CN216407423U - Rivet - Google Patents

Abstract

The utility model provides a rivet, which comprises a rivet sleeve and a rivet rod, wherein the rivet rod comprises a tail part, a rivet head and a middle part between the tail part and the rivet head, the middle part comprises a snapping part and a riveting part, the riveting part is arranged between the snapping part and the rivet head, and the riveting part comprises a plurality of grooves which are arranged along the circumferential direction of the rivet rod; the unitary tack sleeve having an internal bore includes a base portion and a body portion adjacent to the base portion, the cylindrical body portion having a first set of depressions disposed thereon, the first set of depressions including a plurality of first depressions, and the plurality of first depressions being spaced apart a uniform distance circumferentially of the body portion. After the rivet is riveted, the main body part of the rivet sleeve is enabled to bulge outwards and is also tightly attached to the groove of the riveting part of the middle part of the rivet rod, so that the riveting tightness is enhanced, and the waterproof and moistureproof effects are enhanced. The close fit also effectively prevents the nail shank from rebounding in fracture.

Description

Rivet

Technical Field

The utility model relates to a rivet.

Background

Rivets are a widely used fastener for joining articles of different hardness and material.

In the riveting process of the rivet, the rivet is fixedly connected with parts to be riveted together by utilizing self deformation or interference connection under the external force action of a rivet gun, the common rivet on the market at present mainly comprises an R-shaped rivet, a self-plugging rivet, a pull rivet and the like, the pull rivet generally comprises a rivet rod and a rivet sleeve, the rivet rod is subjected to pull riveting through the rivet gun, and the rivet sleeve is expanded and deformed to realize the riveting purpose.

The current common blind rivets comprise double-drum rivets which clamp two structural parts to be riveted together by drawing the sleeve of the rivet into a double-drum shape in order to reduce the pressure on the surface of the structural parts. However, such a rivet cannot achieve waterproof sealing when applied in environments such as under water.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present invention provides a rivet, which comprises a sleeve and a shank, wherein the shank comprises a tail part, a head and a middle part between the tail part and the head, the middle part comprises a snapping part and a riveting part, the riveting part is arranged between the snapping part and the head, and the riveting part comprises a plurality of grooves arranged along the circumferential direction of the shank; the unitary tack sleeve having an internal bore includes a base portion and a body portion adjacent to the base portion, the cylindrical body portion having a first set of depressions disposed thereon, the first set of depressions including a plurality of first depressions, and the plurality of first depressions being spaced apart a uniform distance circumferentially of the body portion.

Further, a second set of depressions is disposed on the body portion of the sleeve and is axially spaced from the first set of depressions, the second set of depressions comprising a plurality of second depressions, and the plurality of second depressions are spaced the same distance apart circumferentially of the body portion.

Further, the snap-off portion has a cross-section that tapers in the direction of the head.

Further, the plurality of grooves of the rivet portion are axially spaced apart by the same distance.

Further, the groove is in a U shape or an arc shape when viewed from the cross section of the nail rod.

Further, the first set of recesses includes 4 first recesses.

Further, the first recess has a V-shaped or trapezoidal profile.

Further, the ratio of the depth of the first recess to the thickness of the body portion of the tack sleeve is 0.1-0.6.

Further, the ratio of the opening width of the first recess to the depth of the first recess is 0.75-1.25.

After the rivet is riveted, the main body part of the rivet sleeve is enabled to bulge outwards and is also tightly attached to the groove of the riveting part of the middle part of the rivet rod, and the riveting tightness is enhanced by the design, so that the waterproof and moistureproof effects are enhanced. The close fit also effectively prevents the nail shank from rebounding in fracture.

Drawings

The utility model will be discussed in more detail on the basis of exemplary embodiments in the figures, in which:

FIG. 1 shows a top view of a rivet in an assembled state according to an embodiment;

FIG. 2 shows a top view of a shank of a rivet according to an embodiment;

FIG. 3 illustrates a cross-sectional view of a sleeve of a rivet according to an embodiment;

FIG. 4 illustrates a cross-sectional view of a rivet before riveting according to an embodiment;

FIG. 5 shows a cross-sectional view of the rivet according to FIG. 4 during riveting;

FIG. 6 shows a partial cross-sectional view of the rivet according to FIG. 4 after riveting is completed;

fig. 7 shows an enlarged view at position B in fig. 6.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the utility model, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 shows a top view of a rivet 1 according to an embodiment in an assembled state. As shown in fig. 1, the rivet 1 of the present invention includes a sleeve 10 and a shank 20, and the sleeve 10 may be coaxially assembled with the shank 20. The rivet 1 may be made of an aluminum alloy.

Fig. 2 shows a top view of the shank 20 of the rivet 1 according to an embodiment. As shown in FIG. 2, the stem 20 of the present invention includes a tail 210, a head 230, and a middle portion 220 between the tail 210 and the head 230. After the sleeve 10 and the shank 20 of the rivet 1 are completely engaged, the head 230 of the shank 20 of the rivet 1 will first enter the hole to be fixed. In the embodiment shown in fig. 2, the stud 230 has a cylindrical portion 231 and a stud end 232, the stud end 232 having a curved profile. The tail 210 of the shank 20 of the rivet 1 has a frustoconical shape.

The middle part 220 of the shank 20 of the rivet 1 is connected to the tail 210 and to the cylindrical part 231 of the head 230, the middle part 220 comprising a snap-off portion 222, the snap-off portion 222 being intended to cause the shank 20 of the rivet 1 under the action of the rivet gun to be snapped off to complete the riveting. The snap-off portion 222 may have a cross-section that tapers toward the head 230, and in other embodiments the snap-off portion 222 may also have a cross-section that tapers toward the tail 210. The minimum diameter of the snap-off portion 222 is at least one-third of its maximum diameter.

The intermediate section 220 includes a riveted section 224 disposed between the snap-off section 222 and the stud 230, the riveted section 224 including a plurality of recesses 2241 disposed along the circumference of the stem 20, the plurality of recesses 2241 being axially spaced apart by the same distance. In other embodiments, the plurality of grooves 2241 may be axially spaced by zero, i.e., two consecutive grooves 2241 are adjacently disposed. The grooves are "U" shaped or arc-shaped when viewed in cross-section of the shank 20.

Fig. 3 shows a cross-sectional view of the sleeve 10 of the rivet 1 according to an embodiment. As shown in FIG. 3, the sleeve 10 of the present invention is unitary and, for purposes of clarity, the sleeve 10 includes a base portion 110, a body portion 120 adjacent to the base portion 110. The sleeve 10 also includes an internal bore 150, the bore 150 extending through the base portion 110 and the body portion 120. The cylindrical body portion 120 is provided with a first set of recesses, which includes a plurality of first recesses 130, and the plurality of first recesses 130 are spaced apart at the same distance in the circumferential direction of the body portion 120. Fig. 3 shows an embodiment in which the first set of recesses includes 4 first recesses 130 that are equally circumferentially spaced, but in other embodiments the first set of recesses may include 3, 5, 6, and 8 first recesses that are equally circumferentially spaced. The first recess 130 has a V-shaped or trapezoidal profile. The ratio of the depth of the first recess 130 to the thickness of the body portion 120 of the sleeve 10 is 0.1-0.6, preferably 0.2-0.5, more preferably 0.25. The ratio of the opening width of the first recess 130 to the depth thereof is 0.75 to 1.25, preferably 0.8 to 1.0, and more preferably 0.9.

The cylindrical body portion 120 may also be provided with a second set of depressions axially spaced from the first set of depressions, the second set of depressions including a plurality of second depressions 140, and the plurality of second depressions 140 being circumferentially spaced the same distance apart along the body portion 120. Fig. 3 shows an embodiment in which the second set of recesses includes 4 second recesses 140 that are equally circumferentially spaced, but in other embodiments the second set of recesses may include 3, 5, 6, and 8 second recesses that are equally circumferentially spaced. The second recess 140 has a V-shaped or trapezoidal profile. The ratio of the depth of the second recess 140 to the thickness of the body portion 120 of the tack sleeve 10 is 0.1 to 0.6, preferably 0.2 to 0.5, more preferably 0.25. The ratio of the opening width of the second recess 140 to the depth thereof is 0.75 to 1.25, preferably 0.8 to 1.0, and more preferably 0.9.

The base portion 110 of the sleeve 10 of the rivet 1 has a flat end face, a cylindrical side face and an arcuate outer surface, the end face of the base portion 110 being intended to come into contact with the part to be fastened, thus providing a supporting function.

The internal bore 150 of the sleeve 10 is designed so that the middle portion 220 of the shank 20 of the rivet 1 can be interfitted with the internal bore 150 of the sleeve 10. In the embodiment shown in fig. 3, the internal bore 150 is enlarged in a portion of the base portion 110.

Fig. 4 shows a cross-sectional view of a rivet 1 according to an embodiment before riveting. In this embodiment, the rivet 1 is used to rivet the first and second articles 6 and 8. When the rivet 1 is inserted into the holes of the first and second products 6 and 8, the flat end face of the base portion 110 of the sleeve 10 of the rivet 1 abuts against the first product 6, and the first product 6 abuts against the second product 8.

Fig. 5 shows a cross-sectional view of the rivet 1 according to fig. 4 during riveting. After the rivet is placed into the holes of the first and second pieces 6, 8, the tail of the shank 20 and a portion of the intermediate portion 220 of the rivet 1 are gripped by the rivet gun so that the shank 20 is applied with a force in a direction (as indicated by arrow a) from the head 230 of the shank 20 to the tail 210. The head 230 will move towards the tail 210 under the force applied by the riveter so that the head 230 enters the body portion 120 of the sleeve 10, whereupon the body portion 120 of the sleeve 10 will deform (i.e. bulge) and the degree of bulging of the body portion 120 will vary.

Fig. 6 shows a partial cross-sectional view of the rivet 1 according to fig. 4 after riveting is completed, and fig. 7 shows an enlarged view at position B in fig. 6. As can be seen from fig. 6 and 7, after the riveting is completed, the main body part 120 of the nail sleeve 10 is bulged outwards and is tightly fitted into the groove 2241 of the riveting part 224 of the middle part 220 of the nail stem 20, and the design enhances the sealing performance of the riveting, thereby enhancing the waterproof and moistureproof effects. The close fit also effectively prevents the nail shank from breaking back.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. A rivet comprises a rivet sleeve and a rivet rod, and is characterized in that,

the nail rod comprises a tail part, a nail head and a middle part between the tail part and the nail head, the middle part comprises a breaking part and a riveting part, the riveting part is arranged between the breaking part and the nail head, the riveting part comprises a plurality of grooves arranged along the circumferential direction of the nail rod,

the unitary tack sleeve having an internal bore includes a base portion and a body portion adjacent to the base portion, the cylindrical body portion having a first set of depressions disposed thereon, the first set of depressions including a plurality of first depressions, and the plurality of first depressions being spaced apart a uniform distance circumferentially of the body portion.

2. A rivet according to claim 1, wherein a second set of depressions is further provided on the body portion of the sleeve, axially spaced from the first set of depressions, the second set of depressions comprising a plurality of second depressions, and the plurality of second depressions being spaced apart the same distance circumferentially of the body portion.

3. A rivet according to claim 1, wherein the fractured portion has a cross section which becomes gradually smaller toward the head.

4. A rivet according to claim 1, wherein the plurality of grooves of the rivet portion are axially spaced by the same distance.

5. Rivet according to claim 1, characterized in that the groove is "U" shaped or arc-shaped when viewed in cross section of the shank.

6. Rivet according to claim 1, characterized in that the first set of depressions comprises 4 first depressions.

7. Rivet according to claim 1, characterized in that the first recess has a V-shaped or trapezoidal profile.

8. Rivet according to claim 7, characterized in that the ratio of the depth of the first recess to the thickness of the body part of the sleeve is 0.1-0.6.

9. Rivet according to claim 8, characterized in that the ratio of the opening width of the first recess to the depth of the first recess is 0.75-1.25.

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