A detachable rivet

Abstract

The utility model belongs to rivet technical field especially, it is detachable rivet, including rivet core pole, expansion end and pull -out end, rivet core pole one end fixed threaded end, rivet core pole top outside installs the clamping hole end, the clamping hole end bottom fixedly connected with the clamping plate, the clamping hole end axial position sets telescopic end and expansion end in proper order, expansion end away from telescopic end one end is provided with expansion head, the last fixedly connected with pull -out end of expansion head, through the design of pull -out end head, and the operation of combining rivet core pole reverse rotation, can efficiently guide expansion head to exit, simple operation is direct, provides great convenience for the maintenance, replacement of equipment, through telescopic end, locating hole, butt joint hole and adjustable mechanism that is formed by the locating pin, has realized the stepless or step regulation of rivet effective working length, makes single specification rivet can adapt to the connection of different thicknesses of plate material in a certain range, greatly improved the versatility.

Description

Technical Field

[0001] This utility model belongs to the field of rivet technology, specifically relating to a detachable rivet. Background Technology

[0002] In the field of mechanical connections, rivets are a widely used type of permanent fastener. Traditional solid rivets are installed by using a rivet gun to impact or compress the end of the rivet shank, causing it to plastically deform and form the rivet head, thereby fastening the workpiece.

[0003] However, although this connection method is reliable, it is a non-removable connection. Once installed, it is difficult to remove. If repair or replacement of parts is required, the rivets can only be destroyed by destructive methods such as drilling and grinding. This is cumbersome, inefficient, and can easily damage the base material.

[0004] Furthermore, most threaded rivets have a fixed length, which cannot flexibly adapt to connecting plates of different thicknesses. For work with non-standard thicknesses, it is necessary to prepare rivets of various specifications, resulting in poor versatility and increased management and inventory costs. Therefore, we propose a detachable rivet. Utility Model Content

[0005] To address the aforementioned background issue, the existing technology is a non-detachable connection that is difficult to remove once installed. If repair or replacement of parts is required, the rivets can only be destroyed by destructive methods such as drilling and grinding, which is cumbersome, inefficient, and easily damages the base material.

[0006] Furthermore, most threaded rivets have a fixed length, making them inflexible for connecting plates of different thicknesses. For work involving non-standard thicknesses, multiple rivet specifications need to be prepared, resulting in poor versatility and increased management and inventory costs. This invention provides a detachable rivet.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a detachable rivet, comprising a rivet core rod, an expansion end, and a pull-out end, wherein a threaded end is fixed at one end of the rivet core rod, a locking hole end is installed on the outer side of the top of the rivet core rod, and a locking plate is fixedly connected to the bottom of the locking hole end;

[0008] The card hole end is provided with a telescopic end and an expansion end in sequence at the axial position. An expansion head is provided at the end of the expansion end away from the telescopic end, and a pull-out end is fixedly connected to the end of the expansion head.

[0009] As a preferred embodiment of the detachable rivet of this utility model, one end of the telescopic end is telescopically inserted into the locking hole end, and the other end is telescopically inserted into the expansion end.

[0010] As a preferred embodiment of the detachable rivet of this utility model, the insertion points of the locking end and the telescopic end, as well as the insertion points of the expansion end and the telescopic end, are all provided with limiting structures to prevent relative rotation between the two. The limiting structures are mutually cooperating keys and keyways provided on the insertion surface.

[0011] As a preferred embodiment of the detachable rivet of this utility model, a plurality of mating holes are spaced apart along the axial direction on the tube wall of the telescopic end, and a positioning hole is provided on the tube wall of the expansion end. A positioning pin is detachably inserted into the positioning hole and a selected mating hole to fix the telescopic end and the expansion end relative to each other.

[0012] As a preferred embodiment of the detachable rivet of this utility model, the outer peripheral wall of the positioning pin is fitted with an elastic rubber ring.

[0013] As a preferred embodiment of the detachable rivet of this utility model, the cross-sectional dimension of the pull-out end is larger than the mounting through hole on the plate, and its exposed end is provided with a groove or flange for cooperating with a disassembly tool.

[0014] As a preferred embodiment of the detachable rivet of this utility model, the expansion head is a component made of highly elastic aluminum alloy material, and the expansion head is a spherical head.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: By designing the pull-out end and combining it with the reverse rotation of the rivet core rod, the expansion head can be efficiently guided out. The elastic rebound of the expansion end material is used to achieve contraction. This disassembly process does not require damage to the rivet or workpiece, and the operation is simple and direct, providing great convenience for equipment maintenance and replacement. Through the adjustable mechanism composed of the telescopic end, positioning hole, docking hole and positioning pin, the effective working length of the rivet can be infinitely or steppedly adjusted, so that a single specification of rivet can adapt to the connection of plates of different thicknesses within a certain range, which greatly improves versatility, reduces the number of specifications and inventory pressure, and prevents the problems of existing rivets being difficult to remove once installed and having non-adjustable length and poor versatility. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

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

[0018] Figure 2 This is a schematic diagram of the rivet core rod and the locking hole end of this utility model;

[0019] Figure 3This is a schematic diagram of the structure of the card hole end and the expansion end of this utility model;

[0020] Figure 4 This is a structural diagram of the present invention during use.

[0021] In the diagram: 1. Rivet core rod; 2. Threaded end; 3. Clamping hole end; 4. Clamping plate; 5. Expansion end; 6. Expansion head; 7. Pull-out end; 8. Telescopic end; 9. Positioning hole; 10. Butt hole; 11. Positioning pin. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] like Figures 1-4 As shown;

[0025] A detachable rivet includes a rivet core rod 1, an expansion end 5, and a pull-out end 7. One end of the rivet core rod 1 is fixed with a threaded end 2, and a locking end 3 is installed on the outer side of the top of the rivet core rod 1. A locking plate 4 is fixedly connected to the bottom of the locking end 3. An extension end 8 and an expansion end 5 are arranged sequentially in the axial position of the locking end 3. An expansion head 6 is provided at the end of the expansion end 5 away from the extension end 8, and the pull-out end 7 is fixedly connected to the end of the expansion head 6.

[0026] In this implementation plan: by designing the pull-out end 7 and combining it with the reverse rotation of the rivet core rod 1, the expansion head 6 can be efficiently guided out. The elastic rebound of the expansion end 5 material is used to achieve contraction. This disassembly process does not require damage to the rivet or workpiece, and the operation is simple and direct, which greatly facilitates the maintenance and replacement of the equipment. Through the adjustable mechanism composed of the telescopic end 8, positioning hole 9, docking hole 10 and positioning pin 11, the effective working length of the rivet can be infinitely or steppedly adjusted, so that a single specification of rivet can adapt to the connection of plates of different thicknesses within a certain range, which greatly improves versatility and reduces the number of specifications and inventory pressure.

[0027] In an optional embodiment, one end of the telescopic end 8 is telescopically inserted into the slot end 3, and the other end is telescopically inserted into the expansion end 5.

[0028] In this implementation scheme: by inserting the telescopic end 8 into the locking end 3 and the expansion end 5, the overall working length of the rivet becomes a variable. Users can simply stretch or compress the telescopic end 8 to adapt the rivet to the connected plates of different thicknesses.

[0029] In an optional embodiment, the insertion points of the card hole end 3 and the telescopic end 8, as well as the insertion points of the expansion end 5 and the telescopic end 8, are provided with limiting structures to prevent relative rotation between the two. The limiting structures are mutually cooperating keys and keyways provided on the insertion surfaces.

[0030] In this implementation scheme, the key and keyway structure that works together effectively prevents relative rotation between the locking end 3 and the telescopic end 8, as well as between the expansion end 5 and the telescopic end 8. This ensures that the entire expansion body will not rotate when the rotating rivet core rod 1 is installed or removed, thus guaranteeing the smoothness and reliability of the operation.

[0031] In an optional embodiment, a plurality of mating holes 10 are provided on the tube wall of the telescopic end 8 at intervals along its axial direction, and a positioning hole 9 is provided on the tube wall of the expansion end 5. A positioning pin 11 is detachably inserted into the positioning hole 9 and a selected mating hole 10 so that the telescopic end 8 and the expansion end 5 are fixed relative to each other.

[0032] In this implementation scheme, the multiple mating holes 10 on the telescopic end 8 cooperate with the positioning holes 9 on the expansion end 5 and are fixed by positioning pins 11, realizing a simple, reliable and low-cost length adjustment mechanism. This allows a single specification of rivet to be adjusted to adapt to plates of different thicknesses, greatly improving the versatility of the product.

[0033] In an optional embodiment, the outer peripheral wall of the positioning pin 11 is fitted with an elastic rubber ring.

[0034] In this implementation scheme: the elastic rubber ring on the outer peripheral wall of the positioning pin 11 can increase the friction between it and the hole wall, provide a good damping effect, and prevent the positioning pin 11 from accidentally loosening under equipment vibration or impact environment, thereby ensuring the stability of the length locking state of the rivet during operation.

[0035] In an optional embodiment, the cross-sectional dimension of the pull-out end 7 is larger than the mounting through hole on the plate, and its exposed end is provided with a groove or flange for engaging with a disassembly tool.

[0036] In this implementation scheme: the pull-out end 7 is designed to be larger than the mounting through hole and is provided with a groove or flange, which provides a clear force application point for the disassembly tool. During disassembly, the tool can firmly hold the pull-out end 7, which facilitates the application of a uniform and strong axial tensile force, thereby achieving smooth disassembly of the rivet.

[0037] In an optional embodiment, the expansion head 6 is a component made of a highly elastic aluminum alloy material, and the expansion head 6 is a spherical head.

[0038] In this implementation plan: the expansion head 6 and the expansion end 5 connected thereto are made of high elasticity aluminum alloy, which ensures that the component can still generate sufficient elastic rebound and restore its original shape after multiple expansion deformations. The expansion head 6 is specifically designed as a spherical head. Its smooth transition curved surface structure is conducive to more smoothly and evenly opening the expansion end 5 during installation, making the radial expansion force distribution of the expansion end 5 better, while reducing stress concentration and improving the fatigue life of the component.

[0039] Working principle:

[0040] Based on the total thickness of the plates to be connected, the effective working length of the rivet expansion body is pre-adjusted. The operator changes the extension length of the telescopic end 8 relative to the expansion end 5 by axially stretching or compressing the telescopic end 8. When the required length is reached, the positioning hole 9 on the expansion end 5 is aligned with the corresponding docking hole 10 on the telescopic end 8. The positioning pin 11 is then passed through the aligned positioning hole 9 and docking hole 10 to complete the fixation of the expansion body length. The elastic rubber ring on the outer wall of the positioning pin 11 can effectively increase the friction and prevent it from loosening on its own under vibration.

[0041] The rivet expansion body, which has been adjusted to the correct length, from the locking end 3 to the pull-out end 7, is inserted into the pre-drilled through hole in the plate. The locking plate 4 of the locking end 3 is pressed against one side of the plate surface. The rivet core 1 is passed through the central channel of the expansion body from the threaded end 2 side. The end of the rivet core 1 is clamped with a rivet gun or other pulling tool. The rivet gun is started to apply a strong axial pulling force to the rivet core 1. This pulling force is transmitted through the locking end 3, so that the entire expansion body is subjected to a reaction force in the direction of the tool. Under the continuous action of this pulling force, the conical or spherical expansion head 6 is pulled into the internal cavity of the expansion end 5.

[0042] When the expansion head 6 enters the expansion end 5, its inclined structure generates a radially outward expansion force on the inner wall of the expansion end 5, forcing the expansion end 5 to undergo elastic or micro-plastic deformation, thereby expanding radially and tightly pressing the inner wall of the through hole of the plate to form a firm locking effect. At this time, the clamping plate 4 provides support on the other side of the plate and, together with the expanded expansion end 5, clamps the plate. After locking is completed, the threaded end 2 is loosened and the rivet core rod 1 is pulled out from the expansion body, leaving only the expansion body in the hole of the plate, thus completing the connection.

[0043] When disassembly is required, use a special tool, such as a puller, to hold the pull-out end 7 and apply an axial pull force to the pull-out end 7 in the same direction as the pull force during installation. At the same time, to release the expansion state, a wrench can be used to rotate in the opposite direction to reinsert or retain the threaded end 2 of the rivet core rod 1 in the structure. The reverse rotation of the rivet core rod 1 will drive the structure at its end, generating a force that moves the expansion head 6 in the installation direction, i.e., it will withdraw from the inside of the expansion end 5. When the expansion head 6 withdraws from the expansion end 5, the radial expansion force on the expansion end 5 disappears. It is made of high-elasticity aluminum alloy material and has good shape memory function, which will produce elastic rebound and radial dimension shrinkage, restoring or approaching its original diameter. At this time, the clamping force between the expansion body and the plate hole wall is released. Continue to pull the pull-out end 7, and the entire rivet expansion body can be easily removed from the plate hole, achieving non-destructive disassembly.

[0044] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A detachable rivet, comprising a rivet core (1), an expansion end (5), and a pull-out end (7), characterized in that: One end of the rivet core rod (1) is fixed with a threaded end (2), and a locking end (3) is installed on the outer side of the top of the rivet core rod (1). The bottom of the locking end (3) is fixedly connected with a locking plate (4). The card hole end (3) is provided with a telescopic end (8) and an expansion end (5) in sequence at the axial position. An expansion head (6) is provided at the end of the expansion end (5) away from the telescopic end (8). A pull-out end (7) is fixedly connected to the end of the expansion head (6).

2. The detachable rivet according to claim 1, characterized in that: One end of the telescopic end (8) is telescopically inserted into the card hole end (3), and the other end is telescopically inserted into the expansion end (5).

3. The detachable rivet according to claim 1, characterized in that: The insertion points of the card hole end (3) and the telescopic end (8), as well as the insertion points of the expansion end (5) and the telescopic end (8), are all provided with limiting structures to prevent relative rotation between the two. The limiting structures are mutually cooperating keys and keyways provided on the insertion surface.

4. The detachable rivet according to claim 1, characterized in that: The telescopic end (8) has a plurality of docking holes (10) spaced apart along its axial direction on its pipe wall, and the expansion end (5) has a positioning hole (9) on its pipe wall. A positioning pin (11) is detachably inserted into the positioning hole (9) and a selected docking hole (10) so that the telescopic end (8) and the expansion end (5) are fixed relative to each other.

5. The detachable rivet according to claim 4, characterized in that: The outer peripheral wall of the positioning pin (11) is fitted with an elastic rubber ring.

6. The detachable rivet according to claim 1, characterized in that: The cross-sectional dimension of the pull-out end (7) is larger than the mounting through hole on the plate, and its exposed end is provided with a groove or flange for cooperating with the disassembly tool.

7. The detachable rivet according to claim 1, characterized in that: The expansion head (6) is a component made of highly elastic aluminum alloy material, and the expansion head (6) is a spherical head.

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