Flat head hollow rivet

Abstract

The utility model discloses a flat head hollow rivet which is composed of a rivet cap and a rivet rod, the rivet rod comprises a solid section and a hollow section with a through hole, the opening end of the through hole is provided with a riveting hole with the inner diameter larger than that of the through hole, and the inner wall and the outer wall of the riveting hole are respectively provided with a V-shaped inner notch and a V-shaped outer notch which are opposite to each other in a circumferential array mode. According to the design, the pressure needed during riveting is effectively reduced, the requirement for the performance of riveting equipment is lowered, and the equipment purchase cost is reduced; and meanwhile, the end of the rivet rod is promoted to be evenly dispersed and turned outwards in the riveting pressing and turning-outwards process, uneven thickness of riveting branches is avoided, the connection stability and strength are greatly improved, the service life of the rivet is remarkably prolonged, and the use cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of rivet technology, specifically to a flat-head hollow rivet. Background Technology

[0002] In the field of mechanical connections, hollow rivets are widely used as a common type of fastener. Traditional hollow rivets generally consist of a rivet head and a rivet shank. The rivet head is usually coaxially and integrally mounted on the top end face of the rivet shank, while the rivet shank includes a solid section and a hollow section with a through hole. The solid section is close to the rivet head and is integrally formed with the rivet head.

[0003] Currently, in the practical use of hollow rivets, when riveting the rivet shank, external tools, such as rivet guns, are mainly used. Pressure is applied to cause the tail of the rivet to expand and deform outwards, thus securing the connector. However, the through-hole ends of existing hollow rivets are mostly flat structures with relatively thick walls. This requires significant pressure to make the through-hole end turn outwards, placing high demands on the performance of the riveting equipment, increasing equipment costs and energy consumption. Furthermore, it is difficult to ensure that the outward cracking is evenly distributed. In actual riveting results, one riveting branch is often thicker than the other. This uneven riveting state cannot effectively stabilize the connection, resulting in insufficient overall connection strength. During use, problems such as loosening and detachment easily occur, seriously affecting the product's service life and increasing operating costs.

[0004] In summary, the existing hollow rivet structure has many drawbacks in practical applications, and there is an urgent need for a new structural design to improve the riveting effect of hollow rivets, enhance connection stability and service life, and reduce usage costs. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides a flat-head hollow rivet.

[0006] The technical solution adopted by this utility model is: a flat-head hollow rivet, including a rivet head and a rivet shank. The rivet head is coaxially and integrally disposed on the top end face of the rivet shank. The rivet shank includes a solid section and a hollow section with a through hole. A riveting hole is provided at one end of the opening of the through hole. The inner diameter of the riveting hole is larger than the inner diameter of the through hole. The inner wall and outer wall of the riveting hole are respectively arranged in a circumferential array with inner and outer cuts. The inner and outer cuts are arranged opposite each other, and both the inner and outer cuts are "V" shaped structures.

[0007] Furthermore, the lengths of the inner and outer cuts are equal to the depth of the riveting hole.

[0008] Furthermore, the depth to which the inner cut enters the outer wall of the riveting hole is greater than the depth to which the outer cut enters the outer wall of the riveting hole.

[0009] Furthermore, the number of internal and external incisions is 12-20.

[0010] Furthermore, the inner sides of the rivet holes and through holes are provided with rounded corners.

[0011] Furthermore, the length ratio of the solid segment to the hollow segment is 1:5.

[0012] Furthermore, a reinforcing ring is provided between the rivet head and the rivet shank, and the outer circumference of the reinforcing ring has a plurality of wedge-shaped reinforcing plates.

[0013] The beneficial effects of this utility model are:

[0014] 1. In terms of riveting operations, by setting a larger diameter riveting hole, the wall thickness at the end of the rivet shank is effectively reduced. Compared to traditional hollow rivets, the pressure required during riveting is significantly reduced. This not only alleviates the stringent requirements on the performance of riveting equipment but also lowers equipment procurement costs.

[0015] 2. From the perspective of riveting effect, inner and outer cuts are arranged in a circular array on the inner and outer walls of the riveting hole, respectively, and they are positioned opposite each other. This structural design allows the rivet shank end to be evenly distributed and turned outward during the riveting process. This avoids the uneven branching phenomenon caused by the end structure of traditional rivets, greatly improving the stability of the connection. The stress on the connection part is more uniform, and under the action of external force, there will be no loosening or falling off due to local stress concentration, thus enhancing the overall connection strength of the connector.

[0016] 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

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a structural schematic diagram from another perspective of the present invention.

[0019] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0020] Figure 1-3 In the middle: 1. Rivet head; 2. Rivet shank; 3. Through hole; 4. Riveting hole; 5. Inner cut; 6. Outer cut; 7. Rounded corner; 8. Reinforcing ring; 9. Wedge-shaped reinforcing plate. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] This utility model provides a flat-head hollow rivet.

[0024] In this embodiment, refer to Figure 1-3 The flat-head hollow rivet includes a rivet head 1 and a rivet shank 2. The rivet head 1 is coaxially and integrally disposed on the top end face of the rivet shank. The rivet shank includes a solid section and a hollow section with a through hole 3. A riveting hole 4 is provided at one end of the opening of the through hole 3. The inner diameter of the riveting hole is larger than the inner diameter of the through hole. The inner wall and outer wall of the riveting hole are respectively arranged with an inner cut 5 and an outer cut 6 in a circular array. The inner cut 5 and the outer cut 6 are arranged opposite each other, and both the inner cut and the outer cut are "V" shaped structures.

[0025] In the above technical solution, a riveting hole with a larger inner diameter is set on one side of the through hole opening in the hollow section of the rivet shank, which changes the structure of the rivet shank end and reduces the wall thickness. Simultaneously, "V"-shaped inner and outer cutouts are arranged in a circumferential array on the inner and outer walls, providing a guiding path for the outward deformation of the material during riveting. This effectively reduces the riveting pressure required, alleviates equipment requirements and energy consumption, ensures uniform outward deformation during riveting, greatly improves connection stability and strength, extends rivet lifespan, and reduces costs.

[0026] Specifically, the lengths of the inner and outer cuts are equal to the depth of the riveting hole.

[0027] In this embodiment, the lengths of the inner and outer cuts are equal to the depth of the riveting hole, ensuring that the material along the direction guided by the cuts can deform uniformly during riveting within the entire length of the riveting hole. When riveting force is applied, the material can be turned outwards according to the design intent from the bottom of the riveting hole to the opening, ensuring the consistency of riveting deformation.

[0028] Specifically, the depth to which the inner cut enters the outer wall of the riveting hole is greater than the depth to which the outer cut enters the outer wall of the riveting hole.

[0029] In this embodiment, the inner cut penetrates deeper into the outer wall of the riveting hole than the outer cut. This design results in a greater degree of deformation of the inner wall material of the rivet shank compared to the outer wall during riveting. Because the inner cut penetrates deeper, the inner wall material is more likely to fold outward along the inner cut when subjected to riveting pressure. This creates a coordinated deformation mechanism between the inner and outer wall materials, guiding the end of the rivet shank to expand outward uniformly as a whole.

[0030] Specifically, the number of internal and external incisions is 12-20.

[0031] In this embodiment, the number of inner and outer cuts is set to 12-20. This range ensures a sufficient number of deformation guide points in the circumferential direction without excessively weakening the rivet shank due to too many cuts. During riveting, multiple cuts are evenly distributed on the inner and outer walls of the riveting hole, allowing the material to have a suitable deformation path in all directions, thereby achieving uniform outward turning.

[0032] Specifically, the inner sides of the rivet holes and through holes are provided with rounded corners 7; the length ratio of the solid section to the hollow section is 1:5; a reinforcing ring 8 is provided between the rivet head and the rivet rod, and a number of wedge-shaped reinforcing plates 9 are arranged in a circular array around the outer ring of the reinforcing ring.

[0033] In this embodiment, a reinforcing ring is provided between the rivet head and the rivet shank, and several wedge-shaped reinforcing plates are arrayed around the outer circumference. The reinforcing ring enhances the strength of the connection between the rivet head and the rivet shank, preventing breakage during stress. The wedge-shaped reinforcing plates further disperse the stress acting on the connection between the rivet head and the rivet shank, uniformly transmitting the force to all parts of the rivet through their structural shape.

[0034] 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 flat-head hollow rivet, comprising a rivet head and a rivet shank, wherein the rivet head is coaxially and integrally disposed on the top end face of the rivet shank, and the rivet shank comprises a solid section and a hollow section having a through hole, characterized in that: A riveting hole is provided at one end of the opening of the through hole. The inner diameter of the riveting hole is larger than the inner diameter of the through hole. The inner wall and outer wall of the riveting hole are respectively arranged in a circumferential array with inner and outer cuts. The inner and outer cuts are arranged opposite each other, and both the inner and outer cuts are "V" shaped structures.

2. The flat-head hollow rivet according to claim 1, characterized in that: The lengths of the inner and outer cuts are equal to the depth of the riveting hole.

3. The flat-head hollow rivet according to claim 1, characterized in that: The depth to which the inner cut enters the outer wall of the riveting hole is greater than the depth to which the outer cut enters the outer wall of the riveting hole.

4. The flat-head hollow rivet according to claim 1, characterized in that: The number of internal and external incisions is 12-20.

5. The flat-head hollow rivet according to claim 1, characterized in that: The inner sides of the rivet holes and through holes are rounded.

6. The flat-head hollow rivet according to claim 1, characterized in that: The ratio of the length of the solid segment to the length of the hollow segment is 1:

5.

7. The flat-head hollow rivet according to claim 1, characterized in that: A reinforcing ring is provided between the rivet head and the rivet rod, and a number of wedge-shaped reinforcing plates are arranged in a circumferential array on the outer ring of the reinforcing ring.

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