A kind of vehicle ventilation pipe inner wall anti-condensation coating spraying device

Abstract

This utility model discloses a spraying device for an anti-condensation coating on the inner wall of an automotive ventilation duct, belonging to the technical field of automotive ventilation ducts. Its key technical features include a workbench, a duct shifting component for moving the duct as a whole on the top surface of the workbench, a duct stretching component above the duct shifting component, and a duct rotating component for rotating the duct on the top surface of the workbench. This utility model uses the duct stretching component to flatten the folded parts of the corrugated ventilation duct, completely exposing the previously hard-to-reach folded inner wall. Combined with the duct rotating component to make the duct rotate at a uniform speed, and the duct shifting component to move the duct relative to the nozzle at a uniform speed, this achieves uniform spraying of the nozzle onto the inner wall of the ventilation duct without dead angles or blind spots, fundamentally avoiding the risk of localized condensation caused by uneven spraying or missed areas, and greatly improving the anti-condensation performance and reliability of the product.

Description

Technical Field

[0001] This utility model belongs to the field of automotive ventilation pipe technology, specifically relating to a spraying device for applying an anti-condensation coating to the inner wall of an automotive ventilation pipe. Background Technology

[0002] In automotive air conditioning systems, ventilation ducts (HVAC ducts) are key components that deliver regulated air to various parts of the vehicle. They are typically made of lightweight plastics (such as PP and ABS) or composite materials. To accommodate the confined space inside the vehicle, flexible and retractable corrugated pipes are often used. Under cooling conditions, the low-temperature air flowing through the ducts causes the pipe wall temperature to drop below the dew point of the ambient air. This results in condensation when the warm, humid air from outside comes into contact with the cold pipe wall. The condensate on the inner surface of the pipe wall can not only breed mold and produce odors, affecting the air quality and driving comfort inside the vehicle, but in severe cases, it may also drip onto interior parts or electronic devices, causing safety hazards such as corrosion and short circuits.

[0003] A search revealed Chinese patent CN220320536U, which discloses a high-efficiency plastic ventilation duct for automobiles, including a corrugated pipe, which is the overall structure of this solution; and connectors located at both ends of the corrugated pipe. However, existing spraying devices do not easily cover the inside of the corrugated pipe completely. Utility Model Content

[0004] The purpose of this invention is to provide a spraying device for applying an anti-condensation coating to the inner wall of a vehicle ventilation duct, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a spraying device for anti-condensation coating on the inner wall of a vehicle ventilation pipe, comprising a workbench, a pipe moving component for moving the pipe as a whole is provided on the top surface of the workbench, a pipe stretching component is provided above the pipe moving component, and a pipe rotating component for rotating the pipe is provided on the top surface of the workbench. The pipe stretching assembly includes a moving platform disposed above the pipe moving assembly. A second motor is mounted on the top surface of the moving platform. The output shaft of the second motor is fixedly connected to a bidirectional lead screw via a coupling. Two connecting blocks are symmetrically threaded onto the surface of the bidirectional lead screw via a threaded cylinder. Two positioning frames are symmetrically disposed on the top surface of each connecting block, and the two ends of the ventilation pipe are respectively disposed between the two positioning frames.

[0006] Preferably, the top surface of the mobile platform is symmetrically and fixedly connected to two second guide rails, the connecting block is slidably connected to the two second guide rails via a slider, the top surface of each connecting block is fixedly connected to a fourth guide rail, and the two positioning frames located on the same side are slidably connected to the corresponding fourth guide rails via a slider.

[0007] Preferably, each positioning frame has a slidably connected insertion rod on its surface, and each positioning frame has a spring on its bottom surface. The two ends of each spring are fixedly connected to the corresponding positioning frame and the insertion rod, respectively. Positioning holes are opened at the positions of the connecting block and the insertion rod.

[0008] Preferably, each positioning frame has a limiting groove inside, each limiting groove has a positioning rubber wheel inside, and each positioning frame has a sliding groove evenly and symmetrically arranged inside. Every two sliding grooves with the same axis are located on both sides of one of the limiting grooves and communicate with each other. The two positioning shafts located on both sides of the positioning rubber wheel are inserted into the corresponding sliding grooves and are slidably connected to the positioning frame through the sliding grooves.

[0009] Preferably, the two positioning frames are corresponding semi-circular arc shapes, and each positioning frame has three grooves evenly distributed on its surface.

[0010] Preferably, the pipe moving assembly includes a first motor installed on the bottom surface of the workbench, the output shaft of the first motor is fixedly connected to a first lead screw via a coupling, the moving platform is threadedly connected to the first lead screw via a threaded cylinder, two third guide rails are symmetrically fixedly connected to the top surface of the workbench, and the moving platform is slidably connected to the third guide rails via a slider, a support frame is fixedly connected to the top surface of the workbench, and a nozzle is fixedly connected to one end of the support frame near the ventilation pipe.

[0011] Preferably, the pipe rotation assembly includes a first guide rail fixedly connected to the top surface of the workbench, a positioning frame slidably connected to the surface of the first guide rail via a slider, the positioning frame being fixedly connected to one of the connecting blocks, an electric push rod being mounted on the top surface of the positioning frame, a force-applying rod being fixedly connected to the push rod of the electric push rod, and the force-applying rod engaging with the corresponding positioning rubber wheel.

[0012] Preferably, the bottom surface of the force-applying rod is fixedly connected to a friction-enhancing mechanism, and the friction-enhancing mechanism is made of rubber, with the side near the positioning rubber wheel being wavy.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses a pipe stretching component to stretch and flatten the folded parts of the corrugated ventilation pipe, completely exposing the previously hard-to-reach inner wall of the folds; combined with a pipe rotating component to make the pipe rotate at a uniform speed, and a pipe moving component to move the pipe at a uniform speed relative to the nozzle, it achieves uniform spraying of the nozzle onto the inner wall of the ventilation pipe without dead angles and with full coverage, fundamentally avoiding the risk of local condensation caused by uneven spraying and missed coating, and greatly improving the anti-condensation performance and reliability of the product.

[0014] 2. This utility model uses a motor and electric push rod to drive the clamping, stretching, axial movement, and rotation of the pipe, which are all driven by the motor and electric push rod. It has a high degree of automation and replaces the traditional manual hand-held spraying operation mode. It not only reduces labor intensity, but also maintains stable and consistent process parameters, significantly reducing the processing time of a single product. It is very suitable for the mass production and assembly line production of automotive ventilation pipes, effectively improving production efficiency and capacity.

[0015] 3. The present invention, through the combination structure of positioning frame, sliding groove and positioning rubber wheel in the device design, can penetrate into the folds of the corrugated pipe for limiting, and provides multi-point and multi-directional clamping force to ensure that the pipe will not slip or deviate during stretching, rotation and movement. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the positioning frame and electric push rod structure of this utility model; Figure 3 This is a schematic diagram of the first motor and the first lead screw structure of this utility model; Figure 4 This is a schematic diagram of the vertical cross-sectional structure of the positioning frame of this utility model; Figure 5 This utility model Figure 2 Enlarged view of point A in the middle.

[0017] In the diagram: 1. Workbench; 2. First motor; 3. First lead screw; 4. Moving table; 5. First guide rail; 6. Support frame; 7. Nozzle; 8. Second motor; 9. Bidirectional lead screw; 10. Second guide rail; 11. Third guide rail; 12. Connecting block; 13. Fourth guide rail; 14. Positioning rubber wheel; 15. Spring; 16. Insert rod; 17. Positioning frame; 18. Slide groove; 19. Force rod; 20. Positioning frame; 21. Electric push rod. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-5This utility model provides a spraying device for anti-condensation coating on the inner wall of a vehicle ventilation pipe, including a workbench 1, a pipe moving component for moving the pipe as a whole is provided on the top surface of the workbench 1, a pipe stretching component is provided above the pipe moving component, and a pipe rotating component for rotating the pipe is provided on the top surface of the workbench 1. The pipe stretching assembly includes a movable platform 4 positioned above the pipe moving assembly. A second motor 8 is mounted on the top surface of the movable platform 4. The output shaft of the second motor 8 is fixedly connected to a bidirectional lead screw 9 via a coupling. Two connecting blocks 12 are symmetrically threaded onto the surface of the bidirectional lead screw 9 via threaded cylinders. Two positioning frames 17 are symmetrically arranged on the top surface of each connecting block 12, and the two ends of the ventilation pipe are respectively positioned between the two positioning frames 17. Two second guide rails 10 are symmetrically fixedly connected to the top surface of the movable platform 4. The connecting blocks 12 are slidably connected to the two second guide rails 10 via sliders. A fourth guide rail 13 is fixedly connected to the top surface of each connecting block 12, located on the same... The two positioning frames 17 on the side are slidably connected to the corresponding fourth guide rail 13 via sliders. When it is necessary to spray the inside of the corrugated ventilation pipe, the two ends of the corrugated ventilation pipe are first placed between the two sets of positioning frames 17, and then the two positioning frames 17 in the same set are slid on the surface of the fourth guide rail 13 so that the two sets of positioning frames 17 limit the two ends of the corrugated ventilation pipe. Then the second motor 8 is connected to the external power supply and started. The two connecting blocks 12 will move away from each other due to the rotation of the bidirectional screw 9, thereby stretching the corrugated ventilation pipe and stretching the wrinkles inside the corrugated ventilation pipe to flatten them, so as to facilitate the spraying of the inner wall of the corrugated ventilation pipe.

[0020] In this embodiment, each positioning frame 17 has a sliding rod 16 connected to its surface, and each positioning frame 17 has a spring 15 on its bottom surface. The two ends of each spring 15 are fixedly connected to the corresponding positioning frame 17 and the rod 16, respectively. The connecting block 12 has a positioning hole at the position corresponding to the rod 16. When the two positioning frames 17 are combined, the rod 16 will be inserted into the positioning hole due to the elastic potential energy of the spring 15, thereby positioning the two positioning frames 17.

[0021] In this embodiment, each positioning frame 17 has a limiting groove inside, and each limiting groove is equipped with a positioning rubber wheel 14. Each positioning frame 17 has a uniformly symmetrically arranged sliding groove 18 inside. Every two sliding grooves 18 with the same axis are located on both sides of one of the limiting grooves and are interconnected with the limiting groove. The two positioning shafts located on both sides of the positioning rubber wheel 14 are inserted into the corresponding sliding grooves 18 and are slidably connected to the positioning frame 17 through the sliding grooves 18. The two positioning frames 17 are semi-circular arc shapes corresponding to each other, and three sliding grooves 18 are uniformly arranged on the surface of each positioning frame 17. When the two positioning frames 17 are merged, several sliding grooves 18 will be inserted into the folds of the corrugated ventilation pipe, thereby strengthening the limiting of both ends of the corrugated ventilation pipe. The rotation of the sliding grooves 18 can facilitate the rotation of the corrugated ventilation pipe, making the corrugated ventilation pipe rotate smoothly while stabilizing it.

[0022] In this embodiment, the pipe moving assembly includes a first motor 2 installed on the bottom surface of the workbench 1. The output shaft of the first motor 2 is fixedly connected to a first lead screw 3 via a coupling. The moving platform 4 is threadedly connected to the first lead screw 3 via a threaded cylinder. Two third guide rails 11 are symmetrically fixedly connected to the top surface of the workbench 1, and the moving platform 4 is slidably connected to the third guide rails 11 via a slider. A support frame 6 is fixedly connected to the top surface of the workbench 1. A nozzle 7 is fixedly connected to one end of the support frame 6 near the ventilation pipe. In order for the nozzle 7 to spray the inner wall of the corrugated pipe completely, the first motor 2 is connected to an external power source and started. The moving platform 4 will slide on the surface of the third guide rails 11 due to the rotation of the first lead screw 3, thereby indirectly driving the corrugated ventilation pipe to move. This allows the nozzle 7 to move correspondingly inside the corrugated ventilation pipe, resulting in a larger spraying area.

[0023] In this embodiment, the pipe rotation assembly includes a first guide rail 5 fixedly connected to the top surface of the workbench 1. A positioning frame 20 is slidably connected to the surface of the first guide rail 5 via a slider. The positioning frame 20 is fixedly connected to one of the connecting blocks 12. An electric push rod 21 is mounted on the top surface of the positioning frame 20. A force-applying rod 19 is fixedly connected to the push rod of the electric push rod 21. The force-applying rod 19 is in contact with a corresponding positioning rubber wheel 14. A friction-enhancing mechanism is fixedly connected to the bottom surface of the force-applying rod 19. The friction-enhancing mechanism is made of rubber and has an open side near the positioning rubber wheel 14. Designed as a wave shape, when the connecting block 12 moves, it will drive the electric push rod 21 to slide synchronously on the surface of the first guide rail 5 through the positioning frame 20. When it is necessary to rotate the corrugated ventilation pipe, the electric push rod 21 is connected to an external power source and then started. The force rod 19 will rotate the positioning rubber wheel 14 due to the reciprocating movement of the push rod and the friction force. The positioning rubber wheel 14 drives the corrugated ventilation pipe to rotate inside the two positioning frames 17, thereby making the corrugated ventilation pipe rotate inside the two positioning frames 17, which facilitates the comprehensive spraying of the inner wall of the corrugated ventilation pipe.

[0024] It should be noted that in this application, the motor is a servo motor with an encoder, and the number of rotations and rotation angle of the motor output shaft are controllable and highly accurate. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0025] It should be noted that in this application, the electric push rod can be used in conjunction with a magnetic switch, a proximity switch or a photoelectric switch to achieve precise control of the push rod's extension and retraction displacement. Those skilled in the art can set it according to actual needs, which will not be elaborated here.

[0026] The use of this utility model involves the following steps: S1: When it is necessary to spray the inside of the corrugated ventilation pipe, first place the two ends of the corrugated ventilation pipe between the two sets of positioning frames 17 respectively, and then slide the two positioning frames 17 of the same set on the surface of the fourth guide rail 13 so that the two sets of positioning frames 17 limit the two ends of the corrugated ventilation pipe. Then connect the second motor 8 to the external power supply and start it. The two connecting blocks 12 will move away from each other due to the rotation of the bidirectional screw 9, thereby stretching the corrugated ventilation pipe and stretching the wrinkles inside the corrugated ventilation pipe to flatten them, so as to facilitate the spraying of the inner wall of the corrugated ventilation pipe. S2: When the two positioning frames 17 are merged, several sliding grooves 18 will be inserted into the folds of the corrugated ventilation pipe, thereby strengthening the limiting of both ends of the corrugated ventilation pipe. The rotation of the sliding grooves 18 can facilitate the rotation of the corrugated ventilation pipe, making the corrugated ventilation pipe rotate smoothly while stabilizing it. S3: In order for the nozzle 7 to fully spray the inner wall of the corrugated pipe, the first motor 2 is connected to an external power source and started. The moving table 4 will slide on the surface of the third guide rail 11 due to the rotation of the first lead screw 3, thereby indirectly driving the corrugated ventilation pipe to move, so that the nozzle 7 moves accordingly inside the corrugated ventilation pipe, resulting in a larger spraying range. S4: When the connecting block 12 moves, it will drive the electric push rod 21 to slide synchronously on the surface of the first guide rail 5 through the positioning frame 20. When it is necessary to rotate the corrugated ventilation pipe, the electric push rod 21 is connected to the external power supply and then started. The force rod 19 will rotate the positioning rubber wheel 14 due to the reciprocating movement of the push rod. The positioning rubber wheel 14 drives the corrugated ventilation pipe to rotate inside the two positioning frames 17, thereby making the corrugated ventilation pipe rotate inside the two positioning frames 17, which facilitates the comprehensive spraying of the inner wall of the corrugated ventilation pipe.

[0027] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change. The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs. The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A spraying device for applying an anti-condensation coating to the inner wall of a vehicle ventilation duct, comprising a workbench (1), characterized in that: The top surface of the workbench (1) is provided with a pipe moving component for moving the pipe as a whole, a pipe stretching component is provided above the pipe moving component, and a pipe rotating component for rotating the pipe is provided on the top surface of the workbench (1). The pipe stretching assembly includes a moving platform (4) disposed above the pipe moving assembly. A second motor (8) is mounted on the top surface of the moving platform (4). The output shaft of the second motor (8) is fixedly connected to a bidirectional lead screw (9) via a coupling. Two connecting blocks (12) are symmetrically connected to the surface of the bidirectional lead screw (9) via a threaded cylinder. Two positioning frames (17) are symmetrically disposed on the top surface of each connecting block (12), and the two ends of the ventilation pipe are respectively disposed between the two positioning frames (17).

2. The device for spraying an anti-condensation coating on the inner wall of a vehicle ventilation duct according to claim 1, characterized in that: The top surface of the mobile platform (4) is symmetrically and fixedly connected to two second guide rails (10). The connecting block (12) is slidably connected to the two second guide rails (10) through a slider. The top surface of each connecting block (12) is fixedly connected to a fourth guide rail (13). The two positioning frames (17) located on the same side are slidably connected to the corresponding fourth guide rails (13) through a slider.

3. The device for spraying an anti-condensation coating on the inner wall of a vehicle ventilation duct according to claim 1, characterized in that: Each of the positioning frames (17) has a slidably connected rod (16) on its surface, and each of the positioning frames (17) has a spring (15) on its bottom surface. The two ends of each spring (15) are fixedly connected to the corresponding positioning frame (17) and the rod (16) respectively. The connecting block (12) has a positioning hole at the position corresponding to the rod (16).

4. The device for spraying an anti-condensation coating on the inner wall of a vehicle ventilation duct according to claim 1, characterized in that: Each of the positioning frames (17) has a limiting groove inside, and each of the limiting grooves is provided with a positioning rubber wheel (14). Each of the positioning frames (17) has a sliding groove (18) evenly and symmetrically arranged inside. Every two sliding grooves (18) with the same axis are located on both sides of one of the limiting grooves and are interconnected with the limiting groove. The two positioning shafts located on both sides of the positioning rubber wheel (14) are inserted into the corresponding sliding groove (18) and are slidably connected to the positioning frame (17) through the sliding groove (18).

5. The device for spraying an anti-condensation coating on the inner wall of a vehicle ventilation duct according to claim 1, characterized in that: The two positioning frames (17) are semi-circular arc shapes corresponding to each other, and three grooves (18) are evenly provided on the surface of each positioning frame (17).

6. The device for spraying an anti-condensation coating on the inner wall of a vehicle ventilation duct according to claim 1, characterized in that: The pipe moving assembly includes a first motor (2) installed on the bottom surface of the workbench (1). The output shaft of the first motor (2) is fixedly connected to a first lead screw (3) via a coupling. The moving platform (4) is threadedly connected to the first lead screw (3) via a threaded cylinder. Two third guide rails (11) are symmetrically fixedly connected to the top surface of the workbench (1), and the moving platform (4) is slidably connected to the third guide rails (11) via a slider. A support frame (6) is fixedly connected to the top surface of the workbench (1), and a nozzle (7) is fixedly connected to one end of the support frame (6) near the ventilation pipe.

7. The device for spraying an anti-condensation coating on the inner wall of a vehicle ventilation duct according to claim 4, characterized in that: The pipe rotation assembly includes a first guide rail (5) fixedly connected to the top surface of the workbench (1). A positioning frame (20) is slidably connected to the surface of the first guide rail (5) via a slider. The positioning frame (20) is fixedly connected to one of the connecting blocks (12). An electric push rod (21) is installed on the top surface of the positioning frame (20). A force-applying rod (19) is fixedly connected to the push rod of the electric push rod (21). The force-applying rod (19) is in contact with the corresponding positioning rubber wheel (14).

8. The anti-condensation coating spraying device for the inner wall of a vehicle ventilation duct according to claim 7, characterized in that: The bottom surface of the force-applying rod (19) is fixedly connected to a friction-enhancing mechanism, which is made of rubber and has a wave-shaped opening on the side near the positioning rubber wheel (14).

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