Sectional type rotor punching sheet mounting structure

Abstract

The utility model discloses a sectional type rotor punching sheet mounting structure, which relates to the field of motor manufacturing and comprises a punching sheet assembly. An outer key groove is formed in the position, corresponding to the inner key groove of the punching sheet assembly, of the outer ring of the connecting piece, a flat key is installed between the outer key groove and the inner key groove, the inner ring of the connecting piece is connected with the rotating shaft through a key, and torque transmission is achieved; the magnetic steel pressing plates are of a sector-ring-shaped structure, the multiple magnetic steel pressing plates are arranged in an end-to-end aligned mode to form a circular ring structure and cover the surfaces of rotor punching sheets at the top and the bottom of the punching sheet assembly, and a second through hole is formed in the position, corresponding to the first through hole, of each magnetic steel pressing plate, so that the second through hole is aligned with the first through hole, and a screw penetrates into the second through hole; and the magnetic steel pressing plate and the rotor punching sheet are locked. According to the utility model, rotor punching sheet installation difficulty is reduced, rotor punching sheet die manufacturing difficulty and processing cost are reduced, and rotor punching sheet material utilization rate is improved; the material cost and the maintenance cost are reduced, the punching quality inspection difficulty is reduced, and the motor efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing, specifically to a segmented rotor lamination mounting structure. Background Technology

[0002] In existing technologies, rotor laminations are typically punched out as a single sheet and then stacked onto the shaft for assembly. However, as motor size increases, especially when the rotor outer diameter exceeds 1150mm, machining the entire lamination becomes significantly more difficult. This results in substantial waste during lamination processing, low material utilization, large and costly die-casting, inconvenient quality inspection, and the scrapping of the entire lamination if any part is damaged. Alternatively, a single rotor casting method can be used. However, this process lacks slots, requiring tooling for magnet assembly, and the outer ring needs a non-woven tape to secure the magnets. Slotting requires high precision, is complex, and results in higher harmonic losses, negatively impacting overall motor efficiency. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a segmented rotor lamination installation structure, which reduces the difficulty of rotor lamination installation, reduces the difficulty and processing cost of rotor lamination mold manufacturing, improves the utilization rate of rotor lamination materials, reduces material and maintenance costs, reduces the difficulty of lamination quality inspection, and improves motor efficiency.

[0004] The objective of this utility model is achieved through the following technical solution: This segmented rotor lamination mounting structure includes:

[0005] The rotor lamination adopts a fan-shaped ring structure. Several first through holes are opened radially on each rotor lamination. Several bosses are evenly distributed on the outer circle of the rotor lamination. A slot is formed between adjacent bosses. The slot is used to install magnets. An inner keyway is opened on the inner circle of the rotor lamination.

[0006] The lamination unit adopts a ring structure, which is composed of several rotor laminations connected end to end in sequence.

[0007] The first lamination group is formed by several lamination units distributed at equal intervals along the axial direction, so that the first through holes, bosses and inner keyways between adjacent rotor laminations are aligned.

[0008] The second lamination group is formed by a number of lamination units distributed at equal intervals along the axial direction, and the second lamination group is embedded in the interval of the first lamination group to form a lamination assembly. In the lamination assembly, the first through holes and bosses between the upper and lower adjacent rotor laminations are aligned, and the inner keyways between the upper and lower adjacent rotor laminations are staggered.

[0009] The connector has an external keyway on its outer ring corresponding to the internal keyway of the lamination assembly, and a flat key is installed between the external and internal keyways. The inner ring of the connector is connected to the shaft via a key to achieve torque transmission; and

[0010] The magnet pressure plate adopts a fan-shaped ring structure. Several magnet pressure plates are arranged end to end in a ring structure and cover the rotor lamination surface at the top and bottom of the lamination assembly. Each magnet pressure plate has a second through hole at the position corresponding to the first through hole, so that the second through hole is aligned with the first through hole, allowing the screw to pass through and lock the magnet pressure plate and the rotor lamination.

[0011] As a further technical solution, each rotor lamination has inclined surfaces on both sides of its inner circle, so that when two adjacent rotor laminations are connected, a clearance space is formed at the inclined surfaces to avoid the inner keyway on the upper and / or lower rotor laminations.

[0012] As a further technical solution, a dovetail groove is provided on one side of each rotor lamination to cooperate with a dovetail protrusion provided on the other side of the rotor lamination to form a detachable connection.

[0013] As a further technical solution, the cross-section of the boss adopts a trapezoidal structure that is wider on the outside and narrower on the inside, so that the slot is narrower on the outside and wider on the inside.

[0014] As a further technical solution, the bosses are evenly distributed along the outer circumferential direction of the lamination unit, and the inner keyways are evenly distributed along the inner circumferential direction of the lamination unit.

[0015] As a further technical solution, the inner radius of the magnet pressure plate is larger than the inner radius of the rotor lamination, and the outer radius of the magnet pressure plate is smaller than the outer radius of the rotor lamination plus the boss, so that the outer circle of the boss protrudes from the magnet pressure plate.

[0016] As a further technical solution, a shaft connection keyway is provided on the inner ring of the connector for connecting the rotating shaft.

[0017] As a further technical solution, a fixing hole is opened on the inner ring end face of the connector. After the shaft is clamped to the connector by the clamp, it is locked through the fixing hole.

[0018] As a further technical solution, the inner and outer rings of the connector are connected by connecting ribs.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. By adopting fan-shaped (fan-ring) rotor laminations, material costs are reduced, waste of scrap materials is reduced, and the difficulty and cost of mold processing are reduced; silicon steel sheet rolls can be used more efficiently, cutting waste is reduced, mold size is reduced, large equipment is avoided for processing, processing difficulty and processing costs are reduced, and the smaller size reduces material costs;

[0021] 2. The laminations in the upper and lower layers are stacked in a staggered manner to ensure the coaxiality of the laminations, improve the rotor strength, reduce eddy current losses, and reduce vibration and noise. The staggered stacking of laminations prevents some laminations from shifting, and the force is evenly distributed during rotation. The staggered arrangement disrupts the continuity of the magnetic circuit between the laminations, suppresses high-frequency eddy currents, disperses the joint positions, and avoids the concentration of electromagnetic forces.

[0022] 3. The boss on the outer circle of the lamination adopts an inverted trapezoidal structure, which can fix the magnet and eliminate the need for a weft-free belt. The inverted trapezoidal structure can firmly hold the magnet and limit its radial displacement, eliminating the need for a weft-free belt on the outer circle to fix the magnet. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the structure of this utility model after concealing the rotating shaft and connecting parts.

[0025] Figure 3 This is a schematic diagram of the connecting component in this utility model.

[0026] Figure 4 This is a schematic diagram of the rotor lamination structure in this utility model.

[0027] Figure 5 This is a schematic diagram of the upper and lower layers of rotor lamination assembly in this utility model.

[0028] Figure 6 This is a schematic diagram of the structure of the magnetic steel pressure plate in this utility model.

[0029] Figure 7 This is a schematic diagram of the structure of the first lamination group in this utility model.

[0030] Figure 8 This is a schematic diagram of the structure of the first and second lamination groups after assembly in this utility model.

[0031] Figure 9 for Figure 8 A magnified view of a portion of region A in the middle.

[0032] Figure 10 for Figure 8 A magnified view of a portion of region B in the middle.

[0033] Explanation of reference numerals in the attached drawings: 1. Rotor lamination; 11. Dovetail groove; 12. Dovetail protrusion; 13. First through hole; 14. Boss; 15. Slot; 16. Inner keyway; 17. Bevel; 2. Magnet pressure plate; 21. Second through hole; 3. Connector; 3. Inner ring; 31. Shaft connection keyway; 311. Fixing hole; 312. Outer ring; 32. Outer keyway; 321. Connecting rib; 33. Rotating shaft; 4. Screw; 5. Magnet; 6. Clamp; 7. Flat key; 8. Detailed Implementation

[0034] The present invention will now be described in detail with reference to the accompanying drawings:

[0035] Example: As attached Figures 1-10 As shown, this segmented rotor lamination mounting structure includes rotor lamination 1, dovetail groove 11, dovetail protrusion 12, first through hole 13, boss 14, slot 15, inner keyway 16, inclined surface 17, magnet pressure plate 2, second through hole 21, connector 3, inner ring 31, shaft connection keyway 311, fixing hole 312, outer ring 32, outer keyway 321, connecting rib 33, rotating shaft 4, screw 5, magnet 6, clamp 7, and flat key 8.

[0036] Reference Appendix Figure 4 The rotor lamination 1 adopts a fan-shaped annular structure. Four first through holes 13 (four in this embodiment, but other numbers are also possible) are radially through-holes on each rotor lamination 1. Six bosses 14 (six in this embodiment, but other numbers are also possible) are evenly distributed on the outer circumference of the rotor lamination 1. A slot 15 is formed between adjacent bosses 14, and a magnet 6 is embedded in the slot 15. Simultaneously, an inner keyway 16 is formed on the inner circumference of the rotor lamination 1. Preferably, a dovetail groove 11 is provided on the left side of each rotor lamination 1, and a dovetail protrusion 12 is provided on the right side of each rotor lamination 1. The dovetail protrusion 12 can form a slot-type engagement with the dovetail groove 11, forming a detachable connection.

[0037] like Figure 5 , 7 As shown in Figure 8, ten rotor laminations 1 are connected end-to-end to form a ring-shaped lamination unit. The number of rotor laminations 1 can be adjusted according to the actual dimensions. Figure 7 As shown, several lamination units are evenly spaced along the axial direction to form a first lamination group. In the first lamination group, the first through holes 13, bosses 14, and inner keyways 16 between any two adjacent rotor laminations 1 are aligned. (See attached diagram) Figure 8 Several lamination units are evenly spaced along the axial direction to form a second lamination group. The number of lamination units in the first lamination group and the second lamination group is equal, and the second lamination group is embedded one-to-one within the intervals of the first lamination group to form a lamination assembly (the intervals between each lamination unit in the first and second lamination groups are equal, and are all equal to the thickness of the rotor lamination 1). After the lamination assembly is assembled, the first through holes 13 and bosses 14 between adjacent upper and lower rotor laminations 1 (i.e., between the first lamination group and the second lamination group) are aligned, and the inner keyways 16 between adjacent upper and lower rotor laminations 1 are staggered, such as... Figure 8 , 9 As shown in Figures 1 and 10, the inner keyways 16 located on the same axis are grouped together. The first and second lamination groups each have ten groups of inner keyways 16, for a total of twenty groups of interleaved inner keyways 16.

[0038] Further, see attached document. Figure 4 , 5 9. Each rotor lamination 1 has a bevel 17 on both sides of its inner circle, creating a clearance space at the bevel 17 when two adjacent rotor laminations 1 are connected. This clearance space allows for clearance of the inner keyways 16 on the upper and / or lower rotor laminations 1, facilitating the staggered distribution of the inner keyways 16 between the first and second lamination groups. Preferably, the boss 14 has a trapezoidal cross-section that is wider on the outside and narrower on the inside, making the slot 15 narrower on the outside and wider on the inside. This prevents the magnet 6 from easily falling out after being embedded in the slot 15, secures the magnet, restricts its radial displacement, and eliminates the need for a weft-free outer ring to fix the magnet. The bosses 14 are evenly distributed along the outer circumference of each lamination unit, and the inner keyways 16 are evenly distributed along the inner circumference of each lamination unit.

[0039] like Figure 1 , 3 As shown, the connector 3 includes an inner ring 31, an outer ring 32, and a connecting rib 33 connecting the inner ring 31 and the outer ring 32. An outer keyway 321 (there are twenty outer keyways 321, matching the number of sets of inner keyways 16) is formed on the outer ring 32 of the connector 3 at a position corresponding to the inner keyway 16 of the lamination assembly. A flat key 8 is installed between the outer keyway 321 and the inner keyway 16. Simultaneously, a shaft connection keyway 311 is formed on the inner ring 31 of the connector 3, through which a rotating shaft 4 is installed to achieve torque transmission. Preferably, a fixing hole 312 is formed on the end face of the inner ring 31 of the connector 3. After the rotating shaft 4 is clamped to the connector 3 by a clamp 7, it is locked through the fixing hole 312.

[0040] Reference Appendix Figure 2 , 6 The magnet pressure plate 2 adopts a fan-shaped ring structure. Several magnet pressure plates 2 are arranged end-to-end in a circular structure and cover the rotor lamination 1 surface at the top and bottom of the lamination assembly. Each magnet pressure plate 2 has a second through hole 21 at a position corresponding to the first through hole 13, so that the second through hole 21 is aligned with the first through hole 13, allowing the screw 5 to pass through, thereby locking the magnet pressure plate 2 to the rotor lamination 1. Preferably, the inner radius of the magnet pressure plate 2 is larger than the inner radius of the rotor lamination 1, and the outer radius of the magnet pressure plate 2 is smaller than the radius of the outer circle of the rotor lamination 1 plus the boss 14, so that the outer circle of the boss 14 can be exposed on the magnet pressure plate 2.

[0041] The manufacturing and assembly process of this utility model:

[0042] 1. Design rotor lamination 1. The lamination is fan-shaped with dovetail grooves at both ends. A hole (first through hole 13) is drilled at a certain angle in the lamination. Four holes are drilled in one lamination. Inverted trapezoidal bosses 14 are made at a certain angle on the outer circle of the lamination, and keyways (inner keyways 16) are made on the inner circle.

[0043] 2. Design a fan-shaped magnetic steel pressure plate 2. Four holes (second through holes 21) are evenly drilled on a pitch circle in the pressure plate. The inner circle radius is larger than the inner circle of the stamping, and the outer circle is smaller than the outer circle of the stamping plus the height of the trapezoidal boss.

[0044] 3. Design a connecting part, namely connector 3, between the shaft and the rotor lamination. The outer ring 32 of connector 3 should have 20 external keyways 321 evenly opened at the mating point with the rotor lamination 1, and two shaft connecting keyways 311 should be made symmetrically at the connection point with the rotating shaft 4.

[0045] 4. Press the connector 3 into the rotating shaft 4, and then place it vertically on the tooling.

[0046] 5. Align the ends of the magnet plate 2 (to form a ring) and place it evenly on the fixture along the outer ring 32 of the connector 3. Then insert the screw 5 into the second through hole 21 of the magnet plate 2.

[0047] 6. Align the first through hole 13 on the rotor lamination 1 with the four screws 5 and offset it from the magnet plate 2. Align the two first through holes 13 of the first lamination with the two second through holes 21 of the first magnet plate 2. Align the other two first through holes 13 of the first lamination with the two second through holes 21 of the second magnet plate 2. Align the second lamination with the four screws 5 and align the dovetail grooves (dovetail groove 11, dovetail protrusion 12) of the two laminations with their ends aligned on the magnet plate 2. The first layer of rotor laminations is evenly assembled on the magnet plate 2 in this way.

[0048] 7. The first lamination of the second layer (i.e., the second lamination group) is placed with two holes offset from the first lamination of the first layer (i.e., the first lamination group). The second lamination of the second layer is placed with its dovetail grooves aligned end-to-end with the first lamination of the second layer. The rotor laminations 1 of the second layer are assembled evenly in this manner. Subsequent laminations in each layer are assembled with two holes offset from the laminations of the adjacent layer (first through holes 13), but the first through holes 13 are still aligned. Figure 7 , 8 As shown.

[0049] 8. After the rotor lamination 1 is assembled, insert the flat key 8 into the keyway where the outer ring 32 of the connector 3 matches the inner circle of the lamination (i.e., between the outer keyway 321 and the inner keyway 16). Then, apply glue evenly to the outer ring 32 of the connector 3, and then insert the magnet 6 into the rotor lamination 1 from the slot 15 between the two bosses 14 on the outer circle of the lamination.

[0050] 9. After assembling the magnet 6, align the magnet pressure plate 2 with the punch plate by two offset holes and align the screw 5, then tighten it with the nut.

[0051] In actual production, taking the SAVDD-720-90-20 motor (low-speed, high-torque motor) as an example, the inner diameter of the motor's rotor component is 1048mm, and it is made into segmented rotor laminations, with a total of 10 laminations per revolution.

[0052] It is understood that, for those skilled in the art, any equivalent substitutions or modifications to the technical solutions and inventive concepts of this utility model should fall within the protection scope of the appended claims.

Claims

1. A segmented rotor lamination mounting structure, characterized in that, include: The rotor lamination (1) adopts a fan-shaped ring structure. Several first through holes (13) are opened radially on each rotor lamination (1). Several bosses (14) are evenly distributed on the outer circle of the rotor lamination (1). A slot (15) is formed between adjacent bosses (14). The slot (15) is used to install magnets (6). An inner keyway (16) is opened on the inner circle of the rotor lamination (1). The lamination unit adopts a ring structure and is composed of several rotor laminations (1) connected end to end in sequence; The first lamination group is formed by several lamination units distributed at equal intervals along the axial direction, so that the first through holes (13), bosses (14) and inner keyways (16) between adjacent rotor laminations (1) are aligned. The second lamination group is formed by a number of lamination units distributed at equal intervals along the axial direction, and the second lamination group is embedded in the interval of the first lamination group to form a lamination assembly. In the lamination assembly, the first through holes (13) and bosses (14) between the upper and lower adjacent rotor laminations (1) are aligned, and the inner keyways (16) between the upper and lower adjacent rotor laminations (1) are staggered. The connector (3) has an outer keyway (321) on its outer ring (32) corresponding to the inner keyway (16) of the lamination assembly, and a flat key (8) is installed between the outer keyway (321) and the inner keyway (16). The inner ring (31) of the connector (3) is connected to the rotating shaft (4) by a key to achieve torque transmission; and The magnet plate (2) adopts a fan-shaped ring structure. Several magnet plates (2) are arranged in a ring structure with their ends aligned, and cover the surface of the rotor lamination (1) at the top and bottom of the lamination assembly. A second through hole (21) is opened at the position corresponding to the first through hole (13) on each magnet plate (2), so that the second through hole (21) is aligned with the first through hole (13) for the screw (5) to pass through and lock the magnet plate (2) and the rotor lamination (1).

2. The segmented rotor lamination mounting structure according to claim 1, characterized in that: Each rotor lamination (1) has inclined surfaces (17) on both sides of its inner circle, so that when two adjacent rotor laminations (1) are connected, a clearance space is formed at the inclined surface (17) to avoid the inner keyway (16) on the upper and / or lower rotor laminations (1).

3. The segmented rotor lamination mounting structure according to claim 1, characterized in that: Each rotor lamination (1) has a dovetail groove (11) on one side to cooperate with the dovetail protrusion (12) on the other side of the rotor lamination (1) to form a detachable connection.

4. The segmented rotor lamination mounting structure according to claim 1, characterized in that: The cross-section of the boss (14) adopts a trapezoidal structure that is wider on the outside and narrower on the inside, so that the slot (15) is narrower on the outside and wider on the inside.

5. The segmented rotor lamination mounting structure according to claim 1, characterized in that: The bosses (14) are evenly distributed along the outer circumferential direction of the lamination unit, and the inner keyways (16) are evenly distributed along the inner circumferential direction of the lamination unit.

6. The segmented rotor lamination mounting structure according to claim 1, characterized in that: The inner radius of the magnet plate (2) is greater than the inner radius of the rotor lamination (1), and the outer radius of the magnet plate (2) is less than the radius of the outer circle of the rotor lamination (1) plus the boss (14), so that the outer circle of the boss (14) protrudes from the magnet plate (2).

7. The segmented rotor lamination mounting structure according to claim 1, characterized in that: The inner ring (31) of the connector (3) has a shaft connection keyway (311) for connecting the rotating shaft (4).

8. The segmented rotor lamination mounting structure according to claim 1, characterized in that: A fixing hole (312) is provided on the end face of the inner ring (31) of the connector (3). After the rotating shaft (4) is clamped to the connector (3) by the clamp (7), it is locked by the fixing hole (312).

9. The segmented rotor lamination mounting structure according to claim 1, characterized in that: The inner ring (31) and outer ring (32) of the connector (3) are connected by a connecting rib (33).

Images