Aluminum alloy car roof cross bar

Abstract

The utility model discloses an aluminum alloy car roof cross bar which comprises a cross bar assembly and a clamp assembly, and the cross bar assembly comprises a cross bar strip. The clamp assembly comprises an upper clamping strip, a lower end cover, an upper end cover and a clamping opening piece, wherein the upper clamping strip is movably installed and connected with the end of the transverse rod strip through a clamping nut plate, the lower end cover and the inner wall face of the upper clamping strip are installed in a buckled and matched mode, the upper end cover and the upper clamping strip are movably installed in a locked mode through a lock cylinder, and the clamping opening piece and the back of the upper clamping strip are installed in a buckled and connected mode. A gap formed between the clamping opening piece and the back face of the upper clamping strip is a clamping opening for clamping and meshing a car roof. According to the aluminum alloy roof cross bar, the cross bar with the adjustable adaptive length and the clamp are combined, the clamp is of a heightening and reinforcing structure, the purposes that the aluminum alloy roof cross bar is adaptive to a vehicle type of a panoramic skyscreen skylight roof and is basically suitable for being installed on vehicle types of different sizes are achieved, and the interference problem of a panoramic skyscreen skylight is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of crossbar structures installed on the longitudinal bars of automobile roofs, and more particularly to an aluminum alloy roof crossbar made of aluminum alloy material with adjustable length and height. Background Technology

[0002] Currently, cars on the market have roof crossbars installed on the roof for the purpose of installing roof racks. That is, the roof rack is installed on the roof crossbars to increase the amount of luggage that can be carried. However, after the traditional roof crossbar structure is installed on the roof, there are often defects such as the gap between the roof crossbar and the roof being too small; and some panoramic sunroof models that are currently popular on the market are difficult to install roof crossbars, or the sunroof cannot be opened after the roof crossbar is installed. In addition, in addition to the above defects, the traditional roof crossbar also has some problems that need to be solved, as follows: (1) When the roof crossbar is installed on the roof of the panoramic sunroof, a clamp structure is often used to fix the roof crossbar to the roof. The problem of the gap between the roof crossbar and the roof being too small is mainly due to the small height of the traditional clamp structure. This makes it impossible for the panoramic sunroof to be opened or causes the clamp to be stuck unsmoothly when opened, that is, the roof crossbar interferes with the panoramic sunroof. (2) Traditional roof crossbars on the market use powder coating or galvanizing to form a protective coating. This protective coating has low hardness. After the roof crossbar is installed on the roof and used, the surface of the protective coating wears a lot and has poor corrosion resistance. It can be used repeatedly to load different items, resulting in poor durability. (3) The clamp structure of traditional roof crossbars is basically made of ordinary carbon structural steel (Q235 in the industry). The yield strength of this Q235 steel is about 235MPa. Its yield value will gradually decrease as the thickness of the steel increases. Therefore, when this steel is used to make the clamp structure, in order to increase the thickness and depth of the clamp structure to achieve a stronger clamping force, the overall clamp structure will lose strength, reduce the overall strength, and reduce the clamping force stability and reliability of the entire clamp structure. (4) In order to increase its structural stability, traditional roof crossbars often have a complex structure design and increased steel wall thickness to ensure its strength and load-bearing capacity. However, such a design will increase its wind resistance during vehicle operation. (5) After the traditional roof crossbar is installed on the roof, its structure is fixed and cannot be adjusted. That is, the length of the roof crossbar and its height relative to the roof cannot be adjusted. This makes it impossible to achieve universal compatibility for different models, and it cannot adjust the length and height according to actual needs. Its application range is relatively narrow and its flexibility is poor.

[0003] Therefore, it is necessary to make certain improvements to the existing roof crossbar structure to address the problems of the existing technology, and to develop a robust and lightweight aluminum alloy roof crossbar structure that can be installed on the longitudinal bars of different vehicle models with an adjustable installation height. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an aluminum alloy roof crossbar. This aluminum alloy roof crossbar is manufactured using a combination of processes including aluminum extrusion, sheet metal stamping, aluminum CNC machining, injection molding, extrusion, electrophoretic surface treatment, passivation surface treatment, and powder coating. Through a reasonable structural design, a set of combined, movable, and adjustable length floating aluminum alloy roof crossbars is established to adapt to the installation of roof longitudinal bars on most vehicle models. This aluminum alloy roof crossbar uses an adjustable length crossbar combined with clips, and the clips adopt a heightened and reinforced structure. The clips are clamped to the roof longitudinal bars for installation, and the roof rack is then connected and installed on the crossbar, realizing the installation of the roof rack. This achieves the purpose of strengthening the load-bearing capacity of the roof rack platform and increasing the distance between the sunroof and the roof rack, thereby avoiding interference problems with the panoramic sunroof.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: an aluminum alloy roof crossbar, including a crossbar assembly and clamp assemblies installed at both ends of the crossbar assembly for clamping and engaging with the roof and arranged symmetrically. The crossbar assembly consists of a hollow crossbar strip and a crossbar rubber strip that is snapped onto the top of the crossbar strip. The clamp assembly includes an upper clamping strip that is movably connected to the end of the crossbar strip through a clamping nut plate, a lower end cover that is snapped onto the inner wall of the upper clamping strip, an upper end cover that is movably locked onto the upper clamping strip through a lock core, and a clamping jaw piece that is snapped onto the back of the upper clamping strip. The clamping jaw piece has a square hole, through which a square nut with a threaded round hole is inserted. A square nut sleeve is fitted on the outside of the square nut, and an internal hexagonal head screw passes through the upper clamping strip and is inserted into the threaded round hole to form a connection. The gap formed between the clamping jaw piece and the back of the upper clamping strip is the clamping jaw for clamping and engaging with the roof.

[0006] Furthermore, the upper clamping bar is composed of a flat plate bar and an outer clamping claw bar that extends outward from the end of the flat plate bar; the flat plate bar is provided with an elongated adjustable installation length screw mounting hole, the clamping nut plate is provided with a screw fixing mounting hole, and the clamping nut plate is also provided with a fixing screw that passes through the screw fixing mounting hole and the adjustable installation length screw mounting hole and forms a fixed installation with the fixing nut in the crossbar bar.

[0007] Furthermore, the outer gripper bar is provided with a snap-fit ​​opening, and the clamping member is provided with an inserting clip that is inserted into the snap-fit ​​opening to form a snap-fit ​​fixation installation.

[0008] Furthermore, the top of the lock cylinder has a recessed slotted opening, and the upper cover and the outer claw strip are respectively provided with a round hole in the upper cover for the lock cylinder to pass through and a transverse elliptical hole for the lock cylinder to pass through.

[0009] Furthermore, the inner wall of the upper clamping strip is also connected to a clamping rubber sleeve, and the clamping piece is inserted into the clamping rubber sleeve to form a clamping and fixing, allowing only the inserting clip head to protrude.

[0010] Furthermore, the crossbar has a crossbar through groove and a crossbar rubber strip groove located above the crossbar through groove. The upper clamping strip and clamping nut plate are inserted into the crossbar groove. The fixing screw passes through the screw hole on the crossbar rubber strip groove and is installed by tightening with the fixing nut through the clamping nut plate. The crossbar rubber strip and the crossbar groove are installed by moving fit.

[0011] Furthermore, the lower end cover has protruding lower end cover clips on both outer sides, and the upper clip has upper clip slots on both outer sides that are fitted together with the lower end cover clips for a tight fit.

[0012] Furthermore, the aforementioned hexagonal head screw passes through a flat washer and a spring washer before mating with a square nut sleeve for installation.

[0013] Furthermore, the surfaces of the crossbar assembly and the clamp assembly are also provided with a passivation coating formed by a passivation surface treatment method, and the hardness of the passivation coating is 600-1000HV.

[0014] Furthermore, the upper clamping bar, clamping nut plate, lower end cover, upper end cover and clamping parts are all made of low alloy high strength structural steel, and the crossbar is made of aluminum-magnesium-silicon alloy aluminum material.

[0015] In summary, this utility model of an aluminum alloy roof crossbar is manufactured using a combination of processes including aluminum extrusion, sheet metal stamping, aluminum CNC machining, injection molding, extrusion, electrophoretic surface treatment, passivation surface treatment, and powder coating. Through a rational structural design, it establishes a modular, movable, and adjustable-length floating aluminum alloy roof crossbar to accommodate the installation of roof longitudinal bars on most vehicle models. This aluminum alloy roof crossbar uses an adjustable-length crossbar combined with clips, and the clips feature a heightened and reinforced structure. The clips clamp the roof longitudinal bars, and the roof rack is then connected and installed on the crossbar, enabling the installation of the roof rack. This achieves the purpose of strengthening the load-bearing capacity of the roof rack platform and increasing the distance between the sunroof and the roof rack, thereby avoiding interference issues with the panoramic sunroof.

[0016] Compared with existing roof crossbars, the aluminum alloy roof crossbar has the following advantages: (1) The aluminum alloy roof crossbar can better adapt to the models of panoramic sunroof roofs and is basically applicable to different sizes of models through the adjustable length structure of the crossbar assembly and the clip assembly. Due to the design of the heightened clip assembly structure, it has a smaller impact on the wind resistance of the vehicle body compared with the existing crossbars on the market.

[0017] (2) The aluminum alloy roof crossbar is fully powder coated and the main components are passivated. Compared with existing crossbars on the market, it still has good corrosion resistance after multiple disassembly and reassembly. Attached Figure Description

[0018] Figure 1 This is an exploded view of the structure of an aluminum alloy roof crossbar according to this utility model;

[0019] Figure 2 This is a top view schematic diagram of the structure of an aluminum alloy roof crossbar according to this utility model;

[0020] Figure 3 yes Figure 2 Schematic diagram of the cross section along the AA direction;

[0021] Figure 4 This is a left-side view of the structure of an aluminum alloy roof crossbar according to this utility model;

[0022] Figure 5 This is an exploded view of the structure of the upper clamping bar, clamping parts, lower end cap, and clamping rubber sleeve.

[0023] Figure 6 This is a schematic diagram of the structural installation of the upper clamping bar, the clamping component, the lower end cap, and the clamping rubber sleeve.

[0024] Figure 7 This is an exploded view of the structure of the upper clamping bar and clamping parts, the lower end cover and clamping rubber sleeve and the crossbar assembly;

[0025] Figure 8 This is a partially exploded view of the installation of the clamp assembly and the crossbar assembly;

[0026] The markings in the attached diagram are as follows: 1. Crossbar; 2. Upper clamping bar; 3. Clamping fitting; 4. Upper end cap; 5. Lower end cap; 6. Square nut; 7. Clamping nut plate; 8. Square nut sleeve; 9. Clamping rubber sleeve; 10. Crossbar rubber strip; 11. Fixing screw; 12. Socket head cap screw; 13. Flat washer; 14. Spring washer; 15. Crossbar assembly; 16. Clamping assembly; 17. Square hole; 18. Thread. 19. Clamping jaw; 20. Adjustable installation length screw mounting hole; 21. Screw fixing mounting hole; 22. Fixing nut; 23. Flat bar; 24. External clamping claw bar; 25. Snap-on clamping jaw; 26. Through-hole clamping head; 27. Locking jaw; 28. Round hole of upper end cover; 29. ​​Horizontal oval hole; 30. Crossbar through groove; 31. Crossbar rubber strip groove; 32. Lower end cover clamping head; 33. Upper clamping bar clamping jaw; 34. Lock cylinder. Detailed Implementation

[0027] Example 1

[0028] The aluminum alloy roof crossbar described in Embodiment 1, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the device includes a crossbar assembly 15 and clamp assemblies 16 installed at both ends of the crossbar assembly for clamping and engaging with the roof of the vehicle and arranged symmetrically. The crossbar assembly consists of a hollow crossbar strip 1 and a crossbar rubber strip 10 that is snapped onto the top of the crossbar strip. The clamp assembly includes an upper clamping strip 2 that is movably connected to the end of the crossbar strip via a clamping nut plate 7, a lower end cover 5 that is snapped onto the inner wall of the upper clamping strip, an upper end cover 4 that is movably locked onto the upper clamping strip via a lock cylinder 34, and a clamping jaw 3 that is snapped onto the back of the upper clamping strip. The clamping jaw 3 has a square hole 17, through which a square nut 6 with a threaded round hole 18 is inserted. A square nut sleeve 8 is fitted on the outside of the square nut. An internal hexagonal head screw 12 passes through the upper clamping strip and is inserted into the threaded round hole to form a connection. The gap between the clamping jaw 3 and the back of the upper clamping strip forms a clamping jaw 19 for clamping and engaging with the roof of the vehicle. This aluminum alloy roof crossbar mainly consists of a crossbar assembly and two clamp assemblies. The clamp assemblies are used to clamp the longitudinal bars on the roof, while the crossbar is used for mounting the roof rack. The upper clamping strip of the clamp assembly forms a clamp with the clamping piece to secure the longitudinal bars on the roof, thus fixing the entire aluminum alloy roof crossbar to the roof. The top end of the upper clamping strip inserts into the end of the crossbar, and the upper clamping strip is installed with the crossbar via a clamping nut plate, allowing for adjustment of the installation distance between the upper clamping strip and the crossbar, thereby adjusting the length of the entire aluminum alloy roof crossbar. This allows for the installation of this aluminum alloy roof crossbar on roof longitudinal bars of different vehicle models, expanding its application range. The outer and inner walls of the upper clamping strip are protected by upper and lower end caps, respectively, to prevent direct clamping of the roof longitudinal bars and avoid scratching the roof crossbar and upper clamping strip. When the clamp formed by the upper clip and the clamping piece holds the roof longitudinal bar, tightening the hexagonal head screw and square nut secures the clamp. After clamping the roof longitudinal bar, the upper cover is then placed on top, and the upper cover and upper clip are locked together using a lock cylinder. The lock cylinder is locked with a key for anti-theft purposes. The size of the clamp can be adjusted by changing the tightening distance between the hexagonal head screw and the square nut to accommodate roof longitudinal bars of different sizes. Furthermore, adjusting the clamp size allows for different clamping heights on the roof longitudinal bar, meaning the clamp can clamp at various heights. This ensures the clamp securely holds the longitudinal bar while allowing for adjustment of the overall installation height of the aluminum alloy roof crossbar. Combined with the higher design of the clamp assembly compared to conventional clamp structures, this avoids interference with the panoramic sunroof. Additionally, two sets of aluminum alloy roof crossbars are required to install one roof rack.

[0029] The aluminum alloy roof crossbar is structurally compatible with the roof of any vehicle model for mounting roof racks or roof bars, and is especially suitable for the rear luggage bar of pickup truck beds with outward-facing longitudinal bars. In addition, the aluminum alloy roof crossbar is lighter and has better load-bearing capacity than the iron or stainless steel roof crossbar (or rear luggage bar).

[0030] In this embodiment 1, the upper clamping strip consists of a flat plate strip 23 and an outer clamping claw strip 24 extending outward from the end of the flat plate strip. The flat plate strip is provided with an elongated adjustable installation length screw mounting hole 20, and the clamping nut plate is provided with a screw fixing mounting hole 21. The clamping nut plate is also provided with a fixing screw 11 that passes through the screw fixing mounting hole and the adjustable installation length screw mounting hole and then forms a fixed installation with the fixing nut 22 in the crossbar strip. When the upper clamping strip is inserted into the crossbar strip, the fixing screw passes through the screw fixing mounting hole and the adjustable installation length screw mounting hole, and finally tightens with the fixing nut to form a fixed connection. The adjustable installation length screw mounting hole allows for adjustment of the length of the upper clamping strip inserted into the crossbar strip, thereby achieving adjustment of the overall length of the aluminum alloy roof crossbar. In addition, the clamping opening formed by the outer clamping claw strip and the clamping piece is relatively higher than that of a regular clamp. This heightening design better avoids obstructing the opening of the panoramic sunroof.

[0031] In this embodiment 1, the outer gripper bar is provided with a snap-fit ​​opening 25, and the gripper is provided with an insertion head 26 that inserts into the snap-fit ​​opening to form a snap-fit ​​fixation. The gripper is clamped and fixed by its own insertion head interlocking with the snap-fit ​​opening of the outer gripper bar. After the interlocking is completed, a square nut is put into a square nut sleeve and inserted into the square hole on the gripper, and an internal hexagonal head screw is inserted into the threaded hole of the square nut.

[0032] In this embodiment 1, the top of the lock cylinder has a recessed slot 27. The upper end cover and the outer clamping claw strip are respectively provided with a round hole 28 for the lock cylinder to pass through and a transverse elliptical hole 29 for the lock cylinder to pass through. The upper end cover is installed on the upper clamping strip, and the lock cylinder passes through the round hole and the transverse elliptical hole of the upper end cover to fix the upper end cover and the outer clamping claw strip in place, thus achieving a locking effect. The lock cylinder is designed with a slot 27 for locking with a key.

[0033] In this embodiment 1, the inner wall of the upper clamping strip is also connected to a clamping sleeve 9. The clamping component is inserted into the clamping sleeve to form a clamping and fixing, with only the inserting head protruding. Most of the structure of the clamping component is inserted into the clamping sleeve and protected by it. The clamping sleeve only allows the inserting head of the clamping component to protrude and be inserted into the upper clamping strip to form a fixed and clamped installation.

[0034] In this embodiment 1, the crossbar has a crossbar through groove 30 and a crossbar rubber strip slot 31 located above the crossbar through groove. The upper clamping strip and the clamping nut plate are inserted into the crossbar slot. The fixing screw passes through the screw hole on the crossbar rubber strip slot and is tightened with the fixing nut through the clamping nut plate. The crossbar rubber strip is movably fitted and locked into the crossbar slot. The upper clamping strip is inserted into the slot of the crossbar through groove, and the clamping nut plate is tightened with the fixing screw. The crossbar rubber strip is then fitted into the crossbar rubber strip slot until the end face is flush, thus completing the installation of the crossbar rubber strip.

[0035] In this embodiment 1, the lower end cover has protruding lower end cover clips 32 on both outer sides, and the upper clamping strip has upper clamping strip slots 33 on both outer sides to form a snap-fit ​​with the lower end cover clips. The lower end cover uses its own lower end cover clips to engage with the upper clamping strip slots of the upper clamping strip, thus realizing the installation of the lower end cover and the upper clamping strip.

[0036] In this embodiment 1, the hexagon socket head cap screw also passes through the flat washer 13 and the spring washer 14 before mating with the square nut. The hexagon socket head cap screw passes through the flat washer and the spring washer and enters the square hole on the clamping member, where it is screwed into the square nut for installation.

[0037] In this embodiment 1, the surfaces of the crossbar assembly and the clamp assembly are further provided with a passivation coating formed by a passivation surface treatment method, and the hardness of the passivation coating is 600-1000 HV. The main components of this aluminum alloy roof crossbar are treated with a passivation surface treatment to form a passivation coating. Compared with powder coating or galvanizing surface treatments on the market, the passivation coating hardness is approximately 600-1000 HV. After assembly, compared with traditional powder coating or galvanizing surface treatments, it can effectively reduce surface coating wear, significantly increase the number of repeated assembly and disassembly cycles, and enhance its corrosion resistance.

[0038] In this embodiment 1, the upper clamping bar, clamping nut plate, lower end cap, upper end cap, and clamping parts are all made of low-alloy high-strength structural steel, while the crossbar is made of aluminum-magnesium-silicon alloy. The main components of the clamp assembly are made of low-alloy high-strength structural steel (Q420), which, compared to the commonly used Q235, compensates for the strength loss due to the increased structural height. The increased forming depth enhances the reliability of the assembly and interlocking structure. The crossbar is made of aluminum-magnesium-silicon alloy (6063 aluminum), with increased structural design and wall thickness to ensure its strength while reducing wind resistance during vehicle operation.

[0039] The aluminum alloy roof crossbar is clean overall, with no obvious dirt, black spots or other appearance defects; the lock cylinder rotates smoothly after installation, without any obvious jamming or shaking; the upper clamp and clamping parts are firmly installed and not easy to loosen.

[0040] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the structure of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An aluminum alloy roof crossbar, comprising a crossbar assembly (15) and clamp assemblies (16) mounted at both ends of the crossbar assembly for clamping and engaging with the roof and arranged symmetrically, characterized in that, The crossbar assembly consists of a hollow crossbar strip (1) and a crossbar rubber strip (10) that is snapped onto the top of the crossbar strip; the clamp assembly includes an upper clamping strip (2) that is movably connected to the end of the crossbar strip via a clamping nut plate (7), a lower end cover (5) that is snapped onto the inner wall of the upper clamping strip, an upper end cover (4) that is movably locked onto the upper clamping strip via a lock core (34), and a clamping piece (3) that is snapped onto the back of the upper clamping strip; the clamping piece has a square hole (17), through which a square nut (6) with a threaded round hole (18) is provided, and a square nut sleeve (8) is fitted on the outside of the square nut, and an internal hexagonal head screw (12) is inserted into the threaded round hole through the upper clamping strip to form a connection; the gap formed between the clamping piece and the back of the upper clamping strip is a clamping mouth (19) for clamping and engaging the roof.

2. The aluminum alloy roof crossbar according to claim 1, characterized in that, The upper clamping bar is composed of a flat plate bar (23) and an outer clamping claw bar (24) that extends outward from the end of the flat plate bar; the flat plate bar is provided with an elongated adjustable installation length screw mounting hole (20), the clamping nut plate is provided with a screw fixing mounting hole (21), and the clamping nut plate is also provided with a fixing screw (11) that passes through the screw fixing mounting hole and the adjustable installation length screw mounting hole and forms a fixed installation with the fixing nut (22) in the crossbar bar.

3. The aluminum alloy roof crossbar according to claim 2, characterized in that, The outer gripper bar is provided with a snap-fit ​​opening (25), and the clamping member is provided with an insert head (26) that is inserted into the snap-fit ​​opening to form a snap-fit ​​fixation installation.

4. The aluminum alloy roof crossbar according to claim 3, characterized in that, The top of the lock cylinder has a recessed slot (27), and the upper end cover and the outer claw strip are respectively provided with a round hole (28) for the lock cylinder to pass through and a transverse elliptical hole (29) for the lock cylinder to pass through.

5. The aluminum alloy roof crossbar according to claim 4, characterized in that, The inner wall of the upper clamping strip is also connected to a clamping sleeve (9), and the clamping piece is inserted into the clamping sleeve to form a clamping and fixing, allowing only the inserting clip head to protrude.

6. The aluminum alloy roof crossbar according to claim 5, characterized in that, The crossbar has a crossbar through groove (30) and a crossbar rubber strip groove (31) located above the crossbar through groove. The upper clamping strip and the clamping nut plate are inserted into the crossbar groove. The fixing screw passes through the screw hole on the crossbar rubber strip groove and is installed by tightening with the fixing nut through the clamping nut plate. The crossbar rubber strip and the crossbar groove are installed by moving fit.

7. The aluminum alloy roof crossbar according to claim 6, characterized in that, The lower end cover has protruding lower end cover clips (32) on both outer sides, and the upper clip has upper clip slots (33) on both outer sides that are fitted together with the lower end cover clips.

8. The aluminum alloy roof crossbar according to claim 7, characterized in that, The internal hexagonal head screw also passes through the flat washer (13) and the spring washer (14) to form a mating fit with the square nut sleeve.

9. The aluminum alloy roof crossbar according to claim 8, characterized in that, The crossbar assembly and clamp assembly are further provided with a passivation coating formed by a passivation surface treatment method, and the hardness of the passivation coating is 600-1000HV.

10. An aluminum alloy roof crossbar according to claim 9, characterized in that, The upper clamping bar, clamping nut plate, lower end cover, upper end cover and clamping parts are all made of low alloy high strength structural steel, and the crossbar is made of aluminum-magnesium-silicon alloy aluminum material.

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