An automatic spraying device for automobile body

Abstract

The present invention relates to the technical field of automobile body spraying, and specifically relates to an automatic spraying device for an automobile body, which comprises two guide rails. Electric sliding seats are slidably connected to both of the two guide rails. Lateral support frames are fixedly connected to the outer walls of the two electric sliding seats. A spraying outer frame is fixedly connected between the two lateral support frames; a self-adjusting spraying assembly, and the self-adjusting spraying assembly comprises a linear slide rail fixedly connected to the inner wall of the spraying outer frame. The present invention can dynamically adjust the array spacing of multiple fluid pump nozzles, so that the multiple fluid pump nozzles can always maintain a uniform interval when adjusting the spacing to adapt to the width of the chassis guard plate, ensuring the uniformity and consistency of spraying coverage. At the same time, it can automatically adjust the spraying area of the rectangular elastic spray pipe, can adapt to the change of the array spacing of multiple fluid pump nozzles, and can correspondingly adjust the flow rate of the paint sprayed by the fluid pump nozzles, so that the paint flow rate can automatically match the change of the chassis guard plate width, further optimizing the spraying quality.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive body spraying, and particularly relates to an automatic spraying device for an automotive body. Background Art

[0002] An automotive body is the main structure of a vehicle made of materials such as metals and alloys, and has functions such as supporting the whole vehicle and protecting the safety of passengers. Automotive body spraying is a process of applying multiple layers of coatings on the body. By spraying corresponding coatings on the surface of the body structure, it can not only protect the metal components of the body from corrosion and wear, but also enhance the surface hardness and durability, and improve the protection performance and aesthetics of the automotive body.

[0003] The chassis guard plate is an important part of the body structure of an automobile, especially a new energy vehicle. Usually, a water-based damping coating needs to be sprayed on the inner side of the chassis guard plate to absorb and attenuate the vibration generated by the chassis during vehicle driving, and improve the sound insulation and protection effects during driving. To meet the protection requirements of the chassis area, the width dimensions of the chassis guard plate are different, that is, the overall width dimensions of the chassis guard plate are inconsistent. To ensure the uniform coverage of the coating on the inner side of the chassis guard plate, the chassis guard plate usually needs to use multiple arrays of spraying nozzles for coating spraying operations. When spraying the chassis guard plate with different width dimensions, it is difficult for the spraying range and the spraying flow rate of the coating to be adjusted automatically according to the width distance change of the chassis guard plate, resulting in easy occurrence of thick coating or missed coating phenomena in the width change area of the chassis guard plate, affecting the spraying quality of the chassis guard plate. Summary of the Invention

[0004] Aiming at the above-mentioned shortcomings of the prior art, the present invention provides an automatic spraying device for an automotive body, which can effectively solve the problem that in the prior art, it is difficult for the spraying distance and the spraying flow rate to be adjusted automatically according to the width change of the chassis guard plate, resulting in easy occurrence of thick coating or missed coating phenomena in the chassis guard plate, affecting the spraying quality of the chassis guard plate.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0006] The present invention provides an automatic spraying device for an automotive body, including:

[0007] Two guide rails, on each of the two guide rails, there is a slidably connected electric slide, on the outer walls of the two electric slides, there are fixedly connected lateral support frames, and between the two lateral support frames, there is a fixedly connected spraying outer frame;

[0008] Self-adjusting spraying assembly, the self-adjusting spraying assembly includes a linear slide rail fixedly connected to the inner wall of the spraying outer frame. A central fixing block is fixedly connected to the middle of the linear slide rail. An inner slider and an outer slider are slidably connected to both sides of the central fixing block on the linear slide rail. Fluid pump nozzles are fixedly installed on the lower end faces of the central fixing block, the inner slider and the outer slider. The inner wall of the spraying outer frame is fixedly connected with a main cylinder and an auxiliary cylinder. Hydraulic oil is filled in both the main cylinder and the auxiliary cylinder. The cross-sectional area of the main cylinder is half of the cross-sectional area of the auxiliary cylinder, and a oil pipe is fixedly connected between the main cylinder and the auxiliary cylinder. Control piston plates are hermetically slidably connected to the inner walls of the main cylinder and the auxiliary cylinder. The two control piston plates in the main cylinder and the auxiliary cylinder are fixedly connected to the outer slider and the inner slider respectively through a connecting bracket. A small compression spring is fixedly connected between the control piston plate in the auxiliary cylinder and the inner wall of the auxiliary cylinder;

[0009] The outlet end of the fluid pump nozzle is rotatably connected with a flow rate self-adjusting component.

[0010] Further, the self-adjusting spraying assembly further includes an electric lifting rod fixedly installed at the lower end of the lateral support frame. A distance sensor is fixedly installed at the output end of the electric lifting rod. The distance sensor is used to monitor the width change of the chassis guard plate in real time. An electric telescopic rod and a PLC controller are fixedly installed on the outer wall of the spraying outer frame. The distance sensor, the electric telescopic rod and the PLC controller are electrically connected. The telescopic end of the electric telescopic rod is fixedly connected to the connecting bracket above the outer slider.

[0011] Further, the flow rate self-adjusting component includes an adjusting sleeve rotatably connected to the outlet end of the fluid pump nozzle. Valve plates are fixedly connected to the inner wall of the adjusting sleeve and the outlet end inner wall of the fluid pump nozzle. A number of through holes are opened on both valve plates. A rectangular diversion frame is fixedly connected to the lower position of the outer peripheral wall of the fluid pump nozzle. The lower end of the adjusting sleeve is hermetically and rotatably connected to the upper end of the rectangular diversion frame. Two symmetrically arranged shaft seats are fixedly connected to the outer wall of the rectangular diversion frame. Rotating shafts are rotatably connected to both shaft seats. Lateral flow limiting plates are fixedly connected to the outer peripheral walls of the two rotating shafts. A rectangular elastic spray pipe is fixedly connected between the two lateral flow limiting plates. The upper end of the rectangular elastic spray pipe is fixedly communicated with the lower end of the rectangular diversion frame. An adjusting control component is fixedly installed on the inner wall of the spraying outer frame. A transmission component is fixedly connected to the outer wall of the rectangular diversion frame.

[0012] Further, the adjustment and control component includes a number of servo electric push rods fixedly installed on the inner wall of the spraying outer frame. The output ends of the number of servo electric push rods are fixedly connected with a lifting plate. Vertical slide rails are fixedly connected to the outer walls of the central fixed block, the inner slider and the outer slider. A lifting block is slidably connected to the inner side of each vertical slide rail. Concave limiting plates are fixedly connected to the outer walls of the number of lifting blocks. The inner sides of the concave limiting plates are slidably matched with the lifting plate. A toothed plate bracket is fixedly connected to the lower end of each lifting block. Two toothed plates are provided on the toothed plate bracket. Transmission gears are fixedly connected to the ends of the two rotating shafts. The two transmission gears are respectively meshed with the two toothed plates on the toothed plate bracket.

[0013] Further, the adjustment and control component further includes a sliding piece fixedly connected to the inner wall of the spraying outer frame. The upper end surface of the connecting bracket located above the inner slider is fixedly connected with an adjustable resistance rod. The adjustable resistance rod is in sliding contact with the sliding piece.

[0014] Wherein, the adjustable resistance rod and the sliding piece form a sliding rheostat. The sliding rheostat is electrically connected to the PLC controller. During the process of the adjustable resistance rod moving towards the sliding piece, the resistance value of the sliding rheostat becomes larger.

[0015] Further, the transmission component includes a support plate fixedly connected to the outer wall of the rectangular diversion frame. A rotating rod is rotatably connected to the support plate. Bevel gears are fixedly connected to the lower end of the rotating rod and the outer peripheral wall of the rotating shaft. The two bevel gears are meshed with each other. A small gear is fixedly connected to the upper end of the rotating rod. A toothed ring is fixedly connected to the upper position of the outer peripheral wall of the adjusting sleeve. The toothed ring is meshed with the small gear.

[0016] Further, a strip-shaped protrusion is fixedly connected to the inner side of the concave limiting plate. A groove is formed on the outer surface of the lifting plate. The strip-shaped protrusion is slidably matched with the groove.

[0017] The technical solution provided by the present invention has the following beneficial effects compared with the known prior art:

[0018] In the present invention, a self-adjusting spraying assembly is provided. When the width of the chassis guard plate changes, the outer slider can be driven to horizontally move with the control piston plate in the main cylinder. When the control piston plate in the main cylinder moves, the amount of hydraulic oil in the main cylinder will change and pass through the oil pipe into the auxiliary cylinder or suck hydraulic oil from the auxiliary cylinder, so that the control piston plate in the auxiliary cylinder synchronously moves half of the moving distance of the control piston plate in the main cylinder. Furthermore, the moving distance of the inner slider is always half of the moving distance of the outer slider, so that the array spacing of multiple fluid pump nozzles can be dynamically adjusted. It can not only automatically adjust the spraying range when the width dimension of the chassis guard plate changes, avoid the phenomenon of too thick or missed coating after spraying, but also make the multiple fluid pump nozzles always maintain a uniform interval when adapting to the adjustment of the width range of the chassis guard plate, ensuring the uniformity and consistency of spraying coverage;

[0019] In the present invention, a flow self-adjusting assembly is provided. When the width of the chassis guard plate changes, the adjustable resistance rod can slide relative to the sliding contact of the sliding piece synchronously, so that the resistance value of the sliding rheostat composed of the adjustable resistance rod and the sliding piece changes. The telescopic operation of the output end of the servo electric push rod can be adjusted through the PLC controller and the telescopic stroke of the output end of the servo electric push rod can be controlled. Furthermore, two lateral flow limiting plates on both sides of the fluid pump nozzle are driven to swing inward or outward by a certain amplitude, so that the rectangular elastic nozzle can contract or expand outward, to automatically adjust the spraying area of the rectangular elastic nozzle, and can adapt to the change of the array spacing of multiple fluid pump nozzles, further improving the uniformity of spraying;

[0020] In the present invention, an adjusting sleeve and a valve plate are provided. When driving the two lateral flow limiting plates to swing inward or outward to automatically adjust the spraying area, the adjusting sleeve can be synchronously driven to rotate, so that the valve plate in the adjusting sleeve and the valve plate at the outlet end of the fluid pump nozzle rotate relatively, so that the communicating area of the through holes on the two valve plates changes, to correspondingly adjust the flow rate of the paint sprayed by the fluid pump nozzle, so that the paint flow rate can automatically match the change of the width of the chassis guard plate, further optimizing the spraying quality and avoiding coating defects caused by unmatched flow rates. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 is a schematic diagram of a partial structure of the spraying outer frame in the present invention;

[0024] Figure 3 It is a schematic diagram of the internal structure of the spraying outer frame in the present invention;

[0025] Figure 4 It is a cross-sectional view of the partial structure of the main cylinder and the auxiliary cylinder in the present invention;

[0026] Figure 5 It is a schematic diagram of the partial structure of the flow rate self-regulating component in the present invention;

[0027] Figure 6 It is a schematic diagram of the partial structure of the outer slider in the present invention;

[0028] Figure 7 It is a schematic diagram of the partial structure of the lifting plate in the present invention;

[0029] Figure 8 It is an exploded view of the partial structure of the flow rate self-regulating component in the present invention.

[0030] Figure 9 It is a cross-sectional view of the partial structure of the outlet end of the fluid pump nozzle and the regulating sleeve in the present invention.

[0031] Reference numerals: 1, guide rail; 2, electric sliding seat; 3, lateral support frame; 4, spraying outer frame; 5, self-adjusting spraying component; 51, linear slide rail; 52, central fixing block; 53, inner slider; 54, outer slider; 55, fluid pump nozzle; 56, main cylinder; 57, auxiliary cylinder; 58, oil pipe; 59, control piston plate; 510, connecting bracket; 511, small compression spring; 512, electric lifting rod; 513, distance sensor; 514, electric telescopic rod; 515, PLC controller; 6, flow rate self-regulating component; 61, regulating sleeve; 62, valve plate; 63, rectangular flow guiding frame; 64, shaft seat; 65, rotating shaft; 66, lateral flow limiting plate; 67, rectangular elastic spray pipe; 7, regulating control component; 71, servo electric push rod; 72, lifting plate; 73, vertical slide rail; 74, lifting block; 75, concave limiting plate; 76, tooth plate bracket; 77, driving gear; 78, sliding piece; 79, adjustable resistance rod; 8, transmission component; 81, support plate; 82, rotating rod; 83, bevel gear; 84, small gear; 85, toothed ring; 9, strip-shaped protrusion; 10, groove. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0033] The present invention will be further described below in conjunction with embodiments.

[0034] Embodiment: Refer to Figures 1 to 9 , an automatic spraying device for an automobile body, comprising:

[0035] Two guide rails 1, on both of which an electric sliding seat 2 is slidably connected. On the outer walls of the two electric sliding seats 2, a lateral support frame 3 is fixedly connected. Between the two lateral support frames 3, a spraying outer frame 4 is fixedly connected; A self-adjusting spraying assembly 5, which includes a linear slide rail 51 fixedly connected to the inner wall of the spraying outer frame 4. In the middle of the linear slide rail 51, a central fixing block 52 is fixedly connected. On both sides of the central fixing block 52 on the linear slide rail 51, an inner slider 53 and an outer slider 54 are slidably connected. On the lower end faces of the central fixing block 52, the inner slider 53 and the outer slider 54, a fluid pump nozzle 55 is fixedly installed. On the inner wall of the spraying outer frame 4, a main cylinder 56 and an auxiliary cylinder 57 are fixedly connected. The main cylinder 56 and the auxiliary cylinder 57 are both filled with hydraulic oil. The cross-sectional area of the main cylinder 56 is half of the cross-sectional area of the auxiliary cylinder 57, and a oil pipe 58 is fixedly connected between the main cylinder 56 and the auxiliary cylinder 57. On the inner walls of the main cylinder 56 and the auxiliary cylinder 57, a control piston plate 59 is hermetically slidably connected. The two control piston plates 59 in the main cylinder 56 and the auxiliary cylinder 57 are respectively fixedly connected to the outer slider 54 and the inner slider 53 through a connecting bracket 510. A small compression spring 511 is fixedly connected between the control piston plate 59 in the auxiliary cylinder 57 and the inner wall of the auxiliary cylinder 57;

[0036] Specifically, when the outer slider 54 drives the control piston plate 59 in the main cylinder 56 to move, the hydraulic oil in the main cylinder 56 enters the auxiliary cylinder 57 through the oil pipe 58 to drive the control piston plate 59 in the auxiliary cylinder 57 to move, so that the moving distance of the control piston plate 59 in the auxiliary cylinder 57 is half of the moving distance of the control piston plate 59 in the main cylinder 56;

[0037] The self-adjusting spraying assembly 5 further includes an electric lifting rod 512 fixedly installed at the lower end of the lateral support frame 3. At the output end of the electric lifting rod 512, a distance sensor 513 is fixedly installed. The distance sensor 513 is used to monitor the width change of the chassis guard plate in real time. On the outer wall of the spraying outer frame 4, an electric telescopic rod 514 and a PLC controller 515 are fixedly installed. The distance sensor 513, the electric telescopic rod 514 and the PLC controller 515 are electrically connected. The telescopic end of the electric telescopic rod 514 is fixedly connected to the connecting bracket 510 above the outer slider 54;

[0038] When the width distance of the chassis guard plate changes, the outer slider 54 and the control piston plate 59 in the main cylinder barrel 56 can move horizontally. When the control piston plate 59 in the main cylinder barrel 56 moves, the amount of hydraulic oil in the main cylinder barrel 56 will change and pass through the oil pipe 58 into the auxiliary cylinder barrel 57 or suck the hydraulic oil from the auxiliary cylinder barrel 57, so that the control piston plate 59 in the auxiliary cylinder barrel 57 synchronously moves half of the moving distance of the control piston plate 59 in the main cylinder barrel 56. Furthermore, the moving distance of the inner slider 53 is always half of the moving distance of the outer slider 54, so that the array spacing of multiple fluid pump nozzles 55 can be dynamically adjusted, ensuring that the multiple fluid pump nozzles 55 can always maintain a uniform interval when adapting to the spacing adjustment of the chassis guard plate width, and guaranteeing the uniformity and consistency of the spraying coverage.

[0039] A flow rate self-adjusting component 6 is rotatably connected to the outlet end of the fluid pump nozzle 55. The flow rate self-adjusting component 6 includes an adjusting sleeve 61 rotatably connected to the outlet end of the fluid pump nozzle 55. Valve plates 62 are fixedly connected to the inner wall of the adjusting sleeve 61 and the inner wall of the outlet end of the fluid pump nozzle 55 respectively. A number of through holes are formed in both valve plates 62.

[0040] Specifically, the through holes on the two valve plates 62 are staggered. When the adjusting sleeve 61 rotates a certain angle relative to the fluid pump nozzle 55, the overlapping area of the through holes on the two valve plates 62 changes, thereby adjusting the coating flow rate of the fluid pump nozzle 55.

[0041] A rectangular diversion frame 63 is fixedly connected to the lower position of the outer peripheral wall of the fluid pump nozzle 55. The lower end of the adjusting sleeve 61 is sealingly and rotatably connected to the upper end of the rectangular diversion frame 63. Two symmetrically arranged shaft seats 64 are fixedly connected to the outer wall of the rectangular diversion frame 63. Rotating shafts 65 are rotatably connected to both shaft seats 64. Lateral flow limiting plates 66 are fixedly connected to the outer peripheral walls of the two rotating shafts 65. A rectangular elastic spray pipe 67 is fixedly connected between the two lateral flow limiting plates 66. The upper end of the rectangular elastic spray pipe 67 is fixedly communicated with the lower end of the rectangular diversion frame 63.

[0042] Specifically, the rectangular elastic spray pipe 67 is made of vulcanized polyurethane elastomer material, with high wear resistance, high tensile strength and high elastic recovery performance, and can maintain long-term use under dynamic high load. The opening at the bottom of the rectangular elastic spray pipe 67 is smaller in the initial state. Therefore, when the lateral flow limiting plates 66 expand or contract, the rectangular elastic spray pipe 67 can have a strong tendency to recover to its initial state under its own elastic force, and will not cause the middle position of the rectangular elastic spray pipe 67 to expand outward during the inward swing of the two lateral flow limiting plates 66, so as to ensure the flow rate adjustment of the rectangular elastic spray pipe 67 for the coating. At the same time, due to the high tensile strength and elastic recovery performance of the rectangular elastic spray pipe 67, and it can maintain long-term use under high load conditions, the rectangular elastic spray pipe 67 will not have a reduced elastic recovery ability after long-term use.

[0043] An adjustment and control component 7 is fixedly installed on the inner wall of the spraying outer frame 4. The adjustment and control component 7 includes a number of servo electric push rods 71 fixedly installed on the inner wall of the spraying outer frame 4. The output ends of the number of servo electric push rods 71 are fixedly connected with a lifting plate 72. Vertical slide rails 73 are fixedly connected to the outer walls of the central fixed block 52, the inner slider 53 and the outer slider 54. A lifting block 74 is slidably connected to the inner side of each vertical slide rail 73. Concave limiting plates 75 are fixedly connected to the outer walls of the number of lifting blocks 74. The inner sides of the concave limiting plates 75 are slidably matched with the lifting plate 72. A strip-shaped protrusion 9 is fixedly connected to the inner side of the concave limiting plate 75. A groove 10 is formed on the outer surface of the lifting plate 72. The strip-shaped protrusion 9 is slidably matched with the groove 10. A toothed plate bracket 76 is fixedly connected to the lower end of each lifting block 74. Two toothed plates are provided on the toothed plate bracket 76. Transmission gears 77 are fixedly connected to the ends of the two rotating shafts 65. The two transmission gears 77 are respectively meshed with the two toothed plates on the toothed plate bracket 76. The adjustment and control component 7 further includes a sliding piece 78 fixedly connected to the inner wall of the spraying outer frame 4. An adjustable resistance rod 79 is fixedly connected to the upper end surface of the connecting bracket 510 located above the inner slider 53. The adjustable resistance rod 79 is in contact sliding fit with the sliding piece 78. Among them, the adjustable resistance rod 79 and the sliding piece 78 form a sliding rheostat. The sliding rheostat is electrically connected to the PLC controller 515. During the process of the adjustable resistance rod 79 moving towards the sliding piece 78, the resistance value of the sliding rheostat becomes larger;

[0044] Specifically, the PLC controller 515 outputs corresponding PWM signals to the servo electric push rod 71 by monitoring the change of the resistance value of the sliding rheostat, so as to control the telescopic movement of the output end of the servo electric push rod 71 and control the telescopic stroke of the output end of the servo electric push rod 71;

[0045] When the width distance of the chassis guard plate changes, the adjustable resistance rod 79 will synchronously contact and slide relative to the sliding piece 78, causing the resistance value of the sliding rheostat formed by the adjustable resistance rod 79 and the sliding piece 78 to change. The PLC controller 515 can control the extension or retraction operation of the servo electric push rod 71, and then drive the two lateral current limiting plates 66 on both sides of the fluid pump nozzle 55 to swing inward or outward by a certain amplitude, so that the rectangular elastic spray pipe 67 can contract or expand, so as to automatically adjust the spraying area of the rectangular elastic spray pipe 67 and adapt to the change of the array spacing of multiple fluid pump nozzles 55.

[0046] A transmission component 8 is fixedly connected to the outer wall of the rectangular diversion frame 63. The transmission component 8 includes a support plate 81 fixedly connected to the outer wall of the rectangular diversion frame 63. A rotating rod 82 is rotatably connected to the support plate 81. Conical gears 83 are fixedly connected to the lower end of the rotating rod 82 and the outer peripheral wall of the rotating shaft 65 respectively. The two conical gears 83 mesh with each other. A small gear 84 is fixedly connected to the upper end of the rotating rod 82. A tooth ring 85 is fixedly connected to the upper position of the outer peripheral wall of the adjusting sleeve 61. The tooth ring 85 meshes with the small gear 84;

[0047] When the two lateral flow-limiting plates 66 swing inward or outward to automatically adjust the spraying area, the adjusting sleeve 61 can be synchronously driven to rotate, so that the valve plate 62 in the adjusting sleeve 61 and the valve plate 62 at the outlet end of the fluid pump nozzle 55 rotate relatively, so that the communicating area of the through holes on the two valve plates 62 changes, so as to correspondingly adjust the flow rate of the paint sprayed by the fluid pump nozzle 55, so that the paint flow rate can automatically match the change in the width of the chassis guard plate, further optimizing the spraying quality and avoiding coating defects caused by unmatched flow rates.

[0048] The working principle of the present invention is as follows:

[0049] Fix the chassis guard plate at an appropriate height directly below the spraying outer frame 4. Drive the spraying outer frame 4 to move by controlling the two electric sliders 2 to move horizontally relative to the two guide rails 1 respectively. When the spraying outer frame 4 moves relative to the chassis guard plate, the distance sensor 513 can be driven to move synchronously. Use the distance sensor 513 to monitor the distance between it and the side of the chassis guard plate in real time. When the width of the chassis guard plate changes, it means that the monitoring distance between the distance sensor 513 and the side of the chassis changes;

[0050] When the width of the chassis guard plate changes, the distance monitored by the distance sensor 513 from its side edge to the chassis guard plate changes. At this time, the PLC controller 515 can convert the distance signal monitored by the distance sensor 513 into an electrical signal and transmit it to the electric telescopic rod 514, so that the electric telescopic rod 514 can drive the connection bracket 510 above the outer slider 54 to move. Furthermore, the outer slider 54 and the control piston plate 59 in the main cylinder 56 move horizontally. During the movement of the control piston plate 59 in the main cylinder 56, the amount of hydraulic oil in the main cylinder 56 will change and pass through the oil pipe 58 into the auxiliary cylinder 57 or suck the hydraulic oil from the auxiliary cylinder 57. According to Pascal's law, the incompressible liquid in a closed container can transmit pressure equally, so that the control piston plate 59 in the auxiliary cylinder 57 can move synchronously. Since the cross-sectional area of the main cylinder 56 is half of the cross-sectional area of the auxiliary cylinder 57, the moving distance of the control piston plate 59 in the auxiliary cylinder 57 is half of the moving distance of the control piston plate 59 in the main cylinder 56. And when the control piston plate 59 in the auxiliary cylinder 57 moves, it can drive the inner slider 53 to move synchronously. Therefore, the moving distance of the inner slider 53 is always half of the moving distance of the outer slider 54, so that the multiple fluid pump nozzles 55 can always maintain a uniform interval when adjusting the spacing to adapt to the width of the chassis guard plate;

[0051] When the connection bracket 510 above the inner slider 53 moves due to the change in the width of the chassis guard plate, the adjustable resistance rod 79 can contact and slide relative to the sliding piece 78 synchronously, causing the resistance value of the sliding rheostat composed of the adjustable resistance rod 79 and the sliding piece 78 to change. At this time, the PLC controller 515 can detect the resistance change and the degree of resistance change generated by the sliding rheostat, and control the relay through the digital quantity output module to switch the power supply phase sequence of the motor in the servo electric push rod 71, adjust the extension or retraction operation of the servo electric push rod 71 and control the extension or retraction operation length of the servo electric push rod 71. Furthermore, it can drive the lifting plate 72 to rise or fall by a corresponding distance. At the same time, when the lifting plate 72 moves up and down, the two tooth plate brackets 76 on the tooth plate bracket 76 and the two transmission gears 77 can be used to drive the two rotating shafts 65 to rotate in opposite directions, so that the two lateral flow limiting plates 66 on both sides of the fluid pump nozzle 55 swing inward or outward by a certain amplitude, enabling the rectangular elastic nozzle 67 to contract or expand outward, so as to automatically adjust the spraying area of the rectangular elastic nozzle 67;

[0052] When the two lateral flow limiting plates 66 swing inward or outward, that is, when the two rotating shafts 65 rotate, the meshing of the two bevel gears 83 can be used to drive the rotating rod 82 to rotate, and the rotating rod 82 drives the adjusting sleeve 61 to rotate through the meshing transmission between the small gear 84 at the upper end of the rotating rod 82 and the toothed ring 85, so that the valve plate 62 in the adjusting sleeve 61 rotates relative to the valve plate 62 at the outlet end of the fluid pump nozzle 55. When the width of the chassis guard plate becomes smaller, the overlapping area of the through holes on the two valve plates 62 can be increased, that is, the communicating area of the through holes is decreased, so as to limit the coating flow rate. When the width of the chassis guard plate becomes larger, the communicating area of the through holes can be increased.

[0053] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic spraying device for an automobile body, characterized in that, Including: Two guide rails (1), on each of the two guide rails (1), an electric sliding seat (2) is slidably connected, on the outer walls of the two electric sliding seats (2), a lateral support frame (3) is fixedly connected, and between the two lateral support frames (3), a spraying outer frame (4) is fixedly connected; A self-adjusting spraying assembly (5), the self-adjusting spraying assembly (5) includes a linear slide rail (51) fixedly connected to the inner wall of the spraying outer frame (4), a central fixing block (52) is fixedly connected to the middle of the linear slide rail (51), on the linear slide rail (51) on both sides of the central fixing block (52), an inner slider (53) and an outer slider (54) are slidably connected, fluid pump nozzles (55) are fixedly installed on the lower end faces of the central fixing block (52), the inner slider (53) and the outer slider (54), a main cylinder (56) and an auxiliary cylinder (57) are fixedly connected to the inner wall of the spraying outer frame (4), hydraulic oil is filled in both the main cylinder (56) and the auxiliary cylinder (57), the cross-sectional area of the main cylinder (56) is half of the cross-sectional area of the auxiliary cylinder (57), and a pipeline (58) is fixedly connected and communicated between the main cylinder (56) and the auxiliary cylinder (57), control piston plates (59) are hermetically slidably connected to the inner walls of the main cylinder (56) and the auxiliary cylinder (57), the two control piston plates (59) in the main cylinder (56) and the auxiliary cylinder (57) are fixedly connected to the outer slider (54) and the inner slider (53) respectively through a connecting bracket (510), and a small compression spring (511) is fixedly connected between the control piston plate (59) in the auxiliary cylinder (57) and the inner wall of the auxiliary cylinder (57); The outlet end of the fluid pump nozzle (55) is rotatably connected with a flow rate self-adjusting assembly (6); The flow rate self-adjusting assembly (6) includes an adjusting sleeve (61) rotatably connected to the outlet end of the fluid pump nozzle (55), valve plates (62) are fixedly connected to the inner wall of the adjusting sleeve (61) and the inner wall of the outlet end of the fluid pump nozzle (55), a plurality of through holes are formed in both the two valve plates (62), a rectangular diversion frame (63) is fixedly connected to the lower position of the outer peripheral wall of the fluid pump nozzle (55), the lower end of the adjusting sleeve (61) is hermetically and rotatably connected to the upper end of the rectangular diversion frame (63), two symmetrically arranged shaft seats (64) are fixedly connected to the outer wall of the rectangular diversion frame (63), rotating shafts (65) are rotatably connected to both the two shaft seats (64), lateral flow limiting plates (66) are fixedly connected to the outer peripheral walls of the two rotating shafts (65), a rectangular elastic spray pipe (67) is fixedly connected between the two lateral flow limiting plates (66), the upper end of the rectangular elastic spray pipe (67) is fixedly communicated with the lower end of the rectangular diversion frame (63), an adjusting control component (7) is fixedly installed on the inner wall of the spraying outer frame (4), and a transmission component (8) is fixedly connected to the outer wall of the rectangular diversion frame (63).

2. The automatic spraying device for an automobile body according to claim 1, characterized in that, The self-adjusting spraying assembly (5) further includes an electric lifting rod (512) fixedly installed at the lower end of the lateral support frame (3). The output end of the electric lifting rod (512) is fixedly installed with a distance sensor (513), and the distance sensor (513) is used to monitor the width change of the chassis guard plate in real time. An electric telescopic rod (514) and a PLC controller (515) are fixedly installed on the outer wall of the spraying outer frame (4). The distance sensor (513), the electric telescopic rod (514), and the PLC controller (515) are electrically connected. The telescopic end of the electric telescopic rod (514) is fixedly connected to a connecting bracket (510) above the outer slider (54).

3. The automatic spraying device for an automobile body according to claim 2, wherein, The adjustment control component (7) includes a number of servo electric push rods (71) fixedly installed on the inner wall of the spraying outer frame (4). The output ends of the number of servo electric push rods (71) are fixedly connected to a lifting plate (72). Vertical slide rails (73) are fixedly connected to the outer walls of the central fixed block (52), the inner slider (53), and the outer slider (54). A lifting block (74) is slidably connected to the inner side of each vertical slide rail (73). Concave limiting plates (75) are fixedly connected to the outer walls of the number of lifting blocks (74). The inner sides of the concave limiting plates (75) are slidably matched with the lifting plate (72). A toothed plate bracket (76) is fixedly connected to the lower end of each lifting block (74). Two toothed plates are provided on the toothed plate bracket (76). Transmission gears (77) are fixedly connected to the ends of the two rotating shafts (65). The two transmission gears (77) are respectively meshed with the two toothed plates on the toothed plate bracket (76).

4. An automatic spraying device for an automobile body according to claim 3, characterized in that, The adjustment control component (7) further includes a sliding piece (78) fixedly connected to the inner wall of the spraying outer frame (4). The upper end face of the connecting bracket (510) located above the inner slider (53) is fixedly connected with an adjustable resistance rod (79). The adjustable resistance rod (79) is in contact and sliding fit with the sliding piece (78). Among them, the adjustable resistance rod (79) and the sliding piece (78) form a sliding rheostat. The sliding rheostat is electrically connected to the PLC controller (515). During the process of the adjustable resistance rod (79) moving towards the sliding piece (78), the resistance value of the sliding rheostat becomes larger.

5. An automatic spraying device for an automobile body according to claim 1, characterized in that, The transmission component (8) includes a support plate (81) fixedly connected to the outer wall of the rectangular diversion frame (63). A rotating rod (82) is rotatably connected to the support plate (81). Bevel gears (83) are fixedly connected to the lower end of the rotating rod (82) and the outer peripheral wall of the rotating shaft (65). The two bevel gears (83) are meshed with each other. A small gear (84) is fixedly connected to the upper end of the rotating rod (82). A toothed ring (85) is fixedly connected to the upper position of the outer peripheral wall of the adjusting sleeve (61). The toothed ring (85) is meshed with the small gear (84).

6. An automatic spraying device for an automobile body according to claim 3, characterized in that, A strip-shaped protrusion (9) is fixedly connected to the inner side of the concave limiting plate (75). A groove (10) is formed on the outer surface of the lifting plate (72). The strip-shaped protrusion (9) is in sliding fit with the groove (10).

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