Height self-adjusting mechanism for roof rack of automobile

Abstract

The invention belongs to the technical field of automobile luggage racks, and provides an automobile roof luggage rack height self-adjusting mechanism which comprises a first nut, a second nut, a bolt and an internal damping component, the first nut is installed and connected to the bottom of a luggage rack body, and the second nut is installed in the first nut to be connected and matched with the first nut after being assembled with the internal damping component. A height-adjustable structure is formed among the first nut, the second nut and the bolt, and the luggage rack body is automatically adjusted to be matched with the proper height of the roof through the height-adjustable structure while the bolt is locked. The automobile roof luggage rack height self-adjusting mechanism has the advantages that when the luggage rack is loaded, the proper height is automatically adjusted to be matched with the automobile body metal plate tolerance to complete assembly while the bolts are locked, the installation steps can be simplified, a tolerance adjuster or a welding support does not need to be installed in advance before the luggage rack is installed, and the installation cost is reduced. The assembly line takt of a main engine plant is improved; and the assembly process cost is saved.

Description

Technical Field

[0001] This invention belongs to the field of automotive roof rack technology, specifically relating to a self-adjusting mechanism for the height of an automotive roof rack. Background Technology

[0002] With the increasing number of car models using laser-welded roofs, the disappearance of roof gutters means that roof racks can only be installed on the roof or side panels. The roof and side panels are typically only about 0.7mm thick, insufficient to directly withstand the pressure of the roof rack; the pressure must be transferred to the internal reinforcing sheet metal. To absorb the height tolerances between the roof or side panels and the internal reinforcing sheet metal, ensuring that the roof rack can transfer pressure to the internal reinforcing sheet metal while maintaining a small and uniform gap, tolerance adjustment components must be installed between the roof or side panels and the internal reinforcing sheet metal before installation. Currently, the main solutions for installing roof racks on laser-welded roofs are as follows: Solution 1: ( Option 1: (Pre-installed tolerance adjuster) The tolerance adjuster is placed between the roof sheet metal or side sheet metal and the internal reinforcing sheet metal. A special tool is used to rotate the tolerance adjuster, changing its height until it fills the gap in the height direction between the roof sheet metal and the reinforcing sheet metal. Finally, the roof rack is installed and the bolts are tightened to complete the assembly. This solution is relatively mature, but the final assembly process is more complex, and the tolerance adjuster is expensive due to patent reasons, resulting in a higher overall cost. It is mostly used in mid-to-high-end models. Option 2: (Welded bracket + riveted nut) A bracket is pre-welded inside the roof sheet metal. This bracket is connected to the roof sheet metal or side sheet metal with riveted nuts. Finally, the roof rack is installed and the bolts are tightened to complete the assembly. This solution is relatively mature, but the final assembly process is also more complex, and the overall cost is also higher. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a self-adjusting height mechanism for automobile roof racks that is simple in structure, convenient, improves the speed of assembly lines in OEMs, and saves assembly process costs, in light of the current state of the technology.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a self-adjusting height mechanism for a car roof rack, installed between the roof rack body and the roof, and used to adjust the installation height between the roof rack body and the roof. The mechanism is characterized by including a first nut, a second nut, a bolt, and an internal damping component. The first nut is installed and connected to the bottom of the roof rack body. The second nut is assembled with the internal damping component and then installed inside the first nut for connection and cooperation. The bolt passes through both the first nut and the second nut. An adjustable height structure is formed between the first nut, the second nut, and the bolt. While the bolt is tightened, the adjustable height structure automatically adjusts the roof rack body to a suitable height match with the roof.

[0005] In the above-mentioned self-adjusting height mechanism for a car roof rack, the height-adjustable structure is a double internal thread structure set in the first nut, wherein the first internal thread is located at the top of the first nut and the second internal thread is located at the bottom of the first nut. The bolt has an external thread, and the external thread at the top of the bolt is engaged with the first internal thread. The outer surface of the second nut has an external thread and is engaged with the second internal thread.

[0006] In the above-mentioned self-adjusting height mechanism for a car roof rack, the internal damping component is connected to the second nut by a snap-fit ​​installation, and the internal damping component is installed between the second nut and the bolt.

[0007] In the aforementioned self-adjusting height mechanism for a car roof rack, the internal damping component is divided into four fixed feet, and there are elastic openings between the feet to keep the internal damping component elastic.

[0008] In the aforementioned self-adjusting height mechanism for a car roof rack, the rotational damping control range of the internal damping component and the bolts of the roof rack is 0.3 N / m to 1.0 N / m.

[0009] In the above-mentioned self-adjusting height mechanism for a car roof rack, the mounting point of the second nut and the internal damping component has an upper step and a lower step, and the upper and lower parts of the internal damping component are respectively attached to the upper step and the lower step.

[0010] In the above-mentioned self-adjusting height mechanism for a car roof rack, a connecting component for installing a first nut onto the roof rack body is provided below the roof rack body. The connecting component includes a connecting body, with a connecting clip on each side of the body, and a clamp in the middle of the connecting body for fixing the first nut.

[0011] In the aforementioned self-adjusting height mechanism for a car roof rack, the clamp part has two clamp feet, and there is an elastic notch between the clamp feet.

[0012] In the above-mentioned self-adjusting height mechanism for a car roof rack, a roof sheet metal and a fixing pad are also provided under the roof rack body. The roof sheet metal has sheet metal holes, and the fixing pad has fixing holes. Bolts pass through the fixing holes and sheet metal holes and are locked together.

[0013] Compared with the prior art, the advantage of the present invention is that by installing a nut with double internal threads and a nut with external threads and an internal damping component to form an adjustable height mechanism, the roof rack can be automatically adjusted to match the body sheet metal tolerances when the bolts are tightened to complete the assembly. This self-adjusting height mechanism for car roof racks simplifies the installation process, eliminating the need to pre-install tolerance adjusters or weld brackets before installing the roof rack, thus improving the assembly line speed of the OEM and saving assembly process costs. Attached Figure Description

[0014] Figure 1 This is an exploded view of the height-adjustable mechanism of a car roof rack.

[0015] Figure 2 This is a schematic diagram of the self-adjusting mechanism for the height of a car roof rack during adjustment. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] In the diagram, the following components are included: luggage rack body 100; first nut 200; first internal thread 201; second internal thread 202; second nut 300; nut external thread 301; bolt 400; bolt external thread 401; internal damping component 500; connecting component 600; connecting body 601; connecting clip 602; clamp part 603; fixing clip foot 700; upper step 800; lower step 900; roof sheet metal 1000; fixing gasket 1001.

[0018] like Figure 1 and Figure 2As shown, the self-adjusting height mechanism of this car roof rack is installed between the roof rack body 100 and the roof, mainly for adjusting the installation height between the roof rack body 100 and the roof. It includes a first nut 200, a second nut 300, a bolt 400, and an internal damping component 500. The first nut 200 is installed at the bottom of the roof rack body 100. Specifically, a connecting component 600 is provided below the roof rack body 100 for installing the first nut 200 onto the roof rack body 100. The connecting component 600 includes a connecting body 601, with two... Each side is provided with a connecting clip 602. The middle of the connecting body 601 has a clamp part 603 for fixing the first nut 200. The clamp part 603 has two clamp feet with an elastic notch between them. The existence of the elastic notch makes the clamp part 603 elastic, thereby fixing the entire first nut 200. At the same time, it is also engaged with the luggage rack body 100 by the connecting clips 602 on both sides, thereby fixing the first nut 200 to the luggage rack body 100 and ensuring that the luggage rack maintains the correct position before the bolt 400 is tightened.

[0019] After the second nut 300 is assembled with the internal damping component 500, it is installed inside the first nut 200 and connected to it. The bolt 400 passes through both the first nut 200 and the second nut 300. An adjustable height structure is formed between the first nut 200, the second nut 300, and the bolt 400. When the bolt 400 is tightened, the adjustable height structure automatically adjusts to a suitable height match. The adjustable height structure is a double internal thread structure set in the first nut 200, with the first internal thread 201 located at the top of the first nut 200 and the second internal thread 202 located at the bottom of the first nut 200. The bolt 400 has an external thread 401, and the external thread 401 on the top of the bolt 400 is engaged with the first internal thread 201. The outer surface of the second nut 300 has an external thread 301 and is engaged with the second internal thread 202. Here, this patent uses a specially made first nut 200 with double internal threads and a second nut 300 with external threads and an internal damping component 500 to form an adjustable height mechanism on the luggage rack body 100. This allows the luggage rack to automatically adjust to a suitable height to match the body sheet metal tolerances and complete the assembly when the bolt 400 is tightened during loading.

[0020] For ease of assembly, the internal damping component 500 is snap-fitted to the second nut 300. The internal damping component 500 is installed between the second nut 300 and the bolt 400. The internal damping component 500 consists of four fixing feet 700, with elastic openings between them to maintain the elasticity of the internal damping component 500. These elastic openings allow the fixing feet 700 to be elastic, enabling the internal damping component 500 and the second nut 300 to snap together. To ensure reliable installation, the rotational damping range of the internal damping component 500 and the bolt 400 of the luggage rack is controlled at 0.3N. / m~1.0N / m, here the second nut 300 and the internal damping component 500 are installed with an upper step 800 and a lower step 900. The upper and lower parts of the internal damping component 500 are respectively attached to the upper step 800 and the lower step 900. The upper step 800 and the lower step 900 can prevent the entire internal damping component 500 from coming off after installation. The roof sheet metal 1000 and the fixing gasket 1001 are also provided under the luggage rack body 100. The roof sheet metal 1000 has sheet metal holes, and the fixing gasket 1001 has fixing holes. The bolt 400 passes through the fixing holes and the sheet metal holes and is locked in place.

[0021] In the initial state, the second nut 300 with external threads is screwed into the first nut 200 to the minimum height. Then, during installation, the bolt 400 is operated, and the external thread at the upper end of the bolt 400 engages with the internal thread of the first nut 200 to lock it in place. At the same time, the external thread 301 on the outer surface of the second nut 300 engages with the first internal thread 201 of the first nut 200 to achieve height adjustment. While tightening the bolt 400, the appropriate height is automatically adjusted to match the body sheet metal tolerance to complete the assembly. This self-adjusting height mechanism for automobile roof racks simplifies the installation process, eliminating the need to pre-install tolerance adjusters or weld brackets before installing the roof rack, thus improving the assembly line speed of the OEM and saving assembly process costs.

[0022] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications to the described specific embodiments or adopt similar methods to replace them, but without departing from the scope defined by the spirit of the invention.

Claims

1. A self-adjusting height mechanism for a car roof rack, installed between the roof rack body and the roof of the vehicle, and used to adjust the installation height between the roof rack body and the roof of the vehicle, characterized in that, It includes a first nut, a second nut, a bolt, and an internal damping component. The first nut is installed and connected to the bottom of the luggage rack body. The second nut is assembled with the internal damping component and installed inside the first nut to connect and cooperate with it. The bolt passes through both the first nut and the second nut. The first nut, the second nut, and the bolt form an adjustable height structure. When the bolt is tightened, the adjustable height structure automatically adjusts the luggage rack body to match the appropriate height with the roof of the vehicle.

2. The self-adjusting height mechanism for a car roof rack according to claim 1, characterized in that, The height-adjustable structure is a double internal thread structure set in the first nut, wherein the first internal thread is located at the top of the first nut and the second internal thread is located at the bottom of the first nut. The bolt has an external thread, and the external thread at the top of the bolt is connected to the first internal thread. The outer surface of the second nut has an external thread and is connected to the second internal thread.

3. The self-adjusting height mechanism for a car roof rack according to claim 2, characterized in that, The internal damping component is connected to the second nut by a snap-fit ​​installation, and the internal damping component is installed between the second nut and the bolt.

4. The self-adjusting height mechanism for a car roof rack according to claim 3, characterized in that, The internal damping component is divided into four fixed feet, and there are elastic openings between the feet to keep the internal damping component elastic.

5. The self-adjusting height mechanism for a car roof rack according to claim 4, characterized in that, The rotational damping control range of the internal damping component and the bolts of the luggage rack is 0.3 N / m to 1.0 N / m.

6. The self-adjusting height mechanism for a car roof rack according to claim 1, characterized in that, The mounting point of the second nut and the internal damping component has an upper step and a lower step, and the upper and lower parts of the internal damping component are respectively attached to the upper step and the lower step.

7. The self-adjusting height mechanism for a car roof rack according to claim 6, characterized in that, The luggage rack body is provided with a connecting component for installing the first nut to the luggage rack body. The connecting component includes a connecting body, with a connecting clip on each side of the body and a clamp in the middle of the connecting body to fix the first nut.

8. The self-adjusting height mechanism for a car roof rack according to claim 7, characterized in that, The clamp part has two clamp feet, and there is an elastic notch between the clamp feet.

9. The self-adjusting height mechanism for a car roof rack according to claim 6, characterized in that, The luggage rack is also provided with a roof sheet metal and a fixing pad. The roof sheet metal has sheet metal holes, and the fixing pad has fixing holes. The bolt passes through the fixing holes and the sheet metal holes and is locked in place.

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