Stress release buffer structure

Abstract

The utility model relates to the related technical field of fan structures, in particular to a stress release buffer structure, which comprises a resin fan blade, a shaft core and a motor shell part, the resin fan blade comprises a resin part and a fan blade part, the resin part wraps and fixes the periphery of the motor shell part, the resin part wraps and fixes one end of the shaft core, and the fan blade part wraps and fixes the other end of the shaft core. A stress release structure is arranged at the joint of the motor shell part and the resin part, the stress release structure comprises a buffer convex block arranged at the end part of the motor shell part and a buffer groove formed in the end part of the resin part, and the stress release structure analyzes the fluidity of the resin to capture the position of a confluence mark, so that the flow of the resin can be detected. And the position is adjusted into a stress release structure, so that the problem of confluence mark cracking caused by temperature influence is solved, and the use effect of the fan blade of the fan is ensured.

Description

Technical Field

[0001] The utility model relates to a release buffer structure, in particular to a stress release buffer structure, and belongs to the technical field related to fan structures. Background Art

[0002] The connection between the fan blades and the shaft core will form a resin part. The resin molding process in the resin part is affected by the number of gates. After the resin enters the mold cavity from the gate, a confluence mark will be formed at the welding point of the two resins. The position of the confluence mark is caused by welding, so this position often cannot achieve the expected strength required by the design. Especially when the resin and other materials are overmolded, due to the different thermal expansion coefficients of the two materials, when the product has strict requirements on the environment, it usually cracks at the confluence mark. This is an important reason for the failure of fan products in the industry.

[0003] Therefore, there is an urgent need to improve the existing connection structure between the shaft core and the fan blades to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of the utility model is to provide a stress release buffer structure, which can alleviate the problem of stress release caused by thermal expansion and improve the service life of the fan blades by setting a stress release structure at the connection between the resin part and the motor shell part according to actual use needs.

[0005] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0006] A resin fan blade, the resin fan blade comprising a fan blade portion and a resin portion, the resin portion being integrally formed and fixedly connected to a middle portion of the fan blade portion;

[0007] An axis core, one end of which is fixedly connected to the resin portion and is wrapped by the resin portion;

[0008] A motor housing, wherein the entire periphery of the motor housing is wrapped and fixed by the middle portion of the resin portion;

[0009] A stress release structure, wherein the number of the stress release structures is set to be a plurality, and the stress release structure is arranged at the connection between the end of the motor housing and the end of the resin part.

[0010] Preferably, the stress release structure includes a buffering protrusion arranged at the end of the motor shell and a buffering groove arranged at the end of the resin part, and the buffering protrusion is cooperatedly arranged in the buffering groove at a corresponding position.

[0011] Preferably, the number of the stress release structures is set to at least three, a plurality of the buffer bumps are evenly distributed circumferentially on the motor housing, and a plurality of the buffer grooves are correspondingly and evenly distributed circumferentially on the resin portion.

[0012] Preferably, the buffer groove is provided with a length greater than the buffer protrusion.

[0013] Preferably, the end of the buffer protrusion is arc-shaped.

[0014] Preferably, the buffer groove is integrally formed with the resin portion, and the buffer protrusion is integrally formed with the motor housing portion.

[0015] The utility model has at least the following beneficial effects:

[0016] 1. This structure uses a buffer bump and a buffer groove to form a stress release structure. The stress release structure finds the location of the confluence mark by analyzing the resin fluidity, and combines the two materials near the location to adjust it to a separate structure. This can reduce the problem of stress that cannot be released due to thermal expansion, thereby solving the crack problem caused by the environment after the injection molding of multiple materials that are tightly fitted in the field.

[0017] 2. The buffer bumps and buffer grooves in the stress release structure can be integrally formed with the motor housing and the resin portion, respectively. The molding is convenient, the setting is easy, the cost is low, and it is suitable for mass production processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 A schematic diagram of the overall external structure of the resin fan blade provided by the utility model;

[0020] Figure 2 A schematic diagram of the internal structure of the resin fan blade provided by the utility model;

[0021] Figure 3 for Figure 1 A part of the enlarged schematic diagram;

[0022] Figure 4 for Figure 2 An enlarged schematic diagram of part B in FIG.

[0023] In the figure, 1. shaft core; 2. motor shell; 3. resin part; 4. stress release structure; 5. buffer bump; 6. buffer groove; 7. fan blade part; 8. resin fan blade. DETAILED DESCRIPTION

[0024] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0025] like Figures 1 to 4 As shown, the stress release buffer structure provided in this embodiment includes a resin fan blade 8, an axis core 1 and a motor shell 2, wherein the resin fan blade 8 includes a fan blade portion 7 and a resin portion 3, the resin portion 3 is integrally formed and fixedly connected to the middle portion of the fan blade portion 7, one end of the axis core 1 is fixedly connected to the resin portion 3 and the end is wrapped by the resin portion 3, the outer periphery of the motor shell 2 is wrapped and fixed by the middle portion of the resin portion 3, and the purpose of wrapping the resin portion 3 around the motor is to reduce the eccentricity problem caused by the process of assembling the rotating body. Theoretically, the process is simplified while the stability is guaranteed, the resin portion 3 is wrapped with the axis core 1 to stabilize the central axis stress release structure 4, and the number of stress release structures 4 is set to be a number, and the stress release structure 4 is arranged at the connection between the end of the motor shell 2 and the end of the resin portion 3.

[0026] Preferably, see Figures 1 to 4 The stress release structure 4 includes a buffering protrusion 5 arranged at the end of the motor shell 2 and a buffering groove 6 arranged at the end of the resin part 3. The buffering protrusion 5 is cooperated with the buffering groove 6 arranged at the corresponding position. The two materials are combined and designed near this position and adjusted to a separate structure, which can provide a stress release function, reduce the bearing pressure of the fan blade rotation, ensure the use effect of the fan blade, and improve the service life of the fan blade.

[0027] Preferably, see Figure 1 , Figure 2 The number of the stress release structures 4 is set to be at least three, a number of the buffer bumps 5 are evenly distributed on the motor housing 2, and a number of the buffer grooves 6 are correspondingly and evenly distributed on the resin part 3. A number of circumferentially evenly distributed stress release structures 4 can ensure the release effect while reducing the manufacturing cost, and realize simple and effective functions. The number of stress release structures 4 can be determined according to the number of gates according to demand.

[0028] Preferably, the buffer groove 6 is provided with a length greater than the buffer protrusion 5 , and the end of the buffer protrusion 5 is in an arc shape, so as to ensure that the buffer protrusion 5 can better cooperate with the buffer groove 6 .

[0029] Preferably, the buffer groove 6 is integrally formed with the resin portion 3 , and the buffer protrusion 5 is integrally formed with the motor housing 2 . This arrangement facilitates the manufacture and assembly of the stress release structure 4 .

[0030] like Figures 1 to 4 As shown, the principle of the stress release buffer structure provided in this embodiment is as follows: the motor shell 2 rotates downwardly under the belt of the fan drive structure, and centrifugal pressure is generated on the resin part 3 during rotation. The buffer groove 6 can analyze the fluidity of the resin, find the position of the confluence mark, and cooperate with the buffer protrusion 5 to form a separate structure. The rotational pressure of the resin part 3 is buffered by the cooperation of the buffer protrusion 5 and the buffer groove 6. The buffer groove 6 can provide a buffer space to accommodate thermal expansion to alleviate the problem of stress that cannot be released due to thermal expansion.

Claims

1. A stress release buffer structure, characterized in that: include: A resin fan blade (8), the resin fan blade (8) comprising a fan blade portion (7) and a resin portion (3), the resin portion (3) being integrally formed and fixedly connected to a middle portion of the fan blade portion (7); An axis core (1), one end of the axis core (1) being fixedly connected to the resin portion (3) and the end being wrapped by the resin portion (3); A motor housing (2), wherein the entire periphery of the motor housing (2) is wrapped and fixed by the middle portion of the resin portion (3); A stress release structure (4), wherein the number of the stress release structures (4) is set to be a plurality, and the stress release structure (4) is arranged at a connection between an end of the motor housing (2) and an end of the resin part (3).

2. A stress release buffer structure according to claim 1, characterized in that: The stress release structure (4) comprises a buffering protrusion (5) arranged at the end of the motor housing (2) and a buffering groove (6) arranged at the end of the resin part (3), and the buffering protrusion (5) is arranged in cooperation with the buffering groove (6) at a corresponding position.

3. A stress release buffer structure according to claim 2, characterized in that: The number of the stress release structures (4) is set to at least three, a plurality of the buffer bumps (5) are evenly distributed circumferentially on the motor housing (2), and a plurality of the buffer grooves (6) are correspondingly and evenly distributed circumferentially on the resin portion (3).

4. A stress release buffer structure according to claim 3, characterized in that: The buffer groove (6) is provided with a length greater than the buffer protrusion (5).

5. A stress release buffer structure according to claim 3, characterized in that: The end of the buffer protrusion (5) is in an arc shape.

6. A stress release buffer structure according to claim 2, characterized in that: The buffer groove (6) is integrally formed with the resin portion (3), and the buffer protrusion (5) is integrally formed with the motor housing portion (2).

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