Rotor core lamination pressing tool

Abstract

The utility model relates to a rotor core lamination tool, including base, inner core, lower pressing plate, outer hoop, slot plate, upper pressing plate and top plate, the inner core vertical welding is in the center of base, the lower pressing plate is set up on the inner core, the lower pressing plate with base abuts, the lower pressing plate is used for supporting the rotor core of lamination to wait, the inner side of outer hoop with rotor core outside abuts, the slot plate is worn in the magnet steel slot of rotor core, the top plate is pressed in the upper pressing plate, the utility model has the advantages of realizing high-precision size control, avoiding rotor core magnet steel slot deformation, effectively improving production consistency.

Description

Technical Field

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

[0002] Traditional rotor core stacking fixtures typically employ an inner core positioning structure, using upper and lower pressure plates to press the stacked core laminations together. However, relying solely on inner core positioning cannot effectively constrain the outer diameter of the core, leading to out-of-tolerance outer circle dimensions and affecting the assembly clearance between the rotor and stator. Furthermore, there is a lack of active constraint on the rotor core slot shape, making it easy for the magnet slots to deform and misalign after stacking, thus affecting the magnet assembly accuracy and the electromagnetic performance of the motor. Utility Model Content

[0003] The purpose of this invention is to provide a rotor core stacking fixture that can achieve high-precision dimensional control, avoid deformation of the rotor core magnet slots, and effectively improve production consistency.

[0004] A rotor core stacking fixture includes a base, an inner core, a lower pressure plate, an outer hoop, a slotted plate, an upper pressure plate, and a top plate. The inner core is vertically welded to the center of the base. The lower pressure plate is sleeved on the inner core and abuts against the base. The lower pressure plate is used to support the rotor core to be stacked. The inner side of the outer hoop abuts against the outer side of the rotor core. The slotted plate passes through the magnet slot of the rotor core. The top plate presses against the upper pressure plate.

[0005] In the above scheme, the inner core is welded and fixed to the center of the base to ensure the strength and verticality of the inner core. The inner core serves as the reference axis for the inner diameter of the rotor core, ensuring the coaxiality of the stacked rotor cores. The inner side of the outer hoop abuts against the outer side of the rotor core. The outer hoop and the inner core cooperate to ensure the dimensions of the inner and outer diameters of the rotor core. The slotted plate passes through the magnet slots of the rotor core. This ensures the dimensions and stability of the magnet slots of the rotor core when pressing the rotor core, and avoids deformation of the magnet slots. The upper pressure plate and the top plate can apply a uniform axial load to the rotor core. Together with the support surface of the lower pressure plate, it ensures that the stacked rotor cores are tightly fitted and symmetrically stressed, preventing the rotor core from tilting, thereby improving the consistency during production.

[0006] Furthermore, the lower pressure plate has a groove on its side, and the outer hoop is engaged in the groove.

[0007] In the above scheme, the outer hoop is snapped into the groove of the lower pressure plate, which realizes the precise positioning of the outer hoop and ensures the concentricity of the inner core and the outer hoop, thus ensuring precise alignment during the rotor core stacking process.

[0008] Furthermore, the lower pressure plate is provided with a first groove-shaped hole at the position corresponding to the groove-shaped plate.

[0009] In the above scheme, the precise matching between the first slotted hole and the slotted plate not only achieves reliable positioning of the slotted plate during the stacking process, but also ensures the dimensional stability of the magnetic steel slot throughout the entire stacking process. This design allows the slotted plate to be naturally embedded into the lower pressure plate, achieving the ideal positioning effect without additional adjustment, and greatly improving assembly efficiency.

[0010] Furthermore, the upper pressure plate is provided with a second groove-shaped hole at the position corresponding to the groove-shaped plate.

[0011] In the above scheme, the second slotted hole and the first slotted hole of the lower pressure plate form a corresponding positioning structure, which provides double positioning protection for the slotted plate during the stacking process and significantly improves the positioning reliability. This structure ensures that the slotted plate remains vertically stable when subjected to clamping force, effectively preventing the deflection phenomenon that may occur in traditional single-point positioning. During the stacking of the rotor core, the slotted plate will not interfere with the upper and lower pressure plates.

[0012] Furthermore, the top plate has a through hole corresponding to the position of the inner core.

[0013] In the above scheme, the top plate has through holes corresponding to the inner core to avoid pressing the inner core during stacking, ensuring that the clamping force is fully applied to the rotor core to be stacked. The top plate works with an external press to apply pressure to the upper pressure plate. The structure is simple and easy to process and install.

[0014] Furthermore, the concentricity between the outer hoop and the inner core does not exceed 0.1 mm.

[0015] In the above scheme, the high-precision concentric fit enables the rotor core to obtain uniform radial constraint during the stacking process, effectively eliminating the dimensional wave caused by positioning deviation in the traditional process. In actual production, this strict concentricity requirement enables the rotor core laminations to be precisely aligned along the ideal axis, avoiding quality defects caused by eccentricity.

[0016] This utility model discloses a rotor core stacking fixture, which has the beneficial effects of achieving high-precision dimensional control, avoiding deformation of the rotor core magnet slots, and effectively improving production quality. The inner core is welded and fixed to the center of the base to ensure its strength and verticality. The inner core serves as the reference axis for the inner diameter of the rotor core, ensuring the coaxiality of the stacked rotor cores. The inner side of the outer hoop abuts against the outer side of the rotor core. The outer hoop and the inner core cooperate to ensure the dimensions of the inner and outer diameters of the rotor core. The slotted plate passes through the magnet slots of the rotor core, thus ensuring the dimensions and stability of the magnet slots when pressing the rotor core, preventing deformation of the magnet slots. The upper pressure plate and the top plate can apply a uniform axial load to the rotor core, and together with the support surface of the lower pressure plate, ensure that the stacked rotor cores are tightly fitted and symmetrically stressed, preventing the rotor core from tilting, thereby improving the consistency during production. Attached Figure Description

[0017] Figure 1 This is a cross-sectional schematic diagram of a rotor core mounted on a stacking fixture, according to one embodiment.

[0018] Figure 2 This is a schematic cross-sectional view of a stacking fixture for a rotorless iron core according to one embodiment.

[0019] The following are the symbols and their meanings: 1. Base; 2. Inner core; 3. Lower pressure plate; 31. Groove; 32. First slotted hole; 4. Outer hoop; 5. Slotted plate; 6. Upper pressure plate; 61. Second slotted hole; 7. Top plate; 71. Through hole; 8. Rotor core. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0021] like Figure 1 and Figure 2 As shown in a preferred embodiment, a rotor core stacking fixture of the present invention includes a base 1, an inner core 2, a lower pressure plate 3, an outer hoop 4, a grooved plate 5, an upper pressure plate 6, and a top plate 7. The inner core 2 is vertically welded to the center of the base 1. The lower pressure plate 3 is sleeved on the inner core 2 and abuts against the base 1. The lower pressure plate 3 is used to support the rotor core 8 to be stacked. The inner side of the outer hoop 4 abuts against the outer side of the rotor core 8. The grooved plate 5 passes through the magnet groove of the rotor core 8. The top plate 7 is pressed on the upper pressure plate 6. The inner core 2 is welded and fixed to the center of the base 1 to ensure the strength and verticality of the inner core 2. The inner core 2 serves as the reference axis for the inner diameter of the rotor core 8, ensuring the coaxiality of the stacked rotor core 8. The inner side of the outer hoop 4 abuts against the outer side of the rotor core 8. The outer hoop 4 and the inner core 2 cooperate to ensure the dimensions of the inner and outer diameters of the rotor core 8. The slotted plate 5 passes through the magnet slot of the rotor core 8, thus ensuring the dimensions and stability of the magnet slot of the rotor core 8 when pressing the rotor core 8, and avoiding deformation of the magnet slot. The upper pressure plate 6 and the top plate 7 can apply a uniform axial load to the rotor core 8. Together with the support surface of the lower pressure plate 3, they ensure that the stacked rotor core 8 fits tightly and is subjected to symmetrical force, preventing the rotor core 8 from tilting, thereby improving the consistency during production.

[0022] like Figure 1 and Figure 2 As shown, in some embodiments, the lower pressure plate 3 has a groove 31 on its side, and the outer hoop 4 is engaged in the groove 31. The engagement of the outer hoop 4 in the groove 31 of the lower pressure plate 3 achieves precise positioning of the outer hoop 4, while ensuring the concentricity of the inner core 2 and the outer hoop 4, thus ensuring precise alignment during the stacking process of the rotor core 8.

[0023] like Figure 1 and Figure 2As shown, in some embodiments, the lower pressure plate 3 is provided with a first slotted hole 32 at the position corresponding to the slotted plate 5. Through the precise cooperation between the first slotted hole 32 and the slotted plate 5, not only is the reliable positioning of the slotted plate 5 achieved during the stacking process, but the dimensional stability of the magnetic steel channel is also ensured throughout the entire stacking process. This design allows the slotted plate 5 to be naturally embedded into the lower pressure plate 3, achieving the ideal positioning effect without additional adjustments, and greatly improving assembly efficiency.

[0024] like Figure 1 and Figure 2 As shown, in some embodiments, the upper pressure plate 6 has a second slotted hole 61 at the position corresponding to the slotted plate 5. The second slotted hole 61 and the first slotted hole 32 of the lower pressure plate 3 form a corresponding positioning structure, which provides double positioning protection for the slotted plate 5 during the stacking process, significantly improving the positioning reliability. This structure ensures that the slotted plate 5 remains vertically stable when subjected to clamping force, effectively preventing the deflection phenomenon that may occur in traditional single-point positioning. During the stacking of the rotor core 8, the slotted plate 5 will not interfere with the upper pressure plate 6 and the lower pressure plate 3.

[0025] like Figure 1 and Figure 2 As shown, in some embodiments, the top plate 7 has a through hole 71 at the position corresponding to the inner core 2. The through hole 71 on the top plate 7 at the position corresponding to the inner core 2 is to prevent the inner core 2 from being pressed during stacking, and to ensure that the clamping force is fully applied to the rotor core 8 to be stacked. The top plate 7 cooperates with the external press to apply pressure to the upper pressure plate 6. The structure is simple and convenient for processing and installation.

[0026] like Figure 1 and Figure 2 As shown, in some embodiments, the concentricity between the outer hoop 4 and the inner core 2 does not exceed 0.1 mm. The high-precision concentric fit enables the rotor core 8 to obtain uniform radial constraint during the stacking process, effectively eliminating the dimensional wave caused by positioning deviation in traditional processes. In actual production, this strict concentricity requirement enables the rotor core 8 laminations to be precisely aligned along the ideal axis, avoiding quality defects caused by eccentricity.

[0027] The present invention relates to the working principle and process of a rotor core stacking fixture. The inner core 2 is welded to the base 1 to form a vertical reference axis, ensuring the coaxiality of the inner hole of the rotor core 8. The outer hoop 4 and the inner core 2 form an "inner and outer double positioning" structure to ensure the inner and outer diameter dimensions of the rotor core 8. The slotted plate 5 penetrates the magnet slot of the rotor core 8 to ensure the shape and size of the magnet slot. The upper pressure plate 6 and the top plate 7 are combined to achieve axial pressure equalization loading, eliminating the tilting of the rotor core 8 laminations caused by eccentric load.

[0028] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying 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, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they 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 according to the specific circumstances.

[0031] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A rotor core stacking fixture, characterized in that, The device includes a base, an inner core, a lower pressure plate, an outer hoop, a grooved plate, an upper pressure plate, and a top plate. The inner core is vertically welded to the center of the base. The lower pressure plate is sleeved on the inner core and abuts against the base. The lower pressure plate is used to support the rotor core to be stacked. The inner side of the outer hoop abuts against the outer side of the rotor core. The grooved plate passes through the magnet slot of the rotor core. The top plate presses against the upper pressure plate.

2. The rotor core stacking fixture according to claim 1, characterized in that, The lower pressure plate has a groove on its side, and the outer hoop is engaged in the groove.

3. The rotor core stacking fixture according to claim 1, characterized in that, The lower pressure plate has a first groove-shaped hole at the position corresponding to the groove-shaped plate.

4. The rotor core stacking fixture according to claim 1, characterized in that, The upper pressure plate has a second groove-shaped hole at the position corresponding to the groove-shaped plate.

5. The rotor core stacking fixture according to claim 1, characterized in that, The top plate has a through hole corresponding to the position of the inner core.

6. The rotor core stacking fixture according to claim 1, characterized in that, The concentricity between the outer hoop and the inner core shall not exceed 0.1 mm.

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