Pneumatic nail gun and single-shot and continuous-shot switching mechanism thereof

Abstract

The utility model relates to the technical field of pneumatic nail guns, in particular to a pneumatic nail gun and a single and continuous striking switching mechanism thereof, which comprise a switch main body, a single connecting valve and a trigger, a single-connection control cavity is formed in the switch main body and is respectively communicated with a gun needle reset air chamber and a switch piston air chamber of the pneumatic nail gun; the single-connection valve is arranged in the single-connection control cavity, one end of the single-connection valve can penetrate through the single-connection control cavity to extend outwards, and a movable groove is formed in the side, located outside the switch body, of the single-connection valve. The trigger is provided with a control protrusion, and the control protrusion extends into the movable groove. When the control protrusion slides along the movable groove, the single connection valve seals an air channel of the gun needle reset air chamber and an air channel of the switch piston air chamber. When the control protrusion drags the single connection valve to slide, the gun needle reset air chamber is communicated with the switch piston air chamber. The device is simple in structure, the single-shot mode and the continuous-shot mode are switched through the pressing amplitude of the trigger, and the switching step is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic nail guns, in particular to a pneumatic nail gun and a single-strike conversion mechanism thereof. Background Art

[0002] Pneumatic nail guns are also called pneumatic nailing machines. Pneumatic nail guns use the air pressure generated by the air pump (air compressor). The high-pressure gas drives the firing pin in the nail gun cylinder to do hammering motion, nailing the nails in the nail clip into the object or shooting the nails out. Pneumatic nail guns are available in single-shot and continuous-shot, and also in single- and continuous-shot conversion. However, the common single- and continuous-shot conversion structure is relatively complex, resulting in high manufacturing costs, cumbersome single- and continuous-shot conversion steps, and low continuous-shot efficiency. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art. The utility model provides a pneumatic nail gun and a single-to-continuous-fire conversion mechanism thereof, which has a simple structure, simple steps for single-to-continuous-fire conversion and high continuous-fire efficiency.

[0004] In order to solve the above problems, the utility model proposes a single-strike conversion mechanism for a pneumatic nail gun, which is characterized by comprising a switch body, a single-strike valve and a trigger;

[0005] A single-connection control chamber is provided in the switch body, and the single-connection control chamber is communicated with the needle reset air chamber and the switch piston air chamber of the pneumatic nail gun respectively; the single-connection valve is provided in the single-connection control chamber, and one end of the single-connection valve can extend outward through the single-connection control chamber, and a movable groove is provided on one side of the single-connection valve outside the switch body; a control protrusion is provided at the trigger, and the control protrusion extends into the movable groove;

[0006] When the control protrusion slides along the movable groove, the one-way valve closes the air passages of the gun needle reset air chamber and the switch piston air chamber; when the control protrusion drags the one-way valve to slide, the gun needle reset air chamber and the switch piston air chamber are connected.

[0007] As an improvement of the above technical solution, the inner wall of the single-connection control cavity is respectively provided with a first air hole connected to the needle reset air chamber and a second air hole connected to the switch piston air chamber;

[0008] The single-connection valve comprises a valve body and a sealing portion, one end of the valve body is provided with the sealing portion, the other end passes through the single-connection control cavity and extends outward, and one side outside the switch body is provided with the movable groove;

[0009] When the control protrusion slides along the movable groove, the sealing portion seals the first air hole; when the control protrusion drags the one-way valve to slide, the first air hole is communicated with the second air hole.

[0010] As an improvement of the above technical solution, two sealing rings are provided on the sealing portion, and the first air hole of the single-connected control cavity is located between the two sealing rings;

[0011] When the control protrusion slides along the movable groove, the sealing ring seals the first air hole; when the control protrusion drags the one-way valve to slide, the sealing ring slides over the second air hole, and the first air hole is connected with the second air hole.

[0012] As an improvement of the above technical solution, a spring is provided between the sealing portion and the single-connection control chamber, and the spring is sleeved on the valve body.

[0013] As an improvement of the above technical solution, the sealing ring is made of nitrile rubber or silicone rubber.

[0014] As an improvement of the above technical solution, an air supply channel is provided in the switch body, and the air supply channel is used to connect the gun needle reset air chamber and the single-connection control chamber; a speed regulating valve is also provided on the side of the switch body, and the speed regulating valve can adjust the gas flow rate of the air supply channel by rotating.

[0015] As an improvement of the above technical solution, when the pressing swing amplitude of the trigger is 3-5°, the control protrusion slides in the movable groove; when the pressing swing amplitude of the trigger is 10-13°, the control protrusion drags the single-connected valve to slide.

[0016] The utility model also provides a pneumatic nail gun, comprising the above-mentioned single-strike conversion mechanism.

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

[0018] The single-shot conversion mechanism of the utility model includes a switch body, a single-shot valve and a trigger; the single-shot valve is arranged in the single-shot control cavity of the switch body, and one end thereof passes through the single-shot control cavity and extends to the outside of the switch body. In particular, a movable groove is arranged on the side of the single-shot valve, and the control protrusion at the trigger extends into the movable groove; by controlling the pressing amplitude of the trigger, the control protrusion slides in the movable groove or drives the single-shot valve to slide, so that the single-shot valve controls whether the gun needle reset air chamber is connected to the switch piston air chamber. Compared with the prior art, the utility model has a simple structure, and the switching between the single and continuous shooting modes of the pneumatic nail gun can be controlled only by controlling the pressing amplitude of the trigger, and the structure is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of a single-strike conversion mechanism according to an embodiment of the utility model;

[0020] Figure 2 yes Figure 1 A magnified view of point A;

[0021] Figure 3 It is a cross-sectional view of a single-connection valve according to an embodiment of the utility model;

[0022] Figure 4 This is a single-shot working view of a single-shot conversion mechanism in one embodiment of the utility model;

[0023] Figure 5 This is a continuous shooting working view of a single continuous shooting conversion mechanism according to an embodiment of the utility model. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0025] See also Figures 1 to 5 As shown, the utility model provides a single-strike conversion mechanism of a pneumatic nail gun, comprising a switch body 1, a single-strike valve 2 and a trigger 3.

[0026] The utility model improves the connection mode between the air chambers of the switch body, thereby simplifying the switching steps between the single-shot mode and the continuous-shot mode.

[0027] Specifically, a single-connection control chamber 11 is provided in the switch body 1, and the single-connection control chamber 11 is communicated with the needle reset air chamber 1' and the switch piston air chamber 2' of the pneumatic nail gun respectively; the single-connection valve 2 is provided in the single-connection control chamber 11, and one end of the single-connection valve 2 can extend outward through the single-connection control chamber 11, and a movable groove 23 is provided on one side of the single-connection valve 2 located outside the switch body 1; a control protrusion 31 is provided at the trigger 3, and the control protrusion 31 extends into the movable groove 23;

[0028] When the control protrusion 31 slides along the movable groove 23, the one-way valve 2 closes the air passages of the needle reset air chamber 1' and the switch piston air chamber 2'; when the control protrusion 31 drags the one-way valve 2 to slide, the needle reset air chamber 1' and the switch piston air chamber 2' are connected.

[0029] It should be noted that, when the control protrusion 31 of the trigger 3 only slides along the movable groove 23, the gun needle reset air chamber 1' and the switch piston air chamber 2' are completely in an isolated state. At this time, the pneumatic nail gun is in a single-shot mode, and the trigger 3 drives the switch ejector pin 3' of the pneumatic nail gun to slide, thereby releasing the sealing state of the switch piston air chamber 2', allowing the switch piston to slide and then the nail gun enters a firing state; when the control protrusion 31 of the trigger 3 drags the single-connected valve 2 to slide, the gun needle reset air chamber 1' and the switch piston air chamber 2' are connected, so that when the gun needle resets after firing, the high-pressure gas can flow back from the needle reset air chamber 1' to the switch piston air chamber 2', so that the switch piston can reciprocate at a certain frequency in the switch piston air chamber 2' when the switch ejector pin does not seal the switch piston air chamber, thereby realizing the continuous firing mode of the pneumatic nail gun.

[0030] The single-continuous shot conversion mechanism of the utility model comprises a switch body 1, a single-connected valve 2 and a trigger 3; the single-connected valve 2 is arranged in the single-connected control chamber 11 of the switch body 1, and one end thereof passes through the single-connected control chamber 11 and extends to the outside of the switch body 1. In particular, a movable groove 23 is arranged on the side of the single-connected valve 2, and a control protrusion 31 at the trigger 3 extends into the movable groove 23; by controlling the pressing amplitude of the trigger 3, the control protrusion 31 slides in the movable groove 23 or drives the single-connected valve 2 to slide, so that the single-connected valve 2 controls whether the gun needle reset air chamber 2' is connected with the switch piston air chamber 1'. Compared with the prior art, the utility model has a simple structure, and the single-continuous shot mode switching of the pneumatic nail gun can be controlled only by controlling the pressing amplitude of the trigger 3, and the structure is safe and reliable.

[0031] Preferably, the inner wall of the single-connection control chamber 11 is respectively provided with a first air hole 12 communicating with the needle reset air chamber 1', and a second air hole 13 communicating with the switch piston air chamber 2';

[0032] The single-connection valve 2 comprises a valve body 21 and a sealing portion 22. The sealing portion 22 is provided at one end of the valve body 21, and the other end extends outward through the single-connection control chamber 11. The movable groove 23 is provided at one side outside the switch body 1.

[0033] When the control protrusion 31 slides along the movable groove 23, the sealing portion 22 seals the first air hole 12; when the control protrusion 31 drags the one-way valve 2 to slide, the first air hole 12 is connected with the second air hole 13. In this embodiment, the sealing portion 22 of the one-way valve 2 controls whether the first air hole 12 is connected with the second air hole 13.

[0034] More preferably, two sealing rings 25 are provided on the sealing portion 22, and the first air hole 12 of the single-connected control chamber 11 is located between the two sealing rings 25;

[0035] When the control protrusion 31 slides along the movable groove 23, the sealing ring 25 seals the first air hole 12; when the control protrusion 31 drags the single-connection valve 2 to slide, the sealing ring 25 slides over the second air hole 13, and the first air hole 12 is connected with the second air hole 13. Preferably, the sealing ring 25 is made of nitrile rubber or silicone rubber.

[0036] It should be noted that a sealed transition air chamber is formed between the sealing portion 22, the sealing ring 25 and the single-connection control chamber 11. When the control protrusion 31 of the trigger 3 slides in the movable groove 23, the first air hole 12 is connected to the transition air chamber, while the second air hole 13 is located outside the transition air chamber, and the first air hole 12 and the second air hole 13 cannot be connected; when the control protrusion 31 of the trigger 3 drags the single-connection valve 2 to slide, the sealing ring 25 passes over the second air hole 13, so that the second air hole can be connected to the first air hole 12 through the transition air chamber.

[0037] Preferably, a spring 24 is provided between the sealing portion 22 and the single-connection control chamber 11, and the spring sleeve 24 is provided on the valve body 21. Due to the provision of the spring 24, when the trigger 3 removes the pulling force on the single-connection valve 2, the single-connection valve 2 can automatically reset, so that the sealing portion 22 can automatically seal the first air hole 12 and automatically switch back to the single-shot mode.

[0038] Preferably, the switch body 1 is provided with an air supply passage 14, and the air supply passage 14 is used to connect the gun needle reset air chamber 1' and the single connection control chamber 11; the side of the switch body 1 is also provided with a speed regulating valve 151, and the speed regulating valve 15 can adjust the gas flow of the air supply passage 14 by rotation. The speed regulating valve 15 can control the gas flow of the air supply passage 14 according to the rotation angle through the rotary speed regulating valve 15, thereby adjusting the striking frequency of the burst mode.

[0039] Preferably, when the pressing swing amplitude of the trigger 3 is 3-5°, the control protrusion 31 slides in the movable groove 23; when the pressing swing amplitude of the trigger 3 is 10-13°, the control protrusion 31 drags the single-connected valve 2 to slide.

[0040] The utility model also provides a pneumatic nail gun, characterized in that it comprises the above-mentioned single-strike conversion mechanism.

[0041] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A single-strike conversion mechanism for a pneumatic nail gun, characterized in that: It includes a switch body, a single-connection valve and a trigger; A single-connection control chamber is provided in the switch body, and the single-connection control chamber is communicated with the needle reset air chamber and the switch piston air chamber of the pneumatic nail gun respectively; the single-connection valve is provided in the single-connection control chamber, and one end of the single-connection valve can extend outward through the single-connection control chamber, and a movable groove is provided on one side of the single-connection valve outside the switch body; a control protrusion is provided at the trigger, and the control protrusion extends into the movable groove; When the control protrusion slides along the movable groove, the one-way valve closes the air passages of the gun needle reset air chamber and the switch piston air chamber; when the control protrusion drags the one-way valve to slide, the gun needle reset air chamber and the switch piston air chamber are connected.

2. The single-strike conversion mechanism according to claim 1, characterized in that: The inner wall of the single-connection control cavity is respectively provided with a first air hole connected to the needle reset air chamber and a second air hole connected to the switch piston air chamber; The single-connection valve comprises a valve body and a sealing portion, wherein the sealing portion is provided at one end of the valve body, and the other end extends outward through the single-connection control cavity, and the movable groove is provided at one side outside the switch body; When the control protrusion slides along the movable groove, the sealing portion seals the first air hole; when the control protrusion drags the one-way valve to slide, the first air hole is communicated with the second air hole.

3. The single-strike conversion mechanism according to claim 2, characterized in that: The sealing portion is provided with two sealing rings, and the first air hole of the single-connection control cavity is located between the two sealing rings; When the control protrusion slides along the movable groove, the sealing ring seals the first air hole; when the control protrusion drags the one-way valve to slide, the sealing ring slides over the second air hole, and the first air hole is connected with the second air hole.

4. The single-strike conversion mechanism according to claim 2 or 3, characterized in that: A spring is arranged between the sealing portion and the single-connection control chamber, and the spring is sleeved on the valve body.

5. The single-strike conversion mechanism according to claim 3, characterized in that: The sealing ring is made of nitrile rubber or silicone rubber.

6. The single-strike conversion mechanism according to claim 1, characterized in that: An air supply passage is arranged in the switch body, and the air supply passage is used to connect the needle reset air chamber and the single-connection control chamber; a speed regulating valve is also arranged on the side of the switch body, and the speed regulating valve can adjust the gas flow of the air supply passage by rotating.

7. The single-strike conversion mechanism according to claim 1, characterized in that: When the pressing swing amplitude of the trigger is 3-5°, the control protrusion slides in the movable groove; when the pressing swing amplitude of the trigger is 10-13°, the control protrusion drags the single-connected valve to slide.

8. A pneumatic nail gun, characterized in that: It comprises a single-stroke conversion mechanism as described in any one of claims 1-7.

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