Frame connecting structure and frame assembly

Abstract

The utility model provides a frame connecting structure and a frame assembly, and relates to the technical field of connecting pieces. The frame connecting structure comprises a first connecting part and a second connecting part, the second connecting part is connected to the first connecting part and forms an included angle with the first connecting part, and at least one of the first connecting part and the second connecting part is provided with an elastic part and a locking part; wherein one end of the elastic part is provided with an opening end, the other end of the elastic part is provided with a connecting end, and the opening end and the connecting end are connected through a guide inclined plane. The first connecting parts and the second connecting parts can be connected in an inserted mode, the occupied space during stacking is reduced, the situation that the frames on the same layer collide with one another in the transferring process, and consequently surface coating abrasion is caused can be reduced, and the packaging and transporting cost is reduced. Meanwhile, the opening end and the connecting end are connected through the guiding inclined face, the guiding inclined face further plays a guiding role in the inserting process, and the smoothness of the inserting process is improved.

Description

Technical Field

[0001] The utility model generally relates to the technical field of connectors, and in particular to a frame connection structure and a frame assembly. Background Art

[0002] As solar energy utilization is increasingly valued, solar photovoltaic modules are becoming more and more popular. Solar photovoltaic modules include frames and corner brackets, and two adjacent frames are connected by corner brackets. Existing frames and corner brackets are fixedly connected by screws during installation, which is inconvenient to install and disassemble. Utility Model Content

[0003] The utility model provides a frame connection structure and a frame assembly, which are easy to install and disassemble.

[0004] According to the first aspect of the utility model, a frame connection structure is provided, including a first connection part and a second connection part, the second connection part is connected to the first connection part and is arranged at an angle with the first connection part, and at least one of the first connection part and the second connection part is provided with an elastic part and a locking part; wherein one end of the elastic part is provided with an open end, and the other end is provided with a connection end, and the open end and the connection end are connected by a guide slope.

[0005] In some embodiments, the elastic portion includes a groove arranged inside the first connecting portion and / or the second connecting portion, the opening end is the notch of the groove, the connecting end is the bottom of the groove, and the guide slope is the groove wall of the groove; wherein, from the opening end to the connecting end, the groove is a tapered structure.

[0006] In some embodiments, at least one of the ends of the first connection portion and the second connection portion that are away from each other is provided with a guide portion.

[0007] In some embodiments, the guide portion and the locking portion are arranged on both sides of the first connecting portion along the first direction; and / or the guide portion and the locking portion are arranged on both sides of the second connecting portion along the second direction; wherein the first direction is perpendicular to the first connecting portion, and the second direction is perpendicular to the second connecting portion.

[0008] In some embodiments, the side of the guide portion away from the locking portion is tilted downward toward the opening end; and / or the side of the locking portion away from the guide portion is tilted downward toward the opening end.

[0009] In some embodiments, the orthographic projections of the guide portion and the locking portion corresponding to the first connecting portion on the first connecting portion at least partially overlap; and / or the orthographic projections of the guide portion and the locking portion corresponding to the second connecting portion on the second connecting portion at least partially overlap.

[0010] In some embodiments, the width of the open end is B, the height of the locking portion is L7, and the wall thickness of the groove on the side facing the locking portion is L3, wherein B≥L7+L3.

[0011] In some embodiments, the side surface of at least one side of the first connecting portion along the first direction includes a first straight portion and a first inclined portion, the first inclined portion is connected to the first straight portion, the first inclined portion is inclined relative to the first straight portion and in a direction away from the second connecting portion, and the angle between the first inclined portion and the first straight portion is 0.5° to 2°; and / or, the side surface of at least one side of the second connecting portion along the second direction includes a second straight portion and a second inclined portion, the second inclined portion is connected to the second straight portion, the second inclined portion is inclined relative to the second straight portion and in a direction away from the first connecting portion, and the angle between the second inclined portion and the second straight portion is 0.5° to 2°.

[0012] In some embodiments, the elastic portion further includes a through hole disposed inside the first connecting portion and / or the second connecting portion.

[0013] In some embodiments, a reinforcing rib is further disposed inside the first connecting portion and / or the second connecting portion; wherein two oppositely disposed side surfaces of the reinforcing rib respectively form the guiding slope and at least a portion of the inner wall of the through hole.

[0014] In some embodiments, a shock absorbing cavity is disposed inside the first connecting portion and / or the second connecting portion.

[0015] In some embodiments, at least one of the corners of the shock absorbing cavity and the corners of the elastic portion is provided with a rounded corner.

[0016] According to the second aspect of the utility model, an embodiment of the utility model further provides a frame assembly, including a frame and the above-mentioned frame connection structure, the frame is provided with a locking matching part, and the locking part and the locking matching part are detachably connected.

[0017] An embodiment of the utility model has the following advantages or beneficial effects:

[0018] The frame connection structure provided in this embodiment squeezes the elastic part when the frame and the frame connection structure are installed, and the elastic part can be used to deform the first connection part and / or the second connection part, so that the first connection part and / or the second connection part are flexible structures, which is convenient for the connection between the locking part and the locking matching part, and reduces the difficulty of installing and disassembling the frame and the frame connection structure. Compared with the existing connection structure, the first connection part and the second connection part can be plugged into each other, which reduces the space occupied when stacking, and can also reduce the collision of the same layer of frames during transportation, causing surface coating wear, and reducing packaging and transportation costs. At the same time, the opening end and the connection end are connected by a guide bevel, which also plays a guiding role during the plug-in process, thereby improving the smoothness of the plug-in process.

[0019] The frame assembly provided in this embodiment includes a frame and a frame connection structure. The frame can be used to install photovoltaic panel cells. The frame connection structure is used to form a whole frame structure between two adjacent frames. The locking portion of the frame connection structure and the locking matching portion of the frame are detachably connected, which is convenient for installation and removal between two adjacent frames. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to better understand the utility model, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the utility model. In addition, related elements or components may have different settings as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each of the drawings. By describing its example embodiments in detail with reference to the drawings, the above and other features and advantages of the utility model will become more apparent.

[0021] in:

[0022] Figure 1 The structure diagram of the frame connection structure provided by the first embodiment of the present utility model is shown;

[0023] Figure 2 The figure shows the frame connection structure provided by the first embodiment of the present invention in a stacked state. Figure 1 ;

[0024] Figure 3 The figure shows the frame connection structure provided by the first embodiment of the present invention in a stacked state. Figure 2 ;

[0025] Figure 4 Shown is a structural schematic diagram of a frame connection structure provided in Embodiment 2 of the present utility model.

[0026] The reference numerals are described as follows:

[0027] 1. First connecting part; 2. Second connecting part; 3. Elastic part; 4. Locking part; 5. Guide part; 6. Reinforcement rib; 7. Shock-absorbing cavity; 8. Rounded corner;

[0028] 11. a first straight portion; 12. a first inclined portion;

[0029] 31, groove; 311, opening end; 312, connection end; 313, guide slope;

[0030] 32. Through hole. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the example embodiments of the utility model to clearly and completely describe the technical solutions in the example embodiments of the utility model. The example embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the utility model. Therefore, it should be understood that various modifications and changes can be made to the example embodiments without departing from the scope of protection of the utility model.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more; the term "and / or" includes any and all combinations of one or more associated listed items. In particular, reference to "the / the" object or "an" object is also intended to indicate one of a possible plurality of such objects.

[0033] Unless otherwise specified or explained, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0034] Further, in the description of the present invention, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present invention are described at the angles shown in the accompanying drawings and should not be understood as limitations on the exemplary embodiments of the present invention. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to another element (one or more) "upper", "lower", or "inner", "outer", it can not only be directly connected to the other (one or more) elements "upper", "lower", or "inner", "outer", but can also be indirectly connected to the other (one or more) elements "upper", "lower", "inner", "outer" through an intermediate element.

[0035] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0036] Embodiment 1

[0037] like Figure 1 As shown, this embodiment provides a frame assembly, which is suitable for the field of solar photovoltaic assembly technology. The frame assembly includes a frame (not shown in the figure) and a frame connecting structure. The frame connecting structure is provided with a locking part 4, and the frame is provided with a locking matching part. The locking part 4 and the locking matching part are detachably connected.

[0038] The frame assembly provided in this embodiment includes a frame and a frame connection structure. The frame can be used to install photovoltaic panels. The frame connection structure is used to form a whole frame structure between two adjacent frames. The locking portion 4 of the frame connection structure and the locking matching portion of the frame are detachably connected, which is convenient for installation and removal between two adjacent frames.

[0039] Specifically, one of the locking portion 4 and the locking mating portion can be a snap-in block, and the other can be a snap-in hole. For example, a snap-in block is provided in the frame connection structure, and a snap-in hole or a slot is provided in the frame corresponding to the snap-in block. The snap-in block is snapped into the snap-in hole or the slot, which has a simple structure and low production cost.

[0040] In one embodiment, the frame includes a first frame and a second frame, and the first frame and the second frame are arranged at an angle. For example, the angle between the first frame and the second frame can be selected from 60°, 90°, and 120°. When the angle between the first frame and the second frame is 90°, the first frame and the second frame are perpendicular to each other to form an L-shaped structure, and the first frame can be called a horizontal frame, and the second frame can be called a vertical frame. A cavity is provided in the first frame and the second frame, and after the frame connection structure can be inserted into the cavity, the locking portion 4 and the locking matching portion cooperate with each other to achieve the connection between the frame and the frame connection structure.

[0041] Among them, the frame connection structure can also be called a corner code. When the frame and the frame connection structure are installed, since the frame needs to have a certain structural strength, if the frame connection structure is a completely rigid structure, there will be problems of difficulty in installation and disassembly between the frame and the frame connection structure.

[0042] To solve this problem, Figure 1As shown, the frame connection structure provided in this embodiment includes a first connection part 1 and a second connection part 2 , wherein the second connection part 2 is connected to the first connection part 1 and is arranged at an angle to the first connection part 1 .

[0043] The first connection part 1 is connected to the first frame, the second connection part 2 is connected to the second frame, and the first connection part 1 and the second connection part 2 are arranged at an angle. For example, the angle between the first connection part 1 and the second connection part 2 can be 60°, 90°, 120°, etc. When the angle between the first connection part 1 and the second connection part 2 is 90°, the first connection part 1 and the second connection part 2 are perpendicular to each other to form an L-shaped structure, then the first connection part 1 can be called a horizontal side, and the second connection part 2 can be called a vertical side.

[0044] Among them, the first direction is perpendicular to the first connection part 1, and the second direction is perpendicular to the second connection part 2. That is, the angle between the first connection part 1 and the second connection part 2 is complementary to the angle between the first direction and the second direction. If the first connection part 1 and the second connection part 2 are perpendicular to each other, the first direction and the second direction are also perpendicular to each other. The first direction is marked with D1, the second direction is marked with D2, and the third direction is marked with D3. The first direction, the second direction and the third direction are perpendicular to each other.

[0045] It is understandable that the first connection part 1 and the second connection part 2 are an integrally formed structure, which saves the parts assembly process and saves production costs. The first connection part 1 and the second connection part 2 can be directly connected to each other, or the first connection part 1 and the second connection part 2 can be connected through an intermediate connection part.

[0046] When the frame and the frame connecting structure are installed, the elastic part 3 is squeezed and the elastic part 3 can be used to deform the first connecting part 1 and / or the second connecting part 2, so that the first connecting part 1 and / or the second connecting part 2 has a flexible structure, which facilitates the connection between the locking part 4 and the locking matching part, thereby reducing the difficulty of installing and disassembling the frame and the frame connecting structure.

[0047] Among them, Figure 1 As shown, one end of the elastic part 3 is provided with an open end 311 , and the other end is provided with a connecting end 312 , and the open end 311 and the connecting end 312 are connected via a guiding inclined surface 313 .

[0048] Before border transfer, such as Figure 2-Figure 3As shown, first insert the first connection part 1 of one of the frame connection structures into the cavity of the frame, and after respectively plugging the two frame connection structures at both ends of the frame, the two frames are arranged to face each other, and the frame connection structures corresponding to the two frames are arranged to face each other. At this time, the second connection part 2 of one of the frame connection structures and the first connection part 1 of the other frame connection structure are arranged correspondingly, and then part of the second connection part 2 is inserted into the interior of the elastic part 3 through the open end 311 of the first connection part 1 of the other frame connection structure.

[0049] Compared with the existing connection structure, the first connection part 1 and the second connection part 2 can be plugged into each other, which reduces the space occupied when stacking, and can also reduce the collision of the same layer of frames during transportation, causing surface coating wear, and reducing packaging and transportation costs. At the same time, the opening end 311 and the connection end 312 are connected by a guide slope 313, which also plays a guiding role during the plugging process, improving the smoothness of the plugging process.

[0050] In one embodiment, the elastic portion 3 includes a groove 31 arranged inside the first connecting portion 1 and / or the second connecting portion 2, the opening end 311 is the notch of the groove 31, the connecting end 312 is the bottom of the groove 31, and the guiding inclined surface 313 is the groove wall of the groove 31.

[0051] By providing the groove 31 on the first connection part 1 and / or the second connection part 2, the structural strength of the first connection part 1 and / or the second connection part 2 is reduced, which is conducive to elastic deformation, and the process is simple and the production cost is low. The groove 31 can be provided on each side of the first connection part 1 and the second connection part 2, for example, the groove 31 is provided on the end surface of the first connection part 1 and the second connection part 2 away from one end.

[0052] The groove 31 is a tapered structure from the opening end 311 to the connection end 312. In this way, the large end of the tapered structure faces the notch, and the small end faces the bottom of the groove, which plays a guiding and introducing role, facilitating the mutual insertion of the two frame connection structures.

[0053] For example, the cross-section of the tapered structure may be V-shaped, conical, etc. Of course, the V-shape or cone may be an axisymmetric shape or a non-axisymmetric shape. The present embodiment does not limit the specific shape structure of the groove 31, as long as it is a tapered structure, and the specific form may be adjusted according to actual production conditions.

[0054] In one embodiment, Figure 1-Figure 3 As shown, at least one of the ends of the first connection part 1 and the second connection part 2 that are away from each other is provided with a guide part 5. When the frames need to be stacked, the two frame connection structures disposed facing each other are plugged into each other, and the guide part 5 plays a guiding role, reducing the plugging resistance and improving the smoothness of the plugging.

[0055] Among them, the guide part 5 can be arranged at the end of the first connecting part 1 and the second connecting part 2 away from one end of each other, the first connecting part 1 and the corresponding guide part 5 are an integrally formed structure, and the second connecting part 2 and the corresponding guide part 5 are an integrally formed structure.

[0056] In one embodiment, the side of the guide portion 5 away from the locking portion 4 is tilted downward toward the opening end 311 .

[0057] Since the guide portion 5 is located at the end portion where the first connection portion 1 and the second connection portion 2 are away from each other, when the frame connection structure is inserted into the cavity of the frame, the guide portion 5 can first contact the cavity of the frame, and the outer side surface of the guide portion 5 is set to a slope structure, and is inclined downward toward the open end 311. The front end size of the guide portion 5 is smaller than the rear end size and smaller than the cavity size of the frame, which plays a guiding role and facilitates the first connection portion 1 and / or the second connection portion 2 to be inserted into the cavity of the frame.

[0058] In one embodiment, the side of the locking portion 4 away from the guide portion 5 is tilted downward toward the direction of the opening end 311. With this structural design, it is easy to insert the locking portion 4 into the cavity of the frame and play a guiding role, thereby achieving a stable connection between the frame connection structure and the frame. At this time, the locking portion 4 can play a dual role of locking and guiding.

[0059] In one embodiment, Figure 1-Figure 3 As shown, the guide portion 5 and the locking portion 4 are arranged on both sides of the first connecting portion 1 along the first direction; and / or, the guide portion 5 and the locking portion 4 are arranged on both sides of the second connecting portion 2 along the second direction.

[0060] The guiding portion 5 and the locking portion 4 are used to realize double-sided guiding of the first connecting portion 1 and / or the second connecting portion 2, further improving the smoothness of the frame connection structure and the frame during insertion.

[0061] In one embodiment, the orthographic projections of the guide portion 5 and the locking portion 4 corresponding to the first connection portion 1 on the first connection portion 1 at least partially overlap. That is, the guide portion 5 and the locking portion 4 are respectively arranged on both sides of the first connection portion 1 along the first direction, and the guide portion 5 and the locking portion 4 are arranged opposite to each other and located at the end of the first connection portion 1 away from the second connection portion 2, so that the first connection portion 1 is easily inserted into the cavity of the frame.

[0062] In one embodiment, the orthographic projections of the guide portion 5 and the locking portion 4 corresponding to the second connection portion 2 on the second connection portion 2 at least partially overlap. That is, the guide portion 5 and the locking portion 4 are respectively arranged on both sides of the second connection portion 2 along the second direction, and the guide portion 5 and the locking portion 4 are arranged opposite to each other and located at the end of the second connection portion 2 away from the first connection portion 1, so that the second connection portion 2 is conveniently inserted into the cavity of the frame.

[0063] In one embodiment, Figure 2 As shown, the width of the opening end is B, the height of the locking portion 4 along the first direction is L7, and the wall thickness of the groove 31 facing the locking portion 4 is L3, wherein B≥L7+L3.

[0064] In this way, when the frame assemblies need to be stacked, after the first connection parts 1 of the two frame connection structures are respectively plugged into the cavities of the two frames, the second connection parts 2 of the two frame connection structures are both located outside the frames, and the two frame connection structures are arranged facing each other, and the side wall of the second connection part 2 of one frame connection structure facing the locking part 4 and the locking part 4 can be just plugged into the groove 31 of the first connection part 1 in the other frame connection structure, and the side wall of the groove 31 of the other frame connection structure away from the locking part 4 is plugged into the groove 31 of one of the frame connection structures, thereby realizing the mutual plug-in of the two frame connection structures, saving the space required for stacking the frame assemblies along the first direction, and improving space utilization.

[0065] In one embodiment, Figure 1-Figure 3 As shown, the elastic portion 3 further includes a through hole 32 arranged inside the first connecting portion 1 and / or the second connecting portion 2 .

[0066] By providing the through hole 32 inside the first connection part 1 and / or the second connection part 2, when the locking part 4 is squeezed, the inside of the through hole 32 is deformed toward the inside of the through hole 32, which facilitates the mutual engagement between the locking part 4 and the locking matching part. At the same time, the through hole 32 plays a role in reducing weight, which can meet the lightweight requirements of the frame connection structure, and the through hole 32 can also play a certain degree of shock absorption.

[0067] In one embodiment, Figure 1-Figure 3 As shown, reinforcing ribs 6 are further provided inside the first connecting portion 1 and / or the second connecting portion 2 .

[0068] The reinforcing ribs 6 can play a certain supporting role in the deformation of the side walls of the first connecting part 1 and / or the second connecting part 2, and are used to increase the structural strength of each connecting part, avoid the first connecting part 1 and / or the second connecting part 2 from being pressed and damaged during the extrusion process, and assist the side walls to recover from the deformed position to the initial position when the extrusion force disappears or decreases.

[0069] The two oppositely disposed side surfaces of the reinforcing rib 6 respectively form the guiding inclined surface 313 and at least a portion of the inner wall of the through hole 32 .

[0070] In other words, a cavity is opened in the first connecting part 1 and / or the second connecting part 2, and the reinforcing rib 6 is arranged in the cavity. The reinforcing rib 6 serves to separate the internal space of the cavity so as to divide the cavity into two parts: a through hole 32 and a groove 31. At this time, the two side surfaces of the reinforcing rib 6 can respectively serve as the groove wall of the groove 31 and the inner wall of the through hole 32. In this way, not only can the elastic deformation of each connecting part be achieved and the structural strength requirements be met, but also the production cost can be saved.

[0071] It is understandable that after the first connection part 1 and / or the second connection part 2 of the frame connection structure are inserted into the cavity of the frame, the locking part 4 is squeezed and deformed, causing the side wall of the first connection part 1 and / or the second connection part 2 to bend; after the locking part 4 and the locking matching part are engaged with each other, the extrusion force disappears, the reinforcing rib 6 rebounds and supports the side wall where the locking part 4 is located to restore the deformation, so that the locking part 4 is inserted into the locking matching part; when the frame connection structure is applied with a pull-out force, the outward expansion of the reinforcing rib 6 causes the locking part 4 to tightly clamp the locking matching part and restrict the frame connection structure from being pulled out. After the frame and the frame connection structure are connected, the reinforcing rib 6 also plays a role of support along the third direction. Therefore, the reinforcing rib 6 also plays a role of support, elastic recovery and restriction to a certain extent.

[0072] In one embodiment, Figure 1-Figure 3 As shown, the side surface of at least one side of the first connecting portion 1 along the first direction includes a first straight portion 11 and a first inclined portion 12, the first inclined portion 12 is connected to the first straight portion 11, and the first inclined portion 12 is inclined relative to the first straight portion 11 and in a direction away from the second connecting portion 2.

[0073] That is, the side surface of the first connecting portion 1 along the first direction is not a completely straight structure, but is partially inclined. There is a certain angle between the first inclined portion 12 and the first straight portion 11. When the first connecting portion 1 is injection molded, the first straight portion 11 fits against the inner wall of the mold cavity, and there is a certain gap between the first inclined portion 12 and the inner wall of the mold cavity, which facilitates demoulding and improves production efficiency.

[0074] The included angle between the first inclined portion 12 and the first straight portion 11 is 0.5° to 2°.

[0075] In one embodiment, the side surface of at least one side of the second connecting portion 2 along the second direction includes a second straight portion and a second inclined portion, the second inclined portion is connected to the second straight portion, and the second inclined portion is inclined along the second direction and in a direction away from the second straight portion. The second inclined portion is inclined relative to the second straight portion and in a direction away from the first connecting portion.

[0076] That is, the side surface of the second connecting portion 2 along the first direction is not a completely straight structure, but is partially inclined. There is a certain angle between the second inclined portion and the second straight portion. When the second connecting portion 2 is injection molded, the second straight portion fits against the inner wall of the mold cavity, and there is a certain gap between the second inclined portion and the inner wall of the mold cavity, which facilitates demoulding and improves production efficiency.

[0077] Wherein, the included angle between the second inclined portion and the second straight portion is 0.5° to 2°.

[0078] In one embodiment, the first connection part 1 and the second connection part 2 are made of short glass fiber reinforced bio-based polyamide material, which has better corrosion resistance and can be used on the sea surface, water surface, and areas with high corrosion risk, with lower corrosion risk.

[0079] In one embodiment, the continuous fiber volume ratio of the short glass fiber reinforced bio-based polyamide material is 15% vf to 35% vf. The volume ratio refers to the volume of the continuous fiber in the volume of the composite material.

[0080] According to the embodiment of the present invention, the bio-based polyamide in the short glass fiber reinforced bio-based polyamide material is selected from, for example, bio-based polyamide PA56, bio-based polyamide PA510, bio-based polyamide PA511, bio-based polyamide PA512, bio-based polyamide PA513, bio-based polyamide PA514, bio-based polyamide PA515 and bio-based polyamide PA516, bio-based polyamide PA56 / 5T, bio-based polyamide PA510 / 5T, bio-based polyamide PA511 / 5T, bio-based polyamide PA512 / 5T, bio-based polyamide PA513 / 5T, bio-based polyamide PA514 / 5T, bio-based polyamide PA515 / 5T, bio-based polyamide PA516 / 5T, bio-based polyamide PA56 / 5I, commercially available 6638, 6308, 6300, 6290, 6635, 6631, 6632, 6520, 5000, 3600, 3601, 3100, 3102, 3300, 3500, 2260, 2262, 1273, 1251, Any one or a combination of 1320.

[0081] In some specific embodiments, the density of the short glass fiber reinforced bio-based polyamide material is 1.3 g / cm 3 ~1.6g / cm 3 .

[0082] Embodiment 2

[0083] This embodiment is similar to the first embodiment, and the difference lies only in other detailed structures.

[0084] like Figure 4 As shown, a shock absorbing cavity 7 is disposed inside the first connecting portion 1 and / or the second connecting portion 2 provided in this embodiment.

[0085] Specifically, the shock absorbing cavity 7 passes through each connection part, providing shock absorbing space while reducing mass to meet the lightweight requirements. The cross section of the shock absorbing cavity 7 is a quadrilateral, a triangle or a trapezoid, and can be a right triangle or a right trapezoid or a right triangle or a square. Its specific structure can be adjusted according to actual production conditions.

[0086] In one embodiment, at least one of the corners of the damping cavity 7 and the corners of the elastic part 3 is provided with a rounded corner 8. Compared with a right angle, the rounded corner 8 can reduce stress concentration at the corners of the damping cavity 7, the corners of the groove 31, the corners of the through hole 32, etc., improve reliability, and at the same time, avoid the risk of burrs at these locations.

[0087] In one embodiment, the length of the first connection portion 1 along the second direction and the length of the second connection portion 2 along the first direction are L1, 54 mm ≤ L1 ≤ 56 mm, for example, L1 is 54 mm, 55 mm, 56 mm, etc.; the width of the first connection portion 1 along the first direction and the width of the second connection portion 2 along the second direction are L2, 10 mm ≤ L2 ≤ 12 mm, for example, L2 is 10 mm, 11 mm, 12 mm, etc., the wall thickness of the groove 31 is L3, 2 mm ≤ L3 ≤ 4 mm, for example, L3 is 2 mm, 3 mm, 4 mm, etc.; the shock absorbing cavity 7 The height along the second direction is L4, 4mm≤L4≤6mm, for example, L4 is 4mm, 5mm, 6mm, etc.; the length of the locking portion 4 along the first direction is L5, 9mm≤L5≤11mm, for example, L5 is 9mm, 10mm, 11mm, etc.; the length of the straight part of the locking portion 4 along the first direction is L6, 2mm≤L6≤4mm, for example, L6 is 2mm, 3mm, 4mm, etc.; the height of the locking portion 4 along the second direction is L7, 1mm≤L7≤3mm, for example, L7 is 1mm, 2mm, 3mm, etc.

[0088] It should be noted that the frame connection structure shown in the drawings and described in this specification is only an example of the principle of the present invention. It should be clearly understood by those skilled in the art that the principle of the present invention is not limited to any details or any components of the device shown in the drawings or described in the specification.

[0089] It should be understood that the utility model does not limit its application to the detailed structure and arrangement of the components proposed in this specification. The utility model can have other embodiments and can be implemented and executed in a variety of ways. The aforementioned deformation forms and modified forms fall within the scope of the utility model. It should be understood that the utility model disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. All these different combinations constitute multiple alternative aspects of the utility model. The embodiments described in this specification illustrate the best known methods for implementing the utility model and will enable those skilled in the art to utilize the utility model.

[0090] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variation, use, or adaptation of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the art that are not disclosed in the present invention. The specification and example embodiments are to be considered as exemplary only, and the true scope and spirit of the present invention are indicated by the appended claims.

[0091] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of protection of the present invention is limited only by the appended claims.

Claims

1. A frame connection structure, characterized in that: It comprises a first connecting part and a second connecting part, wherein the second connecting part is connected to the first connecting part and is arranged at an angle with the first connecting part, and at least one of the first connecting part and the second connecting part is provided with an elastic part and a locking part; Wherein, one end of the elastic part is provided with an open end, and the other end is provided with a connecting end, and the open end and the connecting end are connected via a guiding inclined surface.

2. The frame connection structure according to claim 1, characterized in that: The elastic part includes a groove arranged inside the first connecting part and / or the second connecting part, the opening end is the notch of the groove, the connecting end is the groove bottom of the groove, and the guiding inclined surface is the groove wall of the groove; Wherein, the groove is a tapered structure from the opening end to the connecting end.

3. The frame connection structure according to claim 2, characterized in that: At least one of the ends of the first connection portion and the second connection portion that are away from each other is provided with a guide portion.

4. The frame connection structure according to claim 3, characterized in that: The guide portion and the locking portion are arranged on both sides of the first connecting portion along the first direction; And / or, the guiding portion and the locking portion are arranged on both sides of the second connecting portion along the second direction; The first direction is perpendicular to the first connection portion, and the second direction is perpendicular to the second connection portion.

5. The frame connection structure according to claim 4, characterized in that: The side of the guide portion away from the locking portion is tilted downward toward the opening end; And / or, the locking portion is arranged to be tilted downwardly toward the opening end on a side away from the guide portion.

6. The frame connection structure according to claim 4, characterized in that: The orthographic projections of the guide portion and the locking portion corresponding to the first connecting portion on the first connecting portion at least partially overlap; And / or, the orthographic projections of the guide portion and the locking portion corresponding to the second connecting portion on the second connecting portion at least partially overlap.

7. The frame connection structure according to claim 4, characterized in that: The width of the opening end is B, the height of the locking portion is L7, and the wall thickness of the groove on the side facing the locking portion is L3, wherein B≥L7+L3.

8. The frame connection structure according to claim 4, characterized in that: The side surface of at least one side of the first connecting portion along the first direction comprises a first straight portion and a first inclined portion, the first inclined portion is connected to the first straight portion, the first inclined portion is inclined relative to the first straight portion and in a direction away from the second connecting portion, and the angle between the first inclined portion and the first straight portion is 0.5° to 2°; And / or, the side surface of at least one side of the second connecting portion along the second direction includes a second straight portion and a second inclined portion, the second inclined portion is connected to the second straight portion, the second inclined portion is inclined relative to the second straight portion and in a direction away from the first connecting portion, and the angle between the second inclined portion and the second straight portion is 0.5° to 2°.

9. The frame connection structure according to claim 2, characterized in that: The elastic portion further includes a through hole arranged inside the first connecting portion and / or the second connecting portion.

10. The frame connection structure according to claim 9, characterized in that: The first connecting portion and / or the second connecting portion are further provided with reinforcing ribs; Wherein, two oppositely disposed side surfaces of the reinforcing rib respectively form the guiding inclined surface and at least a portion of the inner wall of the through hole.

11. The frame connection structure according to any one of claims 1 to 10, characterized in that: A shock absorbing cavity is arranged inside the first connecting part and / or the second connecting part.

12. The frame connection structure according to claim 11, characterized in that: At least one of the corners of the shock absorbing cavity and the corners of the elastic portion is provided with a rounded corner.

13. A frame assembly, characterized in that: It comprises a frame and the frame connection structure according to any one of claims 1 to 12, wherein the frame is provided with a locking matching part, and the locking part and the locking matching part are detachably connected.

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