An automatic rivet gun body

Abstract

The present application relates to a kind of automatic rivet gun bodies, comprising: the first upper rivet through hole and the second upper rivet through hole are opened in upper rivet base;Upper rivet assembly is arranged on the one end of the upper rivet base in the axial direction of the second upper rivet through hole, and rivet in the second upper rivet through hole is transported to the other end and is movably clamped;Gun head assembly is arranged on the other end of the upper rivet base in the axial direction of the second upper rivet through hole, and is used for receiving the rivet transported by the upper rivet assembly and clamping;Boosting cylinder is arranged on the upper rivet assembly, and the rivet after clamping of the upper rivet assembly is pulled off;The present application is high in upper rivet efficiency, reliable, stable and labor-saving.

Description

Technical Field

[0001] This invention relates to the field of rivet gun technology, and more specifically, to an automatic rivet gun body. Background Technology

[0002] Rivet guns are used for fastening and riveting various metal sheets and pipes in the manufacturing industry. They are currently widely used in the riveting of electromechanical and light industrial products such as automobiles, aviation, railways, refrigeration, elevators, switches, instruments, furniture, and decoration. Rivet guns were developed to address the shortcomings of welding thin metal sheets and pipes, such as the easy melting of nuts and stripping of internal threads. They eliminate the need for tapping internal threads and welding nuts during riveting, providing strong, efficient, and convenient connections.

[0003] There are two main types of existing rivet guns. One type involves manually inserting the rivet into the gun head, clamping it, and then pulling it off (e.g., patent number CN207563672U, Rivet Gun). The other type uses a sliding mounting component to insert the rivet into the gun head, clamp it, and then pull it off. Manual rivet insertion is inefficient. Using a mounting component overcomes this inefficiency, but because the mounting component slides back and forth, it is prone to impacting the sheet metal to be riveted during insertion (unsuitable for use with robotic arms). Furthermore, the moment of switching between sliding back and forth generates significant inertial vibration, making it easy to lose grip and causing hand fatigue after a short period of use. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an automatic rivet gun body, which has high rivet loading efficiency, reliable use, and is stable and labor-saving.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0006] An automatic rivet gun body includes: an upper rivet base having a first upper rivet through hole and a second upper rivet through hole; an upper rivet assembly provided on one end of the upper rivet base located axially in the second upper rivet through hole for conveying and movably clamping rivets located in the second upper rivet through hole to the other end; a gun head assembly provided on the other end of the upper rivet base 1 located axially in the second upper rivet through hole for receiving and clamping rivets conveyed by the upper rivet assembly 2; and a booster cylinder provided on the upper rivet assembly for breaking off rivets clamped by the upper rivet assembly.

[0007] Optionally, the upper nail assembly includes: a cylinder; a guide nozzle provided on the extension rod of the cylinder; a third upper nail through hole opened on the extension rod of the cylinder; a fourth upper nail through hole opened on the piston of the cylinder; a sub-piston rod slidably disposed within the third and fourth upper nail through holes; one end of the sub-piston rod is located within the fourth upper nail through hole, and the other end is located within the third upper nail through hole; a claw sleeve pull rod detachably disposed on the sub-piston rod; a fifth upper nail through hole and a sixth upper nail through hole with a diameter larger than the fifth upper nail through hole opened on the claw sleeve pull rod; a gun head claw sleeve detachably disposed on the claw sleeve pull rod; a locking claw cavity opened on the gun head claw sleeve; and a locking claw cavity in the locking claw cavity. A chuck is movably disposed within the claw cavity; a top cylinder and a top cylinder spring with a through hole are slidably disposed within the sixth upper rivet through hole; one end of the top cylinder spring abuts against the inner wall of the sixth upper rivet through hole, and the other end abuts against one end of the top cylinder; the other end of the top cylinder abuts against the chuck; a seventh upper rivet through hole is provided on the sub-piston rod; a pull-off rod is slidably engaged within the seventh upper rivet through hole; a first tail rivet through hole is provided within the pull-off rod to draw away the tail of the pulled-off rivet; a tail rivet tube is provided on the top cylinder to draw away the tail of the pulled-off rivet; one end of the tail rivet tube communicates with the first tail rivet through hole, and the other end communicates with the chuck cavity; the pull-off rod is detachably connected to the booster cylinder.

[0008] Optionally, at least one check valve is provided on the piston of the cylinder, and the at least one check valve and the sub-piston rod sequentially divide the air chamber of the cylinder into a first air chamber, a second air chamber, and a third air chamber; when at least one check valve is opened, the first air chamber and the second air chamber are connected.

[0009] Optionally, a first inclined surface is provided at one end of the guide mouth to facilitate the opening of the jaws, and a guide arc surface is provided at the other end to facilitate the rivet entering the center of the jaws; a second inclined surface adapted to the first inclined surface is provided on the jaws.

[0010] Optionally, the jaw is conical, and a third inclined surface adapted to the conical shape is provided on the inner wall of the jaw cavity.

[0011] Optionally, a second tail nail through hole is provided on the extension rod of the booster cylinder to discharge the tail nail out of the gun body; the second tail nail through hole communicates with the first tail nail through hole; an air pipe connector is provided on the cylinder body of the booster cylinder; the air pipe connector is sleeved on the extension rod of the booster cylinder; the cylinder body of the booster cylinder is fixedly connected to the cylinder body of the air cylinder; the extension rod of the booster cylinder is detachably connected to the pull rod.

[0012] Optionally, a handle is provided at the bottom of the cylinder body; a switch is provided on the handle.

[0013] Optionally, the booster cylinder is a hydraulic cylinder or an electric cylinder.

[0014] Optionally, the rivet head assembly includes: a rivet gun head, a collet spring, a collet nut, and a rivet feed chuck; one end of the rivet gun head is fixedly connected to the upper rivet base; the collet spring is sleeved and abuts against the other end of the rivet gun head; the rivet feed chuck is sleeved and abuts against the collet spring; one end of the collet nut is detachably connected to the rivet gun head, and the other end is engaged with the rivet feed chuck.

[0015] Optionally, a sensor for detecting whether a rivet is present in the first upper nail through hole is provided on the outer wall of the upper nail base.

[0016] In summary, the present invention has the following advantages: 1) High nailing efficiency, reliable use, stable and labor-saving; 2) The nailing structure and locking structure are combined into one, making the automatic riveting gun body more compact and beautiful; 3) The nailing and locking process is smooth, ensuring reliability; 4) The broken tail nails will not scatter around, making them easy to collect and manage; 5) The clamping force of the nail feeding chuck is adjustable, which can be used for different specifications of rivets. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the upper nail base in this invention;

[0019] Figure 3 This is an exploded view of the upper nail assembly in this invention;

[0020] Figure 4 This is a partial sectional view I of the present invention;

[0021] Figure 5 This is a partial sectional view II of the present invention;

[0022] Figure 6 This is a partial sectional view III of the present invention;

[0023] Figure 7 This is a cross-sectional view of the claw sleeve pull rod and the gun head claw sleeve in this invention;

[0024] Figure 8 This is a cross-sectional view of the gun head assembly in this invention;

[0025] Figure 9 This is a cross-sectional view of the present invention;

[0026] Figure 10 yes Figure 9 Enlarged view of region A in the middle;

[0027] Figure 11 yes Figure 9 Enlarged view of region B in the middle;

[0028] Figure 12 yes Figure 9 Enlarged view of region C in the middle;

[0029] Figure 13 This is the action breakdown diagram I of the present invention;

[0030] Figure 14 This is the exploded view of the invention, II;

[0031] Figure 15 This is the exploded view of the operation of the present invention, III;

[0032] Figure 16 This is the action breakdown diagram IV of the present invention;

[0033] Figure 17 This is the action breakdown diagram V of the present invention;

[0034] Figure 18 This is the action breakdown diagram VI of the present invention.

[0035] In the diagram: 1. Upper nail base; 11. First upper nail through hole; 12. Second upper nail through hole; 13. Sensor; 2. Upper nail assembly; 21. Cylinder; 211. Cylinder extension rod; 2111. Third upper nail through hole; 212. Cylinder piston; 2121. Fourth upper nail through hole; 2122. One-way valve; 213. Cylinder body; 2131. Handle; 21311. Switch; 214. Cylinder container cavity; 2141. First air chamber; 2142. Second air chamber; 2143. Third air chamber; 22. Guide nozzle; 221. First inclined surface; 222. Guide arc surface; 23. Sub-piston rod; 231. Seventh upper nail through hole; 24. Claw sleeve pull rod; 241. Fifth upper nail through hole; 242. Sixth upper nail through hole; 25. Gun head claw sleeve; 251. Claw cavity; 2511. Third inclined surface; 26. Claw; 261. Second inclined surface; 27. Top cylinder; 271. Tail nail tube; 28. Top cylinder spring; 29. ​​Pull-off rod; 291. First tail nail through hole; 3. Gun head assembly; 31. Rivet gun head; 32. Clamp spring; 33. Clamp nut; 34. Nail feed chuck; 4. Pressure cylinder; 41. Extension rod of pressure cylinder; 411. Second tail nail through hole; 42. Cylinder body of pressure cylinder; 421. Air pipe connector. Detailed Implementation

[0036] To make the objectives, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and 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. 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 indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0038] In this invention, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. The terms "vertical," "horizontal," "left," "right," "above," "below," and similar expressions are for illustrative purposes only and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0039] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] This invention provides an automatic riveting gun body, such as... Figure 1-2 As shown, it includes: an upper nail base 1 with a first upper nail through hole 11 and a second upper nail through hole 12; an upper nail assembly 2 provided on one end of the upper nail base 1 located axially in the second upper nail through hole 12 to transport and movably clamp the rivet located in the second upper nail through hole 12 to the other end; a gun head assembly 3 provided on the other end of the upper nail base 1 located axially in the second upper nail through hole 12 for receiving and clamping the rivet transported by the upper nail assembly 2; and a booster cylinder 4 provided on the upper nail assembly 2 to break the rivet after it is clamped by the upper nail assembly 2.

[0041] The automatic riveting gun of this invention consists of four parts from left to right: the gun head assembly 3 is fixed to the upper nail base 1 at the left end by threads; the left end of the upper nail assembly 2 is fixed to the nail base 1 at the right end by screws; and the left end of the booster cylinder 4 is fixed to the upper nail assembly 2 at the right end by screws. The automatic riveting gun of this invention requires the use of a control box (not shown in the attached drawings). Inside the control box are installed components such as a PLC controller, a human-machine interface, a nail feeding device, an air compressor, a vacuum pump, a hydraulic pump, and solenoid valves. The air compressor on the control box is connected to the air pipe connector of the upper nail assembly 2 via a conduit; the nail feeding device on the control box is connected to the first upper nail through hole 11 of the upper nail base 1 via a conduit; the vacuum pump and hydraulic pump on the control box are both connected to the booster cylinder 4 via conduits; and the PLC controller on the control box is electrically connected to the upper nail assembly 2 via wires.

[0042] The rivet feeding device delivers the rivet to the first upper rivet through hole 11 through the guide tube. The rivet then falls into the second upper rivet through hole 12. The upper rivet assembly 2 then pushes the rivet to the gun head assembly 3. The gun head assembly 3 clamps the rivet and is in standby mode. When the PLC controller receives the pull-off command, it controls the booster cylinder 4 to act, pulling off the rivet, thereby fixing the rivet to the metal plate.

[0043] This invention overcomes the shortcomings of existing riveting components that feed rivets from outside the riveting assembly 3 for clamping by ejecting them from inside the assembly 3, thus making the automatic riveting gun more compact. When used with a robotic arm, it reduces the distance between the riveting assembly 3 and the metal sheet, overcoming the drawback of the robotic arm needing to move backward from a reference position, wait for the riveting assembly 3 to clamp the rivet, and then return to the reference position. This invention offers advantages such as high riveting efficiency, reliable operation, and stable, labor-saving operation.

[0044] Further, the upper nail assembly 2 includes: a cylinder 21; a guide nozzle 22 is provided on the extension rod 211 of the cylinder; a third upper nail through hole 2111 is formed on the extension rod 211 of the cylinder; a fourth upper nail through hole 2121 is formed on the piston 212 of the cylinder; a sub-piston rod 23 is slidably arranged in the third upper nail through hole 2111 and the fourth upper nail through hole 2121; one end of the sub-piston rod 23 is located in the fourth upper nail through hole 2121, and the other end is located in the third upper nail through hole 2111; a claw sleeve pull rod 24 is detachably provided on the sub-piston rod 23; a fifth upper nail through hole 241 and a sixth upper nail through hole 242 with a diameter larger than the fifth upper nail through hole 241 are formed on the claw sleeve pull rod 24; a gun head claw sleeve 25 is detachably provided on the claw sleeve pull rod 24; a claw cavity 251 is formed on the gun head claw sleeve 25. A claw 26 is movably disposed within the claw cavity 251; a top cylinder 27 with a through hole and a top cylinder spring 28 are slidably disposed within the sixth upper nail through hole 242; one end of the top cylinder spring 28 abuts against the inner wall of the sixth upper nail through hole 242, and the other end abuts against one end of the top cylinder 27; the other end of the top cylinder 27 abuts against the claw 26; a seventh upper nail through hole 231 is provided on the sub-piston rod 23; a pull-off rod 29 is slidably engaged within the seventh upper nail through hole 231; a first tail nail through hole 291 is provided within the pull-off rod 29 to draw away the tail of the pulled-off rivet; a tail nail tube 271 is provided on the top cylinder 27 to draw away the tail of the pulled-off rivet; one end of the tail nail tube 271 communicates with the first tail nail through hole 291, and the other end communicates with the claw cavity 251; the pull-off rod 29 is detachably connected to the booster cylinder 4.

[0045] like Figure 3-12 As shown, the main body of the upper nail assembly 2 is a cylinder 21, and the cylinder's extension rod 211 is fixed together with the cylinder's piston 212. A guide nozzle 22 is threadedly connected to the left end of the cylinder's extension rod 211; the guide nozzle 22 and the cylinder's extension rod 211 slide left and right within the second upper nail through hole 12. A third upper nail through hole 2111 is provided on the cylinder's extension rod 211, and a fourth upper nail through hole 2121 is provided on the cylinder's piston 212. The third upper nail through hole 2111 and the fourth upper nail through hole 2121 communicate with each other (e.g., ...). Figure 5(As shown). The left end of the sub-piston rod 23 slides left and right within the third upper nail through hole 2111, and the right end slides left and right within the fourth upper nail through hole 2121; the claw sleeve pull rod 24 is fixed to the left end of the sub-piston rod 23 by threads, and the gun head claw sleeve 25 is fixed to the left end of the claw sleeve pull rod 24 by threads; the claw cavity 251, the sixth upper nail through hole 242, the fifth upper nail through hole 241, and the seventh upper nail through hole 231 are connected sequentially from left to right; the gun head claw sleeve 25, the claw sleeve pull rod 24, and the left end of the sub-piston rod 23 are all located within the third upper nail through hole 2111; the top cylinder 27 is located at the left end of the sixth upper nail through hole 242, and the top cylinder spring 28 is located at the right end of the sixth upper nail through hole 242 (as shown). Figure 10 (As shown); Under the action of the top cylinder spring 28, the right end of the top cylinder spring 28 abuts against the inner wall end face of the sixth upper nail through hole 242, and the left end abuts against the top cylinder 27, which in turn abuts against the claw 26, and the claw 26 abuts against the inner wall of the claw cavity 251; A pull-off rod 29 is slidably engaged at the right end in the seventh upper nail through hole 231, and the pull-off rod 29 can slide left and right in the seventh upper nail through hole 231. When it slides to the rightmost point, it is engaged by the sub-piston rod 23, which can then drive the sub-piston rod 23 to slide to the right; The right end of the pull-off rod 29 is threadedly connected to the booster cylinder 4; The left end of the tail nail tube 271 is fixed to the top cylinder 7 by threads, and the right end can slide in the first tail nail through hole 291. The tail nail tube 271 connects the claw cavity 251 with the first tail nail through hole 291.

[0046] The upper component 2 in this invention achieves the functions of rivet installation and locking by setting a mother-daughter piston structure, that is, the cylinder extension rod 211 (mother piston) pushes out the rivet and the daughter piston rod 23 (daughter piston) locks the rivet. It combines the rivet installation structure and the locking structure into one, making the automatic rivet gun body more compact and beautiful. It overcomes the shortcomings of the existing rivet installation parts which are installed on the gun body in an external manner, which is not only unsightly but also affects the use with the robot arm.

[0047] Furthermore, at least one-way valve 2122 is provided on the piston 212 of the cylinder. The at least one-way valve 2122 and the sub-piston rod 23 sequentially divide the air chamber 214 of the cylinder into a first air chamber 2141, a second air chamber 2142, and a third air chamber 2143. When at least one one-way valve 2122 is opened, the first air chamber 2141 is connected to the second air chamber 2142.

[0048] like Figure 4 , 11 As shown, two one-way valves 2122 are provided on the left end face of the piston 212 of the cylinder; when the one-way valve 2122 is open, gas flows from the first gas chamber 2141 into the second gas chamber 2142; when the one-way valve 2122 is closed, gas cannot flow from the second gas chamber 2142 into the first gas chamber 2141.

[0049] In this invention, the one-way valve 2122 causes the sub-piston rod 23 to slide to the right following the cylinder's extension rod 211. On the other hand, when the cylinder's extension rod 211 slides to the left, the sub-piston rod 23 does not immediately slide relative to the cylinder's extension rod 211 to the left, thus ensuring that the chuck 26 is in the closed state. This allows the rivet to be pushed out and clamped by the gun head assembly 3 when the rivet is being tightened. Only when the one-way valve 2122 presses against the inner wall of the cylinder 21's front end cover does the one-way valve 2122 open, causing the sub-piston rod 23 to slide relative to the cylinder's extension rod 211 to the left, thereby pressing against the guide nozzle 22 and opening the chuck 26. Figure 16 As shown.

[0050] Furthermore, a first inclined surface 221 is provided at one end of the guide nozzle 22 to facilitate the opening of the claw 26, and a guide arc surface 222 is provided at the other end to facilitate the rivet entering the center of the claw 26; a second inclined surface 261 adapted to the first inclined surface 221 is provided on the claw 26.

[0051] Furthermore, the claw 26 is conical, and a third inclined surface 2511 adapted to the conical shape is provided on the inner wall of the claw cavity 251.

[0052] like Figure 5 , 10 As shown, the guide nozzle 22 has a first inclined surface 221 on the right side and a flared guide arc surface 222 on the left side; the chuck 26 has a second inclined surface 261 on the left side; when the chuck 26 just touches the guide nozzle 22, the chuck is in a locked (closed) state; when the chuck sleeve pull rod 24 continues to move to the left, the chuck 26 opens with the cooperation of the first inclined surface 221 and the second inclined surface 261, at which time the tail end of the rivet enters the engagement hole of the chuck 26; when the chuck sleeve pull rod 24 moves to the right in the opposite direction, the gun head chuck sleeve 25 drives the chuck 26 to move to the right. Because the chuck 26 is conical and has a third inclined surface 2511, the chuck 26 will lock the tail end of the rivet when it moves to the right, and the tail end of the rivet will be pulled off when it moves to a certain position.

[0053] In this invention, the first inclined surface 221 and the second inclined surface 261 cooperate to reduce the resistance encountered when the claw 26 opens, making the opening process of the claw 26 smoother; the third inclined surface 2511 cooperates with the conical surface of the claw 26 to reduce the resistance encountered when the claw 26 closes, making the closing process of the claw 26 smoother.

[0054] Furthermore, a second tail nail through hole 411 for discharging the tail nail from the gun body is provided on the extension rod 41 of the booster cylinder; the second tail nail through hole 411 communicates with the first tail nail through hole 291; an air pipe connector 421 is provided on the cylinder body 42 of the booster cylinder; the air pipe connector 421 is sleeved on the extension rod 41 of the booster cylinder; the cylinder body 42 of the booster cylinder is fixedly connected to the cylinder body 213 of the air cylinder; the extension rod 41 of the booster cylinder is detachably connected to the pull rod 29.

[0055] like Figure 12 As shown, the extension rod 41 of the booster cylinder has a second tail pin through hole 411. The extension rod 41 of the booster cylinder is threadedly connected to the pull rod 29. The second tail pin through hole 411 communicates with the first tail pin through hole 291. The right end of the extension rod 41 of the booster cylinder can slide in the inner hole of the air pipe connector 421.

[0056] In this invention, the extension rod 41 of the booster cylinder applies a pulling force to break the rivet, and at the same time sucks the broken rivet tail to the tail nail collection point, which facilitates the collection of the tail nail and prevents the tail nail from scattering around the environment in a manner similar to a bullet casing.

[0057] Furthermore, a handle 2131 is provided at the bottom of the cylinder body 213 of the cylinder; a switch 21311 is provided on the handle 2131.

[0058] Furthermore, the booster cylinder 4 is a hydraulic cylinder or an electric cylinder.

[0059] Because breaking a rivet requires a large pulling force, miniature hydraulic cylinders or electric cylinders are suitable as long as they do not occupy a large volume.

[0060] Furthermore, the rivet head assembly 3 includes: a rivet gun head 31, a collet spring 32, a collet nut 33, and a rivet feed chuck 34; one end of the rivet gun head 31 is fixedly connected to the upper rivet base 1; the collet spring 32 is sleeved and abuts against the other end of the rivet gun head 31; the rivet feed chuck 34 is sleeved and abuts against the collet spring 32; one end of the collet nut 33 is detachably connected to the rivet gun head 31, and the other end is engaged with the rivet feed chuck 34.

[0061] like Figure 8As shown, the right end of the rivet gun head 31 is threaded onto the upper rivet base 1, and the collet nut 33 is threaded onto the rivet gun head 31. The feed chuck 34 is movably locked onto the rivet gun head 31 by the collet nut 33. Under the pressure of the collet spring 32, the feed chuck 34 is normally closed. When the rivet is pushed to the left by the guide nozzle 22, the rivet presses against the inner wall of the feed chuck 34, and the feed chuck 34 is pushed open. When the rivet head is pushed out of the inner cavity of the feed chuck 34, the collet spring 32 presses against the feed chuck 34, the feed chuck 34 closes and then bites the rivet, fixing the rivet onto the rivet gun. To increase the clamping effect, an elastic rubber ring or spring can be fitted onto the outer cylindrical surface of the feed chuck 34.

[0062] In this invention, the gun head assembly 3 adjusts the thread depth between the collet nut 33 and the rivet gun head 31, thereby adjusting the pressure applied by the collet spring 32 to the rivet feed chuck 34, thus adjusting the clamping force of the rivet feed chuck 34 to clamp the rivet, making it easier for the rivet to push open the rivet feed chuck 34 during rivet installation, and ensuring that the rivet is not easy to fall off during rapid movement of the rivet gun.

[0063] Furthermore, a sensor 13 is provided on the outer wall of the upper nail base 1 for detecting whether there is a rivet in the first upper nail through hole 11.

[0064] like Figure 2 , 4 As shown, sensor 13 is a proximity switch or fiber optic sensor, electrically connected to the PLC controller. Its function is to prevent the cylinder extension rod 211 from sliding to the left and causing a "gun jamming" phenomenon when the rivet has not fully fallen into the second upper rivet through hole 12.

[0065] The following is a breakdown of the actions of this invention:

[0066] (1) Power on the machine by pressing the power button on the control box. The rivet gun is in its initial state; the one-way valve 2122 is opened, the gas in the second gas chamber 2142 is exhausted, the piston rod 23 moves forward, and the pawl 26 is opened by the first inclined surface 221 on the right side of the guide nozzle 22, thus presenting an open state. Figure 13 As shown.

[0067] (2) Pressing the first switch 21311, the booster 4 supplies hydraulic oil, and the extension rod 41 of the booster cylinder retracts, sequentially driving the pull rod 29, the piston rod 23, the claw sleeve pull rod 24, the gun head claw sleeve 25, and the chuck 26 to move backward. The extension rod 211 of the cylinder remains stationary. At this time, the chuck 26 changes from the open state to the closed state (during the rivet gripping process), as follows: Figure 14 As shown.

[0068] (3) When the hydraulic oil supply is completed, the extension rod 41 of the booster cylinder retracts to the right end of the booster cylinder 4, and the booster 4 immediately resets (by pre-setting a delay on the PLC controller, or by adding a proximity switch A to the right end of the booster 4). The third air chamber 2143 is filled with gas, the piston rod 23 moves forward, returns to the initial state, opens the three-jaw chuck, and allows the broken rivet core to be sucked away from the middle (in sequence through the tail pin tube 271, the first tail pin through hole 291, the second tail pin through hole 411, and the air pipe connector 421). Figure 15 As shown.

[0069] (4) In step (3), when the booster 4 is reset to the initial position, the PLC controller receives a signal (by pre-setting a delay on the PLC controller, or by adding a proximity switch B to the left end of the booster 4); the PLC controller then sends a signal to the solenoid valve, the solenoid valve switches the air inlet and outlet direction of the cylinder 21, the piston 212 of the cylinder moves backward, at this time the first air chamber 2141 is filled with gas, opening the one-way valve 212, the gas enters the second air chamber 2142, and the third air chamber 2143 is gradually compressed; the piston 212 of the cylinder continues to move backward, as Figure 16 As shown.

[0070] (5) When the piston 212 of the cylinder is pushed to the bottom, the one-way valve 212 continues to open, and gas enters the second gas chamber 2142. The piston rod 23 continues to move backward until it reaches its stroke, allowing the second gas chamber 2142 to be partially filled with gas, such as... Figure 16 As shown.

[0071] (6) When the sub-piston rod 23 reaches the stroke, the PLC controller controls the nail feeding device to feed the nail (by setting a delay on the PLC controller in advance, or by setting a proximity switch C on the right end of the cylinder 21).

[0072] (7) Sensor 13 (i.e. proximity switch C or fiber optic sensor) detects the signal of the rivet delivery (add delay to prevent interference between the rivet delivery and the guide nozzle 22 push rivet movement). At this time, the rivet delivery device continues to supply air (add delay) until the rivet completely falls into the second upper rivet through hole 12.

[0073] (8) After sensor 13 detects that the rivet has completely fallen into the second upper rivet through hole 12, the PLC controller sends a signal to the solenoid valve. The solenoid valve switches the air inlet and outlet direction of cylinder 21, and the piston 212 of the cylinder moves forward. At this time, the one-way valve 212 is in the closed state, and the second air chamber 2142 is always kept full of air pressure, thereby ensuring that the sub-piston rod 23 does not move forward to push open the chuck 26, so that the chuck 26 is in the closed state. Figure 17 As shown.

[0074] (9) When the piston 212 of the cylinder extends forward to its foremost position, the ejector pin of the one-way valve 212 will hit the front cover. At this time, when the one-way valve 212 is opened, the gas in the second gas chamber 2142 is discharged from the open part of the one-way valve 212, and the piston rod 23 moves forward, pushing the rivet out of the rivet feed chuck 34 and clamping it by the rivet feed chuck 34. Figure 18 As shown.

[0075] (10) When the piston rod 23 reaches the left end of the stroke, the pawl 26 is pushed open by the guide mouth 22, the rivet enters through the guide and is sucked into the pawl 26, and then the cycle from (1) to (10) is repeated.

[0076] In summary, the present invention has the following advantages: 1) High nailing efficiency, reliable use, stable and labor-saving; 2) The nailing structure and locking structure are combined into one, making the automatic riveting gun body more compact and beautiful; 3) The nailing and locking process is smooth, ensuring reliability; 4) The broken tail nails will not scatter around, making them easy to collect and manage; 5) The clamping force of the nail feeding chuck is adjustable, which can be used for different specifications of rivets.

[0077] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An automatic rivet gun body, characterized in that, include: An upper nail base having a first upper nail through hole and a second upper nail through hole; an upper nail assembly is provided on one end of the upper nail base located axially in the second upper nail through hole, which transports the rivet located in the second upper nail through hole to the other end and movably clamps it; a gun head assembly is provided on the other end of the upper nail base located axially in the second upper nail through hole for receiving and clamping the rivet transported by the upper nail assembly. A pressure cylinder is provided on the upper nail assembly to break the rivet after the upper nail assembly is clamped; The upper nail assembly includes: a cylinder; a guide nozzle is provided on the extension rod of the cylinder; a third upper nail through hole is formed on the extension rod of the cylinder; a fourth upper nail through hole is formed on the piston of the cylinder; a sub-piston rod is slidably disposed within the third and fourth upper nail through holes; one end of the sub-piston rod is located within the fourth upper nail through hole, and the other end is located within the third upper nail through hole; a claw sleeve pull rod is detachably disposed on the sub-piston rod; a fifth upper nail through hole and a sixth upper nail through hole with a diameter larger than the fifth upper nail through hole are formed on the claw sleeve pull rod; a gun head claw sleeve is detachably disposed on the claw sleeve pull rod; a claw cavity is formed on the gun head claw sleeve; and a claw cavity is formed within the claw cavity. The device includes a movable chuck; a top cylinder with a through hole and a top cylinder spring are slidably disposed within the sixth upper rivet through hole; one end of the top cylinder spring abuts against the inner wall of the sixth upper rivet through hole, and the other end abuts against one end of the top cylinder; the other end of the top cylinder abuts against the chuck; a seventh upper rivet through hole is provided on the sub-piston rod; a pull-off rod is slidably engaged within the seventh upper rivet through hole; a first tail rivet through hole is provided within the pull-off rod to draw away the tail of the pulled-off rivet; a tail rivet tube is provided on the top cylinder to draw away the tail of the pulled-off rivet; one end of the tail rivet tube communicates with the first tail rivet through hole, and the other end communicates with the chuck cavity; the pull-off rod is detachably connected to the booster cylinder. At least one check valve is provided on the piston of the cylinder, and the at least one check valve and the sub-piston rod sequentially divide the air chamber of the cylinder into a first air chamber, a second air chamber, and a third air chamber; when at least one check valve is opened, the first air chamber and the second air chamber are connected. A second tail nail through hole is provided on the extension rod of the booster cylinder to discharge the tail nail out of the gun body; the second tail nail through hole communicates with the first tail nail through hole; an air pipe connector is provided on the cylinder body of the booster cylinder; the air pipe connector is sleeved on the extension rod of the booster cylinder; the cylinder body of the booster cylinder is fixedly connected to the cylinder body of the air cylinder; the extension rod of the booster cylinder is detachably connected to the pull rod; The rivet head assembly includes: a rivet gun head, a collet spring, a collet nut, and a rivet feed chuck; one end of the rivet gun head is fixedly connected to the upper rivet base; the collet spring is sleeved and abuts against the other end of the rivet gun head; the rivet feed chuck is sleeved and abuts against the collet spring; one end of the collet nut is detachably connected to the rivet gun head, and the other end is engaged with the rivet feed chuck.

2. The automatic riveting gun body according to claim 1, characterized in that, A first inclined surface is provided at one end of the guide nozzle to facilitate the opening of the jaws, and a guide arc surface is provided at the other end to facilitate the rivet entering the center of the jaws; a second inclined surface is provided on the jaws to match the first inclined surface.

3. The automatic riveting gun body according to claim 1, characterized in that, The jaw is conical, and a third inclined surface adapted to the conical shape is provided on the inner wall of the jaw cavity.

4. The automatic riveting gun body according to claim 1, characterized in that, A handle is provided at the bottom of the cylinder body; a switch is provided on the handle.

5. The automatic riveting gun body according to claim 1, characterized in that, The booster cylinder is a hydraulic cylinder or an electric cylinder.

6. The automatic riveting gun body according to claim 1, characterized in that, A sensor is provided on the outer wall of the upper nail base to detect whether there is a rivet in the first upper nail through hole.

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