Pneumatic nailing gun

Abstract

The invention 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] The present invention relates to the technical field of nail guns, in particular to a nail gun, especially a pneumatic nail gun. Background Art

[0002] A nail gun is a tool that drives the fasteners inside it into an object, including 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 the existing nail gun, the impact part includes a firing pin and a piston. The firing pin is arranged in the piston. The movement of the piston is generally driven by a rack and a gear, that is, a rack is arranged on the firing pin, and a gear is arranged in the lifting part. The driving motor in the lifting part drives the gear to rotate. Since the rack and the gear are meshed with each other, the rack is driven to move laterally during the rotation of the gear to realize the energy storage of the compressed gas. After the gas compression energy storage is completed, the firing pin remains in a locked state, and the locking piece is clamped on the firing pin. When the nail gun needs to nail, the locking piece is controlled to disengage from the firing pin. Since the piston is subjected to the action of the high-pressure gas, the locking piece is subjected to a large pressure when it disengages from the firing pin, which is easy to wear the locking piece and the firing pin. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems in the prior art and to provide a pneumatic nail gun. The technical problem to be solved by the present invention is: how to reduce the wear of the locking member and the firing pin.

[0005] The purpose of the present invention can be achieved through the following technical solutions to optimize the steps of a nail gun: a pneumatic nail gun, comprising a nail-discharging part and an impact part for driving the nail in the nail-discharging part out of the nail gun along a first direction, the impact part comprising a firing pin, the firing pin reciprocating in a first direction and a second direction opposite to the first direction, the nail gun also comprising a lifting part for moving the firing pin in the second direction, the lifting part comprising a rotating shaft and a rotating disk that drives the firing pin to move, the rotating shaft and the rotating disk are connected and both are arranged in an installation tube, characterized in that a rotating part is provided on the rotating shaft or the rotating disk, a first pawl is rotatably provided on the rotating part, a gear ring cooperating with the first pawl is also provided in the installation tube, a first ratchet is provided on the inner side of the gear ring, the first pawl is located on the inner side of the gear ring and meshes with the first ratchet to limit the rotation of the rotating disk.

[0006] In this solution, when a rotating part is provided on the rotating shaft, the rotation of the rotating shaft and the movement of the striker are together, and a first pawl is provided on the rotating part. 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 combined, and the motor is powered off, and the rotating disk can also remain locked, and the striker also remains fixed, thereby realizing the striker locking function. When nailing is required, the rotating disk and the rotating shaft are separated, and the striker moves in the first direction under the action of compressed gas to realize nailing, and the rotating disk rotates in the opposite direction under the action of the striker.

[0007] Through the above structure, the lifting, locking, unlocking and nailing of the firing pin can be achieved without providing an additional locking structure on the firing pin, thereby reducing the wear of the firing pin, and the rotating disk, rotating shaft, and the first ratchet pawl and gear ring for locking the firing pin are all arranged in the mounting tube, saving the installation space of the nail gun and making the nail gun structure more compact.

[0008] In the above-mentioned pneumatic nailing gun, the nailing gun includes a mounting seat, the mounting seat includes a mounting tube and a limiting cavity, a boss is provided on the inner side wall of the mounting tube, the gear ring is arranged on the boss, and the mounting tube is fixedly connected with a cover plate for fixing the gear ring. The cover plate and the boss work together to fix the gear ring in the mounting tube.

[0009] In the above-mentioned pneumatic nailing gun, the gear ring is also provided with a limit block, and the limit block is located in the limit cavity. The boss and the limit cavity make the installation and fixation of the gear ring more convenient.

[0010] In the above-mentioned pneumatic nailing gun, when the first pawl is connected to the rotating shaft, the rotating member is fixed on the rotating shaft and located above the rotating disk, the rotating shaft is fixed with the rotating member and located above the rotating disk, the rotating member is rotatably provided with the first pawl, the first pawl is located between the rotating member and the rotating disk, and the first pawl is provided on the rotating member through a connecting column 1. Providing the first pawl between the rotating member and the rotating disk can save installation space and make the disassembly and assembly of the first pawl more convenient.

[0011] In the above-mentioned pneumatic nailing gun, a first spring is provided between the first pawl and the rotating member, one end of the first spring is provided on the rotating member, the other end of the first spring is provided on the first pawl, and a washer 1 is provided between the first pawl and the rotating member. The first spring limits the rotation of the first pawl, so that the first pawl and the first ratchet on the gear ring are kept in meshing, thereby improving the locking effect, and the washer 1 reduces the wear between the first pawl and the rotating frame.

[0012] In the above-mentioned pneumatic nailing gun, the rotating shaft and the rotating disk are movably connected, and the rotating disk and the rotating shaft are connected by a lifting assembly to achieve separation or combination. When the firing pin moves toward the first direction, the firing pin drives the rotating disk to rotate. The rotating disk is movably arranged on the rotating shaft, and the rotating shaft and the rotating disk are separated and combined by the lifting assembly. When the rotating shaft and the rotating disk are combined, 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 of the nailing gun.

[0013] In the above-mentioned pneumatic nail gun, the lifting assembly includes a second ratchet wheel arranged on the rotating disk and a second pawl arranged on the rotating member, the second ratchet wheel is located in the middle of the rotating disk and below the rotating member, the second pawl and the second ratchet wheel are meshed, the second pawl is also provided with a separation piece for separating the second pawl and the second ratchet wheel, the limiting cavity is provided with a separation column for cooperating with the separation piece, a part of the separation column is located in the installation cylinder, and when the separation piece abuts against the separation column, the second pawl and the second ratchet wheel are separated. The first pawl and the second pawl are arranged on the rotating member at the same time, which saves installation space.

[0014] In the above-mentioned pneumatic nailing gun, the rotating member is in the shape of a long strip, the first pawl and the second pawl are arranged opposite to each other, the first ratchet is a one-way tooth, and the center of the second ratchet wheel's teeth faces outward along the center of the rotating disk. The first ratchet is a one-way tooth to prevent the reverse rotation of the rotating shaft, and the second ratchet wheel's teeth face outward along the center of the rotating disk to facilitate the separation of the second pawl and the second ratchet wheel when the nailing gun is nailing, thereby reducing the wear between the second pawl and the second ratchet wheel.

[0015] In the above-mentioned pneumatic nail gun, a fixed column is provided on the rotating member, the second pawl is rotatably set on the fixed column, a second spring is provided between the second pawl and the rotating member, one end of the second spring is set on the rotating member, and the other end of the second spring is set on the inner side of the separation member.

[0016] In the above-mentioned pneumatic nail gun, the second ratchet is located below the rotating member, the nail-extracting part includes a guide plate, the guide plate is provided with a mounting column located in the limiting cavity, the separation column is sleeved on the mounting column and the separation column is located below the limiting block, the mounting column is also sleeved with a limiting column, and the limiting column is located between the separation column and the limiting block. The mounting column, the separation column and the limiting block are all arranged in the limiting cavity to save the installation space of the nail gun, and the limiting block and the limiting column work together to limit the separation column to prevent the separation column from falling off the mounting column.

[0017] In the above-mentioned pneumatic nail gun, the bayonet pins are arranged continuously at intervals and in a ring shape on the rotating disk, the firing pin is provided with protrusions corresponding to the bayonet pins, the protrusions are engaged with the bayonet pins, the bayonet pins are cylindrical, and the distance between adjacent protrusions is greater than the diameter of the bayonet pin.

[0018] In the above-mentioned pneumatic nail gun, the rotating disk and the rotating shaft are fixed or integrally formed, the rotating disk is provided with a bayonet, the bayonet is arranged on the rotating disk in a ring-shaped interval, the bayonet is discontinuous on the rotating disk, the firing pin is provided with a protrusion corresponding to the bayonet, the protrusion is engaged with the bayonet, the bayonet is cylindrical, and the distance between adjacent protrusions is greater than the diameter of the bayonet.

[0019] In the above-mentioned pneumatic nail gun, when the first pawl is connected to the rotating disk, the rotating disk and the rotating shaft are fixed or integrally formed, the first pawl is arranged on the rotating disk through a second connecting column, a third spring is arranged between the first pawl and the rotating disk, one end of the third spring is arranged on the rotating disk, and the other end of the third spring is arranged on the first pawl, and a second washer is arranged 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 bayonet, the rotating disk and the rotating shaft move together, and a lifting component and a first pawl are set on the rotating shaft. A gear ring is set on the mounting cylinder, and the first pawl is engaged with the first ratchet on the gear ring to achieve lifting, locking and unlocking of the striker. There is no need to set an additional locking structure on the striker, which reduces the wear of the striker.

[0022] 2. In this solution, the rotating disk, the rotating shaft, and the first ratchet pawl and the gear ring for locking the striker are all arranged in the installation tube, which saves the installation space of the nail gun and makes the nail gun structure more compact.

[0023] 3. In this solution, the installation column, the separation column and the limit block are all arranged in the limit cavity, which can save the installation space of the nail gun. The limit block can also limit the separation column to prevent the separation column from falling off the installation column. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the pneumatic nail gun of the present invention;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of the pneumatic nail gun of the present invention;

[0026] Figure 3 It is a schematic cross-sectional structure diagram of the pneumatic nail gun of the present invention;

[0027] Figure 4 It is a schematic cross-sectional structure diagram of the pneumatic nail gun of the present invention;

[0028] Figure 5 It is a three-dimensional structural schematic diagram of the pneumatic nail gun of the present invention;

[0029] Figure 6 It is a schematic diagram of the explosion structure of the lifting part of the pneumatic nail gun in the present invention;

[0030] Figure 7 It is a schematic structural diagram of a firing pin and a piston of a pneumatic nail gun of the present invention;

[0031] Figure 8 It is a schematic cross-sectional structure diagram of the pneumatic nail gun of the present invention;

[0032] Fig. 9 It is a schematic cross-sectional structure diagram of the pneumatic nail gun of the present invention;

[0033] Fig.10 It is a schematic cross-sectional structure diagram of the pneumatic nail gun of the present invention;

[0034] Fig.11 It is a schematic cross-sectional structure diagram of the pneumatic nail gun of the present invention;

[0035] Fig.12 It is a schematic cross-sectional structure diagram of the pneumatic nail gun of the present invention;

[0036] Fig.13 It is a schematic cross-sectional structure diagram of the pneumatic nail gun of the present invention;

[0037] Fig.14 It is a schematic cross-sectional structure diagram of the pneumatic nail gun of the present invention;

[0038] Fig.15 It is a schematic structural diagram of the second pawl of the pneumatic nail gun of the present invention;

[0039] Fig.16 It is a three-dimensional structural schematic diagram of a second embodiment of a pneumatic nail gun in the present invention;

[0040] Fig.17 It is a three-dimensional structural schematic diagram of a second embodiment of a pneumatic nail gun in the present invention;

[0041] Fig.18 It is a cross-sectional structural schematic diagram of a second embodiment of a pneumatic nail gun in the present invention;

[0042] Fig.19 It is a cross-sectional structural schematic diagram of a second embodiment of a pneumatic nailing gun in the present invention.

[0043] In the figure, 1, striking part; 2, cylinder; 3, air chamber; 4, striker; 4a, protrusion; 4a1, protrusion 1; 4a2, protrusion 2; 4b, groove; 4c, connector; 4d, protrusion; 4e, fixing hole 2; 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, nailing part ; 10, guide plate; 10a, mounting column; 10b, guide block; 11, lifting part; 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; 15a, clamping plate; 16, clamping pin; 16a, clamping pin 1; 16b, clamping pin 2; 17, rotating member; 17a, fixed column; 18, Separation column; 19, first pawl; 20, gear ring; 20a, limit block; 20b, first ratchet; 21, second pawl; 21a, separation member; 21b, separation part; 21c, buffer part; 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. Plug slot; 37b. Limit slot; 37c. Fixing hole 1; 38. Fixing pin; 39. Guide slot 1; 40. Shell; 41. Handle; 42. Limit column; 43. Support column; 44. Washer 1; 45. Limit plate; 46. Guide slot 2; 47. Connecting column 1; 48. Connecting column 2; 49. Washer 2; 50. Third spring. DETAILED DESCRIPTION

[0044] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0045] Embodiment 1

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

[0047] The nail box 33 is arranged below the nail outlet portion 9. The nails are loaded in the nail box 33. The nails in the nail box 33 will enter the nail outlet portion 9. The nails in the nail outlet portion 9 will be replenished and enter the nail outlet portion 9 after being driven out by the nail pushing structure.

[0048] The nail gun includes a motor 27, the output shaft of the motor 27 rotates in one direction when the motor 27 is powered on, a speed reduction mechanism 26 is connected to the motor 27, and the output shaft of the speed reduction mechanism 26 is connected to the rotating shaft 13 in the lifting part 11 to drive the rotating shaft 13 to rotate. A battery is provided under the handle 41, and the battery is used to provide power to the motor 27 and a control system 28.

[0049] The impact part 1 in the nail gun is a structure for driving nails into an object to be fastened. The impact part 1 of the nail gun includes a cylinder 2, which is in a hollow cylindrical shape. The cylinder 2 includes a cylinder wall located on the inner side, and a cylinder end cover 7 is provided at one end of the cylinder 2. The cylinder end cover 7 is used to block one end of the cylinder 2. Under the action of the cylinder end cover 7 and the piston 5, an air chamber 3 for storing compressed fluid is formed in the cylinder 2. In addition to air, the air chamber 3 can also be filled with inert gas. As an example, the inert gas includes nitrogen and rare gas.

[0050] like Figure 3 As shown, a movable piston 5 is provided on the inner wall of the cylinder 2. The piston 5 is cylindrical. An annular piston seal 5b, an oil storage tank and a piston guide 5a are provided on the side wall of the piston 5. The piston guide 5a is located on both sides of the piston seal 5b. The oil storage tank is used to store grease and is located between the piston seal 5b and the piston guide 5a. The oil storage tank is not shown in the figure. Among them, the piston guide 5a is made of plastic, which is used for the smooth movement of the piston in the cylinder 2 to avoid deviation and reduce the friction between the piston 5 and the inner wall of the cylinder 2. The piston 5 reciprocates in the cylinder 2 along the straight line A. The straight line A is an imaginary straight line showing the center line of the cylinder 2. The piston seal 5b contacts the inner wall of the cylinder 2 so that the piston 5 and the inner wall of the cylinder 2 form a sealing surface, so that the compressed gas in the air chamber 3 is not easy to leak. A magnetic steel is provided in the piston 5. The magnetic steel can be detected by the position sensor and is used to determine the position of the piston 5 in the cylinder 2.

[0051] like Figure 3 , Figure 5 and Figure 7 As shown, the striking part 1 also includes a firing pin 4 for pushing the nail to move, and 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, wherein when the firing pin 4 moves in the first direction F1, the nail gun realizes the nailing function, and when the firing pin 4 moves in the second direction F2, the firing pin 4 is reset, the gas in the air 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 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.

[0053] like Figure 7 As shown, the striker 4 is in the shape of a long strip, and the front section of the striker 4 is a cylindrical striker nail. The specific fixing method of the striker 4 and the piston 5 is that a flat plug-in 4c is provided at one end of the striker 4, and a connecting member 37 is fixedly connected to the piston 5 by threads, and the plug-in 4c and the connecting member 37 are connected by a fixing member 38. In this embodiment, the fixing member 38 is a fixing pin. As an alternative, the fixing frame 38 can also 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.

[0054] The upper and lower sides of the striker 4 are also provided with arc-shaped guide strips 4f. In this embodiment, the guide strip 4f and the protrusion 4d are integrated. The nail-out part 9 includes a guide plate 10 and a nail-out plate 35. A limiting plate 45 is also provided under the guide plate 10. The limiting 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.

[0055] A plurality of protrusions 4a for lifting the striker 4 are provided on one side of the striker 4. The protrusions 4a extend outwardly to one side of the striker 4 along the width direction of the striker 4. In this embodiment, the number of the protrusions 4a is 9. There is a spacing between two adjacent protrusions 4a and a groove 4b is formed. A second guide groove 46 is formed between the protrusion 4a and the body of the striker 4. A guide block 10b that can slide in the second guide groove 46 is also provided on the guide plate 10.

[0056] like Figure 1 , Figure 4 and Figure 7 As shown, the other end of the cylinder 2 is fixed on the mounting seat 8, and an exhaust hole is provided on the mounting seat 8, and the striker 4 can pass through the exhaust hole. 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 2.

[0057] like Figure 4 Combination Fig.14As shown, a mounting plate 8a is provided at the front end of the mounting seat 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, and the nail magazine 33 is fixed on the nail output plate 35. In the mounting seat 8, a mounting cylinder 8b is also provided at the side of the mounting plate 8a, and a lifting portion 11 for driving the striker 4 to move is provided on the mounting cylinder 8b.

[0058] like Figure 3 Combination Figure 4 and Figure 6 As shown, the lifting part 11 includes a rotating shaft 13, and two bearings are arranged in the vertical direction in the mounting cylinder 8b, namely, bearing 1 14a and bearing 2 14b. The bearing 2 14b located at the bottom is installed in the 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 arranged in the cover plate 15. The bearing 1 14a located at the top is located in the mounting groove in the cover plate 15. The two ends of the rotating shaft 13 are arranged on two bearings and rotate around the axis B thereof. A speed reduction mechanism 26 is connected to the lower end of the rotating shaft 13, and a hole in the shape of a racetrack is arranged in the speed reduction mechanism 26. The lower part of the rotating shaft 13 corresponds to the hole in the shape of the racetrack and is inserted in the hole. The speed 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 arranged on the rotating shaft 13, and the rotating disk 12 has a plurality of mounting holes 12a arranged along the rotating direction, and the mounting holes 12a are annular and continuously spaced on the rotating disk 12, and a bayonet 16 is arranged in each mounting hole 12a, and the bayonet 16 is annular and continuously spaced on the rotating disk 12. The bayonet 16 is cylindrical, and a limit plate is provided below the bayonet on the rotating disk 12, and the limit plate prevents the bayonet 16 from coming out of the mounting hole 12a. The bayonet 16 can rotate along the center of 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, and 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 disposed 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 .

[0060] like Fig. 9 As shown, 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, the first bearing 24 and the rotating shaft 13 are axially fixed, and 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, and the rotating disk 12 is also provided with a limiting member for limiting the first bearing 24 in the rotating disk 12, and the limiting member is a clamp, and the clamp is embedded on 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, and 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 member 17 is fixed on the rotating shaft 13 by threads, and the rotating member 17 is in the shape of a plate. A first pawl 19 is rotatably arranged on the rotating member 17. The first pawl 19 is arranged on the rotating member 17 through a connecting column 47. A first spring 22 is arranged between the first pawl 19 and the rotating member 17. One end of the first spring 22 is arranged on the rotating member 17, and the other end of the first spring 22 is arranged on the first pawl 19. A washer 44 is arranged between the first pawl 19 and the rotating member 17. A boss 8d is arranged on the inner side wall of the installation cylinder 8b, and a gear ring 20 matching with the first pawl 19 is arranged on the boss 8d. A clamping plate 15a embedded in the installation cylinder is arranged below the cover plate 15. The clamping plate 15a and the boss 8d work together to restrict the gear ring 20 in the installation cylinder 8b to prevent the gear ring from moving in the vertical direction in the installation cylinder. The inner side of the gear ring 20 is provided with a first ratchet 20b, and the first pawl 19 is located inside the gear ring 20 and meshes with the first ratchet 20b to limit the rotation of the rotating shaft 13. A limiting cavity 8c is also provided on the mounting seat 8, and a limiting block 20a is provided on the gear ring 20, and the limiting block 20a is located in the limiting cavity 8c.

[0063] The lifting assembly includes a second ratchet 12b disposed on the rotating disk 12 and a second pawl 21 disposed on the 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 is meshed with the gear teeth of the second ratchet 12b. In this embodiment, the meshing of the second pawl 21 and the gear teeth 12d is used as an example. The second pawl 21 is also provided with a separation member 21a for separating the second pawl 21 from the second ratchet 12b. A separation column 18 for cooperating with the separation member 21a is provided in the limiting cavity 8c. A part of the separation column 18 is located in the mounting cylinder 8b. When the separation member 21a abuts against the separation column 18, the second pawl 21 is separated from the second ratchet 12b.

[0064] 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, and the gear teeth of the second ratchet wheel are oriented outward along the center of the rotating disk 12. A fixed column 17a is arranged on the rotating member 17, and the second pawl 21 is rotatably arranged on the fixed column 17a. A second spring 23 is arranged between the second pawl 21 and the rotating member 17, and one end of the second spring 23 is arranged on the rotating member 17, and the other end of the second spring 23 is arranged on the inner side of the separating member 21a. A mounting column 10a located in the limiting cavity 8c is arranged on the guide plate 10, and the separating column 18 is sleeved on the mounting column 10a and the separating column 18 is located below the limiting block 20a. A limiting column 42 is also sleeved on the mounting column 10a, and the limiting column 42 is located between the separating column 18 and the limiting block 20a. The limiting column abuts on the separating column 18, and the limiting block 20a and the separating column 18 jointly limit the separating column 18 to prevent the separating column from moving upward.

[0065] The outer end surface 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 of an arc. When the striker 4 moves in the second direction F2, the second pawl 21 and the second ratchet 12b are meshed, and the separating member 21a and the separating column 18 are not in contact. When the striker 4 moves in the first direction, the separating portion 21b of the separating member 21a contacts the separating column 18, the pawl rotates around the connecting axis, and the second pawl 21 is disengaged from the second ratchet 12b.

[0066] The striker 4 moves with the piston 5, and the piston 5 has three positions in the cylinder 2, including the top dead center, the bottom dead center and the 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 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 Fig. 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, the control system 28 controls the motor 27 to stop, the first pawl 19 is meshed with the first ratchet 20b on the ring gear 20, the rotating member 17 stops rotating, the rotating shaft 13 stops rotating, and the second pawl 21 is meshed with the gear tooth 12d on the second ratchet 12b. In this example, the second pawl 21 and the rotating disk 12 stop rotating, the latch 16 on the rotating disk 12 is engaged with the protrusion 4a on the striker 4, and the striker remains locked. When the motor 29 stops, the piston 5 may move down a distance from the locking point, because the first pawl 19 and the first ratchet 20b may not be meshed yet. The piston 5 moves a distance in the F1 direction under the action of the high-pressure gas in the air chamber 3 until the first pawl 19 and the first ratchet 20b are meshed, 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 .

[0068] like Fig.12 and Fig.13 As shown, the piston is located at the bottom dead center in the cylinder. After the nail gun nails, the piston 5 moves to the bottom dead center under the action of the high-pressure gas, and the control system 28 controls the motor 27 to continue to rotate. The motor 27 drives the rotating shaft 13 to rotate through the speed 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 separation member 21a and the separation column 18 are separated, and the second pawl 21 rotates under the action of the second spring 23, and the second pawl 21 is meshed with the gear teeth 12d on the second ratchet 12b. When the nail gun is working normally, 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.

[0069] like Figure 1 Combination Figure 8 and Fig.13 As shown, it is the top dead center of the piston 5 in the cylinder 2, and the projection of the outer end surface of the separator 21a on the horizontal plane is the separation part 21b against the separation 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.

[0070] 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 is smaller than the distance from the third position sensor 31 to the locking point. The distance from the third position sensor 31 to the bottom dead center can be set to the length of half a nail. If the third position sensor 31 does not detect the piston 5 during a nailing process, it means that the nail gun is stuck. The distance from the second position sensor 30 to the locking point is smaller than the distance from the second position sensor 30 to the bottom dead center. The role of the second position sensor is introduced in the working principle.

[0071] like Figure 1 As shown, the power supply unit has a storage shell and a plurality of battery cells stored in the storage shell. The nail gun also includes a safety switch 36, a control switch 34 and a trigger switch 32. After 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 arranged on the handle. The trigger switch 32 detects the presence or absence of an 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 against the object, and after the trigger switch 32 is turned on, the nail gun realizes nailing.

[0072] The working principle of the nail gun is as follows: Fig.12 and Fig.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 Fig. 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 speed reduction mechanism 26. Since the second ratchet 21 is meshed 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 separation member 21a is projected on the horizontal plane as a straight buffer portion 21c and the separation column 18. At this time, the second ratchet 21 is still meshed with the gear tooth 12d; as shown in FIG. Fig.10 and Fig.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 rotating 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 projection of the outer end surface of the separation member 21a on the horizontal plane is that the separation portion 21b contacts the separation column 18, and the separation member 21a rotates toward the center of the rotating disk 12. The second pawl 21 rotates away from the center of the rotating disk 12 and disengages from the gear 12d. The rotating 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 strikes the nail to achieve nailing. In this process, the striker 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 view, the striker 4 drives the rotating disk 12 to rotate in a clockwise direction. In 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 meshes with the second pawl 21 when the piston 5 moves to the lower dead center are also the gear teeth on the second ratchet 12b that meshes with the second pawl 21 when the piston 5 is at the locking point, that is, gear teeth 12d. Because when the piston 5 is at the lower dead center, the latch 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 lower 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 meshes with the second pawl 21 when the piston 5 moves to the lower dead center are also the gear teeth on the second ratchet 12b that meshes 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, and 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 can only stop when 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.

[0073] 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 means that the piston 5 and the firing pin 4 are not 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 lower dead center, the gear teeth on the second pawl 21 and the second ratchet 12b are misaligned, and the second pawl 21 and other gear teeth on the second ratchet are meshed, such as the gear tooth 12e in the figure. The piston 5 does not need to reach the upper dead center, and the second pawl 21 will rotate under the action of the separation column 18. The second pawl 21 and the second ratchet are disengaged again, and the piston 5 moves in the first direction under the action of the high-pressure gas. At this time, since there is no stuck nail, the piston 5 will reach the lower 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 gear tooth 12d on the second ratchet, and the nail gun resumes normal operation.

[0074] Embodiment 2

[0075] like Fig.16 , Fig.17 , Fig.18 and Fig.19 As shown, the structures of the second embodiment and the first embodiment are basically the same, except that the structures of the lifting parts are different. The first pawl 19 is connected to the rotating disk 12, and 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 separated and then fixed to each other. The first pawl 19 is set on the rotating disk 12 through the second connecting column 48. Specifically, a hole is provided on the rotating disk 12, and the second connecting column 48 is fixed in the hole. The first pawl 19 is rotatably set on the second connecting column 48 and is located between the second connecting column 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 provided on the rotating disk 12, and the other end of the third spring 50 is provided on the first pawl 19, and a washer 49 is provided between the first pawl 19 and the rotating disk 12.

[0076] A bayonet 16 is provided on the rotating disk 12, and the bayonet 16 is arranged at annular intervals on the rotating disk 12. The bayonet 16 is discontinuous on the rotating disk 12. The discontinuous bayonet 16 means that the bayonet 16 is not continuously provided between the bayonet 16a and the bayonet 2 16b. A protrusion 4a corresponding to the bayonet 16 is provided on the striker 4, and the protrusion 4a is engaged with the bayonet 16. The bayonet 16 is cylindrical, and the distance between the protrusions 4a is greater than the diameter of the bayonet 16.

[0077] The nailing working principle of the second embodiment is also basically the same as that of the first embodiment, except that when the nail gun moves to the highest point, the striker 4 does not rotate with the rotating disk when it moves in the first direction. When the piston 5 moves to the locking point, the motor is powered off, and the first ratchet 19 and the first ratchet 20b on the ring gear 20 engage to limit the rotation of the rotating disk 12. When the nail gun is nailing, the motor continues to rotate, the piston 5 moves to the upper dead center, at which time the bayonet 16a no longer clamps the protrusion 14a1, the piston 5 moves forward under the action of the high-pressure gas, and the striker 4 moves with the piston 5 to achieve nailing. After the nail is driven out, the piston 5 moves to the lower dead center, and the motor continues to rotate until the bayonet 16b and the protrusion 24a2 engage, lifting the striker 4 in the second direction until the piston 5 moves to the locking point and the motor stops. In this embodiment, a position sensor for detecting that the piston 5 moves to the lower dead center can be set, and the motor starts to rotate again when the piston moves to the lower dead center.

[0078] Embodiment 3

[0079] The structure of this embodiment is basically the same as that of the first embodiment. The first pawl 19 is arranged on the rotating member 17, and the rotating member 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 bayonet on the rotating disk 12 has the same structure as that of the second embodiment. The bayonet 16 is arranged on the rotating disk 12 in an annular interval. The bayonet 16 is discontinuous 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 striker 4 does not rotate with the rotating disk when moving in the first direction. When the piston 5 moves to the locking point, the motor is powered off, and the first pawl 19 and the first ratchet 20b on the gear ring 20 engage to limit the rotation of the rotating disk 12. When the nail gun is nailing, the motor continues to rotate, and the piston 5 moves to the top dead center. At this time, the bayonet 16a no longer clamps the protrusion 14a1, and the piston 5 moves forward under the action of the high-pressure gas, and the striker 4 moves with the piston 5 to achieve nailing. After the nail is driven out, the piston 5 moves to the bottom dead center, and the motor continues to rotate until the second bayonet pin 16b engages with the second protrusion 4a2, lifting the striker 4 in the second direction until the piston 5 moves to the locking point and the motor stops. In this embodiment, a position sensor for detecting that the piston 5 moves to the bottom dead center can be provided, and the motor starts to rotate again when the piston moves to the bottom dead center.

[0080] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0081] Although the terms 1, striking part; 2, cylinder; 3, air chamber; 4, striker; 4a, protrusion; 4a1, protrusion 1; 4a2, protrusion 2; 4b, groove; 4c, connector; 4d, protrusion; 4e, fixing hole 2; 4f, guide strip; 5, piston are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A pneumatic nail gun, comprising a nail-exiting portion (9) and an impact portion (1) for driving a nail in the nail-exiting portion (9) out of the nail gun along a first direction, the impact portion (1) comprising a firing pin (4), the firing pin (4) reciprocating in a first direction and in a second direction opposite to the first direction, the nail gun further comprising a lifting portion (11) for moving the firing pin (4) in the second direction, the lifting portion (11) comprising a rotating shaft (13) and a rotating disk (12) for driving the firing pin to move, the rotating shaft (13) and the rotating disk (12) being connected and both being arranged in a mounting tube (8b), characterized in that: The rotating shaft (13) or the rotating disk (12) is connected with a first ratchet pawl (19), and a gear ring (20) cooperating with the first ratchet pawl (19) is also provided in the mounting tube (8b), and a first ratchet tooth (20b) is provided on the inner side of the gear ring (20). The first ratchet pawl (19) is located on the inner side of the gear ring (20) and meshes with the first ratchet tooth (20b) to limit the rotation of the rotating disk (12).

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

3. A pneumatic nailing gun according to claim 2, characterized in that: The gear ring (20) is also provided with a limiting block (20a), and the mounting seat (8) further comprises a limiting cavity (8c), and the limiting block (20a) is located in the limiting cavity (8c).

4. A pneumatic nailing gun according to claim 1, 2 or 3, characterized in that: When the first pawl (19) is connected to the rotating shaft (13), a rotating member (17) is fixed to the rotating shaft (13) and is located above the rotating disk (12); the first pawl (19) is rotatably arranged on the rotating member (17); the first pawl (19) is located between the rotating member (17) and the rotating disk (12); and the first pawl (19) is arranged on the rotating member (17) through a connecting column (47).

5. A pneumatic nailing 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 arranged on the rotating member (17), the other end of the first spring (22) is arranged on the first pawl (19), and a washer (44) is provided between the first pawl (19) and the rotating member (17).

6. A pneumatic nailing gun according to claim 5, characterized in that: The rotating shaft (13) and the rotating disk (12) are movably connected, and the rotating disk (12) and the rotating shaft (13) are connected by a lifting assembly to achieve separation or combination. When the striker (4) moves toward the first direction, the striker (4) drives the rotating disk (12) to rotate.

7. A pneumatic nailing gun according to claim 6, characterized in that: The lifting assembly comprises a second ratchet (12b) arranged on a rotating disk (12) and a second pawl (21) arranged on a rotating member (17); the second ratchet (12b) is located in the middle position of the rotating disk (12) and below the rotating member (17); the second pawl (21) and the second ratchet (12b) are meshed with each other; the second pawl (21) is also provided with a separation member (21a) for separating the second pawl (21) and the second ratchet (12b); a separation column (18) for cooperating with the separation member (21a) is provided in the limiting cavity (8c); a part of the separation column (18) is located in the mounting cylinder (8b); when the separation member (21a) abuts against the separation column (18), the second pawl (21) and the second ratchet (12b) are separated.

8. A pneumatic nailing gun according to claim 7, characterized in that: The rotating member (17) is in the shape of an elongated strip, the first pawl (19) and the second pawl (21) are arranged opposite to each other, the first ratchet teeth (20b) are one-way teeth, and the center of the teeth of the second ratchet wheel (12b) is along the center of the rotating disk (12) toward the outside.

9. A pneumatic nailing gun according to claim 8, characterized in that: The rotating member (17) is provided with a fixed column (17a), the second pawl (21) is rotatably arranged on the fixed column (17a), a second spring (23) is arranged between the second pawl (21) and the rotating member (17), one end of the second spring (23) is arranged on the rotating member (17), and the other end of the second spring (23) is arranged on the inner side of the separating member (21a).

10. The pneumatic nailing gun according to claim 8, characterized in that: The second ratchet (12b) is located below the rotating member (17), the nail-out portion (9) comprises a guide plate (10), the guide plate (10) is provided with a mounting column (10a) located in the limiting cavity (8c), the separation column (18) is sleeved on the mounting column (10a) and the separation column (18) is located below the limiting block (20a), the mounting column (10a) is also sleeved with a limiting column (42), and the limiting column (42) is located between the separation column (18) and the limiting block (20a).

11. A pneumatic nailing gun according to claim 10, characterized in that: The rotating disk (12) is provided with a bayonet (16), the bayonet (16) is arranged continuously at intervals and in a ring shape on the rotating disk (12), the striker (4) is provided with a protrusion (4a) corresponding to the bayonet (16), the protrusion (4a) is engaged with the bayonet (16), the bayonet (16) is cylindrical, and the distance between adjacent protrusions (4a) is greater than the diameter of the bayonet (16).

12. The pneumatic nailing gun according to claim 5, characterized in that: The rotating disk (12) and the rotating shaft (13) are fixed or integrally formed, a bayonet (16) is provided on the rotating disk (12), the bayonet (16) is arranged on the rotating disk (12) in an annular manner, the bayonet (16) is discontinuous on the rotating disk (12), a protrusion (4a) corresponding to the bayonet (16) is provided on the striker (4), the protrusion (4a) is engaged with the bayonet (16), the bayonet (16) is cylindrical, and the distance between adjacent protrusions (4a) is greater than the diameter of the bayonet (16).

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

14. A pneumatic nailing gun according to claim 13, characterized in that: The rotating disk (12) is provided with a bayonet (16), the bayonet (16) is arranged on the rotating disk (12) at annular intervals, the bayonet (16) is discontinuous on the rotating disk (12), the striker (4) is provided with a protrusion (4a) corresponding to the bayonet (16), the protrusion (4a) is engaged with the bayonet (16), the bayonet (16) is cylindrical, and the distance between adjacent protrusions (4a) is greater than the diameter of the bayonet (16).

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