Connection Structure between Plastic Profile and Aluminum Alloy Profile and Composite Profile

Abstract

The present invention discloses a connection structure between a plastic profile and an aluminum alloy profile and a composite profile. The connection structure is used to connect the aluminum profile body and the plastic profile. A positioning edge strip and a composite edge strip are provided on the side of the aluminum profile body. A clamping strip is provided on the side of the plastic profile, and the clamping strip is clamped between the positioning edge strip and the composite edge strip. The positioning edge strip and the composite edge strip form a notch for the clamping strip to be inserted into. A locking protrusion is provided at one end of the composite edge strip close to the positioning edge strip. An interference-fit metal edge strip is fixedly provided on the side of the clamping strip facing the locking protrusion. A clamping surface is provided on the side of the metal edge strip close to the locking protrusion, and the locking protrusion can be fitted with the rough structure of the metal edge strip. By providing an interference-fit metal edge strip on the plastic profile, the metal edge strip can be pre-processed into the required structure, and the cooperation of this structure with the composite edge strip can greatly improve the shear force of the profile. Moreover, the cost and processing difficulty can be better reduced.

Description

Technical Field

[0001] The present invention relates to a connection structure between plastic profiles and aluminum alloy profiles and a composite profile, belonging to the technical field of composite profiles. Background Art

[0002] Inserting a plastic profile between two aluminum profiles can play a good role in noise and temperature insulation, commonly known as "broken bridge aluminum". An important index of broken bridge aluminum is the shear strength between different profiles, that is, after the different profiles are clamped, it is necessary to ensure that there is no relative sliding in its axial direction ( Figure 1 the S direction in it), and it should be firm and reliable enough.

[0003] In the prior art, there is also a method of opening teeth on the aluminum profile, and a stable connection is established between the aluminum profile and the plastic profile by the extrusion clamping of the tooth surface and the plastic profile. For example, teeth can be opened in the slot of the heat-insulating aluminum profile, and the slot of the aluminum profile can be opened by a special tooth-opening tool. However, due to the small internal space of the slot, the process of opening teeth is too difficult. When some manufacturers purchase aluminum profiles to open teeth, it is difficult to control the formation of the tooth openings, resulting in shallower tooth openings, which affects the tensile and shear resistance performance after combination. And the connection between the aluminum profile and the plastic profile is itself a connection between metal and plastic, and plastic has the characteristic of being easily deformed, and the shape of the teeth opened on the aluminum profile is a concave structure, which will further affect the tensile force ( Figure 1 the Q direction in it) and shear resistance ( Figure 1 the S direction in it) performance.

[0004] Therefore, it is necessary to design a connection structure between plastic profiles and aluminum alloy profiles and a composite profile, which can avoid the occurrence of shallower tooth openings, the concave structure of the tooth-opening shape, and the connection between plastic and metal, and improve the tensile and shear resistance performance of the composite profile after combination. Summary of the Invention

[0005] In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide a connection structure between plastic profiles and aluminum alloy profiles and a composite profile.

[0006] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0007] Connection structure between plastic profile and aluminum alloy profile, which is used to connect the aluminum alloy profile body and the plastic profile. A positioning side strip and a composite side strip are arranged on the side of the aluminum alloy profile body. A clamping strip is arranged on the side of the plastic profile, and the clamping strip is clamped between the positioning side strip and the composite side strip. The positioning side strip and the composite side strip form a notch for the clamping strip to be inserted into. A locking protrusion is arranged at one end of the composite side strip close to the positioning side strip. An interference-fit metal side strip is fixedly arranged on one side of the clamping strip facing the locking protrusion. A clamping surface is arranged on the side of the metal side strip close to the locking protrusion, and the clamping surface is provided with a rough structure;

[0008] When the clamping strip is not combined with the notch, the locking protrusion is separated from the metal side strip;

[0009] When the clamping strip is completely inserted into the notch, the locking protrusion fits with the rough structure of the metal side strip.

[0010] Preferably, in the above-mentioned connection structure between plastic profile and aluminum alloy profile, the rough structure is a tooth opening not parallel to the direction of the locking protrusion.

[0011] Preferably, in the above-mentioned connection structure between plastic profile and aluminum alloy profile, the height of the clamping surface gradually decreases from the aluminum alloy profile body to the plastic profile.

[0012] Preferably, in the above-mentioned connection structure between plastic profile and aluminum alloy profile, the clamping surface is an inclined plane or a stepped structure, and the height of the clamping surface gradually decreases from the aluminum alloy profile body to the plastic profile.

[0013] Preferably, in the above-mentioned connection structure between plastic profile and aluminum alloy profile, the clamping strip is connected to the metal side strip through a groove, the cross-section of the groove is circular arc-shaped, and the cross-section of the metal side strip is an arc with a clamping surface;

[0014] When the locking protrusion presses on the clamping surface, the metal side strip can rotate; and after the metal side strip rotates, the side of the clamping surface close to the aluminum alloy profile body is higher than the side close to the plastic profile.

[0015] Preferably, in the above-mentioned connection structure between plastic profile and aluminum alloy profile, a first positioning protrusion is arranged at the end of the composite side strip, and the clamping strip is matched with the first positioning protrusion through a second positioning protrusion;

[0016] When the composite side strip is clamped to the metal side strip, the first positioning protrusion is located inside the second positioning protrusion, and the second positioning protrusion can be used to prevent the first positioning protrusion from disengaging from the inside.

[0017] Preferably, in the above-mentioned connection structure between plastic profile and aluminum alloy profile, an inclined surface and a locking inclined surface are sequentially arranged on the side of the groove;

[0018] During the process of the composite edge strip being snap - connected to the snap - connection surface, the end of the composite edge strip contacts the transition inclined surface and the locking inclined surface in sequence. And when the composite edge strip moves to the junction of the transition inclined surface and the locking inclined surface, the composite edge strip deforms inward;

[0019] When the composite edge strip is completely snap - connected to the metal edge strip, the outer edge of the composite edge strip contacts the locking inclined surface.

[0020] Preferably, in the connection structure of the plastic profile and the aluminum alloy profile described above, a first hook is provided at the end of the composite edge strip. When the composite edge strip is completely snap - connected to the metal edge strip, the strip is connected to the first hook through a second hook.

[0021] The composite profile includes an aluminum profile body and a plastic profile, and the aluminum profile body and the plastic profile are connected through the connection structure of the plastic profile and the aluminum alloy profile in any one of the above.

[0022] The beneficial effects achieved by the present invention:

[0023] By providing an interference - fit metal edge strip on the plastic profile in the present invention, the metal edge strip can be pre - processed into the required structure, and the cooperation of this structure with the composite edge strip can greatly improve the shear force of the profile. Moreover, the cost and processing difficulty can be better reduced.

[0024] Through a specific form of structure, the present invention can, to a certain extent, improve the bending springback deformation after the composite edge strip is bent, and further enhance the tensile and shear strength of the profile. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the structural diagram of the composite profile of the present invention;

[0026] Figure 2 is the structural diagram of Embodiment 1 of the present invention;

[0027] Figure 3 is the sectional structural diagram of the inclined plane of the snap - connection surface in Embodiment 2 of the present invention;

[0028] Figure 4 is the sectional structural diagram of the stepped structure of the snap - connection surface in Embodiment 2 of the present invention;

[0029] Figure 5 is the sectional structural diagram of Embodiment 3 of the present invention;

[0030] Figure 6 is the sectional structural diagram of Embodiment 3 of the present invention (with the structure of the first positioning protrusion and the second positioning protrusion);

[0031] Figure 7 is the sectional structure of Embodiment 4 of the present invention Figure 1 ;

[0032] Figure 8It is the cross-sectional structure of the fourth embodiment of the present invention Figure 2 ;

[0033] Figure 9 It is the cross-sectional structure diagram of the fifth embodiment of the present invention;

[0034] Figure 10 It is the state diagram in which the composite edge strip in the present invention does not contact the metal edge strip;

[0035] The meanings of the reference numerals in the figure: 1 - aluminum profile body; 2 - positioning edge strip; 3 - composite edge strip; 3a - locking protrusion; 4 - plastic profile; 4a - clamping strip; 4a1 - groove; 5 - notch; 6 - arc-shaped concave hole; 7 - metal edge strip; 7a - clamping surface; 3b - first positioning protrusion; 4a2 - second positioning protrusion; 4a3 - transition inclined plane; 4a4 - locking inclined plane; 3c - first hook; 4a5 - second hook; 7a1 - tooth opening; 7a2 - inclined plane; 7a3 - stepped structure. Specific embodiments

[0036] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0037] Embodiment 1

[0038] This embodiment discloses a connection structure between a plastic profile and an aluminum alloy profile, which is used to connect the aluminum profile body 1 and the plastic profile 4. As Figure 1 and Figure 2 shown: A positioning edge strip 2 and a composite edge strip 3 are provided on the side of the aluminum profile body 1, and a clamping strip 4a is provided on the side of the plastic profile 4. The clamping strip 4a is clamped between the positioning edge strip 2 and the composite edge strip 3.

[0039] The positioning edge strip 2 and the composite edge strip 3 form a notch 5 for the clamping strip 4a to be inserted. A locking protrusion 3a is provided at one end of the composite edge strip 3 close to the positioning edge strip 2. An interference-fit metal edge strip 7 is fixedly provided on the side of the clamping strip 4a facing the locking protrusion 3a. A clamping surface 7a is provided on the side of the metal edge strip 7 close to the locking protrusion 3a, and the clamping surface 7a has a rough structure.

[0040] When the card strip 4a is not engaged with the notch 5, that is, when the aluminum profile body 1 and the plastic profile 4 are in a separated (unengaged) state, the locking projection 3a is separated from the metal side strip 7, i.e., not in contact. When the card strip 4a is fully inserted into the notch 5, the entire composite side strip 3 is bent by an external force in the direction of the metal side strip 7 and undergoes plastic deformation, causing the locking projection 3a to be in extrusion fit with the engaging surface 7a of the metal side strip 7, thus achieving the combination of the positioning side strip 2 and the composite side strip 3. In this embodiment, the rough structure is the tooth opening 7a1 that is not parallel to the direction of the locking projection 3a. The optimal state of the direction of the tooth opening 7a1 is perpendicular to the axis of the composite side strip 3. In this way, when the locking projection 3a is extruded against the metal side strip 7 by an external force, and the hardness of the metal side strip 7 is not much different from the hardness of the aluminum profile body 1, plastic deformation will occur at the extrusion point between the two, and the tooth opening 7a1 will extrude a trace of a certain depth on the locking projection 3a, which can significantly increase the shear force between the metal side strip 7 and the aluminum profile body 1; on the other hand, the locking projection 3a can also make a mark in the tooth opening 7a1, causing the locking projection 3a to "sink" into the interior of the tooth opening 7a1, enhancing the tensile strength of the combination between the aluminum profile body 1 and the plastic profile 4.

[0041] Embodiment Two

[0042] As Figure 3 and Figure 4 shown: The difference between this embodiment and Embodiment One is that: the height of the engaging surface from the aluminum profile body 1 to the plastic profile 4 decreases successively, that is, Figure 3 in the view, the width of the metal side strip 7 from top to bottom in the horizontal direction decreases successively, that is to say, the engaging surface 7a is an inclined plane 7a2.

[0043] Another situation ( Figure 4 ): The engaging surface 7a can also be a stepped structure 7a3, and the engaging surface 7a is a stepped shape with the height decreasing successively from the aluminum profile body 1 to the plastic profile 4.

[0044] In this way, when the locking projection 3a is engaged with the engaging surface 7a, the improvement in the tensile strength between the two is relatively large.

[0045] Embodiment Three

[0046] As Figure 5 shown: The differences between this embodiment and Embodiment One and Embodiment Two are that: in this embodiment, the metal side strip 7 adopts a rotatable design, the cross-section of the groove 4a1 is arc-shaped, and the cross-section of the metal side strip 7 is an arc with an engaging surface; the engaging surface in this embodiment can also adopt any one of the forms in Embodiment One and Embodiment Two. When the locking projection 3a is extruded against the engaging surface, the metal side strip 7 can rotate (the rotation direction is shown in Figure 5the direction of the arrow in); and after the metal strip 7 rotates, the side of the clamping surface close to the aluminum profile body 1 is higher than the side close to the plastic profile 4. In this way, through the extrusion of the locking projection 3a, after the metal strip 7 rotates, the locking projection 3a can "hook" the clamping surface by means of form locking. Furthermore, after the metal strip 7 rotates, the reaction force on the locking projection 3a will slightly decrease, but since deformation has been extruded between the two, the shear force between the two is not greatly affected.

[0047] As Figure 10 shown, when the composite strip does not contact the metal strip, the locking projection 3a does not contact the metal strip 7. Since the composite strip 3 is plastically deformed after being extruded by an external force, the locking projection 3a is brought into contact with the metal strip 7. Therefore, the composite strip 3 has undergone plastic deformation. According to the characteristics of the material itself, the composite strip 3 will undergo a certain amount of bending and springback deformation after being extruded, which is a common property of metal materials. This bending and springback deformation will cause a certain amount of relaxation between the locking projection 3a and the clamping surface 7a, thereby affecting the bonding strength between the two. To solve this problem.

[0048] As Figure 6 shown: In this embodiment, a first positioning projection 3b is provided at the end of the composite strip 3, and the strip 4a is matched with the first positioning projection 3b through a second positioning projection 4a2. Specifically, when the composite strip 3 is clamped to the metal strip 7, the first positioning projection 3b is located inside the second positioning projection 4a2, and the second positioning projection 4a2 can be used to prevent the first positioning projection 3b from detaching from the inside. During the bending process of the composite strip 3, when the first positioning projection 3b passes through the second positioning projection 4a2, there is a certain extrusion force between the two, and the external bending force overcomes this extrusion force, causing the first positioning projection 3b to move inside the second positioning projection 4a2. However, when the external bending force disappears, the second positioning projection 4a2 can prevent the first positioning projection 3b from detaching from its inside.

[0049] Embodiment 4

[0050] As Figure 7 and Figure 8 shown: The difference between this embodiment and the previous embodiments is that an inclined surface 4a3 and a locking inclined surface 4a4 are sequentially provided on the side of the groove 4a1; during the process of the composite strip 3 being clamped to the clamping surface, the end of the composite strip 3 sequentially contacts the inclined surface 4a3 and the locking inclined surface 4a4, and when the composite strip 3 moves to the junction of the inclined surface 4a3 and the locking inclined surface 4a4 ( Figure 8 state), the composite strip 3 deforms inward, and comparing Figure 7 and Figure 8 , Figure 8 the angle B in is smaller than Figure 7 the angle A in.

[0051] In this way, when the composite side strip 3 is fully snapped onto the metal side strip 7, the outer edge of the composite side strip 3 contacts the locking inclined surface 4a4, and the locking inclined surface 4a4 abuts against the outer edge of the composite side strip 3, which can avoid the bending and springback deformation of the composite side strip 3 to a certain extent.

[0052] Embodiment 5

[0053] The difference between this embodiment and the foregoing embodiments is that a first hook 3c is provided at the end of the composite side strip 3. When the composite side strip 3 is fully snapped onto the metal side strip 7, the strip 4a is connected to the first hook 3c through a second hook 4a5. This embodiment can also avoid the bending and springback deformation of the composite side strip 3 to a certain extent.

[0054] The present invention also discloses a composite profile, which includes an aluminum profile body 1 and a plastic profile 4. The aluminum profile body 1 and the plastic profile 4 are connected through the connection structure between the plastic profile and the aluminum alloy profile in any of the above embodiments.

[0055] Compared with the prior art, by providing an interference-fit metal side strip on the plastic profile, the metal side strip can be pre-processed into a required structure, and the cooperation of this structure with the composite side strip 3 can greatly improve the shear force of the profile. Moreover, the cost and processing difficulty can be better reduced.

[0056] Through a specific form of structure, the present invention can improve the bending and springback deformation of the composite side strip 3 after bending to a certain extent, and further enhance the tensile and shear strength of the profile.

[0057] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A connecting structure of a plastic profile and an aluminum alloy profile, used for connecting an aluminum profile body (1) and a plastic profile (4), characterized in that: The side of the aluminum profile body (1) is provided with a positioning edge strip (2) and a composite edge strip (3), and the side of the plastic profile (4) is provided with a clamping strip (4a), the clamping strip (4a) is clamped between the positioning edge strip (2) and the composite edge strip (3), the positioning edge strip (2) and the composite edge strip (3) form a notch (5) for the clamping strip (4a) to be clamped, the composite edge strip (3) is provided with a locking protrusion (3a) at one end near the positioning edge strip (2), a metal edge strip (7) with an interference fit is fixedly provided on the side of the clamping strip (4a) facing the locking protrusion (3a), the metal edge strip (7) is provided with a clamping surface (7a) on the side near the locking protrusion (3a), and the clamping surface (7a) is provided with a rough structure; When the clamping strip (4a) is not engaged with the notch (5), the locking protrusion (3a) is separated from the metal edge strip (7); When the clamping strip (4a) is completely inserted into the notch (5), the locking protrusion (3a) fits into the rough structure of the metal edge strip (7); The clamping strip (4a) is connected to the metal edge strip (7) via a groove (4a1), the cross section of the groove (4a1) is in the shape of an arc, and the cross section of the metal edge strip (7) is in the shape of an arc with a clamping surface; When the locking protrusion (3a) is pressed against the clamping surface, the metal edge strip (7) can rotate; and after the metal edge strip (7) rotates, the side of the clamping surface close to the aluminum profile body (1) is higher than the side close to the plastic profile (4).

2. The connection structure of plastic profile and aluminum alloy profile according to claim 1, characterized in that: The rough structure is a tooth opening (7a1) that is not parallel to the direction of the locking protrusion (3a).

3. The connection structure of the plastic profile and the aluminum alloy profile according to claim 1 or 2, characterized in that: The height of the clamping surface decreases gradually from the aluminum profile body (1) to the plastic profile (4).

4. The connection structure of the plastic profile and the aluminum alloy profile according to claim 3, characterized in that: The clamping surface (7a) is an inclined plane (7a2) or a stepped structure (7a3), and the height of the clamping surface (7a) decreases in sequence from the aluminum profile body (1) to the plastic profile (4).

5. The connection structure of plastic profile and aluminum alloy profile according to claim 1 or 2, characterized in that: The end of the composite edge strip (3) is provided with a first positioning protrusion (3b), and the clamping strip (4a) cooperates with the first positioning protrusion (3b) via the second positioning protrusion (4a2); When the composite edge strip (3) is clamped to the metal edge strip (7), the first positioning protrusion (3b) is located inside the second positioning protrusion (4a2), and the second positioning protrusion (4a2) can be used to prevent the first positioning protrusion (3b) from detaching from the inside.

6. The connection structure of plastic profile and aluminum alloy profile according to claim 1, characterized in that: A first hook (3c) is provided at the end of the composite side strip (3). When the composite side strip (3) is completely engaged with the metal side strip (7), the clamping strip (4a) is connected to the first hook (3c) via the second hook (4a5).

7. A composite profile comprising an aluminum profile body (1) and a plastic profile (4), characterized in that: The aluminum profile body (1) and the plastic profile (4) are connected via the connecting structure of the plastic profile and the aluminum alloy profile according to any one of claims 1 to 6.

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