Self-adhesive iron core stacking tool

Abstract

The self-adhesion iron core stacking tool comprises an iron core base made in a linear cutting mode, an isolation piece and an iron core pressing plate, an iron core shaft core made in a centerless grinding mode is fixedly installed in the center of the iron core base, one end of the iron core shaft core extends towards the outer portion of the iron core base, and the other end of the iron core shaft core extends towards the inner portion of the iron core pressing plate. The iron core shaft core is sleeved with a plurality of isolation sheets and stator punching sheets, and the other end of the iron core shaft core is provided with an iron core pressing plate which is fixedly connected with the iron core base. According to the utility model, the design structure is simple, the use is convenient, the iron core base, the iron core pressing plate and the isolation sheet which are manufactured by using a linear cutting mode are matched with the iron core shaft core which is manufactured by high-precision centerless grinding, the lamination precision can be improved in the lamination process of the stator punching sheets, and the stator punching sheets are pressed under the action of the compression bolts, so that the production efficiency is improved. And the subsequent bonding firmness of the laminations is ensured, and the motor performance is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of iron core stacking tooling, and in particular relates to a self-adhesive iron core stacking tooling. Background Art

[0002] Stator core assembly is a critical step in motor manufacturing. In a motor, the stator is the stationary component, while the rotor is the rotating part. The stator core, the skeleton of the motor stator, is typically constructed from stacked silicon steel sheets. These sheets are cut into specific shapes and stacked together in a specific order and pattern to form a single stator core. The purpose of stacking the silicon steel sheets is to reduce eddy current and hysteresis losses generated during motor operation, thereby improving motor efficiency. Insulating varnish is typically applied between the sheets to prevent short circuits. Once stacked, the stator core forms a uniform magnetic circuit, providing the necessary magnetic field conditions for motor operation.

[0003] In actual production, the stator core stacking process requires precise control to ensure motor performance and reliability. However, existing core stacking tooling suffers from low precision and poor bonding between stacked laminations, seriously impacting subsequent motor performance and reliability. Utility Model Content

[0004] The utility model provides a self-adhesive iron core stacking tool to solve the problem mentioned in the above background technology that the existing iron core stacking tool cannot meet the stacking accuracy and bonding firmness between laminations.

[0005] The technical solution adopted by the utility model is: a self-adhesive iron core stacking tool, including an iron core base, an isolation sheet and an iron core pressure plate made by wire cutting, an iron core shaft core made by centerless grinding is fixedly installed at the center of the iron core base, one end of the iron core shaft core extends toward the outside of the iron core base, and a plurality of isolation sheets and stator punchings are sleeved and installed on the iron core shaft core, and an iron core pressure plate is installed at the other end of the iron core shaft core, and the iron core pressure plate is fixedly connected to the iron core base for high-voltage stacking of the stator punchings located between the two.

[0006] Preferably, there are four spacers between the core base and the core pressure plate, one of which is in contact with the core base, another is in contact with the core pressure plate, and the remaining two are stacked in sequence and located in the middle of the multiple stator punching sheets.

[0007] Preferably, a plurality of positioning pin mounting holes are evenly distributed on the surface of the core base, core pressure plate and isolation piece. The positioning pin mounting holes on the core base, core pressure plate and isolation piece correspond to each other and are installed with core positioning pins made by wire cutting.

[0008] Preferably, there are three core locating pins.

[0009] Preferably, the surfaces of the core base, the core pressure plate and the isolation piece are all provided with first blade mounting grooves connected to their respective center holes.

[0010] Preferably, the outer wall of the core shaft is provided with a second blade installation groove along its axial direction by wire cutting, the first blade installation groove and the second blade installation groove are positioned corresponding to each other, and a positioning blade is installed in the rectangular groove formed by the two.

[0011] Preferably, the core pressure plate is connected to the core base via compression bolts.

[0012] Preferably, the core base and the core shaft are fixedly connected by heat-shrink fitting.

[0013] The beneficial effects of the utility model are:

[0014] The utility model has a simple design structure and is easy to use. The iron core base, iron core pressure plate and isolation plate structure are made by wire cutting, and the iron core shaft core is made by high-precision centerless grinding. The stacking accuracy of the stator punchings can be improved during the stacking process, and the stator punchings can be pressed together under the action of the tightening bolts to ensure the firmness of the subsequent bonding of the stacking sheets, which is beneficial to improving the performance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 It is a top view of the utility model;

[0017] Figure 3 It is a plan view of the core base of the utility model;

[0018] Figure 4 A three-dimensional diagram of the iron core of the utility model;

[0019] Figure 5 It is a plan view of the isolation sheet of the utility model.

[0020] Among them: 1. Core base; 2. Spacer; 3. Stator punching sheet; 4. Core shaft core; 5. Core pressure plate; 6. Clamping bolt; 7. Positioning blade; 8. Core positioning pin; 9. First blade mounting slot; 10. Positioning pin mounting hole; 11. Second blade mounting slot. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] As shown in the figure, a self-adhesive core stacking tool includes a core base 1, a spacer 2, and a core pressure plate 5 made by wire cutting. The center of the core base 1 is fixedly mounted with a core shaft core 4 made by centerless grinding. The core shaft core 4 is finely ground by centerless grinding to an accuracy of 0.02mm, which can improve the coaxiality of the stator punching sheets 3 during the stacking process and improve the accuracy. Specifically, the core base 1 and the core shaft core 4 are fixedly connected by heat shrinking, which can improve the stability of the connection between the two.

[0023] One end of the core shaft core 4 extends toward the outside of the core base 1, and a number of isolation plates 2 and stator punching sheets 3 are sleeved and installed on the core shaft core 4. A core pressure plate 5 is installed at the other end of the core shaft core 4. The core pressure plate 5 is fixedly connected to the core base 1 and is used to stack the stator punching sheets 3 located between the two at high voltage.

[0024] Specifically, if Figure 1 As shown, there are four isolation sheets 2 between the core base 1 and the core pressure plate 5, one isolation sheet 2 is in contact with the core base 1, another isolation sheet 2 is in contact with the core pressure plate 5, and the remaining two isolation sheets 2 are stacked in sequence and are located in the middle of multiple stator punching sheets 3. The isolation sheets 2 are mainly used for insulation, reducing eddy current loss, and uniform magnetic field.

[0025] Specifically, a plurality of positioning pin mounting holes 10 are evenly distributed on the surface of the core base 1, the core pressure plate 5 and the isolation piece 2. The positioning pin mounting holes 10 on the core base 1, the core pressure plate 5 and the isolation piece 2 correspond to each other and are installed with core positioning pins 8 made by wire cutting. There are three core positioning pins 8, among which the core positioning pins 8 are used to further improve the accuracy of stacking the stator punching sheets 3 while ensuring that the adjacent stator punching sheets 3 are coaxial, so as to avoid problems such as shaking and displacement between each other.

[0026] Specifically, the surfaces of the core base 1 , the core pressure plate 5 and the spacer 2 are all provided with first blade mounting grooves 9 that are connected to their respective center holes.

[0027] Specifically, the outer wall of the core shaft core 4 is provided with a second blade installation groove 11 opened by wire cutting along its axial direction, the first blade installation groove 9 and the second blade installation groove 11 are positioned corresponding to each other, and a positioning blade 7 is installed in the rectangular groove formed by the two; Figure 2 As shown, the positioning blade 7 passes through the first blade installation slot 9 and the second blade installation slot 11 at the same time, the purpose of which is to prevent the stator punching 3 from rotating relative to the iron core 4, and further improve the stacking accuracy.

[0028] Specifically, the core pressure plate 5 is connected to the core base 1 through a tightening bolt 6. Since the stator punching sheet 3 is a self-adhesive silicon steel sheet, high temperature and high pressure conditions are required when stacking. Therefore, the core pressure plate 5 is connected to the core base 1 by a tightening bolt 6, which can meet the purpose of high pressure.

[0029] When using this self-adhesive core stacking tool, after the core shaft core 4 equipped with the positioning blade 7 is installed into the core base 1, the core positioning pins 8 are inserted into the core base 1 in turn and fixed firmly. Then, an isolation piece 2 is installed on the core shaft core 4 and the position of the core positioning pin 8 is installed into the core base 1, and then the stator punching sheet 3 is put on the core shaft core 4 in turn. After two isolation pieces 2 are installed in the middle, the stator punching sheet 3 is continued to be installed, and then the last isolation piece 2 is installed. Then the core pressure plate 5 is installed on the upper end of the core shaft core 4, and the bolts are passed through the core pressure plate 5 and threadedly connected to the core base 1 to complete the assembly and locking of the tool. The locked stator core is placed in an oven. After drying and curing, the tool is disassembled and the isolation piece 2 on the stator core is separated to complete the entire working process.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A self-adhesive core stacking tool, characterized by: The invention comprises an iron core base (1), an isolating sheet (2) and an iron core pressure plate (5) manufactured by a wire cutting method, wherein an iron core shaft core (4) manufactured by a centerless grinding method is fixedly installed at the center of the iron core base (1), one end of the iron core shaft core (4) extends toward the outside of the iron core base (1), and a plurality of isolating sheets (2) and stator punching sheets (3) are sleeved and installed on the iron core shaft core (4), and an iron core pressure plate (5) is installed at the other end of the iron core shaft core (4), and the iron core pressure plate (5) is fixedly connected to the iron core base (1) for high-voltage stacking of the stator punching sheets (3) located between the two.

2. The self-adhesive core stacking tool according to claim 1, characterized in that: There are four spacers (2) between the core base (1) and the core pressure plate (5), one of which is in contact with the core base (1), another is in contact with the core pressure plate (5), and the remaining two are stacked in sequence and located in the middle of the plurality of stator punching sheets (3).

3. The self-adhesive core stacking tool according to claim 1, characterized in that: A plurality of positioning pin mounting holes (10) are evenly distributed on the surfaces of the core base (1), the core pressure plate (5) and the isolation plate (2); the positioning pin mounting holes (10) on the core base (1), the core pressure plate (5) and the isolation plate (2) correspond to each other and are installed with core positioning pins (8) manufactured by wire cutting.

4. The self-adhesive core stacking tool according to claim 3, characterized in that: The number of the core positioning pins (8) is three.

5. The self-adhesive core stacking tool according to claim 1, characterized in that: The surfaces of the core base (1), the core pressure plate (5) and the isolation plate (2) are all provided with first blade mounting grooves (9) that are connected to their respective center holes.

6. The self-adhesive core stacking tool according to claim 5, characterized in that: The outer wall of the core shaft (4) is provided with a second blade installation groove (11) along its axial direction, which is opened by wire cutting. The first blade installation groove (9) and the second blade installation groove (11) correspond to each other in position, and a positioning blade (7) is installed in the rectangular groove formed by the first and second blade installation grooves.

7. The self-adhesive core stacking tool according to claim 1, characterized in that: The core pressure plate (5) is connected to the core base (1) via a tightening bolt (6).

8. The self-adhesive core stacking tool according to claim 1, characterized in that: The iron core base (1) and the iron core shaft core (4) are fixedly connected by heat-fitting.

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