A spray gun limiting mechanism and an automatic spray painting robot

Abstract

The utility model relates to spray gun limiting technical field, concretely relates to a spray gun limiting mechanism and automatic spraying robot, install on spraying robot body, the front end transverse of spraying robot body is provided with track, including the first adjustable ball swing lever type proximity switch and second adjustable ball swing lever type proximity switch of installation in track both ends, be provided with the spray gun assembly that can reciprocate along the track length direction on the track, the spray gun assembly includes the support piece of sliding setting on the track, the spray gun assembly still includes the spray gun body for spraying paint and is set up on the support piece, and the spray gun body is provided with the solenoid valve that can control paint and flow into the spray gun body. The utility model adopts adjustable ball swing lever type proximity switch, through the switch of contact plate and adjustable ball swing lever type proximity switch contact control solenoid valve, solves the problem of paint sagging, avoids the overlapping position paint film of spraying edge and is too thick.

Description

Technical Field

[0001] This utility model relates to the field of spray gun limiting technology, specifically an automatic spraying robot. Background Technology

[0002] As the global manufacturing industry transforms and upgrades towards intelligence and automation, painting robots, as a key branch of the industrial robot field, undertake the core tasks of improving production efficiency and ensuring operational safety in industries such as automobile manufacturing, 3C electronics, and furniture and building materials.

[0003] Existing painting robots typically use a drive mechanism to move the nozzle back and forth along a track to paint the product. When the nozzle reaches either end of the track, it contacts a limit switch, which sends a stop signal to the robot's control system, thus stopping the nozzle. However, limit switches are generally pin-type, with a spring mounted on the pin. This pin-type structure is prone to wobbling during high-speed movement of the slide, and the spring's lifespan is relatively short due to deformation. Furthermore, the limit switch is easily damaged when the nozzle impacts it at high speed, and the sudden stop of the nozzle can cause paint dripping. The pin-type design's ability to simulate wobbling to remove dripping is unstable and ineffective, and it can also cause paint clogging, resulting in low painting efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a spray gun limiting mechanism and an automatic spraying robot, which eliminates the mechanical ejector pin type limiting of the spray gun and adopts an adjustable ball-bearing rocker type proximity switch. The solenoid valve is controlled by the contact plate and the adjustable ball-bearing rocker type proximity switch, which solves the problem of paint dripping and avoids excessive paint film at the overlapping position of the spraying edge.

[0005] To address the problems of existing technologies, this utility model provides a spray gun limiting mechanism, installed on the body of a spraying robot. The front end of the spraying robot body has a horizontally arranged track, including a first adjustable ball-bearing rocker type proximity switch and a second adjustable ball-bearing rocker type proximity switch installed at both ends of the track. A spray gun assembly capable of reciprocating along the track's length is arranged on the track. The spray gun assembly includes a support member slidably mounted on the track, and a spray gun body mounted on the support member for spraying paint. The spray gun body is equipped with a solenoid valve capable of controlling the flow of paint into the spray gun body. A contact plate is also horizontally arranged on the support member. When the contact plate moves and contacts the first and second adjustable ball-bearing rocker type proximity switches, the solenoid valve closes. When the contact plate separates from the first and second adjustable ball-bearing rocker type proximity switches, the solenoid valve opens, and paint is sprayed from the spray gun body.

[0006] Preferably, both ends of the contact plate are curved upwards.

[0007] Preferably, the first adjustable ball-bearing rocker type proximity switch has a first roller rotatably mounted on the rocker arm, and the second adjustable ball-bearing rocker type proximity switch has a second roller rotatably mounted on the rocker arm.

[0008] Preferably, the spray gun assembly further includes a protective cover fixed to the bottom of the support member, and the support member extends into the protective cover. The spraying robot body is also equipped with a purification device that can absorb paint mist in the protective cover.

[0009] Preferably, the protective cover is a truncated pyramid, the size of the top of the protective cover is smaller than the size of the bottom of the protective cover, and the interior of the protective cover is hollow.

[0010] Preferably, the track is further provided with a drive mechanism for driving the spray gun assembly to reciprocate along the length of the track.

[0011] Preferably, the purification device includes a purifier fixed to the top of the spraying robot body, the left and right sides of the purifier being connected to the protective cover via pipes, and the purification device also includes a negative pressure fan installed on the spraying robot body and connected to the purifier.

[0012] An automated painting robot, including the spray gun limiting mechanism described in the above solution.

[0013] The advantages of this utility model compared to the prior art are:

[0014] This application installs a first adjustable ball-bearing rocker type proximity switch and a second adjustable ball-bearing rocker type proximity switch at both ends of the track. The ends of the first and second adjustable ball-bearing rocker type proximity switches are respectively equipped with a first roller and a second roller to reduce frictional resistance during mechanical contact and improve dynamic response stability. A contact plate is integrated into the support of the spray gun assembly. The contact plate adopts an arc-shaped transition structure design, with both ends curving upwards to form a sloping contact surface and a horizontal trigger section in the middle. When the spray gun assembly reciprocates along the track, the contact plate makes progressive contact with the first roller or the second roller. The contact process is divided into two stages:

[0015] First stage: The raised end of the contact plate first contacts the first roller or the second roller. The vertical impact force is decomposed into a tangential component along the contact surface through the ramp structure, avoiding rigid collision and causing damage to the first and second adjustable ball rocker type proximity switches.

[0016] Second stage: As the spray gun assembly continues to move, the horizontal section of the contact plate comes into full contact with the first or second roller.

[0017] Through a two-stage contact process, the control signal is gradually applied, causing the solenoid valve to close slowly. This achieves a smooth transition at the end of the spray trajectory, eliminating abrupt changes in paint film thickness caused by traditional mechanical limits. The spray gun body allows for a certain stroke for spraying, enabling overlapping spraying during the next coat to ensure consistent paint film thickness and avoid paint sagging. Attached Figure Description

[0018] Figure 1 This is a first three-dimensional structural diagram of a spray gun limiting mechanism and an automatic spraying robot according to the present invention.

[0019] Figure 2 This is a second three-dimensional structural diagram of a spray gun limiting mechanism and an automatic spraying robot according to this utility model.

[0020] Figure 3 This is a schematic diagram of the third three-dimensional structure of a spray gun limiting mechanism and an automatic spraying robot according to this utility model.

[0021] Figure 4 This is a first three-dimensional structural diagram of the spray gun limiting mechanism and the removal and purification device of the automatic spraying robot of this utility model.

[0022] Figure 5 This is a schematic diagram of the second three-dimensional structure of the spray gun limiting mechanism and the removal and purification device of the automatic spraying robot of this utility model.

[0023] Figure 6 This is the circuit diagram of the spray gun limiting mechanism of this utility model.

[0024] The following are the labels in the diagram: 1. Spraying robot body; 11. Track; 111. First adjustable ball-bearing rocker type proximity switch; 1111. First roller; 112. Second adjustable ball-bearing rocker type proximity switch; 1121. Second roller; 12. Drive mechanism; 13. Spray gun assembly; 131. Support component; 132. Spray gun body; 1321. Solenoid valve; 133. Protective cover; 134. Contact plate; 14. Purifier; 15. Negative pressure fan. Detailed Implementation

[0025] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0026] Reference Figures 1-6As shown, this utility model provides a spray gun limiting mechanism, which is installed on the body 1 of a spraying robot. A track 11 is laterally arranged at the front end of the spraying robot body 1. The track 11 includes a first adjustable ball-bearing rocker type proximity switch 111 and a second adjustable ball-bearing rocker type proximity switch 112 installed at both ends of the track 11. A spray gun assembly 13 is arranged on the track 11 and can reciprocate along the length of the track 11. The spray gun assembly 13 includes a support member 131 slidably arranged on the track 11 and a spray gun body for spraying paint, which is arranged on the support member 131. 132, and the spray gun body 132 is equipped with a solenoid valve 1321 that controls the flow of paint into the spray gun body 132. A contact plate 134 is also laterally arranged on the support member 131. When the contact plate 134 moves to contact the first adjustable ball-bearing rocker type proximity switch 111 and the second adjustable ball-bearing rocker type proximity switch 112, the solenoid valve 1321 closes. When the contact plate 134 separates from the first adjustable ball-bearing rocker type proximity switch 111 and the second adjustable ball-bearing rocker type proximity switch 112, the solenoid valve 1321 opens, and paint is sprayed out from the spray gun body 132. Both ends of the contact plate 134 are curved upwards. A first roller 1111 is rotatably mounted on the rocker arm of the first adjustable ball-bearing rocker type proximity switch 111, and a second roller 1121 is rotatably mounted on the rocker arm of the second adjustable ball-bearing rocker type proximity switch 112.

[0027] When the painting robot body 1 is spraying paint, the control system of the painting robot body 1 (the control system is existing technology and is not shown in the figure) sends an opening command to the solenoid valve 1321. The paint enters the spray gun body 132 through the feeding system (not shown in the figure, which is existing technology). The feeding system consists of a paint tank, pipes, and a pump. The pump draws the paint from the paint tank into the spray gun body 132, forming atomized particles that are sprayed out. The spray gun assembly 13 moves in a uniform linear motion along the track 11. When the spray gun assembly 13 approaches the end of the track 11, the raised end of the contact plate 134 first contacts the first roller 1111 (or the second roller 1121) of the first adjustable ball-bearing rocker type proximity switch 111 (or the second adjustable ball-bearing rocker type proximity switch 112). The first adjustable ball-bearing rocker type proximity switch 111 or the second adjustable ball-bearing rocker type proximity switch 112 contacts the control system. After receiving the trigger signal, the control system sends a closing command to the solenoid valve 1321 to cut off the paint supply. Due to the length design of the contact plate 134, the spray gun body 132 can continue spraying a certain distance after triggering. This stroke forms an overlapping area between adjacent spray trajectories, ensuring uniform coating thickness. When the spray gun assembly 13 moves in the reverse direction, the contact plate 134 separates from either the first adjustable ball-bearing rocker type proximity switch 111 or the second adjustable ball-bearing rocker type proximity switch 112, the solenoid valve 1321 reopens, and the spraying operation resumes. Through reciprocating cyclical motion, full coverage spraying of the workpiece surface is achieved.

[0028] The spray gun assembly 13 also includes a protective cover 133 fixed to the bottom of the support member 131, and the support member 131 extends into the protective cover 133. The spraying robot body 1 is also equipped with a purification device that can absorb paint mist in the protective cover 133. The protective cover 133 is a truncated pyramid, the size of the top of the protective cover 133 is smaller than the size of the bottom of the protective cover 133, and the interior of the protective cover 133 is hollow.

[0029] The track 11 is also provided with a drive mechanism 12 for driving the spray gun assembly 13 to reciprocate along the length of the track 11. The drive mechanism 12 can be a structure of a motor, belt and pulley, or a structure of motor screw drive, as long as it can enable the spray gun assembly 13 to reciprocate along the length of the track 11.

[0030] The purification device includes a purifier 14 fixed to the top of the spraying robot body 1. The left and right sides of the purifier 14 are connected to the protective cover 133 through pipes. The purification device also includes a negative pressure fan 15 installed on the spraying robot body 1 and connected to the purifier 14. The purifier 14 may contain activated carbon to adsorb paint mist, or it may contain multiple layers of filter, such as polypropylene (PP), polyethylene terephthalate (PET), or high-efficiency glass fiber filter elements.

[0031] Paint mist generated during the spraying process is confined within the protective cover 133. The negative pressure fan 15 is activated, creating negative pressure within the protective cover 133 and forcing the paint mist through the pipes into the purifier 14. In the purifier 14, the paint mist passes sequentially through primary, medium, and high-efficiency filters, with particulate matter being intercepted at each stage. If a catalytic oxidation module is configured, VOCs are decomposed into harmless substances. The purified gas is then discharged through the negative pressure fan 15, which can be either a centrifugal fan or an axial fan to generate continuous negative pressure.

[0032] An automated painting robot, including the spray gun limiting mechanism in the above solution.

[0033] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A spray gun limiting mechanism, installed on a spraying robot body (1), wherein a track (11) is laterally arranged at the front end of the spraying robot body (1), characterized in that: The system includes a first adjustable ball-bearing rocker type proximity switch (111) and a second adjustable ball-bearing rocker type proximity switch (112) installed at both ends of a track (11). A spray gun assembly (13) capable of reciprocating along the length of the track (11) is provided on the track (11). The spray gun assembly (13) includes a support member (131) slidably mounted on the track (11). The spray gun assembly (13) also includes a spray gun body (132) mounted on the support member (131) for spraying paint. The spray gun body (132) is equipped with a mechanism to control the flow of paint into the track. The solenoid valve (1321) in the spray gun body (132) is provided with a contact plate (134) arranged laterally on the support member (131). When the contact plate (134) moves to contact the first adjustable ball rocker type proximity switch (111) and the second adjustable ball rocker type proximity switch (112), the solenoid valve (1321) can be closed. When the contact plate (134) separates from the first adjustable ball rocker type proximity switch (111) and the second adjustable ball rocker type proximity switch (112), the solenoid valve (1321) opens and the paint is sprayed out from the spray gun body (132).

2. The spray gun limiting mechanism according to claim 1, characterized in that: The two ends of the contact plate (134) are curved upwards.

3. The spray gun limiting mechanism according to claim 1, characterized in that: The first adjustable ball-bearing rocker type proximity switch (111) has a first roller (1111) rotatably mounted on the rocker arm, and the second adjustable ball-bearing rocker type proximity switch (112) has a second roller (1121) rotatably mounted on the rocker arm.

4. The spray gun limiting mechanism according to claim 1, characterized in that: The spray gun assembly (13) also includes a protective cover (133) fixed to the bottom of the support (131), and the support (131) extends into the protective cover (133). The spraying robot body (1) is also equipped with a purification device that can absorb paint mist in the protective cover (133).

5. A spray gun limiting mechanism according to claim 4, characterized in that: The protective cover (133) is a quadrangular frustum. The size of the top of the protective cover (133) is smaller than the size of the bottom of the protective cover (133), and the interior of the protective cover (133) is hollow.

6. The spray gun limiting mechanism according to claim 1, characterized in that: The track (11) is also provided with a drive mechanism (12) for driving the spray gun assembly (13) to reciprocate along the length of the track (11).

7. A spray gun limiting mechanism according to claim 4, characterized in that: The purification device includes a purifier (14) fixed on the top of the spraying robot body (1). The left and right sides of the purifier (14) are connected to the protective cover (133) through pipes. The purification device also includes a negative pressure fan (15) installed on the spraying robot body (1) and connected to the purifier (14).

8. An automatic spraying robot, including the spray gun limiting mechanism as described in any one of claims 1-7.

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