A waterproof potting tool for motors

Abstract

This utility model discloses a waterproof potting tool for an electric motor, comprising a potting mandrel made of PTFE material, including an upper tapered section, a middle straight section, and a lower tapered section formed sequentially; a blind hole extending from top to bottom along the axis of the cylinder, passing through the upper tapered section, the middle straight section, and ending at the lower tapered section; a flat bottom surface of the lower tapered section forming a fixing hole for fasteners to be inserted and fixed; and fasteners. In use, the potting mandrel is inserted into the motor, and the fasteners securely fix the potting mandrel to the motor. After the potting material is poured in and hardened, the fasteners are loosened, and the potting mandrel can be detached from the motor by cooling, causing it to shrink.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing, and in particular to a waterproof potting tool for motors. Background Technology

[0002] By encapsulating the stator inside the motor with epoxy resin, the motor can achieve low heat dissipation temperature, a bright and beautiful surface, and moisture-proof insulation. The method involves placing a fixture inside the motor, pouring in epoxy resin, and then using vibration to allow the epoxy resin to flow and fill the internal cavity. Therefore, the fixture must be firmly fixed inside the motor and cannot be displaced or deformed due to vibration. However, epoxy resin is a highly viscous substance with high bonding strength, and how to remove the fixture from the solidified epoxy resin is a problem that urgently needs to be solved. Utility Model Content

[0003] The present invention aims to at least partially solve one of the technical problems in the aforementioned technologies. Therefore, the purpose of this invention is to provide a waterproof potting fixture for motors that can be firmly fixed during potting and easily removed after molding.

[0004] To achieve the above objectives, embodiments of this utility model provide a waterproof potting fixture for motors, comprising:

[0005] The potting mandrel made of PTFE material includes an upper tapered section, a middle straight section and a lower tapered section formed in sequence; a blind hole is formed from top to bottom along the axis of the cylinder, passing through the upper tapered section, the middle straight section and ending at the lower tapered section; the bottom surface of the lower tapered section is flat, forming a fixing hole for fasteners to be inserted and fixed.

[0006] It also includes fasteners.

[0007] According to the embodiment of this utility model, the waterproof potting tool for motors is used by inserting the potting shaft into the motor and fastening the potting shaft to the motor. After the potting material is poured in and hardened, the fastening is loosened and the potting shaft is removed from the motor by tapping the fastening. Alternatively, the potting shaft can be shrunk by cooling and thus removed from the motor.

[0008] In addition, the waterproof potting fixture for motors proposed in the above embodiments of this utility model may also have the following additional technical features:

[0009] Optionally, the taper of the upper and lower taper sections is between 1:45 and 1:55.

[0010] Optionally, the cross-section of the blind hole is gear-shaped.

[0011] Optionally, a nut that mates with a fastener is provided at the bottom of the blind hole.

[0012] Optionally, a thread is formed in the fixing hole to mate with the fastener.

[0013] Optionally, it also includes a pull rod with a pull ring at the top and a threaded inner hole formed by the concave bottom surface of the pull rod. Fasteners pass through the fixing hole and engage with the threaded inner hole of the pull rod to fix the potting mandrel to the motor. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view according to an embodiment of the present invention;

[0015] Figure 2 This is a cross-sectional view according to another embodiment of the present invention;

[0016] Figure 3 This is a cross-sectional view according to the third embodiment of the present invention;

[0017] Figure 4 This is a cross-sectional view according to an embodiment of the present invention;

[0018] Figure 5 This is a cross-sectional schematic diagram of the present invention in use.

[0019] Label Explanation:

[0020] Encapsulation mandrel 1, upper tapered section 11, middle straight section 12, lower tapered section 13

[0021] Blind hole 2 Nut 3 Fastener 4

[0022] Pull rod 5, pull ring 51

[0023] Motor 100. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0025] When using this invention, the potting shaft is inserted into the motor, and fasteners are used to firmly fix the potting shaft to the motor. After the potting material is poured in and hardened, the fasteners are loosened, and the potting shaft is disengaged from the motor by tapping the fasteners. Alternatively, the potting shaft can be shrunk by cooling, thereby disengaging it from the motor.

[0026] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0027] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0028] Figures 1 to 5 A waterproof potting tool for a motor 100 according to an embodiment of the present utility model includes a potting mandrel 1 made of PTFE material, which is sequentially formed with an upper tapered section 11, a middle straight section 12 and a lower tapered section 13; the multi-segment tapered structure facilitates removal after potting. PTFE is polytetrafluoroethylene material, which does not adhere to epoxy resin, and is therefore suitable for use in this technical solution.

[0029] Specifically, the taper of the upper tapered section 11 and the lower tapered section 13 is between 1:45 and 1:55, so that there is no particularly obvious change in appearance, but it is easy to detach.

[0030] A blind hole 2 is formed along the axis of the column from top to bottom, passing through the upper tapered section 11, the middle straight section 12, and ending at the lower tapered section 13. One function of the blind hole 2 is to enable the entire potting mandrel 1 to have the ability to deform slightly in the radial direction, but not to deform easily. After potting, the mandrel needs to be pulled out from the motor 100. Therefore, how to pull it out conveniently is a technical problem. By setting this blind hole 2, the potting mandrel 1 is transformed from a solid structure to a partially hollow structure. When cooling methods are used, the material is guided to deform in the set direction, so as to achieve uniform shrinkage and extraction.

[0031] The method of using this utility model can be referred to the following steps:

[0032] 1. The potting mandrel 1 is fixed inside the motor 100 by fasteners 4;

[0033] 2. The heating motor 100 and the potting mandrel 1 are integrated, causing the potting mandrel 1 to expand and fit into the area inside the motor 100 where potting material does not need to enter;

[0034] 3. Pour in epoxy resin and vibrate under negative pressure to degas it;

[0035] 4. Remove the potting mandrel 1. The removal method can be cooling. Since the expansion coefficients of PTFE and the surrounding epoxy resin are different, when the temperature drops, the volume of the potting mandrel 1 shrinks more than that of the epoxy resin. Therefore, at low temperature, PTFE does not adhere to the epoxy resin or connect to the surrounding structure, and can be easily detached.

[0036] Specifically, the cross-section of blind hole 2 is gear-shaped. This structure indirectly increases the surface area of ​​the inner wall of blind hole 2, allowing it to deform over a larger range without causing defects such as cracks, without significantly increasing the opening diameter.

[0037] The bottom of the blind hole 2 can also be provided with a nut 3 that mates with the fastener 4. The bottom diameter of the blind hole 2 can be set to be slightly smaller than the outer diameter of the nut 3. The nut 3 can be fixed by interference fit to prevent it from being rotated when the fastener 4 rotates.

[0038] The bottom surface of the lower tapered section 13 is flat, forming a fixing hole for the fastener 4 to be inserted and fixed.

[0039] Optionally, a thread is formed in the fixing hole to mate with the fastener 4, and the potting mandrel 1 is directly tightened and fixed by the fastener 4.

[0040] In some embodiments, a pull rod 5 is also included. The top end of the pull rod 5 is provided with a pull ring 51. The bottom surface of the pull rod 5 is concave to form a threaded inner hole. The fastener 4 passes through the fixing hole and engages with the threaded inner hole of the pull rod 5 to fix the potting mandrel 1 on the motor 100 through threaded engagement. The engagement method of the pull rod 5 and the fastener 4 in this scheme is similar to that of a turnbuckle, and the principle is also similar.

[0041] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A waterproof potting fixture for motors, characterized in that: include The potting mandrel made of PTFE material includes an upper tapered section, a middle straight section and a lower tapered section formed in sequence; a blind hole is formed from top to bottom along the axis of the cylinder, passing through the upper tapered section, the middle straight section and ending at the lower tapered section; the bottom surface of the lower tapered section is flat, forming a fixing hole for fasteners to be inserted and fixed. And fasteners.

2. The waterproof potting fixture for an electric motor as described in claim 1, characterized in that: The taper of the upper and lower taper sections is between 1:45 and 1:

55.

3. The waterproof potting fixture for an electric motor as described in claim 1, characterized in that: The cross-section of the blind hole is gear-shaped.

4. The waterproof potting fixture for an electric motor as described in claim 1, characterized in that: The bottom of the blind hole is equipped with a nut that mates with a fastener.

5. The waterproof potting fixture for an electric motor as described in claim 1, characterized in that: A thread is formed inside the fixing hole to mate with the fastener.

6. The waterproof potting fixture for an electric motor as described in claim 1, characterized in that: It also includes a pull rod with a pull ring at the top and a threaded inner hole formed by the concave bottom surface of the pull rod. Fasteners pass through the fixing hole and engage with the threaded inner hole of the pull rod to fix the potting mandrel to the motor.

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