Double-drum type self-plugging rivet for connecting automobile plastic parts

Abstract

The utility model discloses a double-drum type self-plugging rivet for connecting automobile plastic parts, which comprises a rivet body and a rivet core, the rivet body comprises a bulged part, a workpiece clamping part and a brim flange, the rivet core comprises a rivet head, a locking part and a traction part, the rivet body is provided with two first clamping marks at the bulged part, and the rivet body is provided with two second clamping marks at the brim flange. A plurality of second clamping marks are arranged at the position, close to the brim flange, of the workpiece clamping part at intervals, the two first clamping marks form double bumps after pull riveting, an annular protrusion is arranged at the position, close to the rivet head, of the locking part and used for being matched and locked with the riveted bumps, and a rivet breaking position is arranged below the annular protrusion. The second clamping mark inhibits bulking of the rod diameter part close to the brim flange, so that the rod diameter part is not in excessive contact with the plastic part, and the purpose of not exploding the plastic workpiece is achieved; the connection reliability of the rivet and a workpiece is guaranteed through the double-bulge structure, meanwhile, the annular protrusion of the rivet core and the bulges are matched and locked, the phenomenon that the rivet head falls off and loosens is prevented, and effective fastening riveting is provided for the workpiece.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a double-drum type core-pulling rivet for connecting automobile plastic parts. Background Art

[0002] With the improvement of living standards and the accelerated pace of life, cars have become an indispensable means of transportation in life. With the development of technology, there are more and more types of cars, which are very popular. The increase in vehicle speed and people's emphasis on safety have put forward higher requirements on vehicle manufacturing technology. There are many accessories on the car body, which are made of different materials and have various connection structures. The material and structure of the car body play a very important role in the safety performance of the vehicle.

[0003] Riveting structures are often used when connecting plastic parts of automobile bodies. At present, the commonly used rivet structures for connecting automobile plastic parts are: the spacing between the clamping marks of the rivet rod is designed to be wide, but because the strength and rigidity of the plastic parts themselves are relatively weak, when the opening of the riveted part is large, after riveting, due to internal bulging, the plastic parts are subjected to tensile stress, which causes the plastic parts to twist, deform, or even break, resulting in riveting failure. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in order to overcome the defect of the above prior art that the plastic parts are burst due to the internal bulging, a double-drum blind rivet for connecting automobile plastic parts is provided, which can provide effective riveting for the fastening parts.

[0005] The utility model adopts the following technical scheme to solve the technical problem: a double-drum type core-pulling rivet for connecting automobile plastic parts, comprising a rivet body and a nail core, wherein the rivet body comprises a bulging portion, a workpiece clamping portion and a brim flange, the nail core comprises a nail head, a locking portion and a traction portion, the rivet body is provided with two first clamping marks at the bulging portion, and a plurality of second clamping marks with close spacing are provided at the position of the workpiece clamping portion close to the brim flange, the two first clamping marks form a double bulge after riveting, the locking portion is provided with an annular protrusion close to the nail head for locking in cooperation with the bulge after riveting, and the lower part of the annular protrusion is provided with a nail breaking position.

[0006] Furthermore, the number of the second clippings is at least 3.

[0007] Furthermore, the width of the second clamping print is 0.3-0.5 mm, and the interval between adjacent clamping prints is 1.3-1.5 mm.

[0008] Furthermore, the second clamping width is set to 0.4 mm, and the interval between adjacent clamping prints is set to 1.4 mm.

[0009] Furthermore, the traction portion of the nail core is provided with a ring pattern connected to a riveting tool.

[0010] Furthermore, an upper punching hole for supporting a riveting tool is provided at the bottom of the brim flange.

[0011] Furthermore, the surface of the rivet body is plated with zinc-nickel alloy, and the coating thickness is 8-14um; the surface of the nail core is plated with blue-white zinc, and the coating thickness is more than 3um.

[0012] The double-drum blind rivet for connecting automobile plastic parts of the utility model has the following beneficial effects:

[0013] 1. Design multiple closely spaced clamps near the brim flange of the rivet body to ensure that after the bulging part bulges, the bulging of the rod diameter near the brim flange is suppressed so that it does not come into excessive contact with the plastic workpiece, thereby preventing the plastic workpiece from bursting;

[0014] 2. Provide effective fastening and riveting for the workpiece. The double-bulge structure ensures the reliability of the connection between the rivet and the workpiece. At the same time, the annular protrusion of the nail core cooperates with the bulge to lock it, preventing the nail head from falling off and loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 yes Figure 1 A schematic diagram of the front structure of

[0018] Figure 3 yes Figure 2 A schematic cross-sectional structure diagram of ;

[0019] Figure 4 This is a schematic diagram of the state after the rivet of the utility model is riveted to the plastic workpiece;

[0020] In the figure: 1. rivet body, 11. bulging part, 12. workpiece clamping part, 13. brim flange, 2. nail core, 21. nail head, 22. locking part, 23. traction part, 3. first clamping mark, 4. second clamping mark, 5. ring pattern, 6. ring-shaped protrusion, 7. nail breaking place, 8. upper punching hole, 9. plastic workpiece. DETAILED DESCRIPTION

[0021] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0022] like Figure 1-4A double-drum type blind rivet for connecting automobile plastic parts shown in the figure comprises a rivet body 1 and a nail core 2, wherein the rivet body 1 comprises a bulging portion 11, a workpiece clamping portion 12 and a brim flange 13, and the nail core 2 comprises a nail head 21, a locking portion 22 and a traction portion 23. The rivet body 1 is provided with two first clamping marks 3 on the bulging portion 11, and the two first clamping marks 3 form a double bulge after riveting, and the locking portion 22 is provided with an annular protrusion 6 near the nail head 21 for locking with the bulge after riveting to prevent the nail head from falling off and loosening, and a nail breaking place 7 is provided below the annular protrusion 6.

[0023] A plurality of closely spaced second clamping marks 4 are arranged at the workpiece clamping portion 12 near the brim flange 13 to ensure that after the bulging portion bulges, the bulging of the rod diameter near the brim flange is suppressed so that it does not come into excessive contact with the plastic workpiece 9, thereby preventing the plastic workpiece from bursting.

[0024] The number of the second clipping marks 4 is at least 3, the width of the second clipping marks 4 is 0.3-0.5 mm, and the interval between adjacent clipping marks is 1.3-1.5 mm. In specific implementation, the width of the second clipping marks 4 is set to 0.4 mm, and the interval between adjacent clipping marks is set to 1.4 mm.

[0025] The traction portion 23 of the nail core 2 is provided with a ring pattern 5 connected to the rivet pulling tool, and the bottom of the brim flange 13 is provided with an upper punching hole 8 supporting the rivet pulling tool.

[0026] When implemented, the technical requirements of this utility model are as follows:

[0027] 1.Material: Rivet body: SWCH6A Nail core: 45#

[0028] 2. Mechanical properties: Tensile strength: 2890N Min.

[0029] Shear resistance: 2000N Min.

[0030] 3. Rivet body surface treatment: trivalent black zinc-nickel alloy + sealing, containing torque control lubricant, coating thickness 8-14um, neutral salt spray test 240h no white rust, 960h no red rust, friction coefficient: 0.14±0.03 (10pcs replace bolts ISO4014-M10*50-8.8, refer to WZ101)

[0031] 4. Nail core surface treatment: electroplating trivalent blue-white zinc, coating thickness more than 3um, neutral salt spray test for 48h without red rust, sealant and lubricant are allowed.

[0032] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A double-drum blind rivet for connecting automobile plastic parts, characterized by: The invention comprises a rivet body (1) and a nail core (2), wherein the rivet body (1) comprises a bulging portion (11), a workpiece clamping portion (12) and a brim flange (13), and the nail core (2) comprises a nail head (21), a locking portion (22) and a traction portion (23). The rivet body (1) is provided with two first clamping marks (3) at the bulging portion (11), and a plurality of second clamping marks (4) with a close spacing are provided at the position of the workpiece clamping portion (12) close to the brim flange (13). The two first clamping marks (3) form a double bulge after riveting. The locking portion (22) is provided with an annular protrusion (6) close to the nail head (21) for locking in cooperation with the bulge after riveting, and a nail breaking portion (7) is provided below the annular protrusion (6).

2. The double-drum blind rivet for connecting automobile plastic parts according to claim 1 is characterized in that: The number of the second clamping prints (4) is at least 3.

3. The double-drum blind rivet for connecting automobile plastic parts according to claim 1 is characterized in that: The width of the second clamping mark (4) is 0.3-0.5 mm, and the interval between adjacent clamping marks is 1.3-1.5 mm.

4. The double-drum blind rivet for connecting automobile plastic parts according to claim 3 is characterized in that: The width of the second clamping print (4) is set to 0.4 mm, and the interval between adjacent clamping prints is set to 1.4 mm.

5. The double-drum blind rivet for connecting automobile plastic parts according to claim 1 is characterized in that: The traction portion (23) of the nail core (2) is provided with an annular pattern (5) connected to a riveting tool.

6. The double-drum blind rivet for connecting automobile plastic parts according to claim 1, characterized in that: An upper punching hole (8) for supporting a riveting tool is arranged at the bottom of the brim flange (13).

7. The double-drum blind rivet for connecting automobile plastic parts according to claim 1 is characterized in that: The surface of the rivet body (1) is plated with zinc-nickel alloy, and the coating thickness is 8-14 um. The surface of the nail core (2) is plated with blue-white zinc, and the coating thickness is more than 3 um.

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