Double-lock single-drum rivet

Abstract

The utility model relates to the technical field of rivets, in particular to a double-lock single-drum rivet. A double-lock single-drum rivet comprises a rivet core, a rivet shell and a lock plate, the rivet core comprises a rivet core body, a snapping section, a riveting section and a rivet head, the snapping section is connected between the rivet core body and the riveting section, and the rivet head is connected to the end, away from the rivet core body, of the riveting section; the nail shell comprises a nail shell body and a nail cap, the nail cap is connected to the end of the nail shell body, the nail cap protrudes in the circumferential direction of the nail shell body, and a first through hole is formed in the nail shell body in the length direction of the nail shell body in a penetrating mode. According to the double-lock single-drum rivet, after riveting, the rivet core can achieve the effect of clamping the head and the tail, so that the riveted rivet keeps high and stable clamping force, the anti-seismic and anti-loosening effects are good, the high anti-seismic and anti-loosening capacity is achieved, and the problems that an existing single-drum rivet is poor in clamping force and poor in anti-seismic and anti-loosening effect after riveting are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of rivets, in particular to a double-lock single-drum rivet. Background Art

[0002] Rivets are a type of fastener, and they are one of the important basic parts of various types of mechanical equipment. As an important fastener, single-drum rivets play an indispensable role in various fields. After the single-drum rivet is riveted, the rivet core presses the end of the rivet shell to deform it and form a bulging structure, thereby clamping the two workpieces to be fixed. In existing single-drum rivets, the rivet core after being pulled apart usually only relies on the nail head at the head of the rivet core to achieve clamping with the rivet shell, that is, only the head of the rivet core can be clamped, and the tail of the rivet core cannot be locked. Therefore, the existing single-drum rivets have poor clamping force after riveting, and poor anti-seismic and anti-loosening effects. Utility Model Content

[0003] In view of the problems raised by the background technology, the purpose of the utility model is to propose a double-lock single-drum rivet. After riveting, the nail core can achieve the effect of clamping both the head and the tail, so that the rivet after riveting maintains a higher and more stable clamping force, good shock resistance and anti-loosening effect, and has a higher shock resistance and relaxation ability, which solves the problems of poor clamping force, shock resistance and anti-loosening effect of existing single-drum rivets after riveting.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] A double-lock single-drum rivet, comprising a nail core, a nail shell and a locking piece, wherein the nail core comprises a nail core body, a breaking section, a riveting section and a nail head, wherein the breaking section is connected between the nail core body and the riveting section, and the nail head is connected to the end of the riveting section away from the nail core body;

[0006] The nail shell comprises a nail shell body and a nail cap, wherein the nail cap is connected to the end of the nail shell body, the nail cap is arranged to protrude along the circumference of the nail shell body, the interior of the nail shell body is provided with a first through hole penetrating along its length direction, the end of the nail cap away from the nail shell body is provided with a countersunk hole, the first through hole extends to the interior of the nail cap and is connected to the countersunk hole;

[0007] A second through hole is formed through the middle of the locking piece;

[0008] When the nail core, the nail shell and the locking plate are assembled, the nail core body passes through the first through hole and the countersunk hole in sequence, the nail head abuts against the end surface of the nail shell body away from the nail cap, the nail core body passes through the second through hole so that the locking plate is sleeved on the nail core body, and the locking plate is embedded in the countersunk hole.

[0009] Optionally, the countersunk hole comprises a mounting hole and a locking hole which are connected to each other, and the mounting hole is connected to a side of the locking hole away from the nail shell body;

[0010] The cross-sectional shape of the locking hole along the length direction of the nail shell is trapezoidal, and the cross-sectional width of the locking hole close to the nail shell body is smaller than the cross-sectional width of the locking hole close to the mounting hole;

[0011] When the locking piece is embedded in the countersunk hole, the outer wall of the locking piece fits with the wall surface of the mounting hole.

[0012] Optionally, the locking piece includes a mounting portion and matching portions arranged at both ends of the mounting portion, the mounting hole is circular in shape, the mounting portion is columnar in shape, the outer wall of the matching portion is inclined, and the shape of the matching portion close to the locking hole matches the shape of the locking hole;

[0013] When the locking piece is embedded in the countersunk hole, the outer wall of the mounting portion fits with the wall surface of the mounting hole.

[0014] Optionally, the outer circumferential surface of the nail core body is provided with vertical teeth, the vertical teeth are arranged along the length direction of the nail core body, and the vertical teeth are distributed at intervals along the circumference of the nail core body;

[0015] When the locking piece is sleeved on the nail core body, the vertical teeth abut against the wall surface of the second through hole.

[0016] Optionally, the outer circumferential surface of the riveted section is provided with a first annular convex pattern, the first annular convex pattern is arranged around the outer circumferential surface of the riveted section, and the first annular convex patterns are distributed at intervals along the length direction of the riveted section, and an annular groove is provided between two adjacent first annular convex patterns;

[0017] The first through hole includes a first inner hole and a second inner hole which are connected to each other, the second inner hole is arranged close to the nail cap, and the diameter of the first inner hole is larger than the diameter of the second inner hole;

[0018] When the nail core and the nail shell are riveted together, the first annular convex pattern is interference-fitted with the wall surface of the second inner hole and the wall surface of the second through hole.

[0019] Optionally, the outer circumferential surface of the nail core body is also provided with a second annular convex pattern, the second annular convex pattern is arranged around the outer circumferential surface of the nail core body, and the second annular convex pattern is distributed at intervals along the length direction of the nail core body, and the second annular convex pattern is arranged at one end of the nail core body away from the nail head.

[0020] Optionally, the nail cap is bowl-shaped and is provided with an abutment surface, the abutment surface being used to abut against a surface of a workpiece to be fixed, and when the nail core is assembled with the nail shell, the abutment surface is arranged toward the nail head.

[0021] Optionally, the nail shell body is cylindrical.

[0022] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0023] By providing a locking plate and a countersunk hole at the nail cap, the locking plate is embedded in the countersunk hole. When the riveting tool is working, the nail core is pulled, and at the same time, the locking plate is filled between the riveting section and the nail cap under the interaction of the nail core and the riveting tool, so that the tail of the riveted section can also be locked. In the riveted structure, not only can the nail head clamp the end of the nail shell body at the head of the nail core, but it can also be locked at the tail of the riveted section through the locking plate, so that the nail core can achieve the effect of clamping both the head and the tail after riveting, so that the rivet after riveting maintains a higher and more stable clamping force, has a higher shock resistance and anti-loosening ability, and solves the problems of poor clamping force, shock resistance and anti-loosening effect of existing single-drum rivets after riveting. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The utility model is a schematic structural diagram of the assembly of the nail core, the nail shell and the locking plate of the double-lock single-drum rivet in one embodiment.

[0025] Figure 2 The utility model is a schematic structural diagram of a double-lock single-drum rivet core.

[0026] Figure 3 The utility model is a schematic structural diagram of a double-lock single-drum rivet core.

[0027] Figure 4 yes Figure 3 Enlarged structural diagram at point A.

[0028] Figure 5 It is a cross-sectional view of a nail shell of a double-lock single-drum rivet according to an embodiment of the utility model.

[0029] Figure 6 It is a cross-sectional view of a locking plate of a double-lock single-drum rivet according to an embodiment of the utility model.

[0030] Figure 7 It is a structural schematic diagram of an embodiment of the utility model in which an assembled double-lock single-drum rivet is passed through preset holes of two workpieces to be fixed.

[0031] Figure 8 It is a partial cross-sectional view of a double-lock single-drum rivet after riveting is completed in one embodiment of the utility model.

[0032] Among them: nail core 1, nail core body 11, vertical teeth 111, second annular convex pattern 112, breaking section 12, riveting section 13, first annular convex pattern 131, annular groove 132, nail head 14, nail shell 2, nail shell body 21, first through hole 211, first inner hole 2111, second inner hole 2112, nail cap 22, countersunk hole 221, mounting hole 2211, locking hole 2212, abutting surface 222, locking piece 3, second through hole 31, mounting portion 32, matching portion 33, workpiece 10. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features, and are used to distinguish and describe features, without distinction of order or importance.

[0035] like Figures 1 to 8 As shown, a double-lock single-drum rivet comprises a nail core 1, a nail shell 2 and a locking piece 3, wherein the nail core 1 comprises a nail core body 11, a breaking section 12, a riveting section 13 and a nail head 14, wherein the breaking section 12 is connected between the nail core body 11 and the riveting section 12, and the nail head 14 is connected to the end of the riveting section 12 away from the nail core body 11;

[0036] The nail shell 2 includes a nail shell body 21 and a nail cap 22, wherein the nail cap 22 is connected to the end of the nail shell body 21, and the nail cap 22 is arranged to protrude along the circumference of the nail shell body 21. The interior of the nail shell body 21 is provided with a first through hole 211 along its length direction, and the end of the nail cap 22 away from the nail shell body 21 is provided with a countersunk hole 221, and the first through hole 211 extends to the interior of the nail cap 22 and is connected to the countersunk hole 221;

[0037] A second through hole 31 is formed in the middle of the locking piece 3;

[0038] When the nail core 1, the nail shell 2 and the locking plate 3 are assembled, the nail core body 11 passes through the first through hole 211 and the countersunk hole 221 in sequence, the nail head 14 abuts against the end surface of the nail shell body 21 away from the nail cap 22, the nail core body 11 passes through the second through hole 31 so that the locking plate 3 is sleeved on the nail core body 11, and the locking plate 3 is embedded in the countersunk hole 221.

[0039] When using the double-lock single-drum rivet, first pass the nail core body 11 through the first through hole 211 and the countersunk hole 221 in sequence, stamp the nail shell 2 so that the nail shell 2 wraps the nail core 1, and then install the locking plate 3, pass the nail core body 11 through the second through hole 31 so that the locking plate 3 is sleeved on the nail core body 11, and the locking plate 3 is embedded and fixed in the countersunk hole 221, completing the assembly of the nail core 1, the nail shell 2 and the locking plate 3 (because the rivet section 13 is pressed tightly under the action of the nail head 14 at this time, so that The riveting section 13 is compressed and shrunk to bulge slightly outward), and then the assembled double-lock single-drum rivet is passed through the preset holes of the two workpieces 10 to be fixed, and riveting is performed by a riveting tool such as a nail gun. During the riveting process, the end of the nail shell body 21 bulges outward under the pressure of the nail head 14 to form a bulging structure, and the nail core 1 is continued to be pulled. Since the nail shell body 21 cannot continue to deform, the nail head 14 abuts against the end of the nail shell body 21, and finally the nail core 1 is broken at the breaking section 12, forming a firm riveting to the workpiece.

[0040] By providing the locking plate 3 and the countersunk hole 221 at the nail cap 22, the locking plate 3 is embedded in the countersunk hole 221. When the riveting tool is working, the nail core 1 is pulled, and at the same time, the locking plate 3 is filled between the riveting section 13 and the nail cap 22 under the interaction between the nail core 1 and the riveting tool, so that the tail of the riveting section 13 can also be locked, so that in the riveted structure, not only the nail head 14 can clamp the end of the nail shell body 21 at the head of the nail core 1, but also the locking plate 3 can be used to lock the tail of the riveted section 13, so that after riveting, the nail core 1 can achieve the effect of clamping both the head and the tail, so that the rivet after riveting maintains a higher and more stable clamping force, has a higher anti-seismic and anti-loosening ability, and solves the problems of poor clamping force, anti-seismic and anti-loosening effects of the existing single-drum rivets after riveting.

[0041] like Figure 5 and Figure 6As shown, it is further explained that the countersunk hole 221 includes a mounting hole 2211 and a locking hole 2212 which are connected to each other, and the mounting hole 2211 is connected to a side of the locking hole 2212 away from the nail shell body 21;

[0042] The cross-sectional shape of the locking hole 2212 along the length direction of the nail shell 2 is trapezoidal, and the cross-sectional width of the locking hole 2212 close to the nail shell body 21 is smaller than the cross-sectional width of the locking hole 2212 close to the mounting hole 2211;

[0043] When the locking piece 3 is embedded in the counterbore 221 , the outer wall of the locking piece 3 fits with the wall surface of the mounting hole 2211 .

[0044] By setting the mounting hole 2211 and the locking hole 2212, when the locking plate 3 is embedded in the countersunk hole 221, the outer wall of the locking plate 3 fits with the wall surface of the mounting hole 2211, which is convenient for installing the locking plate 3, and the locking hole 2212 is trapezoidal in shape, and the cross-sectional width of the locking hole 2212 close to the nail shell body 21 is smaller than the cross-sectional width of the locking hole 2212 close to the mounting hole 2211. During riveting, the locking plate 3 is filled between the riveting section 13 and the nail cap 22 under the interaction between the nail core 1 and the riveting tool, and at this time, the locking plate 3 is filled in the locking hole 2212 with a taper, and under the shrinkage effect of the taper and the extrusion effect of the riveting tool, the second through hole 31 of the locking plate 3 shrinks and fills in the locking hole 2212, effectively locking the tail end of the riveting section 13.

[0045] Further, the locking piece 3 includes a mounting portion 32 and matching portions 33 disposed at both ends of the mounting portion 32, the mounting hole 2211 is circular in shape, the mounting portion 32 is columnar in shape, the outer wall of the matching portion 33 is inclined, and the shape of the matching portion 33 close to the locking hole 2212 matches the shape of the locking hole 2212;

[0046] When the locking piece 3 is embedded in the counterbore 221 , the outer wall of the mounting portion 32 fits with the wall surface of the mounting hole 2211 .

[0047] By providing the mounting portion 32 on the locking plate 3, the shape of the mounting portion 32 is adapted to the shape of the mounting hole 2211, so that the locking plate 3 can be more smoothly filled into the locking hole 2212, and the outer wall of the matching portion 33 is inclined, and the shape of the matching portion 33 close to the locking hole 2212 matches the shape of the locking hole 2212, so that when the locking plate 3 is filled in the locking hole 2212, it can fit the locking hole 2212 more closely, thereby further ensuring a stable clamping force.

[0048] Specifically, when the locking plate 3 is embedded in the countersunk hole 221, part of the outer wall of the mounting portion 32 is in contact with the wall of the mounting hole 2211, and part of the outer wall of the mounting portion 32 is exposed. When the riveting tool is working, the nail core 1 is pulled, and at the same time, the locking plate 3 moves along the mounting portion 32 into the locking hole 2212 under the interaction between the nail core 1 and the riveting tool, so that the locking plate 3 fills the gap between the riveting section 13 and the locking hole 2212, so that the tail of the riveting section 13 can also apply a clamping force to the nail cap 22 through the locking plate 3, thereby effectively improving the clamping effect of the tail of the riveting section 13 on the workpiece, so that the rivet after riveting maintains a higher and more stable clamping force.

[0049] like Figure 1 As shown, preferably, the outer circumferential surface of the nail core body 11 is provided with vertical teeth 111, and the vertical teeth 111 are arranged along the length direction of the nail core body 11, and the vertical teeth 111 are distributed at intervals along the circumference of the nail core body 11;

[0050] When the locking piece 3 is sleeved on the nail core body 11 , the vertical teeth 111 abut against the wall surface of the second through hole 31 .

[0051] By providing the vertical teeth 111, the diameter of the nail core body 11 can be increased, so that when the locking piece 3 is sleeved on the nail core body 11, the vertical teeth 111 abut against the wall of the second through hole 31, thereby ensuring that the locking piece 3 can be tightly combined with the nail core body 11 after assembly, thereby preventing the locking piece 3 from separating and falling off from the nail core body 11.

[0052] like Figure 2 , Figure 3 , Figure 4 and Figure 8 As shown, it is further explained that the outer circumference of the riveted section 13 is provided with a first annular convex pattern 131, the first annular convex pattern 131 is arranged around the outer circumference of the riveted section 13, and the first annular convex pattern 131 is spaced apart along the length direction of the riveted section 13, and an annular groove 132 is provided between two adjacent first annular convex patterns 131;

[0053] The first through hole 211 includes a first inner hole 2111 and a second inner hole 2112 that are connected to each other. The second inner hole 2112 is disposed close to the nail cap 22. The diameter of the first inner hole 2111 is greater than the diameter of the second inner hole 2112.

[0054] When the nail core 1 and the nail shell 2 are riveted together, the first annular convex pattern 131 is interference-fitted with the wall surface of the second inner hole 2112 and the wall surface of the second through hole 31 .

[0055] By providing the first annular convex pattern 131 on the riveting section 13, and since the annular groove 132 is provided between two adjacent first annular convex patterns 131, the nail shell 2 adopts a stepped inner hole structure. During the riveting process, the nail core 1 squeezes the second inner hole 2112, and the second inner hole 2112 with a smaller diameter in the nail core 1 plays a role of guiding and increasing the shear resistance, which is more conducive to the material of the nail shell 2 being embedded in the annular groove 132, so that the nail shell 2 and the nail core 1 form a small amount of interference fit, further improving the connection tightness between the nail core 1 and the nail shell 2, and ensuring that the nail core 1 is stuck in the nail shell 2 after riveting and will not fall off.

[0056] In addition, the locking plate 3 is filled in the tapered locking hole 2212 under the interaction of the nail core 1 and the riveting tool. The shrinkage effect of the taper and the squeezing effect of the riveting tool cause the second through hole 31 of the locking plate 3 to shrink and fill in the annular groove 132, thereby locking the tail end of the riveting section 13.

[0057] Preferably, the nail core 1 is processed by a cold heading machine, and the breaking section 12 is formed by thread rolling, so as to ensure that the breaking force of the nail core 1 is balanced and consistent and the breaking position is consistent, thereby improving the quality of the rivet.

[0058] Further, the outer circumferential surface of the nail core body 11 is also provided with a second annular convex pattern 112, the second annular convex pattern 112 is arranged around the outer circumferential surface of the nail core body 11, and the second annular convex pattern 112 is spaced apart along the length direction of the nail core body 11, and the second annular convex pattern 112 is arranged at one end of the nail core body 11 away from the nail head 14.

[0059] By providing the second annular convex pattern 112 on the nail core body 11 , it is convenient for the nail core 1 to mesh with the gripping part of the riveting tool, thereby avoiding sliding during riveting and improving work efficiency.

[0060] like Figure 5 As shown, preferably, the nail cap 22 is bowl-shaped and is provided with a contact surface 222 , wherein the contact surface 222 is used to contact the surface of the workpiece 10 to be fixed, and when the nail core 1 is assembled with the nail shell 2 , the contact surface 222 is arranged toward the nail head 14 .

[0061] By setting the nail cap 22 into a bowl shape and by setting the abutment surface 222 on the nail cap 22, since the abutment surface 222 abuts against the surface of the workpiece 10 to be fixed, when the riveting is completed, the abutment surface 222 is tightly combined with the surface of the workpiece 10, effectively ensuring the stability of the riveted structure.

[0062] Preferably, the nail shell body 21 is cylindrical.

[0063] By setting the shape of the nail shell body 21 to be cylindrical, it is convenient to insert the nail shell 2 into the preset hole of the workpiece 10 to be fixed, thereby effectively improving the assembly efficiency of the nail shell 2 and the nail core 1 and the overall efficiency of the riveting process.

[0064] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A double-lock single-drum rivet, characterized in that: The nail core comprises a nail core, a nail shell and a locking piece, wherein the nail core comprises a nail core body, a breaking section, a riveting section and a nail head, wherein the breaking section is connected between the nail core body and the riveting section, and the nail head is connected to the end of the riveting section away from the nail core body; The nail shell comprises a nail shell body and a nail cap, wherein the nail cap is connected to the end of the nail shell body, the nail cap is arranged to protrude along the circumference of the nail shell body, the interior of the nail shell body is provided with a first through hole penetrating along its length direction, the end of the nail cap away from the nail shell body is provided with a countersunk hole, the first through hole extends to the interior of the nail cap and is connected to the countersunk hole; A second through hole is formed through the middle of the locking piece; When the nail core, the nail shell and the locking plate are assembled, the nail core body passes through the first through hole and the countersunk hole in sequence, the nail head abuts against the end surface of the nail shell body away from the nail cap, the nail core body passes through the second through hole so that the locking plate is sleeved on the nail core body, and the locking plate is embedded in the countersunk hole.

2. The double-lock single-drum rivet according to claim 1, characterized in that: The countersunk hole comprises a mounting hole and a locking hole which are connected to each other, and the mounting hole is connected to a side of the locking hole which is away from the nail shell body; The cross-sectional shape of the locking hole along the length direction of the nail shell is trapezoidal, and the cross-sectional width of the locking hole close to the nail shell body is smaller than the cross-sectional width of the locking hole close to the mounting hole; When the locking piece is embedded in the countersunk hole, the outer wall of the locking piece fits with the wall surface of the mounting hole.

3. The double-lock single-drum rivet according to claim 2, characterized in that: The locking piece includes a mounting portion and matching portions arranged at both ends of the mounting portion, the mounting hole is circular in shape, the mounting portion is columnar in shape, the outer wall of the matching portion is inclined, and the shape of the matching portion close to the locking hole matches the shape of the locking hole; When the locking piece is embedded in the countersunk hole, the outer wall of the mounting portion fits with the wall surface of the mounting hole.

4. The double-lock single-drum rivet according to claim 1, characterized in that: The outer circumferential surface of the nail core body is provided with vertical teeth, the vertical teeth are arranged along the length direction of the nail core body, and the vertical teeth are distributed at intervals along the circumferential direction of the nail core body; When the locking piece is sleeved on the nail core body, the vertical teeth abut against the wall surface of the second through hole.

5. The double-lock single-drum rivet according to claim 1, characterized in that: The outer circumferential surface of the riveted section is provided with a first annular convex pattern, the first annular convex pattern is arranged around the outer circumferential surface of the riveted section, and the first annular convex patterns are distributed at intervals along the length direction of the riveted section, and an annular groove is provided between two adjacent first annular convex patterns; The first through hole includes a first inner hole and a second inner hole which are connected to each other, the second inner hole is arranged close to the nail cap, and the diameter of the first inner hole is larger than the diameter of the second inner hole; When the nail core and the nail shell are riveted together, the first annular convex pattern is interference-fitted with the wall surface of the second inner hole and the wall surface of the second through hole.

6. The double-lock single-drum rivet according to claim 1, characterized in that: The outer circumference of the nail core body is also provided with a second annular convex pattern, which is arranged around the outer circumference of the nail core body and is spaced apart along the length direction of the nail core body. The second annular convex pattern is arranged at one end of the nail core body away from the nail head.

7. The double-lock single-drum rivet according to claim 1, characterized in that: The nail cap is bowl-shaped and is provided with an abutment surface, which is used to abut against the surface of a workpiece to be fixed. When the nail core is assembled with the nail shell, the abutment surface is arranged toward the nail head.

8. The double-lock single-drum rivet according to claim 1, characterized in that: The nail shell body is cylindrical.

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