Waterproof outgoing line assembly and motor using same

Abstract

The utility model relates to the technical field of motors, in particular to a waterproof leading-out wire assembly and a motor using the same, and the waterproof leading-out wire assembly comprises an end cover which is provided with a connecting hole; the wire outlet transition piece comprises a cover plate suitable for covering the connecting hole, an extension part which is convexly arranged at one side end of the cover plate and is suitable for being at least partially inserted into the connecting hole, and a wire hole coaxially penetrating through the extension part and the cover plate; the wire protecting sleeve is suitable for simultaneously penetrating through the connecting hole and the wire hole; and the sealant is suitable for being filled in a filling interval formed between the outer side wall of the extension part and the inner hole wall of the connecting hole. According to the utility model, the waterproof performance of the outgoing line structure of the motor can be realized based on a simplified structure. According to the utility model, the waterproof performance of the outgoing line assembly can be realized based on a simplified structure.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a waterproof lead-out wire assembly and a motor using the same. Background Art

[0002] For motors working in humid or outdoor environments, such as water pump motors or submersible pump motors, in order to prevent moisture from penetrating into the motor through the gap between the motor lead wire and the mounting hole, causing water to enter the motor and become damp, resulting in a short circuit and burning of the motor, some motor waterproof structures in the prior art mainly provide a sealing ring between the motor lead wire and the mounting hole. However, the above motor waterproof structure still has the possibility of water entering the motor, that is, when the insulation layer of the lead wire outside the motor is broken, the motor may be damaged.

[0003] When the lead wire is damaged, water may enter the motor through the damaged part of the lead wire along the gap between the insulation layer and the conductive layer of the lead wire, causing the motor to short circuit, posing a safety hazard.

[0004] Based on the above situation, the patent with announcement number CN 218335574 U discloses a motor outlet waterproof sealing injection molded part, in which the fixed seat is designed with injection hole 1 and injection hole 2, and the injection hole 2 is also connected to a guide groove. That is, the sealing cooperation between the fixed seat and the motor barrel and the wire sleeve is ensured by the cooperation of multiple injection structures, so as to achieve a waterproof effect. For this disclosed technology, although it can meet the waterproof requirements for the motor outlet structure, the injection structure is complicated and the mold opening cost is high, which leads to a high production cost of the overall waterproof structure, and the injection process is also relatively complicated, requiring two injections in succession, so the operation is cumbersome. In addition, the fixed seat and the motor barrel in the above disclosed technology are shape-matched plug-in structures. For this, high precision is required in the overall production process of the fixed seat, so as to ensure that the motor barrel and the fixed seat can complete reliable plug-in cooperation.

[0005] Therefore, for the waterproof structure of the motor outlet, on the basis of taking into account the formation of reliable sealing and waterproofing, it is also necessary to consider the simplicity of the overall structure, so as to reduce its production cost and improve its assembly convenience. Utility Model Content

[0006] The first object of the utility model is to provide a waterproof lead-out wire assembly to solve the technical problem of achieving waterproofness of the lead-out wire assembly based on a simplified structure.

[0007] The second object of the utility model is to provide a motor to solve the technical problem of achieving waterproofness of a lead wire assembly of the motor based on a simplified structure.

[0008] The waterproof lead-out wire assembly of the utility model is realized as follows:

[0009] A waterproof lead-out wire assembly, comprising:

[0010] An end cover, wherein a connecting hole is formed on the end cover;

[0011] An outlet transition piece, the outlet transition piece comprising a cover plate suitable for covering the connection hole, an extension portion protruding from one side end of the cover plate and suitable for at least partially inserting into the connection hole, and a wire hole coaxially penetrating the extension portion and the cover plate;

[0012] A wire protection sleeve, which is suitable for simultaneously passing through the connection hole and the wire hole;

[0013] The sealant is suitable for filling in a filling interval formed between the outer wall of the extension portion and the inner wall of the connecting hole.

[0014] In an optional implementation of the present invention, the extension portion is a cylindrical structure, and the connecting hole is a cylindrical hole; the outer diameter of the extension portion is smaller than the inner diameter of the connecting hole.

[0015] In an optional implementation of the present invention, the depth of the extension portion inserted into the connecting hole is less than the axial length of the connecting hole.

[0016] In an optional implementation of the present invention, the depth of the extension portion inserted into the connecting hole is 1 / 2 to 2 / 3 of the axial length of the connecting hole.

[0017] In an optional implementation of the present invention, a convex ring connected to the connecting hole is further provided on the side of the end cover facing away from the cover plate.

[0018] In an optional implementation of the present invention, an annular accommodating groove is further recessed on the cover plate and located on the circumferential outer side of the extension portion.

[0019] In an optional implementation of the present invention, the inner diameter of the accommodating groove is not less than the inner diameter of the connecting hole.

[0020] In an optional implementation of the present invention, the wire protection sleeve is suitable for interference fit with the wire hole.

[0021] In an optional implementation of the present invention, the cover plate is suitable for being fastened to the end cover by screws.

[0022] The motor of the utility model is realized as follows:

[0023] A motor comprises: the waterproof lead-out wire assembly.

[0024] By adopting the above technical solution, the utility model has the following beneficial effects: the waterproof lead-out wire assembly of the utility model and the motor using the same, for the lead-out wire transition piece and the end cover, the sealant can be directly filled in the above-mentioned interval through the interval formed between the connection hole and the extension part, which simplifies the processing process, and the precision requirement for the processing of the entire extension part and the connection hole is low. Furthermore, for the cooperation between the end cover and the lead-out wire transition piece, only screws are needed, which is convenient and low in production cost. Therefore, compared with the comparative documents, the production cost of the overall waterproof lead-out wire assembly can be directly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Shown is a schematic diagram of the exploded structure of the waterproof lead-out wire assembly of the utility model;

[0026] Figure 2 The figure shows a schematic structural diagram of the lead-out transition piece of the waterproof lead-out assembly of the utility model;

[0027] Figure 3 The figure is a first-view structural schematic diagram of the end cover of the waterproof lead-out wire assembly of the utility model;

[0028] Figure 4 The figure is a second perspective structural schematic diagram of the end cover of the waterproof lead-out wire assembly of the utility model;

[0029] Figure 5 The figure shows a schematic diagram of the structure of the waterproof lead-out wire assembly of the utility model applied in a motor;

[0030] Figure 6 for Figure 5 Enlarged view of part A.

[0031] In the figure: end cover 1, connecting hole 11, convex ring 12, cover plate 21, extension part 22, wire hole 23, accommodating groove 25, screw hole 3, wire sheath 4, wire harness 5, sealant 6, motor body 7, screw 8. DETAILED DESCRIPTION

[0032] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0033] Embodiment 1:

[0034] See also Figures 1 to 6As shown, this embodiment provides a waterproof lead-out assembly, which is suitable for, for example but not limited to, a motor. The waterproof lead-out assembly includes: an end cap 1, a lead-out transition piece, a wire sheath 4, and a sealant 6 for use. The end cap 1 can be a part of the structure of the motor itself. In order to make the end cap 1 of the motor itself adapt to the lead-out transition piece, a connection hole 11 is preset on the end cap 1.

[0035] It should be noted that the connection hole 11 on the end cover 1 is mainly used to allow the lead wire of the motor to pass through. Therefore, this connection hole 11 can be a regular circular structure, or other regular shapes, or an irregular shape. As long as it can be suitable for the lead wire to pass through, it can meet the use requirements of this embodiment. This embodiment takes an easy-to-process cylindrical hole as an example in conjunction with the accompanying drawings.

[0036] Next, the focus will be on the wire-outlet transition piece used in this embodiment.

[0037] The outgoing wire transition piece includes a cover plate 21 suitable for covering the connection hole 11, an extension portion 22 protruding from one side end of the cover plate 21 and suitable for at least partially inserting into the connection hole 11, and a wire hole 23 coaxially penetrating the extension portion 22 and the cover plate 21. The wire sheath 4 is suitable for simultaneously penetrating the connection hole 11 and the wire hole 23. In a preferred implementation, the outgoing wire transition piece used in this embodiment is an injection molded part, which is easy to process and has low cost.

[0038] For the cover plate 21 here, it can be directly fastened to the end cover 1 by screws 8, and screw holes 3 are respectively designed on the cover plate 21 and the end cover 1. Under this structure, when the cover plate 21 and the end cover 1 are assembled in place, at least part of the extension part 22 is inserted into the connection hole 11, and the wire sheath 4 can just pass through the connection hole 11 and the wire hole 23 at the same time.

[0039] The wire protection sleeve 4 here can form an interference fit with the wire hole 23. Specifically, the diameter of the wire hole 23 is slightly smaller than the outer diameter of the wire protection sleeve 4, so that the wire protection sleeve 4 has a certain pre-squeezing force, which is conducive to sealing.

[0040] Based on the above situation, a filling interval is formed between the outer wall of the extension portion 22 and the inner wall of the connecting hole 11, and the sealant 6 is filled in the filling interval to achieve the sealing cooperation between the cable sheath 4, the end cover 1 and the outlet transition piece, thereby ensuring the waterproofness of the wire harness 5 in the cable sheath 4. The sealant 6 here can be made of materials such as silicone potting glue, polyurethane potting glue, silicone sealant, etc.

[0041] In order to ensure that the sealant 6 can effectively ensure the sealing effect between the cable sheath 4, the end cover 1 and the outlet transition piece, the present embodiment also makes the following design:

[0042] First, let's take the example where the extension portion 22 is a cylindrical structure and the connecting hole 11 is a cylindrical hole; the outer diameter of the extension portion 22 is smaller than the inner diameter of the connecting hole 11, so that there is space between the extension portion 22 and the connecting hole 11 in the radial dimension to accommodate the sealant 6.

[0043] Secondly, the depth of the extension portion 22 inserted into the connection hole 11 is less than the axial length of the connection hole 11. In an optional embodiment, the depth of the extension portion 22 inserted into the connection hole 11 is 1 / 2 to 2 / 3 of the axial length of the connection hole 11. In this way, there is a space between the extension portion 22 and the connection hole 11 in the axial dimension to accommodate the sealant 6.

[0044] Furthermore, in an optional embodiment, an annular receiving groove 25 is also recessed on the cover plate 21 and located on the circumferential outer side of the extension portion 22. The inner diameter of the receiving groove 25 is not less than the inner diameter of the connecting hole 11. The receiving groove 25 here can form a third-dimensional receiving space for the sealant 6. Here, in combination with the accompanying drawings, it is preferably taken as an example that the inner diameter of the receiving groove 25 is larger than the inner diameter of the connecting hole 11, thereby further expanding the filling space of the sealant 6, which not only improves the sealing stability, but also enhances the reliability of the connection so that the wire sheath 4 is not easy to fall off.

[0045] In addition, it should be noted that, considering that the connecting hole 11 is preset on the end cover 1, if the end cover 1 is a relatively thin structure as a whole, the axial depth of the connecting hole 11 is also relatively small. In this regard, in order to increase the filling amount of the sealant 6, this embodiment further provides a convex ring 12 connected to the connecting hole 11 on the side of the end cover 1 facing away from the cover plate 21, so that the connecting hole 11 extends into the convex ring 12, thereby increasing the axial depth of the connecting hole 11.

[0046] In summary, a space filled with sealant 6 is formed between the extension portion 22 and the connecting hole 11 through multiple different dimensions, which fully ensures that the filling amount of sealant 6 is large enough, and that the sealant 6 can fully form effective contact with the wire sheath 4, the extension portion 22 and the end cover 1, as well as the inner hole wall of the connecting hole 11, ensuring that the contact area is sufficient, thereby ensuring the sealing effect, and further ensuring the waterproofness of the lead wire when the waterproof lead wire assembly of this embodiment is used in a specific motor.

[0047] Embodiment 2:

[0048] See also Figures 1 to 6 As shown, based on the waterproof lead wire assembly of embodiment 1, this embodiment provides a motor, which adopts the waterproof lead wire assembly of embodiment 1. The end cover 1 in the waterproof lead wire assembly is connected to the motor body 7.

[0049] Considering the reliable fit between the lead wire of the motor and the wire sheath 4, the outer layer of the wire harness 5 passing through the wire sheath 4 is wrapped with a plastic material with a certain temperature resistance. The material needs to have a certain elastic deformation ability. The wire harness 5 is a single-strand multi-core wire, and the number of core wires depends on the functional requirements of the product. For example, a three-phase permanent magnet brushless motor generally uses 8-core wires, including 3 phase wires and 5 Hall plate connecting wires.

[0050] The motor in this embodiment can be applied to the field of servo motor drive and control integrated system.

[0051] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0052] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A waterproof lead-out wire assembly, characterized in that: include: An end cover, wherein a connecting hole is formed on the end cover; An outlet transition piece, the outlet transition piece comprising a cover plate suitable for covering the connection hole, an extension portion protruding from one side end of the cover plate and suitable for at least partially inserting into the connection hole, and a wire hole coaxially penetrating the extension portion and the cover plate; A wire protection sleeve, which is suitable for simultaneously passing through the connection hole and the wire hole; The sealant is suitable for filling in a filling interval formed between the outer wall of the extension portion and the inner wall of the connecting hole.

2. The waterproof lead-out wire assembly according to claim 1, characterized in that: The extension portion is a cylindrical structure, and the connecting hole is a cylindrical hole; The outer diameter of the extension portion is smaller than the inner diameter of the connecting hole.

3. The waterproof lead-out wire assembly according to claim 2, characterized in that: The depth of the extension portion inserted into the connecting hole is less than the axial length of the connecting hole.

4. The waterproof lead-out wire assembly according to claim 3, characterized in that: The depth of the extension portion inserted into the connecting hole is 1 / 2 to 2 / 3 of the axial length of the connecting hole.

5. The waterproof lead-out wire assembly according to claim 3, characterized in that: A convex ring which is connected to the connecting hole is also provided on the side of the end cover facing away from the cover plate.

6. The waterproof lead-out wire assembly according to claim 1 or 2, characterized in that: An annular accommodating groove is also concavely provided on the cover plate and located on the circumferential outer side of the extension portion.

7. The waterproof lead-out wire assembly according to claim 6, characterized in that: The inner diameter of the accommodating groove is not less than the inner diameter of the connecting hole.

8. The waterproof lead-out wire assembly according to claim 1, characterized in that: The wire protection sleeve is suitable for interference fit with the wire hole.

9. The waterproof lead-out wire assembly according to claim 1, characterized in that: The cover plate is suitable for being fastened to the end cover by screws.

10. A motor, characterized in that: include: A waterproof lead-out wire assembly as claimed in any one of claims 1 to 9.

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