Pneumatic nail gun

Abstract

The utility model discloses a pneumatic nail gun. A nailing mechanism, a driving switch valve and a nailing piston are arranged on a gun body. The gland is provided with an air source air inlet, a main air inlet, a main air outlet, a first air vent, a second air vent, a third air vent, a valve element installation opening and a valve element, the valve element installation opening is plugged by a plugging piece after the valve element enters the gland body from the valve element installation opening, the valve element can reciprocate in the gland body, and the movement direction of the valve element is perpendicular to the movement direction of the nailing piston; the valve element is axially provided with an air inlet channel, so that the main air inlet and the air inlet channel are communicated with the third ventilation opening. When the driving switch valve is not opened and the valve element enables the first air vent, the main exhaust port and the second air vent to be communicated, gas at the top of the nailing piston can be exhausted from the valve element. The main air inlet and the air inlet channel are communicated with the third air vent, and an air source enters to push the nailing piston to move towards the gland to reset. When the driving switch valve is opened, the valve element is pushed by an air source of the air source air inlet in the direction away from the main air inlet, the valve element moves to enable the first air vent, the main exhaust port and the second exhaust port to be communicated, and the air source pushes the nailing piston to move in the direction away from the gland through the first air vent to achieve action of the nailing mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic nail guns. Background Art

[0002] The pneumatic nail gun is driven by a nailing piston to drive the nailing mechanism to achieve the nailing action. The reciprocating speed of the nailing piston becomes the working efficiency indicator of the pneumatic nail gun. In the past, the structure of pneumatic nail guns mostly includes a gland, a valve core and a valve body sleeve. The gland needs to be sealed with the valve body, the valve core needs to be sealed with the valve body sleeve, and the movement direction of the valve core is horizontal to the movement direction of the nailing piston. This will cause the gas to be blocked when the nailing piston is exhausted, resulting in a slower exhaust speed, thereby reducing the working efficiency of the pneumatic nail gun. For this reason, a pneumatic nail gun that can achieve rapid exhaust and is easy to install is provided. Utility Model Content

[0003] The utility model aims to provide a pneumatic nail gun which can quickly exhaust air and is easy to install.

[0004] The above purpose is achieved in this way.

[0005] A pneumatic nail gun comprises a gun body and a gland, wherein the gun body is provided with a nailing mechanism and a driving switch valve and a nailing piston for triggering the action of the nailing mechanism. The gland is provided with an air source air inlet, a main air inlet, a main exhaust port, a first air vent, a second air vent, a third air vent, and a valve core installation port.

[0006] Furthermore, a valve core is provided in the gland body, and the valve core enters the gland body from a valve core installation port. A sealing member is provided at the valve core installation port. After the valve core enters the gland body, the sealing member is used to seal the valve core installation port. The valve core can reciprocate in the gland body, and the movement direction of the valve core is perpendicular to the movement direction of the nailing piston. An air intake channel is axially provided on the valve core, and the air source of the air source inlet port is always connected with the third air vent through the air intake channel.

[0007] Furthermore, when the driving switch valve is not opened, the first end of the valve core seals the main air inlet, opens the second air vent, the first air vent and the main exhaust port are connected via the second air vent, and the remaining gas on the top of the nailing piston is discharged from the main exhaust port via the first air vent and the second air vent. The air source air inlet, the main air inlet and the third air vent are connected, and the air source pushes the nailing piston to move toward the gland direction and reset through the third air vent.

[0008] Furthermore, when the driving switch valve is opened, the pressure at the third air port decreases, and the pressure difference between the main air inlet and the third air port becomes larger, and the air source at the air source inlet pushes the valve core away from the main air inlet, and the front end of the valve core seals the second air port, opening the main air inlet. The first air port is connected to the main exhaust port via the second exhaust port, the first air port is isolated from the main exhaust port, and the main air inlet is connected to the first air port. The air source pushes the nailing piston through the first vent to quickly move away from the pressure cover to realize the action of the nailing mechanism.

[0009] Furthermore, when the driving switch valve is reset to an unopened state, the pressure at the third air vent rises rapidly, and the air source pushes the valve core to reset toward the main air inlet. The valve core resets to seal the main air inlet and opens the second air vent; the first air vent is connected to the main exhaust port via the second air vent, and the main air inlet is connected to the third vent, and the air source pushes the nailing piston to move toward the pressure cover and reset.

[0010] The purpose of the utility model can also be solved by the following technical measures.

[0011] Furthermore, the main exhaust port is provided with a muffler to perform noise reduction treatment on the exhausted gas.

[0012] After adopting the above technical solution, the utility model reduces the valve body sleeve and changes the installation direction of the valve core relative to the nailing piston from the same parallel direction to the mutually perpendicular direction, so that the gas is not blocked during the discharge process, the exhaust becomes smooth, and the nailing piston is quickly reset, realizing the rapid exhaust function of the pneumatic nail gun. At the same time, the cooperation of the rapid exhaust valve core and the pressure cover can make the air source directly act on the nailing piston, so that it drives the nailing mechanism to perform nailing more powerfully, thereby improving the working efficiency of the pneumatic nail gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the internal structure of a pneumatic nail gun.

[0014] Figure 2 This is a simplified schematic diagram of the internal structure of a pneumatic nail gun when the drive switch valve is not open.

[0015] Figure 3 A simplified schematic diagram of the internal structure of a pneumatic nail gun when the drive switch valve is open.

[0016] Figure 4 A top view of the gland of a pneumatic nail gun.

[0017] Figure 5 for Figure 4 AA section view.

[0018] Figure 6 This is the right side view of the pressure cap of the pneumatic nail gun.

[0019] Figure 7 Schematic diagram of the internal structure of the gland. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0021] A pneumatic nail gun includes a gun body 13 and a pressure cover 2. The gun body 13 is provided with a nailing mechanism and a driving switch valve 5 and a nailing piston 11 for triggering the action of the nailing mechanism (the nailing piston of the pneumatic nail gun triggers the nailing mechanism to perform nailing, which is a prior art and will not be described in detail).

[0022] The pressure cover 2 is provided with an air source air inlet 1, a main air inlet 6, a main exhaust port 7, a first air vent 8, a second air vent 9, a third air vent 10, and a valve core installation port 3-2. The main exhaust port is provided with a muffler 12 to perform silencing treatment on the exhausted gas.

[0023] A valve core 3 is provided in the gland 2, and the valve core 3 enters the gland 2 from the valve core installation port 3-2. A sealing member 4 is provided at the valve core installation port. The valve core 3 can reciprocate in the gland 2. The movement direction of the valve core 3 is perpendicular to the movement direction of the nailing piston 11. An air intake channel 3-1 is axially provided on the valve core 3. The air source of the air source inlet 1 is always connected with the third air vent 10 through the air intake channel 3-1.

[0024] When the driving switch valve 5 is in the non-opening state, the first end of the valve core 3 seals the main air inlet 6 and opens the second air vent. At this time, since the second air vent 9 connecting the first air vent 8 and the main exhaust port 7 is opened, the remaining gas on the top of the nailing piston 11 is discharged from the main exhaust port 7 through the first air vent 8 and the second air vent 9. The air source air inlet 1, the main air inlet 6 and the third air vent 10 are connected, and the air source input from the air source air inlet 1 reaches the bottom of the nailing piston 11 through the third air vent 10 to push the nailing piston 11 to move toward the gland 2 to reset.

[0025] When the driving switch valve 5 is in the open state, the pressure of the third air vent 10 decreases, the air pressure difference between the main air inlet 6 and the third air vent 10 increases, and the air source of the air source air inlet 1 pushes the valve core 3 to move away from the main air inlet 6. The head end of the valve core 3 seals the second air vent 9 and opens the main air inlet 6. At this time, since the second air vent 9 connecting the first air vent 8 and the main exhaust port 7 is sealed, the gas on the top of the piston cannot be discharged from the main exhaust port 6 through the first air vent 8 and the second air vent 9. At this time, the main air inlet 6 is open, and the main air inlet 6 is connected to the first air vent 8. The air source reaches the top of the nailing piston 11 through the first air vent 8 and pushes the nailing piston 11 to move quickly away from the gland 2 to trigger the nailing mechanism to perform the nailing action.

[0026] When the switch valve 5 is driven to reset to the closed state, the pressure at the third vent 10 rises rapidly, and the gas source pushes the valve core 3 to reset in the direction close to the main air inlet 6. The valve core 3 resets and seals the main air inlet 6, and opens the second vent 9. At this time, the second vent 9 connecting the first vent 8 and the main exhaust port 7 is opened, and the remaining gas on the top of the nailing piston 11 is discharged from the main exhaust port 7 through the first vent 8 and the second vent 9. The gas source inlet 1, the main air inlet 6 and the third vent 10 are connected, and the gas source input from the gas source inlet 1 reaches the bottom of the nailing piston 11 through the third vent 10, pushing the nailing piston 11 to move close to the gland 2 and reset.

Claims

1. A pneumatic nail gun, comprising a gun body and a gland, the gun body is provided with a nailing mechanism, and a driving switch valve and a nailing piston for triggering the action of the nailing mechanism, the gland is provided with an air source air inlet and a valve core installation port, and the gland body is provided with a valve core, characterized in that: The valve core enters the gland body from the valve core installation port, the valve core installation port is provided with a blocking piece, the gland is also provided with a main air inlet, a main air outlet, a first air vent, a second air vent and a third air vent, the valve core can reciprocate in the gland body, the movement direction of the valve core is perpendicular to the movement direction of the nailing piston, the valve core is axially provided with an air inlet channel, the air source enters from the air source air inlet through the main air inlet and the air inlet channel and is always connected with the third air vent; When the driving switch valve is not opened, the first end of the valve core seals the main air inlet, opens the second air vent, the first air vent, the second air vent and the main exhaust port are connected, the air source air inlet, the main air inlet and the third air vent are connected, and the air source pushes the nailing piston to move toward the gland and reset; When the driving switch valve is opened, the pressure at the third vent drops, and the valve core is pushed away from the main air inlet by the air source of the air source inlet. The first end of the valve core seals the second vent, opens the main air inlet, and separates the first vent from the main exhaust port. The main air inlet is connected to the first vent, and the air source pushes the nailing piston to move away from the gland to realize the action of the nailing mechanism. When the switch valve is driven to reset and return to the unopened state, the pressure at the third air vent rises rapidly, and the air source pushes the valve core toward the main air inlet to reset it. The valve core resets and seals the main air inlet, opening the second air vent. The first air vent and the second air vent are connected to the main exhaust port, and the main air inlet is connected to the third vent. The air source pushes the nailing piston toward the pressure cover to reset it.

2. The pneumatic nail gun according to claim 1, characterized in that: The main exhaust port is provided with a muffler.

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