Nail gun capable of adapting to multiple working conditions and convenient to maintain, and method

Abstract

A nail gun capable of adapting to multiple working conditions and convenient to maintain, comprising: a shell assembly, comprising a nail gun shell (2), an assembly frame body (15), and a gun body top cover (1); an energy storage cavity, comprising a large air cylinder (11) and a small air cylinder (12), an air cylinder cap (10) being detachably mounted at the rear end of the large air cylinder (11), an air cylinder head seat (18) being mounted at the front end of the large air cylinder (11), and a through hole (12-3) communicated with the large air cylinder (11) being formed in the rear end of the small air cylinder (12), so that the large air cylinder (11) and the small air cylinder (12) jointly form a closed energy storage cavity; a driver pin assembly (13), comprising a driver pin body (13-2) and a piston (13-1), the piston (13-1) being relatively slidably arranged in the energy storage cavity; the air cylinder head seat (18), comprising an air cylinder connecting cover (18-1) and a motor connecting sleeve (18-2), the assembly frame body (15) being fixed on the air cylinder head seat (18); and a drive cam (14), unidirectionally driven by a motor (6) to drive the piston (13-1) to compress air in the energy storage cavity. Easy replacement of working parts of different models, specifications, and sizes or the adjustment of air pressure to match various working conditions can be achieved by only detaching local parts, without disassembling the whole nail gun. Also provided is a method for multi-working condition adaptation and maintenance of a nail gun.

Description

A nail gun and method capable of adapting to multiple working conditions and convenient maintenance Technical Field

[0001] The present invention relates to the field of nail guns, and in particular to a nail gun and a method that can adapt to multiple working conditions and is easy to maintain. Background Art

[0002] In the nail gun market, nail guns are both professional tools and suitable for simple home and personal decoration and renovation. Existing nail guns are difficult to use with a wide variety of nail specifications and sizes, and malfunctions require complete disassembly for repair and maintenance. This is difficult for non-professionals (such as those using them at home), resulting in a poor user experience. If a nail gun could allow consumers to easily replace working parts of different models, specifications, and sizes, or adjust the air pressure to suit different working conditions (such as different wood or wall textures, nails of different lengths or sizes, matching the specifications and sizes of the punch assembly, and adjusting the pressure in the energy storage chamber to match the required nailing force) without disassembling the entire gun, the user experience would be greatly improved. This can prevent the problem of penetrating wooden boards or walls when driving soft media (such as short nails and thin nails); when driving hard media (such as long nails and thick nails), the nails cannot be completely driven into the wooden boards or walls, or the punch cannot match nails of different specifications and sizes, or when the wearing parts inside the nail gun are damaged or malfunction, it is convenient and easy to replace and maintain, thereby increasing the freedom of use of the nail gun and improving the user experience. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a nail gun and method that can adapt to multiple working conditions and are easy to maintain, so that consumers can easily replace working parts of different models, specifications and sizes or adjust the air pressure to match different working conditions without disassembling the entire gun by only opening local parts. In addition, when the wearing parts inside the nail gun are damaged or abnormal, they can be easily replaced and maintained.

[0004] The purpose of the present invention is to achieve the following technical solution: This nail gun that can adapt to multiple working conditions and is easy to maintain includes:

[0005] The housing assembly includes a gun housing, an assembly frame body arranged at the front end of the gun housing, and a gun body top cover detachably mounted at the rear end of the gun housing, and a nail clip is connected to the lower part of the assembly frame body;

[0006] The energy storage chamber includes a large cylinder disposed in the gun housing and a small cylinder sleeved in the large cylinder. A cylinder cover is detachably mounted on the rear end of the large cylinder for compressing and sealing the rear end of the small cylinder. A cylinder head seat is mounted on the front end of the large cylinder for sealing, and the front end of the small cylinder abuts against the cylinder head seat. A through hole is opened at the rear end of the small cylinder for communication with the large cylinder, so that the large cylinder and the small cylinder cooperate to form a closed energy storage chamber.

[0007] The punch needle assembly includes a punch needle body and a piston fixed to the rear end of the punch needle body. The piston is relatively slidably placed in the energy storage chamber to adjust the air pressure in the energy storage chamber between the initial air pressure and the energy storage pressure. The front end of the punch needle body passes through the cylinder head seat and extends into the assembly frame body to strike the nails in the assembly frame body.

[0008] The cylinder head seat includes a cylinder connection cover detachably connected to the large cylinder and a motor connection sleeve for connecting to the motor, and the assembly frame is fixed to the cylinder head seat; and

[0009] The driving cam is driven unidirectionally by the motor and is provided with a plurality of cam pins for engaging with the punch pin teeth on the punch pin body, thereby driving the piston to compress the gas in the energy storage chamber;

[0010] After the top cover of the gun body is removed, the cylinder cover is exposed from the rear end of the gun shell. A valve core is installed on the cylinder cover to connect the outside world with the energy storage chamber and adjust the initial air pressure of the energy storage chamber. After the cylinder cover is removed, the small cylinder is exposed from the rear end of the large cylinder, which is convenient for removing or replacing the small cylinder and punch needle assembly.

[0011] As a further technical solution, a buffer pad is provided between the cylinder connecting cover and the small cylinder for buffering the piston; a punching needle groove is provided on both the buffer pad and the cylinder connecting cover so that the punching needle body passes through and extends into the punching needle track in the assembly frame body.

[0012] As a further technical solution, a plurality of cylinder head seat holes are opened on the cylinder connecting cover, and a boss is provided on the end surface of the buffer pad for being embedded and installed in the cylinder head seat hole. At least one of the cylinder head seat holes close to the decorative cover is set through and serves as a cylinder head seat ejection hole; a decorative cover is detachably installed between the gun housing and the assembly frame. After the decorative cover is removed, the cylinder head seat ejection hole exposes the cylinder connecting cover, which is convenient for ejecting the buffer pad.

[0013] As a further technical solution, a gearbox is provided in the motor connecting sleeve, and the output end of the motor transmits power to the camshaft after being decelerated by the gearbox. A one-way bearing is provided on the camshaft to enable the driving cam to maintain unidirectional rotation.

[0014] As a further technical solution, it also includes a mode conversion setting switch installed on the surface of the gun housing and a control circuit board arranged in the gun housing. The mode conversion setting switch is electrically connected to the control circuit board and is used to set the working gear and send the working gear signal to the control circuit board; the working gear includes a normal gear and a maintenance gear. In the normal gear, after the punch needle assembly is fully released, the gas in the energy storage chamber returns to the initial air pressure, and the control circuit board controls the driving cam to drive the punch needle assembly to compress the gas in the energy storage chamber and increase the pressure. When the pressure is increased to the energy storage pressure, the control circuit board controls the driving cam to stop, and the one-way bearing keeps the punch needle assembly stopped at a preset position to maintain the energy storage pressure; in the maintenance gear, after the punch needle assembly is fully released, the control circuit board controls the driving cam to stop working, and the gas in the energy storage chamber maintains the initial air pressure.

[0015] As a further technical solution, an internal thread is provided at the front end of the large cylinder for cooperating with the external thread on the cylinder connecting cover, and a plurality of ears are evenly distributed along the circumferential direction on the outer wall of the rear end of the large cylinder, and connecting holes are provided on the ears for cooperating with the cylinder head screws on the cylinder head.

[0016] As a further technical solution, one end of the valve core is connected to the inner cavity of the small cylinder, and the other end of the valve core is connected to the outside and sealed with a valve core air cap. A cylinder head sealing ring is installed on the inside of the cylinder head to cooperate with the end face of the large cylinder to seal.

[0017] As a further technical solution, a small cylinder sealing groove is provided on the outer wall at the front end of the small cylinder for installing a small cylinder sealing ring, and the small cylinder sealing ring contacts and seals with the inner wall of the large cylinder; a number of through holes are evenly distributed along the circumferential direction on the outer wall at the rear end of the small cylinder, and steps are provided along the circumferential direction of the inner side of each through hole, so that the inner diameter of the small cylinder at the through hole is larger than the inner diameter at the step.

[0018] A nail gun multi-working condition adaptation and maintenance method, using the above-mentioned nail gun that can adapt to multiple working conditions and is easy to maintain, includes the following working modes:

[0019] Normal mode: Set the mode conversion setting switch to the normal gear, pull the nail gun trigger, after the punch needle assembly is completely released, the gas in the energy storage chamber returns to the initial pressure, and the control circuit board controls the drive cam to drive the punch needle assembly to compress the gas in the energy storage chamber to increase the pressure. When the pressure reaches the energy storage pressure, the control circuit board controls the drive cam to stop, and the one-way bearing keeps the punch needle assembly stopped at the preset position to maintain the energy storage pressure. Pull the nail gun trigger again to release the punch needle assembly to hit the nail, realizing the cycle work;

[0020] Adaptation mode: Set the mode conversion setting switch to the maintenance gear, pull the nail gun trigger, and after the punch needle assembly is completely released, the control circuit board controls the drive cam to stop working and detach from the punch needle assembly, no longer driving the punch needle assembly to return, and the gas in the energy storage chamber maintains the initial air pressure. At this time, remove the gun body top cover, unscrew the valve core air cap on the cylinder head, push open the valve core, release the gas in the energy storage chamber, use an external air source to connect the valve core to inflate the energy storage chamber, and adjust the inflation pressure according to the actual working conditions to change the initial air pressure of the energy storage chamber. After completion, tighten the valve core air cap, cover the gun body top cover, and switch the mode conversion setting switch back to the normal gear;

[0021] Maintenance mode: Set the mode conversion setting switch to the maintenance position, pull the trigger of the nail gun, and after the punch needle assembly is completely released, the control circuit board controls the drive cam to stop working and disengage from the punch needle assembly, and no longer drives the punch needle assembly to return. The gas in the energy storage chamber maintains the initial air pressure. At this time, remove the gun body top cover and decorative cover, unscrew the valve core air cap, push open the valve core, release the gas in the energy storage chamber, and then open the cylinder cover, take out the small cylinder, punch needle assembly and buffer pad in the energy storage chamber in turn for replacement. When installing, install the buffer pad first, then put the small cylinder into the large cylinder, install the punch needle assembly, and push it to the bottom, then cover the cylinder cover, inflate the energy storage chamber through the valve core, tighten the valve core air cap after inflating, install the gun body top cover and decorative cover, and switch the mode conversion setting switch back to the normal gear.

[0022] As a further technical solution, in the adaptation mode, the inflation pressure when hitting hard materials and long nails is greater than the inflation pressure when hitting soft materials and short nails; in the maintenance mode, the small cylinder can be removed by hooking the tool on the through hole and dragging it axially.

[0023] The beneficial effects of the present invention are:

[0024] 1. The gun body top cover and cylinder head are detachable. When the cylinder head seal fails, the small cylinder is worn, the punch needle assembly is damaged, the shock absorber is broken, or the small cylinder seal fails, these parts can be easily replaced and the nail gun can be used normally, greatly extending the service life of the nail gun.

[0025] 2. It can adapt to different working conditions and replace parts of different models, specifications and sizes: when hitting hard materials, long nails or thick nails, it is necessary to replace the large-bore small cylinder and the corresponding diameter with a higher-strength punching needle assembly and buffer pad of different specifications and sizes; when hitting soft materials, short nails or thin nails, it is necessary to replace the small-bore small cylinder and the corresponding diameter with a slightly lower-strength punching needle assembly and buffer pad of different specifications and sizes; the energy storage chamber can also be inflated through the valve core, and the inflation pressure can be appropriately adjusted according to the working conditions, so that it can perfectly adapt to different working conditions;

[0026] 3. The mode conversion setting switch on the gun housing can flexibly adjust the working mode;

[0027] 4. A cylinder head seat ejection hole is provided on the cylinder connection cover to eject the cushion for easy replacement.

[0028] 5. The inner diameter of the small cylinder at the through hole is larger than the inner diameter at the step. When using a tool to hook the through hole to take out the small cylinder, the cylinder diameter surface of the small cylinder will not be damaged, thereby extending the service life of the small cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a schematic diagram of the main structure of the present invention.

[0030] FIG2 is a cross-sectional view taken along line AA of FIG1 .

[0031] FIG3 is a schematic diagram of the top view of the structure of the present invention.

[0032] FIG4 is a sectional view taken along line BB in FIG3 .

[0033] FIG5 is a structural schematic diagram 1 of the cylinder head of the present invention.

[0034] FIG6 is a structural schematic diagram 2 of the cylinder head in the present invention.

[0035] FIG7 is a structural diagram 1 of the large cylinder in the present invention.

[0036] FIG8 is a structural diagram 2 of the large cylinder in the present invention.

[0037] FIG9 is a schematic diagram of the three-dimensional structure of the small cylinder of the present invention.

[0038] FIG10 is a schematic cross-sectional view of the small cylinder of the present invention.

[0039] FIG11 is a schematic diagram of the assembly structure of the motor, gearbox, one-way bearing and driving cam in the present invention.

[0040] FIG12 is a schematic diagram 1 of the assembly structure of the motor, cylinder head seat, and assembly frame in the present invention.

[0041] FIG13 is a schematic diagram 2 of the assembly structure of the motor, cylinder head seat, and assembly frame in the present invention.

[0042] FIG14 is a schematic structural diagram of the cylinder head seat of the present invention.

[0043] FIG15 is a schematic structural diagram of the buffer pad of the present invention.

[0044] FIG16 is a schematic diagram of the structure when the gun body top cover and the cylinder cover are disassembled in the present invention.

[0045] FIG17 is a schematic diagram of the structure when the gun body top cover, cylinder cover and decorative cover are disassembled in the present invention.

[0046] Description of the accompanying drawings: gun body top cover 1, top cover screw 1-1, gun housing 2, mode conversion setting switch 3, control circuit board 4, nail clip 5, motor 6, gear box 7, one-way bearing 8, decorative cover 9, decorative cover screw 9-1, cylinder head 10, valve core 10-1, valve core air cap 10-2, cylinder head screw 10-3, cylinder head sealing ring 10-4, large cylinder 11, internal thread 11-1, ear 11-2, connecting hole 11-3, small cylinder 12, small cylinder sealing ring 12-1, small cylinder sealing groove 12-2, through hole 12-3, platform Step 12-4, punch needle assembly 13, piston 13-1, punch needle body 13-2, punch needle tooth 13-3, optical coupler sensing notch 13-4, drive cam 14, camshaft 14-1, cam pin 14-2, assembly frame 15, punch needle track 15-1, sensing optical coupler 16, clutch pawl 17, pawl toggle handle 17-1, pawl head 17-2, cylinder head seat 18, cylinder connecting cover 18-1, motor connecting sleeve 18-2, cylinder head seat ejection hole 18-3, external thread 18-4, punch needle groove 18-5, buffer pad 19, boss 19-1. Implementation Method

[0047] The present invention will be described in detail below with reference to the accompanying drawings:

[0048] Embodiment: As shown in Figures 1 to 17, this nail gun that can adapt to multiple working conditions and is easy to maintain includes a gun body top cover 1, a top cover screw 1-1, a gun housing 2, a mode conversion setting switch 3, a control circuit board 4, a nail clamp 5, a motor 6, a gear box 7, a one-way bearing 8, a decorative cover 9, a decorative cover screw 9-1, a cylinder head 10, a valve core 10-1, a valve core air cap 10-2, a cylinder head screw 10-3, a cylinder head sealing ring 10-4, a large cylinder 11, an internal thread 11-1, an ear 11-2, a connecting hole 11-3, a small cylinder 12, a small cylinder sealing ring 12-1, and a small cylinder sealing groove 1 2-2, through hole 12-3, step 12-4, punch needle assembly 13, piston 13-1, punch needle body 13-2, punch needle tooth 13-3, optical coupler sensing notch 13-4, drive cam 14, camshaft 14-1, cam pin 14-2, assembly frame 15, punch needle track 15-1, inductive optical coupler 16, clutch pawl 17, pawl toggle handle 17-1, pawl head 17-2, cylinder head seat 18, cylinder connecting cover 18-1, motor connecting sleeve 18-2, cylinder head seat ejection hole 18-3, external thread 18-4, punch needle groove 18-5, buffer pad 19 and boss 19-1.

[0049] 2 and 4 , an assembly frame 15 is provided at the front end of the gun housing 2, a gun body top cover 1 is detachably mounted at the rear end of the gun housing 2 via a top cover screw 1 - 1 , and a nail clip 5 is connected to the lower part of the assembly frame 15 . The gun housing 2 , the gun body top cover 1 and the assembly frame 15 together constitute a housing assembly of the nail gun.

[0050] A large cylinder 11 is disposed within the upper space of the gun housing 2, and a small cylinder 12 is housed within the large cylinder 11. As shown in Figures 5 to 8, the rear end of the large cylinder 11 is detachably mounted to the cylinder head 10 via cylinder head screws 10-3. The cylinder head 10 is used to compress and seal the rear end surface of the small cylinder 12. The front end of the large cylinder 11 is provided with an internal thread 11-1 that mates with the external thread 18-4 on the cylinder connection cover 18-1, sealingly connecting the large cylinder 11 to the cylinder head seat 18. A plurality of ears 11-2 are evenly distributed along the circumferential direction on the outer wall of the rear end of the large cylinder 11. Each ear 11-2 has a connecting hole 11-3 formed therein for engaging with the cylinder head screws 10-3 on the cylinder head 10. The front end of the small cylinder 12 rests on the cylinder head seat 18 (cylinder connecting cover 18-1), and the rear end of the small cylinder 12 is provided with a through hole 12-3 connected to the large cylinder 11, so that the large cylinder 11 and the small cylinder 12 cooperate to form a closed energy storage chamber.

[0051] As shown in Figures 9 and 10, a small cylinder sealing groove 12-2 is provided on the front outer wall of the small cylinder 12 for mounting a small cylinder sealing ring 12-1, which contacts and seals the inner wall of the large cylinder 11. Four through-holes 12-3 (preferably waist-shaped holes) are evenly distributed along the circumference of the rear outer wall of the small cylinder 12. Steps 12-4 are provided along the inner circumference of each through-hole 12-3. This ensures that the inner diameter of the small cylinder 12 at the through-holes 12-3 is larger than at the steps 12-4. When a tool is used to hook the through-hole to remove the small cylinder, the cylinder bore surface of the small cylinder will not be damaged, thereby extending the service life of the small cylinder.

[0052] Referring to FIG2 , the punch assembly 13 includes a punch body 13-2 and a piston 13-1 fixed to the rear end of the punch body 13-2. The piston 13-1 is slidably positioned within the energy storage chamber (small cylinder 12), adjusting the pressure within the energy storage chamber between the initial pressure and the stored pressure. When the punch assembly 13 is fully released and the piston 13-1 presses against the cushion 19, the pressure within the energy storage chamber reaches the initial pressure. When the driving cam 14 drives the piston 13-1 to a set position and stops, the pressure within the energy storage chamber returns to the stored pressure. As shown in FIG14 and FIG15 , a cushion 19 is positioned between the cylinder connection cover 18-1 and the small cylinder 12 to cushion the piston 13-1. Both the cushion 19 and the cylinder connection cover 18-1 define a punch groove 18-5, allowing the punch body 13-2 to pass through and extend into the punch track 15-1 within the assembly frame 15, thereby striking a nail within the assembly frame 15. Two cylinder head seat holes are defined in the cylinder connection cover 18-1. Two corresponding bosses 19-1 are provided on the end surface of the cushioning pad 19, allowing it to be inserted into these holes. The cylinder head seat hole near the decorative cover 9 is through-hole, serving as a cylinder head seat ejection hole 18-3. The decorative cover 9 is removably mounted between the gun housing 2 and the assembly frame 15. As shown in Figure 17, when the decorative cover 9 is removed, the cylinder head seat ejection holes 18-3 are exposed to the cylinder connection cover 18-1, facilitating the ejection of the cushioning pad 19 using a tool.

[0053] As shown in Figures 12 to 14, the cylinder head base 18 includes a cylinder connection cover 18-1 that is detachably connected to the large cylinder 11 and a motor connection sleeve 18-2 for connecting to the motor 6. The motor connection sleeve 18-2 is provided with a gearbox 7. The output end of the motor 6 is decelerated by the gearbox 7 and then transmitted to the camshaft 14-1. The camshaft 14-1 is provided with a one-way bearing 8, so that the driving cam 14 maintains unidirectional rotation. The driving cam 14 is driven unidirectionally by the motor 6. Four cam pins 14-2 are provided on the driving cam 14 to engage with the punch pin teeth 13-3 on one side of the punch pin body 13-2, thereby driving the piston 13-1 to compress the gas in the energy storage chamber. The assembly frame 15 is fixedly mounted on the cylinder head base 18.

[0054] Referring to Figures 16 and 17 , after the gun body top cover 1 is removed, the cylinder head 10 is exposed from the rear end of the gun housing 2. A valve core 10-1 is mounted in the center of the cylinder head 10, connecting the outside world to the energy storage chamber and regulating the initial air pressure in the energy storage chamber. After the cylinder head 10 is removed, the small cylinder 12 is exposed from the rear end of the large cylinder 11, facilitating the removal or replacement of the small cylinder 12 and the punch needle assembly 13. One end of the valve core 10-1 communicates with the inner cavity of the small cylinder 12, while the other end of the valve core 10-1 communicates with the outside world and is sealed with a valve core airtight cap 10-2. A cylinder head sealing ring 10-4 is mounted on the inside of the cylinder head 10 to seal the end face of the large cylinder 11. Preferably, as shown in Figures 2 and 16 , a clutch pawl 17 is rotatably mounted on the side of the cylinder head seat 18 facing away from the punch needle tooth 13-3 via a torsion spring. One end of the clutch pawl 17 is a pawl head 17-2, and the other end is a pawl toggle handle 17-1. When the driving cam 14 rotates one circle and disengages the punching pin tooth 13-3, the pawl head 17-2 can just fit into the corresponding notch on the punching pin body 13-2, maintaining the position of the punching pin body 13-2 until the driving cam 14 continues to rotate and engages with the punching pin tooth 13-3 again. In addition, when it is necessary to remove the punching pin assembly 13, the pawl toggle handle 17-1 is used to toggle the clutch pawl 17, so that the pawl head 17-2 clears the notch on the punching pin body 13-2, facilitating the complete removal of the punching pin assembly 13. An inductive optical coupler 16 is also provided near the installation position of the clutch pawl 17, which can cooperate with the optical coupler sensing notch 13-4 on the punch needle body 13-2 (the small hole on the punch needle body 13-2 in Figure 16), thereby sensing and judging the position of the punch needle body 13-2 (the punch needle assembly 13), and at the same time, the inductive optical coupler 16 sends the position information to the control circuit board 4.

[0055] Furthermore, a mode conversion setting switch 3 is installed on the surface of the gun housing 2, and a control circuit board 4 is set in the lower space of the gun housing 2. The mode conversion setting switch 3 is electrically connected to the control circuit board 4. The mode conversion setting switch 3 is used to set the working gear and send the working gear signal to the control circuit board 4. The working gear includes a normal gear and a maintenance gear. In the normal gear, after the punch needle assembly 13 is fully released, the gas in the energy storage chamber returns to the initial air pressure. The control circuit board 4 controls the driving cam 14 to drive the punch needle assembly 13 to compress the gas in the energy storage chamber and increase the pressure. When the pressure is increased to the energy storage pressure, the control circuit board 4 controls the driving cam 14 to stop, and the one-way bearing 8 keeps the punch needle assembly 13 at the preset position to maintain the energy storage pressure. In the maintenance gear, after the punch needle assembly 13 is fully released, the control circuit board 4 controls the driving cam 14 to stop working, and the gas in the energy storage chamber maintains the initial air pressure, which is convenient for subsequent disassembly and maintenance.

[0056] As another aspect of this embodiment, a nail gun multi-working condition adaptation and maintenance method is provided, which uses the above-mentioned nail gun that can adapt to multiple working conditions and is easy to maintain, including the following working modes:

[0057] Normal mode: Set the mode conversion setting switch 3 to the normal gear, pull the nail gun trigger, and after the punch needle assembly 13 is completely released, the gas in the energy storage chamber returns to the initial air pressure. The control circuit board 4 controls the driving cam 14 to drive the punch needle assembly 13 to compress the gas in the energy storage chamber to increase the pressure. When the pressure is increased to the energy storage pressure, the control circuit board 4 controls the driving cam 14 to stop rotating, and the one-way bearing 8 keeps the punch needle assembly 13 stopped at the preset position to maintain the energy storage pressure. Pulling the nail gun trigger again can release the punch needle assembly 13 to hit the nail, realizing the cycle work.

[0058] Adaptive Mode: Set the mode conversion setting switch 3 to the maintenance position and pull the nail gun trigger. After the punch assembly 13 is fully released, the control circuit board 4 controls the drive cam 14 to stop working and disengage from the punch assembly 13, no longer driving the punch assembly 13 back, and the gas in the energy storage chamber maintains its initial pressure. At this time, remove the gun body top cover 1, unscrew the valve core air cap 10-2 on the cylinder head 10, push open the valve core 10-1, release the gas in the energy storage chamber, and connect the valve core 10-1 with an external air source to inflate the energy storage chamber. The inflation pressure is adjusted according to the actual working conditions to change the initial pressure of the energy storage chamber. After completion, tighten the valve core air cap 10-2, replace the gun body top cover 1, and return the mode conversion setting switch 3 to the normal position. Preferably, the inflation pressure is appropriately increased when driving hard materials and long nails, and appropriately reduced when driving soft materials and short nails. The inflation pressure for driving hard materials and long nails is greater than that for driving soft materials and short nails. This can prevent the wood or wall from being penetrated when driving short nails into soft materials, and prevent the nails from being completely driven into the wood or wall when driving long nails into hard materials.

[0059] Maintenance mode: put the mode conversion setting switch 3 into the maintenance gear, pull the nail gun trigger, and after the punch needle assembly 13 is completely released, the control circuit board 4 controls the driving cam 14 to stop working and disengage from the punch needle assembly 13, no longer driving the punch needle assembly 13 to return, and the gas in the energy storage chamber maintains the initial air pressure. At this time, remove the gun body top cover 1 and the decorative cover 9, unscrew the valve core air cap 10-2, push open the valve core 10-1, release the gas in the energy storage chamber, and then open the cylinder cover 10, take out the small cylinder 12, the punch needle assembly 13 and the buffer pad 19 in the energy storage chamber in turn for replacement. Preferably, the small cylinder 12 can be taken out by hooking it on the through hole 12-3 with a special tool and dragging it axially. Since the inner diameter of the small cylinder 12 at the through hole 12-3 is larger than the inner diameter at the step 12-4, when the tool is used to hook the through hole to take out the small cylinder, the cylinder diameter surface of the small cylinder will not be damaged, thereby extending the service life of the small cylinder. During installation, first install the buffer pad 19, then insert the small cylinder 12 with the small cylinder sealing ring 12-1 into the large cylinder 11, push the clutch pawl 17 to avoid the punch needle body 13-2, then install the punch needle assembly 13, and push it to the bottom, then cover the cylinder cover 10, and inflate the energy storage chamber through the valve core 10-1. After inflating, tighten the valve core air cap 10-2, install the gun body top cover 1 and the decorative cover 9, and switch the mode conversion setting switch 3 back to the normal gear.

[0060] It is understandable that for those skilled in the art, any equivalent replacement or change to the technical solution and inventive concept of the present invention should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A nail gun that can adapt to multiple working conditions and is easy to maintain. It is characterized in that include: The housing assembly comprises a gun housing (2), an assembly frame (15) arranged at the front end of the gun housing (2), and a gun body top cover (1) detachably mounted at the rear end of the gun housing (2), wherein the lower part of the assembly frame (15) is connected to a nail clip (5); An energy storage chamber comprises a large cylinder (11) arranged in a gun housing (2) and a small cylinder (12) sleeved in the large cylinder (11); a cylinder cover (10) is detachably mounted at the rear end of the large cylinder (11) for pressing and sealing the rear end of the small cylinder (12); a cylinder head seat (18) is mounted at the front end of the large cylinder (11) for sealing, and the front end of the small cylinder (12) abuts against the cylinder head seat (18); a through hole (12-3) is formed at the rear end of the small cylinder (12) and is communicated with the large cylinder (11), so that the large cylinder (11) and the small cylinder (12) cooperate to form a closed energy storage chamber; A punching needle assembly (13) comprises a punching needle body (13-2) and a piston (13-1) fixed to the rear end of the punching needle body (13-2); the piston (13-1) is relatively slidably placed in the energy storage chamber so that the air pressure in the energy storage chamber is adjusted between the initial air pressure and the energy storage air pressure; the front end of the punching needle body (13-2) passes through the cylinder head seat (18) and extends into the assembly frame (15) for striking nails in the assembly frame (15); A cylinder head seat (18) comprising a cylinder connection cover (18-1) detachably connected to the large cylinder (11) and a motor connection sleeve (18-2) for connecting to the motor (6), the assembly frame (15) being fixed on the cylinder head seat (18); and A driving cam (14) is driven unidirectionally by a motor (6) and is provided with a plurality of cam pins (14-2) for engaging with the punching needle teeth (13-3) on the punching needle body (13-2), thereby driving the piston (13-1) to compress the gas in the energy storage chamber; After the gun body top cover (1) is disassembled, the cylinder cover (10) is exposed from the rear end of the gun shell (2). A valve core (10-1) is installed on the cylinder cover (10) for connecting the outside with the energy storage chamber and adjusting the initial air pressure of the energy storage chamber. After the cylinder cover (10) is disassembled, the small cylinder (12) is exposed from the rear end of the large cylinder (11), so that the small cylinder (12) and the punch needle assembly (13) can be easily removed or replaced.

2. The nail gun capable of adapting to multiple working conditions and convenient for maintenance according to claim 1, Features: A buffer pad (19) is provided between the cylinder connection cover (18-1) and the small cylinder (12) for buffering the piston (13-1); a punching needle groove (18-5) is provided on both the buffer pad (19) and the cylinder connection cover (18-1) so that the punching needle body (13-2) passes through and then extends into a punching needle track (15-1) in the assembly frame (15).

3. The nail gun capable of adapting to multiple working conditions and convenient for maintenance according to claim 2, Features: A plurality of cylinder head seat holes are provided on the cylinder connection cover (18-1), and a boss (19-1) is provided on the end surface of the buffer pad (19) for being embedded in the cylinder head seat hole. At least one of the cylinder head seat holes near the decorative cover (9) is through-set to serve as a cylinder head seat ejection hole (18-3). A decorative cover (9) is detachably installed between the gun housing (2) and the assembly frame (15). After the decorative cover (9) is removed, the cylinder head seat ejection hole (18-3) is exposed from the cylinder connection cover (18-1), thereby facilitating ejection of the buffer pad (19).

4. The nail gun capable of adapting to multiple working conditions and convenient for maintenance according to claim 1, Features: A gear box (7) is arranged in the motor connecting sleeve (18-2), and the output end of the motor (6) transmits power to the camshaft (14-1) after being decelerated by the gear box (7). A one-way bearing (8) is sleeved on the camshaft (14-1), so that the driving cam (14) maintains unidirectional rotation.

5. The nail gun capable of adapting to multiple working conditions and convenient for maintenance according to claim 4, Features: The gun also comprises a mode conversion setting switch (3) mounted on the surface of the gun housing (2) and a control circuit board (4) arranged in the gun housing (2). The mode conversion setting switch (3) is electrically connected to the control circuit board (4) and is used to set a working gear and send a working gear signal to the control circuit board (4). The working gear comprises a normal gear and a maintenance gear. In the normal gear, after the punch needle assembly (13) is completely released, the gas in the energy storage chamber returns to the initial pressure. The control circuit board (4) controls the driving cam (14) to drive the punch needle assembly (13) to compress the gas in the energy storage chamber to increase the pressure. When the pressure is increased to the energy storage pressure, the control circuit board (4) controls the driving cam (14) to stop rotating, and the one-way bearing (8) holds the punch needle assembly (13) at a preset position to maintain the energy storage pressure. In the maintenance gear, after the punch needle assembly (13) is completely released, the control circuit board (4) controls the driving cam (14) to stop working, and the gas in the energy storage chamber maintains the initial pressure.

6. The nail gun capable of adapting to multiple working conditions and convenient for maintenance according to claim 1, Features: The front end of the large cylinder (11) is provided with an internal thread (11-1) for matching with the external thread (18-4) on the cylinder connection cover (18-1); a plurality of ears (11-2) are evenly distributed along the circumferential direction on the outer wall of the rear end of the large cylinder (11); the ears (11-2) are provided with connection holes (11-3) for matching with the cylinder head screws (10-3) on the cylinder head (10).

7. The nail gun capable of adapting to multiple working conditions and convenient for maintenance according to claim 1 or 6, Features: One end of the valve core (10-1) is in communication with the inner cavity of the small cylinder (12), and the other end of the valve core (10-1) is in communication with the outside and is sealed by a valve core airtight cap (10-2). A cylinder head sealing ring (10-4) is installed on the inner side of the cylinder head (10) for cooperating with and sealing the end surface of the large cylinder (11).

8. The nail gun capable of adapting to multiple working conditions and convenient for maintenance according to claim 1, Features: A small cylinder sealing groove (12-2) is provided on the front end outer wall of the small cylinder (12) for mounting a small cylinder sealing ring (12-1), and the small cylinder sealing ring (12-1) contacts and seals with the inner wall of the large cylinder (11); a plurality of through holes (12-3) are evenly distributed along the circumferential direction on the rear end outer wall of the small cylinder (12), and steps (12-4) are provided along the inner circumferential direction of each through hole (12-3), so that the inner diameter of the small cylinder (12) at the through hole (12-3) is larger than the inner diameter at the step (12-4).

9. A nail gun multi-working condition adaptation and maintenance method, using the nail gun capable of adapting to multiple working conditions and convenient maintenance as described in any one of claims 1 to 8, It is characterized in that The following working modes are included: Normal mode: put the mode conversion setting switch (3) in the normal gear position, pull the nail gun trigger, after the punch needle assembly (13) is completely released, the gas in the energy storage chamber returns to the initial pressure, the control circuit board (4) controls the driving cam (14) to drive the punch needle assembly (13) to compress the gas in the energy storage chamber to increase the pressure, when the pressure increases to the energy storage pressure, the control circuit board (4) controls the driving cam (14) to stop, the one-way bearing (8) keeps the punch needle assembly (13) stopped at the preset position, maintains the energy storage pressure, and pulls the nail gun trigger again to release the punch needle assembly (13) to hit the nail, thus realizing the cycle operation; Adaptation mode: put the mode conversion setting switch (3) in the maintenance position, pull the trigger of the nail gun, and after the punch needle assembly (13) is completely released, the control circuit board (4) controls the driving cam (14) to stop working and detach from the punch needle assembly (13), and no longer drives the punch needle assembly (13) to return. The gas in the energy storage chamber maintains the initial air pressure. At this time, remove the gun body top cover (1), unscrew the valve core air cap (10-2) on the cylinder head (10), push open the valve core (10-1), release the gas in the energy storage chamber, use an external air source to connect the valve core (10-1) to inflate the energy storage chamber, and adjust the inflation pressure according to the actual working conditions to change the initial air pressure of the energy storage chamber. After completion, tighten the valve core air cap (10-2), cover the gun body top cover (1), and switch the mode conversion setting switch (3) back to the normal position; Maintenance mode: Place the mode conversion setting switch (3) in the maintenance position and pull the trigger of the nail gun. After the punching pin assembly (13) is completely released, the control circuit board (4) controls the driving cam (14) to stop working and detach from the punching pin assembly (13). The punching pin assembly (13) is no longer driven to return. The gas in the energy storage chamber maintains the initial pressure. At this time, remove the gun body top cover (1) and the decorative cover (9), unscrew the valve core air cap (10-2), push open the valve core (10-1), release the gas in the energy storage chamber, and then open the cylinder cover (10 ), take out the small cylinder (12), the punch needle assembly (13) and the buffer pad (19) in the energy storage chamber in turn for replacement. When installing, first install the buffer pad (19), then insert the small cylinder (12) into the large cylinder (11), install the punch needle assembly (13) and push it to the bottom, then cover the cylinder cover (10), and inflate the energy storage chamber through the valve core (10-1). After inflating, tighten the valve core air cap (10-2), install the gun body top cover (1) and the decorative cover (9), and switch the mode conversion setting switch (3) back to the normal gear.

10. The nail gun multi-working condition adaptation and maintenance method according to claim 9, Features: In the adaptation mode, the inflation pressure when driving hard materials and long nails is greater than the inflation pressure when driving soft materials and short nails; in the maintenance mode, the small cylinder (12) can be removed by hooking a tool on the through hole (12-3) and dragging it axially.

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