Air nail gun and pneumatic switch structure thereof

Abstract

The utility model relates to the technical field of nail guns, in particular to an air nail gun and a pneumatic switch structure thereof, which comprise a pneumatic switch interface, a driving cavity and an air source cavity, the pneumatic switch connector is communicated with an external air source, an elastic piece is arranged between a traveling valve of the air nail gun and a top cover of the air nail gun, a traveling valve moving cavity is formed between the traveling valve and the top cover, and the traveling valve moving cavity is communicated with the pneumatic switch connector. The end, away from the top cover, of the traveling valve and a rivet hitting device of the air nail gun form the driving cavity, the driving cavity can drive the rivet hitting device to do reciprocating motion, an air source connecting port is formed in the position, close to the traveling valve, of the driving cavity, and the air source connecting port can be communicated with the air source cavity; the traveling valve can open or seal the air source connector through sliding, and when the air source connector is opened, the driving cavity can communicate with the air source cavity. The number of sites needing to be sealed at the switch is small, and the service life of the air nail gun can be effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of nail guns, in particular to an air nail gun and a pneumatic switch structure thereof. Background Art

[0002] A pneumatic nail gun is a product of nail-shooting and fastening technology. It uses a nail-striking mechanism to fire nails. It is a direct fastening tool and an essential tool for carpentry, construction, and other fields. The prior art provides a switch device that utilizes a stable, long-lasting air source input. The switch comprises a switch valve and a switch port. The switch valve is connected at both ends to an air source inlet and a switch inlet, respectively. The air source inlet is connected to high-pressure air from the pneumatic nail gun, while the switch inlet is connected to air that drives the switch device. When air is supplied to the switch inlet, air in the floating valve chamber can be discharged through the switch exhaust port. Under the action of a pressure differential, the floating valve slides backward, opening the drive chamber. High-pressure air from the pneumatic nail gun acts on the piston rod, causing it to fire. When air is not supplied to the switch inlet, the air source inlet connects to the floating valve chamber through the switch air guide port. Pressures in the floating valve chamber are balanced, the drive chamber is sealed, and the piston rod remains stationary, ready to fire. At this time, the floating valve is not continuously compressed by the compression spring.

[0003] The above switch structure requires the use of multiple sealing rings for sealing, and the sealing rings need to slide along with the switch ejector pins. The sealing rings are prone to aging after long-term use, resulting in problems with the sealing performance of the switch. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art. The utility model provides an air nail gun and a pneumatic switch structure thereof, which have a simple structure, require fewer locations to be sealed at the switch, and can effectively increase the service life of the air nail gun.

[0005] In order to solve the above problems, the utility model proposes a pneumatic switch structure of a pneumatic nail gun, which is characterized by comprising a pneumatic switch interface, a drive chamber and an air source chamber;

[0006] The pneumatic switch interface is connected to an external air source, an elastic member is provided between the floating valve of the air nail gun and the top cover of the air nail gun, and a floating valve activity chamber is formed between the floating valve and the top cover, and the floating valve activity chamber is communicated with the pneumatic switch interface; the end of the floating valve away from the top cover forms the driving chamber with the nailing device of the air nail gun, and the driving chamber can drive the nailing device to reciprocate, and the driving chamber is provided with an air source connection port near the floating valve, and the air source connection port can be communicated with the air source chamber;

[0007] The floating valve can open or seal the gas source connection port by sliding. When the gas source connection port is opened, the driving chamber can be connected to the gas source chamber.

[0008] As an improvement of the above technical solution, the pneumatic switch interface is located on the side of the handle of the pneumatic nail gun; the pneumatic switch interface includes a switch body and a steering joint;

[0009] One end of the switch body is provided with the steering joint, the interior of the switch body and the steering joint form a switch air cavity, the switch air cavity is provided with an air delivery port, and the air delivery port is communicated with the active cavity of the floating valve.

[0010] As an improvement to the above technical solution, a first sealing ring is provided on the outer wall of the switch body at both sides of the gas output port, and the first sealing ring abuts against the inner wall of the air nail gun.

[0011] As an improvement of the above technical solution, the nail driving device includes a piston rod and a buffer pad, the buffer pad is arranged at the end of the piston rod close to the top cover, the buffer pad and the end of the floating valve away from the top cover form the driving chamber, and the piston rod can reciprocate between the front and rear of the air nail gun.

[0012] As an improvement to the above technical solution, a second sealing ring is provided on the outer periphery of the buffer pad.

[0013] As an improvement of the above technical solution, the floating valve includes a floating valve body and a gasket, the elastic member is provided between the floating valve body and the top cover, and the gasket is provided at the connection between the floating valve body and the elastic member.

[0014] As an improvement of the above technical solution, the elastic member is a compression spring.

[0015] As an improvement of the above technical solution, a third sealing ring is provided on the outer periphery of the gasket, and the third sealing ring abuts against the inner wall of the movable cavity of the floating valve.

[0016] Accordingly, the present invention provides a pneumatic nail gun comprising the pneumatic switch structure described above.

[0017] The implementation of this utility model has the following beneficial effects:

[0018] The pneumatic switch structure of the present invention includes a pneumatic switch interface, a drive chamber, and an air source chamber. The pneumatic switch interface is connected to an external air source. The pneumatic switch interface is also connected to a movable chamber of a floating valve. The floating valve of the pneumatic nail gun can slide in the movable chamber of the floating valve, and an elastic member is provided between the floating valve and the top cover of the pneumatic nail gun. The end of the floating valve away from the top cover forms a drive chamber with the nailing device of the pneumatic nail gun. The drive chamber is provided with an air source connection port near the floating valve, and the air source connection port can be connected to the air source chamber. The floating valve can open or seal the air source connection port by sliding. When the air source connection port is opened, the drive chamber can be connected to the air source chamber. Whether the floating valve slides can be controlled by simply controlling whether the external air source from the pneumatic switch interface is supplied with air. Therefore, the pneumatic switch interface saves multiple assembly parts and simplifies the internal structure. Since the number of locations that need to be sealed is greatly reduced, the service life of the switch interface can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a cross-sectional view of an air nail gun according to one embodiment of the present invention;

[0020] Figure 2 yes Figure 1 Magnified view at point A in the middle;

[0021] Figure 3 It is a cross-sectional view of a pneumatic switch interface according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0023] See also Figures 1 to 3 As shown, an embodiment of the present invention provides a pneumatic switch structure of a pneumatic nail gun, comprising a pneumatic switch interface 1 , a drive chamber 2 and an air source chamber 3 .

[0024] The embodiment of the present invention improves the structure of the pneumatic switch interface, thereby reducing the number of parts and sealing points therein, thereby increasing the service life of the air nail gun.

[0025] Specifically, the pneumatic switch interface 1 is connected to an external air source, an elastic member 53 is provided between the traveling valve 5 of the air nail gun and the top cover of the air nail gun, and a traveling valve activity chamber 4 is formed between the traveling valve 5 and the top cover, and the traveling valve activity chamber 4 is communicated with the pneumatic switch interface 1; the end of the traveling valve 5 away from the top cover forms the driving chamber 2 with the nailing device 6 of the air nail gun, and the driving chamber 2 can drive the nailing device 6 to reciprocate. The driving chamber 2 is provided with an air source connection port 21 near the traveling valve 5, and the air source connection port 21 can be communicated with the air source chamber 3;

[0026] The traveling valve 5 can open or seal the gas source connection port 21 by sliding. When the gas source connection port 21 is opened, the driving chamber 2 and the gas source chamber 3 can be communicated with each other.

[0027] The pneumatic switch structure of the present invention includes a pneumatic switch interface 1, a drive chamber 2, and an air source chamber 3. The pneumatic switch interface 1 is connected to an external air source and is also connected to a floating valve active chamber 4. The floating valve 5 of the pneumatic nail gun can slide within the floating valve active chamber 4, and an elastic member 53 is provided between the floating valve 5 and the top cover of the pneumatic nail gun. The end of the floating valve 5 away from the top cover forms a drive chamber 2 with the nail gun's nailing device 6. The drive chamber 2 is provided with an air source connection port 21 near the floating valve 5, and the air source connection port 21 can be connected to the air source chamber 3. The floating valve 5 can open or seal the air source connection port 21 by sliding. When the air source connection port 21 is open, the drive chamber 2 and the air source chamber 3 can be connected. Whether the floating valve 5 slides can be controlled by simply controlling whether the external air source at the pneumatic switch interface 1 is supplying air. Therefore, the pneumatic switch interface 21 saves multiple assembly parts and simplifies the internal structure. Since the number of locations that need to be sealed is greatly reduced, the service life of the pneumatic switch interface 1 can be effectively improved.

[0028] Preferably, the pneumatic switch interface 1 is located on the side of the handle of the pneumatic nail gun; the pneumatic switch interface 1 includes a switch body 12 and a steering joint 11;

[0029] The switch body 12 is provided with the steering joint 11 at one end. The interior of the switch body 12 and the steering joint 11 form a switch air chamber 13. The switch air chamber 13 is provided with a gas supply port 14, and the gas supply port 14 is connected to the floating valve active chamber 4. During operation, the steering joint 11 is connected to a machine that provides an external air source, and high-pressure gas enters the switch body 12 from the steering joint 11, and then enters the floating valve active chamber 4 from the switch body 12. Under the action of the high-pressure gas, the floating valve 5 is always sealed with the air source connection port 21, so that the high-pressure gas in the air source chamber 3 cannot enter the drive chamber 2. When it is necessary to strike a nail, the external air source only needs to stop supplying air and exhaust the gas. The pressure in the floating valve active chamber 4 is reduced, and the floating valve 5 slides under the air pressure of the air source chamber 3. The floating valve 5 opens the air source connection port 21, and the drive chamber 2 is connected to the air source chamber 3.

[0030] More preferably, the outer wall of the switch body 12 is provided with a first sealing ring 15 on both sides of the gas delivery port 14 , and the first sealing ring 15 abuts against the inner wall of the air nail gun.

[0031] Preferably, the nailing device 6 includes a piston rod 62 and a buffer pad 61. The buffer pad 61 is provided at the end of the piston rod 62 close to the top cover. The buffer pad 61 and the end of the traveling valve 5 away from the top cover form the driving chamber 2. The piston rod 62 can reciprocate between the front and rear of the air nail gun. The buffer pad 61 is used to cushion the impact of the piston rod 62 on the front of the air nail gun.

[0032] More preferably, a second sealing ring 63 is provided on the outer periphery of the buffer pad 61 .

[0033] Preferably, the traveling valve 5 includes a traveling valve body 51 and a gasket 52. The elastic member 53 is provided between the traveling valve body 51 and the top cover. The gasket 52 is provided at the connection between the traveling valve body 51 and the elastic member 53. More preferably, the elastic member 53 is a compression spring.

[0034] More preferably, a third sealing ring 54 is provided on the outer periphery of the gasket 52 , and the third sealing ring 54 abuts against the inner wall of the movable chamber 4 of the floating valve.

[0035] Correspondingly, an embodiment of the present invention further provides a pneumatic nail gun, comprising the pneumatic switch structure described above.

[0036] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A pneumatic switch structure for a pneumatic nail gun, characterized in that: It includes a pneumatic switch interface, a drive cavity and an air source cavity; The pneumatic switch interface is connected to an external air source, an elastic member is provided between the floating valve of the air nail gun and the top cover of the air nail gun, and a floating valve activity chamber is formed between the floating valve and the top cover, and the floating valve activity chamber is communicated with the pneumatic switch interface; the end of the floating valve away from the top cover forms the driving chamber with the nailing device of the air nail gun, and the driving chamber can drive the nailing device to reciprocate, and the driving chamber is provided with an air source connection port near the floating valve, and the air source connection port can be communicated with the air source chamber; The traveling valve can open or seal the gas source connection port by sliding, and when the gas source connection port is opened, the driving cavity can be connected with the gas source cavity; The pneumatic switch interface is located on the side of the handle of the pneumatic nail gun; the pneumatic switch interface includes a switch body and a steering joint; One end of the switch body is provided with the steering joint, the interior of the switch body and the steering joint form a switch air cavity, the switch air cavity is provided with an air delivery port, and the air delivery port is communicated with the active cavity of the floating valve.

2. The pneumatic switch structure according to claim 1, wherein: The outer wall of the switch body is provided with a first sealing ring on both sides of the gas delivery port, and the first sealing ring abuts against the inner wall of the air nail gun.

3. The pneumatic switch structure according to claim 1, wherein: The nail striking device includes a piston rod and a buffer pad, wherein the buffer pad is arranged at one end of the piston rod close to the top cover, and the buffer pad and the end of the floating valve away from the top cover form the driving chamber, and the piston rod can reciprocate between the front and rear of the air nail gun.

4. The pneumatic switch structure according to claim 3, characterized in that: A second sealing ring is provided on the outer periphery of the buffer pad.

5. The pneumatic switch structure according to claim 1, wherein: The traveling valve comprises a traveling valve body and a gasket. The elastic member is provided between the traveling valve body and the top cover. The gasket is provided at the connection between the traveling valve body and the elastic member.

6. The pneumatic switch structure according to claim 1 or 5, characterized in that: The elastic member is a compression spring.

7. The pneumatic switch structure according to claim 5, characterized in that: A third sealing ring is provided on the outer periphery of the gasket, and the third sealing ring abuts against the inner wall of the movable cavity of the floating valve.

8. A pneumatic nail gun, characterized in that: The pneumatic switch structure comprises the pneumatic switch structure according to any one of claims 1 to 7.

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