Stacking tool for motor rotor core

Abstract

The utility model discloses a kind of stacked pressure tool for motor rotor core, including bottom plate, push mechanism and shaping mechanism. Push mechanism is symmetrically arranged at the both sides of bottom plate, and shaping mechanism is arranged between two push mechanisms. Shaping mechanism includes horizontally movable shaping column, rib positioning column and positioning rib, and the accommodation space is enclosed by the shaping column and rib positioning column, for stacking rotor sheet, and positioning rib and rotor sheet notch are embedded to realize initial positioning. Push mechanism drives pressing plate to push shaping column radial motion by air cylinder, and the shaping of rotor sheet outer circle is realized. Positioning strip can be vertically arranged, for straight slot rotor core forming. It can also be arranged at a certain angle with rotor shaft, for slant slot rotor core forming. The utility model has reasonable structure, clamping and positioning are fast, and the scope of application is wide. It can be compatible with the manufacture of straight slot and slant slot rotor core, effectively shorten the development cycle of new stacked pressure tool, reduce the replacement frequency and production cost of stacked pressure tool.

Description

Technical Field

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

[0002] Most existing motor rotor core stacking fixtures are specialized structures with limited applicability. In particular, when machining rotor cores with torsional angles, it is often necessary to design fixtures separately for specific specifications, which not only results in long processing cycles and high manufacturing costs, but also significantly increases the development cycle and costs of new products.

[0003] Currently, the most common slot types for motor rotor cores include straight slots and inclined slots, such as... Figure 1 , Figure 2 As shown. The rotor core is typically formed by stacking rotor laminations approximately 0.5mm thick layer by layer using a stacking fixture, followed by pressing onto a mandrel, thus creating a straight-slot or skew-slot rotor core. Existing forming methods (such as...) Figure 3 , Figure 4 (As shown) The main method relies on tooling to conform the outer circle and inner wall of the rotor blades, and then uses a cylinder to clamp the rotor blades to complete the forming and assemble the shaft.

[0004] However, this type of tooling has significant limitations: when the outer diameter or other critical dimensions of the rotor laminations are slightly adjusted, the original tooling loses its conformation accuracy, requiring the redesign and manufacture of new tooling; the conformation components account for a high portion of the tooling's value. Particularly for skewed slot rotor cores, due to the strict requirements on the slot inclination angle, even when the stacking height of identical rotor laminations changes, the corresponding forming mold must be replaced, resulting in tooling incompatibility between different products. Consequently, problems such as tooling mismatch, excessively long development cycles, and high costs easily arise during new product development, severely restricting rotor core production efficiency and product iteration speed. Utility Model Content

[0005] The purpose of this invention is to provide a stacking fixture for motor rotor cores that has a reasonable structure and strong applicability, overcoming the problems of poor versatility, low production efficiency, and high development costs in existing fixtures. Through innovative design of the forming and pressing mechanisms, this fixture can adapt to the stacking requirements of rotor laminations of different specifications, improve the compatibility and reusability of the fixture, thereby shortening the new product development cycle, reducing production costs, and significantly improving the forming accuracy and production efficiency of the rotor core.

[0006] To achieve the above objectives, this utility model provides a stacking fixture for a motor rotor core, comprising a base plate, a pressing mechanism disposed on the base plate, and a shaping mechanism disposed on the base plate; the motor rotor core is formed by stacking a plurality of rotor laminations, each rotor lamination having slots, and the slots on the plurality of rotor laminations stacked together forming a through slot on the surface of the motor rotor core; the shaping mechanism includes a plurality of vertically arranged, horizontally movable shaping columns, a plurality of vertically arranged rib positioning columns, and positioning ribs disposed on the rib positioning columns; the plurality of shaping columns and the plurality of rib positioning columns enclose a receiving space for accommodating a plurality of rotor laminations, and the plurality of rotor laminations are vertically stacked within this receiving space; the positioning ribs cooperate with the slots at the same locations on the plurality of rotor laminations for initial positioning of the plurality of rotor laminations, and the pressing mechanism is used to push the plurality of shaping columns to shape the plurality of rotor laminations within the receiving space.

[0007] The base plate serves as the supporting foundation, bearing the pressing and shaping mechanisms. The pressing mechanism applies pressure to the shaping columns, thereby shaping the rotor laminations within the accommodating space. The shaping mechanism uses movable shaping columns and positioning ribs to define the rotor lamination positions, ensuring positional accuracy during the stacking process. This structure enables rapid clamping, shaping, and positioning of the rotor laminations, improving the stability and accuracy of the stacking process, reducing the need for tooling redesign due to dimensional changes, and thus enhancing tooling versatility. The rib positioning columns provide fixed support, and the positioning ribs engage with the rotor lamination slots to achieve initial positioning and limiting of the rotor laminations, preventing rotation or displacement during stacking. This structure allows for rapid and accurate initial positioning of the rotor laminations, reducing manual correction, improving production efficiency, and ensuring the alignment accuracy of the rotor core slots after forming.

[0008] Preferably, there are two pressing mechanisms, each disposed on one side of the base plate, and the shaping mechanism is disposed between the two pressing mechanisms; there are two rib positioning columns and two positioning ribs, each corresponding to two through slots formed by stacking on several rotor plates; there are four shaping columns, and the pressing mechanisms on both sides cooperate with two of the shaping columns respectively, and the two pairs of shaping columns are disposed between the pressing mechanism and the arc-shaped yoke on the rotor plate, and the shaping columns are cylindrical.

[0009] By symmetrically arranging two pressing mechanisms on both sides of the base plate, the forming force can be evenly applied to both sides of the rotor laminations, avoiding misalignment of the rotor laminations due to uneven loading. The forming mechanism is positioned between the two mechanisms, which helps to create a stable working space for force distribution. This design ensures uniform force distribution on the rotor laminations, improves the overall verticality and parallelism of the stacked components, and thus achieves a higher precision rotor core forming effect.

[0010] Four vertically positioned shaping columns can move horizontally to form a space for stacking rotor laminations. Their positions are adjusted by a pressing mechanism, shaping the outer circumference of the rotor laminations under pressure. This design allows for adaptive shaping of rotor laminations with different outer diameters, enhancing the tooling's compatibility with different rotor lamination models and avoiding the need to remake the tooling for minor dimensional adjustments. The shaping columns are cylindrical, interacting with the yoke of the rotor laminations to achieve line contact, facilitating the shaping of multiple rotor laminations.

[0011] Furthermore, a pad is fixedly installed on the base plate; four cams are installed between the base plate and the pad, one end of each of the four cams is installed on the base plate via a camshaft, and the four shaping columns are fixedly installed at the protruding tips of the four cams; an arc-shaped groove through which the shaping columns pass is opened on the pad.

[0012] A cam is installed between the base plate and the pad plate, and the shaping column is fixed at the cam tip. The shaping column moves by rotating the cam around the cam shaft. When the pressing mechanism pushes the shaping column, it facilitates the movement of the shaping column towards the side of several rotor plates, thereby achieving vertical leveling of the rotor plates by the shaping column. The arc-shaped groove provides a guide channel for the shaping column and also provides limiting support. The cam mechanism enables precise adjustment of the shaping column, ensuring symmetry and roundness during the rotor plate stacking process, improving forming accuracy, and providing strong flexible adjustment capability.

[0013] Furthermore, the pushing mechanism includes a cylinder and a pressure plate disposed on the cylinder telescopic rod; the cylinder is fixed to the base plate by a mounting plate and is horizontally positioned.

[0014] The cylinder provides a stable horizontal thrust, driving the pressure plate to act on the forming column, causing the forming column to radially shape the rotor blades. Pneumatic control enables a fast, stable, and controllable pressurization process, ensuring consistent stress on the rotor blades during forming, reducing human error, and improving automation and production efficiency.

[0015] Preferably, a slotted hole is provided on the base plate for adjusting the position of the rib positioning post, and the rib positioning post is fixed to the base plate by bolts passing through the slotted hole.

[0016] The position of the rib positioning post on the base plate is adjusted via a slotted hole, and its position is fixed by bolts. This allows the position of the rib positioning post to be adjusted according to the slot spacing of different rotor laminations. This enhances the versatility and flexibility of the tooling, making the same tooling compatible with rotor cores of different specifications, effectively reducing the frequency of tooling changes and development costs.

[0017] Preferably, a limiting groove is vertically provided on the side of the rib positioning column facing the accommodating space; the positioning rib includes a positioning plate and a positioning strip disposed on the positioning plate, the positioning plate is disposed in the limiting groove, and the positioning strip extends out of the limiting groove and engages with the slot on the rotor plate.

[0018] The positioning plate is embedded in the limiting groove of the rib positioning column, and the positioning strip extends out and fits into the slot of the rotor plate. This combined structure ensures the stability of the positioning strip and achieves precise slot limiting, avoiding slot misalignment during the stacking process and improving molding consistency.

[0019] More preferably, the positioning strip is arranged vertically.

[0020] The vertical positioning bar directly connects to the slot of the rotor plate, and uses the depth structure of the slot for positioning, thus enabling the direct production of straight slot rotors.

[0021] More preferably, the positioning bar is set at an angle to the core shaft of the motor rotor core.

[0022] The positioning bars are arranged at a certain angle to match the tilt angle of the skewed slot rotor core, thus ensuring accurate positioning of rotor laminations with different slot angles. This makes the stacking fixture compatible with both straight and skewed slot rotor laminations, expanding the fixture's applicability, avoiding the need to redesign the fixture due to changes in slot angle, reducing development costs, and accelerating product iteration.

[0023] This utility model discloses a stacking fixture for motor rotor cores. By setting a pushing mechanism and a shaping mechanism on the base plate, the rotor laminations are initially positioned by the engagement of positioning ribs with the slots. Then, a cylinder-driven pressure plate pushes shaping columns, which, guided by cams and arc-shaped grooves, apply radial shaping force to the rotor laminations within the accommodating space. This allows the stacked rotor laminations to gradually correct their position and achieve outer circumference shaping during the force application process. Through the coordinated movement of the four shaping columns, the rotor laminations can be uniformly stressed in the horizontal direction, ensuring symmetry and roundness during the stacking process.

[0024] This utility model features a rationally designed tooling structure that is compatible with rotor laminations of different specifications and slot shapes. It enables high-precision positioning and shaping of straight-slot and skew-slot rotor cores, improving the tooling's applicability and reusability. This design not only reduces the need for tooling replacement due to rotor lamination size adjustments or slot shape changes, significantly lowering new product development costs and timelines, but also achieves a fast, stable, and controllable forming process through cylinder drive and cam adjustment, improving the rotor core's machining accuracy and production efficiency. Attached Figure Description

[0025] A brief explanation of the contents of each figure in the instruction manual and the markings in the figures is provided:

[0026] Figure 1This is a schematic diagram of the structure of a single-slot rotor as shown in the embodiment;

[0027] Figure 2 This is a schematic diagram of the skewed slot rotor in Example 2;

[0028] Figure 3 A 3D view of the existing stacking fixture;

[0029] Figure 4 for Figure 3 Top view;

[0030] Figure 5 These are schematic diagrams of the rotor plates in Embodiment 1 and Embodiment 2;

[0031] Figure 6 This is a perspective view of the stacking fixture in Example 1;

[0032] Figure 7 for Figure 6 Top view;

[0033] Figure 8 This is a schematic diagram of the positioning ribs used in the production of straight slot rotors in Example 1;

[0034] Figure 9 This is a schematic diagram of the positioning ribs used in the production of straight slot rotors in Example 2;

[0035] In the diagram: 1 is the base plate; 2 is the pressing mechanism; 21 is the cylinder; 22 is the pressure plate; 3 is the shaping mechanism; 31 is the shaping column; 32 is the rib positioning column; 33 is the positioning rib; 34 is the positioning plate; 35 is the positioning strip; 4 is the rotor plate; 41 is the slot; 42 is the yoke; 5 is the through slot; 6 is the pad plate; 7 is the cam; 8 is the arc-shaped slot; 9 is the waist-shaped hole; 10 is the rotor shaft; 11 is the mounting plate. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings, providing a non-limiting embodiment. However, it should be understood that these descriptions are merely illustrative and not intended to limit the scope of the present invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the present invention.

[0037] Example: Straight-slot rotor core stacking fixture

[0038] like Figure 1 , Figure 5 , Figure 6 , Figure 7 , Figure 8As shown, a stacking fixture for motor rotor cores includes a base plate 1, a pressing mechanism 2 symmetrically arranged on both sides of the base plate 1, and a shaping mechanism 3 arranged therebetween. The pressing mechanism 2 includes a horizontally arranged cylinder 21 and a pressure plate 22 mounted on its telescopic rod. The cylinder 21 is fixed to the base plate 1 by a mounting plate 11. The shaping mechanism 3 consists of four horizontally movable vertical shaping columns 31, two vertical rib positioning columns 32, and positioning ribs 33 mounted on the rib positioning columns 32. The positioning ribs 33 consist of a positioning plate 34 and positioning strips 35 arranged on the positioning plate 34. A pad 6 is fixed on the base plate 1. Four cams 7 are arranged between the base plate 1 and the pad 6. The cams 7 are rotatably connected to the base plate 1 via camshafts. The four shaping columns 31 are respectively fixed to the protrusions of the four cams 7. An arc-shaped groove 8 is formed on the pad 6 to cooperate with the shaping columns 31, so as to guide and limit the horizontal movement of the shaping columns 31. The base plate 1 is provided with a waist-shaped hole 9, and the rib positioning column 32 is fixed by bolts passing through the waist-shaped hole 9, so that its position can be adjusted within the plane of the base plate 1.

[0039] In this embodiment, as Figure 5 As shown, the rotor lamination 4 has a two-pole structure, with symmetrical slots 41 on its front and rear sides and arc-shaped yokes 42 at both ends; several rotor laminations 4 are stacked vertically, and their slots 41 are overlapped to form two through slots 5 on the surface of the motor rotor core. Figure 6 , Figure 7 As shown, during assembly, the relative positions of the two rib positioning posts 32 are first finely adjusted through the waist-shaped hole 9, so that the two positioning strips 35 correspond to the two through slots 5. The positioning plate 34 is placed into the vertical slot on the side of the limiting groove of the rib positioning post 32 facing the accommodating space, so that the positioning strips 35 extend vertically and fit into the slots 41 of the rotor plates 4 to complete the initial positioning of several rotor plates 4, wherein the positioning strips 35 are set vertically. Subsequently, the cylinders 21 on both sides are activated, and the pressure plate 22 pushes the two adjacent shaping posts 31 respectively. Under the guidance of the cam 7-arc groove 8, the shaping posts 31 move horizontally synchronously towards the center of the accommodating space, applying a uniform radial shaping force to several rotor plates 4 stacked in the accommodating space, so that the outer circle and position of several stacked rotor plates 4 are gradually corrected. After the shaping is completed, the rotor core is fixed into an integral rotor core through the stacking process, and the rotor shaft 10 is pressed in to obtain a straight slot rotor.

[0040] This embodiment achieves rapid clamping, precise positioning, and highly consistent shaping of the straight slot rotor plate 4. With the help of the planar adjustable oblong hole 9, the tooling can accommodate small changes in different slot pitches and outer diameters, significantly reducing the frequency of tooling remaking due to specification adjustments; the matching of the cam 7 guide and the cylindrical shaping column 31 ensures stable concentricity, roundness, and parallelism of the stacked parts.

[0041] Example 2: Slanted Rotor Core Stacking Fixture

[0042] This embodiment is a modification of Embodiment 1, and its structure and component numbers are the same, so they will not be described again. The difference from Embodiment 1 is that: Figure 2 , Figure 5 , Figure 6 , Figure 7 , Figure 9 As shown, the positioning strip 35 is arranged at a set angle relative to the core shaft of the motor rotor core, inclined relative to the vertical direction. During assembly, the positioning plate 34 with the inclined positioning strip 35 is inserted into the limiting groove of the rib positioning post 32, so that the positioning strip 35 extends out at a preset angle; as shown... Figure 2 As shown, during the loading of rotor laminations 4, the slots 41 of the rotor laminations 4 are guided by the inclined positioning strips 35 and fitted one lamination after another. Due to the inclination of the positioning strips 35, the stacking process causes continuous micro-angle deflection between adjacent rotor laminations 4. Finally, the two through slots 5 form a helical shape in the axial direction, completing the stacking and shaping of the skewed rotor core. Then, the integral skewed rotor core is fixed by the stacking process, and finally, the rotor shaft 10 is pressed in to produce the skewed rotor.

[0043] This embodiment achieves the shaping of the skewed rotor core on the same tooling platform simply by replacing or adjusting the inclination angle of the positioning strip 35 in the positioning rib 33. No changes are needed to the shaping column 31, the pressing mechanism 2, or the cam 7-guide system, thus enabling rapid switching between straight and skewed slot specifications with minimal replacement parts. This solution significantly improves the versatility and reusability of the stacking tooling while maintaining force symmetry and a consistent shaping path, reducing the development and manufacturing costs of multiple product series.

[0044] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A lamination press tool for an electric motor rotor core, characterized by, The system includes a base plate (1), a pressing mechanism (2) respectively disposed on the base plate (1), and a shaping mechanism (3) disposed on the base plate (1); the motor rotor core is formed by stacking several rotor plates (4), and the rotor plates (4) are provided with slots (41), and the slots (41) on several rotor plates (4) are stacked to form through slots (5) on the surface of the motor rotor core; the shaping mechanism (3) includes several vertically arranged horizontally movable shaping columns (31), several vertically arranged rib positioning columns (32), and a rib positioning column (32) disposed on the rib. Positioning ribs (33) on the positioning column (32); a plurality of shaping columns (31) and a plurality of rib positioning columns (32) surround to form an accommodating space for a plurality of rotor plates (4), and a plurality of rotor plates (4) are stacked vertically in the accommodating space; the positioning ribs (33) and the slots (41) at the same location on the plurality of rotor plates (4) cooperate for the initial positioning of the plurality of rotor plates (4); the pushing mechanism (2) is used to push the plurality of shaping columns (31) to shape the plurality of rotor plates (4) in the accommodating space.

2. The stacking fixture for motor rotor cores as described in claim 1, characterized in that, There are two pressing mechanisms (2) and they are respectively set on both sides of the base plate (1). The shaping mechanism (3) is set between the two pressing mechanisms (2). There are two rib positioning columns (32) and two positioning ribs (33), and they correspond to two through slots (5) formed by stacking on several rotor plates (4). There are four shaping columns (31). The pressing mechanisms (2) on both sides cooperate with two of the shaping columns (31). The two shaping columns (31) are respectively set between the pressing mechanism (2) and the arc-shaped yoke (42) on the rotor plate (4). The shaping column (31) is cylindrical.

3. The stacking fixture for motor rotor cores as described in claim 2, characterized in that, A pad (6) is also fixedly installed on the base plate (1); four cams (7) are provided between the base plate (1) and the pad (6), one end of each of the four cams (7) is set on the base plate (1) through a camshaft, and four shaping columns (31) are fixedly installed at the protruding tips of the four cams (7); an arc groove (8) through which the shaping column (31) passes is opened on the pad (6).

4. The stacking fixture for motor rotor cores as described in claim 3, characterized in that, The pushing mechanism (2) includes a cylinder (21) and a pressure plate (22) disposed on the telescopic rod of the cylinder (21); the cylinder (21) is fixed on the base plate (1) by a mounting plate (11), and the cylinder (21) is horizontally disposed.

5. The stacking fixture for motor rotor cores as described in claim 1, characterized in that, A waist-shaped hole (9) for adjusting the position of the rib positioning column (32) is provided on the base plate (1). The rib positioning column (32) is fixed on the base plate (1) by bolts passing through the waist-shaped hole (9).

6. The stacking fixture for motor rotor cores as described in claim 1, characterized in that, A limiting groove is vertically provided on the side of the rib positioning column (32) facing the accommodating space; the positioning rib (33) includes a positioning plate (34) and a positioning strip (35) provided on the positioning plate (34). The positioning plate (34) is provided in the limiting groove, and the positioning strip (35) extends out of the limiting groove and is engaged with the slot (41) on the rotor plate (4).

7. The stacking fixture for motor rotor cores as described in claim 6, characterized in that, The positioning bar (35) is set vertically.

8. The stacking fixture for motor rotor cores as described in claim 6, characterized in that, The positioning bar (35) is set at an angle to the core shaft of the motor rotor core.

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