Percussion control mechanism of pneumatic nail gun

Abstract

The utility model relates to a percussion control mechanism of a pneumatic nail gun, which comprises a handle, a trigger, a valve rod, an air guide rod, an air cylinder and a piston firing pin component, an air storage cavity communicated with external compressed air is arranged in the handle, a driving cavity communicated with the air cylinder is arranged in the handle, an air hole communicated between the air storage cavity and the driving cavity is arranged in the handle, and the piston firing pin component is arranged in the air hole. A balance valve used for controlling the air hole to be opened or closed is arranged in the handle, a control cavity used for controlling the balance valve to execute the opening or closing action is arranged in the handle, the air guide rod is communicated between the air storage cavity and the control cavity, the valve rod is arranged in an exhaust hole of the handle, and a sealing ring matched with the exhaust hole is arranged at one end of the valve rod. The other end of the valve rod is provided with a conical protruding part matched with the air guide hole of the air guide rod, the conical protruding part acts along with the valve rod and abuts against the air guide hole, and opening or closing of the air guide hole is achieved. The pneumatic nail gun has the advantages of being simple in structure, convenient to operate and stable and reliable in performance.

Description

Technical Field

[0001] The utility model relates to a pneumatic nail gun, in particular to a firing control mechanism of a pneumatic nail gun. Background Art

[0002] A pneumatic nail gun is also called a pneumatic nail driver. The pneumatic nail gun uses the air pressure generated by an air pump (air compressor). The high-pressure gas drives the striker in the cylinder of the nail gun to do a hammering motion, so as to drive the row nails in the row nail clip into an object or shoot out the row nails. The gun body assembly is composed of a gun body, a cylinder, a firing control mechanism, a striker assembly (gun tongue), a buffer pad, a gun nozzle, a gun groove, etc. By using the pressure difference between compressed air and the atmosphere, the striker (piston) makes a reciprocating motion in the cylinder through the firing control mechanism. The magazine assembly is composed of accessories such as a gun head, a gun cover, a fixed magazine, and a movable magazine. The nails are sent to the gun cover groove through a compression spring or a tension spring. When the striker comes out of the gun nozzle, the nails are driven out. The structural design of the existing firing control mechanism of the pneumatic nail gun is relatively complex, and the trigger of the firing control mechanism cannot reliably drive the air guide rod to act, so the working stability is relatively poor. Summary of the Invention

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a firing control mechanism of a pneumatic nail gun with a simple structure, convenient operation, and stable and reliable performance.

[0004] To achieve the above purpose, the utility model adopts a firing control mechanism of a pneumatic nail gun, which includes a handle, a trigger rotatably arranged on the handle, a valve rod movably arranged on the handle and in linkage cooperation with the trigger, an air guide rod arranged in the handle and in cooperation with the valve rod, a cylinder arranged in the handle, and a piston striker assembly arranged in the cylinder. A gas storage cavity communicated with external compressed air is arranged in the handle, a driving cavity communicated with the cylinder is arranged in the handle, an air hole communicated between the gas storage cavity and the driving cavity is arranged in the handle, a balance valve for controlling the opening or closing of the air hole is arranged in the handle, a control cavity for controlling the balance valve to perform the opening or closing action is arranged in the handle, the air guide rod is communicated between the gas storage cavity and the control cavity, the valve rod is arranged in the exhaust hole of the handle, a sealing ring matched with the exhaust hole is arranged at one end of the valve rod, a conical convex part matched with the air guide hole of the air guide rod is arranged at the other end of the valve rod, and the conical convex part moves with the valve rod and abuts against the air guide hole to realize the opening or closing of the air guide hole.

[0005] The beneficial effects of the above structure are as follows: The firing control mechanism uses compressed air as power to control the action of the balance valve to achieve the firing action of the nail gun. The trigger cooperates with the valve rod through the conical protrusion of the valve rod, which can ensure that the trigger can reliably drive the valve rod to move, which is beneficial to improving the working reliability of the firing control mechanism. In the initial state, when the air source is connected, the air storage cavity is filled with compressed air. The compressed air pushes the valve rod to move through the air guide rod, the air guide hole of the air guide rod opens, and the compressed air enters the control cavity. Pressure is generated in the control cavity and drives the balance valve to act, and the balance valve closes the air hole. When firing the nail gun, pull the trigger, the trigger drives the valve rod to move, the valve rod closes the air guide hole of the air guide rod, and at the same time, the compressed air in the control cavity is discharged from the exhaust hole, the pressure in the control cavity becomes smaller, the balance valve opens the air hole, the air storage cavity is connected to the driving cavity, the compressed air enters the control cavity, and the compressed air in the control cavity enters the cylinder and pushes the piston and striker assembly to move, so as to achieve the firing of the nail gun. Therefore, the firing control mechanism of this pneumatic nail gun has the advantages of simple structure, convenient operation, stable and reliable performance.

[0006] Particularly, one end of the valve rod has a convex curved surface that cooperates with the trigger, and an arc-shaped convex portion that cooperates with the convex curved surface is provided on the trigger. The arc-shaped convex portion moves with the trigger and abuts against the convex curved surface, and constitutes the linkage cooperation between the valve rod and the arc-shaped convex portion. The trigger drives the convex curved surface of the valve rod through the arc-shaped convex portion, which can ensure that the trigger can reliably drive the valve rod to move, which is beneficial to improving the working reliability of the firing control mechanism.

[0007] Particularly, the piston and striker assembly includes a piston movably arranged in the cylinder and a striker linked to the piston. A slot that cooperates with the striker is provided on the piston. One end of the striker has an insertion portion inserted into the slot, and a pin connected to the insertion portion is provided on the piston. The striker is inserted into the slot of the piston, and the striker and the piston are connected by a pin, which is convenient for the assembly of the piston and the striker, and the assembly is more convenient.

[0008] Particularly, a sealing groove is provided on the outer peripheral wall of the piston, and an O-ring that is hermetically fitted with the cylinder is provided in the sealing groove. The O-ring can play a sealing role, which can ensure that the piston and striker assembly can move reliably in the cylinder, which is beneficial to improving the working reliability of the firing control mechanism.

[0009] Particularly, a shock-absorbing washer is provided between the cylinder and the handle. The shock-absorbing washer can play a shock-absorbing role, which can ensure that the connection between the cylinder and the handle is more compact. Description of the Drawings

[0010] Figure 1 It is the internal structure diagram of the embodiment of the present invention.

[0011] Figure 2This is a perspective view of the piston striker assembly according to an embodiment of the present utility model. Detailed implementation manners

[0012] Such as Figure 1 , 2As shown, the embodiment of the present invention is a firing control mechanism of a pneumatic nail gun, comprising a handle 10, a trigger 11 rotatably arranged on the handle 10, a valve stem 12 movably arranged on the handle 10 and cooperating with the trigger 11, an air guide rod 13 arranged in the handle 10 and cooperating with the valve stem 12, a cylinder 14 arranged in the handle 10, and a piston striker assembly 20 arranged in the cylinder 14. The handle 10 is provided with an air storage chamber 100 connected to external compressed air, the handle 10 is provided with a drive chamber 101 connected to the cylinder 14, the handle 10 is provided with an air hole 102 connected between the air storage chamber 100 and the drive chamber 101, and the handle 10 is provided with a balancing valve 15 for controlling the opening or closing of the air hole 102, and the handle 10 is provided with a control chamber 103 for controlling the balancing valve 15 to perform an opening or closing action. The air guide rod 13 is connected between the air storage chamber 100 and the control chamber 103, and the valve stem 12 is provided in the exhaust hole 104 of the handle 10. A sealing ring 16 is provided on one end of the valve stem 12 to cooperate with the exhaust hole 104, and the other end of the valve stem 12 has a conical protrusion 121 that cooperates with the air guide hole 131 of the air guide rod 13. The conical protrusion 121 moves with the valve stem 12 and contacts the air guide hole 131, thereby realizing the opening or closing of the air guide hole 131. The valve stem 12 has a raised curved surface 122 on one end that mates with the trigger 11. The trigger 11 is provided with a curved raised portion 111 that mates with the raised curved surface 122. The curved raised portion 111 moves with the trigger 11 and abuts against the raised curved surface 122, forming a coordinated connection between the valve stem 12 and the curved raised portion 122. The trigger drives the raised curved surface of the valve stem via the curved raised portion, thereby ensuring that the trigger can reliably drive the valve stem, thereby improving the operational reliability of the firing control mechanism. A shock-absorbing washer 17 is provided between the cylinder 14 and the handle 10. This shock-absorbing washer provides a shock-absorbing effect, ensuring a more compact connection between the cylinder and the handle. The piston striker assembly 20 includes a piston 21 movably arranged in the cylinder 14, and a striker 22 linked to the piston 21. The piston 21 is provided with a slot 211 that matches the striker 22. One end of the striker 22 has a plug-in portion 221 inserted into the slot 211. The piston 21 is provided with a pin 23 connected to the plug-in portion 221. The striker is inserted into the slot of the piston, and the striker and the piston are connected by a pin, which facilitates the assembly of the piston and the striker and makes the assembly more convenient. A sealing groove 212 is provided on the outer peripheral wall of the piston 21, and an O-ring 24 that seals with the cylinder 14 is provided in the sealing groove 212. The O-ring can play a sealing role, which can ensure that the piston striker assembly can operate reliably in the cylinder, which is beneficial to improving the working reliability of the firing control mechanism.

[0013] The firing control mechanism uses compressed air as power to control the action of the balance valve to achieve the firing action of the nail gun. The trigger cooperates with the air guide rod through the conical protrusion of the valve rod, which can ensure that the trigger can reliably drive the valve rod to act, which is beneficial to improving the working reliability of the firing control mechanism. In the initial state, when the air source is connected, the air storage cavity is filled with compressed air. The compressed air pushes the valve rod to act through the air guide rod, and the air guide hole of the air guide rod is opened. The compressed air enters the control cavity, generates pressure in the control cavity and drives the balance valve to act, and the balance valve closes the air hole. When firing the nail gun, pull the trigger, the trigger drives the valve rod to act, the valve rod closes the air guide hole of the air guide rod, and at the same time, the compressed air in the control cavity is discharged from the exhaust hole, the pressure in the control cavity becomes smaller, the balance valve opens the air hole, the air storage cavity is connected to the driving cavity, the compressed air enters the control cavity, and the compressed air in the control cavity enters the cylinder and pushes the piston and striker assembly to move, so as to achieve the firing of the nail gun. Therefore, the firing control mechanism of this pneumatic nail gun has the advantages of simple structure, convenient operation, stable and reliable performance.

Claims

1. A firing control mechanism for a pneumatic nail gun, characterized in that: It includes a handle, a trigger rotatably arranged on the handle, a valve rod movably arranged on the handle and in linkage cooperation with the trigger, a gas guide rod arranged in the handle and cooperating with the valve rod, a cylinder arranged in the handle, and a piston striker assembly arranged in the cylinder. A gas storage cavity communicating with external compressed air is arranged in the handle. A driving cavity communicating with the cylinder is arranged in the handle. An air hole communicating between the gas storage cavity and the driving cavity is arranged in the handle. A balance valve for controlling the opening or closing of the air hole is arranged in the handle. A control cavity for controlling the balance valve to perform the opening or closing action is arranged in the handle. The gas guide rod communicates between the gas storage cavity and the control cavity. The valve rod is arranged in the exhaust hole of the handle. A sealing ring cooperating with the exhaust hole is arranged at one end of the valve rod. The other end of the valve rod has a conical convex portion cooperating with the air guide hole of the gas guide rod. The conical convex portion moves with the valve rod and abuts against the air guide hole, and realizes the opening or closing of the air guide hole.

2. The firing control mechanism of the pneumatic nail gun according to claim 1, characterized in that: A convex curved surface cooperating with the trigger is arranged at one end of the valve rod. An arc convex portion cooperating with the convex curved surface is arranged on the trigger. The arc convex portion moves with the trigger and abuts against the convex curved surface, and constitutes the linkage cooperation between the valve rod and the arc convex portion.

3. The firing control mechanism of the pneumatic nail gun according to claim 1 or 2, characterized in that: The piston striker assembly includes a piston movably arranged in the cylinder and a striker linked to the piston. A slot cooperating with the striker is arranged on the piston. One end of the striker has an insertion portion inserted into the slot. A pin connected to the insertion portion is arranged on the piston.

4. The firing control mechanism of the pneumatic nail gun according to claim 3, characterized in that: A sealing groove is arranged on the outer peripheral wall of the piston. An O-ring for sealing cooperation with the cylinder is arranged in the sealing groove.

5. The firing control mechanism of the pneumatic nail gun according to claim 1 or 2, characterized in that: A shock-absorbing washer is arranged between the cylinder and the handle.

Images