Dustproof air cylinder, force supply device and nail gun

Abstract

The dustproof air cylinder comprises an outer cylinder body, an inner cylinder body, a cylinder head seat, an exhaust channel and a filter screen, the inner cylinder body is assembled in the outer cylinder body, the cylinder head seat is assembled at one end of the outer cylinder body, an opening in one end of the exhaust channel is formed in the cylinder head seat, and an opening in the other end of the exhaust channel is formed in the filter screen. An opening in the other end of the cylinder head seat is formed in the side, close to the cylinder head seat, of the inner cylinder body, the filter screen is arranged on the exhaust channel, and the openings are formed in the cylinder head seat and the portion, close to the side of the cylinder head seat, of the inner cylinder body respectively to form the special exhaust channel, so that compressed gas generated when a piston is triggered can be directly exhausted through the exhaust channel. And therefore, the smoothness of the movement of the piston is ensured, and meanwhile, conditions are provided for realizing effective sealing at the cylinder head seat.

Description

Technical Field

[0001] This utility model relates to the field of nail gun technology, and in particular to a dustproof cylinder, a power supply device, and a nail gun. Background Technology

[0002] Nail guns, as efficient and convenient fastening tools, are widely used in construction, decoration, and carpentry. Their working principle primarily involves releasing compressed air or propellant gas through a trigger mechanism, which drives a piston at high speed, thus propelling the nail into the target material. During firing, the piston compresses the gas within the cylinder and expels it through the nozzle to ensure smooth piston movement.

[0003] However, in the design of traditional nail guns, to ensure smooth gas escape during firing, a seal is usually not placed in front of the firing pin. While this design ensures unimpeded gas escape, it introduces significant problems during piston reset. When the nail gun is used in dusty work environments, the lack of an effective seal at the nozzle allows external dust and impurities to easily enter the cylinder through the gap between the firing pin and the nozzle.

[0004] Specifically, when the piston completes its firing action and returns to its original position, a certain negative pressure is generated inside the cylinder. External air, carrying dust, is drawn into the cylinder through the gap at the nozzle. This dust not only contaminates the inner wall of the cylinder but can also cause wear on the piston surface. Over time, the dust adheres to the inner wall of the cylinder and the piston surface, forming a stubborn layer of dirt. This not only increases the resistance to piston movement but may also lead to a decrease in the seal between the piston and the cylinder, further exacerbating the intrusion of dust and impurities.

[0005] Dust contamination of the cylinder and piston can also lead to equipment malfunction and shortened lifespan. On the one hand, hard particles in the dust can scratch the inner wall of the cylinder and the surface of the piston, causing a decrease in equipment accuracy; on the other hand, dust can also cause jamming of other moving parts inside the cylinder, affecting the normal operation of the nail gun. In extreme cases, dust may even cause equipment jamming or damage, resulting in economic losses and safety risks for users. Utility Model Content

[0006] In order to overcome at least one of the defects of the prior art, the present invention provides a dustproof cylinder, a power supply device and a nail gun, which can solve the problem of dust entering the cylinder and affecting the normal use of the cylinder.

[0007] The technical solution adopted by this utility model to solve its problem is:

[0008] A dustproof cylinder, comprising:

[0009] Outer cylinder block;

[0010] An inner cylinder body, which is assembled into the outer cylinder body;

[0011] Cylinder head seat, which is assembled at one end of the outer cylinder body;

[0012] An exhaust passage, wherein one end of the exhaust passage is located at the cylinder head seat, and the other end is located at the inner cylinder body on the side near the cylinder head seat.

[0013] A filter screen is disposed in the exhaust channel.

[0014] Furthermore, the cylinder head seat is provided with a first exhaust port, which forms an opening at one end of the exhaust channel;

[0015] The inner cylinder is provided with a second air outlet on the side near the cylinder head seat, and the second air outlet forms the opening at the other end of the exhaust channel.

[0016] Furthermore, the first air outlet is provided with multiple outlets, and the filter screen is provided in the exhaust channel, or the filter screen is provided in the second air outlet, or each of the first air outlets is provided with the filter screen.

[0017] Furthermore, the second air outlet is provided with multiple outlets, and the filter screen is provided in the exhaust channel, or the filter screen is provided in the first air outlet, or each second air outlet is provided with the filter screen.

[0018] Furthermore, it also includes a bushing, which is fitted onto the inner cylinder body and located between the opening in the inner cylinder body and the point in the inner cylinder body away from the cylinder head seat. The inner wall of the bushing is sealed and fitted to the inner cylinder body, and the outer wall of the bushing is sealed and fitted to the outer cylinder body.

[0019] Furthermore, the gap between the cylinder head seat and the bushing forms the exhaust passage.

[0020] Furthermore, the insert is disposed on the side of the inner cylinder body near the cylinder head seat.

[0021] This utility model also provides a power supply device, including:

[0022] As mentioned above, dustproof cylinders;

[0023] A firing pin assembly, comprising a firing pin and a piston, wherein one end of the firing pin is mounted on the piston, and the piston is slidably disposed within the inner cylinder.

[0024] Furthermore, the cylinder head seat is provided with an assembly hole through which the firing pin passes, and a sealing member is provided at the assembly hole. The sealing member is provided with a clearance hole through which the firing pin passes, and the shape of the clearance hole wall corresponds to the shape of the firing pin.

[0025] This utility model also provides a nail gun, including the aforementioned dustproof cylinder.

[0026] In summary, the dustproof cylinder, power supply device, and nail gun provided by this utility model have the following technical effects:

[0027] 1. By setting openings on the cylinder head seat and the inner cylinder block near the cylinder head seat respectively, a dedicated exhaust channel is formed, which allows the compressed gas generated by the piston during firing to be discharged directly through the exhaust channel without any obstruction, thus ensuring the smooth movement of the piston and providing conditions for effective sealing at the cylinder head seat.

[0028] 2. Due to the independent exhaust path and channel, a sealing element can be installed at the cylinder head seat without affecting gas emission. The sealing element can tightly surround the firing pin, preventing dust and impurities from being sucked into the cylinder from the outside through the gap between the firing pin and the nozzle, thus ensuring the airtightness of the entire cylinder and reducing the possibility of dust intrusion.

[0029] 3. The addition of a filter screen in the exhaust channel further enhances the dust prevention effect. When a negative pressure is generated inside the cylinder to draw in outside air, the air will first be filtered by the filter screen. This ensures that even if a small amount of dust flows with the air, it will be blocked by the filter screen and cannot enter the cylinder. This protects the internal components of the cylinder from wear and extends the service life of the equipment. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0031] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0032] Figure 3 For the present utility model Figure 2 Enlarged view of part A;

[0033] Figure 4 This is a reference diagram showing the gas flow state of this utility model;

[0034] Figure 5 This is a first-view exploded structural diagram of the present invention;

[0035] Figure 6 This is a second-view exploded structural diagram of the present invention.

[0036] The meanings of the reference numerals in the attached drawings are as follows: 1. Outer cylinder; 2. Inner cylinder; 21. Second exhaust port; 3. Cylinder head seat; 31. First exhaust port; 4. Filter screen; 5. Bushing; 61. Impact pin; 62. Piston; 7. Sealing component; 8. Clearance hole; 9. Rear end cap. Detailed Implementation

[0037] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described and discussed below with reference to the accompanying drawings. Obviously, what is described here is only a part of the examples of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the protection scope of this invention.

[0038] To facilitate understanding of the embodiments of this utility model, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of this utility model.

[0039] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0041] See Figures 1-6 This utility model discloses a dustproof cylinder, including an outer cylinder body 1, an inner cylinder body 2, a cylinder head seat 3, an exhaust channel and a filter screen 4. The inner cylinder body 2 is assembled inside the outer cylinder body 1, the cylinder head seat 3 is assembled at one end of the outer cylinder body 1, the opening of one end of the exhaust channel is located at the cylinder head seat 3, and the opening of the other end is located on the side of the inner cylinder body 2 near the cylinder head seat 3. The filter screen 4 is located in the exhaust channel.

[0042] Specifically, the inner cylinder 2 is located inside the outer cylinder 1, and the cylinder head seat 3 is located at one end of the outer cylinder 1. One end of the exhaust passage has an opening in the cylinder head seat 3, and the other end has an opening in the inner cylinder 2 near the cylinder head seat 3. This allows gas to flow freely through the inner cylinder 2, the exhaust passage, and then through the opening in the cylinder head seat 3, ensuring that even with a sealing element 7 at the cylinder head seat 3, gas emission is not affected. The sealing element 7 tightly surrounds the firing pin 61, preventing dust and impurities from being sucked into the cylinder through the gap between the firing pin 61 and the nozzle, thus ensuring the airtightness of the entire system and reducing the possibility of dust intrusion. Furthermore, a filter screen 4 is installed in the exhaust passage. This filter screen 4 can be installed at the openings at both ends of the exhaust passage or within the exhaust passage itself, and the specific installation location can be freely selected according to requirements. Similarly, the number of filter screens 4 can also be freely selected as needed, sufficient to prevent dust from entering the inner cylinder 2. The exhaust passage opening is located on the side of the inner cylinder 2 near the cylinder head seat 3, which can shorten the length of the exhaust passage as much as possible, thereby improving the smoothness of piston 62 movement.

[0043] In some embodiments, the cylinder head seat 3 is provided with a first air outlet 31, which forms an opening at one end of the exhaust channel, and the inner cylinder body 2 is provided with a second air outlet 21 on the side near the cylinder head seat 3, which forms an opening at the other end of the exhaust channel.

[0044] See Figure 3 and Figure 5 As shown, specifically, the cylinder head seat 3 is provided with a first exhaust port 31, which forms the opening at one end of the exhaust channel. That is, the cylinder head seat 3 is provided with a first exhaust port 31 as the opening at one end of the exhaust channel, and the inner cylinder body 2 is provided with a second exhaust port 21 on the side near the cylinder head seat 3 as the opening at the other end of the exhaust channel. The design of the exhaust channel is facilitated by directly drilling holes during the processing of the cylinder head seat 3 and the inner cylinder body 2.

[0045] In some embodiments, the first air outlet 31 is provided with multiple filters 4, or filters 4 are provided in the exhaust channel, or filters 4 are provided in the second air outlet 21, or each first air outlet 31 is provided with a filter 4.

[0046] See Figure 3 and Figure 5 As shown, specifically, the cylinder head seat 3 is provided with multiple first exhaust ports 31. The first exhaust ports 31 serve as part of the exhaust channel, helping compressed gas to be smoothly discharged from the inner cylinder 2. At the same time, they can also absorb gas into the inner cylinder 2 when the piston 62 returns to its original position. The structure of multiple first exhaust ports 31 can increase the gas discharge area, which helps to discharge gas more efficiently and reduce the pressure caused by gas accumulation.

[0047] Alternatively, based on the structure of having multiple first air outlets 31, the filter screen 4 can be set in the exhaust channel. Correspondingly, in the minimum case, only one filter screen 4 is needed. Regardless of which first air outlet 31 the gas flows into will converge into the middle of the exhaust channel, that is, it will be filtered by the filter screen 4 set in the exhaust channel, thereby effectively preventing dust from entering the inner cylinder 2.

[0048] The filter 4 can also be located at the second air outlet 21. This setting allows for direct filtration of the gas as it passes through the exhaust channel to the second air outlet 21, effectively preventing dust that may enter the inner cylinder 2 along with the gas.

[0049] A filter screen 4 can also be provided in each of the first air outlets 31. This arrangement can ensure that even air drawn in from different directions can be effectively filtered, minimizing the possibility of dust entering.

[0050] See Figure 3 and Figure 5 As shown, in some embodiments, the second air outlet 21 is provided with multiple filters 4, or filters 4 are provided in the exhaust channel, or filters 4 are provided in the first air outlet 31, or each second air outlet 21 is provided with a filter 4.

[0051] Specifically, multiple second exhaust ports 21 are provided on the inner cylinder 2. The second exhaust ports 21 serve as part of the exhaust channel, allowing compressed gas to be smoothly discharged from the inner cylinder 2. At the same time, they can also absorb gas into the inner cylinder 2 when the piston 62 is reset. The structure of multiple second exhaust ports 21 can increase the gas discharge area, which helps to discharge gas more efficiently and reduce the pressure caused by gas accumulation.

[0052] Alternatively, based on the structure of having multiple second air outlets 21, the filter 4 can be set in the exhaust channel. Correspondingly, in the minimum case, only one filter 4 is needed. That is, when air enters through the first air outlet 31, it will pass through the exhaust channel and enter one or more of the second air outlets 21. In other words, the filter 4 set in the exhaust channel can filter the dust in the gas when the gas flows through the filter 4 set in the exhaust channel, thereby reducing the amount of dust flowing into the inner cylinder 2.

[0053] The filter 4 can also be located at the first air outlet 31. This setting allows for direct filtration of the gas as it passes through the exhaust channel to the first air outlet 31, effectively preventing dust that may enter the inner cylinder 2 along with the gas.

[0054] A filter screen 4 can also be provided in each of the second air outlets 21. This arrangement can ensure that the gas flowing through the second air outlets 21 is effectively filtered, minimizing the possibility of dust entering.

[0055] See Figure 3As shown, in some embodiments, the cylinder further includes a bushing 5, which is fitted onto the inner cylinder body 2 and located between the opening of the inner cylinder body 2 and the inner cylinder body 2 away from the cylinder head seat 3. The inner wall of the bushing 5 is sealed and fitted with the inner cylinder body 2, and the outer wall of the bushing 5 is sealed and fitted with the outer cylinder body 1.

[0056] Specifically, the sleeve 5 is fitted onto the outside of the inner cylinder 2, and is located between the opening of the inner cylinder 2 and the end of the inner cylinder 2 away from the cylinder head seat 3. That is, in the case of the structure with the second exhaust port 21, the position of the second exhaust port 21 is between the end of the inner cylinder 2 away from the cylinder head seat 3. For the sake of convenience in describing the specific position of the sleeve 5, the second exhaust port 21 is used below to refer to the opening of the exhaust passage on the inner cylinder 2. The inner wall of the sleeve 5 is sealed and fitted with the outer wall of the inner cylinder 2, and the outer wall of the sleeve 5 is fitted with the inner wall of the outer cylinder 1. This effectively isolates the gas flowing through the second exhaust port 21, preventing it from flowing into the end of the inner cylinder 2 away from the cylinder head seat 3 through the sleeve 5.

[0057] See Figure 3 and Figure 4 As shown, in some embodiments, the gap between the cylinder head seat 3 and the bushing 5 forms an exhaust passage.

[0058] Specifically, by setting the bushing 5, the space formed by the gap between the outer cylinder 1 and the inner cylinder 2 is isolated into two parts, so that the gap between the cylinder head seat 3 and the bushing 5 constitutes an exhaust channel, without the need to set up an additional pipe to form an exhaust channel.

[0059] See Figure 3 and Figure 4 As shown in some embodiments, the insert 5 is disposed on the side of the inner cylinder 2 near the cylinder head seat 3.

[0060] Specifically, the bushing 5 is located on the side of the inner cylinder 2 near the cylinder head seat 3, thereby minimizing the gap between the bushing 5 and the cylinder head seat 3, which also shortens the exhaust passage as much as possible.

[0061] In some embodiments, the outer cylinder body 1 has a stepped surface on the side facing the cylinder head seat 3. When the insert 5 is assembled, the insert 5 abuts against the stepped surface to limit its position, thereby ensuring the posture of the insert 5 relative to the outer cylinder body 1.

[0062] This utility model also provides a power supply device, including a striker assembly and a dustproof cylinder as described above. The striker assembly includes a striker 61 and a piston 62. One end of the striker 61 is mounted on the piston 62, and the piston 62 is slidably disposed in the inner cylinder 2.

[0063] Specifically, the firing pin 61 is used to strike the nail, causing it to penetrate the target material. One end of the firing pin 61 is mounted on the piston 62 and moves with the piston 62. The piston 62 slides inside the inner cylinder 2 and, when pushed by compressed gas, moves forward rapidly, driving the firing pin 61 to complete the firing action. The reciprocating motion of the piston 62 is the core of realizing the nail-shooting function. During firing, the piston 62 moves towards the cylinder head seat 3, which correspondingly pushes the gas between the piston 62 and the cylinder head seat 3 to be discharged from the inner cylinder 2 through the exhaust channel. Similarly, when the piston 62 returns to its original position, it moves away from the cylinder head seat 3, and the negative pressure inside the inner cylinder 2 draws air into the inner cylinder 2 through the exhaust channel. During the flow of air in the exhaust channel, as it passes through the filter screen 4, dust in the air is filtered to prevent dust from entering the inner cylinder 2.

[0064] Optionally, the power supply device also includes a rear end cover 9, which and the sleeve 5 seal the front and rear ends of the outer cylinder 1. The piston 62 is located inside the inner cylinder 2 and divides the inner cylinder 2 into two areas. The area near the rear end cover 9 and the cavity between the inner cylinder 2 and the outer cylinder 1 form the entire sealed air chamber, thus providing a structural basis for the structure of the gas spring.

[0065] In some embodiments, the cylinder head seat 3 is provided with an assembly hole through which the striker 61 passes, and a sealing member 7 is provided at the assembly hole. The sealing member 7 is provided with a clearance hole 8 through which the striker 61 passes, and the shape of the hole wall of the clearance hole 8 corresponds to the shape of the striker 61.

[0066] Specifically, the cylinder head seat 3 has a mounting hole through which the firing pin 61 passes. This hole allows the firing pin 61 to pass through the cylinder head seat 3 during firing, thereby driving the nail into the target material. A sealing element 7 is provided at the mounting hole to enhance airtightness and prevent dust and other impurities from entering the cylinder from the outside through the gap between the firing pin 61 and the mounting hole. A clearance hole 8 is provided in the center of the sealing element 7, providing a foundation for the firing pin 61 to pass through. The shape of the clearance hole 8 corresponds to the shape of the firing pin 61, that is, the clearance hole 8 fits tightly against the shape of the firing pin 61, minimizing the gap between the two. This ensures the free movement of the firing pin 61 while effectively blocking the intrusion of external dust and impurities.

[0067] This utility model also provides a nail gun, including the aforementioned dustproof cylinder.

[0068] By adopting a dustproof cylinder design, the nail gun can maintain good operating condition in dusty working environments, reducing mechanical failures caused by dust. It also reduces wear on internal parts, especially the piston 62 and the inner wall of the cylinder 2, helping to extend the service life of the equipment.

[0069] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A dustproof cylinder, characterized in that, include: Outer cylinder (1); Inner cylinder (2), which is assembled inside the outer cylinder (1); Cylinder head seat (3), the cylinder head seat (3) is assembled at one end of the outer cylinder body (1); The exhaust passage has an opening at one end located in the cylinder head seat (3) and an opening at the other end located on the inner cylinder body (2) near the cylinder head seat (3). Filter (4), the filter (4) is disposed in the exhaust channel.

2. A dustproof cylinder according to claim 1, characterized in that, The cylinder head seat (3) is provided with a first air outlet (31), which forms the opening at one end of the exhaust channel; The inner cylinder (2) is provided with a second air outlet (21) on the side near the cylinder head seat (3), and the second air outlet (21) forms the opening at the other end of the exhaust channel.

3. A dustproof cylinder according to claim 2, characterized in that, The first air outlet (31) is provided with multiple outlets, and the filter (4) is provided in the exhaust channel, or the filter (4) is provided in the second air outlet (21), or each of the first air outlets (31) is provided with the filter (4).

4. A dustproof cylinder according to claim 2 or 3, characterized in that, The second air outlet (21) is provided with multiple filters (4) located in the exhaust channel, or the filters (4) are located in the first air outlet (31), or each second air outlet (21) is provided with the filters (4).

5. A dustproof cylinder according to claim 1, characterized in that, It also includes a sleeve (5), which is fitted onto the inner cylinder (2) and located between the opening of the inner cylinder (2) and the inner cylinder (2) away from the cylinder head seat (3). The inner wall of the sleeve (5) is sealed to the inner cylinder (2), and the outer wall of the sleeve (5) is sealed to the outer cylinder (1).

6. A dustproof cylinder according to claim 5, characterized in that, The gap between the cylinder head seat (3) and the bushing (5) constitutes the exhaust passage.

7. A dustproof cylinder according to claim 5, characterized in that, The insert (5) is located on the inner cylinder body (2) near the cylinder head seat (3).

8. A power supply device, characterized in that, include: The dustproof cylinder according to any one of claims 1-7; The impact pin assembly includes an impact pin (61) and a piston (62), one end of the impact pin (61) is mounted on the piston (62), and the piston (62) is slidably disposed in the inner cylinder (2).

9. A power supply device according to claim 8, characterized in that, The cylinder head seat (3) is provided with an assembly hole through which the striker (61) passes. A sealing member (7) is provided at the assembly hole. The sealing member (7) is provided with a clearance hole (8) through which the striker (61) passes. The shape of the clearance hole (8) corresponds to the shape of the striker (61).

10. A nail gun, characterized in that, Includes the dustproof cylinder as described in any one of claims 1-7.

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