A method and structure for pressing oblique poles of a motor rotor core

Abstract

The present invention provides a method and structure for pressing the oblique poles of a motor rotor core. A press is connected to the pressing sleeve assembly. When the pressing sleeve assembly is in an initial position, the press runs axially to push the pressing sleeve assembly and the current rotor core sheet to run axially until the current rotor core sheet is pressed to a target position on the rotor shaft. Then, the press and the pressing sleeve assembly are returned to the initial position, and the rotor shaft and the shaft fixing seat are rotated so that the second positioning member is connected to another of the plurality of first positioning members and another rotor core sheet is placed. The press is then run to press the currently placed rotor core sheet to the target position on the rotor shaft so that there is an oblique pole angle between the current rotor core sheet and the previous rotor core sheet. The above pressure action process is repeated so that all rotor core sheets are pressed to the target position on the rotor shaft, thereby forming the rotor core.

Description

Technical Field

[0001] The present invention relates to the technical field of motor manufacturing, and in particular to a method and structure for pressing oblique poles of a motor rotor core. Background Art

[0002] According to the design structure of the motor, the motor rotor core is divided into several sections, and there are skew angle requirements between each section. The rotor core and the shaft are interference fit. During the trial production and assembly process, a press is required to press the rotor core, and tooling is used to ensure the skew angle of the rotor core. Summary of the Invention

[0003] In order to overcome the above technical defects, the purpose of the present invention is to provide a motor rotor core skew pole press-assembly method and structure that can realize the assembly of the rotor core at any skew pole angle.

[0004] The present invention discloses a method for pressing and assembling oblique poles of a motor rotor core, wherein a rotor core sheet is provided at the lower end of a pressing sleeve assembly; an axial first positioning pin is arranged between the pressing sleeve assembly and the rotor core sheet to fix the horizontal position between the pressing sleeve assembly and the rotor core sheet; the rotor core sheet and the pressing sleeve assembly are sleeved on the upper part of the rotor shaft, the lower part of the rotor shaft is sleeved with a shaft fixing seat, and the rotor shaft and the shaft fixing seat are fixedly connected by a first bolt; the top end of the shaft fixing seat is connected to the rotor core sheet, and the bottom end is connected to the bottom plate; a plurality of first positioning members are provided on the bottom plate, a second positioning member is provided on the shaft fixing seat, and the second positioning member is connected to one of the plurality of first positioning members, so that the horizontal position between the rotor shaft and the bottom plate is fixed; a press and the pressing sleeve assembly When the pressing sleeve assembly is connected and the pressing sleeve assembly is in the initial position, the press runs axially to push the pressing sleeve assembly and the current rotor core sheet to run axially until the current rotor core sheet is pressed to the target position on the rotor shaft; then the press and the pressing sleeve assembly are returned to the initial position, and the rotor shaft and the shaft fixing seat are rotated so that the second positioning member is connected to another of the plurality of first positioning members, and another rotor core sheet is placed; the press is run again to press the currently placed rotor core sheet to the target position on the rotor shaft, so that there is an oblique polar angle between the current rotor core sheet and the previous rotor core sheet; the above pressure action process is repeated so that all the rotor core sheets are pressed to the target position on the rotor shaft, thereby forming the rotor core.

[0005] Preferably, after each pressing operation on one rotor core sheet, the rotor shaft and the shaft fixing seat are rotated so that the second positioning member is connected to another one of the first positioning members, thereby ensuring that a skew angle exists between each rotor core sheet; or after each pressing operation on any number of rotor core sheets, the rotor shaft and the shaft fixing seat are rotated so that the second positioning member is connected to another one of the first positioning members, thereby ensuring that no skew angle exists between the rotor core sheets.

[0006] The present invention also discloses a motor rotor core oblique pole press-fit structure, comprising a pressing sleeve assembly, wherein the lower end of the pressing sleeve assembly is provided with a rotor core sheet; an axial first positioning pin is arranged between the pressing sleeve assembly and the rotor core sheet to fix the horizontal position between the pressing sleeve assembly and the rotor core sheet; the rotor core sheet and the pressing sleeve assembly are sleeved on the upper part of the rotor shaft, the lower part of the rotor shaft is sleeved with a shaft fixing seat, and the rotor shaft and the shaft fixing seat are fixedly connected by a first bolt; the top end of the shaft fixing seat is connected to the rotor core sheet, and the bottom end is connected to the bottom plate; a plurality of first positioning members are provided on the bottom plate, and a second positioning member is provided on the shaft fixing seat, and the second positioning member is connected to one of the plurality of first positioning members, so that the horizontal position between the rotor shaft and the bottom plate is fixed; a press and The pressing sleeve assembly is connected. When the pressing sleeve assembly is in the initial position, the press runs axially to push the pressing sleeve assembly and the current rotor core sheet to run axially until the current rotor core sheet is pressed to the target position on the rotor shaft; then the press and the pressing sleeve assembly are returned to the initial position, and the rotor shaft and the shaft fixing seat are rotated so that the second positioning member is connected to another of the several first positioning members, and another rotor core sheet is placed; the press is run again to press the placed current rotor core sheet to the target position on the rotor shaft, so that there is an oblique polar angle between the current rotor core sheet and the previous rotor core sheet; the above pressure action process is repeated so that all the rotor core sheets are pressed to the target position on the rotor shaft, thereby forming the rotor core.

[0007] Preferably, the first positioning member, the second positioning member and the third positioning member are positioning holes, and the first positioning member and the second positioning member are connected by a second positioning pin.

[0008] Preferably, the radial positions of the first positioning members relative to the rotor shaft are different; and / or the circumferential positions of the first positioning members relative to the rotor shaft are different.

[0009] Preferably, it also includes a pressure plate, which is arranged between the pressure sleeve assembly and the rotor core sheet; the side where the pressure plate is connected to the rotor core sheet is a first pressure surface, and the side where the rotor core sheet is in contact with the pressure plate is a second pressure surface, and the area of the first pressure surface is greater than or equal to the area of the second pressure surface, so that the rotor core sheet is fully covered by the pressure plate on the horizontal plane.

[0010] Preferably, the pressing sleeve assembly includes an upper fixing plate and a pressing sleeve, the upper fixing plate is arranged at the top end of the pressing sleeve and is fixedly connected through a connecting piece; the pressing sleeve is arranged on the upper part of the rotor shaft, and the upper fixing plate is connected to the head of the press.

[0011] Preferably, the number of the first positioning pins is at least two, and the two first positioning pins are symmetrically arranged.

[0012] Preferably, a groove is provided on the bottom plate, and a protrusion is provided at the bottom end of the shaft fixing seat. The protrusion is placed in the groove, and the radial area of the groove is larger than the radial area of the protrusion.

[0013] Compared with the existing technology, the above technical solution has the following beneficial effects:

[0014] 1. Suitable for assembling motor rotor cores with irregularly skewed pole segments. Simply machining different locating holes on the base plate based on the skew angle and number of core segments is sufficient. By aligning and connecting the different locating holes on the base plate with the different locating holes on the shaft mount, the rotor core can be assembled with any skew angle, eliminating the need for multiple different rotor core punchings. This reduces core processing costs and offers greater versatility. Furthermore, assembly requires minimal equipment, requiring only a small-tonnage press and an oven for preheating the core, resulting in low production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 An axial cross-sectional view of the motor rotor core oblique pole press-fit structure provided by the present invention;

[0016] Figure 2 A schematic diagram of the skew angle of the rotor core of the motor rotor core skew pole press-fit structure provided by the present invention;

[0017] Figure 3 A top view of the bottom plate of the motor rotor core oblique pole press-fit structure provided by the present invention;

[0018] Figure 4 This is a top view of the shaft fixing seat of the motor rotor core oblique pole press-fit structure provided by the present invention.

[0019] Among them: 1-rotor core sheet, 2-rotor shaft, 3-pressing sleeve, 4-upper fixing plate, 5-second bolt, 6-shaft fixing seat, 7-bottom plate, 8-first bolt, 9-pressing plate, 10-balancing plate, 11-first positioning pin, 12-first positioning piece, 13-second positioning piece, 14-third positioning piece. DETAILED DESCRIPTION

[0020] The advantages of the present invention are further described below with reference to the accompanying drawings and specific embodiments.

[0021] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0022] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0023] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining."

[0024] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0025] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal communication between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0026] In the following description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present invention and have no specific meaning. Therefore, "module" and "component" can be used interchangeably.

[0027] When designing the motor structure, the number of segments and the skew angle of the rotor core are generally designed as relatively regular parameters. Then, only keys need to be added between the shaft and the core, or positioning holes need to be added to the core to ensure that each segment of the rotor core rotates at the skew angle. If the keyways or positioning holes of all the cores are through, the skew angle of the core can be ensured by keys or positioning pins during assembly.

[0028] When the number of rotor core segments and the skew angle are irregular, ensuring proper core skew generally requires stacking different rotor laminations into rotor cores of varying shapes. The cores differ in the location of their keyways or locating holes. Alternatively, using the same rotor core, clamps can be used on the production line to hold the core's outer diameter before pressing it down. This method is suitable for mass production. Another approach involves first skewing all the cores, then locking them together using a fixture, and then pressing them onto the shaft.

[0029] The present invention does not adopt any of the above three methods, but adopts the same rotor core, assembles each section of the core separately, and uses positioning holes and positioning pins for positioning.

[0030] For details, see the attached Figure 1 、 4 The present invention discloses a skew-pole press-fit structure for a motor rotor core 1, comprising a press-fit assembly. A rotor core segment 1 is disposed at its lower end. Axial positioning pins are provided between the press-fit assembly and the rotor core segment 1 to secure them horizontally. The rotor core segment 1 and the press-fit assembly are sleeved onto the upper portion of a rotor shaft 2, and the press-fit assembly applies pressure to the rotor core 1, causing it to be assembled to its corresponding position on the rotor shaft 2.

[0031] A shaft fixing seat 6 is sleeved on the lower portion of the rotor shaft 2, and the rotor shaft 2 and the shaft fixing seat 6 are fixedly connected by a first bolt 8 to ensure the fixed position of the rotor shaft 2. The top end of the shaft fixing seat 6 is connected to the stepped protrusion of the rotor shaft 2, and the bottom end is connected to the bottom plate 7.

[0032] For details, see the attached Figure 3-4 The shaft fixing seat 6 is provided with a second positioning member 13, and the base plate 7 is provided with a plurality of first positioning members 12. The second positioning member 13 is connected to one of the plurality of first positioning members 12, so that the horizontal position between the rotor shaft 2 and the base plate 7 is fixed. The first positioning members 12 on different base plates 7 are connected to the second positioning members 13 on the shaft fixing seat 6, so as to change the circumferential position of the rotor shaft 2, so that there is a skew angle between the rotor cores 1 assembled on the rotor shaft 2 (see the attached Figure 2 ), the position of the second positioning member 13 on the shaft fixing seat 6 can be flexibly set, thereby affecting the skew pole angle between the rotor cores 1.

[0033] See attached Figure 3 A third positioning member 14 is also provided on the bottom plate 7. Usually, the third positioning member 14 is also a positioning hole, and is connected to the base of the press through the third positioning member.

[0034] Preferably, the first positioning member 12 and the second positioning member 13 are positioning holes, and the first positioning member 12 and the second positioning member 13 are connected by a second positioning pin (not shown in the figure). The positioning pin makes the separation and combination between the first positioning member 12 and different second positioning members 13 faster and more convenient.

[0035] In other embodiments, the first positioning member 12 and the second positioning member 13 also use positioning holes, but in order to ensure the position stability between the two holes, bolt connection can be used.

[0036] In another preferred embodiment, the first positioning member 12 may be a latch, and the second positioning member 13 may be a block, and the latch is connected to different blocks by latching.

[0037] Preferably, the number and position of the positioning holes are designed according to the skew angle and the number of segments of the rotor core 1: the radial positions of the second positioning members 13 relative to the rotor shaft 2 are different and / or the circumferential positions of the second positioning members 13 relative to the rotor shaft 2 are different. Figure 3 There are 7 first positioning holes at different positions on the bottom plate 7, some of which are at different circumferential positions on the same diameter circle, while others are located on different diameter circles.

[0038] Preferably, a pressure plate 9 is further included. The pressure plate 9 is provided between the pressing sleeve assembly and the rotor core sheet 1 to transmit pressure and increase the force-bearing area of the rotor core 1 .

[0039] The side where the pressure plate 9 connects to the rotor core sheet 1 is the first pressure surface, and the side where the rotor core sheet 1 contacts the pressure plate 9 is the second pressure surface. The area of the first pressure surface is greater than or equal to the area of the second pressure surface, so that the rotor core sheet 1 is fully covered by the pressure plate 9 on the horizontal plane.

[0040] Preferably, the press sleeve assembly includes an upper fixing plate 4 and a press sleeve 3. The upper fixing plate 4 is positioned at the top of the press sleeve 3 and is fixedly connected via a connector. The connector is typically a bolt, shown as a second bolt 5. The upper fixing plate 4 is connected to the press head. The press sleeve 3 is sleeved on the upper portion of the rotor shaft 2 and acts on the pressing plate 9. The pressure from the press head acts on the pressing plate 9 through the upper fixing plate 4 and the press sleeve 3, thereby acting on the rotor core 1.

[0041] Preferably, the number of the first positioning pins 11 used for the pressing sleeve assembly and the rotor core sheets 1 is at least two, and the two first positioning pins 11 are symmetrically arranged.

[0042] In other embodiments, there may be three or more first positioning pins 11 , but the plurality of first positioning pins 11 are symmetrically arranged to ensure the stability of the force for fixing the rotor shaft 2 and the shaft fixing seat 6 .

[0043] Preferably, the shaft fixing seat 6 is in the shape of an I-shaped character, and the upper end surface and the lower end surface are subjected to force simultaneously, so that the supporting effect is more stable.

[0044] Specifically, the rotor shaft 2 has a stepped protrusion, and the upper end surface of the shaft fixing seat 6 contacts the stepped protrusion of the rotor shaft 2 to support the rotor shaft 2. The rotor core is placed on the stepped protrusion of the rotor shaft 2.

[0045] The base plate 7 is connected to the base of the press, and a groove is provided on the base plate 7. A protrusion is provided on the lower end surface of the shaft fixing seat 6. The protrusion is placed in the groove and is fixed by a first bolt 8. The radial area of the groove is larger than the radial area of the protrusion, ensuring that the first positioning member 12 on the shaft fixing seat 6 can fit with the different second positioning members 13 on the base plate 7.

[0046] The specific working process of the motor rotor core 1 oblique pole press-fit structure of the present invention is as follows:

[0047] The head of the press is connected to the pressing sleeve assembly. When the pressing sleeve assembly is in the initial position, the press moves axially, pushing the pressing sleeve assembly and the current rotor core sheet 1 to move axially until the current rotor core sheet 1 is pressed to the target position on the rotor shaft 2. At this point, the current rotor core 1 is assembled.

[0048] Next, the press and the pressing sleeve assembly are returned to their initial positions, and the rotor shaft 2 and the shaft fixing seat 6 are rotated so as to connect with another one of the plurality of first positioning members 12, and another rotor core sheet 1 is placed, thereby changing the circumferential position of the rotor shaft 2 (which is equivalent to changing the circumferential position of the previously assembled rotor core 1).

[0049] Then, the press is operated to press the currently placed rotor core sheet 1 to a target position on the rotor shaft 2 so that there is a skew polar angle between the currently placed rotor core sheet 1 and the previous rotor core sheet 1 ;

[0050] The above pressure action process is repeated so that all rotor core sheets 1 are pressed to target positions on the rotor shaft 2 , thereby forming the rotor core 1 .

[0051] The present invention discloses a method for pressing an oblique pole of a motor rotor core 1, comprising the following steps:

[0052] The press is connected to the pressing sleeve assembly. When the pressing sleeve assembly is in the initial position, the press moves axially to push the pressing sleeve assembly and the current rotor core sheet 1 to move axially until the current rotor core sheet 1 is pressed to the target position on the rotor shaft 2.

[0053] Then, the press and the pressing sleeve assembly are returned to the initial position, and the rotor shaft 2 and the shaft fixing seat 6 are rotated to connect with another one of the plurality of first positioning members 12, and another rotor core sheet 1 is placed;

[0054] Then, the press is operated to press the currently placed rotor core sheet 1 to a target position on the rotor shaft 2 so that there is a skew polar angle between the currently placed rotor core sheet 1 and the previous rotor core sheet 1 ;

[0055] The above pressure action process is repeated so that all rotor core sheets 1 are pressed to target positions on the rotor shaft 2 , thereby forming the rotor core 1 .

[0056] Preferably, after each pressing action on a rotor core sheet 1 , the rotor shaft 2 and the shaft fixing seat 6 are rotated to connect with another one of the first positioning members 12 , so that a skew polar angle exists between each rotor core sheet 1 .

[0057] For example, the skew polar angle between the first and second segments is α1, the skew polar angle between the second and third segments is α2, and the skew polar angle between the third and fourth segments is α3. α1 may be equal to or different from α2; similarly, α1 may be equal to or different from α3. When the skew polar angles are the same, the skew polar angles of the rotor core 1 are regular; when they are different, the skew polar angles of the rotor core 1 are irregular.

[0058] The irregular skew angle of the rotor core 1 is also reflected in the following embodiments. After the pressure is applied to any number of rotor core segments 1, the rotor shaft 2 and the shaft fixing seat 6 are rotated to connect with another one of the plurality of first positioning members 12, so that there is no skew angle between the plurality of rotor core segments 1, thereby meeting the irregular requirements between the core segments.

[0059] For example, the oblique polar angle between the first and second segments is α1, there is no oblique polar angle between the second and third segments, the oblique polar angle between the third and fourth segments is α2, etc. α1 may be equal to α2 or may not be equal to α2.

[0060] It should be noted that, since the rotor core 1 and the rotor shaft 2 are interference fit, the rotor core 1 needs to be heated in advance.

[0061] It should be noted that the embodiments of the present invention have better practicability and do not impose any form of limitation on the present invention. Any technician familiar with the field may use the technical content disclosed above to change or modify it into an equivalent effective embodiment. However, any modification or equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for pressing the oblique poles of a motor rotor core, characterized in that: The lower end of the pressing sleeve assembly is provided with a rotor core sheet; a first axial positioning pin is provided between the pressing sleeve assembly and the rotor core sheet to fix the horizontal position between the pressing sleeve assembly and the rotor core sheet; The rotor core sheets and the pressing sleeve assembly are sleeved on the upper part of the rotor shaft, the lower part of the rotor shaft is sleeved with a shaft fixing seat, and the rotor shaft and the shaft fixing seat are fixedly connected by a first bolt; the rotor shaft has a stepped protrusion, the upper end surface of the shaft fixing seat contacts the stepped protrusion of the rotor shaft to support the rotor shaft, and the rotor core sheets are placed on the stepped protrusion of the rotor shaft; the top end of the shaft fixing seat is connected to the rotor core sheets, and the bottom end is connected to the bottom plate; a plurality of first positioning members are provided on the bottom plate, and a second positioning member is provided on the shaft fixing seat, and the second positioning member is connected to one of the plurality of first positioning members, so that the horizontal position between the rotor shaft and the bottom plate is fixed; The first positioning member and the second positioning member are positioning holes, and the second positioning member is connected to the first positioning member via a second positioning pin; the first positioning members are at different radial positions relative to the rotor shaft; and / or the first positioning members are at different circumferential positions relative to the rotor shaft; The press is connected to the pressing sleeve assembly. When the pressing sleeve assembly is in the initial position, the press moves axially to push the pressing sleeve assembly and the current rotor core sheet to move axially until the current rotor core sheet is pressed to the target position on the rotor shaft. Then, the press and the pressing sleeve assembly are returned to the initial position, and the rotor shaft and the shaft fixing seat are rotated so that the second positioning member is connected to another one of the plurality of first positioning members, and another rotor core sheet is placed; Then, the press is operated to press the currently placed rotor core sheet to a target position on the rotor shaft, so that a skew polar angle exists between the currently placed rotor core sheet and the previous rotor core sheet; The above pressure action process is repeated so that all the rotor core sheets are pressed to the target position on the rotor shaft, thereby forming the rotor core.

2. The method for pressing the skew poles of the motor rotor core according to claim 1, characterized in that: After each pressing operation on one rotor core sheet, the rotor shaft and the shaft fixing seat are rotated so that the second positioning member is connected to another one of the plurality of first positioning members, thereby ensuring that a skew polar angle exists between each rotor core sheet; Or after pressing any number of the rotor core sheets, the rotor shaft and the shaft fixing seat are rotated so that the second positioning member is connected to another one of the first positioning members, so that there is no skew angle between the rotor core sheets.

3. A motor rotor core oblique pole press-fit structure, characterized in that: The invention comprises a pressing sleeve assembly, wherein the lower end of the pressing sleeve assembly is provided with a rotor core sheet; a first axial positioning pin is provided between the pressing sleeve assembly and the rotor core sheet to fix the horizontal position between the pressing sleeve assembly and the rotor core sheet; The rotor core sheets and the pressing sleeve assembly are sleeved on the upper part of the rotor shaft, the lower part of the rotor shaft is sleeved with a shaft fixing seat, and the rotor shaft and the shaft fixing seat are fixedly connected by a first bolt; the rotor shaft has a stepped protrusion, the upper end surface of the shaft fixing seat contacts the stepped protrusion of the rotor shaft to support the rotor shaft, and the rotor core sheets are placed on the stepped protrusion of the rotor shaft; the top end of the shaft fixing seat is connected to the rotor core sheets, and the bottom end is connected to the bottom plate; a plurality of first positioning members are provided on the bottom plate, and a second positioning member is provided on the shaft fixing seat, and the second positioning member is connected to one of the plurality of first positioning members, so that the horizontal position between the rotor shaft and the bottom plate is fixed; The first positioning member and the second positioning member are positioning holes, and the second positioning member is connected to the first positioning member via a second positioning pin; the first positioning members are at different radial positions relative to the rotor shaft; and / or the first positioning members are at different circumferential positions relative to the rotor shaft; The press is connected to the pressing sleeve assembly. When the pressing sleeve assembly is in the initial position, the press moves axially to push the pressing sleeve assembly and the current rotor core sheet to move axially until the current rotor core sheet is pressed to the target position on the rotor shaft. Then, the press and the pressing sleeve assembly are returned to the initial position, and the rotor shaft and the shaft fixing seat are rotated so that the second positioning member is connected to another one of the plurality of first positioning members, and another rotor core sheet is placed; Then, the press is operated to press the currently placed rotor core sheet to a target position on the rotor shaft, so that a skew polar angle exists between the currently placed rotor core sheet and the previous rotor core sheet; The above pressure action process is repeated so that all the rotor core sheets are pressed to the target position on the rotor shaft, thereby forming the rotor core.

4. The motor rotor core skew pole press-fit structure according to claim 3, characterized in that: It also includes a pressing plate, which is arranged between the pressing sleeve assembly and the rotor core sheet; The side where the pressure plate connects to the rotor core sheet is the first pressure surface, and the side where the rotor core sheet contacts the pressure plate is the second pressure surface. The area of the first pressure surface is greater than or equal to the area of the second pressure surface, so that the rotor core sheet is fully covered by the pressure plate on the horizontal plane.

5. The motor rotor core skew pole press-fit structure according to claim 3, characterized in that: The pressing sleeve assembly includes an upper fixing plate and a pressing sleeve, wherein the upper fixing plate is arranged on the top end of the pressing sleeve and is fixedly connected via a connecting piece; The pressing sleeve is sleeved on the upper part of the rotor shaft, and the upper fixing plate is connected to the head of the press.

6. The motor rotor core skew pole press-fit structure according to claim 3, characterized in that: The number of the first positioning pins is at least two, and the two first positioning pins are symmetrically arranged.

7. The motor rotor core skew pole press-fit structure according to claim 3, characterized in that: The bottom plate is provided with a groove, the bottom end of the shaft fixing seat is provided with a convex block, the convex block is placed in the groove, and the radial area of the groove is larger than the radial area of the convex block.

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