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CN-122014727-A - Joint structure

CN122014727ACN 122014727 ACN122014727 ACN 122014727ACN-122014727-A

Abstract

The invention belongs to the technical field of part manufacturing, and discloses a joint structure. The novel composite material connector comprises a main body and a cover plate, wherein the cover plate is connected to the main body in a covering mode, the main body comprises a pit part and a double-beam part, the pit part is arranged on one side of the double-beam part, two groups of inner lugs are formed on one side of the double-beam part away from the pit part in an extending mode, an inserting groove is formed by surrounding the inner lugs with upper wing plates and lower wing plates of the double-beam part, the outer lug part is inserted into the inserting groove, fibers in the inner lugs extend to the pit part and the double-beam part, and the problem that local quality defects can occur when the connector is prepared by utilizing the composite material in the prior art is solved.

Inventors

  • ZHANG MIN
  • CHEN CHAO
  • FAN BAOZHONG
  • LIU YANJUN
  • CHEN JUNLIN
  • HU CHENXUE
  • YAN YING
  • JI JIAJIA
  • CUI WEIJUN

Assignees

  • 中国商用飞机有限责任公司
  • 上海飞机制造有限公司

Dates

Publication Date
20260512
Application Date
20260320

Claims (10)

  1. 1. The utility model provides a joint structure, its characterized in that includes main part (8) and apron (9), apron (9) lid connects on main part (8), main part (8) are including pit portion (81) and double-beam portion (82), pit portion (81) are installed double-beam portion (82) one side, double-beam portion (82) are kept away from pit portion (81) one side extension is formed with two sets of interior ears (83), interior ears (83) with upper and lower pterygoid lamina (822) of double-beam portion (82) enclose into grafting groove (84), outer ear portion (85) are pegged graft in grafting groove (84), the inside fibre of interior ears (83) is to pit portion (81) and double-beam portion (82) extend.
  2. 2. Joint structure according to claim 1, characterized in that the pit portion (81) is rectangular, a first side beam (811) and a second side beam (812) are arranged at two sides of the edge of the 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 in the inner ear portion (83), two ends of the first fiber (1) are respectively laid in the two groups of inner ear portions (83), and the middle part of the first fiber (1) is extended and laid into the first side beam (811) and the second side beam (812).
  3. 3. Joint structure according to claim 2, characterized in that the first side beam (811) is arranged on the side close to the double beam portion (82), that a second fiber (2) is laid in the first side beam (811), and that both ends of the second fiber (2) are laid in the inner ear portions (83) on both sides.
  4. 4. Joint construction according to claim 2, characterized in that a third fibre (3) is laid in the pit (81), both ends of the third fibre (3) extending into the inner ear (83).
  5. 5. Joint construction according to claim 1, characterized in that the inner ear (83) is further provided with a fourth fiber (4), which fourth fiber (4) extends to the end of the double beam (82).
  6. 6. Joint structure according to claim 2, characterized in that the pit part (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) being parallel to each other, a fifth fiber (5) being laid in the third side beam (813), the fifth fiber (5) extending into the inner ear part (83), a sixth fiber (6) being laid in the fourth side beam (814), the sixth fiber (6) extending into the inner ear part (83).
  7. 7. Joint construction according to claim 1, characterized in that the cover plate (9) is laid with seventh fibres (7) inside.
  8. 8. The joint structure according to claim 6, wherein the third side beam (813) and the fourth side beam (814) are formed with the inner ear portion (83) extending from front ends, the pit portion (81) is provided with a first bottom plate (10) at a lower side, 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 board (20), the lower wing plate (822) is inserted in 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, and the upper wing plate (821) is provided at a side close to the cover plate (9).
  9. 9. The joint structure according to claim 6, wherein the front ends of the third side beam (813) and the fourth side beam (814) are extended to form the inner ear portion (83), a second bottom plate (30) is disposed at the lower side of the 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), an ear plate portion (40) is inserted into the second gap (301), an inner ear plate (401) is formed on the ear plate portion (40), and the inner ear plate (401) is attached to the inner ear portion (83).
  10. 10. Joint structure according to claim 6, characterized in that the pit part (81) comprises a third bottom plate (50), a third gap (601) is formed on the inner ear piece (60), the third bottom plate (50) is inserted in the third gap (601), the inner ear piece (60) is formed with the inner ear part (83) in an extending way, and the inner ear piece (60) is further provided with the end part of the double beam part (82).

Description

Joint structure Technical Field The invention relates to the technical field of part manufacturing, in particular to a joint structure. Background In the technical field of aerospace, the performance of a structural connecting piece directly relates to the safety and reliability of the whole aircraft, a joint is used as a key structural connecting part, the main function of the structural connecting piece is to effectively connect structural members at different positions and realize load transmission and distribution, and the design, material selection and manufacturing process of the joint become core elements for determining the performance of the whole structure because the aircraft needs to bear complex mechanical environment and changeable thermal load in the operation process. For joints with complex structures, metal materials are conventionally used for preparation, however, the metal materials have some inherent limitations in practical application, the thermal expansion coefficient of metal is large, in an aerospace environment with severe temperature variation, the connection structure of the joint and accessories of the joint is easy to loosen, deform and even crack, structural failure can be caused when the joint is severe, in addition, the density of the metal materials is high, the lightweight design of an aircraft is not facilitated, and the problem of conflict with urgent requirements for weight reduction in the aerospace field is solved. In order to overcome the defects of metal materials, the composite material gradually becomes an ideal choice for joint preparation due to the advantages of high specific strength, large specific modulus, fatigue resistance, strong designability and the like, and the composite material preparation of the joint with a complex structure adopts a layer-by-layer stacking molding technology, but the method has obvious limitations in practical application, and is difficult to realize multidirectional bifurcation in the molding process, particularly in a joint area with the characteristics of deep cavities, multidirectional bending, forking and the like, the uniformity and continuity of fiber laying are difficult to ensure, and meanwhile, the resin matrix has poor flowability in bending and forking areas, so that local infiltration is easy to be poor, further quality defects such as pores, dry spots and the like are formed, and the defects not only reduce the mechanical property of the joint, but also can become stress concentration points, and cause early failure in the service process. Disclosure of Invention The invention aims to provide a joint structure which solves the problem that local quality defects can occur when a joint is prepared by using a composite material in the prior art. The invention provides a joint structure, which comprises a main body and a cover plate, wherein the cover plate is covered on the main body, the main body comprises a deep pit part and a double-beam part, the deep pit part is arranged on one side of the double-beam part, two groups of inner lugs are formed by extending from one side of the double-beam part away from the deep pit part, an inserting groove is formed by surrounding the inner lugs and upper and lower wing plates of the double-beam part, the outer lug part is inserted in the inserting groove, and fibers in the inner lugs extend to the deep pit part and the double-beam part. Preferably, the pit portion is rectangular, first side beams and second side beams are arranged on two sides of the edge of the pit portion, the first side beams and the second side beams are parallel to the length direction of the double-beam portion, first fibers are paved in the inner ear portion, two ends of the first fibers are paved in the two groups of inner ears respectively, and the middle parts of the first fibers extend and are paved into the first side beams and the second side beams. Preferably, the first side beam is disposed at a side close to the double beam portion, the second fiber is laid in the first side beam, and both ends of the second fiber are laid in the inner ear portions at both sides. Preferably, third fibers are laid in the pit portion, and both ends of the third fibers extend into the inner ear portion. Preferably, the inner ear is further provided with a fourth fiber extending to an end of the double beam portion. Preferably, the pit part 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, fifth fibers are laid in the third side beam, the fifth fibers extend into the inner ear part, sixth fibers are laid in the fourth side beam, and the sixth fibers extend into the inner ear part. Preferably, a seventh fiber is laid in the cover plate. Preferably, the inner ear part is formed at the front ends of the third side beam and the fourth side beam in an extending manner, a first bottom plate is arranged at the lower side of the pit, a first