Airless point spray nozzle mechanism

Abstract

This invention provides a point-spray nozzle mechanism without an air source, belonging to the technical field of nozzle mechanisms. It includes a linear motor, a frame assembly, and a frame housing, with the frame housing mounted on one side of the frame assembly. The linear motor is mounted on one end of the frame housing, and a telescopic rod is provided at the end of the linear motor, located inside the frame housing. The mechanism also includes a torsion spring, a check pawl, a ratchet gear assembly, a rack assembly, a slider guide plate assembly, a connecting rod, and a nozzle assembly. The slider guide plate assembly is mounted on the side of the frame assembly near the frame housing. The ratchet gear assembly is also mounted on the side of the frame assembly near the frame housing. In this invention, the air atomizing nozzle has a simple structure and can atomize liquid within the atomizing chamber without an air source input, saving equipment space and processing costs. It can achieve point spraying within one cycle, with good coordination between air and liquid spraying, resulting in excellent point spraying quality.

Description

Technical Field

[0001] This invention belongs to the field of nozzle mechanism technology, and particularly relates to a nozzle mechanism without an air source point spray. Background Technology

[0002] An air atomizing nozzle is a device that can atomize and spray liquids, suspending them evenly in the air; it is widely used in fields such as spray painting and industrial furnaces. Chinese Patent Application No. 202022826641.6 discloses an internally mixed air atomizing nozzle, relating to the field of liquid atomization technology. It includes a gas-liquid delivery assembly, an end cap, and a liquid spray volume adjustment assembly. The gas-liquid delivery assembly has a liquid flow channel and an air flow channel. The end cap has a nozzle at its head and a gas-liquid mixing channel connected to the nozzle inside the end cap. The liquid spray volume adjustment assembly includes a plunger body. A conical guide hole is provided at the output end of the liquid flow channel. A conical head corresponding to the shape of the conical guide hole is provided at the front end of the plunger body. The liquid flow channel is connected to the gas-liquid mixing channel through the conical guide hole, and the air flow channel is connected to the gas-liquid mixing channel. The plunger body is movably inserted into the liquid flow channel, with a clearance fit between the plunger body and the liquid flow channel, and the conical head is located within the conical guide hole. In this invention, the atomization effect of the nozzle can be adjusted by changing the position of the plunger body, allowing the atomizing nozzle to spray liquid droplets of different sizes to meet different liquid droplet requirements, making it practical and flexible. However, existing air atomizing nozzles require an air source for inputting the atomizing medium, which leads to complex equipment and increased production costs; therefore, it is necessary to invent an air source-free point spray nozzle mechanism. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a point spray nozzle mechanism without air source, including a linear motor, a frame assembly and a frame housing, wherein the frame housing is installed on one side of the frame assembly; the linear motor is installed at one end of the frame housing, and a telescopic rod is provided at the end of the linear motor, the telescopic rod being located inside the frame housing; It also includes a torsion spring, a check pawl, a ratchet gear assembly, a rack assembly, a slider guide plate assembly, a connecting rod, and a nozzle assembly. The slider guide plate assembly is installed on the side of the frame assembly near the frame housing. The ratchet gear assembly is installed on the side of the frame assembly near the frame housing, and is located above the slider guide plate assembly. The rack assembly is installed on the end of the telescopic rod away from the linear motor. The nozzle assembly is installed on the side of the frame assembly near the frame housing, away from the linear motor, and the end of the nozzle assembly is connected to the outer edge of the ratchet gear assembly via a connecting rod. The check pawl is installed above the side of the frame assembly near the frame housing, and the lower end of the check pawl is engaged with the upper edge of the ratchet gear assembly. The torsion spring is installed above the side of the frame assembly near the frame housing, and is located inside the check pawl.

[0004] Preferably, the frame assembly includes a convex shaft, a stop shaft, a guide rail, a fixing hole, and a frame, wherein the fixing hole is formed on the frame; the convex shaft is installed on the upper side of the frame near the frame housing; the stop shaft is installed on the upper side of the frame near the frame housing, and the stop shaft is located above the convex shaft; the guide rail is installed on the lower side of the side near the frame housing opposite to the linear motor.

[0005] Preferably, the ratchet gear assembly includes a ratchet, a gear, and a gear train shaft. One end of the gear train shaft is mounted in a fixing hole via a bushing. The gear is mounted on the outside of the gear train shaft. The ratchet is mounted on the outside of the gear train shaft and is located in front of the gear.

[0006] Preferably, the rack assembly includes a rack connecting panel, a rack guide slider, a rack guide rod, a rack guide rod directional slider, and a pneumatic valve push-pull guide plate. One end of the rack connecting panel is connected to the end of the telescopic rod opposite to the linear motor. The rack guide rod is installed on the rack connecting panel at the end opposite to the linear motor. The rack guide rod directional slider is installed on the rack guide rod at the end opposite to the linear motor, and the rack guide rod directional slider is sleeved inside the guide rail. The rack guide slider is installed on the rear side of the rack connecting panel. The pneumatic valve push-pull guide plate is installed on the front side of the rack connecting panel.

[0007] Preferably, the slider guide plate assembly includes an annular guide rail, a guide paddle shaft, a paddle torsion spring, and a guide paddle. The annular guide rail is installed on the front side of the frame; the guide paddle shaft is installed at both ends of the annular guide rail; the guide paddle is sleeved on the outside of the guide paddle shaft; the paddle torsion spring is sleeved on the outside of the guide paddle shaft, and the paddle torsion spring is located inside the guide paddle.

[0008] Preferably, the nozzle assembly includes a nut, a pin slider, an inner cylinder, a liquid flow channel, a limiting nut, a spring, a pin, a nozzle, a liquid flow channel hole, a sealing ring, an atomizing gas cover, a gas channel hole, a pointed nozzle hole, an inner cylinder one-way valve, an outer cylinder one-way valve, an outer cylinder, a cylinder piston, a large sealing ring, and a push-pull rod. The outer cylinder is installed on the front side of the frame, away from the linear motor. The inner cylinder is installed inside the outer cylinder. The atomizing gas cover is installed on both the outer and inner cylinders, away from the linear motor. The pin slider is installed inside the inner cylinder, near the linear motor. The nut is threaded onto the pin slider, and one end of the nut is hinged to a connecting rod. The pin is installed inside the inner cylinder, away from the nut. The limiting nut is installed between the pin and the nut. The spring... A spring sleeve is fitted on the outside of the limiting nut; the liquid flow channel is opened inside the inner wall of the liquid flow channel; the nozzle is fixed to the inner cylinder of the cylinder by threads, and a sealing ring is sandwiched between the nozzle and the inner cylinder of the cylinder; the liquid flow channel hole is opened at the end of the liquid flow channel away from the nut, and the liquid flow channel hole allows the liquid flow channel to communicate with the inside of the inner cylinder of the cylinder; the gas passage hole is set between the inner cylinder of the cylinder and the outer cylinder of the cylinder; the pointed hole is opened at the end of the nozzle away from the nut; the inner cylinder one-way valve is installed at the end of the gas passage hole near the nozzle; the nozzle is installed inside the outer cylinder of the cylinder near the nozzle; the cylinder piston is fitted on the outside of the inner cylinder of the cylinder; the large sealing ring is fitted on the outside of the cylinder piston; one end of the push-pull rod is connected to the side of the cylinder piston near the linear motor, and the other end of the push-pull rod is connected to the valve push-pull guide plate.

[0009] Preferably, one end of the torsion spring contacts the stop shaft; the anti-return pawl contacts the ratchet; a rack is provided above the rack connecting panel, and the rack meshes with the gear; the rack guide slider is located inside the annular guide rail, and the rack guide slider moves along the annular guide rail; the size of the rack guide rod limiting slider matches the size of the inner side of the guide rail.

[0010] Preferably, the end of the nut is located on the outside of the cylinder outer cylinder; the end of the liquid flow channel is connected to the liquid supply system via a connector; the inner cylinder one-way valve is used to allow gas to flow unidirectionally from between the cylinder inner cylinder and the cylinder outer cylinder to the cylinder outer cylinder; the outer cylinder one-way valve is used to allow gas to flow unidirectionally from the outside of the equipment to the cylinder outer cylinder; the outer side of the cylinder piston is in contact with the inner wall of the cylinder outer cylinder; the outer side of the large sealing ring is in contact with the inner wall of the cylinder outer cylinder.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. In this invention, the air atomizing nozzle has a simple structure and can atomize liquid in the atomizing chamber without the input of atomizing gas from an air source, thus saving equipment space and processing costs; 2. In this invention, point spraying within a cycle can be achieved, and the air jet and liquid spray can be well coordinated, thereby obtaining good point spraying quality. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention.

[0013] Figure 2 This is a schematic diagram of the internal structure of the present invention.

[0014] Figure 3 This is the invention Figure 2 Enlarged structural diagram at point A in the middle.

[0015] Figure 4 This is a structural schematic diagram of the rack assembly of the present invention.

[0016] Figure 5 This is a schematic diagram of the ratchet gear assembly of the present invention.

[0017] Figure 6 This is a schematic diagram of the rack assembly of the present invention.

[0018] Figure 7 This is a structural schematic diagram of the slider guide plate assembly of the present invention.

[0019] Figure 8 This is a schematic diagram of the nozzle assembly of the present invention.

[0020] In the picture: 1. Linear motor; 2. Frame assembly; 21. Cam shaft; 22. Stop shaft; 23. Guide rail; 24. Fixing hole; 25. Frame; 3. Torsion spring; 4. Anti-return pawl; 5. Ratchet gear assembly; 51. Ratchet; 52. Gear; 53. Gear train shaft; 6. Rack assembly; 61. Rack connecting panel; 62. Rack guide slider; 63. Rack guide rod; 64. Rack guide rod limiting slider; 65. Air valve push-pull guide plate; 7. Slider guide rail plate assembly; 71. Circular guide rail; 72. Guide paddle shaft; 73. Paddle torsion spring; 74. Guide 9. Paddle shifter; 8. Connecting rod; 9. Nozzle assembly; 91. Nut; 92. Ejector pin slider; 93. Cylinder inner cylinder; 94. Liquid flow channel; 95. Limit nut; 96. Spring; 97. Ejector pin; 98. Nozzle; 99. Liquid flow channel hole; 910. Sealing ring; 911. Atomizing gas hood; 912. Gas passage hole; 913. Tip hole; 914. Inner cylinder one-way valve; 915. Outer cylinder one-way valve; 916. Cylinder outer cylinder; 917. Cylinder piston; 918. Large sealing ring; 919. Push-pull rod; 10. Frame housing. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings: Example: As attached Figure 1 To be continued Figure 8 As shown The present invention provides a point spray nozzle mechanism without air source, including a linear motor 1, a frame assembly 2 and a frame housing 10. The frame housing 10 is installed on one side of the frame assembly 2; the linear motor 1 is installed at one end of the frame housing 10, and a telescopic rod is provided at the end of the linear motor 1, which is located inside the frame housing 10. In this embodiment, the air-source-free nozzle mechanism further includes a torsion spring 3, a check pawl 4, a ratchet gear assembly 5, a rack assembly 6, a slider guide plate assembly 7, a connecting rod 8, and a nozzle assembly 9. The slider guide plate assembly 7 is installed on the side of the frame assembly 2 near the frame housing 10; the ratchet gear assembly 5 is installed on the side of the frame assembly 2 near the frame housing 10, and the ratchet gear assembly 5 is located above the slider guide plate assembly 7; the rack assembly 6 is installed on the end of the telescopic rod away from the linear motor 1; and the nozzle assembly 9 is installed on the frame assembly. The end of component 2 facing away from the linear motor 1 is located near the frame housing 10, and the end of the nozzle assembly 9 is connected to the outer edge of the ratchet gear assembly 5 via the connecting rod 8; the check pawl 4 is installed on the upper part of the frame assembly 2 near the frame housing 10, and the lower end of the check pawl 4 is engaged with the upper edge of the ratchet gear assembly 5; the torsion spring 3 is installed on the upper part of the frame assembly 2 near the frame housing 10, and the torsion spring 3 is located inside the check pawl 4; one end of the torsion spring 3 contacts the stop shaft 22; the check pawl 4 contacts the ratchet 51.

[0022] In this embodiment, the frame assembly 2 includes a convex shaft 21, a stop shaft 22, a guide rail 23, a fixing hole 24, and a frame 25. The fixing hole 24 is formed on the frame 25. The convex shaft 21 is installed on the upper side of the frame 25 near the frame housing 10. The stop shaft 22 is installed on the upper side of the frame 25 near the frame housing 10, and the stop shaft 22 is located above the convex shaft 21. The guide rail 23 is installed on the lower side of the side near the frame housing 10 away from the linear motor 1.

[0023] In this embodiment, the ratchet gear assembly 5 includes a ratchet 51, a gear 52, and a gear train shaft 53. One end of the gear train shaft 53 is installed in the fixing hole 24 through a bushing. The gear 52 is installed on the outside of the gear train shaft 53. The ratchet 51 is installed on the outside of the gear train shaft 53 and is located in front of the gear 52.

[0024] In this embodiment, the rack assembly 6 includes a rack connecting panel 61, a rack guide slider 62, a rack guide rod 63, a rack guide rod limiting slider 64, and a valve push-pull guide plate 65. One end of the rack connecting panel 61 is connected to the end of the telescopic rod away from the linear motor 1. The rack guide rod 63 is installed on the end of the rack connecting panel 61 away from the linear motor 1. The rack guide rod limiting slider 64 is installed on the end of the rack guide rod 63 away from the linear motor 1, and the rack guide rod limiting slider 64 is sleeved inside the guide rail 23. The rack guide slider 62 is installed on the rear side of the rack connecting panel 61. The valve push-pull guide plate 65 is installed on the front side of the rack connecting panel 61. A rack is provided above the rack connecting panel 61, and the rack meshes with the gear 52. The rack guide slider 62 is located inside the annular guide rail 71, and the rack guide slider 62 moves along the annular guide rail 71. The size of the rack guide rod limiting slider 64 matches the size of the inner side of the guide rail 23.

[0025] In this embodiment, the slider guide plate assembly 7 includes an annular guide rail 71, a guide paddle shaft 72, a paddle torsion spring 73, and a guide paddle 74. The annular guide rail 71 is installed on the front side of the frame 25; the guide paddle shaft 72 is installed at both ends of the annular guide rail 71; the guide paddle 74 is sleeved on the outside of the guide paddle shaft 72; the paddle torsion spring 73 is sleeved on the outside of the guide paddle shaft 72, and the paddle torsion spring 73 is located inside the guide paddle 74.

[0026] In this embodiment, the nozzle assembly 9 includes a nut 91, a pin slider 92, a cylinder inner cylinder 93, a liquid flow channel 94, a limit nut 95, a spring 96, a pin 97, a nozzle 98, a liquid flow channel hole 99, a sealing ring 910, an atomizing gas cover 911, a gas channel hole 912, a pointed nozzle hole 913, an inner cylinder one-way valve 914, an outer cylinder one-way valve 915, a cylinder outer cylinder 916, a cylinder piston 917, a large sealing ring 918, and a push-pull rod 919. The cylinder outer cylinder 916 is installed on the front side of the frame 25 away from the linear motor 1; the cylinder inner cylinder 93 is installed inside the cylinder outer cylinder 916; and the atomizing gas cover 911 is installed on the cylinder outer cylinder 916. The outer cylinder 916 and the inner cylinder 93 are located away from the linear motor 1 at one end; the ejector pin slider 92 is installed inside the inner cylinder 93 near the linear motor 1 at one end; the nut 91 is threadedly fixed to the ejector pin slider 92, and one end of the nut 91 is hinged to the connecting rod 8; the ejector pin 97 is installed inside the inner cylinder 93 away from the nut 91 at one end; the limiting nut 95 is installed between the ejector pin 97 and the nut 91; the spring 96 is sleeved on the outside of the limiting nut 95; the liquid flow channel 94 is opened in the inner wall of the liquid flow channel 94; the nozzle 98 is threadedly fixed to the inner cylinder 93, and a sealing ring 910 is sandwiched between the nozzle 98 and the inner cylinder 93. The liquid flow channel hole 99 is located at the end of the liquid flow channel 94 away from the nut 91, and the liquid flow channel hole 99 connects the liquid flow channel 94 with the interior of the cylinder inner cylinder 93; the gas passage hole 912 is located between the cylinder inner cylinder 93 and the cylinder outer cylinder 916; the pointed nozzle hole 913 is located at the end of the nozzle 98 away from the nut 91; the inner cylinder one-way valve 914 is installed at the end of the gas passage hole 912 near the nozzle 98; the nozzle 98 is installed inside the cylinder outer cylinder 916 near the nozzle 98; the cylinder piston 917 is sleeved on the outside of the cylinder inner cylinder 93; the large sealing ring 918 is sleeved on the outside of the cylinder piston 917; the push-pull rod 919... The end of the piston 917 is connected to the side of the linear motor 1, and the other end of the push-pull rod 919 is connected to the valve push-pull guide plate 65; the end of the nut 91 is located on the outside of the cylinder outer cylinder 916; the end of the liquid flow channel 94 is connected to the liquid supply system through a connector; the inner cylinder one-way valve 914 is used to allow gas to flow unidirectionally from between the cylinder inner cylinder 93 and the cylinder outer cylinder 916 into the cylinder inner cylinder 93; the outer cylinder one-way valve 915 is used to allow gas to flow unidirectionally from the outside of the equipment into the cylinder outer cylinder 916; the outer side of the piston 917 is in contact with the inner wall of the cylinder outer cylinder 916; the outer side of the large sealing ring 918 is in contact with the inner wall of the cylinder outer cylinder 916.

[0027] Working principle In this invention, when the equipment starts working, the liquid supply system starts working, and the liquid such as paint enters the nozzle assembly 9 through the liquid flow channel 94, and then enters the cavity of the nozzle 98 through the liquid flow channel 94 and the liquid flow channel hole 99 in sequence; the sealing ring 910 has a sealing function, preventing the liquid in the cavity of the nozzle 98 from flowing to the left; the ejector pin 97 and the inner conical surface of the nozzle 98 form a mechanical seal under pressure, preventing the liquid in the cavity of the nozzle 98 from flowing to the right, so that the cavity of the nozzle 98 remains stationary and no longer flows; When the linear motor 1 is started, the telescopic rod moves forward, driving the rack assembly 6 to move forward. The teeth on the rack assembly 6 drive the ratchet gear assembly 5 to rotate counterclockwise. Since the rack guide rod 63 on the rack assembly 6 is embedded in the annular guide rail 71, the rack moves along the direction restricted by the annular guide rail 71. Furthermore, since the rack guide rod limiting slider 64 is embedded in the guide rail 23, and the rack guide rod 63 is sleeved in the rack guide rod limiting slider 64, the rack assembly 6 remains horizontal throughout the movement.

[0028] As the telescopic rod moves forward, the rack guide slider 62 drives the ratchet gear assembly 5 to rotate, causing the connecting rod 8 to push the nut 91 and the ejector pin slider 92 forward. Due to the buffering effect of the spring 96, the ejector pin 97 does not move, and the liquid in the nozzle 98 cavity remains stationary. At the same time, the forward movement of the rack assembly 6 causes the valve push-pull guide 65 to push the cylinder piston 917 to the left via the push-pull rod 919, thereby compressing the gas between the inner cylinder 93 and the outer cylinder 916. Because the outer cylinder 916 is equipped with an outer cylinder one-way valve 915, the function of the outer cylinder one-way valve 915 is to allow gas to flow only from the set... The gas flows from the outer cylinder to the outer cylinder 916, and the inner cylinder 93 has a one-way valve 914. The function of the one-way valve 914 is to allow gas to flow only from between the inner cylinder 93 and the outer cylinder 916 into the inner cylinder 93. Therefore, the gas between the inner cylinder 93 and the outer cylinder 916 is compressed and enters the space enclosed by the inner wall of the atomizing gas cover 911 and the outer wall of the nozzle 98 through the one-way valve 914 and the gas passage hole 912, and is finally discharged through the nozzle hole 913. Because the shortest distance between the nozzle hole 913 on the atomizing gas cover 911 and the outer wall of the nozzle 98 is small, the gas pressure discharged from the nozzle hole 913 is high. As the rack assembly 6 continues to move forward, the cam 21 hinged to the connecting rod 8 on the ratchet gear assembly 5, after passing the rightmost position, begins to move to the left. At this time, the ratchet gear assembly 5 drives the connecting rod 8, nut 91, and ejector pin slider 92 to move to the left. Meanwhile, the spring 96 gradually changes from a compressed state to a free state, and the contact pressure between the ejector pin 97 and the inner conical surface of the nozzle 98 gradually decreases. Finally, the ejector pin 97 moves to the left under the action of the ejector pin slider 92 through the limit nut 95. Under the action of liquid pressure, the liquid in the nozzle 98 cavity is ejected to the right and exits the nozzle assembly 9. At this time, the rack assembly 6 is still moving forward, so there is still high-pressure gas around the right tip of the nozzle 98, which atomizes the liquid that has just been sprayed out under the action of high-pressure gas.

[0029] As the rack assembly 6 continues to move forward, the cam 21 on the ratchet gear assembly 5, which is hinged to the connecting rod 8, passes through the highest point and the leftmost position in sequence and then begins to move to the right. At this time, the ratchet gear assembly 5 drives the connecting rod 8, nut 91, and ejector pin slider 92 to move to the right, and gradually compresses the spring 96 to make the ejector pin 97 press against the inner conical surface of the nozzle 98 to achieve a sealing effect, so that the liquid in the nozzle 98 cavity no longer flows out. When rack 6 disengages from gear 52, ratchet gear assembly 5 rotates a full revolution and returns to its original position. Because spring 96 is in a compressed state, spring 96 pushes nut 91 to move to the left, which in turn pushes ratchet gear assembly 5 to rotate clockwise through connecting rod 8. Under the action of check pawl 4, ratchet gear assembly 5 is kept in its initial position.

[0030] As the telescopic rod continues to push, the liquid stops spraying, but the gas continues to spray. During this process, the rack guide slider 62 pushes open the guide plate 74, and the guide plate 74 returns to its original position under the action of the plate torsion spring 73. When the telescopic rod is pulled back, the liquid in the nozzle 98 cavity still does not flow out because the rack assembly 6 disengages from the gear 52. The rack assembly 6 drives the air valve push-pull guide 65 to move to the left, which in turn drives the push-pull rod 919 and the cylinder piston 917 to move to the left, causing the gas outside the equipment to enter the space enclosed by the cylinder outer cylinder 916 and the cylinder inner cylinder 93 through the outer cylinder one-way air valve 915, thus realizing the cylinder inflation. The rack guide slider 62 pushes open the guide plate 74 and returns to its original position under the action of the plate torsion spring 73. The telescopic rod begins to push to the left, and rack 6 contacts and meshes with gear 52, returning to the initial position and completing one spray cycle.

[0031] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solutions described in this invention, or by designing similar technical solutions by those skilled in the art under the inspiration of the technical solutions described in this invention, falls within the protection scope of this invention.

Claims

1. A nozzle mechanism without an air source, characterized in that: The assembly includes a linear motor (1), a frame assembly (2), and a frame housing (10). The frame housing (10) is mounted on one side of the frame assembly (2). The linear motor (1) is mounted on one end of the frame housing (10), and a telescopic rod is provided at the end of the linear motor (1), which is located inside the frame housing (10). It also includes a torsion spring (3), a check pawl (4), a ratchet gear assembly (5), a rack assembly (6), a slider guide plate assembly (7), a connecting rod (8), and a nozzle assembly (9). The slider guide plate assembly (7) is mounted on the side of the frame assembly (2) near the frame housing (10); the ratchet gear assembly (5) is mounted on the side of the frame assembly (2) near the frame housing (10), and the ratchet gear assembly (5) is located above the slider guide plate assembly (7); the rack assembly (6) is mounted on the end of the telescopic rod away from the linear motor (1); the nozzle assembly... The nozzle assembly (9) is installed on the side of the frame assembly (2) near the frame housing (10) away from the linear motor (1), and the end of the nozzle assembly (9) is connected to the outer edge of the ratchet gear assembly (5) via the connecting rod (8); the check pawl (4) is installed on the upper side of the frame assembly (2) near the frame housing (10), and the lower end of the check pawl (4) is engaged with the upper edge of the ratchet gear assembly (5); the torsion spring (3) is installed on the upper side of the frame assembly (2) near the frame housing (10), and the torsion spring (3) is located inside the check pawl (4); One end of the rack connecting panel (61) is connected to the end of the telescopic rod away from the linear motor (1); the air valve push-pull guide plate (65) is installed on the front side of the rack connecting panel (61); The nozzle assembly (9) includes a nut (91), a pin slider (92), a cylinder inner cylinder (93), a liquid flow channel (94), a limit nut (95), a spring (96), a pin (97), a nozzle (98), a liquid flow channel hole (99), a sealing ring (910), an atomizing gas hood (911), a gas passage hole (912), a nozzle hole (913), an inner cylinder one-way valve (914), an outer cylinder one-way valve (915), a cylinder outer cylinder (916), a cylinder piston (917), a large sealing ring (918), and a push-pull rod (919). The cylinder outer cylinder (916) is mounted on the frame ( 25) The front end is away from the linear motor (1); the cylinder inner cylinder (93) is installed inside the cylinder outer cylinder (916); the atomizing gas cover (911) is installed on the cylinder outer cylinder (916) and the cylinder inner cylinder (93) away from the linear motor (1); the ejector pin slider (92) is installed inside the cylinder inner cylinder (93) near the linear motor (1); the nut (91) is fixed to the ejector pin slider (92) by threads, and one end of the nut (91) is hinged to the connecting rod (8); the ejector pin (97) is installed inside the cylinder inner cylinder (93) away from the nut (91); The limiting nut (95) is installed between the ejector pin (97) and the nut (91); the spring (96) is sleeved on the outside of the limiting nut (95); the liquid flow channel (94) is opened in the inner wall of the liquid flow channel (94); the nozzle (98) is fixed to the cylinder inner cylinder (93) by threads, and a sealing ring (910) is sandwiched between the nozzle (98) and the cylinder inner cylinder (93); the liquid flow channel hole (99) is opened at the end of the liquid flow channel (94) away from the nut (91), and the liquid flow channel hole (99) makes the liquid flow channel (94) communicate with the interior of the cylinder inner cylinder (93); the gas passage hole (912) is set in the cylinder inner cylinder (93) and the cylinder outer cylinder (93). Between 916); the pointed hole (913) is opened at the end of the nozzle (98) away from the nut (91); the inner cylinder one-way air valve (914) is installed at the end of the gas passage hole (912) near the nozzle (98); the nozzle (98) is installed inside the cylinder outer cylinder (916) near the nozzle (98); the cylinder piston (917) is sleeved on the outside of the cylinder inner cylinder (93); the large sealing ring (918) is sleeved on the outside of the cylinder piston (917); one end of the push-pull rod (919) is connected to the side of the cylinder piston (917) near the linear motor (1), and the other end of the push-pull rod (919) is connected to the air valve push-pull guide plate (65).

2. The airless point-spray nozzle mechanism as described in claim 1, characterized in that: The frame assembly (2) includes a cam shaft (21), a stop shaft (22), a guide rail (23), a fixing hole (24), and a frame (25). The fixing hole (24) is formed on the frame (25). The cam shaft (21) is installed on the upper side of the frame (25) near the frame housing (10). The stop shaft (22) is installed on the upper side of the frame (25) near the frame housing (10), and the stop shaft (22) is located above the cam shaft (21). The guide rail (23) is installed on the lower side of the side near the frame housing (10) away from the linear motor (1).

3. The airless point-spray nozzle mechanism as described in claim 1, characterized in that: The ratchet gear assembly (5) includes a ratchet (51), a gear (52) and a gear train shaft (53), one end of which is mounted in a fixing hole (24) via a bushing; The gear (52) is mounted on the outside of the gear train shaft (53); the ratchet (51) is mounted on the outside of the gear train shaft (53) and is located in front of the gear (52).

4. The airless point-spray nozzle mechanism as described in claim 1, characterized in that: The rack assembly (6) includes a rack connecting panel (61), a rack guide slider (62), a rack guide rod (63), a rack guide rod limiting slider (64), and a valve push-pull guide plate (65). The rack guide rod (63) is installed on the rack connecting panel (61) away from the linear motor (1). The rack guide rod limiting slider (64) is installed on the rack guide rod (63) away from the linear motor (1), and the rack guide rod limiting slider (64) is sleeved inside the guide rail (23). The rack guide slider (62) is installed on the rear side of the rack connecting panel (61).

5. The airless point-spray nozzle mechanism as described in claim 1, characterized in that: The slider guide plate assembly (7) includes an annular guide rail (71), a guide paddle shaft (72), a paddle torsion spring (73), and a guide paddle (74). The annular guide rail (71) is installed on the front side of the frame (25). The guide paddle shaft (72) is installed at both ends of the annular guide rail (71). The guide paddle (74) is sleeved on the outside of the guide paddle shaft (72). The paddle torsion spring (73) is sleeved on the outside of the guide paddle shaft (72), and the paddle torsion spring (73) is located inside the guide paddle (74).

6. The airless point-spray nozzle mechanism as described in claim 1, characterized in that: One end of the torsion spring (3) is in contact with the stop shaft (22); the anti-return pawl (4) is in contact with the ratchet (51).

7. The airless point-spray nozzle mechanism as described in claim 4, characterized in that: A rack is provided above the rack connecting panel (61), and the rack meshes with the gear (52); the rack guide slider (62) is located inside the annular guide rail (71), and the rack guide slider (62) moves along the annular guide rail (71); the size of the rack guide rod limiting slider (64) matches the size of the inner side of the guide rail (23).

8. The airless point spray nozzle mechanism as described in claim 1, characterized in that: The end of the nut (91) is located outside the cylinder outer cylinder (916); the end of the liquid flow channel (94) is connected to the liquid supply system through a connector; the inner cylinder one-way valve (914) is used to allow gas to flow unidirectionally from between the cylinder inner cylinder (93) and the cylinder outer cylinder (916) to the cylinder outer cylinder (916).

9. The airless point-spray nozzle mechanism as described in claim 1, characterized in that: The outer cylinder one-way valve (915) is used to allow gas to flow unidirectionally from the outside of the equipment to the inside of the cylinder outer cylinder (916); the outer side of the cylinder piston (917) is in contact with the inner wall of the cylinder outer cylinder (916); the outer side of the large sealing ring (918) is in contact with the inner wall of the cylinder outer cylinder (916).

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