Spray gun structure

Abstract

This utility model provides a paint spray gun structure, mainly solving the problem of uneven paint application caused by the spray cap during use. It includes: a main body with a pigment channel, a gas channel, and a side channel, wherein the pigment channel has a first outlet and the gas channel has a second outlet; a ejector pin assembly with an ejector pin, a nozzle, and a spray cap, wherein several elongated grooves on the spray cap are fixed to several clips on the surface of the main body; a pressure regulating knob assembly connected to one side channel of the main body; and a trigger assembly connected to a shaft on the main body. By integrally forming the spray cap of the ejector pin assembly and using several elongated grooves and clips to fix it to the main body, the spray cap is naturally aligned with the center.

Description

Technical Field

[0001] This utility model relates to a spraying process, and more particularly to a spray gun structure with an automatic alignment effect for the spray cap. Background Technology

[0002] A conventional paint spray gun is equipped with a spray cap, which consists of the spray cap, a sealing ring, and a spray cap nut. This type of assembly provides sealing and disassembly, but its structure is complex, the assembly process is cumbersome, and there are precision errors between the parts, which can easily lead to the misalignment of the central axis between the nozzle and the spray cap.

[0003] However, when the nozzle and the spray cap are not kept coaxial, it will directly affect the atomization effect and uniformity of the paint, resulting in poor atomization or uneven paint surface, which is particularly detrimental to high-precision spraying operations. In addition, the position of the sealing ring is prone to displacement and deformation during assembly, affecting the overall sealing effect and reducing the stability of use. Furthermore, the pressure adjustment structure of the conventional paint gun is prone to subjecting an internal adjusting bolt to excessive pressure, causing deformation and affecting the adjustment effect. Therefore, improvements are necessary. Utility Model Content

[0004] Therefore, in view of the problems existing in the conventional paint spray gun, the main objective of this utility model is to provide a paint spray gun structure that can spray evenly; the secondary objective of this utility model is to provide a durable paint spray gun structure; and another objective of this utility model is to provide a low-cost paint spray gun structure.

[0005] To achieve the above objectives, this utility model provides a paint spray gun structure, characterized in that it comprises:

[0006] A body having a pigment channel, a gas channel and a side channel, wherein the pigment channel has a first outlet, the gas channel has a second outlet, the first outlet is adjacent to the second outlet, and the side channel is connected through the gas channel.

[0007] A ejector assembly includes an ejector pin, a nozzle, and a spray cap. The ejector pin extends through and is connected to the pigment channel. The nozzle is connected to the first outlet of the body. Several long slots on the spray cap are connected to several clips on the surface of the body for fixation. The spray cap is aligned with an axis on the nozzle and covers the second outlet and the nozzle. The spray cap has a hole to allow the nozzle to pass through.

[0008] A pressure regulating knob assembly, wherein the pressure regulating knob assembly is connected to the side channel of the main body; and

[0009] A trigger assembly is connected to a pivot point provided on the main body, and the trigger assembly is connected to the gas passage and side passage of the main body, and the trigger assembly is linked to the pressure regulating knob group and the ejector pin of the ejector pin group.

[0010] The paint gun structure includes: the pressure regulating knob assembly further comprising a knob, a fixing screw, an adjusting bolt, a spring, a piston, and a bushing. The bushing is placed in the side channel of the main body, and the fixing screw is connected to the side channel and abuts against the bushing to form a fixation. The knob is pivotally connected to the fixing screw and is connected to the adjusting bolt. The adjusting bolt is screwed and extends through the fixing screw. The bushing has a first air chamber and a second air chamber. The piston is located in the first air chamber of the bushing. The spring is located between the piston and the fixing screw.

[0011] The paint gun structure includes a pressure regulating knob assembly that further comprises a sealing ring assembly. The sealing ring assembly has a first sealing ring, a second sealing ring, a third sealing ring, and a fourth sealing ring. The first sealing ring is located between the adjusting bolt and the piston. The second and third sealing rings are located between the piston and the bushing. The fourth sealing ring is located between the bushing and the side channel of the body.

[0012] The paint spray gun structure, wherein: the gas channel of the body is provided with a second inlet, and the second inlet is connected to a pneumatic pipeline.

[0013] The paint spray gun structure, wherein: the air pressure pipeline generates a first pressure that enters the gas passage of the body, the first pressure enters the second air chamber through a hole provided in the piston to form a second pressure, when the second pressure is greater than the first pressure, the second pressure pushes the piston to the right, and the hole of the piston is blocked by the adjusting bolt, so that the first pressure can no longer enter the second air chamber to form the second pressure.

[0014] The paint gun structure, wherein: the trigger assembly further includes a trigger and an air intake valve rod, the trigger is connected to the pivot point of the body, the air intake valve rod is connected to the trigger, and the air intake valve rod extends through the side channel of the body.

[0015] The paint gun structure further includes a paint cup, which is connected to a first inlet in the pigment channel of the body.

[0016] The paint spray gun structure, wherein: several latches of the body are respectively arranged relative to each other with the axis of the nozzle as the center.

[0017] The paint spray gun structure, wherein the spray cap of the ejector pin assembly is integrally formed on the ejector pin assembly.

[0018] By employing the aforementioned technical means, this utility model can achieve the following effects:

[0019] 1. This utility model uses a spray cap that is integrally formed and has several long slots of the spray cap naturally engaged and fixed to several buckles of the body, so that the spray cap is naturally aligned with the axis of the nozzle, thereby achieving alignment of the spray cap and the nozzle with the axis and uniformly atomizing and spraying the paint onto the surface of the object.

[0020] 2. In this utility model, by means of the bushing, piston and adjusting bolt of the pressure regulating knob assembly, when the second pressure in the second chamber of the bushing is greater than the first pressure in the first chamber, the second pressure will push the piston, causing the adjusting bolt to block the hole of the piston. At this time, the adjusting bolt only needs to bear the load of the second pressure, thereby achieving the purpose of precise pressure adjustment even after long-term use.

[0021] 3. This utility model achieves the goal of a low-cost paint gun structure by making the spray cap a one-piece molding, which can save processing costs, processing time and assembly time. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the structure of the paint spray gun of this utility model.

[0023] Figure 2 This is an exploded perspective view of the structure of the paint spray gun of this utility model.

[0024] Figure 3 This is a front view of the structure of the paint spray gun of this utility model.

[0025] Figure 4 This is a cross-sectional view of the structure of the paint spray gun of this utility model.

[0026] Figure 5 This is an enlarged view of the pressure regulating knob of this utility model assembled in the side channel.

[0027] Figure 6 This is a schematic diagram of the second pressure driving the piston to move to the right and close the first and second air chambers according to the present invention.

[0028] Figure 7 This is a schematic diagram of the present invention, showing how the second pressure mixes with the pigment and sprays out using the trigger mechanism.

[0029] Figure labeling: A - Spray gun structure; 1 - Body; 11 - Pigment channel; 111 - First outlet; 112 - First inlet; 12 - Gas channel; 121 - Second outlet; 122 - Second inlet; 13 - Clip; 14 - Side channel; 15 - Pivot point; 2 - Ejector pin assembly; 21 - Ejector pin; 22 - Nozzle; 23 - Shaft; 24 - Spray cap; 241 - Long groove; 242 - Hole; 3 - Pressure regulating knob assembly; 31 - Knob; 32 - Fixing 33 - Screw; 34 - Adjusting bolt; 35 - Spring; 35 - Piston; 351 - Hole; 36 - Bushing; 361 - First air chamber; 362 - Second air chamber; 37 - Sealing ring assembly; 371 - First sealing ring; 372 - Second sealing ring; 373 - Third sealing ring; 374 - Fourth sealing ring; 4 - Trigger assembly; 41 - Trigger; 42 - Intake valve rod; 5 - Paint cup; 6 - Air pressure pipeline; P1 - First pressure; P2 - Second pressure; 7 - Pigment. Detailed Implementation

[0030] This utility model provides a paint spray gun structure, mainly providing a paint spray gun structure A that provides uniform spraying, durability and low cost, which includes: a body 1, a ejector pin assembly 2, a pressure adjusting knob assembly 3, a trigger assembly 4 and a paint spray cup 5; the above components are described below with reference to the accompanying drawings.

[0031] For the aforementioned entity 1, please refer to [link / reference]. Figure 1 and Figure 2 As shown, the main body 1 is provided with a pigment channel 11, a gas channel 12 and a side channel 14. The pigment channel 11 is provided with a first outlet 111, and the gas channel 12 is provided with a second outlet 121. The first outlet 111 is adjacent to the second outlet 121, and the side channel 14 is connected through the gas channel 12.

[0032] Please refer to the above-mentioned pin group 2. Figure 1 and Figure 2 As shown, the ejector pin assembly 2 includes an ejector pin 21, a nozzle 22, and a spray cap 24. The ejector pin 21 extends through and is connected to the pigment channel 11, while the nozzle 22 is connected to a first outlet 111 provided on the body 1. The spray cap 24 has several elongated grooves 241 that are fixed to several clips 13 on the surface of the body 1. The clips 13 are respectively arranged opposite each other with the axis 23 of the nozzle 22 as the center, and the spray cap 24 is aligned with the axis 23 of the nozzle 22. The spray cap 24 covers the second outlet 121 and the nozzle 22. The spray cap 24 has a hole 242 for the nozzle 22 to pass through. The spray cap 24 is integrally formed, which effectively reduces production costs. During installation, it only needs to be aligned with the clips 13 of the body 1, without repeatedly aligning the axis 23, thereby achieving the purpose of uniform spraying after the spray cap 24 automatically aligns with the nozzle 22.

[0033] Please refer to the above-mentioned pressure regulating knob group 3. Figure 1 and Figure 2 As shown, the pressure regulating knob assembly 3 further includes a knob 31, a fixing screw 32, an adjusting bolt 33, a spring 34, a piston 35, and a bushing 36. The bushing 36 is placed in the side channel 14 of the main body 1, and the fixing screw 32 is connected to the side channel 14 and abuts against the bushing 36 for fixation. The knob 31 is pivotally connected to the fixing screw 32 and is also connected to the adjusting bolt 33. The adjusting bolt 33 is screwed and extends through the fixing screw 32. The bushing 36 is provided with a first air chamber 361 and a second air chamber 362. The piston 35 is located in the first air chamber 361 of the bushing 36, and the spring 34 is located between the piston 35 and the fixing screw 32.

[0034] For further information, please refer to [link / reference]. Figure 1 , Figure 2 and Figure 5 As shown, the pressure regulating knob assembly 3 further includes a sealing ring assembly 37, and the sealing ring assembly 37 is provided with a first sealing ring 371, a second sealing ring 372, a third sealing ring 373 and a fourth sealing ring 374. The first sealing ring 371 is located between the adjusting bolt 33 and the piston 35. The second sealing ring 372 and the third sealing ring 373 are located between the piston 35 and the bushing 36. The fourth sealing ring 374 is located between the bushing 36 and the side channel 14 of the body 1.

[0035] For the aforementioned trigger assembly 4, please refer to... Figure 1 and Figure 2 As shown, the trigger assembly 4 further includes a trigger 41 and an intake valve stem 42, wherein the trigger 41 is connected to a pivot point 15 provided on the body 1, and the intake valve stem 42 is connected to the trigger 41, and the intake valve stem 42 extends through the side channel 14 of the body 1, and the trigger assembly 4 is connected to the pressure regulating knob group 3 and the ejector pin 21.

[0036] Please refer to the above-mentioned spray cup 5. Figure 3 and Figure 4 As shown, the paint cup 5 is connected to a first inlet 112 provided in the pigment channel 11 of the main body 1, and the paint cup 5 is filled with pigment 7.

[0037] Therefore, this utility model provides a preferred solution for the structure of a paint spray gun. Please refer to [link / reference]. Figures 2 to 4As shown, the construction worker rotates the knob 31 of the pressure regulating knob group 3 together with the adjusting bolt 33 to adjust to the required working pressure, which is approximately between 22psi and 45psi. The gas passage 12 of the main body 1 is provided with a second inlet 122, which is connected to a pneumatic pipeline 6. The pneumatic pipeline 6 generates a first pressure P1 which enters the gas passage 12 of the main body 1 and flows from the gas passage 12 into the side passage 14. The first pressure P1 passes through the first air chamber 361 of the bushing 36.

[0038] For further information, please refer to [link / reference]. Figure 4 and Figure 5 As shown, the first pressure P1 sequentially passes through the gas passage 12, the side passage 14, the first gas chamber 361, and a hole 351 provided in the piston 35, entering the second gas chamber 362 from the first gas chamber 361. At this time, because the intake valve rod 42 blocks the gas passage 12, the first pressure P1 is pressurized in the second gas chamber 362 to form a second pressure P2. When the second pressure P2 is greater than the first pressure P1, the second pressure P2 pushes and compresses the spring 34, causing the piston 35 to move to the right. The piston 35's hole 351 is blocked by the adjusting bolt 33, thus preventing the first pressure P1 from entering the second air chamber 362 to form the second pressure P2. At this time, the first pressure P1 and the second pressure P2 are in balance. In particular, when the first pressure P1 and the second pressure P2 are in balance, the adjusting bolt 33 only needs to bear the second pressure P2. Therefore, the adjusting bolt 33 is more durable and not easily damaged. Moreover, the sealing ring assembly 37 required by this invention is less than that of conventional paint guns.

[0039] For further information, please refer to [link / reference]. Figures 4 to 6 As shown, the construction worker confirms that the second pressure P2 has reached the predetermined construction pressure, pulls the trigger 41, and the trigger 41 causes the intake valve rod 42 to move to the right in the side channel 14 to form a gap. The second pressure P2 flows along the gap into the gas channel 12. At this time, the second pressure P2 is less than the first pressure P1, and the piston 35 moves to the left, so that the first pressure P1 continues to supplement to form the second pressure P2.

[0040] For further information, please refer to [link / reference]. Figures 5 to 7As shown, the second pressure P2 flows along the gas channel 12 to the second outlet 121. At this time, the trigger 41 is still in the pulled state. The ejector pin 21 is displaced backward by the trigger 41, causing the pigment 7 in the paint cup 5 to pass through the first outlet 111 and the nozzle 22 by gravity. The pigment 7 and the second pressure P2 are mixed at the same time in the hole 242 of the spray cap 24. The second pressure P2 impacts the pigment 7, causing the pigment 7 to atomize and be evenly sprayed onto the surface of the object. After the construction is completed, the construction personnel release the trigger 41. The force stored in the deformation of the spring 34 will push the piston 35 to keep the first air chamber 361 and the second air chamber 362 unobstructed, thereby supplementing the first pressure P1 to form the second pressure P2.

[0041] It should be noted that the above description is the technical principle used in the specific embodiments of this utility model. Any changes made in accordance with the concept of this utility model, whose functions and effects do not exceed the spirit covered by this specification and drawings, shall be within the protection scope of this utility model and are hereby stated.

Claims

1. A paint spray gun structure, characterized in that, Includes: A body having a pigment channel, a gas channel and a side channel, wherein the pigment channel has a first outlet, the gas channel has a second outlet, the first outlet is adjacent to the second outlet, and the side channel is connected through the gas channel. A ejector assembly includes an ejector pin, a nozzle, and a spray cap. The ejector pin extends through and is connected to the pigment channel. The nozzle is connected to the first outlet of the body. Several long slots on the spray cap are connected to several clips on the surface of the body for fixation. The spray cap is aligned with an axis on the nozzle and covers the second outlet and the nozzle. The spray cap has a hole to allow the nozzle to pass through. A pressure regulating knob assembly, wherein the pressure regulating knob assembly is connected to the side channel of the main body; and A trigger assembly is connected to a pivot point provided on the main body, and the trigger assembly is connected to the gas passage and side passage of the main body, and the trigger assembly is linked to the pressure regulating knob group and the ejector pin of the ejector pin group.

2. The paint spray gun structure as described in claim 1, characterized in that: The pressure regulating knob assembly also includes a knob, a fixing screw, an adjusting bolt, a spring, a piston, and a bushing. The bushing is placed in the side channel of the main body, and the fixing screw is connected to the side channel and abuts against the bushing to form a fixation. The knob is pivotally connected to the fixing screw and is connected to the adjusting bolt. The adjusting bolt is screwed and extends through the fixing screw. The bushing has a first air chamber and a second air chamber. The piston is located in the first air chamber of the bushing. The spring is located between the piston and the fixing screw.

3. The paint spray gun structure as described in claim 2, characterized in that: The pressure regulating knob assembly also includes a sealing ring assembly, which has a first sealing ring, a second sealing ring, a third sealing ring and a fourth sealing ring. The first sealing ring is located between the adjusting bolt and the piston, the second sealing ring and the third sealing ring are located between the piston and the bushing, and the fourth sealing ring is located between the bushing and the side channel of the body.

4. The paint spray gun structure as described in claim 2, characterized in that: The gas passage of the main body is provided with a second inlet, and the second inlet is connected to a gas pressure pipeline.

5. The paint spray gun structure as described in claim 4, characterized in that: The pneumatic pipeline generates a first pressure that enters the gas passage of the body. The first pressure enters the second gas chamber through a hole provided in the piston, forming a second pressure. When the second pressure is greater than the first pressure, the second pressure pushes the piston to the right. The hole of the piston is blocked by the adjusting bolt, preventing the first pressure from entering the second gas chamber and forming the second pressure.

6. The paint spray gun structure as described in claim 1, characterized in that: The trigger assembly also includes a trigger and an intake valve stem. The trigger is connected to a pivot point of the body, and the intake valve stem is connected to the trigger and extends through a side passage of the body.

7. The paint spray gun structure as described in claim 1, characterized in that: It also includes a paint spray cup, which is connected to a first inlet in the pigment channel of the body.

8. The paint spray gun structure as described in claim 1, characterized in that: The body has several latches that are respectively arranged relative to each other with respect to the axis of the nozzle.

9. The paint spray gun structure as described in claim 1 or 8, characterized in that: The spray cap of the ejector pin assembly is integrally formed on the ejector pin assembly.

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