Fixing frame

Abstract

The invention discloses a fixing frame which comprises two first cross beams, four bearing beams, two longitudinal beam assemblies and two second cross beams. The two ends of the bearing beams are fixedly connected with one ends of the first cross beams and one ends of the longitudinal beam assemblies correspondingly, so that the two first cross beams, the four bearing beams and the two longitudinal beam assemblies form a rectangular frame in a chamfer shape. The second cross beam is fixed in the rectangular frame body and is parallel to the first cross beam; at least one bearing part thread insert is arranged on the bearing beam; the first cross beam, the bearing beam, the longitudinal beam assembly and the second cross beam are all made of thermoplastic carbon fiber composite materials, the connected parts are fixed into a whole in a hot melting welding mode, the fixing mode is the advantages of thermoplastic carbon fibers, and surface protrusions generated by conventional connection are avoided.

Description

Technical Field

[0001] The present application relates to a fixing frame, belonging to the technical field of aerospace equipment. Background Art

[0002] With the development of science and technology, higher requirements are put forward for aerospace equipment, especially in terms of lightweight design. Since a large number of electrical equipment are often installed in aerospace, they need to be frequently fixed with fixed frames or fixed racks. The fixed frame is required to have sufficient strength and rigidity while also being lightweight. In addition, considering the cost and production efficiency, it is also necessary to adapt to mass production as much as possible. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present application provides a fixed frame, comprising two first cross beams, four load-bearing beams, two longitudinal beam assemblies and two second cross beams; the two ends of the load-bearing beams are respectively fixedly connected to one end of the first cross beam and one end of the longitudinal beam assembly, so that the two first cross beams, the four load-bearing beams and the two longitudinal beam assemblies constitute a rectangular frame with a chamfered shape; the second cross beam is fixed inside the rectangular frame and arranged parallel to the first cross beam; at least one load-bearing threaded insert is arranged on the load-bearing beam; the first cross beam, the load-bearing beam, the longitudinal beam assembly and the second cross beam are all made of thermoplastic carbon fiber composite materials, and the connected components are fixed together by hot melt welding.

[0004] In the above technical solution, further, it also includes two third cross beams and two oblique support beams, one end of the third cross beam is fixed on the longitudinal beam assembly, and the other end is fixedly connected to one end of the oblique support beam, and the other end of the oblique support beam is fixed on the longitudinal beam assembly; the longitudinal beam assembly, the oblique support beam and the third cross beam are connected to form a triangular structure located outside the rectangular frame.

[0005] In the above technical solution, further, the longitudinal beam assembly includes a long longitudinal beam and a short longitudinal beam, the short longitudinal beam is fixed on one side of the long longitudinal beam and is located outside the rectangular frame; the third cross beam and the oblique support beam are both fixedly connected to the short longitudinal beam.

[0006] In the above technical solution, further, the cross-sections of the long longitudinal beam and the short longitudinal beam are C-shaped, and the overall cross-section of the longitudinal beam assembly is I-shaped.

[0007] In the above technical solution, further, a corner piece is provided at the connection of two mutually connected parts.

[0008] In the above technical scheme, further, the corner piece includes a 135° corner piece, a right-angle corner piece, an extended right-angle corner piece, a single-sided extended right-angle corner piece, a 30° corner piece and a 60° corner piece; the 135° corner piece is used to connect two parts with a docking angle of 135°; the right-angle corner piece is used to connect two parts with a docking angle of 90°, and the mating surfaces of the two parts are straight surfaces; the extended right-angle corner piece is used to connect two parts with a docking angle of 90°, and the mating surfaces of the two parts are inclined surfaces; the single-sided extended right-angle corner piece is used to connect two parts with a docking angle of 90°, and the mating of the two parts is a plug-in mating structure; the 30° corner piece is used to connect two parts with a docking angle of 30°; the 60° corner piece is used to connect two parts with a docking angle of 60°.

[0009] In the above technical solution, further, it also includes a reinforcing piece, and the reinforcing piece is fixed at the position where the countersunk hole is set, the position where the threaded hole is set, or the position that needs local reinforcement.

[0010] In the above technical solution, further, the reinforcing member includes a block reinforcing member and a plate-mounted reinforcing member.

[0011] In the above technical solution, further, the load-bearing component threaded insert includes a corner load-bearing component threaded insert and a conventional load-bearing component threaded insert; the corner load-bearing component threaded insert is located at one end where the load-bearing beam is connected to the longitudinal beam assembly, and the corner load-bearing component threaded insert is provided with a fitting inclined surface for fitting with the longitudinal beam assembly.

[0012] In the above technical solution, further, one or more components among the first crossbeam, the load-bearing beam, the longitudinal beam assembly, the second crossbeam, the third crossbeam, and the diagonal support beam are provided with threaded holes and support plate nuts corresponding to the threaded holes.

[0013] The present application provides a fixed frame, which has the following beneficial effects:

[0014] The present application provides a fixed frame, in which all main components are thermoplastic carbon fiber composite materials, and the connected components are fixed together by hot-melt welding. This fixing method is an advantage of thermoplastic carbon fiber, and avoids surface protrusions caused by conventional connections, such as mechanical connections such as screwing and riveting. Mechanical connections require drilling holes in the composite material before connection, and drilling will damage the performance of carbon fiber. However, this is not the case with the fusion welding fixation of thermoplastic carbon fiber. Not only does it not require drilling, but also no protrusions will be generated on the surface of the frame after fusion welding fixation, which effectively reduces weight and improves the aesthetics of the outer surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0016] Figure 1 A three-dimensional structural schematic diagram of a fixed frame is provided for an embodiment of the present application;

[0017] Figure 2 A schematic diagram of the structure of a first crossbeam provided in an embodiment of the present application;

[0018] Figure 3 A schematic diagram of the structure of a load-bearing beam provided in an embodiment of the present application;

[0019] Figure 4 A schematic structural diagram of a load-bearing threaded insert provided in an embodiment of the present application;

[0020] Figure 5 A schematic diagram of the structure after the load-bearing beam and the load-bearing component threaded insert are assembled according to an embodiment of the present application;

[0021] Figure 6 A schematic diagram of the three-dimensional structure of a longitudinal beam assembly provided in an embodiment of the present application;

[0022] Figure 7 A schematic diagram of the structure of a second crossbeam provided in an embodiment of the present application;

[0023] Figure 8 A schematic structural diagram of a third crossbeam provided in an embodiment of the present application;

[0024] Fig. 9 A schematic diagram of the structure of the oblique support beam provided in an embodiment of the present application;

[0025] Fig.10 A schematic structural diagram of a corner piece provided in an embodiment of the present application;

[0026] Fig.11 A schematic diagram of the structure of a reinforcement member provided in an embodiment of the present application.

[0027] Description of reference numerals:

[0028] 1-first crossbeam; 2-load-bearing beam; 3-longitudinal beam assembly; 4-second crossbeam; 5-third crossbeam; 6-inclined support beam; 7-load-bearing member threaded insert; 71-corner load-bearing member threaded insert; 72-conventional load-bearing member threaded insert; 31-long longitudinal beam; 32-short longitudinal beam; 41-local raised structure; 81-135° corner piece; 82-right-angle corner piece; 83-extended right-angle corner piece; 84-single-side extended right-angle corner piece; 85-30° corner piece; 86-60° corner piece; 91-block reinforcement piece; 92-plate-mounted reinforcement piece. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0030] The embodiments based on the concepts of the present disclosure may be subjected to various changes and may have various forms, so specific embodiments will be exemplified in the drawings and described in detail in this specification or application. However, this is not to limit the embodiments based on the concepts of the present disclosure to specific disclosed forms, and should be understood to include all changes, equivalents and substitutes included in the ideas and technical scope of the present disclosure.

[0031] The terms "first" and "second" can be used to describe a variety of components, but the components are not limited by the terms. The terms are only used to distinguish one component from other components. For example, within the scope of the rights based on the concept of the present disclosure, the first component can be named as the second component, and similarly, the second component can also be named as the first component.

[0032] When a certain constituent element is said to be "connected" or "connected to" another constituent element, it should be understood that it can be directly connected to or connected to the other constituent element, or other constituent elements may be present in between. On the contrary, when a certain constituent element is said to be "directly connected to" or "directly connected to" another constituent element, it should be understood that no other constituent elements are present in between. Other expressions used to describe the relationship between constituent elements, that is, "between" or "directly between" or "adjacent to" or "directly adjacent to" etc., should also be interpreted in the same way.

[0033] The terms used in this specification are only used to illustrate specific embodiments and are not intended to limit the meaning of the present disclosure. Unless the contrary meaning is clearly stated in the context, the singular expression includes the plural expression. In this specification, the terms "including" or "having" are intended to specify the existence of a preset feature, number, step, action, constituent element, component or combination thereof, and should be understood as not excluding in advance the existence or additional possibility of one or more other features or numbers, steps, actions, constituent elements, components or combinations thereof.

[0034] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as those generally understood by a person of ordinary skill in the art to which the present disclosure belongs. Terms that are the same as those defined in a commonly used dictionary should be interpreted in a manner consistent with the meanings in the context of the relevant art, and should not be interpreted ideally or excessively as formal meanings unless explicitly defined in this specification.

[0035] In order to meet the performance requirements of aerospace equipment for strength, rigidity and lightness, it is necessary to redesign a fixed frame for installing various electrical equipment used in aerospace.

[0036] To this end, the present application provides a fixed frame, including two first cross beams, four load-bearing beams, two longitudinal beam assemblies and two second cross beams; the two ends of the load-bearing beam are respectively fixedly connected to one end of the first cross beam and one end of the longitudinal beam assembly, so that the two first cross beams, the four load-bearing beams and the two longitudinal beam assemblies constitute a rectangular frame with a chamfered shape; the second cross beam is fixed inside the rectangular frame and is arranged parallel to the first cross beam; at least one load-bearing threaded insert is arranged on the load-bearing beam; the first cross beam, the load-bearing beam, the longitudinal beam assembly and the second cross beam are all thermoplastic carbon fiber composite materials, and the connected components are fixed together by hot melt welding.

[0037] All major components are made of thermoplastic carbon fiber composite materials, and the connected components are fixed together by hot-melt welding. This fixing method is an advantage of thermoplastic carbon fiber, which avoids surface protrusions caused by conventional connections, such as mechanical connections such as screwing and riveting. Mechanical connections require drilling holes in the composite material before connection, and drilling will damage the performance of carbon fiber. However, this is not the case with the melt welding fixation of thermoplastic carbon fiber. Not only does it not require drilling, but also no protrusions will be produced on the surface of the frame after melt welding fixation, which effectively reduces weight and improves the aesthetics of the outer surface.

[0038] After each part is manufactured individually, it is assembled together. This structural design is also conducive to mass production.

[0039] In conjunction with the accompanying drawings, the above-mentioned design scheme of the present application is further elaborated in detail.

[0040] See also Figure 1 The fixed frame provided in the embodiment of the present application includes two first cross beams 1, four load-bearing beams 2, two longitudinal beam assemblies 3, two second cross beams 4, two third cross beams 5 and two oblique support beams 6.

[0041] See also Figure 2 The first crossbeam 1 provided in the embodiment of the present application is made of thermoplastic carbon fiber composite material, and its cross section is C-shaped, and the butt joint surface for connecting with the load-bearing beam 2 is an acute angled inclined surface. In some embodiments, the butt joint surface of the first crossbeam 1 is flush, the inclined surface angle is 45° to 70°, and the width of the first crossbeam 1 is 25 to 85 mm.

[0042] See also Figure 3The load-bearing beam 2 provided in the embodiment of the present application is made of thermoplastic carbon fiber composite material. The load-bearing beam 2 is designed to connect and install electrical equipment, and belongs to the area with a large load-bearing capacity. The cross-section of the load-bearing beam 2 is C-shaped. Compared with other beams, the wall thickness is thickened to ensure the strength of the fixed frame. In some embodiments, the load-bearing beam 2 is formed by molding. The interface between the load-bearing beam 2 and the longitudinal beam assembly 3 and the first cross beam 1 is an inclined surface at an angle.

[0043] In some embodiments, in order to ensure the matching accuracy requirements, the local matching surface of the load-bearing beam 2 is designed with a convex design.

[0044] See also Figure 1 , a load-bearing threaded insert 7 is provided in the load-bearing beam 2. Figure 4 and Figure 5 There are two types of load-bearing threaded inserts 7, which are divided into corner load-bearing threaded inserts 71 and conventional load-bearing threaded inserts 72 according to their positions and functions, so as to ensure the strength of the threaded holes at the corresponding positions, and at the same time further improve the strength of the load-bearing beam 2, and fix it to the load-bearing beam 2 as a whole through fusion welding.

[0045] Specifically, the corner load-bearing member threaded insert 71 is located at one end where the load-bearing beam 2 is connected to the longitudinal beam assembly 3 , and the corner load-bearing member threaded insert 71 is provided with a fitting inclined surface for fitting with the longitudinal beam assembly 3 .

[0046] See also Figure 6 The longitudinal beam assembly 3 provided in the embodiment of the present application includes a long longitudinal beam 31 and a short longitudinal beam 32, and both the long longitudinal beam 31 and the short longitudinal beam 32 are made of thermoplastic carbon fiber composite materials. The long longitudinal beam 31 is connected to the second cross beam 4 and the load-bearing beam 2, and the short longitudinal beam 32 is connected to the third cross beam 5 and the diagonal support beam 6. The cross-sections of the long longitudinal beam 31 and the short longitudinal beam 32 are both C-shaped, and the long longitudinal beam 31 and the short longitudinal beam 32 are fixed together by back-to-back hot-melt welding, so that the butt joint area forms a reinforced longitudinal beam with an I-shaped cross-section to further improve its strength so that this part can withstand a greater load. In some embodiments, the widths of the long longitudinal beam 31 and the short longitudinal beam 32 are the same, both of which are 15 to 85 mm.

[0047] See also Figure 7 The second cross beam 4 provided in the embodiment of the present application is made of thermoplastic carbon fiber composite material, and its cross section is C-shaped. A local protrusion structure 41 is provided on the docking surface for connecting with the longitudinal beam assembly 3. The longitudinal beam assembly 3 is provided with a plurality of corresponding grooves. During assembly, the protrusion structure is inserted into the groove, which not only facilitates the assembly of the position and reduces the manufacturing cost, but also ensures the overall strength.

[0048] The two second cross beams 4 are arranged back to back and symmetrically with respect to the perpendicular midline of the longitudinal beam assembly 3, so that the structure of the rectangular frame is more stable and the stress condition is more stable.

[0049] In some embodiments, the interface of the second cross beam 4 is flush, and the width of the second cross beam 4 is the same as that of the first cross beam 1, both of which are 25 to 85 mm.

[0050] See also Figure 1 to Figure 7 The two ends of the load-bearing beam 2 are respectively fixedly connected to one end of the first crossbeam 1 and one end of the longitudinal beam assembly 3, that is, the adjacent first crossbeams 1 and longitudinal beam assemblies 3 are connected through a load-bearing beam 2, so that two first crossbeams 1, four load-bearing beams 2, and two longitudinal beam assemblies 3 form a rectangular frame with a chamfered shape. The two ends of the second crossbeam 4 are respectively fixed to the long longitudinal beam 31 of a longitudinal beam assembly 3, fixed inside the rectangular frame, and arranged parallel to the first crossbeam 1.

[0051] See also Figure 8 The third cross beam 5 provided in the embodiment of the present application is made of thermoplastic carbon fiber composite material, and its cross section is C-shaped, and the butt joint surface for connecting with the longitudinal beam assembly 3 and the oblique support beam 6 is an acute angled inclined surface.

[0052] In some embodiments, the bevel angle of the butt joint surface of the third beam 5 is 20° to 43°. Since the force in this area is not large, the width is designed to be narrower, 15 to 65 mm, compared with the first beam 1 and the second beam 4 .

[0053] See also Fig. 9 The oblique support beam 6 provided in the embodiment of the present application is made of thermoplastic carbon fiber composite material, and its cross-section is C-shaped. Threaded holes are provided on the upper and lower surfaces of each oblique support beam 6, and support plate nuts are riveted on the inner surface to ensure the strength of the threaded holes.

[0054] See also Figure 1 , Figure 8 and Fig. 9 The first end of the third cross beam 5 is fixed on the longitudinal beam assembly 3, and the second end is fixedly connected to the first end of the oblique support beam 6, and the second end of the oblique support beam 6 is fixed to the longitudinal beam assembly 3. The longitudinal beam assembly 3, the oblique support beam 6 and the third cross beam 5 communicate to form a tripod structure located outside the rectangular frame.

[0055] In some embodiments, the tripod structure formed by the third cross beam 5 and the diagonal support beam 6 is a detachable structure, that is, the connection between the third cross beam 5 and the longitudinal beam assembly 3, the connection between the third cross beam 5 and the diagonal support beam 6, and the connection between the diagonal support beam 6 and the longitudinal beam assembly 3 are all detachable connections, for example, bolt connections. The detachable tripod structure can adapt to the installation environment more flexibly.

[0056] See also Figure 1In order to improve the connection strength of each component and the stability after connection, a corner piece is provided at the connection of the two interconnected components. In order to facilitate the hot-melt welding of the corner piece with other components, the material is also selected as thermoplastic carbon fiber. In order to reduce weight, the corner pieces are designed as thin-walled structures.

[0057] See also Fig.10 In some embodiments, according to different installation positions, the present application designs six corner pieces with different structures, namely: the corner pieces include a 135° corner piece 81, a right-angle corner piece 82, an extended right-angle corner piece 83, a single-sided extended right-angle corner piece 84, a 30° corner piece 85 and a 60° corner piece 86.

[0058] The 135° corner piece 81 includes two bottom plates and two vertical plates. One end of the two bottom plates is fixedly connected and forms an angle of 135°. The vertical plate is vertically connected to the edges of the two bottom plates. The two vertical plates are arranged in parallel. The 135° corner piece 81 is used to connect two parts with a butt joint angle of 135°. Specifically, the first cross beam 1 and the load-bearing beam 2 are connected by the 135° corner piece 81.

[0059] The right-angle corner piece 82 is used to connect two parts with a butt angle of 90°, and the mating surfaces of the two parts are straight surfaces.

[0060] The extended right-angle corner piece 83 is used to connect two parts with a butt angle of 90°, and the mating surfaces of the two parts are inclined surfaces.

[0061] The single-side extending right-angle corner piece 84 is used to connect two parts with a butt angle of 90°, and the two parts are matched in a plug-in matching structure.

[0062] The 30° corner piece 85 includes two bottom plates and two vertical plates. One end of the two bottom plates is fixedly connected and forms a 30° angle. The vertical plate is vertically connected to the edge of the two bottom plates. The two vertical plates are arranged in parallel. The 30° corner piece 85 is used to connect two parts with a butt joint angle of 30°. For example, the oblique support beam 6 and the longitudinal beam assembly 3 are fixedly connected through the 30° corner piece 85.

[0063] The 60° corner piece 86 includes two bottom plates and two vertical plates. One end of the two bottom plates is fixedly connected and forms a 60° angle. The vertical plate is vertically connected to the edge of the two bottom plates. The two vertical plates are arranged in parallel. The 60° corner piece 86 is used to connect two parts with a 60° butt angle. For example, the oblique support beam 6 and the third cross beam 5 are fixedly connected by the 60° corner piece 86.

[0064] See also Fig.11, the fixed frame provided in the embodiment of the present application needs to be provided with countersunk holes, threaded holes or partially strengthened. To solve these problems, different forms of reinforcements are designed. In some embodiments, there are mainly two types of reinforcements, namely block reinforcements 91 and plate-mounted reinforcements 92. Block reinforcements 91 are provided on the upper and lower surfaces of the long longitudinal beam 31, block reinforcements 91 are provided on the upper and lower surfaces of the first crossbeam 1, and plate-mounted reinforcements 92 are provided on the back of the first crossbeam 1.

[0065] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole and the technical solutions in each embodiment.

Claims

1. A fixed frame, characterized in that: It comprises two first cross beams, four load-bearing beams, two longitudinal beam assemblies and two second cross beams; the two ends of the load-bearing beams are respectively fixedly connected with one end of the first cross beam and one end of the longitudinal beam assembly, so that the two first cross beams, the four load-bearing beams and the two longitudinal beam assemblies form a rectangular frame with a chamfered shape; the second cross beams are fixed inside the rectangular frame and arranged parallel to the first cross beams; at least one load-bearing threaded insert is arranged on the load-bearing beam; the first cross beam, the load-bearing beam, the longitudinal beam assembly and the second cross beam are all made of thermoplastic carbon fiber composite materials, and the connected parts are fixed as a whole by hot-melt welding.

2. A fixing frame according to claim 1, characterized in that: It also includes two third cross beams and two oblique support beams, one end of the third cross beam is fixed on the longitudinal beam assembly, and the other end is fixedly connected to one end of the oblique support beam, and the other end of the oblique support beam is fixed on the longitudinal beam assembly; the longitudinal beam assembly, the oblique support beam and the third cross beam are connected to form a triangular structure located outside the rectangular frame.

3. A fixing frame according to claim 2, characterized in that: One or more of the first crossbeam, the load-bearing beam, the longitudinal beam assembly, the second crossbeam, the third crossbeam, and the diagonal support beam are provided with threaded holes and support plate nuts corresponding to the threaded holes.

4. A fixing frame according to claim 2, characterized in that: The longitudinal beam assembly comprises a long longitudinal beam and a short longitudinal beam, wherein the short longitudinal beam is fixed on one side of the long longitudinal beam and is located outside the rectangular frame; the third cross beam and the oblique support beam are both fixedly connected to the short longitudinal beam.

5. A fixing frame according to claim 4, characterized in that: The cross-sections of the long longitudinal beam and the short longitudinal beam are C-shaped, and the overall cross-section of the longitudinal beam assembly is I-shaped.

6. A fixing frame according to claim 1, characterized in that: A corner piece is provided at the connection of the two parts connected to each other.

7. A fixing frame according to claim 6, characterized in that: The corner pieces include 135° corner pieces, right-angle corner pieces, extended right-angle corner pieces, single-sided extended right-angle corner pieces, 30° corner pieces and 60° corner pieces; the 135° corner piece is used to connect two parts with a butt angle of 135°; the right-angle corner piece is used to connect two parts with a butt angle of 90°, and the mating surfaces of the two parts are straight surfaces; the extended right-angle corner piece is used to connect two parts with a butt angle of 90°, and the mating surfaces of the two parts are inclined surfaces; the single-sided extended right-angle corner piece is used to connect two parts with a butt angle of 90°, and the mating of the two parts is a plug-in mating structure; the 30° corner piece is used to connect two parts with a butt angle of 30°; the 60° corner piece is used to connect two parts with a butt angle of 60°.

8. A fixing frame according to claim 1, characterized in that: It also includes a reinforcing piece, which is fixed at a location where a countersunk hole is set, a location where a threaded hole is set, or a location that requires local reinforcement.

9. A fixing frame according to claim 8, characterized in that: The reinforcing members include block-shaped reinforcing members and plate-mounted reinforcing members.

10. A fixing frame according to claim 1, characterized in that: The load-bearing component threaded insert includes a corner load-bearing component threaded insert and a conventional load-bearing component threaded insert; the corner load-bearing component threaded insert is located at one end where the load-bearing beam is connected to the longitudinal beam assembly, and the corner load-bearing component threaded insert is provided with a fitting inclined surface for fitting with the longitudinal beam assembly.

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