A pneumatic nailer

Abstract

The application relates to the technical field of pneumatic tools, in particular to a pneumatic nailing machine which comprises a driving assembly, a firing assembly and a nail feeding assembly. The driving assembly is connected with the firing assembly through a gas path channel, an embedded gas path control valve is arranged in the side wall of a cylinder, a push nail mechanism is linked with a firing pin through a connecting rod, a sealing ring is arranged on the inner wall of a guide sleeve, a convex part is arranged on the top of a push plate and cooperates with an elastic piece, and the length of the connecting rod is adjustable. The application can optimize the structural layout, reduce the volume, improve the cooperation precision of the firing pin and the nail feeding mechanism, avoid the phenomenon that nails are stuck or not in place, meanwhile, the gas path sealing performance is enhanced, dust and impurities are prevented from affecting, and the equipment stability and service life are remarkably improved.

Description

Technical Field

[0001] This utility model belongs to the field of pneumatic tool technology, specifically a pneumatic nailing machine. Background Technology

[0002] In the construction and furniture manufacturing industries, pneumatic nail drivers are widely used as efficient fastening tools for joining materials such as wood, metal, and plastics. Most pneumatic nail drivers on the market currently use compressed air to drive a piston, thus achieving rapid nail firing. However, these devices often have limitations in their mechanical design. For example, the layout of the transmission components is not compact enough, resulting in a large overall size that is inconvenient to carry and operate. Furthermore, the matching precision between the firing pin and the nail feeding mechanism in existing devices is low, which can easily lead to nail jamming or incomplete nail feeding after prolonged use, affecting work efficiency.

[0003] For example, some pneumatic nail machines employ complex linkage structures to achieve the reciprocating motion of the striking pin. This design not only increases the number of parts but also places higher demands on machining precision, thereby increasing the manufacturing cost of the equipment. Meanwhile, the air control valves in traditional equipment are usually located externally to the machine body. While this facilitates maintenance, it makes them susceptible to external dust and impurities, leading to air circuit blockage or seal failure, thus shortening the equipment's lifespan. These issues indicate that there is still room for improvement in the structural optimization and functional stability of existing pneumatic nail machines.

[0004] Therefore, we made improvements and proposed a pneumatic nailing machine. Utility Model Content

[0005] The purpose of this utility model is to solve the problems of the current pneumatic nail machine's transmission components not being compact enough, its overall size being large and inconvenient to carry and operate, and to improve the phenomenon of nail jamming or incomplete nail delivery caused by the low precision of the engagement between the striking pin and the nail feeding mechanism. It also optimizes the technical defects of the air circuit control valve being easily affected by external dust and impurities, which can lead to air circuit blockage or sealing failure.

[0006] To achieve the aforementioned objectives and address the aforementioned problems, this utility model provides a pneumatic nailing machine, comprising a drive assembly, a firing assembly, and a nail feeding assembly. The drive assembly is connected to the firing assembly via an air passage. The firing assembly is located on one side of the nail feeding assembly. The drive assembly includes a cylinder and a piston rod. A piston is located inside the cylinder. One end of the piston rod is fixedly connected to the piston, and the other end extends to the outside of the cylinder and is connected to the firing assembly. The nail feeding assembly includes a nail magazine and a nail pushing mechanism. The nail pushing mechanism is located at the bottom of the nail magazine and is linked to the firing assembly via a connecting rod. A built-in air passage control valve is located at the inlet of the air passage and is embedded in the side wall of the cylinder.

[0007] The firing assembly includes a firing pin and a guide sleeve. One end of the firing pin is fixedly connected to the piston rod, and the other end passes through the guide sleeve and extends to the outlet of the nail feeding assembly. The inner wall of the guide sleeve is provided with multiple annular grooves, and a sealing ring is embedded in the annular groove. The sealing ring fits against the outer wall of the firing pin. The outer wall of the guide sleeve is provided with threads, and the guide sleeve is connected to the housing of the nail feeding assembly through the threads.

[0008] As a preferred technical solution of this application, the pusher mechanism includes a pusher plate and an elastic element. The pusher plate is slidably connected to the bottom of the nail box. One end of the elastic element is fixedly connected to the pusher plate, and the other end is fixedly connected to the inner wall of the nail box. The top of the pusher plate is provided with a plurality of protrusions, and the protrusions contact the nails in the nail box.

[0009] As a preferred technical solution of this application, one end of the connecting rod is rotatably connected to the push plate via a hinge shaft, and the other end is fixedly connected to the middle of the firing pin. The length of the connecting rod is adjustable, and the adjustment range of the connecting rod is 5mm to 15mm.

[0010] As a preferred technical solution of this application, the built-in air circuit control valve includes a valve body and a valve core. The valve body has an internal vent hole. The valve core is slidably connected to the valve body. One end of the valve core is provided with a spring. The other end of the spring is fixedly connected to the inner wall of the valve body. The other end of the valve core is provided with a sealing gasket. The sealing gasket fits into the port of the vent hole.

[0011] As a preferred technical solution of this application, the side wall of the cylinder is provided with a mounting groove, the inside of the mounting groove is provided with a positioning pin, one end of the positioning pin is fixedly connected to the valve body, the other end extends to the outside of the cylinder, and the outer wall of the positioning pin is provided with anti-slip texture.

[0012] As a preferred technical solution of this application, the top of the nail box is provided with a nail inlet, the inner wall of the nail inlet is provided with a guide slope, the guide slope is connected to the inner cavity of the nail box, and the outer side of the nail inlet is provided with a cover plate, which is connected to the nail box by a buckle.

[0013] As a preferred technical solution of this application, the bottom of the cylinder is provided with a shock-absorbing pad, the thickness of the shock-absorbing pad is 3mm to 8mm, and the material of the shock-absorbing pad is rubber or silicone.

[0014] Compared with existing technologies, the beneficial effects of this utility model are as follows: By designing the pneumatic control valve as a built-in structure and embedding it within the cylinder sidewall, the problem of dust and impurities affecting the pneumatic control valve located outside the machine body in traditional equipment is avoided. This also reduces the size of the equipment, making the overall structure more compact, easier to carry, and easier to operate. By incorporating elastic elements and protrusions in the nail-pushing mechanism, the stability and accuracy of the nail-pushing process are improved, effectively preventing nail jamming or incomplete nail delivery. The linkage design between the connecting rod and the firing pin, along with the adjustable length of the connecting rod, further improves the coordination accuracy between the firing pin and the nail-feeding mechanism, ensuring the reliability of the firing process. Furthermore, the sealing ring design on the inner wall of the guide sleeve enhances the sealing performance during firing pin movement, preventing gas leakage and extending the service life of the equipment. Through the above-mentioned specific technical means, this utility model solves the shortcomings of existing pneumatic nail machines in terms of structural optimization and functional stability, demonstrating significant technological progress and practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model. Figure 2 This is a cross-sectional view of the assembly structure of the cylinder and the built-in air circuit control valve of this utility model. Figure 3 This is a partially enlarged view of the connection structure between the firing assembly and the nail feeding assembly of this utility model. Figure 4 This is a schematic diagram of the push-pin mechanism and connecting rod cooperation structure of this utility model. Figure 5 This is a cross-sectional view of the guide sleeve and firing pin assembly structure of this utility model.

[0016] The attached diagram is labeled as follows: 1. Cylinder; 2. Piston rod; 3. Strike pin; 4. Guide sleeve; 5. Spike box; 6. Push plate; 7. Elastic element; 8. Connecting rod; 9. Built-in air circuit control valve; 10. Shock-absorbing pad. Detailed Implementation

[0017] A specific embodiment of the pneumatic nailing machine of this utility model is described in conjunction with the appendix. Figure 1 To be continued Figure 5 Please provide a detailed explanation. For example... Figure 1 As shown, the overall structure includes a cylinder 1, piston rod 2, firing pin 3, guide sleeve 4, nail magazine 5, push plate 6, elastic element 7, connecting rod 8, built-in air circuit control valve 9, and shock-absorbing pad 10. These components achieve a compact size design and efficient nail feeding and firing functions through reasonable layout and connection.

[0018] Cylinder 1 is the core component of the drive assembly. It contains a piston, which is fixedly connected to one end of piston rod 2. The other end of piston rod 2 extends outside cylinder 1 and is fixedly connected to striker 3. This direct mechanical connection ensures that piston movement is efficiently transmitted to striker 3. An internal pneumatic control valve 9 is embedded in the side wall of cylinder 1. The specific structure of this internal pneumatic control valve 9 is as follows... Figure 2 As shown, the valve body has a vent hole inside, and the valve core is slidably connected to the valve body. One end of the valve core has a spring, and the other end has a sealing gasket, which fits into the port of the vent hole. When gas enters cylinder 1, the gas pressure pushes the valve core against the spring force, thereby opening the vent hole and allowing gas to flow to the piston side, pushing the piston to move. This built-in design avoids the problem of traditional air circuit control valves being easily affected by dust and impurities when located outside the machine body, while also reducing the overall size of the equipment.

[0019] One end of the firing pin 3 is fixedly connected to the piston rod 2, and the other end passes through the guide sleeve 4 and extends to the outlet of the feeding assembly. The inner wall of the guide sleeve 4 has multiple annular grooves, each containing a sealing ring. The sealing rings fit tightly against the outer wall of the firing pin 3. Figure 5 As shown. This sealing design effectively prevents gas leakage and improves the stability of the firing pin 3 during its movement. The outer wall of the guide sleeve 4 is threaded, and it is connected to the housing of the nail feeding assembly via the threads, facilitating installation and disassembly. The middle part of the firing pin 3 is fixedly connected to one end of the connecting rod 8, and the other end of the connecting rod 8 is rotatably connected to the push plate 6 via a hinge shaft. The length of the connecting rod 8 is adjustable, with an adjustment range of 5mm to 15mm. By adjusting the length of the connecting rod 8, the matching accuracy between the firing pin 3 and the nail feeding mechanism can be optimized, ensuring the reliability of the firing process.

[0020] The nail magazine 5 is located on one side of the nail feeding assembly and contains a nail pushing mechanism. The nail pushing mechanism includes a push plate 6 and an elastic element 7. The push plate 6 is slidably connected to the bottom of the nail magazine 5, and one end of the elastic element 7 is fixedly connected to the push plate 6, while the other end is fixedly connected to the inner wall of the nail magazine 5. The top of the push plate 6 has multiple protrusions that contact the nails inside the nail magazine 5. Figure 4 As shown, after the firing pin 3 completes one firing, the connecting rod 8 drives the push plate 6 to move upward, compressing the elastic element 7. The push plate 6 then pushes the nail upward to the designated position, preparing for the next firing. This design improves the stability and accuracy of the nail-pushing process, avoiding nail jamming or incomplete nail feeding.

[0021] The top of the nail magazine 5 has a nail inlet, and the inner wall of the nail inlet has a guide slope that communicates with the inner cavity of the nail magazine 5. A cover plate is provided on the outer side of the nail inlet, and the cover plate is connected to the nail magazine 5 by a snap-fit ​​for easy nail replenishment. The design of the nail magazine 5 allows nails to smoothly enter the inner cavity of the nail magazine 5 and be pushed one by one to the firing position by the pusher plate 6. The bottom of the cylinder 1 has a shock-absorbing pad 10, which is 3mm to 8mm thick and made of rubber or silicone. The shock-absorbing pad 10 absorbs the vibration generated during the operation of the cylinder 1, reducing the impact on the equipment and improving its service life.

[0022] In actual operation, when the pneumatic nail machine is started, the built-in air circuit control valve 9 opens, and gas enters the cylinder 1 through the air circuit channel, pushing the piston and piston rod 2 forward. The piston rod 2 drives the firing pin 3 to move linearly along the inner wall of the guide sleeve 4, and the firing pin 3 strikes the nail to complete the firing action. At the same time, the connecting rod 8, along with the movement of the firing pin 3, pulls the push plate 6 downward, compressing the elastic element 7. When the firing pin 3 retracts, the elastic element 7 returns to its original shape, pushing the push plate 6 upward, pushing the next nail to the firing position. The entire process is repeated, realizing the function of continuous firing.

[0023] In the above embodiments, the connection and positional relationships between the various components are all rationally designed. For example, the embedded connection between cylinder 1 and the built-in air circuit control valve 9, the sealing fit between the striking pin 3 and the guide sleeve 4, and the hinged connection between the connecting rod 8 and the push plate 6 all reflect a compact structural layout and efficient mechanical transmission. Through these designs, this utility model solves the problems of insufficient compactness of the transmission components, large overall size, and inconvenience in carrying and operating existing pneumatic nail machines. It also improves the problem of nail jamming or incomplete nail feeding caused by low precision in the matching of the striking pin and the nail feeding mechanism, and optimizes the technical defect of the air circuit control valve being susceptible to external dust and impurities, leading to air circuit blockage or sealing failure. To better enable those skilled in the art to fully understand and implement this utility model, the specific implementation principle of this utility model is further explained below in conjunction with a specific application scenario.

[0024] In actual operation, when the pneumatic nail machine is started, the built-in air circuit control valve 9 first responds to the change in gas pressure. Gas enters the valve body through the air circuit channel, pushing the valve core to overcome the spring force, thereby opening the vent. At this time, the gas flows to the piston side of cylinder 1, pushing the piston and piston rod 2 forward. The key to this process lies in the design of the built-in air circuit control valve 9, which is embedded in the side wall of cylinder 1, avoiding the problem of traditional external placement being easily affected by dust and impurities, and ensuring the air circuit's sealing performance through the tight fit between the sealing gasket and the vent port. This design not only improves the reliability of air circuit control but also significantly reduces the overall size of the equipment, making it more compact and portable.

[0025] As the piston rod 2 moves forward, the firing pin 3 moves linearly along the inner wall of the guide sleeve 4. Multiple annular grooves on the inner wall of the guide sleeve 4 are fitted with sealing rings, which fit tightly against the outer wall of the firing pin 3, effectively preventing gas leakage and improving the stability of the firing pin 3's movement. The trajectory of the firing pin 3 is further fixed by the threaded connection structure of the guide sleeve 4, ensuring that it maintains precise linear motion throughout the firing process. When the firing pin 3 strikes the nail, a firing action is completed. In this process, the design of the guide sleeve 4 not only enhances the sealing performance but also simplifies installation and disassembly operations through the threaded connection structure, improving the maintenance efficiency of the equipment.

[0026] Simultaneously, the connecting rod 8, along with the movement of the firing pin 3, pulls the push plate 6 downwards. The push plate 6 is slidably connected to the bottom of the nail magazine 5, and multiple protrusions on its top contact the nails inside the magazine 5. When the push plate 6 moves downwards, the elastic element 7 is compressed, storing elastic potential energy. When the firing pin 3 retracts, the elastic element 7 returns to its original state, pushing the push plate 6 upwards and propelling the next nail to the designated position. This nail-pushing mechanism design, through the elastic force of the elastic element 7 and the sliding cooperation of the push plate 6, ensures that the nails arrive at the firing position stably one by one, avoiding nail jamming or incomplete nail delivery. Furthermore, the length of the connecting rod 8 is adjustable from 5mm to 15mm. Adjusting the length of the connecting rod 8 optimizes the matching accuracy between the firing pin 3 and the nail delivery mechanism, further improving the reliability of the firing process.

[0027] The top of the nail magazine 5 has a nail inlet, and the guide slope on the inner wall of the inlet allows nails to smoothly enter the inner cavity of the nail magazine 5. When nails need to be replenished, the inlet can be quickly opened through the cover plate, and the cover plate can be closed again after replenishment. This design not only simplifies the nail replenishment process, but also ensures the smooth entry of nails into the nail magazine 5 through the guide slope, thus improving work efficiency. In addition, the shock-absorbing pad 10 at the bottom of the cylinder 1 can absorb the vibration generated during operation and reduce the impact on the equipment. The shock-absorbing pad 10 is 3mm to 8mm thick and made of rubber or silicone, which significantly improves the service life of the equipment.

[0028] In the cyclical process described above, the pneumatic nail machine achieves continuous firing. Key structural features such as the embedded design of the built-in air control valve 9, the sealing fit of the guide sleeve 4, and the hinged connection between the connecting rod 8 and the push plate 6 all demonstrate a compact layout and efficient mechanical transmission. Through these designs, this invention solves the problems of existing pneumatic nail machines having insufficiently compact transmission component layout, large overall size, and inconvenience in carrying and operation. It also improves the problem of nail jamming or incomplete nail delivery caused by low precision in the engagement between the firing pin and the nail feeding mechanism, and optimizes the technical defect of the air control valve being susceptible to air circuit blockage or sealing failure due to external dust and impurities.

[0029] All content not described in detail in this specification is prior art known to those skilled in the art, and the model parameters of each component are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are prior art and are therefore not shown in the figures, nor will they be described further here.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pneumatic nailing machine, characterized in that, It includes a drive assembly, a firing assembly, and a nail feeding assembly. The drive assembly is connected to the firing assembly through an air passage. The firing assembly is located on one side of the nail feeding assembly. The drive assembly includes a cylinder (1) and a piston rod (2). A piston is provided inside the cylinder (1). One end of the piston rod (2) is fixedly connected to the piston, and the other end extends to the outside of the cylinder (1) and is connected to the firing assembly. The nail feeding assembly includes a nail magazine (5) and a nail pushing mechanism. The nail pushing mechanism is located at the bottom of the nail magazine (5) and is linked to the firing assembly through a connecting rod (8). A built-in air passage control valve (9) is provided at the inlet of the air passage.

2. The pneumatic nailing machine according to claim 1, characterized in that, The firing assembly includes a firing pin (3) and a guide sleeve (4). One end of the firing pin (3) is fixedly connected to the piston rod (2), and the other end passes through the guide sleeve (4) and extends to the outlet of the nail feeding assembly. The inner wall of the guide sleeve (4) is provided with multiple annular grooves, and a sealing ring is embedded in the annular groove. The sealing ring fits against the outer wall of the firing pin (3). The outer wall of the guide sleeve (4) is provided with threads, and the guide sleeve (4) is connected to the housing of the nail feeding assembly through the threads.

3. A pneumatic nailing machine according to claim 1, characterized in that, The pusher mechanism includes a pusher plate (6) and an elastic element (7). The pusher plate (6) is slidably connected to the bottom of the nail box (5). One end of the elastic element (7) is fixedly connected to the pusher plate (6), and the other end is fixedly connected to the inner wall of the nail box (5). The top of the pusher plate (6) is provided with multiple protrusions, and the protrusions contact the nails in the nail box (5).

4. A pneumatic nailing machine according to claim 1, characterized in that, One end of the connecting rod (8) is rotatably connected to the push plate (6) via a hinge shaft, and the other end is fixedly connected to the middle of the firing pin (3). The length of the connecting rod (8) is adjustable, with an adjustment range of 5mm to 15mm.

5. A pneumatic nailing machine according to claim 1, characterized in that, The built-in air circuit control valve (9) includes a valve body and a valve core. The valve body has an air vent inside. The valve core is slidably connected to the valve body. One end of the valve core is provided with a spring. The other end of the spring is fixedly connected to the inner wall of the valve body. The other end of the valve core is provided with a sealing gasket. The sealing gasket fits into the port of the air vent.

6. A pneumatic nailing machine according to claim 1, characterized in that, The cylinder (1) has a mounting groove on its side wall. The mounting groove has a positioning pin inside. One end of the positioning pin is fixedly connected to the valve body, and the other end extends to the outside of the cylinder (1).

7. A pneumatic nailing machine according to claim 1, characterized in that, The top of the nail box (5) is provided with a nail inlet, the inner wall of the nail inlet is provided with a guide slope, the guide slope is connected to the inner cavity of the nail box (5), and the outer side of the nail inlet is provided with a cover plate, which is connected to the nail box (5) by a buckle.

8. A pneumatic nailing machine according to claim 1, characterized in that, The bottom of the cylinder (1) is provided with a shock-absorbing pad (10), the thickness of which is 3mm to 8mm and the material is rubber or silicone.

9. A pneumatic nailing machine according to claim 1, characterized in that, The built-in air circuit control valve (9) is embedded in the side wall of the cylinder (1).

10. A pneumatic nailing machine according to claim 6, characterized in that, The outer wall of the positioning pin is provided with anti-slip texture.

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