Structure for enhancing fastening torque of bolt in cavity area of aluminum profile

Abstract

The utility model discloses a structure for enhancing bolt fastening torque in an aluminum profile cavity area, which belongs to the technical field of motor homes and comprises an aluminum profile body, a cavity body is integrally formed in the aluminum profile body, a fixed-height rivet nut is arranged in the cavity body, and an outer hexagon bolt is arranged above the fixed-height rivet nut. The fixed-height rivet nuts are embedded in the cavity body, the fixed-height rivet nuts and the aluminum profile body are integrated through expansion of the fixed-height rivet nuts, and then the aluminum profile body and the lifting mechanism fixing plate are fixed through threaded connection with the welding nuts. Meanwhile, various factors possibly causing looseness of the outer hexagon bolt can be more effectively dealt with through the arranged elastic gasket and the arranged flat gasket, the reliability of the connecting position in the long-term use process is greatly improved, and the problems that the fastening point of the aluminum profile body deforms and the fixing torsion of the outer hexagon bolt is insufficient can be effectively solved; and the manufacturing cost of common pre-burying and the risk that the weight exceeds the load of the lifting mechanism are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of recreational vehicles, in particular to a structure for enhancing the tightening torque of bolts in a cavity area of ​​an aluminum profile. Background Art

[0002] With the improvement of people's living standards and the pursuit of travel experience, the RV market is expanding. As a device that integrates living and transportation, the safety and stability of the RV structure are of vital importance. Aluminum profiles are widely used in RV manufacturing due to their advantages such as light weight, high strength and corrosion resistance. For example, many parts of RV body frames and interior partitions are made of aluminum profiles.

[0003] The current lifting roof model aluminum profile is connected to the lifting mechanism, and the solution adopted is to plug a wooden block into the aluminum profile cavity. The existing aluminum profile cavity height is limited and the aluminum profile is long, so the wooden block cannot be positioned inside the aluminum profile, making actual operation difficult and the operating efficiency low. At the same time, the existing wooden block is not strong enough to effectively play a supporting role, and the deformation of the aluminum profile cannot be effectively controlled. Utility Model Content

[0004] Purpose of the utility model: The purpose of the utility model is to provide a solution to the risk of uncontrollable safety problems caused by insufficient force in fixing the bolts of aluminum profiles, resulting in enlarged holes, leakage and falling off; another purpose of the utility model is to provide a solution to the problem of deformation of aluminum profiles.

[0005] Technical solution: A structure for enhancing the bolt tightening torque in the cavity area of ​​an aluminum profile, comprising an aluminum profile body, a cavity body integrally formed inside the aluminum profile body, a fixed height rivet nut arranged inside the cavity body, an external hexagonal bolt arranged above the fixed height rivet nut, the bottom end of the external hexagonal bolt passes through the interior of the fixed height rivet nut and extends to the bottom of the aluminum profile body, and is threadedly connected to a welding nut, and the outer side wall of the welding nut is fixedly connected to a lifting mechanism fixing plate.

[0006] Furthermore, a spring washer and a flat washer are sequentially arranged between the external hexagonal bolt and the upper portion of the fixed height rivet nut.

[0007] Beneficial effects:

[0008] By pre-embedding the fixed height rivet nut inside the cavity body, the fixed height rivet nut expands and becomes one with the aluminum profile body, and then fixes the aluminum profile body and the lifting mechanism fixing plate through a threaded connection with the welding nut. At the same time, the spring washer and flat washer provided can more effectively deal with various factors that may cause the loosening of the hexagonal bolts, greatly improving the reliability of the connection during long-term use, and effectively solving the problems of deformation of the fastening point of the aluminum profile body and insufficient fixing torque of the hexagonal bolts, reducing the manufacturing cost of ordinary pre-embedded parts and the risk of the weight exceeding the load of the lifting mechanism, reducing the manufacturing cost of ordinary pre-embedded parts, enhancing the fixing torque of the fastening points, improving working efficiency, and greatly reducing after-sales maintenance or repair costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0010] In the figure: 1. Aluminum profile body; 2. Cavity body; 3. Fixed height rivet nut; 4. Hexagonal bolt; 5. Welding nut; 6. Lifting mechanism fixing plate; 7. Spring washer; 8. Flat washer. DETAILED DESCRIPTION

[0011] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0012] Example 1

[0013] like Figure 1 As shown, a structure for enhancing the bolt tightening torque in the cavity area of ​​an aluminum profile is provided, comprising an aluminum profile body 1, a cavity body 2 integrally formed inside the aluminum profile body 1, a fixed height rivet nut 3 provided inside the cavity body 2, an external hexagonal bolt 4 provided above the fixed height rivet nut 3, the bottom end of the external hexagonal bolt 4 passes through the interior of the fixed height rivet nut 3 and extends to the bottom of the aluminum profile body 1, and is threadedly connected to a welding nut 5, and the outer side wall of the welding nut 5 is fixedly connected to a lifting mechanism fixing plate 6;

[0014] When making the positioning tooling, first determine the fixed point between the aluminum profile body 1 and the lifting mechanism fixing plate 6, then pre-drill a φ5.2 through hole at the fixed point, then expand the φ13 through hole, and then pre-embed the M10*18mm fixed height rivet nut 3 inside the cavity body 2. When the embedded state of the fixed height rivet nut 3 is correct, use a φ10.5 twist drill to expand the through hole inside the fixed height rivet nut 3 to ensure that there is a 1mm radial gap between the inside of the fixed height rivet nut 3 and the external hexagonal bolt 4. Then use M8*30mm external hexagonal bolt 4 to connect the aluminum profile body 1 and the lifting mechanism fixing plate 6. Pre-tighten the external hexagonal bolt 4 first. After the relative position of the upper and lower profiles is corrected, tighten it with the company's internal 18Nm fixed torque wrench. Finally, the overall appearance can be sealed and waterproof.

[0015] like Figure 1 As shown, a spring washer 7 and a flat washer 8 are sequentially arranged between the external hexagonal bolt 4 and the upper portion of the fixed height rivet nut 3;

[0016] By combining the anti-loosening effect of the spring washer 7 with the stable support of the flat washer 8, the anti-loosening performance of the connection of the hexagonal bolt 4 is further enhanced. The flat washer 8 makes the tightening of the hexagonal bolt 4 more uniform and stable, providing a better basic condition for the spring washer 7 to play its anti-loosening role. The two work together to more effectively deal with various factors that may cause the hexagonal bolt 4 to loosen, greatly improving the reliability of the connection structure during long-term use.

[0017] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A structure for enhancing the bolt tightening torque in the cavity area of ​​an aluminum profile, comprising an aluminum profile body (1), characterized in that: A cavity body (2) is integrally formed inside the aluminum profile body (1), a fixed-height rivet nut (3) is provided inside the cavity body (2), an external hexagonal bolt (4) is provided above the fixed-height rivet nut (3), the bottom end of the external hexagonal bolt (4) passes through the interior of the fixed-height rivet nut (3) and extends to the bottom of the aluminum profile body (1), and is threadedly connected to a welding nut (5), and the outer side wall of the welding nut (5) is fixedly connected to a lifting mechanism fixing plate (6).

2. The structure for enhancing the bolt tightening torque in the cavity area of ​​an aluminum profile according to claim 1, characterized in that: A spring washer (7) and a flat washer (8) are sequentially arranged between the outer hexagonal bolt (4) and the upper portion of the fixed height rivet nut (3).

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