Switchable automatic continuous nailing gun

Abstract

The switchable automatic continuous nailing gun comprises a nailing gun body, an air cylinder body is arranged in the nailing gun body, and an upper air chamber, a middle air chamber and a lower air chamber are further sequentially arranged in the nailing gun body; a balance valve assembly is arranged in the upper air chamber, and a piston assembly is arranged in the air cylinder body. A pneumatic control valve assembly is arranged on the outer side of the nail gun body, a flow adjusting assembly is arranged on the side face of the pneumatic control valve assembly, and a change-over switch assembly is arranged on the side face of the flow adjusting assembly. A first gas circuit communicated with the pneumatic control valve assembly and the lower gas chamber is arranged in the nail gun main body, and a second gas circuit and a third gas circuit are further arranged in the nail gun main body; the pneumatic control valve assembly comprises a single-click switching rod and a first reset spring, and when the single-click switching rod moves in a reciprocating mode, on-off of the second gas circuit and on-off of the third gas circuit are mutually switched. Air paths are switched through the pneumatic control valve assembly, so that the function of continuous nailing is achieved; the flow can be adjusted through the flow adjusting assembly, and the nailing frequency can be adjusted; through the change-over switch assembly, free switching between a single-shot mode and a continuous-shot mode is achieved.

Description

Technical Field

[0001] The invention belongs to the field of nailing guns, and in particular relates to a switchable automatic continuous nailing gun. Background Art

[0002] The pneumatic nail gun is a commonly used nailing tool, which is more commonly used in daily life. At present, the pneumatic nail guns on the market have many functions and are widely applicable. The existing patent text with the publication number CN113547485A discloses a pneumatic nail gun, including a gun body, a gun cover, a valve structure and a trigger assembly. The gun body is provided with a main air source channel, a valve membrane assembly, a valve membrane cavity, a cylinder, a piston and a gun needle. A first air storage cavity is provided between the cylinder and the gun body. The valve structure includes an inner valve seat, an inner valve core, a switch valve core and a valve core spring. A valve channel is provided in the gun body, the inner valve seat is fixed at the front end of the valve channel, the inner valve core is movably arranged at the rear end of the valve channel, and a second air storage cavity is formed between the inner valve seat and the two ends of the inner valve core. The rear end of the switch valve core passes through the inner valve seat body and is inserted into the inner valve core body. The front end of the switch valve core is located outside the inner valve seat and cooperates with the trigger assembly. One end of the valve core spring is connected to the switch valve core, and the other end of the valve core spring is connected to the inner valve core. Existing pneumatic nail guns mainly use the trigger assembly to switch the air circuit, thereby realizing the automatic continuous nailing working mode. The air circuit in the trigger assembly is narrow and has high sealing requirements. At the same time, during the nailing process, impurities are easily sucked into the air circuit of the trigger assembly, and the automatic nailing function is easily ineffective. Therefore, it is necessary to design a switchable automatic continuous nail gun to overcome the above difficulties. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention designs a switchable automatic continuous nailing gun. The present invention switches the air circuit through an air-controlled valve assembly, so that the balance valve assembly automatically reciprocates and extends, thereby realizing the function of continuous nailing; the flow rate can be adjusted through the flow regulating assembly, which is convenient for adjusting the nailing frequency; and the switching switch assembly can be used to facilitate free switching between single-shot and continuous nailing modes.

[0004] The inventive objective of the present invention is achieved through the following technical solutions: a switchable automatic continuous nail gun, comprising a nail gun body, a cylinder body is arranged in the nail gun body, an upper air chamber, a middle air chamber and a lower air chamber are arranged in sequence in the nail gun body along the axial direction of the cylinder body; a balance valve assembly is arranged in the upper air chamber, and a piston assembly is arranged in the cylinder body; an air-controlled valve assembly adjacent to the upper air chamber is arranged on the outer side of the nail gun body, a flow regulating assembly is arranged on the side of the air-controlled valve assembly, and a switching switch assembly is arranged on the side of the flow regulating assembly; a first air circuit connecting the air-controlled valve assembly and the lower air chamber is arranged in the nail gun body, and a second air circuit and a third air circuit are also arranged in the nail gun body; the air-controlled valve assembly comprises a single-click switching rod and a first return spring, and the on-off of the second air circuit and the third air circuit are switched mutually when the single-click switching rod moves back and forth.

[0005] Preferably, a control switch assembly is provided at the handle of the nail gun body, and the control switch assembly includes a trigger, a switch body and an excitation rod, and when the trigger is pulled, the excitation rod is extended and retracted relative to the switch body; the air-controlled valve assembly also includes an air-controlled valve body, and the balancing valve assembly includes a balancing valve body and a second return spring; a first channel is provided in the air-controlled valve body, and the first channel is connected to the second air circuit; a common through hole is provided between the upper air chamber and the nail gun body, and the common through hole is connected to the second air circuit through the air-controlled valve assembly, one end of the second air circuit is connected to the first channel, and the other end of the second air circuit is connected to the control switch assembly.

[0006] Preferably, a balancing valve assembly capable of axially reciprocating movement relative to the cylinder body is provided in the upper air chamber; the balancing valve body is slidably installed in the upper air chamber, and the balancing valve body is arranged close to the opening end of the cylinder body; one end of the second return spring abuts against the balancing valve body, and the other end of the second return spring abuts against the inner wall of the upper air chamber; a wiring terminal is provided at the end of the handle provided in the nail gun body, and the wiring terminal is connected to the middle air chamber; an inclined channel is provided at the end of the second air circuit which is connected to the switch body.

[0007] Preferably, a second channel is provided in the air-controlled valve body, and the second channel is interconnected with the common through hole; a third air circuit is provided between the nail gun body and the middle air chamber, and a third channel is provided in the air-controlled valve body, and the third air circuit is connected to the third channel; one end of the third air circuit is connected to the third channel, and the other end of the third air circuit is connected to the middle air chamber.

[0008] Preferably, the air-controlled valve body is respectively provided with a first channel, a second channel and a third channel, the first channel is connected to the second air circuit; the second channel is connected to the upper air chamber, and the third channel is connected to the third air circuit; the air-controlled valve body is also provided with a single-click switching rod that can move axially relative to the single-click switching rod, a first return spring is provided between the single-click switching rod and the inner wall of the air-controlled valve body, and a plurality of sealing rings are mounted on the single-click switching rod; in the default state, the single-click switching rod is arranged close to the flow regulating component.

[0009] In the default state, the single-click switch rod is set close to the flow regulating component under the action of the first return spring. At this time, the first channel is connected to the second air path, and the third channel is separated by the sealing ring on the single-click switch rod, so that the third air path is in a closed state and the second air path is in an open state. In the default state, the trigger rod is not pressed by the trigger, and the inclined channel is not blocked. The second air path is connected to the middle air chamber through the hole on the switch body, so the middle air chamber and the upper air chamber are in a conducting state. When the wiring terminal of the nail gun body is connected to the air source, high pressure will be formed in the middle air chamber; because the second air path is in an open state at this time, the high-pressure gas in the middle air chamber enters the upper air chamber along the second air path; the upper air chamber is in a high-pressure state, so the high-pressure gas will push the balance valve body against the open end of the cylinder body, and the firing pin on the piston assembly is in a state of waiting to be fired; at this time, the cylinder body is in a normal pressure state.

[0010] When the operator pulls the trigger and does not release it, the trigger rod shrinks relative to the switch body; at this time, the trigger rod will block the air path between the middle air chamber and the upper air chamber, and at the same time open the passage between the upper air chamber and the outside world. Here, the upper air chamber is connected to the switch body through the second air path, and the gas in the second air path is connected to the outside world through the hole of the switch body. The high-pressure gas in the upper air chamber is released to a normal pressure state through the second air path. Since the balance valve body loses the effect of pressure, the balance valve body will move left away from the cylinder body under the action of the second return spring; at this time, the cylinder body is connected to the high-pressure gas in the middle air chamber, so that the piston assembly extends and is in the nail removal mode.

[0011] Preferably, the air-controlled valve assembly includes an air-controlled valve body, and a flow regulating assembly is provided on the side of the air-controlled valve body; the flow regulating assembly includes a flow valve body and an adjusting knob, and the adjusting knob is threadedly connected to the flow valve body; a single-click switching rod that can be axially extended and retracted relative to the air-controlled valve body is provided in the air-controlled valve body, and a plug is fixedly installed at the end of the single-click switching rod, and the plug is arranged between the air-controlled valve body and the flow valve body; the flow valve body is connected to the first air path, and when the adjusting knob is turned, the adjusting knob moves axially relative to the opening end of the first air path; a switching switch assembly is provided on the side of the flow valve body.

[0012] Preferably, one end of the first air circuit is connected to the flow valve body, and the other end of the first air circuit is connected to the lower air chamber; a cylinder body is arranged in the lower air chamber and the middle air chamber, and a sealing component is arranged between the lower air chamber and the middle air chamber to separate the two; a plurality of air vents arranged toward the lower air chamber are arranged in the cylinder body; a limit member is fixedly installed on the outer side of the air control valve body, and the limit member is arranged close to the end of the adjusting knob.

[0013] Preferably, the switching switch assembly includes a switch seat, an adjusting handle, a single-connected switching valve and a third return spring; the switch seat is fixedly connected to the flow valve body, a single-connected switching valve that can be extended and retracted relative to the switch seat is provided in the switch seat, and a third return spring is provided between the single-connected switching valve and the flow valve body; the air circuit of the switching switch assembly is arranged between the flow adjustment assembly and the air control valve assembly, and the switching switch assembly is in a closed state by default.

[0014] Preferably, the adjusting handle includes an eccentric portion, which is arranged toward the single-connected switching valve; when the adjusting handle is rotated, the single-connected switching valve moves relative to the switch seat; when the single-connected switching valve moves close to the adjusting knob, the air-controlled valve assembly and the flow regulating assembly are interconnected.

[0015] Preferably, a fourth channel is provided in the flow valve body, and the fourth channel is used to connect the switching switch assembly and the air control valve assembly; a fifth channel is also provided in the flow valve body, and the fifth channel connects the switching switch assembly and the first air path.

[0016] When the piston assembly moves to the right side of the air vent, the lower air chamber begins to inflate to form high pressure; because continuous nailing is required, the switch assembly has been opened in advance, and the single-connection switch valve is set close to the adjustment knob; the fifth channel is connected to the first air circuit, and the first air circuit is connected to the air control valve assembly through the fourth channel; the high pressure of the lower air chamber pressurizes the air control valve body through the first air circuit, and the high pressure pushes the single-click switch rod away from the flow adjustment assembly. At this time, the sealing ring of the single-click switch rod blocks the first channel and the third channel is opened, the second air circuit is in a closed state, and the third air circuit will be opened. Since the third air circuit is opened, the middle air chamber is connected to the upper air chamber through the third air circuit, and the upper air chamber is in an inflated state; the high pressure in the upper air chamber will push the balance valve body to the right and against the open end of the cylinder body; at this time, the high pressure in the cylinder body is released through the air hole on the balance valve assembly, and the piston assembly automatically resets. This is the automatic reset structure of the piston assembly in the existing air nail gun, which will not be discussed here. When the piston assembly is reset to the initial state, the lower air chamber returns to the normal pressure state; the lower air chamber is connected to the air control valve body through the first air path, so the air control valve body will also be depressurized, then the single-click switch rod is set close to the flow adjustment component under the action of the first return spring; at this time, the second air path is in the open state, and the third air path is in the closed state; because the trigger is always pressed, the upper air chamber is depressurized through the second air path, the balance valve body quickly moves left away from the cylinder body, and then nailing begins; repeat the above steps to achieve continuous nailing. By turning the adjustment knob, the distance between the adjustment knob and the first air path can be adjusted, so as to facilitate the adjustment of the flow in the air control valve body, so as to control the nailing frequency. Since the adjustment handle is provided with an eccentric part, turning the adjustment handle can push the single-connection switching valve to extend and retract relative to the switch seat, so as to facilitate the control of the on-off state of the switching switch assembly.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention controls the on-off of the second air circuit and the third air circuit through the air-controlled valve assembly, so that the upper air chamber can be cyclically charged and deflated. When the upper air chamber is inflated, the air-controlled valve assembly is controlled to move back and forth, so as to achieve continuous nailing, and the structure is simple and reliable; 2. The air circuit between the upper air chamber and the middle air chamber is connected through the air-controlled valve assembly, and the lower air chamber is connected to the air-controlled valve assembly through the first air circuit, which is convenient for realizing the charging and deflation of the cylinder body; 3. The air intake flow of the first air circuit and the air-controlled valve assembly is adjusted through the flow regulating assembly, so as to adapt and adjust the nailing frequency, and the versatility is good; 4. The on-off of the first air circuit and the air-controlled valve assembly is conveniently controlled through the switching switch assembly, so as to achieve the switching between continuous shooting and single shooting, and the versatility is good; 5. The air-controlled valve assembly is arranged away from the control switch assembly, which can avoid air circuit blockage and is safer and more reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of the present invention; Figure 2 It is the internal structure diagram of the present invention; Figure 3 is the internal structure diagram of the first gas path; Figure 4 The internal structure diagram of the second gas path Figure 5 The internal structure diagram of the third gas path Figure 6 This is the internal structure diagram of the upper air chamber; Figure 7 A three-dimensional diagram of the assembly of the air control valve assembly and the flow control assembly; Figure 8 This is the internal structure diagram of the air control valve body; Fig. 9 The exploded view of the gas control valve assembly; Fig.10 This is the internal structure diagram of the air control valve assembly; Fig.11 It is the internal structure diagram of the flow regulating component; Fig.12 is a diagram of the internal structure of the switching switch assembly; Fig.13 An exploded view of a toggle switch assembly; Markings in the figure: 1. Nail gun body; 2. Cylinder body; 3. Upper air chamber; 4. Middle air chamber; 5. Lower air chamber; 6. Balance valve assembly; 61. Balance valve body; 62. Second return spring; 7. Air control valve assembly; 71. Single-click switch rod; 72. First return spring; 73. Air control valve body; 74. First channel; 75. Second channel; 76. Third channel; 77. Sealing ring; 78. Plug; 8. Flow adjustment assembly; 81. Flow valve body; 82. Adjustment knob; 9. Switch assembly ; 91. switch seat; 92. adjustment handle; 93. single-link switching valve; 94. third return spring; 95. eccentric part; 10. piston assembly; 11. first air path; 12. second air path; 13. third air path; 14. control switch assembly; 141. trigger; 142. switch body; 143. excitation rod; 15. common through hole; 16. wiring terminal; 17. inclined channel; 18. sealing assembly; 19. air vent position; 20. limiter; 21. fourth channel; 22. fifth channel. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings: like Figures 1 to 13 As shown, the present embodiment discloses a switchable automatic continuous nail gun, comprising a nail gun body 1, a cylinder body 2 is arranged in the nail gun body 1, an upper air chamber 3, a middle air chamber 4 and a lower air chamber 5 are arranged in sequence in the nail gun body 1 along the axial direction of the cylinder body 2; a balance valve assembly 6 is arranged in the upper air chamber 3, and a piston assembly 10 is arranged in the cylinder body 2; an air control valve assembly 7 arranged adjacent to the upper air chamber 3 is arranged on the outer side of the nail gun body 1, a flow regulating assembly 8 is arranged on the side of the air control valve assembly 7, and a switching switch assembly 9 is arranged on the side of the flow regulating assembly 8; a first air path 11 connecting the air control valve assembly 7 and the lower air chamber 5 is arranged in the nail gun body 1, and a second air path 12 and a third air path 13 are also arranged in the nail gun body 1; the air control valve assembly 7 comprises a single-click switching rod 71 and a first return spring 72, and when the single-click switching rod 71 moves back and forth, the on-off of the second air path 12 and the third air path 13 are switched mutually.

[0020] A control switch assembly 14 is provided at the handle of the nail gun body 1, and the control switch assembly 14 includes a trigger 141, a switch body 142 and an excitation rod 143. When the trigger 141 is pulled, the excitation rod 143 is retracted relative to the switch body 142; the air-controlled valve assembly 7 also includes an air-controlled valve body 73, and the balancing valve assembly 6 includes a balancing valve body 61 and a second return spring 62; a first channel 74 is provided in the air-controlled valve body 73, and the first channel 74 is connected to the second air circuit 12; a common through hole 15 is provided between the upper air chamber 3 and the nail gun body 1, and the common through hole 15 is connected to the second air circuit 12 through the air-controlled valve assembly 7, one end of the second air circuit 12 is connected to the first channel 74, and the other end of the second air circuit 12 is connected to the control switch assembly 14 assembly. The upper air chamber 3 is provided with a balancing valve assembly 6 capable of axially reciprocating relative to the cylinder body 2; the balancing valve body 61 is slidably mounted in the upper air chamber 3, and the balancing valve body 61 is arranged near the opening end of the cylinder body 2; one end of the second return spring 62 abuts against the balancing valve body 61, and the other end of the second return spring 62 abuts against the inner wall of the upper air chamber 3; the end of the handle provided in the nail gun body 1 is provided with a wiring terminal 16, and the wiring terminal 16 is connected to the middle air chamber 4; the end of the second air path 12 is provided with an inclined channel 17 connected to the switch body 142. The air control valve body 73 is provided with a second channel 75, and the second channel 75 is connected to the common through hole 15; a third air path 13 is provided between the nail gun body 1 and the middle air chamber 4, and a third channel 76 is provided in the air control valve body 73, and the third air path 13 is connected to the third channel 76; one end of the third air path 13 is connected to the third channel 76, and the other end of the third air path 13 is connected to the middle air chamber 4. The air-controlled valve body 73 is respectively provided with a first channel 74, a second channel 75 and a third channel 76, wherein the first channel 74 is connected to the second air circuit 12; the second channel 75 is connected to the upper air chamber 3, and the third channel 76 is connected to the third air circuit 13; the air-controlled valve body 73 is also provided with a single-click switching rod 71 which can move axially relative to the single-click switching rod 71, a first return spring 72 is provided between the single-click switching rod 71 and the inner wall of the air-controlled valve body 73, and a plurality of sealing rings 77 are sleeved and installed on the single-click switching rod 71; in the default state, the single-click switching rod 71 is arranged close to the flow regulating component 8.

[0021] The air control valve assembly 7 includes an air control valve body 73, and a flow regulating assembly 8 is provided on the side of the air control valve body 73; the flow regulating assembly 8 includes a flow valve body 81 and an adjusting knob 82, and the adjusting knob 82 is threadedly connected to the flow valve body 81; a single-click switching rod 71 which can be axially retracted relative to the air control valve body 73 is provided inside the air control valve body 73, and a plug 78 is fixedly installed at the end of the single-click switching rod 71, and the plug 78 is arranged between the air control valve body 73 and the flow valve body 81; the flow valve body 81 is connected to the first air path 11, and when the adjusting knob 82 is turned, the adjusting knob 82 moves axially relative to the opening end of the first air path 11; a switching switch assembly 9 is provided on the side of the flow valve body 81. One end of the first gas circuit 11 is connected to the flow valve body 81, and the other end of the first gas circuit 11 is connected to the lower gas chamber 5; the lower gas chamber 5 and the middle gas chamber 4 are provided with a cylinder body 2, and a sealing component 18 is provided between the lower gas chamber 5 and the middle gas chamber 4 to separate the two; the cylinder body 2 is provided with a plurality of air holes 19 arranged toward the lower gas chamber 5; the outer side of the gas control valve body 73 is fixedly installed with a limiter 20, and the limiter 20 is arranged near the end of the adjustment knob 82. The switching switch assembly 9 includes a switch seat 91, an adjustment handle 92, a single-connected switching valve 93 and a third return spring 94; the switch seat 91 is fixedly connected to the flow valve body 81, and a single-connected switching valve 93 that can be extended and retracted relative to the switch seat 91 is provided in the switch seat 91, and a third return spring 94 is provided between the single-connected switching valve 93 and the flow valve body 81; the gas circuit of the switching switch assembly 9 is arranged between the flow adjustment assembly 8 and the gas control valve assembly 7, and the switching switch assembly 9 is in a closed state by default. The regulating handle 92 includes an eccentric portion 95, and the eccentric portion 95 is arranged toward the single-connection switching valve 93; when the regulating handle 92 is turned, the single-connection switching valve 93 moves relative to the switch seat 91; when the single-connection switching valve 93 moves close to the regulating knob 82, the gas control valve assembly 7 and the flow regulating assembly 8 are connected to each other. A fourth channel 21 is provided in the flow valve body 81, and the fourth channel 21 is used to connect the switching switch assembly 9 and the gas control valve assembly 7; a fifth channel 22 is also provided in the flow valve body 81, and the fifth channel 22 connects the switching switch assembly 9 and the first gas path 11.

[0022] The specific operation process of this embodiment is as follows: in the default state, the single-click switch rod 71 is set close to the flow regulating component 8 under the action of the first return spring 72. At this time, the first channel 74 is connected to the second gas path 12, and the third channel 76 is blocked by the sealing ring 77 on the single-click switch rod 71, so that the third gas path 13 is in a closed state and the second gas path 12 is in an open state. In the default state, the excitation rod 143 is not pressed by the trigger 141, and the inclined channel 17 is not blocked. The second gas path 12 is connected to the middle gas chamber 4 through the hole on the switch body 142, so the middle gas chamber 4 and the upper gas chamber 3 are in a conducting state. When the terminal 16 of the nail gun body 1 is connected to the air source, high pressure will be formed in the middle air chamber 4; since the second air path 12 is in an open state at this time, the high-pressure gas in the middle air chamber 4 enters the upper air chamber 3 along the second air path 12; the upper air chamber 3 is in a high-pressure state, so the high-pressure gas will push the balance valve body 61 against the open end of the cylinder body 2, and the firing pin on the piston assembly 10 is in a ready-to-fire state; at this time, the cylinder body 2 is in a normal pressure state.

[0023] When the operator pulls the trigger 141 and does not release the trigger 141, the trigger rod 143 shrinks relative to the switch body 142; at this time, the trigger rod 143 will block the air path between the middle air chamber 4 and the upper air chamber 3, and at the same time open the passage between the upper air chamber 3 and the outside world. Here, the upper air chamber 3 is connected to the switch body through the second air path 12, and the gas in the second air path 12 is connected to the outside world through the hole of the switch body 142; at the same time, the trigger rod 143 blocks the middle air chamber 4, thereby separating the middle air chamber 4 from the upper air chamber 3. The high-pressure gas in the upper air chamber 3 is released to a normal pressure state through the second air path 12. Since the balancing valve body 61 loses the effect of pressure, the balancing valve body 61 will move left away from the cylinder body 2 under the action of the second return spring 62; at this time, the cylinder body 2 is connected to the high-pressure gas in the middle air chamber 4, so that the piston assembly 10 extends and is in a nail-out mode.

[0024] When the piston assembly 10 moves to the right side of the air vent position 19, the lower air chamber 5 begins to inflate to form high pressure; because continuous nailing is required, the switching switch assembly 9 has been opened in advance, and the single-link switching valve 93 is set close to the adjusting knob 82; the fifth channel 22 is connected to the first air circuit 11, and the first air circuit 11 is connected to the air control valve assembly 7 through the fourth channel 21; the high pressure of the lower air chamber 5 pressurizes the air control valve body 73 through the first air circuit 11, and the high pressure pushes the single-click switching rod 71 away from the flow regulating assembly 8. At this time, the sealing ring 77 of the single-click switching rod 71 blocks the first channel 74 and the third channel 76 is opened; then the second air circuit 12 is in a closed state, and the third air circuit 13 will be opened. Since the third air path 13 is open, the middle air chamber 4 is connected to the upper air chamber 3 through the third air path 13, and the upper air chamber 3 is in an inflated state; the high pressure in the upper air chamber 3 will push the balance valve body 61 to move right and against the open end of the cylinder body 2; at this time, the high pressure in the cylinder body 2 is released through the air hole on the balance valve assembly 6, and the piston assembly 10 automatically resets. This is the automatic reset structure of the piston assembly 10 in the existing air nail gun, which will not be discussed here. When the piston assembly 10 is reset to the initial state, the lower air chamber 5 returns to the normal pressure state; the lower air chamber 5 is connected to the air control valve body 73 through the first air path 11, so the air control valve body 73 will also be depressurized, and then the single-click switch rod 71 is set close to the flow regulating assembly 8 under the action of the first return spring 72; at this time, the second air path 12 is in an open state, and the third air path 13 is in a closed state; because the trigger 141 is always pressed, the upper air chamber 3 is depressurized through the second air path 12, and the balance valve body 61 quickly moves left away from the cylinder body 2, and then nailing begins; the above steps are repeated to achieve continuous nailing. By turning the adjusting knob 82, the distance between the adjusting knob 82 and the first air path 11 can be adjusted, so as to facilitate the adjustment of the flow in the air control valve body 73, so as to control the nailing frequency. Since the adjusting handle 92 is provided with an eccentric portion 95, turning the adjusting handle 92 can push the single-connection switching valve 93 to expand and contract relative to the switch seat 91, so as to facilitate the control of the on-off state of the switching switch assembly 9.

[0025] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A switchable automatic continuous nail gun, comprising a nail gun body (1), wherein a cylinder body (2) is arranged inside the nail gun body (1), characterized in that: An upper air chamber (3), a middle air chamber (4) and a lower air chamber (5) are sequentially arranged in the nail gun body (1) along the axial direction of the cylinder body (2); a balance valve assembly (6) is arranged in the upper air chamber (3), and a piston assembly (10) is arranged in the cylinder body (2); an air control valve assembly (7) is arranged adjacent to the upper air chamber (3) on the outer side of the nail gun body (1); a flow regulating assembly (8) is arranged on the side of the air control valve assembly (7); and a switching switch assembly (9) is arranged on the side of the flow regulating assembly (8); a first air path (11) connecting the air control valve assembly (7) and the lower air chamber (5) is arranged in the nail gun body (1); a second air path (12) and a third air path (13) are also arranged in the nail gun body (1); the air control valve assembly (7) comprises a single-click switching rod (71) and a first return spring (72); when the single-click switching rod (71) moves back and forth, the on-off of the second air path (12) and the third air path (13) are switched mutually.

2. The switchable automatic continuous nailing gun according to claim 1, characterized in that: A control switch assembly (14) is provided at the handle of the nail gun body (1), the control switch assembly (14) comprising a trigger (141), a switch body (142) and an excitation rod (143), and when the trigger (141) is pulled, the excitation rod (143) is retracted relative to the switch body (142); the air control valve assembly (7) further comprises an air control valve body (73), and the balance valve assembly (6) comprises a balance valve body (61) and a second return spring (62); a first channel (74) is provided in the air control valve body (73), and the first channel (74) is communicated with the second air path (12); a common through hole (15) is provided between the upper air chamber (3) and the nail gun body (1), and the common through hole (15) is connected to the second air path (12) through the air control valve assembly (7), one end of the second air path (12) is communicated with the first channel (74), and the other end of the second air path (12) is connected to the control switch assembly (14).

3. The switchable automatic continuous nailing gun according to claim 2, characterized in that: The upper air chamber (3) is provided with a balancing valve assembly (6) capable of axially reciprocating movement relative to the cylinder body (2); the balancing valve body (61) is slidably mounted in the upper air chamber (3), and the balancing valve body (61) is arranged close to the opening end of the cylinder body (2); one end of the second return spring (62) abuts against the balancing valve body (61), and the other end of the second return spring (62) abuts against the inner wall of the upper air chamber (3); the end of the handle provided in the nail gun body (1) is provided with a wiring terminal (16), and the wiring terminal (16) is connected to the middle air chamber (4); the end of the second air path (12) is provided with an inclined channel (17) connected to the switch body (142).

4. The switchable automatic continuous nailing gun according to claim 2, characterized in that: A second channel (75) is provided in the air-controlled valve body (73), and the second channel (75) is communicated with the common through hole (15); a third air path (13) is provided between the nail gun body (1) and the middle air chamber (4); a third channel (76) is provided in the air-controlled valve body (73), and the third air path (13) is connected to the third channel (76); one end of the third air path (13) is connected to the third channel (76), and the other end of the third air path (13) is connected to the middle air chamber (4).

5. The switchable automatic continuous nailing gun according to claim 2, characterized in that: The air control valve body (73) is provided with a first channel (74), a second channel (75) and a third channel (76), respectively; the first channel (74) is connected to the second air circuit (12); the second channel (75) is connected to the upper air chamber (3); and the third channel (76) is connected to the third air circuit (13); the air control valve body (73) is further provided with a single-click switching rod (71) that can move axially relative to the single-click switching rod (71); a first return spring (72) is provided between the single-click switching rod (71) and the inner wall of the air control valve body (73); and a plurality of sealing rings (77) are sleeved and mounted on the single-click switching rod (71); in a default state, the single-click switching rod (71) is arranged close to the flow regulating component (8).

6. The switchable automatic continuous nailing gun according to claim 1, characterized in that: The air control valve assembly (7) comprises an air control valve body (73), and a flow regulating assembly (8) is provided on the side of the air control valve body (73); the flow regulating assembly (8) comprises a flow valve body (81) and an adjusting knob (82), and the adjusting knob (82) is threadedly connected to the flow valve body (81); a single-click switching rod (71) is provided in the air control valve body (73) and can be extended and retracted relative to the axial direction thereof, and a plug (78) is fixedly installed at the end of the single-click switching rod (71), and the plug (78) is arranged between the air control valve body (73) and the flow valve body (81); the flow valve body (81) is connected to the first air path (11), and when the adjusting knob (82) is turned, the adjusting knob (82) moves axially relative to the opening end of the first air path (11); and a switching switch assembly (9) is provided on the side of the flow valve body (81).

7. The switchable automatic continuous nailing gun according to claim 6, characterized in that: One end of the first air path (11) is connected to the flow valve body (81), and the other end of the first air path (11) is connected to the lower air chamber (5); a cylinder body (2) is provided in the lower air chamber (5) and the middle air chamber (4), and a sealing component (18) is provided between the lower air chamber (5) and the middle air chamber (4) to separate the two; a plurality of air vents (19) are provided in the cylinder body (2) and are arranged toward the lower air chamber (5); a limit member (20) is fixedly mounted on the outer side of the air control valve body (73), and the limit member (20) is arranged close to the end of the adjustment knob (82).

8. The switchable automatic continuous nailing gun according to claim 6, characterized in that: The switching switch assembly (9) comprises a switch seat (91), an adjustment handle (92), a single-connected switching valve (93) and a third return spring (94); the switch seat (91) is fixedly connected to a flow valve body (81); a single-connected switching valve (93) is arranged in the switch seat (91) and can be extended and retracted relative to the switch seat; a third return spring (94) is arranged between the single-connected switching valve (93) and the flow valve body (81); an air path of the switching switch assembly (9) is arranged between the flow adjustment assembly (8) and the air control valve assembly (7); and the switching switch assembly (9) is in a closed state in a default state.

9. The switchable automatic continuous nailing gun according to claim 8, characterized in that: The regulating handle (92) comprises an eccentric portion (95), and the eccentric portion (95) is arranged toward the single-connection switching valve (93); when the regulating handle (92) is rotated, the single-connection switching valve (93) moves relative to the switch seat (91); when the single-connection switching valve (93) moves close to the regulating knob (82), the air control valve assembly (7) and the flow regulating assembly (8) are connected to each other.

10. The switchable automatic continuous nailing gun according to claim 6, characterized in that: A fourth channel (21) is provided in the flow valve body (81), and the fourth channel (21) is used to connect the switching assembly (9) and the air control valve assembly (7); a fifth channel (22) is also provided in the flow valve body (81), and the fifth channel (22) connects the switching assembly (9) and the first air path (11).

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