Heat shrink tubing assembly and motor thereof
By designing spiral grooves and using hot melt adhesive in the heat shrink tubing assembly, the problem of sealant gaps caused by enameled wire rewinding was solved, achieving a better sealing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GREE ELECTRIC APPLIANCE INC OF ZHUHAI
- Filing Date
- 2025-07-02
- Publication Date
- 2026-06-30
AI Technical Summary
During the welding process of existing heat shrink tubing, the enameled wire wraps back around the insulation of the power cord, causing gaps in the sealant and affecting the sealing effect.
The inner heat shrink tubing is designed with a spirally extended groove, and hot melt adhesive is filled between the outer and inner heat shrink tubing. A heat-conducting fixing tube can be optionally added to ensure effective positioning and sealing of the enameled wire and power cord.
The design of spiral grooves and hot melt adhesive prevents the enameled wire from sliding inside the inner heat shrink tubing, ensuring the integrity of the sealant and improving the sealing effect after welding.
Smart Images
Figure CN224437293U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of motor technology, specifically relating to a heat shrink tubing assembly and a motor having the same. Background Technology
[0002] In the field of motor manufacturing, stator processing often involves welding enameled wire to the power cord core. The weld joints formed during this process require effective protection. This protection must prevent burrs from scratching the nearby enameled wire and ensure proper insulation. Under normal circumstances, ordinary insulating tape is used to position the weld joint, or insulating sleeves are used after tape application to enhance insulation. In special weld joints, such as copper-aluminum connections, heat-shrink tubing, which offers a better seal, is used for heat shrink protection. However, the sealing effect of heat-shrink tubing is still insufficient, especially in weld joints where enameled wire is often wrapped back around the power cord sheath. This wrapped wire can slide inside the heat-shrink tubing, easily causing gaps in the sealant between the tubing and the power cord, affecting the final sealing effect. Utility Model Content
[0003] Therefore, this utility model provides a heat shrink tubing assembly that can solve the technical problem that, during the process of sealing the enameled wire and power cord through the heat shrink tubing after welding, if the enameled wire is wrapped back on the wire sheath of the power cord, the wrapped enameled wire will slide inside the heat shrink tubing, which can easily cause gaps in the sealant filling between the heat shrink tubing and the power cord, thus affecting the final sealing effect.
[0004] To address the aforementioned problems, this utility model provides a heat shrink tubing assembly, including an inner heat shrink tubing, wherein a spirally extending groove is formed on the inner peripheral wall of the inner heat shrink tubing.
[0005] In some embodiments, the first end of the inner heat shrink tubing is open, and the second end of the inner heat shrink tubing is closed.
[0006] In some embodiments, an outer heat shrink tubing is sleeved around the inner heat shrink tubing.
[0007] In some embodiments, a receiving gap is formed between the inner heat shrink tubing and the outer heat shrink tubing, and the receiving gap is filled with hot melt adhesive.
[0008] In some embodiments, the first end of the outer heat shrink tubing is open, and the second end of the outer heat shrink tubing is closed.
[0009] In some embodiments, the first end of the outer heat shrink tubing is flush with the first end of the inner heat shrink tubing, or the first end of the outer heat shrink tubing extends beyond the first end of the inner heat shrink tubing.
[0010] In some embodiments, a heat-conducting fixing tube is sleeved around the outer heat-shrink tubing.
[0011] In some embodiments, both ends of the heat-conducting fixing tube are open.
[0012] In some embodiments, the first end of the thermally conductive fixing tube is flush with the first end of the outer heat-shrinkable tube, or the first end of the thermally conductive fixing tube extends beyond the first end of the outer heat-shrinkable tube.
[0013] This utility model also provides a motor, including the aforementioned heat shrink tubing assembly.
[0014] The present invention provides a heat shrink tubing assembly and a motor incorporating it, which have the following beneficial effects:
[0015] When the soldered enameled wire and power wire are insulated and sealed through the heat shrink tubing assembly of this application, during the insertion of the enameled wire and power wire into the inner heat shrink tubing, because the power wire is thicker and the enameled wire is thinner, the power wire is directly inserted into the inner heat shrink tubing along its length, while the enameled wire can be held in the groove and move forward along the extension direction of the groove. This allows the enameled wire to still have the effect of being wrapped around the power wire. At the same time, the spirally extending groove effectively positions the enameled wire, preventing it from moving within the inner heat shrink tubing and avoiding damage to the sealant, thus ensuring the final sealing effect. Attached Figure Description
[0016] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.
[0017] Figure 1 A cross-sectional view of the welded enameled wire and power cord inserted into the heat shrink tubing assembly of this utility model embodiment;
[0018] Figure 2 for Figure 1 Enlarged diagram of point A in the diagram;
[0019] Figure 3 for Figure 1 Enlarged diagram of point B in the diagram;
[0020] Figure 4 for Figure 1 Enlarged diagram of point C in the diagram;
[0021] Figure 5 This is a cross-sectional view of the heat shrink tubing assembly according to an embodiment of the present utility model;
[0022] Figure 6 This is a cross-sectional view of the heat shrink tubing assembly of this utility model embodiment after removing the heat-conducting fixing tube;
[0023] Figure 7 for Figure 6 Enlarged diagram of point D in the diagram.
[0024] The reference numerals in the attached figures are as follows:
[0025] 1. Inner heat shrink tubing; 2. Groove; 3. Outer heat shrink tubing; 4. Hot melt adhesive; 5. Thermally conductive fixing tube; 6. Enamelled wire; 7. Power cord. Detailed Implementation
[0026] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0027] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not 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 on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.
[0028] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0029] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.
[0030] See also Figures 1 to 7 As shown, according to an embodiment of the present invention, a heat shrink tubing assembly is provided, including an inner heat shrink tubing 1, wherein a spirally extending groove 2 is formed on the inner peripheral wall of the inner heat shrink tubing 1.
[0031] In this technical solution, when the welded enameled wire 6 and power wire 7 are insulated and sealed through the heat shrink tubing assembly of this application, during the insertion of the enameled wire 6 and power wire 7 into the inner heat shrink tubing 1, because the power wire 7 is thicker and the enameled wire 6 is thinner, the power wire 7 is directly inserted into the inner heat shrink tubing 1 along its length, while the enameled wire 6 can be held in the groove 2 and move along the extension direction of the groove 2. This allows the enameled wire 6 to still have the effect of being wrapped around the power wire 7. At the same time, the spirally extending groove 2 effectively positions the enameled wire 6, preventing it from moving within the inner heat shrink tubing 1 and avoiding damage to the sealant, thus ensuring the final sealing effect. The cross-sectional shape of the groove 2 can be square or semi-circular, etc.
[0032] It should be noted that, for heat shrink tubing without a spiral groove in the prior art, after heat shrinking and sealing the enameled wire 6 and the power wire 7, the rewound enameled wire 6 will push up the heat shrink tubing, creating a bulging space inside and affecting the internal sealing effect. However, the inner heat shrink tubing 1 of this application has a spirally extending groove 2. After heat shrinking and sealing the enameled wire 6 and the power wire 7, the rewound enameled wire 6 will be concealed within the spirally extending groove 2, thus preventing the enameled wire 6 from pushing up the heat shrink tubing and further improving the internal sealing effect of the heat shrink tubing assembly.
[0033] See also Figure 1 , Figure 3 and Figure 6 As shown, the first end of the inner heat shrink tubing 1 is open, and the second end is closed. After the enameled wire 6 and the power wire 7 are soldered and inserted into the inner heat shrink tubing 1, the entire insulation seal can be achieved simply by sealing the first end of the inner heat shrink tubing 1.
[0034] See also Figures 1 to 3 and Figure 6 As shown, an outer heat shrink tubing 3 is fitted around the inner heat shrink tubing 1.
[0035] In this embodiment, the insulation effect of the weld joint can be improved by wrapping an outer heat shrink tube 3 around the inner heat shrink tube 1.
[0036] See also Figure 1 , Figure 3 , Figure 6 and Figure 7 As shown, an accommodating gap is formed between the inner heat shrink tubing 1 and the outer heat shrink tubing 3, and the accommodating gap is filled with hot melt adhesive 4.
[0037] In this technical solution, hot melt adhesive 4 is filled into the accommodating gap formed between the inner heat shrink tubing 1 and the outer heat shrink tubing 3. During the heat shrink sealing process of the heat shrink tubing assembly, enameled wire 6, and power cord 7, the heated hot melt adhesive 4 overflows from the accommodating gap, sealing the gaps between the inner heat shrink tubing 1 and the enameled wire 6, the power cord 7, and the edges of the inner heat shrink tubing 1 and the outer heat shrink tubing 3, thereby achieving a sealing and protective effect. It is understood that the hot melt adhesive 4 is solid at room temperature, but it becomes liquid and regains its adhesiveness when heated.
[0038] See Figure 6 and Figure 7As shown, the first end of the outer heat shrink tubing 3 is open, and the second end of the outer heat shrink tubing 3 is closed. When the outer heat shrink tubing 3 is fitted around the inner heat shrink tubing 1, a receiving gap with one end open and the other end closed is formed between the outer heat shrink tubing 3 and the inner heat shrink tubing 1. In this way, hot melt adhesive 4 can be poured in from the open end of the receiving gap without worrying about the hot melt adhesive 4 flowing out from the other end.
[0039] See also Figure 1 , Figure 3 , Figure 6 and Figure 7 As shown, the first end of the outer heat shrink tubing 3 is flush with the first end of the inner heat shrink tubing 1, or the first end of the outer heat shrink tubing 3 extends beyond the first end of the inner heat shrink tubing 1. This ensures that after the gap is filled with hot melt adhesive 4, the hot melt adhesive 4 can reach the first end of the inner heat shrink tubing 1. Therefore, during hot melt sealing, the hot melt adhesive 4 can seal the gaps at the edges of the sleeves between the inner heat shrink tubing 1 and the enameled wire 6 and the power cord 7, as well as the gaps at the edges of the sleeves between the inner heat shrink tubing 1 and the outer heat shrink tubing 3.
[0040] See also Figure 1 and Figure 5 As shown, a heat-conducting fixing tube 5 is sleeved around the outer heat shrink tubing 3.
[0041] In this embodiment, if the inner heat shrink tubing 1 and the outer heat shrink tubing 3 are directly heat-shrunk and sealed, the first end of the outer heat shrink tubing 3 will turn outward due to the heat flow of the hot melt adhesive 4. By sleeved with a thermally conductive fixing tube 5 around the outer heat shrink tubing 3, the first end of the outer heat shrink tubing 3 is constrained and restricted circumferentially by the thermally conductive fixing tube 5 when heat-shrunk sealing the inner heat shrink tubing 1 and the outer heat shrink tubing 3 through the thermally conductive fixing tube 5, thus preventing the first end of the outer heat shrink tubing 3 from turning outward. At the same time, the thermally conductive fixing tube 5 also further strengthens the outer wall strength of the heat shrink tubing assembly, making manual operation more convenient. The thermally conductive fixing tube 5 can be made of silicon material, which not only has good thermal conductivity but also good insulation properties. It should be noted that the first end of the heat-conducting fixing tube 5 is flush with the first end of the outer heat-shrinkable tube 3, or the first end of the heat-conducting fixing tube 5 extends beyond the first end of the outer heat-shrinkable tube 3. This ensures that the heat-conducting fixing tube 5 completely constrains and restricts the first end of the outer heat-shrinkable tube 3 in the circumferential direction.
[0042] See also Figure 1 and Figure 5 As shown, both ends of the heat-conducting fixing tube 5 are open, which makes it easier to put the heat-conducting fixing tube 5 onto the outer heat-shrinkable tube 3. At the same time, after the heat-conducting fixing tube 5 is put onto the outer heat-shrinkable tube 3, it is also easier to adjust its position on the outer heat-shrinkable tube 3.
[0043] It should be noted that the production and use steps of the heat shrink tubing assembly in this application are as follows:
[0044] Step 1: Use extrusion molding tooling to produce the designed tubular heat shrink tubing material, with the inner heat shrink tubing mold having spiral protrusions;
[0045] Step 2: Hot melt adhesive is injected between the inner and outer heat shrink tubing layers to serve as an adhesive before subsequent heat shrinking.
[0046] Step 3: Use a lamination machine to seal and fold the inner and outer heat shrink tubing ends;
[0047] Step 4: Insert the inner and outer heat shrink tubing into the thermally conductive fixing tubing of the appropriate length;
[0048] Step 5: In the stator manufacturing process of the motor product, the power cord and enameled wire are spirally inserted into the groove at the weld joint.
[0049] Step 6: Use a hot air gun to heat and shrink the tubing. The hot melt adhesive between the inner and outer heat shrink tubing becomes more fluid when heated, and at the same time, the inner and outer heat shrink tubing naturally locks and squeezes out, thus sealing the gaps in the tubing.
[0050] Step 7: After completing the heat shrinking process, proceed to the next step of stator manufacturing.
[0051] This utility model also provides a motor, including the aforementioned heat shrink tubing assembly.
[0052] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.
[0053] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. A heat shrink tubing assembly, characterized in that, It includes an inner heat shrink tubing (1), on the inner peripheral wall of which a spirally extending groove (2) is formed.
2. The heat shrink tube assembly of claim 1, wherein, The first end of the inner heat shrink tubing (1) is open, and the second end of the inner heat shrink tubing (1) is closed.
3. The heat shrink tube assembly of claim 1, wherein, The outer heat shrink tubing (3) is sleeved around the inner heat shrink tubing (1).
4. The heat shrink tube assembly of claim 3, wherein, A receiving gap is formed between the inner heat shrink tubing (1) and the outer heat shrink tubing (3), and the receiving gap is filled with hot melt adhesive (4).
5. The heat shrink tube assembly of claim 3, wherein, The first end of the outer heat shrink tubing (3) is open, and the second end of the outer heat shrink tubing (3) is closed.
6. The heat shrink tube assembly of claim 5, wherein, The first end of the outer heat shrink tubing (3) is flush with the first end of the inner heat shrink tubing (1), or the first end of the outer heat shrink tubing (3) extends beyond the first end of the inner heat shrink tubing (1).
7. A heat shrink tube assembly according to any one of claims 3 to 6, wherein, The outer heat shrink tubing (3) is surrounded by a heat-conducting fixing tube (5).
8. The heat shrink tube assembly of claim 7, wherein, Both ends of the heat-conducting fixing tube (5) are open.
9. The heat shrink tubing assembly according to claim 7, characterized in that, The first end of the heat-conducting fixing tube (5) is flush with the first end of the outer heat-shrinkable tube (3), or the first end of the heat-conducting fixing tube (5) extends beyond the first end of the outer heat-shrinkable tube (3).
10. An electric machine characterized by Includes the heat shrink tubing assembly as described in any one of claims 1 to 9.