Automatic rivet feeding module of handheld SPR riveting device

Abstract

The utility model relates to the technical field of riveting equipment, and discloses an automatic rivet feeding module of a handheld SPR (Surface Plasmon Resonance) riveting device, which is characterized in that through a positioning part on a rivet feeding body, an inverted buckle head of a fastener is inserted into a positioning hole corresponding to a rivet in a material belt for primary positioning; after the first arc-shaped flange positions one side of the punching rod and the second arc-shaped flange further positions the other side of the punching rod and the rivet cap edge, second-time positioning is completed; the posture balance of the rivet is ensured; meanwhile, the rivets continue to enter the guide part, the guide part further guides the rivets, the levelness of the rivets is guaranteed, and the rivet overturning phenomenon is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of riveting equipment, in particular to an automatic nail feeding module of a handheld SPR riveting device. Background Art

[0002] SPR (Self Piercing Rivet) self-piercing riveting device is a riveting form that does not require a bottom hole to be drilled in the base material. It uses rivets to penetrate the upper base material but not the lower base material to connect multiple base materials together. SPR self-piercing riveting technology is widely used in automobile manufacturing, aviation aluminum alloy structures, home appliances and electronic equipment. By using SPR rivets to impact two aluminum alloy parts at high speed, the self-piercing riveting machine connects them together to form a high-strength and solid joint.

[0003] Large-scale SPR self-piercing riveting equipment generally adopts the method of automatic rivet feeding with a material belt, but small handheld SPR riveting devices mostly adopt the manual feeding method in which the operator presses the rivets into the feeding mechanism. Since the feeding mechanism is provided with components such as steel balls and O-rings that circumferentially hold the rivets, and the rivet cross-section is small, the operator's hands are locally subjected to large force and are prone to pain during manual feeding, resulting in reduced production efficiency. At the same time, manual feeding can easily cause rivets to tilt or flip. The current automatic feeding device is mainly used for large equipment, and its structure is complex and heavy, so it is not suitable for installation on handheld SPR riveting devices. Utility Model Content

[0004] The utility model aims to provide an automatic nail feeding module of a handheld SPR riveting device to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An automatic nail feeding module of a handheld SPR riveting device comprises a nail feeding body, a positioning part, a guide part and a material belt, wherein a through hole for penetrating a punch rod is provided in the nail feeding body from top to bottom, the upper end of the nail feeding body is butted with the bottom of the riveting device, a transverse channel is provided through the lower end of the nail feeding body, a material belt for conveying rivets is provided through the transverse channel, and the end of the through hole vertically penetrating the transverse channel is connected to the guide part;

[0007] The positioning portion is arranged in the transverse channel, a first groove is arranged on one side of the material belt feed port of the transverse channel, a second groove is arranged on one side of the material discharge port, a first limit block is installed in the first groove, a fastener is connected to one side of the first limit block, and a second limit block is installed in the second groove;

[0008] The first limiting block includes a first limiting nail feeding body, a screw hole is provided in the middle of the first limiting nail feeding body, a connecting shaft is installed in the screw hole, a sliding groove is provided in the middle of the fastener, the other end of the connecting shaft is passed through the sliding groove, and a spring is provided between the fastener and the first groove; a buckle head is provided at the bottom end of the fastener, and the second limiting block includes a second limiting nail feeding body.

[0009] Furthermore, the material strip is provided with a row of material holes with the same spacing along the center line, each material hole is correspondingly provided with a rivet, and both sides of the edge of the material strip are respectively provided with a row of positioning holes with the same spacing and relative positions, the positioning holes and the material holes are evenly spaced and arranged, and the positioning holes are used to buckle into the buckle heads.

[0010] Furthermore, the connecting shaft is fixed on one side of the screw hole of the first limiting nail feeding body as a fixed end, and is passed through one side of the slide groove as a free end. A bearing is provided on the connecting shaft, and the bearing is used to reduce the friction between the free end of the connecting shaft and the slide groove.

[0011] Furthermore, there are two connecting shafts, and a corresponding bearing is provided at the free end of each connecting shaft.

[0012] Furthermore, a first extension portion is provided at the lower end of the first position-limiting rivet-feeding body along one side of the material belt conveying direction, and the first extension portion is provided with a first arc-shaped retaining edge corresponding to the outer periphery of the rivet cap edge portion.

[0013] Furthermore, a second extending portion is provided at the lower end of the second position-limiting nail-feeding body on one side opposite to the conveying direction of the material belt, and a second arc-shaped rib symmetrical to the first arc-shaped rib is provided on the second extending portion;

[0014] Furthermore, the first arc-shaped rib and the second arc-shaped rib are staggered in a vertical direction.

[0015] Furthermore, the guide portion includes a guide joint, a guide cylinder and a nail feeding mouth placed in the guide cylinder, the outer wall of the nail feeding mouth is circumferentially opened with a plurality of annular paths for installing flexible parts, the nail feeding mouth is spliced ​​by a plurality of circular arc pieces to form a guide channel for pushing rivets, and the top end of the nail feeding mouth protrudes from the top end of the guide cylinder and is connected to the end of the through hole through the guide joint.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] This module uses the positioning part on the rivet feeding body to insert the undercut head of the fastener into the positioning hole corresponding to the rivet in the material strip for the first positioning; the first arc-shaped retaining edge positions one side of the punch rod, and the second arc-shaped retaining edge further positions the other side of the punch rod and the rivet cap edge to complete the second positioning; the posture balance of the rivet is ensured; at the same time, the rivet continues to enter the guide part, and the guide part further guides it to ensure its horizontality, effectively reducing the phenomenon of flipping the rivet;

[0018] The bearing used in this module is a cylindrical rolling bearing, whose internal rollers are arranged in parallel, and spacers are installed between the rollers, which can effectively avoid the rollers from tilting or rubbing against each other, thereby reducing the increase in rotational torque; at the same time, the rollers are in line contact with the inner and outer ring raceways. When external force acts in the axial direction, the rollers will roll along the raceways of the inner and outer rings, converting the external force into axial force and radial force. Compared with sliding friction, this rolling friction can significantly reduce friction losses and increase the service life of the bearing; and when the fastener moves up and down, the inner wall of the slide groove exerts pressure on the bearing, causing slight misalignment of the bearing, but because the rollers of the bearing can move relatively in the raceway, this makes the bearing have a certain degree of self-alignment, and this self-alignment can compensate for slight misalignment of the bearing, thereby maintaining the normal operation of the bearing.

[0019] The module has a simple structure and light weight, and is easy and convenient to install on a handheld SPR riveting device. It does not require manual nail pressing, which increases the operator's comfort and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a disassembled diagram of the three-dimensional structure of the utility model;

[0021] Figure 2 It is a partial schematic diagram of the utility model;

[0022] Figure 3 This is a schematic diagram of the main cross-section of the utility model;

[0023] In the figure: 100-nail delivery body, 120-second groove, 200-positioning part, 210-first limiting block, 2101-first arc-shaped rib, 211-fastener, 2111-slide groove, 2112-inverted head, 212-connecting shaft, 2121-bearing, 213-spring, 220-second limiting block, 2201-second arc-shaped rib, 300-guide part, 310-guide joint, 320-guide cylinder, 330-nail delivery mouth, 400-material strip, 410-rivet. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1-2 As shown, an automatic nail feeding module of a handheld SPR riveting device includes a nail feeding body 100, a positioning part 200, a guide part 300 and a material belt 400. A through hole for penetrating a punch rod is provided in the nail feeding body 100 from top to bottom. The upper end of the nail feeding body 100 is connected to the bottom of the riveting device. A transverse channel is provided at the lower end of the nail feeding body 100. A material belt 400 for conveying rivets 410 is provided in the transverse channel. The end of the through hole vertically penetrating the transverse channel is connected to the guide part 300.

[0026] like Figure 1 As shown, the positioning portion 200 is arranged in the transverse channel, a first groove (not shown in the figure) is provided on one side of the material belt 400 feeding port of the transverse channel, and a second groove 120 is provided on one side of the material belt 400 discharging port, a first limiting block 210 is installed in the first groove, a fastener 211 is connected to one side of the first limiting block 210, and a second limiting block 220 is installed in the second groove 120;

[0027] like Figure 1 As shown, the first limiting block 210 includes a first limiting nail feeding body 100, a screw hole is provided in the middle of the first limiting nail feeding body 100, a connecting shaft 212 is installed in the screw hole, a slide groove 2111 is provided in the middle of the fastener 211, the other end of the connecting shaft 212 is passed through the slide groove 2111, and a spring 213 is provided between the fastener 211 and the first groove; when the fastener 211 moves downward, the spring 213 is provided with an inverted head 2112 at the bottom end of the fastener 211, and the second limiting block 220 includes a second limiting nail feeding body 100.

[0028] like Figure 2 As shown, the material strip 400 is provided with a row of material holes with the same spacing along the center line, and each material hole is correspondingly provided with a rivet 410. Both sides of the edge of the material strip 400 are provided with a row of positioning holes with the same spacing and relative positions. The positioning holes are evenly spaced from the material holes, and the positioning holes are used to buckle into the buckle heads 2112.

[0029] like Figure 1As shown, the connecting shaft 212 is fixed on one side of the screw hole of the first limiting nail feeding body 100 as a fixed end, and is passed through the side of the slide groove 2111 as a free end. A bearing 2121 is provided on the connecting shaft 212, and the bearing 2121 uses its rolling body to roll between the inner and outer rings to reduce the friction between the free end of the connecting shaft 212 and the slide groove 2111.

[0030] In actual implementation, the bearing 2121 used in this module is a cylindrical rolling bearing 2121, whose internal rollers are arranged in parallel, and spacers are installed between the rollers, which can effectively avoid the rollers from tilting or rubbing against each other, thereby reducing the increase in rotational torque; at the same time, the rollers are in line contact with the inner and outer ring raceways. When external force acts in the axial direction, the rollers will roll along the raceways of the inner and outer rings, converting the external force into axial force and radial force. Compared with sliding friction, this rolling friction can significantly reduce friction losses and increase the service life of the bearing 2121; and, when the fastener 211 moves up and down, the inner wall of the slide groove 2111 generates pressure on the bearing 2121, resulting in a slight misalignment of the bearing 2121, but because the rollers of the bearing 2121 can move relatively in the raceway, this makes the bearing 2121 have a certain degree of self-alignment, and this self-alignment can compensate for the slight misalignment of the bearing 2121, thereby maintaining the normal operation of the bearing 2121.

[0031] like Figure 2 As shown, there are two connecting shafts 212 , and a bearing 2121 is correspondingly provided at the free end of each connecting shaft 212 .

[0032] like Figure 1 As shown, the first position-limiting rivet feeding body 100 has a first extension portion at the lower end along one side of the conveying direction of the material belt 400 , and the first extension portion has a first arc-shaped retaining edge 2101 corresponding to the outer periphery of the cap edge portion of the rivet 410 .

[0033] like Figure 1 As shown, the lower end of the second position-limiting nail feeding body 100 is provided with a second extension portion along the opposite side of the conveying direction of the material belt 400, and the second extension portion is provided with a second arcuate rib 2201 symmetrical to the first arcuate rib 2101;

[0034] In actual implementation, the first arc-shaped rib 2101 and the second arc-shaped rib 2201 are staggered in the vertical direction.

[0035] like Figure 2-3As shown, the guide portion 300 includes a guide joint 310, a guide cylinder 320 and a nail delivery mouth 330 disposed in the guide cylinder 320, the outer wall of the nail delivery mouth 330 is circumferentially opened with a plurality of annular paths for installing flexible parts, the nail delivery mouth 330 is composed of a plurality of circular arc pieces spliced ​​together to form a guide channel for pushing the rivet 410, the top end of the nail delivery mouth 330 protrudes from the top end of the guide cylinder 320 and is connected to the end of the through hole through the guide joint 310.

[0036] The working principle of this embodiment:

[0037] Install the nail feeding module at the end of the riveting gun of the handheld SPR riveting device, pass the material strip with rivets through the transverse channel of the nail feeding body, and when the rivet is aligned with the guide cylinder, press the fastener of the positioning part to insert the undercut head into the positioning hole corresponding to the rivet in the material strip for the first positioning;

[0038] Start the riveting device, and the punch rod moves downward. When the punch rod is about to contact the rivet cap, the first arc-shaped guard edge positions one side of the punch rod. When the punch rod contacts the rivet cap, the second arc-shaped guard edge further positions the other side of the punch rod and the edge of the rivet cap, completing the second positioning of the punch rod. The punch rod pushes the rivet downward, and sends the rivet to the lower die of the riveting device through the guide part to complete the riveting with the riveted part. After the riveting is completed, the spring causes the fastener to rebound and reset, and the buckled head of the fastener detaches from the positioning hole of the material strip, and then pulls the material strip to the output end for the next riveting.

[0039] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic nail feeding module of a handheld SPR riveting device, characterized in that: It includes a nail feeding body, a positioning part, a guide part and a material belt. A through hole for penetrating a punch rod is provided in the nail feeding body from top to bottom. The upper end of the nail feeding body is butted with the bottom of the riveting device. A transverse channel is provided at the lower end of the nail feeding body. A material belt for conveying rivets is provided in the transverse channel. The end of the through hole vertically penetrating the transverse channel is connected to the guide part. The positioning portion is arranged in the transverse channel, a first groove is arranged on one side of the material belt feed port of the transverse channel, a second groove is arranged on one side of the material discharge port, a first limit block is installed in the first groove, a fastener is connected to one side of the first limit block, and a second limit block is installed in the second groove; The first limiting block includes a first limiting nail feeding body, a screw hole is provided in the middle of the first limiting nail feeding body, a connecting shaft is installed in the screw hole, a sliding groove is provided in the middle of the fastener, the other end of the connecting shaft is passed through the sliding groove, and a spring is provided between the fastener and the first groove; a buckle head is provided at the bottom end of the fastener, and the second limiting block includes a second limiting nail feeding body.

2. The automatic nail feeding module of a handheld SPR riveting device according to claim 1, characterized in that: The material strip is provided with a row of material holes with the same spacing along the center line, and each material hole is correspondingly provided with a rivet. Both sides of the edge of the material strip are provided with a row of positioning holes with the same spacing and relative positions. The positioning holes are evenly spaced from the material holes, and the positioning holes are used to buckle into the buckle heads.

3. The automatic nail feeding module of a handheld SPR riveting device according to claim 1 is characterized in that: The connecting shaft is fixed on one side of the screw hole of the first position-limiting nail feeding body as a fixed end, and is passed through one side of the slide groove as a free end. A bearing is provided on the connecting shaft, and the bearing is used to reduce the friction between the free end of the connecting shaft and the slide groove.

4. The automatic nail feeding module of the handheld SPR riveting device according to claim 3 is characterized by: There are two connecting shafts, and a bearing is correspondingly provided at the free end of each connecting shaft.

5. The automatic nail feeding module of the handheld SPR riveting device according to claim 1 is characterized in that: A first extending portion is provided at the lower end of the first position-limiting rivet-feeding body along one side of the material belt conveying direction, and the first extending portion is provided with a first arc-shaped retaining edge corresponding to the outer periphery of the rivet cap edge portion.

6. The automatic nail feeding module of the handheld SPR riveting device according to claim 5, characterized in that: A second extending portion is provided at the lower end of the second position-limiting nail feeding body along the opposite direction of the material belt conveying, and a second arcuate rib symmetrical to the first arcuate rib is provided on the second extending portion.

7. The automatic nail feeding module of the handheld SPR riveting device according to claim 6, characterized in that: The first arc-shaped rib and the second arc-shaped rib are staggered in a vertical direction.

8. The automatic nail feeding module of a handheld SPR riveting device according to claim 1, characterized in that: The guide part includes a guide joint, a guide cylinder and a nail feeding mouth placed in the guide cylinder, the outer wall of the nail feeding mouth is circumferentially opened with a plurality of annular paths for installing flexible parts, the nail feeding mouth is spliced ​​by a plurality of circular arc pieces to form a guide channel for pushing rivets, the top end of the nail feeding mouth protrudes from the top end of the guide cylinder and is connected to the end of the through hole through the guide joint.

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