Stator and rotor iron core structure of motor

Abstract

The utility model relates to the technical field of stators and rotors, in particular to a motor stator and rotor iron core structure which comprises a stator body, a rotor body arranged on the inner side of the stator body, a main shaft slidably connected to the inner side of the rotor body, a fixing ring fixedly connected to the outer side below the main shaft, and a triangular block fixedly connected to the middle of the upper portion in the main shaft. The outer end faces of the triangular blocks are fixedly connected with compression springs, and the ends, away from the triangular blocks, of the compression springs are fixedly connected with clamping blocks. Through the design cooperation of the compression spring and the clamping block, the device can telescopically move in the main shaft, automatic centering of the rotor in the insertion process is facilitated, the coaxiality error in the assembling process is reduced, meanwhile, if the rotor needs to be replaced, the clamping block can enter the main shaft in an extrusion mode and can be relatively easily adjusted or removed, and the replacement efficiency of the rotor is improved. Therefore, the maintenance and replacement processes are simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of stator and rotor, in particular to a stator and rotor core structure of an electric machine. Background Technique

[0002] The stator and rotor cores of an electric machine are the core parts used to generate and conduct magnetic fields in the electric machine, and they are respectively located in the stator and rotor of the electric machine;

[0003] It is found that the publication (announcement) number: CN220896376U discloses a stator and rotor core structure of a generator. In this technology, "a stator and rotor core structure of a generator is disclosed, including a core body and a connecting sleeve; wherein, a reinforcing core is arranged in the inner cavity of the core body, and a wear-resistant coating is arranged on the surface of the core body; the connecting sleeve is arranged in the middle of the surface of the core body, and connecting rods are uniformly arranged on the surface of the connecting sleeve, one end of each connecting rod is provided with a spring rod, one end of the spring rod is provided with a guiding block, and limiting card slots are also uniformly arranged on the surface of the connecting sleeve; its structure is reasonable. During use, it has high structural strength, can prevent breakage, has good anti-corrosion and wear-resistant performance, long service life, and strong practicability".

[0004] When the existing rotor and the main shaft are assembled, the main shaft needs to accurately determine the fixed position for cooling, otherwise it will cause the situation that the rotor and the main shaft have errors due to misalignment. Moreover, during subsequent maintenance, it is not convenient for maintenance personnel to take out the main shaft from the rotor. Taking out the main shaft requires many steps, reducing the maintenance efficiency of the rotor and the main shaft by the maintenance personnel.

[0005] To solve the above problems, a stator and rotor core structure of an electric machine is proposed in this application. Content of the Utility Model

[0006] To solve the problems raised in the above background technique. The utility model provides a stator and rotor core structure of an electric machine, which can quickly install and disassemble the main shaft, and has the characteristic of evenly spreading the adhesive between the rotor body and the main shaft through high-speed rotation.

[0007] To achieve the above object, the utility model adopts the following technical scheme: A stator and rotor core structure of an electric machine, including a stator body, a rotor body is arranged inside the stator body, a main shaft is slidably connected inside the rotor body, a fixed ring is fixedly connected to the outer side below the main shaft, a triangular block is fixedly connected to the middle above the inside of the main shaft, a compression spring is fixedly connected to the outer end face of the triangular block, and a clamping block is fixedly connected to the end of the compression spring away from the triangular block.

[0008] Preferably, as a stator-rotor core structure of the utility model, the outer side of the compression spring contacts the upper part inside the main shaft, the outer side of the upper part inside the main shaft contacts the surface of the clamping block, the bottom of the clamping block contacts the top of the rotor body, and the bottom of the rotor body contacts the top of the fixing ring. It can telescopically move inside the main shaft, which helps the rotor to automatically align during insertion and reduces the coaxiality error during assembly.

[0009] Preferably, as a stator-rotor core structure of the utility model, a dug groove is provided in the upper part inside the main shaft. The cross-sectional shape of the dug groove in the upper part inside the main shaft is circular, and the depth of the dug groove matches the height of the triangular block. This allows the compression spring to drive the clamping block to expand and contract inside the upper part of the main shaft, reducing the floor area occupied by the compression spring.

[0010] Preferably, as a stator-rotor core structure of the utility model, a through groove is provided on the surface of the main shaft around the edge of the dug groove in the upper part inside the main shaft. The length of the through groove matches the length of the outer top end of the clamping block. The position and number of the through grooves on the surface of the main shaft match the position and number of the clamping blocks, which facilitates the clamping block to retract inside the main shaft and plays a certain role in allowing the main shaft to penetrate into the rotor body and rebound to be clamped.

[0011] Preferably, as a stator-rotor core structure of the utility model, the cross-sectional shape of the triangular block is an equilateral triangle, and the compression spring and the clamping block are distributed at the three surface positions of the triangular block. The overall shape of the clamping block is the same as that of an isosceles trapezoid divided into three equal parts. The clamping block can enter the main shaft by extrusion, and can be relatively easily adjusted or removed, thus simplifying the maintenance and replacement process.

[0012] Preferably, as a stator-rotor core structure of the utility model, a glue guiding groove is provided on the surface of the main shaft, a glue injection hole is provided on the outer side inside the main shaft, a placement hole is provided in the middle inside the main shaft, a polyvinyl alcohol ball is arranged at the placement hole in the middle inside the main shaft, and a polyvinyl alcohol tube is arranged at the glue injection hole on the outer side inside the main shaft. The glue for bonding the rotor body and the main shaft can be injected into the polyvinyl alcohol ball, the outer side of the rotor body is heated to make the polyvinyl alcohol ball rupture, and the rotor body is rotated at a high speed to discharge the glue from the injection hole and the glue guiding groove outward, and the glue is evenly spread between the rotor body and the main shaft.

[0013] Preferably, as a stator and rotor core structure of the utility model, the inside of the polyvinyl alcohol ball is in a hollow state and communicates with the polyvinyl alcohol tube, and the shape, size and position of the polyvinyl alcohol ball and the polyvinyl alcohol tube are all matched with the shape, size and position of the glue injection hole and the placement hole. Glue is injected into the polyvinyl alcohol ball. The glue injection hole is arranged at the center position of the glue guiding groove, and the length of the glue injection hole is half of the length of one circle around the surface of the main shaft. The function of the glue guiding groove is that the glue flows out of the glue injection hole due to centrifugal force and spreads evenly along the glue guiding groove between the rotor body and the main shaft.

[0014] The utility model has the following beneficial effects:

[0015] For the stator and rotor core structure of the motor designed by the utility model, through the design cooperation of the compression spring and the clamping block, the device can telescopically move in the main shaft, which helps the rotor to automatically center during the insertion process, reducing the coaxiality error during assembly. At the same time, if the rotor needs to be replaced, the clamping block can enter the inside of the main shaft by extrusion and can be relatively easily adjusted or removed, thus simplifying the maintenance and replacement process.

[0016] For the stator and rotor core structure of the motor designed by the utility model, through the design cooperation of the placement hole and the polyvinyl alcohol ball, the device can inject the glue that adheres between the rotor body and the main shaft into the polyvinyl alcohol ball, place the polyvinyl alcohol ball in the placement hole inside the main shaft, heat the outside of the rotor body after installation to make the polyvinyl alcohol ball break, and rotate the rotor body at high speed to let the glue drain out from the injection hole and the glue guiding groove, so that the glue evenly covers between the rotor body and the main shaft, improving the installation efficiency to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are used to provide a further understanding of the utility model and constitute a part of the specification. They are used together with the embodiments of the utility model to explain the utility model and do not constitute a limitation to the utility model. In the drawings:

[0018] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 is a schematic diagram of the overall structure of the main shaft of the utility model;

[0020] Figure 3 is a three-dimensional structure schematic diagram of the longitudinal section of the rotor body and the main shaft of the utility model;

[0021] Figure 4 is a schematic diagram of the overall structure of the polyvinyl alcohol ball of the utility model.

[0022] LEGEND DESCRIPTION:

[0023] 1. Stator body; 2. Rotor body; 3. Main shaft; 4. Clamping block; 5. Fixed ring; 6. Glue injection hole; 7. Glue guiding groove; 8. Triangular block; 9. Compression spring; 10. Placing hole; 11. Polyvinyl alcohol tube; 12. Polyvinyl alcohol ball. Detailed implementation manner

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0025] Embodiment 1

[0026] As Figures 1 to 4 shown;

[0027] A motor stator and rotor core structure includes a stator body 1.

[0028] In this implementation: It is found that the publication (announcement) number: CN220896376U discloses a generator stator and rotor core structure. To solve the existing problems in this prior art, as disclosed in the above background art, "When the existing rotor and main shaft are assembled, the main shaft needs to accurately determine the fixed position for cooling, otherwise it will cause the situation that the rotor and the main shaft are misaligned and have errors, and during subsequent maintenance, it is not convenient for maintenance personnel to take out the main shaft from the rotor. Taking out the main shaft requires many steps, reducing the maintenance efficiency of the rotor and the main shaft by maintenance personnel." In combination, this problem is obviously an existing and difficult-to-solve problem. In view of this, to solve this technical problem, a clamping block 4 and polyvinyl alcohol balls 12 are added to this application document;

[0029] Furthermore:

[0030] As Figures 1 to 4 shown:

[0031] Combined with the above content: A motor stator and rotor core structure includes a stator body 1. The rotor body 2 is arranged inside the stator body 1. The main shaft 3 passes through and slides inside the rotor body 2. A fixed ring 5 is welded to the outer side below the main shaft 3. A triangular block 8 is welded to the middle above the inside of the main shaft 3. A compression spring 9 is welded to the outer end face of the triangular block 8. One end of the compression spring 9 away from the triangular block 8 is welded to the clamping block 4. The outer side of the compression spring 9 contacts the upper part inside the main shaft 3. The outer side above the inside of the main shaft 3 contacts the surface of the clamping block 4. The bottom of the clamping block 4 contacts the top of the rotor body 2. The bottom of the rotor body 2 contacts the top of the fixed ring 5.

[0032] In this embodiment: It can telescopically move within the main shaft 3, which helps the rotor to automatically align during the insertion process and reduces the coaxiality error during assembly.

[0033] In an alternative embodiment: A grooved cavity is provided above the interior of the main shaft 3. The cross-sectional shape of the grooved cavity above the interior of the main shaft 3 is circular, and the depth of the grooved cavity matches the height of the triangular block 8.

[0034] In this embodiment: The compression spring 9 can drive the clamping block 4 to expand and contract above the interior of the main shaft 3, reducing the floor area occupied by the compression spring 9.

[0035] In an alternative embodiment: A through groove is provided on the surface of the main shaft 3 around the edge of the grooved cavity above the interior of the main shaft 3. The length of the through groove matches the length of the outer top end of the clamping block 4. The position and quantity of the through grooves on the surface of the main shaft 3 match the position and quantity of the clamping blocks 4.

[0036] In this embodiment: It is convenient for the clamping block 4 to retract into the interior of the main shaft 3, which plays a certain role in allowing the main shaft 3 to penetrate through the rotor body 2 and rebound to be clamped.

[0037] In an alternative embodiment: The cross-sectional shape of the triangular block 8 is an equilateral triangle, and the compression spring 9 and the clamping block 4 are distributed at the three face positions of the triangular block 8. The overall shape of the clamping block 4 is the same as that of an isosceles trapezoid divided into three equal parts.

[0038] In this embodiment: The clamping block 4 can enter the interior of the main shaft 3 by extrusion, and can be relatively easily adjusted or removed, thus simplifying the maintenance and replacement process.

[0039] According to the above content, in order to evenly spread the adhesive over the space between the rotor body 2 and the main shaft 3 by high-speed rotation, it further includes a glue guiding groove 7 provided on the surface of the main shaft 3, a glue injection hole 6 provided on the outer side of the interior of the main shaft 3, a placement hole 10 provided in the middle of the interior of the main shaft 3, a polyvinyl alcohol ball 12 provided at the placement hole 10 in the middle of the interior of the main shaft 3, and a polyvinyl alcohol tube 11 provided at the glue injection hole 6 on the outer side of the interior of the main shaft 3.

[0040] In this implementation scheme: The adhesive that adheres the rotor body 2 and the main shaft 3 can be injected into the polyvinyl alcohol ball 12, the outer side of the rotor body 2 is heated to cause the polyvinyl alcohol ball 12 to rupture, and the rotor body 2 is rotated at high speed to allow the adhesive to be discharged outward from the injection hole and the glue guiding groove 7, and the adhesive is evenly spread over the space between the rotor body 2 and the main shaft 3.

[0041] In an alternative embodiment: The interior of the polyvinyl alcohol ball 12 is hollow and communicates with the polyvinyl alcohol tube 11. Moreover, the shape, size, and position of the polyvinyl alcohol ball 12 and the polyvinyl alcohol tube 11 match the shape, size, and position of the glue injection hole 6 and the placement hole 10. Adhesive is injected into the interior of the polyvinyl alcohol ball 12. The glue injection hole 6 is provided at the center of the glue guiding groove 7, and the length of the glue injection hole 6 is half of the length of one circle around the surface of the main shaft 3.

[0042] In this embodiment: The function of the glue guiding groove 7 is that the adhesive flows out of the glue injection hole 6 due to centrifugal force and spreads evenly along the glue guiding groove 7 between the rotor body 2 and the main shaft 3.

[0043] The working principle and usage process of the present utility model: Before installing the rotor body 2 and the stator body 1, the main shaft 3 needs to be installed inside the rotor body 2. First, insert the polyvinyl alcohol ball 12 together with the polyvinyl alcohol tube 11 into the positions of the placement hole 10 and the glue injection hole 6 opened on the surface of the main shaft 3. After installation, inject the adhesive into the interior of the polyvinyl alcohol ball 12 through the polyvinyl alcohol tube 11, and finally block it with a plug made of the same polyvinyl alcohol material. Then, insert the main shaft 3 at the end away from the fixing ring 5 into the rotor body 2 from bottom to top. The clamping block 4 on the outer side above the main shaft 3 is squeezed and retracted into the rotor body 2. The clamping block 4 drives the compression spring 9 at the inner top end to move towards the triangular block 8. The compression spring 9 deforms. Until the clamping block 4 completely enters the interior of the main shaft 3, the main shaft 3 continues to penetrate the interior of the rotor body 2 and slide upward. Until the bottom of the rotor body 2 touches the top of the fixing ring 5 welded on the outer side below the main shaft 3, the clamping block 4 also completely extends out of the interior of the rotor body 2. Due to the resilience of the compression spring 9, the clamping block 4 expands outward, clamping the rotor body 2 on the outer side of the main shaft 3. At this time, the main shaft 3 still cannot be fixed to the rotor body 2. Only need to heat the surface of the rotor body 2. After the heat is transferred to the position of the main shaft 3, the polyvinyl alcohol ball 12, the polyvinyl alcohol tube 11, and the plug made of the same polyvinyl alcohol material are thermally ruptured. The adhesive is in the placement hole 10. Then, rotate the main shaft 3 at a high speed. Through centrifugal force, let the adhesive be discharged outward from the placement hole 10 through the glue injection hole 6. With the guiding property of the glue guiding groove 7, let the adhesive evenly cover between the rotor body 2 and the main shaft 3. After rotating for about ten seconds, it can be cooled. The installation of the rotor body 2 and the main shaft 3 is completed. Finally, insert the rotor body 2 into the stator body 1.

[0044] Finally, it should be noted that: The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A stator-rotor core structure of a motor, comprising a stator body (1), characterized in that: Inside the stator body (1), a rotor body (2) is provided. Inside the rotor body (2), a main shaft (3) is slidably connected. Below the main shaft (3), a fixed ring (5) is fixedly connected to the outer side. In the middle of the upper part inside the main shaft (3), a triangular block (8) is fixedly connected. On the outer end face of the triangular block (8), a compression spring (9) is fixedly connected. The end of the compression spring (9) far from the triangular block (8) is fixedly connected to a clamping block (4).

2. The stator and rotor core structure of an electric machine according to claim 1, characterized in that: The outer side of the compression spring (9) contacts the upper part inside the main shaft (3). The outer side of the upper part inside the main shaft (3) contacts the surface of the clamping block (4). The bottom of the clamping block (4) contacts the top of the rotor body (2). The bottom of the rotor body (2) contacts the top of the fixed ring (5).

3. A stator and rotor core structure of an electric motor according to claim 1, characterized in that: A dug groove is provided in the upper part inside the main shaft (3). The cross-sectional shape of the dug groove in the upper part inside the main shaft (3) is circular, and the depth of the dug groove matches the height of the triangular block (8).

4. A stator and rotor core structure of an electric machine according to claim 1, characterized in that: A through groove is provided on the surface of the main shaft (3) around the edge of the dug groove in the upper part inside the main shaft (3). The length of the through groove matches the length of the outer top end of the clamping block (4). The position and number of the through grooves on the surface of the main shaft (3) match the position and number of the clamping blocks (4).

5. A stator and rotor core structure of an electric machine according to claim 1, wherein: The cross-sectional shape of the triangular block (8) is an equilateral triangle, and the compression spring (9) and the clamping block (4) are distributed at the three face positions of the triangular block (8). The overall shape of the clamping block (4) is the same as that of an isosceles trapezoid divided into three equal parts.

6. The stator and rotor core structure of an electric machine according to claim 1, characterized in that: A glue guiding groove (7) is provided on the surface of the main shaft (3). A glue injection hole (6) is provided on the outer side inside the main shaft (3). A placement hole (10) is provided in the middle inside the main shaft (3). At the placement hole (10) in the middle inside the main shaft (3), a polyvinyl alcohol ball (12) is provided. At the glue injection hole (6) on the outer side inside the main shaft (3), a polyvinyl alcohol tube (11) is provided.

7. The stator and rotor core structure of an electric machine according to claim 6, characterized in that: The inside of the polyvinyl alcohol ball (12) is in a hollow state and communicates with the polyvinyl alcohol tube (11). The shape, size, and position of the polyvinyl alcohol ball (12) and the polyvinyl alcohol tube (11) match the shape, size, and position of the glue injection hole (6) and the placement hole (10). Glue is injected into the inside of the polyvinyl alcohol ball (12). The glue injection hole (6) is provided at the center position of the glue guiding groove (7), and the length of the glue injection hole (6) is one-half of the length of one circle around the surface of the main shaft (3).

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