Optimized structure of magnetic steel embedded rotor
By opening mounting grooves on the outer circumference of the rotor core and fitting steel sleeves, the problem of low processing efficiency of rotors with embedded magnets is solved, enabling efficient and low-cost small-batch production without affecting rotor performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU RUIHENG SCI&TECH CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-06-16
AI Technical Summary
In the existing technology, the processing efficiency of magnet-embedded rotors is low, especially in small-batch production. The stamping die cost is high, and wire cutting is time-consuming and labor-intensive, and it also affects the rotor performance.
An installation groove is made on the outer circumference of the rotor core and a steel sleeve is fitted on it. Silicon steel sheets are connected by rivets to form the rotor core. An installation groove is machined on the outer circumference to embed magnets. The machining of wire holes is avoided and the process is completed in one go by wire cutting.
It improves processing efficiency, ensures a stable rotor structure, maintains unaffected performance, reduces production costs, and is suitable for small-batch production.
Smart Images
Figure CN224367605U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of permanent magnet rotary motor technology, specifically to an optimized structure for a magnet-embedded rotor. Background Technology
[0002] In conventional permanent magnet rotary motors, the rotor magnets are typically surface-bonded to the surface of the rotor core; this structure is widely used (see reference). Figure 1 However, some rotors with special structures are limited by the space available in the motor and can only use a structure with embedded magnets (see reference). Figure 2 This type of embedded magnet structure requires machining square holes in the rotor core before embedding the magnets. However, machining these square holes in the rotor core is quite complicated. For mass production, stamping dies can be used, but the cost of stamping dies is high, making them unsuitable for single-piece or small-batch production. For small-batch production, wire cutting can be used to machine the square holes by creating wire-threading holes in the rotor core (see reference). Figure 3 The wire cutting wire is then threaded through the wire threading hole before wire cutting can begin to process the square holes for the magnet. However, since these square holes are independent of each other, the wire cutting wire needs to be threaded again before processing each square hole, resulting in low processing efficiency and wasting time and effort. Utility Model Content
[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing an optimized structure for a magnet-embedded rotor, thereby solving the problems mentioned in the background art.
[0004] To achieve this objective, the present invention adopts the following technical solution:
[0005] An optimized structure for a magnet-embedded rotor includes a rotor core. The outer circumference of the rotor core has several mounting slots, which are spaced apart along the circumferential direction of the rotor core. Each mounting slot is inlaid with a magnet. The outer surface of the rotor core is also fitted with a steel sleeve, which is interference-fitted with the rotor core.
[0006] As a preferred embodiment of the optimized structure of the magnet-embedded rotor, the rotor core includes several silicon steel sheets, which are stacked in layers, and each silicon steel sheet has several connecting holes. The connecting holes are spaced apart along the circumference of the silicon steel sheet, and the connecting holes of each silicon steel sheet correspond one-to-one. The rotor core is formed by riveting the connecting holes together with rivets.
[0007] As a preferred embodiment of the optimized structure of the magnet embedded rotor, the mounting slots are spaced apart on the outer circumference of each silicon steel sheet, and the mounting slots of each silicon steel sheet are in one-to-one correspondence.
[0008] As a preferred embodiment of the optimized structure of the magnet-embedded rotor, the distance from the connecting hole to the center of the silicon steel sheet is less than the distance from the mounting groove to the center of the silicon steel sheet.
[0009] As a preferred embodiment of the optimized structure for magnet-embedded rotors, the mounting slot is a square structure.
[0010] The beneficial effects of this utility model are:
[0011] This invention creates a new embedded rotor structure by machining a magnet mounting groove on the outer circumference of the rotor core and then fitting a steel sleeve around the rotor core. This rotor structure eliminates the need for wire cutting and the cutting machine can be completed in one go without interruption, significantly improving processing efficiency. Furthermore, the optimized rotor structure does not alter the rotor's magnetic field and does not affect its performance parameters. Attached Figure Description
[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly described below. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.
[0013] Figure 1 This is a schematic diagram of the existing technology of attaching magnets to the rotor core.
[0014] Figure 2 This is a schematic diagram of the existing magnet-embedded rotor structure.
[0015] Figure 3 This is a schematic diagram of the wire-threading hole structure for developing an embedded magnet rotor in existing technology.
[0016] Figure 4 This is a schematic diagram of the rotor core described in this utility model.
[0017] Figure 5 This is a schematic diagram of the structure of the rotor core of this utility model when a thick steel sleeve is fitted.
[0018] Figure 6 This is a top view schematic diagram of the optimized structure of the magnet embedded rotor described in this utility model.
[0019] Figure 7 This is a cross-sectional schematic diagram of the optimized structure of the magnet embedded rotor described in this utility model.
[0020] Figures 1 to 3 middle:
[0021] 1' Externally bonded rotor; 2' Externally bonded magnet; 3' Embedded rotor; 4' Embedded magnet; 5' Wire threading hole;
[0022] Figures 4 to 7 middle:
[0023] 1. Rotor core; 11. Silicon steel sheet; 12. Connecting hole; 2. Mounting slot; 3. Magnet; 4. Steel sleeve. Detailed Implementation
[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0025] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.
[0026] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0028] like Figure 6 and Figure 7As shown, this utility model provides an optimized structure for a magnet-embedded rotor, including a rotor core 1. The outer circumference of the rotor core 1 is provided with a plurality of mounting slots 2, which are spaced apart along the circumferential direction of the rotor core 1. Each mounting slot 2 is inlaid with a magnet 3. The mounting slots 2 are preferably square to accommodate the shape of the magnet 3. At the same time, a steel sleeve 4 is also fitted on the outer surface of the rotor core 1. The steel sleeve 4 is interference-fitted with the rotor core 1, so that the steel sleeve 4 and the rotor core 1 are better integrated into one body.
[0029] Specifically, the rotor core 1 in this embodiment includes a plurality of silicon steel sheets 11, which are stacked in layers. The number of silicon steel sheets 11 can be selected according to the required thickness of the rotor. Each silicon steel sheet 11 has a plurality of connecting holes 12, which are spaced apart along the circumference of the silicon steel sheet 11. The connecting holes 12 of each silicon steel sheet 11 are in one-to-one correspondence. During the production process, multiple silicon steel sheets 11 can be riveted together to form the rotor core 1 by passing rivets through the connecting holes 12.
[0030] More specifically, in this embodiment, the mounting slots 2 are spaced apart on the outer circumference of each silicon steel sheet 11, and the mounting slots 2 of each silicon steel sheet 11 are in one-to-one correspondence to each other, so as to facilitate the embedding of magnets 3.
[0031] Preferably, in this embodiment, the distance from the connecting hole 12 to the center of the silicon steel sheet 11 is less than the distance from the mounting groove 2 to the center of the silicon steel sheet 11.
[0032] The specific processing procedure for the optimized magnet-embedded rotor structure of this utility model is as follows:
[0033] Step 1: Stack the silicon steel sheets 11 on top of each other to achieve the required thickness, and use rivets to pass through the connecting holes 12 to rivet and fix the stacked silicon steel sheets 11 into an integral rotor core 1.
[0034] Step 2: An open mounting groove 2 is machined by cutting along the outer circumference of the rotor core 1. The groove shape of the mounting groove 2 matches the shape of the magnet 3 (see reference). Figure 4 );
[0035] Step 3: Select a steel sleeve 4 of appropriate thickness and fit it onto the rotor core 1 with an interference fit, so that the steel sleeve 4 and the rotor core 1 are integrated as one unit (see reference). Figure 5 );
[0036] Step 4: The outer diameter of the steel sleeve 4 is machined to achieve the required outer diameter dimension (see reference). Figure 6 );
[0037] Step 5: Apply adhesive to the surface of magnet 3 and then embed it into the mounting slot 2 of rotor core 1. The rotor processing is now complete.
[0038] This invention features an open slot for the magnet 3 embedded in the outer circumference of the rotor core 1. This slot structure eliminates the need for wire cutting and the cutting machine can be completed in one go without interruption, significantly improving processing efficiency. Furthermore, a steel sleeve 4 is fitted around the outer circumference of the rotor core 1, making the overall structure more stable. The appropriate thickness of the steel sleeve 4 effectively prevents deformation during installation. The sleeve is then machined to the required outer diameter. The optimized rotor structure of this invention does not alter the rotor's magnetic field or affect its performance parameters.
[0039] It should be stated that the above-described specific embodiments are merely preferred embodiments of this utility model and the technical principles employed. Those skilled in the art should understand that various modifications, equivalent substitutions, and variations can be made to this utility model. However, such variations, as long as they do not depart from the spirit of this utility model, should be within the protection scope of this utility model. Furthermore, some terminology used in this application specification and claims is not limiting, but merely for ease of description.
Claims
1. An optimized structure for a magnet-embedded rotor, characterized in that, The rotor core (1) includes a rotor core (1) with a plurality of mounting slots (2) on its outer circumference. The mounting slots (2) are spaced apart along the circumferential direction of the rotor core (1), and each mounting slot (2) is inlaid with a magnet (3). A steel sleeve (4) is also fitted on the outer surface of the rotor core (1), and the steel sleeve (4) is interference-fitted with the rotor core (1).
2. The optimized structure of the magnet-embedded rotor according to claim 1, characterized in that, The rotor core (1) includes a plurality of silicon steel sheets (11), which are stacked in layers, and each silicon steel sheet (11) has a plurality of connecting holes (12). The connecting holes (12) are spaced apart along the circumference of the silicon steel sheet (11), and the connecting holes (12) of each silicon steel sheet (11) are in one-to-one correspondence. The rotor core (1) is formed by riveting through the connecting holes (12) with rivets.
3. The optimized structure of the magnet-embedded rotor according to claim 2, characterized in that, The mounting slots (2) are spaced apart on the outer circumference of each silicon steel sheet (11), and the mounting slots (2) of each silicon steel sheet (11) are in one-to-one correspondence.
4. The optimized structure of the magnet-embedded rotor according to claim 3, characterized in that, The distance from the connecting hole (12) to the center of the silicon steel sheet (11) is less than the distance from the mounting groove (2) to the center of the silicon steel sheet (11).
5. The optimized structure of the magnet-embedded rotor according to claim 1, characterized in that, The mounting slot (2) has a square structure.