Car roof cross bar with length convenient to adjust

Abstract

The utility model provides a car roof cross bar convenient for length adjustment, which comprises a main cross beam and clamping devices arranged at two ends of the main cross beam, and fastening cavities arranged along the length direction of the main cross beam are arranged at two ends of the main cross beam; the clamping device comprises a support, a clamping device and a supporting cross beam, the supporting cross beam is arranged on the support and matched in the fastening cavity in a sliding mode, and the supporting cross beam is provided with a supporting part with the upper surface and the lower surface attached to the fastening cavity; the slope positioning blocks and the adjusting bolts are in transmission fit through lead screws and nuts to fasten and loosen the supporting cross beam and the main cross beam, the car roof cross rod enables the clamping device to provide enough supporting force for the main cross beam, and the adjusting bolts are convenient to control and lock. A supporting plane capable of being attached to the top face of the fastening cavity is arranged at the top of the inclined face positioning block, so that the inclined face positioning block can provide more supporting force for the main cross beam.

Description

Technical Field

[0001] The utility model relates to the field of roof cross bars, in particular to a roof cross bar which is easy to adjust in length. Background Art

[0002] Roof rails, also known as roof racks, are mounted on the roof rails or the bare roof surface to facilitate the transport of large items. Roof rails, also known as roof rails or roof side rails, are installed on some cars with roof rails, while others lack them and simply have a bare roof. Roof rails consist of a main crossbar and clamping devices mounted on both ends of the main crossbar. The clamping devices can clamp or secure the roof rails to the bare roof surface or to the door frame of the car's roof, thereby securing the roof rails to the car's roof. However, current roof rails have a limited adjustable length range, and the adjustment structure easily reduces the support surface of the clamping devices on the main crossbar, making them less suitable for cars with different roof widths.

[0003] In view of this, this application is filed. Utility Model Content

[0004] The utility model provides a roof cross bar which is easy to adjust in length, so as to solve at least one of the above technical problems.

[0005] A roof crossbar convenient for length adjustment comprises a main crossbar and clamping devices installed at both ends of the main crossbar. Both ends of the main crossbar are provided with fastening cavities arranged along the length direction thereof.

[0006] The clamping device includes a bracket, a clamping mechanism and a locking mechanism installed on the bracket; the clamping mechanism is used to be fixedly connected and matched with the roof of the car; the locking mechanism includes:

[0007] A supporting beam is arranged on the bracket and slidingly fits in the fastening cavity; and the supporting beam has a supporting portion arranged along the length direction of the main beam, the bottom of the supporting portion is roughly in contact with the bottom surface of the fastening cavity, and the top of the supporting portion is roughly in contact with the top surface of the cavity.

[0008] The fastening assembly is used to fasten and loosen the supporting beam and the main beam.

[0009] Furthermore, the fastening assembly includes a sloped positioning block, a sloped support block and a displacement adjustment assembly. The sloped support block is arranged on the supporting beam, and the sloped positioning block and the sloped support block are slidably matched with each other. The displacement adjustment assembly is used to control the relative position of the sloped positioning block and the sloped support block so that the sloped positioning block moves relative to the sloped support block so that the supporting beam can be tightened in the fastening cavity.

[0010] Furthermore, the displacement adjustment assembly includes an adjustment bolt that is screw-driven with the inclined surface positioning block, and a limiting structure for laterally limiting the position of the bolt head of the adjustment bolt.

[0011] Furthermore, the limiting structure includes a limiting nut fixedly arranged on the adjusting bolt, the bolt head and the limiting nut are respectively located on both sides of the bracket, and the bracket is provided with a vertical through hole for the vertical movement of the bolt.

[0012] Furthermore, an accommodating groove is provided on the supporting beam, the inclined support block is fixedly arranged in the accommodating groove, the top of the inclined positioning block is provided with a supporting plane that can fit with the top surface of the fastening cavity, and the inclined surface of the inclined positioning block faces downward, and the inclined surface of the inclined support block faces upward.

[0013] Furthermore, the fastening assembly also includes a limit block and a limit bolt. The limit block is arranged on the supporting beam, and a threaded through hole is provided on the limit block. A limit groove is provided on the main beam along the length direction of the top surface corresponding to the fastening cavity for the limit bolt to move.

[0014] Furthermore, the inclined surface support block is arranged close to the bracket, the inclined surface positioning block is arranged away from the bracket, and the limiting block is fixedly arranged at a position to prevent the inclined surface positioning block from being separated from the adjusting bolt.

[0015] Furthermore, the ratio of the length of the supporting portion of the supporting beam to the length of the main beam is in the range of 0.05 to 0.15.

[0016] Furthermore, the support portion includes two side walls and a bottom plate of the support beam, and the two side walls of the support beam are fitted and slid with the side walls of the fastening cavity.

[0017] Furthermore, it also includes a shell, which is used to wrap the clamping device, and is provided with a wrapping portion extending toward the main beam, and the wrapping portion is used to be sleeved on the outside of the main beam.

[0018] The roof crossbar of the present invention is provided with fastening cavities at both ends of the main crossbar, and can always support the main crossbar by supporting the crossbar and cooperating with the sliding thereof, so that the spacing adjustment structure will not cause insufficient support force of the clamping device on the main crossbar, that is, the clamping device can provide sufficient support force to the main crossbar.

[0019] Furthermore, the fastening assembly includes an inclined positioning block, an inclined support block and a displacement adjustment assembly. The top of the inclined positioning block is provided with a supporting plane that can fit with the top surface of the fastening cavity, which can facilitate the tightening or loosening of the supporting beam and the main beam, and can use the supporting plane to provide more supporting force to the main beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a roof crossbar according to an embodiment of the present utility model;

[0021] Figure 2 yes Figure 1 A schematic structural diagram of a clamping device and a housing;

[0022] Figure 3 yes Figure 2 A schematic structural diagram of a hidden portion of the shell;

[0023] Figure 4 yes Figure 3 Schematic diagram of the hidden shell and bracket structure;

[0024] Figure 5 yes Figure 1 Schematic diagram of the exploded structure with T-bolts added;

[0025] Figure 6 yes Figure 5 Structural schematic diagram of a long profile;

[0026] Figure 7 yes Figure 5 A schematic diagram of the partially enlarged structure of the part A;

[0027] Figure 8 yes Figure 5 Structural diagram of the main beam;

[0028] Figure 9 yes Figure 8 Schematic diagram of the structure of the first rubber strip.

[0029] Reference numerals:

[0030] 1. Main beam; 11. Fastening cavity; 12. Long profile; 121. First mounting plate; 122. Second mounting plate; 13. First rubber strip; 131. Arc groove; 132. First fixing groove; 14. Second rubber strip; 141. Arc protrusion; 15. Positioning groove; 16. Positioning ridge; 17. Limiting slide; 18. T-shaped slide; 2. Clamping device; 21. Bracket; 22. Clamping mechanism; 23. Locking mechanism; 231. Support beam; 2311. Support part; 2312. Accommodating groove; 232. Inclined positioning block; 233. Inclined support block; 234. Adjusting bolt; 235. Bolt head; 236. Limiting nut; 24. Reinforcement plate; 25. Limiting block; 26. Limiting bolt; 3. Housing; 4. T-bolt. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that terms such as "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0033] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0034] Please refer to Figures 1 to 9 A roof crossbar for easy length adjustment includes a main crossbar 1 and clamping devices 2 mounted at both ends of the main crossbar 1. The main crossbar 1 has fastening cavities 11 defined along its length at both ends. In this embodiment, the fastening cavities 11 at both ends are interconnected to reduce weight. In other embodiments, the fastening cavities 11 at both ends may be disconnected.

[0035] The clamping device 2 includes a bracket 21, a clamping mechanism 22 mounted on the bracket 21, and a locking mechanism 23. The clamping mechanism 22 is configured to securely engage with the vehicle roof. The clamping mechanism 22 can be used to clamp a roof rail, such as a roof luggage bracket 21 described in CN219446872U, or to secure a roof rail to a bare surface, such as a roof crossbar bracket 21 described in CN217705662U, or to secure a door frame, such as a roof crossbar described in CN210454661U, without further limitation.

[0036] The locking mechanism 23 includes:

[0037] The supporting beam 231 is arranged on the bracket 21 and is slidably fitted in the fastening cavity 11; and the supporting beam 231 has a supporting portion 2311 arranged along the length direction of the main beam 1, the bottom of the supporting portion 2311 is roughly in contact with the bottom surface of the fastening cavity 11, and the top of the supporting portion 2311 is roughly in contact with the top surface of the cavity.

[0038] The fastening assembly is used to fasten and loosen the supporting beam 231 and the main beam 1.

[0039] The roof crossbar of the present invention is configured to have fastening cavities 11 at both ends of the main crossbeam 1, and can always support the main crossbeam 1 by cooperating with the supporting crossbeam 231 and the sliding thereof, so that the spacing adjustment structure will not cause insufficient support force of the clamping device 2 on the main crossbeam 1, that is, the clamping device 2 can provide sufficient support force to the main crossbeam 1.

[0040] There are many ways to implement the fastening assembly. For example, by providing a positioning threaded hole on the support beam 231 and a slide groove on the main beam 1, when the support beam 231 and the main beam 1 need to be fastened, a bolt is passed through the slide groove and screwed into the positioning threaded hole. Other structures that can control the fastening and loosening of the support beam 231 and the main beam 1 are also possible.

[0041] In this embodiment, to improve the degree of fastening between the support beam 231 and the main beam 1, the fastening assembly includes an inclined positioning block 232, an inclined support block 233, and a displacement adjustment assembly. The inclined support block 233 is disposed on the support beam 231, and the inclined positioning block 232 and the inclined support block 233 are engaged in an inclined sliding manner. The displacement adjustment assembly is used to control the relative position of the inclined positioning block 232 and the inclined support block 233, so that the inclined positioning block 232 moves relative to the inclined support block 233, thereby tightening the support beam 231 within the fastening cavity 11. The use of the inclined positioning block 232 can effectively increase the area of ​​fastening contact and enhance the fastening force.

[0042] Furthermore, the support beam 231 is provided with a receiving groove 2312, and the inclined support block 233 is fixedly disposed in the receiving groove 2312. The top of the inclined positioning block 232 is provided with a support plane that can be aligned with the top surface of the fastening cavity 11. The inclined surface of the inclined positioning block 232 faces downward, while the inclined surface of the inclined support block 233 faces upward. Thus, the fastening assembly can not only facilitate the fastening or loosening of the support beam 231 and the main beam 1, but also provide more support to the main beam 1 by utilizing the support plane.

[0043] Please refer to Figure 3 and Figure 4 The displacement adjustment assembly includes an adjustment bolt 234 screw-driven with the inclined surface positioning block 232, and a limiting structure for laterally limiting the position of the bolt head 235 of the adjustment bolt 234. The limiting structure can be a fixed block structure, a strip structure, or other shape welded to the bolt rod of the adjustment bolt 23, which can cooperate to limit the lateral movement of the bolt head 235.

[0044] Furthermore, in this embodiment, the limiting structure includes a limiting nut 236 fixedly arranged on the adjusting bolt 234, and the limiting nut 236 is welded to the bolt rod of the adjusting bolt 234. The bolt head 235 and the limiting nut 236 are respectively located on both sides of the bracket 21. The bracket 21 is provided with a vertical through hole for the vertical movement of the bolt. The displacement adjustment component is easy to use and has a good adjustment effect.

[0045] The vertical through hole can be a strip through hole or an elliptical through hole; the adjusting bolt 234 can be rotated in the vertical through hole to complete the screw nut transmission of the inclined support block 233, and can also make the adjusting bolt 234 move up and down with the inclined positioning block 232.

[0046] Please refer to Figure 3 、 Figure 4 and Figure 6 The fastening assembly also includes a limiting block 25 and a limiting bolt 26. The limiting block 25 is arranged on the supporting beam 231, and a threaded through hole is provided on the limiting block 25. A limiting groove 17 for the limiting bolt 26 to move is provided on the top surface of the main beam 1 corresponding to the fastening cavity 11 along its length direction; thereby preventing the locking mechanism 23 from detaching from the main beam 1.

[0047] Among them, the inclined support block 233 is arranged close to the bracket 21, the inclined positioning block 232 is arranged away from the bracket 21, and the limit block 25 is fixedly arranged at a position to prevent the inclined positioning block 232 from detaching from the adjusting bolt 234. This position design can increase the relative sliding distance between the support beam 231 and the support beam 231, and the limit block 25 can also prevent the inclined positioning block 232 from detaching from the adjusting bolt 234.

[0048] The ratio of the length of the support portion 2311 of the support beam 231 to the length of the main crossbeam 1 ranges from 0.05 to 0.15, allowing the roof crossbar of this vehicle to be adjusted over a wide distance. Preferably, the ratio of the length of the support portion 2311 of the support beam 231 to the length of the main crossbeam 1 ranges from 0.08 to 0.12. Furthermore, when the stop bolt 26 is located within the stop slot 17 near one end of the bracket 21, the ratio of the contact length between the support portion 2311 and the fastening cavity 11 to the length of the main crossbeam 1 ranges from 0.03 to 0.13. Preferably, the ratio of the length of the support portion 2311 of the support beam 231 to the length of the main crossbeam 1 ranges from 0.03 to 0.05. That is, when the spacing between the ends of the crossbar is adjusted to its maximum, the support length of the support beam 231 relative to the main crossbeam 1 still accounts for 6% to 10% of the length of the main crossbeam 1, providing sufficient support for the main crossbeam 1.

[0049] According to the specific application scenario, the ratio of the length of the limiting slide groove 17 to the length of the main beam 1 can be set in the range of 0.03 to 0.06, that is, the adjustment distance range of the clamping devices 2 at both ends is 6% to 12% of the length of the main beam 1.

[0050] In this embodiment, the support portion 2311 includes two side walls and a bottom plate of the support beam 231, and the two side walls of the support beam 231 slide in contact with the side walls of the fastening cavity 11, thereby facilitating the provision of a groove in the middle.

[0051] Please refer to Figure 6 To enhance the position-limiting function, the top of the fastening cavity 11 is provided with long grooves corresponding to the two side walls of the support beam 231, and the grooves are adapted to the tops of the two side walls of the support beam 231. To enhance the firmness of the support beam 231, the bracket 21 is also provided with an L-shaped reinforcement plate 24 located at the bottom of the support beam 231. The reinforcement plate 24 and the support beam 231 are fixed to the bracket 21 by welding. In other embodiments, the reinforcement plate 24 and the support beam 231 can be connected by welding and form-fitting.

[0052] Please refer to Figure 1 and Figure 2 , and also includes a shell 3, which is used to wrap the clamping device 2, and is provided with a wrapping portion extending toward the main beam 1, and the wrapping portion is used to be sleeved on the outside of the main beam 1; in addition, the length of the wrapping portion increases or decreases with the length of the limiting slide groove 17 to ensure that no matter which actual use spacing is adjusted to, the main beam is wrapped by the wrapping portion, which is more beautiful and generous.

[0053] Please refer to Figures 5 to 9A shock-absorbing main crossbeam 1 with a T-shaped slide 18, used for a roof cross bar, includes: a long profile 12, a T-shaped slide 18 with a wide bottom and a narrow top opened on the upper surface of the long profile 12 along its length direction, and a first mounting plate 121 and a second mounting plate 122 are respectively provided on both sides of the top of the T-shaped slide 18; the long profile 12 can be an aluminum profile or other profile used for a roof cross bar.

[0054] The first rubber strip 13 and the first rubber strip 13 are installed on the first mounting plate 121, and one side of the first rubber strip 13 extends toward the second mounting plate 122; the second rubber strip 14 and the second rubber strip 14 are installed on the second mounting plate 122, and one side of the second rubber strip 14 extends toward the first mounting plate 121.

[0055] The first rubber strip 13 and the second rubber strip 13 are both made of flexible materials to have an elastic space for the T-shaped slider to slide in the T-shaped sliding groove 18 .

[0056] The shock-absorbing main crossbeam 1 with a T-shaped groove 18 of the present invention is designed to have a rubber strip on the upper surface of the long profile 12 as a first rubber strip 13 and a second rubber strip 14 that are separately installed on both sides of the top of the T-shaped groove 18, so that the T-shaped slider can slide in the T-shaped groove 18. The T-shaped slider can be a T-bolt 4 or other T-shaped sliding structure, which makes it easier to install objects such as side tents or ski fixing brackets on the roof crossbar.

[0057] Furthermore, the adjacent side walls of the first rubber strip 13 and the second rubber strip 14 are in contact with each other, so that in addition to preventing shock and bruises, they can also provide a better noise prevention effect.

[0058] To further enhance the noise reduction effect, an arcuate groove 131 or an arcuate protrusion 141 is provided at the bottom of the first rubber strip 13 extending toward the second rubber strip 14 , and a matching arcuate protrusion 141 or arcuate groove 131 is provided at the bottom of the second rubber strip 14 extending toward the first rubber strip 13 .

[0059] Please refer to Figure 8 and Figure 9 In this embodiment, an arcuate groove 131 extends from the bottom of the first rubber strip 13 toward the second rubber strip 14, and a matching arcuate protrusion 141 extends from the bottom of the second rubber strip 14 toward the first rubber strip 13. The arcuate groove 131 and the arcuate protrusion 141 are located at the bottoms of adjacent sidewalls of the first rubber strip 13 and the second rubber strip 14, respectively. This simplifies the structure and saves rubber material.

[0060] To improve the shockproof effect, the top surface of the first rubber strip 13 and the second rubber strip 14 is higher than the top surface of the long profile 12. The specific height can be adaptively designed according to the application scenario.

[0061] To simplify the installation structure and achieve convenient and stable installation, in this embodiment, the first rubber strip 13 is provided with a first fixing groove 132 that wraps the first mounting plate 121 from the side, and the second rubber strip 14 is provided with a second fixing groove that wraps the second mounting plate 122 from the side.

[0062] To further enhance the firmness, the upper and lower surfaces of the first mounting plate 121 and the second mounting plate 122 are provided with at least one positioning groove 15 or positioning ridge 16 along the length direction, and the first fixing groove 132 or the second fixing groove is correspondingly provided with a positioning ridge 16 or positioning groove 15.

[0063] In this embodiment, the lower surface of the first mounting plate 121 and the second mounting plate 122 is provided with a positioning groove 15 along the length direction, and the upper surface is provided with two positioning grooves 15 along the length direction; the first fixing groove 132 and the second fixing groove are provided with corresponding positioning ridges 16.

[0064] Furthermore, a T-bolt 4 is provided in the main crossbeam 1 , and the T-bolt 4 is slidably installed in the T-slot 18 .

[0065] Please refer to Figure 5 The roof crossbar of this embodiment includes the main crossbeam 1 as described above and the clamping devices 2 installed at both ends of the main crossbeam 1, and also includes a shell 3 for wrapping the clamping device 2 and partially wrapping the two ends of the main crossbeam 1.

[0066] The above are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention fall within the protection scope of the present invention.

Claims

1. A roof crossbar that is easy to adjust in length, comprising a main crossbar and clamping devices installed at both ends of the main crossbar, characterized in that: Both ends of the main crossbeam are provided with fastening cavities arranged along the length direction thereof; The clamping device includes a bracket, a clamping mechanism and a locking mechanism installed on the bracket; The clamping mechanism is used to be fixedly connected and matched with the roof of the car; the locking mechanism includes: a supporting beam, the supporting beam being disposed on the bracket and slidingly engaged in the fastening cavity; the supporting beam having a supporting portion disposed along the length direction of the main beam, the bottom of the supporting portion being substantially in contact with the bottom surface of the fastening cavity, and the top of the supporting portion being substantially in contact with the top surface of the cavity; The fastening assembly is used to fasten and loosen the supporting beam and the main beam.

2. The length-adjustable roof rail according to claim 1, characterized in that: The fastening assembly includes an inclined surface positioning block, an inclined surface supporting block and a displacement adjustment assembly. The inclined surface supporting block is arranged on the supporting beam. The inclined surface positioning block and the inclined surface supporting block are slidably matched with each other at an inclined surface. The displacement adjustment assembly is used to control the relative position of the inclined surface positioning block and the inclined surface supporting block so that the inclined surface positioning block moves relative to the inclined surface supporting block so that the supporting beam can be tightened in the fastening cavity.

3. The length-adjustable roof rail according to claim 2, characterized in that: The displacement adjustment component includes an adjustment bolt which is screw-driven with the inclined surface positioning block, and a limiting structure for laterally limiting the position of the bolt head of the adjustment bolt.

4. The length-adjustable roof rail according to claim 3, characterized in that: The limiting structure includes a limiting nut fixedly arranged on the adjusting bolt, the bolt head and the limiting nut are respectively located on both sides of the bracket, and the bracket is provided with a vertical through hole for the vertical movement of the bolt.

5. The length-adjustable roof rail according to claim 2, characterized in that: The supporting beam is provided with an accommodating groove, the inclined support block is fixedly arranged in the accommodating groove, the top of the inclined positioning block is provided with a supporting plane that can fit with the top surface of the fastening cavity, and the inclined surface of the inclined positioning block faces downward, and the inclined surface of the inclined support block faces upward.

6. The length-adjustable roof rail according to claim 3, characterized in that: The fastening assembly also includes a limit block and a limit bolt. The limit block is arranged on the supporting beam, and a threaded through hole is provided on the limit block. A limit slot for the limit bolt to move is provided on the top surface of the main beam corresponding to the fastening cavity along its length direction.

7. The length-adjustable roof rail according to claim 6, characterized in that: The inclined surface supporting block is arranged close to the bracket, the inclined surface positioning block is arranged away from the bracket, and the limiting block is fixedly arranged at a position to prevent the inclined surface positioning block from being separated from the adjusting bolt.

8. The length-adjustable roof rail according to claim 1, characterized in that: The ratio of the length of the supporting portion of the supporting beam to the length of the main beam is in the range of 0.05 to 0.

15.

9. The length-adjustable roof rail according to claim 8, characterized in that: The support portion includes two side walls of the support beam and a bottom plate, and the two side walls of the support beam are fitted and slid with the side walls of the fastening cavity.

10. The length-adjustable roof rail according to claim 1, characterized in that: It also includes a shell, which is used to wrap the clamping device, and is provided with a wrapping portion extending toward the main beam, and the wrapping portion is used to be sleeved on the outside of the main beam.

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