Frame assembly and preparation method

Abstract

A frame assembly and a preparation method belong to the technical field of frame connection. The frame assembly comprises a first frame strip, a second frame strip and a corner connector. The corner connector is provided with a first connecting piece and a second connecting piece which are connected at a preset angle, and the second connecting piece is bonded to the inner wall of the end of the second frame strip through a second fiber resin adhesive layer. The first connecting piece comprises a first connecting sleeve and a first connecting arm, and the first connecting sleeve is bonded to the inner wall of the end of the first frame strip through a first fiber resin adhesive layer. When the frame assembly is assembled, the second matching piece at the first connecting arm penetrates into the first channel through the first opening of the first connecting sleeve to be connected with the first matching piece in a clamped mode, gluing is not needed on the installation site, the frame strip does not need to be holed, the assembly operation of the frame assembly can be simplified, and the stability of the frame assembly is improved.

Description

Technical Field

[0001] The present application relates to the field of frame connection technology, and in particular to a frame assembly and a preparation method thereof. Background Art

[0002] Currently, photovoltaic frames are primarily made of aluminum alloy profiles, assembled primarily through aluminum alloy corner brackets with press-fit holes for positional installation. However, as a high-carbon emission material, aluminum alloy will likely limit its further development in terms of production capacity and carbon footprint verification.

[0003] Fiber-reinforced composites, a lightweight, high-strength, and highly designable new material, offer significant advantages in performance and carbon emissions. They are currently being used on a large scale in photovoltaic packaging. However, composite materials are fiber-reinforced resins, making it difficult to secure corner brackets and form a stable frame using methods similar to aluminum alloy plastic punching.

[0004] The current packaging method for fiber-reinforced resin frames involves needle-punching glue on the inner side of the frame, creating raised glue spots to position the corners. However, this solution is prone to failure because not all glue injection points are simultaneously stressed, resulting in damage to the packaging structure. Summary of the Invention

[0005] Based on the above-mentioned deficiencies, the present application provides a frame assembly and a preparation method to improve the problem of low frame connection strength in the related art.

[0006] This application is implemented as follows:

[0007] In a first aspect, an example of the present application provides a frame assembly, comprising a first frame strip, a second frame strip, and a corner bracket. The corner bracket comprises a first connector and a second connector connected at a preset angle; the first connector comprises a first connecting sleeve and a first connecting arm, the first connecting sleeve being bonded to the inner wall of the end of the first frame strip via a first fiber resin adhesive layer; the first connecting sleeve is internally provided with a first channel and a first opening communicating with the first channel, a first mating piece being provided at a circumferential edge of the first connecting sleeve; the first connecting arm is provided with a second mating piece for penetrating the first channel through the first opening and engaging with the first mating piece; the second connector is bonded to the inner wall of the end of the second frame strip via a second fiber resin adhesive layer.

[0008] In the above implementation process, the second connector of the angle bracket is bonded to the inner wall of the end of the second frame strip through the second fiber resin layer, and a first connecting arm of the first connecting sleeve that can be mutually engaged is provided in the first connector of the angle bracket, and the first connecting sleeve is bonded to the inner wall of the end of the first frame strip through the first fiber resin adhesive layer. Therefore, when the operator assembles the frame assembly on site, he only needs to insert the second mating piece of the first connecting arm into the first channel through the first opening of the first connecting sleeve and engage with the first mating piece. The operator does not need to apply glue on site at the installation site. The embodiment of the present application bonds the corresponding connectors and frame strips through the first fiber resin adhesive layer and the second fiber resin adhesive layer, which does not require the frame strips to be perforated. It is suitable for connecting frame strips made of fiber resin materials that are difficult to perforate, and has high adaptability. Moreover, the combination of the fiber fabric and the resin adhesive in the fiber resin adhesive layer can not only improve the strength of the fiber resin adhesive layer itself, but also improve the bonding strength between the fiber resin adhesive layer and the inner wall of the frame strip and the outer wall of the first connecting sleeve / the outer wall of the second connector, thereby improving the overall strength of the assembled frame structure.

[0009] In combination with the first aspect, in an optional embodiment of the present application, the second connecting member includes a second connecting arm, and the second connecting arm is bonded to the inner wall of the end of the second frame bar through a second fiber resin adhesive layer.

[0010] In the above implementation process, the second connecting arm is directly bonded to the inner wall of the end of the second frame bar through the second fiber resin adhesive layer. Under the premise of ensuring the connection strength and connection convenience of the frame assembly, a connecting sleeve can be omitted in the second frame bar. In the entire first frame bar and second frame bar connection structure, only one first connecting sleeve can be set on the inner wall of the end of the second frame bar, which can save production costs.

[0011] In combination with the first aspect, in an optional embodiment of the present application, the second connecting member includes a second connecting sleeve and a second connecting arm, and the second connecting sleeve is bonded to the inner wall of the end of the second frame bar through a second fiber resin adhesive layer; the interior of the second connecting sleeve is provided with a second channel and a second opening connected to the second channel, and a third matching member is provided at the circumferential edge of the second connecting sleeve; the second connecting arm is provided with a fourth matching member, which is used to penetrate into the second channel through the second opening and engage with the third matching member.

[0012] In the above implementation process, the inner wall of the end of the first frame strip and the inner wall of the end of the second frame strip are both bonded with a connecting sleeve via a fiber resin adhesive layer. When assembling the frame assembly, the operator can insert the second mating piece at the first connecting arm of the corner bracket into the first channel through the first opening of the first connecting sleeve and engage with the first mating piece, and insert the fourth mating piece at the second connecting arm of the corner bracket into the second channel through the second opening of the second connecting sleeve and engage with the third mating piece. When assembling the frame assembly, there is no need for on-site gluing or opening the frame strips. Furthermore, if it is discovered that some frame strips are of substandard quality due to transportation or other reasons and need to be discarded, the discarded frame strips are not bonded to the main structure of the corner bracket, such as the connecting arm, thereby saving the production cost of the corner bracket to a certain extent.

[0013] In combination with the first aspect, in an optional embodiment of the present application, the first fiber resin adhesive layer and the second fiber resin adhesive layer both include fiber fabrics and resin adhesive filled inside the fiber fabrics and attached to the surface and solidified.

[0014] Optionally, the fiber fabric includes fiber felt or fiber cloth.

[0015] Optionally, the material of the fiber fabric includes at least one of glass fiber, carbon fiber, basalt fiber or aramid fiber.

[0016] Optionally, the resin glue includes epoxy glue, acrylic glue or polyurethane glue.

[0017] Optionally, the first fiber resin adhesive layer and / or the second fiber resin adhesive layer contains filler particles.

[0018] Optionally, the average particle size of the filler particles is 0.5 to 5 μm.

[0019] Optionally, the filler particles include at least one of silicon dioxide powder, silicon carbide powder, silicon nitride powder, aluminum oxide powder, zinc oxide powder, titanium dioxide powder, calcium carbonate, and aluminum hydroxide powder.

[0020] In the above implementation process, the fiber fabric and resin adhesive are combined to provide a reinforcement, increasing the strength of the fiber-resin adhesive layer. The resin adhesive fills the fiber fabric and adheres to the surface, bonding the frame strips and corresponding connectors together, thereby increasing the overall strength of the frame assembly.

[0021] In addition, filler particles are added to the first fiber resin adhesive layer. The combination of filler particles and fiber fabric can not only further increase the strength of the adhesive layer itself, but also inhibit the shrinkage rate of the resin adhesive during curing, reduce the holes in the fiber resin adhesive layer, and improve the connection strength of the fiber resin adhesive layer, thereby improving the overall connection strength of the frame assembly.

[0022] In combination with the first aspect, in an optional embodiment of the present application, the first mating piece includes a third opening arranged on the side wall of the first connecting sleeve, and the third opening is connected to the first channel; the second mating piece includes a boss protruding from the end of the first connecting arm; when the first connecting arm is connected to the first connecting sleeve, the boss contracts, and after passing through the first opening into the first channel to the position of the third opening, the boss rebounds and engages with the third opening.

[0023] In the above implementation, a third opening communicating with the first channel is provided on the side wall of the first connecting sleeve, and a boss is provided at the end of the first connecting arm. When the frame assembly needs to be assembled, pressure can be applied to the boss of the first connecting arm to cause it to contract, extending from the first opening into the first channel. The boss is held in a contracted state by the pressure from the side wall of the connecting sleeve. When the boss moves to the third opening on the side wall, the pressure applied by the first connecting sleeve on the boss disappears, and the boss rebounds and clamps to the third opening.

[0024] In combination with the first aspect, in an optional embodiment of the present application, the material of the first frame strip and the second frame strip includes a fiber-reinforced resin material.

[0025] Optionally, the fiber-reinforced resin material includes a glass fiber-reinforced resin material or a carbon fiber-reinforced resin material.

[0026] In the above implementation process, the frame strips are prepared using fiber resin reinforced materials. The fiber resin reinforced materials have light weight and high strength properties and can improve the strength of the frame assembly.

[0027] In a second aspect, an example of the present application provides a method for preparing a frame assembly, comprising:

[0028] A first frame strip, a second frame strip, and an angle bracket are obtained. The angle bracket comprises a first connecting member and a second connecting member connected at a predetermined angle. The first connecting member comprises a first connecting sleeve and a first connecting arm. The first connecting sleeve is internally provided with a first channel and a first opening communicating with the first channel. A first mating member is provided at a circumferential edge of the first connecting sleeve. The first connecting arm is provided with a second mating member, which can penetrate the first channel through the first opening and engage with the first mating member.

[0029] The fiber fabric is impregnated in resin glue to form a first adhesive sheet and a second adhesive sheet respectively.

[0030] Before the resin glue is cured, the first adhesive sheet is attached to the outer wall of the first connecting sleeve, and the first connecting sleeve with the first adhesive sheet is inserted into the first frame strip to interference fit with the inner wall of the end of the first frame strip and cured.

[0031] Before the resin glue is cured, the second adhesive sheet is attached to the outer wall of the second connecting member, and the second connecting member with the second adhesive sheet is inserted into the second frame bar to interference fit with the inner wall of the end of the second frame bar and cured.

[0032] In the above implementation process, when preparing the frame assembly, a patch formed by impregnating the fiber fabric in resin glue is attached to the outer wall of the corresponding second connecting piece or the first connecting sleeve, and then before the resin glue is cured, the first connecting sleeve and the second connecting piece with the patch are inserted into the corresponding frame strips one by one to form an interference fit with the inner wall of the frame strip end. Since the fiber fabric can be deformed, under the force of the interference fit, an extrusion effect is exerted on the first patch, causing the resin glue in the fiber fabric to overflow and fully contact the inner wall of the frame strip and the outer wall of the first connecting sleeve or the second connecting piece. In addition, the fiber fabric can also play a role in increasing the strength of the resin glue, thereby improving the connection strength and the stability of the frame strip. In the process of preparing the frame assembly, there is no need to perform processing such as opening holes on the frame strip, which can improve the strength of the frame strip itself and further improve the overall strength of the frame assembly. When the frame assembly is made according to the above preparation method, the operator can use the first connecting arm in the corner code at the second frame strip to clamp with the appropriate first frame strip as needed when assembling the frame assembly on site. No glue or opening holes are required at the installation site, simplifying the installation process.

[0033] In conjunction with the second aspect, in an optional embodiment of the present application, the second connecting member includes a second connecting sleeve and a second connecting arm, the interior of the second connecting sleeve is provided with a second channel and a second opening connected to the second channel, and a third matching member is provided at the circumferential edge of the second connecting sleeve. The second connecting arm is provided with a fourth matching member, which can penetrate the second channel through the second opening and engage with the third matching member. The method of attaching the second adhesive sheet to the outer wall of the second connecting member includes: attaching the second adhesive sheet to the outer wall of the second connecting sleeve, extending the second connecting sleeve with the second adhesive sheet into the second frame strip to achieve an interference fit with the inner wall of the end of the second frame strip, and curing.

[0034] In the above implementation process, when the second connecting member is pasted on the inner wall of the end of the second frame strip, the second adhesive sheet can be pasted on the outer wall of the second connecting sleeve, and then the second connecting sleeve is pushed into the interior of the second frame strip to have an interference fit with the inner wall of the end of the second frame strip. Under the force of the interference fit, the second adhesive sheet will be squeezed, so that the resin glue in the fiber fabric overflows and fully contacts the inner wall of the second frame strip and the outer wall of the second connecting sleeve. In addition, the fiber fabric can also play a role in increasing the strength of the resin glue, thereby increasing the connection strength and improving the stability of the frame strip. According to the frame assembly made by the above preparation method, when the operator assembles the frame assembly on site, he can use the first connecting arm and the second connecting arm in the corner code to clamp with the appropriate frame strip as needed. No glue or hole drilling is required at the installation site, simplifying the installation process. When the first frame strip or the second frame strip has quality problems and cannot be used, since the corner code body provided with two connecting arms is not fixedly bonded in the defective frame strip, waste of the corner code body can be avoided. Similarly, during the actual installation process, when the first connecting arm or the second connecting arm in the angle code is defective, since the first connecting arm and the second connecting arm are not bonded to the frame strip, waste of the frame strip can be avoided, saving costs.

[0035] In combination with the second aspect, in an optional embodiment of the present application, the fiber fabric includes fiber felt or fiber cloth.

[0036] Optionally, the material of the fiber fabric includes at least one of glass fiber, carbon fiber, basalt fiber or aramid fiber.

[0037] Optionally, the resin glue includes epoxy glue, acrylic glue or polyurethane glue.

[0038] In combination with the second aspect, in an optional embodiment of the present application, the resin glue further includes filler particles, and the filler particles account for 5% to 20% of the total mass of the resin glue.

[0039] Optionally, the filler particles account for 10% to 15% of the total mass of the resin glue.

[0040] Optionally, the viscosity of the resin glue is 1000-1500 Pa·s.

[0041] In the above implementation process, the fiber fabric and resin adhesive are combined to provide a reinforcement, increasing the strength of the fiber-resin adhesive layer. The resin adhesive fills the fiber fabric and adheres to the surface, bonding the frame strip and corresponding connectors together, thereby increasing the overall strength of the frame strip.

[0042] In addition, filler particles are added to the first fiber resin adhesive layer. The combination of filler particles and fiber fabric can not only further increase the strength of the adhesive layer itself, but also inhibit the shrinkage rate of the resin adhesive during curing, reduce the holes in the fiber resin adhesive layer, and improve the connection strength of the fiber resin adhesive layer, thereby improving the overall connection strength of the frame assembly.

[0043] Furthermore, adjusting the viscosity of the resin adhesive to 1000-1500 Pa·s can make the resin adhesive have appropriate fluidity, enable full contact with the fiber fabric, the inner wall of the frame strip and the outer wall of the connection, and improve the connection strength after curing. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0045] Figure 1 A schematic diagram of a first state of a frame assembly provided as an example of this application;

[0046] Figure 2 An exploded view of the first frame assembly provided as an example of this application;

[0047] Figure 3 An exploded view of the second frame assembly provided as an example of this application;

[0048] Figure 4 This is a schematic diagram of the second state of the frame assembly provided in the example of this application.

[0049] Icon: 1-frame assembly; 10-first frame strip; 11-first slope; 20-second frame strip; 21-second slope; 30-corner code; 31-first connecting piece; 311-first connecting sleeve; 3111-first channel; 3112-first opening; 3113-first matching piece; 312-first connecting arm; 3121-second matching piece; 32-second connecting piece; 321-second connecting sleeve; 3211-second channel; 3212-second opening; 3213-third matching piece; 322-second connecting arm; 3221-fourth matching piece; 33-first fiber resin adhesive layer; 34-second fiber resin adhesive layer. DETAILED DESCRIPTION

[0050] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions.

[0052] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0053] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0054] Current photovoltaic frames are primarily made of aluminum alloy profiles, and their assembly is primarily achieved through the use of aluminum alloy angle brackets with press-fit holes. For example, one end of the angle bracket is inserted into the frame strip, and then both the angle bracket and the frame strip are stamped together. During the molding process, the frame and the angle bracket are stamped together, and the resulting concave points on the frame coincide with the deformed areas on the angle bracket, securing the angle bracket to the frame.

[0055] Fiber-reinforced composites, a lightweight, high-strength, and highly designable new material, have begun to be widely used in photovoltaic packaging. However, composite materials are fiber-reinforced resins, making them difficult to secure corner brackets and form stable frames using methods similar to aluminum alloy plastic punching.

[0056] The current packaging method for fiber-reinforced resin frames involves needle-punching glue on the inner side of the frame, creating raised glue spots to position the corners. However, this solution is prone to failure because not all glue injection points are simultaneously stressed, resulting in damage to the packaging structure.

[0057] Therefore, the present application further improves the frame assembly and its preparation method, thereby improving the assembly problem of the frame assembly to a certain extent. To make the purpose, technical solution and advantages of the embodiments of the present application more clear, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0058] See also Figure 1An embodiment of the present application provides a frame assembly 1, including a first frame strip 10, a second frame strip 20 and a corner code 30.

[0059] Please combine Figure 1 and Figure 2 The angle bracket 30 includes a first connecting member 31 and a second connecting member 32 connected at a preset angle. The first connecting member 31 includes a first connecting sleeve 311 and a first connecting arm 312. The first connecting sleeve 311 is bonded to the inner wall of the end of the first frame strip 10 via a first fiber resin adhesive layer 33. The first connecting sleeve 311 is internally provided with a first channel 3111 and a first opening 3112 communicating with the first channel 3111. A first mating member 3113 is provided at the circumferential edge of the first connecting sleeve 311. The first connecting arm 312 is provided with a second mating member 3121, which is used to penetrate the first channel 3111 through the first opening 3112 and engage with the first mating member 3113. The second connecting member 32 is bonded to the inner wall of the end of the second frame strip 20 via a second fiber resin adhesive layer 34.

[0060] When an operator assembles the frame assembly 1 provided in the embodiment of the present application on-site, the operator only needs to insert the second mating piece 3121 at the first connecting arm 312 into the first channel 3111 through the first opening 3112 of the first connecting sleeve 311 and engage the first mating piece 3113. The operator does not need to apply glue on-site at the installation site. The embodiment of the present application uses the first fiber resin adhesive layer 33 and the second fiber resin adhesive layer 34 to bond the corresponding connecting sleeves and connecting pieces. This eliminates the need to make holes in the frame strips and is suitable for connecting frame strips made of materials such as fiber resin materials that are difficult to make holes in, thus having high adaptability. Moreover, the combination of the fiber fabric and the resin adhesive in the fiber resin adhesive layer can not only improve the strength of the fiber resin adhesive layer itself, but also improve the bonding strength between the fiber resin adhesive layer and the inner wall of the frame strip and the outer wall of the first connecting sleeve 311 / the outer wall of the second connecting piece 32, thereby improving the overall strength of the frame assembly 1.

[0061] It is understandable that the frame assembly 1 provided in the embodiment of the present application has at least two states, including: Figure 1 In the first state shown, the second matching piece 3121 of the first connecting arm 312 does not pass through the first opening 3112 into the first channel 3111 and engages with the first matching piece 3113. Figure 4 In the second state shown, the second engaging member 3121 of the first connecting arm 312 has passed through the first opening 3112 into the first channel 3111 and is engaged with the first engaging member 3113 .

[0062] It is understood that the first frame strip 10 and the second frame strip 20 are hollow profiles. The present application does not limit the specific structure and material of the first frame strip 10 and the second frame strip 20, which can be selected according to conventional frame strip structures and materials in the art.

[0063] As an example, the first frame strip 10 and the second frame strip 20 may be made of metal or composite materials. Metals include, but are not limited to, aluminum or aluminum alloys. Composite materials include, but are not limited to, fiber-reinforced resin materials such as glass fiber reinforced resin materials and carbon fiber reinforced resin materials.

[0064] As an example, combine Figure 1 and Figure 4 The first frame strip 10 and the second frame strip 20 can be connected to form a right-angle structure through the angle bracket 30. The end surface of the first frame strip 10 close to the second frame strip 20 is a first inclined surface 11, and the end surface of the second frame strip 20 close to the first frame strip 10 is a second inclined surface 21. The inclination angle of the first inclined surface 11 and the inclination angle of the second inclined surface 21 are complementary to each other.

[0065] For example, the angle between the first inclined surface 11 and the vertical direction is α1, the angle between the second inclined surface 21 and the vertical direction is α2, and the sum of α1 and α2 is 90°. For example, both α1 and α2 can be 45°. Alternatively, α1 can be 30°, and α2 can be 60°.

[0066] It is understood that the term "mutual complement" as used herein refers to industrially achievable values, where the first inclined surface 11 and the second inclined surface 21 are aligned to allow the first frame strip 10 and the second frame strip 20 to be approximately perpendicular. The terms "perpendicular," "mutual complement," and "90°" as used herein are industrially achievable values, and may have certain unavoidable errors compared to absolute mathematical values.

[0067] The angle bracket 30 includes a first connecting member 31 and a second connecting member 32 connected at a preset angle. The angle between the first connecting member 31 and the second connecting member 32 is adapted to the connection angle requirement of the first frame strip 10 and the second frame strip 20 .

[0068] For example, when the first frame strip 10 and the second frame strip 20 need to be connected to form a vertical structure, please refer to Figure 2 and Figure 3 , the angle between the first connecting member 31 and the second connecting member 32 can be 90°.

[0069] For example, when the first frame bar 10 and the second frame bar 20 need to be connected to form a bending structure similar to an angle of 120°, the angle between the first connecting member 31 and the second connecting member 32 may be 120°.

[0070] For example, when the first frame bar 10 and the second frame bar 20 need to be connected to form a horizontal structure, the angle between the first connecting member 31 and the second connecting member 32 may be 180°.

[0071] In order to facilitate on-site installation by operators, the first connecting piece 31 in the angle code 30 provided in the embodiment of the present application includes a first connecting sleeve 311 and a first connecting arm 312. The first connecting sleeve 311 is bonded to the inner wall of the end of the first frame strip 10 through the first fiber resin adhesive layer 33. The second matching piece 3121 at the first connecting arm 312 can be snapped into the first matching piece 3113 at the first connecting sleeve 311, thereby realizing the connection between the first frame strip 10 and the second frame strip 20.

[0072] This application does not limit how the second matching piece 3121 is engaged with the first matching piece 3113. In some embodiments, please continue to refer to Figure 2 The first mating member 3113 includes a third opening provided on the sidewall of the first connecting sleeve 311, which communicates with the first channel 3111. The second mating member 3121 includes a boss protruding from the end of the first connecting arm 312. When the first connecting arm 312 is connected to the first connecting sleeve 311, the boss contracts, passes through the first opening into the first channel 3111, and then rebounds to engage with the third opening. The concave-convex fit between the boss and the third opening enables the connection between the first connecting arm 312 and the first connecting sleeve 311.

[0073] The present application does not limit the specific location of the third opening. In some embodiments, the first connecting sleeve 311 may be a through-slot structure or a hollow tubular structure, and the first matching piece 3113 as the third opening may be located at an end of the through-slot structure or the hollow tubular structure away from the first opening 3112. That is, the first opening 3112 and the first matching piece 3113 as the third opening are located at the two ends of the through-slot structure and the hollow tubular structure, respectively.

[0074] Alternatively, in some embodiments, please refer to Figure 2 The first connecting sleeve 311 can be a through-slot structure or a hollow tubular structure, and the first mating piece 3113, which serves as a third opening, can be located axially in the middle of the sidewall of the through-slot structure or the hollow tubular structure. Furthermore, in some embodiments, two opposing third openings are provided on the two opposing sidewalls of the first connecting sleeve 311, and two opposing bosses can be provided on the first connecting arm 312. The two bosses of the first connecting arm 312 can be snapped into the two third openings in a one-to-one correspondence.

[0075] It is understood that the material of the first connecting arm 312 provided in the embodiments of the present application has a certain toughness and can deform, allowing the boss to contract under the action of an external force and rebound after the external force is removed. As an example, the material of the first connecting arm 312 can be metal or resin. For example, the material of the first connecting arm 312 can be aluminum or an aluminum alloy. Alternatively, the material of the first connecting arm 312 can be an engineering resin such as epoxy resin or rubber.

[0076] Furthermore, this application does not limit how the boss at the first connecting arm 312 shrinks. In some embodiments, please continue to refer to Figure 1 The first connecting arm 312 can be configured as a hollowed-out structure. When the first connecting arm 312 is connected to the first connecting sleeve 311, the first connecting arm 312 can deform and contract toward the hollow structure, thereby driving the boss to contract toward the hollow structure. This allows the boss to pass through the first opening 3112 and into the first channel 3111 to the position of the third opening, whereupon the boss rebounds and engages with the third opening.

[0077] Furthermore, in order to facilitate the extension of the boss at the first connecting arm 312 into the first channel 3111 of the first connecting sleeve 311, in some possible embodiments, the end of the first connecting arm 312 away from the second connecting member 32 can be set as a pointed structure, and the connection between the pointed structure and the middle part of the first connecting arm 312 forms a step-shaped boss.

[0078] It will be appreciated that the pointed structure may include a bevel. Alternatively, see Figure 2 The pointed structure can be two connected inclined surfaces. The connection between the side wall of the first connecting arm 312 and the inclined surface protrudes outward to form a step-shaped boss.

[0079] Alternatively, in some embodiments, the second fitting 3121 includes two connecting plates located at the ends of the first connecting arm 312, the two connecting plates being spaced apart relative to each other, a boss being provided on the side of one connecting plate facing away from the other, or bosses being provided on the outsides of both connecting plates. Due to the gap between the two connecting plates, under the action of an external force, the ends of the two connecting plates can be brought closer together, thereby allowing the boss and the two connecting plates to pass through the first opening 3112 and into the first channel 3111. During the movement of the boss and the two connecting plates within the first channel 3111, they are constantly subjected to pressure from the inner wall of the first connecting sleeve 311, causing them to be in a contracted state. When the boss moves to the position of the first fitting 3113, the first fitting 3113 eliminates the pressure on the boss, allowing the two connecting plates to rebound, thereby causing the boss to engage with the first fitting 3113.

[0080] Alternatively, in other embodiments, a boss may be provided at the end of the first connecting arm 312 , and an elastically deformable material may be provided between the boss and the end of the first connecting arm 312 .

[0081] This application does not limit the first mating piece 3113 to an open structure and the second mating piece 3121 to a boss structure. In some embodiments, the first mating piece 3113 may be a retractable boss, and the second mating piece 3121 may be an opening provided on the outer wall of the first connecting arm 312. The retraction of the boss-shaped first mating piece 3113 may be achieved by providing an elastic member, such as a spring, between the boss and the inner wall of the first connecting sleeve 311. To facilitate the movement of the first connecting arm 312 within the first connecting sleeve 311, the boss of the first mating piece 3113 may be wedge-shaped.

[0082] Furthermore, the present application does not limit the specific structure of the second connecting member 32. In some embodiments, please refer to Figure 3 The second connecting member 32 includes a second connecting sleeve 321 and a second connecting arm 322. The second connecting sleeve 321 is bonded to the inner wall of the end of the second frame bar 20 via a second fiber resin adhesive layer 34. A second channel 3211 and a second opening 3212 communicating with the second channel 3211 are provided within the second connecting sleeve 321. A third mating member 3213 is provided at the circumferential edge of the second connecting sleeve 321. The second connecting arm 322 is provided with a fourth mating member 3221, which is configured to penetrate the second channel 3211 through the second opening 3212 and engage with the third mating member 3213.

[0083] The present application does not limit the specific matching form of the third matching piece 3213 and the fourth matching piece 3221 , and corresponding selection can be made with reference to the matching mode of the first matching piece 3113 and the second matching piece 3121 .

[0084] Alternatively, in some embodiments, please refer to Figure 2 The second connecting member 32 includes a second connecting arm 322, which is bonded to the inner wall of the end of the second frame strip 20 via a second fiber resin adhesive layer 34. By directly bonding the second connecting arm 322 of the second connecting member 32 to the inner wall of the second frame strip 20 via the second fiber resin adhesive layer 34, the second connecting sleeve 321 can be omitted, thereby saving costs.

[0085] Furthermore, the present application does not limit the specific shapes of the first connecting sleeve 311 and the second connecting sleeve 321 / the second connecting arm 322, and relevant personnel can make corresponding adjustments based on the shape of the inner cavity of the frame bar.

[0086] In some embodiments, the internal cavity shape of the frame strip can be a quadrangular prism structure, and the outer shape of the first connecting sleeve 311, the second connecting sleeve 321 / the second connecting arm 322 can be a quadrangular prism, so that the above-mentioned quadrangular prism structure can be bonded to the corresponding frame strip using the corresponding fiber resin adhesive layer.

[0087] The first fiber resin adhesive layer 33 and the second fiber resin adhesive layer 34 are used to bond the corresponding frame strips and connectors. The first fiber resin adhesive layer 33 and the second fiber resin adhesive layer 34 are solidified layers formed by mixing the fiber fabric and the resin adhesive. As will be understood, because there are often pores between fibers, the resin adhesive has a certain degree of fluidity before curing. Therefore, the cured resin adhesive will adhere to the pores between the fibers and the surfaces of the fibers in the fiber resin adhesive layer.

[0088] Furthermore, filler particles may be dispersed in the fiber resin adhesive layer.

[0089] In a second aspect, an embodiment of the present application further provides a method for preparing the frame assembly 1, comprising:

[0090] S1. Obtain a first frame strip 10, a second frame strip 20, and an angle bracket 30. The angle bracket 30 comprises a first connecting member 31 and a second connecting member 32 connected at a preset angle. The first connecting member 31 includes a first connecting sleeve 311 and a first connecting arm 312. The first connecting sleeve 311 is internally provided with a first channel 3111 and a first opening 3112 communicating with the first channel 3111. A first mating member 3113 is provided at the circumferential edge of the first connecting sleeve 311. The first connecting arm 312 is provided with a second mating member 3121. The second mating member 3121 can penetrate the first channel 3111 through the first opening 3112 and engage with the first mating member 3113.

[0091] S2. Immersing the fiber fabric in resin glue to form a first adhesive sheet and a second adhesive sheet.

[0092] S3. Before the resin glue is cured, the first adhesive sheet is attached to the outer wall of the first connecting sleeve 311, and the first connecting sleeve 311 with the first adhesive sheet is inserted into the first frame strip 10 to achieve interference fit with the inner wall of the end of the first frame strip 10, and then cured.

[0093] S4. Before the resin glue is cured, the second adhesive sheet is attached to the outer wall of the second connecting member 32, and the second connecting member 32 with the second adhesive sheet is inserted into the second frame strip 20 to interference fit with the inner wall of the end of the second frame strip 20, and then cured.

[0094] In step S1 , the present application does not limit how the first frame strip 10 and the second frame strip 20 are obtained. The first frame strip 10 and the second frame strip 20 are conventional profiles in this field and can be purchased as needed.

[0095] Furthermore, in step S1, the first connecting sleeve 311 of the angle bracket 30 is a conventional sleeve structure and can be manufactured by casting, welding, or injection molding. The first connecting arm 312 and the second connecting member 32 of the angle bracket 30 at a preset angle can also be formed by conventional casting or injection molding.

[0096] In step S2 , the fiber fabric may include fiber felt or fiber cloth.

[0097] As an example, the material of the fiber fabric includes at least one of glass fiber, carbon fiber, basalt fiber or aramid fiber.

[0098] The resin glue is a conventional curable resin glue in the art, including epoxy glue, acrylic glue or polyurethane glue.

[0099] Furthermore, in some embodiments, filler particles may be added to the resin adhesive, with the filler particles accounting for 5% to 20% of the total mass of the resin adhesive.

[0100] Adding 5% to 20% filler particles to the resin glue can not only ensure the bonding strength of the resin glue, but also inhibit the degree of volume shrinkage of the resin glue during the curing process, thereby increasing the contact area between the fiber resin glue layer and the corresponding bonding wall surface and improving the bonding strength.

[0101] As an example, the filler particles may be added in an amount of 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19% or 20%, or in a range between any two thereof.

[0102] Furthermore, in some embodiments, the viscosity of the resin glue may be 1000-1500 Pa·s.

[0103] As an example, the viscosity of the resin glue may be one of 1000 Pa·s, 1100 Pa·s, 1200 Pa·s, 1300 Pa·s, 1400 Pa·s, or 1500 Pa·s, or a range between any two of them.

[0104] Step S2: Dip the fiber fabric into a resin adhesive to form a first adhesive sheet and a second adhesive sheet, respectively. This application does not limit the specific dimensions of the first and second adhesive sheets, as long as they can cover the circumferential outer wall of the corresponding connecting sleeve or connector. The adhesive sheets can fully or partially cover the connecting sleeve or connector, and this application does not impose any restrictions.

[0105] In step S3, before the resin glue is cured, the first adhesive sheet is attached to the outer wall of the first connecting sleeve 311, and the first connecting sleeve 311 with the first adhesive sheet is inserted into the first frame strip 10 to interference fit with the inner wall of the end of the first frame strip 10, and cured.

[0106] It is understood that the first adhesive sheet is formed by impregnating a fiber fabric in a resin liquid of a certain viscosity, and the first adhesive sheet has a certain degree of deformation. The first connecting sleeve 311, to which the first adhesive sheet is attached, is inserted into the first frame strip 10 and forms an interference fit with the inner wall of the end of the first frame strip 10. The interference fit forces the first adhesive sheet, causing the resin glue in the fiber fabric to overflow and fully contact the inner wall of the first frame strip 10 and the outer wall of the first connecting sleeve 311. Furthermore, the fiber fabric can enhance the strength of the resin glue, thereby improving the connection strength.

[0107] According to the preparation method provided in the embodiment of the present application, the adhesive sheet is extruded to apply the adhesive, which can improve the contact degree between the resin adhesive and the wall surface to be bonded.

[0108] It is understood that an interference fit means that the first adhesive sheet has a first thickness, the first connecting sleeve 311 has a second thickness (the second thickness refers to the distance between the first connecting sleeve 311 and the two outer walls), the cavity at the end of the first frame strip 10 has a third thickness (the third thickness refers to the distance between the end of the first frame strip 10 and the two inner walls), and the sum of the first thickness and the second thickness is slightly greater than the third thickness. This application does not limit the specific interference fit dimensions, and relevant personnel can make corresponding selections based on connection requirements.

[0109] In some embodiments, the thickness of the fiber fabric may be 0.1 to 0.5 mm.

[0110] S4. Before the resin glue is cured, the second adhesive sheet is attached to the outer wall of the second connecting member 32, and the second connecting member 32 with the second adhesive sheet is inserted into the second frame strip 20 to interference fit with the inner wall of the end of the second frame strip, and then cured.

[0111] Furthermore, when the second connecting member 32 in the angle code 30 includes a second connecting sleeve 321 and a second connecting arm 322 , the molding method of the second connecting sleeve 321 and the second connecting arm 322 can refer to the molding method of the first connecting sleeve 311 and the first connecting arm 312 .

[0112] The method of attaching the second adhesive sheet to the outer wall of the second connecting member 32 includes: before the resin glue is cured, attaching the second adhesive sheet to the outer wall of the second connecting sleeve 321, extending the second connecting sleeve 321 with the second adhesive sheet into the second frame bar 20 to interference fit with the inner wall of the end of the second frame bar 20, and curing.

[0113] The frame assembly 1 provided in the embodiment of the present application may include multiple groups of first frame strips 10, second frame strips 20 and corner codes 30 manufactured by the above-mentioned preparation method. Users can select the number of frame strips as needed to assemble frame structures of different shapes.

[0114] In some embodiments, the frame assembly 1 includes two sets of first frame strips 10 and second frame strips 20 connected by angle brackets 30, first fiber resin adhesive layer 33 and second fiber resin adhesive layer 34. Figure 4 ( Figure 4 In the figure, the angle code 30, the first fiber resin adhesive layer 33 and the second fiber resin adhesive layer 34 are located inside the frame strips), and the two groups of first frame strips 10 and second frame strips 20 are connected end to end in sequence.

[0115] It is understood that the frame assembly 1 comprises two first frame strips 10, two second frame strips 20, and four corner brackets 30. A first connecting sleeve 311 is bonded to the inner wall at both ends of each first frame strip 10 via a first fiber resin adhesive layer 33. A second connecting member 32 is bonded to the inner wall at both ends of each second frame strip 20 via a second fiber resin adhesive layer 34. The four frame strips are then bonded together end-to-end to form a quadrilateral frame structure.

[0116] The internal chambers of the first and second frame bars 10, 20 are both quadrangular prism structures, with the end faces inclined at a 45° angle. The end of the first connecting arm 312 is provided with a pointed structure consisting of two inclined surfaces. The connection between these two inclined surfaces and the middle portion of the first connecting arm 312 forms a stepped second mating piece 3121. The first connecting sleeve 311 is a hollow quadrangular prism structure, with open first mating pieces 3113 provided on both sidewalls of the middle portion.

[0117] After the first adhesive sheets are attached to the outer walls of the two first connecting sleeves 311 , before the resin glue is cured, the two ends of the first frame strip 10 are respectively pushed in to achieve interference fit with the inner walls of the two ends of the first frame strip 10 and then cured.

[0118] The second connecting member 32 includes a second connecting arm 322. After the outer walls of the two second connecting arms 322 are affixed to the second adhesive sheet, before the resin glue is cured, the two ends of the second frame strip 20 are pushed in respectively to interference fit with the inner walls of the two ends of the second frame strip 20 and then cured.

[0119] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A frame assembly, characterized in that: include: a first frame strip and a second frame strip; An angle bracket, comprising a first connecting member and a second connecting member connected at a preset angle; the first connecting member comprises a first connecting sleeve and a first connecting arm, the first connecting sleeve being bonded to the inner wall of the end portion of the first frame bar via a first fiber resin adhesive layer; the first connecting sleeve is internally provided with a first channel and a first opening communicating with the first channel, a first mating member being provided at a circumferential edge of the first connecting sleeve; the first connecting arm is provided with a second mating member for penetrating the first channel through the first opening and engaging with the first mating member; The second connecting member is bonded to the inner wall of the end portion of the second frame bar through a second fiber resin adhesive layer.

2. The frame assembly according to claim 1, characterized in that: The second connecting member includes a second connecting arm, and the second connecting arm is bonded to the inner wall of the end portion of the second frame bar through the second fiber resin adhesive layer.

3. The frame assembly according to claim 1, wherein: The second connecting member includes a second connecting sleeve and a second connecting arm, and the second connecting sleeve is bonded to the inner wall of the end of the second frame bar through the second fiber resin adhesive layer; a second channel and a second opening connected to the second channel are provided inside the second connecting sleeve, and a third matching member is provided at the circumferential edge of the second connecting sleeve; the second connecting arm is provided with a fourth matching member for penetrating into the second channel through the second opening and engaging with the third matching member.

4. The frame assembly according to any one of claims 1 to 3, characterized in that: The first fiber resin adhesive layer and the second fiber resin adhesive layer each include a fiber fabric and a resin adhesive filled inside the fiber fabric and attached to the surface and solidified; Optionally, the fiber fabric includes fiber felt or fiber cloth; Optionally, the fiber fabric is made of at least one of glass fiber, carbon fiber, basalt fiber or aramid fiber; Optionally, the resin glue includes epoxy glue, acrylic glue or polyurethane glue; Optionally, the first fiber resin adhesive layer and / or the second fiber resin adhesive layer contains filler particles; Optionally, the average particle size of the filler particles is 0.5 to 5 μm; Optionally, the filler particles include at least one of silicon dioxide powder, silicon carbide powder, silicon nitride powder, aluminum oxide powder, zinc oxide powder, titanium dioxide powder, calcium carbonate, and aluminum hydroxide powder.

5. The frame assembly according to claim 1, wherein: The first mating piece includes a third opening provided on the side wall of the first connecting sleeve, and the third opening is connected to the first channel; the second mating piece includes a boss protruding from the end of the first connecting arm; when the first connecting arm is connected to the first connecting sleeve, the boss contracts, and after passing through the first opening into the first channel to the position of the third opening, the boss rebounds and engages with the third opening.

6. The frame assembly according to claim 1, characterized in that: The material of the first frame strip and the second frame strip includes fiber reinforced resin material; Optionally, the fiber-reinforced resin material includes a glass fiber-reinforced resin material or a carbon fiber-reinforced resin material.

7. A method for preparing a frame assembly, characterized in that: include: A first frame strip, a second frame strip, and an angle bracket are obtained. The angle bracket has a first connecting member and a second connecting member connected at a preset angle. The first connecting member includes a first connecting sleeve and a first connecting arm. The first connecting sleeve is internally provided with a first channel and a first opening communicating with the first channel. A first mating member is provided at a circumferential edge of the first connecting sleeve. The first connecting arm is provided with a second mating member. The second mating member can penetrate into the first channel through the first opening and engage with the first mating member. The fiber fabric is impregnated in resin glue to form a first adhesive sheet and a second adhesive sheet respectively; Before the resin glue is cured, the first adhesive sheet is attached to the outer wall of the first connecting sleeve, and the first connecting sleeve with the first adhesive sheet is inserted into the first frame strip to achieve interference fit with the inner wall of the end of the first frame strip, and then cured; Before the resin glue is cured, the second adhesive sheet is attached to the outer wall of the second connecting member, and the second connecting member with the second adhesive sheet is inserted into the second frame strip to interference fit with the inner wall of the end of the second frame strip and cured.

8. The preparation method according to claim 7, characterized in that The second connecting member includes a second connecting sleeve and a second connecting arm. The second connecting sleeve is provided with a second channel and a second opening communicating with the second channel. A third matching member is provided at a circumferential edge of the second connecting sleeve. The second connecting arm is provided with a fourth matching member capable of passing through the second opening into the second channel and engaging with the third matching member. The method of attaching the second adhesive sheet to the outer wall of the second connecting member includes: The second adhesive sheet is attached to the outer wall of the second connecting sleeve, and the second connecting sleeve with the second adhesive sheet is inserted into the second frame strip to achieve interference fit with the inner wall of the end of the second frame strip, and then cured.

9. The preparation method according to claim 7 or 8, characterized in that The fiber fabric includes fiber felt or fiber cloth; Optionally, the fiber fabric is made of at least one of glass fiber, carbon fiber, basalt fiber or aramid fiber; Optionally, the resin glue includes epoxy glue, acrylic glue or polyurethane glue.

10. The preparation method according to claim 9, characterized in that The resin glue further includes filler particles, and the filler particles account for 5% to 20% of the total mass of the resin glue; Optionally, the filler particles account for 10% to 15% of the total mass of the resin glue; Optionally, the viscosity of the resin glue is 1000-1500 Pa·s.

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