Airless spray gun

Abstract

The utility model discloses a kind of spray guns for airless spray machine, including spray gun main body, the outlet of spray gun main body is connected with extension tube by joint, the end of extension tube is connected with spray head by joint, the upper and lower edges of spray head outlet are evenly installed with sector plate, two sector plates are rotatably installed with two first rotation axes, two first rotation axes are respectively located at the left and right sides of spray head outlet, side baffle and first gear are installed on first rotation axis, side baffle is located between two sector plates, first gear is located at the top of upper sector plate, the top of upper sector plate is installed with strip-shaped limit block, limit block is installed with the bottom plate that can slide forwards and backwards, first rack is installed on the left and right sides of bottom plate, two first racks are respectively engaged with two first gears;The spray gun can make the bottom plate slide forwards and backwards on limit block by rotating knob, and then drive first gear and first rotation axis to rotate by first rack, realize the flexible adjustment of side baffle included angle.

Description

Technical Field

[0001] This utility model relates to the field of airless spraying machine technology, specifically to a spray gun for an airless spraying machine. Background Technology

[0002] Airless sprayers, as a highly efficient coating equipment, have been widely used in modern industrial production and architectural decoration. They can use a high-pressure pump to pressurize the paint to a high pressure, causing the paint to be sprayed out at high speed through the nozzle. During the spraying process, the paint is atomized into extremely fine particles, which are evenly attached to the surface of the object being coated, thus forming a smooth and dense coating. Compared with traditional air spraying, it has a higher paint utilization rate and avoids the waste caused by compressed air carrying away a large amount of paint.

[0003] As a key component of airless sprayers, the performance of the spray gun directly affects the spraying effect and quality. In the current airless sprayers, the spray width cannot be flexibly adjusted according to different spraying needs. To adjust the spray width, it is necessary to replace different models of nozzles, which is not only inconvenient, but also causes the nozzles to loosen due to wear on the joints.

[0004] Therefore, we have designed a spray gun for an airless sprayer to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a spray gun for an airless spraying machine to solve the problems mentioned in the background section.

[0006] This utility model provides the following technical solution: a spray gun for an airless spraying machine, comprising a spray gun body, an extension tube connected to the outlet of the spray gun body via a connector, a nozzle connected to the end of the extension tube via a connector, fan-shaped plates installed on the upper and lower edges of the nozzle outlet, two first rotating shafts rotatably mounted between the two fan-shaped plates, the two first rotating shafts being located on the left and right sides of the nozzle outlet respectively, a side baffle and a first gear installed on each of the first rotating shafts, the side baffles being located between the two fan-shaped plates, the first gear being located on the top of the upper fan-shaped plate, a strip-shaped limiting block installed on the top of the upper fan-shaped plate, a base plate that can slide back and forth installed on the limiting block, first racks installed on the left and right sides of the base plate, the two first racks meshing with the two first gears respectively, a housing installed on the top of the upper fan-shaped plate, the first gear, the limiting block, the base plate and the first racks being located inside the housing, a knob for controlling the back and forth sliding of the base plate being provided on the outside of the housing.

[0007] Preferably, a second rack parallel to the first rack is installed on the top of the base plate, a bracket is installed on the top of the inner cavity of the housing, a vertically arranged second rotating shaft is rotatably installed on the bracket, a second gear and a worm gear are installed on the second rotating shaft, the second gear meshes with the second rack, and a worm is also rotatably installed on the top of the inner cavity of the housing through a bearing seat, the worm cooperates with the worm gear, one end of the worm shaft passes through the housing, and a knob is fixedly installed on the worm shaft.

[0008] Preferably, the front side of the base plate has a slot parallel to the first rack, and the limiting block is also parallel to the first rack. The limiting block has an I-shaped cross-section, and the middle part of the limiting block is inserted into the slot of the base plate.

[0009] Preferably, rubber pads are affixed to the opposite sides of the two sector plates, the two side baffles are symmetrical to each other, and the upper and lower edges of the side baffles are in contact with the rubber pads of the upper and lower sector plates, respectively.

[0010] Preferably, the nozzle can be directly connected to the outlet of the spray gun body via a connector.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The airless spray gun allows the base plate to slide back and forth on the limit block by rotating a knob on the outside of the housing. This, in turn, drives the first gear and the first rotating shaft to rotate via the first rack, enabling flexible adjustment of the side baffle angle. This design allows operators to quickly and accurately change the spray width according to actual spraying needs, greatly improving the adaptability and efficiency of spraying operations. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the nozzle structure of this utility model; Figure 3 This is a schematic diagram of the inner structure of the sector-shaped plate of this utility model; Figure 4 This is a schematic diagram of the adjustment structure of this utility model; Figure 5 This is a partial enlarged view of section A of the present invention; Figure 6 This is a schematic diagram of the fit between the limiting block and the base plate of this utility model.

[0013] In the diagram: 1. Spray gun body; 2. Extension tube; 3. Nozzle; 4. Fan-shaped plate; 5. First rotating shaft; 6. Side baffle; 7. First gear; 8. Limiting block; 9. Base plate; 10. First rack; 11. Second rack; 12. Housing; 13. Bracket; 14. Second rotating shaft; 15. Second gear; 16. Worm gear; 17. Worm; 18. Knob. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Example 1: Please refer to Figures 1-6 This utility model provides a spray gun for an airless spraying machine, comprising a spray gun body 1. An extension tube 2 is connected to the outlet of the spray gun body 1 via a connector. A nozzle 3 is connected to the end of the extension tube 2 via a connector. Sector-shaped plates 4 are installed on the upper and lower edges of the nozzle 3 outlet. Two first rotating shafts 5 are rotatably mounted between the two sector-shaped plates 4, located on the left and right sides of the nozzle 3 outlet, respectively. Side baffles 6 and first gears 7 are installed on each of the two first rotating shafts 5. The side baffles 6 are located between the two sector-shaped plates 4, and the first gears 7 are located at the top of the upper sector-shaped plate 4. A strip-shaped limiting block 8 is installed on the top of the square sector plate 4. The limiting block 8 has an I-shaped cross-section. A base plate 9 that can slide back and forth is installed on the limiting block 8. A slot parallel to the first rack 10 is opened on the front side of the base plate 9. The middle part of the limiting block 8 is inserted into the slot of the base plate 9. First racks 10 are installed on both the left and right sides of the base plate 9. The two first racks 10 mesh with the two first gears 7 respectively. A housing 12 is installed on the top of the upper sector plate 4. The first gears 7, limiting blocks 8, base plate 9 and first racks 10 are all located inside the housing 12. The top of the base plate 9... A second rack 11 parallel to the first rack 10 is installed. A bracket 13 is installed at the top of the inner cavity of the housing 12. A vertically arranged second rotating shaft 14 is rotatably mounted on the bracket 13. A second gear 15 and a worm gear 16 are mounted on the second rotating shaft 14. The second gear 15 meshes with the second rack 11. A worm 17 is also rotatably mounted at the top of the inner cavity of the housing 12 via a bearing seat. The worm 17 cooperates with the worm gear 16. One end of the worm 17 shaft passes through the housing 12. A knob 18 is fixedly mounted on the shaft of the worm 17. Rotating the knob 18 can drive the worm 17 to rotate. This drives the worm gear 16, the second rotating shaft 14, and the second gear 15 to rotate. The second gear 15 meshes with the second rack 11, causing the base plate 9 to slide back and forth on the limiting block 8. The first racks 10 on the left and right sides of the base plate 9 drive the first gear 7 to rotate, thereby adjusting the included angle between the two side baffles 6 to change the spray width. Rubber pads are attached to the opposite sides of the two fan-shaped plates 4. The two side baffles 6 are symmetrical to each other. The upper and lower edges of the side baffles 6 contact the rubber pads of the upper and lower fan-shaped plates 4 respectively, which can prevent the paint from leaking from the gap between the side baffles 6 and the fan-shaped plates 4.

[0016] Example 2: Based on Example 1, the nozzle 3 in this example is directly connected to the outlet of the spray gun body 1 through a connector, omitting the extension tube 2. The other structures are the same as in Example 1. Similarly, rotating the knob 18 drives the worm gear 17, worm wheel 16, second rotating shaft 14, second gear 15 and other components to move, causing the base plate 9 to slide back and forth, thereby adjusting the included angle between the two side baffles 6 to achieve the adjustment of the spraying width. The rubber pads on the two fan-shaped plates 4 and the two symmetrical side baffles 6 also play the role of preventing paint leakage.

[0017] Example 3: Based on the structure of Example 1, this example improves the materials of the fan-shaped plate 4 and the side baffle 6. The fan-shaped plate 4 is made of high-strength plastic, which is lightweight and corrosion-resistant. The side baffle 6 is made of metal with a special surface treatment, which has good wear resistance and smoothness, reducing the adhesion of paint on the surface of the side baffle 6 and improving the spraying effect. The connection and operation of other components remain unchanged. The included angle of the side baffle 6 can be adjusted by rotating the knob 18 to adjust the width of the spraying fan. At the same time, the rubber pads on the two fan-shaped plates 4 and the two symmetrical side baffles 6 still play the role of preventing paint leakage.

[0018] Operating Procedure: During preparation, check that all parts of the spray gun are securely connected, including the joints between the spray gun body 1 and the extension tube 2, and between the extension tube 2 and the nozzle 3, ensuring there is no looseness. Check that the rubber pads on the opposite side of the two fan-shaped plates 4 are intact; if damaged, replace them promptly to ensure the seal between the side baffle 6 and the fan-shaped plates 4 and prevent paint leakage. Confirm that the side baffle 6 can rotate freely without any jamming. After the inspection, connect the spray gun body 1 to the feed port of the airless sprayer using a hose and check that the paint can be smoothly delivered to the nozzle 3.

[0019] Based on the actual spraying requirements, the required spraying width is initially determined. If a narrower spraying width is required, the included angle of the side baffle 6 can be adjusted to be smaller. If a wider spraying width is required, the included angle of the side baffle 6 can be adjusted to be larger. During adjustment, rotate the knob 18 on the outside of the housing 12. The knob 18 drives the worm gear 17 to rotate. The worm gear 17 cooperates with the worm wheel 16, causing the worm wheel 16 to drive the second rotating shaft 14 to rotate. The second gear 15 on the second rotating shaft 14 rotates accordingly. Since the second gear 15 meshes with the second rack 11 on the top of the base plate 9, the base plate 9 will slide back and forth on the limit block 8. The first racks 10 on the left and right sides of the base plate 9 drive the two first gears 7 to rotate, thereby causing the two first rotating shafts 5 to drive the side baffle 6 to rotate. Adjust the included angle between the two side baffles 6 until the estimated spraying width is achieved.

[0020] During spraying, turn on the airless sprayer, and the paint will be delivered from the spray gun body 1 through the extension tube 2 to the nozzle 3 under pressure. Hold the spray gun and keep the nozzle 3 at an appropriate distance and angle from the surface to be sprayed. Press the trigger of the spray gun, and the paint will be sprayed out from the nozzle 3. Under the restriction of the two side baffles 6, a spraying area of ​​a specific width will be formed. During the spraying process, the included angle of the side baffles 6 can be adjusted by rotating the knob 18 at any time according to the actual spraying effect to change the spraying width and meet the spraying needs of different parts. For example, for smaller workpieces or areas that require fine spraying, the included angle of the side baffles 6 can be reduced to narrow the spraying range; for larger planes or areas that need to be covered quickly, the included angle of the side baffles 6 can be increased to expand the spraying range.

[0021] After the work is completed, first turn off the airless sprayer and stop the paint delivery. Remove the spray gun from the sprayed surface, check all parts of the spray gun again, and clean the residual paint from the nozzle 3, side baffle 6, etc., to prevent the paint from affecting the normal use of the spray gun after it dries. Finally, store the spray gun properly to avoid collision and damage.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An airless spray gun for use in an airless sprayer comprising a spray gun body (1), characterised in that: The nozzle body (1) of the spray gun is connected to an extension tube (2) via a connector at its outlet. The end of the extension tube (2) is connected to a nozzle (3) via a connector. Sector plates (4) are installed on the upper and lower edges of the nozzle (3) outlet. Two first rotating shafts (5) are rotatably installed between the two sector plates (4). The two first rotating shafts (5) are located on the left and right sides of the nozzle (3) outlet, respectively. Side baffles (6) and first gears (7) are installed on the first rotating shafts (5). The side baffles (6) are located between the two sector plates (4), and the first gears (7) are located on the top of the upper sector plate (4). A strip-shaped limiting block (8) is installed on the top of the upper fan-shaped plate (4). A base plate (9) that can slide back and forth is installed on the limiting block (8). A first rack (10) is installed on both the left and right sides of the base plate (9). The two first racks (10) mesh with two first gears (7) respectively. A housing (12) is installed on the top of the upper fan-shaped plate (4). The first gear (7), the limiting block (8), the base plate (9) and the first rack (10) are all located inside the housing (12). A knob (18) for controlling the back and forth sliding of the base plate (9) is provided on the outside of the housing (12).

2. An airless sprayer gun according to claim 1, characterized in that: The top of the base plate (9) is equipped with a second rack (11) parallel to the first rack (10). The top of the inner cavity of the housing (12) is equipped with a bracket (13). A vertically arranged second rotating shaft (14) is rotatably mounted on the bracket (13). A second gear (15) and a worm wheel (16) are mounted on the second rotating shaft (14). The second gear (15) meshes with the second rack (11). The top of the inner cavity of the housing (12) is also rotatably mounted with a worm (17) through a bearing seat. The worm (17) cooperates with the worm wheel (16). One end of the worm (17) shaft passes through the housing (12). A knob (18) is fixedly mounted on the worm (17) shaft.

3. The spray gun for an airless spraying machine according to claim 1, characterized in that: The front side of the base plate (9) has a slot parallel to the first rack (10), and the limiting block (8) is also parallel to the first rack (10). The cross-sectional shape of the limiting block (8) is I-shaped, and the middle part of the limiting block (8) is inserted into the slot of the base plate (9).

4. The spray gun for an airless spraying machine according to claim 1, characterized in that: The two fan-shaped plates (4) are each covered with a rubber pad on their opposite sides. The two side baffles (6) are symmetrical to each other, and the upper and lower edges of the side baffles (6) are in contact with the rubber pads of the upper and lower fan-shaped plates (4) respectively.

5. The spray gun for an airless spraying machine according to claim 1, characterized in that: The nozzle (3) can be directly connected to the outlet of the spray gun body (1) via a connector.

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