A new rotor core punching and riveting structure

Abstract

The utility model discloses a novel rotor core punching piece stack riveting structure belongs to rotor core technical field, including rotor punching piece one, rotor punching piece two, rotor punching piece three and rotor shaft, the rotor punching piece one adopts closed type installation, and the outer edge of each rotor punching piece one is fixedly connected through being provided with the continuous piece. The utility model has the advantages of being provided with the continuous piece structure, compared with the old punching piece stack riveting mode, each adding a continuous piece punching piece on the upper and lower two end faces of the iron core that needs to be stacked and riveted, the other stack riveting buckle point shape and stack riveting point number remain unchanged, and the combination force of the half -finished product iron core punching piece collocation structure is about 40% to 50% higher than that of the traditional stack riveting structure, and the hidden danger of insufficient combination force of the high stack thickness rotor core due to too many punching pieces (the effective punching piece number of the rotor core remains unchanged) is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of rotor core technology, specifically a novel rotor core lamination stacking and riveting structure. Background Technology

[0002] After the rotor core laminations are stamped, they need to be stacked and riveted. The stacking points are generally designed according to the geometry of the laminations and the electromagnetic performance requirements. Common forms include cylindrical, V-shaped, L-shaped and T-shaped. In addition, the number and distribution of stacking points need to be symmetrical and uniform. The greater the bonding force, the more stacking points there are.

[0003] The core of traditional rotor lamination bonding force lies in the design of the lamination points, mold precision, and process control. Reasonable interference and symmetrically distributed lamination points can meet the bonding force requirement of 80-100N (close-stacked). However, with the improvement of energy efficiency of brushless motor products and the power performance requirements of high-power end products, high-thickness (greater than 15mm) rotor cores have become a major component. Relying on the traditional "close-stacked" process, it is difficult to ensure that the semi-finished rotor core material will not scatter or separate during handling and injection molding, which indirectly leads to vibration or noise in the alternating magnetic field. Utility Model Content

[0004] To address the problems mentioned in the background section, this invention provides a novel rotor core lamination stacking and riveting structure with a continuous lamination structure. The core issue in solving the traditional rotor lamination bonding force problem lies in the design of the riveting points, mold precision, and process control. A reasonable interference fit and symmetrically distributed lamination stacking and riveting points can meet the bonding force requirement of 80-100N (close-stacked). However, with the improvement of energy efficiency in brushless motor products and the power performance requirements of high-power end products, thicker (greater than 15mm) rotor cores have become a major component. Relying on the traditional "close-stacked" process makes it difficult to ensure that the semi-finished rotor core material does not scatter or separate during handling and injection molding, indirectly leading to vibration or noise in the alternating magnetic field.

[0005] The technical solution of this utility model is: a novel rotor core lamination stacking and riveting structure, including rotor lamination one, rotor lamination two, rotor lamination three and rotor shaft. The rotor lamination one is installed in a closed manner, and the outer edges of each rotor lamination one are fixedly connected by connecting pieces. The rotor lamination one and rotor lamination two are installed by riveting, and the rotor lamination two and rotor lamination three are installed by riveting. The rotor lamination one is located at the upper and lower end faces of the rotor core.

[0006] Furthermore, rotor lamination one, rotor lamination two, and rotor lamination three are fixedly connected to the outer wall of the rotor shaft via connecting blocks.

[0007] Furthermore, the rotor shaft has a shaft hole inside, and the rotor shaft has protruding teeth on the outside, located inside rotor lamination one and rotor lamination two. The protruding teeth are evenly spaced from each rotor lamination one and rotor lamination two.

[0008] Furthermore, rotor slots are formed between rotor lamination 1, rotor lamination 2, and rotor lamination 3, and magnetic isolation slots and ventilation slots are opened inside rotor lamination 1, rotor lamination 2, and rotor lamination 3.

[0009] Furthermore, positioning grooves are formed on the outer walls of both sides of rotor lamination one, rotor lamination two, and rotor lamination three.

[0010] This utility model provides a novel rotor core lamination stacking and riveting structure through improvements, which has the following improvements and advantages compared with the prior art:

[0011] By incorporating a continuous lamination structure, compared to the old-fashioned lamination stacking method, an additional continuous lamination is added to each of the upper and lower end faces of the core that needs to be stacked. The shape and number of other stacking points remain unchanged. Verification has shown that this semi-finished core lamination combination structure has a bonding force that is about 40%-50% higher than the traditional stacking structure. It effectively solves the hidden danger of insufficient bonding force in high-thickness rotor cores due to an excessive number of laminations (the effective number of laminations in the rotor core remains unchanged). While retaining the T-hole stacking structure design and the total thickness of the rotor, an additional continuous lamination structure is added to each of the upper and lower end faces, resulting in an effective bonding force of 130N. At the same time, it effectively solves the problem of abnormal core deformation during turnover (without changing material costs). Attached Figure Description

[0012] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0013] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0014] Figure 2 This is a three-dimensional schematic diagram of the rotor lamination of this utility model;

[0015] Figure 3 This is a two-dimensional schematic diagram of the rotor lamination of this utility model;

[0016] Figure 4 This is a three-dimensional schematic diagram of the rotor lamination of this utility model;

[0017] Explanation of reference numerals in the attached drawings: 1. Rotor lamination 1; 2. Rotor lamination 2; 3. Rotor lamination 3; 4. Rotor shaft; 5. Shaft hole; 6. Rotor slot; 7. Magnetic isolation slot; 8. Connecting block; 9. Positioning slot; 10. Connecting piece. Detailed Implementation

[0018] The following will be combined with the appendix Figures 1 to 4 This utility model will be described in detail, and the technical solutions in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0019] This utility model provides a novel rotor core lamination stacking and riveting structure through improvements, such as... Figure 1-4As shown in the figure, the rotor includes rotor lamination 1, rotor lamination 2, rotor lamination 3, and rotor shaft 4. Rotor lamination 1 is installed in a closed configuration. The outer edges of each rotor lamination 1 are fixedly connected by connecting pieces 10. Rotor lamination 1 and rotor lamination 2 are installed by riveting, and rotor lamination 2 and rotor lamination 3 are installed by riveting. Rotor lamination 1 is located at the upper and lower end faces of the rotor core. Rotor laminations 1, 2, and 3 are connected to the outer wall of rotor shaft 4 by connecting blocks. 8. Fixed connection: The rotor shaft 4 has a shaft hole 5 inside, and the rotor shaft 4 has protruding teeth on the outside, located inside the rotor laminations 1 and 2. The protruding teeth are evenly distributed with each rotor lamination 1 and 2. Rotor slots 6 are formed between rotor laminations 1, 2, and 3. Magnetic isolation slots 7 and ventilation slots are opened inside rotor laminations 1, 2, and 3. Positioning slots 9 are opened on the outer walls of both sides of rotor laminations 1, 2, and 3. The 10-piece structure, compared to the old-fashioned lamination stacking method, adds a 10-piece lamination to each of the upper and lower end faces of the core that needs to be stacked. The shape and number of other stacking points remain unchanged. Verification has shown that this semi-finished core lamination combination structure has a bonding force approximately 40%-50% higher than the traditional stacking structure. It effectively solves the hidden danger of insufficient bonding force in high-thickness rotor cores due to an excessive number of laminations (while maintaining the same effective number of laminations in the rotor core). While retaining the T-hole stacking structure design and the total rotor thickness, it adds a 10-piece lamination to each of the upper and lower end faces. Each side features an additional connecting plate 10, providing an effective bonding force of 130N. This design effectively addresses the issue of abnormal core deformation during turnover (without changing material costs). Rotor lamination 1 adopts a closed-loop installation, fixing both ends of the rotor core and connecting them via connecting plates 10 to ensure the overall structural tightness and stability. Sub-laminations 2 and 3 are riveted to adjacent and connected rotor laminations 1, forming a closed rotor core structure, improving the rotor's mechanical stability and vibration resistance. The protruding teeth on the outside of the rotor shaft 4 are evenly distributed with rotor laminations 1 and 2, increasing the contact area between the rotor and stator, thus improving electromagnetic performance. The rotor slots 6 between rotor laminations 1, 2, and 3 are used to install the rotor windings, forming an electromagnetic field. The design of the magnetic isolation slots 7 and ventilation slots reduces magnetic field interference, improves electromagnetic conversion efficiency, and enhances heat dissipation through the ventilation slots, ensuring the rotor does not overheat under high loads. The positioning slot 9 is used for precise rotor installation, ensuring the positioning accuracy of the rotor shaft 4 during movement. These structures work together to generate a rotating magnetic field through electromagnetic induction, which in turn interacts with the stator magnetic field to produce mechanical rotational torque, achieving efficient and stable motor operation.

[0020] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0021] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A novel rotor core lamination stacking structure, comprising rotor lamination one (1), rotor lamination two (2), rotor lamination three (3) and rotor shaft (4), characterized in that: The rotor lamination 1 (1) is installed in a closed manner. The outer edges of each rotor lamination 1 (1) are fixedly connected by connecting pieces (10). The rotor lamination 1 (1) and rotor lamination 2 (2) are installed by riveting. The rotor lamination 2 (2) and rotor lamination 3 (3) are installed by riveting. The rotor lamination 1 (1) is located at the upper and lower end faces of the rotor core.

2. The novel rotor core lamination stacking and riveting structure as described in claim 1, characterized in that: The rotor lamination 1 (1), rotor lamination 2 (2) and rotor lamination 3 (3) are fixedly connected to the outer wall of the rotor shaft (4) by a connecting block (8).

3. The novel rotor core lamination stacking and riveting structure as described in claim 1, characterized in that: The rotor shaft (4) has a shaft hole (5) inside, and the rotor shaft (4) has a tooth on the outside, which is located inside the rotor lamination (1) and rotor lamination (2). The tooth is evenly distributed at intervals with each rotor lamination (1) and rotor lamination (2).

4. The novel rotor core lamination stacking and riveting structure as described in claim 1, characterized in that: Rotor slots (6) are formed between rotor lamination 1 (1), rotor lamination 2 (2) and rotor lamination 3 (3). Magnetic isolation slots (7) and ventilation slots are opened inside rotor lamination 1 (1), rotor lamination 2 (2) and rotor lamination 3 (3).

5. The novel rotor core lamination stacking and riveting structure as described in claim 1, characterized in that: Positioning grooves (9) are opened on both sides of the outer walls of rotor lamination 1 (1), rotor lamination 2 (2) and rotor lamination 3 (3).

Images