An air guiding structure and method for a pneumatic rivet gun

Abstract

This application discloses a gas guiding structure and method for a pneumatic rivet gun, relating to the technical field of rivet guns. The gas guiding structure of a pneumatic rivet gun includes a gun body and a handle. The gun body has an internal cavity extending to the left end of the gun body, forming an opening. A core-pulling component is provided within the cavity, and a recovery channel is provided within the core-pulling component. The left end of the recovery channel extends to communicate with the opening. A collection cylinder is provided on the gun body, and a negative pressure generating structure is also provided within the recovery channel. The handle is connected to the gun body, and an airflow channel is provided within the handle. One end of the airflow channel extends to the outer surface of the handle to form an air inlet, and the other end extends into the gun body and communicates with the recovery channel. A gas flow interval structure is also provided within the handle, and a button is also provided on the handle. This application also discloses a gas guiding method applied to the gas guiding structure of a pneumatic rivet gun. This application enables the core-pulling action of the rivet gun to be synchronized with the opening and closing of the recovery air source, thereby saving compressed gas consumption.

Description

Technical Field

[0001] This application relates to the technical field of rivet guns, and in particular to an air guiding structure and air guiding method for a pneumatic rivet gun. Background Technology

[0002] A pneumatic rivet gun, also known as a pneumatic rivet gun, is a tool that uses compressed air to fasten and rivet various metal sheet parts. Pneumatic rivet guns are typically used with blind rivets; after riveting the blind rivet, the gun clamps the mandrel and sucks it in for recovery. To facilitate mandrel recovery, current pneumatic rivet guns usually have a normally open recovery passage connected to a normally open recovery air source that generates negative pressure. When the pneumatic rivet gun is in operation, this constantly open recovery air source maintains negative pressure in the recovery passage, leading to significant compressed air waste and environmental friendliness. Summary of the Invention

[0003] To save compressed air, this application provides an air guiding structure and air guiding method for a pneumatic rivet gun.

[0004] Firstly, the aforementioned objective of this invention is achieved through the following technical solution:

[0005] An air guiding structure for a pneumatic rivet gun, comprising:

[0006] The gun body has a cavity inside, and the cavity extends to the end of the gun body to form an opening for feeding in the core rod;

[0007] A core-pulling component is provided inside the cavity. The core-pulling component has a recycling channel communicating with the opening. The recycling channel has a negative pressure generating structure. The recycling channel is used to receive the core rod entering from the opening. The end of the recycling channel away from the opening extends to communicate with the outside.

[0008] A gun handle, which is connected to the gun body; the gun handle is provided with an airflow channel, one end of which extends to the outer surface of the gun handle to form an air inlet for receiving compressed gas, and the other end of which extends into the gun body and communicates with the recovery channel;

[0009] The gun handle is also provided with a gas flow interval structure, which is used to allow compressed air to enter the recovery channel at intervals. The gun handle is provided with a control element to help control the flow of compressed air.

[0010] By adopting the above technical solution, after compressed air is introduced into the air inlet, pressing the button allows the compressed gas to flow through the gas flow interval structure and intermittently into the recovery channel. At this time, the negative pressure generating structure will generate negative pressure in the recovery channel. After the core puller is riveted and the core rod is pulled out of the opening, pressing the button will pull the core rod into the recovery channel. This design enables the introduction of compressed air to be controlled by a button, thereby saving compressed air.

[0011] Preferably, the gas flow interval structure includes a first chamber and a second chamber disposed within the gun handle;

[0012] The first chamber is provided with a piston, the piston has a first sub-chamber and a second sub-chamber and the first sub-chamber and the second sub-chamber are connected, the air inlet is connected to the second sub-chamber, and the button is used to release the gas in the first sub-chamber;

[0013] The second chamber is provided with a piston plate, which divides the second chamber into a first sub-chamber and a second sub-chamber in sequence. The piston plate moves upward to allow the core-pulling component to clamp the core rod, and moves downward to allow the core-pulling component to rivet and pull out the core rod to the opening. The gun handle has a first ventilation channel that connects the first chamber and the second sub-chamber. The first ventilation channel is used to introduce compressed air from the second sub-chamber into the second sub-chamber, thereby causing the piston plate to move upward. The airflow channel is connected to the first chamber.

[0014] By adopting the above technical solution, when compressed air is introduced into the air inlet, the compressed air will flow into the first sub-cavity and the second sub-cavity, and the piston will abut against the right end face of the first chamber. At this time, pressing the button will cause the compressed air in the first sub-cavity to be released, thereby causing the piston to move to the left and abut against the left end face of the first chamber. Then, the compressed air will reach the second sub-cavity through the first ventilation channel to push the piston plate upward. The upward movement of the piston plate will cause the core-pulling component to clamp the core rod. After the core rod is clamped, the button is released, and the compressed air in the second sub-cavity flows into the first sub-cavity. The piston will reset, and the piston plate will move downward under the action of gravity. The downward movement of the piston plate will cause the core-pulling component to rivet and pull out the core rod to the opening. The compressed air in the second sub-cavity will enter the first chamber through the first ventilation channel. Then, the compressed air will reach the recovery channel through the airflow channel, and the core rod will be sucked into the recovery channel from the opening.

[0015] Preferably, a sealing ring is provided between the piston plate and the second chamber.

[0016] By adopting the above technical solution, the sealing performance between the piston plate and the second chamber can be enhanced.

[0017] Preferably, an air seal is provided between the first chamber and the piston to increase sealing.

[0018] By adopting the above technical solution, it can be ensured that the compressed air located in the second auxiliary chamber will not return to the airflow channel after recirculation.

[0019] Preferably, the gas seal is made of polytetrafluoroethylene.

[0020] By adopting the above technical solution, polytetrafluoroethylene has a wide operating temperature range and can still work normally even when the piston and the first chamber generate high temperatures due to friction.

[0021] Preferably, the second chamber is provided with a guide post, the piston plate is provided with a guide hole, and the guide post is inserted into the guide hole; the first ventilation channel is provided in the guide post.

[0022] By adopting the above technical solution, this design enables the piston plate to move up and down guided by the guide column.

[0023] Preferably, the gun handle has a second ventilation channel that connects the first chamber and the first secondary chamber. The second ventilation channel is used to introduce compressed air from the second sub-chamber into the first secondary chamber, thereby facilitating the downward movement of the piston plate.

[0024] By adopting the above technical solution, this design will cause the compressed air in the first ventilation channel to be divided into two streams. The first stream enters the first secondary chamber through the second ventilation channel, and the second stream enters the airflow channel. The first stream of compressed air will cause the piston plate to move down at an accelerated speed. After the piston plate moves down to the bottom of the second chamber, the first secondary chamber will no longer receive air.

[0025] Preferably, the button is located on the side wall of the gun handle near the opening.

[0026] By adopting the above technical solution, this design makes it easier for users to press the button when they are holding the gun handle and need to perform core riveting.

[0027] Preferably, the button has a raised portion.

[0028] By adopting the above technical solution, this design makes it easier for users to press the button with their middle or index finger.

[0029] Secondly, the above-mentioned objective of this invention is achieved through the following technical solution:

[0030] A method for guiding air in the air guiding structure of a pneumatic rivet gun includes the following steps:

[0031] S1. Compressed air is introduced into the air inlet. The compressed air flows from the second sub-chamber into the first sub-chamber. At this time, the piston moves to the right and abuts against the right end face of the first chamber.

[0032] S2. Pressing the button depressurizes the first sub-chamber, causing the piston to move to the left and abut against the left end face of the first chamber. At this time, compressed air will flow into the second sub-chamber through the first ventilation channel, and then the piston plate will move upward.

[0033] S3. Releasing the button stops the first sub-chamber from depressurizing. The piston will move to the right, and the compressed gas in the second sub-chamber will flow back into the first chamber through the first ventilation channel. At this time, one stream of compressed air in the first chamber will flow into the first sub-chamber through the second ventilation channel to help the piston plate move down, while another stream will flow into the recovery channel through the airflow channel.

[0034] By adopting the above technical solution, compressed gas can flow into the recovery channel in an orderly manner under the control of the button, and under the action of the negative pressure generating structure, the recovery channel can form a negative pressure to suck up the core rod at the opening.

[0035] In summary, the present invention has at least one of the following beneficial technical effects:

[0036] 1. After compressed air is introduced into the air inlet, pressing the button allows the compressed gas to flow intermittently into the recovery channel through the gas flow interval structure. At this time, the negative pressure generating structure will create a negative pressure in the recovery channel. When the core puller clamps the core rod and pulls it to the opening, pressing the button will pull the core rod into the recovery channel. This design allows the introduction of compressed air to be controlled by a button, thereby saving compressed air.

[0037] 2. When compressed air is introduced into the air inlet, the compressed air flows into the first and second sub-cavities, and the piston abuts against the right end face of the first chamber. Pressing the button at this time will cause the compressed air in the first sub-cavity to be released, thereby causing the piston to move to the left and abut against the left end face of the first chamber. Then, the compressed air will reach the second sub-cavity through the first ventilation channel to push the piston plate upward. The upward movement of the piston plate will cause the core-pulling component to clamp the core rod. After the core rod is clamped, the button is released, and the compressed air in the second sub-cavity flows into the first sub-cavity. The piston will return to its original position. At this time, the piston plate moves downward under the action of gravity. The downward movement of the piston plate will cause the core-pulling component to rivet and pull out the core rod to the opening. The compressed air in the second sub-cavity will enter the first chamber through the first ventilation channel. Then, the compressed air will reach the recovery channel through the airflow channel, and the core rod will be sucked into the recovery channel from the opening.

[0038] 3. Compressed gas can flow into the recovery channel in an orderly manner under the control of the button, and under the action of the negative pressure generating structure, the recovery channel can form a negative pressure to suck up the core rod at the opening. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall structure of the air guiding structure of a pneumatic rivet gun according to an embodiment of this application;

[0040] Figure 2 It is a partial sectional view used to show the internal structure of the gun head and gun handle;

[0041] Figure 3 It is a cross-sectional view used to illustrate the structure of the gas flow interval;

[0042] Figure 4 yes Figure 3 Enlarged view of section A.

[0043] Marked in the attached diagram:

[0044] 1. Gun body;

[0045] 11. Core-pulling component; 12. Collection cylinder;

[0046] 100. Cavity; 101. Opening; 110. Recovery channel; 111. Air outlet;

[0047] 2. Gun handle;

[0048] 21. Gas flow interval structure; 22. Button;

[0049] 200. Airflow channel; 201. Air inlet; 211. First chamber; 2111. First sub-chamber; 2112. Second sub-chamber; 2113. Air guide hole; 212. Second chamber; 2121. First auxiliary chamber; 2122. Second auxiliary chamber; 213. Piston component; 214. Piston plate; 2141. Guide hole; 215. Guide post; 216. First ventilation channel; 217. Second ventilation channel;

[0050] 3. Sealing ring;

[0051] 4. Gas seals. Detailed Implementation

[0052] The present invention will be further described in detail below with reference to the accompanying drawings.

[0053] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are 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 device 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.

[0054] This application discloses an air guiding structure for a pneumatic rivet gun. It is used to synchronize the riveting core-pulling action with the opening and closing of the recovery air source, thereby saving compressed air consumption. The riveting described here uses a blind rivet for riveting. (Refer to...) Figure 1 and Figure 2 A pneumatic rivet gun's air guiding structure includes a gun body 1. The gun body 1 has an internal cavity 100, which extends to the left end of the gun body 1 to form an opening 101. A core-pulling component 11 is provided inside the cavity 100. The core-pulling component 11 is used to clamp the core rod in the core-pulling rivet and perform riveting. The core rod is clamped and enters from the opening 101 end, thereby achieving fastening between metal plates. The riveting of the core-pulling rivet by the core-pulling component 11 and the actions of pulling out the core rod and dragging it into the gun body 1 from the opening 101 are all prior art, so they will not be described in detail here.

[0055] Reference Figure 2 The core-pulling component 11 has a recycling channel 110 inside. The left end of the recycling channel 110 extends to communicate with the opening 101, and the right end of the recycling channel 110 extends to the wall of the gun head to form an air outlet 111 and communicate with the outside. Figure 1 The gun body 1 is also detachably equipped with a collection cylinder 12. The collection cylinder 12 has an air hole. The internal space of the collection cylinder 12 is connected to the inside of the recovery channel 110 through the air outlet 111. The core rod entering from the opening 101 end can pass through the recovery channel 110 to reach the collection cylinder 12. The recovery channel 110 is also equipped with a negative pressure generating structure. The negative pressure generating structure is existing technology and will not be described in detail here. The negative pressure generating structure helps to generate negative pressure in the recovery channel 110, thereby helping the core rod to move from left to right in the recovery channel 110 and enter the collection cylinder 12.

[0056] Reference Figure 2 The air guiding structure of a pneumatic rivet gun also includes a handle 2, which is located below and connected to the gun body 1. The handle 2 is shaped like a grip for easy handling by the user. An airflow channel 200 is provided inside the handle 2. One end of the airflow channel 200 extends to the surface of the handle 2 to form an air inlet 201. The other end of the airflow channel 200 extends from inside the handle 2 into the gun body 1 and communicates with the inside of the recovery channel 110. The communication position is located at the left end of the recovery channel 110.

[0057] Reference Figure 2 and Figure 3 The gun handle 2 is also equipped with a gas flow interval structure 21. Figure 3 This is a schematic diagram illustrating the gas flow interval structure 21. A button 22 is provided on the side wall of the gun handle 2. The gas flow interval structure 21 is used to allow compressed air to enter the recovery channel 110 intermittently, while the button 22 helps to control the on and off of the compressed air. This design aims to use the button 22 to simultaneously control the riveting core pulling and the opening and closing of the recovery air source.

[0058] First, compressed air needs to be connected to the air inlet 201. Then, press the button 22 to allow the compressed gas to flow through the gas flow interval structure 21 and into the recovery channel 110 at intervals. At this time, the negative pressure generating structure will generate negative pressure in the recovery channel 110. Pressing and releasing the button 22 will cause the core puller 11 to rivet the core puller and pull out the core rod from the opening 101. The core rod will enter the recovery channel 110 under the action of negative pressure. Finally, the core rod will enter the collection cylinder 12 and be collected.

[0059] Reference Figure 3 The gas flow interval structure 21 includes a first chamber 211 and a second chamber 212 disposed within the gun handle 2, with the first chamber 211 located above the second chamber 212. Figure 4 The first chamber 211 is in the shape of a stepped column. A piston 213 that can move left and right in the first chamber 211 is provided inside the first chamber 211. The piston 213 has a first sub-chamber 2111 and a second sub-chamber 2112 distributed from left to right. The left end of the first sub-chamber 2111 and the right end of the second sub-chamber 2112 are both open. The first sub-chamber 2111 and the second sub-chamber 2112 are connected by an air guide hole 2113 located between the first sub-chamber 2111 and the second sub-chamber 2112. The second sub-chamber 2112 is connected to the air inlet 201. The button 22 is also used to release the compressed air in the first sub-chamber 2111. The air release structure here is existing technology and will not be described in detail.

[0060] Reference Figure 3 The second chamber 212 is equipped with a horizontally arranged piston plate 214. The piston plate 214 can move along the side wall of the second chamber 212 and can move downward to the bottom of the second chamber 212 under the action of gravity. The piston plate 214 divides the second chamber 212 into a first sub-chamber 2121 and a second sub-chamber 2122 from top to bottom. Passing compressed air into the first sub-chamber 2121 helps the piston plate 214 move downward, and passing compressed air into the second sub-chamber 2122 helps the piston plate 214 move upward. Figure 2 It should be noted that: moving the piston plate 214 upward can cause the core-pulling component 11 to move to the left and clamp the core rod, and moving the piston plate 214 downward can cause the core-pulling component 11 to clamp the core rod, pull it to the right, and then release it.

[0061] Reference Figure 3 The second chamber 212 has a vertically arranged guide post 215, and the piston plate 214 has a guide hole 2141. The guide post 215 is inserted into the guide hole 2141, and the piston plate 214 can move up and down along the axis of the guide post 215. The guide post 215 is used to guide the movement of the piston plate 214. The gas flow interval structure 21 also includes a first ventilation channel 216 and a second ventilation channel 217. The first ventilation channel 216 is located in the guide post 215 and is used to connect the first chamber 211 and the second auxiliary chamber 2122. Here, the first chamber 211 and the second auxiliary chamber 2122 can only be connected through the first ventilation channel 216 when the piston 213 moves to abut against the left end face of the first chamber 211. Figure 2 At this time, the first ventilation channel 216 is not connected to the air inlet 201; the second ventilation channel 217 is located between the first chamber 211 and the first auxiliary chamber 2121 and is used to connect the first chamber 211 and the first auxiliary chamber 2121. Here, the first chamber 211 and the first auxiliary chamber 2121 can only be connected through the second ventilation channel 217 when the piston 213 moves to abut against the right end face of the first chamber 211.

[0062] Before riveting, normally open compressed air needs to be introduced into the air inlet 201. The compressed air will flow into the second sub-chamber 2112. Since the pressure of the first sub-chamber 2111 is lower than that of the second sub-chamber 2112 at this time, the compressed air will enter the first sub-chamber 2111 first through the air guide hole 2113. Then the piston 213 will be pushed to the right until it abuts against the right end face of the first chamber 211.

[0063] Pressing button 22 at this time will cause the compressed air in the first sub-cavity 2111 to be released, thereby causing the piston 213 to move to the left and abut against the left end face of the first chamber 211. In this state, the compressed air will reach the second sub-cavity 2122 through the first ventilation channel 216, pushing the piston plate 214 upward. The upward movement of the piston plate 214 will cause the core-pulling component 11 to clamp the core rod. After the core rod is clamped, release button 22, and the compressed air in the second sub-cavity 2112 will flow into the first sub-cavity 2111. The piston 213 will return to the state of abutting against the right end face of the first chamber 211. At this time, the piston plate 214 will move downward under the action of gravity. The downward movement of the piston plate 214 will cause the core-pulling component 11 to be riveted and pull the core rod out of the core-pulling rivet to the opening 101; see reference. Figure 3 and Figure 4The thicker lines with arrows indicate the following gas flow pattern: As the piston plate 214 moves downward, the compressed air in the second auxiliary chamber 2122 flows back to the first chamber 211 through the first ventilation channel 216. At this time, the compressed air in the first chamber 211 splits into two streams. The first stream enters the first auxiliary chamber 2121 through the second ventilation channel 217, thereby accelerating the downward movement of the piston plate 214. When the piston plate 214 moves down to abut the bottom of the second chamber 212, the first auxiliary chamber 2121 stops receiving air, and the second stream enters the airflow channel 200 and reaches the recovery channel 110. It should be noted that the compressed gas flow speed is relatively fast, and all the above actions are performed sequentially.

[0064] Reference Figure 3 A sealing ring 3 is provided between the piston plate 214 and the second chamber 212 to enhance the sealing performance between them. Several gas seals 4 are provided between the first chamber 211 and the piston 213. The gas seals 4 are made of polytetrafluoroethylene and are used to prevent the compressed gas in the second auxiliary chamber 2122 from flowing back along the airflow channel 200.

[0065] The specific structure of button 22 in this embodiment is as follows:

[0066] Reference Figure 2 Button 22 is located on the left side wall of the gun handle 2. Button 22 protrudes outward and can be pressed by the user's middle or index finger. This design makes it convenient for the user to hold the gun handle 2 and lift it up for riveting while pressing button 22 with the middle or index finger.

[0067] The implementation principle of the air guiding structure of the pneumatic rivet gun in this application embodiment is as follows:

[0068] Before riveting, compressed air needs to be connected to the air inlet 201. The compressed air will flow into the first sub-cavity 2111 through the second sub-cavity 2112. At this time, the piston 213 will abut against the right end face of the first chamber 211.

[0069] When riveting, the opening 101 needs to be aligned with the pop rivet, and then the button 22 is pressed to release the compressed air in the first sub-chamber 2111. At this time, the piston 213 moves to the left and abuts against the left end face of the first chamber 211. At this time, the compressed air entering from the air inlet 201 will pass through the first ventilation channel 216 to reach the second sub-chamber 2122. The piston plate 214 moves up to make the pop rivet 11 clamp the core rod.

[0070] After releasing button 22, the compressed air in the second sub-cavity 2112 flows into the first sub-cavity 2111, causing the piston 213 to move to the left and abut against the left end face of the first chamber 211. The piston plate 214 moves downward under gravity. The downward movement of the piston plate 214 will drive the core-pulling component 11 to pull the clamped core rod inward from the opening 101 and then release it. At this time, the compressed air in the second sub-cavity 2122 will flow back into the first chamber 211 through the first ventilation channel 216 and be divided into two streams. The core rod passes through the second ventilation channel 217 and enters the first auxiliary chamber 2121, causing the piston plate 214 to move downward at an accelerated speed. When the piston plate 214 moves down to abut the bottom of the second chamber 212, the first auxiliary chamber 2121 stops taking in air, and the second core rod enters the airflow channel 200 and reaches the recovery channel 110. The compressed air entering the recovery channel 110 then forms a negative pressure under the action of the negative pressure generating structure, thereby drawing the core rod through the recovery channel 110 into the collection cylinder 12 for collection.

[0071] This application also discloses a method for guiding the air in a pneumatic rivet gun's air guiding structure, comprising the following steps:

[0072] S1. Before riveting, normally open compressed air needs to be introduced into the airflow channel 200 through the air inlet 201. The compressed air enters the second sub-chamber 2112 and flows into the first sub-chamber 2111 through the air guide hole 2113. At this time, the piston 213 will move to the right and abut against the right end face of the first chamber 211.

[0073] S2. Pressing button 22 depressurizes the first sub-chamber 2111. The reduced pressure in the first sub-chamber 2111 causes the piston 213 to move to the left and abut against the left end face of the first sub-chamber 2111. At this time, compressed air will flow into the second auxiliary chamber 2122 through the first ventilation channel 216, and the piston plate 214 will move upward.

[0074] S3. Releasing button 22 stops the depressurization of the first sub-chamber 2111. The compressed air in the second sub-chamber 2112 will flow into the first sub-chamber 2111, and the piston 213 will move to the right. The compressed gas in the second auxiliary chamber 2122 will flow back and flow into the first chamber 211 through the first ventilation channel 216. One stream of compressed air in the first chamber 211 will flow into the first auxiliary chamber 2121 through the second ventilation channel 217 to accelerate the downward movement of the piston plate 214. At the same time, another stream will flow into the recovery channel 110 through the airflow channel 200. Then, under the action of the negative pressure generating structure, a negative pressure is formed in the airflow channel 200 to suck up and recover the core rod.

[0075] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An air guiding structure for a pneumatic rivet gun, characterized in that: The device includes a gun body (1) having a cavity (100) inside, the cavity (100) extending to the end of the gun body (1) forming an opening (101) for feeding in a core rod; a core-pulling component (11) for clamping a core-pulling rivet and pulling out the core rod, the core-pulling component (11) being disposed in the cavity (100), the core-pulling component (11) having a recovery channel (110) communicating with the opening (101), the recovery channel (110) having a negative pressure generating structure, the recovery channel (110) for receiving the core rod entering from the opening (101), and the end of the recovery channel (110) away from the opening (101) extending to communicate with the outside; A gun handle (2) is connected to the gun body (1); the gun handle (2) is provided with an airflow channel (200), one end of the airflow channel (200) extends to the outer surface of the gun handle (2) to form an air inlet (201) for receiving compressed gas, and the other end of the airflow channel (200) extends into the gun body (1) and communicates with the recovery channel (110); the gun handle (2) is also provided with a gas flow interval structure (21), which is used to allow compressed air to pass through the recovery channel (110) at intervals, and the gun handle (2) is provided with a button (22) to help control the on / off of compressed air; The gas flow interval structure (21) includes a first chamber (211) and a second chamber (212) disposed in the gun handle (2); the first chamber (211) is provided with a piston (213), the piston (213) has a first sub-chamber (2111) and a second sub-chamber (2112) inside, and the first sub-chamber (2111) and the second sub-chamber (2112) are connected to each other, the air inlet (201) is connected to the second sub-chamber (2112), and the button (22) is used to release the gas in the first sub-chamber (2111); The second chamber (212) is provided with a piston plate (214), which divides the second chamber (212) into a first sub-chamber (2121) and a second sub-chamber (2122) in sequence. The piston plate (214) moves upward to allow the core-pulling member (11) to clamp the core rod, and the piston plate (214) moves downward to allow the core-pulling member (11) to rivet and pull out the core rod to the opening (101). The gun handle (2) has a first ventilation channel (216) that connects the first chamber (211) and the second sub-chamber (2122). The first ventilation channel (216) is used to introduce compressed air from the second sub-chamber (2112) into the second sub-chamber (2122), thereby causing the piston plate (214) to move upward. The airflow channel (200) is connected to the first chamber (211). The gun handle (2) has a second ventilation channel (217) that connects the first chamber (211) and the first sub-chamber (2121). The second ventilation channel (217) is used to introduce compressed air from the second sub-chamber (2112) into the first sub-chamber (2121), thereby facilitating the downward movement of the piston plate (214).

2. The air guiding structure of a pneumatic rivet gun according to claim 1, characterized in that: A sealing ring (3) is provided between the piston plate (214) and the second chamber (212).

3. The air guiding structure of a pneumatic rivet gun according to claim 1, characterized in that: An air seal (4) for increasing sealing is provided between the first chamber (211) and the piston (213).

4. The air guiding structure of a pneumatic rivet gun according to claim 3, characterized in that: The gas seal (4) is made of polytetrafluoroethylene.

5. The air guiding structure of a pneumatic rivet gun according to claim 1, characterized in that: The second chamber (212) is provided with a guide post (215), and the piston plate (214) is provided with a guide hole (2141). The guide post (215) is inserted into the guide hole (2141); the first ventilation channel (216) is provided in the guide post (215).

6. The air guiding structure of a pneumatic rivet gun according to claim 1, characterized in that: The button (22) is located on the side wall of the gun handle (2) near the opening (101).

7. The air guiding structure of a pneumatic rivet gun according to claim 1, characterized in that: The button (22) has a protrusion.

8. A method for guiding air in the air guiding structure of a pneumatic rivet gun according to any one of claims 1-7, characterized in that, Includes the following steps: S1. Compressed air is introduced into the air inlet (201). The compressed air flows from the second sub-chamber (2112) into the first sub-chamber (2111). At this time, the piston (213) moves to the right and abuts against the right end face of the first chamber (211). S2. Press the button (22) to depressurize the first sub-chamber (2111). The depressurization causes the piston (213) to move to the left and abut against the left end face of the first chamber (211). At this time, the compressed air will flow from the first ventilation channel (216) into the second auxiliary chamber (2122). Then the piston plate (214) moves upward. S3. Releasing button (22) stops the depressurization of the first sub-chamber (2111). The piston (213) will move to the right, and the compressed gas in the second auxiliary chamber (2122) will flow back into the first chamber (211) through the first ventilation channel (216). At this time, one stream of compressed air in the first chamber (211) will flow into the first auxiliary chamber (2121) through the second ventilation channel (217) to help the piston plate (214) move down. At the same time, another stream will flow into the recovery channel (110) through the airflow channel (200).

Images