Connecting structure of plastic section bar and aluminum alloy section bar and composite section bar

Abstract

The invention discloses a connecting structure of a plastic section and an aluminum alloy section and a composite section, the connecting structure is used for connecting an aluminum section body and the plastic section, a positioning edge strip and a composite edge strip are arranged on the side portion of the aluminum section body, a clamping strip is arranged on the side portion of the plastic section, the clamping strip is clamped between the positioning edge strip and the composite edge strip, and the positioning edge strip is connected with the composite edge strip. The positioning edge strip and the composite edge strip form a notch for the clamping strip to be clamped in, a locking protrusion is arranged at the end of the side, close to the positioning edge strip, of the composite edge strip, a metal edge strip in interference fit is fixedly arranged on the side, right opposite to the locking protrusion, of the clamping strip, and a clamping face is arranged on the side, close to the locking protrusion, of the metal edge strip. The locking protrusions can be attached to the rough structures of the metal edgings. According to the plastic profile, the metal edgings in interference fit are arranged on the plastic profile, so that the metal edgings can be pre-processed into required structures, and the shearing force of the profile can be greatly improved by matching the structures with the composite edgings. And the cost and the processing difficulty can be better reduced.

Description

Technical Field

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

[0002] Inserting a plastic profile between two aluminum profiles can provide a good noise and temperature insulation effect, commonly known as "broken bridge aluminum". An important indicator of broken bridge aluminum is the shear strength between different profiles, that is, after the different profiles are connected, it is necessary to ensure that they are in the axial direction ( Figure 1 There should be no relative sliding (in the S direction) and it should be strong and reliable enough.

[0003] The prior art also uses a method of cutting teeth on aluminum profiles, and through the method of extrusion and clamping of the tooth surface with the plastic profile, a stable connection is established between the aluminum profile and the plastic profile. For example, the teeth can be cut in the notch of the heat-insulating aluminum profile by using a special tooth-cutting tool. However, due to the small internal space of the notch, the tooth-cutting process is too difficult. When some manufacturers purchase aluminum profiles for tooth cutting, it is difficult to control the formation of the tooth mouth, resulting in a shallow tooth mouth, which affects the tensile and shear resistance of the combined material. In addition, the connection between the aluminum profile and the plastic profile is itself a connection between metal and plastic, and plastic is easy to deform, and the shape of the aluminum profile tooth is a concave structure, which will further affect the tensile resistance of the combined material ( Figure 1 Q direction) and shear resistance ( Figure 1 S direction) performance.

[0004] To this end, it is necessary to design a connection structure and a composite profile between a plastic profile and an aluminum alloy profile, which can avoid the occurrence of shallow teeth, a concave tooth shape, and a connection between plastic and metal, and improve the tensile and shear resistance of the composite profile after combination. Summary of the invention

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

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

[0007] The connecting structure of the plastic profile and the aluminum alloy profile is used to connect the aluminum profile body and the plastic profile. The side of the aluminum profile body is provided with a positioning edge strip and a composite edge strip. The side of the plastic profile is provided with a clamping strip, which 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 clamped. A locking protrusion is provided at one end of the composite edge strip near the positioning edge strip. A metal edge strip with an interference fit 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 near the locking protrusion, and the clamping surface is provided with a rough structure.

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

[0009] When the clip is completely inserted into the slot, the locking protrusion fits into the rough structure of the metal edge strip.

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

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

[0012] Preferably, in the aforementioned connection structure between the plastic profile and the aluminum alloy profile, the engaging surface is an inclined plane or a stepped structure, and the height of the engaging surface decreases gradually from the aluminum profile body toward the plastic profile.

[0013] Preferably, in the aforementioned connection structure of the plastic profile and the aluminum alloy profile, the clamping strip is connected to the metal edge strip via a groove, the cross section of the groove is an arc, and the cross section of the metal edge strip is an arc with a clamping surface;

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

[0015] Preferably, in the aforementioned connection structure of the plastic profile and the aluminum alloy profile, a first positioning protrusion is provided at the end of the composite edge strip, and the clamping strip cooperates with the first positioning protrusion through the second positioning protrusion;

[0016] When the composite edge strip is clamped to the metal edge 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 detaching from the inside.

[0017] Preferably, in the aforementioned connection structure of the plastic profile and the aluminum alloy profile, the side of the groove is provided with a transition slope and a locking slope in sequence;

[0018] When the composite edge strip is clamped to the clamping surface, the end of the composite edge strip contacts the transition slope and the locking slope in sequence, and when the composite edge strip moves to the junction of the transition slope and the locking slope, the composite edge strip is deformed inwards;

[0019] When the composite edge strip is completely engaged with the metal edge strip, the outer edge of the composite edge strip contacts the locking inclined surface.

[0020] Preferably, in the aforementioned connection structure of the plastic profile and the aluminum alloy profile, a first hook is provided at the end of the composite side strip, and when the composite side strip is completely engaged with the metal side strip, the strip is connected to the first hook via a second hook.

[0021] The composite profile comprises an aluminum profile body and a plastic profile, wherein the aluminum profile body and the plastic profile are connected via any one of the aforementioned connecting structures of the plastic profile and the aluminum alloy profile.

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

[0023] The present invention provides interference-fit metal side strips on the plastic profile, so that the metal side strips can be pre-processed into a required structure, and the structure can be matched with the composite side strips to greatly improve the shear force of the profile, and the cost and processing difficulty can be better reduced.

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

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

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

[0027] Figure 3 is a cross-sectional structural diagram of an inclined plane in the second embodiment of the present invention;

[0028] Figure 4 is a cross-sectional structural diagram of a stepped structure of the clamping surface in the second embodiment of the present invention;

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

[0030] Figure 6 This is a cross-sectional structural diagram of the third embodiment of the present invention (with positioning protrusion 1 and positioning protrusion 2 structures);

[0031] Figure 7 This is the cross-sectional structure of the fourth embodiment of the present invention. Figure 1 ;

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

[0033] Fig. 9 is a cross-sectional structural diagram of Embodiment 5 of the present invention;

[0034] Fig.10 is a state diagram of the composite edge strip in the present invention not in contact with the metal edge strip;

[0035] The meanings of the reference numerals in the figure are as follows: 1-aluminum profile body; 2-positioning edge strip; 3-composite edge strip; 3a-locking protrusion; 4-plastic profile; 4a-clip strip; 4a1-groove; 5-slot; 6-arc-shaped recessed hole; 7-metal edge strip; 7a-tooth mouth; 3b-positioning protrusion one; 4a2-positioning protrusion two; 4a3-transition slope; 4a4-locking slope; 3c-hook one; 4a5-hook two; 7a1-tooth mouth; 7a2-inclined plane; 7a3-step structure. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution 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 an aluminum profile body 1 and a plastic profile 4. Figure 1 and Figure 2 As shown: a positioning edge strip 2 and a composite edge strip 3 are arranged on the side of the aluminum profile body 1, and a clamping strip 4a is arranged on the side of the plastic profile 4, and 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 slot 5 for the clamping strip 4a to be clamped into. A locking protrusion 3a is provided at one end of the composite edge strip 3 close to 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. 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 is provided with a rough structure.

[0040] When the clip strip 4a is not combined with the slot 5, that is, when the aluminum profile body 1 and the plastic profile 4 are in a separated (uncombined) state, the locking protrusion 3a is separated from the metal edge strip 7, that is, not in contact. When the clip strip 4a is completely inserted into the slot 5, the entire composite edge strip 3 is bent toward the metal edge strip 7 by an external force and undergoes plastic deformation, so that the locking protrusion 3a is squeezed and matched with the clamping surface 7a of the metal edge strip 7, thereby realizing the combination of the positioning edge strip 2 and the composite edge strip 3. In this embodiment, the rough structure is the tooth opening 7a1 that is not parallel to the locking protrusion 3a. The optimal state of the direction of the tooth mouth 7a1 is perpendicular to the axis of the composite edge strip 3. In this way, when the locking protrusion 3a is squeezed onto the metal edge strip 7 by external force, the hardness of the metal edge strip 7 is not much different from that of the aluminum profile body 1, which will cause plastic deformation of the two at the extrusion point. The tooth mouth 7a1 will extrude a mark of a certain depth on the locking protrusion 3a, which can significantly increase the shear force between the metal edge strip 7 and the aluminum profile body 1; on the other hand, the locking protrusion 3a can also press a mark on the tooth mouth 7a1, so that the locking protrusion 3a is "recessed" into the inside of the tooth mouth 7a1, thereby improving the tensile strength of the combination between the aluminum profile body 1 and the plastic profile 4.

[0041] Embodiment 2

[0042] like Figure 3 and Figure 4 As shown: The difference between this embodiment and the first embodiment is that the height of the clamping surface from the aluminum profile body 1 to the plastic profile 4 is gradually reduced, that is, Figure 3 In the horizontal direction of the view, the width of the metal edge strip 7 decreases from top to bottom, that is, the engaging surface 7a is an inclined plane 7a2.

[0043] Another case ( Figure 4 ): The clamping surface 7a can also be a stepped structure 7a3, and the clamping surface 7a is a stepped shape whose height gradually decreases from the aluminum profile body 1 to the plastic profile 4.

[0044] In this way, when the locking protrusion 3a is engaged with the engaging surface 7a, the tensile strength between the two is greatly improved.

[0045] Embodiment 3

[0046] like Figure 5 As shown: The difference between this embodiment and the first and second embodiments is that the metal strip 7 in this embodiment is rotatable, the cross section of the groove 4a1 is arc-shaped, and the cross section of the metal strip 7 is an arc with a clamping surface; the clamping surface in this embodiment can also adopt any form of the first and second embodiments. When the locking protrusion 3a is pressed on the clamping surface, the metal strip 7 can rotate (the direction of rotation is shown in FIG. Figure 5and 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, so that after the metal edge strip 7 rotates, the locking protrusion 3a can "hook" the clamping surface by a form-locking manner through the extrusion of the locking protrusion 3a. Furthermore, after the metal edge strip 7 rotates, the reaction force on the locking protrusion 3a will be slightly reduced, but since the two have been squeezed and deformed, the shear force between the two is not greatly affected.

[0047] like Fig.10 As shown, when the composite side strip is not in contact with the metal side strip, the locking protrusion 3a is not in contact with the metal side strip 7. Since the composite side strip 3 is squeezed by external force and undergoes plastic deformation, the locking protrusion 3a is attached to the metal side strip 7. Therefore, the composite side strip 3 undergoes plastic deformation. According to the characteristics of the material itself, the composite side strip 3 will undergo a certain degree of bending and rebound deformation after being squeezed. This is a common property of metal materials. The bending and rebound deformation will cause a certain amount of relaxation between the locking protrusion 3a and the clamping surface 7a, thereby affecting the bonding strength between the two. In order to solve this problem.

[0048] like Figure 6 As shown: In this embodiment, a positioning protrusion 3b is provided at the end of the composite side strip 3, and the clamping strip 4a cooperates with the positioning protrusion 3b through the positioning protrusion 4a2. Specifically, when the composite side strip 3 is clamped to the metal side strip 7, the positioning protrusion 3b is located inside the positioning protrusion 4a2, and the positioning protrusion 4a2 can be used to prevent the positioning protrusion 3b from escaping from the inside. During the bending process of the composite side strip 3, when the positioning protrusion 3b passes through the positioning protrusion 4a2, the two have a certain extrusion force, and the external bending force overcomes the extrusion force, so that the positioning protrusion 3b moves to the inside of the positioning protrusion 4a2. However, when the external bending force disappears, the positioning protrusion 4a2 can prevent the positioning protrusion 3b from escaping from the inside.

[0049] Embodiment 4

[0050] like Figure 7 and Figure 8 As shown: The difference between this embodiment and the previous embodiment is that: the side of the groove 4a1 is provided with a transition slope 4a3 and a locking slope 4a4 in sequence; when the composite side strip 3 is clamped to the clamping surface, the end of the composite side strip 3 contacts the transition slope 4a3 and the locking slope 4a4 in sequence, and when the composite side strip 3 moves to the junction of the transition slope 4a3 and the locking slope 4a4 ( Figure 8 State), the composite edge strip 3 deforms inwards, compared Figure 7 and Figure 8 , Figure 8 The angle B is less than Figure 7 Angle A in.

[0051] In this way, when the composite edge strip 3 is fully engaged with the metal edge strip 7, the outer edge of the composite edge strip 3 contacts the locking bevel 4a4, and the locking bevel 4a4 abuts against the outer edge of the composite edge strip 3, which can avoid bending rebound deformation of the composite edge strip 3 to a certain extent.

[0052] Embodiment 5

[0053] The difference between this embodiment and the previous embodiment is that a hook 3c is provided at the end of the composite edge strip 3. When the composite edge strip 3 is completely engaged with the metal edge strip 7, the clamping strip 4a is connected to the hook 3c via the hook 4a5. This embodiment can also avoid the bending rebound deformation of the composite edge strip 3 to a certain extent.

[0054] The present invention further discloses a composite profile, comprising an aluminum profile body 1 and a plastic profile 4, wherein the aluminum profile body 1 and the plastic profile 4 are connected via a connecting structure of the plastic profile and the aluminum alloy profile in any one of the above embodiments.

[0055] Compared with the prior art, the present invention provides an interference-fit metal edge strip on the plastic profile, so that the metal edge strip can be pre-processed into a required structure, and the structure can be matched with the composite edge strip 3 to greatly improve the shear force of the profile. The cost and processing difficulty can be better reduced.

[0056] The present invention can improve the bending rebound deformation of the composite edge strip 3 after bending to a certain extent through a specific form of structure, and further improve the tensile and shear strength of the profile.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A connecting structure of a plastic profile and an aluminum alloy profile, used to connect 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); 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; a locking protrusion (3a) is provided at one end of the composite edge strip (3) close to 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); 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) 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 the rough structure of the metal edge strip (7).

2. The connection structure of the plastic profile and the aluminum alloy profile according to claim 1, characterized in that: The rough structure is a tooth opening (7a1) that is not parallel to 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 a direction from the aluminum profile body (1) to the plastic profile (4).

5. The connection structure of the plastic profile and the aluminum alloy profile according to claim 1 or 2, characterized in that: The clamping strip (4a) is connected to the metal side 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 side 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).

6. The connection structure of the plastic profile and the 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) through 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.

7. The connection structure of the plastic profile and the aluminum alloy profile according to claim 1 or 2, characterized in that: The side of the groove (4a1) is provided with a transition slope (4a3) and a locking slope (4a4) in sequence; When the composite side strip (3) is engaged with the engaging surface, the end of the composite side strip (3) contacts the transition slope (4a3) and the locking slope (4a4) in sequence, and when the composite side strip (3) moves to the junction of the transition slope (4a3) and the locking slope (4a4), the composite side strip (3) is deformed inwards; When the composite side strip (3) is completely engaged with the metal side strip (7), the outer edge of the composite side strip (3) contacts the locking bevel (4a4).

8. The connection structure of the plastic profile and the 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 clamping hook (4a5).

9. 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 8.

Images