Nailing gun and its blow valve

Abstract

The utility model discloses a nail gun and pneumatic valve thereof, including valve cavity, the valve rod of axially slidably being passed in the valve cavity and the elastic member of being sleeved on the valve rod, the valve rod is equipped with first sealing element, and the valve rod has first position and second position in the valve cavity, when the valve rod is at first position, first sealing element cooperates with the inner wall of valve cavity to close the gas circuit, when the valve rod moves to second position by overcoming the elastic force of elastic member, first sealing element is separated from the inner wall of valve cavity. Through the setting of pneumatic valve, the blowing and removing dirt function is integrated in the nail gun body, realizes the unity of the nail and the removing dirt function, and the operator does not need to interrupt the operation process, also does not need to find and switch other cleaning tools, only needs to trigger the blowing and removing dirt function, and the cleaning of operation surface can be completed after nailing instant, greatly improves the efficiency of continuous operation.

Description

Technical Field

[0001] This utility model relates to the field of nailing equipment technology, specifically to a nail gun and its air valve. Background Technology

[0002] Nail guns, as indispensable pneumatic or electric tools in woodworking, decoration, and packaging, primarily function to drive nails, U-shaped fasteners, and other fasteners into the target workpiece through instantaneous impact force. In actual operation, especially with wood, plasterboard, or in scenarios requiring fine machining, nailing inevitably generates a large amount of debris and dust. Some of this debris originates from the impacted workpiece surface, while some may come from the minute abrasion particles generated by the nail gun itself upon impact. These impurities scatter on and around the nailing area of ​​the workpiece, not only contaminating the working surface and affecting the accuracy and quality of subsequent bonding, painting, or measurement processes, but also potentially posing a respiratory health threat if inhaled by the operator.

[0003] Traditionally, cleaning up this debris has relied on separate cleaning tools. For example, operators need to pause nailing work and use a manual blower, brush, or separate compressed air sprayer. This approach has significant inefficiencies and inconveniences. First, it disrupts the continuous workflow, reducing overall efficiency, especially in large-scale, assembly-line environments where such interruptions accumulate into significant time costs. Second, operators need to frequently switch between nail guns and cleaning tools, increasing labor intensity and potentially leading to site chaos and even accidents due to improper tool placement. Furthermore, carrying additional cleaning tools increases the complexity of tool management and the burden on operators.

[0004] To address these issues, some experimental improvements have emerged in existing technologies. For example, some designs attempt to integrate a miniature vacuum suction device inside the nail gun, aiming to remove debris while nailing. However, such solutions are structurally complex, requiring additional power components (such as a miniature motor and fan) and dust bags or boxes, which undoubtedly increases the size, weight, and manufacturing cost of the nail gun. Furthermore, the air inlet of the suction device is easily clogged by sawdust and dust, requiring frequent maintenance and cleaning, resulting in poor reliability and limiting its widespread adoption in practical applications. Utility Model Content

[0005] To address the technical problems of existing nail guns requiring additional cleaning tools or having complex structures, this utility model proposes a nail gun and its air valve. By setting the air valve, the air blowing and chip removal function is integrated into the nail gun body, realizing the combination of nail driving and chip removal functions. The operator does not need to interrupt the work process or find and switch to other cleaning tools.

[0006] The technical solution adopted by this utility model is as follows: an air blowing valve includes a valve cavity, a valve stem that can be axially slidably inserted into the valve cavity, and an elastic element sleeved on the valve stem. The valve stem is provided with a first sealing element, and the valve stem has a first position and a second position in the valve cavity. When the valve stem is in the first position, the first sealing element cooperates with the inner wall of the valve cavity to seal the air passage. When the valve stem moves to the second position against the elastic force of the elastic element, the first sealing element disengages from the inner wall of the valve cavity.

[0007] Optionally, the valve stem includes a first rod body, an intermediate rod body, and a second rod body connected in sequence. The diameter of the intermediate rod body is smaller than that of the first rod body and the second rod body. The first rod body is movable inside the housing. The first rod body is provided with the first sealing element. The second rod body is provided with a second sealing element that always abuts against the inner wall of the valve cavity. The second rod body extends outside the housing and is fitted with the elastic element.

[0008] Optionally, the first rod body has a first limiting part at the end away from the middle rod body, and the first limiting part moves against the end face of the valve cavity. The second rod body has a second limiting part at the end away from the first rod body. One end of the elastic member abuts against the other end face of the valve cavity, and the other end of the elastic member abuts against the second limiting part.

[0009] Optionally, the first rod body is provided with a first annular groove for installing a first seal, and the second rod body is provided with a second annular groove for installing a second seal.

[0010] Optionally, the second limiting part includes a limiting plate and an annular plate. The limiting plate is connected to the second rod body. The annular plate is arranged around the outer peripheral wall of the limiting plate to form an annular cavity. The end of the elastic member away from the shell abuts against the inner wall of the limiting plate and is placed in the annular cavity.

[0011] Optionally, the depth of the annular cavity is greater than the diameter of the elastic element.

[0012] Optionally, the first and second seals are O-rings.

[0013] This utility model also discloses a nail gun, including a housing and the air valve mentioned above. The housing is provided with an air inlet channel, an air outlet and the valve cavity. When the valve rod moves to the second position, the valve cavity is connected to the air inlet channel and the air outlet respectively.

[0014] The beneficial effects of this invention are as follows: By integrating the air-blowing and dust-removing function into the nail gun body through the air-blowing valve, the nailing and dust-removing functions are combined into one. The operator does not need to interrupt the work process or search for and switch to other cleaning tools; simply triggering the air-blowing valve instantly cleans the work surface after nailing, greatly improving the efficiency of continuous operation, eliminating the hassle of carrying and managing additional cleaning tools, and reducing the operator's equipment burden. Since the dust-removing air source comes from the high-pressure gas of the nail gun itself, the airflow is concentrated and powerful, effectively and quickly dispersing debris and dust from the nailing area, ensuring a clean working surface. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the air-blowing valve proposed in an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the air blowing valve proposed in an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the air intake channel of the nail gun proposed in an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of the air outlet of the nail gun proposed in an embodiment of the present invention.

[0019] The labels in the attached figures are as follows: 1. Valve stem; 11. First rod body; 12. Intermediate rod body; 13. Second rod body; 14. First limiting part; 15. Second limiting part; 151. Limiting plate; 152. Annular plate; 2. Elastic element; 3. First sealing element; 4. Second sealing element; 5. Housing; 51. Air inlet channel; 52. Valve cavity; 53. Air outlet. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0021] like Figures 1 to 4 As shown, this embodiment discloses a nail gun, including a housing 5 and an air valve. The housing 5 has an air inlet channel 51, a valve cavity 52 communicating with the air inlet channel 51, and an air outlet 53 communicating with the valve cavity 52. ​​The air valve includes a valve stem 1 and an elastic element 2. The valve stem 1 is axially slidably inserted into the valve cavity 52, and the elastic element 2, sleeved on the valve stem 1, provides a restoring force for the valve stem 1. The elastic element 2 is typically a compression spring. A first sealing element 3 is provided on the valve stem 1. The valve stem 1 has two positions within the valve cavity 52:

[0022] First position (normal position): Under the elastic force of the elastic element 2, the valve stem 1 is in the first position. At this time, the first sealing element 3 is tightly fitted with the inner wall of the valve cavity 52, thereby sealing the air passage from the air inlet channel 51 to the air outlet 53.

[0023] Second position (air blowing position): When the operator applies external force, causing the valve stem 1 to move axially to the second position against the elastic force of the elastic member 2, the first sealing member 3 moves accordingly and disengages from the sealing contact with the inner wall of the valve cavity 52, thereby opening the air passage. At this time, compressed air can enter the valve cavity 52 from the air inlet channel 51, and then be ejected at high speed from the air outlet 53 opened on the housing 5 through the opened channel.

[0024] The air valve integrates the air blowing function into the nail gun body, enabling instant air blowing and chip removal without the need for external tools. The operator simply triggers valve 1 to immediately clean debris from the work surface after nailing, greatly improving work efficiency and ease of operation.

[0025] Furthermore, the valve stem 1 is a stepped shaft structure, comprising a first rod 11, an intermediate rod 12, and a second rod 13 connected coaxially in sequence. The diameter of the intermediate rod 12 is smaller than that of the first rod 11 and the second rod 13. This design creates a specific airflow channel within the valve cavity 52. ​​The first rod 11 remains inside the housing 5, and a first sealing element 3 is installed on its outer peripheral wall. A second sealing element 4 is installed on the second rod 13. This second sealing element 4 remains in contact with the inner wall of the valve cavity 52 throughout the entire stroke of the valve stem 1, providing dynamic sealing and guidance to prevent gas leakage from the tail of the valve stem 1. The elastic element 2 is sleeved on the second rod 13. The first rod 11 is responsible for opening and closing the air passage, while the second rod 13 is responsible for guiding the elastic element 2 and sealing its tail. The annular space formed by the intermediate rod 12 ensures unobstructed airflow.

[0026] To ensure the accuracy and stability of the valve stem 1's stroke, a first limiting part 14 is provided at the end of the first rod 11 away from the intermediate rod 12. The first limiting part 14 can be a flange or a retaining ring. A second limiting part 15 is provided at the end of the second rod 13 away from the first rod 11. When the valve stem 1 is in the first position, the first limiting part 14 on the first rod 11 moves against one end face of the valve cavity 52 to prevent the valve stem 1 from excessively retracting under the action of elastic force. One end of the elastic member 2 abuts against the other end face of the valve cavity 52, and the other end of the elastic member 2 abuts against the limiting part of the second rod 13. The first limiting part 14 and the second limiting part 15 together limit the axial movement range of the valve stem 1, ensuring that the first sealing member 3 achieves sealing and opening in the correct position, preventing damage to parts due to excessive movement, and improving the product's service life and reliability.

[0027] To facilitate installation and ensure sealing stability, an annular groove is provided on the first rod 11 for precise installation and fixation of the first sealing element 3. Another annular groove is provided on the second rod 13 for installing the second sealing element 4. This effectively prevents displacement or torsion of the first sealing element 3 and the second sealing element 4 during use, ensuring long-term sealing effectiveness. Both the first sealing element 3 and the second sealing element 4 are preferably standard O-rings.

[0028] The second limiting part 15 of the second rod 13 specifically includes a limiting plate 151 connected to the end of the second rod 13, and an annular plate 152 extending vertically from the outer peripheral wall of the limiting plate 151. The limiting plate 151 and the annular plate 152 together form an open annular cavity. The end of the elastic member 2 away from the housing 5 abuts against the inner wall of the limiting plate 151, and its end is accommodated in the annular cavity. The annular cavity can prevent the elastic member 2 from lateral slippage or tilting during compression or rebound, ensuring the linearity and stability of the valve stem 1 movement and improving the operating feel. The depth of the annular cavity is designed to be greater than the diameter of the elastic member 2. This means that when the elastic member 2 is fully compressed, its entirety can be completely housed in the annular cavity, ensuring that the elastic member 2 is fully protected and guided even during maximum stroke operation, avoiding the risk of excessive bending or even ejection of the spring.

[0029] A quick-connect coupling can be attached to the inlet of air intake channel 51 for connecting to an external compressed air line. The quick-connect coupling allows users to quickly and easily connect or disconnect the air source, improving the flexibility and convenience of tool use.

[0030] It is understood that the specific embodiments described above are merely for explaining the relevant utility model and not for limiting the utility model. It should also be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict with each other. All equivalent structural transformations made based on the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly included within the protection scope of this utility model.

Claims

1. An air blowing valve, characterized in that, The valve includes a valve cavity, a valve stem that is axially slidably inserted into the valve cavity, and an elastic element sleeved on the valve stem. The valve stem is provided with a first sealing element, and the valve stem has a first position and a second position in the valve cavity. When the valve stem is in the first position, the first sealing element cooperates with the inner wall of the valve cavity to seal the air passage. When the valve stem moves to the second position against the elastic force of the elastic element, the first sealing element disengages from the inner wall of the valve cavity.

2. The air-blowing valve according to claim 1, characterized in that, The valve stem includes a first rod body, an intermediate rod body, and a second rod body connected in sequence. The diameter of the intermediate rod body is smaller than that of the first rod body and the second rod body. The first rod body is located inside the housing. The first rod body is provided with the first sealing element. The second rod body is provided with the second sealing element that always abuts against the inner wall of the valve cavity. The second rod body extends outside the housing and is fitted with the elastic element.

3. The air-blowing valve according to claim 2, characterized in that, The first rod body has a first limiting part at the end away from the middle rod body, and the first limiting part moves against the end face of the valve cavity. The second rod body has a second limiting part at the end away from the first rod body. One end of the elastic element abuts against the other end face of the valve cavity, and the other end of the elastic element abuts against the second limiting part.

4. The air-blowing valve according to claim 2, characterized in that, The first rod body is provided with a first annular groove for installing a first seal, and the second rod body is provided with a second annular groove for installing a second seal.

5. The air-blowing valve according to claim 3, characterized in that, The second limiting part includes a limiting plate and an annular plate. The limiting plate is connected to the second rod body. The annular plate is arranged around the outer peripheral wall of the limiting plate to form an annular cavity. The end of the elastic member away from the shell abuts against the inner wall of the limiting plate and is placed in the annular cavity.

6. The air-blowing valve according to claim 5, characterized in that, The depth of the annular cavity is greater than the diameter of the elastic element.

7. The air-blowing valve according to claim 2, characterized in that, The first and second seals are O-rings.

8. A nail gun, characterized in that, The device includes a housing and an air valve as described in any one of claims 1 to 7. The housing is provided with an air inlet channel, an air outlet, and the valve cavity. When the valve stem moves to the second position, the valve cavity is connected to the air inlet channel and the air outlet, respectively.

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