A magnetic steel sheet glue injection gap filling device

Abstract

The utility model relates to a kind of magnetic steel piece glue injection caulking devices, with cover and body, the position of glue inlet and glue supplement groove is consistent with the gap position on magnetic steel piece, the shape of glue injection cavity is consistent with the shape of magnetic steel piece, when magnetic steel piece is placed, it is close to the inner wall of glue injection cavity, the bottom of glue injection cavity is vacuum extraction mouth, magnetic steel piece glue injection caulking device, lower portion is equipped with vacuum generator, vacuum generator is connected with the vacuum extraction mouth of body lower portion, trigger switch is mounted on the vacuum generator.The utility model is set in correspondence with the gap on magnetic steel piece in glue inlet, the shape of magnetic steel piece is consistent with glue injection cavity, glue can be accurately introduced into the gap on magnetic steel piece, the setting of glue supplement groove increases the entering surface of glue into gap, so that glue can be fully filled gap, glue will not be wasted, also can avoid glue pollution magnetic steel piece surface, save subsequent cleaning work on magnetic steel piece surface, save labor.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing technology, and in particular to a device for injecting glue and filling gaps in magnetic steel sheets. Background Technology

[0002] Most permanent magnet motors today use fractional slot windings. Fractional slot windings inevitably introduce more harmonic components, which cause eddy current losses in the motor rotor. At lower speeds, because the harmonic frequencies are not high, eddy current damage is still within a controllable range. However, as the power density requirements of motors increase, the motor speed also increases, leading to very large eddy current damage, which can easily cause high-temperature demagnetization of the motor rotor magnets.

[0003] To address rotor demagnetization, rotors with built-in magnets typically employ a method of dividing the magnets into smaller pieces and inserting them into the rotor core. This significantly reduces eddy current losses. For surface-mounted magnets, the process typically involves rough machining to cut the magnets into smaller pieces, then gluing them together to form a larger block, followed by precision machining. This not only significantly increases material consumption but also incurs substantial processing costs, leading to a substantial increase in magnet prices. Generally, segmenting magnets of the same volume and shape increases the overall cost by 50% or more. To solve this problem, analysis and simulation of rotor eddy current losses revealed that a large portion of the eddy current losses are distributed at the edges of the magnets, while the losses in the center are smaller. Based on this finding, a method of cutting slits around large sections of magnets (such as...) was designed. Figure 1 As shown in the figure, this method reduces eddy current losses. By appropriately increasing the number of slits, it can even achieve or exceed the effect of bonding after complete separation. Moreover, it does not increase the consumption of magnetic steel material at all.

[0004] However, this method brings a new problem: the overall mechanical strength of the magnet is significantly reduced. It is easy to break during the magnetization and bonding process of the magnet to the rotor, and the overall strength of the rotor is also reduced. In order to restore the original strength of the magnet, high-strength, high-temperature resistant glue must be filled into the cut gaps and cured.

[0005] Initially, a method was used to immerse batches of magnets in glue buckets, followed by vacuuming the buckets in a vacuum chamber. However, this method had two major drawbacks: First, it was very difficult to operate. The glue was highly viscous, and after immersing the magnets, their entire outer surface was covered in glue, requiring extensive manual removal. This resulted in significant glue waste and environmental pollution, leading to a substantial increase in production costs. Second, due to the high viscosity of the high-temperature glue, even with preheating of the magnets and glue, the overall vacuuming method made it difficult to ensure that all air was expelled from the gaps. Subsequent sampling revealed that the overall filling rate was only about 80%. Utility Model Content

[0006] To address the aforementioned problems, the purpose of this utility model is to provide a magnetic steel sheet glue injection and caulking device that can accurately and fully inject glue into the cut magnetic steel sheet without wasting glue, contaminating the surface of the magnetic steel sheet, and saving the labor required for cleaning.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a magnetic steel sheet gluing and filling device, comprising a cover plate, a body, and a vacuum generator. The body is provided with a docking platform, which is sealed to the cover plate. A positioning mechanism is provided between the docking platform and the cover plate. The body is provided with a gluing cavity. The cover plate is provided with multiple gluing inlets above the gluing cavity. The inner wall of the gluing cavity is provided with a sheet placement step. The position of the gluing inlets is consistent with the position of the gap on the magnetic steel sheet. The shape of the gluing cavity is consistent with the shape of the magnetic steel sheet. When the magnetic steel sheet is placed, it is tightly attached to the inner wall of the gluing cavity. The bottom of the gluing cavity has a vacuum port. The vacuum generator is connected to the vacuum port at the bottom of the body.

[0008] In the above technical solution, the positioning mechanism consists of a positioning hole on the cover plate and a positioning boss on the docking platform, wherein the positioning boss can be engaged into the positioning hole.

[0009] In the above technical solution, the main body is provided with a glue injection cavity, and the cover plate is provided with a glue storage baffle at the outer periphery of the glue inlet.

[0010] In the above technical solution, the main body is provided with multiple glue injection cavities, and the cover plate is provided with glue storage tanks at the corresponding positions of each glue injection cavity. The cover plate is provided with glue storage baffles at the outer periphery of the docking platform.

[0011] In the above technical solution, multiple glue-filling grooves are provided on the two sides of the plate-laying steps, and the positions of the glue-filling grooves are consistent with the gap positions on the magnetic steel sheet.

[0012] In the above technical solution, the vacuum generator is equipped with a trigger switch, which is a foot switch.

[0013] In the above technical solution, the vacuum generator is equipped with a silencer.

[0014] In summary, the advantages of using the technical solution of this utility model compared to traditional technical means are as follows:

[0015] In this invention, the glue injection cavity on the main body is sealed by the sealing connection between the main body and the cover plate, forming a sealed space with only the glue inlet and the vacuum port remaining. The glue inlet is set to correspond to the gap on the magnetic steel sheet, and the shape of the magnetic steel sheet is consistent with the glue injection cavity. The glue can be accurately introduced into the gap on the magnetic steel sheet. In this way, the magnetic steel sheet is fully injected with glue without wasting glue, and glue contamination of the surface of the magnetic steel sheet is also avoided, eliminating the need for subsequent cleaning of the surface of the magnetic steel sheet and saving labor. Attached Figure Description

[0016] The foregoing and other objects, features and advantages of this invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the magnetic steel sheet;

[0018] Figure 2 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of Embodiment 2 of the present invention;

[0020] Figure 4 This is a schematic diagram of the main structure of the present invention in its usage state;

[0021] Figure 5 This is a three-dimensional structural diagram of the present invention in use.

[0022] The following are the labels: 100, cover plate; 110, glue inlet; 120, glue storage barrier; 130, glue storage tank; 200, body; 210, docking platform; 130, positioning mechanism; 310, positioning hole; 320, positioning boss; 400, glue injection cavity; 410, film placement step; 420, glue replenishment tank; 430, vacuum port; 500, vacuum generator; 600, trigger switch; 700, silencer; 800, magnet; 810, gap. Detailed Implementation

[0023] Based on the preferred embodiments of this utility model, and through the following description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

[0024] The present invention will be further described with reference to the following figures:

[0025] Example 1:

[0026] like Figure 2As shown, a magnetic steel sheet glue injection and caulking device includes a cover plate 100, a body 200, and a vacuum generator 500. The body 200 has a docking platform 210, which is sealed to the cover plate 100. A positioning mechanism 130 is provided between the docking platform 210 and the cover plate 100. The body 200 has a glue injection cavity 400. Multiple glue inlets 110 are located above the glue injection cavity 400 on the cover plate 100. The glue injection cavity 400 contains... The wall is provided with a plate placement step 410, and multiple glue filling grooves 420 are provided on the plate placement steps 410 on both sides. The positions of the glue inlet 110 and the glue filling grooves 420 are consistent with the positions of the gaps 810 on the magnetic steel sheet 800. The shape of the glue injection cavity 400 is consistent with the shape of the magnetic steel sheet 800. When the magnetic steel sheet 800 is placed, it is tightly attached to the inner wall of the glue injection cavity 400. The bottom of the glue injection cavity 400 has a vacuum port 430, and the vacuum generator 500 is connected to the vacuum port 430 at the bottom of the main body 200.

[0027] The positioning mechanism 130 consists of a positioning hole 310 on the cover plate 100 and a positioning boss 320 on the body 200. The positioning boss 320 can be engaged in the positioning hole 310.

[0028] The main body 200 is provided with a glue injection cavity 400, and the cover plate 100 is provided with a glue storage baffle 120 at the outer periphery of the glue inlet 110. The glue storage baffle 120 can store a certain amount of glue, avoid frequent glue addition, and effectively improve glue injection efficiency.

[0029] like Figure 2 As shown, multiple glue-filling grooves 420 are provided on the two sides of the plate-laying steps 410. The positions of the glue-filling grooves 420 are consistent with the positions of the gaps 810 on the magnet plate 800. The glue-filling grooves 420 allow the glue to enter the gaps 810 from the side of the magnet plate 800, increasing the glue entry surface and allowing the glue to fully fill the gaps.

[0030] Example 2

[0031] like Figure 3As shown, a magnetic steel sheet glue injection and caulking device includes a cover plate 100, a body 200, and a vacuum generator 500. The body 200 has a docking platform 210, which is sealed to the cover plate 100. A positioning mechanism 130 is provided between the docking platform 210 and the cover plate 100. The body 200 has a glue injection cavity 400. Multiple glue inlets 110 are located above the glue injection cavity 400 on the cover plate 100. The glue injection cavity 400 contains... The wall is provided with a plate placement step 410, and multiple glue filling grooves 420 are provided on the plate placement steps 410 on both sides. The positions of the glue inlet 110 and the glue filling grooves 420 are consistent with the positions of the gaps 810 on the magnetic steel sheet 800. The shape of the glue injection cavity 400 is consistent with the shape of the magnetic steel sheet 800. When the magnetic steel sheet 800 is placed, it is tightly attached to the inner wall of the glue injection cavity 400. The bottom of the glue injection cavity 400 has a vacuum port 430, and the vacuum generator 500 is connected to the vacuum port 430 at the bottom of the main body 200.

[0032] The positioning mechanism 130 consists of a positioning hole 310 on the cover plate 100 and a positioning boss 320 on the body 200. The positioning boss 320 can be engaged in the positioning hole 310.

[0033] like Figure 3 As shown, multiple glue-filling grooves 420 are provided on the two sides of the plate-laying steps 410. The positions of the glue-filling grooves 420 are consistent with the positions of the gaps 810 on the magnet plate 800. The glue-filling grooves 420 allow the glue to enter the gaps 810 from the side of the magnet plate 800, increasing the glue entry surface and allowing the glue to fully fill the gaps 810.

[0034] like Figure 3 As shown, the main body 200 is provided with a plurality of glue injection cavities 400, and the cover plate 100 is provided with glue storage tanks 130 at the positions of each glue injection cavity 400. The cover plate 100 is provided with glue storage baffles 120 at the outer periphery of the docking platform 210.

[0035] like Figure 4 , 5 As shown, the vacuum generator 500 is equipped with a trigger switch 600, which is a foot switch, and the vacuum generator 500 is equipped with a silencer 700.

[0036] In use, the magnetic steel sheet 800 is first placed into the glue injection cavity 400, the cover plate 100 and the main body 200 are closed, glue is placed inside the glue storage barrier 120 of the cover plate 100, the vacuum generator 500 is turned on, and the glue is sucked into the glue injection cavity 400 through the glue inlet 110. The glue inlet 110 is directly aligned with the gap 810 of the magnetic steel sheet 800. In this way, the glue is attracted by air pressure and fills the gap 810 of the magnetic steel sheet 800. After the glue injection is completed, the magnetic steel sheet 800 can be removed.

[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A magnetic steel sheet adhesive injection and caulking device, characterized in that: The device comprises a cover plate, a main body, and a vacuum generator. The main body has a docking platform, which is sealed to the cover plate. A positioning mechanism is provided between the docking platform and the cover plate. The main body has a glue injection cavity. The cover plate has multiple glue inlets located above the glue injection cavity. The inner wall of the glue injection cavity has a plate placement step. The position of the glue inlets corresponds to the gap position on the magnetic steel sheet. The shape of the glue injection cavity corresponds to the shape of the magnetic steel sheet. When the magnetic steel sheet is placed, it fits tightly against the inner wall of the glue injection cavity. The bottom of the glue injection cavity has a vacuum port. The vacuum generator is connected to the vacuum port at the bottom of the main body.

2. The magnetic steel sheet adhesive injection and caulking device according to claim 1, characterized in that: The positioning mechanism consists of a positioning hole on the cover plate and a positioning boss on the docking platform, wherein the positioning boss can be engaged into the positioning hole.

3. The magnetic steel sheet adhesive injection and caulking device according to claim 1, characterized in that: The main body is provided with a glue injection cavity, and the cover plate is provided with a glue storage baffle at the outer periphery of the glue inlet.

4. The magnetic steel sheet adhesive injection and caulking device according to claim 1, characterized in that: The main body is provided with multiple glue injection cavities, and a glue storage tank is provided on the cover plate at the corresponding position of each glue injection cavity. A glue storage baffle is provided on the outer periphery of the cover plate at the docking platform.

5. The magnetic steel sheet adhesive injection and caulking device according to claim 1, characterized in that: Multiple glue-filling grooves are provided on the two sides of the plate-laying steps, and the positions of the glue-filling grooves are consistent with the gap positions on the magnetic steel sheet.

6. The magnetic steel sheet adhesive injection and caulking device according to claim 1, characterized in that: The vacuum generator is equipped with a trigger switch, which is a foot switch.

7. The magnetic steel sheet adhesive injection and caulking device according to claim 1, characterized in that: The vacuum generator is equipped with a silencer.

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