Automatic spraying device for automobile body

Abstract

The invention relates to the technical field of automobile body spraying, in particular to an automobile body automatic spraying device which comprises two guide rails, electric sliding seats are slidably connected to the two guide rails, lateral supporting frames are fixedly connected to the outer walls of the two electric sliding seats, and a spraying outer frame is fixedly connected between the two lateral supporting frames; and the distance self-adjusting spraying assembly comprises a linear sliding rail fixedly connected to the inner wall of the spraying outer frame. The array spacing of a plurality of fluid pump nozzles can be dynamically adjusted, so that the plurality of fluid pump nozzles can always keep uniform spacing when adapting to the spacing adjustment of the width of the chassis guard plate, the uniformity and consistency of spraying coverage are ensured, meanwhile, the spraying area of the rectangular elastic spray pipe is automatically adjusted, and the spraying efficiency is improved. The device can adapt to the change of the array spacing of a plurality of fluid pump sprayers, and can correspondingly adjust the flow of the coating sprayed by the fluid pump sprayers, so that the flow of the coating can be automatically matched with the width change of the chassis guard plate, and the spraying quality is further optimized.

Description

Technical Field

[0001] The invention relates to the technical field of automobile body spraying, and in particular to an automatic automobile body spraying device. Background Art

[0002] The car body is the main structure of the vehicle made of metal, alloy and other materials. It has the functions of supporting the whole vehicle and protecting the safety of passengers. Car body spraying is the process of applying multiple layers of paint on the car body. By spraying the corresponding paint on the surface of the car body structure, it can not only protect the metal parts of the car body from corrosion and wear, but also enhance the surface hardness and durability, thereby improving the protective performance and aesthetics of the car body.

[0003] The chassis guard plate is an important component of the body structure of automobiles, especially new energy vehicles. The inner side of the chassis guard plate usually needs to be sprayed with water-based damping paint to absorb and attenuate the vibration generated by the chassis during vehicle driving, and improve the sound insulation and protection effect of driving. In order to meet the protection needs 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. In order to ensure the uniform coverage of the paint on the inner side of the chassis guard plate, the chassis guard plate usually needs to use multiple arrays of spray nozzles for spraying the paint. When spraying chassis guard plates with different width dimensions, the spraying range and the spraying flow rate of the paint are difficult to adjust themselves according to the width change of the chassis guard plate, which makes the width change area of ​​the chassis guard plate prone to thick coating or missing coating after spraying, affecting the spraying quality of the chassis guard plate. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides an automatic spraying device for automobile body, which can effectively solve the problem in the prior art that the spraying spacing and spraying flow rate are difficult to adjust automatically according to the width change of the chassis guard plate, which makes the chassis guard plate prone to thick coating or missing coating, affecting the spraying quality of the chassis guard plate.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides an automatic spraying device for automobile body, comprising: Two guide rails, both guide rails are slidably connected with electric slide seats, both outer walls of the electric slide seats are fixedly connected with lateral support frames, and a spraying outer frame is fixedly connected between the two lateral support frames; The self-adjusting distance spraying assembly comprises a linear slide rail fixedly connected to the inner wall of the spraying outer frame, a center fixed block is fixedly connected to the middle of the linear slide rail, an inner slider and an outer slider are slidably connected on both sides of the center fixed block on the linear slide rail, and a fluid pump nozzle is fixedly installed on the lower end surfaces of the center fixed block, the inner slider and the outer slider, and the inner wall of the spraying outer frame is fixedly connected to the main cylinder and the auxiliary cylinder, and the main cylinder and the auxiliary cylinder are filled with hydraulic oil, the cross-sectional area of ​​the main cylinder is half of the cross-sectional area of ​​the auxiliary cylinder, and the main cylinder and the auxiliary cylinder are fixedly connected with an oil pipe, and the inner walls of the main cylinder and the auxiliary cylinder are sealed and slidably connected with a control piston plate, and the two control piston plates in the main cylinder and the auxiliary cylinder are respectively fixedly connected to the outer slider and the inner slider through a connecting bracket, and a small compression spring is fixedly connected between the control piston plate in the auxiliary cylinder and the inner wall of the auxiliary cylinder; The outlet end of the fluid pump nozzle is rotatably connected with a flow self-regulating component.

[0006] Furthermore, the self-adjusting distance spraying assembly also includes an electric lifting rod fixedly mounted on the lower end of the lateral support frame, a distance sensor is fixedly mounted on the output end of the electric lifting rod, and 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 mounted on the outer wall of the spray frame, the distance sensor, the electric telescopic rod and the PLC controller are electrically connected, and the telescopic end of the electric telescopic rod is fixedly connected to the connecting bracket above the outer slider.

[0007] Furthermore, the flow self-regulating component includes an adjusting sleeve rotatably connected to the outlet end of the fluid pump nozzle, the inner walls of the adjusting sleeve and the inner walls of the outlet end of the fluid pump nozzle are fixedly connected with valve plates, a number of through holes are opened on the two valve plates, a rectangular guide 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 sealed and rotatably connected to the upper end of the rectangular guide frame, the outer wall of the rectangular guide frame is fixedly connected to two symmetrically arranged shaft seats, the two shaft seats are rotatably connected with rotating shafts, the outer peripheral walls of the two rotating shafts are fixedly connected with lateral flow limiting plates, a rectangular elastic nozzle is fixedly connected between the two lateral flow limiting plates, the upper end of the rectangular elastic nozzle is fixedly connected to the lower end of the rectangular guide frame, an adjusting control component is fixedly installed on the inner wall of the spray outer frame, and a transmission component is fixedly connected to the outer wall of the rectangular guide frame.

[0008] Furthermore, the adjustment and control component includes a plurality of servo electric push rods fixedly mounted on the inner wall of the spray outer frame, the output ends of the plurality of servo electric push rods are fixedly connected to a lifting plate, the outer walls of the central fixed block, the inner slider and the outer slider are fixedly connected to a vertical slide rail, the inner side of each vertical slide rail is slidably connected to a lifting block, the outer walls of the plurality of lifting blocks are fixedly connected to a concave limiting plate, the inner side of the concave limiting plate is slidably matched with the lifting plate, the lower end of each lifting block is fixedly connected to a toothed plate bracket, the toothed plate bracket is provided with two toothed plates, the two ends of the rotating shafts are fixedly connected to transmission gears, and the two transmission gears are respectively meshed with the two toothed plates on the toothed plate bracket.

[0009] Furthermore, the adjustment control component also includes a sliding piece fixedly connected to the inner wall of the spray outer frame, and an adjustable resistance rod is fixedly connected to the upper end surface of the connecting bracket located above the inner sliding block, and the adjustable resistance rod is in contact and sliding cooperation with the sliding piece; The adjustable resistance rod and the slider form a sliding rheostat, and the sliding rheostat is electrically connected to the PLC controller. When the adjustable resistance rod moves toward the slider, the resistance value of the sliding rheostat increases.

[0010] Furthermore, the transmission component includes a support plate fixedly connected to the outer wall of the rectangular guide frame, a rotating rod is rotatably connected to the support plate, the lower end of the rotating rod and the outer peripheral wall of the rotating shaft are fixedly connected to bevel gears, the two bevel gears are meshed with each other, the upper end of the rotating rod is fixedly connected to a small gear, and a gear ring is fixedly connected to the upper position of the outer peripheral wall of the adjusting sleeve, and the gear ring and the small gear are meshed with each other.

[0011] Furthermore, a strip-shaped protrusion is fixedly connected to the inner side of the concave limiting plate, a groove is provided on the outer surface of the lifting plate, and the strip-shaped protrusion is slidably matched with the groove.

[0012] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention provides a self-adjusting distance spraying assembly. When the width of the chassis guard plate changes, the outer slider and the control piston plate in the main cylinder can be driven to move horizontally. When the control piston plate in the main cylinder moves, the amount of hydraulic oil in the main cylinder will change and pass into the auxiliary cylinder through the oil pipe or the hydraulic oil is sucked 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, and then 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, which can not only automatically adjust the spraying range when the width size of the chassis guard plate changes, avoiding the phenomenon of thick coating or missing coating after spraying, but also enable the multiple fluid pump nozzles to always maintain uniform spacing when adjusting the range to adapt to the width of the chassis guard plate, thereby ensuring the uniformity and consistency of spraying coverage; The present invention provides a flow self-adjusting component. When the width of the chassis guard plate changes, the adjustable resistance rod can synchronously contact and slide relative to the sliding plate, so that the resistance value of the sliding rheostat composed of the adjustable resistance rod and the sliding plate changes. The PLC controller can adjust the telescopic operation of the output end of the servo electric push rod and control the telescopic stroke of the output end of the servo electric push rod, thereby driving the two lateral flow limiting plates on both sides of the fluid pump nozzle to swing inward or outward by a certain amplitude, so that the rectangular elastic nozzle can be contracted or expanded outward to automatically adjust the spraying area of ​​the rectangular elastic nozzle, which can adapt to the change of the spacing of multiple fluid pump nozzle arrays, and further improve the uniformity of the spray. The present invention provides an adjusting sleeve and a valve plate. 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 produce relative rotation, so that the communicating area of ​​the through holes on the two valve plates changes, so as 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 in the width of the chassis guard plate, further optimize the spraying quality, and avoid coating defects caused by flow mismatch. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the structure of the spray outer frame part in the present invention; Figure 3 It is a schematic diagram of the internal structure of the spray outer frame in the present invention; Figure 4 It is a cross-sectional view of the structure of the main cylinder and the auxiliary cylinder in the present invention; Figure 5 It is a schematic diagram of a partial structure of a flow self-regulating component in the present invention; Figure 6 It is a partial structural schematic diagram of the outer sliding block in the present invention; Figure 7 It is a schematic diagram of the structure of the lifting plate part in the present invention; Figure 8 It is an exploded view of the partial structure of the flow self-regulating component in the present invention.

[0015] Fig. 9It is a cross-sectional view of the fluid pump nozzle outlet end and the regulating sleeve structure in the present invention.

[0016] Figure numerals: 1, guide rail; 2, electric slide seat; 3, lateral support frame; 4, spray frame; 5, self-adjusting spray assembly; 51, linear slide rail; 52, center fixed block; 53, inner slide block; 54, outer slide block; 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 self-adjusting assembly; 61 , adjusting sleeve; 62, valve plate; 63, rectangular guide frame; 64, shaft seat; 65, rotating shaft; 66, lateral flow limiting plate; 67, rectangular elastic nozzle; 7, adjusting control component; 71, servo electric push rod; 72, lifting plate; 73, vertical slide rail; 74, lifting block; 75, concave limit plate; 76, tooth plate bracket; 77, transmission gear; 78, slide; 79, adjustable resistance rod; 8, transmission component; 81, support plate; 82, rotating rod; 83, bevel gear; 84, small gear; 85, gear ring; 9, strip protrusion; 10, groove. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The present invention will be further described below in conjunction with the embodiments.

[0019] Example: Refer to Figures 1 to 9 , an automatic spraying device for automobile body, comprising: Two guide rails 1, both guide rails 1 are slidably connected with electric slide seats 2, the outer walls of the two electric slide seats 2 are fixedly connected with lateral support frames 3, and a spraying outer frame 4 is fixedly connected between the two lateral support frames 3; 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 fixed block 52 is fixedly connected to the middle of the linear slide rail 51, and inner sliders 53 and outer sliders 54 are slidably connected on both sides of the central fixed block 52 on the linear slide rail 51, and the lower end surfaces of the central fixed block 52, the inner slider 53 and the outer slider 54 are fixedly installed with fluid pump nozzles 55, and the spraying outer frame 4 The inner wall is fixedly connected with a main cylinder 56 and a sub-cylinder 57. Both the main cylinder 56 and the sub-cylinder 57 are filled with hydraulic oil. The cross-sectional area of ​​the main cylinder 56 is half of the cross-sectional area of ​​the sub-cylinder 57. An oil pipe 58 is fixedly connected between the main cylinder 56 and the sub-cylinder 57. The inner walls of the main cylinder 56 and the sub-cylinder 57 are sealed and slidably connected with a control piston plate 59. The two control piston plates 59 in the main cylinder 56 and the sub-cylinder 57 are respectively fixedly connected with 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 sub-cylinder 57 and the inner wall of the sub-cylinder 57. 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; The self-adjusting distance spraying assembly 5 also includes an electric lifting rod 512 fixedly mounted on the lower end of the lateral support frame 3, a distance sensor 513 is fixedly mounted on the output end of the electric lifting rod 512, and the distance sensor 513 is used to monitor the width change of the chassis guard plate in real time, and an electric telescopic rod 514 and a PLC controller 515 are fixedly mounted on the outer wall of the spraying outer frame 4, and the distance sensor 513, the electric telescopic rod 514 and the PLC controller 515 are electrically connected, and the telescopic end of the electric telescopic rod 514 is fixedly connected to the connecting bracket 510 above the outer slider 54; When the width of the chassis guard plate changes, the outer slider 54 and the control piston plate 59 in the main cylinder 56 can move horizontally. When the control piston plate 59 in the main cylinder 56 moves, the amount of hydraulic oil in the main cylinder 56 will change and pass into the auxiliary cylinder 57 through the oil pipe 58 or the hydraulic oil is sucked from the auxiliary cylinder 57, so that the control piston plate 59 in the auxiliary cylinder 57 synchronously moves half of the moving distance of the control piston plate 59 in the main cylinder 56, and then 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 the multiple fluid pump nozzles 55 can be dynamically adjusted, so that the multiple fluid pump nozzles 55 can always maintain a uniform spacing when adjusting the spacing to adapt to the width of the chassis guard plate, thereby ensuring the uniformity and consistency of the spray coverage.

[0020] The outlet end of the fluid pump nozzle 55 is rotatably connected to a flow self-regulating component 6, which includes an adjusting sleeve 61 rotatably connected to the outlet end of the fluid pump nozzle 55, and the inner wall of the adjusting sleeve 61 and the inner wall of the outlet end of the fluid pump nozzle 55 are fixedly connected to valve plates 62, and a plurality of through holes are opened on the two valve plates 62; Specifically, the through holes on the two valve plates 62 are staggered, and 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 of the fluid pump nozzle 55; A rectangular flow guide 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 sealed and rotatably connected to the upper end of the rectangular flow guide frame 63, the outer wall of the rectangular flow guide frame 63 is fixedly connected to two symmetrically arranged shaft seats 64, the two shaft seats 64 are rotatably connected to the shafts 65, the outer peripheral walls of the two shafts 65 are fixedly connected to lateral flow limiting plates 66, a rectangular elastic nozzle 67 is fixedly connected between the two lateral flow limiting plates 66, and the upper end of the rectangular elastic nozzle 67 is fixedly connected to the lower end of the rectangular flow guide frame 63; Specifically, the rectangular elastic nozzle 67 is made of a vulcanized polyurethane elastomer material, which has high wear resistance, high tensile strength and high elastic recovery performance, and can maintain long-term use under dynamic high loads. The rectangular elastic nozzle 67 has a small opening at the bottom in the initial state, so when the lateral flow limiting plate 66 expands or contracts, the rectangular elastic nozzle 67 has a strong tendency to restore the initial state under its own elastic action, and will not cause the middle position of the rectangular elastic nozzle 67 to expand outward during the process of the two lateral flow limiting plates 66 swinging inward, so as to ensure the rectangular elastic nozzle 67 to regulate the flow of paint. At the same time, because the rectangular elastic nozzle 67 has high tensile strength and elastic recovery performance, and can be used for a long time under high load conditions, the rectangular elastic nozzle 67 will not have a reduced elastic recovery ability after long-term use. The inner wall of the spraying outer frame 4 is fixedly installed with an adjustment control component 7, which includes a plurality of servo electric push rods 71 ​​fixedly installed on the inner wall of the spraying outer frame 4, and the output ends of the plurality of servo electric push rods 71 ​​are fixedly connected with a lifting plate 72, and the outer walls of the central fixed block 52, the inner slider 53 and the outer slider 54 are fixedly connected with a vertical slide rail 73, and the inner side of each vertical slide rail 73 is slidably connected with a lifting block 74, and the outer walls of the plurality of lifting blocks 74 are fixedly connected with a concave limiting plate 75, and the inner side of the concave limiting plate 75 is slidably matched with the lifting plate 72, and the inner side of the concave limiting plate 75 is fixedly connected with a strip protrusion 9, and the outer surface of the lifting plate 72 is provided with a groove 10, and the strip protrusion 9 is slidably matched with the groove 10, and each lifting block 7 4 are fixedly connected with a toothed plate bracket 76 at the lower end, and two toothed plates are arranged on the toothed plate bracket 76. The ends of the two rotating shafts 65 are fixedly connected with transmission gears 77, and the two transmission gears 77 are respectively meshed with the two toothed plates on the toothed plate bracket 76. The adjustment control component 7 also includes a slide 78 fixedly connected to the inner wall of the spray outer frame 4. The upper end surface of the connecting bracket 510 located above the inner slider 53 is fixedly connected with an adjustable resistance rod 79, and the adjustable resistance rod 79 is in contact and sliding cooperation with the slide 78, wherein the adjustable resistance rod 79 and the slide 78 form a sliding rheostat, and the sliding rheostat is electrically connected to the PLC controller 515. When the adjustable resistance rod 79 moves toward the slide 78, the resistance value of the sliding rheostat increases; Specifically, the PLC controller 515 outputs a corresponding PWM signal to the servo electric push rod 71 by monitoring the change in the resistance value of the sliding rheostat, so as to control the extension and retraction of the output end of the servo electric push rod 71 and control the extension and retraction stroke of the output end of the servo electric push rod 71; When the width of the chassis guard plate changes, the adjustable resistor rod 79 will synchronously contact and slide relative to the slide 78, so that the resistance value of the sliding rheostat composed of the adjustable resistor rod 79 and the slide 78 changes. The PLC controller 515 can control the extension or retraction of the servo electric push rod 71, and then drive the two lateral flow 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 nozzle 67 can be contracted or expanded to automatically adjust the spraying area of ​​the rectangular elastic nozzle 67, which can adapt to the changes in the array spacing of multiple fluid pump nozzles 55.

[0021] The outer wall of the rectangular guide frame 63 is fixedly connected with a transmission component 8, and the transmission component 8 includes a support plate 81 fixedly connected to the outer wall of the rectangular guide frame 63, and a rotating rod 82 is rotatably connected to the support plate 81. The lower end of the rotating rod 82 and the outer peripheral wall of the rotating shaft 65 are fixedly connected with a bevel gear 83, and the two bevel gears 83 are meshed with each other. The upper end of the rotating rod 82 is fixedly connected with a small gear 84, and the outer peripheral wall of the adjusting sleeve 61 is fixedly connected with a gear ring 85, and the gear ring 85 and the small gear 84 are meshed with each other. 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 relative to each other, so that the communicating area of ​​the through holes on the two valve plates 62 changes, so as to adjust the flow rate of the paint sprayed by the fluid pump nozzle 55 accordingly, so that the paint flow rate can automatically match the change in the width of the chassis guard plate, further optimize the spraying quality, and avoid coating defects caused by flow mismatch.

[0022] The working principle of the present invention is as follows: The chassis guard plate is fixed at a suitable height position just below the spray frame 4, and the spray frame 4 is driven to move by controlling the two electric slides 2 to move horizontally relative to the two guide rails 1. When the spray frame 4 moves relative to the chassis guard plate, it can drive the distance sensor 513 to move synchronously. The distance sensor 513 is used 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 has changed; When the width of the chassis guard plate changes, the distance between the distance sensor 513 and the side of 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 connecting bracket 510 above the outer slider 54 to move, thereby causing the outer slider 54 and the control piston plate 59 in the main cylinder 56 to move horizontally. During the movement, the control piston plate 59 in the main cylinder 56 will change the amount of hydraulic oil in the main cylinder 56 and pass it into the auxiliary cylinder 57 through the oil pipe 58 or suck the hydraulic oil from the auxiliary cylinder 57. It can be known from Pascal's law that the incompressible liquid in a closed container can transfer pressure in an equal value, 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. 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 uniform spacing when the spacing is adjusted to adapt to the width of the chassis guard plate. When the width of the chassis guard plate changes and the connecting bracket 510 above the inner slider 53 moves, the adjustable resistance rod 79 can synchronously contact and slide relative to the slide 78, so that the resistance value of the sliding rheostat composed of the adjustable resistance rod 79 and the slide 78 changes. 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 output module to switch the power 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, so as to drive the lifting plate 72 to rise or fall by a corresponding distance. At the same time, when the lifting plate 72 is lifted and moved, the meshing cooperation of the two toothed plate brackets 76 and the two transmission gears 77 on the toothed plate bracket 76 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, so that the rectangular elastic nozzle 67 can be contracted or expanded outward to automatically adjust the spraying area of ​​the rectangular elastic nozzle 67; When the two lateral flow limiting plates 66 swing inward or outward, that is, when the two rotating shafts 65 rotate, the meshing cooperation of the two bevel gears 83 can be utilized to drive the rotating rod 82 to rotate, and the meshing transmission of the small gear 84 and the gear ring 85 at the upper end of the rotating rod 82 can be used to drive the adjusting sleeve 61 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 produce relative rotation. 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 interconnected area of ​​the through holes is reduced, so as to limit the flow rate of the paint. When the width of the chassis guard plate becomes larger, the interconnected area of ​​the through holes can be increased.

[0023] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic spraying device for automobile body, characterized in that: include: Two guide rails (1), each of the guide rails (1) being slidably connected to an electric slide seat (2), each of the outer walls of the two electric slide seats (2) being fixedly connected to a lateral support frame (3), and a spraying outer frame (4) being fixedly connected between the two lateral support frames (3); The self-adjusting spray assembly (5) comprises a linear slide rail (51) fixedly connected to the inner wall of a spray outer frame (4); a central fixed block (52) is fixedly connected to the middle of the linear slide rail (51); inner sliders (53) and outer sliders (54) are slidably connected to both sides of the central fixed block (52) on the linear slide rail (51); fluid pump nozzles (55) are fixedly mounted on the lower end surfaces of the central fixed block (52), the inner sliders (53) and the outer sliders (54); a main cylinder barrel (56) and a secondary cylinder barrel (57) are fixedly connected to the inner wall of the spray outer frame (4); the inner surfaces of the main cylinder barrel (56) and the secondary cylinder barrel (57) are Both are 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 an oil pipe (58) is fixedly connected between the main cylinder (56) and the auxiliary cylinder (57), and the inner walls of the main cylinder (56) and the auxiliary cylinder (57) are both sealed and slidably connected with a control piston plate (59), and 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), 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 to a flow self-regulating component (6).

2. The automatic spraying device for automobile body according to claim 1, characterized in that: The self-adjusting distance spraying assembly (5) further comprises an electric lifting rod (512) fixedly mounted on the lower end of the lateral support frame (3); a distance sensor (513) is fixedly mounted on the output end of the electric lifting rod (512); 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 mounted 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; and the telescopic end of the electric telescopic rod (514) is fixedly connected to the connecting bracket (510) above the outer slider (54).

3. The automatic spraying device for automobile body according to claim 1, characterized in that: The flow self-regulating component (6) comprises an adjusting sleeve (61) rotatably connected to the outlet end of the fluid pump nozzle (55); the inner wall of the adjusting sleeve (61) and the inner wall of the outlet end of the fluid pump nozzle (55) are both fixedly connected to a valve plate (62); a plurality of through holes are provided on the two valve plates (62); a rectangular flow guide 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 sealed and rotatably connected to the upper end of the rectangular flow guide frame (63); the outer wall of the rectangular flow guide frame (63) is fixedly connected to the outer wall of the rectangular flow guide frame (63); Two symmetrically arranged shaft seats (64) are connected, and the two shaft seats (64) are rotatably connected to a rotating shaft (65). The outer peripheral walls of the two rotating shafts (65) are fixedly connected to a lateral flow limiting plate (66). A rectangular elastic nozzle (67) is fixedly connected between the two lateral flow limiting plates (66). The upper end of the rectangular elastic nozzle (67) is fixedly connected to the lower end of the rectangular guide frame (63). An adjustment 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 guide frame (63).

4. The automatic spraying device for automobile body according to claim 3, characterized in that: The regulating and controlling component (7) comprises a plurality of servo electric push rods (71) fixedly mounted on the inner wall of the spraying outer frame (4); the output ends of the plurality of servo electric push rods (71) are fixedly connected to a lifting plate (72); the outer walls of the central fixed block (52), the inner sliding block (53) and the outer sliding block (54) are fixedly connected to a vertical slide rail (73); the inner side of each of the vertical slide rails (73) is slidably connected to a lifting block (74); the outer walls of the plurality of lifting blocks (74) are fixedly connected to a concave limiting plate (75); the inner side of the concave limiting plate (75) is slidably matched with the lifting plate (72); the lower end of each lifting block (74) is fixedly connected to a toothed plate bracket (76); the toothed plate bracket (76) is provided with two toothed plates; the ends of the two rotating shafts (65) are fixedly connected to transmission gears (77); the two transmission gears (77) are respectively meshed with the two toothed plates on the toothed plate bracket (76).

5. The automatic spraying device for automobile body according to claim 4, characterized in that: The regulating control component (7) further comprises a sliding plate (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 sliding block (53); the adjustable resistance rod (79) is in contact and sliding cooperation with the sliding plate (78); The adjustable resistance rod (79) and the slider (78) form a sliding rheostat, and the sliding rheostat is electrically connected to a PLC controller (515). When the adjustable resistance rod (79) moves toward the slider (78), the resistance value of the sliding rheostat increases.

6. The automatic spraying device for automobile body according to claim 3, characterized in that: The transmission component (8) comprises a support plate (81) fixedly connected to the outer wall of the rectangular guide frame (63); a rotating rod (82) is rotatably connected to the support plate (81); a bevel gear (83) is 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 gear ring (85) is fixedly connected to the upper position of the outer peripheral wall of the adjusting sleeve (61); the gear ring (85) and the small gear (84) are meshed with each other.

7. The automatic spraying device for automobile body according to claim 4, 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 provided on the outer surface of the lifting plate (72), and the strip-shaped protrusion (9) is slidably matched with the groove (10).

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