Blind rivet and aircraft

Abstract

The self-plugging rivet comprises a core rod, a rivet sleeve, a locking piece and a driving piece, the core rod is formed through an aluminum oxide material, the core rod comprises a core head, a front rod section, a middle rod section and a rear rod section which are arranged in sequence, a shearing structure is arranged between the front rod section and the middle rod section, and the rear rod section is connected with the rivet sleeve. A neck breaking groove is formed between the middle rod section and the rear rod section; the core rod is sleeved with the nail sleeve, one end of the nail sleeve abuts against the shearing structure, and at least part of the nail sleeve and the rear rod section are arranged in a spaced mode to form a containing annular cavity; the locking piece is arranged on the rear rod section in a sleeving mode and arranged in the containing annular cavity, and the locking piece is connected with the rear rod section and the nail sleeve in an abutting mode. The driving piece is arranged on the rear rod section in a sleeving mode and abuts against the other end of the nail sleeve. The self-plugging rivet made of the aluminum oxide material has high shear strength, and the use requirements of the self-plugging rivet under the adjustment of high temperature, high shear force and complex alternating stress are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of fastener technology, and in particular to a blind rivet and an aircraft. Background Technology

[0002] In the aviation field, composite materials are extensively used in aircraft fuselages, wing skins, and other components. These parts are typically compact and enclosed, and conventional bolts and nuts, requiring double-sided installation, cannot meet the installation requirements of aircraft. Therefore, single-sided fasteners, such as blind rivets, are generally used to better meet the need for single-sided connections on aircraft. Blind rivets, also known as pop rivets, are a type of rivet used for single-sided riveting. When using blind rivets, the mandrel is pulled with a special installation tool to expand the rivet body, thus achieving the riveting effect. However, existing blind rivets generally use metallic materials for their mandrels and other components, such as titanium alloys and high-temperature alloys. The operating temperature of titanium alloys in current technology is generally below 500℃, and the operating temperature of high-temperature alloys is generally 600–700℃. These materials cannot meet the riveting requirements of components operating in high-temperature environments, especially in scenarios with ambient temperatures ≥1000℃. Therefore, improving the high-temperature resistance of blind rivets to enhance their applicability has become an urgent technical problem to be solved. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a blind rivet and an aircraft for improving high temperature resistance to enhance applicability.

[0004] The above-mentioned objective of this invention can be achieved by the following technical solution: This invention provides a blind rivet, comprising:

[0005] The core rod is formed of alumina material and includes a core head, a front section, a middle section and a rear section arranged in sequence. A shearing structure is provided between the front section and the middle section, and a necking groove is provided on the rear section.

[0006] A rivet sleeve is fitted onto the core rod, with one end of the rivet sleeve abutting against the shearing structure, and at least a portion of the rivet sleeve is spaced apart from the rear rod segment to form a receiving annular cavity;

[0007] A locking element is sleeved on the rear rod segment and placed in the receiving ring cavity, wherein the locking element abuts against and connects the rear rod segment and the nail sleeve;

[0008] A driving component, which is sleeved on the rear rod segment and abuts against the other end of the nail sleeve.

[0009] In a preferred embodiment of the present invention, the alumina material is alumina ceramic.

[0010] In a preferred embodiment of the present invention, the shearing structure includes a shearing ring disposed between the front rod segment and the middle rod segment, the shearing ring being integrally disposed with the core rod.

[0011] In a preferred embodiment of the present invention, a shearing groove is provided on the surface of the shearing ring on one side near the middle rod segment along the circumference of the core rod.

[0012] In a preferred embodiment of the present invention, the rear rod segment is provided with an anti-slip structure, the anti-slip structure including a plurality of anti-slip grooves disposed on the rear rod segment.

[0013] In a preferred embodiment of the present invention, the other end of the nail sleeve is provided with a flared portion.

[0014] In a preferred embodiment of the present invention, the locking member includes a locking ring arranged in an open loop, the locking ring being sleeved on the rear rod segment and abutting against the middle rod segment and / or the nail sleeve.

[0015] In a preferred embodiment of the present invention, the radial dimension of the middle rod segment is greater than that of the rear rod segment, and a limiting shoulder is provided at one end of the middle rod segment near the rear rod segment, and the locking ring abuts against the limiting shoulder.

[0016] In a preferred embodiment of the present invention, the driving member includes a driving pad, which is sleeved on the rear rod segment and abuts against the other end of the nail sleeve.

[0017] The present invention also provides an aircraft including the aforementioned blind rivet.

[0018] The technical solution of the present invention has the following significant beneficial effects:

[0019] Before use, the blind rivet of this invention has its sleeve fitted onto the mandrel. The mandrel has a shearing structure that abuts against one end of the sleeve, thus providing a limiting function. Furthermore, a receiving annular cavity is formed between the sleeve and the rear section of the mandrel. By fitting a locking member onto the rear section and placing it within the cavity, the locking member abuts against the rear section and the sleeve. The combination of the locking member and the shearing structure provides support and fixation, ensuring the sleeve and mandrel maintain their relative positions.

[0020] Furthermore, a driving component is fitted onto the rear section of the rod, abutting against the other end of the rivet sleeve. This driving component can be used with an installation tool to pull the mandrel for riveting. During riveting, the mandrel also features a shearing structure, which automatically disengages under shearing force, thus releasing the limiting effect. Additionally, the mandrel has a necking groove; as the mandrel is pulled, stress gradually concentrates at the necking groove, causing it to fracture and disconnect the rear section, thus improving the flatness of the installation area.

[0021] Furthermore, the use of alumina material to manufacture the core rod in this invention helps improve its heat resistance. Additionally, the blind rivet made of alumina material has high shear strength, ensuring its usability under high temperature, high shear force, and complex alternating stress conditions. Moreover, alumina material has the advantage of low manufacturing cost, facilitating its mass production for the blind rivet. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.

[0024] Figure 1 This is a side sectional view of one embodiment of the blind rivet described in this invention.

[0025] Figure 2 This is a side view of one embodiment of the core rod described in this invention.

[0026] Figure 3 This is a structural diagram illustrating the installation process of one embodiment of the blind rivet described in this invention.

[0027] Figure 4 This is a structural diagram of the installed core-pulling rivet according to one embodiment of the present invention.

[0028] The reference numerals in the above figures are as follows:

[0029] 10. Basic structure;

[0030] 20 mounting holes;

[0031] 100. Core rod; 110. Core head; 120. Front rod section; 130. Middle rod section; 131. Limiting shoulder; 140. Rear rod section; 141. Neck break groove; 150. Shear structure; 151. Shear ring; 152. Shear groove; 160. Anti-slip structure; 161. Anti-slip groove;

[0032] 200. Nail sleeve; 210. Flared end;

[0033] 300. Locking component; 310. Locking ring;

[0034] 400. Drive component; 410. Drive pad. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Implementation Method 1

[0037] Please refer to the following: Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a blind rivet, which includes a core rod 100, a rivet sleeve 200, a locking member 300 and a driving member 400. The core rod 100 is formed of alumina material and includes a core head 110, a front section 120, a middle section 130 and a rear section 140 arranged sequentially. A shearing structure 150 is provided between the front section 120 and the middle section 130, and a necking groove 141 is provided on the rear section 140. The sleeve 200 is fitted onto the core rod 100, with one end of the sleeve 200 abutting against the shear structure 150. At least a portion of the sleeve 200 and the rear rod segment 140 are spaced apart to form a receiving annular cavity. The locking member 300 is fitted onto the rear rod segment 140 and placed in the receiving annular cavity, with the locking member 300 abutting against the rear rod segment 140 and the sleeve 200. The driving member 400 is made of 45 steel or stainless steel, and is fitted onto the rear rod segment 140 and abutting against the other end of the sleeve 200.

[0038] Overall, before using the blind rivet, the rivet sleeve 200 is fitted onto the core rod 100. A shearing structure 150 is provided on the core rod 100, which abuts against one end of the rivet sleeve 200, thus providing a limiting function. Furthermore, a receiving annular cavity is formed between the rivet sleeve 200 and the rear section 140 of the core rod 100. By fitting the locking member 300 onto the rear section 140 and placing it within the receiving annular cavity, the locking member 300 abuts against and connects the rear section 140 and the rivet sleeve 200. Thus, the cooperation of the locking member 300 and the shearing structure 150 provides support and fixation, ensuring that the rivet sleeve 200 and the core rod 100 maintain their relative positions.

[0039] Furthermore, a drive member 400 is also fitted on the rear rod section 140. The drive member 400 abuts against the other end of the nail sleeve 200. The drive member 400 can be used in conjunction with the installation tool to pull the core rod 100 for riveting.

[0040] like Figure 3 and Figure 4 In the embodiment shown, during the riveting process, the shearing structure 150 on the core rod 100 automatically detaches under shearing force, thereby releasing the limiting effect. Furthermore, the core rod 100 is provided with a necking groove 141. During the pulling of the core rod 100, stress concentration gradually occurs at the necking groove 141, causing it to fracture and breaking off the rear section 140 protruding from the mounting hole 20, thus improving the flatness of the mounting area.

[0041] Furthermore, the use of alumina material to manufacture the core rod 100 in this invention helps improve the heat resistance of the core rod 100. Additionally, the blind rivet made of alumina material has high shear strength, ensuring its usability under high temperature, high shear force, and complex alternating stress conditions. Moreover, alumina material has the advantage of low manufacturing cost, facilitating its mass production for blind rivets.

[0042] Furthermore, by placing the locking element 300 between the core rod 100 and the rivet sleeve 200, the installation accuracy is improved, making it less likely for the blind rivet to experience axial force deviation during installation, thus avoiding the problem of excessive eccentricity and better meeting the design objectives after installation.

[0043] In embodiments of the present invention, the nail sleeve 200 is made of stainless steel or a high-temperature alloy, enabling it to be used in high-temperature environments. Of course, designers can adjust the specific material of the locking element 300 according to usage requirements, and no specific limitations are imposed here.

[0044] In embodiments of the present invention, the locking element 300 is made of GH2132 or other high-temperature alloys, enabling it to be used in high-temperature environments. Of course, designers can adjust the specific material of the locking element 300 according to usage requirements, and no specific limitations are imposed here.

[0045] In the embodiments of the present invention, the designer may adjust the specific structure of the base structure 10 according to the needs of use. For example, the base structure 10 may be a board or a wall, etc., and no specific limitation is made here.

[0046] In embodiments of the present invention, such as Figure 1 In the embodiment shown, the core head 110 includes a protrusion at one end of the front rod section 120.

[0047] The protrusion compresses the nail sleeve 200 to form the pier head, which provides axial positioning with the mounting hole 20 of the foundation structure 10. Designers can adjust the specific structure of the core head 110 according to usage requirements; no specific limitations are specified here.

[0048] In embodiments of the present invention, the alumina material is alumina ceramic. Alumina ceramic is a ceramic material mainly composed of Al2O3, and it has good electrical conductivity, mechanical properties, and high-temperature resistance.

[0049] Among them, the Al2O3 content in the high-purity alumina ceramic is above 99.9%, its sintering temperature is between 1650℃ and 1990℃, and its high-temperature zone operating temperature can reach above 1000℃, which enables the core-pulling rivet to meet the needs of use in high-temperature environments.

[0050] Of course, in other feasible embodiments, the designer may adjust the specific molding material of the core rod 100 according to the needs of use, such as metal materials, non-metal materials or composite materials with similar properties to alumina ceramics, etc., without making specific limitations here.

[0051] In embodiments of the present invention, such as Figure 2 In the embodiment shown, the shear structure 150 includes a shear ring 151 disposed between the front rod segment 120 and the middle rod segment 130, and the shear ring 151 is integrally disposed with the core rod 100.

[0052] By making the shearing ring 151 and the core rod 100 integrally set, the structural stability between the shearing ring 151 and the core rod 100 is improved, and the processing efficiency of the shearing ring 151 is also improved.

[0053] Specifically, along the circumference of the core rod 100, a shearing groove 152 is provided on the surface of the shearing ring 151 near the middle rod segment 130.

[0054] By providing a shear groove 152 on the shear ring 151, the shear groove 152 can form a structurally weak area. During the pulling of the core rod 100, the shear ring 151 abuts against the nail sleeve 200 and receives shear force, causing stress concentration to gradually occur at the shear groove 152, leading to fracture. The fractured shear ring 151 can then be placed in the pier head. Furthermore, the shear ring 151 can compress and deform the nail sleeve 200, providing a certain degree of locking effect.

[0055] In embodiments of the present invention, such as Figure 2 In the illustrated embodiment, the rear rod segment 140 is provided with an anti-slip structure 160, which includes a plurality of anti-slip grooves 161 disposed on the rear rod segment 140. By providing the anti-slip structure 160 on the rear rod segment 140, it is beneficial to clamp the rear rod segment 140 more stably during installation, thereby improving the riveting effect.

[0056] Specifically, a portion of the rear rod segment 140 extends to the outside of the nail sleeve 200, and an anti-slip structure 160 is provided on this portion of the rear rod segment 140.

[0057] Of course, in other feasible embodiments, designers may adjust the specific construction of the anti-slip structure 160 according to the needs of use, and no specific restrictions are imposed here.

[0058] In embodiments of the present invention, such as Figure 3 and Figure 4 In the embodiment shown, the other end of the nail sleeve 200 is provided with a flared portion 210. Furthermore, one end of the nail sleeve 200 needs to extend beyond the outside of the mounting hole 20 of the foundation structure 10 during installation, so that the protruding portion of the nail sleeve 200 can form a pier head.

[0059] Designers can adjust the specific structure of the flared portion 210 according to usage needs, and no specific restrictions are imposed here. Preferably, the end of the flared portion 210 furthest from the core head 110 is gradually increased in size.

[0060] Before riveting, the pop rivet is inserted into the mounting hole 20 on the base structure 10. The flared part 210 can play an axial limiting role with the mounting hole 20 of the base structure 10.

[0061] The end of the mounting hole 20 that mates with the flared portion 210 can be set in a conformal shape with the flared portion 210, so that the flared portion 210 can be completely embedded in the mounting hole 20, which helps to improve the surface flatness of the base structure 10.

[0062] Furthermore, after riveting, the core rod 100 compresses the nail sleeve 200 to form the head, and the head and the flared part 210 are respectively placed at both ends of the mounting hole 20 to cooperate and play an axial limiting role, thereby realizing the riveting limit.

[0063] In embodiments of the present invention, such as Figure 1 In the embodiment shown, the locking member 300 includes a locking ring 310 arranged in an open loop, which is sleeved on the rear rod segment 140 and abuts against the middle rod segment 130 and / or the nail sleeve 200.

[0064] By using the locking ring 310 to abut against the connecting core rod 100 and the nail sleeve 200, the core rod 100 and the nail sleeve 200 are less likely to separate after installation, thus improving the structural stability of the blind rivet.

[0065] Furthermore, the locking ring 310 can also provide a certain degree of support, so that the core rod 100 and the rivet sleeve 200 can be arranged approximately on the same axis. This makes it less likely for the blind rivet to be axially offset during installation, thus avoiding the problem of excessive eccentricity, improving installation accuracy, and better meeting the design objectives after installation.

[0066] After installation, the locking ring 310 can be compressed and filled in the gap between the rear rod section 140 and the nail sleeve 200, thereby providing a certain locking effect. Furthermore, after the locking ring 310 is compressed, one end of the core rod 100 is approximately parallel to one end of the mounting hole 20, which helps to improve the surface flatness of the base structure 10.

[0067] In embodiments of the present invention, such as Figure 1 and Figure 2 In the embodiment shown, the radial dimension of the middle section 130 is larger than that of the rear section 140. A limiting shoulder 131 is provided at one end of the middle section 130 near the rear section 140, and the locking ring 310 abuts against the limiting shoulder 131.

[0068] By making the radial dimension of the middle section 130 larger than that of the rear section 140, the end of the middle section 130 near the rear section 140 protrudes directly to form the limiting shoulder 131, eliminating the need for additional components or structures and improving manufacturing efficiency. Furthermore, the limiting shoulder 131 effectively limits the locking ring 310, improving its installation accuracy and preventing it from shifting.

[0069] Of course, in other feasible embodiments, designers may adjust the specific structure of the limiting shoulder 131 according to the needs of use, and no specific restrictions are imposed here.

[0070] In an embodiment of the present invention, the driving member 400 includes a driving washer 410, which is sleeved on the rear rod segment 140 and abuts against the other end of the nail sleeve 200. Designers can adjust the specific structure of the driving washer 410 according to usage requirements, and no specific limitations are imposed here.

[0071] In one feasible embodiment, the drive shim 410 has a hollowed-out area in the middle. During the riveting process, the drive shim 410 can cooperate with the installation tool to cause relative displacement between the nail sleeve 200 and the core rod 100, so that part of the nail sleeve 200 can be compressed by the core rod 100 to form the pier head.

[0072] Implementation Method 2

[0073] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an embodiment of the present invention provides an aircraft that includes the core-pulling rivet described in Embodiment 1.

[0074] The specific structure, working principle, and beneficial effects of this blind rivet are the same as those described in Embodiment 1, and will not be repeated here. By using blind rivets, this aircraft can improve its high-temperature resistance and structural stability, and reduce the assembly difficulty and cost.

[0075] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified element, component, part, or step, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute “may” include is optional. Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The disclosure of “a” or “an” used to describe an element, component, part, or step does not imply exclusion of other elements, components, parts, or steps.

[0076] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A blind rivet, characterized in that, include: The core rod is formed of alumina material and includes a core head, a front section, a middle section and a rear section arranged in sequence. A shearing structure is provided between the front section and the middle section, and a necking groove is provided on the rear section. A rivet sleeve is fitted onto the core rod, with one end of the rivet sleeve abutting against the shearing structure, and at least a portion of the rivet sleeve is spaced apart from the rear rod segment to form a receiving annular cavity; A locking element is sleeved on the rear rod segment and placed in the receiving ring cavity, wherein the locking element abuts against and connects the rear rod segment and the nail sleeve; A driving component, which is sleeved on the rear rod segment and abuts against the other end of the nail sleeve.

2. The blind rivet as described in claim 1, characterized in that, The alumina material is alumina ceramic.

3. The blind rivet as described in claim 1, characterized in that, The shearing structure includes a shearing ring disposed between the front rod segment and the middle rod segment, and the shearing ring is integrally disposed with the core rod.

4. The blind rivet as described in claim 3, characterized in that, Along the circumference of the core rod, the shearing ring has a shearing groove on the side surface near the middle rod segment.

5. The blind rivet as described in claim 1, characterized in that, The rear section of the rod is provided with an anti-slip structure, which includes multiple anti-slip grooves on the rear section of the rod.

6. The blind rivet as described in claim 1, characterized in that, The other end of the nail sleeve is provided with a flared section.

7. The blind rivet as described in claim 1, characterized in that, The locking element includes a locking ring arranged in an open loop, which is sleeved on the rear rod segment and abuts against the middle rod segment and / or the nail sleeve.

8. The blind rivet as described in claim 7, characterized in that, The radial dimension of the middle rod segment is greater than that of the rear rod segment. The middle rod segment is provided with a limiting shoulder at one end near the rear rod segment, and the locking ring abuts against the limiting shoulder.

9. The blind rivet as described in claim 1, characterized in that, The driving component includes a driving pad, which is sleeved on the rear rod segment and abuts against the other end of the nail sleeve.

10. An aircraft, characterized in that, Includes the pop rivet as described in any one of claims 1 to 9.

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