Sealing pressing rivet screw

Abstract

The utility model discloses a sealing pressing rivet screw, and belongs to the technical field of fasteners. The screw comprises a hexagonal screw head, a screw rod, a riveting step ring, a sealing ring and a guide step. The riveting step ring is of a circular ring structure concentric with the screw, and the outer wall of the riveting step ring is provided with an annular groove and a sealing ring; the multiple guide steps are arranged on the outer ring of the screw in a circumferential array mode and connected with the riveting step ring, and the outer wall of each guide step is composed of a first guide-in inclined face and a second guide-in inclined face. The sealing pressing rivet screw has the remarkable beneficial effects that through cooperation of the riveting step ring and the guide step, a multi-stage meshing structure is formed, and the anti-loosening and anti-vibration performance is improved; the sealing ring and the riveting step ring are integrally designed, so that the sealing performance is improved, and liquid or gas permeation is prevented; the double-inclined-surface design of the guide step optimizes the installation guidance quality and compatibility, and reduces the dependence on the size precision of the preassembled hole.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, specifically a sealing press-fit screw. Background Technology

[0002] In the field of sheet metal connections, press-fit screws are key fasteners, and their structural design plays a decisive role in the sealing performance, torsional resistance, and installation reliability of the connection. As industrial production environments become increasingly complex, the performance requirements for press-fit screws are becoming more and more stringent.

[0003] Currently, there are many technical problems in existing technologies that urgently need to be solved. For example, traditional press-fit screws mostly use a single press-fit part structure (such as a regular hexagonal or circular press-fit part). Although the clamping force is increased by using toothed or annular grooves, they lack an effective sealing design. In humid or corrosive environments, liquids can easily penetrate through the gap between the press-fit part and the thin plate 15, leading to corrosion or loosening of the connection. Although some products achieve waterproofing by adding independent sealing gaskets, they suffer from complex structures and the gaskets are prone to displacement or damage during installation.

[0004] In addition, conventional press-fit screws lack a guiding structure in the press-fit section, requiring precise alignment with the pre-installed hole 16 on the thin plate during installation. Otherwise, uneven force can easily lead to deformation of the press-fit step or dents on the surface of the thin plate. For example, although hexagonal head press-fit screws have strong torsional resistance, their right-angled edges can easily scratch the thin plate during pressing, and they have strict requirements for the dimensional tolerance of the pre-installed hole (usually controlled within ±0.1mm).

[0005] In conclusion, developing a new type of press-fit screw structure that can effectively improve sealing performance and has good guiding properties is of great practical significance for addressing the shortcomings of existing technologies and meeting the growing demand for high-quality connections in industrial production. Utility Model Content

[0006] In view of the shortcomings of the prior art, the present invention provides a sealing press-fit screw.

[0007] The technical solution adopted by this utility model is: a sealing rivet screw, including a hexagonal screw head and a screw rod, wherein the head of one end of the screw rod integrally formed by the hexagonal screw head also includes a rivet step ring, a sealing ring and a guide step;

[0008] The riveted stepped ring is a circular ring structure concentric with the screw. It is located on the end of the screw on one side of the hexagonal screw head. A ring groove is provided on the outer wall of the riveted stepped ring, and the aforementioned sealing ring is installed in the ring groove.

[0009] The guide steps are multiple and arranged in a circular array on the outer ring of the screw, with one end connected to the riveting step ring. The outer wall of the guide step includes a first guide slope and a second guide slope. The low point of one end of the first guide slope extends to the surface of the screw, and the high point of the other end is connected to the low point of the second guide slope. The high point of the second guide slope is connected to the riveting step ring.

[0010] Furthermore, the guide steps consist of 6-12 steps.

[0011] Furthermore, the angle α between the first guide slope and the screw axis is greater than the angle b between the second guide slope and the screw axis.

[0012] Furthermore, the included angle α is 15-30°.

[0013] Furthermore, the included angle b is 10-20°.

[0014] Furthermore, the riveted stepped ring has an outer wall that is a conical surface with a larger upper part and a smaller lower part, and the angle c between the conical surface and the screw axis is 1-2 degrees.

[0015] Furthermore, the outer edge of the riveted stepped ring on the side away from the screw head is provided with a rounded corner.

[0016] Furthermore, a rounded corner is provided between the first and second inclined surfaces.

[0017] The beneficial effects of this utility model are:

[0018] 1. Enhanced anti-loosening and vibration resistance: A multi-level interlocking structure is formed through the synergistic action of the riveting step ring and the guide step. Guided by the guide step, the riveting step ring is gradually pressed into the pre-installed hole 16 of the thin plate 15. During this process, the guide step induces gradual plastic deformation of the material until the riveting step ring is embedded in the pre-installed hole. Simultaneously, the sealing ring provides radial locking force, effectively resisting axial vibration and shear loads, thereby improving anti-loosening and vibration resistance. The design of the guide step's first and second guide ramps ensures a more uniform force distribution during riveting, reducing local stress concentration and avoiding scratches or deformation of the thin plate caused by the right-angled edges of traditional hexagonal head screws.

[0019] 2. Improved sealing performance: By embedding a sealing ring (such as rubber or silicone) within the annular groove and then pressing it into the thin plate, a physical barrier is formed to prevent liquid or gas penetration, making it particularly suitable for humid or corrosive environments. The integrated design of the pressed stepped ring and the sealing ring avoids the risk of displacement or detachment of traditional separate sealing gaskets, and eliminates the need for additional assembly steps, reducing production costs.

[0020] 3. Optimized installation guidance and compatibility: The guide steps of the circumferential array provide progressive guidance through a double-sloping surface design, reducing the dependence on the accuracy of pre-installed hole dimensions. This allows for a more relaxed tolerance, making it suitable for thin plates and irregular hole scenarios, thus reducing production costs.

[0021] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is a side view of the present invention.

[0024] Figure 3 This is a cross-sectional schematic diagram of the present invention.

[0025] Figure 1-3 In the middle: 1. Hexagonal screw head; 2. Screw; 3. Riveted step ring; 4. Sealing ring; 5. Guide step; 6. Annular groove; 7. Guide slope one; 8. Guide slope two; 11. Conical surface; 13. Rounded corner one; 14. Rounded corner two; 15. Thin plate; 16. Pre-installed hole. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] This utility model provides a sealing press-fit screw.

[0029] In this embodiment, refer to Figure 1-3 The sealing rivet screw includes a hexagonal screw head 1 and a screw 2. The head of one end of the screw 2, which is integrally formed with the hexagonal screw head, also includes a rivet step ring 3, a sealing ring 4 and a guide step 5.

[0030] The riveted stepped ring 3 is a circular ring structure concentric with the screw 2. It is located on the end of the screw on one side of the hexagonal screw head. A ring groove 6 is provided on the outer wall of the riveted stepped ring, and the sealing ring 4 mentioned above is installed in the ring groove 6.

[0031] The guide steps are multiple and arranged in a circular array on the outer ring of the screw, with one end connected to the riveting step ring. The outer wall of the guide step includes a first guide slope 7 and a second guide slope 8. The low point of one end of the first guide slope 7 extends to the surface of the screw, and the high point of the other end is connected to the low point of the second guide slope 8. The high point of the second guide slope 8 is connected to the riveting step ring.

[0032] In the above technical solution, a sealing ring (such as rubber or silicone) is embedded in the annular groove on the outer wall of the riveting step ring. During the riveting process, the plastic deformation of the material squeezes the sealing ring, making it tightly fit against the inner wall of the pre-installed hole in the thin plate, forming a physical sealing layer and improving the sealing effect. Furthermore, the guide step greatly improves the guidance during installation, reduces the requirements for installation precision, and increases installation efficiency. The guide step consists of two guide ramps, achieving step-by-step guidance, making the riveting process less strenuous, more uniform in application, and improving the riveting quality.

[0033] Specifically, there are 6-12 guide steps.

[0034] In this embodiment, the guide steps are set to 6-12, which can provide uniform and effective guiding force, ensure that the rivet screw enters the pre-installed hole smoothly during installation, and ensure that the strength of the screw structure is not affected too much, thus maintaining the overall reliability of the product.

[0035] Specifically, the angle α between the first guide slope and the screw axis is greater than the angle b between the second guide slope and the screw axis; the angle α is 15-30°; and the angle b is 10-20°.

[0036] In this embodiment, the included angle 'a' is set to be greater than included angle 'b'. Included angle 'a' allows the sheet metal to be quickly guided into the plastic deformation zone, reducing the initial pressing force. Included angle 'b' extends the material filling time, ensuring full engagement between the riveting step ring and the sheet metal.

[0037] Specifically, the riveted stepped ring has an outer wall that is a conical surface 11 with a larger upper part and a smaller lower part, and the angle c between the conical surface 11 and the center line of the screw is 1-2 degrees.

[0038] In this embodiment, the outer wall of the riveted stepped ring is designed as a conical surface, wider at the top and narrower at the bottom, with an angle of 1-2 degrees between the conical surface and the screw axis. During the riveting process, this conical structure allows the contact area between the riveted stepped ring and the thin plate to gradually increase, resulting in a more uniform pressure distribution and facilitating better sealing performance of the sealing ring. Furthermore, the conical design forms a slightly inverted conical structure after riveting, utilizing the springback force of the thin plate to generate radial locking force.

[0039] Specifically, the outer edge of the riveted stepped ring on the side away from the screw head is provided with a rounded corner of 13.

[0040] In this embodiment, a rounded corner 13 is provided on the outer edge of the riveting step ring away from the screw head. This is mainly to avoid sharp edges from scratching the surface of the thin plate during the riveting process, and also to reduce stress concentration and make the riveting process more stable.

[0041] Specifically, a rounded corner 14 is provided between the first and second inlet inclined surfaces.

[0042] Setting a rounded corner 14 between the first and second guide slopes makes the guiding process smoother, avoids the sharp corners at the transition between the two slopes from hindering the installation, and reduces friction during the installation process.

[0043] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A sealed rivet comprising a hexagonal head and a shank, the hexagonal head being integrally formed with a head at one end of the shank, characterised in that: The riveting step ring, the sealing ring and the guide step are further included; The riveting step ring is a circular ring structure concentric with the screw rod, and is arranged on the end of the screw rod on the side of the hexagonal screw head. An annular groove is arranged on the outer wall of the riveting step ring, and the sealing ring is arranged in the annular groove. The guide step is in the form of a circumferential array and is arranged on the outer ring of the screw rod and connected to the riveting step ring at one end. The outer wall of the guide step comprises a first guide inclined surface and a second guide inclined surface. The low point of the first guide inclined surface at one end extends to the surface of the screw rod, and the high point at the other end is connected to the low point of the second guide inclined surface. The high point of the second guide inclined surface is connected to the riveting step ring.

2. The sealed rivet according to claim 1, wherein: The guide step is 6-12 in number.

3. The sealed rivet according to claim 1, wherein: The angle a between the first guide inclined surface and the axis of the screw rod is greater than the angle b between the second guide inclined surface and the axis of the screw rod.

4. The sealed rivet according to claim 3, wherein: The angle a is 15-30°.

5. The sealed rivet according to claim 3, wherein: The angle b is 10-20°.

6. The sealed rivet according to claim 1, wherein: The outer wall of the riveting step ring is a tapered surface that is large at the top and small at the bottom. The angle c between the tapered surface and the axis of the screw rod is 1-2°.

7. The sealed rivet according to claim 1, wherein: The outer edge of the side of the riveting step ring away from the screw head is provided with a first rounded corner.

8. The sealed rivet according to claim 1, wherein: The first guide inclined surface and the second guide inclined surface are provided with a second rounded corner.

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