Spliced rotor structure and tool

Abstract

The utility model provides a splicing type rotor structure and a tool, the splicing type rotor structure comprises a rotating shaft, and the rotating shaft is provided with a positioning hole; the multiple sections of rotor iron cores are arranged on the rotating shaft in a stacked and sleeved mode, a plurality of limiting strips are arranged in the circumferential direction of the rotor iron cores, and a limiting groove is formed between every two adjacent limiting strips; the limiting grooves are matched with the magnets; the two rotor end plates are arranged on the rotating shaft in a sleeving mode, the two rotor end plates are located at the two ends of the multiple sections of rotor iron cores which are arranged in a stacked mode respectively, each rotor end plate comprises a first connecting part and a second connecting part, and a connecting through hole is formed in each first connecting part; a fixing pin penetrates through the connecting through hole and the positioning hole to fix one of the rotor end plates at one end of the rotating shaft, and one side, deviating from the first connecting part, of the second connecting part is connected with the end face of the rotor iron core in an adhesive mode. According to the utility model, the low-cost manufacturing requirement of a long-size rotor can be met, and the applicability is high.

Description

Technical Field

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

[0002] Compared with traditional brushed motors, brushless motors have the advantages of high efficiency and energy saving, high precision control and high reliability, and are widely used in industrial automation, drones and other fields.

[0003] The rotor structure of a brushless motor mainly consists of a rotor core, a shaft, and permanent magnets. Currently, the rotor core and permanent magnets in internal rotation brushless motors are generally designed as a single unit. This design is not suitable for long rotor structures. First, the machining of integral permanent magnets, rotor cores, and other components is more difficult, and the machining accuracy is hard to guarantee. In actual machining, a large amount of material is easily wasted, resulting in low machining efficiency and high production costs. Second, when the integral rotor core or permanent magnets are partially damaged during use, disassembling the rotor structure is time-consuming and labor-intensive, and the entire rotor structure must be replaced, resulting in high maintenance costs. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a spliced ​​rotor structure and tooling, which aims to solve the technical problems that the rotor core and permanent magnet in the existing internal rotation brushless motor are generally designed as an integral unit, which is not suitable for long rotor structures. The integral permanent magnet and rotor core are difficult to process and have high production costs. Furthermore, when the integral rotor core or permanent magnet is partially damaged during use, the entire rotor structure must be replaced, resulting in high maintenance costs.

[0005] One aspect of this utility model is to provide a spliced ​​rotor structure, comprising:

[0006] A rotating shaft, one end of which is provided with a positioning hole, the positioning hole being arranged radially along the rotating shaft;

[0007] At least two rotor core segments are stacked and sleeved on the rotating shaft. Each rotor core segment is provided with multiple limiting strips in the circumferential direction. The limiting strips are arranged along the axial direction of the rotor core, and a limiting groove is provided between two adjacent limiting strips.

[0008] Multiple magnets, wherein the limiting groove is adapted to the shape of the magnet for mounting the magnet;

[0009] Two rotor end plates are sleeved on the rotating shaft. The two rotor end plates are respectively located at both ends of the multiple stacked rotor core segments. Each rotor end plate includes a first connecting part and a second connecting part integrally connected to the first connecting part. The first connecting part is provided with a connecting through hole. A fixing pin passes through the connecting through hole and the positioning hole to fix one of the rotor end plates to one end of the rotating shaft. The side of the second connecting part opposite to the first connecting part is connected to the end face of the rotor core by adhesive.

[0010] Furthermore, the total length of the fixing pin is greater than the outer diameter of the first connecting part, and the second connecting part is provided with an annular glue-applying groove on the side opposite to the first connecting part.

[0011] Furthermore, the rotor core is provided with a mounting through hole for the rotating shaft to pass through, and the mounting through hole has grooves on two opposite sides of its wall, the grooves being arranged along the axial direction of the rotor core.

[0012] Furthermore, the circumferential surface of the rotating shaft is provided with a plurality of raised ribs at intervals. The raised ribs are arranged along the axial direction of the rotating shaft, and the total length of the raised ribs is greater than or equal to the total length of the multiple segments of the rotor core stacked together. The circumferential surface of the rotating shaft is press-fitted with the wall of the mounting through hole through the raised ribs.

[0013] Another aspect of this utility model is to provide a tooling for assembling the above-mentioned spliced ​​rotor structure. The tooling includes a limiting post and a guide assembly. The limiting post and the guide assembly cooperate with each other to achieve a one-to-one correspondence between the limiting slots on different rotor cores. The limiting post is provided with a stepped through hole. The stepped surface in the stepped through hole is used to abut against the side of the second connecting part that is connected to the first connecting part. The inner diameter of the small hole of the stepped through hole is larger than the total length of the fixing pin, and the inner diameter of the large hole of the stepped through hole is larger than the outer diameter of the second connecting part.

[0014] Furthermore, the guiding assembly includes a guide post and two guide rods. The large hole end face on the limiting post is used to abut against the end face of the guide post. The guide post is provided with a guide through hole. A guide groove is provided on each of the two opposite sides of the guide through hole wall. The inner diameter of the guide through hole is greater than the total radial length of the rotor core. The limiting groove and the guide groove are respectively adapted to the outer contour shape of the two opposite sides of the guide rod. The distance between the groove walls of the two guide grooves is greater than the inner diameter of the large hole of the stepped through hole.

[0015] Furthermore, the tooling also includes a clamping assembly for clamping the mating points of multiple magnets located on different rotor cores. The clamping assembly includes two clamping blocks and two connecting bolts. The two clamping blocks together form a clamping space for clamping multiple magnets. Each end of the clamping block is provided with a fixing through hole, which is threadedly connected to the connecting bolt.

[0016] Compared with existing technologies, the advantages of the spliced ​​rotor structure and tooling of this utility model are as follows:

[0017] The modular rotor structure of this application meets the low-cost manufacturing requirements of long rotors and has high applicability. Specifically, the modular rotor structure of this application can disassemble the long rotor core and magnets into multiple smaller cores and magnets for separate manufacturing, significantly reducing manufacturing difficulty and cost while ensuring performance. Furthermore, multiple axially oriented limiting strips and grooves arranged circumferentially on the multi-segment rotor cores, in conjunction with the shape-matched magnets, not only facilitate precise magnet installation but also limit the magnets through the limiting strips, enhancing the overall stability and balance of the rotor structure and reducing vibration and noise caused by improper component installation. In addition, when the rotor structure suffers partial damage, the rotor end plate can be quickly separated from the shaft by removing the fixing pin, making disassembly very convenient for rapid replacement of internally damaged rotor cores or magnets, greatly reducing maintenance costs.

[0018] In the assembly process of the above-mentioned spliced ​​rotor structure, the tooling structure in this application is simple, easy to use, and can quickly assemble multiple rotor cores and multiple magnets. The entire assembly process is very simple. The limiting posts and guide components cooperate with each other to accurately achieve one-to-one correspondence of the upper limit slots of different rotor cores, which greatly improves the accuracy and efficiency of assembly. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the spliced ​​rotor structure of this utility model;

[0020] Figure 2 This is an exploded view of the spliced ​​rotor structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the rotor core structure in the spliced ​​rotor structure of this utility model;

[0022] Figure 4 This is a structural diagram of the rotor core in the spliced ​​rotor structure of this utility model from a certain perspective;

[0023] Figure 5This is a structural diagram of the rotor end plate in the spliced ​​rotor structure of this utility model from a first-view perspective.

[0024] Figure 6 This is a structural diagram of the rotor end plate in the spliced ​​rotor structure of this utility model from a second perspective.

[0025] Figure 7 This is a schematic diagram of the guide column in the tooling of this utility model;

[0026] Figure 8 This is a schematic diagram illustrating the use of the limiting post and guide assembly in the tooling of this utility model;

[0027] Figure 9 This is a cross-sectional schematic diagram of the limiting post and guide assembly in the tooling of this utility model under the condition of use;

[0028] Figure 10 This is a schematic diagram of the clamping block in the clamping assembly of the tooling of this utility model;

[0029] Figure 11 This is a schematic diagram illustrating the use of the clamping component in the tooling of this utility model;

[0030] Figure 12 This is a cross-sectional schematic diagram of the clamping component in the tooling of this utility model in use.

[0031] The above-mentioned drawings include the following reference numerals: 10-rotating shaft; 11-protruding rib; 101-positioning hole; 20-rotor core; 21-limiting strip; 201-limiting groove; 202-mounting through hole; 203-groove; 30-magnet; 40-rotor end plate; 41-first connecting part; 42-second connecting part; 401-connecting through hole; 402-annular glue coating groove; 50-fixing pin; 60-limiting post; 601-stepped through hole; 71-guide post; 72-guide rod; 701-guide through hole; 702-guide groove; 81-clamping block; 811-clamping part; 812-fixing part; 82-connecting bolt; 801-fixing through hole.

[0032] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0033] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0034] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] Please see Figures 1 to 6 The diagram shows the spliced ​​rotor structure of this utility model, including a rotating shaft 10, at least two rotor core segments 20, multiple magnets 30, and two rotor end plates 40. One end of the rotating shaft 10 has a positioning hole 101 arranged radially along the shaft. Multiple raised ribs 11 are spaced apart on the circumferential surface of the rotating shaft 10, arranged axially along the shaft. The total length of the raised ribs 11 is the same as the total length of the stacked rotor core segments 20. The multiple rotor core segments 20 are stacked and fitted onto the rotating shaft 10. Each rotor core 20 has multiple limiting strips 21 arranged circumferentially along the axial direction. A limiting groove 201 is provided between adjacent limiting strips 21, and the limiting groove 201 is adapted to the shape of the magnet 30 for mounting the magnet 30. The rotor core 20 is provided with a mounting through hole 202 for the rotating shaft 10 to pass through. Grooves 203 are respectively provided on two opposite sides of the mounting through hole 202. The grooves 203 are arranged along the axial direction of the rotor core 20. When the rotor core 20 is fitted onto the rotating shaft 10, the circumferential surface of the rotating shaft 10 is press-fitted with the wall of the mounting through hole 202 through raised ribs 11. As a specific example, in this embodiment, two sections of rotor core 20 are fitted onto the rotating shaft 10. The circumferential limiting groove 201 of the rotor core 20 is a rectangular groove. The total length of a single magnet 30 is consistent with the total length of a single limiting groove 201. It can also be understood that in this embodiment, the rotor core 20 is divided into two sections, and the corresponding magnet 30 is also divided into two sections, with the same number of segments. It should be noted that in actual application, the length of the magnet 30 may not be consistent with the number of segments of the rotor core 20.

[0037] Rotor end plates 40 are sleeved on the rotating shaft 10. Two rotor end plates 40 are located at both ends of the stacked multi-segment rotor core 20. The total radial length of the rotor end plates 40 is less than the total radial length of the rotor core 20 after it is filled with magnets 30. In this embodiment, the rotor end plates 40 include a first connecting portion 41 and a second connecting portion 42 integrally connected to the first connecting portion 41. The first connecting portion 41 is provided with a connecting through hole 401. The second connecting portion 42 is provided with an annular glue-applying groove 402 on the side opposite to the first connecting portion 41. The annular glue-applying groove 402 is used to accommodate glue. The side of the second connecting portion 42 opposite to the first connecting portion 41 is connected to the end face of the rotor core 20 by adhesive bonding. Further, a fixing pin 50 passes through the connecting through hole 401 and the positioning hole 101 to fix one of the rotor end plates 40 to one end of the rotating shaft 10. The total length of the fixing pin 50 is greater than the outer diameter of the first connecting portion 41. As a specific example, in this embodiment, the fixing pin 50 is an elastic cotter pin. The elastic cotter pin is elastic and can compress the size of the opening so that the entire elastic cotter pin can smoothly pass through the connecting through hole 401 and the positioning hole 101, and then achieve the purpose of locking and positioning through springback expansion.

[0038] Furthermore, the rotor core 20 is provided with a mounting through hole 202 through which the rotating shaft 10 passes. The two opposite sides of the mounting through hole 202 are respectively provided with grooves 203. The grooves 203 are arranged along the axial direction of the rotor core 20. As a specific example, in this embodiment, the cross-section of the groove 203 is semi-circular.

[0039] Furthermore, a plurality of raised ribs 11 are spaced apart on the circumferential surface of the rotating shaft 10. The raised ribs 11 are arranged along the axial direction of the rotating shaft 10, and the total length of the raised ribs 11 is greater than or equal to the total length of the stacked rotor core segments 20. The circumferential surface of the rotating shaft 10 is press-fitted with the wall of the mounting through hole 202 through the raised ribs 11. In practical applications, when the wall of the mounting through hole 202 is press-fitted with the raised ribs 11, the groove 203 on the wall of the mounting through hole 202 can play a role in stress unloading, which can effectively prevent the rotor core 20 from being damaged by excessive pressure caused by the press-fit, thereby ensuring the structural integrity and functional stability of the rotor core 20 during use.

[0040] Please see Figures 7 to 12This utility model also provides a tooling for assembling the above-mentioned spliced ​​rotor structure. Specifically, the tooling includes a limiting post 60 and a guide assembly. The limiting post 60 and the guide assembly cooperate with each other to achieve a one-to-one correspondence between the limiting slots 201 on different rotor cores 20. The limiting post 60 is provided with a stepped through hole 601. The stepped through hole 601 is arranged along the axial direction of the limiting post 60. The stepped surface in the stepped through hole 601 is used to abut against the side of the second connecting part 42 that is connected to the first connecting part 41. The inner diameter of the small hole of the stepped through hole 601 is larger than the total length of the fixing pin 50, and the inner diameter of the large hole of the stepped through hole 601 is larger than the outer diameter of the second connecting part 42 of the rotor end plate 40.

[0041] Furthermore, the guide assembly includes a guide post 71 and two guide rods 72. The large hole end face on the limiting post 60 is used to abut against the end face of the guide post 71. The guide post 71 is provided with a guide through hole 701. A guide groove 702 is provided on each of the two opposite sides of the hole wall of the guide through hole 701. The inner diameter of the guide through hole 701 is greater than the total radial length of the rotor core 20. The limiting groove 201 and the guide groove 702 are respectively adapted to the outer contour shape of the two opposite sides of the guide rod 72. The limiting groove 201, the guide groove 702 and the guide rod 72 are in clearance fit. The distance between the groove walls of the two guide grooves 702 is greater than the inner diameter of the large hole of the stepped through hole 601.

[0042] Furthermore, the tooling also includes a clamping assembly, which is used to clamp the mating points of multiple magnets 30 located on different rotor cores 20 to achieve radial clamping and limiting of the magnets 30. The clamping assembly includes two clamping blocks 81 and two connecting bolts 82. The two clamping blocks 81 together form a clamping space for clamping multiple magnets 30. Each end of the clamping block 81 is provided with a fixing through hole 801, which is threadedly connected to the connecting bolts 82. In this embodiment, the clamping block 81 includes a clamping part 811 and a fixing part 812 integrally connected to both ends of the clamping part 811. The clamping part 811 has an arc-shaped structure, and the fixing part 812 is provided with a fixing through hole 801 adapted to the connecting bolts 82.

[0043] In practical use, the assembly steps of the tooling of this utility model for the spliced ​​rotor structure can be as follows: First, insert one end of the rotating shaft 10 with the positioning hole 101 into a rotor end plate 40, and make the annular glue groove 402 on the rotor end plate 40 face the side where the protruding rib 11 of the rotating shaft 10 is located. The connecting through hole 401 on the rotor end plate 40 is connected to the positioning hole 101. Then, the fixing pin 50 is passed through the connecting through hole 401 and the positioning hole 101 in sequence to fix the rotor end plate 40 on the rotating shaft 10.

[0044] Next, adhesive is applied to the annular adhesive groove 402 on the rotor end plate 40, and a section of rotor core 20 is pressed from the other end of the shaft 10 into the end face of the rotor end plate 40. Then, the shaft 10, carrying the rotor core 20 and rotor end plate 40, is passed sequentially through the guide post 71 and the limiting post 60, such that the first connecting part 41 on the rotor end plate 40 is located within the small hole of the limiting post 60, and the side of the second connecting part 42 facing away from the rotor core 20 abuts against the stepped surface inside the limiting post 60. At this time, the total length of the shaft 10 located within the small hole of the limiting post 60 is less than the hole depth of the limiting post 60, the total length of the rotor core 20 is greater than the hole depth of the large hole of the limiting post 60, and the circumferential outer edges of both the rotor end plate 40 and the rotor core 20 are clearance-fitted with the wall of the large hole of the limiting post 60. Figures 8 to 9 As shown, when pressing in another rotor core 20, a guide rod 72 is used to guide it so that the limiting grooves 201 on the two rotor cores 20 can correspond one by one, and an external force is applied so that the two rotor cores 20 can be pressed into a whole.

[0045] Finally, remove the guide rod 72, guide post 71, and limiting post 60 to fully expose the rotor core 20. Apply an appropriate amount of adhesive to each limiting groove 201 on the rotor core 20. First, install the magnet 30 into the corresponding limiting groove 201 on one rotor core 20. Then, assemble the clamping assembly, that is, connect the two clamping blocks 81 and the two connecting bolts 82, and fit them onto the end of the magnet 30 near the other rotor core 20. At this time, press the magnet 30 into the limiting groove 201 on the other rotor core 20, and install another rotor end plate 40 with adhesive coated in the annular adhesive groove 402. At this time, a repulsive phenomenon will occur between the mating points of the magnets 30 on the two rotor cores 20. By rotating the connecting bolts 82, the two clamping blocks 81 are gradually brought closer and pressure is applied to the mating points of the magnets 30, thereby achieving radial limiting of the magnets 30. Figures 11 to 12 As shown, the clamping block 81 presses the magnets 30 together to overcome the repulsive force between the magnets 30, effectively preventing the magnets 30 from arching due to the repulsive force, ensuring the compactness and stability of the entire rotor core 20 assembly structure, and guaranteeing the reliability of subsequent equipment operation.

[0046] In summary, the advantages of the spliced ​​rotor structure and tooling of this utility model are as follows: Compared with the existing integral rotor structure, the spliced ​​rotor structure of this application can disassemble the long rotor core and magnets into multiple smaller cores and magnets for separate manufacturing, significantly reducing manufacturing difficulty and cost while ensuring performance. Furthermore, the multiple axially oriented limiting strips and grooves arranged circumferentially on the multi-segment rotor cores, in conjunction with the shape-matched magnets, not only facilitate precise magnet installation but also limit the magnets through the limiting strips, enhancing the overall stability and balance of the rotor structure and reducing vibration and noise caused by improper component installation. When partial damage occurs to the rotor structure, the rotor end plate can be quickly separated from the shaft by removing the fixing pins, allowing for rapid replacement of the damaged rotor core or magnets, greatly reducing maintenance costs. In the assembly process of the spliced ​​rotor structure, the tooling structure in this application is simple, easy to use, and can quickly assemble multiple rotor cores and multiple magnets. The limiting posts and guide components cooperate with each other to accurately achieve one-to-one correspondence of the upper limit slots of different rotor cores, which greatly improves the accuracy and efficiency of assembly.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model application should be determined by the appended claims.

Claims

1. A spliced ​​rotor structure, characterized in that, include: A rotating shaft, one end of which is provided with a positioning hole, the positioning hole being arranged radially along the rotating shaft; At least two rotor core segments are stacked and sleeved on the rotating shaft. Each rotor core segment is provided with multiple limiting strips in the circumferential direction. The limiting strips are arranged along the axial direction of the rotor core, and a limiting groove is provided between two adjacent limiting strips. Multiple magnets, wherein the limiting groove is adapted to the shape of the magnet for mounting the magnet; Two rotor end plates are sleeved on the rotating shaft. The two rotor end plates are respectively located at both ends of the multiple stacked rotor core segments. Each rotor end plate includes a first connecting part and a second connecting part integrally connected to the first connecting part. The first connecting part is provided with a connecting through hole. A fixing pin passes through the connecting through hole and the positioning hole to fix one of the rotor end plates to one end of the rotating shaft. The side of the second connecting part opposite to the first connecting part is connected to the end face of the rotor core by adhesive.

2. The spliced ​​rotor structure according to claim 1, characterized in that, The total length of the fixing pin is greater than the outer diameter of the first connecting part, and the second connecting part is provided with an annular glue-applying groove on the side opposite to the first connecting part.

3. The spliced ​​rotor structure according to claim 1, characterized in that, The rotor core is provided with a mounting through hole for the rotating shaft to pass through. The mounting through hole has grooves on two opposite sides of its wall, and the grooves are arranged along the axial direction of the rotor core.

4. The spliced ​​rotor structure according to claim 3, characterized in that, The circumferential surface of the rotating shaft is provided with a plurality of raised ribs at intervals. The raised ribs are arranged along the axial direction of the rotating shaft, and the total length of the raised ribs is greater than or equal to the total length of the multiple segments of the rotor core stacked thereon. The circumferential surface of the rotating shaft is press-fitted with the wall of the mounting through hole through the raised ribs.

5. A tooling, characterized in that, The tooling is used for assembling the spliced ​​rotor structure as described in any one of claims 1 to 4. The tooling includes a limiting post and a guide assembly. The limiting post and the guide assembly cooperate with each other to achieve a one-to-one correspondence between the limiting slots on different rotor cores. The limiting post is provided with a stepped through hole. The stepped surface in the stepped through hole is used to abut against the side of the second connecting part that is connected to the first connecting part. The inner diameter of the small hole of the stepped through hole is larger than the total length of the fixing pin, and the inner diameter of the large hole of the stepped through hole is larger than the outer diameter of the second connecting part.

6. The tooling according to claim 5, characterized in that, The guiding assembly includes a guide post and two guide rods. The large hole end face on the limiting post is used to abut against the end face of the guide post. The guide post is provided with a guide through hole. A guide groove is provided on each of the two opposite sides of the guide through hole wall. The inner diameter of the guide through hole is greater than the total radial length of the rotor core. The limiting groove and the guide groove are respectively adapted to the outer contour shape of the two opposite sides of the guide rod. The distance between the groove walls of the two guide grooves is greater than the inner diameter of the large hole of the stepped through hole.

7. The tooling according to claim 5, characterized in that, The tooling also includes a clamping assembly for clamping the joints of multiple magnets located on different rotor cores. The clamping assembly includes two clamping blocks and two connecting bolts. The two clamping blocks together form a clamping space for clamping multiple magnets. Each end of the clamping block is provided with a fixing through hole, which is threadedly connected to the connecting bolt.

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