A motor stator punching sheet stacking and expanding tightening device

Abstract

The present invention discloses a motor stator punching sheet stacking and expanding tightening device, which includes a motor stator core stacking die, a key, an expanding die bolt, a closing die bolt, an upper pressing plate, and a lower pressing plate; the motor stator core stacking die is installed on the lower pressing plate; the upper pressing plate is placed in the motor stator core stacking die; there is a concave keyway in the center of the motor stator core stacking die; the key is placed in the concave keyway; there are two fixing iron sheets in the center of the upper end of the motor stator core stacking die, and there are circular perforations on the fixing iron sheets; the inside of the circular perforations is in a spiral pattern, and the expanding die bolt and the closing die bolt are installed on the fixing iron sheets. The motor stator punching sheet stacking and expanding tightening device provided by the present invention can reduce the cost of the motor stator stacking process, ensure the stacking quality. The stator punching sheet can fully meet the technical requirements, reduce the iron loss of the motor, and improve the performance parameters of the motor. The manufacturing difficulty of the stacking process is reduced, and the stacking efficiency of the stator punching sheet is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor punching sheet lamination, and specifically to a motor stator punching sheet lamination and expansion tightening device. Background Art

[0002] At present, during the stator lamination process of a motor, in order to ensure the non-uniformity of the motor iron core, it is necessary to increase the tolerance fit between the lamination die and the product (the clearance between the inner diameter of the punching sheet and the outer diameter of the die should be as small as possible), but this increases the difficulty of demolding, and even makes demolding impossible. In order to reduce the demolding difficulty, the tolerance fit between the lamination die and the punching sheet is reduced (the clearance between the inner diameter of the punching sheet and the outer diameter of the die should be as large as possible), but the ideal non-uniformity of the motor iron core cannot be guaranteed. After the motor punching sheets are laminated, it is often necessary to perform secondary machining on the outer circle of the stator iron core to ensure the surface flatness. The secondary machining is likely to cause damage to the motor punching sheets and increase the motor loss. Summary of the Invention

[0003] To solve the above problems, the present invention provides a motor stator punching sheet lamination and expansion tightening device, including a motor stator iron core lamination die, a key, an expansion die bolt, a mold closing bolt, an upper pressure plate, and a lower pressure plate.

[0004] The motor stator iron core lamination die is installed on the lower pressure plate; the upper pressure plate is placed in the motor stator iron core lamination die; there is a concave keyway in the center of the motor stator iron core lamination die; the key is placed in the concave keyway; there are two fixed iron sheets in the center of the upper end of the motor stator iron core lamination die, and there are circular perforations on the fixed iron sheets; the interior of the circular perforations is threaded, and the expansion die bolt and the mold closing bolt are installed on the fixed iron sheets.

[0005] Further, it also includes a motor stator punching sheet and a motor stator retaining ring, and the motor stator punching sheet and the motor stator retaining ring are placed in the motor stator iron core lamination die.

[0006] Further, the models of the expansion die bolt and the mold closing bolt are both M20x150.

[0007] Further, it also includes a motor stator pull rod, and the motor stator pull rod is used to fix and tighten the motor stator punching sheet and the motor stator retaining ring.

[0008] Further, the outer diameter dimension of the motor stator iron core lamination die and the inner diameter tolerance of the motor stator punching sheet are in a transition fit.

[0009] The present invention provides a motor stator punching sheet lamination and expansion tightening device, which has the following beneficial effects:

[0010] The present invention solves the problem that it is difficult to control the non-uniformity during the lamination of the motor stator punching sheet, eliminates the adverse effects of the surface of the reprocessed punching sheet on the motor stator, and at the same time solves the problem of difficult demolding, reducing the cost of manufacturing the laminated stator punching sheet. The motor stator punching sheet lamination expansion and tightening device provided by the present invention can reduce the cost of the motor stator lamination process and ensure the lamination quality. It enables the stator punching sheet to fully meet the technical requirements, reduces the iron loss of the motor, and improves the performance parameters of the motor. It reduces the manufacturing difficulty of the lamination process and improves the lamination efficiency of the stator punching sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0012] Figure 1 It is a schematic structural diagram of the device provided by the present invention.

[0013] In the figure, 1 is the lamination die of the motor stator core; 2 is the key; 3 is the die expansion bolt; 4 is the die closing bolt; 5 is the upper pressure plate; 6 is the lower pressure plate; 7 is the motor stator punching sheet; 8 is the motor stator pull rod; 9 is the motor stator retaining ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0015] The following will provide a detailed description of the implementation method of the present invention in conjunction with the drawings. What is described is only part of the embodiments, not all embodiments. For the purpose of clarity, the representations and descriptions unrelated to the present invention are omitted in the drawings and the description.

[0016] In order to have a clearer understanding of the technical features, objectives, and beneficial effects of the present invention, the following will provide a detailed description of the technical solutions of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all embodiments, and should not be construed as limiting the scope of the present invention that can be implemented. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0017] As Figure 1 shown, the present invention provides a motor stator punching sheet lamination expansion and tightening device, including a motor stator core lamination die 1, a key 2, a die expansion bolt 3, a die closing bolt 4, an upper pressure plate 5, and a lower pressure plate 6.

[0018] The motor stator core stacking die 1 is installed on the lower pressure plate 6; the upper pressure plate 5 is placed in the motor stator core stacking die 1; there is a concave keyway in the center of the motor stator core stacking die 1; the key 2 is placed in the concave keyway; there are two fixing iron sheets in the center of the upper end of the motor stator core stacking die 1, and there are circular perforations on the fixing iron sheets; the inside of the circular perforations is in a spiral pattern, and the mold expanding bolt 3 and the mold closing bolt 4 are installed on the fixing iron sheets. Among them, the models of the mold expanding bolt 3 and the mold closing bolt 4 are both M20x150.

[0019] It also includes a motor stator punching sheet 7, a motor stator pull rod 8 and a motor stator pressure ring 9. The motor stator punching sheet 7 and the motor stator pressure ring 9 are placed in the motor stator core stacking die 1; the motor stator pull rod 8 is used to fixedly tension the motor stator punching sheet 7 and the motor stator pressure ring 9.

[0020] The outer diameter dimension of the motor stator core stacking die 1 and the inner diameter tolerance of the motor stator punching sheet 7 are in an interference fit.

[0021] The working principle of a motor stator punching sheet stacking and expanding and tightening device provided by the present invention is specifically as follows: Install the motor stator core stacking die 1 on the lower pressure plate 6, then evenly stack the motor stator punching sheets 7 on the motor stator core stacking die 1. After the motor stator punching sheets 7 are stacked, tighten the mold expanding bolt 3 to push open the motor stator core stacking die 1, and place the key 2 in the keyway of the motor stator core stacking die 1. Then loosen the mold expanding bolt 3 to evenly expand the stator core. Then place the upper pressure plate 5 and use a hydraulic press to press and tighten the motor stator punching sheets. Then use the motor stator pull rod 8 to fix the iron core, and the two ends of the motor stator pull rod 8 are fully welded and fixed to the motor stator pressure ring 9. After welding is completed, tighten the mold expanding bolt 4 to push open the motor stator core stacking die 1, take out the key 2, then loosen the mold expanding bolt 3 and tighten the mold closing bolt 4 to contract the motor stator core stacking die 1, and lift out the motor stator core.

[0022] The invention of the motor stator core stacking die adopts a semi-split structure. After the blank of the stacking die is welded, the welded stacking die is processed in half (without complete splitting, just process a notch shorter than the die), the keyway is processed after heat treatment, the key 2 is placed after the keyway is processed, and then the outer diameter dimension of the iron core position is processed. The outer diameter dimension of the stacking die and the inner diameter dimension of the punching sheet are in an interference fit. Two steel plates are welded to the top of the die, and smooth holes and screw holes are drilled on the steel plates. The mold expanding bolt 3 can be used to expand the die to increase the outer diameter dimension of the die, and the mold closing bolt 4 can also be used to contract the die to reduce the die size.

[0023] The present invention solves the problem that it is difficult to control the non-uniformity during the lamination of the motor stator punching sheet, eliminates the adverse effects of the surface of the reprocessed punching sheet on the motor stator, and at the same time solves the problem of difficult demolding, reducing the cost of manufacturing the laminated stator punching sheet. The lamination and expansion tightening device for the motor stator punching sheet provided by the present invention can reduce the cost of the motor stator lamination process and ensure the lamination quality. The stator punching sheet can fully meet the technical requirements, reduce the iron loss of the motor, and improve the performance parameters of the motor. The manufacturing difficulty of the lamination process is reduced, and the lamination efficiency of the stator punching sheet is improved.

[0024] The above are only the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the concept described herein through the above teachings or the techniques or knowledge in related fields. Any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A motor stator punching lamination expansion and tightening device, characterized in that Adopt a half-and-half structure, including a motor stator core lamination die (1), a key (2), a mold expansion bolt (3), a mold closing bolt (4), an upper pressure plate (5), and a lower pressure plate (6); The motor stator core lamination die (1) is installed on the lower pressure plate (6); the upper pressure plate (5) is placed in the motor stator core lamination die (1); there is a concave keyway in the center of the motor stator core lamination die (1); the key (2) is placed in the concave keyway; there are two fixed iron sheets in the center of the upper end of the motor stator core lamination die (1), and there are circular perforations on the fixed iron sheets; the inside of the circular perforations is helical, and the mold expansion bolt (3) and the mold closing bolt (4) are installed on the fixed iron sheets; It also includes a motor stator punching sheet (7) and a motor stator retaining ring (9), and the motor stator punching sheet (7) and the motor stator retaining ring (9) are placed in the motor stator core lamination die (1); the outer diameter dimension of the motor stator core lamination die (1) and the inner diameter tolerance of the motor stator punching sheet (7) are in a transition fit.

2. The motor stator punching lamination expansion and tightening device according to claim 1, characterized in that, The models of the mold expansion bolt (3) and the mold closing bolt (4) are both M20x150.

3. The motor stator punching sheet stacking and expanding tightening device according to claim 1, characterized in that, It also includes a motor stator pull rod (8), and the motor stator pull rod (8) is used to fix and tension the motor stator punching sheet (7) and the motor stator retaining ring (9).

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