Automatic feeding mechanism for punch rivet nut riveting

Abstract

The present invention discloses an automatic feeding mechanism for riveting punch rivet nuts, comprising a feeding tray, a feeding trough, and a storage tray. The feeding tray comprises a circular disk, an elastic paddle is installed in the circular disk, the elastic paddle rotates around the axis of the circular disk, a long strip through groove is provided at the bottom of the circular disk, a cylinder is installed below the circular disk, a push piece is fixedly connected to the piston rod of the cylinder, the feeding trough comprises two parallel guide rods, the storage tray comprises a circular plate driven to rotate by a dividing motor, a plurality of straight rods are vertically fixed on the surface of the circular plate, the end of the extension groove is close to the circle surrounded by the straight rods, and the height of the uppermost end of the straight rod is lower than the height of the extension groove. The automatic feeding mechanism for riveting punch rivet nuts of the present invention can uniformly store the punch rivet nuts in the direction of the square plate portion facing upward and accurately move them to a designated position for a manipulator to grab and feed, thereby realizing automatic feeding of the punch rivet nuts, thereby reducing labor costs and improving production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of feeding equipment, and in particular relates to an automatic feeding mechanism for riveting punch rivet nuts. Background Art

[0002] The shape of the punch rivet nut for automobiles is as follows Figure 1-2 As shown, it includes a square plate portion 1 and a four-corner nut portion 2 located in the middle of the square plate portion 1. As a riveting fastener, the traditional method is to manually load the punch rivet nut into the punch rivet equipment to complete the loading. This method has low loading efficiency and high labor costs, and manual loading also has safety hazards. Using a robot to grab the punch rivet nut to complete the loading can realize the automation of rivet nut loading, thereby reducing labor costs and improving production efficiency. However, due to the special shape of the punch rivet nut, in order to cooperate with the accurate grasping of the robot, the front and back sides of the punch rivet nut need to be placed correctly and accurately. Therefore, it is necessary to design an automatic riveting feeding mechanism for punch rivet nuts that can be used with a robot. Summary of the invention

[0003] In order to solve the above technical problems, the technical solution adopted by the present invention is: an automatic feeding mechanism for riveting nut rivets, including a feeding tray, a feeding trough, and a storage tray. The feeding tray includes a disc with enclosures on all sides, an elastic paddle driven to rotate by a first motor is installed in the disc, and the elastic paddle rotates around the axis of the disc. A long strip through groove is provided at the bottom of the disc, one end of the long strip through groove points to the axis of the disc, and the other end is connected to the circumferential surface of the disc, the enclosure above the long strip through groove is provided with an opening, and a cylinder is installed under the disc, and the piston rod of the cylinder A push piece is fixedly connected to the upper part, and the push piece can be movably extended into the long strip through groove. The piston rod of the cylinder is parallel to the length direction of the long strip through groove and points to the outside of the disc. The feeding trough includes two parallel guide rods, and an extension groove for the push piece to move is formed between the guide rods. The storage disc includes a circular plate driven to rotate by a dividing motor, and a plurality of straight rods are vertically fixed to the surface of the circular plate. The straight rods are arranged in a row around the circumference of the axis of the circular plate, and the end of the extension groove is close to the circle surrounded by the straight rods, and the height of the uppermost end of the straight rod is lower than the height of the extension groove.

[0004] As a preferred embodiment of the above technical solution, a screw rod is provided next to the straight rod, which is rotatably installed on a circular plate and driven by a second motor. A screw rod pair is installed on the screw rod, and the screw rod pair is fixedly connected to a lifting plate, and a through hole is provided on the lifting plate for the straight rod to pass through.

[0005] As a preferred embodiment of the above technical solution, the straight rod is sleeved in the square tube, the square tube is fixed on the circular plate, a long hole is provided on the side of the square tube close to the screw rod, the lifting plate passes through the long hole and is fixedly connected to the screw rod pair, and the upper end of the straight rod extends out of the square tube.

[0006] As a preferred embodiment of the above technical solution, baffles are respectively provided on both sides of the extension groove, the baffles are fixed on the guide rod, the length of the end of the baffle exceeds the guide rod and forms an extension part, and the extension part is located directly above the circle surrounded by the straight rods.

[0007] As a preferred embodiment of the above technical solution, a convex strip is provided at the bottom of the disc, the convex strip is closely attached to the bottom of the disc, one end of the convex strip points to the center of the disc, and the other end points to the enclosure.

[0008] The beneficial effects of the present invention are as follows: the automatic feeding mechanism for riveting punch rivet nuts of the present invention can uniformly store the punch rivet nuts in a direction in which the square plate portion faces upward and accurately move them to a designated position for a robot to grab and feed them, thereby realizing automatic feeding of the punch rivet nuts, thereby reducing labor costs and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the punch rivet nut;

[0010] Figure 2 It is a cross-sectional schematic diagram of a punch rivet nut;

[0011] Figure 3 It is a schematic diagram of the structure of the present invention;

[0012] Figure 4 is a top view of the present invention;

[0013] Figure 5 is a side view of the present invention;

[0014] Figure 6 This is a schematic diagram of the state of the punch rivet nut before passing through the convex strip;

[0015] Figure 7 This is a schematic diagram of the state of the punch rivet nut passing through the convex strip;

[0016] Figure 8 This is a schematic diagram of the state of the punch rivet nut after passing through the convex strip. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] like Figure 1-5As shown, the automatic feeding mechanism for riveting nut riveting comprises a feeding tray 3, a feeding trough 4 and a storage tray 5. The feeding tray 3 comprises a disc 7 with enclosures 6 on all sides. An elastic paddle 8 driven to rotate by a first motor (not shown) is installed in the disc 7. The elastic paddle 8 rotates around the axis of the disc 7. An elongated through groove 9 is provided at the bottom of the disc 7. One end of the elongated through groove 9 points to the axis of the disc 7, and the other end is connected to the circumferential surface of the disc 7. An opening 10 is provided at the enclosure above the elongated through groove 9. A cylinder 11 is installed below the disc 7. A push piece 12 is fixedly connected to the piston rod of the cylinder 11. The push piece 12 It can be movably extended into the long strip through slot 9, the piston rod of the cylinder 11 is parallel to the length direction of the long strip through slot 9 and points to the outside of the disc 7, the feed trough 4 includes two parallel guide rods 13, and an extension slot 14 for the push piece 12 to move is formed between the guide rods 13, and the storage tray 5 includes a circular plate 16 driven to rotate by a dividing motor 15, and a plurality of straight rods 17 are vertically fixed on the surface of the circular plate 16, and the straight rods 17 are arranged in a row around the axis of the circular plate 16. The end of the extension slot 14 is close to the circle surrounded by the straight rods 17, and the height of the upper end of the straight rods 17 is lower than the height of the extension slot 14. The punch rivet nut is placed in the disc 7, and some of the punch rivet nuts are in a state where the four-corner nut part 2 is facing downward, and the rest are in a state where the four-corner nut part 2 is facing upward. The first motor drives the elastic paddle 8 to rotate, and the elastic paddle 8 pushes the punch rivet nut in the disc 7 to move centrifugally, wherein the four-corner nut part 2 of the part of the punch rivet nut facing downward is stuck in the long strip through slot 9, and then the cylinder 11 drives the push piece 12 to push the punch rivet nut in the long strip through slot 9 into the extension slot 14 and drop it one by one from the end of the extension slot 14. The indexing motor 15 drives the circular plate 16 to rotate, so that one of the straight rods 17 stays below the end of the extension slot 14, and the punch rivet nut dropped from the end of the extension slot 14 is sleeved on the straight rod 17 and automatically slides to the lower end of the straight rod 17. The punch rivet nuts are strung on the straight rod 17 from bottom to top, so that the punch rivet nuts on the straight rod have precise positions and positive and negative directions. After the circular plate 16 rotates, the straight rod 17 filled with punch rivet nuts stays at the specified position, so that the robot hand can take the punch rivet nuts from the straight rod 17 one by one for loading. The part of the punch rivet nut with the four corner nut part 2 facing upward is constantly adjusted under the push of the elastic paddle 8 until the four corner nut part 2 is embedded in the long strip through groove 9 when facing downward. A vibration motor can also be set to make the disc 7 vibrate, which is more conducive to adjusting the posture of the punch rivet nut.

[0021] Furthermore, a screw rod 18 is provided next to the straight rod 17, and the screw rod 18 is rotatably installed on the circular plate 16 by being driven by a second motor 19, and a screw rod pair 20 is installed on the screw rod 18, and the screw rod pair 20 is fixedly connected to a lifting plate 21, and a through hole is provided on the lifting plate 21 for the straight rod 17 to pass through. When the robot grabs the punch rivet nut on the straight rod 17, it grabs the punch rivet nut on the top of the straight rod 17, and then the screw rod 18 drives the lifting plate 21 to rise, so that the next punch rivet nut rises to a specified height for the robot to grab, which reduces the stroke design requirements for the robot.

[0022] Furthermore, the straight rod 17 is sleeved in the square tube 22, the square tube 22 is fixed on the circular plate 16, a long hole 23 is provided on the side of the square tube 22 close to the screw rod 18, the lifting plate 21 passes through the long hole 23 and is fixedly connected to the screw rod pair 20, and the upper end of the straight rod 17 extends out of the square tube 22. The square tube 22 serves to limit the punch rivet nut, preventing it from rotating on the straight rod 17, and facilitating the robot hand to grasp it.

[0023] Furthermore, baffles 24 are respectively provided on both sides of the extension groove 14, and the baffles 24 are fixed on the guide rod 13. The length of the end of the baffle 24 exceeds the guide rod 13 and forms an extension part 25, and the extension part 25 is located directly above the circle surrounded by the straight rods 17. The baffles 24 on both sides of the extension part 25 can ensure that the punch rivet nut is accurately sleeved on the straight rod 17 below.

[0024] Furthermore, a convex strip 26 is provided at the bottom of the disk 7, and the convex strip 26 is close to the bottom of the disk 7, one end of the convex strip 26 points to the center of the disk 7, and the other end points to the enclosure 6. When the elastic paddle 8 pushes the punch rivet nut to move in the disk 7, the square plate portion 1 of the punch rivet nut with the four-corner nut portion 2 facing upward is blocked by the convex strip 26, so that the punch rivet nut will tilt, so that most of the four-corner nut portions 2 of the punch rivet nut continue to move in the disk 7 tilted downward, and when they move to the long strip through groove 9, they are embedded in the long strip through groove 9, as shown in FIG. Figure 6-8 The gap between the elastic paddle 8 and the disc 7 is larger than the height of the convex strip 26 , and the height of the convex strip 26 is equivalent to the thickness of the square plate portion 1 .

[0025] It is worth mentioning that the technical features such as the first motor, indexing motor, second motor, cylinder, vibration motor involved in the patent application of the present invention should be regarded as the prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected according to the conventional selection in the field, and should not be regarded as the inventive point of the patent of the present invention. The patent of the present invention will not be further elaborated.

[0026] The preferred specific embodiments of the present invention are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. Automatic feeding mechanism for punch rivet nut riveting, characterized in that: The invention comprises a loading plate, a feeding trough and a storage plate, wherein the loading plate comprises a disc with enclosures on all sides, an elastic paddle driven by a first motor is installed in the disc, the elastic paddle rotates around the axis of the disc, an elongated through slot is arranged at the bottom of the disc, one end of the elongated through slot points to the axis of the disc, and the other end is connected to the circumferential surface of the disc, an enclosure above the elongated through slot is provided with an opening, a cylinder is installed under the disc, a push piece is fixedly connected to the piston rod of the cylinder, the push piece can be movably extended into the elongated through slot, the piston rod of the cylinder is parallel to the length direction of the elongated through slot and points to the outside of the disc, the feeding trough comprises two parallelly arranged guide rods, An extension groove for the push piece to move is formed between the guide rods, and the storage tray includes a circular plate driven to rotate by a dividing motor, and a plurality of straight rods are vertically fixed to the surface of the circular plate, and the straight rods are arranged in a row around the circumference of the axis of the circular plate, and the end of the extension groove is close to the circle surrounded by the straight rods, and the height of the uppermost end of the straight rods is lower than the height of the extension groove. A screw rod is provided next to the straight rod, and the screw rod is rotatably installed on the circular plate driven by a second motor, and a screw rod pair is installed on the screw rod, and the screw rod pair is fixedly connected to a lifting plate, and a through hole is provided on the lifting plate for the straight rod to pass through, and a convex strip is provided at the bottom of the circular plate, and the convex strip is close to the bottom of the circular plate, one end of the convex strip points to the center of the circular plate, and the other end points to the enclosure.

2. The automatic feeding mechanism for punch rivet nuts according to claim 1, characterized in that: The straight rod is sleeved in the square tube, the square tube is fixed on the circular plate, a long hole is arranged on the side of the square tube close to the screw rod, the lifting plate passes through the long hole and is fixedly connected to the screw rod pair, and the upper end of the straight rod extends out of the square tube.

3. The automatic feeding mechanism for punch rivet nuts according to claim 2, characterized in that: Baffles are respectively arranged on both sides of the extension groove, and the baffles are fixed on the material guide rod. The length of the end of the baffle exceeds the material guide rod and forms an extension part, and the extension part is located directly above the circle surrounded by the straight rods.

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