of the limiting ring.

[0010] The above technical solution uses a limiting ring to block and limit the left side of the permanent magnet, preventing the permanent magnet from moving during use.

[0011] As a further improvement to the above solution, the left end of the fixing screw penetrates the end cover and is threadedly connected to the inner wall of the rotating housing.

[0012] The above technical solution uses fixing screws to install and fix the end cover to the rotating housing, which facilitates subsequent disassembly.

[0013] As a further improvement to the above solution, the surface of the positioning block contacts the inner wall of the positioning groove, and the size of the positioning block is adapted to the size of the positioning groove.

[0014] The above technical solution uses a positioning groove to limit the positioning block, which aligns the threaded holes between the end cap and the rotating housing, reducing docking time and improving installation efficiency.

[0015] As a further improvement to the above solution, four positioning slots are provided, and the four positioning slots are arranged in a circle around the rotating housing.

[0016] With the above technical solution, the number of positioning grooves corresponds to the number of threaded holes, and the threaded holes are also arranged in a circumferential pattern around the rotating housing, so that no matter how the end cap rotates, when the positioning block enters the inner wall of the positioning groove, it can accurately align with the threaded holes.

[0017] As a further improvement to the above scheme, the number of positioning blocks corresponds to the number of positioning slots.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This invention features a rotating housing, end cover, rotor assembly block, and inner dovetail block. Specifically, when a damaged rotor assembly block needs replacement, the fixing screws are removed, eliminating the connection between the rotating housing and the end cover. Then, the rotor assembly block is pulled, causing the outer dovetail block to slide outward along the dovetail groove, allowing for easy disassembly and replacement without needing to replace the entire rotor, thus reducing maintenance costs. Furthermore, the sliding connection between the permanent magnet and the inner dovetail block facilitates the replacement of weakened permanent magnets, further improving maintenance convenience.

[0020] This utility model, through the setting of a rotating housing, end cap, limiting ring, and fixing screws, specifically involves the following installation process: First, the permanent magnet is slidably connected to the inner dovetail block and inserted into the interior of the rotor assembly block. Then, the outer dovetail block is slidably connected to the dovetail groove to initially position the rotor assembly block. The limiting ring limits the permanent magnet to prevent it from moving. Multiple rotor assembly blocks are then installed into the dovetail groove in sequence. Next, the positioning block is placed into the positioning groove to position it, aligning the threaded holes of the rotating housing and the end cap. Finally, the fixing screws are used to install and fix the rotor assembly block. The end cap provides a squeezing and fixing effect on the rotor assembly block. The operation is simple and quick, improving the efficiency of assembly and disassembly. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic cross-sectional view of the present invention.

[0023] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0024] Figure 4 This is a side view of the structure of this utility model;

[0025] Figure 5 This is a schematic diagram of the rotating housing structure of this utility model;

[0026] Figure 6 This is a schematic diagram of the rotor splicing block structure of this utility model;

[0027] Figure 7 This is a schematic diagram of the end cap structure of this utility model.

[0028] Explanation of key symbols:

[0029] 1. Rotating housing; 2. End cover; 3. Dovetail groove; 4. Positioning groove; 5. Rotor splicing block; 6. Outer dovetail block; 7. Inner dovetail block; 8. Permanent magnet; 9. Limiting ring; 10. Fixing screw; 11. Positioning block. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] Example:

[0032] Please combine Figure 1-7 This embodiment of a spliced ​​external rotor structure for a motor includes a rotating housing 1, an end cap 2 at the right end of the rotating housing 1, a dovetail groove 3 at the right end of the rotating housing 1, a positioning groove 4 at the right end of the rotating housing 1, and multiple rotor splicing blocks 5 inside the rotating housing 1. Outer dovetail blocks 6 are fixedly connected to the surfaces of each of the multiple rotor splicing blocks 5, and inner dovetail blocks 7 are fixedly connected to the inner walls of each of the multiple rotor splicing blocks 5. A permanent magnet 8 is slidably connected to the surface of the inner dovetail block 7, and a limit ring is fixedly connected to the inner wall of the rotating housing 1. 9. The inner wall of the end cover 2 is threaded with a fixing screw 10, and the left end of the end cover 2 is fixedly connected with a positioning block 11. By removing the fixing screw 10, the fixing between the rotating housing 1 and the end cover 2 is removed. Then, the rotor splicing block 5 is pulled so that the outer dovetail block 6 slides outward along the dovetail groove 3. The rotor splicing block 5 can be disassembled, which is convenient for subsequent replacement. There is no need to replace the entire rotor, which reduces maintenance costs. Since the permanent magnet 8 is slidably connected to the inner dovetail block 7, the permanent magnet 8 with weakened magnetism can be easily replaced, which improves the convenience of maintenance.

[0033] The left end of the end cap 2 contacts the right end of the rotor splicing block 5, and the surface of the outer dovetail block 6 is slidably connected to the inner wall of the dovetail groove 3. During installation, the permanent magnet 8 is first slidably connected to the inner dovetail block 7 and inserted into the interior of the rotor splicing block 5. Then, the outer dovetail block 6 is slidably connected to the dovetail groove 3 to initially position the rotor splicing block 5. Multiple rotor splicing blocks 5 are then installed into the interior of the dovetail groove 3 in sequence. The operation is simple and quick, improving the installation efficiency.

[0034] The number of dovetail grooves 3 corresponds to the number of outer dovetail blocks 6. The left end of the permanent magnet 8 contacts the right end of the limiting ring 9. The limiting ring 9 limits the permanent magnet 8 to prevent it from moving.

[0035] The left end of the fixing screw 10 passes through the end cover 2 and is threadedly connected to the inner wall of the rotating housing 1.

[0036] The surface of the positioning block 11 contacts the inner wall of the positioning groove 4, and the size of the positioning block 11 is adapted to the size of the positioning groove 4.

[0037] There are four positioning slots 4, which are arranged in a circle around the rotating housing 1.

[0038] The number of positioning blocks 11 corresponds to the number of positioning slots 4. The positioning blocks 11 are placed inside the positioning slots 4 and positioned so that the rotating housing 1 is aligned with the threaded hole of the end cover 2. Then, they are installed and fixed by fixing screws 10. The end cover 2 has a squeezing and fixing effect on the rotor splicing block 5. The operation is simple and quick, and the disassembly and assembly efficiency is improved.

[0039] The implementation principle of the spliced ​​external rotor structure for motors in this application embodiment is as follows: When it is necessary to replace the damaged rotor splice block 5, the fixing screws 10 are removed to cancel the fixing between the rotating housing 1 and the end cover 2. Then, the rotor splice block 5 is pulled to make the outer dovetail block 6 slide outward along the dovetail groove 3, so that the rotor splice block 5 can be disassembled, which facilitates subsequent replacement without replacing the entire rotor, thus reducing maintenance costs. Since the permanent magnet 8 is slidably connected to the inner dovetail block 7, the permanent magnet 8 with weakened magnetism can be easily replaced, improving the convenience of maintenance. During installation, the permanent magnet 8 is first... The inner dovetail block 7 is slidably connected to the inside of the rotor splicing block 5. Then, the outer dovetail block 6 is slidably connected to the dovetail groove 3 to initially position the rotor splicing block 5. The permanent magnet 8 is limited by the limiting ring 9 to prevent the permanent magnet 8 from moving. Multiple rotor splicing blocks 5 are installed into the inside of the dovetail groove 3 in sequence. Then, the positioning block 11 is placed into the inside of the positioning groove 4 to position it so that the rotating housing 1 is aligned with the threaded hole of the end cover 2. Then, it is fixed by fixing screws 10. The end cover 2 has a squeezing and fixing effect on the rotor splicing block 5. The operation is simple and quick, and the disassembly and assembly efficiency is improved.

[0040] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A spliced outer rotor structure for an electric motor, characterized by comprising: The rotating housing (1) includes an end cap (2) at the right end of the rotating housing (1), a dovetail groove (3) at the right end of the rotating housing (1), a positioning groove (4) at the right end of the rotating housing (1), a plurality of rotor splicing blocks (5) inside the rotating housing (1), an outer dovetail block (6) fixedly connected to the surface of each of the plurality of rotor splicing blocks (5), an inner dovetail block (7) fixedly connected to the inner wall of each of the plurality of rotor splicing blocks (5), a permanent magnet (8) slidably connected to the surface of the inner dovetail block (7), a limit ring (9) fixedly connected to the inner wall of the rotating housing (1), a fixing screw (10) threadedly connected to the inner wall of the end cap (2), and a positioning block (11) fixedly connected to the left end of the end cap (2).

2. The spliced ​​external rotor structure for an electric motor as described in claim 1, characterized in that: The left end of the end cap (2) contacts the right end of the rotor splicing block (5), and the surface of the outer dovetail block (6) is slidably connected to the inner wall of the dovetail groove (3).

3. The spliced ​​external rotor structure for an electric motor as described in claim 1, characterized in that: The number of dovetail grooves (3) corresponds to the number of outer dovetail blocks (6), and the left end of the permanent magnet (8) contacts the right end of the limiting ring (9).

4. The spliced ​​external rotor structure for an electric motor as described in claim 1, characterized in that: The left end of the fixing screw (10) passes through the end cap (2) and is threaded to the inner wall of the rotating housing (1).

5. The spliced ​​external rotor structure for an electric motor as described in claim 1, characterized in that: The surface of the positioning block (11) is in contact with the inner wall of the positioning groove (4), and the size of the positioning block (11) is adapted to the size of the positioning groove (4).

6. The spliced ​​external rotor structure for an electric motor as described in claim 5, characterized in that: The number of the positioning grooves (4) is four, and the four positioning grooves (4) are arranged in a circle around the rotating housing (1).

7. The spliced ​​external rotor structure for an electric motor as described in claim 6, characterized in that: The number of the positioning blocks (11) corresponds to the number of positioning slots (4).

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