Rubber nail and fan volute

Abstract

The utility model belongs to the technical field of fan volutes, and particularly discloses a rubber nail and a fan volute. The rubber nail comprises a supporting guide column and a rubber outer sleeve, the supporting guide column is coated with the rubber outer sleeve, a first boss is arranged at one end of the rubber outer sleeve in the axial direction of the supporting guide column and extends and protrudes in the radial direction of the rubber outer sleeve, and a containing groove is formed in the supporting guide column. And at least part of the rubber jacket connected with the first boss can be accommodated in the accommodating groove. The rubber nail disclosed by the utility model is easy to push and assemble, the falling risk is reduced, the fan volute can be prevented from being cracked, slipped and the like, and the service life of the fan volute is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine volute technology, and in particular to rubber nails and wind turbine volutes. Background Technology

[0002] The fan casing consists of side panels and two side covers. The side panels and covers are typically fixed using a combination of screws and nuts, or self-tapping screws. For plastic fan casings, tightening these screws and nuts or self-tapping screws requires a high level of skill from the assembler. Excessive screwdriver torque or misalignment can easily cause cracks at the tightening points, resulting in subtle, hidden damage. Furthermore, repeated assembly can lead to stripping of the screw threads, rendering the product unusable. To address these issues, some fan casings employ a rubber nail structure. A rubber sleeve is fitted over a metal nail, with circumferentially protruding retaining rings at both ends. During assembly, the rubber nail is passed through the mounting hole until the two retaining rings abut against the cover and side panels respectively, thus connecting the cover and side panels. To ensure a secure connection, the gap between the metal nail and the mounting hole is usually smaller than the thickness of the rubber sleeve, resulting in significant resistance to the rubber nail during assembly and making installation more difficult. Utility Model Content

[0003] The first technical problem solved by this utility model is to provide a rubber nail that can solve the problems of insufficient reliability of existing rubber nail connections, easy detachment after long-term use or under external force, and difficulty in installation and easy damage during interference fit installation.

[0004] The second technical problem solved by this utility model is to provide a fan volute with rubber nails that are not easy to fall off or be damaged, easy to install, and improve the connection strength of the plastic fan volute.

[0005] The first technical problem mentioned above is solved by the following technical solution:

[0006] A rubber nail is provided, including a support guide post and a rubber sleeve. The rubber sleeve covers the support guide post and has a first boss at one end along the axial direction of the support guide post. The first boss extends radially outward from the rubber sleeve. A receiving groove is provided on the support guide post. When the first boss is squeezed by an external force, the rubber sleeve connected to the first boss is at least partially received in the receiving groove.

[0007] Compared with the prior art, the rubber nail of this utility model has the following advantages: The rubber nail includes a support guide post and a rubber sleeve, with the rubber sleeve covering the support guide post. The support guide post provides support for the rubber sleeve, giving the rubber nail a certain degree of hardness for easy installation. Along the axial direction of the support guide post, one end of the rubber sleeve is provided with a first boss, which extends radially outward from the rubber sleeve. A receiving groove is provided on the support guide post. When the first boss is compressed by external force, the rubber sleeve deforms, so that at least part of the rubber sleeve connected to the first boss is received in the receiving groove, thereby reducing the friction between the rubber nail and the mounting hole, making it easier to push the rubber nail in and facilitating installation. Furthermore, because the rubber sleeve is elastic, after the rubber nail is installed in place, the rubber sleeve returns to its original shape, and the first boss abuts against the connected object. Due to the large radial dimension of the first boss, it can prevent the rubber nail from falling out of the mounting hole during long-term use or under external pulling force, increasing the connection reliability of the rubber nail.

[0008] In one embodiment, the receiving groove is formed on the periphery of the support guide post, and the opening width of the receiving groove extends along the axial direction of the support guide post; in the same projection plane parallel to the axis of the support guide post, the first boss and the receiving groove at least partially overlap.

[0009] In one embodiment, along the axial direction of the support guide post, the receiving groove has a first annular sidewall and a second annular sidewall, the cross-sectional area of ​​the first annular sidewall gradually increasing from one end near the second annular sidewall to one end away from the second annular sidewall, and the cross-sectional area of ​​the second annular sidewall gradually increasing from one end near the first annular sidewall to one end away from the first annular sidewall.

[0010] In one embodiment, both the first annular sidewall and the second annular sidewall are conical surfaces, and the taper of the first annular sidewall is smaller than the taper of the second annular sidewall; and / or,

[0011] The first annular sidewall is connected to the second annular sidewall.

[0012] In one embodiment, the end of the first annular sidewall away from the second annular sidewall extends to the top of the support post.

[0013] In one embodiment, the first boss has a conical end, and the other end face of the first boss away from the conical end and the junction of the first annular sidewall and the second annular sidewall are located in the same plane.

[0014] In one embodiment, the rubber jacket has a through-hole for venting, and the air inlet of the vent is connected to the receiving groove.

[0015] In one embodiment, the first boss has a conical end and an exhaust hole therein. The exhaust end of the exhaust hole is opened on the conical side of the conical end, and the intake end of the exhaust hole extends to the rubber sleeve to communicate with the receiving groove.

[0016] In one embodiment, a second boss is provided at the other end of the rubber jacket away from the first boss, the second boss extending radially outward from the rubber jacket.

[0017] The second technical problem mentioned above is solved by the following technical solution:

[0018] A fan volute is provided, including the aforementioned rubber nail. The fan volute also includes a cover plate and a volute body, and the rubber nail is connected to the cover plate and the volute body.

[0019] Compared with the prior art, the fan volute described in this utility model has the following advantages: The rubber nails reduce friction between the rubber nails and the cover plate and volute body during installation, facilitating assembly. Furthermore, the first protrusion prevents the rubber nails from falling out of the mounting holes during prolonged use or under external pulling, increasing the structural strength of the fan volute. During installation, the fan volute experiences less stress and does not require a threaded structure, preventing cracking, stripping, and other damage, thus extending its service life. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the rubber nail provided in an embodiment of the present utility model;

[0021] Figure 2 for Figure 1 A structural cross-sectional view along the AA direction in one embodiment;

[0022] Figure 3 for Figure 1 A structural cross-sectional view along the AA direction in another embodiment;

[0023] Figure 4 A partial structural cross-sectional view of the fan volute provided in an embodiment of this utility model.

[0024] Label Explanation:

[0025] 1. Supporting guide post; 11. Receiving groove; 111. First side wall; 112. Second side wall; 2. Rubber sleeve; 21. First boss; 211. Conical end; 22. Second boss; 23. Vent hole;

[0026] 100. Cover plate; 200. Volute body. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] In the description of this application, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "bottom", "inner", "outer", 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 application 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 application.

[0029] 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" and "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] like Figures 1-4 As shown, this embodiment of the utility model first provides a rubber nail for connecting two connecting structural members with through mounting holes. The two connecting structural members are not limited to the cover plate 100 and the volute body 200 of the fan casing, but can also be other equipment that needs to be connected.

[0032] The rubber nail includes a support guide post 1 and a rubber sleeve 2, with the rubber sleeve 2 covering the support guide post 1. The support guide post 1 provides support for the rubber sleeve 2, giving the rubber nail a certain degree of rigidity for installation. Along the axial direction of the support guide post 1, one end of the rubber sleeve 2 is provided with a first boss 21, which extends radially outward from the rubber sleeve 2. The support guide post 1 has a receiving groove 11. When the first boss 21 is compressed by external force, the rubber sleeve 2 deforms, so that at least part of the rubber sleeve 2 connected to the first boss 21 is received within the receiving groove 11, thereby reducing the friction between the rubber nail and the mounting hole, making it easier to push the rubber nail in and facilitating installation. Furthermore, because the rubber sleeve 2 is elastic, after the rubber nail is installed in place, the rubber sleeve 2 returns to its original shape, and the first boss 21 abuts against the connected object. Due to the large radial dimension of the first boss 21, it can prevent the rubber nail from falling out of the mounting hole during prolonged use or under external pulling force, increasing the connection reliability of the rubber nail.

[0033] To improve the support strength of the support guide post 1, the support guide post 1 is made of metal, and the rubber sleeve 2 is made of rubber. This embodiment does not limit the specific types of metal or rubber. To minimize the risk of cracking of the mounting hole under stress, the rubber sleeve 2 needs to have a certain thickness, such as... Figure 3 As shown, the diameter of the support guide post 1 is D1, and the diameter of the rubber nail is D2, where D2 > 2 * D1.

[0034] In one embodiment, the support guide post 1 extends into the interior of the first boss 21, providing better support strength and making the rubber nail structure more stable. A receiving groove 11 is formed on the periphery of the support guide post 1, and the opening width of the receiving groove 11 extends along the axial direction of the support guide post 1. In the same projection plane parallel to the axis of the support guide post 1, the first boss 21 and the receiving groove 11 at least partially overlap. When the first boss 21 is pressed by the inner wall of the mounting hole, the rubber sleeve 2 connected to the first boss 21 is more easily retracted into the receiving groove 11 through its opening.

[0035] The first protrusion 21 extends circumferentially around the rubber sleeve 2, forming an annular protrusion. After the rubber nail passes through the mounting hole, the first protrusion 21 provides better anti-detachment performance. Correspondingly, the receiving groove 11 extends circumferentially around the supporting guide post 1, providing a larger receiving space and further improving the ease of installation of the rubber nail.

[0036] Along the axial direction of the support guide post 1, the receiving groove 11 has a first annular sidewall 111 and a second annular sidewall 112. The cross-sectional area of ​​the first annular sidewall 111 gradually increases from the end near the second annular sidewall 112 to the end away from the second annular sidewall 112. The cross-sectional area of ​​the second annular sidewall 112 gradually increases from the end near the first annular sidewall 111 to the end away from the first annular sidewall 111. That is, along the axial direction of the support guide post 1, both the first annular sidewall 111 and the second annular sidewall 112 are inclined relative to the axial direction.

[0037] Specifically, both the first annular sidewall 111 and the second annular sidewall 112 are conical surfaces, with the taper of the first annular sidewall 111 being smaller than that of the second annular sidewall 112. By using the different tapers of the first annular sidewall 111 and the second annular sidewall 112, the receiving groove 11 can have a certain axial length in the axial direction and a certain size in the radial direction, thus forming a larger volume to accommodate the deformable rubber jacket 2.

[0038] The first annular sidewall 111 is connected to the second annular sidewall 112. For example... Figure 3 As shown, along the axial direction of the support guide post 1, the cross-sectional shape of the receiving groove 11 is triangular. That is, the end of the first annular sidewall 111 away from the opening of the receiving groove 11 connects with the end of the second annular sidewall 112 away from the opening of the receiving groove 11 to form the bottom of the receiving groove 11. The opening of the receiving groove 11 is formed between the end of the first annular sidewall 111 away from the connection and the end of the second annular sidewall 112 away from the connection. Compared with a rectangular annular groove, the opening size of the conical annular groove can be larger, and the bottom connection size is smaller. This not only better guides the first boss 21 into the receiving groove 11, but also minimizes the impact on the structural strength of the support guide post 1.

[0039] Along the axial direction of the supporting guide post 1, the width of the opening of the receiving groove 11 is greater than the length of the first boss 21, providing a larger receiving space. For example... Figure 3 As shown in the figure, L2 is the opening width of the receiving groove 11, L1 is the length of the first boss 21, and L2 > L1.

[0040] The first annular sidewall 111 extends from the bottom of the receiving groove 11 to the top of the support guide post 1. In this way, as the rubber nail is pushed into the mounting hole, the first annular sidewall 111 can better guide the squeezed rubber jacket 2 to gradually enter the receiving groove 11.

[0041] To further improve the ease of installation of the rubber nail, the first boss 21 has a conical end 211. Compared to the cylindrical boss, the conical end 211 is smaller in size, making it easier to pass through the mounting hole; moreover, during the pushing process of the rubber nail installation, the conical side of the conical end 211 can provide guidance, making it easier to adjust the rubber nail to a coaxial position with the mounting hole.

[0042] The other end face of the first boss 21 away from the conical end 211 and the junction of the first annular sidewall 111 and the second annular sidewall 112 are located in the same plane. The junction of the first annular sidewall 111 and the second annular sidewall 112 forms the bottom of the receiving groove 11. The other end of the first boss 21 away from the conical end 211 is the part with the largest radial dimension, while the bottom of the receiving groove 11, which is a conical annular groove, is the part with the largest cross-sectional dimension. By placing the other end face of the first boss 21 away from the conical end 211 and the bottom of the receiving groove 11 in the same plane, the fit between the two is better, and the other end face of the first boss 21 away from the conical end 211 can compress more of the rubber jacket 2 to be accommodated at the bottom of the receiving groove 11.

[0043] In one embodiment, to reduce the obstruction of the rubber sleeve 2 by air in the receiving groove 11, a through vent 23 is provided on the rubber sleeve 2, with the air inlet end of the vent 23 connected to the receiving groove 11. When the first protrusion 21 is compressed, the air in the receiving groove 11 is discharged through the vent 23, allowing the rubber sleeve 2 to be received more smoothly within the receiving groove 11. Figure 1 As shown in the figure, the vent 23 penetrates the rubber jacket 2.

[0044] In another embodiment, the first boss 21 has a conical end 211, and an exhaust hole 23 is provided within the first boss 21. The exhaust end of the exhaust hole 23 is located on the conical side surface of the conical end 211, and the intake end of the exhaust hole 23 extends to the rubber sleeve 2 to communicate with the receiving groove 11. The gap between a portion of the conical side surface of the conical end 211 and the mounting hole is larger than the gap between the rubber sleeve 2 and the mounting hole, allowing for smoother air discharge from the exhaust hole 23 with its exhaust end located on the conical side surface. To further increase the smoothness of air discharge, the axis of the exhaust hole 23 extends in a straight line, such as... Figure 3 As shown, the extended line of the axis of the exhaust port 23 intersects the bottom of the receiving groove 11, facilitating the rapid discharge of air from the bottom of the receiving groove 11. The straight-line extension of the exhaust port 23 shortens the air discharge path.

[0045] The angle between the axis of the exhaust port 23 and the first annular sidewall 111 ranges from 20° to 30°. For example... Figure 3 As shown in the diagram, angle α is the angle between the axis of the exhaust port 23 and the first annular sidewall 111. When α is small, the exhaust port 23 is closer to the conical apex of the first boss 21, and the length of the exhaust port 23 is shorter, but the air inlet end of the exhaust port 23 is farther from the bottom of the receiving groove 11; when α is large, the exhaust port 23 is closer to the bottom of the first boss 21, and the length of the exhaust port 23 is longer, but the air inlet end of the exhaust port 23 is closer to the bottom of the receiving groove 11. The specific value of angle α can be set and selected according to the actual size of the rubber nail, and this embodiment does not impose specific limitations. The preferred value of angle α is 28°.

[0046] At least two exhaust holes 23 are provided, and the at least two exhaust holes 23 are arranged at intervals along the circumference of the rubber jacket 2, so that the exhaust is more uniform and the exhaust efficiency is higher.

[0047] In one embodiment, a second boss 22 is provided at the other end of the rubber sleeve 2 away from the first boss 21, and the second boss 22 extends radially outward from the rubber sleeve 2. When the rubber nail is installed in the mounting hole, the first boss 21 and the second boss 22 are located on opposite sides of the two connecting structures, preventing the rubber nail from falling out of the through mounting hole under external force from two directions, thus improving the connection reliability of the rubber nail. This is especially true when the first boss 21 and the second boss 22 abut against the outer sides of the two connecting structures (see reference). Figure 4 The first boss 21 and the second boss 22 can further constrain the two connecting structural members, ensuring that the two connecting structural members fit tightly together.

[0048] The present invention also provides a fan volute, which includes rubber studs as described in any of the above embodiments. The fan volute further includes a cover plate 100 and a volute body 200, with the rubber studs connecting the cover plate 100 and the volute body 200. Figure 4 As shown. When the rubber nail is pushed into the corresponding mounting holes of the cover plate 100 and the volute body 200, the first boss 21 is squeezed by external force, and the rubber sleeve 2 deforms. Therefore, at least part of the rubber sleeve 2 connected to the first boss 21 can be squeezed into the receiving groove 11, reducing the friction between the rubber nail and the cover plate 100 and the volute body 200, making it easier to push the rubber nail in, facilitating installation, and preventing damage to the rubber nail caused by forceful pushing. Furthermore, because the rubber sleeve 2 is elastic, it returns to its original shape after the rubber nail is installed. The large radial dimension of the first boss 21 can prevent the rubber nail from falling out of the mounting hole during prolonged use or under external pulling, increasing the connection reliability of the rubber nail. During the installation process, due to the flexibility of the rubber sleeve 2, the fan volute experiences less stress and does not require a threaded structure, which can avoid damage such as cracking and stripping of the fan volute, and improve the service life of the fan volute.

[0049] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0050] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. Rubber stud, characterized in that The support column (1) and the rubber jacket (2) are provided, the rubber jacket (2) is covered on the support column (1), one end of the rubber jacket (2) is provided with a first boss (21), the first boss (21) extends outwards along the radial direction of the rubber jacket (2), and the support column (1) is provided with a containing groove (11).

2. The rubber stud according to claim 1, characterized in that The containing groove (11) is arranged on the circumferential side of the support column (1), and the opening width of the containing groove (11) extends along the axial direction of the support column (1); in the same projection plane parallel to the axis of the support column (1), the first boss (21) and the containing groove (11) at least partially overlap.

3. The rubber stud according to claim 2, characterized in that Along the axial direction of the support column (1), the containing groove (11) has a first annular side wall (111) and a second annular side wall (112), the cross-sectional area of the first annular side wall (111) gradually increases from one end close to the second annular side wall (112) to one end away from the second annular side wall (112), and the cross-sectional area of the second annular side wall (112) gradually increases from one end close to the first annular side wall (111) to one end away from the first annular side wall (111).

4. The rubber stud according to claim 3, characterized in that The first annular side wall (111) and the second annular side wall (112) are both tapered surfaces, the taper of the first annular side wall (111) is smaller than the taper of the second annular side wall (112); and / or, The first annular side wall (111) and the second annular side wall (112) are connected.

5. The rubber stud according to claim 3, characterized in that The first annular side wall (111) extends to the top end of the support column (1) away from the second annular side wall (112).

6. The rubber stud according to claim 4, characterized in that The first boss (21) has a conical end (211), and the other end face of the first boss (21) away from the conical end (211) and the connection position of the first annular side wall (111) and the second annular side wall (112) are in the same plane.

7. The rubber stud according to claim 1, characterized in that The rubber jacket (2) is provided with a through exhaust hole (23), and the air inlet end of the exhaust hole (23) communicates with the containing groove (11).

8. The rubber stud according to claim 1, characterized in that The first boss (21) has a conical end (211), the first boss (21) has an exhaust hole (23), the exhaust end of the exhaust hole (23) is arranged on the conical side face of the conical end (211), and the air inlet end of the exhaust hole (23) extends to the rubber jacket (2) to communicate with the containing groove (11).

9. The rubber stud according to any one of claims 1-8, characterized in that, The other end of the rubber jacket (2) away from the first boss (21) is also provided with a second boss (22), and the second boss (22) extends outwards along the radial direction of the rubber jacket (2).

10. A fan volute, characterized by, The fan volute further comprises a cover plate (100) and a volute body (200), and the rubber pegs are connected to the cover plate (100) and the volute body (200).

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