Air nail gun with built-in air compressor

Abstract

An air nail gun with a built-in air compressor comprises a gun shell, an end cover, a piston firing pin assembly, an on-off valve, a partition piece, a first air path, a second air path, an air compressor assembly, an electromagnetic valve, a trigger switch and a power supply module. The small air compressor assembly is directly arranged on the gun shell, and meanwhile, the power supply module is arranged to provide electric energy for the small air compressor assembly, so that the air nail gun is convenient to carry and use outdoors, and the limitation in use is overcome.

Description

Technical Field

[0001] The utility model relates to a pneumatic nail gun with an air compressor built therein. Background Art

[0002] A pneumatic nail gun is a driving device that consumes compressed air as a driving power source. Generally, an air inlet joint is configured at the bottom of its gun body, and an air path connection is formed with an external air compressor through the air inlet joint. The air compressor, in turn, requires a corresponding input power supply to provide electrical energy input. This results in inconvenience when the existing pneumatic nail gun is carried out for use, that is, there are always certain limitations in the use process of the existing pneumatic nail gun.

[0003] In addition, in the structure of the existing pneumatic nail gun, there are many components, and it is inconvenient to assemble and maintain. Moreover, basically no pressure switch is configured in the existing pneumatic nail gun, and the nail driving force cannot be guaranteed. Summary of the Invention

[0004] In view of the deficiencies existing in the above problems, the utility model provides a pneumatic nail gun with an air compressor built therein.

[0005] To achieve the above object, the utility model provides a pneumatic nail gun with an air compressor built therein, including:

[0006] A gun housing and an end cap, the end cap is sealingly connected to the right side of the gun housing;

[0007] A piston and striker assembly, the piston and striker assembly includes a piston cylinder fixedly installed in the gun housing, a piston slidably disposed in the piston cylinder, and a striker fixedly connected to one side of the piston;

[0008] An opening and closing valve, the opening and closing valve is installed in the end cap. The opening and closing valve includes a first valve core and a second valve core. A valve core spring is connected between the first valve core and the second valve core to enable the first valve core to move relative to the second valve core. The first valve core, the second valve core and the inner wall surface of the end cap enclose an opening and closing valve air chamber. A through middle hole is processed in the middle of the first valve core; when the first valve core plugs the end of the piston cylinder, the middle hole communicates with the outside through an end cap hole on the end cap. When the first valve core is separated from the end of the piston cylinder, the middle hole is blocked by a rubber pad arranged in the middle of the end cap;

[0009] A partition member, the partition member is installed in the gun housing. The partition member partitions the space between the gun housing and the piston cylinder to form a main air chamber and a storage air chamber. The piston cylinder has a one-way air hole flowing unidirectionally towards the storage air chamber, and the partition member has a return air hole flowing back from the storage air chamber to the piston cylinder;

[0010] A first air passage and a second air passage, the first air passage being formed on the gun housing and communicating with the main air chamber, and the second air passage being formed on the gun housing and the end cover and communicating with the opening and closing valve air chamber;

[0011] An air compressor assembly, the air compressor assembly being arranged on the pneumatic nail gun, and the air compressor assembly being used to supplement high-pressure gas into the main air chamber;

[0012] A solenoid valve, the solenoid valve being arranged on the pneumatic nail gun, the solenoid valve having an air inlet end, an air outlet end, and an exhaust end, the air inlet end being connected to the first air passage, the air outlet end being connected to the second air passage, and the exhaust end being in communication with the outside;

[0013] A trigger switch, the trigger switch being arranged on the pneumatic nail gun, and the trigger switch being used to control the on-off of the solenoid valve;

[0014] A power supply module, the power supply module being arranged on the pneumatic nail gun, and the power supply module being used to supply power for the operation of the air compressor assembly and the solenoid valve.

[0015] Furthermore, the partition member is a sleeve, and the sleeve is concentrically sleeved outside the piston cylinder, so that the inner cavity of the piston cylinder, the air storage chamber, and the main air chamber form a three-layer distribution structure from the inside to the outside along the same axis line.

[0016] Furthermore, the air compressor assembly includes an air compressor motor, an air compressor storage cylinder, and a first pressure switch for controlling the start and stop of the operation of the air compressor motor. The air compressor storage cylinder is in communication with the main air chamber. The first pressure switch is used to monitor the pressure value of the main air chamber and keep the gas pressure in the main air chamber within a set range. When the gas pressure is higher than the upper limit value of the set range, the air compressor motor stops working. When the gas pressure is lower than the lower limit value of the set range, the air compressor motor starts working.

[0017] Furthermore, a gas release valve is arranged on the air compressor storage cylinder.

[0018] Furthermore, a second pressure switch is further included. The second pressure switch is arranged on one side of the gun housing for detecting the pressure of the main air chamber. The second pressure switch is a normally open switch. When the pressure of the main air chamber reaches the set value, the second pressure switch closes the circuit so that the pneumatic nail gun can perform a nailing action.

[0019] Furthermore, a safety bracket, a safety bracket return spring, and a safety bracket trigger switch are further included. The safety bracket, the safety bracket return spring, and the safety bracket trigger switch are all arranged on one side of the gun housing. The safety bracket trigger switch is a normally open switch. When the safety bracket is pressed in place, the safety bracket trigger switch closes the circuit to ensure nailing safety.

[0020] Further, it further includes a main switch, and the power supply module is a detachable lithium battery pack.

[0021] Further, in terms of circuit wiring control, the trigger switch, the second pressure switch, the safety trigger switch, and the main switch are connected in series and then electrically connected to the positive and negative poles of the power supply module, and the first pressure switch and the main switch are connected in series and then electrically connected to the positive and negative poles of the power supply module.

[0022] Further, the power supply module is a power-connected type.

[0023] The beneficial effects of the present utility model compared with the prior art are as follows: A small air compressor assembly is directly configured on the gun housing, and at the same time, a power supply module is configured to provide electrical energy for the small air compressor assembly, which is convenient for the carrying and outdoor use of the pneumatic nail gun and overcomes the limitations in use.

[0024] The structure of the pneumatic nail gun is designed compactly and reasonably, is convenient to assemble and maintain, enables the pneumatic nail gun to have a longer service life. In addition, through the configuration of multiple pressure switches, the nail driving force of the pneumatic nail gun can always be ensured. Description of the Drawings

[0025] Figure 1 is a perspective view of a pneumatic nail gun with an air compressor built therein according to the present utility model;

[0026] Figure 2 is a perspective view of a pneumatic nail gun with an air compressor built therein according to the present utility model;

[0027] Figure 3 is a cross-sectional view of a pneumatic nail gun with an air compressor built therein according to the present utility model (in the firing state);

[0028] Figure 4 is a cross-sectional view of a pneumatic nail gun with an air compressor built therein according to the present utility model (in the standby state);

[0029] Figure 5 is a cross-sectional view of a pneumatic nail gun with an air compressor built therein according to the present utility model;

[0030] Figure 6 is a cross-sectional view of a pneumatic nail gun with an air compressor built therein according to the present utility model;

[0031] Figure 7 is an electrical wiring diagram of a pneumatic nail gun with an air compressor built therein according to the present utility model;

[0032] Figure 8 is for Figure 7 the corresponding circuit system diagram;

[0033] Figure 9Schematic diagram of the gas path connection between the air compressor storage cylinder and the main air chamber (the arrow indicates the gas flow direction).

[0034] In the figure: 1. Gun housing; 2. End cover; 21. End cover hole; 3. Piston striker assembly; 31. Piston cylinder; 311. Unidirectional air hole; 32. Piston; 33. Striker; 4. Opening and closing valve; 41. First valve core; 411. Middle hole; 42. Valve core spring; 43. Second valve core; 5. Rubber pad; 6. Partition member; 61. Return air hole; 7. Air compressor assembly; 71. Air compressor motor; 72. Air compressor storage cylinder; 73. First pressure switch; 74. Air release valve; 8. Solenoid valve; 9. Trigger switch; 10. Power supply module; 11. Second pressure switch; 12. Safety bracket; 13. Safety bracket return spring; 14. Safety bracket trigger switch; 15. Main switch; a. Opening and closing valve air chamber; b. Main air chamber; c. Storage air chamber; d. First gas path; e. Second gas path. Specific implementation mode

[0035] Example 1: As Figures 1 - 8As shown in the figure, a pneumatic nail gun with an air compressor built-in according to an embodiment of the present utility model includes a gun housing 1 and an end cap 2, and the end cap 2 is sealingly connected to the right side of the gun housing 1; a piston striker assembly 3 is disposed inside the gun housing 1, and the piston striker assembly 3 includes a piston cylinder 31 fixedly installed inside the gun housing 1, a piston 32 slidably disposed inside the piston cylinder 31, and a striker 33 fixedly connected to one side of the piston 32; an opening and closing valve 4 is installed inside the end cap 2, and the opening and closing valve 4 includes a first valve core 41 and a second valve core 43. A valve core spring 42 is formed between the first valve core 41 and the second valve core 43 to connect them so that the first valve core 41 can move relative to the second valve core 43. The first valve core 41, the second valve core 43 and the inner wall surface of the end cap 2 enclose an opening and closing valve air chamber a, and a through middle hole 411 is machined in the middle of the first valve core 41; when the first valve core 41 seals the end of the piston cylinder 31, the middle hole 411 communicates with the outside through an end cap hole 21 on the end cap 2. When the first valve core 41 is separated from the end of the piston cylinder 31, the middle hole 411 is blocked by a rubber pad 5 disposed in the middle of the end cap 2; a partition member 6 is installed inside the gun housing 1, and the partition member 6 partitions the space between the gun housing 1 and the piston cylinder 31 to form a main air chamber b and a storage air chamber c. The piston cylinder 31 has a one-way air hole 311 flowing unidirectionally into the storage air chamber c, and the partition member 6 has a return air hole 61 flowing back from the storage air chamber c to the piston cylinder 31; a first air path d is formed on the gun housing 1 and communicates with the main air chamber b, and a second air path e is formed on the gun housing 1 and the end cap 2 and communicates with the opening and closing valve air chamber a; an air compressor assembly 7 is configured on the pneumatic nail gun, and the air compressor assembly 7 is used to supplement high-pressure gas into the main air chamber b; a solenoid valve 8 is configured on the pneumatic nail gun, and the solenoid valve 8 has an air inlet end, an air outlet end and an exhaust end. The air inlet end is connected to the first air path d, the air outlet end is connected to the second air path e, and the exhaust end communicates with the outside; a trigger switch 9 is configured on the pneumatic nail gun, and the trigger switch 9 is used to control the on-off of the solenoid valve 8; a power supply module 10 is configured on the pneumatic nail gun, and the power supply module 10 is used to supply power for the operation of the air compressor assembly 7 and the solenoid valve 8; the partition member 6 is a sleeve, and the sleeve is concentrically sleeved outside the piston cylinder 31, so that the inner cavity of the piston cylinder 31, the storage air chamber c and the main air chamber b form a three-layer distribution structure from the inside to the outside along the same axis. The partition member 6 can also be designed in other shapes. For example, the partition member 6 partitions the space between the gun housing 1 and the piston cylinder 31 into two parts on the left and right, and the main air chamber b is disposed on the right side of the storage air chamber c; the air compressor assembly 7 includes an air compressor motor 71, an air compressor storage cylinder 72, and a first pressure switch 73 for controlling the start and stop of the operation of the air compressor motor 71. The air compressor storage cylinder 72 communicates with the main air chamber b. The first pressure switch 73 is used to monitor the pressure value of the main air chamber b and keep the gas pressure in the main air chamber b within a set range. When the gas pressure is higher than the upper limit value of the set range, the air compressor motor 71 stops working. When the gas pressure is lower than the lower limit value of the set range, the air compressor motor 71 starts working;An air release valve 74 is configured on the air compressor storage cylinder 72. When not in use, the gas in the air compressor storage cylinder 72 is released through the air release valve 74 to ensure safety. The nail gun further includes a second pressure switch 11, which is configured on one side of the gun housing 1 for pressure detection of the main air chamber b. The second pressure switch 11 is a normally open switch. When the pressure in the main air chamber b reaches the set value, the second pressure switch 11 closes the circuit so that the nail gun can perform the nail driving action, ensuring the nail driving force, that is, only when the pressure value in the main air chamber a meets the standard, the nail driving action can be achieved. The nail gun further includes a safety bracket 12, a safety bracket return spring 13 and a safety bracket trigger switch 14. The safety bracket 12, the safety bracket return spring 13 and the safety bracket trigger switch 14 are all configured on one side of the gun housing 1. The safety bracket trigger switch 14 is a normally open switch. When the safety bracket 12 is pressed in place, the safety bracket trigger switch 14 closes the circuit to ensure nail driving safety. The nail gun further includes a main switch 15, and the power supply module 10 is a detachable lithium battery pack. In terms of circuit wiring control, the trigger switch 9, the second pressure switch 11, the safety bracket trigger switch 14, the main switch 15, and the solenoid valve 8 are connected in series and then electrically connected to the positive and negative poles of the power supply module 10. The first pressure switch 73, the main switch 15, and the air compressor motor 71 are connected in series and then electrically connected to the positive and negative poles of the power supply module 10.;

[0036] Combined with Figure 5 And Figure 9 , which shows the air path connection between the air compressor storage cylinder 72 and the main air chamber b, Figure 5 In, the rotation of the air compressor motor 71 drives the movement of the air compressor piston rod through the crank connecting rod, so that air enters the air compressor storage cylinder 72 through the one-way valve for storage. As Figure 9 shown, the air compressor storage cylinder 72 is connected to the main air chamber b through a connecting air path. Among them, the second pressure switch 11 is configured on the connecting air path between the air compressor storage cylinder 72 and the main air chamber b.

[0037] Embodiment 2: The difference from Embodiment 1 is that the power supply module 10 is a power-connected type, that is, the power supply module 10 is electrically connected to the mobile power supply through electrical wiring. In this way, the mobile power supply can also be carried with you, reducing the overall weight of the nail gun and making it more labor-saving to hold and use.

[0038] A small air compressor assembly is directly configured on the gun housing, and at the same time, a power supply module is configured to provide electrical energy for the small air compressor assembly, which is convenient for the carrying and outdoor use of the nail gun and overcomes the limitations in use.

[0039] During specific use, for the convenience of understanding the present invention, it is described in conjunction with the accompanying drawings;

[0040] The nail driving cycle process of this nail gun is as follows:

[0041] When the circuit is not connected, the solenoid valve 8 is in the first position, and the intake end and the outlet end of the solenoid valve 8 are connected, that is, the first air passage d and the second air passage e are connected. Correspondingly, the high-pressure gas in the main air chamber b passes through the first air passage d and the second air passage e to the opening and closing valve air chamber a. The opening and closing valve air chamber a is in a high-pressure state. The valve core spring 42 causes the first valve core 41 to block the end of the piston cylinder 31. The piston 32 of the piston striker assembly 3 remains in close contact with the first valve core 41 (this is the standby state, see Figure 4 ); when the trigger switch 9 is pulled, the circuit is connected, the solenoid valve 8 is in the second position, the outlet end of the solenoid valve 8 is connected to the outside, and the opening and closing valve air chamber a is depressurized to the normal pressure state. The high-pressure gas in the main air chamber b forces the first valve core 41 to move against the elastic force of the valve core spring 42. After moving, the middle hole 411 is blocked by the rubber pad 5. The high-pressure gas acts on the piston 32, and the striker 33 moves synchronously with the piston 32, that is, the nail driving action is realized (this is the firing state, see Figure 3 ); after the nail driving is completed, the high-pressure gas passes through the one-way air hole 311 to the air storage chamber c for storage; when the trigger switch 9 is released, the solenoid valve 8 returns to the first position, that is, the opening and closing valve air chamber a returns to the high-pressure state. The valve core spring 42 causes the first valve core 41 to block the end of the piston cylinder 31 again. At this time, one side of the piston 32 is connected to the air storage chamber c through the air return port 61 and is in a high-pressure state; the other side of the piston 32 is communicated with the outside through the middle hole 411 and the end cover hole 21 and is in a normal pressure state; the high-pressure gas in the air storage chamber c causes the piston 32 to reset, completing the nail driving cycle.

[0042] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pneumatic nail gun with a built-in air compressor, comprising: A gun housing (1) and an end cap (2), the end cap (2) being sealingly connected to the right side of the gun housing (1); A piston striker assembly (3), the piston striker assembly (3) including a piston cylinder (31) fixedly installed in the gun housing (1), a piston (32) slidably disposed in the piston cylinder (31), and a striker (33) fixedly connected to one side of the piston (32); An opening and closing valve (4), the opening and closing valve (4) being installed in the end cap (2), the opening and closing valve (4) including a first valve core (41) and a second valve core (43), a valve core spring (42) connecting between the first valve core (41) and the second valve core (43) such that the first valve core (41) can move relative to the second valve core (43), the first valve core (41), the second valve core (43) and the inner wall surface of the end cap (2) enclosing an opening and closing valve air chamber (a), a through hole (411) being machined in the middle of the first valve core (41); when the first valve core (41) seals the end of the piston cylinder (31), the through hole (411) communicates with the outside through an end cap hole (21) on the end cap (2), and when the first valve core (41) separates from the end of the piston cylinder (31), the through hole (411) is blocked by a rubber pad (5) disposed in the middle of the end cap (2); A partition member (6), the partition member (6) being installed in the gun housing (1), the partition member (6) partitioning the space between the gun housing (1) and the piston cylinder (31) to form a main air chamber (b) and a gas storage chamber (c), the piston cylinder (31) having a one-way air hole (311) flowing unidirectionally towards the gas storage chamber (c), and the partition member (6) having a return air hole (61) flowing back from the gas storage chamber (c) to the piston cylinder (31); A first air path (d) and a second air path (e), the first air path (d) being formed on the gun housing (1) and communicating with the main air chamber (b), and the second air path (e) being formed on the gun housing (1) and the end cap (2) and communicating with the opening and closing valve air chamber (a); It is characterized in that it further includes: An air compressor assembly (7), the air compressor assembly (7) being configured on the pneumatic nail gun, the air compressor assembly (7) being used to supplement high-pressure gas into the main air chamber (b); A solenoid valve (8), the solenoid valve (8) being configured on the pneumatic nail gun, the solenoid valve (8) having an air inlet end, an air outlet end, and an exhaust end, the air inlet end being connected to the first air path (d), the air outlet end being connected to the second air path (e), and the exhaust end being in communication with the outside; A trigger switch (9), the trigger switch (9) being configured on the pneumatic nail gun, the trigger switch (9) being used to control the on and off of the solenoid valve (8); A power supply module (10), the power supply module (10) being configured on the pneumatic nail gun, the power supply module (10) being used to supply power for the operation of the air compressor assembly (7) and the solenoid valve (8).

2. The pneumatic nail gun with an air compressor built therein according to claim 1, characterized in that: The partition member (6) is a sleeve, which is concentrically sleeved outside the piston cylinder (31), so that the inner cavity of the piston cylinder (31), the air storage chamber (c), and the main air chamber (b) form a three-layer distribution structure from the inside to the outside along the same axis.

3. The pneumatic nail gun with an air compressor built therein according to claim 1, characterized in that: The air compressor assembly (7) includes an air compressor motor (71), an air compressor air storage cylinder (72), and a first pressure switch (73) for controlling the start and stop of the operation of the air compressor motor (71). The air compressor air storage cylinder (72) is in communication with the main air chamber (b). The first pressure switch (73) is used to monitor the pressure value of the main air chamber (b) and keep the gas pressure in the main air chamber (b) within a set range. When the gas pressure is higher than the upper limit value of this set range, the air compressor motor (71) stops working. When the gas pressure is lower than the lower limit value of this set range, the air compressor motor (71) starts working.

4. The pneumatic nail gun with an air compressor built therein according to claim 3, characterized in that: The air compressor air storage cylinder (72) is provided with a bleed valve (74).

5. The pneumatic nail gun with an air compressor built therein according to claim 3, wherein: It further includes a second pressure switch (11). The second pressure switch (11) is arranged on one side of the gun housing (1) for detecting the pressure of the main air chamber (b). The second pressure switch (11) is a normally open switch. When the pressure of the main air chamber (b) reaches the set value, the second pressure switch (11) closes the circuit so that the nail gun can perform a nailing action.

6. The pneumatic nail gun with an air compressor built therein according to claim 5, wherein: It further includes a safety bracket (12), a safety bracket return spring (13), and a safety bracket trigger switch (14). The safety bracket (12), the safety bracket return spring (13), and the safety bracket trigger switch (14) are all arranged on one side of the gun housing (1). The safety bracket trigger switch (14) is a normally open switch. When the safety bracket (12) is pressed in place, the safety bracket trigger switch (14) closes the circuit to ensure the safety of nailing.

7. The pneumatic nail gun with an air compressor built therein according to claim 6, characterized in that: It further includes a main switch (15), and the power supply module (10) is a detachable lithium battery pack.

8. The pneumatic nail gun with an air compressor built therein according to claim 7, wherein: In terms of circuit wiring control, the trigger switch (9), the second pressure switch (11), the safety bracket trigger switch (14), the main switch (15), and the solenoid valve (8) are connected in series and then electrically connected to the positive and negative electrodes of the power supply module (10). The first pressure switch (73), the main switch (15), and the air compressor motor (71) are connected in series and then electrically connected to the positive and negative electrodes of the power supply module (10).

9. A pneumatic nail gun with an air compressor built therein, characterized in that: The power supply module (10) is powered by electricity.

Images