An auxiliary tool for preventing residual paint in the inner hole of a stator during stator paint immersion

Abstract

The utility model belongs to motor processing equipment field especially, and is especially related to a kind of auxiliary tool for preventing residual paint in stator bore when stator is dipped in paint, including main body architecture and replaceable nylon stick, main body architecture is used to place stator and facilitate hoisting stator into paint dipping device, replaceable nylon stick is separately arranged with main body architecture, replaceable nylon stick and stator bore form interference fit seal, the length of replaceable nylon stick is greater than the length of stator core, for completely plugging stator bore;The utility model can close stator bore when dipping in paint, avoid insulation paint infiltration, so as to save subsequent cleaning process.

Description

Technical Field

[0001] This utility model belongs to the field of motor processing equipment, and in particular relates to an auxiliary tooling for preventing residual paint from remaining in the inner hole of the stator during stator impregnation. Background Technology

[0002] In the production process of magnetic levitation motors, the stator is the core component. The stator includes an iron core and windings. The windings are coils, which generally extend from the iron core at both ends.

[0003] In the production and processing of magnetic levitation motors, stator impregnation is an essential step. It can improve the insulation strength and moisture resistance of the windings, as well as the heat resistance and heat dissipation of the windings. It can also improve the mechanical properties and chemical stability of the winding insulation. The quality of stator impregnation directly affects the temperature rise and service life of the magnetic levitation motor.

[0004] However, the existing impregnation process has the following problems:

[0005] 1. After impregnation, insulating varnish is easily left in the inner hole of the stator, which requires secondary cleaning by air mill or electric mill, which is inefficient and difficult to completely remove;

[0006] 2. Manual cleaning requires high technical skills from operators, and long-term operation is harmful to health;

[0007] 3. Residual paint can affect the dimensional accuracy of the stator's inner hole, potentially leading to poor motor assembly.

[0008] However, existing technologies lack specialized tooling to directly prevent residual paint in the stator's inner bore during the impregnation process. Utility Model Content

[0009] To address the aforementioned problems, this utility model provides a simple and reusable auxiliary tooling for preventing residual varnish from remaining in the inner hole of the stator during stator impregnation. This tooling can seal the inner hole of the stator during impregnation, preventing the insulating varnish from seeping in, thereby eliminating the need for subsequent cleaning procedures.

[0010] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0011] An auxiliary tooling for preventing residual paint from remaining in the inner hole of a stator during stator impregnation includes a main frame and a replaceable nylon rod. The main frame is used to place the stator and facilitate the hoisting of the stator into the impregnation device. The replaceable nylon rod is separately set from the main frame and forms an interference fit seal with the inner hole of the stator. The length of the replaceable nylon rod is greater than the length of the stator core, and it is used to completely seal the inner hole of the stator.

[0012] The following are further optimizations of the above technical solution by this utility model:

[0013] The replaceable nylon rod insertion end is provided with a guide cone surface.

[0014] Further optimization: An annular protrusion is provided on the outer wall of the other end of the replaceable nylon rod.

[0015] Further optimization: The length of the replaceable nylon rod is 10mm-15mm longer than the length of the stator core.

[0016] Further optimization: The main structure includes two annular outer frames facing each other, and at least six support legs are fixedly arranged at equal intervals between the two annular outer frames.

[0017] Further optimization: Multiple support rings with successively decreasing diameters are concentrically arranged within one of the annular outer frames, and at least four connecting rods are evenly spaced between adjacent support rings and between the annular outer frame and the corresponding support rings.

[0018] Further optimization: All connecting rods extend radially along the annular outer frame.

[0019] Further optimization: The edges of the annular protrusion are rounded.

[0020] Further optimization: The annular protrusion of the replaceable nylon rod is provided with anti-slip texture.

[0021] Further optimization: The heat distortion temperature of the replaceable nylon rod is not less than 1.2 times the temperature of the impregnation process.

[0022] This invention uses an interference fit between a replaceable nylon rod and the stator inner hole to form a reliable barrier through close physical contact, effectively preventing paint from seeping into the inner hole. At the same time, the length of the replaceable nylon rod is greater than that of the stator core, achieving complete sealing of both ends of the stator inner hole, preventing residual paint from entering, ensuring that the internal structure such as the stator winding is not contaminated, and significantly improving the electrical performance and product qualification rate of the stator after varnishing.

[0023] This invention features a replaceable nylon rod that is separated from the main structure. This modular design enhances the adaptability of the tooling, allowing companies to adapt to different stators without replacing the entire tooling set. They only need to replace the replaceable nylon rod of the corresponding size, significantly reducing the variety of tooling and inventory pressure, and lowering procurement costs. In addition, the replaceable nylon rod, being a consumable part, can be replaced individually after wear, eliminating the need for maintenance of the main structure. This effectively reduces maintenance costs, extends the overall service life of the tooling, and improves the economic efficiency of enterprise production.

[0024] By adopting the above technical solution, this utility model can seal the inner hole of the stator during varnish impregnation, preventing the insulating varnish from seeping in, thereby eliminating the need for subsequent cleaning procedures.

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0028] Figure 2 This is a schematic diagram of the overall structure from another angle of an embodiment of the present utility model;

[0029] In the diagram: 1-Main structure; 11-Ring outer frame; 12-Support leg; 13-Support ring; 14-Connecting rod; 2-Replaceable nylon rod; 3-Guide cone surface; 4-Ring protrusion. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] like Figure 1-2 As shown, an auxiliary tooling for preventing residual paint from remaining in the inner hole of a stator during stator impregnation includes a main frame 1 and a replaceable nylon rod 2. The main frame 1 is used to place the stator and facilitate the hoisting of the stator into the impregnation device. The replaceable nylon rod 2 is separately set from the main frame 1. The replaceable nylon rod 2 forms an interference fit seal with the inner hole of the stator. The length of the replaceable nylon rod 2 is greater than the length of the stator core, and it is used to completely seal the inner hole of the stator.

[0032] This design, firstly, allows for an interference fit seal between the replaceable nylon rod 2 and the stator inner bore, forming a reliable barrier through tight physical contact, effectively preventing paint from seeping into the inner bore; secondly, the replaceable nylon rod 2 is longer than the stator core, achieving complete sealing of both ends of the stator inner bore, preventing residual paint from entering, ensuring that the internal structures such as the stator windings are not contaminated, and significantly improving the electrical performance and product qualification rate of the stator after varnishing.

[0033] Secondly, the replaceable nylon rod 2 is separated from the main frame 1. This split design improves the tooling's adaptability, so that when faced with stators of different specifications, enterprises do not need to replace the entire tooling set. They only need to replace the replaceable nylon rod 2 of the corresponding size to complete the adaptation, which greatly reduces the types of tooling and inventory pressure, and lowers procurement costs. In addition, the replaceable nylon rod 2 is a consumable part. After wear, it can be replaced separately without the need to maintain the main frame 1, which effectively reduces maintenance costs, extends the overall service life of the tooling, and improves the enterprise's production economy.

[0034] The heat distortion temperature of the replaceable nylon rod 2 is not less than 1.2 times the temperature of the impregnation process.

[0035] In this embodiment, the replaceable nylon rod is made of high-temperature resistant engineering plastic, preferably a nylon-based material (such as PA66-GF30). It must meet the following process adaptability requirements: heat distortion temperature ≥180℃ (ASTM D648); solvent resistance to insulating varnish: after immersion in epoxy insulating varnish at 150℃ for 2 hours, the mass change rate is ≤0.5%; hardness ≥80 Shore D (ensuring interference fit without deformation).

[0036] The length of the replaceable nylon rod 2 is 10mm-15mm longer than the length of the stator core.

[0037] Preferably, the length of the replaceable nylon rod 2 is 12mm longer than the length of the stator core, and its sealing performance can meet the usage requirements. However, considering cost and effect, when the length of the replaceable nylon rod 2 is 12mm longer than the length of the stator core, its performance meets the usage requirements, the cost is lower, and it meets the production requirements.

[0038] The replaceable nylon rod 2 has a guide cone 3 at its insertion end. The cone angle of the guide cone 3 is 15°-30° and the cone length is 10mm-20mm.

[0039] Preferably, the guide cone 3 has a cone angle of 20° and a cone length of 15mm. This structural design not only significantly reduces insertion resistance but also enables rapid and accurate alignment. At the same time, it effectively balances stress distribution, fully protecting the inner wall of the stator and significantly extending the service life of the replaceable nylon rod 2. While ensuring sealing performance, the overall cost-effectiveness is significantly improved.

[0040] The other end of the replaceable nylon rod 2 is provided with an annular protrusion 4, the height of which is 5mm-10mm.

[0041] This design, firstly, provides the operator with a clear and suitable gripping area by the annular protrusion 4. Compared with the smooth rod body, it increases the contact area and friction between the hand and the replaceable nylon rod 2, making it easier and more secure to apply force when installing and removing the replaceable nylon rod 2, avoiding slippage. Especially in working conditions where paint may be present and the surface may be slippery, it can also ensure smooth operation and greatly improve assembly efficiency.

[0042] Secondly, when the replaceable nylon rod 2 is inserted into the stator inner hole to form an interference fit, the annular protrusion 4 can act as a limiting structure to prevent the replaceable nylon rod 2 from being over-inserted into the stator inner hole, ensuring that it is accurately installed in place and maintaining the reliability of the sealing effect. At the same time, during the impregnation process, the annular protrusion 4 can help disperse the pressure of the stator on the replaceable nylon rod 2, preventing the replaceable nylon rod 2 from shifting due to uneven force, and ensuring the effectiveness of the sealing protection.

[0043] Furthermore, the annular protrusion 4 makes the replaceable nylon rod 2 structure more easily identifiable. During routine maintenance and replacement of the tooling, it is convenient to quickly identify and distinguish the replaceable nylon rods 2 of different specifications. It is also convenient to check whether there are problems such as wear or deformation of the protrusion, to detect potential faults in time, reduce the risk of production accidents caused by tooling damage, reduce equipment downtime, and reduce maintenance costs.

[0044] Preferably, the height of the annular protrusion 4 is 8mm, which provides sufficient grip to ensure that it does not slip during disassembly and assembly, without excessively increasing the amount of material used.

[0045] The edges of the annular protrusion 4 are rounded.

[0046] This design eliminates sharp edges to prevent scratches to operators and ensure operational safety; it also reduces stress concentration during collisions, preventing damage to tooling and stator and extending service life; and it optimizes the grip feel, making it easier to control the operation of the replaceable nylon rod 2, thus improving the convenience and accuracy of assembly.

[0047] In this embodiment, the radius of the rounded corner transition is 0.5mm-1mm.

[0048] The main structure 1 includes two annular outer frames 11 arranged opposite each other, and at least six supporting legs 12 are fixedly arranged at equal intervals between the two annular outer frames 11.

[0049] In this embodiment, the number of support legs 12 is six.

[0050] In addition to this embodiment, the number of support legs 12 may be eight, ten, twelve, etc.

[0051] One of the annular outer frames 11 is concentrically provided with multiple support rings 13 of successively decreasing diameter, and at least four connecting rods 14 are equally spaced between adjacent support rings 13 and between the annular outer frame 11 and the corresponding support ring 13.

[0052] In this embodiment, there are four connecting rods 14.

[0053] In addition to this embodiment, the number of connecting rods 14 can be five, six, seven, eight, etc.

[0054] All connecting rods 14 extend radially along the annular outer frame 11.

[0055] This design, firstly, uses two opposing annular outer frames 11 in conjunction with at least six equally spaced support legs 12 to form a stable three-dimensional frame structure. This structure can evenly distribute the weight of the stator during hoisting, preventing the tooling from tilting, deforming, or even the stator from falling off due to uneven stress, thus ensuring a safe and stable hoisting process.

[0056] Secondly, the multiple concentric support rings 13 with decreasing diameters inside the annular outer frame 11, along with at least four radially extending connecting rods 14, can support stators of different outer diameters.

[0057] The interference fit between the replaceable nylon rod 2 and the stator inner hole is 0.1mm-0.3mm.

[0058] This design ensures that, firstly, the interference fit within this range allows the nylon rod to fit tightly against the stator's inner hole, effectively preventing the paint from entering the stator's inner hole during the impregnation process and preventing residual paint from remaining, thus ensuring that the stator's insulation and electrical performance are not affected.

[0059] Secondly, the interference fit ensures the pressure required for sealing without excessively compressing the inner surface of the stator due to excessive interference, thus avoiding damage and deformation of the inner surface and protecting the mechanical precision and integrity of the stator.

[0060] Furthermore, the 0.1mm-0.3mm interference fit means that the replaceable nylon rod 2 can be installed by hand without excessive hammering or the use of special tools. It is also relatively easy to disassemble, and there will be no situation where the replaceable nylon rod 2 gets stuck in the stator inner hole, which improves the ease of use of the tooling and work efficiency.

[0061] Finally, the reasonable interference fit ensures that the replaceable nylon rod 2 will not undergo plastic deformation or fatigue damage due to excessive compression during operation, thus extending the service life of the replaceable nylon rod 2 and reducing the cost of tooling.

[0062] The radial distance between adjacent support rings 13 is 10-15 mm.

[0063] This design ensures that the spacing provides sufficient space between the support rings 13 for installing the connecting rods 14, while also allowing the connecting rods 14 to have appropriate length and angle to connect to the support rings 13. This makes the entire tooling structure a stable whole, thus evenly distributing the weight and external force of the stator during placement and hoisting, avoiding structural instability caused by excessively large or small spacing, and enhancing the load-bearing capacity and reliability of the tooling.

[0064] Secondly, the appropriate spacing facilitates the flow and circulation of the paint during the impregnation process. The paint can flow more smoothly between the support rings 13, better cover the stator surface, and improve the uniformity and quality of the impregnation. At the same time, it also makes it easier to drain excess paint after impregnation, reduce paint residue on the tooling, and help keep the tooling clean and ready for the next use.

[0065] The replaceable nylon rod 2 has annular protrusions 4 with anti-slip textures, the depth of which is 0.5mm-1mm.

[0066] This design, firstly, increases the surface roughness by increasing the anti-slip texture, significantly enhancing the friction between the hand and the replaceable nylon rod 2. Even if the operator's hands are stained with paint or in a wet environment, they can still hold the rod firmly, preventing it from accidentally slipping and injuring their feet or damaging the stator or tooling, thus reducing the risk of safety accidents.

[0067] Secondly, the stable grip allows operators to apply force more precisely and efficiently when installing and removing the replaceable nylon rod 2, reducing repetitive operations and time waste caused by slippage; especially in assembly line operations, it can significantly improve the overall assembly speed and ensure the continuity of the dipping process.

[0068] Furthermore, the anti-slip texture ensures that the replaceable nylon rod 2 remains stable during operation, preventing collisions and friction caused by slippage, avoiding damage to the surface of the replaceable nylon rod 2, the inner hole of the stator, and other parts of the tooling, extending the service life of the tooling, while ensuring that the accuracy of the inner hole of the stator is not affected and maintaining the varnish sealing effect.

[0069] Finally, a reasonable texture depth of 0.5mm-1mm ensures anti-slip performance while avoiding localized stress concentration on the replaceable nylon rod 2 due to excessively deep texture, which could accelerate wear or breakage. This ensures that the anti-slip function remains effective during long-term use and reduces the frequency of tooling maintenance and replacement.

[0070] Using the above-mentioned auxiliary tooling for preventing residual paint from remaining in the inner hole of the stator during stator impregnation, the stator impregnation steps are as follows:

[0071] Step 1: Insert the replaceable nylon rod 2 into the stator inner hole;

[0072] Step 2: Place the stator equipped with nylon rods on the main frame 1;

[0073] Step 3: Transfer the main structure 1 and the stator as a whole to the impregnation unit using hoisting equipment;

[0074] Step 4: Perform impregnation treatment;

[0075] Step 5: Remove the tooling after the paint dipping is complete.

[0076] For those skilled in the art, any changes, modifications, substitutions, and variations made to the implementation methods without departing from the principles and spirit of this utility model, based on the teachings of this utility model, still fall within the protection scope of this utility model.

Claims

1. An auxiliary tooling for preventing residual paint from remaining in the inner hole of a stator during stator impregnation, characterized in that: It includes a main frame (1) and a replaceable nylon rod (2). The main frame (1) is used to place the stator and facilitate the hoisting of the stator into the impregnation device. The replaceable nylon rod (2) is set separately from the main frame (1). The replaceable nylon rod (2) forms an interference fit seal with the inner hole of the stator. The length of the replaceable nylon rod (2) is greater than the length of the stator core and is used to completely seal the inner hole of the stator.

2. The auxiliary tooling for preventing residual paint from remaining in the inner hole of the stator during stator impregnation as described in claim 1, characterized in that: The insertion end of the replaceable nylon rod (2) is provided with a guide cone surface (3).

3. The auxiliary tooling for preventing residual paint from remaining in the inner hole of the stator during stator impregnation according to claim 2, characterized in that: The other end of the replaceable nylon rod (2) has an annular protrusion (4) on its outer side wall.

4. The auxiliary tooling for preventing residual paint from remaining in the inner hole of the stator during stator impregnation as described in claim 1, characterized in that: The length of the replaceable nylon rod (2) is 10mm-15mm longer than the length of the stator core.

5. The auxiliary tooling for preventing residual paint from remaining in the inner hole of the stator during stator impregnation according to claim 1, characterized in that: The main structure (1) includes two annular outer frames (11) facing each other, and at least six support legs (12) are fixedly arranged at equal intervals between the two annular outer frames (11).

6. An auxiliary tooling for preventing residual paint from remaining in the inner hole of the stator during stator impregnation, as described in claim 5, is characterized in that: Multiple support rings (13) with decreasing diameters are concentrically arranged inside one of the annular outer frames (11). At least four connecting rods (14) are evenly spaced between adjacent support rings (13) and between the annular outer frame (11) and the corresponding support ring (13).

7. An auxiliary tooling for preventing residual paint from remaining in the inner hole of the stator during stator impregnation, as described in claim 6, is characterized in that: The connecting rods (14) all extend radially along the annular outer frame (11).

8. An auxiliary tooling for preventing residual paint from remaining in the inner hole of the stator during stator impregnation, as described in claim 3, is characterized in that: The edges of the annular protrusion (4) are rounded.

9. An auxiliary tooling for preventing residual paint from remaining in the inner hole of the stator during stator impregnation, as described in claim 3, characterized in that: The annular protrusion (4) of the replaceable nylon rod (2) is provided with anti-slip texture.

10. An auxiliary tooling for preventing residual paint from remaining in the inner hole of a stator during stator impregnation, as described in any one of claims 1-9, characterized in that: The heat distortion temperature of the replaceable nylon rod (2) is not less than 1.2 times the temperature of the impregnation process.

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