A segmented composite iron chip
By using a limiting mechanism and dovetail tenon design, the assembly difficulties and noise and vibration problems of the segmented modular iron core are solved, achieving dynamic locking and heat dissipation effects, and improving the motor's operational stability and assembly efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU QIFAN ELECTRIC CO LTD
- Filing Date
- 2025-09-18
- Publication Date
- 2026-07-17
Smart Images
Figure CN224520770U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of iron core technology, and in particular to a segmented combined iron core chip. Background Technology
[0002] The segmented composite lamination design refers to a design where the stator core of a motor or generator is made up of multiple arc-shaped fan-shaped pieces ("lobes") assembled into a complete circular core through a specific combination method. This design contrasts with the traditional integral lamination (a single circular ring) and is mainly used in the manufacture of large and medium-sized motors or generators.
[0003] As shown in the reference case "A Slotted Spliced Core Structure" (publication number CN208904780U), it includes an expansion sleeve, core units, and core connectors connecting the core units. The core units are characterized by being "I"-shaped and formed by stacking multiple laminations. The two protruding parts on the lower side of the "I"-shaped core unit have tenons. The core connectors have tenons protruding on both sides. The tenons and tenons have the same shape. The tenons on the lower side of the "I"-shaped core unit connect with the tenons of the core connectors. Several "I"-shaped core units and core connectors are combined through the tenons and tenons to form a circular stator. The inner hole of the circular stator is interference-fitted with the outer circle of the expansion sleeve. Compared with existing technologies, this utility model has the advantages of an integral insulating frame, adaptability to standard winding machine operations, mass production, good insulation effect, and no risk of damage to the enameled wire during winding.
[0004] However, when using the aforementioned iron core, if the tenon and mortise fit too loosely, the motor will generate noise and vibration; if it is too tight, it cannot be assembled. Utility Model Content
[0005] Therefore, it is necessary to provide a segmented combined iron chip to address the above problems.
[0006] A segmented composite iron chip includes: an iron chip with a tenon groove on its surface and a tenon fixedly connected to its surface; multiple iron chips are stacked and stamped to form an iron core unit; multiple iron core units are combined and spliced to form a circular iron core; a limiting mechanism is provided on the iron core unit; the limiting mechanism includes a limiting groove on the surface of the iron chip, a limiting frame inserted into the limiting groove, a roller slidably connected in the limiting frame, a sliding block corresponding to the roller in the limiting frame, and a through groove corresponding to the sliding block on the surface of the limiting frame.
[0007] In one embodiment, two rollers are provided, the rollers are disposed between the two sliding blocks, and the surface of the sliding blocks is provided with a fitting groove corresponding to the rollers.
[0008] In one embodiment, the inner wall of the limiting frame is provided with a guide groove, and both ends of the roller are provided with protrusions that are adapted to the guide groove. The protrusions are slidably connected in the guide groove, and the extension direction of the guide groove is consistent with the radial direction of the core unit.
[0009] In one embodiment, the tenon is a dovetail tenon with an isosceles trapezoidal cross-section, and the width of the upper base of the trapezoid is smaller than the width of the lower base.
[0010] In one embodiment, the surface of the iron chip is provided with heat dissipation holes that penetrate through the thickness direction of the iron chip, and multiple heat dissipation holes are evenly distributed along the circumference of the iron chip.
[0011] In one embodiment, the number of core units is 4 to 8, and the structures of the multiple core units are completely identical.
[0012] In one embodiment, the inner wall of the fitting groove is provided with an arc-shaped contact surface, the radius of curvature of which is consistent with the outer radius of the roller.
[0013] In one embodiment, a buffer pad, which is a fluororubber pad, is fixedly connected to the end of the sliding block away from the roller.
[0014] Beneficial effects
[0015] 1. In the above-mentioned segmented composite iron chip, the rollers rotate with the iron core and move outward under centrifugal force, squeezing the sliding block to push the tenon and mortise to engage tightly. Compared with the static splicing of existing segmented iron cores, this avoids high-speed loosening. The rollers drive the sliding block to squeeze outward, so that the tenon and mortise always remain in close contact without gaps, improving the fixing effect and avoiding vibration and noise caused by loose fit. This makes assembly easier and avoids noise and vibration.
[0016] 2. The tenons and mortises on the surface of the iron core chip form a hook-like fit, which allows for quick positioning of adjacent iron core units during splicing without the need for repeated calibration of the inner circle. At the same time, the individual iron core units are lightweight, making them easy to assemble manually or mechanically. During equipment maintenance, there is no need to disassemble the entire iron core; only the damaged iron core unit or iron core chip needs to be replaced, reducing downtime for maintenance. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0018] Figure 1 is a schematic diagram of the structure of this utility model;
[0019] Figure 2 is a schematic diagram of the iron core unit installation structure of this utility model;
[0020] Figure 3 is a schematic diagram of the iron chip installation structure of this utility model;
[0021] Figure 4 is a schematic diagram of the structure of this utility model.
[0022] Figure label:
[0023] 100. Iron core unit; 110. Iron chip; 120. Tenon; 130. Mortise and tenon; 140. Winding groove;
[0024] 200, Limiting mechanism; 210, Limiting groove; 220, Limiting frame; 230, Roller; 240, Sliding block. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0026] The following is combined with Figure 1 - Figure 4 This invention describes a segmented, combined iron chip.
[0027] In one embodiment, a segmented composite iron chip includes: an iron chip 110, a tenon groove 130 formed on the surface of the iron chip 110, a tenon 120 fixedly connected to the surface of the iron chip 110, multiple iron chips 110 stacked and stamped to form an iron core unit 100, multiple iron core units 100 combined and spliced to form a circular iron core, and a limiting mechanism 200 provided on the iron core unit 100; the limiting mechanism 200 includes a limiting groove 210 formed on the surface of the iron chip 110, a limiting frame 220 inserted into the limiting groove 210, a roller 230 slidably connected in the limiting frame 220, a sliding block 240 corresponding to the roller 230 provided in the limiting frame 220, and a through groove corresponding to the sliding block 240 formed on the surface of the limiting frame 220. Multiple iron chips 110 are assembled into an iron core unit 100 through a hydraulic lamination process. The pressure during lamination is controlled at 8-10 MPa to ensure tight bonding between the iron chip layers 110, reduce air gaps, and avoid increasing magnetic resistance. Winding grooves 140 are formed on the surface of the iron chip 110 to facilitate coil winding.
[0028] like Figure 2 , Figure 3 and Figure 4 As shown, two rollers 230 are provided, positioned between two sliding blocks 240, and the surface of each sliding block 240 has a corresponding fitting groove. The inner wall of the limiting frame 220 has a guide groove, and both ends of the roller 230 have protrusions adapted to the guide groove. The protrusions are slidably connected within the guide groove, and the extension direction of the guide groove is consistent with the radial direction of the core unit 100. The tenon 120 is a dovetail tenon with an isosceles trapezoidal cross-section, where the width of the upper base is smaller than the width of the lower base. The inner wall of the fitting groove has an arc-shaped contact surface, the radius of curvature of which is consistent with the outer radius of the roller 230. A buffer pad, made of fluororubber, is fixedly connected to the end of the sliding block 240 away from the roller 230.
[0029] In this embodiment, the length of the fitting groove is the same as the length of the roller 230, ensuring maximum contact area. The arc-shaped fit between the fitting groove and the roller 230 achieves uniform force transmission. The protrusions at both ends of the roller 230 are embedded in the guide groove and slide in connection with it. The extension direction of the guide groove is consistent with the radial direction of the core unit 100, ensuring that the roller 230 can only slide radially along the core, avoiding jamming and limiting the roller 230's movement. The tenon 120, after being inserted into the mortise 130, forms a barb constraint, preventing the core unit 100 from detaching radially and improving connection stability. The fluororubber pad reduces noise when the sliding block 240 collides with the inner wall of the iron chip 110, reduces the wear rate of the sliding block 240 and the iron chip 110, and extends service life.
[0030] like Figure 1 As shown, heat dissipation holes are formed on the surface of the iron chip 110, extending through the thickness direction of the iron chip 110, and multiple heat dissipation holes are evenly distributed along the circumference of the iron chip 110. The number of iron core units 100 is 4 to 8, and the structures of multiple iron core units 100 are completely identical.
[0031] In this embodiment, the heat dissipation holes create ventilation channels after the multi-layer iron core chips 110 are stacked, effectively reducing the core's operating temperature and preventing the insulation layer from aging due to high temperatures. Simultaneously, the heat dissipation holes also reduce the core's weight. During assembly, the position of individual core units 100 can be fine-tuned to correct splicing errors, ensuring the roundness of the inner circle of the toroidal core and improving the accuracy of subsequent windings. Compared to traditional integral cores, the arrangement of 4 to 8 core units 100 eliminates the need for large hoisting equipment during assembly, reducing assembly time.
[0032] Working principle: When the annular iron core, composed of segmented composite iron chips 110, is driven by the motor, the entire iron core begins to rotate, and the speed gradually increases to the rated speed. During this process, the centrifugal force generated by the iron core increases with the rotational speed. At this time, the rollers 230 in the limiting mechanism 200, under the action of centrifugal force, overcome their own weight and slight frictional resistance, and move radially outward along the iron core unit 100, with the sliding speed increasing as the rotational speed increases. Since the roller 230 is located between the two sliding blocks 240 and makes arc-shaped contact with the mating groove of the sliding blocks 240, the roller 230 will exert an outward squeezing force on the sliding blocks 240 on both sides when it moves outward. The magnitude of the squeezing force increases with the increase of centrifugal force. Under the action of squeezing force, the sliding block 240 slides outward along the through groove of the limiting frame 220. The fluororubber buffer pad at its end first contacts the inner wall of the iron chip 110. As the sliding block 240 continues to move, the fluororubber buffer pad is slightly compressed. The pressure is further indirectly transmitted to the connection between the tenon 120 and the mortise 130 of the iron core unit 100, so that the mating surfaces of the tenon 120 and the mortise 130 are tightly fitted, and the mating gap gradually decreases until it drops to 0. The higher the speed, the greater the centrifugal force, and the stronger the locking force, the dynamic locking effect is achieved. Even under the condition of speed fluctuation such as motor start-up and shutdown, the iron core unit 100 can be effectively prevented from loosening, ensuring the overall stability of the iron core structure.
[0033] When the iron core rotates, the heat dissipation holes on the surface of the iron core 110 allow air to flow from the inner ring to the outer ring under centrifugal force. As the air flows through the heat dissipation holes, it carries away the eddy current heat generated by the iron core, improving heat exchange efficiency and ensuring that the iron core remains at a suitable operating temperature, thus preventing motor failures caused by insulation aging. The uniform structure of the iron core units 100 ensures a uniform mass distribution throughout the iron core, guaranteeing dynamic balance during rotation and ensuring uniform stress on the entire iron core. This further improves the stability of motor operation and reduces vibration and noise caused by dynamic imbalance.
[0034] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A split core piece, characterized by, include: A metal chip (110) has a tenon groove (130) on its surface and a tenon (120) fixedly connected to its surface. Multiple metal chips (110) are stacked to form a core unit (100). Multiple core units (100) are combined and spliced to form a circular core. A limiting mechanism (200) is provided on the core unit (100). The limiting mechanism (200) includes a limiting groove (210) on the surface of the metal chip (110). A limiting frame (220) is inserted into the limiting groove (210). A roller (230) is slidably connected in the limiting frame (220). A sliding block (240) corresponding to the roller (230) is provided in the limiting frame (220). A through groove corresponding to the sliding block (240) is opened on the surface of the limiting frame (220).
2. The split core module of claim 1, wherein Two rollers (230) are provided, and the rollers (230) are disposed between two sliding blocks (240). The surface of the sliding blocks (240) is provided with a fitting groove corresponding to the rollers (230).
3. The split core module of claim 2, wherein, The inner wall of the limiting frame (220) is provided with a guide groove, and the two ends of the roller (230) are provided with protrusions that are adapted to the guide groove. The protrusions are slidably connected in the guide groove, and the extension direction of the guide groove is consistent with the radial direction of the core unit (100).
4. The split core module of claim 1, wherein, The tenon (120) is a dovetail tenon, the cross-section of which is an isosceles trapezoidal structure, and the width of the upper base of the trapezoid is smaller than the width of the lower base.
5. The split core module of claim 1, wherein, The surface of the iron chip (110) is provided with heat dissipation holes, which penetrate through the thickness direction of the iron chip (110), and multiple heat dissipation holes are evenly distributed along the circumference of the iron chip (110).
6. The split core module of claim 1, wherein, The number of core units (100) is 4 to 8, and the structures of multiple core units (100) are completely identical.
7. The split core module of claim 2, wherein, The inner wall of the fitting groove is provided with an arc-shaped contact surface, and the radius of curvature of the arc-shaped contact surface is consistent with the outer circle radius of the roller (230).
8. The split core module of claim 2, wherein, A buffer pad, which is a fluororubber pad, is fixedly connected to one end of the sliding block (240) away from the roller (230).