Special rivet body for external locking wire-drawing rivet

Abstract

The utility model discloses a special rivet body for an external locking wire drawing rivet, which comprises a rivet body, a rivet core hole is arranged at the center of the rivet body, a pipe orifice inner hole is arranged at the tail end of the rivet core hole, the diameter and the length of the pipe orifice inner hole are determined according to the diameters of rod parts of rivet bodies made of different materials, and the pipe orifice inner hole is matched with the diameter of a rivet core clamping position. The part is effectively avoided, rod diameter expansion of the nail body is avoided, and the size meets the drawing requirement; the impact hole is formed in the front end of the rivet core hole, and burr design between the impact hole and the rivet core hole is omitted, so that the drilling resistance of the rivet core cup body is small, the rivet core cup body can be pulled and riveted to the step of the impact hole more easily, the rivet core is turned over to be opened and locked at the position, the rivet core cup body is prevented from rebounding, and loosening and falling are eradicated. The tail end of the rivet body and the pipe orifice are designed to be flat, the part is shaped by a previous station, cracks caused by material shearing are avoided, and it is ensured that after large-scale riveting, pipe orifice expansion does not cause pipe orifice cracking, riveting failure caused by pipe orifice cracking and influences on mechanical performance strength are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a special nail body for external locking brushed rivets. Background Art

[0002] Conventional external locking brushed rivets have the following problems: when the nail rod is inserted from the tail of the nail body, the diameter of the rod expands at the nail core clamping diameter part, which exceeds the diameter requirements of the drawing; a burr that tightens toward the center is designed at the hinge of the nail core hole and the counter-attack hole. After riveting, the nail core cup body has great resistance when drilling into this part, and the rivet cannot be pulled into place, resulting in the inability to open it and lock into the counter-attack hole step, causing the cup body to rebound and loosen; the pipe mouth at the tail of the nail body is an inward bevel. After riveting, the nail core cup body is easily cracked after drilling into it, forming a crack, which affects the mechanical strength of the product. Utility Model Content

[0003] The technical problem to be solved by the utility model is: to overcome the defects of the above-mentioned prior art and provide a special nail body for external locking brushed rivets, so as to avoid some abnormalities in the application of brushed rivets, such as rebound of the nail core cup after riveting, loosening and abnormal noise, cracking of the pipe mouth, and loose fixation of the cup riveted workpiece; before installation and use, the nail body and the nail core are prevented from being separated, so that installation and use are smoother; and quality abnormalities in the production process are avoided, which greatly reduces the product scrap rate and production costs.

[0004] The utility model solves the technical problem by adopting the following technical solution: a special nail body for external locking brushed rivets, comprising a nail body, a nail core hole is provided at the center of the nail body, a tube mouth inner hole is provided at the end of the nail core hole, a counter-attack hole is provided at the front end of the nail core hole, and the apertures of the counter-attack hole and the tube mouth inner hole are both larger than the aperture of the nail core hole.

[0005] Furthermore, the diameter and length of the inner hole (3) of the tube mouth are determined according to the diameter of the rod of the nail body.

[0006] Specifically, when the diameter of the stem is 4.8 mm, the inner diameter of the tube orifice is 3.55-3.65 mm; when the diameter of the stem is 6.4 mm, the inner diameter of the tube orifice is 4.65-4.75 mm.

[0007] Specifically, when the diameter of the stem is 4.8 mm, the length of the inner hole of the tube orifice is 2.0 to 2.4 mm; when the diameter of the stem is 6.4 mm, the length of the inner hole of the tube orifice is 2.3 to 2.8 mm.

[0008] Furthermore, the tube opening of the inner hole of the tube opening is flush with the end surface of the nail body.

[0009] The special nail body for external locking brushed rivets of the utility model has the following beneficial effects:

[0010] 1. Increase the inner hole of the nozzle to match the diameter of the nail core, so that the nail core can effectively avoid this part after assembly, without causing the nail body diameter to expand, and the size meets the requirements of the drawing;

[0011] 2. The burr design between the counterattack hole and the nail core hole is eliminated, which reduces the resistance of the nail core cup to drill into the counterattack hole and makes it easier to rivet to the step of the counterattack hole. The nail core is turned over and opened, and the lock is here to prevent the nail core cup from rebounding, thus preventing loosening and falling off.

[0012] 3. The end of the nail body is designed to be flat. This part is shaped by the previous station to avoid cracks caused by shearing. It ensures that after large-scale riveting, the expansion of the tube mouth will not cause cracking of the tube mouth, resulting in rivet failure and affecting the mechanical performance strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 It is a structural diagram of the present utility model.

[0015] In the figure: 1. Nail body, 2. Nail core hole, 3. Inner hole of the nozzle, 4. Back-strike hole. DETAILED DESCRIPTION

[0016] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0017] like Figure 1 The illustrated embodiment is a special nail body for an external locking wire drawing rivet, comprising a nail body 1, a nail core hole 2 being provided in the center of the nail body 1, a tube mouth inner hole 3 being provided at the end of the nail core hole 2, a counter-attack hole 4 being provided at the front end of the nail core hole 2, the apertures of the counter-attack hole 4 and the tube mouth inner hole 3 being larger than the aperture of the nail core hole 2, the burr design between the counter-attack hole 4 and the nail core hole 2 being cancelled, so that the resistance to drilling of the nail core cup is small, and it is easier to rivet to the step of the counter-attack hole, turn the nail core over and open it, and lock it here to prevent the nail core cup from rebounding, thereby preventing it from loosening and falling off.

[0018] Increase the inner hole of the pipe mouth to match the diameter of the nail core position, so that the nail core can effectively avoid this part after assembly, without causing the nail body rod diameter to expand. The size meets the requirements of the drawing. The diameter and length of the inner hole 3 of the pipe mouth are determined according to the diameter of the nail body rod.

[0019] When the diameter of the rod is 4.8 mm, the inner diameter of the tube mouth is 3.55 to 3.65 mm; when the diameter of the rod is 6.4 mm, the inner diameter of the tube mouth is 4.65 to 4.75 mm.

[0020] When the diameter of the rod is 4.8 mm, the length of the inner hole of the tube mouth is 2.0 to 2.4 mm. When the diameter of the rod is 6.4 mm, the length of the inner hole of the tube mouth is 2.3 to 2.8 mm.

[0021] The tube mouth of the inner hole 3 of the tube mouth is flush with the end face of the nail body 1. At the end of the nail body, the tube mouth is designed to be flat. This part is shaped by the previous workstation to avoid cracks caused by shearing, ensuring that after large-scale riveting, the tube mouth expands and does not crack, resulting in rivet failure and affecting the mechanical performance strength.

[0022] The special nail body of the external locking brushed rivet of the utility model avoids some abnormalities in the application of the draw rivet, such as the rebound of the nail core cup after riveting, loosening and abnormal noise, cracking of the pipe mouth, and loose fixation of the cup riveted workpiece; before installation and use, the nail body and the nail core are prevented from separating, making installation and use smoother; and quality abnormalities in the production process are avoided, greatly reducing product scrap rate and production costs.

[0023] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A special nail body for external locking brushed rivets, characterized by: The invention comprises a nail body (1), wherein a nail core hole (2) is provided at the center of the nail body (1), a tube mouth inner hole (3) is provided at the end of the nail core hole (2), a counter-attack hole (4) is provided at the front end of the nail core hole (2), and the apertures of the counter-attack hole (4) and the tube mouth inner hole (3) are both larger than the aperture of the nail core hole (2).

2. The special nail body for external locking brushed rivets according to claim 1, characterized in that: The diameter and length of the inner hole (3) of the tube mouth are determined according to the diameter of the rod of the nail body.

3. The special nail body for external locking brushed rivets according to claim 2, characterized in that: When the diameter of the rod is 4.8 mm, the inner diameter of the tube mouth is 3.55 to 3.65 mm; when the diameter of the rod is 6.4 mm, the inner diameter of the tube mouth is 4.65 to 4.75 mm.

4. The special nail body for external locking brushed rivets according to claim 2, characterized in that: When the diameter of the rod is 4.8 mm, the length of the inner hole of the tube mouth is 2.0 to 2.4 mm. When the diameter of the rod is 6.4 mm, the length of the inner hole of the tube mouth is 2.3 to 2.8 mm.

5. The special nail body for external locking brushed rivets according to claim 1, characterized in that: The tube mouth of the tube mouth inner hole (3) is flush with the end surface of the nail body (1).

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