Automatic nail feeding mechanism and nail gun

Abstract

This utility model relates to an automatic nail feeding mechanism, including a nail feeding limiting component, a nail guide strip, a rear frame, and a nail pushing device. The nail guide strip is used for nail row placement and sliding. The head of the nail guide strip is provided with a nail blocking part for limiting the number of nails fed in each nail row. The nail feeding limiting component includes a spring and a protective seat. The protective seat is provided with a first opening and a nail feeding port for facilitating nail feeding. The size of the first opening is larger than the size of the nail blocking part. The nail blocking part is movably disposed in the first opening. This design can complete the reset of the blocking end with only an integrated spring component, effectively reducing the number of parts and simplifying the assembly process.

Description

Technical Field

[0001] This utility model relates to an automatic nail feeding mechanism and a nail gun. Background Technology

[0002] With the continuous improvement of automation levels in construction engineering and woodworking assembly, various pneumatic and electric nail guns have been widely used in construction sites and industrial production. One of the core components of a nail gun is the automatic nail feeding mechanism, whose main function is to sequentially, accurately, and reliably feed a row of nails stored in the nail guide bar to the gun head, ensuring that only one nail is successfully ejected each time the nail gun is triggered, thus achieving efficient and safe automatic nailing operations.

[0003] Currently, a flexible sleeve limiting nail feeding structure is widely used in common automatic nail feeding mechanisms. This structure has an elastic sleeve at the nail feeding channel with an initial height lower than the nail thickness. When a single nail passes through, it temporarily lifts the sleeve to widen the height of the nail feeding channel, allowing the nail to smoothly enter the nail feeding area. Subsequently, the sleeve automatically resets under the action of the spring force, thus returning to the height limit state below that of two nails passing through simultaneously, effectively achieving the control goal of "one nail, one feeding". Although this type of structure is reliable in function, it is usually composed of multiple parts such as the protective base, sleeve, spring, and limiting pin, making the structure complex, requiring high assembly precision, and resulting in high processing and assembly costs. In addition, during long-term operation of the nail gun, it is prone to problems such as spring fatigue and sleeve jamming due to dust, vibration, and other working conditions, which can lead to nail jamming, double nails, and missing nails, affecting the stability and service life of the entire machine.

[0004] Furthermore, in the existing technology, due to the matching of different nail sizes, guide strips of different volumes are required. Because the guide strips for small nails are small, it is impossible to install an elastic sleeve limiting nail feeding structure. Some manufacturers have eliminated the nail feeding limiting component in this type of product and instead set a fixed nail outlet structure.

[0005] While this solution effectively reduces assembly space, it lacks dynamic nail-blocking capability, which can easily lead to multiple nails entering the nail-pushing channel at the same time. This can cause problems such as nail gun jamming, firing failure, or damage to the workpiece, thus reducing the overall operational reliability of the machine. Utility Model Content

[0006] The primary objective of this invention is to provide an automatic nail feeding mechanism that is small in size, compact in structure, easy to assemble, and still has a nail-stopping function.

[0007] The second objective of this invention is to provide a nail gun that is simple and quick to repair.

[0008] The primary objective of this invention is achieved as follows:

[0009] An automatic nail feeding mechanism includes a nail feeding limiting component, a nail guide strip, a rear frame, and a nail pushing device. The nail guide strip is used for nail row placement and sliding. The head of the nail guide strip is provided with a nail blocking part for limiting the number of nails fed in each nail row.

[0010] The nail feeding limiting component includes a spring and a guard seat. The guard seat is provided with a first opening and a nail feeding port for easy nail feeding. The size of the first opening is larger than the size of the nail blocking part. The nail blocking part is movably disposed in the first opening.

[0011] The pin-blocking part includes a blocking end and a limiting block. The blocking end is disposed at the head of the guide pin strip, and the limiting block is disposed on the side wall of the blocking end.

[0012] The spring sheet is disposed on the top surface of the protective seat, the limiting block abuts against the spring sheet, the blocking end can rise and fall along the first opening, and the spring sheet constitutes the reset mechanism of the blocking end.

[0013] The tail end of the guide pin is connected to the rear tail frame;

[0014] The pusher device includes a coil spring assembly and a pusher claw for pushing the nail row to move. The upper part of the pusher claw extends toward the guide nail bar to contact the nail row. The coil spring assembly and the pusher claw are connected, and the coil spring assembly constitutes the power source for the pusher claw.

[0015] This automatic nail feeding mechanism achieves precise positioning and self-resetting of a single nail by movably positioning the nail-blocking part within the first opening of the guard seat and utilizing the cooperation of a spring and a limit block as a reset mechanism. Compared to existing structures that require a separate spring and guard assembly, this design uses only an integrated spring component to reset the blocking end, effectively reducing the number of parts and simplifying the assembly process.

[0016] The primary objective of this utility model can also be achieved by the following technical measures:

[0017] Furthermore, it also includes an arc-shaped stop bar, wherein the guide pin bar includes an arc-shaped guide pin portion and a strip-shaped guide pin portion, and the arc-shaped guide pin portion and the strip-shaped guide pin portion are connected;

[0018] One end of the arc-shaped baffle is connected to the blocking end, and the other end of the arc-shaped baffle is connected to the strip-shaped guide pin part, so that the arc-shaped baffle is fixed on the periphery of the arc-shaped guide pin part, and a nail foot blocking area is formed between the arc-shaped baffle and the arc-shaped guide pin part.

[0019] An arc-shaped stop strip is added to the arc-shaped guide pin section so that when the pin row slides to this part, the pin feet can be concealed by the area covered by the pin feet, eliminating the visual abruptness caused by exposed pin feet and improving the aesthetics and professionalism of the overall structure.

[0020] One end of the arc-shaped stop bar is connected to the blocking end, and the other end is connected to the strip-shaped guide pin. This not only ensures that the arc-shaped stop bar is firmly fixed to the periphery of the arc-shaped guide pin, but also effectively limits the downward movement of the blocking end during the downward movement of the blocking end, preventing the blocking end from falling too far and causing the pin to get stuck.

[0021] Furthermore, it also includes an adjusting plate, which is disposed on the bottom surface of the guard seat, and the limiting block abuts against the adjusting plate.

[0022] The adjustment plate set on the bottom of the guard seat precisely limits the downward travel of the blocking end, so that the initial height of the push channel through which a single nail passes can be finely adjusted according to different nail row thicknesses or usage requirements, thereby improving the adaptability and versatility of the automatic nail feeding mechanism.

[0023] The independent structure of the adjustment piece facilitates quick replacement during assembly or maintenance. Users can flexibly adjust the maximum downward distance of the blocking end according to the on-site working conditions to avoid poor nail feeding caused by nail specifications or wear of the guard seat.

[0024] By utilizing the adjustability of the adjustment plate, compensatory adjustments can be made during the use of the nail gun to address changes in the mechanical properties of the spring (such as spring fatigue or spring relaxation), thereby extending the service life of the nail feeding limiting component.

[0025] Furthermore, the rear tail frame includes a guide pin connecting part, a sliding bar connecting part, and a nail gun connecting part, wherein the tail end of the guide pin is detachably connected to the guide pin connecting part of the rear tail frame.

[0026] The detachable design of the tailstock allows users to simply detach the tailstock from the nail gun when it needs maintenance or parts replacement, without having to disassemble the entire automatic nail feeding mechanism. This greatly saves disassembly and assembly time and reduces maintenance difficulty and repair costs.

[0027] When repairing or replacing the tailstock of a nail gun, it can reduce interference with other components (such as nail feeding limiting components, sliding bars, nail guide bars, etc.), reduce human assembly errors and the risk of secondary failures, thereby improving the operational reliability and service life of the entire automatic nail feeding mechanism.

[0028] Furthermore, the guide pin strip includes a first tube, a second tube, and a barrier. The first tube and the second tube are arranged side by side, and the barrier is placed between the first tube and the second tube. The first tube, the barrier, and the second tube are welded together to form the guide pin strip. An insertion gap is formed between the tail end of the first tube, the tail end of the second tube, and the barrier.

[0029] The guide pin connecting part is a connecting post. The upper diameter of the connecting post is greater than the width of the insertion gap, the lower diameter of the connecting post is greater than the width of the insertion gap, and the middle diameter of the connecting post is smaller than the width of the insertion gap.

[0030] The pusher device also includes a sliding bar, the lower part of the pusher claw sits on the sliding bar in a sliding manner, and the connecting part of the sliding bar has an insertion port that is wider than the width of the sliding bar;

[0031] The middle part of the connecting post is placed in the insertion gap, the upper part of the connecting post abuts against the guide pin strip, and the lower part of the connecting post abuts against the guide pin strip, thereby connecting the guide pin strip and the guide pin connecting part.

[0032] The sliding bar is inserted into the socket to connect the sliding bar and the sliding bar connector.

[0033] This structure, by arranging the first and second tubes and the barrier components side by side in the guide pin strip and welding them together to form a uniform and controllable insertion gap, and by cooperating with the different diameters of the connecting column (wider at the top and bottom and narrower in the middle), enables the guide pin strip and the rear tail frame to achieve a triple engagement of "clamping-locking-limiting" during assembly: the middle part of the connecting column enters the insertion gap for positioning, and the upper and lower end faces of the connecting column abut against the first and second tubes to ensure locking, thereby obtaining good tensile and shear resistance, ensuring that the guide pin strip does not loosen under working vibration and remains in a precise position.

[0034] At the same time, the sliding bar achieves a reliable connection without additional fasteners by quickly fitting into a socket with an opening wider than its width, which greatly shortens the assembly and disassembly time.

[0035] Furthermore, the guide pin connecting part is a connecting post, the middle side wall of the connecting post has a notch, the middle diameter of the connecting post is smaller than the lower diameter of the connecting post, and the upper diameter of the connecting post is the same as the lower diameter of the connecting post.

[0036] The pusher device also includes a sliding bar, the lower part of the pusher claw sits on the sliding bar in a sliding manner, and the connecting part of the sliding bar has an insertion port that is wider than the width of the sliding bar;

[0037] The guide pin has a connecting hole near its tail end. The connecting hole includes a strip-shaped hole and a circular hole. The width of the strip-shaped hole is smaller than the lower diameter of the connecting post and larger than the middle diameter of the connecting post. The diameter of the circular hole is larger than the lower diameter of the connecting post.

[0038] The middle part of the connecting post slides through the circular hole into the strip hole, and the connecting post and the connecting hole are connected to realize the connection between the guide pin strip and the guide pin connecting part;

[0039] The sliding bar is inserted into the socket to connect the sliding bar and the sliding bar connector.

[0040] This structure utilizes the different diameter design of the connecting column, combined with the combination of the circular hole and the strip hole set at the tail end of the guide pin, so that the connecting column is first inserted through the larger diameter circular hole, and then automatically locked when it slides into the narrow strip hole. This achieves a self-locking connection of "insertion-rotation-locking", which can obtain reliable pull-out and shear strength without bolts or other additional fasteners, greatly improving assembly efficiency and structural tightness.

[0041] At the same time, the sliding bar achieves a reliable connection without additional fasteners by quickly fitting into a socket with an opening wider than its width, which greatly shortens the assembly and disassembly time.

[0042] When maintenance is required, users only need to slide the connecting column out of the strip hole and pull it away from the sliding bar to quickly disassemble and reassemble the tailstock, which significantly shortens the maintenance cycle and reduces the difficulty of operation.

[0043] Furthermore, the guide pin connecting part is a connecting post, the middle side wall of the connecting post has a notch, the middle diameter of the connecting post is smaller than the lower diameter of the connecting post, and the upper diameter of the connecting post is the same as the lower diameter of the connecting post.

[0044] The pusher device also includes a sliding bar, the lower part of the pusher claw sits on the sliding bar in a sliding manner, and the connecting part of the sliding bar has an insertion port that is wider than the width of the sliding bar;

[0045] The guide pin has a connecting hole near its tail end. The connecting hole includes a strip-shaped hole and a circular hole. The width of the strip-shaped hole is smaller than the lower diameter of the connecting post and larger than the middle diameter of the connecting post. The diameter of the circular hole is larger than the lower diameter of the connecting post.

[0046] The middle part of the connecting post slides through the circular hole into the strip hole, and the connecting post and the connecting hole are connected to realize the connection between the guide pin strip and the guide pin connecting part;

[0047] The sliding bar is inserted into the socket to connect the sliding bar and the sliding bar connector.

[0048] This structure utilizes the different diameter design of the connecting column, combined with the combination of the circular hole and the strip hole set at the tail end of the guide pin, so that the connecting column is first inserted through the larger diameter circular hole, and then automatically locked when it slides into the narrow strip hole. This achieves a self-locking connection of "insertion-rotation-locking", which can obtain reliable pull-out and shear strength without bolts or other additional fasteners, greatly improving assembly efficiency and structural tightness.

[0049] At the same time, the sliding bar achieves a reliable connection without additional fasteners by quickly fitting into a socket with an opening wider than its width, which greatly shortens the assembly and disassembly time.

[0050] When maintenance is required, users only need to slide the connecting column out of the strip hole and pull it away from the sliding bar to quickly disassemble and reassemble the tailstock, which significantly shortens the maintenance cycle and reduces the difficulty of operation.

[0051] Furthermore, the rear tail frame includes a guide pin strip connecting part, a nail gun connecting part, and a sliding bar. The guide pin strip connecting part is welded to the tail end of the sliding bar and located above the sliding bar, while the nail gun connecting part is welded to the tail end of the sliding bar and located below the sliding bar.

[0052] The guide pin connecting part includes a horizontal part and a vertical part, which are connected to form an L-shaped guide pin connecting part. The horizontal part has a bolt through hole.

[0053] A bolt seat is provided near the tail end of the guide pin strip;

[0054] The front end of the sliding bar is detachably connected to the pusher device, the lower part of the pusher claw sits on the sliding bar in a sliding manner, the bolt through hole and the bolt seat are connected, and the bolt passes through the bolt through hole to lock the bolt seat.

[0055] By placing the guide strip connector and the nail gun connector above and below the end of the sliding strip respectively, the guide strip connector and the nail gun connector are arranged in a compact and layered manner, which effectively improves the stability and space utilization of the overall structure and facilitates the coordinated assembly with the nail gun body.

[0056] By incorporating bolt through holes in the transverse section and installing screw seats at corresponding positions on the tail end of the guide pin strip, a quick and secure connection between the rear tail frame and the guide pin strip is achieved. Installation is completed simply by passing the bolt through the through hole and tightening the screw seat, simplifying the operation, significantly reducing assembly time, and improving production efficiency.

[0057] The front end of the sliding bar is detachably connected to the nail pusher, so that when the nail gun needs to be maintained, only the front end of the sliding bar needs to be disconnected from the nail pusher to easily remove the tailstock. The nail gun can be repaired without disassembling the entire automatic nail feeding mechanism, which greatly improves the flexibility and convenience of assembly and maintenance.

[0058] Furthermore, the nail gun connection has a through hole to facilitate the passage of bolts.

[0059] The structure features a through hole coaxial with the bolt hole of the inspection cover at the nail gun connection part of the rear frame, which allows the bolts to be passed through the inspection cover and the rear frame connection part in sequence and directly fastened to the gun body during installation, greatly simplifying the assembly process.

[0060] Meanwhile, the through-hole is compatible with the existing access cover's opening layout, requiring no additional modifications to the nail gun body or access cover, maintaining interchangeability with industry-standard parts. When maintaining the cylinder or internal components, users can quickly separate the tailstock from the access cover simply by removing the bolts, enabling efficient maintenance and further improving the nail gun's maintainability and reliability.

[0061] Furthermore, the guide pin strip is a stainless steel guide pin strip.

[0062] The guide pins are made of stainless steel, which significantly improves their wear resistance and corrosion resistance. This allows them to maintain a smooth and straight surface even during long-term, high-frequency sliding of the pin row, reducing frictional heat and material shedding, thereby extending their service life and reducing maintenance frequency.

[0063] The hardness and rigidity of stainless steel ensure that the guide pin strip is not easily deformed or bent when subjected to repeated impacts from the pusher claw and lateral pressure from the pin row, maintaining a precise guiding effect at all times. The sliding resistance of the pin row on the guide pin strip is further reduced, the sliding is smoother, the reliability of the pin feeding action is improved, the phenomenon of pin jamming and missing pins is greatly reduced, and the work efficiency is improved.

[0064] In addition, the self-lubricating and easy-to-clean properties of stainless steel, combined with simple daily maintenance, ensure that the guide strip maintains excellent performance for a long time, improving the stability of the overall automatic nail feeding mechanism and the user experience.

[0065] Furthermore, the coil spring assembly includes a coil spring seat, a coil spring shaft, and a coil spring. The coil spring seat is connected to the protective seat, the coil spring shaft is disposed on the coil spring seat, the coil spring is sleeved on the coil spring shaft, the coil spring is connected to the push pin claw, and the front end of the sliding bar is connected to the coil spring seat.

[0066] This coil spring assembly directly connects the coil spring seat to the nail feeding head and establishes a coil spring shaft on the coil spring seat. This allows the coil spring to smoothly extend and retract along a fixed axis after being subjected to force, ensuring that the nail pusher claw obtains a stable and controllable reset force after being pulled. The user only needs to manually pull the nail pusher claw once to store energy in the coil spring. After releasing the hand, the coil spring retracts along a predetermined axis, driving the nail pusher claw to move smoothly and push the nail row, realizing the automatic nail feeding action.

[0067] Because of its excellent axial positioning, the coil spring has a guaranteed service life and number of repeated stretching cycles, providing a longer and more stable power source for the automatic nail feeding mechanism.

[0068] The second objective of this utility model is achieved as follows:

[0069] A nail gun includes a nail pusher assembly, a gun body, an inspection cover, and a bolt. The gun body includes a clamp for clamping nails output from a guide bar into a ring shape, a gun body, and a handle. The gun body has a rear-open receiving cavity. The inspection cover has a bolt hole. The bolt passes through the bolt hole to lock the gun body and close the receiving cavity. The clamp is disposed on the gun body and located in front of the gun body. The handle is connected to the gun body.

[0070] The protective seat is locked to the gun body by bolts. The bolts pass through the through hole of the nail gun connection part and the bolt hole of the inspection cover to lock the gun body, thereby realizing the connection between the automatic nail feeding mechanism and the gun body.

[0071] The gripper includes a left gripper and a right gripper, which are hinged together. The left gripper located in front of the hinge is the left gripper, and the left gripper located behind the hinge is the left handle. The right gripper located in front of the hinge is the right gripper, and the right gripper located behind the hinge is the right handle. A clamping cavity with a specific shape is formed between the left gripper and the right gripper. A push-pin area is formed between the left handle and the right handle, and the push-pin area is connected to the clamping cavity.

[0072] The blocking end extends into the push nail area, and the bottom end of the blocking end and the bottom of the push nail area form a push nail channel. The height of the push nail channel changes with the rise and fall of the blocking end. The height change range of the push nail channel is less than the height of two nails. The nail feeding port is connected to the push nail area and is located behind the push nail channel.

[0073] The pusher assembly includes a cylinder, a piston rod, and a pusher plate. The cylinder is placed inside the receiving cavity. One end of the piston rod is connected to the cylinder in a transmission manner, and the other end of the piston rod extends out of the receiving cavity and is connected to the pusher plate. A roller for driving the gripper to move is provided at the connection between the pusher plate and the piston rod.

[0074] The roller and pusher plate are placed in the pusher plate area. When the cylinder drives the piston rod to extend, the pusher plate extends with the piston rod, allowing the pusher plate to enter the pusher plate channel and extend towards the clamping cavity. At the same time, the roller extends with the piston rod, causing the left and right handles to open, causing the left and right clamping parts to close, so that the clamping cavity closes.

[0075] When the cylinder drives the piston rod to retract, the pusher plate retracts along with the piston rod, leaving the pusher channel and moving away from the clamping cavity. At the same time, the roller retracts along with the piston rod, causing the left and right handles to close, thus opening the left and right clamping parts and opening the clamping cavity.

[0076] As the piston rod extends, the pusher plate enters the height-limiting pusher channel, reliably pushing a single nail into the clamping cavity. Simultaneously, the roller drives the left and right clamps to close synchronously, clamping the nail into a ring shape. When the piston rod retracts, the pusher plate and roller work together to reset, and the left and right clamps open, completing the opening of the nail cavity. The entire action is smooth and seamless, shortening the action cycle and ensuring efficient coordination of nail clamping, nail feeding, and reset.

[0077] The height of the push-nail channel changes dynamically with the up-and-down displacement of the blocking end, and is always less than the total height of the two nails: at the initial position, excess nails are blocked, and only one nail is allowed to pass through during the pushing process; after the nail pushes up the blocking end to overcome the elastic force of the spring, it passes through, and then the spring resets to reset the height of the push-nail channel, cutting off the passage of the second nail through the push-nail channel, thereby completely avoiding the phenomena of stacked nails, stuck nails, or missing nails, and greatly improving the reliability of nail feeding and the quality of nailing.

[0078] By designing the rear tailstock, access cover, and gun body with coaxial connection holes, and allowing bolts to pass through limiting holes to lock the rear tailstock and access cover together, users only need to remove the bolts and remove the rear tailstock and access cover when maintaining the cylinder or internal components, without having to disassemble the entire automatic nail feed assembly. This significantly shortens the maintenance cycle, reduces the difficulty of maintenance, and avoids accidental damage to components such as the nail feed limiting assembly, guide strip, and sliding strip during disassembly and assembly.

[0079] The beneficial effects of this utility model are as follows:

[0080] This utility model, an automatic nail feeding mechanism, achieves precise positioning and self-resetting of a single nail by movably placing the nail-blocking part within the first opening of the protective seat and utilizing the cooperation of a spring and a limiting block as a reset mechanism. Compared to existing structures that require a separate spring and protective sleeve assembly, this design uses only an integrated spring component to reset the blocking end, effectively reducing the number of parts and simplifying the assembly process.

[0081] This invention adds an arc-shaped stop strip to the arc-shaped guide pin section, so that when the pin row slides to this part, the pin feet can be concealed by the area covered by the pin feet, eliminating the visual abruptness caused by exposed pin feet and improving the aesthetics and professionalism of the overall structure.

[0082] In this invention, one end of the arc-shaped baffle is connected to the blocking end, and the other end is connected to the strip-shaped guide pin. This not only ensures that the arc-shaped baffle is firmly fixed to the periphery of the arc-shaped guide pin, but also effectively limits the downward movement of the blocking end during the downward movement of the blocking end, preventing the blocking end from falling too far and causing the pin to get stuck.

[0083] In this invention, an adjustment plate set on the bottom surface of the guard seat precisely limits the downward travel of the blocking end, so that the initial height of the pusher channel through which a single nail passes can be finely adjusted according to different nail row thicknesses or usage requirements, thereby improving the adaptability and versatility of the automatic nail feeding mechanism.

[0084] The detachable design of the rear frame in this invention allows users to simply detach the rear frame from the nail gun when it needs repair or parts replacement, without having to disassemble the entire automatic nail feeding mechanism. This greatly saves disassembly and assembly time and reduces maintenance difficulty and repair costs. Attached Figure Description

[0085] Figure 1 This is a schematic diagram of the automatic nail feeding mechanism in Example 1.

[0086] Figure 2 This is a partial exploded view of the automatic nail feeding mechanism of Example 1.

[0087] Figure 3 This is an exploded view of the automatic nail feeding mechanism of Example 1.

[0088] Figure 4 This is a schematic diagram of the rear tail frame of Example 1.

[0089] Figure 5 This is a schematic diagram of the nail gun in Example 1.

[0090] Figure 6 This is a top view of the nail gun in Example 1.

[0091] Figure 7 for Figure 6 AA sectional view.

[0092] Figure 8 This is a cross-sectional view (initial state) of the nail gun in Example 1.

[0093] Figure 9 This is a cross-sectional view of the nail gun in Example 1 (in the nail-pushing state).

[0094] Figure 10 This is an assembly diagram of the nail gun and rear frame for Example 1.

[0095] Figure 11 This is a schematic diagram of the rear tail frame of Example 2.

[0096] Figure 12 This is a partial schematic diagram of the automatic nail feeding mechanism in Example 2.

[0097] Figure 13 This is a schematic diagram of the rear tail frame of Example 3.

[0098] Figure 14 This is a partial schematic diagram of the automatic nail feeding mechanism in Example 3.

[0099] Figure 15 This is a front view of the automatic nail feeding mechanism in Example 3.

[0100] Figure 16 for Figure 15 BB cross-sectional view.

[0101] Figure 17 This is a schematic diagram of the nail gun in Example 4.

[0102] Figure 18 This is an assembly diagram of the nail gun and rear tail frame in Example 4.

[0103] Figure 19 This is a schematic diagram of the automatic nail feeding mechanism in Example 4.

[0104] Figure 20 This is an assembly diagram of the automatic nail feeding mechanism in Example 4.

[0105] Figure 21 This is a schematic diagram of the combination of the nail feeding restriction component and the nail guide strip in Example 4.

[0106] Figure 22 This is a schematic diagram of the rear tail frame of Example 4. Detailed Implementation

[0107] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0108] Example 1, combined with Figures 1 to 10 As shown, an automatic nail feeding mechanism includes a nail feeding limiting component 1, a nail guide strip 2, a rear tail frame 4, and a nail pushing device 5, wherein the nail row is composed of multiple nails arranged in combination;

[0109] The guide pin strip 2 is used for the placement and sliding of the nail row, and the head of the guide pin strip 2 is provided with a nail blocking part 6 for limiting the number of nails fed into the nail row each time.

[0110] The nail feeding restriction component 1 includes a spring piece 11 and a guard seat 12. The guard seat 12 is provided with a first opening 121 and a nail feeding port 80 for facilitating nail feeding. The size of the first opening 121 is larger than the size of the nail blocking part 6. The nail blocking part 6 is movably disposed in the first opening 121.

[0111] The pin-blocking part 6 includes a blocking end 61 and a limiting block 62. The blocking end 61 is disposed at the head of the guide pin strip 2, and the limiting block 62 is disposed on the side wall of the blocking end 61.

[0112] The spring piece 11 is disposed on the top surface of the protective seat 12, the limiting block 62 abuts against the spring piece 11, the blocking end 61 can rise and fall along the first opening 121, and the spring piece 11 constitutes the reset mechanism of the blocking end 61.

[0113] The tail end of the guide pin 2 is connected to the rear tail frame 4;

[0114] The pusher device 5 includes a coil spring assembly 51 and a pusher claw 52 for pushing the nail row to move. The upper part of the pusher claw 52 extends toward the guide nail bar 2 to contact the nail row. The coil spring assembly 51 and the pusher claw 52 are connected, and the coil spring assembly 51 constitutes the power source of the pusher claw 52.

[0115] Furthermore, it also includes an arc-shaped stop bar 7, wherein the guide pin bar 2 includes an arc-shaped guide pin part 21 and a strip-shaped guide pin part 22, and the arc-shaped guide pin part 21 and the strip-shaped guide pin part 22 are connected;

[0116] One end of the arc-shaped baffle 7 is connected to the blocking end 61, and the other end of the arc-shaped baffle 7 is connected to the strip-shaped guide pin part 22, so that the arc-shaped baffle 7 is fixed around the arc-shaped guide pin part 21, and a nail foot blocking area 23 is formed between the arc-shaped baffle 7 and the arc-shaped guide pin part 21.

[0117] Furthermore, it also includes an adjustment piece 8, which is disposed on the bottom surface of the protective seat 12, and the limiting block 62 abuts against the adjustment piece 8.

[0118] Furthermore, the rear tail frame 4 includes a guide pin connecting part, a sliding bar connecting part 42, and a nail gun connecting part 43. The tail end of the guide pin 2 is detachably connected to the guide pin connecting part of the rear tail frame 4, and the tail end of the sliding bar 3 is detachably connected to the sliding bar connecting part 42 of the rear tail frame 4.

[0119] Furthermore, the guide pin connecting part is a connecting post 41, the middle part 412 of the connecting post 41 has a notch 4122 on its side wall, the diameter of the middle part 412 of the connecting post 41 is smaller than the diameter of the lower part of the connecting post 41, and the diameter of the upper part 411 of the connecting post 41 is the same as the diameter of the lower part 413 of the connecting post 41.

[0120] The pusher device 5 also includes a sliding bar 3, the lower part of the pusher claw 52 is slidably seated on the sliding bar 3, and the sliding bar connecting part 42 has an insertion slot 421 that is wider than the sliding bar 3.

[0121] The guide pin 2 has a connecting hole 9 near its tail end. The connecting hole 9 includes a strip-shaped hole 91 and a circular hole 92. The width of the strip-shaped hole 91 is smaller than the diameter of the lower part 413 of the connecting post 41 and larger than the diameter of the middle part 412 of the connecting post 41. The diameter of the circular hole 92 is larger than the diameter of the lower part 413 of the connecting post 41.

[0122] The middle part 412 of the connecting post 41 passes through the circular hole 92 and slides into the strip hole 91. The connecting post 41 and the connecting hole 9 are connected to realize the connection between the guide pin strip 2 and the guide pin connecting part.

[0123] The sliding bar 3 is inserted into the socket 421 to connect the sliding bar 3 and the sliding bar connecting part 42.

[0124] Furthermore, the nail gun connection part 43 has a through hole 431 to facilitate the passage of the bolt 40.

[0125] Furthermore, the guide pin strip 2 is a stainless steel guide pin strip.

[0126] Furthermore, the coil spring assembly 51 includes a coil spring seat 511, a coil spring shaft 512, and a coil spring 513. The coil spring seat 511 is connected to the guard seat 12, the coil spring shaft 512 is disposed on the coil spring seat 511, the coil spring 513 is sleeved on the coil spring shaft 512, the coil spring 513 is connected to the push pin claw 52, ​​and the front end of the sliding bar 3 is connected to the coil spring seat 511.

[0127] A nail gun includes a nail pusher assembly 10, a gun body 20, an inspection cover 30, and a bolt 40. The gun body 20 includes a clamping claw 201 for clamping nails output from a nail guide bar 2 into a ring shape, a gun body 202, and a handle 203. The gun body 202 is provided with a rear-open receiving cavity 2021. The inspection cover 30 is provided with a bolt hole 301. The bolt 40 passes through the bolt hole 301, locks onto the gun body 202, and closes the receiving cavity 2021. The clamping claw 201 is disposed on the gun body 20 and located in front of the gun body 202. The handle 203 is connected to the gun body 202.

[0128] The protective seat is locked to the gun body 20 by bolts 40. The bolts 40 pass through the through hole 431 of the nail gun connection part 43 and the bolt hole 301 of the inspection cover 30 to lock the gun body 202, thereby realizing the connection between the automatic nail feeding mechanism and the gun body 20.

[0129] The gripper 201 includes a left gripper and a right gripper, which are hinged together. The left gripper located in front of the hinge is the left gripper, and the left gripper located behind the hinge is the left handle. The right gripper located in front of the hinge is the right gripper, and the right gripper located behind the hinge is the right handle. A nail-clamping cavity 50 with a specific shape variation is formed between the left gripper and the right gripper. A nail-pushing area 60 is formed between the left handle and the right handle. The nail-pushing area 60 is connected to the nail-clamping cavity 50.

[0130] The blocking end 61 extends into the nail-pushing area 60. The bottom end of the blocking end 61 and the bottom of the nail-pushing area 60 form a nail-pushing channel 70. The height of the nail-pushing channel 70 changes with the rise and fall of the blocking end 61. The height change range of the nail-pushing channel 70 is less than the height of two nails. The nail-feeding port 80 is connected to the nail-pushing area 60 and is located behind the nail-pushing channel 70.

[0131] The pusher assembly 10 includes a cylinder 101, a piston rod 102, and a pusher plate 103. The cylinder 101 is placed in the receiving cavity 2021. One end of the piston rod 102 is connected to the cylinder 101 in a transmission manner, and the other end of the piston rod 102 extends out of the receiving cavity 2021 and is connected to the pusher plate 103. Moreover, a roller 104 for driving the gripper 201 to move is provided at the connection between the pusher plate 103 and the piston rod 102.

[0132] The roller 104 and the pusher plate 103 are placed in the pusher area 60. When the cylinder 101 drives the piston rod 102 to extend, the pusher plate 103 extends with the piston rod 102, causing the pusher plate 103 to enter the pusher channel 70 and extend towards the clamping cavity 50. At the same time, the roller 104 extends with the piston rod 102, causing the left and right handles to open, causing the left and right clamps to close, so that the clamping cavity 50 closes.

[0133] When the cylinder 101 drives the piston rod 102 to retract, the pusher plate 103 retracts along with the piston rod 102. The pusher plate 103 leaves the pusher channel 70 and moves away from the clamping cavity 50. At the same time, the roller 104 retracts along with the piston rod 102, causing the left and right handles to close, so that the left and right clamps open, thereby opening the clamping cavity 50.

[0134] Automatic nail feeding principle

[0135] The user first places the nails on the guide strip 2, then pulls the pusher claw 52 to press against the end of the nails, storing energy in the coil spring assembly 51. When the user releases the hand, the coil spring 513 releases the tension, and the pusher claw 52 moves forward along the slide bar 3, moving the entire nails forward by one nail pitch, thus continuously completing the continuous and stable automatic nail feeding action.

[0136] Push nail limiting principle

[0137] Initially, the blocking end 61 moves downward under the action of gravity. At this time, the height of the pusher channel 70 is less than the height of a single nail. Under the thrust of the cylinder 101, the single nail pushes up the blocking end 61 and passes smoothly through the pusher channel 70. After the nail passes through, the spring piece 11 resets the blocking end 61, and the pusher channel 70 returns to a state where the height is less than that of a single nail. Moreover, the maximum height of the pusher channel 70 is less than the height of two nails, which effectively prevents nail stacking, nail merging, or missing nails, ensuring that only one nail is fed out each time.

[0138] How a nail gun works:

[0139] When the user starts the nail gun, the cylinder 101 drives the piston rod 102 to extend, and the nail pusher 103 pushes a single nail through the nail pusher channel 70 into the clamping chamber. At the same time, the roller 104 connected to the piston rod 102 drives the left and right handles to open, so that the left and right clamps close at the front end of the hinge. The left and right clamps apply radial compressive force to the nail, bending the nail into a ring shape. Then the cylinder 101 retracts, the nail pusher 103 retracts, the roller 104 drives the left and right handles to reset and open, and the left and right clamps open, completing the nail's formation and release into a ring shape.

[0140] Quickly remove the rear tailstock 4 and the inspection cover 30 for cylinder 101 repair:

[0141] When maintenance is required on the cylinder 101 inside the gun body 20, the user only needs to remove the bolt 40 that passes through the through hole 431 of the nail gun connection part 43 between the inspection cover 30 and the tailstock 4, so that the nail gun connection part 43 and the gun body 20 are separated. Then the user moves the tailstock 4 to separate the nail gun connection part from the guide strip 2 and the sliding strip connection part 42 from the sliding strip 3, so that the tailstock 4 can be removed. Then the user removes the inspection cover 30 to expose the cylinder 101 assembly inside the receiving cavity 2021. After the maintenance is completed, the cylinder 101 assembly is reassembled in reverse order. There is no need to disassemble the guide strip 2, the sliding strip 3 or the pusher assembly 10, which greatly simplifies the maintenance process.

[0142] Example 2, combined with Figures 11 to 12 As shown, the difference between Example 2 and Example 1 is that:

[0143] Furthermore, the guide pin connecting part is a connecting post 41, and the diameter of the upper part 411 and the lower part 413 of the connecting post 41 are both larger than the diameter of the middle part 412 of the connecting post 41.

[0144] The pusher device 5 also includes a sliding bar 3, the lower part of the pusher claw 52 is slidably seated on the sliding bar 3, and the sliding bar connecting part 42 has an insertion slot 421 that is wider than the sliding bar 3.

[0145] The guide pin 2 has a connecting hole 9 near its tail end. The connecting hole 9 includes a strip-shaped hole 91 and a circular hole 92. The width of the strip-shaped hole 91 is smaller than the diameter of the lower part 413 of the connecting post 41 and larger than the diameter of the middle part 412 of the connecting post 41. The diameter of the circular hole 92 is larger than the diameter of the lower part 413 of the connecting post 41.

[0146] The middle part 412 of the connecting post 41 passes through the circular hole 92 and slides into the strip hole 91. The connecting post 41 and the connecting hole 9 are connected to realize the connection between the guide pin strip 2 and the guide pin connecting part.

[0147] The sliding bar 3 is inserted into the socket 421 to connect the sliding bar 3 and the sliding bar connecting part 42;

[0148] The guide pin 2 is a hollow stainless steel guide pin, and the connecting hole 910 is opened on the top surface of the guide pin 2 near its tail end.

[0149] Example 3, combined with Figures 13 to 16 As shown, the difference between Example 3 and Example 1 is that:

[0150] Furthermore, the guide pin strip 2 includes a first tube 401, a second tube 402, and a barrier 403. The first tube 401 and the second tube 402 are arranged side by side, and the barrier 403 is placed between the first tube 401 and the second tube 402. The first tube 401, the barrier 403, and the second tube 402 are welded together to form the guide pin strip 2. The tail end of the first tube 401, the tail end of the second tube 402, and the barrier 403 form an insertion gap 404.

[0151] The guide pin strip connecting part is a connecting post 41. The upper part 411 of the connecting post 41 has a diameter greater than the width of the insertion gap 404, the lower part 413 of the connecting post 41 has a diameter greater than the width of the insertion gap 404, and the middle part 412 of the connecting post 41 has a diameter smaller than the width of the insertion gap 404.

[0152] The pusher device 5 also includes a sliding bar 3, the lower part of the pusher claw 52 is slidably seated on the sliding bar 3, and the sliding bar connecting part 42 has an insertion slot 421 that is wider than the sliding bar 3.

[0153] The middle part 412 of the connecting post 41 is placed in the insertion gap 404, the upper part 411 of the connecting post 41 abuts against the guide pin strip 2, and the lower part 413 of the connecting post 41 abuts against the guide pin strip 2, thereby connecting the guide pin strip 2 and the guide pin connecting part.

[0154] The sliding bar 3 is inserted into the socket 421 to connect the sliding bar 3 and the sliding bar connecting part 42.

[0155] Example 4, combined with Figures 17 to 22 As shown, the difference between Example 4 and Example 1 is:

[0156] Furthermore, the rear tail frame 4 includes a guide pin strip connecting part, a nail gun connecting part 43 and a sliding bar 3. The guide pin strip connecting part is welded to the tail end of the sliding bar 3 and is located above the sliding bar 3. The nail gun connecting part 43 is welded to the tail end of the sliding bar 3 and is located below the sliding bar 3.

[0157] The guide pin strip connecting part includes a horizontal part 400 and a vertical part 500, which are connected to form an L-shaped guide pin strip connecting part. The horizontal part 400 has a bolt through hole 600.

[0158] The guide pin 2 is provided with a bolt seat 200 near its tail end;

[0159] The front end of the sliding bar 3 is detachably connected to the spring seat 511 of the pusher 5. The lower part of the pusher claw 52 sits on the sliding bar 3 in a sliding manner. The bolt through hole 600 and the bolt seat 200 are connected. The bolt 40 passes through the bolt through hole 600 to lock the bolt seat 200.

Claims

1. An automatic nail feeding mechanism, comprising a nail feeding limiting component, a nail guide strip, a rear tail frame, and a nail pushing device, characterized in that: The guide strip is used for the placement and sliding of the nail row, and the head of the guide strip is provided with a nail-blocking part for limiting the number of nails fed into the nail row each time. The nail feeding limiting component includes a spring and a guard seat. The guard seat is provided with a first opening and a nail feeding port for easy nail feeding. The size of the first opening is larger than the size of the nail blocking part. The nail blocking part is movably disposed in the first opening. The pin-blocking part includes a blocking end and a limiting block. The blocking end is disposed at the head of the guide pin strip, and the limiting block is disposed on the side wall of the blocking end. The spring sheet is disposed on the top surface of the protective seat, the limiting block abuts against the spring sheet, the blocking end can rise and fall along the first opening, and the spring sheet constitutes the reset mechanism of the blocking end. The tail end of the guide pin is connected to the rear tail frame; The pusher device includes a coil spring assembly and a pusher claw for pushing the nail row to move. The upper part of the pusher claw extends toward the guide nail bar to contact the nail row. The coil spring assembly and the pusher claw are connected, and the coil spring assembly constitutes the power source for the pusher claw.

2. The automatic nail feeding mechanism according to claim 1, characterized in that: It also includes an arc-shaped stop bar, wherein the guide pin bar includes an arc-shaped guide pin part and a strip-shaped guide pin part, and the arc-shaped guide pin part and the strip-shaped guide pin part are connected; One end of the arc-shaped baffle is connected to the blocking end, and the other end of the arc-shaped baffle is connected to the strip-shaped guide pin part, so that the arc-shaped baffle is fixed on the periphery of the arc-shaped guide pin part, and a nail foot blocking area is formed between the arc-shaped baffle and the arc-shaped guide pin part.

3. The automatic nail feeding mechanism according to claim 1, characterized in that: It also includes an adjusting plate, which is disposed on the bottom surface of the guard seat, and the limiting block abuts against the adjusting plate.

4. The automatic nail feeding mechanism according to claim 1, characterized in that: The rear tail frame includes a guide pin connecting part, a sliding bar connecting part, and a nail gun connecting part, wherein the tail end of the guide pin is detachably connected to the guide pin connecting part of the rear tail frame.

5. The automatic nail feeding mechanism according to claim 4, characterized in that: The guide pin strip includes a first tube, a second tube, and a barrier. The first tube and the second tube are arranged side by side, and the barrier is placed between the first tube and the second tube. The first tube, the barrier, and the second tube are welded together to form the guide pin strip. An insertion gap is formed between the tail end of the first tube, the tail end of the second tube, and the barrier. The guide pin connecting part is a connecting post. The upper diameter of the connecting post is greater than the width of the insertion gap, the lower diameter of the connecting post is greater than the width of the insertion gap, and the middle diameter of the connecting post is smaller than the width of the insertion gap. The pusher device also includes a sliding bar, the lower part of the pusher claw sits on the sliding bar in a sliding manner, and the connecting part of the sliding bar has an insertion port that is wider than the width of the sliding bar; The middle part of the connecting post is placed in the insertion gap, the upper part of the connecting post abuts against the guide pin strip, and the lower part of the connecting post abuts against the guide pin strip, thereby connecting the guide pin strip and the guide pin connecting part. The sliding bar is inserted into the socket to connect the sliding bar and the sliding bar connector.

6. The automatic nail feeding mechanism according to claim 4, characterized in that: The guide pin strip connecting part is a connecting post, and the upper diameter and lower diameter of the connecting post are both larger than the middle diameter of the connecting post; The pusher device also includes a sliding bar, the lower part of the pusher claw sits on the sliding bar in a sliding manner, and the connecting part of the sliding bar has an insertion port that is wider than the width of the sliding bar; The guide pin has a connecting hole near its tail end. The connecting hole includes a strip-shaped hole and a circular hole. The width of the strip-shaped hole is smaller than the lower diameter of the connecting post and larger than the middle diameter of the connecting post. The diameter of the circular hole is larger than the lower diameter of the connecting post. The middle part of the connecting post slides through the circular hole into the strip hole, and the connecting post and the connecting hole are connected to realize the connection between the guide pin strip and the guide pin connecting part; The sliding bar is inserted into the socket to connect the sliding bar and the sliding bar connector.

7. The automatic nail feeding mechanism according to claim 4, characterized in that: The guide pin connecting part is a connecting post, the middle side wall of the connecting post has a notch, the middle diameter of the connecting post is smaller than the lower diameter of the connecting post, and the upper diameter of the connecting post is the same as the lower diameter of the connecting post. The pusher device also includes a sliding bar, the lower part of the pusher claw sits on the sliding bar in a sliding manner, and the connecting part of the sliding bar has an insertion port that is wider than the width of the sliding bar; The guide pin has a connecting hole near its tail end. The connecting hole includes a strip-shaped hole and a circular hole. The width of the strip-shaped hole is smaller than the lower diameter of the connecting post and larger than the middle diameter of the connecting post. The diameter of the circular hole is larger than the lower diameter of the connecting post. The middle part of the connecting post slides through the circular hole into the strip hole, and the connecting post and the connecting hole are connected to realize the connection between the guide pin strip and the guide pin connecting part; The sliding bar is inserted into the socket to connect the sliding bar and the sliding bar connector.

8. The automatic nail feeding mechanism according to claim 1, characterized in that: The rear tail frame includes a guide pin strip connecting part, a nail gun connecting part, and a sliding bar. The guide pin strip connecting part is welded to the tail end of the sliding bar and located above the sliding bar, while the nail gun connecting part is welded to the tail end of the sliding bar and located below the sliding bar. The guide pin connecting part includes a horizontal part and a vertical part, which are connected to form an L-shaped guide pin connecting part. The horizontal part has a bolt through hole. A bolt seat is provided near the tail end of the guide pin strip; The front end of the sliding bar is detachably connected to the pusher device, the lower part of the pusher claw sits on the sliding bar in a sliding manner, the bolt through hole and the bolt seat are connected, and the bolt passes through the bolt through hole to lock the bolt seat.

9. The automatic nail feeding mechanism according to any one of claims 4-8, characterized in that: The nail gun connection has a through hole to facilitate the passage of bolts.

10. The automatic nail feeding mechanism according to any one of claims 5-8, characterized in that: The coil spring assembly includes a coil spring seat, a coil spring shaft, and a coil spring. The coil spring seat is connected to a protective seat, the coil spring shaft is mounted on the coil spring seat, the coil spring is sleeved on the coil spring shaft, the coil spring is connected to a push pin claw, and the front end of the sliding bar is connected to the coil spring seat.

11. A nail gun comprising the automatic nail feeding mechanism as described in claim 9, characterized in that: The device includes a pusher assembly, a gun body, an inspection cover, and bolts. The gun body includes a clamp for clamping the nails output from the guide rod into a ring shape, a gun body, and a handle. The gun body has a rear-open receiving cavity. The inspection cover has bolt holes. The bolts pass through the bolt holes to lock the gun body and close the receiving cavity. The clamps are disposed on the gun body and located in front of the gun body. The handle is connected to the gun body. The protective seat is locked to the gun body by bolts. The bolts pass through the through hole of the nail gun connection part and the bolt hole of the inspection cover to lock the gun body, thereby realizing the connection between the automatic nail feeding mechanism and the gun body. The gripper includes a left gripper and a right gripper, which are hinged together. The left gripper located in front of the hinge is the left gripper, and the left gripper located behind the hinge is the left handle. The right gripper located in front of the hinge is the right gripper, and the right gripper located behind the hinge is the right handle. A clamping cavity with a specific shape is formed between the left gripper and the right gripper. A push-pin area is formed between the left handle and the right handle, and the push-pin area is connected to the clamping cavity. The blocking end extends into the push nail area, and the bottom end of the blocking end and the bottom of the push nail area form a push nail channel. The height of the push nail channel changes with the rise and fall of the blocking end. The height change range of the push nail channel is less than the height of two nails. The nail feeding port is connected to the push nail area and is located behind the push nail channel. The pusher assembly includes a cylinder, a piston rod, and a pusher plate. The cylinder is placed inside the receiving cavity. One end of the piston rod is connected to the cylinder in a transmission manner, and the other end of the piston rod extends out of the receiving cavity and is connected to the pusher plate. A roller for driving the gripper to move is provided at the connection between the pusher plate and the piston rod. The roller and pusher plate are placed in the pusher plate area. When the cylinder drives the piston rod to extend, the pusher plate extends with the piston rod, allowing the pusher plate to enter the pusher plate channel and extend towards the clamping cavity. At the same time, the roller extends with the piston rod, causing the left and right handles to open, causing the left and right clamping parts to close, so that the clamping cavity closes. When the cylinder drives the piston rod to retract, the pusher plate retracts along with the piston rod, leaving the pusher channel and moving away from the clamping cavity. At the same time, the roller retracts along with the piston rod, causing the left and right handles to close, thus opening the left and right clamping parts and opening the clamping cavity.

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