Pneumatic nailing gun

Abstract

The utility model provides a pneumatic nailing gun, and belongs to the technical field of nailing guns. The problem of how to reduce abrasion of a locking piece and a firing pin is solved. According to the pneumatic nailing gun, a lifting part comprises a rotating shaft and a rotating disc for driving a firing pin to move, the rotating shaft and the rotating disc are connected and arranged in a mounting cylinder, a rotating piece is arranged on the rotating shaft or the rotating disc, a first pawl is rotationally arranged on the rotating piece, a gear ring matched with the first pawl is further arranged in the mounting cylinder, and first ratchets are arranged on the inner side face of the gear ring; the first pawl is located on the inner side of the gear ring and engaged with the first ratchet to limit rotation of the rotating disc. By means of the structure, lifting, locking, unlocking and nailing of the firing pin can be achieved without arranging an additional locking structure on the firing pin, abrasion of the firing pin is reduced, the rotating disc, the rotating shaft, the first pawl used for locking the firing pin and the gear ring are all arranged in the mounting cylinder, and therefore the nailing gun is more compact in structure.

Description

Technical Field

[0001] This utility model relates to the field of nail gun technology, and more particularly to a nail gun, especially a pneumatic nail gun. Background Technology

[0002] A nail gun is a tool that drives fasteners into an object. A nail gun includes a housing, impact section, lifting section, locking section, nail magazine, nail ejection section, power supply section, control system, motor, and reduction mechanism.

[0003] In existing nail guns, the impact unit includes a firing pin and a piston. The firing pin is housed within the piston, and its movement is typically achieved using a rack and pinion transmission system. Specifically, a rack is mounted on the firing pin, and a gear is located in the lifting section. A drive motor in the lifting section rotates the gear. Because the rack and gear mesh, the rotation of the gear causes the rack to move laterally, compressing and storing energy in the gas. After the gas compression and energy storage are complete, the firing pin remains locked, with a locking element engaged with it. When the nail gun needs to drive a nail, the locking element disengages from the firing pin. Due to the high-pressure gas acting on the piston, the locking element experiences significant pressure upon disengagement, which can easily wear down both the locking element and the firing pin. Summary of the Invention

[0004] The purpose of this utility model is to address the aforementioned problems in existing technologies by proposing a pneumatic nail gun. The technical problem to be solved by this utility model is: how to reduce the wear of the locking parts and the firing pin.

[0005] The purpose of this utility model is to optimize the nail gun process through the following technical solution: A pneumatic nail gun includes a nail ejection section and an impact section for ejecting nails from the nail ejection section along a first direction. The impact section includes a firing pin, which reciprocates in the first direction and a second direction opposite to the first direction. The nail gun also includes a lifting section for moving the firing pin in the second direction. The lifting section includes a rotating shaft and a rotating disk that drives the firing pin. The rotating shaft and the rotating disk are connected and both are disposed in a mounting cylinder. The rotating shaft or the rotating disk is provided with a rotating component, and a first pawl is rotatably disposed on the rotating component. A gear ring that engages with the first pawl is also provided in the mounting cylinder. A first ratchet tooth is provided on the inner side of the gear ring. The first pawl is located inside the gear ring and engages with the first ratchet tooth to restrict the rotation of the rotating disk.

[0006] In this design, when a rotating component is installed on the rotating shaft, the rotation of the rotating shaft and the movement of the firing pin are synchronized. A first pawl is installed on the rotating component, and the first pawl and the gear ring cooperate to make the rotating shaft rotate in one direction. After the gas compression and energy storage are completed, the rotating shaft and the rotating disk remain engaged. Even when the motor is de-energized, the rotating disk remains locked, and the firing pin remains fixed, thus achieving the function of firing pin locking. When nailing is required, the rotating disk and the rotating shaft separate, and the firing pin moves in the first direction under the action of compressed gas to achieve nailing. The rotating disk rotates in the opposite direction under the action of the firing pin.

[0007] With the above structure, the firing pin can be lifted, locked, unlocked and nailed without the need for an additional locking mechanism on the firing pin, reducing the wear of the firing pin. Furthermore, the rotating disk, rotating shaft and the first pawl and toothed ring for firing pin locking are all located inside the mounting cylinder, saving installation space for the nail gun and making the nail gun structure more compact.

[0008] In the aforementioned pneumatic nail gun, the nail gun includes a mounting base, which includes a mounting cylinder and a limiting cavity. A boss is provided on the inner wall of the mounting cylinder, and the gear ring is mounted on the boss. A cover plate for fixing the gear ring is fixedly connected to the mounting cylinder. The cover plate and the boss work together to fix the gear ring inside the mounting cylinder.

[0009] In the aforementioned pneumatic nail gun, the toothed ring is further provided with a limiting block, which is located within a limiting cavity. The boss and the limiting cavity make the installation and fixation of the toothed ring more convenient.

[0010] In the aforementioned pneumatic nail gun, when a first pawl is connected to the rotating shaft, the rotating component is fixed on the rotating shaft and located above the rotating disk. The rotating shaft has a fixed rotating component located above the rotating disk, and the first pawl is rotatably mounted on the rotating component. The first pawl is located between the rotating component and the rotating disk, and is mounted on the rotating component via a connecting post. Positioning the first pawl between the rotating component and the rotating disk saves installation space and makes the assembly and disassembly of the first pawl more convenient.

[0011] In the aforementioned pneumatic nail gun, a first spring is provided between the first pawl and the rotating component. One end of the first spring is mounted on the rotating component, and the other end is mounted on the first pawl. A washer is provided between the first pawl and the rotating component. The first spring restricts the rotation of the first pawl, ensuring that the first pawl and the first ratchet teeth on the gear ring remain engaged, thus improving the locking effect. The washer reduces wear between the first pawl and the rotating component.

[0012] In the aforementioned pneumatic nail gun, the rotating shaft and the rotating disk are movably connected. The rotating disk and the rotating shaft are separated or joined by a lifting assembly. When the firing pin moves in the first direction, the firing pin drives the rotating disk to rotate. The rotating disk is movably mounted on the rotating shaft, and the rotating shaft and the rotating disk are separated and joined by the lifting assembly. When the rotating shaft and the rotating disk are joined, the rotating shaft drives the rotating disk to rotate together. When the rotating shaft and the rotating disk are separated, the firing pin drives the rotating disk to rotate during the nailing process.

[0013] In the aforementioned pneumatic nail gun, the lifting assembly includes a second ratchet mounted on a rotating disk and a second pawl mounted on a rotating component. The second ratchet is located in the center of the rotating disk and below the rotating component. The second pawl and the second ratchet mesh with each other. The second pawl also has a separating element for separating the second pawl and the second ratchet. A separating post that mates with the separating element is located within the limiting cavity. A portion of the separating post is located inside the mounting cylinder. When the separating element abuts against the separating post, the second pawl and the second ratchet separate. Simultaneously mounting the first and second pawls on the rotating component saves installation space.

[0014] In the aforementioned pneumatic nail gun, the rotating component is elongated, the first and second pawls are positioned opposite each other, the first ratchet tooth is a one-way tooth, and the center of the teeth of the second ratchet is aligned with the center of the rotating disk and faces outwards. The one-way nature of the first ratchet tooth prevents reverse rotation of the rotating shaft, and the outward alignment of the second ratchet teeth with the center of the rotating disk facilitates the separation of the second pawl and the second ratchet during nailing, reducing wear between them.

[0015] In the pneumatic nail gun described above, the rotating component is provided with a fixed post, the second pawl is rotatably mounted on the fixed post, and a second spring is provided between the second pawl and the rotating component. One end of the second spring is mounted on the rotating component, and the other end of the second spring is mounted on the inner side of the separating component.

[0016] In the aforementioned pneumatic nail gun, the second ratchet is located below the rotating component. The nail ejection section includes a guide plate, on which a mounting post is positioned within a limiting cavity. A separating post is sleeved on the mounting post and located below a limiting block. A limiting post is also sleeved on the mounting post, positioned between the separating post and the limiting block. Placing the mounting post, separating post, and limiting block all within the limiting cavity saves installation space for the nail gun. The limiting block and limiting post work together to limit the separating post, preventing it from detaching from the mounting post.

[0017] In the pneumatic nail gun described above, the locking pins are continuously spaced and arranged in a ring on the rotating disk. The firing pin has protrusions corresponding to the locking pins, which engage with the locking pins. The locking pins are cylindrical, and the distance between adjacent protrusions is greater than the diameter of the locking pin.

[0018] In the aforementioned pneumatic nail gun, the rotating disk and the rotating shaft are fixed together or integrally formed. The rotating disk is provided with locking pins, which are arranged in a ring at intervals on the rotating disk. The locking pins are not continuous on the rotating disk. The firing pin is provided with protrusions corresponding to the locking pins. The protrusions engage with the locking pins. The locking pins are cylindrical, and the distance between adjacent protrusions is greater than the diameter of the locking pin.

[0019] In the pneumatic nail gun described above, when the rotating disk is connected to the first pawl, the rotating disk and the rotating shaft are fixed together or integrally formed. The first pawl is set on the rotating disk through the second connecting post. A third spring is provided between the first pawl and the rotating disk. One end of the third spring is set on the rotating disk, and the other end of the third spring is set on the first pawl. A second washer is provided between the first pawl and the rotating disk.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. In this solution, the protrusion is always engaged with the locking pin, and the rotating disk and rotating shaft move together. By lifting the component and setting the first pawl on the rotating shaft, and setting the toothed ring on the mounting cylinder, the first pawl meshes with the first ratchet tooth on the toothed ring to realize the lifting, locking and unlocking of the firing pin. There is no need to set an additional locking structure on the firing pin, which reduces the wear of the firing pin.

[0022] 2. In this design, the rotating disk, rotating shaft, first pawl and toothed ring for locking the firing pin are all placed inside the mounting cylinder, saving installation space for the nail gun and making the nail gun structure more compact.

[0023] 3. In this solution, placing the mounting post, the separating post, and the limiting block inside the limiting cavity can save the installation space of the nail gun. The limiting block can also limit the separating post and prevent it from coming off the mounting post. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the pneumatic nail gun in this utility model;

[0025] Figure 2 This is a three-dimensional structural diagram of the pneumatic nail gun in this utility model;

[0026] Figure 3 This is a cross-sectional structural diagram of the pneumatic nail gun in this utility model;

[0027] Figure 4 This is a cross-sectional structural diagram of the pneumatic nail gun in this utility model;

[0028] Figure 5 This is a three-dimensional structural diagram of the pneumatic nail gun in this utility model;

[0029] Figure 6 This is an exploded structural diagram of the lifting section of the pneumatic nail gun in this utility model;

[0030] Figure 7 This is a schematic diagram of the firing pin and piston of the pneumatic nail gun in this utility model;

[0031] Figure 8 This is a cross-sectional structural diagram of the pneumatic nail gun in this utility model;

[0032] Figure 9 This is a cross-sectional structural diagram of the pneumatic nail gun in this utility model;

[0033] Figure 10 This is a cross-sectional structural diagram of the pneumatic nail gun in this utility model;

[0034] Figure 11 This is a cross-sectional structural diagram of the pneumatic nail gun in this utility model;

[0035] Figure 12 This is a cross-sectional structural diagram of the pneumatic nail gun in this utility model;

[0036] Figure 13 This is a cross-sectional structural diagram of the pneumatic nail gun in this utility model;

[0037] Figure 14 This is a cross-sectional structural diagram of the pneumatic nail gun in this utility model;

[0038] Figure 15 This is a schematic diagram of the structure of the second pawl of the pneumatic nail gun in this utility model;

[0039] Figure 16 This is a three-dimensional structural diagram of Embodiment 2 of the pneumatic nail gun in this utility model;

[0040] Figure 17 This is a three-dimensional structural diagram of Embodiment 2 of the pneumatic nail gun in this utility model;

[0041] Figure 18 This is a cross-sectional structural schematic diagram of Embodiment 2 of the pneumatic nail gun in this utility model;

[0042] Figure 19 This is a cross-sectional structural schematic diagram of Embodiment 2 of the pneumatic nail gun in this utility model.

[0043] In the diagram, 1. Impact part; 2. Cylinder; 3. Air chamber; 4. Strike pin; 4a. Protrusion; 4a1. Protrusion one; 4a2. Protrusion two; 4b. Groove; 4c. Connector; 4d. Raised; 4e. Fixing hole two; 4f. Guide bar; 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. Spike ejection part 10. Guide plate; 10a. Mounting post; 10b. Guide block; 11. Lifting part; 12. Rotary disk; 12a. Mounting hole; 12b. Second ratchet; 12c. Retaining ring; 12d. Gear tooth one; 12e. Gear tooth two; 13. Rotating shaft; 14a. Bearing one; 14b. Bearing two; 15. Cover plate; 15a. Clamping plate; 16. Clamping pin; 16a. Clamping pin one; 16b. Clamping pin two; 17. Rotating component; 17a. Fixed post; 18. 19. Separating column; 20. First pawl; 20. Gear ring; 20a. Limiting block; 20b. First ratchet tooth; 21. Second pawl; 21a. Separating component; 21b. Separating part; 21c. Buffer part; 22. First spring; 23. Second spring; 24. First bearing; 26. Reduction mechanism; 27. Motor; 28. Control system; 29. ​​First position sensor; 30. Second position sensor; 31. Third position sensor; 32. Trigger switch; 33. Nail box; 34. Control switch; 35. Nail ejector plate; 36. Safety switch; 37. Connector; 37a. Insertion slot; 37b. Limiting slot; 37c. Fixing hole one; 38. Fixing pin; 39. Guide slot one; 40. Housing; 41. Handle; 42. Limiting post; 43. Support post; 44. Washer one; 45. Limiting plate; 46. Guide slot two; 47. Connecting post one; 48. Connecting post two; 49. Washer two; 50. Third spring. Detailed Implementation

[0044] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0045] Example 1

[0046] like Figure 1 , Figure 2 and Figure 3 As shown, a pneumatic nail gun is mainly designed to drive nails into objects that need to be fastened, such as furniture. The nail gun includes a housing 40, a handle 41, an impact part 1, a lifting part 11, a nail magazine 33, a nail ejection part 9, a power supply part, a control system 28, a motor 27, and a reduction mechanism 26.

[0047] The nail box 33 is located below the nail ejection section 9. The nail box 33 contains nails. The nails in the nail box 33 will enter the nail ejection section 9. After the nails in the nail ejection section 9 are pushed out by the nail pusher structure, they will be replenished and enter the nail ejection section 9.

[0048] The nail gun includes a motor 27, whose output shaft rotates in one direction when the motor 27 is energized. A reduction gear 26 is connected to the motor 27, and the output shaft of the reduction gear 26 is connected to the rotating shaft 13 in the lifting part 11, driving the rotating shaft 13 to rotate. A battery is located below the handle 41, which provides power to the motor 27 and a control system 28.

[0049] The impact section 1 of the nail gun is a structure that drives the nail into the object to be fastened. The impact section 1 of the nail gun includes a cylinder 2, which is a hollow cylinder. The cylinder 2 includes an inner cylinder wall, and a cylinder end cap 7 is provided at one end of the cylinder 2 to seal one end of the cylinder 2. Under the action of the cylinder end cap 7 and the piston 5, a gas chamber 3 for storing compressed fluid is formed inside the cylinder 2. In addition to air, the gas chamber 3 can also be filled with an inert gas. As an example, inert gases include nitrogen and rare gases.

[0050] like Figure 3 As shown, a movable piston 5 is provided on the inner wall of cylinder 2. Piston 5 is cylindrical, and its side wall has an annular piston seal 5b, an oil reservoir, and a piston guide 5a. The piston guide 5a is located on both sides of the piston seal 5b. The oil reservoir is used to store lubricating grease and is located between the piston seal 5b and the piston guide 5a (not shown in the figure). The piston guide 5a is made of plastic and is used to ensure smooth movement of the piston within cylinder 2, preventing deviation and reducing friction between piston 5 and the inner wall of cylinder 2. Piston 5 reciprocates within cylinder 2 along a straight line A, which is an imaginary straight line representing the centerline of cylinder 2. The piston seal 5b contacts the inner wall of cylinder 2, forming a sealing surface between piston 5 and the inner wall of cylinder 2, making it difficult for compressed gas in the air chamber 3 to leak. A magnet is provided inside piston 5, which can be detected by a position sensor to determine the position of piston 5 within cylinder 2.

[0051] like Figure 3 , Figure 5 and Figure 7 As shown, the impact unit 1 also includes a firing pin 4 for pushing the nail to move. The firing pin 4 reciprocates in the nail gun in a first direction F1 and a second direction F2 opposite to the first direction F1. When the firing pin 4 moves in the first direction F1, the nail gun performs the nailing function. When the firing pin 4 moves in the second direction F2, the firing pin 4 resets, the gas in the gas chamber 3 is compressed, and the piston 5 is subjected to high pressure.

[0052] like Figure 1 , Figure 2 and Figure 5 As shown, the impact part 1 also includes a firing pin 4 for pushing the nail to move and a lifting part 11 for driving the firing pin 4 to move.

[0053] like Figure 7 As shown, the firing pin 4 is elongated, and the front section of the firing pin 4 is a cylindrical impact nail. The specific fixing method of the firing pin 4 and the piston 5 is that one end of the firing pin 4 is provided with a flat insert 4c, and the piston 5 is fixedly connected to the connector 37 by threads. The insert 4c and the connector 37 are connected by a fixing member 38. In this embodiment, the fixing member 38 is a fixing pin. As an alternative, the fixing member 38 can also be a rivet. The connector 4c has an arc-shaped protrusion 4d in the middle. The connector 37 has a plug groove 37a and a limiting groove 37b. The connector 4c is located in the plug groove 37a and the protrusion 4d is located in the limiting groove 37b. The connector 4c also has a second fixing hole 4e, which passes through the protrusion 4d. The connector 37 also has a first fixing hole 37c, which is connected to the limiting groove 37b. When the striker 4 and the connector 37 are connected, the first fixing hole 37c and the second fixing hole 4e are aligned. The fixing member 38 is located in the first fixing hole 37c and the second fixing hole 4e.

[0054] The upper and lower sides of the firing pin 4 are also provided with arc-shaped guide strips 4f. In this embodiment, the guide strips 4f and the protrusions 4d are integrated. The nail ejection part 9 includes a guide plate 10 and a nail ejection plate 35. A limiting plate 45 is also provided below the guide plate 10. The limiting plate 45, the guide plate 10 and the nail ejection plate 35 are all provided with guide grooves 39 that cooperate with the guide strips 4f.

[0055] Multiple protrusions 4a are distributed along one side of the firing pin 4 to lift it. The protrusions 4a extend outward along the width direction of the firing pin 4. In this embodiment, there are nine protrusions 4a. There is a gap between two adjacent protrusions 4a, forming a groove 4b. A guide groove 46 is formed between the protrusions 4a and the main body of the firing pin 4. The guide plate 10 is also provided with a guide block 10b that can slide within the guide groove 46.

[0056] like Figure 1 , Figure 4 and Figure 7 As shown, the other end of the cylinder 2 is fixed to the mounting base 8, which has an exhaust hole through which the firing pin 4 can pass. A buffer seat 6 is also provided on the mounting base 8, located between the mounting base 8 and the cylinder 2.

[0057] like Figure 4 Combination Figure 14As shown, a mounting plate 8a is provided at the front end of the mounting base 8, and a nail ejector 9 is provided below the mounting plate 8a. The nail ejector 9 includes a guide plate 10 fixed below the mounting plate 8a and a nail ejector plate 35 located below the guide plate 10. The nail cartridge 33 is fixed on the nail ejector plate 35. In the mounting base 8, a mounting cylinder 8b is also provided on the side of the mounting plate 8a. The mounting cylinder 8b is provided with a lifting part 11 that drives the firing pin 4 to move.

[0058] like Figure 3 Combination Figure 4 and Figure 6 As shown, the lifting part 11 includes a rotating shaft 13. Two bearings, bearing one 14a and bearing two 14b, are vertically arranged in the mounting cylinder 8b. The lower bearing two 14b is installed in a mounting groove in the mounting cylinder 8b. A cover plate 15 is fixedly connected to the mounting cylinder 8b, and a mounting groove is also provided in the cover plate 15. The upper bearing one 14a is located in the mounting groove in the cover plate 15. The two ends of the rotating shaft 13 are mounted on the two bearings and rotate around its axis B. A reduction mechanism 26 is connected to the lower end of the rotating shaft 13. The reduction mechanism 26 has a racetrack-shaped hole. The lower part of the rotating shaft 13 corresponds to and is inserted into this racetrack-shaped hole. The reduction mechanism 26 drives the rotating shaft 13 to rotate.

[0059] like Figure 3 Combination Figure 4 and Figure 6 As shown, the lifting part 11 also includes a rotating disk 12 disposed 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 arranged in a ring and continuously spaced on the rotating disk 12. A locking pin 16 is disposed in each mounting hole 12a. The locking pin 16 is arranged in a ring and continuously spaced on the rotating disk 12. The locking pin 16 is cylindrical, and a limiting piece is provided below the locking pin on the rotating disk 12, which prevents the locking pin 16 from dislodging from the mounting hole 12a. The locking pin 16 can rotate around its center in the mounting hole 12a but cannot move radially in the rotating disk 12. During the lifting of the firing pin 4, the locking pin 16 is located in the groove 4b and abuts against the corresponding protrusion 4a. The locking pin 16 can rotate around its center, which reduces wear between the locking pin 16 and the protrusion 4a. A second ratchet 12b is provided at the upper end of the rotating disk 12. A ring of teeth is evenly distributed on the second ratchet 12b, and the teeth of the second ratchet 12b are arranged outward along the center of the rotating disk 12.

[0060] like Figure 9 As shown in the figure, from a top view, in this embodiment, the motor 27 drives the rotating disk 12 to rotate counterclockwise.

[0061] like Figure 3As shown, a first bearing 24 is sleeved on the rotating shaft 13, and 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 inside the rotating disk 12. In this embodiment, the upper end of the first bearing 24 abuts against the inner end face of the rotating disk 12. The rotating disk 12 is also provided with a limiting member for limiting the first bearing 24 within the rotating disk 12. The limiting member is a clamp, which is 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.

[0062] like Figure 5 and Figure 6 As shown, a rotating component 17 is threadedly fixed to the rotating shaft 13. The rotating component 17 is flat, and a first pawl 19 is rotatably mounted on the rotating component 17. The first pawl 19 is mounted on the rotating component 17 via a connecting post 47. A first spring 22 is provided between the first pawl 19 and the rotating component 17, with one end of the first spring 22 mounted on the rotating component 17 and the other end mounted on the first pawl 19. A washer 44 is provided between the first pawl 19 and the rotating component 17. A boss 8d is provided on the inner wall of the mounting cylinder 8b, and a toothed ring 20 that mates with the first pawl 19 is provided on the boss 8d. A retaining plate 15a is provided below the cover plate 15 and embedded in the mounting cylinder. The retaining plate 15a and the boss 8d work together to confine the toothed ring 20 within the mounting cylinder 8b, preventing the toothed ring from moving vertically within the mounting cylinder. The inner side of the gear ring 20 is provided with a first ratchet 20b, and a first pawl 19 is located inside the gear ring 20 and meshes with the first ratchet 20b to restrict the rotation of the rotating shaft 13. A limiting cavity 8c is also provided on the mounting base 8, and a limiting block 20a is provided on the gear ring 20, with the limiting block 20a located inside the limiting cavity 8c.

[0063] The lifting assembly includes a second ratchet 12b mounted on a rotating disk 12 and a second pawl 21 mounted on a rotating member 17. The second ratchet 12b is located in the middle of the rotating disk 12 and below the rotating member 17. The teeth of the second pawl 21 and the second ratchet 12b mesh. In this embodiment, the meshing of the second pawl 21 and tooth 12d is taken as an example. The second pawl 21 is also provided with a separating member 21a for separating the second pawl 21 and the second ratchet 12b. A separating post 18 that cooperates with the separating member 21a is provided in the limiting cavity 8c. A part of the separating post 18 is located in the mounting cylinder 8b. When the separating member 21a abuts against the separating post 18, the second pawl 21 and the second ratchet 12b separate.

[0064] The first pawl 19 and the second pawl 21 are arranged opposite each other. The first ratchet tooth 20b is a one-way tooth, and the teeth of the second ratchet are outward along the center of the rotating disk 12. A fixed post 17a is provided on the rotating component 17. 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 component 17. One end of the second spring 23 is provided on the rotating component 17, and the other end of the second spring 23 is provided on the inner side of the separating component 21a. A mounting post 10a is provided on the guide plate 10, located in the limiting cavity 8c. A separating post 18 is sleeved on the mounting post 10a and is located below the limiting block 20a. A limiting post 42 is also sleeved on the mounting post 10a. The limiting post 42 is located between the separating post 18 and the limiting block 20a. The limiting post abuts against the separating post 18. The limiting block 20a and the separating post 18 together limit the separating post 18 and prevent the separating post from moving upward.

[0065] The outer end face of the separating member 21a includes a buffer portion 21c whose projection on the horizontal plane is a straight line and a separating portion 21b that is an arc. When the firing pin 4 moves in the second direction F2, the second pawl 21 and the second ratchet 12b engage, and the separating member 21a and the separating post 18 do not contact each other. When the firing pin 4 moves in the first direction, the separating portion 21b of the separating member 21a contacts the separating post 18, the pawl rotates around the connecting shaft, and the second pawl 21 disengages from the second ratchet 12b.

[0066] The firing pin 4 moves with the piston 5, which has three positions in the cylinder 2: top dead center, bottom dead center, and locking point.

[0067] 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. The first sensor 29 is used to detect whether the piston 5 has moved to the locking point. Figure 8 and Figure 9As shown, the piston 5 is at the locking point inside 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 and the first ratchet tooth 20b on the gear ring 20 mesh, the rotating part 17 stops rotating, and the rotating shaft 13 stops rotating. Since the second pawl 21 and the first tooth 12d on the second ratchet wheel 12b mesh, in this example, the second pawl 21 and the rotating disk 12 stop rotating, and the locking pin 16 on the rotating disk 12 engages with the protrusion 4a on the striking pin 4, keeping the striking pin locked. When the motor 29 stops, the piston 5 may move a distance downward from the locking point because the first pawl 19 and the first ratchet tooth 20b may not have meshed yet. Under the action of the high-pressure gas in the air chamber 3, the piston 5 moves a distance in the direction of F1 until the first pawl 19 and the first ratchet tooth 20b mesh, and then the piston 5 stops moving. If the first pawl 19 and the first ratchet 20b are engaged when the piston 5 is at the locking point, then the piston 5 will not move in the first direction F1.

[0068] like Figure 12 and Figure 13 As shown, the piston is located at the bottom dead center within the cylinder. After the nail gun fires a nail, the piston 5 moves to the bottom dead center under the action of high-pressure gas. The control system 28 controls the motor 27 to continue rotating. The motor 27 drives the rotating shaft 13 to rotate through the reduction mechanism 26. The rotating component 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 component 21a and the separating column 18 separate. The second pawl 21 rotates under the action of the second spring 23, and the teeth 12d on the second pawl 21 and the second ratchet 12b mesh. When the nail gun is working normally, the meshing position of the teeth on the second pawl 21 and the second ratchet 12b corresponds to the engagement position of the locking pin 16 on the rotating disk 12 and the protrusion 4a on the firing pin 4.

[0069] like Figure 1 Combination Figure 8 and Figure 13 As shown, the piston 5 is at its top dead center in the cylinder 2. The projection of the outer end face of the separator 21a onto the horizontal plane is the separator 21b abutting against the separator post 18. The separator 21a drives the second pawl 21 to rotate, causing the second pawl 21 and the second ratchet 12b to separate. The rotating shaft 13 and the rotating disk 12 are no longer connected to each other. The piston 5 is acted upon by the high-pressure gas in the air chamber 3, which drives the firing pin 4 to move in the first direction. The firing pin 4 drives the rotating disk 12 to rotate, and the firing pin 4 achieves nailing.

[0070] The third sensor 31 and the second sensor 30 are located between the locking point and the bottom stop point. The distance from the third position sensor 31 to the bottom stop point is less than the distance from the third position sensor 31 to the locking point. This is used to detect whether the nail gun is jammed. The distance from the third sensor 31 to the bottom stop point 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 jammed. The distance from the second position sensor 30 to the locking point is less than the distance from the second position sensor 30 to the bottom stop point. The function of the second position sensor is explained in the working principle section.

[0071] like Figure 1 As shown, the power supply unit has a housing and multiple battery cells housed within it. 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 nail gun's control system 28 can begin operation. Both the trigger switch 32 and the control switch 34 are located 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 an object, and after the trigger switch 32 is activated, the nail gun begins nailing.

[0072] The working principle of a nail gun is as follows: Figure 12 and Figure 13 As shown, when the nail gun is not powered on, piston 5 is at the bottom dead center. This ensures that the gas in the air chamber is not compressed, 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. The motor 27 drives the rotating shaft 13 to rotate through the reduction mechanism 26. Since the second pawl 21 and the gear tooth 12d are engaged, the rotating shaft 13 drives the rotating disk 12 to rotate. The locking pin 16 on the rotating disk 12 abuts against the protrusion 4a of the firing pin 4, lifting the firing pin 4. The piston 5 moves from the bottom dead center to the locking point. The outer end face of the separating part 21a is projected onto the horizontal plane as a straight line. The buffer part 21c and the separating post 18 are opposite each other. At this time, the second pawl 21 and the gear tooth 12d are still engaged. Figure 10 and Figure 11As shown, when the nail gun is turned on and both the safety switch 36 and the trigger switch 32 are on, the motor 27 drives the rotating disk 12 to rotate through the reduction mechanism 26. When the piston 5 moves from the locking point to the top dead center, the projection of the outer end face of the separating member 21a on the horizontal plane is the separation part 21b contacting the separating column 18. The separating member 21a rotates towards the center of the rotating disk 12, and the second pawl 21 rotates away from the center of the rotating disk 12 and disengages from the gear tooth 12d. The rotating disk 12 separates from the rotating shaft 13, the second spring 23 is in a compressed state, and the piston 5 moves from the top dead center in the first direction under the action of the high-pressure gas in the air chamber 3. The front end of the firing pin 4 strikes the nail to achieve nailing. During this process, the firing pin 4 drives the rotating disk 12 to rotate together but does not drive the rotating shaft 13 to rotate. Figure 6 As shown, from a top-down view, the firing pin 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 separating part 21a disengages from the separating post 18, and the second pawl 21 moves towards the center of the rotating disk 12 under the action of the second spring 23 and re-engages with the second ratchet 12b. When the piston 5 moves to the bottom dead center, the teeth on the second ratchet 12b that mesh with the second pawl 21 are also the teeth on the second ratchet 12b that mesh with the second pawl 21 when the piston 5 is at the locking point, i.e., teeth 12d. This is because when the piston 5 is at the bottom dead center, the locking pin 16 on the rotating disk 12 and the protrusion 4a on the firing pin 4 correspond to each other. When the piston 5 moves from the bottom dead center to the locking point, the teeth on the second pawl 21 and the second ratchet 12b remain engaged. In order to enable the nail gun to repeatedly nail, the teeth on the second ratchet 12b that mesh with the second pawl 21 when the piston 5 moves to the bottom dead center are also the teeth on the second ratchet 12b that mesh with the second pawl 21 when the piston 5 is at the locking point. After nailing is completed, the motor 27 continues to rotate, driving 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 firing pin 4 to move in the second direction. During this process, the piston 5 will be detected for the second time by the second position sensor. At this time, the motor 27 continues to rotate until the piston 5 moves to the locking point and stops. The motor 27 is de-energized. Since the first pawl 19 is engaged with the first ratchet tooth, and the rotating disk 12 and the rotating shaft 13 are in a coupled state, the rotating shaft 13 does not rotate in the opposite direction. The rotating shaft 13 fixes the rotating disk 12 and locks the firing pin 4, completing one nailing cycle.

[0073] During the nailing process, piston 5 was not detected by the third position sensor 31, and piston 5 had returned to the locking point. This indicates that piston 5 and firing pin 4 failed to drive the nail down due to a jam. The nail gun then flashes a red light to indicate that the jammed nail needs to be dealt with. After the jammed nail is dealt with, since piston 5 has not reached the bottom dead center, the teeth on the second pawl 21 and the second ratchet 12b are misaligned. Other teeth on the second pawl 21 and the second ratchet engage, such as tooth 12e in the figure. Piston 5 does not need to reach the top dead center. The second pawl 21 will rotate under the action of the separating column 18. The second pawl 21 and the second ratchet disengage again. Under the action of high-pressure gas, piston 5 moves in the first direction. At this time, since there is no jammed nail, piston 5 will reach the bottom dead center. After the separating part 21a and the separating column 18 disengage, the second pawl 21 and the second ratchet re-engage. At this time, the second pawl 21 re-engages tooth 12d on the second ratchet, and the nail gun resumes normal operation.

[0074] Example 2

[0075] like Figure 16 , Figure 17 , Figure 18 and Figure 19 As shown, the structures of Embodiment 2 and Embodiment 1 are basically the same, except that the structure of the lifting part is different. A first pawl 19 is connected to the rotating disk 12. The rotating disk 12 and the rotating shaft 13 are integrally formed. As an alternative, the rotating disk and the rotating shaft can also be separate and then fixed to each other. The first pawl 19 is set on the rotating disk 12 through a connecting post 48. Specifically, a hole is provided on the rotating disk 12, and the connecting post 48 is fixed in the hole. The first pawl 19 is rotatably set on the connecting post 48 and is located between the connecting post 48 and the rotating disk. A third spring 50 is provided between the first pawl 19 and the rotating disk 12. One end of the third spring 50 is set on the rotating disk 12, and the other end of the third spring 50 is set on the first pawl 19. A washer 49 is provided between the first pawl 19 and the rotating disk 12.

[0076] The rotating disk 12 is provided with locking pins 16. The locking pins 16 are arranged in a ring at intervals on the rotating disk 12. The locking pins 16 are discontinuous on the rotating disk 12. The discontinuity of the locking pins 16 means that there are no continuous locking pins between locking pin one 16a and locking pin two 16b. The firing pin 4 is provided with protrusions 4a corresponding to the locking pins 16. The protrusions 4a engage with the locking pins 16. The locking pins 16 are cylindrical. The distance between the protrusions 4a is greater than the diameter of the locking pins 16.

[0077] The nailing working principle of Embodiment 2 is basically the same as that of Embodiment 1. The difference is that when the nail gun moves to its highest point, the firing pin 4 does not rotate with the rotating disk as it moves in the first direction. When the piston 5 moves to the locking point, the motor is de-energized, and the first ratchet 19 and the first ratchet tooth 20b on the gear ring 20 engage to restrict the rotation of the rotating disk 12. When the nail gun is firing, the motor continues to rotate, and the piston 5 moves to the upper dead point. At this time, the locking pin 16a no longer locks the protrusion 4a1, and the piston 5 moves forward under the action of high-pressure gas. The firing pin 4 moves with the piston 5 to achieve nailing. After the nail is fired, the piston 5 moves to the lower dead point, and the motor continues to rotate until the locking pin 16b and the protrusion 4a2 engage, lifting the firing pin 4 in the second direction until the piston 5 moves to the locking point, at which point the motor stops. In this embodiment, a position sensor can be set to detect when the piston 5 moves to the lower dead point. When the piston moves to the lower dead point, the motor starts to rotate again.

[0078] Example 3

[0079] This embodiment is basically the same as the first embodiment in structure. The first pawl 19 is set on the rotating part 17, and the rotating part 17 is fixedly connected to the rotating shaft. The difference is that the rotating disk 12 and the rotating shaft 13 are fixed or integrally formed. The locking pin on the rotating disk 12 is the same as the structure of the second embodiment. The locking pin 16 is arranged in a ring at intervals on the rotating disk 12. The locking pin 16 is not continuous on the rotating disk 12. The nailing working principle of this embodiment is also basically the same as that of the second embodiment. When the nail gun moves to the highest point, the firing pin 4 does not rotate the rotating disk when it moves in the first direction. When the piston 5 moves to the locking point, the motor is de-energized, and the first pawl 19 and the first ratchet tooth 20b on the gear ring 20 mesh to restrict the rotation of the rotating disk 12. When the nail gun nails, the motor continues to rotate, and the piston 5 moves to the upper dead point. At this time, the locking pin 16a no longer locks the protrusion 4a1. The piston 5 moves forward under the action of high pressure gas, and the firing pin 4 moves with the piston 5 to realize nailing. After the nail is fired, piston 5 moves to the lower dead center, and the motor continues to rotate until the locking pin 16b and protrusion 4a2 engage, lifting the firing pin 4 in the second direction until piston 5 moves to the locking point, at which point the motor stops. In this embodiment, a position sensor can be set to detect when piston 5 moves to the lower dead center; the motor will then start rotating only when the piston reaches the lower dead center.

[0080] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0081] Although this document frequently uses terms such as 1. impact part; 2. cylinder; 3. air chamber; 4. firing pin; 4a. protrusion; 4a1. protrusion one; 4a2. protrusion two; 4b. groove; 4c. connector; 4d. bulge; 4e. fixing hole two; 4f. guide bar; and 5. piston, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation would contradict the spirit of this utility model.

Claims

1. A pneumatic nail gun, comprising a nail ejection section (9) and an impact section (1) for ejecting nails from the nail ejection section (9) along a first direction, the impact section (1) comprising a firing pin (4) reciprocating in the first direction and a second direction opposite to the first direction, the nail gun further comprising a lifting section (11) for moving the firing pin (4) in the second direction, the lifting section (11) comprising a rotating shaft (13) and a rotating disk (12) for moving the firing pin, the rotating shaft (13) and the rotating disk (12) being connected and both disposed within a mounting cylinder (8b), characterized in that, The rotating shaft (13) or rotating disk (12) is connected to a first pawl (19). The mounting cylinder (8b) is also provided with a gear ring (20) that engages with the first pawl (19). The gear ring (20) has a first ratchet tooth (20b) on its inner side. The first pawl (19) is located inside the gear ring (20) and engages with the first ratchet tooth (20b) to restrict the rotation of the rotating disk (12).

2. The pneumatic nail gun according to claim 1, characterized in that, The mounting cylinder (8b) is mounted on the mounting base (8), and a boss (8d) is provided on the inner side wall of the mounting cylinder (8b). The gear ring (20) is mounted on the boss (8d), and a cover plate (15) for fixing the gear ring is fixedly connected to the mounting cylinder (8b).

3. A pneumatic nail gun according to claim 2, characterized in that, The gear ring (20) is also provided with a limiting block (20a), and the mounting base (8) also includes a limiting cavity (8c), with the limiting block (20a) located inside the limiting cavity (8c).

4. A pneumatic nail gun according to claim 3, characterized in that, When the first pawl (19) is connected to the rotating shaft (13), a rotating component (17) is fixed on the rotating shaft (13) and located above the rotating disk (12). The first pawl (19) is rotatably mounted on the rotating component (17). The first pawl (19) is located between the rotating component (17) and the rotating disk (12). The first pawl (19) is mounted on the rotating component (17) through a connecting post (47).

5. A pneumatic nail gun according to claim 4, characterized in that, A first spring (22) is provided between the first pawl (19) and the rotating member (17). One end of the first spring (22) is provided on the rotating member (17), and the other end of the first spring (22) is provided on the first pawl (19). A washer (44) is provided between the first pawl (19) and the rotating member (17).

6. A pneumatic nail gun according to claim 5, characterized in that, The rotating shaft (13) and the rotating disk (12) are movably connected. The rotating disk (12) and the rotating shaft (13) are separated or joined by a lifting assembly. When the striking pin (4) moves toward the first direction, the striking pin (4) drives the rotating disk (12) to rotate.

7. A pneumatic nail gun according to claim 6, characterized in that, The lifting assembly includes a second ratchet (12b) disposed on a rotating disk (12) and a second pawl (21) disposed on a rotating member (17). The second ratchet (12b) is located in the middle of the rotating disk (12) and below the rotating member (17). The second pawl (21) meshes with the second ratchet (12b). The second pawl (21) is also provided with a separating member (21a) for separating the second pawl (21) and the second ratchet (12b). The limiting cavity (8c) is provided with a separating post (18) that cooperates with the separating member (21a). A part of the separating post (18) is located inside the mounting cylinder (8b). When the separating member (21a) abuts against the separating post (18), the second pawl (21) and the second ratchet (12b) separate.

8. A pneumatic nail gun according to claim 7, characterized in that, The rotating component (17) is long and narrow. The first pawl (19) and the second pawl (21) are arranged opposite to each other. The first ratchet tooth (20b) is a one-way tooth. The center of the tooth of the second ratchet (12b) is along the center of the rotating disk (12) and faces outward.

9. A pneumatic nail gun according to claim 8, characterized in that, The rotating member (17) is provided with a fixed post (17a), the second pawl (21) is rotatably mounted on the fixed post (17a), and 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 on the inner side of the separating member (21a).

10. A pneumatic nail gun according to claim 8, characterized in that, The second ratchet (12b) is located below the rotating member (17). The nail ejector (9) includes a guide plate (10). The guide plate (10) is provided with a mounting post (10a) located in the limiting cavity (8c). The separating post (18) is sleeved on the mounting post (10a) and the separating post (18) is located below the limiting block (20a). The mounting post (10a) is also sleeved with a limiting post (42). The limiting post (42) is located between the separating post (18) and the limiting block (20a).

11. A pneumatic nail gun according to claim 10, characterized in that, The rotating disk (12) is provided with locking pins (16), the locking pins (16) are continuously spaced and arranged in a ring on the rotating disk (12), the firing pin (4) is provided with protrusions (4a) corresponding to the locking pins (16), the protrusions (4a) engage with the locking pins (16), the locking pins (16) are cylindrical, and the distance between adjacent protrusions (4a) is greater than the diameter of the locking pins (16).

12. A pneumatic nail gun according to claim 5, characterized in that, The rotating disk (12) and the rotating shaft (13) are fixed together or integrally formed. The rotating disk (12) is provided with a locking pin (16). The locking pins (16) are arranged in a ring at intervals on the rotating disk (12). The locking pins (16) are not continuous on the rotating disk (12). The firing pin (4) is provided with a protrusion (4a) corresponding to the locking pin (16). The protrusion (4a) engages with the locking pin (16). The locking pin (16) is cylindrical. The distance between adjacent protrusions (4a) is greater than the diameter of the locking pin (16).

13. A pneumatic nail gun according to claim 1, 2, or 3, characterized in that, When the first pawl (19) is connected to the rotating disk (12), the rotating disk (12) and the rotating shaft (13) are fixed or integrally formed. The first pawl (19) is set on the rotating disk (12) through the second connecting post (48). A third spring (50) is provided between the first pawl (19) and the rotating disk (12). One end of the third spring (50) is set on the rotating disk (12), and the other end of the third spring (50) is set on the first pawl (19). A second washer (49) is provided between the first pawl (19) and the rotating disk (12).

14. A pneumatic nail gun according to claim 13, characterized in that, The rotating disk (12) is provided with locking pins (16), which are arranged in a ring at intervals on the rotating disk (12). The locking pins (16) are not continuous on the rotating disk (12). The firing pin (4) is provided with protrusions (4a) corresponding to the locking pins (16). The protrusions (4a) engage with the locking pins (16). The locking pins (16) are cylindrical, and the distance between adjacent protrusions (4a) is greater than the diameter of the locking pins (16).

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