A nail gun punch pin intelligent identification mechanism and identification method

Abstract

The application discloses a nail gun punch pin intelligent recognition mechanism and a recognition method, and relates to the field of electric tools.The mechanism comprises a nail clamp, an assembly rack body and an energy storage body.The nail clamp is arranged below the assembly rack body and is used for feeding nails into the assembly rack body.The energy storage body is arranged behind the assembly rack body.A motor is arranged in a nail gun shell and is used for driving a punch pin driving cam to rotate.The application opens a recognition hole on the punch pin, cooperates with an inductive photocoupler to continuously acquire three in-place signals, and further utilizes a control circuit to communicate and control the motor, so that four working conditions, i.e., normal working, assembly failure, nail jamming punch pin and springback failure, are recognized, and corresponding alarm signals are sent according to the working conditions.

Description

Technical Field

[0001] The present invention relates to the field of electric tools, and in particular to an intelligent identification mechanism and method for a nail gun punch pin. Background Art

[0002] In the nail gun market, nail guns are both professional tools and suitable for ordinary households and individuals to use for simple decoration and renovation. During use, after accumulating enough potential energy in the punch, the punch is released, and the punch instantly hits the nail into wood and other objects, ensuring that the punch moves accurately while accumulating enough potential energy. After the energy storage is completed, the punch is released, and the punch can hit nails into wooden boards and other objects without obstacles. This process can be accurately cycled after each pull of the trigger, and various factors that affect the nailing effect or even damage the nail gun during the nailing process (nail jamming, knots in the wood, too hard, foreign objects inside, such as broken nails, or off-center shots, hitting hard objects such as stones) can be intelligently identified to protect the nail gun and ensure that the nail gun is not damaged. This is the key to whether the nail gun can work normally for a long time. 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 punch intelligent identification mechanism and identification method, which ensures that the punch moves accurately when accumulating sufficient potential energy. After the energy storage is completed, the punch is released and can hit nails into objects such as wooden boards without obstacles. In addition, various factors that affect the nailing effect or even damage the nail gun during the nailing process (nail jamming, knots in the wood, too hard wood, foreign objects inside, such as broken nails inside, etc., or off-center nails, hitting hard objects such as stones) are intelligently identified to protect the nail gun and ensure that the nail gun is not damaged.

[0004] The purpose of the present invention is to achieve the following technical solution: This nail gun punch needle intelligent identification method performs or identifies the following four working conditions:

[0005] Normal operation includes the following processes:

[0006] S1, the punch needle is in the initial position, the motor stops, the punch needle is against the cam pin of the punch needle driving cam, and the punch needle driving cam does not rotate under the action of the one-way bearing, so that the energy storage body keeps storing energy;

[0007] S2, pull the trigger, the motor drives the punch needle to drive the cam to rotate counterclockwise, instantly disengaging the punch needle teeth, the energy storage body is released, and the punch needle pushes the nail downward at high speed;

[0008] S3, the punch needle moves downward until the inductive optocoupler passes through the optocoupler sensing gap and enters the inductive optocoupler blocking edge. The inductive optocoupler sends a blocking signal to the control circuit, controlling the motor to stop, and the punch needle driving cam stops immediately;

[0009] S4, the clutch pawl passes over the matching notch on the punch needle, and the punch needle continues to move downward;

[0010] S5, the piston of the fixed punch begins to contact the buffer pad. At this time, the identification hole on the punch is aligned with the inductive optical coupler, causing the inductive optical coupler to send the first in-position signal to the control circuit;

[0011] S6, after the piston contacts the buffer pad, it compresses the buffer pad and continues to move downward for a distance before stopping. At this time, the punch is in the fully released position, and the identification hole passes over the inductive optocoupler, causing the inductive optocoupler to continue to be blocked by the inductive optocoupler and send a second in-position signal to the control circuit;

[0012] S7, the buffer pad rebounds and returns to the state where the piston and the buffer pad just touch each other. At this time, the identification hole is aligned with the inductive optical coupler again, causing the inductive optical coupler to send the third in-position signal to the control circuit;

[0013] S8, after the control circuit receives the third in-position signal, the control motor starts, and then starts to drive the punch needle driving cam to rotate counterclockwise, so that the cam pin starts to engage with the punch needle teeth;

[0014] S9, after the punch needle driving cam rotates counterclockwise for one circle, it disengages from the punch needle teeth. At this time, the clutch pawl is just engaged in the matching notch, locking the punch needle from moving downward;

[0015] S10, the punch needle driving cam continues to rotate counterclockwise, meshing with the punch needle teeth again, driving the punch needle to move upward until the inductive photocoupler passes through the photocoupler sensing gap and leaves the inductive photocoupler blocking edge, sending an unblocked signal to the control circuit, and the motor starts to brake and stop, transferring the punch needle driving cam to the initial position;

[0016] Assembly failure: After the nail gun is assembled, turn on the power and start the normal working process S8, S9, and S10 to return the punch to its initial position. If there is an assembly problem or a parts problem, the identification hole will not be aligned with the inductive photocoupler, that is, the control circuit does not receive the third in-position signal, the motor will not rotate, and the nail gun will not work properly. At this time, the nail gun will sound an alarm, indicating that maintenance is required;

[0017] A nail is stuck in the punch: During normal operation of the nail gun, it is interrupted in process S3 or process S4. At this time, the punch drive cam stops rotating and is completely disengaged from the punch teeth. The inductive optical coupler cannot send the subsequent complete first in-position signal, second in-position signal, and third in-position signal to the control circuit through the identification hole. The motor does not work, the punch drive cam remains stationary, and the nail gun cannot work normally. A nail jam signal is issued to indicate a nail jam.

[0018] Rebound failure: in the normal working of the nail gun, the process S6 is interrupted, at this time, the punch pin driving cam stops and completely disengages from the punch pin teeth, but after the inductive photocoupler sends the first and second in-place signals, the piston cannot rebound, the inductive photocoupler does not send the third in-place signal to the control circuit, the motor does not work, the punch pin driving cam remains not rotating, and the nail gun cannot work normally. At this time, the nail gun sends an alarm to prompt maintenance.

[0019] As a further technical solution, in the working condition of the nail sticking to the punch pin, turn off the power, take out the stuck nail, and the punch pin returns to the process S5 state. Turn on the power, start the reset mode, press the trigger, and the nail gun starts working from process S8, restores normal, and ensures that the punch pin driving cam only acts when the punch pin returns to the correct meshing position with the punch pin driving cam.

[0020] As a further technical solution, in the working condition of rebound failure, the control circuit does not send a rotating signal to the motor, and the punch pin driving cam does not rotate, avoiding the punch pin driving cam colliding with the punch pin teeth and damaging other components.

[0021] A nail gun punch pin intelligent recognition mechanism is arranged in the nail gun shell to realize the above-mentioned nail gun punch pin intelligent recognition method. The nail gun shell is fixed with a nail clamp, an assembly rack body, and an energy accumulator. The nail clamp is arranged below the assembly rack body and is used to send nails into the assembly rack body. The energy accumulator is arranged behind the assembly rack body. A motor is arranged in the nail gun shell and is used to drive the punch pin driving cam to rotate.

[0022] The punch pin is slidably arranged on the assembly rack body. The fixed end of the punch pin is fixed on the piston of the energy accumulator, and the movable end of the punch pin is slidably arranged in the assembly rack body and is used to hit the nails in the assembly rack body. The punch pin driving cam and the clutch pawl are arranged on the two sides of the punch pin. The edge of the punch pin towards the punch pin driving cam is provided with punch pin teeth. A plurality of cam pins are arranged on the punch pin driving cam. The punch pin driving cam is meshed and driven with the punch pin teeth through the cam pins, so as to drive the punch pin to slide between the initial position and the completely released position.

[0023] The edge of the punch pin towards the clutch pawl is provided with an inductive photocoupler shielding edge for selectively shielding the inductive photocoupler arranged beside the clutch pawl. The inductive photocoupler communicates and controls the motor by using the control circuit.

[0024] An optocoupler sensing notch, a matching notch and an identification hole are sequentially arranged on the inductive optocoupler shielding edge. When the optocoupler sensing notch passes through the inductive optocoupler, the inductive optocoupler sends a blocking or unblocking signal to the control circuit to control the motor to stop. The matching notch is used to fit into the clutch pawl. A left jump platform is provided on the inductive optocoupler shielding edge on the side of the matching notch close to the movable end, and a right jump platform is provided on the inductive optocoupler shielding edge on the side of the matching notch close to the fixed end, and the height of the left jump platform is greater than that of the right jump platform. When the clutch pawl leaves the left jump platform and moves toward the matching notch, the clutch pawl passes over the matching notch in an arc trajectory and falls on the right jump platform. A buffer pad is provided at the lower mouth of the energy storage body to provide rebound force to the piston. When the piston moves downward until it just contacts the buffer pad, the identification hole on the punch pin is just aligned with the inductive optocoupler.

[0025] As a further technical solution, the assembly frame includes an upper plate and a lower plate, and the punch needle is slidably arranged between the upper plate and the lower plate; a boss is provided on the upper surface of the lower plate for cooperating with a groove arranged on the lower surface of the punch needle, and the punch needle slides along the boss to achieve guidance; a nail entry hole is provided on the lower surface of the lower plate, and the nail entry hole penetrates the boss so that the nail on the top of the nail clip enters the assembly frame along the nail entry hole.

[0026] As a further technical solution, when the punch slides to the intermediate energy storage position between the initial position and the energy storage position, the cam pin of the punch driving cam just disengages from the punch teeth, and the clutch pawl just fits into the notch, thereby limiting the movement of the punch toward its active end.

[0027] As a further technical solution, the motor is connected to a driving camshaft through a gear box, and a one-way bearing is provided on the camshaft, thereby driving the punch needle to drive the cam to rotate in one direction.

[0028] As a further technical solution, the energy storage body is a spring or compressed gas.

[0029] The beneficial effects of the present invention are:

[0030] 1. An identification hole is opened on the punch pin, and three in-position signals can be continuously obtained in conjunction with the inductive optical coupler. The control circuit is then used to control the motor communication, thereby identifying four working conditions: normal operation, assembly failure, nail stuck in the punch pin, and rebound failure, and issuing corresponding alarm signals according to the working conditions;

[0031] 2. The punch drive cam will only work when the punch returns to the correct meshing position with the punch drive cam, to avoid incorrect meshing between the drive cam and the punch teeth, which may cause disordered movement or even collision, damage to parts, and thus extend the service life of the nail gun;

[0032] 3. When a nail is stuck or the wood has knots, is too hard, or contains foreign objects, the drive cam stops and completely disengages from the punch needle teeth. The punch needle no longer moves and the machine returns to normal working mode after the nail is removed, protecting the nail gun from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0034] Figure 2 It is a schematic diagram of the main structure of the present invention.

[0035] Figure 3 for Figure 2 AA cross-sectional view.

[0036] Figure 4 for Figure 2 BB cross-sectional view.

[0037] Figure 5 It is a schematic diagram of the top structure of the present invention.

[0038] Figure 6 for Figure 5 CC cross-sectional view.

[0039] Figure 7 It is a structural schematic diagram of the assembled frame body in the present invention.

[0040] Figure 8 It is a structural schematic diagram of the lower plate in the present invention.

[0041] Figure 9 It is a schematic diagram of the installation structure of the punching needle and the lower plate in the present invention.

[0042] Figure 10 It is the structural front view of the punching needle in the present invention.

[0043] Figure 11 It is a structural stereogram of the punching needle in the present invention.

[0044] Figure 12 The working process of the present invention Figure 1 (initial position).

[0045] Figure 13 The working process of the present invention Figure 2 .

[0046] Figure 14 The working process of the present invention Figure 3 .

[0047] Figure 15 The working process of the present invention Figure 4 .

[0048] Figure 16Working process of the present application Figure 5 .

[0049] Figure 17 Working process of the present application Figure 6 (completely released position).

[0050] Figure 18 Working process of the present application Figure 7 .

[0051] Figure 19 Working process of the present application Figure 8 (intermediate energy storage position).

[0052] Figure 20 Working process of the present application Figure 9 .

[0053] Figure 21 Working process of the present application Figure 10 .

[0054] BRIEF DESCRIPTION OF DRAWINGS: nail gun shell 1, nail clip 2, motor 3, gear box 4, one-way bearing 5, assembly frame body 6, nail outlet 6-1, upper plate 6-2, lower plate 6-3, boss 6-4, nail inlet 6-5, punch needle driving cam 7, inductive photocoupler 8, torsional spring 9, clutch pawl 10, punch needle 11, fixed end 11-1, movable end 11-2, punch needle tooth 11-3, inductive photocoupler blocking edge 11-4, matching notch 11-5, groove 11-6, left jump platform 11-7, right jump platform 11-8, identification hole 11-9, photocoupler sensing notch 11-10, energy storage body 12, cam shaft 13, piston 14, cam pin 15, trigger 16, buffer pad 17. DETAILED DESCRIPTION

[0055] The present application will be described in detail below with reference to the accompanying drawings:

[0056] Embodiment: As shown in the accompanying drawings, this nail gun punch needle intelligent recognition method is used to execute or recognize the following four working conditions: Figures 1 to 21

[0057] Normal operation, including the following processes:

[0058] S1, the punch needle 11 is in the initial position (as shown), at which time the motor 3 is stopped, the punch needle 11 is against the cam pin 15 of the punch needle driving cam 7, and the punch needle driving cam 7 does not rotate under the action of the one-way bearing 5, so that the energy storage body 12 remains energized; Figure 12

[0059] S2, pull the trigger 16, the motor 3 drives the punch needle driving cam 7 to rotate counterclockwise, and the punch needle tooth 11-3 is instantaneously disengaged, as shown in Figure 13 ​​At this time, the energy storage body 12 is released, and the punch pin 11 is pushed to move downward at high speed;

[0060] S3, the punch pin 11 moves downward until the inductive photocoupler 8 enters the inductive photocoupler blocking edge 11-4 after passing through the photocoupler inductive gap 11-10, as shown in the figure; Figure 14 At this time, the inductive photocoupler 8 sends a blocking signal to the control circuit, and the motor 3 stops rotating, and the punch pin driving cam 7 stops rotating immediately;

[0061] S4, as shown in the figure, the clutch pawl 10 passes through the matching gap 11-5 on the punch pin 11 along the trajectory shown by the arrow in the figure, and the punch pin 11 continues to move downward; Figure 15

[0062] S5, the piston 14 fixing the punch pin 11 begins to contact the buffer pad 17, as shown in the figure; Figure 16 At this time, the identification hole 11-9 on the punch pin 11 is just aligned with the inductive photocoupler 8, so that the inductive photocoupler 8 sends a first arrival signal to the control circuit;

[0063] S6, after the piston 14 contacts the buffer pad 17, the buffer pad 17 is compressed, and continues to move downward for a distance and then stops moving downward, at this time, the punch pin 11 is in a completely released position, as shown in the figure, the identification hole 11-9 passes through the inductive photocoupler 8, so that the inductive photocoupler 8 is continuously blocked by the inductive photocoupler blocking edge 11-4, and sends a second arrival signal to the control circuit; Figure 17

[0064] S7, the buffer pad 17 rebounds and resets to the state that the piston 14 just contacts the buffer pad 17, as shown in the figure; Figure 16 At this time, the identification hole 11-9 is aligned with the inductive photocoupler 8 again, so that the inductive photocoupler 8 sends a third arrival signal to the control circuit;

[0065] S8, after the control circuit receives the third arrival signal, the motor 3 is started, and then starts to drive the punch pin driving cam 7 to rotate counterclockwise, so that the cam pin shaft 15 begins to engage the punch pin tooth 11-3, as shown in the figure; Figure 18

[0066] S9, after the punch pin driving cam 7 rotates counterclockwise for one revolution, it is disengaged from the punch pin tooth 11-3, as shown in the figure, at this time, the clutch pawl 10 is just clamped into the matching gap 11-5, and the punch pin 11 is locked and cannot move downward; Figure 19

[0067] S10, the punch pin driving cam 7 continues to rotate counterclockwise and engages the punch pin tooth 11-3 again, as shown in the figure, the punch pin 11 is driven to move upward until the inductive photocoupler 8 passes through the photocoupler inductive gap 11-10 and leaves the inductive photocoupler blocking edge 11-4, as shown in the figure; Figure 20 Figure 21 ​​​​​As shown, the inductive coupling 8 sends an unblocked signal to the control circuit, and the motor 3 starts to brake and stop the driving cam 7 to stop the punch driving cam 7 to the initial position;

[0068] When the nail gun is normally used, the nail gun executes the cycle of S1-S10, but when various factors (stuck nails, knots, hard wood, foreign objects such as broken nails inside, or deviation, hitting hard objects such as stones) that affect the nailing effect or even damage the nail gun occur during nailing, the punch with the identification hole intelligent identification mechanism and method can intelligently identify and handle the abnormalities caused by various adverse factors, thereby protecting the nail gun from damage.

[0069] Assembly failure: after the nail gun is assembled, the power is turned on, and the processes S8, S9, and S10 under normal working conditions are started to make the punch 11 return to the initial position. If assembly problems or part problems occur, the identification hole 11-9 cannot be aligned with the inductive coupling 8, i.e., the control circuit does not receive the third arrival signal, the motor 3 does not rotate, and the nail gun cannot work normally. At this time, the nail gun sends an alarm to prompt maintenance;

[0070] Nail stuck in punch: for example, knots, hard wood, foreign objects such as broken nails inside, or deviation, hitting hard objects such as stones, which can cause the nail to not reach the bottom, etc., all of which can cause the nail to be stuck in the punch 11, which can cause the nail gun to be interrupted in the process S3 or the process S4 during normal operation. At this time, the punch driving cam 7 stops rotating and completely disengages from the punch gear 11-3, the inductive coupling 8 cannot send the subsequent complete first arrival signal, the second arrival signal, and the third arrival signal to the control circuit through the identification hole 11-9, the motor 3 does not work, the punch driving cam 7 remains stationary, the nail gun cannot work normally, and a nail sticking signal is sent to prompt the nail sticking. Preferably, in the working condition of the nail stuck in the punch, the power is turned off, the stuck nail is removed, the punch 11 returns to the process S5 state, the power is turned on, the reset mode is started, the trigger 16 is pressed, and the nail gun starts to work from the process S8 to restore normal operation, and it is ensured that the punch driving cam 7 only moves when the punch 11 returns to the correct meshing position with the punch driving cam 7.

[0071] Rebound failure: For example, the buffer pad 17 is damaged or loses its ability to rebound after compression, or the punch pin 11 is loosened or broken at the fixing point with the piston 14, causing the nail gun to be interrupted during normal operation in process S6. At this time, the punch pin drive cam 7 stops rotating and is completely disengaged from the punch pin tooth 11-3. However, after the inductive optical coupler 8 sends the first and second in-position signals, the piston 14 cannot rebound. The inductive optical coupler 8 does not send the third in-position signal to the control circuit. The motor 3 does not work, the punch pin drive cam 7 remains stationary, and the nail gun cannot work normally. At this time, the nail gun issues an alarm, indicating that maintenance is required. Preferably, under the working condition of rebound failure, the control circuit will not give the motor 3 a rotation signal, and the punch pin drive cam 7 will not rotate, so as to prevent the punch pin drive cam 7 from colliding with the punch pin tooth 11-3 and damaging other components.

[0072] Reference Attachment Figures 1 to 11 The nail gun punch pin intelligent identification mechanism for realizing the above-mentioned nail gun punch pin intelligent identification method is arranged in the nail gun housing 1, and the mechanism includes a nail gun housing 1, a nail clamp 2, a motor 3, a gear box 4, a one-way bearing 5, an assembly frame 6, a nail outlet 6-1, an upper plate 6-2, a lower plate 6-3, a boss 6-4, a nail entry port 6-5, a punch pin driving cam 7, an inductive optical coupler 8, a torsion spring 9, a clutch pawl 10, a punch pin 11, a fixed end 11-1, a movable end 11-2, a punch pin tooth 11-3, an inductive optical coupler shielding edge 11-4, a matching notch 11-5, a groove 11-6, a left jump platform 11-7, a right jump platform 11-8, an identification hole 11-9, an optical coupler sensing notch 11-10, an energy storage body 12, a camshaft 13, a piston 14, a cam pin shaft 15, a trigger 16 and a buffer pad 17.

[0073] like Figure 1 、 2 As shown, a nail clip 2, an assembly frame 6 and an energy storage body 12 are fixed to the nail gun housing 1. The nail clip 2 is arranged below the assembly frame 6 to feed nails into the assembly frame 6. The energy storage body 12 is arranged behind the assembly frame 6. Figure 2 、 3 The nail gun housing 1 is provided with a motor 3, which is triggered by the trigger 16 on the nail gun housing 1. The motor 3 is connected to the drive cam shaft 13 through the gear box 4. The cam shaft 13 is used to drive the punching needle drive cam 7 to rotate. Preferably, a one-way bearing 5 is provided on the cam shaft 13 to ensure that the punching needle drive cam 7 can only be rotated in one direction ( Figure 4 (counterclockwise).

[0074] like Figure 4 、 10As shown in FIG. 11 , a punching needle 11 is slidably arranged in the assembly frame 6. The fixed end 11-1 of the punching needle 11 is fixed to the piston 14 of the energy storage body 12. The movable end 11-2 of the punching needle 11 is slidably arranged in the assembly frame 6 to strike the nail in the assembly frame 6 so that the nail is ejected from the nail outlet 6-1 of the assembly frame 6. The punching needle driving cam 7 and the clutch pawl 10 are respectively arranged on both sides of the punching needle 11. Figure 10 、 11 , a punching needle tooth 11-3 is provided on the edge of the punching needle 11 facing the punching needle driving cam 7, and a plurality of cam pins 15 (preferably four in this embodiment) are provided on the punching needle driving cam 7. The punching needle driving cam 7 is driven by the cam pins 15 and the punching needle teeth 11-3, thereby driving the punching needle 11 in the initial position (such as Figure 12 as shown) and the fully released position (as Figure 17 The edge of the punch 11 facing the clutch pawl 10 is provided with an inductive optocoupler shielding edge 11-4, which is used to selectively shield the inductive optocoupler 8 disposed next to the clutch pawl 10. The inductive optocoupler 8 uses the control circuit to communicate and control the motor 3. The inductive optocoupler shielding edge 11-4 is sequentially provided with an optocoupler sensing notch 11-10, a matching notch 11-5, and an identification hole 11-9. When the optocoupler sensing notch 11-10 passes the inductive optocoupler 8, the inductive optocoupler 8 sends a blocking or unblocking signal to the control circuit, controlling the motor 3 to stop.

[0075] The torsion spring 9 is used to twist the clutch pawl 10 to ensure that the clutch pawl 10 always slides along the inductive photocoupler shielding edge 11-4. A matching notch 11-5 is provided on the inductive photocoupler shielding edge 11-4 to fit the clutch pawl 10. Figure 10 、 11 As shown, a left platform 11-7 is provided on the inductive photocoupler shielding edge 11-4 on the side of the matching notch 11-5 close to the movable end 11-2, and a right platform 11-8 is provided on the inductive photocoupler shielding edge 11-4 on the side of the matching notch 11-5 close to the movable end 11-2 fixed end 11-1, and the height of the left platform 11-7 is greater than that of the right platform 11-8. Figure 15 As shown, when the clutch pawl 10 leaves the left jump platform 11-7 and moves toward the matching notch 11-5, the clutch pawl 10 passes over the matching notch 11-5 in an arc trajectory and lands on the right jump platform 11-8.

[0076] like Figure 12 As shown, a buffer pad 17 is installed at the lower end of the energy storage body 12 to provide a rebound force to the piston 14. When the piston 14 moves downward to just contact the buffer pad 17, the identification hole 11-9 on the punch needle 11 is just aligned with the inductive optical coupler 8, as shown in FIG. Figure 16 shown.

[0077] Reference Attachment Figures 7-9The assembly frame 6 includes an upper plate 6-2 and a lower plate 6-3, with a punch 11 slidingly disposed between the upper and lower plates 6-2 and 6-3. The upper surface of the lower plate 6-3 is provided with a boss 6-4, which is configured to engage with a groove 11-6 disposed on the lower surface of the punch 11. The punch 11 slides along the boss 6-4 for guidance. The lower surface of the lower plate 6-3 is provided with a nail insertion opening 6-5, which penetrates the boss 6-4, allowing the nail at the top of the nail clip 2 to enter the assembly frame 6 along the nail insertion opening 6-5.

[0078] like Figure 19 As shown in FIG, when the punch pin 11 slides to the intermediate energy storage position between the initial position and the fully released position, the four cam pins 15 of the punch pin driving cam 7 are all engaged with a punch pin tooth 11-3. At this time, the last cam pin 15 of the punch pin driving cam 7 is just disengaged from the punch pin tooth 11-3, and the clutch pawl 10 is just stuck in the notch 11-5. Under the action of the notch 11-5, the punch pin 11 cannot move toward its active end 11-2 (i.e., downward). Figure 20 shown.

[0079] Reference Attachment Figure 17 When the inductive photocoupler shielding edge 11-4 completely leaves the inductive photocoupler 8, the inductive photocoupler 8 sends a signal to control the motor 3 to start braking and stopping. As a preferred technical solution, the energy storage body 12 is a spring or compressed gas.

[0080] The working process of the present invention is as follows: the motor 3 drives the punch needle to drive the cam 7 to rotate through the gear box 4, and the cam pin 15 engages with the punch needle tooth 11-3 to drive the punch needle 11 to move upward. In order to increase the linear motion stroke of the punch needle, the energy storage body 12 such as compressed gas or spring is used, and the driving cam needs to rotate two or more circles to achieve this. The punch needle cooperates with the clutch pawl 10 and the one-way bearing 5 to ensure that the punch needle moves accurately in one direction during the process of accumulating sufficient potential energy. The punch needle is designed with a punch needle tooth, a clutch pawl jump platform, and an inductive photocoupler notch. The inductive photocoupler shielding edge 11-4 and an identification hole 11-9 for auxiliary intelligent identification are provided. Before the energy storage is almost completed, the inductive photocoupler shielding edge on the punch needle rises, and the inductive photocoupler 8 passes through the photocoupler sensing notch 11-10. The inductive photocoupler senses a signal and sends a signal to the control circuit. The motor brakes and stops, and the cam pin 15 and the punch needle tooth 11-3 remain engaged. Under the action of the one-way bearing, the punch needle stops at a certain position and maintains the energy storage state. At this time, the trigger is pulled, the motor drives the driving cam to rotate, the cam pin moves forward and no longer engages with the punch needle teeth, the punch needle is released instantly, and moves downward to rush towards the nail. The inductive optocoupler enters the inductive optocoupler shielding edge 11-4 from the optocoupler sensing notch 11-10 on the punch needle. The inductive optocoupler senses the signal and sends it to the control circuit, and the motor brakes to drive the cam to stop. The punch needle continues to move downward at high speed. During the movement, the clutch pawl smoothly crosses the clutch pawl matching gap on the punch needle under the action of the punch needle clutch pawl jumper. When there are no factors that affect the nailing effect or even damage the nail gun during the nailing process (nails stuck, wood has knots, is too hard, there are foreign objects inside, such as broken nails, etc., or the nail is hit off-center, hitting hard objects such as stones), the punch needle can hit the nail into the wooden board and other objects without any obstacles. At this time, through the compression and rebound of the buffer pad, the gun needle passes through the identification hole of the auxiliary intelligent identification on it and gives three signals to the inductive optical coupler. The motor starts and drives the cam. The inductive optical coupler on the punch needle blocks the plane and rises. The inductive optical coupler enters the punch needle optical coupler sensing gap. The inductive optical coupler senses the signal to the control circuit, the motor is powered off and stops, the cam pin and the punch needle teeth remain engaged, and under the action of the one-way bearing, the punch needle stops at a certain position and maintains the energy storage state. The nail gun returns to the brake stop state and the trigger is pulled to enter the next nailing cycle. When various factors that affect the nailing effect or even damage the nail gun occur during the nailing process (nail jamming, wood with knots or too hard, foreign objects in the wood, such as broken nails, etc., or the nail is hit off-center, hitting hard objects such as stones), the inductive optocoupler cannot sense the complete three-time signal through the auxiliary intelligent identification hole on the gun needle. The nail gun will intelligently identify the number of signals sensed by the inductive optocoupler through the identification hole and give the corresponding operating mode, thereby protecting the nail gun from damage.

[0081] 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 punch pin intelligent identification method, characterized in that: Perform or identify the following four operating conditions: Normal operation includes the following processes: S1, the punching needle (11) is in the initial position, the motor (3) stops, the punching needle (11) abuts against the cam pin (15) of the punching needle driving cam (7), and the punching needle driving cam (7) does not rotate under the action of the one-way bearing (5), so that the energy storage body (12) keeps storing energy; S2, pull the trigger (16), the motor (3) drives the punch drive cam (7) to rotate counterclockwise, instantly disengaging the punch teeth (11-3), and the energy storage body (12) is released, causing the punch (11) to push the nail downward at high speed; S3, the punch needle (11) moves downward until the inductive photocoupler (8) passes through the photocoupler sensing notch (11-10) and enters the inductive photocoupler shielding edge (11-4), and the inductive photocoupler (8) sends a shielding signal to the control circuit, the control motor (3) stops, and the punch needle driving cam (7) stops immediately; S4, the clutch pawl (10) passes over the matching notch (11-5) on the punch needle (11), and the punch needle (11) continues to move downward; S5, the piston (14) of the fixed punch needle (11) begins to contact the buffer pad (17), and at this time the identification hole (11-9) on the punch needle (11) is exactly aligned with the inductive optical coupler (8), so that the inductive optical coupler (8) sends the first in-position signal to the control circuit; S6, after the piston (14) contacts the buffer pad (17), the buffer pad (17) is compressed, and the piston (14) stops moving downward after continuing to move downward for a distance. At this time, the punch needle (11) is in a fully released position, and the identification hole (11-9) passes over the inductive optical coupler (8), so that the inductive optical coupler (8) continues to be blocked by the inductive optical coupler blocking edge (11-4), and a second in-position signal is sent to the control circuit; S7, the buffer pad (17) rebounds and returns to the state where the piston (14) and the buffer pad (17) just contact each other. At this time, the identification hole (11-9) is aligned with the inductive optical coupler (8) again, so that the inductive optical coupler (8) sends a third in-position signal to the control circuit; S8, after the control circuit receives the third in-position signal, the control motor (3) starts, and then starts to drive the punch drive cam (7) to rotate counterclockwise, so that the cam pin (15) starts to engage the punch tooth (11-3); S9, after the punch needle driving cam (7) rotates counterclockwise for one circle, it disengages from the punch needle tooth (11-3), and at this time the clutch pawl (10) is just engaged with the matching notch (11-5), locking the punch needle (11) from moving downward; S10, the punch needle driving cam (7) continues to rotate counterclockwise, meshing with the punch needle teeth (11-3) again, driving the punch needle (11) to move upward until the inductive optical coupler (8) passes through the optical coupler sensing notch (11-10) and leaves the inductive optical coupler shielding edge (11-4), sending an unshielded signal to the control circuit, and the motor (3) starts braking to stop the punch needle driving cam (7) to the initial position; Assembly failure: After the nail gun is assembled, the power is turned on and the normal working process S8, S9, and S10 are executed to return the punch (11) to the initial position. If there is an assembly problem or a parts problem, the identification hole (11-9) will not be aligned with the inductive optical coupler (8), that is, the control circuit does not receive the third in-position signal, the motor (3) does not rotate, and the nail gun cannot work normally. At this time, the nail gun will sound an alarm, indicating that maintenance is required; The nail is stuck in the punch: the nail gun is working normally, but is interrupted in process S3 or process S4. At this time, the punch drive cam (7) stops rotating and is completely disengaged from the punch teeth (11-3). The inductive optical coupler (8) cannot send the subsequent complete first in-position signal, second in-position signal and third in-position signal to the control circuit through the identification hole (11-9). The motor (3) does not work, the punch drive cam (7) remains stationary, and the nail gun cannot work normally. A nail jam signal is sent to indicate a nail jam. Rebound failure: The nail gun is operating normally, but is interrupted in process S6. At this time, the punch drive cam (7) stops rotating and is completely disengaged from the punch teeth (11-3). However, after the inductive optical coupler (8) sends the first and second in-position signals, the piston (14) cannot rebound. The inductive optical coupler (8) does not send the third in-position signal to the control circuit. The motor (3) does not work, the punch drive cam (7) remains stationary, and the nail gun cannot operate normally. At this time, the nail gun issues an alarm, indicating that maintenance is required.

2. The nail gun punch pin intelligent identification method according to claim 1, characterized in that: In the working condition where the nail is stuck in the punching pin, the power is turned off and the stuck nail is removed, and the punching pin (11) returns to the process S5 state. The power is turned on, the reset mode is turned on, and the trigger (16) is pressed. The nail gun starts working from the process S8 and returns to normal, ensuring that the punching pin driving cam (7) is actuated only when the punching pin (11) returns to the correct meshing position with the punching pin driving cam (7).

3. The nail gun punch pin intelligent identification method according to claim 1, characterized in that: Under the working condition of rebound failure, the control circuit will not give the motor (3) a rotation signal, and the punch needle driving cam (7) will not rotate, thereby preventing the punch needle driving cam (7) from colliding with the punch needle teeth (11-3) and damaging other components.

4. A nail gun punch pin intelligent identification mechanism, arranged in a nail gun housing (1), for implementing the nail gun punch pin intelligent identification method according to any one of claims 1 to 3, characterized in that: The nail gun housing (1) is fixed with a nail clamp (2), an assembly frame (6) and an energy storage body (12); the nail clamp (2) is arranged below the assembly frame (6) and is used to feed nails into the assembly frame (6); the energy storage body (12) is arranged behind the assembly frame (6); a motor (3) is arranged in the nail gun housing (1) and is used to drive the punch drive cam (7) to rotate; A punching needle (11) is slidably arranged on the assembly frame (6), a fixed end (11-1) of the punching needle (11) is fixed on the piston (14) of the energy storage body (12), and a movable end (11-2) of the punching needle (11) is slidably arranged in the assembly frame (6) for striking the nail in the assembly frame (6); the punching needle driving cam (7) and the clutch pawl (10) are respectively arranged on both sides of the punching needle (11), and a punching needle tooth (11-3) is provided on the edge of the punching needle (11) facing the punching needle driving cam (7), and a plurality of cam pins (15) are provided on the punching needle driving cam (7), and the punching needle driving cam (7) is driven by meshing with the punching needle teeth (11-3) through the cam pins (15), thereby driving the punching needle (11) to slide between the initial position and the fully released position; An inductive photocoupler shielding edge (11-4) is provided at the edge of the punch needle (11) facing the clutch pawl (10), for selectively shielding the inductive photocoupler (8) provided next to the clutch pawl (10), and the inductive photocoupler (8) uses the control circuit to control the communication with the motor (3); An optocoupler sensing notch (11-10), a matching notch (11-5), and an identification hole (11-9) are sequentially provided on the inductive optocoupler shielding edge (11-4). When the optocoupler sensing notch (11-10) passes through the inductive optocoupler (8), the inductive optocoupler (8) sends a blocking or unblocking signal to the control circuit to control the motor (3) to stop. The matching notch (11-5) is used to match and engage the clutch pawl (10). A left jump platform (11-7) is provided on the inductive optocoupler shielding edge (11-4) on the side of the matching notch (11-5) close to the movable end (11-2). A left jump platform (11-7) is provided on the side of the matching notch (11-5) close to the fixed end (11-1). A right jump platform (11-8) is provided on the shielding edge (11-4) of the inductive optical coupler, and the height of the left jump platform (11-7) is greater than that of the right jump platform (11-8); when the clutch pawl (10) leaves the left jump platform (11-7) and moves toward the matching notch (11-5), the clutch pawl (10) passes over the matching notch (11-5) in an arc trajectory and falls on the right jump platform (11-8); a buffer pad (17) is provided at the lower mouth of the energy storage body (12) for providing a rebound force to the piston (14); when the piston (14) moves downward until it just contacts the buffer pad (17), the identification hole (11-9) on the punch needle (11) is just aligned with the inductive optical coupler (8).

5. The nail gun punch pin intelligent identification mechanism according to claim 4, characterized in that: The assembly frame (6) comprises an upper plate (6-2) and a lower plate (6-3), and the punching needle (11) is slidably arranged between the upper plate (6-2) and the lower plate (6-3); a boss (6-4) is provided on the upper surface of the lower plate (6-3) for cooperating with a groove (11-6) arranged on the lower surface of the punching needle (11), and the punching needle (11) slides along the boss (6-4) to achieve guidance; a nail entry hole (6-5) is provided on the lower surface of the lower plate (6-3), and the nail entry hole (6-5) penetrates the boss (6-4), so that the nail on the top of the nail clamp (2) enters the assembly frame (6) along the nail entry hole (6-5).

6. The nail gun punch pin intelligent identification mechanism according to claim 4, characterized in that: When the punching needle (11) slides to an intermediate energy storage position between the initial position and the energy storage position, the cam pin (15) of the punching needle driving cam (7) just disengages from the punching needle tooth (11-3), and the clutch pawl (10) just engages in the matching notch (11-5), thereby restricting the punching needle (11) from moving toward its movable end (11-2).

7. The nail gun punch pin intelligent identification mechanism according to claim 4, characterized in that: The motor (3) is connected to a driving camshaft (13) via a gearbox (4), and a one-way bearing (5) is sleeved on the camshaft (13), thereby driving the punching needle driving cam (7) to rotate in one direction.

8. The nail gun punch pin intelligent identification mechanism according to claim 4, characterized in that: The energy storage body (12) is a spring or compressed gas.

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