Device for automatic multi-surface paint spraying of truck door

Abstract

The utility model discloses an automatic multi-surface paint spraying device for a truck door, and relates to an automatic spraying device. The utility model aims to solve the problems of high labor intensity, severe working environment, low working efficiency, poor safety, substandard emission and the like in the conventional manual paint spraying process of the wagon door of the railway vehicle depot. The drying device comprises a platform support, a conveying mechanism, a module support, an upper spray gun module, a lower spray gun module, a lifting mechanism and a drying warehouse, the platform support is horizontally and fixedly connected to the ground, the conveying mechanism is arranged on the upper end face of the platform support in the length direction, and the module support stretches across the two sides of the middle of the platform support; the upper spray gun module is fixedly connected to the upper portion of the module support, the lower spray gun module is fixedly connected to the middle of the module support, the lifting mechanism is fixedly connected to the inner side of the module support, and the drying warehouse covers the outer side of the platform support at the rear end of the module support. The device is used for automatic multi-surface paint spraying of the truck door.

Description

Technical Field

[0001] The utility model relates to an automatic spraying device, in particular to a device for automatically spraying paint on multiple surfaces of a truck door. Background Art

[0002] At present, during the maintenance of freight cars in various railway vehicle sections, most of the doors after new or repaired cars are sprayed with manual handheld spray guns and dried naturally. The production and process conversion workload is large, the production process time is long, the labor protection conditions of the workers are poor, and the consistency of the sprayed surface is poor. In addition, the environmental protection equipment is missing and does not meet the environmental emission requirements. Therefore, it is necessary to use automatic painting and drying coating equipment to reduce the number of operators, reduce the workload of operators, improve the labor protection conditions of operators, and set environmental protection equipment to meet national and local environmental emission standards. Utility Model Content

[0003] In order to solve the problems of high labor intensity, bad working environment, low working efficiency, poor safety and substandard emission in the manual painting process of truck doors in existing railway vehicle depots, the utility model further proposes a device for automatic multi-side painting of truck doors.

[0004] The technical solution adopted by the utility model to solve the above technical problems is:

[0005] A device for automatic multi-sided painting of truck doors includes a platform bracket, a conveying mechanism, a module bracket, an upper spray gun module, a lower spray gun module, a lifting mechanism and a drying warehouse. The platform bracket is horizontally fixed to the ground, the conveying mechanism is arranged on the upper end surface of the platform bracket along the length direction, the module bracket spans both sides of the middle part of the platform bracket, the upper spray gun module is fixed to the upper part of the module bracket, the lower spray gun module is fixed to the middle part of the module bracket, the lifting mechanism is fixed to the inner side of the module bracket, and the drying warehouse cover is buckled on the outer side of the platform bracket at the rear end of the module bracket.

[0006] Furthermore, a feeding end is provided at the front end of the platform bracket, and the feeding end is arranged in front of the conveying mechanism. A pushing mechanism is provided at the front end of the feeding end, and straightening mechanisms are symmetrically provided on both sides of the feeding end.

[0007] Furthermore, the pushing mechanism includes a rodless cylinder, which is vertically fixed to the middle of the front end of the upper end face of the platform bracket and is arranged toward the conveying mechanism. The straightening mechanism includes two double-axis cylinders, which are vertically fixed to the side walls of the platform bracket in parallel and are arranged toward the middle of the platform bracket.

[0008] Further, the upper spray gun module includes an upper X-axis driving device, an upper Y-axis dust-proof slideway, an upper Y-axis driving device, an upper spray gun device, and two upper X-axis dust-proof slideways. The two upper X-axis dust-proof slideways are arranged in parallel along the width direction of the module bracket. Each upper X-axis dust-proof slideway is arranged along the length direction of the module bracket. The upper X-axis driving device is respectively connected to one end of the upper X-axis dust-proof slideway. An upper X-axis slider is provided on the upper X-axis dust-proof slideway. The upper X-axis driving device drives the upper X-axis slider to reciprocate along the length direction of the corresponding upper X-axis dust-proof slideway. The upper Y-axis dust-proof slideway is arranged along the width direction of the module bracket. The upper Y-axis dust-proof slideway is fixedly connected to the two upper X-axis sliders respectively. The upper Y-axis driving device is connected to one end of the upper Y-axis dust-proof slideway. An upper Y-axis slider is provided on the upper Y-axis dust-proof slideway. The upper Y-axis driving device drives the upper Y-axis slider to reciprocate along the length direction of the upper Y-axis dust-proof slideway. The upper spray gun device is fixedly connected to the upper Y-axis slider.

[0009] Further, the nozzle of the upper spray gun device is arranged downward.

[0010] Further, the lower spray gun module includes a lower X-axis driving device, a lower Y-axis dust-proof slideway, a lower Y-axis driving device, a lower spray gun device, and two lower X-axis dust-proof slideways. The two lower X-axis dust-proof slideways are arranged in parallel along the width direction of the module bracket. Each lower X-axis dust-proof slideway is arranged along the length direction of the module bracket. The lower X-axis driving device is respectively connected to one end of the lower X-axis dust-proof slideway. A lower X-axis slider is provided on the lower X-axis dust-proof slideway. The lower X-axis driving device drives the lower X-axis slider to reciprocate along the length direction of the corresponding lower X-axis dust-proof slideway. The lower Y-axis dust-proof slideway is arranged along the width direction of the module bracket. The lower Y-axis dust-proof slideway is fixedly connected to the two lower X-axis sliders respectively. The lower Y-axis driving device is connected to one end of the lower Y-axis dust-proof slideway. A lower Y-axis slider is provided on the lower Y-axis dust-proof slideway. The lower Y-axis driving device drives the lower Y-axis slider to reciprocate along the length direction of the lower Y-axis dust-proof slideway. The lower spray gun device is fixedly connected to the lower Y-axis slider.

[0011] Further, the nozzle of the lower spray gun device is arranged upward.

[0012] Further, the lifting mechanism includes a base, an upper bracket, a lifting cylinder, and four guiding mechanisms. The base is fixedly connected to the ground inside the module bracket. The upper bracket is arranged above the base. The lifting cylinder is arranged vertically upward and is fixedly connected between the middle of the lower end face of the upper bracket and the middle of the base. One guiding mechanism is respectively provided between each of the four corners of the lower end face of the upper bracket and the base.

[0013] Further, the guiding mechanism includes a linear bearing, a guide post, and a guide post clamping mechanism. The linear bearing is fixedly connected to the upper end surface of the base. The guide post is vertically inserted into the linear bearing and is slidably connected to the linear bearing. The upper end of the guide post is fixedly connected to the lower end of the guide post clamping mechanism, and the upper end of the guide post clamping mechanism is fixedly connected to the lower end of the upper support.

[0014] Further, the upper support includes a bottom frame and four lifting columns. At the upper ends of the four corners of the bottom frame, a lifting column is vertically fixedly connected respectively. At the upper end of the lifting column, an L-shaped support plate is vertically fixedly connected. The L-shaped support plates on both sides of the bottom frame are arranged oppositely with their openings facing inwards. The outer sides between the L-shaped support plates on the same side are fixedly connected by a connecting rod. The guiding mechanism is arranged below the lifting columns.

[0015] The beneficial effects of the present utility model compared with the prior art are as follows:

[0016] 1. The present utility model is an automatic spraying and drying device for parts that need to be sprayed on multiple sides. The upper and lower spray gun modules cooperate with the lifting device, which belongs to a multi-functional motion structure and can complete movements along the X-axis, Y-axis, and Z-axis within a certain space. The spraying device can be changed to a brush, a cleaning device, etc. according to actual needs to achieve different functional requirements.

[0017] 2. By adjusting the structural dimensions of the platform support, the present utility model can meet the limitations of complex on-site environments and complete functions such as multi-sided spraying and cleaning of parts.

[0018] 3. The lifting device of the present utility model can drive the part to be lifted to a certain height, and operate on different surfaces of the part without flipping, which can effectively improve work efficiency.

[0019] 4. All actions of the (upper and lower) spray gun modules and the lifting device of the present utility model can be controlled separately and can also cooperate with each other.

[0020] 6. The present utility model can modify the lifting mechanism and can better adapt to the working conditions in other fields. Description of the Drawings

[0021] Figure 1 is the front view schematic diagram of the overall structure of the present utility model.

[0022] Figure 2 is Figure 1 the top view schematic diagram of

[0023] Figure 3 is the structural schematic diagram of the upper spray gun module in the present utility model;

[0024] Figure 4 is the structural schematic diagram of the lower spray gun module in the present utility model;

[0025] Figure 5 is a schematic structural view of the lifting mechanism in the present utility model;

[0026] Figure 6 is a schematic structural view of the upper support in the present utility model.

[0027] In the figure: 100 - platform support, 200 - conveying mechanism, 300 - module support, 400 - upper spray gun module, 500 - lower spray gun module, 600 - lifting mechanism, 700 - drying chamber;

[0028] 101 - rodless cylinder, 102 - double - axis cylinder;

[0029] 401 - upper - layer X - axis driving device, 402 - upper - layer X - axis dust - proof slideway, 403 - upper - layer Y - axis dust - proof slideway, 404 - upper - layer Y - axis driving device, 405 - upper - layer spray gun device;

[0030] 501 - lower - layer X - axis driving device, 502 - lower - layer X - axis dust - proof slideway, 503 - lower - layer Y - axis dust - proof slideway, 504 - lower - layer Y - axis driving device, 505 - lower - layer spray gun device;

[0031] 601 - base, 602 - linear bearing, 603 - guide pillar, 604 - guide pillar clamping mechanism, 605 - upper support, 606 - lifting cylinder; 6051 - bottom frame, 6052 - lifting column, 6053 - L - shaped support plate, 6054 - connecting rod. Specific embodiments

[0032] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer and more understandable, the following further details the utility model in combination with the attached drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0033] Specific embodiment 1: Combining Figures 1 to 6 To illustrate this embodiment, the device for automatically multi - faceted painting of truck doors described in this embodiment includes a platform support 100, a conveying mechanism 200, a module support 300, an upper spray gun module 400, a lower spray gun module 500, a lifting mechanism 600 and a drying chamber 700. The platform support 100 is horizontally and fixedly connected to the ground. The conveying mechanism 200 is arranged along the length direction on the upper end surface of the platform support 100. The module support 300 straddles both sides of the middle part of the platform support 100. The upper spray gun module 400 is fixedly connected to the upper part of the module support 300. The lower spray gun module 500 is fixedly connected to the middle part of the module support 300. The lifting mechanism 600 is fixedly connected to the inner side of the module support 300. The drying chamber 700 covers the outside of the platform support 100 at the rear end of the module support 300.

[0034] The purpose of the utility model is to provide an automatic multi-faceted spraying and drying device for truck doors. It has the characteristics of high structural integration, convenience and good practicality. The device can realize multi-faceted automatic spraying operation of the door by using a variety of power drive modes. The motion mechanism is modularized, easy to disassemble and repair, and improves the reliability and stability of the mechanism.

[0035] The conveying mechanism 200 includes a conveying platform and a chain transmission mechanism. The chain transmission mechanism is arranged along the length direction of the platform support 100 , and the chain transmission mechanism drives the conveying platform to move along the length direction of the platform support 100 .

[0036] The platform bracket 100 is fixedly connected to the ground, the conveying mechanism 200 is fixedly connected to the platform bracket 100 by bolts, and controls the horizontal movement of the car door on the platform bracket 100. The module bracket 300 is fixedly connected to the ground, and the installation position is installed in coordination with the platform bracket 100. The module bracket 300 spans across both sides of the platform bracket 100, leaving enough space for the upper spray gun module 400 and the lower spray gun module 500 to spray paint. The upper spray gun module 400 and the lower spray gun module 500 are fixedly installed on the upper end of the module bracket 300 by bolts. The lifting mechanism 600 is fixedly installed on the ground, and the installation position needs to match the position of the car door on the conveying mechanism 200. The drying warehouse 700 is fixedly installed on the ground.

[0037] Specific implementation method 2: Combination Figure 2 To explain this embodiment, the platform support 100 described in this embodiment is provided with a feeding end at the front end, which is arranged in front of the conveying mechanism 200, a pushing mechanism is provided at the front end of the feeding end, and straightening mechanisms are symmetrically provided on both sides of the feeding end. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0038] Specific implementation method three: Combination Figure 2 This embodiment is described. The pushing mechanism in this embodiment includes a rodless cylinder 101, which is vertically fixed to the middle of the front end of the upper end face of the platform bracket 100 and is arranged toward the conveying mechanism 200. The straightening mechanism includes two double-axis cylinders 102, which are vertically fixed to the side wall of the platform bracket 100 in parallel and are arranged toward the middle of the platform bracket 100. The undisclosed technical features in this embodiment are the same as those in the second specific embodiment.

[0039] The rodless cylinder 101 is fixedly connected to the front end of the platform bracket 100, with a small gap between it and the conveying mechanism 200, and the double-axis cylinder 102 is fixedly connected to both sides of the rodless cylinder 101. After the parts are placed on the loading end of the platform bracket 100, the double-axis cylinder 102 is used to align the car door, and then the rodless cylinder 101 pushes the car door onto the conveying mechanism 200 and enters the painting station. This arrangement facilitates the smooth transmission of the car door on the transmission chain 200.

[0040] Specific Embodiment 4: In combination with Figure 3 To illustrate this embodiment, the upper spray gun module 400 described in this embodiment includes an upper layer X-axis driving device 401, an upper layer Y-axis dust-proof slideway 403, an upper layer Y-axis driving device 404, an upper layer spray gun device 405, and two upper layer X-axis dust-proof slideways 402. The two upper layer X-axis dust-proof slideways 402 are arranged in parallel along the width direction of the module bracket 300, and each upper layer X-axis dust-proof slideway 402 is arranged along the length direction of the module bracket 300. The upper layer X-axis driving device 401 is respectively connected to one end of the upper layer X-axis dust-proof slideway 402. An upper layer X-axis slider is provided on the upper layer X-axis dust-proof slideway 402. The upper layer X-axis driving device 401 drives the upper layer X-axis slider to reciprocate along the length direction of the corresponding upper layer X-axis dust-proof slideway 402. The upper layer Y-axis dust-proof slideway 403 is arranged along the width direction of the module bracket 300. The upper layer Y-axis dust-proof slideway 403 is fixedly connected to the two upper layer X-axis sliders respectively. The upper layer Y-axis driving device 404 is connected to one end of the upper layer Y-axis dust-proof slideway 403. An upper layer Y-axis slider is provided on the upper layer Y-axis dust-proof slideway 403. The upper layer Y-axis driving device 404 drives the upper layer Y-axis slider to reciprocate along the length direction of the upper layer Y-axis dust-proof slideway 403. The upper layer spray gun device 405 is fixedly connected to the upper layer Y-axis slider. The technical features not disclosed in this embodiment are the same as those in Specific Embodiment 1.

[0041] The upper spray gun module 400 is fixedly installed at the upper end of the module bracket 300 through bolts, and the installation position is coordinated with the installation of the vehicle door, which can meet the spraying operation on the upper plane of the vehicle door.

[0042] The upper layer X-axis driving device 401 is fixedly connected to one end of the upper layer X-axis dust-proof slideway 402, and provides the power for the upper layer Y-axis dust-proof slideway 403 to move linearly on the upper layer X-axis dust-proof slideway 402 through a coupling. The upper layer Y-axis dust-proof slideway 403 is fixedly connected to the upper end of the upper layer X-axis dust-proof slideway 402. The upper layer Y-axis driving device 404 is fixedly connected to the upper layer Y-axis dust-proof slideway 403. The upper layer spray gun device 405 is fixedly connected to the upper layer Y-axis slider on the upper layer Y-axis dust-proof slideway 403. With such a setting, it is convenient to drive the upper layer spray gun device 405 to achieve reciprocating motion in the horizontal direction, so as to complete the spraying operation on the upper end surface of the vehicle door.

[0043] Specific Embodiment 5: In combination with Figure 3 To illustrate this embodiment, the nozzle of the upper layer spray gun device 405 is arranged facing downwards. The technical features not disclosed in this embodiment are the same as those in Specific Embodiment 4.

[0044] Specific Embodiment 6: In combination with Figure 4To describe this embodiment, the lower spray gun module 500 in this embodiment includes a lower X-axis driving device 501, a lower Y-axis dust-proof slideway 503, a lower Y-axis driving device 504, a lower spray gun device 505, and two lower X-axis dust-proof slideways 502. The two lower X-axis dust-proof slideways 502 are arranged in parallel along the width direction of the module bracket 300, and each lower X-axis dust-proof slideway 502 is arranged along the length direction of the module bracket 300. The lower X-axis driving device 501 is respectively connected to one end of the lower X-axis dust-proof slideway 502. A lower X-axis slider is provided on the lower X-axis dust-proof slideway 502. The lower X-axis driving device 501 drives the lower X-axis slider to reciprocate along the length direction of the corresponding lower X-axis dust-proof slideway 502. The lower Y-axis dust-proof slideway 503 is arranged along the width direction of the module bracket 300. The lower Y-axis dust-proof slideway 503 is fixedly connected to the two lower X-axis sliders respectively. The lower Y-axis driving device 504 is connected to one end of the lower Y-axis dust-proof slideway 503. A lower Y-axis slider is provided on the lower Y-axis dust-proof slideway 503. The lower Y-axis driving device 504 drives the lower Y-axis slider to reciprocate along the length direction of the lower Y-axis dust-proof slideway 503. The lower spray gun device 505 is fixedly connected to the lower Y-axis slider. The technical features not disclosed in this embodiment are the same as those in the first specific embodiment.

[0045] The lower spray gun module 500 is fixedly installed on the plane of the module bracket 300 by bolts. The installation height of the lower spray gun module 500 is higher than that of the conveying mechanism 200, which can meet the spraying operation of the lower plane of the car door.

[0046] The composition and connection relationship of the lower spray gun module 500 are the same as those of the upper spray gun module 400.

[0047] Specific embodiment seven: Combining Figure 4 To describe this embodiment, the nozzle of the lower spray gun device 505 in this embodiment is arranged upward. The technical features not disclosed in this embodiment are the same as those in the sixth specific embodiment.

[0048] Specific embodiment eight: Combining Figure 5 To describe this embodiment, the lifting mechanism 600 in this embodiment includes a base 601, an upper bracket 605, a lifting cylinder 606, and four guiding mechanisms. The base 601 is fixedly connected to the ground inside the module bracket 300. The upper bracket 605 is arranged above the base 601. The lifting cylinder 606 is arranged vertically upward and is fixedly connected between the middle of the lower end face of the upper bracket 605 and the middle of the base 601. One guiding mechanism is respectively provided between each of the four corners of the lower end face of the upper bracket 605 and the base 601. The technical features not disclosed in this embodiment are the same as those in the first specific embodiment.

[0049] The base 601 is fixedly connected to the ground at a position matching the platform bracket 100 to ensure that the lifted car door is within the spraying operation range. The lifting cylinder 606 drives the upper bracket 605 to perform reciprocating motion in the vertical direction, lift the car door, and then perform spraying work on the upper and lower surfaces.

[0050] Specific Embodiment Nine: Combining Figure 5 To illustrate this embodiment, the guiding mechanism described in this embodiment includes a linear bearing 602, a guide post 603, and a guide post clamping mechanism 604. The linear bearing 602 is fixedly connected to the upper end surface of the base 601. The guide post 603 is vertically inserted into the linear bearing 602 and is slidably connected to the linear bearing 602. The upper end of the guide post 603 is fixedly connected to the lower end of the guide post clamping mechanism 604, and the upper end of the guide post clamping mechanism 604 is fixedly connected to the lower end of the upper bracket 605. The technical features not disclosed in this embodiment are the same as those in Specific Embodiment Eight.

[0051] When the parts are transferred to the painting station through the transfer mechanism 200, they are lifted by the lifting cylinder 606. The upper plane of the upper bracket 605 directly contacts the four sides of the parts, lifting the parts to a certain height. The upper spray gun module 400 and the lower spray gun module 500 simultaneously spray both sides of the parts. After the spraying operation is completed, the lifting cylinder 606 lowers the parts onto the transfer mechanism 200, and the parts enter the drying chamber 700 for drying.

[0052] Specific Embodiment Ten: Combining Figure 6 To illustrate this embodiment, the upper bracket 605 described in this embodiment includes a bottom frame 6051 and four lifting columns 6052. One lifting column 6052 is vertically and fixedly connected to the upper end of each of the four corners of the bottom frame 6051. The upper ends of the lifting columns 6052 are vertically and fixedly connected to an L-shaped support plate 6053. The openings of the L-shaped support plates 6053 on both sides of the bottom frame 6051 face inward and are arranged opposite to each other. The outer sides between the L-shaped support plates 6053 on the same side are fixedly connected by a connecting rod 6054. The guiding mechanism is arranged below the lifting columns 6052. The technical features not disclosed in this embodiment are the same as those in Specific Embodiment Eight.

[0053] The L-shaped support plate 6053 is used to support the parts. After double-sided spraying is completed, the unsprayed areas at the supported parts can be manually supplemented with spraying, and then enter the drying chamber 700 for drying.

[0054] In addition, all cylinders are equipped with solenoid valves, inlet pipes, and outlet pipes, and automatic painting operations are achieved through program control.

[0055] When the present utility model is applied in other embodiments, it needs to be used in conjunction with the loading and unloading mechanisms, or used as a work station of the entire production line. At the same time, sensors need to be added to each work station according to the actual working conditions to feedback the part position information. The spraying and drying operations of the parts are automatically controlled by the program. Further, the ordinary conveyor chain is changed to a double-speed chain, and a blocking cylinder is equipped for each work station to freely control the operation time of the parts at each work station without affecting the operation of other parts on the conveyor chain. With such a setting, the drying time of the parts in the drying chamber can be controlled by the program under different environmental conditions.

[0056] The upper spray gun module and the lower spray gun module can change the stroke of the module according to actual needs, or be used simultaneously / individually for the working ranges of different processes.

[0057] The spray gun device can be changed to the corresponding tooling or device according to different process requirements.

[0058] In addition, by changing the structural length of the platform bracket 100, other work stations can be added to adapt to the corresponding working conditions.

[0059] All the brackets of the equipment can be made of aluminum alloy with a relatively light weight, making the device more corrosion-resistant.

[0060] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A device for automatic multi-sided painting of truck doors, characterized in that: The invention comprises a platform support (100), a conveying mechanism (200), a module support (300), an upper spray gun module (400), a lower spray gun module (500), a lifting mechanism (600) and a drying storehouse (700). The platform support (100) is horizontally fixed to the ground. The conveying mechanism (200) is arranged on the upper end surface of the platform support (100) along the length direction. The module support (300) spans both sides of the middle part of the platform support (100). The upper spray gun module (400) is fixed to the upper part of the module support (300). The lower spray gun module (500) is fixed to the middle part of the module support (300). The lifting mechanism (600) is fixed to the inner side of the module support (300). The drying storehouse (700) is buckled on the outer side of the platform support (100) at the rear end of the module support (300).

2. The device for automatic multi-surface painting of truck doors according to claim 1, characterized in that: The front end of the platform bracket (100) is provided with a feeding end, which is arranged in front of the conveying mechanism (200), the front end of the feeding end is provided with a pushing mechanism, and both sides of the feeding end are symmetrically provided with straightening mechanisms.

3. The device for automatic multi-surface painting of truck doors according to claim 2, characterized in that: The pushing mechanism comprises a rodless cylinder (101), which is vertically fixed to the middle of the front end of the upper end face of the platform bracket (100) and is arranged toward the conveying mechanism (200). The straightening mechanism comprises two double-axis cylinders (102), which are vertically fixed to the side wall of the platform bracket (100) in parallel and are arranged toward the middle of the platform bracket (100).

4. The device for automatic multi-surface painting of truck doors according to claim 1, characterized in that: The upper spray gun module (400) comprises an upper X-axis driving device (401), an upper Y-axis dustproof slideway (403), an upper Y-axis driving device (404), an upper spray gun device (405) and two upper X-axis dustproof slideways (402), wherein the two upper X-axis dustproof slideways (402) are arranged in parallel along the width direction of the module support (300), and each upper X-axis dustproof slideway (402) is arranged along the length direction of the module support (300), and the upper X-axis driving device (401) is respectively connected to one end of the upper X-axis dustproof slideway (402), and the upper X-axis dustproof slideway (402) is provided with an upper X-axis slider, and the upper X-axis driving device (401) is provided with an upper X-axis slider, and the upper X-axis driving device (405) is provided with an upper Y-axis dustproof slideway (403). The upper X-axis sliders (401) are driven to slide back and forth along the length direction of the upper X-axis dustproof slideway (402), the upper Y-axis dustproof slideway (403) is arranged along the width direction of the module bracket (300), the upper Y-axis dustproof slideway (403) is fixedly connected to the two upper X-axis sliders, the upper Y-axis driving device (404) is connected to one end of the upper Y-axis dustproof slideway (403), the upper Y-axis slider is arranged on the upper Y-axis dustproof slideway (403), the upper Y-axis driving device (404) drives the upper Y-axis slider to slide back and forth along the length direction of the upper Y-axis dustproof slideway (403), and the upper spray gun device (405) is fixedly connected to the upper Y-axis slider.

5. The device for automatic multi-surface painting of truck doors according to claim 4, characterized in that: The nozzle of the upper spray gun device (405) is arranged to face downward.

6. The device for automatic multi-surface painting of truck doors according to claim 1, characterized in that: The lower spray gun module (500) comprises a lower X-axis driving device (501), a lower Y-axis dustproof slideway (503), a lower Y-axis driving device (504), a lower spray gun device (505) and two lower X-axis dustproof slideways (502), wherein the two lower X-axis dustproof slideways (502) are arranged in parallel along the width direction of the module support (300), and each lower X-axis dustproof slideway (502) is arranged along the length direction of the module support (300), the lower X-axis driving device (501) is respectively connected to one end of the lower X-axis dustproof slideway (502), the lower X-axis dustproof slideway (502) is provided with a lower X-axis slider, and the lower X-axis driving device (501) is arranged on the lower X-axis dustproof slideway (502). The lower X-axis sliders (501) are driven to slide back and forth along the length direction of the lower X-axis dustproof slideway (502), the lower Y-axis dustproof slideway (503) is arranged along the width direction of the module bracket (300), the lower Y-axis dustproof slideway (503) is fixedly connected to the two lower X-axis sliders, the lower Y-axis driving device (504) is connected to one end of the lower Y-axis dustproof slideway (503), the lower Y-axis slider is arranged on the lower Y-axis dustproof slideway (503), the lower Y-axis driving device (504) drives the lower Y-axis slider to slide back and forth along the length direction of the lower Y-axis dustproof slideway (503), and the lower spray gun device (505) is fixedly connected to the lower Y-axis slider.

7. The device for automatic multi-surface painting of truck doors according to claim 6, characterized in that: The nozzle of the lower spray gun device (505) is arranged to face upward.

8. The device for automatic multi-surface painting of truck doors according to claim 1, characterized in that: The lifting mechanism (600) includes a base (601), an upper bracket (605), a lifting cylinder (606) and four guide mechanisms. The base (601) is fixedly connected to the ground inside the module bracket (300). The upper bracket (605) is arranged above the base (601). The lifting cylinder (606) is arranged vertically upward and fixedly connected between the middle part of the lower end surface of the upper bracket (605) and the middle part of the base (601). A guide mechanism is respectively provided between the four corners of the lower end surface of the upper bracket (605) and the base (601).

9. The device for automatic multi-surface painting of truck doors according to claim 8, characterized in that: The guide mechanism comprises a linear bearing (602), a guide column (603) and a guide column clamping mechanism (604); the linear bearing (602) is fixedly connected to the upper end surface of the base (601); the guide column (603) is vertically inserted into the linear bearing (602) and is slidably connected to the linear bearing (602); the upper end of the guide column (603) is fixedly connected to the lower end of the guide column clamping mechanism (604); and the upper end of the guide column clamping mechanism (604) is fixedly connected to the lower end of the upper bracket (605).

10. The device for automatic multi-surface painting of truck doors according to claim 8, characterized in that: The upper bracket (605) includes a bottom frame (6051) and four lifting columns (6052). The upper ends of the four corners of the bottom frame (6051) are respectively vertically fixed with a lifting column (6052). The upper ends of the lifting columns (6052) are vertically fixed with L-shaped support plates (6053). The L-shaped support plates (6053) on both sides of the bottom frame (6051) are opened inward and arranged opposite to each other. The outer sides of the L-shaped support plates (6053) on the same side are fixedly connected by connecting rods (6054). The guide mechanism is arranged below the lifting columns (6052).

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