Anti-cracking stator plastic-coated structure
Through the two-time plastic wrapping process and convex rib design, the problem of thin walls of the stator is easily cracked, simplified the assembly process, reduced costs, extended the stator life, and avoided seal ring aging and screw torque reduction.
Patent Information
- Application Number
- CN202422277699.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-18
AI Technical Summary
The assembly of traditional stator structures is complex and costly, the life of the sealing ring affects leakage, and thin-walled stators are prone to cracking, and the existing injection molding process is difficult to solve the cracking problem.
The two-time plastic wrapping process is adopted. By leaving a second groove on the first plastic wrapping body of the stator and combining the structure of the second plastic wrapping body, the thickness of the two plastic wrapping bodies increases when the two plastic wrapping bodies is combined. The welded wire is controlled by using convex ribs to avoid cracking, and reduce parts and assembly processes.
The anti-cracking of the stator structure is achieved, the assembly process is simplified, the cost is reduced, the stator life is extended, and the seal ring aging and the screw torque is reduced.
Smart Images
Figure CN223093546U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of plastic-coated structures, in particular to a stator plastic-coated structure for preventing cracking. Background Art
[0002] In an electronic water pump, the stator is a very important and complex component. In the traditional stator design, the stator needs to rely on multiple components such as a housing, a waterproof chamber, and a sealing ring to form a sealed area after assembly to ensure that the stator is not affected by water vapor in the air and leakage of the coolant inside the electronic water pump. The assembly process of the traditional stator structure is complex, the process time is long, the cost is high, and it is prone to leakage due to the influence of the service life of the sealing ring, resulting in the failure of the stator.
[0003] Now, a plastic-coated structure of the stator is designed, which can highly integrate the stator structure, and package the housing, the waterproof chamber, the shaft, and the stator together to form a stator assembly. However, if the stator is plastic-coated only once, the wall thickness in some areas is too thick. Now, it is split into a first injection molding and a second injection molding, with uniform wall thickness and controllable injection molding process, and finally a stator assembly is formed.
[0004] However, there is a very difficult problem in the manufacturing process of the stator plastic coating. Since the motor aims to improve efficiency, the stator wall thickness is made thinner and thinner, and the thinner it is, the more prone to cracking and leakage. Through testing, we found that the cracking positions usually exist at the positions of the plastic weld lines during injection molding. In order to completely improve this cracking problem, now a stator plastic-coated structure is used to improve the problem of the weld lines. Summary of the Utility Model
[0005] To solve the above technical problems, the utility model provides a stator plastic-coated structure for preventing cracking, in which the thickness of some positions increases when two strands of plastic converge, and no cracking phenomenon will occur when subjected to temperature shock. By adopting two plastic coatings, the number of parts and the assembly process are saved.
[0006] An anti-cracking stator plastic coating structure of the utility model includes a stator and multiple groups of first grooves, and the multiple groups of first grooves are circumferentially and equidistantly arranged on the inner side wall of the stator; it also includes a first plastic coating body, second grooves, and a second plastic coating body. The multiple groups of second grooves are respectively circumferentially arranged on the inner side walls of the multiple groups of first plastic coating bodies, and the positions of the multiple groups of second grooves correspond to the positions of the multiple groups of first grooves. The first plastic coating body is arranged on the outer side wall of the stator, and the second plastic coating body is arranged on the outer side wall of the first plastic coating body; when the stator is first plastic-coated with the first plastic coating body, by reserving multiple groups of second grooves on the first plastic coating body that are equal in number and corresponding in position to the first grooves, when the first plastic coating body is second plastic-coated with the second plastic coating body, through the cooperation of the corresponding structures on the second plastic coating body and the multiple groups of second grooves, the thickness of some positions increases when the two plastic flows converge, and when subjected to temperature shock, no cracking phenomenon will occur. By adopting two plastic coating processes, the number of parts and the assembly process are saved.
[0007] Preferably, the second plastic coating body includes a stator plastic coating structure, a glue inlet, and convex ribs. Multiple groups of glue inlets are arranged on the outer side wall of the top surface of the stator plastic coating structure, and multiple groups of convex ribs are circumferentially arranged on the inner side wall of the stator plastic coating structure. The positions of the multiple groups of convex ribs and the multiple groups of glue inlets are arranged alternately, and the positions and numbers of the multiple groups of convex ribs match those of the multiple groups of second grooves; when the first plastic coating body is second plastic-coated with the stator plastic coating structure, by arranging the multiple groups of glue inlets between the multiple groups of convex ribs, when plastic is injected, the weld line generated when the two plastic flows converge will be controlled on the convex ribs of the stator's second plastic coating. Since the convex ribs are thicker than other positions, when subjected to temperature shock, no cracking phenomenon will occur, making full use of the existing structure and solving the cracking problem caused by too thin wall thickness during plastic coating.
[0008] Preferably, both the first plastic coating body and the stator plastic coating structure are integrally formed structures; avoiding the use of sealing rings or bolt components, there is no problem of sealing ring aging and screw torque decline, improving the cracking problem and being beneficial to increasing the service life of the stator plastic coating structure.
[0009] Preferably, the positions of the multiple groups of glue inlets are optimized and adjusted; by adding second grooves and convex ribs at the first injection and second injection positions respectively, and by adjusting the positions of the glue inlets, the weld line is concentrated at the position of the wall thickness of the second injection to ensure no cracking.
[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: when the stator is first plastic-coated with the first plastic coating body, by reserving multiple groups of second grooves on the first plastic coating body that are equal in number and corresponding in position to the first grooves, when the first plastic coating body is second plastic-coated with the second plastic coating body, through the cooperation of the corresponding structures on the second plastic coating body and the multiple groups of second grooves, the thickness of some positions increases when the two plastic flows converge, and when subjected to temperature shock, no cracking phenomenon will occur. By adopting two plastic coating processes, the number of parts and the assembly process are saved. Description of the Drawings
[0011] Figure 1 is an isometric structural schematic diagram of the present utility model;
[0012] Figure 2 is an isometric exploded structural schematic diagram of the connection between the first plastic-coated body and the second groove, etc.;
[0013] Figure 3 is an isometric structural schematic diagram of the connection between the stator plastic-coated structure and the glue inlet, etc.;
[0014] Figure 4 is an isometric exploded structural schematic diagram of the connection between the first plastic-coated body and the second groove, etc.;
[0015] Figure 5 is an isometric structural schematic diagram of the stator and the first plastic-coated body, etc.
[0016] Reference signs in the drawings: 1, stator; 2, first groove; 3, first plastic-coated body; 4, second groove; 5, second plastic-coated body; 6, stator plastic-coated structure; 7, glue inlet; 8, rib. Specific embodiments
[0017] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.
[0018] Embodiment 1
[0019] As Figures 1 to 5 shown, a stator plastic-coated structure for preventing cracking of the present utility model includes a stator 1 and multiple groups of first grooves 2, and the multiple groups of first grooves 2 are circumferentially and equidistantly arranged on the inner side wall of the stator 1; it further includes a first plastic-coated body 3, a second groove 4 and a second plastic-coated body 5. The multiple groups of second grooves 4 are respectively circumferentially arranged on the inner side walls of the multiple groups of first plastic-coated bodies 3, and the positions of the multiple groups of second grooves 4 are the same as those of the multiple groups of first grooves 2. The first plastic-coated body 3 is arranged on the outer side wall of the stator 1, and the second plastic-coated body 5 is arranged on the outer side wall of the first plastic-coated body 3;
[0020] As Figure 1 shown, the second plastic-coated body 5 includes a stator plastic-coated structure 6, a glue inlet 7 and ribs 8. The multiple groups of glue inlets 7 are all arranged on the outer side wall of the top surface of the stator plastic-coated structure 6. The multiple groups of ribs 8 are all circumferentially arranged on the inner side wall of the stator plastic-coated structure 6. The positions of the multiple groups of ribs 8 and the multiple groups of glue inlets 7 are arranged alternately, and the positions and numbers of the multiple groups of ribs 8 match those of the multiple groups of second grooves 4;
[0021] In this embodiment, when the stator 1 is plastically coated with the first plastic coating body 3 for the first time, a plurality of second grooves 4 equal in number and corresponding in position to the first grooves 2 are reserved on the first plastic coating body 3. Thus, when the first plastic coating body 3 is plastically coated with the second plastic coating body 5 for the second time, through the cooperation of the corresponding structures on the second plastic coating body 5 and the plurality of second grooves 4, the thickness of some positions increases when the two plastic flows converge. When subjected to temperature shock, no cracking phenomenon will occur. By adopting double plastic coating, the number of parts and the assembly process are saved.
[0022] Embodiment 2
[0023] On the basis of Embodiment 1, as Figure 4 shown, a stator plastic coating structure for preventing cracking of the present utility model, wherein the first plastic coating body 3 and the stator plastic coating structure 6 are both integrally formed structures;
[0024] As Figure 3 shown, the positions of the plurality of glue inlets 7 are optimized and adjusted;
[0025] In this embodiment, when the first plastic coating body 3 is plastically coated with the stator plastic coating structure 6 for the second time, by arranging the plurality of glue inlets 7 between the plurality of ribs 8, when plastic is injected, the weld line generated when the two plastic flows converge will be controlled on the ribs 8 of the stator's second plastic coating. Since the ribs 8 are thicker than other positions, when subjected to temperature shock, no cracking phenomenon will occur. By making full use of the existing structure, the cracking problem caused by too thin wall thickness during plastic coating is solved, the use of sealing rings or bolt components is avoided, there is no aging of the sealing ring and no decrease in screw torque, the cracking problem is improved, and it is beneficial to improve the service life of the stator plastic coating structure.
[0026] For a stator plastic coating structure for preventing cracking of the present utility model, when it works, when the stator 1 is plastically coated with the first plastic coating body 3 for the first time, a plurality of second grooves 4 equal in number and corresponding in position to the first grooves 2 are reserved on the first plastic coating body 3. When the first plastic coating body 3 is plastically coated with the stator plastic coating structure 6 for the second time, by arranging the plurality of glue inlets 7 between the plurality of ribs 8, when plastic is injected, the weld line generated when the two plastic flows converge will be controlled on the ribs 8 of the stator's second plastic coating.
[0027] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.
Claims
1. An anti-cracking stator plastic coating structure, comprising a stator (1) and multiple groups of first grooves (2), the multiple groups of first grooves (2) are circumferentially and equidistantly arranged on the inner side wall of the stator (1); characterized in that, It further includes a first plastic coating body (3), a second groove (4) and a second plastic coating body (5). Multiple groups of the second grooves (4) are respectively circumferentially arranged on the inner side walls of multiple groups of the first plastic coating bodies (3), and the positions of multiple groups of the second grooves (4) are the same as those of multiple groups of the first grooves (2). The first plastic coating body (3) is arranged on the outer side wall of the stator (1), and the second plastic coating body (5) is arranged on the outer side wall of the first plastic coating body (3).
2. The anti-cracking stator plastic coating structure according to claim 1, wherein, The second plastic coating body (5) includes a stator plastic coating structure (6), a glue inlet (7) and a rib (8). Multiple groups of the glue inlets (7) are all arranged on the outer side wall of the top surface of the stator plastic coating structure (6), multiple groups of the ribs (8) are all circumferentially arranged on the inner side wall of the stator plastic coating structure (6), the positions of multiple groups of the ribs (8) and multiple groups of the glue inlets (7) are arranged alternately, and the positions and quantities of multiple groups of the ribs (8) match those of multiple groups of the second grooves (4).
3. A stator plastic coating structure for preventing cracking as described in claim 1, characterized in that, Both the first plastic coating body (3) and the stator plastic coating structure (6) are integrally formed structures.
4. The stator plastic coating structure for preventing cracking according to claim 2, characterized in that, The positions of multiple groups of the glue inlets (7) are optimized and adjusted.