A flat self-piercing riveting structure

Abstract

A planar self-piercing riveting structure includes a punch stripper provided with a gun nose side channel. A rivet conveyor includes a pressure plate assembly and a top block, the pressure plate assembly abutting the gun nose side channel. The pressure plate assembly is provided with a first path, a second path and a third path, the first path being communicated with the second path and the third path. The top block includes a first layer structure and a second layer structure spaced apart by a predetermined distance and facing the same direction, the first layer structure and the second layer structure moving synchronously in the first path and the third path respectively. On the one hand, the first object and the second object can be conveyed simultaneously, and on the other hand, the adjacent first object and the second object can be prevented from colliding and causing blockage.

Description

Technical Field

[0001] This invention relates to the field of riveting technology, specifically to a planar self-piercing riveting structure. Background Technology

[0002] Riveting is a method of connecting multiple parts by using the axial force of a punch to thicken the rivet shank in the rivet hole and form a rivet head. Most existing rivet conveyors use a single-layer pusher component to push the rivet to the designated riveting position.

[0003] Authorization announcement number CN116475719B discloses a self-piercing riveting punch mechanism, specifically comprising a base 1, a nut feeding mechanism 2, a punching rod 3, and a nut pushing mechanism 4. The base 1 has a nut conveying channel 11 and a through hole 12. The through hole 12 is perpendicular to the nut conveying channel 11 and communicates with it. The nut feeding mechanism 2 is adapted to feed nuts 5 into the nut conveying channel 11. The nut feeding mechanism 2 includes a conveying pipe 21. The conveying pipe 21 allows the nuts 5 to be conveyed sequentially. The output end of the conveying pipe 21 is connected to the base 1 and communicates with the nut conveying channel 11. For example, an opening can be made on the base 1 to connect with the conveying pipe 21, after which the conveying pipe 21 communicates with the nut conveying channel 11. A nut anti-reverse device is provided on the side of the stamping rod 3 and on the nut transfer channel 11 to prevent the nut 5, which is transported to the bottom of the stamping rod 3, from moving toward the push rod 41.

[0004] The aforementioned publicly available document describes a nut anti-backflow device on the base that can solve the nut backflow problem. However, this single-layer base structure can only feed one nut at a time through the anti-backflow rod. If multiple nuts pass through the anti-backflow rod simultaneously, the rod will remain open, thus losing its backflow function. Furthermore, multiple nuts entering the feeding mechanism at the same time can easily cause blockages. Therefore, this structure, which can only feed one nut at a time, significantly reduces work efficiency. Thus, it is necessary to design a self-piercing riveting punch mechanism with a multi-layer feeding structure. Summary of the Invention

[0005] To address the problems existing in the prior art, the purpose of this invention is to provide a planar self-piercing riveting structure that can simultaneously store multiple rivets and sequentially transport the rivets to the nose-side channel.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A planar self-piercing riveting structure includes: a punch ejector with a nose-side channel; a rivet conveyor including a pressure plate assembly and a top block, the pressure plate assembly abutting against the nose-side channel; the pressure plate assembly having a first path, a second path, and a third path, the first path communicating with the third path via the second path; the top block including a first layer structure and a second layer structure spaced at a predetermined distance and facing the same direction, the first layer structure and the second layer structure synchronously reciprocating in the first path and the third path respectively; the first layer structure applying a first force to a first object entering the first path, the first object moving a certain distance in the first path and then moving into the second path; the second layer structure applying a second force to a second object entering the third path from the second path, the second object moving a certain distance in the third path and then moving from the third path into the nose-side channel.

[0008] Furthermore, the rivet conveyor also includes a push rod; the interior of the second layer structure is a hollow structure, and the push rod is disposed in the hollow structure; when the second object has not moved into the nose-side channel, the push rod extends out from the hollow structure and moves the second object from the third path into the nose-side channel.

[0009] Furthermore, the rivet conveyor also includes a fixed base; the fixed base is provided with a rivet feeding path, and the rivet feeding path is connected to the first path.

[0010] Furthermore, the rivet feeder also includes an elastic limiting structure disposed in the rivet feeding path and / or the second path.

[0011] Furthermore, the rivet conveyor also includes a magnetic attraction structure, which is disposed at the first object movement starting point position of the first path and / or at the second object movement starting point position of the third path.

[0012] Furthermore, one end of the second path is connected to the endpoint of the first object movement in the first path, and the other end of the second path is connected to the starting point of the second object movement in the third path. The length of the second path is approximately the same as the distance between the first layer structure and the second layer structure.

[0013] Furthermore, on the vertical projection plane, the projection of the first path is located above the projection of the third path, and they are offset from each other.

[0014] Furthermore, on the horizontal projection plane, the projection of the first path is located on one side of the projection of the third path, and they are offset from each other.

[0015] Furthermore, the rivet conveyor also includes a drive structure. After the first object moves a certain distance in the first path, the drive structure applies a third force to the first object, and the first object moves into the second path.

[0016] Furthermore, the top block also includes a fixing block, with one end of the first layer structure and one end of the second layer structure disposed on the fixing block.

[0017] Furthermore, the length of the first layer structure is less than or equal to the length of the second layer structure.

[0018] Furthermore, the rivet conveyor also includes a top block cylinder and a top rod cylinder; the top block cylinder is disposed on the pressure plate assembly, and the driving end of the top block cylinder is connected to the top block; the top rod cylinder is disposed on the fixed block, and the driving end of the top rod cylinder is connected to the top rod.

[0019] Furthermore, a limiting structure is provided at the other end of the first layer structure. Under the first force, the first object located in the limiting structure moves from the starting position of the first object movement on the first path to the ending position of the first object movement.

[0020] Furthermore, the limiting structure includes a front limiting member and a limiting connector. The front limiting member is connected to the end of the first layer structure through the limiting connector. The front limiting member, the limiting connector, and the end of the first layer structure form a limiting space, and the first object is disposed in the limiting space.

[0021] Furthermore, an alignment space is provided on one side of the endpoint of the first object movement along the first path, and the width of the alignment space is approximately the same as the thickness of the front limiting member.

[0022] Furthermore, the punch demolding device includes a demolding head, the lower end of which is detachably provided with a gun nose, the demolding head having a demolding channel inside, and the gun nose having a gun nose straight channel communicating with the demolding channel inside; a punch, which is disposed inside the demolding head and can move up and down in the demolding channel and the gun nose straight channel; a heavy-duty spring and at least one light-duty spring, which are sequentially sleeved on the punch; during demolding, by squeezing the heavy-duty spring and at least one light-duty spring, a force is applied to the demolding head, causing the gun nose to press tightly against the riveted material.

[0023] Furthermore, the demolding head includes a lower part and an upper part; the demolding channels include a first demolding channel, a second demolding channel and a third demolding channel from bottom to top, and the diameters of the first demolding channel, the second demolding channel and the third demolding channel increase sequentially.

[0024] Furthermore, the spring constant of the heavy-load spring is greater than that of the light-load spring.

[0025] Furthermore, the light-load spring is sleeved on the end of the punch near the nose of the gun, and the heavy-load spring is sleeved on the end of the punch away from the nose of the gun.

[0026] Furthermore, the punch ejector also includes a heavy-duty spring block and a light-duty spring block. The heavy-duty spring block is disposed on the upper part of the punch, and the upper end of the heavy-duty spring abuts against the heavy-duty spring block. The light-duty spring block is sleeved on the middle part of the punch, and the light-duty spring block is located between the lower end of the heavy-duty spring and the upper end of the light-duty spring.

[0027] Furthermore, a first recess and a second recess are respectively provided at the upper and lower ends of the light-load spring block, and a first through hole is provided in the middle of the light-load spring block. The first recess communicates with the second recess through the first through hole.

[0028] Furthermore, a second through hole is provided in the middle of the light-load spring block, and a plurality of groove-shaped structures are provided on the lower end face of the light-load spring block with the second through hole as the center, and the upper end of the light-load spring is disposed in the groove-shaped structures.

[0029] Furthermore, a third through hole is provided in the middle of the lightly loaded spring block.

[0030] Furthermore, a blind hole is provided at the lower end of the heavy-duty spring block, and the upper part of the punch is disposed in the blind hole.

[0031] Furthermore, a third recess and a fourth recess are respectively provided at the upper and lower ends of the heavy-duty spring block, and a fourth through hole is provided in the middle of the heavy-duty spring block. The third recess communicates with the fourth recess through the fourth through hole. The punch is disposed in the fourth through hole, with the upper end of the punch disposed in the third recess, and the upper end of the heavy-duty spring abuts against the fourth recess.

[0032] Furthermore, the punch ejector also includes an elastic limiting component; the elastic limiting component is disposed in the straight channel of the gun nose.

[0033] Furthermore, the punch ejector also includes a driving device, the lower end of the driving piston rod of the driving device is provided with a first cavity, and the upper end of the ejector head is disposed in the first cavity; when the driving device is working, the bottom wall of the first cavity abuts against the upper part of the punch, driving the ejector head and the punch to move downward.

[0034] Furthermore, the punch ejector also includes an ejector head pressure plate, which is sleeved on the ejector head and is detachably connected to the lower end of the drive piston rod.

[0035] Furthermore, a guide structure is provided on the outer wall of the demolding head along the central axis, and the demolding head pressure plate is sleeved on the guide structure. Under the action of the driving piston rod, the demolding head pressure plate moves up and down in the guide structure.

[0036] Furthermore, the guide structure is in the form of a keyway or a milled flat surface.

[0037] Furthermore, a slot is provided laterally on the side wall of the lower part of the demolding head; an insertion cavity is provided on the upper end of the gun nose, and a through hole is provided laterally on the upper side wall of the gun nose, the through hole passing through the insertion cavity; the lower part of the demolding head is inserted into the insertion cavity, a snap-fit ​​component is inserted into the through hole, the two ends of the snap-fit ​​component are located in the through hole, and the middle part of the snap-fit ​​component is located in the slot.

[0038] Furthermore, the upper end of the gun nose is provided with a mounting portion, and the mounting portion is provided with a plurality of first mounting holes; the lower end face of the demolding head is provided with a plurality of second mounting holes corresponding to the plurality of first mounting holes, and one end of a mounting component passes through the first mounting hole and is disposed in the second mounting hole, thereby mounting the gun nose on the lower end of the demolding head.

[0039] Furthermore, at least one positioning recess is provided on the upper surface of the mounting portion, and the lower end of the light-load spring is disposed in the positioning recess.

[0040] Furthermore, when viewed from below, the projection of the gun nose is located in the middle of the projection of the mounting part, and a plurality of the first mounting holes are distributed around the projection of the gun nose.

[0041] Furthermore, an insertion protrusion is provided at the middle position of the lower end face of the demolding head, and an insertion recess is formed between the upper end face of the gun nose and the inner wall of the mounting part. When the lower end of the demolding head is installed together with the upper end of the gun nose, the insertion protrusion is inserted into the insertion recess.

[0042] The beneficial effects of this invention are as follows: A first path, a second path, and a third path are sequentially connected on the pressure plate assembly, and the top block is designed as a multi-layered structure. This multi-layered structure moves back and forth within the first and third paths, allowing the first and second objects to move simultaneously within both paths. The first object must pass through the second path to enter the third path. Before entering the third path, the second path temporarily stores the first object, while the second object is pushed into the nose-side channel by the lower layer of the top block. This allows for the simultaneous transport of both the first and second objects, and also prevents adjacent first and second objects from colliding and causing blockages. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the planar structure of the present invention;

[0044] Figure 2 yes Figure 1 A cross-sectional view;

[0045] Figure 3 yes Figure 1 A three-dimensional structural diagram of a rivet conveyor;

[0046] Figure 4 yes Figure 3 A schematic diagram of the decomposed structure;

[0047] Figure 5 yes Figure 3 Cross-sectional view of the lower and middle structure;

[0048] Figure 6 yes Figure 5 A cross-sectional view of the first object when it is located at the starting point of the first object's movement.

[0049] Figure 7 yes Figure 5 A cross-sectional view of the first object located in the second path;

[0050] Figure 8 yes Figure 3 Exploded view of the intermediate pressure plate assembly;

[0051] Figure 9 yes Figure 3 A schematic diagram of the three-dimensional structure of the central top block;

[0052] Figure 10 yes Figure 3 Schematic diagram of the connection structure between the middle and top blocks of the cylinder;

[0053] Figure 11 yes Figure 1 A schematic diagram of the planar structure of the first embodiment of the punch demolding device;

[0054] Figure 12 yes Figure 11 A cross-sectional view;

[0055] Figure 13 yes Figure 11 A schematic diagram of the decomposed structure;

[0056] Figure 14 yes Figure 11 A three-dimensional structural diagram of the demolding head pressure plate;

[0057] Figure 15 yes Figure 11 Exploded view of the demolding head and gun nose;

[0058] Figure 16 yes Figure 15 A cross-sectional view;

[0059] Figure 17 yes Figure 15 A three-dimensional structural diagram of the nose of a gun;

[0060] Figure 18 yes Figure 11 A three-dimensional structural diagram of the ejector head, gun nose, and punch.

[0061] Figure 19 yes Figure 18 A cross-sectional view;

[0062] Figure 20 yes Figure 18 A three-dimensional structural diagram of a medium-light load spring block;

[0063] Figure 21 Figure 20 The sectional view is;

[0064] Figure 22 yes Figure 18 A three-dimensional structural diagram of a medium-to-heavy-duty spring pressure block;

[0065] Figure 23 yes Figure 22 A cross-sectional view;

[0066] Figure 24 yes Figure 1 A three-dimensional structural diagram of the demolding head, gun nose, and punch of the second embodiment of the punch demolding device;

[0067] Figure 25 yes Figure 24 A schematic diagram of the decomposed structure;

[0068] Figure 26 yes Figure 24 A three-dimensional structural diagram of the gun nose and mounting section;

[0069] Figure 27 yes Figure 1 A schematic diagram of the planar structure of the demolding head, gun nose, and punch in the third embodiment of the punch demolding device;

[0070] Figure 28 yes Figure 27 A cross-sectional view;

[0071] Figure 29 yes Figure 27 A three-dimensional structural diagram of a medium-light load spring block;

[0072] Figure 30 yes Figure 1 A three-dimensional structural diagram of the demolding head, gun nose, and punch in the fourth embodiment of the punch demolding device:

[0073] Figure Labels

[0074] 100. Rivet conveyor; 200. First part; 300. Second part; 400. Third part; 500. Punch ejector;

[0075] 1. Pressure plate assembly; 11. First path; 111. Starting point of first object movement; 112. Ending point of first object movement; 113. Alignment space; 12. Second path; 13. Third path; 131. Exit of third path; 132. Starting point of second object movement; 133. Ending point of second object movement; 14. First pressure plate; 141. First upper protrusion; 1411. First partition space; 142. First lower protrusion; 143. First top protrusion; 15. Second pressure plate; 151. Second upper protrusion; 1511. Second partition space; 152. Second lower protrusion; 16. Third pressure plate; 17. Fourth pressure plate; 171. Clamping space; 18. Pressure plate connector;

[0076] 2. Top block; 21. First layer structure; 22. Second layer structure; 23. Fixing block; 24. Limiting structure; 241. Front limiting component; 242. Limiting connector; 25. Limiting space; 26. Top block cylinder; 261. Snap-fit ​​component; 27. Snap-fit ​​groove;

[0077] 3. Push rod; 31. Push rod cylinder; 32. Push rod connecting plate; 33. Stabilizer bar;

[0078] 4. Fixing base; 41. Fixing base cover plate; 42. Mounting groove; 43. Nail feeding path; 44. Nail feeding tube; 45. Locking cap; 46. Locking ring;

[0079] 51. Drive structure; 52. Elastic limiting structure; 53. Accommodation space; 54. Magnetic suction structure; 55. Fixing plate; 56. Mounting component; 57. Guide block;

[0080] 6. Demolding head; 61. Demolding channel; 611. First demolding channel; 612. Second demolding channel; 613. Third demolding channel; 62. Lower part of demolding head; 63. Upper part of demolding head; 64. Annular stepped structure; 65. Protruding structure; 651. Slot; 652. Snap-fit ​​part; 66. Drive piston rod; 661. First cavity; 662. Bottom wall; 663. Pad; 67. Demolding head pressure plate; 671. Pressure plate protrusion; 68. Guide structure; 691. Insertion protrusion; 692. Second mounting hole; 693. Spring clearance through hole;

[0081] 7. Nose; 71. Straight channel of nose; 711. Mounting hole for limiting component; 72. Side channel of nose; 721. Engaging part; 73. Elastic limiting component; 731. Limiting component; 732. Tensioning ring; 74. Mounting part; 741. First mounting hole; 742. Positioning recess; 75. Insertion cavity; 76. Engaging through hole; 77. Insertion recess;

[0082] 8. Punch; 81. Lower part of punch; 82. Middle part of punch; 83. Upper part of punch; 84. First transition section; 85. Second transition section;

[0083] 91. Heavy-duty spring; 92. Light-duty spring; 93. Heavy-duty spring block; 931. Third recess; 932. Fourth recess; 933. Fourth through hole; 934. Blind hole; 94. Light-duty spring block; 941. First recess; 942. Second recess; 943. Vent hole; 944. Protrusion; 945. Groove structure; 946. First through hole; 947. Second through hole; 948. Third through hole. Detailed Implementation

[0084] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0085] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature, and in the description of this invention, "a number" means two or more, unless otherwise explicitly specified.

[0086] In this invention, unless otherwise explicitly specified and limited, the terms "assembly," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0087] The invention will be further described below with reference to the accompanying drawings and specific embodiments. The following description is merely exemplary and does not limit the scope of protection of the invention.

[0088] like Figure 1-30 As shown, a planar self-piercing riveting structure includes a punch ejector 500 with a nose-side channel 72; a rivet conveyor 100, comprising a pressure plate assembly 1 and a top block 2, the pressure plate assembly 1 abutting against the nose-side channel 72; the pressure plate assembly 1 having a first path 11, a second path 12, and a third path 13, the first path 11 being connected to the third path 13 via the second path 12; the top block 2 having a first layer structure 21 and a second layer structure 22 spaced at predetermined intervals and facing the same direction, the first layer structure 21 and the second layer structure 22 being capable of synchronously reciprocating within the first path 11 and the third path 13, respectively. The first layer structure 21 applies a first force to a first object 200 entering the first path 11, and after moving a certain distance within the first path 11, the first object 200 moves into the second path 12. At the same time, the second layer structure 22 applies a second force to the second object 300 that enters the third path 13 from the second path 12. After moving a certain distance in the third path 13, the second object 300 moves from the third path 13 to the nose-side channel 72.

[0089] I. The structure of the rivet conveyor 100 is as follows:

[0090] like Figure 3-10As shown, in this embodiment, on the vertical projection plane, the projection of the first path 11 is located above the projection of the third path 13 and is offset from it. Specifically, the first path 11 and the third path 13 are arranged parallel to each other vertically and offset from each other. The second path 12 is arranged between the first path 11 and the third path 13, preferably vertically between them, or it can be arranged at an angle between them. The cross-sectional dimension of the first layer structure 21 is less than or equal to the cross-sectional dimension of the first path 11, and the cross-sectional dimension of the second layer structure 22 is less than or equal to the cross-sectional dimension of the third path 13. The predetermined distance between the first layer structure 21 and the second layer structure 22 is the same as the interval between the first path 11 and the third path 13. The advantage of this design is that the first layer structure 21 and the second layer structure 22 can move freely and synchronously back and forth within the first path 11 and the third path 13 respectively, without any obstruction. It should be noted that the cross-sections of the second path 12 and the third path 13 can be cylindrical, elliptical, square or other shapes, and users can choose according to their needs. This invention is not limited to these shapes.

[0091] Please refer to Figure 5 Specifically, a starting point position 111 and an ending point position 112 for the first object are set on the first path 11. The starting point position 111 is set on the first path 11 and is the first position where the first object stops when it enters the first path 11. The ending point position 112 is a specific position on the first path 11 that is on the same vertical plane as the second path 12.

[0092] A second object movement starting point position 132 and a second object movement ending point position 133 are provided on the third path 13. Specifically, the second object movement starting point position 132 is a specific position located on the third path 13 and on the same vertical plane as the second path 12, and the second object movement ending point position 133 is a specific position located on the third path 13 and at a predetermined distance from the exit 131 of the third path. One end of the second path 12 is connected to the first object movement ending point position 112 of the first path 11, and the other end of the second path 12 is connected to the second object movement starting point position 132 of the third path 13, that is, the first object movement ending point position 112, the second path 12, and the second object movement starting point position 132 are on the same vertical plane. The length of the second path 12 is basically the same as the interval distance between the first layer structure 21 and the second layer structure 22.

[0093] According to the above, the complete movement process of a first object 200 is as follows: the first object moves from the starting position 111, the first object moves to the ending position 112, the second path 12, the second object moves from the starting position 132, and finally the first object 200 is pushed to the second object moves to the ending position 133.

[0094] Preferably, the height of the third path 13 is approximately 1.03 times the height of the first object 200, and the width of the second path 12 is approximately 1.10 times the width of the first object 200. This is merely an example, and the embodiment is not limited thereto. This relatively small height and width difference ensures that the first object 200 does not have excessive room to rotate in the third path 13 and the second path 12, thereby reducing the likelihood of the first object 200 flipping or getting stuck when moving in the third path and the second path 12.

[0095] Please refer to Figure 8 In this embodiment, the pressure plate assembly 1 includes a first pressure plate 14, a second pressure plate 15, a third pressure plate 16 and a fourth pressure plate 17, with the first pressure plate 14 and the second pressure plate 15 connected on opposite sides.

[0096] Specifically, a first upper protrusion 141 and a first lower protrusion 142 are provided on the first pressure plate 14 at a predetermined distance. The first lower protrusion 142 is located below the first upper protrusion 141, and the length of the first lower protrusion 142 is substantially the same as the length of the first upper protrusion 141. A second upper protrusion 151 and a second lower protrusion 152 are provided on the second pressure plate 15 at a predetermined distance. The second lower protrusion 152 is located below the second upper protrusion 151, and the length of the second lower protrusion 152 is substantially the same as the length of the second upper protrusion 151. Furthermore, the shape and size of the first upper protrusion 141 are substantially the same as the shape and size of the second upper protrusion 151, and the shape and size of the first lower protrusion 142 are substantially the same as the shape and size of the second lower protrusion 152.

[0097] Specifically, the first upper protrusion 141 is recessed to form a first partition space 1411, and the second upper protrusion 151 is recessed to form a second partition space 1511. The first upper protrusion 141 and the second upper protrusion 151 are symmetrically arranged (the first partition space 1411 is also symmetrical to the second partition space 1511), and the first lower protrusion 142 and the second lower protrusion 152 are symmetrically arranged. When the first upper protrusion 141 and the second upper protrusion 151 abut, and when the first lower protrusion 142 and the second lower protrusion 152 abut, they together form a third path arranged in a channel shape. At the same time, the first partition space 1411 and the second partition space 1511 abut together to form a second path 12 arranged in a channel shape.

[0098] More specifically, a first top surface protrusion 143 is provided on the top surface of the first pressure plate 14, which is perpendicular to the first upper protrusion 141. The third pressure plate 16 and the fourth pressure plate 17 are connected by a pressure plate connector 18. When the third pressure plate 16 and the fourth pressure plate 17 are connected, the first pressure plate 14 and the second pressure plate 15 are sandwiched in the middle, and the first top surface protrusion 143, the first upper protrusion 141 and the second upper protrusion 151 are combined to form a groove-shaped groove, which is parallel to the first path 11 of the third path 13.

[0099] Setting the pressure plate assembly 1 to a detachable installation method makes it easier to maintain the rivet conveyor 100 later. Furthermore, the front end of the third pressure plate 16 (the end near the third path outlet 131) is arc-shaped, and the fourth pressure plate 17 is arc-shaped as a whole, so that when the third pressure plate 16 and the fourth pressure plate 17 abut, the two arc-shaped surfaces abut to form a clamping space 171, which can be used to clamp the rivet conveyor 100 onto the punch ejector 500.

[0100] In this embodiment, the top block 2 also includes a fixing block 23 (see [link to documentation]). Figure 9 One end of the first layer structure 21 and one end of the second layer structure 22 are both set on the first end of the fixing block 23, and the first layer structure 21, the fixing block 23 and the second layer structure 22 are arranged in a U-shape, wherein the length of the first layer structure 21 is less than the length of the second layer structure 22.

[0101] Specifically, such as Figure 5 As shown, in the vertical plane, the difference between the length of the first layer structure 21 and the length of the second layer structure 22 is set as Y, and the width of the second path 12 is set as X. Then X is less than Y, so as to ensure that when the first layer structure 21 pushes the first object 200 in the first path 11 to the first object's movement endpoint position 112 and enters the second path 12, the second layer structure 22 is located at the exit of the second path 12. The second layer structure 22 blocks the exit of the second path 12, and the first object 200 is placed on the second layer structure 22, that is, the first object 200 can be temporarily stored in the second path 12.

[0102] Furthermore, a limiting structure 24 is provided at the other end of the first layer structure 21. The first object 200 falls into the limiting structure 24. Under the first force, the first object 200 located in the limiting structure 24 moves from the starting position 111 of the first object movement on the first path 11 to the ending position 112 of the first object movement.

[0103] Specifically, the limiting structure 24 includes a front limiting member 241 and a limiting connector 242 (see [link]). Figure 9As shown, the front limiting member 241 is connected to the end of the first layer structure 21 via the limiting connector 242. A limiting space 25 is formed between the front limiting member 241, the limiting connector 242, and the end of the first layer structure 21. The cross-section of the limiting space 25 can be cylindrical, elliptical, square, or other shapes. The accommodating size of the limiting space 25 is basically consistent with the size of the first object 200 to ensure that the first object 200 does not have too much space to move within the limiting space 25. This further reduces the probability of the first object 200 rubbing against the edge of the first path 11 and causing it to flip over when pushed by the first layer structure 21.

[0104] When working, after the first object 200 enters the first path 11, it will fall into the limiting space 25. Under the force applied by the first layer structure 21, the limiting structure 24 is equivalent to being able to move the first object 200 from the starting position 111 to the ending position 112 in a clamping manner.

[0105] Furthermore, in order to ensure that the limiting space 25 can accurately move to the first object's moving endpoint position 112, an alignment space 113 is provided on one side of the first object's moving endpoint position 112 in the first path 11. The width of the alignment space 113 is the same as the width of the front limiting member 241. When the first layer structure 21 moves the first object 200 in the first path 11, and the front limiting member 241 can just completely overlap with the alignment space 113, the limiting space 25 can accurately reach the first object's moving endpoint position 112. That is, at this time, the limiting space 25 can be completely connected with the opening of the first path 11, thereby facilitating the first object 200 to enter the second path 12 from the limiting space 25. It should be noted that the size of the limiting space 25 is basically the same as the size of the second path 12.

[0106] In this embodiment, the rivet feeder 100 also includes a push rod 3 (see [link to previous embodiment]). Figure 5 , 6As shown in Figure 10, the interior of the second layer structure 22 is a hollow structure (not shown in the figure), and the push rod 3 is located in the hollow structure. When the second object 300 moves to the second object's movement endpoint position 133 in the third path 13, due to the certain distance from the third path exit 131, the second object 300 cannot enter the nose-side channel 72. At this time, the push rod 3 can extend from the hollow structure of the second layer structure 22 and move the second object 300 from the second object's movement endpoint position 133 towards the third path exit 131 until the second object 300 moves into the nose-side channel 72. That is to say, when the length of the second layer structure 22 is insufficient to push the first object 200 into the nose-side channel 72 (the movement distance of the second layer structure 22 is less than the length of the third path 13), the push rod 3 extends from the interior of the second layer structure 22 and pushes the first object 200 from the second object's movement endpoint position 133 into the nose-side channel 72.

[0107] In this embodiment, the first object 200 and the second object 300 can be rivets or screws or other riveting components. Users can choose the specific structure of the first object 200 and the second object 300 as needed, and the present invention is not limited thereto.

[0108] The first object 200 and the second object 300 have the same structure and are both made of metal. The structure of the first object 200 will be described below using it as an example. When viewed in a vertical cross-section, the dimensions at both ends of the first object 200 are larger than its central dimension. That is, the central part of the first object 200 is concave (arc-shaped), and its dimensions gradually decrease from its upper end to its central part (smooth), while its dimensions gradually increase from its central part to its lower end (smooth). Therefore, in this embodiment, the pusher of the push rod 3 has a concave arc-shaped surface. When the push rod 3 pushes the second object 300, this arc-shaped surface fits tightly against the central part of the second object 300, allowing for better pushing of the second object 300 and reducing the likelihood of the second object 300 flipping or getting stuck due to friction with the third path 13 during the pushing process. It should be noted that, in addition to the structure described above, the head shape of the push rod 3 can also be a flat or curved surface. The above is just an example, and the present invention is not limited thereto.

[0109] In this embodiment, the rivet conveyor 100 further includes a top block cylinder 26 and a top rod cylinder 31 for driving the top block 2 and the top rod 3 to move. The top block cylinder 26 is disposed on the outer wall of the first pressure plate 14, and its driving end is connected to the fixed block 23. The specific connection method is as follows: the driving end of the top block cylinder 26 is provided with a vertically oriented "I"-shaped snap-fit ​​component 261, i.e., the snap-fit ​​component 261 has a structure with larger dimensions at both ends and a smaller dimension in the middle. The fixed block 23 is provided with a slot 27 that matches the "I"-shaped snap-fit ​​component 261. The "I"-shaped snap-fit ​​component 261 is snapped into the slot 27, with the middle portion of the snap-fit ​​component 261 located in the slot 27 and the two ends of the snap-fit ​​component 261 located at the two ends of the slot 27. This allows the snap-fit ​​component 261 to be detachably connected to the fixed block 23, thus enabling the top block 2 to move back and forth via the top block cylinder 26.

[0110] Please see Figure 5 , 6 7. 10. The push rod cylinder 31 is embedded in the countersunk hole on the other end face of the fixed block 23. The driving end of the push rod cylinder 31 extends out of the fixed block 23 and is connected to the push rod 3 through a push rod connecting plate 32. To enable the push rod cylinder 31 to drive the push rod 3 to reciprocate in the second layer structure 22 more stably, a second countersunk hole is provided on the fixed block 23. A stabilizing rod 33 is provided in the second countersunk hole. One end of the stabilizing rod 33 is fixed to the push rod connecting plate 32, and the diameter of the other end of the stabilizing rod 33 matches the diameter of the countersunk hole. The stabilizing rod 33 can move in the second countersunk hole under the drive of the push rod cylinder 31. Specifically, the stabilizing rod 33 and the push rod 3 are symmetrically arranged relative to the driving end of the push rod cylinder 31. When the push rod cylinder 31 is working, the stabilizing rod 33 and the push rod 3 move synchronously back and forth.

[0111] Please see Figure 3-7 In this embodiment, the rivet conveyor 100 further includes a fixing seat 4 and a fixing seat cover plate 41 disposed on the side of the fixing seat 4. The bottom of the fixing seat 4 is recessed to form a mounting groove 42, the length direction of which is consistent with the movement direction of the first object 200 in the first path 11. The size of the mounting groove 42 matches the size of the top end of the third pressure plate 16. By engaging the mounting groove 42 with the top end of the third pressure plate 16 and abutting the fixing seat cover plate 41 against the first top surface protrusion 143, the fixing seat 4 can be fixedly disposed on the top surface of the pressure plate assembly 1.

[0112] Under the action of the above structure, the fixing seat 4, fixing seat cover 41, first top surface protrusion 143, first upper layer protrusion 141, second upper layer protrusion 151, and third pressure plate 16 together form a channel-shaped first path 11 (equivalent to the first path 11 changing from the original groove shape to a channel shape after the fixing seat 4 and fixing seat cover 41 are set on the pressure plate assembly 1). Compared with the groove-shaped first path 11, the channel-shaped first path 11 can make the movement direction of the first object 200 when the first layer structure 21 moves more accurately, and avoid the first object 200 deviating from the original movement path.

[0113] Please see Figure 5-7 In this embodiment, the fixing base 4 is provided with a nail feeding path 43, which is connected to the first path 11. In the initial state, when the first object 200 moves from the nail feeding path 43 to the first path 11, one end opening of the limiting space 25 of the first layer structure 21 is exactly connected to the nail feeding path 43 (that is, ensuring that the first object 200 can fall into the limiting space 25). Specifically, in this embodiment, the nail feeding path 43 is formed by the fixing base 4 and the fixing base cover plate 41.

[0114] It should be noted that the rivet conveyor 100 also involves a third object 400 in the actual operation process. The third object 400 is no different in shape and size from the second object 300 or the first object 200.

[0115] The rivet feeder 100 also includes a rivet feeding tube 44 and a locking cap 45. The rivet feeding tube 44 passes through the locking cap 45 and extends into the interior of the fixed base 4, communicating with the rivet feeding path 43. The locking cap 45 is mounted on the fixed base 4, and the locking ring 46 inside the locking cap 45 can press the rivet feeding tube 44 against it. Of course, the locking cap 45 and the locking ring 46 can also be used to tighten the rivet feeding tube 44 by means of buckles, expansion sleeves, etc., and are not limited to these. Specifically, the rivet feeding tube 44 uses air supply to feed the third object 400 into the rivet feeding path 43.

[0116] It should be noted that the first object 200, the second object 300, and the third object 400 are not different; they are simply used to better distinguish the objects (here, "objects" refers to the first object 200, the second object 300, and the third object 400 collectively) as they move in different positions, thus facilitating better explanation. Specifically, the object within the distance from the nail feeding tube 44 to the nail feeding path 43 is represented by the third object 400. The object within the distance from the nail feeding path 43 to the second path 12 is represented by the first object 200, and the object within the distance from the second path 12 to the exit point 131 of the third path is represented by the second object 300.

[0117] The third object 400 falls into the limiting space 25 of the first layer structure 21. The first layer structure 21 pushes the first object 200 (here, the first object 200 is the third object 400 that entered the first path 11 from the first object's starting position 111 to the first object's ending position 112. Then, the first layer structure 21 of the top block 2 will block the feeding path 43, and at the same time, the second layer structure 22 of the top block 2 will block the exit of the second path 12. At this time, the third object 400 (the third object 400 appears again because the feeding tube 44 feeds another object into the feeding path 43, and this object is the third object 400) will be temporarily stored in the feeding path 43, and the first object 200 will be temporarily stored in the second path 12, waiting for the next operation.

[0118] Preferably, the rivet conveyor 100 further includes a drive structure 51, which, like the rivet feeding path 43, is composed of a fixed base 4 and a fixed base cover plate 41. After the first object 200 moves from the starting position 111 to the ending position 112, the drive structure 51 applies a third force to the first object 200, pushing it into the second path 12.

[0119] In this embodiment, the driving structure 51 is disposed inside the fixed base 4. Specifically, the driving structure 51 is a gas flow channel. The air inlet of the gas flow channel is connected to the nail feeding tube 44, thereby enabling the supply of gas. The air outlet of the gas flow channel is connected to the first path 11, and the air outlet of the gas flow channel, the first object movement endpoint position 112, and the second path 12 are all located on the same vertical plane and connected. When the first layer structure 21 pushes the first object 200 to the entrance of the second path 12 (i.e., the first object movement endpoint position 112), and because the limiting space 25 drives the first object 200 to move in a clamping manner, under this premise, in order to ensure that the first object 200 can definitely get rid of the clamping of the limiting space 25 and enter the second path 12, the driving structure 51 sprays gas (third force) to push the first object 200 into the second path 12. Of course, the drive structure 51 may not be composed of the fixed seat 4 and the fixed seat cover 41. The drive structure 51 may also be located externally and the air outlet is connected to the first path 11.

[0120] Preferably, on the one hand, since this embodiment uses air compression to transport the first object 200 from the feed tube 44 to the pressure plate assembly 1, this air compression will cause airflow in the feed path 43, the first path 11, the second path 12, and the third path 13 inside the rivet conveyor 100, which may cause the object to flow back. On the other hand, when the angle at which the rivet conveyor 100 is positioned causes the intended direction of movement of the object to be inconsistent with the actual direction of movement of the object, the object will also flow back.

[0121] To prevent the third object 400 and the first object 200, which are temporarily stored in the rivet feeding path and the second path 12, from flowing back, the rivet conveyor 100 also includes an elastic limiting structure 52, which is disposed in the rivet feeding path 43 and the second path 12 to lock the third object 400 and the first object 200 in the rivet feeding path 43 and the second path 12 respectively.

[0122] Specifically, to better fit the central shape of the first object 200 (and the third object 400) (larger dimensions at both ends and smaller dimensions in the middle), the vertical cross-section of the head of the elastic limiting structure 52 is triangular, and the tail of the elastic limiting structure 52 is provided with a countersunk hole that abuts against one end of the spring. Receiving spaces 53 for accommodating the elastic limiting structure 52 are provided in both the feeding path 43 and the second path 12. The tail of the elastic limiting structure 52 is entirely placed in the receiving space 53, and the other end of the spring abuts against the receiving space 53. The head of the elastic limiting structure 52 extends from the receiving space 53, and the inclined surface of the head faces the entrance of the feeding path 43 and the second path 12 to lock the corresponding third object 400 and first object 200. Only when the third object 400 and the first object 200 are subjected to sufficiently large forces can the third object 400 and the first object 200 respectively squeeze the head of the elastic limiting structure 52, causing the spring at the tail of the elastic limiting structure 52 to compress, thereby breaking free from the obstruction of the elastic limiting structure 52 and entering the first path 11 and the third path 13 respectively.

[0123] It should be noted that, in this embodiment, the aforementioned sufficiently large force can specifically be the force exerted on the first object 200 by the gas ejected from the nail feeding tube 44 and the driving structure 51. In this case, the nail feeding tube 44 and the driving structure 51 each need to eject gas four times to act on the first object 200.

[0124] Specifically, the first gas ejection from the feeding tube 44 occurs after the third object 400 enters the feeding path 43 from the feeding tube 44, with the purpose of engaging the third object 400 into the elastic limiting structure 52. The second gas ejection aims to free the third object from the elastic limiting structure 52 and into the limiting space 25. The third gas ejection occurs when the first object 200 is pushed to the first object's movement endpoint position 112 by the first layer structure 21. The gas ejects from the feeding tube 44 along the drive structure 51, acting on the first object 200, with the purpose of transporting the first object 200 from the limiting space 25 into the second path 12 and engaging it into the elastic limiting structure 52. The fourth gas ejection aims to allow the gas to act on the first object 200 again along the drive structure 51, freeing the first object 200 from the limiting structure 6 and pushing it into the third path 13.

[0125] Preferably, after the first object 200 and the second object 300 enter the first path 11 and the third path 13 respectively, they may also flow backward (for the same reasons as described above). Therefore, in this embodiment, magnetic attraction structures 54 are provided in both the first path 11 and the third path 13. Specifically, the first magnetic attraction structure 54 is located on the same vertical plane as the nail feeding path 43, and the second magnetic attraction structure 54 is located on the same vertical plane as the second path 12. When the first object 200 and the second object 300 break free from the obstruction of the elastic limiting structure 52 and enter the first path 11 and the third path 13 respectively, the two magnetic attraction structures 54 will attract the two second objects 300 respectively to prevent them from flowing backward. In this embodiment, the magnetic attraction structure 54 is set as a magnet.

[0126] In this embodiment, in order to better protect the position of the rivet feeding tube 44 and the fixed rivet conveyor 100, the rivet conveyor 100 also includes a fixing plate 55, a mounting member 56 and a guide block 57.

[0127] The aforementioned fixing plates 55 are installed on the symmetrical outer walls of the fixing base 4. The two fixing plates 55 are connected to each other, and the entire rivet feeding tube 44 is located between the two fixing plates 55 to achieve a protective effect. The front end and rear end of the fixing plates 55 are set at an angle; specifically, the rear end of the fixing plates 55 is set vertically. A mounting member 56 is provided at the rear end of the fixing plates 55, through which the fixing plates 55 can be installed in the required position. Specifically, in practical applications, a guide shaft (not shown) should pass through the mounting member 56 so that the entire rivet feeder 100 can always move in the opposite direction along the length of the guide shaft during movement, avoiding severe shaking.

[0128] Preferably, guide blocks 57 are provided opposite to each other at the connection between the front and rear ends of the two fixing plates 55. These guide blocks 57 have guide grooves (not shown in the figure) whose dimensions match the dimensions of the rivet feeding tube 44. When the two fixing plates 55 abut, the two guide grooves simultaneously fit the rivet feeding tube 44, thus setting the rivet feeding tube 44 to a structure substantially identical to that of the fixing plates 55 (i.e., the front and rear ends are angled). Specifically, in this embodiment, the angle between the front and rear ends of the guide groove in the guide block 57 is set at 150 degrees, thereby changing the turning radius of the rivet feeding tube 44. Of course, the angle is not limited to the aforementioned 150 degrees; other angles can also be used. Specifically, guide blocks 57 with different front and rear angles can be selected according to the required placement position of the entire rivet conveyor 100 to adjust the turning radius of the rivet feeding tube 44.

[0129] II. The structure of the punch ejector 500 is as follows:

[0130] Please refer to Figure 11-30 In this embodiment, the punch demolding device 500 includes a demolding head 6, a gun nose 7 detachably disposed at the lower end of the demolding head 6, a demolding channel 61 disposed inside the demolding head 6, and a gun nose straight channel 71 disposed inside the gun nose 7 communicating with the demolding channel 61; a punch 8 disposed inside the demolding head 6, and the punch 8 can move up and down in the demolding channel 61 and the gun nose straight channel 71; a heavy-duty spring 91 and at least one light-duty spring 92, which are sequentially sleeved on the punch 8; during demolding, the heavy-duty spring 91 and at least one light-duty spring 92 are squeezed to apply force to the demolding head 6, so that the gun nose 7 presses tightly against the riveted material.

[0131] In this embodiment, the demolding head 6 is divided into a lower demolding head 62 and an upper demolding head 63. The upper demolding head 63 is cylindrical, and the two side walls of the lower demolding head 62 are arc-shaped, wider at the top and narrower at the bottom. This design provides a smooth connection between the lower demolding head 62 and the upper demolding head 63. The lower demolding head 62 protrudes outward to form a protruding structure 65, which is a hollow column. The side walls of the protruding structure 65 are further recessed to form two centrally symmetrical and laterally arranged slots 651, which are arc-shaped. At least one guide structure 68 is formed recessed along the central axis on the outer wall of the demolding head 6. The guide structure 68 is keyway-shaped.

[0132] Specifically, in this embodiment, two guide structures 68 are provided, and the two guide structures 68 are symmetrically arranged on the outer wall of the demolding head 6.

[0133] Please refer to Figure 16Furthermore, the demolding channel 61 inside the demolding head 6 is divided into a first demolding channel 611, a second demolding channel 612, and a third demolding channel 613 that are connected in sequence. Specifically, the demolding channel 61 located at the lower part 62 of the demolding head is the first demolding channel 611. An annular step structure 64 is provided in the demolding channel 61 at the upper part 63 of the demolding head, which divides the demolding channel 61 at the upper part 63 of the demolding head 61 into the second demolding channel 612 and the third demolding channel 613. The diameters of the first demolding channel 611, the second demolding channel 612, and the third demolding channel 613 increase sequentially. Specifically, the diameter of the third demolding channel 613 is approximately 1.20 times the diameter of the second demolding channel 612, and the diameter of the second demolding channel 612 is approximately 3.34 times the diameter of the first demolding channel 611. This is just an example, and this embodiment is not limited to this.

[0134] It should be noted that, in this embodiment, the annular step structure 64 is specifically formed by the inner wall of the demolding head 6 being recessed. Of course, the annular step structure 64 can also be other partition structures, as long as it can divide the demolding channel 61 of the upper part 63 of the demolding head into two parts with different diameters; this is not limited here.

[0135] In this embodiment, the nose of the gun 7 is cylindrical, and a nose side channel 72 is provided through the upper end of the nose of the gun 7. The nose side channel 72 is connected to the nose straight channel 71. The function of the nose side channel 72 is to load the second object 300.

[0136] Further, please refer to Figure 15 Viewed from the opening of the nose-side channel 72, engaging portions 721 are provided on both sides of the nose-side channel 72. The function of these two engaging portions 721 is that the ends of the first pressure plate 14 and the second pressure plate 15 of the rivet conveyor near the third path outlet 131 can be inserted into the nose-side channel 72 until the first pressure plate 14 and the second pressure plate 15 respectively abut against the two engaging portions 721. At this time, the third path outlet 131 of the rivet conveyor 100 can just connect with the nose-side straight channel 71, so that the first object 200 can enter the nose-side straight channel 71 from the rivet conveyor 100.

[0137] Please refer to Figure 16 and Figure 19 In this embodiment, when the angle at which the punch ejector 500 is positioned causes the predetermined direction of movement of the first object 200 to be inconsistent with the actual direction of movement of the first object 200, the first object 200 will backflow. Therefore, the punch ejector 500 also includes an elastic limiting component 73 that can prevent the first object 200 from backflowing. The elastic limiting component 73 is disposed in the nose tube straight channel 71 to prevent the first object 200 from being blown out of the nose tube.

[0138] Specifically, the elastic limiting component 73 includes limiting members 731 and tensioning rings 732. In this embodiment, there are four limiting members 731, but there could also be two, three, five, etc. This is just an example, and this embodiment is not limited to this. Viewed in the vertical cross-section of each limiting member 731, the tail of each limiting member 731 is rectangular, and the head of each limiting member 731 is semi-elliptical (of course, the limiting member 731 could also be a steel ball or a ball-head plunger). Four limiting member mounting holes 711 are provided through the lower end of the nose 7, and the four limiting member mounting holes 711 are spaced equidistantly. The four limiting member mounting holes 711 are located on the same plane, and the vertical cross-section of each limiting member mounting hole 711 is semi-convex.

[0139] The limiting member 731 is disposed in the limiting member mounting hole 711, and the head of the limiting member 731 can extend into the nose tube straight channel 71. When the stepped portion of the tail of the limiting member 731 abuts against the stepped portion of the limiting member mounting hole 711, the limiting member 731 can be disposed in the limiting member mounting hole 711 by using a tensioning ring 732 fitted onto the tail of the limiting member 731.

[0140] Because the middle part of the second object 300 is concave (arc-shaped) when viewed vertically, the bending angle of the head of the limiting member 731 is basically consistent with the bending degree from the middle part to the upper end (or from the middle part to the lower end) of the second object 300. When the heads of both limiting members 731 are simultaneously engaged in the waist position of the second object 300, and without an external force sufficient to open the tension ring 732, the elasticity of the tension ring 732 allows the heads of the limiting members 731 to remain engaged with the second object 300. Only when the punch 8 continuously pushes the second object 300, causing the tension ring 732 to open, can the second object 300 break free from the engagement of the limiting members 731 and move to the exit of the nose channel 71. Then the punch 8 returns to its initial position, and the elasticity of the tension ring 732 causes the limiting member 731 to extend into the nose channel 71 again, preparing for the engagement of the next second object 300.

[0141] Please refer to Figure 19In this embodiment, to further improve the anti-backflow capability of the punch ejector 500, the punch ejector 500 also includes a magnetic attraction structure 54, which is disposed in the nose straight channel 71. Specifically, in this embodiment, there are two magnetic attraction structures 54, located on the same vertical plane. One magnetic attraction structure 54 is positioned directly opposite the nose side channel 72 (i.e., on the same plane as the nose side channel 72), while the other magnetic attraction structure 54 is positioned at a certain distance above the limiting member 731. When the second object 300 enters the nose straight channel 71 from the nose side channel 72, the magnetic attraction structure 54 generates a magnetic attraction force to hold the second object 300, preventing it from flowing back. In this embodiment, the magnetic attraction structure 54 is a magnet, which has the advantage of generating a strong magnetic field and having a lower cost.

[0142] Please refer to Figures 15 to 17 In this embodiment, the demolding head 6 and the nose 7 are detachably connected. Specifically, the connection method is as follows: an insertion cavity 75 is provided at the upper end of the nose 7. Two snap-fit ​​holes 76 are provided horizontally through the upper end of the nose 7, and each snap-fit ​​hole 76 is connected to a slot 651 provided on the protruding structure 65.

[0143] Insert the protruding structure 65 of the lower part 62 of the ejector head into the insertion cavity 75, and insert two snap-fit ​​pieces 652 into the two snap-fit ​​through holes 76 respectively until the middle part of the snap-fit ​​piece 652 engages with the arc-shaped surface of the slot 651. The nose gun 7 can then be installed on the ejector head 6, at which point the nose gun straight channel 71 is connected to the first ejector channel 611. When it is necessary to disassemble the ejector head 6 and the nose gun 7, simply remove the snap-fit ​​piece 652. The advantage of this detachable connection method is that when the ejector head 6 or the nose gun 7 malfunctions or is damaged, it can be quickly replaced or repaired without replacing the entire punch ejector 500, reducing the downtime of the punch ejector 500 and thus lowering maintenance and operating costs. This flexible adjustment method can meet the needs of different customer application scenarios and improve the market competitiveness of the product. In this embodiment, the snap-fit ​​piece 652 is a cylindrical pin.

[0144] Please refer to Figure 13 In this embodiment, the length of the punch 8 is greater than the sum of the lengths of the demolding head 6 and the nose 7. The punch 8 is divided into a lower part 81, a middle part 82, and an upper part 83. The lower part 81, the middle part 82, and the upper part 83 are all cylindrical in design, and the length ratio of the three parts is approximately 8:17:1. ， This is just an example, and this embodiment is not limited to this.

[0145] A first transition section 84 is provided between the lower part 81 and the middle part 82 of the punch, and a second transition section 85 is provided between the middle part 82 and the upper part 83 of the punch. Both the first transition section 84 and the second transition section 85 are arc-shaped, wider at the top and narrower at the bottom, but the lengths of the two sides of the first transition section 84 are much greater than the lengths of the two sides of the second transition section 85. Therefore, visually, the connection between the lower part 81 and the middle part 82 of the punch appears smoother than the connection between the middle part 82 and the upper part 83 of the punch. This design provides a smooth connection between the lower part 81, the middle part 82, and the upper part 83 of the punch.

[0146] The diameter of the lower part 81 of the punch is basically the same as the diameter of the straight channel 71 of the nose of the gun, and the length of the lower part 81 of the punch is greater than the length of the straight channel 71 of the nose of the gun. Therefore, the punch 8 can extend into the straight channel 71 of the nose of the gun and push the second object 300 out of the straight channel 71 of the nose of the gun.

[0147] In this embodiment, the effective number of coils of the light-load spring 92 is greater than that of the heavy-load spring 91, the center diameter of the light-load spring 92 is equal to the center diameter of the heavy-load spring 91 (the center diameter of the light-load spring 92 can also be greater than that of the heavy-load spring 91), and the wire diameter of the light-load spring 92 is equal to that of the heavy-load spring 91 (the wire diameter of the light-load spring 92 can also be smaller than that of the heavy-load spring 91). According to the formula for the elastic coefficient of a compression spring... It can be seen that G is the stiffness modulus of the wire used to make the spring, d is the wire diameter, Nc is the effective number of coils, and Dm is the center diameter of the spring. Combining the above spring data, it can be concluded that the elastic modulus of the heavy-load spring 91 is greater than that of the light-load spring 92 (that is, the heavy-load spring 91 has a greater elastic force, while the light-load spring 92 has a greater compression). When the punch 8 begins to move towards the nose channel 71, because the elastic modulus (stiffness) of the light-load spring 92 is smaller and the elastic modulus (stiffness) of the heavy-load spring 91 is larger, the light-load spring 92 will be more easily compressed, while the heavy-load spring 91 will be more difficult to compress.

[0148] Specifically, the light-load spring 92 is fitted on the end of the punch 8 near the nose 7, and the heavy-load spring 91 is fitted on the end of the punch 8 away from the nose 7. The center diameters of the light-load spring 92 and the heavy-load spring 91 are basically the same as the diameter of the second demolding channel 612, that is, the center diameters of the light-load spring 92 and the heavy-load spring 91 are much larger than the diameter of the first demolding channel 611. Therefore, when the punch 8 moves towards the nose straight channel 71, the light-load spring 92 and the heavy-load spring 91 will be compressed, and the two can be compressed up to the end of the second demolding channel 612, and exert a force on the demolding head 6, so that the nose 7 connected to the demolding head 6 can tightly press the riveted material.

[0149] In summary, as the punch 8 moves toward the nose channel 71, the light-load spring 92 provides a small compressive force to the nose 7 in the initial stage. The nose 7 slides or misaligns during the positioning stage to ensure that the second object 300 is accurately positioned and pre-fixed on the riveted material. When a larger compressive force is needed to further compress the riveted material, the heavy-load spring 91 provides a larger compressive force to ensure that the nose 7 tightly presses against the riveted material. This staged pressure application ensures the accuracy and reliability of the riveting process. The combined use of the light-load spring 92 and the heavy-load spring 91 also reduces the workload of each spring, lowers fatigue and wear on individual springs, and extends the service life of the punch ejector 500. Furthermore, during the operation of the punch ejector 500, the light-load spring 92 effectively mitigates the initial impact force, reducing vibration and noise during operation, while the heavy-load spring 91 provides stable pressure in the later stages, further reducing vibration and noise levels.

[0150] Please refer to Figure 19-23 In this embodiment, the punch ejector 500 further includes a heavy-duty spring block 93 and a light-duty spring block 94, with the heavy-duty spring block 93 being larger than the light-duty spring block 94. The heavy-duty spring block 93 is fitted onto the upper part 83 of the punch, and the upper end of the heavy-duty spring 91 abuts against the heavy-duty spring block 93. The light-duty spring block 94 is fitted onto the middle part 82 of the punch and is located between the upper end of the light-duty spring 92 and the lower end of the heavy-duty spring 91.

[0151] A first recess 941 and a second recess 942 are respectively provided at the upper and lower ends of the light-load spring block 94, and a first through hole 946 is provided in the middle. The first recess 941 communicates with the second recess 942 through the first through hole 946. The lower end of the heavy-load spring 91 is disposed in the first recess 941, and the upper end of the light-load spring 92 is disposed in the second recess 942.

[0152] Specifically, multiple through-holes 943 are provided around the through hole of the light-load spring block 94. In this embodiment, there are four vent holes 943, which are set at the same distance. The purpose of providing the vent holes 943 is twofold: firstly, to release the pressure generated by compressing the light-load spring 92 or to expel air, which is particularly important for the continuous reciprocating motion of the punch 8 in the punch ejector 500, thereby improving the stability and safety of the entire punch ejector 500. Secondly, providing vent holes 943 can reduce the overall mass of the light-load spring block 94, thereby reducing its inertia, improving the rapid response capability of the punch 8, and enhancing the dynamic performance of the entire punch ejector 500.

[0153] A third recess 931 and a fourth recess 932 are respectively provided at the upper and lower ends of the heavy-duty spring block 93, with the diameter of the third recess 931 being smaller than the diameter of the fourth recess 932. A fourth through hole 933 is provided in the middle of the heavy-duty spring block 93, and the third recess 931 communicates with the fourth recess 932 through the fourth through hole 933. The punch 8 passes through the fourth through hole 933, with the upper part 83 of the punch positioned in the third recess 931, and the upper end of the heavy-duty spring 91 positioned in the fourth recess 932.

[0154] Please refer to Figure 19 Specifically, the dimensions of the light-load spring block 94 are basically the same as those of the annular stepped structure 64. Therefore, the light-load spring block 94 can only abut against the annular stepped structure 64 of the demolding channel 61 at most, and cannot enter the second demolding channel 612. Furthermore, the light-load spring block 94 cannot further compress the light-load spring 92, at which point the compression of the light-load spring 92 is at its maximum value. The dimensions of the heavy-load spring block 93 are the same as the dimensions of the end face of the demolding head 6 away from the nozzle 7 (i.e., the upper end face of the demolding head 6). Therefore, when the punch 8 pushes the heavy-load spring block 93 to move, the heavy-load spring block 93 will eventually abut against the end face of the demolding head 6 away from the nozzle 7, and the heavy-load spring block 93 cannot further compress the heavy-load spring 91, at which point the compression of the heavy-load spring 91 reaches its maximum value.

[0155] In general, the light-load spring 92 and the heavy-load spring 91 are separated by the light-load spring block 94 and the heavy-load spring block 93. There is no interference or contact between the light-load spring 92 and the heavy-load spring 91, and both can deform freely within their respective deformation ranges, ensuring that the punch ejector 500 can operate normally.

[0156] Please refer to Figure 12 In this embodiment, the punch ejector 500 also includes a driving device (not shown in the figure). The lower end of the driving piston rod 66 of the driving device is provided with a first cavity 661, and the upper end of the ejector head 6 extends into the first cavity 661 (at this time, the heavy-duty spring block 93, the punch 8, the heavy-duty spring 91, the light-duty spring block 94, and the light-duty spring 92 are also correspondingly arranged in the first cavity 661). A bottom wall 662 is provided in the first cavity 661. When the driving piston rod 66 moves, the bottom wall 662 can abut against the upper part of the punch 83 and push the punch 8 towards the ejector channel 61 and the nose straight channel 71. Specifically, a pad block 663 is also provided between the bottom wall 662 and the upper part of the punch 83 to prevent the driving piston rod 66 from continuously reciprocating and impacting the upper part of the punch 83, thereby causing wear on the upper part of the punch 83.

[0157] It also includes a demolding head pressure plate 67, which is a hollow annular structure, and the inner diameter of the demolding head pressure plate 67 is basically the same as the outer diameter of the demolding head 6. The demolding head pressure plate 67 is sleeved on the demolding head 6 and is detachably connected to the lower end of the drive piston rod 66.

[0158] The ejector head pressure plate 67 can move up and down on the outer wall of the ejector head 6 under the action of the drive piston rod 66. Specifically, at least one pressure plate protrusion 671 is provided on the inner ring of the ejector head pressure plate 67 (see reference). Figure 14 The dimensions of the pressure plate protrusion 671 match the dimensions of the guide structure 68. Therefore, the pressure plate protrusion 671 can move up and down within the guide structure 68 under the drive of the drive piston rod 66. In this embodiment, two pressure plate protrusions 671 are provided.

[0159] Specifically, the guide structure 68 is longer than the nose channel 71. Therefore, when the drive piston rod 66 moves the pressure plate protrusion 671 from the starting point of the guide structure 68 to the other end of the guide structure 68 until it reaches the predetermined end point, the drive piston rod 66 will inevitably be able to push the punch 8 to push the second object 300 to the outlet of the nose channel 71.

[0160] When the drive piston rod 66 presses down and pushes the punch 8 a certain distance, the heavy-duty spring block 93 abuts against the upper end face of the demolding head 6, and the light-duty spring block 94 abuts against the annular stepped structure 64. At this time, both the heavy-duty spring 91 and the light-duty spring 92 reach their maximum compression. Therefore, when the drive piston rod 66 presses down further, the bottom wall 662 of the drive piston rod 66, the pad block 663, the punch 8, and the heavy-duty spring block 93 will abut against each other, which is equivalent to the drive piston rod 66 directly applying force to the demolding head 6, causing the nose 7 to further press the riveted material.

[0161] III. The connection method between the rivet conveyor 100 and the punch ejector 500 is as follows:

[0162] Insert the first pressure plate 14 and the second pressure plate 15 of the rivet conveyor 100 into the nose-side channel 72 of the punch demolding device 500 until the first pressure plate 14 and the second pressure plate 15 abut against the two engaging parts 721. At this time, the third path outlet 131 is connected to the nose straight channel 71, and the nose 7 is just set in the clamping space 171. Finally, the rivet conveyor 100 is installed on the punch demolding device 500.

[0163] The working principle of this invention is described below to provide a better understanding of the invention:

[0164] In the first step, the third object 400 is conveyed from the nail feeding tube 44 to the nail feeding path 43, and under the air jet of the nail feeding tube 44, the elastic limiting structure 52 holds the third object 400 in place.

[0165] In the second step, the nail feeding tube 44 sprays air again, causing the third object 400 to break free from the elastic limiting structure 52 and move towards the first path 11, and fall into the limiting space 25 of the first layer structure 21 of the top block 2 (at this time, the third object 400 transforms into the first object 200).

[0166] Thirdly, under the action of the top block cylinder 26, the first layer structure 21 of the top block 2 moves the first object 200 until the front limiting member 241 of the limiting structure 24 of the first layer structure 21 completely overlaps with the alignment space 113, that is, the limiting space 25 completely overlaps with the end point position 112 of the first object's movement. At this time, the gas flow channel sprays gas to transport the first object 200 to the second path 12. Under the obstruction of the elastic limiting structure 52 and the support of the second layer structure 22, the first object 200 is temporarily stored in the second path 12. At the same time, the third object 400 is transported again from the nail feeding tube 44 to the nail feeding path 43 and is stuck by the elastic limiting structure 52 (consistent with step one).

[0167] In the fourth step, the top block 2 retracts, and the limiting space 25 of the first layer structure 21 is connected to the nail feeding path 43 again. The third object 400 moves into the limiting space 25 of the first layer structure 21 (transforming into the first object 200). The retraction of the second layer structure 22 causes the first object 200, which is temporarily stored in the second path 12, to lose its support force. Under the action of the driving structure 51, it gets rid of the elastic limiting structure 52 and moves to the second object moving starting point position 132 in the third path 13.

[0168] In the fifth step, the top block cylinder 26 and the top rod cylinder 31 operate simultaneously. The second layer structure 22 and the top rod 3 located inside the second layer structure 22 work together to first transport the second object 300 from the starting position 132 to the nose tube straight channel 71. At the same time, the first layer structure 21 moves the first object 200 to the ending position 112. Under the action of the drive structure 51, the first object 200 enters the second path 12 and is locked by the elastic limiting structure 52. Meanwhile, the third object 400 enters the nail feeding path 43 from the nail feeding tube 44 and is locked by the elastic limiting structure 52.

[0169] In the sixth step, the second object 300 is pushed from the third path outlet 131 by the push rod 3 into the nose channel 71, and the magnetic structure 54 holds the second object 300 to prevent it from flowing back.

[0170] In the seventh step, the piston rod 66 begins to move, the bottom wall 662 abuts against the upper part 83 of the punch, and drives the punch 8 to move towards the nose straight channel 71. After the punch 8 moves a certain distance in the nose straight channel 71, it begins to push the second object 300 onto the riveted material. During this process, the light-load spring block 94 compresses the light-load spring 92 until the light-load spring block 94 abuts against the annular stepped structure 64, at which point the light-load spring 92 is compressed to its limit. The heavy-load spring 91 is compressed to a certain length by the heavy-load spring block 93. The combined compressive force of the light-load spring 92 and the heavy-load spring 91 acts on the demolding head 6, and the nose 7 presses the riveted material onto the die assembly.

[0171] In the eighth step, the punch 8 presses down further, and the riveted material begins to tear. At this time, the heavy-duty spring 91 is further compressed, and the light-duty spring 92 and the heavy-duty spring 91 work together to increase the compressive force on the demolding head 6, and the pressure of the demolding head 6 on the riveted material also increases.

[0172] In the ninth step, the piston rod 66 is then driven to continue pressing down, and the punch 8 continues to apply pressure to the second object 300, causing the second object 300 to penetrate into the riveted material. At this time, the heavy-duty spring block 93 abuts against the demolding head 6, and the heavy-duty spring 91 is compressed to its limit. At this time, the bottom wall 662, the upper part of the punch 83, the heavy-duty spring block 93 and the demolding head 6 are in a state of mutual abutment.

[0173] In the tenth step, the driving piston rod 66 pushes the aforementioned abutting components further downward. At this time, the driving piston rod 66 acts directly on the nose of the punch 7. In summary, at this point, the punch ejector 500 uses the downward pressure of the driving piston rod 66 as the primary force, the compressive force of the heavy-duty spring 91 and the light-duty spring 92 acting on the ejector head 6 as the first indirect force, the upward supporting force provided by the die assembly to the riveted material as the second indirect force, and the metallic flow property of the riveted material itself. At this time, the riveted material is subjected to the downward primary force and the first indirect force, as well as the upward second indirect force. Part of the riveted material is squeezed into the middle of the second object 300, thereby achieving a tight riveting between the second object 300 and the riveted material.

[0174] The above description explains how, on the vertical projection plane, the projection of the first path 11 of the rivet conveyor 100 is located above the projection of the third path 13 and is offset from it. The present invention also has a second embodiment, where, on the horizontal projection plane, the projection of the first path 11 is located to one side of the projection of the third path 13 and is offset from it. The difference between the two embodiments lies in the arrangement of the first path 11 and the third path 13: one is arranged vertically offset on the vertical projection plane, and the other is arranged horizontally offset on the horizontal projection plane. Other working principles, technical features, and technical effects are completely the same. Therefore, the embodiment of "arranged horizontally offset on the horizontal projection plane" will not be described in detail here; please refer to the above description for further details.

[0175] Please refer to Figure 24-26 The present invention also includes a third embodiment, which differs from the first embodiment in that the detachable method of the ejector head 6 and the nose 7 of the punch ejector 500 adopts a new method, and multiple light-load springs 92 are provided. Specifically, in this embodiment, the upper end of the nose 7 is provided with a mounting portion 74, and the mounting portion 74 is provided with a plurality of first mounting holes 741, and an insertion recess 77 is formed between the upper end face of the nose 7 and the inner wall of the mounting portion 74. At this time, when viewed from below the central axis of the punch ejector 500, the projection of the nose 7 is located in the middle of the projection of the mounting portion 74, and the first mounting holes 741 are distributed around the projection of the nose 7.

[0176] A insertion protrusion 691 is provided in the middle of the lower end face of the demolding head 6, and second mounting holes 692 corresponding to the first mounting hole 741 are provided around the lower end face of the demolding head 6 with the insertion protrusion 691 as the center. During installation, simply insert the insertion protrusion 691 into the insertion recess 77, use a mounting piece to pass through the first mounting hole 741 and set in the second mounting hole 692, and the gun nose 7 can be installed at the lower end of the demolding head 6.

[0177] Specifically, a second through hole 947 is provided in the middle of the light-load spring pressure block 94, and the light-load spring pressure block 94 is sleeved on the punch 8 through the second through hole 947. Centered on the second through hole 947, a plurality of groove-shaped structures 945 are provided on the lower end face of the light-load spring pressure block 94. Specifically, the upper end face of the light-load spring pressure block 94 is a plane, and the lower end face of the light-load spring pressure block 94 protrudes outward to form a protrusion 944. The outer edge of the protrusion 944 is recessed inward at a predetermined distance to form the aforementioned plurality of groove-shaped structures 945. Correspondingly, a spring clearance through hole 693 is also provided on the lower end face of the demolding head 6. The size of the spring clearance through hole 693 is basically the same as that of the light-load spring 92, and a positioning recess 742 with a size basically the same as that of the spring clearance through hole 693 is correspondingly provided on the mounting part 74.

[0178] When installing the nose 7 and the demolding head 6, the upper end of the light load spring 92 is set in the groove structure 945, and the lower end of the light load spring 92 passes through the spring relief through hole 693 and abuts against the positioning recess 742.

[0179] In summary, setting multiple light-load springs 92 has the following advantages: First, it can further prevent the first object 200 from sliding or misaligning during the positioning stage. Second, multiple light-load springs 92 can more evenly distribute the pressure applied to the workpiece, thereby reducing local stress concentration, reducing the fatigue and wear of individual springs, and extending the service life of the punch ejector 500. Third, the force of the light-load springs 92 is small and easy to control. By adjusting the number and arrangement of the light-load springs 92, precise control of the total pressure can be achieved, improving the quality and consistency of the riveting process. Other technical features and effects are the same as in Embodiment 1, and will not be repeated here.

[0180] Please refer to Figure 27-29 The present invention also includes a fourth embodiment, which differs from the first embodiment in that the structures of the heavy-duty spring block 93 and the light-duty spring block 94 are changed. Specifically, in this embodiment, the light-duty spring block 94 is geometrically shaped (in this embodiment, the light-duty spring block 94 is specifically a flat pad), with a third through hole 948 in the middle, and the punch 8 is disposed in the third through hole. The heavy-duty spring block 93 is columnar, and a blind hole 934 is provided on the lower end face, with the upper part 83 of the punch disposed in the blind hole 934.

[0181] Furthermore, the length ratio between the upper part 83, the middle part 82, and the lower part 81 of the punch in this embodiment has also been changed, and the ratio is approximately 1:1.5:1.1. This is just an example, and this embodiment is not limited thereto.

[0182] This embodiment simplifies the structure of both the heavy-duty spring block 93 and the light-duty spring block 94, significantly reducing their mass. This design has two advantages: firstly, the reduced mass of the heavy-duty and light-duty spring blocks 93 and 94 improves the rapid response capability of the punch 8; secondly, it reduces costs. Other technical features and effects are consistent with Embodiment 1 and will not be repeated here.

[0183] Please refer to Figure 30This invention also includes a fifth embodiment, which differs from the first embodiment in that there is only one guide structure 68 on the outer wall of the demolding head 6, and this guide structure 68 is milled flat. The length of the guide structure 68 is approximately 0.76 times the length of the entire demolding head drive portion 63, and the depth of the guide structure 68 (i.e., the degree to which the guide structure 68 is recessed into the middle of the demolding head) is approximately 0.22 times the diameter of the entire demolding head drive portion 63. This is just an example, and this embodiment is not limited thereto. Specifically, the guide structure 68 is on the same plane as the opening of the nose-side channel 72. By setting the guide structure 68 to a milled flat surface, the direction of the rivet conveyor 100 can be limited when the rivet conveyor 100 is installed. Other technical features and effects are the same as in the first embodiment, and will not be repeated here.

[0184] The present invention provides a first path 11, a second path 12, and a third path 13 that are connected in sequence on the pressure plate assembly 1, and designs the top block 2 as a multi-layer structure. This multi-layer structure moves back and forth in the first path 11 and the third path 13, so that the first object 200 and the second object 300 can move simultaneously in the first path 11 and the third path 13. The first object 200 needs to pass through the second path 12 to enter the third path 13. Before the first object 200 enters the third path 13, the second path 12 is used to temporarily store the first object 200, thereby avoiding collisions and blockages between adjacent first objects 200 and second objects 300.

[0185] Meanwhile, a light-load spring 92 and a heavy-load spring 91 with different elastic coefficients are fitted on the punch 8. When the punch 8 is pressed by the driving piston rod 66 to the riveted material and penetrates into the riveted material, the light-load spring 92 and the heavy-load spring 91 will compress to generate a compressive force. This compressive force will act on the demolding head 6, so that the gun nose 7 connected to the demolding head 6 can tightly press the riveted material. With the further downward pressure of the driving piston rod 66 and the support of the die assembly, the riveted material can fill the waist position of the second object 300 according to its own metal fluidity, thereby completing the entire riveting process.

[0186] This invention is not limited to the above-described embodiments. If any modifications or variations to this invention do not depart from the spirit and scope of this invention, and if such modifications and variations fall within the scope of the claims and equivalent technologies of this invention, then this invention also intends to include such modifications and variations.

Claims

1. A planar self-piercing riveting structure, characterized in that, include: A punch ejector, wherein the punch ejector is provided with a nose-side channel; A rivet conveyor, the rivet conveyor including a pressure plate assembly and a top block, the pressure plate assembly abutting against the nose-side channel; The pressure plate assembly is provided with a first path, a second path, and a third path, with the first path connected to the third path via the second path; the top block includes a first layer structure and a second layer structure spaced at a predetermined distance and facing the same direction, with the first layer structure and the second layer structure moving synchronously back and forth in the first path and the third path, respectively. The first layer structure applies a first force to the first object that enters the first path. After moving a certain distance in the first path, the first object moves into the second path. The second layer structure applies a second force to the second object that enters the third path from the second path. After the second object moves a certain distance in the third path, it moves from the third path to the nose-side channel. The rivet feeder also includes a push rod and an elastic limiting structure; The interior of the second layer structure is hollow, and the top rod is disposed in the hollow structure; If the second object is not moved into the nose-side channel, the push rod extends from the hollow structure and moves the second object from the third path into the nose-side channel. The elastic limiting structure is disposed in the second path.

2. The planar self-piercing riveting structure according to claim 1, characterized in that: The rivet conveyor also includes a mounting base; The mounting base is provided with a nail feeding path, which is connected to the first path.

3. The planar self-piercing riveting structure according to claim 2, characterized in that: The elastic limiting structure is also provided in the nail feeding path.

4. The planar self-piercing riveting structure according to claim 2, characterized in that: The rivet conveyor also includes a magnetic attraction structure, which is disposed at the first object movement starting point position of the first path and / or at the second object movement starting point position of the third path.

5. The planar self-piercing riveting structure according to claim 1 or 2, characterized in that: One end of the second path is connected to the end point of the first object movement in the first path, and the other end of the second path is connected to the starting point of the second object movement in the third path. The length of the second path is basically the same as the distance between the first layer structure and the second layer structure.

6. The planar self-piercing riveting structure according to claim 5, characterized in that: On the vertical projection plane, the projection of the first path is located above the projection of the third path, and they are offset from each other.

7. The planar self-piercing riveting structure according to claim 5, characterized in that: On the horizontal projection plane, the projection of the first path is located on one side of the projection of the third path, and they are offset from each other.

8. The planar self-piercing riveting structure according to claim 1 or 2, characterized in that: The rivet conveyor also includes a drive structure. After the first object moves a certain distance in the first path, the drive structure applies a third force to the first object, and the first object moves into the second path.

9. The planar self-piercing riveting structure according to claim 1, characterized in that: The top block also includes a fixing block, with one end of the first layer structure and one end of the second layer structure disposed on the fixing block.

10. The planar self-piercing riveting structure according to claim 9, characterized in that: The length of the first layer structure is less than or equal to the length of the second layer structure.

11. The planar self-piercing riveting structure according to claim 9, characterized in that: The rivet conveyor also includes a top block cylinder and a top rod cylinder; The top block cylinder is mounted on the pressure plate assembly, and the drive end of the top block cylinder is connected to the top block. The push rod cylinder is mounted on the fixed block, and the drive end of the push rod cylinder is connected to the push rod.

12. The planar self-piercing riveting structure according to claim 9, characterized in that: A limiting structure is provided at the other end of the first layer structure. The first object located in the limiting structure moves from the starting position of the first object movement on the first path to the ending position of the first object movement under the first force.

13. The planar self-piercing riveting structure according to claim 12, characterized in that: The limiting structure includes a front limiting member and a limiting connector. The front limiting member is connected to the end of the first layer structure through the limiting connector. The front limiting member, the limiting connector, and the end of the first layer structure form a limiting space, and the first object is disposed in the limiting space.

14. The planar self-piercing riveting structure according to claim 13, characterized in that: An alignment space is provided on one side of the endpoint of the first object movement along the first path, and the width of the alignment space is approximately the same as the thickness of the front limiting member.

15. The planar self-piercing riveting structure according to claim 1, characterized in that: The punch ejector includes an ejector head, the lower end of which is detachably provided with a gun nose, the ejector head having an ejector channel inside, and the gun nose having a gun nose straight channel communicating with the ejector channel inside. A punch, wherein the punch is disposed inside the demolding head and the punch can move up and down in the demolding channel and the gun nose straight channel; A heavy-duty spring and at least one light-duty spring are sequentially sleeved on the punch. During demolding, the demolding head is subjected to force by squeezing the heavy-duty spring and at least one of the light-duty springs, so that the gun nose presses tightly against the riveted material; The spring constant of the heavy-load spring is greater than that of the light-load spring. The light-load spring is sleeved on the end of the punch near the nose of the gun, and the heavy-load spring is sleeved on the end of the punch away from the nose of the gun.

16. The planar self-piercing riveting structure according to claim 15, characterized in that: The demolding head includes a lower part and an upper part; The demolding channels, from bottom to top, include a first demolding channel, a second demolding channel, and a third demolding channel, with the diameters of the first demolding channel, the second demolding channel, and the third demolding channel increasing sequentially.

17. The planar self-piercing riveting structure according to claim 15, characterized in that: The punch ejector also includes a heavy-duty spring block and a light-duty spring block. The heavy-duty spring block is disposed on the upper part of the punch, and the upper end of the heavy-duty spring abuts against the heavy-duty spring block. The light-duty spring block is sleeved on the middle part of the punch, and the light-duty spring block is located between the lower end of the heavy-duty spring and the upper end of the light-duty spring.

18. The planar self-piercing riveting structure according to claim 17, characterized in that: A first recess and a second recess are respectively provided at the upper and lower ends of the light-load spring block, and a first through hole is provided in the middle of the light-load spring block. The first recess communicates with the second recess through the first through hole.

19. The planar self-piercing riveting structure according to claim 17, characterized in that: A second through hole is provided in the middle of the light-load spring block. With the second through hole as the center, a plurality of groove-shaped structures are provided on the lower end face of the light-load spring block, and the upper end of the light-load spring is disposed in the groove-shaped structures.

20. The planar self-piercing riveting structure according to claim 17, characterized in that: A third through hole is provided in the middle of the lightly loaded spring block.

21. The planar self-piercing riveting structure according to claim 17, characterized in that: A blind hole is provided at the lower end of the heavy-duty spring block, and the upper part of the punch is disposed in the blind hole.

22. The planar self-piercing riveting structure according to claim 17, characterized in that: A third recess and a fourth recess are respectively provided at the upper and lower ends of the heavy-duty spring block, and a fourth through hole is provided in the middle of the heavy-duty spring block. The third recess is connected to the fourth recess through the fourth through hole. The punch is disposed in the fourth through hole, the upper end of the punch is disposed in the third recess, and the upper end of the heavy-duty spring abuts against the fourth recess.

23. The planar self-piercing riveting structure according to claim 15, characterized in that: The punch ejector also includes a flexible limiting component; The elastic limiting component is disposed in the straight channel of the gun nose.

24. The planar self-piercing riveting structure according to claim 15, characterized in that: The punch demolding device also includes a driving device, the lower end of the driving piston rod of the driving device is provided with a first cavity, and the upper end of the demolding head is disposed in the first cavity; When the driving device is working, the bottom wall of the first cavity abuts against the upper part of the punch, driving the demolding head and the punch to move downward.

25. The planar self-piercing riveting structure according to claim 24, characterized in that: The punch ejector also includes an ejector head pressure plate, which is sleeved on the ejector head and is detachably connected to the lower end of the drive piston rod.

26. The planar self-piercing riveting structure according to claim 25, characterized in that: A guide structure is provided on the outer wall of the demolding head along the central axis. The demolding head pressure plate is sleeved on the guide structure. Under the action of the driving piston rod, the demolding head pressure plate moves up and down in the guide structure.

27. The planar self-piercing riveting structure according to claim 26, characterized in that: The guide structure is in the form of a keyway or a milled flat surface.

28. The planar self-piercing riveting structure according to any one of claims 15-27, characterized in that: A slot is provided laterally on the side wall at the lower part of the demolding head; An insertion cavity is provided at the upper end of the nose of the gun, and a snap-fit ​​through hole is provided laterally on the upper side wall of the nose of the gun, the snap-fit ​​through hole passing through the insertion cavity. The lower part of the demolding head is inserted into the insertion cavity, and a snap-fit ​​component is inserted into the snap-fit ​​through hole. The two ends of the snap-fit ​​component are located in the snap-fit ​​through hole, and the middle part of the snap-fit ​​component is located in the snap-fit ​​groove.

29. The planar self-piercing riveting structure according to any one of claims 15-27, characterized in that: The upper end of the nose of the gun is provided with a mounting part, and a plurality of first mounting holes are provided on the mounting part; A plurality of second mounting holes corresponding to a plurality of first mounting holes are provided on the lower end face of the demolding head. One end of a mounting component passes through the first mounting hole and is disposed in the second mounting hole, thereby mounting the gun nose on the lower end of the demolding head.

30. The planar self-piercing riveting structure according to claim 29, characterized in that: At least one positioning recess is provided on the upper surface of the mounting part, and the lower end of the light-load spring is disposed in the positioning recess.

31. The planar self-piercing riveting structure according to claim 29, characterized in that: When viewed from below, the projection of the gun nose is located in the middle of the projection of the mounting part, and a plurality of the first mounting holes are distributed around the projection of the gun nose.

32. The planar self-piercing riveting structure according to claim 29, characterized in that: An insertion protrusion is provided at the middle position of the lower end face of the demolding head, and an insertion recess is formed between the upper end face of the gun nose and the inner wall of the mounting part. When the lower end of the demolding head is installed together with the upper end of the gun nose, the insertion protrusion is inserted into the insertion recess.

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