Connecting structure for firing pin and piston of pneumatic nailing gun

Abstract

The utility model provides a connecting structure for a firing pin and a piston of a pneumatic nailing gun, and belongs to the technical field of nailing guns. The problem of how to improve the stability of connection between a firing pin and a piston is solved. According to the connecting structure of the firing pin and the piston of the pneumatic nailing gun, an inserting piece is arranged at one end of the firing pin, a connecting piece is fixedly connected to the piston, a protrusion is arranged on the inserting piece, an inserting groove and a limiting groove are formed in the connecting piece, the inserting piece is located in the inserting groove, the protrusion is located in the limiting groove, a second fixing hole is further formed in the inserting piece, and the second fixing hole penetrates through the protrusion. The connecting piece is further provided with a first fixing hole, the first fixing hole is communicated with the limiting groove, when the firing pin is connected with the connecting piece, the first fixing hole and the second fixing hole are aligned, and the fixing piece is located in the first fixing hole and the second fixing hole. According to the scheme, the protrusion is arranged in the limiting groove, the protrusion plays a limiting role, relative movement between the piston and the firing pin is reduced, and connection between the piston and the firing pin is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of nail guns, in particular to a pneumatic nail gun, and more particularly to a connection structure between a firing pin and a piston of the pneumatic nail gun. Background Art

[0002] A nail gun is a tool that drives the fasteners inside it into the object. The nail gun includes a shell impact part, a lifting part, a locking part, a nail magazine, a nail ejection part, a power supply part, a control system, a motor and a reduction mechanism.

[0003] In existing nail guns, the striking part includes a striker and a piston. The striker is disposed in the piston, which moves within the cylinder. The piston, the cylinder, and the cylinder end cap form a closed air chamber. When the piston moves toward the end cap, the gas in the air chamber is compressed. The piston, under the action of the high-pressure gas, moves toward the end cap away from the cylinder. The piston drives the striker with it, and the striker strikes the nail in the nailing part to achieve nailing. The connection between the piston and the striker is generally achieved by forming a flat groove in the piston, inserting the striker into the groove, and finally fixing the striker and piston with a fixing member.

[0004] With the above fixing method, when the nail gun is in use, the piston is driven by the high-pressure gas to move the firing pin, and the piston and the firing pin may swing left and right in the horizontal direction, making the connection between the firing pin and the piston unstable. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems in the existing technology and to propose a connection structure between the striker and the piston of a pneumatic nail gun. The technical problem to be solved by the present invention is: how to improve the stability of the connection between the striker and the piston.

[0006] The purpose of the utility model is to improve the stability of the connection between the piston and the firing pin through the following technical solutions: a connection structure of a firing pin and a piston of a pneumatic nail gun, the nail gun comprising a nail-producing part and a striking part for driving the nail in the nail-producing part out of the nail gun along a first direction, the striking part comprising a firing pin and a piston connected to the firing pin, the firing pin reciprocating in a first direction and a second direction opposite to the first direction, characterized in that one end of the firing pin is provided with a plug-in component, the piston is fixedly connected to a connecting component, the plug-in component is provided with a protrusion, the connecting component is provided with a plug-in groove and a limiting groove, when the connecting component is fixedly connected to the firing pin, the plug-in component is located in the plug-in groove and the protrusion is located in the limiting groove, the plug-in component is further provided with a fixing hole 2, the fixing hole 2 passes through the protrusion, the connecting component is further provided with a fixing hole 1, the fixing hole 1 is connected to the limiting groove, when the firing pin and the connecting component are connected, the fixing hole 1 and the fixing hole 2 are aligned, and fixing components (38) are provided in the fixing hole 1 and the fixing hole 2.

[0007] When the firing pin and the piston are fixedly connected, the connector and the connector slot are engaged to prevent the firing pin and the piston from rotating in the vertical direction. At the same time, the protrusion and the limit slot are engaged, and the protrusion plays a limiting role to prevent the firing pin and the piston from rotating relative to each other in the horizontal direction. The second fixing hole passes through the protrusion to increase the contact area between the fixing part and the firing pin. When the fixing part is located in the first fixing hole and the second fixing hole, the firing pin and the piston are prevented from moving relative to each other in the horizontal direction. A tight fit is formed between the firing pin, the piston and the fixing part, and the firing pin and the piston are locked in the front and back, left and right, and up and down directions. The connection between the firing pin and the piston is more firm, and the firing pin can be limited by the nail plate in the nailing part during the nailing process, so that the piston is more stable during the movement.

[0008] In the above-mentioned connection structure between the firing pin and the piston of a pneumatic nail gun, the connector is in the shape of a flat plate, the protrusion is located in the middle of the upper and lower sides of the connector, and the protrusion is an arc-shaped protrusion.

[0009] In the connection structure between the firing pin and the piston of the pneumatic nail gun, the fixing member is a fixing pin or a rivet. When the fixing member is a rivet, the fixing member is not easy to fall out of the fixing hole 1 and the fixing hole 2.

[0010] In the aforementioned connection structure between the striker and the piston of a pneumatic nail gun, guide strips are provided on the upper and lower sides of the striker, the nail ejection portion includes a guide plate and a nail ejection plate, a stopper plate is provided below the guide plate, and the stopper plate, guide plate, and nail ejection plate are all provided with a guide groove 1 that cooperates with the guide strips. The cooperation between the guide groove 1 and the guide strips prevents the striker from deviating during movement.

[0011] In the aforementioned pneumatic nail gun firing pin and piston connection structure, the piston and the connecting member are provided separately or integrally. When the connecting member and the piston are provided separately, the connecting member and the piston are fixedly connected by threads. The threaded connection between the connecting member and the piston facilitates disassembly of the connecting member and the piston.

[0012] In the aforementioned connection structure between the striker and the piston of a pneumatic nail gun, the nail gun further includes a lifting portion for moving the striker in a second direction. The lifting portion includes a rotating disk having a latch provided on the rotating disk. The striker is provided with a protrusion corresponding to the latch, the protrusion engaging with the latch, and the protrusion extending outwardly toward one side of the striker along the width direction of the striker. A second guide groove is formed between the protrusion and the main body of the striker. The guide plate further includes a guide block that can slide within the second guide groove. The cooperation between the guide block and the second guide groove prevents the striker from deviating during movement.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. In this solution, by setting the protrusion in the limiting groove, the protrusion plays a limiting role.

[0015] It is used to reduce the relative movement between the piston and the striker, making the connection between the piston and the striker more stable.

[0016] 2. In this solution, the striker can be limited by the limiting plate, guide plate and nail-extruding plate in the nail-extruding part during the nailing process, so that the striker is more stable during the movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the pneumatic nail gun in the utility model;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the pneumatic nail gun in the utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the pneumatic nail gun of the present invention;

[0020] Figure 4 This is a schematic cross-sectional view of the pneumatic nail gun of the present invention;

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the pneumatic nail gun in the utility model;

[0022] Figure 6 This is a schematic diagram of the explosion structure of the lifting part of the pneumatic nail gun in the utility model;

[0023] Figure 7This is a schematic structural diagram of the firing pin and piston of the pneumatic nail gun of the present invention;

[0024] Figure 8 This is a schematic cross-sectional view of the pneumatic nail gun of the present invention;

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

[0026] Figure 10 This is a schematic cross-sectional view of the pneumatic nail gun of the present invention;

[0027] Figure 11 This is a schematic cross-sectional view of the pneumatic nail gun of the present invention;

[0028] Figure 12 This is a schematic cross-sectional view of the pneumatic nail gun of the present invention;

[0029] Figure 13 This is a schematic cross-sectional view of the pneumatic nail gun of the present invention;

[0030] Figure 14 This is a schematic cross-sectional view of the pneumatic nail gun of the present invention;

[0031] Figure 15 It is a structural schematic diagram of the second pawl of the pneumatic nail gun in the utility model.

[0032] In the figure, 1, striking part; 2, cylinder; 3, air chamber; 4, striker; 4a, protrusion; 4b, groove; 4c, connector; 4d, protrusion; 4e, second fixing hole; 4f, guide strip; 5, piston; 5a, piston guide; 5b, piston seal; 6, buffer seat; 7, cylinder end cover; 8, mounting seat; 8a, mounting plate; 8b, mounting cylinder; 8c, limit cavity; 8d, boss; 9, outlet Nail portion; 10, guide plate; 10a, mounting post; 10b, guide block; 11, lifting portion; 12, rotating disk; 12a, mounting hole; 12b, second ratchet; 12c, retaining ring; 12d, gear tooth 1; 12e, gear tooth 2; 13, rotating shaft; 14a, bearing 1; 14b, bearing 2; 15, cover plate; 16, bayonet pin; 17, rotating member; 17a, fixing post; 18, separation post; 19. First pawl; 20. Ring gear; 20a. Limit block; 20b. First ratchet; 21. Second pawl; 21a. Separator; 21b. Separator; 21c. Buffer; 22. First spring; 23. Second spring; 24. First bearing; 26. Speed ​​reduction mechanism; 27. Motor; 28. Control system; 29. ​​First position sensor; 30. Second position sensor; 31. Third position sensor; 32. Trigger switch; 33. Nail magazine; 34. Control switch; 35. Nail ejector plate; 36. Safety switch; 37. Connector; 37a. Connecting slot; 37b. Limit slot; 37c. Fixing hole 1; 38. Fixing pin; 39. Guide slot 1; 40. Housing; 41. Handle; 42. Limit column; 43. Support column; 44. Washer; 45. Limit plate; 46. Guide slot 2. DETAILED DESCRIPTION

[0033] The following are specific embodiments of the present invention and the accompanying drawings.

[0034] The technical solutions are further described in detail, but the present invention is not limited to these embodiments.

[0035] Example 1

[0036] like Figure 1 、 Figure 2 and Figure 3 As shown, the connection structure between the striker and piston of a pneumatic nail gun is primarily designed to drive nails into objects to be fastened with fasteners, such as furniture. The nail gun includes a housing 40, a handle 41, a striking member 1, a lifting member 11, a nail magazine 33, a nail ejector 9, a power supply, a control system 28, a motor 27, and a speed reduction mechanism 26. The nail magazine 33 is positioned below the nail ejector 9 and contains nails. The nails in the magazine 33 enter the nail ejector 9. The nails in the nail ejector 9 are then driven out by the nail pusher mechanism and replenished by the nail ejector 9.

[0037] The nail gun includes a motor 27. The output shaft of motor 27 rotates in one direction when powered. A reduction mechanism 26 is connected to motor 27. The output shaft of reduction mechanism 26 is connected to rotating shaft 13 in lifting portion 11, driving rotation of rotating shaft 13. A battery is located below handle 41 to power motor 27 and a control system 28.

[0038] The impact part 1 of the nail gun is a structure that drives nails into the object to be fastened. The impact part 1 of the nail gun includes a cylinder 2. The cylinder 2 is hollow and cylindrical. The cylinder 2 includes an inner cylinder wall. A cylinder end cap 7 is provided at one end of the cylinder 2 to seal the end of the cylinder 2. The cylinder end cap 7 and the piston 5 form an air chamber 3 within the cylinder 2 for storing compressed fluid. In addition to being filled with air, the air chamber 3 can also be filled with an inert gas. As an example, the inert gas includes nitrogen and rare gases.

[0039] like Figure 3 As shown, a movable piston 5 is mounted on the inner wall of the cylinder 2. The piston 5 is cylindrical and has an annular piston seal 5b, an oil reservoir, and a piston guide 5a on its side. The piston guide 5a is located on either side of the piston seal 5b. The oil reservoir, which is not shown, is used to store grease and is located between the piston seal 5b and the piston guide 5a. The piston guide 5a is made of plastic and ensures smooth movement of the piston within the cylinder 2, preventing deviation and reducing friction between the piston 5 and the inner wall of the cylinder 2. The piston 5 reciprocates within the cylinder 2 along a line A, which is an imaginary line representing the centerline of the cylinder 2. The piston seal 5b contacts the inner wall of the cylinder 2, forming a sealing surface between the piston 5 and the inner wall of the cylinder 2, thereby preventing leakage of compressed gas within the air chamber 3. A magnet is located within the piston 5 and can be detected by a position sensor to determine the position of the piston 5 within the cylinder 2.

[0040] like Figure 3 、 Figure 5 and Figure 7 As shown, the striking part 1 also includes a striker 4 for pushing the nail to move. The striker 4 moves back and forth in the nail gun in a first direction F1 and a second direction F2 opposite to the first direction F1. When the striker 4 moves in the first direction F1, the nail gun realizes the nailing function. When the striker 4 moves in the second direction F2, the striker 4 resets, the gas in the air chamber 3 is compressed, and the piston 5 is subjected to high pressure.

[0041] like Figure 1 、 Figure 2 and Figure 5 As shown, the striking part 1 further includes a striker 4 for pushing the nail to move and a lifting part 11 for driving the striker 4 to move.

[0042] like Figure 7 As shown, the striker 4 is elongated, with a cylindrical front end for striking the nail. The striker 4 and piston 5 are fixed together by a flat connector 4c provided at one end of the striker 4. A connector 37 is threadedly connected to the piston 5. The connector 4c and connector 37 are connected by a fixing member 38. In this embodiment, the fixing member 38 is a fixing pin. Alternatively, the fixing member 38 may be a rivet. An arc-shaped protrusion 4d is provided in the middle position of the plug-in component 4c, and the connecting component 37 is provided with a plug-in groove 37a and a limit groove 37b. The plug-in component 4c is located in the plug-in groove 37a and the protrusion 4d is located in the limit groove 37b. The plug-in component 4c is also provided with a second fixing hole 4e, and the second fixing hole 4e passes through the protrusion 4d. The connecting component 37 is also provided with a first fixing hole 37c, and the first fixing hole 37c is connected to the limit groove 37b. When the striker 4 and the connecting component 37 are connected, the first fixing hole 37c and the second fixing hole 4e are aligned, and the fixing component 38 is located in the first fixing hole 37c and the second fixing hole 4e.

[0043] like Figure 8 As shown, the striker 4 is also equipped with curved guide strips 4f on its upper and lower sides. In this embodiment, the guide strips 4f and the protrusions 4d are integrated. The nail ejection portion 9 includes a guide plate 10 and a nail ejection plate 35. A stop plate 45 is also provided below the guide plate 10. The stop plate 45, the guide plate 10, and the nail ejection plate 35 are all provided with guide grooves 1 and 39 that mate with the guide strips 4f. Multiple protrusions 4a are distributed along one side of the striker 4 to help lift the striker 4. These protrusions 4a extend outward along the width of the striker 4. In this embodiment, there are nine protrusions 4a, with spacing between adjacent protrusions 4a forming a groove 4b. A guide groove 2 46 is formed between each protrusion 4a and the main body of the striker 4. The guide plate 10 is also provided with a guide block 10b that slides within the guide groove 2 46.

[0044] like Figure 1 、 Figure 4 and Figure 7 As shown, the other end of the cylinder body 2 is fixed on the mounting base 8, and an exhaust hole is provided on the mounting base 8, and the striker 4 can pass through the exhaust hole.

[0045] A buffer seat 6 is also provided on the mounting seat 8 , and the buffer seat 6 is located between the mounting seat 8 and the cylinder body 2 .

[0046] like Figure 4 Combine Figure 14As shown, a mounting plate 8a is provided at the front end of the mounting base 8, and a nail output portion 9 is provided below the mounting plate 8a. The nail output portion 9 includes a guide plate 10 fixed below the mounting plate 8a and a nail output plate 35 located below the guide plate 10. The nail magazine 33 is fixed to the nail output plate 35. In the mounting base 8, a mounting cylinder 8b is further provided on the side of the mounting plate 8a. The mounting cylinder 8b is provided with a lifting portion 11 that drives the striker 4 to move.

[0047] like Figure 3 Combine Figure 4 and Figure 6 As shown, the lifting portion 11 includes a rotating shaft 13. Two bearings, bearing 14a and bearing 2 14b, are vertically disposed within the mounting tube 8b. The lower bearing 14b is mounted in a mounting groove within the mounting tube 8b. A cover plate 15 is fixedly connected to the mounting tube 8b. The cover plate 15 also has a mounting groove disposed therein. The upper bearing 14a is located within the mounting groove within the cover plate 15. The rotating shaft 13 is mounted at both ends on the two bearings and rotates around its axis B. The lower end of the rotating shaft 13 is connected to a reduction mechanism 26, which has a racetrack-shaped hole disposed therein. The lower portion of the rotating shaft 13 corresponds to and is inserted into the racetrack-shaped hole, thereby driving the rotating shaft 13 in rotation.

[0048] like Figure 3 Combine Figure 4 and Figure 6 As shown, the lifting part 11 also includes a rotating disk 12 arranged on the rotating shaft 13. The rotating disk 12 has a plurality of mounting holes 12a arranged along the rotation direction. The mounting holes 12a are annular and are continuously spaced apart on the rotating disk 12. A bayonet 16 is provided in each mounting hole 12a. The bayonet 16 is annular and is continuously spaced apart on the rotating disk 12. The bayonet 16 is cylindrical, and a limiting plate is provided below the bayonet on the rotating disk 12. The limiting plate prevents the bayonet 16 from falling out of the mounting hole 12. The bayonet 16 can rotate along its center in the mounting hole 12a but cannot move in the radial direction of the rotating disk 12. During the lifting process of the striker 4, the bayonet 16 is located in the groove 4b, and the bayonet 16 abuts against the corresponding protrusion 4a. The bayonet 16 can rotate around its center, which can reduce the wear between the bayonet 16 and the protrusion 4a. A second ratchet wheel 12 b is provided at the upper end of the rotating disk 12 . A circle of gear teeth is evenly distributed on the second ratchet wheel 12 b . The gear teeth of the second ratchet wheel 12 b face outward along the center of the rotating disk 12 .

[0049] like Figure 9 As shown, from a top view, in this embodiment, the motor 27 drives the rotating disk 12 to rotate counterclockwise.

[0050] like Figure 3As shown, a first bearing 24 is sleeved on the rotating shaft 13. The first bearing 24 and the rotating shaft 13 are axially fixed. The first bearing 24 is located between the rotating disk 12 and the rotating shaft 13 and is located on the inner side of the rotating disk 12. In this embodiment, the upper end of the first bearing 24 abuts against the inner end surface of the rotating disk 12. The rotating disk 12 is also provided with a limiting member for limiting the first bearing 24 in the rotating disk 12. The limiting member is a clamp embedded in the inner wall of the rotating disk 12. A retaining ring 12c is provided on the rotating disk 12, and the first bearing 24 is located above the retaining ring 12c. A support column 43 is also provided between the first bearing 24 and the second bearing 14b.

[0051] like Figure 5 and Figure 6 As shown, a rotating member 17 is fixed to the rotating shaft 13 via threads. The rotating member 17 is flat and has a first pawl 19 rotatably mounted on the rotating member 17. The first pawl 19 is mounted on the rotating member 17 via a connecting column. A first spring 22 is disposed between the first pawl 19 and the rotating member 17. One end of the first spring 22 is mounted on the rotating member 17, and the other end of the first spring 22 is mounted on the first pawl 19. A washer 44 is disposed between the first pawl 19 and the rotating member 17. A boss 8d is provided on the inner sidewall of the mounting tube 8b. The boss 8d is provided with a ring gear 20 that cooperates with the first pawl 19. The inner side surface of the ring gear 20 is provided with a first ratchet tooth 20b. The first pawl 19 is located inside the ring gear 20 and engages with the first ratchet tooth 20b to limit the rotation of the rotating shaft 13. A limiting cavity 8c is also provided on the mounting base 8. A limiting block 20a is disposed on the ring gear 20 and is located within the limiting cavity 8c.

[0052] The lifting assembly includes a second ratchet 12b mounted on the rotating disk 12 and a second pawl 21 mounted on the rotating member 17. The second ratchet 12b is positioned in the center of the rotating disk 12 and below the rotating member 17. The second pawl 21 meshes with the teeth of the second ratchet 12b. In this embodiment, the meshing of the second pawl 21 with tooth 12d is used as an example. The second pawl 21 is also provided with a separating member 21a for separating the second pawl 21 from the second ratchet 12b. A separating post 18 is positioned within the limiting cavity 8c, engaging with the separating member 21a. A portion of the separating post 18 is positioned within the mounting tube 8b. When the separating member 21a abuts against the separating post 18, the second pawl 21 separates from the second ratchet 12b.

[0053] The first pawl 19 and the second pawl 21 are arranged opposite each other. The first ratchet teeth 20b are one-way teeth, and the teeth of the second ratchet face outward along the center of the rotating disk 12. A fixed post 17a is provided on the rotating member 17, and the second pawl 21 is rotatably mounted on the fixed post 17a. A second spring 23 is provided between the second pawl 21 and the rotating member 17. One end of the second spring 23 is mounted on the rotating member 17, and the other end of the second spring 23 is mounted inside the separating member 21a. The guide plate 10 is provided with a mounting post 10a located within the limiting cavity 8c. The separating member 18 is mounted on the mounting post 10a and is located below the limiting block 20a. A limiting post 42 is also mounted on the mounting post 10a and is located between the separating member 18 and the limiting block 20a. The limiting post 42 abuts against the separating member 18. The limiting block 20a and the separating member 18 jointly limit the separating member 18 to prevent it from moving upward.

[0054] The projection of the outer end surface of the release member 21a on a horizontal plane forms a linear buffer portion 21c and an arcuate release portion 21b. When the striker 4 moves in the second direction F2, the second pawl 21 engages with the second ratchet 12b, and the release member 21a and the release post 18 are no longer in contact. When the striker 4 moves in the first direction, the arcuate release portion 21b of the release member 21a contacts the release post 18, causing the pawl to rotate about the connecting axis, and the second pawl 21 disengages from the second ratchet 12b.

[0055] The striker 4 moves with the piston 5, and the piston 5 has three positions in the cylinder 2.

[0056] Including top dead center, bottom dead center and locking point.

[0057] like Figure 4 As shown, a first sensor 29 , a second sensor 30 and a third sensor 31 are provided on the housing of the nail gun and on the outside of the cylinder 2 , wherein the first sensor 29 is used to detect whether the piston 5 moves to the locking point. Figure 8 and Figure 9As shown, the piston 5 is at the locking point in the cylinder 2. At this time, the first sensor 29 detects that the piston 5 has moved to the locking point, and the control system 28 controls the motor 27 to stop. The first pawl 19 engages with the first ratchet tooth 20b on the ring gear 20, the rotating member 17 stops rotating, and the rotating shaft 13 stops rotating. Because the second pawl 21 engages with the tooth 12d on the second ratchet wheel 12b, in this example, the second pawl 21 and the rotating disk 12 stop rotating. The latch 16 on the rotating disk 12 engages with the protrusion 4a on the striker 4, and the striker remains locked. When the motor 29 stops, the piston 5 may move downward from the locking point for a distance because the first pawl 19 and the first ratchet tooth 20b may not have yet engaged. Under the action of the high-pressure gas in the air chamber 3, the piston 5 moves a distance in the direction F1 until the first pawl 19 and the first ratchet tooth 20b engage, and the piston 5 stops moving. If the first pawl 19 and the first ratchet tooth 20 b are just engaged when the piston 5 is at the locking point, the piston 5 will not move in the first direction F1 .

[0058] like Figure 12 and Figure 13 As shown, the piston is at its bottom dead center within the cylinder. After the nail gun fires a nail, the piston 5 moves to its bottom dead center under the action of the high-pressure gas. The control system 28 controls the motor 27 to continue rotating. The motor 27 drives the rotating shaft 13 via the reduction mechanism 26. The rotating member 17 on the rotating shaft 13 rotates with the rotating shaft 13 and drives the second pawl 21 to move. At this time, the separating member 21a is separated from the separating column 18, and the second pawl 21 rotates under the action of the second spring 23, engaging the second pawl 21 with the gear teeth 12d on the second ratchet 12b. During normal operation of the nail gun, the meshing position of the second pawl 21 and the gear teeth on the second ratchet 12b corresponds to the engagement position of the latch 16 on the rotating disk 12 and the protrusion 4a on the striker 4.

[0059] like Figure 1 Combine Figure 8 and Figure 13 As shown, this is the top dead center of the piston 5 in the cylinder 2. The projection of the outer end surface of the separator 21a on the horizontal plane is the arc-shaped separator 21b against the separator column 18. The separator 21a drives the second pawl 21 to rotate, so that the second pawl 21 and the second ratchet 12b are separated, and the rotating shaft 13 and the rotating disk 12 are no longer combined with each other. The piston 5 is affected by the high-pressure gas in the air chamber 3, driving the striker 4 to move in the first direction, and the striker 4 drives the rotating disk 12 to rotate, and the striker 4 realizes nailing.

[0060] The third sensor 31 and the second sensor 30 are located between the locking point and the bottom dead center. The distance from the third position sensor 31 to the bottom dead center must be smaller than the distance from the third position sensor 31 to the locking point. They are used to detect whether the nail gun is stuck. The distance from the third sensor 31 to the bottom dead center can be set to half the length of a nail. If the third position sensor 31 does not detect the piston 5 during a nailing process, it indicates that the nail gun is stuck. The distance from the second position sensor 30 to the locking point must be smaller than the distance from the second position sensor 30 to the bottom dead center. The function of the second position sensor is described in the working principle.

[0061] like Figure 1 As shown, the power supply unit has a storage housing and a plurality of battery cells housed in the storage housing. The nail gun also includes a safety switch 36, a control switch 34, and a trigger switch 32. When the control switch 34 is pressed, the control system 28 of the nail gun can start working. The trigger switch 32 and the control switch 34 are both set on the handle. The trigger switch 32 detects the presence or absence of operating force applied to the handle. The trigger switch 32 is connected to the control system 28 and outputs a signal corresponding to the detection result. The safety switch 36 is also connected to the control system 28. When the nail gun is in use, the safety switch 36 is pressed against the object, and when the trigger switch 32 is turned on, the nail gun can achieve nailing.

[0062] The working principle of the nail gun is as follows: Figure 12 and Figure 13 As shown, when the nail gun is not turned on, the piston 5 is at the bottom dead center, so that the gas in the air chamber is not in a compressed state, thereby improving the safety of the nail gun; Figure 8 and Figure 9 As shown, when the nail gun is turned on and the gun control switch 34 is turned on, the motor 27 works, and the motor 27 drives the rotating shaft 13 to rotate through the reduction mechanism 26. Since the second pawl 21 is engaged with the gear tooth 12d, the rotating shaft 13 drives the rotating disk 12 to rotate, and the latch 16 on the rotating disk 12 abuts against the protrusion 4a of the striker 4 to lift the striker 4, and the piston 5 moves from the bottom dead center to the locking point. The outer end surface of the separator 21a is projected on the horizontal plane as a straight buffer portion 21c opposite to the separator column 18. At this time, the second pawl 21 is still engaged with the gear tooth 12d; as shown in FIG. Figure 10 and Figure 11As shown, when the nail gun is turned on and the safety switch 36 and the trigger switch 32 are both turned on, the motor 27 drives the rotary disk 12 to rotate through the reduction mechanism 26. When the piston 5 moves from the locking point to the top dead center, when the piston 5 moves to the top dead center, the outer end surface of the separator 21a is projected on the horizontal plane as an arc separation portion 21b and contacts the separation column 1, and the separator 21a rotates toward the center of the rotary disk 12. The second pawl 21 rotates away from the center of the rotary disk 12 and disengages from the gear tooth 12d. The rotary disk 12 is separated from the rotating shaft 13, and the second spring 23 is in a compressed state. The piston 5 is acted upon by the high-pressure gas in the air chamber 3 and moves from the top dead center to the first direction. The front end of the striker 4 hits the nail to achieve nailing. In this process, the striker 4 drives the rotary disk 12 to rotate together but does not drive the rotating shaft 13 to rotate. Figure 6 As shown, from a top-down perspective, the striker 4 drives the rotating disk 12 to rotate clockwise. During the process of the piston 5 moving from the top dead center to the bottom dead center, the second position sensor 30 detects the piston 5 once. After the nailing is completed, the piston 5 reaches the bottom dead center. When the piston 5 moves to the bottom dead center, the separator 21a disengages from the separation column 18, and the second pawl 21 moves toward the center of the rotating disk 12 under the action of the second spring 23 and re-engages with the second ratchet 12b. The gear teeth on the second ratchet 12b that engage with the second pawl 21 when the piston 5 moves to the bottom dead center are also the gear teeth on the second ratchet 12b that engage with the second pawl 21 when the piston 5 is at the locking point, that is, gear tooth 12d. Because when the piston 5 is at the bottom dead center, the pin 16 on the rotating disk 12 and the protrusion 4a on the firing pin 4 correspond to each other, and when the piston 5 moves from the bottom dead center to the locking point, the second pawl 21 remains engaged with the gear teeth on the second ratchet 12b. In order to enable the nail gun to repeatedly nail, the gear teeth on the second ratchet 12b that engage with the second pawl 21 when the piston 5 moves to the bottom dead center are also the gear teeth on the second ratchet 12b that engage with the second pawl 21 when the piston 5 is at the locking point. After nailing is completed, the motor 27 continues to rotate and drives the rotating shaft 13 to rotate through the reduction mechanism 26. The rotating shaft 13 drives the rotating disk 12 to rotate, and the rotating disk 12 drives the striker 4 to move in the second direction. During this process, the piston 5 will be detected by the second position sensor for the second time. At this time, the motor 27 continues to rotate and will not stop until the piston 5 moves to the locking point. The motor 27 is powered off. Since the first pawl 19 is engaged with the first ratchet, and the rotating disk 12 and the rotating shaft 13 are in a combined state, the rotating shaft 13 does not rotate in the opposite direction. The rotating shaft 13 fixes the rotating disk 12 and locks the striker 4, completing a nailing cycle.

[0063] During the nailing process, the piston 5 is not detected by the third position sensor 31, and the piston 5 has returned to the locking point, which indicates that the piston 5 and the firing pin 4 have not been driven down and the nail is stuck. Then the red light of the nail gun flashes to remind you to deal with the stuck nail. After the nail is dealt with, since the piston 5 has not reached the bottom dead center, the teeth on the second pawl 21 and the second ratchet 12b are misaligned, and the second pawl 21 and other teeth on the second ratchet are engaged, such as the tooth 2 12e in the figure. The piston 5 does not need to reach the top dead center. The second pawl 21 will rotate under the action of the separation column 18, and the second pawl 21 and the second ratchet are disengaged again. The piston 5 moves in the first direction under the action of the high-pressure gas. At this time, since there is no nail stuck, the piston 5 will reach the bottom dead center. After the separation piece 21a and the separation column 18 are disengaged, the second pawl 21 and the second ratchet are re-engaged. At this time, the second pawl 21 is re-engaged with the tooth 1 12d on the second ratchet, and the nail gun resumes normal operation.

[0064] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0065] Although this document frequently uses terms such as 1. striking portion; 2. cylinder body; 3. air chamber; 4. striker; 4a. protrusion; 4b. groove; 4c. connector; 4d. protrusion; 4e. second fixing hole; 4f. guide strip; 5. piston; 5a. piston guide; 5b. piston seal; 6. buffer seat; 7. cylinder end cover; 8. mounting seat; 8a. mounting plate; 8b. mounting cylinder; 8c. limiting cavity; 8d. boss; 9. nail ejection portion; 10. guide plate, the use of other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A connection structure of a firing pin and a piston of a pneumatic nail gun, wherein the nail gun comprises a nail-extracting portion (9) and a striking portion (1) for driving a nail in the nail-extracting portion (9) out of the nail gun along a first direction, wherein the striking portion (1) comprises a firing pin (4) and a piston (5) connected to the firing pin (4), wherein the firing pin (4) reciprocates in a first direction and a second direction opposite to the first direction, and wherein the firing pin (4) reciprocates in a first direction and a second direction opposite to the first direction, and wherein the firing pin (4) reciprocates in a first direction and a second direction opposite to the first direction, One end of the striker (4) is provided with a connector (4c), one side of the piston (5) is provided with a connecting piece (37), the connector (4c) is provided with a protrusion (4d), the connecting piece (37) is provided with a plug-in groove (37a) and a limit groove (37b), when the connecting piece (37) is fixedly connected to the striker (4), the connector (4c) is located in the plug-in groove (37a) and the protrusion (4d) is located in the limit groove (37b), the The connector (4c) is further provided with a second fixing hole (4e), the second fixing hole passes through the protrusion (4d), the connecting member (37) is further provided with a first fixing hole (37c), the first fixing hole (37c) is communicated with the limiting groove (37b), when the striker (4) and the connecting member (37) are connected, the first fixing hole (37c) and the second fixing hole (4e) are aligned, and fixing members (38) are provided in the first fixing hole (37c) and the second fixing hole (4e).

2. The connection structure between the firing pin and the piston of a pneumatic nail gun according to claim 1, characterized in that: The connector (4c) is in the shape of a flat plate, the protrusion (4d) is located in the middle of the upper and lower sides of the connector (4c), and the protrusion (4d) is an arc-shaped protrusion (4d).

3. The connection structure between the firing pin and the piston of a pneumatic nail gun according to claim 2, characterized in that: The fixing member (38) is a fixing pin or a rivet.

4. The connection structure between the firing pin and the piston of a pneumatic nail gun according to claim 3, characterized in that: The striker (4) is further provided with guide strips (4f) on the upper and lower sides, the nail-out portion (9) comprises a guide plate (10) and a nail-out plate (35), a limit plate (45) is further provided below the guide plate (10), and the limit plate (45), the guide plate (10) and the nail-out plate (35) are all provided with a guide groove (39) that matches the guide strip (4f).

5. The connection structure between the firing pin and the piston of a pneumatic nail gun according to claim 4, characterized in that: The piston (5) and the connecting piece (37) are separately provided or integrally formed. When the connecting piece (37) and the piston (5) are separately provided, the connecting piece (37) and the piston (5) are fixedly connected via threads.

6. The connection structure between the firing pin and the piston of a pneumatic nail gun according to claim 5, characterized in that: The nail gun also includes a lifting part (11) for moving the firing pin (4) in a second direction, the lifting part (11) includes a rotating disk (12), a latch (16) is provided on the rotating disk (12), a protrusion (4a) corresponding to the latch (16) is provided on the firing pin (4), the protrusion (4a) is engaged with the latch (16), the protrusion (4a) extends outwardly toward one side of the firing pin (4) along the width direction of the firing pin (4), a guide groove 2 (46) is formed between the protrusion (4a) and the main body of the firing pin (4), and a guide block (10b) that can slide in the guide groove 2 (46) is also provided on the guide plate (10).

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