Steel shaft disc and drop-resistant plastic cross flow pipe

Abstract

The utility model relates to the technical field of plastic cross-flow fans, in particular to a steel shaft disc and a drop-resistant plastic cross-flow fan. A steel shaft disc comprises a plastic disc body and a steel shaft, the center of the plastic disc body wraps the end of the steel shaft through integral injection molding, and a damping piece is arranged at the end of the steel shaft. The damping piece is fixedly arranged at the end of the steel shaft, and the end of the steel shaft and the damping piece on the steel shaft are wrapped in the plastic tray body. The scheme has the advantages that the structural stability is improved, the impact resistance is enhanced, and the product reliability and durability are improved.

Description

Technical Field

[0001] This utility model relates to the field of plastic cross-flow fan technology, and in particular to a steel shaft disc and a shock-resistant plastic cross-flow fan. Background Technology

[0002] Traditional plastic cross-flow fans are widely used in ventilation and air conditioning, humidifiers, and communication base stations. The structural stability of their core component, the plastic cross-flow fan, directly affects the equipment's operating efficiency and lifespan. In existing technologies, plastic cross-flow fans typically transmit power through a combination of a steel shaft and a plastic body. However, this method suffers from several significant problems: The steel shaft end is prone to cracking. Due to the lack of a buffer structure at the connection between the steel shaft and the plastic body, when the fan is dropped vertically, the axial impact force on the steel shaft end is directly transmitted to the plastic body, causing stress concentration and making it highly susceptible to cracking. This not only affects product reliability but also significantly increases the scrap rate during production. Insufficient structural strength is another issue. Traditional steel shaft discs lack effective reinforcement designs (such as reinforcing ribs or conical truncated pyramids), resulting in weak overall drop resistance. Especially under high-speed operation or accidental collisions, the disc is prone to deformation or cracking, affecting the dynamic balance and lifespan of the cross-flow fan. Therefore, a technical solution that balances lightweight design, high impact resistance, and process feasibility is urgently needed to improve the structural stability and durability of plastic cross-flow fans. To address the aforementioned issues, existing technologies urgently need improvement. Summary of the Invention

[0003] To address the aforementioned problems, the purpose of this invention is to provide a steel shaft disc and a shock-resistant plastic flow tray, which has the advantages of improving structural stability, enhancing impact resistance, and increasing product reliability and durability.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This application provides a steel shaft disk, the technical solution of which is as follows:

[0006] A steel shaft disc includes a plastic disc body and a steel shaft. The center of the plastic disc body is integrally injection molded to cover the end of the steel shaft. A shock-absorbing plate is provided at the end of the steel shaft. The shock-absorbing plate is fixedly disposed at the end of the steel shaft, and the end of the steel shaft and the shock-absorbing plate thereon are covered by the plastic disc body.

[0007] Furthermore, this application also proposes that the damping pad is injection molded and encapsulated at the center of the thickness of the plastic disc.

[0008] Furthermore, this application also proposes that a first annular groove is provided on the end of the steel shaft, and the damping plate is an annular structure with its inner ring inserted and fixed in the first annular groove.

[0009] Furthermore, this application also proposes that the outer surface of the end of the steel shaft is constructed as a tapered surface, with a first annular groove located on the tapered surface; the damping pad is gradually inserted and fixed into the first annular groove under the guidance of the tapered surface.

[0010] Furthermore, this application also proposes that a bushing be formed by injection molding at the center of the inner end face of the plastic disc, and the end of the steel shaft be fixed inside the bushing by injection molding, with the bushing completely covering the end of the steel shaft.

[0011] Furthermore, this application also proposes that the end of the steel shaft is provided with a second annular groove inside the first annular groove; a boss is injection molded at the center of the outer end face of the plastic disc, and the plastic material in the boss is embedded in the second annular groove.

[0012] Furthermore, this application also proposes that a conical platform and multiple reinforcing ribs are integrally connected to the inner end face of the plastic disc body, with the conical platform centered on the bushing portion; the multiple reinforcing ribs are arranged circumferentially with the bushing portion as the center, and are radially arranged on the conical platform along the plastic disc body, with the inner ends of the reinforcing ribs integrally connected to the bushing portion.

[0013] Furthermore, this application also proposes that the outer diameter of the damping pad is smaller than the outer diameter of the conical truss.

[0014] Furthermore, this application also proposes that multiple blade mating grooves are provided on the inner end face of the plastic disc body, and the multiple blade mating grooves are regularly arranged on the outer end of the inner end face along the same circumferential surface; the cross-section of the blade mating groove is arc-shaped, and blade mating ribs are provided on the bottom surface of the groove.

[0015] As can be seen from the above, the steel shaft disc and impact-resistant plastic cross-flow provided in this application effectively alleviate axial impact force and avoid stress concentration in the plastic part by integrally injection molding the end of the steel shaft and setting shock-absorbing pads. At the same time, through the structural design of reinforcing ribs, conical platform and other structures, the overall drop resistance and structural stability are significantly improved. It has the advantages of improving structural stability, enhancing impact resistance, and improving product reliability and durability. Attached Figure Description

[0016] Figure 1 A top-view perspective view of a steel shaft disk provided in this application.

[0017] Figure 2 A perspective view of the bottom surface of a steel shaft disk provided in this application.

[0018] Figure 3 This is a cross-sectional schematic diagram of a steel shaft disc provided in this application.

[0019] Figure 4 This is a three-dimensional sectional view of a steel shaft disk provided in this application.

[0020] Figure 5 for Figure 4 Enlarged view of part A. Detailed Implementation

[0021] 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.

[0022] 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", "clockwise", "counterclockwise", etc., 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, and 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. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] 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.

[0026] Example 1:

[0027] like Figure 1-5 As shown, this embodiment relates to a steel shaft disc, including a plastic disc body 1 and a steel shaft 2. The center of the plastic disc body 1 is integrally injection molded over the end of the steel shaft 2, and a damping plate 4 is provided at the end of the steel shaft 2. The damping plate 4 is fixedly disposed at the end of the steel shaft 2, and the end of the steel shaft 2 and the damping plate 4 thereon are encased within the plastic disc body 1. The damping plate 4 can be made of rigid materials such as iron sheets, and its shape can be annular, sheet-like, or other suitable shapes. The damping plate 4 can be fixed to the end of the steel shaft 2 by means of bonding, snap-fitting, or injection molding. This technical solution, by providing a damping plate 4 at the end of the steel shaft 2, effectively buffers the impact force at the connection between the steel shaft 2 and the plastic disc body 1, preventing the end of the steel shaft 2 from cracking due to stress concentration. The plastic disc body 1, by integrally injection molding over the end of the steel shaft 2 and the damping plate 4, enhances the stability and durability of the overall structure. Compared with the prior art, the technical solution of this application significantly improves the impact resistance of the steel shaft disc, solves the technical problem of easy cracking at the ends of the steel shaft, and maintains the lightweight structure and the feasibility of the process.

[0028] like Figure 3 and 5As shown, the damping pad 4 is injection molded and positioned at the center of the plastic disc body 1's thickness. Specifically, the center position of the damping pad 4 is achieved as follows: First, during the injection molding process of the plastic disc body 1, the damping pad 4 is pre-positioned at the center of the mold. Then, the plastic material is evenly wrapped around the damping pad 4 through the injection molding process, ensuring that the damping pad 4 is located at the center of the disc body's thickness. By placing the damping pad 4 at the center of the plastic disc body 1's thickness, its uniform distribution throughout the disc body is ensured, effectively absorbing and dispersing the impact force from the steel shaft 2, thus enhancing the overall impact resistance and stability of the steel shaft disc. This design not only improves the product's durability but also reduces the risk of cracking in the plastic disc body 1 due to stress concentration. Compared with existing technologies, this technical solution significantly improves the structural stability and impact resistance of the steel shaft disc by optimizing the position and fixing method of the damping pad 4, solving the problems of easy cracking at the end of the steel shaft 2 and insufficient structural strength in traditional technologies.

[0029] like Figure 5 As shown, a first annular groove 5 is provided on the end of the steel shaft 2, and the damping plate 4 has an annular structure, with its inner ring inserted and fixed within the first annular groove 5. The design of the first annular groove 5 allows the damping plate 4 to form a tight insertion and fixation with the end of the steel shaft 2 through its inner ring, thereby enhancing the stability of the connection between the two. The annular structure of the damping plate 4 can effectively disperse and absorb the vibration and impact force generated by the steel shaft 2 during operation, avoiding loosening or detachment due to unstable connection. As a preferred embodiment, the depth and width of the first annular groove 5 can be optimized according to the size and material properties of the damping plate 4 to ensure the firmness of the insertion and fixation and maximize the damping effect. Thus, this technical solution achieves a stable connection between the steel shaft 2 and the damping plate 4 through the mutual cooperation of the first annular groove 5 and the annular structure of the damping plate 4. This design not only improves the reliability of the overall structure but also extends the service life of the steel shaft disc, especially in high vibration or impact environments, effectively avoiding cracking at the end of the steel shaft 2 and stress concentration in the plastic body. Compared with existing technologies, this solution significantly improves the impact resistance and durability of the steel shaft disc while maintaining a simple structure and feasible process.

[0030] Furthermore, the outer surface of the end of the steel shaft 2 is constructed as a tapered surface 6, with a first annular groove 5 located on the tapered surface 6. The damping plate 4 is gradually inserted and fixed into the first annular groove 5 under the guidance of the tapered surface 6. The design of the tapered surface 6 allows the damping plate 4 to be gradually inserted along the tapered surface 6 during installation, thus simplifying the installation process. Specifically, the inclination angle of the tapered surface 6 can be adjusted according to actual needs to ensure that the damping plate 4 can be smoothly inserted and fixed into the first annular groove 5. As a preferred embodiment, the inclination angle of the tapered surface 6 can be between 5° and 15° to provide optimal guiding effect. Therefore, the design of the tapered surface 6 not only provides guidance for the installation of the damping plate 4 but also ensures a stable connection between the damping plate 4 and the end of the steel shaft 2. Thus, this design effectively solves the technical problem of installation difficulties caused by the lack of a guiding structure during the installation of the end of the steel shaft 2 and the damping plate 4. Furthermore, the tapered surface 6 also forms a buffer slope, thereby increasing the drop resistance of the steel shaft disc. Therefore, this technical solution not only simplifies the installation process, but also improves the overall structural stability and durability of the steel shaft disc.

[0031] like Figure 2 and 3 As shown, a bushing 7 is injection molded at the center of the inner end face of the plastic disc 1. The end of the steel shaft 2 is fixed inside the bushing 7 by injection molding, and the bushing 7 completely covers the end of the steel shaft 2. The bushing 7 can be formed by injection molding, that is, a mold cavity is reserved at the center of the inner end face of the plastic disc 1, and molten plastic material is injected into the mold cavity by an injection molding machine. After cooling, the bushing 7 is formed. The end of the steel shaft 2 is placed in the mold cavity during the injection molding process, so that the plastic material completely covers the end of the steel shaft 2 after cooling, thereby achieving a firm connection between the steel shaft 2 and the plastic disc 1. The thickness of the bushing 7 can be adjusted according to actual needs to ensure that it has sufficient strength and impact resistance. In addition, the inner wall of the bushing 7 can be designed to fit tightly with the end of the steel shaft 2 to further enhance the stability of the connection. In this way, the design of the bushing 7 effectively disperses the impact force on the end of the steel shaft 2, reduces stress concentration, and thus prevents the plastic disc 1 from cracking at the connection point of the steel shaft 2. The bushing 7 completely covers the end of the steel shaft 2, which not only enhances the connection strength between the steel shaft 2 and the plastic disc 1, but also improves product reliability and reduces the scrap rate during production. Compared with existing technologies, this solution significantly improves the overall performance of the steel shaft disc through simple structural improvements, demonstrating high practicality and innovation.

[0032] Furthermore, a second annular groove 8 is provided inside the first annular groove 5 at the end of the steel shaft 2. A boss 9 is injection molded at the center of the outer end face of the plastic disc 1, and the plastic material in the boss 9 is embedded in the second annular groove 8. The second annular groove 8 increases the connection area between the steel shaft 2 and the plastic disc 1, thereby improving the connection strength. The injection molding of the boss 9 allows the plastic material to be tightly embedded in the second annular groove 8, further enhancing the connection firmness between the steel shaft 2 and the plastic disc 1. Specifically, the depth and width of the second annular groove 8 can be adjusted according to actual needs to ensure that the plastic material can be fully filled and form a stable connection structure. As a preferred embodiment, the cross-sectional shape of the second annular groove 8 can be rectangular, trapezoidal, or other suitable shapes to optimize the connection effect. Thus, this technical solution effectively solves the problem of insufficient structural strength at the connection between the plastic disc 1 and the steel shaft 2 by adding the second annular groove 8 and the boss 9. Compared with the prior art, this design not only improves the impact resistance of the connection part but also enhances the stability of the overall structure, thereby extending the service life of the product. Specifically, the combination of the second annular groove 8 and the boss 9 makes the connection between the plastic disc 1 and the steel shaft 2 more uniform, reduces stress concentration, and avoids cracking and deformation at the connection point. Therefore, this technical solution has significant advantages in improving product reliability and durability.

[0033] Furthermore, this application proposes that the inner end face of the plastic disc 1 is provided with a conical platform 13 and multiple reinforcing ribs 14 integrally connected thereto, with the conical platform 13 centered on the bushing portion 12. The multiple reinforcing ribs 14 are circumferentially arranged around the bushing portion 12 and radially positioned on the conical platform 13 along the plastic disc 1, with the inner ends of the reinforcing ribs 14 integrally connected to the bushing portion 12. Specifically, the design of the conical platform 13, centered on the bushing portion 12, provides a stable support structure that can effectively disperse and absorb external impact forces. The circumferential and radial arrangement of the reinforcing ribs 14 further enhances the deformation resistance of the disc. The integral connection of the inner ends of the reinforcing ribs 14 to the bushing portion 12 ensures the integrity and stability of the entire structure. For example, the conical platform 13 can be integrally formed with the plastic disc 1 through injection molding, while the reinforcing ribs 14 can be implemented by setting a corresponding mold structure during the injection molding process. As a preferred embodiment, the thickness and width of the reinforcing rib 14 can be optimized according to the stress conditions in actual applications to further improve structural strength. This technical solution effectively solves the problem of insufficient structural strength of the plastic disc 1 by setting the conical platform 13 and the reinforcing rib 14. The cooperation between the conical platform 13 and the reinforcing rib 14 not only improves the impact resistance and durability of the disc but also ensures the integrity and stability of the entire structure. Compared with existing technologies, this solution significantly improves the deformation resistance and impact resistance of the plastic disc 1 through optimized structural design, thereby extending the product's service life.

[0034] Furthermore, the outer diameter of the damping plate 4 is smaller than that of the conical platform 13. This design ensures that the damping plate 4 can effectively absorb and disperse impact forces without affecting the structural integrity of the conical platform 13. Through this dimensional matching, the damping plate 4 can better perform its damping function under the protection of the conical platform 13, thereby improving the structural stability and durability of the entire steel shaft disc. Thus, this technical solution solves the structural stability problem caused by improper dimensional matching between the damping plate 4 and the conical platform 13 through precise dimensional matching. Compared with the prior art, the design of this application not only improves the impact resistance of the steel shaft disc but also extends its service life and reduces failures and maintenance costs caused by structural instability.

[0035] like Figure 2As shown, multiple blade docking grooves 15 are provided on the inner end face of the plastic disc 1, and these grooves 15 are regularly arranged along the same circumferential surface on the outer end of the inner end face. The cross-section of the blade docking groove 15 is arc-shaped, and blade docking ribs are provided on the bottom surface of the groove. Specifically, the arc-shaped cross-section of the blade docking groove 15 better adapts to the shape of the blade, ensuring a tight contact between the blade and the plastic disc 1. The blade docking ribs provided on the bottom surface of the groove further enhance the connection strength between the blade and the plastic disc 1, preventing the blade from loosening or falling off during high-speed operation or impact. In addition, the number and distribution of the blade docking grooves 15 can be adjusted according to actual needs to ensure uniformity and stability during blade docking. In this regard, the technical solution of this application effectively improves the structural stability of the plastic disc 1 and blade docking by providing multiple blade docking grooves 15 on the inner end face and adopting an arc-shaped cross-section and blade docking ribs. This design not only solves the problem of easy loosening or falling off of the blade docking part in the traditional technology, but also enhances the impact resistance of the overall structure. Compared with the prior art, the technical solution of this application simplifies the manufacturing process and improves the reliability and service life of the product while ensuring structural stability.

[0036] Example 2:

[0037] This embodiment also proposes a drop-resistant plastic cross-flow fan 10, which includes the steel shaft disc described in Embodiment 1. Specifically, the steel shaft disc design, through the setting of shock-absorbing pads 4, effectively buffers the axial impact force borne by the end of the steel shaft 2 during a drop, reducing stress concentration in the plastic parts and thus preventing cracking. In addition, by setting the conical platform 13 and reinforcing ribs 14, the overall drop resistance is enhanced, improving the structural stability and durability of the cross-flow fan. The combination of the plastic disc body 1 and the steel shaft 2 further ensures the structural robustness and impact resistance. Thus, the technical solution of this application, by introducing a steel shaft disc, solves the problems of easy cracking of the end of the steel shaft 2 and insufficient structural strength in traditional plastic cross-flow fans during vertical drops. The design of the steel shaft disc not only effectively buffers the impact force but also improves the overall drop resistance through strengthened structural design, thereby improving the reliability and service life of the cross-flow fan.

[0038] 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. In this specification, the illustrative expressions of the above terms do not necessarily refer 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.

[0039] 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 without departing from the principles and spirit of the present invention.

Claims

1. A steel axle disc comprising a plastic disc body (1) and a steel axle (2), characterized in that: - the end of the steel axle (2) is covered by the plastic disc body (1) at the center of the plastic disc body (1) by one-piece injection molding, and the end of the steel axle (2) is provided with a shock pad (4); - the shock pad (4) is fixedly arranged on the end of the steel axle (2), and the end of the steel axle (2) and the shock pad (4) thereon are covered in the plastic disc body (1).

2. The steel axle disc according to claim 1, characterized in that: - the shock pad (4) is injection molded and covered at the center of the disc thickness of the plastic disc body (1).

3. The steel axle disc according to claim 1, characterized in that: - the end of the steel axle (2) is provided with a first annular groove (5), and the shock pad (4) is an annular structure, and the inner ring of the shock pad (4) is fixedly inserted into the first annular groove (5).

4. The steel axle disc according to claim 3, characterized in that: - the outer surface of the end of the steel axle (2) is constructed as a tapered surface (6), and the first annular groove (5) is located on the tapered surface (6); and the shock pad (4) is gradually inserted and fixed into the first annular groove (5) under the guidance of the tapered surface (6).

5. The steel axle disc according to claim 1, characterized in that: - a shaft sleeve (7) is injection molded at the center of the inner end face of the plastic disc body (1), the end of the steel axle (2) is injection molded and fixed in the shaft sleeve (7), and the shaft sleeve (7) completely covers the end of the steel axle (2).

6. The steel axle disc according to claim 3, characterized in that: - the end of the steel axle (2) is further provided with a second annular groove (8) inside the first annular groove (5); - a boss (9) is injection molded at the center of the outer end face of the plastic disc body (1), and the plastic material in the boss (9) is embedded into the second annular groove (8).

7. The steel axle disc according to claim 1, characterized in that: - a tapered platform (13) and a plurality of reinforcing ribs (14) are provided on the inner end face of the plastic disc body (1) and integrated with the inner end face, and the tapered platform (13) is centered on a shaft sleeve portion (12); - the plurality of reinforcing ribs (14) are circumferentially arranged around the shaft sleeve portion (12) and provided on the tapered platform (13) in the radial direction of the plastic disc body (1), and the inner end portion of the reinforcing rib (14) is integrally connected to the shaft sleeve portion (12).

8. The steel axle disc according to claim 7, characterized in that: - the outer diameter of the shock pad (4) is smaller than the outer diameter of the tapered platform (13).

9. The steel axle disc according to claim 7, characterized in that: - a plurality of blade butt joints (15) are provided on the inner end face of the plastic disc body (1), and the plurality of blade butt joints (15) are regularly arranged on the outer end portion of the inner end face along the same circumferential surface; - the cross section of the blade butt joint (15) is in the shape of a circular arc, and a blade butt joint rib is provided on the bottom surface of the blade butt joint (15). including: the steel axle disc according to any one of claims 1-9. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 10. A shatter-resistant plastic run, characterized by, ​ ​

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