Connector structure

Abstract

The invention belongs to the technical field of part manufacturing, and discloses a joint structure. The device comprises a main body and a cover plate, the cover plate covers the main body, the main body comprises a deep pit part and a double-beam part, the deep pit part is installed on one side of the double-beam part, the side, away from the deep pit part, of the double-beam part extends to form two sets of inner lug parts, the inner lug parts and an upper wing plate and a lower wing plate of the double-beam part define inserting grooves, and outer lug parts are inserted into the inserting grooves. Fibers in the inner ear part extend to the deep pit part and the double-beam part; the problem that in the prior art, local quality defects can occur when a connector is prepared from a composite material is solved.

Description

Technical Field

[0001] This invention relates to the field of parts manufacturing technology, and in particular to a joint structure. Background Technology

[0002] In the field of aerospace technology, the performance of structural connectors is directly related to the safety and reliability of the entire aircraft. As a key structural connection component, the main function of the joint is to effectively connect structural components in different locations and realize the transfer and distribution of loads. Since the aircraft needs to withstand complex mechanical environment and variable thermal loads during operation, the design, material selection and manufacturing process of the joint become the core factors that determine the overall structural performance.

[0003] For joints with complex structures, metal materials are traditionally used for fabrication. However, metal materials have some inherent limitations in practical applications. Metals have a large coefficient of thermal expansion, which can easily cause the connection structure between the joint and its accessories to loosen, deform or even crack in the aerospace environment with drastic temperature changes. In severe cases, this may lead to structural failure. In addition, metal materials have a high density, which is not conducive to the lightweight design of aircraft. This conflicts with the urgent need for weight reduction in the aerospace field.

[0004] To overcome the shortcomings of metallic materials, composite materials have gradually become the ideal choice for joint preparation due to their advantages such as high specific strength, large specific modulus, fatigue resistance, and strong designability. The preparation of composite materials for complex structural joints often adopts layer-by-layer stacking molding technology. However, this method has obvious limitations in practical applications. Because it is difficult to achieve multi-directional branching of fiber materials during the molding process, especially in joint areas with deep cavities, multi-directional bends, and fork-shaped features, the uniformity and continuity of fiber laying are often difficult to guarantee. At the same time, the resin matrix has poor fluidity in the bending and fork-shaped areas, which can easily lead to poor local wetting, resulting in quality defects such as pores and dry spots. These defects not only reduce the mechanical properties of the joint, but may also become stress concentration points, causing early failure during service. Summary of the Invention

[0005] The purpose of this invention is to provide a joint structure that solves the problem of local quality defects that occur when using composite materials to prepare joints in the prior art.

[0006] To achieve this objective, the present invention adopts the following technical solution: The present invention provides a connector structure, including a main body and a cover plate, the cover plate covering the main body, the main body including a deep pit and a double beam, the deep pit being installed on one side of the double beam, the double beam extending away from the deep pit forming two sets of inner ears, the inner ears and the upper and lower wing plates of the double beam forming an insertion groove, the outer ears being inserted into the insertion groove, and the fibers inside the inner ears extending toward the deep pit and the double beam.

[0007] Preferably, the deep pit is rectangular, and a first side beam and a second side beam are provided on both sides of the edge of the deep pit. The first side beam and the second side beam are parallel to the length direction of the double beam. A first fiber is laid inside the inner ear. The two ends of the first fiber are respectively laid in the two sets of the inner ear. The middle part of the first fiber extends into the first side beam and the second side beam.

[0008] Preferably, the first side beam is disposed on one side near the double beam portion, the second fiber is laid inside the first side beam, and the two ends of the second fiber are laid inside the inner ear portion on both sides.

[0009] Preferably, a third fiber is laid in the deep pit, with both ends of the third fiber extending into the inner ear.

[0010] Preferably, the inner ear portion is further provided with a fourth fiber, which extends to the end of the double-beam portion.

[0011] Preferably, the deep pit is provided with a third side beam and a fourth side beam, the third side beam and the fourth side beam are parallel to each other, a fifth fiber is laid in the third side beam and the fifth fiber extends into the inner ear, and a sixth fiber is laid in the fourth side beam and the sixth fiber extends into the inner ear.

[0012] Preferably, the cover plate is lined with a seventh fiber.

[0013] Preferably, the inner ear portion is formed by the front ends of the third side beam and the fourth side beam, a first bottom plate is provided on the lower side of the deep pit portion, a first gap is formed between the first bottom plate and the third side beam and the fourth side beam, a lower wing plate is provided on the plug plate, the lower wing plate is plugged into the first gap, the double beam portion includes an upper wing plate and a lower wing plate, the upper wing plate and the lower wing plate are parallel to each other, and the upper wing plate is provided on the side close to the cover plate.

[0014] Preferably, the inner ear portion is formed by extending the front ends of the third side beam and the fourth side beam, and a second bottom plate is provided on the lower side of the deep pit portion. A second gap is formed between the second bottom plate and the third side beam and the fourth side beam. The ear plate portion is inserted into the second gap, and an inner ear plate is formed on the ear plate portion. The inner ear plate fits against the inner ear portion.

[0015] Preferably, the deep pit includes a third base plate, a third gap is formed on the inner ear member, the third base plate is inserted into the third gap, the inner ear member extends to form the inner ear portion, and the inner ear member is also provided with the end of the double beam portion.

[0016] Beneficial effects: During the laying process, the fibers in the inner ear extend to the deep pit and double beam, which enables the stress on the inner and outer ear to be transmitted and dispersed in the joint structure. By transmitting stress through the fibers, the strength of the joint structure is increased. At the same time, dividing the joint structure into the main body, cover plate, outer ear and double beam, processing them separately and then merging them can reduce the difficulty of fiber laying and make the forming quality of the joint structure higher. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the splicing process of the joint structure of the present invention; Figure 2 This is a top cross-sectional view of the present invention; Figure 3 This is a side cross-sectional view of the present invention; Figure 4 This is a front cross-sectional view of the present invention; Figure 5 This is a schematic diagram of the plug-in board of the present invention; Figure 6 This is a schematic diagram of the ear plate insertion part of the present invention; Figure 7 This is a schematic diagram of the inner ear component insertion of the present invention.

[0018] In the diagram: 1. First fiber; 2. Second fiber; 3. Third fiber; 4. Fourth fiber; 5. Fifth fiber; 6. Sixth fiber; 7. Seventh fiber; 8. Main body; 81. Deep pit section; 811. First side beam; 812. Second side beam; 813. Third side beam; 814. Fourth side beam; 82. Double beam section; 821. Upper wing plate; 822. Lower wing plate; 83. Inner ear section; 84. Insertion groove; 85. Outer ear section; 9. Cover plate; 10. First bottom plate; 101. First gap; 20. Insertion plate; 30. Second bottom plate; 301. Second gap; 40. Ear plate section; 401. Inner ear plate; 50. Third bottom plate; 60. Inner ear piece; 601. Third gap. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0020] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0023] In the field of aerospace technology, joints are needed to connect structural components in different locations. Joints enable the connection between different components and the transfer and distribution of loads. As a key part of connecting structural components, the performance of joints directly affects the safety and reliability of the overall structure. For joints with complex structures, if metal materials are used for fabrication, the large coefficient of thermal expansion of metal materials can easily lead to loosening, cracking, or even failure of the joint's connection structure. When fabricating joints with complex structures using composite materials, a layer-by-layer stacking technique is usually used. However, this technique has certain limitations. Because fiber materials cannot branch in multiple directions, and resin has poor flowability in bending and forked areas, uneven fiber laying and poor resin wetting can occur in joints with deep cavities, multi-directional bends, and forked features, resulting in quality defects in the joint.

[0024] To solve the above problems, such as Figures 1 to 7As shown, the present invention provides a connector structure, including a main body 8 and a cover plate 9. The cover plate 9 covers the main body 8. The main body 8 includes a deep pit 81 and a double beam 82. The deep pit 81 is installed on one side of the double beam 82. The double beam 82 extends away from the deep pit 81 to form two sets of inner ears 83. The inner ears 83 and the upper and lower wing plates 822 of the double beam 82 form an insertion groove 84. The outer ears 85 are inserted into the insertion groove 84. The fibers inside the inner ears 83 extend towards the deep pit 81 and the double beam 82. Since the stress at the position of the outer ears 85 is low, the outer ears 85 can be processed separately and finally spliced ​​together.

[0025] By redesigning the joint structure and manufacturing it separately, the joint structure is configured as a deep pit 81, a double beam 82, an inner ear 83, an outer ear 85, and a cover plate 9. Using mechanical design software, it can be determined that the joint structure of the present invention has high stress in the inner ear 83 and the double beam 82 in between, as well as the deep pit 81. This requires ensuring the continuity of fibers in the above-mentioned locations so that the stress can be dispersed and transferred to other locations during the stress process, thereby avoiding excessive local stress in the joint structure and improving the strength of the joint structure under complex structures. At the same time, since fiber laying has limitations, the joint structure is modularized in areas where stress is not concentrated, which can avoid the limitations of fiber laying and reduce the number of locations with features such as deep cavity, multi-directional bending, and fork. By splitting the joint structure, the occurrence of the above-mentioned locations is reduced, thereby making the fiber laying more uniform and the resin impregnation effect better.

[0026] To enhance the strength of the joint structure, this invention utilizes multiple sets of fibers to reinforce the inner ear portion 83 and the surrounding structure. The deep pit portion 81 is rectangular, with a rectangular deep pit on the lower side. A first side beam 811 and a second side beam 812 are provided on both sides of the edge of the deep pit portion 81. The first side beam 811 and the second side beam 812 are parallel to the length direction of the double beam portion 82. A first fiber 1 is laid inside the inner ear portion 83. The two ends of the first fiber 1 are respectively laid inside the two sets of inner ear portions 83, and the middle part of the first fiber 1 extends into the first side beam 811 and the second side beam 812.

[0027] The first fiber 1 extends into the first side beam 811 and the second side beam 812, which can disperse the stress generated by the inner ear portion 83 and the outer ear portion 85 to the first side beam 811 and the second side beam 812, thereby reducing local stress concentration and enabling the first side beam 811 and the second side beam 812 to provide structural strength for the inner ear portion 83.

[0028] The first side beam 811 is located on one side near the double beam portion 82. The second fiber 2 is laid inside the first side beam 811. The two ends of the second fiber 2 are laid inside the inner ear portion 83 on both sides. The two ends of the second limiting part are laid inside the inner ear portion 83, which makes the integrity between the inner ear portions 83 stronger. This allows the stress on the inner ear portion 83 to be evenly distributed to the position of the first side beam 811, avoiding stress concentration on the inner ear portion 83, and improving the structural strength of the inner ear portion 83.

[0029] A third fiber 3 is laid inside the deep pit 81. The two ends of the third fiber 3 extend into the inner ear 83. Extending the third fiber 3 allows the stress generated in the deep pit 81 to diffuse to the rest of the structure, which can avoid stress concentration and thus improve the structural strength of the joint structure.

[0030] The inner ear portion 83 is also provided with a fourth fiber 4, which extends to the end of the double beam portion 82. The fourth fiber 4 can distribute stress on the double beam portion 82, making the stress in the inner ear portion 83 more dispersed, thereby improving the structural strength of the joint structure.

[0031] The deep pit section 81 is provided with a third side beam 813 and a fourth side beam 814, which are parallel to each other. A fifth fiber 5 is laid inside the third side beam 813 and extends into the inner ear section 83. A sixth fiber 6 is laid inside the fourth side beam 814 and extends into the inner ear section 83. The fifth fiber 5 and the sixth fiber 6 can strengthen the connection between the deep pit section 81 and the inner ear section 83, improve the overall structural strength, and enable the deep pit section 81 or the inner ear section 83 to immediately disperse stress after being subjected to stress, thus avoiding local stress concentration.

[0032] The cover plate 9 is lined with a seventh fiber 7, which divides the joint structure into different structures. The seventh fiber 7 is laid inside the cover plate 9 so that the stress transmitted to the cover plate 9 can be evenly distributed.

[0033] The main body 8 of the present invention can be further decomposed, thereby reducing the difficulty of fiber laying and making the impregnation process smoother. There are various ways to decompose, prepare and splice the main body 8.

[0034] Based on the thickness of each part of the joint structure and the thickness of the prepreg used in the joint, the number of prepreg layers required for each part of the joint structure is calculated. In order to facilitate the subsequent preparation of the preform, an even number of prepreg layers are used as a "modular layup group". In this invention, each layup group contains 4 layers of prepreg, and the layup angle of the fabric prepreg is [(±45) / (0, 90) / (0, 90) / (±45)]. By setting the above layup angle, the deformation of the joint structure during curing and use can be reduced.

[0035] Example 1 like Figure 5 As shown, the front ends of the third side beam 813 and the fourth side beam 814 extend to form inner ear portions 83. A first base plate 10 is provided on the lower side of the deep pit portion 81. A first gap 101 is formed between the first base plate 10 and the third side beam 813 and the fourth side beam 814. A lower wing plate 822 is provided on the plug plate 20. The lower wing plate 822 is inserted into the first gap 101. The double beam portion 82 includes an upper wing plate 821 and a lower wing plate 822. The upper wing plate 821 and the lower wing plate 822 are parallel to each other. The upper wing plate 821 is provided on the side close to the cover plate 9. The lower wing plate 822 is inserted into the first base plate 10. The two are spliced ​​to form the main body 8, so that the lower part of the deep pit portion 81 forms a double layer, and the structural strength is higher. By further fragmenting the structure on the main body 8, the difficulty of laying fibers is reduced, and the final quality of the joint structure is higher.

[0036] Example 2 like Figure 6 As shown, the front ends of the third side beam 813 and the fourth side beam 814 extend to form inner ear portions 83. A second base plate 30 is provided on the lower side of the deep pit portion 81. A second gap 301 is formed between the second base plate 30 and the third side beam 813 and the fourth side beam 814. The ear plate portion 40 is inserted into the second gap 301. An inner ear plate 401 is formed on the ear plate portion 40. The inner ear plate 401 fits against the inner ear portion 83. In this embodiment, reducing the inner ear plate 401 to be inserted into the gaps on both sides of the second base plate 30 alone can make the second base plate 30 more integrated. Since the inner ear plate 401 transmits stress to the structures on both sides of the second base plate 30, the stress is dispersed and transmitted, avoiding stress concentration.

[0037] Example 3 like Figure 7 As shown, the deep pit 81 includes a third base plate 50, a third gap 601 is formed on the inner ear member 60, the third base plate 50 is inserted into the third gap 601, an inner ear portion 83 is formed extending on the inner ear member 60, and the end of the double beam portion 82 is also provided on the inner ear member 60. The inner ear member 60 can directly form a space for placing the outer ear portion 85 on both sides, so that the space for placing the outer ear portion 85 has better strength and improves the strength of the joint structure.

[0038] In the above three sets of embodiments, the connection is made by plugging, which facilitates processing, simplifies the structure that the fibers are not good at laying, makes the subsequent impregnation process more uniform, improves the structural strength, and facilitates subsequent processing.

[0039] The first to seventh fibers mentioned in this invention are seven different fiber orientations, wherein the first to seventh fibers use the same type of fiber material.

[0040] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A connector structure, characterized in that, The device includes a main body (8) and a cover plate (9), the cover plate (9) covering the main body (8). The main body (8) includes a deep pit (81) and a double beam (82). The deep pit (81) is installed on one side of the double beam (82). The double beam (82) extends away from the deep pit (81) and forms two sets of inner ears (83). The inner ears (83) and the upper and lower wing plates (822) of the double beam (82) form an insertion groove (84). The outer ears (85) are inserted into the insertion groove (84). The fibers inside the inner ears (83) extend toward the deep pit (81) and the double beam (82).

2. The joint structure according to claim 1, characterized in that, The deep pit (81) is rectangular. A first side beam (811) and a second side beam (812) are provided on both sides of the edge of the deep pit (81). The first side beam (811) and the second side beam (812) are parallel to the length direction of the double beam part (82). A first fiber (1) is laid in the inner ear part (83). The two ends of the first fiber (1) are respectively laid in the two sets of the inner ear parts (83). The middle part of the first fiber (1) extends into the first side beam (811) and the second side beam (812).

3. The joint structure according to claim 2, characterized in that, The first side beam (811) is located on one side near the double beam portion (82), and the second fiber (2) is laid inside the first side beam (811). The two ends of the second fiber (2) are laid inside the inner ear portion (83) on both sides.

4. The joint structure according to claim 2, characterized in that, A third fiber (3) is laid inside the deep pit (81), and the two ends of the third fiber (3) extend into the inner ear (83).

5. The joint structure according to claim 1, characterized in that, The inner ear portion (83) is also provided with a fourth fiber (4), which extends to the end of the double beam portion (82).

6. The joint structure according to claim 2, characterized in that, The deep pit (81) is provided with a third side beam (813) and a fourth side beam (814), the third side beam (813) and the fourth side beam (814) are parallel to each other, a fifth fiber (5) is laid in the third side beam (813), the fifth fiber (5) extends into the inner ear (83), and a sixth fiber (6) is laid in the fourth side beam (814), the sixth fiber (6) extends into the inner ear (83).

7. The joint structure according to claim 1, characterized in that, The cover plate (9) is lined with a seventh fiber (7).

8. The joint structure according to claim 6, characterized in that, The inner ear portion (83) is formed by the front end extension of the third side beam (813) and the fourth side beam (814). A first bottom plate (10) is provided on the lower side of the deep pit portion (81). A first gap (101) is formed between the first bottom plate (10) and the third side beam (813) and the fourth side beam (814). A lower wing plate (822) is provided on the plug plate (20). The lower wing plate (822) is inserted into the first gap (101). The double beam portion (82) includes an upper wing plate (821) and a lower wing plate (822). The upper wing plate (821) and the lower wing plate (822) are parallel to each other. The upper wing plate (821) is provided on the side close to the cover plate (9).

9. The joint structure according to claim 6, characterized in that, The inner ear portion (83) extends from the front end of the third side beam (813) and the fourth side beam (814). A second bottom plate (30) is provided on the lower side of the deep pit portion (81). A second gap (301) is formed between the second bottom plate (30) and the third side beam (813) and the fourth side beam (814). The ear plate portion (40) is inserted into the second gap (301). An inner ear plate (401) is formed on the ear plate portion (40). The inner ear plate (401) fits against the inner ear portion (83).

10. The joint structure according to claim 6, characterized in that, The deep pit (81) includes a third base plate (50), a third gap (601) is formed on the inner ear (60), the third base plate (50) is inserted into the third gap (601), the inner ear (60) extends to form the inner ear portion (83), and the inner ear (60) is also provided with the end of the double beam portion (82).

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