Self-cleaning device of hot bed platform

Abstract

The invention relates to the technical field of 3D printers, and discloses a hot bed platform self-cleaning device which comprises a bottom frame, a hot bed body is installed in the middle of the upper portion of the bottom frame, and an FDM 3D printing head is arranged above the hot bed body; the hot bed cleaning device can automatically clean a hot bed, manual operation of a user is not needed, so that time and energy of the user are saved, the device can accurately adjust the gap between the scraper and the hot bed, it is ensured that the scraper cannot damage the surface of the hot bed in the cleaning process, the device can automatically or manually adjust the angle of the scraper according to the cleaning condition, and the cleaning efficiency is improved. According to the device, the hot bed is arranged to adapt to waste materials of different sizes and shapes, powder and fine chippings on the hot bed can be effectively treated conveniently, the device can automatically complete cleaning work, and the hot bed cannot move or incline in the cleaning process, so that the problem of secondary positioning can be avoided, the operation complexity of a user can be reduced, and the working efficiency is improved. And the printing efficiency and stability are improved.

Description

Technical Field

[0001] The invention relates to the technical field of 3D printers, in particular to a self-cleaning device for a hot bed platform. Background Art

[0002] The main function of a hot bed in 3D printing is to maintain a certain temperature to prevent the model from warping or deforming due to uneven cooling during the printing process. Since the edges of the molten material cool quickly, it is easy to cause shrinkage and warping. The hot bed slows down this process by heating the printing platform, thereby improving the printing quality and success rate. During the printing process, the hot bed may accumulate various impurities, such as powder, resin residue, plastic debris, etc. If these impurities are not cleaned up in time, they may affect the adhesion and accuracy of the prints in the subsequent printing process, resulting in printing failure or reduced print quality.

[0003] FDM printing process The fused deposition manufacturing (FDM) process was successfully developed by American scholars in 1988. FDM materials are generally thermoplastic materials, such as wax, ABS, nylon, etc. The material is fed in filament form. The material is heated and melted in the nozzle, and the nozzle moves along the cross-sectional contour and filling trajectory of the part, while extruding the molten material, and the material solidifies rapidly and condenses with the surrounding material.

[0004] Currently, users need to manually clean the waste material on the hot bed after each print, which not only increases the labor intensity of users, but also makes the cleaning process more difficult for some materials with strong adhesion. When manually cleaning the surface of the hot bed, it is easy to cause the position of the hot bed to shift or move. If the position of the hot bed changes during the cleaning process, then before the next print starts, the user needs to recalibrate the position of the hot bed to ensure that the distance between the print head and the hot bed is correct. The secondary positioning not only increases the complexity of the user's operation, but may also cause printing failure or reduced print quality due to inaccurate positioning. Summary of the invention

[0005] The object of the present invention is to provide a self-cleaning device for a hot bed platform to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a self-cleaning device for a hot bed platform, comprising a base frame, a hot bed body is installed in the middle of the upper part of the base frame, and an FDM3D printing head is arranged above the hot bed body, a fixed frame is fixed on both sides of the inner wall of the base frame, a screw rod is rotatably connected inside the fixed frame, a motor is fixed to the rear side of the fixed frame, and the output shaft of the motor passes through the interior of the fixed frame and is fixedly connected to the rear end of the screw rod, a moving platform is slidably connected to the rear side of the fixed frame, and the screw rod passes through the moving platform and is slidably connected between the moving platform, and the top of the moving platform is fixed There is a cleaning angle adjustment structure, a cleaning height adjustment structure is fixed to the middle of the top of the cleaning angle adjustment structure, and a connecting block is arranged above the cleaning height adjustment structure, a hot bed cleaning scraper is fixed between the connecting blocks, and the hot bed cleaning scraper is located on the rear side above the hot bed body, and adjustment structures are fixed on the left and right sides of the back of the hot bed cleaning scraper, rotating rollers are movably connected between the adjustment structures, and the surface of the rotating rollers is provided with an adsorption sponge, support plates are fixed to the left and right sides of the rear side of the top of the base frame, a humidifying structure is fixed above the front side of the support plate, and a collection box is fixed on the front side of the base frame.

[0007] Preferably, guide rails are fixed on both left and right sides of the top of the fixed frame, guide blocks are fixed on both left and right sides of the bottom of the movable platform, and the guide rails penetrate the guide blocks and are slidably connected to the guide blocks.

[0008] Preferably, the cleaning angle adjustment structure includes a support, an adjustment plate, a fixed plate, a worm, a first knob, a fixed block, a worm gear and a connecting frame, the support is fixed to the left and right sides of the top of the movable platform, the adjustment plate is placed above the support, the fixed plate is fixed to the front and rear sides of one side of the top of the movable platform, the worm is rotatably connected between the fixed plates, the first knob is rotatably connected to the surface of the rear fixed plate, and the front side of the first knob is fixedly connected to the rear end of the worm, the fixed block is fixed to the top of the movable platform and is located on the left and right sides of the fixed plate, the worm gear is rotatably connected to the top of the fixed block, and the worm gear is meshed with the worm, the connecting frame is fixed to the surface of the worm gear, and one side of the connecting frame is fixedly connected to the top of the adjustment plate.

[0009] Preferably, a fixing pin is movably connected to the back side of the fixing plate at the rear side, and the lower end of the fixing pin passes through the first knob and is slidably connected to the first knob.

[0010] Preferably, the top of the support is semicircular, and the bottom of the adjustment plate matches the contact position of the top surface of the support. The adjustment plate and the support are slidably connected, and scale lines are provided on one side surface of the adjustment plate, and a pointer is provided above the one side surface of the support.

[0011] Preferably, the cleaning height adjustment structure includes a fixed sleeve, a second knob and a threaded rod, the fixed sleeve is fixed to the middle part of the top of the adjustment plate, the second knob is rotatably connected to the top of the fixed sleeve, the threaded rod is penetrated and arranged above the fixed sleeve, and the threaded rod is slidably connected to the inner wall of the fixed sleeve, the threaded rod penetrates the second knob and is threadedly connected to the second knob, and the top of the threaded rod is fixedly connected to the bottom of the connecting block.

[0012] Preferably, a limiting strip is fixed to the bottom of the inner wall of the fixing sleeve, and the limiting strip is arranged in a rectangular shape as a whole. The limiting strip passes through the threaded rod and is slidably connected to the threaded rod.

[0013] Preferably, the positioning structure includes a fixed table, a movable plate and a mini cylinder, the fixed table is fixed on the left and right sides of the back side of the hot bed cleaning scraper, the movable plate is arranged on the rear side of the fixed table, and the movable plate is rotatably connected to the fixed table, the mini cylinder is hinged on the left and right sides of the bottom of the movable plate, the mini cylinder is tilted as a whole, and the output shaft of the mini cylinder is hinged to the bottom of the fixed table, and the rotating roller is rotatably connected to the rear side of the movable plate.

[0014] Preferably, the humidification structure includes a storage box, a small water pump, a connecting pipe and a spray pipe, the storage box is fixed above the front side of the support plate, the small water pump is fixed on the left side of the top of the storage box, and the rear side of the small water pump is connected to the water tank, the connecting pipe is connected to the right side of the small water pump, the spray pipe is fixed above the inside of the storage box, and a plurality of spray holes are provided below the spray pipe, and one end of the connecting pipe passes through the inside of the storage box and is connected to the spray pipe.

[0015] Preferably, the left and right sides of the inner wall of the collection box are inclined, a first cylinder is fixed to the front side of the collection box, an output shaft of the first cylinder passes through the interior of the collection box and is fixed with an extrusion plate, and the extrusion plate is slidably connected to the inner wall of the collection box.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention can automatically clean the hot bed without manual operation by the user, thereby saving the user's time and energy. Automatic cleaning can also ensure the uniformity and consistency of cleaning and improve the cleaning effect. The device can accurately adjust the gap between the scraper and the hot bed to ensure that the scraper will not damage the surface of the hot bed during the cleaning process. Accurate gap adjustment can also improve the cleaning efficiency of the scraper to ensure that the waste is completely removed. Moreover, the device can automatically or manually adjust the angle of the scraper according to the cleaning situation to adapt to waste of different sizes and shapes. Flexible adjustment of the angle can improve the pertinence and efficiency of cleaning and ensure that the surface of the hot bed is thoroughly cleaned. The device is also convenient for effectively processing powder and fine debris on the hot bed. Since the device can automatically complete the cleaning work and will not cause the hot bed to move or tilt during the cleaning process, the problem of secondary positioning can be avoided, which helps to reduce the user's operation complexity and improve printing efficiency and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 A schematic diagram of a three-dimensional structure from another viewing angle of the present invention; Figure 3 is a three-dimensional schematic diagram of the fixing frame in the present invention; Figure 4 is a three-dimensional schematic diagram of another viewing angle of the fixing frame of the present invention; Figure 5 It is a three-dimensional schematic diagram of the cleaning angle adjustment structure in the present invention; Figure 6 For the present invention Figure 5 A partial enlarged view of the middle A; Figure 7 A three-dimensional schematic diagram of the cleaning angle adjustment structure of the present invention from another viewing angle; Figure 8 It is a three-dimensional schematic diagram of the rotating roller in the present invention; Fig. 9 It is a three-dimensional schematic diagram of the positioning structure in the present invention; Fig.10 It is a three-dimensional schematic diagram of the humidification structure in the present invention; Fig.11 It is a three-dimensional schematic diagram of the collection box in the present invention.

[0018] In the figure: 1, base frame; 2, hot bed body; 3, fixed frame; 4, screw rod; 5, motor; 6, moving table; 7, cleaning angle adjustment structure; 71, support table; 72, adjustment plate; 73, fixed sheet; 74, worm; 75, first knob; 76, fixed block; 77, worm gear; 78, connecting frame; 8, cleaning height adjustment structure; 81, fixed sleeve; 82, second knob; 83, threaded rod; 9, connecting block; 10, hot bed cleaning scraper; 11, adjustment Position structure; 111, fixed table; 112, movable plate; 113, mini cylinder; 12, rotating roller; 13, adsorption sponge; 14, support plate; 15, humidification structure; 151, storage box; 152, small water pump; 153, connecting pipe; 154, spray pipe; 16, collection box; 17, guide rail; 18, guide block; 19, scale line; 20, pointer; 21, limit strip; 22, fixing pin; 23, first cylinder; 24, extrusion plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0020] See also Figure 1-11 As shown, a self-cleaning device for a hot bed platform comprises a base frame 1, a hot bed body 2 is installed in the middle above the base frame 1, and an FDM3D printing head is arranged above the hot bed body 2, a fixing frame 3 is fixed on both sides of the inner wall of the base frame 1, a screw rod 4 is rotatably connected inside the fixing frame 3, a motor 5 is fixed on the rear side of the fixing frame 3, and the output shaft of the motor 5 passes through the inside of the fixing frame 3 and is fixedly connected to the rear end of the screw rod 4, a moving platform 6 is slidably connected to the rear side of the fixing frame 3, and the screw rod 4 passes through the moving platform 6 and is slidably connected between the moving platform 6, a cleaning angle adjustment structure 7 is fixed on the top of the moving platform 6, and a cleaning angle adjustment structure 7 is arranged on the top of the moving platform 6. A cleaning height adjustment structure 8 is fixed to the middle of the top of the angle adjustment structure 7, and a connecting block 9 is arranged above the cleaning height adjustment structure 8, a hot bed cleaning scraper 10 is fixed between the connecting blocks 9, and the hot bed cleaning scraper 10 is located on the rear side above the hot bed body 2, and adjustment structures 11 are fixed on the left and right sides of the back of the hot bed cleaning scraper 10, and rotating rollers 12 are movably connected between the adjustment structures 11, and the surface of the rotating rollers 12 is provided with an adsorption sponge 13, support plates 14 are fixed to the left and right sides of the rear side of the top of the base frame 1, a humidifying structure 15 is fixed above the front side of the support plate 14, and a collecting box 16 is fixed to the front side of the base frame 1.

[0021] Guide rails 17 are fixed on the left and right sides of the top of the fixed frame 3, and guide blocks 18 are fixed on the left and right sides of the bottom of the movable platform 6. The guide rails 17 penetrate the guide blocks 18 and are slidably connected with the guide blocks 18. When the motors 5 on both sides are turned on, the output shafts of the motors 5 will drive the screw rod 4 to rotate, thereby causing the movable platform 6 to move on the surface of the screw rod 4. At this time, the guide blocks 18 on both sides also slide on the surface of the guide rails 17. The setting of the guide blocks 18 can improve the stability of the hot bed cleaning scraper 10 when it moves back and forth for cleaning. The scraper can accurately and quickly complete the cleaning task during the cleaning process, while avoiding unnecessary damage to the hot bed platform.

[0022] The cleaning angle adjustment structure 7 includes a support platform 71, an adjustment plate 72, a fixing plate 73, a worm 74, a first knob 75, a fixing block 76, a worm gear 77 and a connecting frame 78. The support platform 71 is fixed to the left and right sides of the top of the movable platform 6, the adjustment plate 72 is placed above the support platform 71, the fixing plate 73 is fixed to the front and rear sides of one side of the top of the movable platform 6, the worm 74 is rotatably connected between the fixing plates 73, the first knob 75 is rotatably connected to the surface of the rear fixing plate 73, and the front side of the first knob 75 is fixedly connected to the rear end of the worm 74, the fixing block 76 is fixed to the top of the movable platform 6 and is located on the left and right sides of the fixing plate 73, the worm gear 77 is rotatably connected to the top of the fixing block 76, and the worm gear 77 is meshed with the worm 74, and the connecting frame 78 is fixed to the worm gear 77 The top of the adjustment plate 72 is fixedly connected to the connecting frame 78, and the back of the rear fixing plate 73 is movably connected with a fixing pin 22, and the lower end of the fixing pin 22 passes through the first knob 75 and is slidably connected with the first knob 75. When the user needs to adjust the cleaning angle of the hot bed cleaning scraper 10, the user first removes the fixing pin 22 on the rear side, thereby allowing the first knob 75 to rotate, and then the user rotates the first knob 75, thereby causing the first knob 75 to drive the worm 74 to rotate, thereby causing the upper worm gear 77 to rotate, and the connecting frame 78 drives the adjusting plate 72 on one side to move, thereby adjusting the cleaning angle of the hot bed cleaning scraper 10 so as to adjust it according to the size of the waste volume on the surface of the hot bed body 2.

[0023] The top of the support 71 is set in a semicircular arc shape, and the bottom of the adjustment plate 72 is matched with the contact position of the top surface of the support 71. The adjustment plate 72 is slidably connected to the support 71. A scale line 19 is set on one side surface of the adjustment plate 72, and a pointer 20 is set above the one side surface of the support 71. When the user adjusts the cleaning angle of the hot bed cleaning scraper 10, the inclination angle of the adjustment plate 72 can be observed through the pointer 20 and the scale line 19, so as to accurately adjust the hot bed cleaning scraper 10.

[0024] The cleaning height adjustment structure 8 includes a fixed sleeve 81, a second knob 82 and a threaded rod 83. The fixed sleeve 81 is fixed to the middle of the top of the adjustment plate 72. The second knob 82 is rotatably connected to the top of the fixed sleeve 81. The threaded rod 83 is arranged above the fixed sleeve 81, and the threaded rod 83 is slidably connected to the inner wall of the fixed sleeve 81. The threaded rod 83 passes through the second knob 82 and is threadedly connected to the second knob 82. The top of the threaded rod 83 is fixedly connected to the bottom of the connecting block 9. The bottom of the inner wall of the fixed sleeve 81 is fixed with a limit strip 21, and the limit strip 2 The overall configuration is rectangular, and the limit bar 21 penetrates through the threaded rod 83 and is slidably connected to the threaded rod 83. When the user rotates the second knobs 82 on the left and right sides, the threaded rod 83 moves up and down, and the limit bar 21 limits the threaded rod 83. The threaded rod 83 that moves up and down pushes the upper connecting block 9, and the connecting block 9 drives the hot bed cleaning scraper 10 to move up and down, ensuring that the gap between the scraper and the surface of the hot bed can be accurately adjusted, thereby avoiding the movement or deformation of the hot bed platform due to excessive or insufficient gap during the cleaning process.

[0025] The positioning structure 11 includes a fixed platform 111, a movable plate 112 and a mini cylinder 113. The fixed platform 111 is fixed on the left and right sides of the back side of the hot bed cleaning scraper 10. The movable plate 112 is arranged on the rear side of the fixed platform 111, and the movable plate 112 is rotatably connected to the fixed platform 111. The mini cylinder 113 is hinged on the left and right sides of the bottom of the movable plate 112. The mini cylinder 113 is arranged tilted as a whole, and the output shaft of the mini cylinder 113 is hinged to the bottom of the fixed platform 111. The rotating roller 12 is rotatably connected to the rear side of the movable plate 112. When the user uses the hot bed cleaning scraper 10 to clean the surface of the hot bed, the user can open the mini cylinder 113 under the movable plate 112 to control the output shaft of the mini cylinder 113 to retract, thereby causing the movable plate 112 to rotate as a whole, thereby causing the adsorption sponge 13 to adhere to the surface of the top of the hot bed body 2, and the powder or fine debris on the surface of the hot bed body 2 is adsorbed and cleaned by the adsorption sponge 13, thereby improving the cleaning effect of the hot bed.

[0026] The humidification structure 15 includes a storage box 151, a small water pump 152, a connecting pipe 153 and a spraying pipe 154. The storage box 151 is fixed above the front side of the support plate 14, the small water pump 152 is fixed to the left side of the top of the storage box 151, and the rear side of the small water pump 152 is connected to the water tank, the connecting pipe 153 is connected to the right side of the small water pump 152, the spraying pipe 154 is fixed above the inside of the storage box 151, and a plurality of spraying holes are opened below the spraying pipe 154, and one end of the connecting pipe 153 passes through to The interior of the storage box 151 is connected to the spray pipe 154. Before the user performs cleaning work, the user can manipulate the hot bed cleaning scraper 10 to move backward so that the rotating roller 12 enters the interior of the storage box 151. Then the user turns on the small water pump 152, and water enters the interior of the spray pipe 154 through the connecting pipe 153. The water mist is sprayed on the surface of the adsorption sponge 13 below to moisten the adsorption sponge 13. When the water molecules penetrate into the pores of the sponge, they form a thin layer of water film on the pore surface. This layer of water film has strong wettability and adhesion, and can effectively absorb the surrounding fine dust and debris.

[0027] The left and right sides of the inner wall of the collecting box 16 are inclined, and a first cylinder 23 is fixed to the front side of the collecting box 16. The output shaft of the first cylinder 23 penetrates into the interior of the collecting box 16 and is fixed with a squeezing plate 24. The squeezing plate 24 is slidably connected to the inner wall of the collecting box 16. When the hot bed cleaning scraper 10 scrapes the waste on the surface of the hot bed body 2 into the interior of the collecting box 16, the waste is guided by the inclined inner walls on both sides of the collecting box 16 to gather in the middle of the collecting box 16. After the user opens the first cylinder 23, the output shaft of the first cylinder 23 pushes the squeezing plate 24 to move backward, thereby squeezing the waste inside the collecting box 16 so that the user can subsequently perform unified cleaning or waste recycling.

[0028] Working principle: After the user has used the 3D printer, a certain amount of waste remains on the surface of the top of the hot bed body 2 and needs to be cleaned by the user. At this time, the user first moves the hot bed body 2 forward to make the hot bed body 2 close to the collection box 16, and then turns on the motors 5 on both sides and the small water pump 152 at the rear, so that the moving platform 6 drives the hot bed cleaning scraper 10 above to move. When the hot bed cleaning scraper 10 moves, the user turns on the mini cylinder 113, so that the adsorption sponge 13 is attached to the surface of the hot bed body 2, and the hot bed cleaning scraper 10 automatically cleans the waste on the surface of the hot bed body 2 to the inside of the collection box 16, and the wetted adsorption sponge 13 can remove powder and fine particles. The debris is adsorbed to complete the self-cleaning operation on the surface of the hot bed body 2. In daily use, the user can accurately adjust the gap between the hot bed cleaning scraper 10 and the hot bed body 2 by rotating the second knobs 82 on both sides. When cleaning large waste materials, the user can rotate the first knob 75 to make the hot bed cleaning scraper 10 flip backward, and the hot bed cleaning scraper 10 remains in an inclined state to quickly clean the waste on the surface of the hot bed body 2. When the waste on the surface of the hot bed body 2 enters the collecting box 16, the user can open the first cylinder 23 to make the squeezing plate 24 squeeze the waste materials so that the subsequent user can uniformly process the waste materials.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning device for a hot bed platform, comprising a base frame (1), characterized in that: A hot bed body (2) is installed in the middle of the upper part of the base frame (1), and an FDM 3D printing head is arranged above the hot bed body (2); a fixed frame (3) is fixed on both the left and right sides of the inner wall of the base frame (1); a screw rod (4) is rotatably connected inside the fixed frame (3); a motor (5) is fixed on the rear side of the fixed frame (3); an output shaft of the motor (5) passes through the interior of the fixed frame (3) and is fixedly connected to the rear end of the screw rod (4); a moving platform (6) is slidably connected to the rear side of the interior of the fixed frame (3); the screw rod (4) passes through the moving platform (6) and is slidably connected to the moving platform (6); a cleaning angle adjustment structure (7) is fixed on the top of the moving platform (6); A cleaning height adjustment structure (8) is fixed to the middle of the top of the cleaning angle adjustment structure (7), and a connecting block (9) is arranged above the cleaning height adjustment structure (8); a hot bed cleaning scraper (10) is fixed between the connecting blocks (9), and the hot bed cleaning scraper (10) is located at the rear side above the hot bed body (2); positioning structures (11) are fixed to the left and right sides of the back of the hot bed cleaning scraper (10); rotating rollers (12) are movably connected between the positioning structures (11); an adsorption sponge (13) is sleeved on the surface of the rotating roller (12); support plates (14) are fixed to the left and right sides of the rear side of the top of the base frame (1); a humidifying structure (15) is fixed above the front side of the support plate (14); and a collection box (16) is fixed to the front side of the base frame (1).

2. The self-cleaning device for a hot bed platform according to claim 1, characterized in that: Guide rails (17) are fixed on both left and right sides of the top of the fixed frame (3), and guide blocks (18) are fixed on both left and right sides of the bottom of the movable platform (6). The guide rails (17) penetrate the guide blocks (18) and are slidably connected to the guide blocks (18).

3. The self-cleaning device for a hot bed platform according to claim 1, characterized in that: The cleaning angle adjustment structure (7) comprises a support platform (71), an adjustment plate (72), a fixing plate (73), a worm (74), a first knob (75), a fixing block (76), a worm gear (77) and a connecting frame (78), wherein the support platform (71) is fixed to the left and right sides of the top of the moving platform (6), the adjustment plate (72) is placed above the support platform (71), the fixing plate (73) is fixed to the front and rear sides of one side of the top of the moving platform (6), the worm (74) is rotatably connected between the fixing plates (73), and the first The knob (75) is rotatably connected to the surface of the rear fixing plate (73), and the front side of the first knob (75) is fixedly connected to the rear end of the worm (74); the fixing block (76) is fixed to the top of the moving platform (6) and is located on the left and right sides of the fixing plate (73); the worm gear (77) is rotatably connected to the top of the fixing block (76), and the worm gear (77) is meshed with the worm (74); the connecting frame (78) is fixed to the surface of the worm gear (77), and one side of the connecting frame (78) is fixedly connected to the top of the adjustment plate (72).

4. The self-cleaning device for a hot bed platform according to claim 3, characterized in that: A fixing pin (22) is movably connected to the back side of the fixing plate (73) at the rear side, and the lower end of the fixing pin (22) passes through the first knob (75) and is slidably connected to the first knob (75).

5. The self-cleaning device for a hot bed platform according to claim 3, characterized in that: The top of the support platform (71) is arranged in a semicircular arc shape, and the bottom of the adjustment plate (72) is matched with the contact position of the top surface of the support platform (71), the adjustment plate (72) and the support platform (71) are slidably connected, a scale line (19) is arranged on one side surface of the adjustment plate (72), and a pointer (20) is arranged above the one side surface of the support platform (71).

6. The self-cleaning device for a hot bed platform according to claim 3, characterized in that: The cleaning height adjustment structure (8) comprises a fixing sleeve (81), a second knob (82) and a threaded rod (83); the fixing sleeve (81) is fixed to the middle of the top of the adjustment plate (72); the second knob (82) is rotatably connected to the top of the fixing sleeve (81); the threaded rod (83) is arranged to penetrate above the fixing sleeve (81), and the threaded rod (83) is slidably connected to the inner wall of the fixing sleeve (81); the threaded rod (83) penetrates the second knob (82) and is threadedly connected to the second knob (82); and the top of the threaded rod (83) is fixedly connected to the bottom of the connection block (9).

7. The self-cleaning device for a hot bed platform according to claim 6, characterized in that: A limiting strip (21) is fixed to the bottom of the inner wall of the fixing sleeve (81), and the limiting strip (21) is arranged in a rectangular shape as a whole. The limiting strip (21) passes through the threaded rod (83) and is slidably connected to the threaded rod (83).

8. The self-cleaning device for a hot bed platform according to claim 1, characterized in that: The positioning structure (11) comprises a fixed platform (111), a movable plate (112) and a mini cylinder (113); the fixed platform (111) is fixed to the left and right sides of the back of the hot bed cleaning scraper (10); the movable plate (112) is arranged at the rear side of the fixed platform (111), and the movable plate (112) and the fixed platform (111) are rotatably connected; the mini cylinder (113) is hinged to the left and right sides of the bottom of the movable plate (112); the mini cylinder (113) is arranged in an inclined manner as a whole, and the output shaft of the mini cylinder (113) is hinged to the bottom of the fixed platform (111); and the rotating roller (12) is rotatably connected to the rear side of the movable plate (112).

9. The self-cleaning device for a hot bed platform according to claim 1, characterized in that: The humidifying structure (15) comprises a storage box (151), a small water pump (152), a connecting pipe (153) and a spraying pipe (154); the storage box (151) is fixed above the front side of the support plate (14); the small water pump (152) is fixed to the left side of the top of the storage box (151), and the rear side of the small water pump (152) is connected to the water tank; the connecting pipe (153) is connected to the right side of the small water pump (152); the spraying pipe (154) is fixed above the inside of the storage box (151), and a plurality of spraying holes are provided below the spraying pipe (154); one end of the connecting pipe (153) passes through the inside of the storage box (151) and is connected to the spraying pipe (154).

10. The self-cleaning device for a hot bed platform according to claim 1, characterized in that: The left and right sides of the inner wall of the collection box (16) are both arranged in an inclined manner. A first cylinder (23) is fixed to the front side of the collection box (16). The output shaft of the first cylinder (23) penetrates into the interior of the collection box (16) and is fixed with a squeezing plate (24). The squeezing plate (24) is slidably connected to the inner wall of the collection box (16).

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