High-sealing-performance flow drill rivet applied to upper-layer plate trepanning

Abstract

The utility model discloses a high-leakproofness flow drill rivet applied to trepanning of an upper-layer plate in the technical field of rivets, which comprises a rivet head, a support block is arranged at the bottom of the outer surface of the rivet head, a screw is arranged in the middle of the bottom end of the rivet head, and a standard thread section, a self-tapping thread section and a conical part are arranged on the outer surface of the screw. The embedded flange and the rubber ring are arranged, when a worker uses the flow drill rivet to connect plates, if the upper-layer plate is a low-strength metal plate, the worker can select the flow drill rivet without the rubber ring, and along with screwing-in of the screw rod, after the embedded flange makes contact with the upper-layer metal plate, the embedded flange rubs the plates and pierces into the plates, and a sealing structure is formed; if the upper-layer plate is a high-strength steel plate with a prefabricated hole, a worker can select a flow drill rivet with a rubber ring, so that in the screwing process, the rubber ring is extruded and deformed until the embedded flange is in contact with the upper-layer steel plate, and the effect of high sealing performance is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of rivets, in particular to a high-sealing flow drill rivet used for opening holes in upper plates. Background Art

[0002] High-speed flow drill rivets are often used for single-sided riveting at the interface of dissimilar materials. They are especially widely used in sheet metal and profile connection systems such as battery packs and car bodies. Flow drill rivets are a type of fastener with self-piercing and extrusion effects. They can automatically penetrate and fix multiple layers of material during the connection process. Due to their single-sided connection process and high strength, flow drill rivets are also suitable for occasions where different materials need to be connected.

[0003] However, there are some problems with the existing technology: the flow drill rivet connection has certain requirements on the thickness and strength of the connected plates. For example, when a steel plate with too high strength and too thick thickness is used as the upper plate, it is usually necessary to open a hole in the upper plate, and the flow drill rivet may not be able to ensure that it is perpendicular to the connected plates during riveting. This may form a potential leakage channel between the bottom surface of the support block of the flow drill rivet, the plate opening and the plate, which cannot meet the sealing design requirements. Therefore, we propose a high-sealing flow drill rivet for the upper plate opening. Utility Model Content

[0004] In response to the deficiencies in the prior art, the utility model provides a high-sealing flow drill rivet for opening holes in upper panels. An embedded flange and a rubber ring are provided on the bottom surface of the support block of the flow drill rivet, so that the rivet head and the panel are tightly fitted to achieve sealing.

[0005] The purpose of the utility model is achieved as follows: a high-sealing flow drill rivet used for opening holes in upper plates includes a rivet head, a support block is provided at the bottom of the outer surface of the rivet head, a screw is provided in the middle of the bottom end of the rivet head, the outer surface of the screw is provided with a standard thread section, a self-tapping thread section and a cone, and the bottom surface of the support block is provided with an embedded flange.

[0006] Optionally, the embedded flange is provided on the inner edge of the bottom surface of the support block, and a rubber ring is provided on the outer edge of the bottom surface of the support block.

[0007] Optionally, the embedded flange is provided on the outer edge of the bottom surface of the support block, and a rubber ring is provided on the inner edge of the bottom surface of the support block.

[0008] Optionally, a chip groove is provided at the bottom of the rivet head, and the chip groove is circumferentially provided between the support block and the screw rod.

[0009] Optionally, the height of the rubber ring is greater than the height of the embedded flange, and the inner diameter of the rubber ring is greater than the diameter of the chip groove.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] The utility model provides an embedded flange and a rubber ring. When the staff uses a flow drill rivet to connect the plates, if the upper plate is a plate metal with lower strength, the staff can choose a flow drill rivet without a rubber ring. As the screw is screwed in, the embedded flange contacts the upper plate metal, rubs against the plate and penetrates into the plate, forming a sealing structure; if the upper plate is a high-strength steel plate with prefabricated holes, the staff can choose a flow drill rivet with a rubber ring. During the tightening process, the rubber ring is squeezed and deformed until the embedded flange contacts the upper steel plate, and a sealing structure is formed using the rubber ring, thereby achieving a highly sealed connection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0013] Figure 1 It is a schematic diagram of a partial cross-sectional structure of a flow drill rivet in the prior art;

[0014] Figure 2 This is a partial cross-sectional structural diagram provided by the utility model;

[0015] Figure 3 This is a schematic diagram of a partial cross-sectional structure provided with a rubber ring provided by the utility model;

[0016] Figure 4 This is a schematic diagram of a partial cross-sectional structure provided with a rubber ring provided by the utility model;

[0017] Figure 5 This is a partial cross-sectional structural diagram of the utility model when the upper connecting plate is an aluminum plate;

[0018] Figure 6 It is a partial cross-sectional structural schematic diagram provided by the utility model when the connected upper plate material is a steel plate.

[0019] In the figure: 1. Rivet head; 2. Support block; 3. Chip groove; 4. Screw; 5. Standard thread section; 6. Self-tapping thread section; 7. Cone; 8. Embedded flange; 9. Rubber ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figures 1 to 6 As shown, the high-sealing flow drill rivet for opening holes in upper plates provided by an embodiment of the present invention includes a rivet head 1, a support block 2 is provided at the bottom of the outer surface of the rivet head 1, a screw 4 is provided in the middle of the bottom end of the rivet head 1, and the outer surface of the screw 4 is provided with a standard thread section 5, a self-tapping thread section 6 and a cone 7, and the bottom surface of the support block 2 is provided with an embedded flange 8.

[0022] Furthermore, an embedded flange 8 is provided on the inner edge of the bottom surface of the support block 2 , and a rubber ring 9 is provided on the outer edge of the bottom surface of the support block 2 .

[0023] Furthermore, an embedded flange 8 is provided on the outer edge of the bottom surface of the support block 2 , and a rubber ring 9 is provided on the inner edge of the bottom surface of the support block 2 .

[0024] When the upper plate is a high-strength steel plate with prefabricated holes and the embedded flange 8 is difficult to penetrate the steel plate to form a sealing structure, as the screw 4 is screwed in, during the tightening process, the rubber ring 9 will be squeezed and deformed until the embedded flange 8 contacts the upper steel plate, thereby forming a sealing structure using the rubber ring 9.

[0025] Furthermore, a chip groove 3 is provided at the bottom of the rivet head 1 , and the chip groove 3 is provided around and between the support block 2 and the screw rod 4 .

[0026] When the flow drill rivet pierces the connected plates under high-speed rotation and axial pressure to form a riveted hole, the excess material drilled out of the upper plate will flip upward, and the material drilled out of the lower plate will flip upward and downward at the same time. The material flipped upward can enter the chip groove 3 to avoid damaging the sealing structure.

[0027] Furthermore, the height of the rubber ring 9 is greater than the height of the embedded flange 8 , and the inner diameter of the rubber ring 9 is greater than the diameter of the chip groove 3 .

[0028] By designing that the height of the rubber ring 9 is greater than the height of the embedded flange 8, during the tightening process, the rubber ring 9 is first squeezed and deformed until the embedded flange 8 contacts the upper steel plate, ensuring that a sealing structure is formed between the rubber ring 9 and the upper steel plate.

[0029] The working principle and use process of this utility model:

[0030] The flow drill rivet pierces the connected plates under the action of high-speed rotation and axial pressure to form a riveted hole. At the same time, the excess material drilled out of the upper plate is turned upward, and the material drilled out of the lower plate is turned up and down at the same time. The material turned upward enters the opening area and the chip groove 3 of the upper plate, and the material turned downward forms a bulge under the lower plate. The self-tapping thread section 6 on the flow drill rivet taps threaded holes in the holes of the connected plates and the upper and lower flanges. The standard thread section 5 is engaged with the standard thread on the plate. If the upper plate is a sheet metal with lower strength, the staff can choose a flow drill rivet without a rubber ring 9. As the screw 4 is screwed in, the embedded flange 8 contacts the upper sheet metal, and it will rub against the plate and penetrate to form a sealing structure, such as Figure 5 As shown; if the upper plate is a steel plate with higher strength, it is necessary to drill holes first. The staff can choose to use a flow drill rivet with a rubber ring 9, so that during the tightening process, the rubber ring 9 first contacts the upper steel plate and is squeezed and deformed until the embedded flange 8 contacts the upper steel plate, and the rubber ring 9 is used to form a sealing structure, such as Figure 6 As shown, a highly sealed connection effect is achieved.

[0031] The above embodiments are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A high-sealing flow drill rivet for opening holes in upper plates, comprising a rivet head (1), a support block (2) provided at the bottom of the outer surface of the rivet head (1), a screw rod (4) provided at the middle of the bottom end of the rivet head (1), and a standard thread section (5), a self-tapping thread section (6) and a cone section (7) provided on the outer surface of the screw rod (4), characterized in that: The bottom surface of the support block (2) is provided with an embedded flange (8).

2. The high-sealing flow drill rivet for opening holes in upper panels according to claim 1, characterized in that: The embedded flange (8) is arranged on the inner edge of the bottom surface of the support block (2), and a rubber ring (9) is arranged on the outer edge of the bottom surface of the support block (2).

3. The high-sealing flow drill rivet for opening holes in upper panels according to claim 1, characterized in that: The embedded flange (8) is arranged on the outer edge of the bottom surface of the support block (2), and a rubber ring (9) is arranged on the inner edge of the bottom surface of the support block (2).

4. The high-sealing flow drill rivet for opening holes in upper panels according to claim 3, characterized in that: A chip groove (3) is provided at the bottom of the rivet head (1), and the chip groove (3) is circumferentially provided between the support block (2) and the screw rod (4).

5. The high-sealing flow drill rivet used for opening holes in upper panels according to claim 4, characterized in that: The height of the rubber ring (9) is greater than the height of the embedded flange (8), and the inner diameter of the rubber ring (9) is greater than the diameter of the chip groove (3).

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