Hollow composite material connecting rod connecting structure, connecting method and airplane

Abstract

The invention discloses a hollow composite material connecting rod connecting structure and method and an airplane. The connecting structure comprises a composite material connecting rod, metal connectors and connecting shaft sleeves, and the two ends of the composite material connecting rod are connected with the metal connectors 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 the 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] The present invention relates to the field of civil aircraft, and in particular to a hollow composite connecting rod connection structure, a connection method and an aircraft. Background Art

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

[0003] Composite connecting rods are usually slender two-force rods that bear tensile and compressive loads, and stability failure is an important failure mode. Considering the structural weight and load-bearing efficiency, the connecting rod should be designed as a hollow thin-walled rod. It is necessary to design a joint to connect with the hollow connecting rod, and then connect with other structures such as connecting angle pieces to complete the load transfer. Composite connecting rods and their joints have many structural connection relationships, which not only requires high static strength and stability of the connecting rod, but also puts forward requirements for the design and manufacturing feasibility of the connection structure between the connecting rod and the joint. Therefore, there are problems of complex processing and low efficiency.

[0004] Therefore, it is urgent to provide a solution for a hollow composite connecting rod connection structure. Summary of the invention

[0005] In order to solve the above problems, the technical solution of the present invention provides a hollow composite connecting rod connection structure, a connection method and an aircraft, which can solve the problems of complex processing and low efficiency.

[0006] According to a first aspect of the technical solution of the present invention, there is provided a hollow composite connecting rod connection structure, the connection structure comprising a composite connecting rod, a metal joint and a connecting sleeve, wherein both ends of the composite connecting rod are connected to the metal joint through the connecting sleeve;

[0007] The middle part of the composite connecting rod is a circular tubular structure, and the inner wall of the circular tubular structure is provided with a reinforcing strip, which is a cap-shaped reinforcing strip, and is axially arranged along the inner wall of the composite connecting rod. The cross section of the reinforcing strip is in a "∩" shape, the top is a plane or an arc surface, and both sides extend downward and are connected to the inner wall of the circular tubular structure;

[0008] Both ends of the composite connecting rod are truncated cone-shaped tubular structures, and both ends gradually expand outwards;

[0009] The inner wall of one end of the connecting sleeve is in contact with the outer surfaces of both ends of the composite connecting rod, and the other end is connected to the metal joint.

[0010] In the above scheme, the connecting sleeve is a half sleeve, a connecting component is provided on the connecting sleeve, and the two connecting sleeves are connected by the connecting component.

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

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

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

[0014] In the above solution, 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 scheme, the connecting component includes an ear piece arranged on the connecting sleeve, and the ear piece is provided with a screw hole, and the two connecting sleeves are fixed by the cooperation of a screw rod and a nut.

[0016] In the above scheme, the connection structure is applied to a wing central wing truss rib structure, an aircraft fairing connecting rod structure, an aircraft suspension diagonal brace structure or a rear fuselage pressure frame connecting rod structure.

[0017] According to a second aspect of the technical solution of the present invention, there is provided a method for connecting a hollow composite connecting rod connection structure as described above, comprising:

[0018] Connecting the two ends of the composite connecting rod to the connecting sleeves respectively, wherein the connecting sleeves wrap and fix the two ends of the composite connecting rod;

[0019] The metal joints are respectively connected to the connecting sleeves located at both ends of the composite connecting rod.

[0020] According to a third aspect of the technical solution of the present invention, there is provided an aircraft, wherein the aircraft is provided with the connection structure as described above.

[0021] Beneficial effects of the present invention:

[0022] The present invention discloses a hollow composite connecting rod connection structure, a connection method and an aircraft. A reinforcing strip is arranged in the middle of the composite connecting rod, thereby increasing the cross-sectional area of ​​the composite connecting rod and improving the overall stability of the rod. Both ends of the composite connecting rod are truncated cone-shaped tubular structures, and the two ends gradually expand outward, thereby increasing the area of ​​the connection surface, protecting the end of the composite connecting rod, and ensuring a stable connection with the joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 It is an overall schematic diagram of the hollow composite connecting rod connection structure of the present invention;

[0025] Figure 2 It is a schematic cross-sectional structure diagram of the connection position between the composite connecting rod and the metal joint in the hollow composite connecting rod connection structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the cross-sectional structure of the composite connecting rod in the hollow composite connecting rod connection structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the metal joint structure in the hollow composite connecting rod connection structure of the present invention;

[0028] Figure 5 It is a schematic diagram of the overall appearance of the composite connecting rod in the hollow composite connecting rod connection structure of the present invention;

[0029] Figure 6 It is a schematic diagram of a connecting sleeve in the hollow composite connecting rod connection structure of the present invention.

[0030] Among them, metal joint-1; composite connecting rod-2; connecting sleeve-3; screw-4; nut-5; reinforcement strip-6.

[0031] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0033] The terms "first", "second", etc. in the specification and claims of the present disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein, for example.

[0034] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0035] Multiple includes two or more.

[0036] It should be understood that the term "and / or" used in this disclosure is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone.

[0037] like Figure 1 to Figure 6 As shown, the first aspect of the embodiment of the technical solution 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 sleeve 3, and the two ends of the composite connecting rod 2 are connected to the metal joint 1 through the connecting sleeve 3.

[0038] The middle part of the composite connecting rod 2 is a circular tubular structure, and the inner wall of the circular tubular structure is provided with a reinforcing strip 6; the two ends of the composite connecting rod 2 are truncated cone-shaped tubular structures, and the two ends gradually expand outward; the inner wall of one end of the connecting sleeve 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.

[0039] The present invention increases the cross-sectional area of ​​the composite connecting rod 2 and improves the overall stability of the rod by arranging a reinforcing strip 6 in the middle of the composite connecting rod 2. The two ends of the composite connecting rod 2 are truncated cone-shaped tubular structures, and the two ends gradually expand outward, thereby increasing the area of ​​the connection surface, protecting the end of the composite connecting rod 2, and ensuring a stable connection with the joint.

[0040] In this embodiment, the connecting sleeve 3 is preferably a half sleeve with a semicircular cross section. A connecting component is provided on the connecting sleeve 3, and two connecting sleeves 3 are connected by the connecting component. Specifically, one end of the metal joint 1 connected to the composite connecting rod 2 has an internal thread structure, one end of the connecting sleeve 3 has a matching external thread structure, and the other end of the connecting sleeve 3 is provided with a connecting component, and the connecting component includes an ear piece arranged on the connecting sleeve 3, and a screw hole is provided on the ear piece. The two connecting sleeves 3 are fixed by the screw 4 and the nut 5. The middle part of the connecting sleeve 3 is truncated cone-shaped, and the inner wall fits with the end of the composite connecting rod 2. The metal joint 1 and the connecting sleeve 3 are connected by threads, and the structure is easy to disassemble and replace, and the structure is highly inspectable and the parts are interchangeable, and it has good maintainability.

[0041] In this embodiment, the reinforcing bar 6 is preferably a cap-shaped structure, which is axially arranged along the inner wall of the composite connecting rod 2. Therefore, the cross section of the reinforcing bar 6 is in the shape of "∩", with a flat or curved top, and both sides extending downward and connected to the inner wall of the circular tubular structure; further, in this embodiment, on the cross section of the composite connecting rod 2, the reinforcing bar 6 and the tube wall of the composite connecting rod 2 form a closed figure formed by three straight line segments and a circular arc. Specifically, 3 to 5 reinforcing bars 6 are provided. The space enclosed by the reinforcing bar 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 three reinforcing bars 6 are provided, the space enclosed by the reinforcing bar 6 and the inner wall of the composite connecting rod 2 accounts for 1 / 4 of the circumference of the inner wall cross-section of the circular tubular structure; when four reinforcing bars 6 are provided, the space enclosed by the reinforcing bar 6 and the inner wall of the composite connecting rod 2 accounts for 1 / 5 of the circumference of the inner wall cross-section of the circular tubular structure; when five reinforcing bars 6 are provided, the space enclosed by the reinforcing bar 6 and the inner wall of the composite connecting rod 2 accounts for 1 / 6 of the circumference of the inner wall cross-section of the circular tubular structure.

[0042] The composite connecting rod 2 is an integrally formed structure, and the composite connecting rod 2 is a carbon fiber epoxy resin material. During manufacturing, the composite hollow connecting rod needs to be designed with a hard core mold matching the cross-sectional shape, and is manufactured by hand layup / autoclave process.

[0043] The metal joint 1, the connecting sleeve 3, the screw 4 and the nut 5 are made of high-strength aluminum alloy. During manufacturing, the metal joint 1 and the connecting half sleeve can be machined with metal pipes or bars, and the screw 4 and the nut 5 can be customized in size or selected as standard parts according to the load conditions.

[0044] The connection structure is applied to the wing center wing truss rib structure, the aircraft fairing connecting rod structure, the aircraft suspension diagonal brace structure or the rear fuselage pressure frame connecting rod structure.

[0045] According to a second aspect of the technical solution of the present invention, there is provided a method for connecting a hollow composite connecting rod connection structure, comprising:

[0046] The two ends of the composite connecting rod 2 are respectively connected to the connecting sleeves 3, and the connecting sleeves 3 wrap and fix the two ends of the composite connecting rod 2;

[0047] The metal joint 1 is connected to the connecting sleeves 3 located at both ends of the composite connecting rod 2 respectively.

[0048] Specifically, two connecting sleeves 3 are buckled on the ends of the composite connecting rod 2, and the two connecting sleeves 3 are fixed by the ear pieces on the connecting sleeves 3 in cooperation with the screws 4 and the nuts 5, so that the connecting sleeves 3 wrap and fix the two ends of the composite connecting rod 2. Then, the metal joint 1 and the connecting sleeve 3 are connected by threaded cooperation to realize the connection between the metal joint 1 and the composite connecting rod 2.

[0049] According to a third aspect of the technical solution of the present invention, there is provided an aircraft, which is provided with the above-mentioned connection structure.

[0050] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0051] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0052] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0053] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A hollow composite connecting rod connection structure, characterized in that: The connection structure comprises a composite connecting rod, a metal joint and a connecting sleeve, and both ends of the composite connecting rod are connected to the metal joint through the connecting sleeve; The middle part of the composite connecting rod is a circular tubular structure, and the inner wall of the circular tubular structure is provided with a reinforcing strip, which is a cap-shaped reinforcing strip, and is axially arranged along the inner wall of the composite connecting rod. The cross section of the reinforcing strip is in a "∩" shape, the top is a plane or an arc surface, and both sides extend downward and are connected to the inner wall of the circular tubular structure; Both ends of the composite connecting rod are truncated cone-shaped tubular structures, and both ends gradually expand outwards; The inner wall of one end of the connecting sleeve is in contact with the outer surfaces of both ends of the composite connecting rod, and the other end is connected to the metal joint.

2. The hollow composite connecting rod connection structure according to claim 1, characterized in that: The connecting sleeve is a half sleeve, a connecting component is provided on the connecting sleeve, and two connecting sleeves are connected by the connecting component.

3. The hollow composite connecting rod connection structure according to claim 1, characterized in that: One end of the metal joint connected to the composite connecting rod has an internal thread structure, and the connecting sleeve 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 figure formed by three straight line segments and one circular arc.

5. The hollow composite connecting rod connection structure according to claim 1, characterized in that: The number of the reinforcing strips is 3 to 5.

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 comprises an ear piece arranged on the connecting shaft sleeve, and a screw hole is provided on the ear piece, and the two connecting shaft sleeves are fixed by the cooperation of a screw rod and a nut.

8. The connection structure according to any one of claims 1 to 7, characterized in that: The connection structure is applied to a wing central wing truss rib structure, an aircraft fairing connecting rod structure, an aircraft suspension diagonal brace rod structure or a rear fuselage pressure frame connecting rod structure.

9. A method for connecting a hollow composite connecting rod connection structure according to any one of claims 1 to 7, characterized in that: include: Connecting the two ends of the composite connecting rod to the connecting sleeves respectively, wherein the connecting sleeves wrap and fix the two ends of the composite connecting rod; The metal joints are respectively connected to the connecting sleeves located at both ends of the composite connecting rod.

10. An aircraft, characterized in that: The aircraft is provided with the connection structure according to claim 8.

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