Hollow composite material connecting rod connecting structure and airplane

Abstract

The utility model discloses a hollow composite material connecting rod connecting structure and an airplane, the connecting structure comprises a composite material connecting rod, metal joints and connecting shaft sleeves, and the two ends of the composite material connecting rod are connected with the metal joints through the connecting shaft sleeves; the middle of the composite connecting rod is of a circular-tube-shaped structure, the inner wall of the circular-tube-shaped structure is provided with a stiffened strip, the stiffened strip is a cap-shaped stiffened strip and is arranged in the axial direction of the inner wall of the composite connecting rod, the cross section of the stiffened strip is in an n shape, the top of the stiffened strip is a plane or a cambered surface, and the two sides of the stiffened strip extend downwards and are connected with the inner wall of the circular-tube-shaped structure. The two ends of the composite connecting rod are each of a circular-truncated-cone-shaped tubular structure, and the two ends gradually expand outwards. The inner wall of one end of the connecting shaft sleeve is attached to the outer surfaces of the two ends of the composite connecting rod, and the other end is connected with the metal connector. The reinforcing ribs are arranged in the middle of the composite material connecting rod, the sectional area of the composite material connecting rod is increased, the overall stability of a rod piece is improved, the two ends of the composite material connecting rod are each of a circular-truncated-cone-shaped tubular structure, the two ends gradually expand outwards, the area of a connecting face is increased, the ends of the composite material connecting rod are protected, and stable connection with a connector is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of civil aircraft, and in particular to a hollow composite material connecting rod structure and an aircraft. Background Technology

[0002] In the field of civil aircraft, linkage structures are widely used in structures such as the central wing truss rib structure, aircraft fairing linkage structure, aircraft suspension diagonal brace structure, or rear fuselage pressure frame linkage. In order to pursue structural efficiency and weight reduction, the linkages are made of carbon fiber composite materials. On the other hand, considering manufacturing efficiency and manufacturability, the joints that are connected to composite materials are generally made of metal structures.

[0003] Composite material connecting rods are typically slender two-force members subjected to tensile and compressive loads, and stability failure is a significant failure mode. Considering structural weight and load-bearing efficiency, connecting rods should be designed as hollow, thin-walled rods. Joints are required to connect to the hollow connecting rod before connecting it to other structures, such as connecting plates, to complete load transfer. The complex connection relationships between composite material connecting rods and their joints not only place high demands on the static strength and stability of the connecting rods but also on the design and manufacturing feasibility of the connection structures between the connecting rods and joints. Therefore, this results in complex processing and low efficiency.

[0004] Therefore, there is an urgent need to provide a solution for a hollow composite rod connection structure. Utility Model Content

[0005] To address the above problems, this utility model provides a hollow composite connecting rod structure and an aircraft, which can solve the problems of complex processing and low efficiency.

[0006] According to a first aspect of the present invention, a hollow composite connecting rod connection structure is provided. The connection structure includes a composite connecting rod, a metal joint, and a connecting bushing. The two ends of the composite connecting rod are connected to the metal joint through the connecting bushing.

[0007] The middle part of the composite connecting rod is a cylindrical structure. The inner wall of the cylindrical structure is provided with a stiffening strip. The stiffening strip is a cap-shaped stiffening strip, which is arranged axially along the inner wall of the composite connecting rod. The cross-section of the stiffening strip is "∩" shaped, with a flat or arc-shaped top and both sides extending downward and connecting to the inner wall of the cylindrical structure.

[0008] The composite connecting rod has frustum-shaped tubular structures at both ends, and the two ends gradually expand outward.

[0009] One end of the connecting bushing is fitted with the outer surfaces of both ends of the composite connecting rod, and the other end is connected to the metal connector.

[0010] In the above scheme, the connecting bushing is a half bushing, and the connecting bushing is provided with a connecting component, and the two connecting bushings are connected through the connecting component.

[0011] In the above scheme, the end of the metal joint connected to the composite connecting rod has an internal thread structure, and the connecting bushing has a matching external thread structure.

[0012] In the above scheme, the cross-section of the composite connecting rod includes a closed shape formed by three straight line segments and a circular arc.

[0013] In the above scheme, there are 3 to 5 reinforcing strips.

[0014] In the above scheme, the space enclosed by the reinforcing strip and the inner wall of the composite connecting rod occupies 1 / 6 to 1 / 4 of the circumference of the inner wall cross section of the circular tubular structure.

[0015] In the above solution, the connecting component includes a lug provided on the connecting bushing, and the lug is provided with a screw hole, and the two connecting bushings are fixed by the cooperation of a screw and a nut.

[0016] In the above scheme, the composite connecting rod is an integrally molded structure, and the composite connecting rod is made of carbon fiber epoxy resin material.

[0017] According to a second aspect of the present invention, an aircraft is provided, the aircraft being provided with the connection structure described above.

[0018] The beneficial effects of this utility model are:

[0019] This utility model discloses a hollow composite connecting rod connection structure and an aircraft. By setting a reinforcing strip in the middle of the composite connecting rod, the cross-sectional area of ​​the composite connecting rod is increased, which improves the overall stability of the rod. The two ends of the composite connecting rod are frustum-shaped tubular structures, and the two ends gradually expand outward, which increases the area of ​​the connection surface, protects the ends of the composite connecting rod, and ensures a stable connection with the joint. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is an overall schematic diagram of the hollow composite connecting rod connection structure of this utility model;

[0022] Figure 2 This is a schematic cross-sectional view of the connection position between the composite connecting rod and the metal joint in the hollow composite connecting rod connection structure of this utility model.

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the composite connecting rod in the hollow composite connecting rod connection structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the metal joint structure in the hollow composite connecting rod connection structure of this utility model;

[0025] Figure 5 This is a schematic diagram of the overall appearance of the composite connecting rod in the hollow composite connecting rod connection structure of this utility model;

[0026] Figure 6 This is a schematic diagram of the connecting bushing in the hollow composite connecting rod connection structure of this utility model.

[0027] Among them, metal joint-1; composite connecting rod-2; connecting bushing-3; screw-4; nut-5; reinforcing strip-6.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0030] The terms "first," "second," etc., used in this disclosure are for distinguishing similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0031] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0032] Multiple, including two or more.

[0033] And / or, it should be understood that, for the purposes of this disclosure, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone.

[0034] like Figures 1-6 As shown, one embodiment of the present invention provides a hollow composite connecting rod connection structure. The connection structure includes a composite connecting rod 2, a metal joint 1, and a connecting bushing 3. The two ends of the composite connecting rod 2 are connected to the metal joint 1 through the connecting bushing 3.

[0035] The middle part of the composite connecting rod 2 is a circular tube structure, and the inner wall of the circular tube structure is provided with reinforcing strips 6; the two ends of the composite connecting rod 2 are frustum-shaped tubular structures, and the two ends gradually expand outward; the inner wall of one end of the connecting bushing 3 is in contact with the outer surface of the two ends of the composite connecting rod 2, and the other end is connected to the metal joint 1.

[0036] This utility model increases the cross-sectional area of ​​the composite connecting rod 2 by setting a reinforcing strip 6 in the middle of the composite connecting rod 2, thereby improving the overall stability of the rod. The two ends of the composite connecting rod 2 are frustum-shaped tubular structures, and the two ends gradually expand outward, increasing the area of ​​the connecting surface, protecting the ends of the composite connecting rod 2, and ensuring a stable connection with the joint.

[0037] In this preferred embodiment, the connecting sleeve 3 is a semi-circular sleeve with a semi-annular cross-section. The connecting sleeve 3 has a connecting component, and the two connecting sleeves 3 are connected through this component. Specifically, the end of the metal connector 1 that connects to the composite connecting rod 2 has an internal thread structure, and the end of the connecting sleeve 3 has a matching external thread structure. The other end of the connecting sleeve 3 has a connecting component, which includes a lug on the connecting sleeve 3 with a threaded hole. The two connecting sleeves 3 are fixed together by a screw 4 and a nut 5. The middle part of the connecting sleeve 3 is frustoconical, and its inner wall fits against the end of the composite connecting rod 2. The metal connector 1 and the connecting sleeve 3 are connected by threads, making disassembly and replacement convenient, with strong structural inspectability and parts interchangeability, and good maintainability.

[0038] In this preferred embodiment, the stiffener 6 has a cap-shaped structure and is axially arranged along the inner wall of the composite connecting rod 2. Therefore, the cross-section of the stiffener 6 is "∩"-shaped, with a flat or curved top and both sides extending downwards and connecting to the inner wall of the circular tubular structure. Further, in this embodiment, on the cross-section of the composite connecting rod 2, the stiffener 6 and the tube wall of the composite connecting rod 2 form a closed shape consisting of three straight segments and an arc. Specifically, there are 3 to 5 stiffeners 6. The space enclosed by the stiffener 6 and the inner wall of the composite connecting rod 2 occupies 1 / 6 to 1 / 4 of the circumference of the inner wall cross-section of the circular tubular structure. Furthermore, when there are 3 stiffeners 6, the space enclosed by the stiffeners 6 and the inner wall of the composite connecting rod 2 occupies 1 / 4 of the circumference of the inner wall section of the circular tubular structure; when there are 4 stiffeners 6, the space enclosed by the stiffeners 6 and the inner wall of the composite connecting rod 2 occupies 1 / 5 of the circumference of the inner wall section of the circular tubular structure; when there are 5 stiffeners 6, the space enclosed by the stiffeners 6 and the inner wall of the composite connecting rod 2 occupies 1 / 6 of the circumference of the inner wall section of the circular tubular structure.

[0039] Composite connecting rod 2 is a one-piece molded structure made of carbon fiber epoxy resin. During manufacturing, a rigid mandrel with a matching cross-sectional shape needs to be designed for the composite hollow connecting rod, which is then manufactured using a hand-laying / autoclave process.

[0040] Metal connector 1, connecting bushing 3, screw 4 and nut 5 are made of high-strength aluminum alloy. During manufacturing, metal connector 1 and connecting bushing can be machined from metal pipes or bars, and screw 4 and nut 5 can be customized in size or selected from standard parts according to the load conditions.

[0041] The connecting structure is applied to the central wing truss rib structure, aircraft fairing linkage structure, aircraft suspension diagonal brace structure, or rear fuselage pressure frame linkage structure.

[0042] In this embodiment, the connection method of the hollow composite rod connection structure is as follows:

[0043] Two connecting bushings 3 are fastened to the ends of the composite connecting rod 2. The two connecting bushings 3 are fixed by the lugs on the connecting bushings 3 and the screws 4 and nuts 5, so that the connecting bushings 3 wrap around and fix the two ends of the composite connecting rod 2. Then, the metal connector 1 and the connecting bushings 3 are connected by threaded connection to realize the connection between the metal connector 1 and the composite connecting rod 2.

[0044] According to a second aspect of the present invention, an aircraft is provided, the aircraft being provided with the connection structure described above.

[0045] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0046] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0047] Through the above description of the embodiments, those skilled in the art can clearly understand that the above implementation methods can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this utility model, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this utility model.

[0048] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A hollow composite connecting rod structure, characterized in that, The connection structure includes a composite connecting rod, a metal joint, and a connecting bushing. The two ends of the composite connecting rod are connected to the metal joint through the connecting bushing. The middle part of the composite connecting rod is a cylindrical structure. The inner wall of the cylindrical structure is provided with a stiffening strip. The stiffening strip is a cap-shaped stiffening strip, which is arranged axially along the inner wall of the composite connecting rod. The cross-section of the stiffening strip is "∩" shaped, with a flat or arc-shaped top and both sides extending downward and connecting to the inner wall of the cylindrical structure. The composite connecting rod has frustum-shaped tubular structures at both ends, and the two ends gradually expand outward. One end of the connecting bushing has its inner wall in contact with the outer surfaces of both ends of the composite connecting rod, and the other end is connected to the metal connector.

2. The hollow composite connecting rod connection structure according to claim 1, characterized in that, The connecting bushing is a half bushing, and a connecting component is provided on the connecting bushing. Two connecting bushings are connected through the connecting component.

3. The hollow composite connecting rod connection structure according to claim 1, characterized in that, The metal joint has an internal thread structure at one end connected to the composite connecting rod, and the connecting bushing has a matching external thread structure.

4. The hollow composite connecting rod connection structure according to claim 1, characterized in that, The cross-section of the composite connecting rod comprises a closed shape formed by three straight line segments and a circular arc.

5. The hollow composite connecting rod connection structure according to claim 1, characterized in that, The reinforcing strips are provided in 3 to 5 parts.

6. The hollow composite connecting rod connection structure according to claim 5, characterized in that, The space enclosed by the reinforcing strip and the inner wall of the composite connecting rod occupies 1 / 6 to 1 / 4 of the circumference of the inner wall cross section of the circular tubular structure.

7. The hollow composite connecting rod connection structure according to claim 2, characterized in that, The connecting component includes a lug provided on the connecting bushing, and the lug is provided with a screw hole, and the two connecting bushings are fixed by the cooperation of a screw and a nut.

8. The hollow composite connecting rod connection structure according to claim 1, characterized in that, The composite connecting rod is a one-piece molded structure, and the composite connecting rod is made of carbon fiber epoxy resin material.

9. An aircraft, characterized in that, The aircraft is provided with a connection structure as described in any one of claims 1-8.

Images