Spray gun capable of automatically switching spraying

Abstract

The utility model discloses an automatic spraying switching spray gun, which comprises a gun body, a grip, a nozzle and a trigger, a needle plug and an air passage are arranged in the gun body, a grip air passage is formed in the grip, the grip air passage is communicated with the air passage of the gun body, an air passage switch is arranged on the grip, the trigger pushes the air passage switch, and the nozzle is connected with the air passage of the gun body. An air cylinder and a piston installed in the air cylinder are arranged at the rear end of the gun body, the needle plug is connected with the piston, a plunger is formed at the front end of the piston, the plunger is inserted into the air channel and can seal the air channel, a branch air channel is further arranged in the gun body, one end of the branch air channel is communicated with the air channel switch, and the other end of the branch air channel is communicated with the needle plug. And the other end of the branch air passage is communicated with the air cylinder. The on-off of the needle plug is controlled by the piston, the control can be realized through high-pressure gas, and when the high-pressure gas is continuously introduced, the needle plug is always in an open state, so that the automatic spraying switching is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a spray gun, especially an automatic spraying switching spray gun. BACKGROUND

[0002] The needle plug of the spray gun in the prior art is generally driven by a trigger, and when the trigger controls the air passage at the same time, the trigger is difficult to balance the control amount of both. For example, the utility model patent with the patent number CN201911388346.2 and the publication date of April 24, 2020 discloses a double linkage paint spray gun, which comprises a gun barrel, a nozzle, a gun handle and a trigger. The nozzle is arranged at the front end of the gun barrel, and the front end of the nozzle is provided with a spray opening. The gun barrel is provided with a gas conveying passage and a material conveying passage. The gun handle is provided with an air inlet passage connected with the gas conveying passage. The gun barrel and the gun handle are provided with a material outlet assembly and an air inlet assembly for controlling the opening and closing of the material conveying passage and the air inlet passage. The trigger can control the synchronous opening and closing of the material outlet assembly and the air inlet assembly to correspond to the passages. The above-mentioned scheme is difficult to balance the control amount of the material outlet assembly and the air inlet assembly, and is inconvenient to use. SUMMARY

[0003] The utility model solves the technical problem of the prior art, provides a spray gun which is convenient to use and can automatically complete spraying switching.

[0004] According to the spray gun for automatic spraying switching provided by the utility model, the gun body, the handle connected with the gun body, the nozzle arranged at the front end of the gun body and the trigger hinged on the gun body are provided. The needle plug and the air passage are arranged in the gun body. The handle gas passage is formed in the handle. The handle gas passage is communicated with the air passage of the gun body. The air path switch is arranged on the handle. The trigger pushes the air path switch. The air cylinder and the piston installed in the air cylinder are arranged at the rear end of the gun body. The needle plug is connected with the piston. The front end of the piston is formed with the plunger. The plunger is inserted into the air passage and can close the air passage. The branch air passage is further arranged in the gun body. One end of the branch air passage is communicated with the air path switch. The other end of the branch air passage is communicated with the air cylinder.

[0005] According to the spray gun for automatic spraying switching provided by the utility model, the gun body, the handle connected with the gun body, the nozzle arranged at the front end of the gun body and the trigger hinged on the gun body are provided. The needle plug and the air passage are arranged in the gun body. The handle gas passage is formed in the handle. The handle gas passage is communicated with the air passage of the gun body. The air path switch is arranged on the handle. The trigger pushes the air path switch. The air cylinder and the piston installed in the air cylinder are arranged at the rear end of the gun body. The needle plug is connected with the piston. The front end of the piston is formed with the plunger. The plunger is inserted into the air passage and can close the air passage. The branch air passage is further arranged in the gun body. One end of the branch air passage is communicated with the air path switch. The other end of the branch air passage is communicated with the air cylinder.

[0006] Further, the rear end of the air cylinder is provided with an adjusting member for adjusting the flow rate, and the adjusting member abuts against the needle plug.

[0007] Further, the front end of the air cylinder is provided with a mounting seat, and the plunger penetrates through the mounting seat.

[0008] Further comprising, the gun body is respectively provided with a main gas flow adjusting knob and an atomization gas flow adjusting knob, the main gas flow adjusting knob communicates with the main gas flow channel in the gas channel, and the atomization gas flow adjusting knob communicates with the atomization gas flow channel in the gas channel.

[0009] Further comprising, the main gas flow adjusting knob and the atomization gas flow adjusting knob are vertically arranged on two sides of the gun body.

[0010] Further comprising, the gas path switch comprises a seat body with an inner cavity, a top rod inserted into the seat body and a sealing plug pushed by the top rod, the seat body is formed with a gas passage hole communicating with the handle gas channel, an end of the seat body is formed with a gas outlet, the gas passage hole communicates with the gas outlet, the gas outlet communicates with the branch gas channel, and the sealing plug is installed at the gas outlet.

[0011] Further comprising, the sealing plug is abutted by a return spring.

[0012] Further comprising, one end of the trigger is hinged to the gun body, and the middle part of the trigger is in contact with the top rod.

[0013] Compared with the prior art, the automatic spraying switching spray gun provided by the utility model has the following advantages: firstly, the needle plug in the utility model is controlled by a piston to realize on-off, and the needle plug is always in an open state when high-pressure gas is continuously supplied, so that automatic spraying switching is realized. Secondly, the gas channel on-off in the utility model is also controlled by a piston, and the gas channel is continuously opened by high-pressure gas, so that the utility model can realize automatic spraying by controlling air intake when the trigger is in a fixed state. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a front view of the utility model.

[0015] Figure 2 It is a right view of the utility model.

[0016] Figure 3 It is a sectional view of the utility model.

[0017] Figure 4 It is Figure 3 It is an enlarged view of A in the middle. DETAILED DESCRIPTION

[0018] In order to clearly illustrate the scheme in the utility model, the preferred embodiments are given below and are described in detail in combination with the drawings. The following description is essentially only exemplary and is not intended to limit the application or use of the present disclosure. It should be understood that in all the drawings, corresponding reference numerals represent the same or corresponding parts and features.

[0019] As Figures 1 to 4 The utility model provides a kind of automatic spraying switching's spray gun, including gun body 1, the handle 2 being connected with the gun body 1, the nozzle 3 being arranged at the front end of the gun body 1 and the trigger 4 being hinged on the gun body 1, needle plug 11 and air passage 12 are provided in the gun body 1, handle air passage 21 is shaped in the handle 2, the handle air passage 21 with the air passage 12 of the gun body 1 is communicated, air path switch 5 is provided on the handle 2, the trigger 4 pushes air path switch 5, the rear end of the gun body 1 is provided with air cylinder 13 and piston 14 being installed in the air cylinder 13, the needle plug 11 is connected with the piston 14, the front end of the piston 14 is shaped with plunger 15, the plunger 15 is inserted into the air passage 12 and can close the air passage 12, a branch air passage 16 is also provided in the gun body 1, one end of the branch air passage 16 is communicated with the air path switch 5, another end of the branch air passage 16 is communicated with the air cylinder 13.The high-pressure gas in the handle air passage 21 enters the branch air passage 16 after the trigger 4 pushes air path switch 5 to open, high-pressure gas enters the air cylinder 13 through the branch air passage 16, and the piston 14 is pushed to move backward, therefore, the plunger 15 opens the air passage 12, and the high-pressure gas in the air passage 12 enters the main airflow passage and atomization airflow passage of gun body 1.The high-pressure gas continues to push the piston 14 to move backward, and then the needle plug 11 is pushed to move backward, so as to open nozzle.When the trigger is in fixed state, high-pressure gas continuously enters the air cylinder 13, and automatic spraying is carried out by controlling air inlet.The trigger of the utility model does not drive needle plug to move, and it is convenient to use.

[0020] Referring to Figures 1 to 4 In the above embodiment of the utility model, further comprising, the rear end of the air cylinder 13 is provided with an adjusting member 17 for adjusting flow, and the adjusting member 17 abuts against the needle plug 11.The needle plug 11 passes through the piston 14, and the opening amplitude of the needle plug 11 is controlled by adjusting the adjusting member 17, so as to realize flow control.

[0021] Referring to Figures 1 to 4 In the above embodiment of the utility model, further comprising, the front end of the air cylinder 13 is installed with a mounting seat 18, and the plunger 15 passes through the mounting seat 18.The mounting seat 18 plays the role of supporting installation, and it can also be used as a part of air passage structure for controlling the on-off component of the air passage.The end of the plunger 15 can abut against in the air passage, so as to close the air passage, and realize the on-off control of the air passage.

[0022] Referring to Figures 1 to 4Further comprising, the gun body 1 is respectively provided with main airflow adjusting knob 6 and atomization airflow adjusting knob 7, the main airflow adjusting knob 6 is communicated with the main airflow passage in the airway, the atomization airflow adjusting knob 7 is communicated with the atomization airflow passage in the airway, the utility model discloses can realize the control of main airflow passage and atomization airflow passage respectively, make control more accurate, effect is better.

[0023] Referring to Figures 1 to 4 Further comprising, the main airflow adjusting knob 6 and the atomization airflow adjusting knob 7 are vertically arranged at the two sides of the gun body 1, and the two are integrally Y-shaped and located at the upper portion of the gun body 1.

[0024] Referring to Figures 1 to 4 Further comprising, the air path switch 5 includes a seat body 51 with an inner cavity, a top rod 52 inserted into the seat body 51 and a sealing plug 53 pushed by the top rod 52, the seat body 51 is formed with an air hole 54 communicated with the handle air passage 21, the end of the seat body 51 is formed with an air outlet 55, the air hole 54 is communicated with the air outlet 55, the air outlet 55 is communicated with the branch air passage 16, and the sealing plug 53 is installed at the air outlet 55, the trigger 4 presses the top rod 52, thereby driving the top rod 52, the top rod 52 controls the sealing plug 53 to open or close the air outlet 55, and the on-off control of the branch air passage 16 is realized, and the control mode is better in effect and convenient to operate.

[0025] Referring to Figures 1 to 4 Further comprising, the sealing plug 53 is abutted by a return spring 56, the return spring 56 pushes the sealing plug 53 to close the air outlet 55, and automatic closing of the air outlet 55 is realized.

[0026] Referring to Figures 1 to 4 Further comprising, one end of the trigger 4 is hinged to the gun body 1, and the middle part of the trigger 4 is in contact with the top rod 52, and the trigger 4 can be pulled to press the top rod 52, so that the operation is convenient, time and labor are saved.

[0027] To sum up, the above-mentioned content is only an embodiment of the utility model, is only used for explaining the principle of the utility model, and is not used for limiting the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An automatic spray gun for switching between coatings, comprising a gun body, a handle connected to the gun body, a nozzle disposed at the front end of the gun body, and a trigger hinged to the gun body, wherein the gun body has a needle plug and an air passage, the handle has a grip air passage formed therein, the grip air passage communicating with the air passage of the gun body, and an air circuit switch is disposed on the handle, the trigger actuating the air circuit switch, characterized in that: The gun body has a cylinder and a piston installed in the cylinder at the rear end. The needle plug is connected to the piston. The piston has a plunger formed at the front end. The plunger is inserted into the air passage and can seal the air passage. The gun body also has a branch air passage. One end of the branch air passage is connected to the air circuit switch, and the other end of the branch air passage is connected to the cylinder.

2. The spray gun with automatic spraying switching as described in claim 1, characterized in that: The cylinder has a regulating component at its rear end for adjusting the flow rate, and the regulating component rests against the needle plug.

3. The spray gun with automatic spraying switching as described in claim 1, characterized in that: A mounting seat is installed at the front end of the cylinder, and the plunger passes through the mounting seat.

4. The spray gun with automatic spraying switching as described in claim 1, characterized in that: The gun body is equipped with a main airflow adjustment knob and an atomizing airflow adjustment knob. The main airflow adjustment knob is connected to the main airflow channel in the air passage, and the atomizing airflow adjustment knob is connected to the atomizing airflow channel in the air passage.

5. The spray gun with automatic spraying switching as described in claim 4, characterized in that: The main airflow adjustment knob and the atomizing airflow adjustment knob are vertically arranged on both sides of the gun body.

6. The spray gun with automatic spraying switching as described in claim 1, characterized in that: The air circuit switch includes a base with an inner cavity, a push rod inserted into the base, and a sealing plug pushed by the push rod. The base has a vent hole that communicates with the grip air passage. The end of the base has an air outlet. The vent hole communicates with the air outlet. The air outlet communicates with the branch air passage. The sealing plug is installed at the air outlet.

7. The spray gun with automatic spraying switching as described in claim 6, characterized in that: The sealing plug is supported by a return spring.

8. The spray gun with automatic spraying switching as described in claim 6, characterized in that: One end of the trigger is hinged to the gun body, and the middle part of the trigger is in contact with the push rod.

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