A type of air knife cleaning equipment

Abstract

The present application relates to a wind knife cleaning device, including a wind knife device and a walking device, the walking device is used to drive the wind knife device to move forward and backward; the wind knife device includes a fitted wind knife front plate and a wind knife rear plate, a wind cavity is provided between the wind knife front plate and the wind knife rear plate, a first air inlet is provided on one side of the wind knife rear plate, the first air inlet is connected to the wind cavity, an air outlet is provided at the lower part of the wind cavity, the local height of the air outlet gradually increases from the direction away from the walking device, the length direction of the air outlet is perpendicular to the moving direction of the wind knife device, and the width of the air outlet is less than 1mm. The present application can blow dust to the outside of the workpiece by obliquely setting the linear air outlet with a width of less than 1mm of the wind knife device outward, avoiding the dust from falling back to the surface of the workpiece for a second time, and with the centralized wind force, the cleaning force is strong and the cleaning effect is high.

Description

Technical Field

[0001] The present application relates to the field of screen cleaning, and in particular to an air knife cleaning device. Background Art

[0002] Light-shielding tape can be used to fix LCD and backlight modules of electronic devices, and has the functions of light shielding, scratch prevention, protection, and fingerprint prevention. The screen needs to be cleaned before attachment. Wiping with a dust-free cloth can easily scratch the screen surface, and washing with water can easily damage the screen LCD. However, the existing vacuuming or blowing equipment cannot meet the requirements of high-efficiency production due to the scattered dust removal force. Summary of the invention

[0003] In order to solve the above problems, the present application provides an air knife cleaning device.

[0004] In order to achieve the above purpose, the present application provides an air knife cleaning device, which adopts the following technical solution:

[0005] A wind knife cleaning device includes a wind knife device and a walking device, the walking device is used to drive the wind knife device to move forward and backward; the wind knife device includes a fitted wind knife front plate and a wind knife rear plate, a wind cavity is provided between the wind knife front plate and the wind knife rear plate, a first air inlet is provided on one side of the wind knife rear plate, the first air inlet is connected to the wind cavity, an air outlet is provided at the lower part of the air cavity, the local height of the air outlet gradually increases from the direction away from the walking device, the length direction of the air outlet is perpendicular to the moving direction of the wind knife device, and the width of the air outlet is less than 1 mm.

[0006] By adopting the above technical solution, the straight-line wind knife device is more convenient to be used in assembly line operations. When in use, it is directly set on the side of the conveyor belt of the workpiece. The wind knife device composed of the wind knife front plate and the wind knife rear plate has a simple structure and is easy to assemble. The wind knife device has an air outlet that is set obliquely outward, which can blow dust to the outside of the workpiece to prevent dust from falling back to the surface of the workpiece for the second time, thereby improving the cleaning effect. The linear air outlet with a width of less than 1mm can maximize the concentrated wind force and enhance the cleaning effect.

[0007] Preferably, a negative pressure dust collection device is provided on the upper part of the wind knife device.

[0008] By adopting the above technical solution, after the wind knife device blows the dust into the air, the negative pressure dust collecting device effectively recovers the dust to avoid secondary falling back, thereby improving the cleaning effect.

[0009] Preferably, a lifting device is included, and the walking device is arranged on the lifting part of the lifting device.

[0010] By adopting the above technical solution, the lifting device can control the distance between the wind knife device and the workpiece surface, and increase the wind force on the workpiece surface under the same wind inlet strength, so as to blow away stubborn dust. Furthermore, the distance between the negative pressure dust collection device and the workpiece surface is also reduced, so that the dust can be sucked away immediately to prevent it from falling back and improve the cleaning effect.

[0011] Preferably, the wind cavity is provided with a long strip partition arranged along the length direction of the wind cavity, the partition is divided into a rotating plate and an extension part, the upper part of the rotating plate is hinged to the wind cavity, the lower part of the rotating plate is connected to the upper part of the extension part, the lower part of the extension part is connected to the wind cavity, a plurality of blocking columns are provided on one side of the rotating plate, and a plurality of threaded pressure rods are provided on the other side of the rotating plate, the threaded pressure rods pass through the threaded holes provided in the wind cavity and are connected to the external knobs.

[0012] By adopting the above technical solution, the rotating knob can drive the threaded pressure rod to squeeze or release the rotating plate, thereby controlling the local volume of the air cavity and achieving the effect of regulating the local wind force of the wind knife device.

[0013] Preferably, a long strip-shaped slide plate and bolts are provided in the air cavity. The slide plate is arranged along the length direction of the air cavity. A long strip groove is provided on the side wall of the air cavity. The bolt screw passes through the slide plate and the long strip groove and is fastened with an external nut.

[0014] By adopting the above technical scheme, according to the arrangement of the workpieces on the conveyor belt, the nut is loosened and the bolt is pulled to move the slide plate downward, and then the nut is re-tightened, and the air outlet corresponding to the gap between adjacent workpieces is blocked with the lower part of the slide plate, thereby improving the wind force concentration of the wind knife device, reducing the dust falling back caused by the wind knife device blowing up dust on the conveyor belt or the surface of the frame other than the workpiece, and improving the cleaning effect.

[0015] Preferably, an ion wind inlet is provided on the upper portion of the wind knife device.

[0016] By adopting the above technical solution, a high-pressure ion airflow with positive and negative charges is introduced to remove dust and static electricity on the surface of the component, thereby improving the cleaning effect.

[0017] Preferably, the walking device includes a frame, a cylinder and a bracket, the cylinder is arranged on the frame, and the bracket is fixed to the moving part of the cylinder; a connecting seat is provided at the lower part of the bracket, a rotating rod is passed through the connecting seat, a fixing block is partially provided at the rotating rod, and the fixing block is fixed to the upper part of the wind knife device; a transmission box is provided at the lower part of the bracket, one end of the rotating rod is connected to the output shaft of the transmission box, a transmission gear is provided at the end of the input shaft of the transmission box, and the frame is provided with a rack, which is used for meshing transmission when the transmission gear moves.

[0018] By adopting the above technical solution, when the wind knife device passes through the workpiece, the transmission box linkage is used to drive the rotating rod to rotate, so that the wind knife device can swing synchronously while moving in a straight line. The walking device is further controlled to make the wind knife device reciprocate in the workpiece area, forming a sweeping and blowing phenomenon, thereby improving the cleaning effect.

[0019] Preferably, the first air inlet of the wind knife rear plate is provided with an air inlet switching valve, the air inlet switching valve is connected to at least a hot air inlet duct and a cold air inlet duct, the brackets on both sides of the wind knife device are respectively provided with proximity switches, the wind knife device is provided with a transmitting element cooperating with the proximity switch, and the proximity switch is communicatively connected with the air inlet switching valve.

[0020] By adopting the above technical scheme, during the sweeping process of the wind knife device, the air intake switching valve is used to blow out cold air when the wind knife device swings forward, the surface of the workpiece shrinks slightly due to the cooling, and the dust falls off is accelerated. When the wind knife device swings backward, hot air is blown out to avoid or remove water mist on the surface of the workpiece.

[0021] Preferably, a clutch is provided between one end of the rotating rod and the output shaft of the transmission box.

[0022] By adopting the above technical solution, the clutch can be used to disconnect the connection between the rotating rod and the transmission box at any time to control the rotation angle of the wind knife device, thereby providing the wind knife device with more working modes.

[0023] Preferably, the clutch comprises a positioning device for limiting the rotation of the rotating rod.

[0024] By adopting the above technical solution, the positioning device can fix the wind knife device to prevent the wind knife device from deflecting under the reaction force of the wind knife.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The present invention arranges the linear air outlet of the wind knife device with a width of less than 1 mm obliquely outward, so as to blow dust to the outside of the workpiece to prevent the dust from falling back onto the workpiece surface for a second time. Combined with the centralized wind force, the cleaning force is strong and the cleaning effect is high.

[0027] 2. The present invention is equipped with a lifting negative pressure dust collection system, which can collect dust within the shortest distance, reduce fallback, and improve the cleaning effect.

[0028] 3. The present invention can directly adjust the air cavity volume of the wind knife device outside the equipment, control the wind strength under the same air intake volume, facilitate the control of the cleaning of the surfaces of workpieces with different thicknesses, avoid damage to the workpiece due to excessive wind force, or insufficient cleaning force due to insufficient wind force, and make the equipment more applicable.

[0029] 4. The present invention uses a simple slide plate structure to enable the wind knife to be segmented and converged, thereby reducing dust and fallback caused by the wind knife working on the surface of an object outside the workpiece, and improving the cleaning effect.

[0030] 5. The present invention makes the air knife device move and swing in the sweeping mode to strengthen the cleaning force for stubborn residues on the surface. Furthermore, with the combined effect of the cold and hot air knives and the ion air knives, the dust on the surface of the workpiece can be quickly removed, and the cleaning effect is good.

[0031] The wind knife device of the present invention has a simple structure, is easy to assemble and install, has multiple working modes, and has adjustable wind force and air duct, high flexibility in use and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural diagram of embodiment 1 of the present invention.

[0033] Figure 2 This is a schematic diagram of the structure of embodiment 1 of the present invention Figure 2 .

[0034] Figure 3 It is a schematic diagram of the clutch structure of embodiment 1 of the present invention.

[0035] Figure 4 It is a schematic diagram of the structure of the transmission box of Example 1 of the present invention.

[0036] Figure 5 It is a schematic diagram of the structure of the wind knife device according to Example 1 of the present invention.

[0037] Description of reference numerals: 1. wind knife device; 11. wind knife front plate; 111. inclined cavity wall; 112. slide plate; 113. bolt; 114. long groove; 115. nut; 12. wind knife rear plate; 121. fixing block; 13. wind cavity; 131. first air inlet; 132. ion wind inlet; 133. air outlet; 134. partition; 135. rotating plate; 136. threaded pressure rod; 137. threaded hole; 138. knob; 139. extension; 14. launch member; 2. transmission box; 21. transmission box input shaft; 2 2. Gear; 23. First sprocket; 24. Second sprocket; 25. First bevel gear; 26. Second bevel gear; 27. Third bevel gear; 3. Clutch; 31. Driven plate; 32. Driving plate; 33. Round head rod; 34. Positioning device; 35. Tooth surface; 36. Protruding rod; 37. Coil spring; 4. Intake switching valve; 5. Travel device; 51. Frame; 511. Rack; 52. Cylinder; 53. Bracket; 531. Connecting seat; 532. Proximity switch; 6. Rotating rod; 7. Negative pressure dust collecting device; 8. Lifting device. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-5This application is described in further detail.

[0039] Example 1

[0040] The present application embodiment discloses an air knife cleaning device. Figure 1 , including the wind knife device 1, the walking device 5 and the lifting device 8, the walking device 5 is used to drive the wind knife device 1 to move forward and backward, and the walking device 5 is arranged on the lifting part of the lifting device 8. Figure 2 Furthermore, in order to improve efficiency, two wind knife devices 1 can be set on the walking device 5.

[0041] Reference Figure 1 The walking device 5 includes a frame 51, a cylinder 52 and a bracket 53. The cylinder 52 is arranged on the frame 51, and the bracket 53 is fixed to the moving part of the cylinder 52; the bracket 53 is integrated with a negative pressure dust collecting device 7. A connecting seat 531 is provided at the lower part of the bracket 53, and a rotating rod 6 is passed through the connecting seat 531. The wind knife device 1 includes a fitted wind knife front plate 11 and a wind knife rear plate 12. A fixing block 121 is provided at the upper part of the wind knife rear plate 12. The rotating rod 6 is passed through the fixing block 121. The fixing block 121 is fixed to the rotating rod 6, and the wind knife device 1 rotates under the drive of the rotating rod 6. An air cavity 13 is provided between the wind knife front plate 11 and the wind knife rear plate 12. A first air inlet 131 and an ion wind inlet 132 are provided on the wind knife rear plate 12. The first air inlet 131 and the ion wind inlet 132 are respectively connected to the wind cavity 13. The first air inlet 131 of the wind knife rear plate 12 is provided with an air inlet switching valve 4, and the air inlet switching valve 4 is connected to at least a hot air inlet duct and a cold air inlet duct. The brackets 53 on both sides of the wind knife device 1 are respectively provided with proximity switches 532, and the wind knife device 1 is provided with a transmitter 14 that cooperates with the proximity switch 532, and the proximity switch 532 is connected to the air inlet switching valve 4 for communication. There is a large-sized wind slot on the wind knife rear plate 12 at the lower part of the wind cavity 13. After the wind knife front plate 11 and the wind knife rear plate 12 are locked, a small gap air outlet 133 with a width of less than 1mm will be formed, preferably with a width of 0.05mm, thereby generating a high-pressure air wall. The local height of the air outlet 133 gradually increases from the direction away from the walking device 5, and the length direction of the air outlet 133 is perpendicular to the moving direction of the wind knife device 1.

[0042] See also Figure 3A transmission box 2 is provided at the lower part of the bracket 53 on one side of the wind knife device 1, and one end of the rotating rod 6 is connected to the output shaft of the transmission box 2 through the clutch 3. The clutch 3 includes a driven plate 31 and an active plate 32. The driven plate 31 is connected to the rotating rod 6. A positioning device 34 is provided on the side of the driven plate 31. The positioning device 34 is composed of a tooth surface 35 provided on the circumference of the driven plate 31 and a convex rod 36 provided next to it. The convex rod 36 is downward as a whole under the action of a coil spring 37 provided on the upper part, so that the lower end of the convex rod 36 is stuck in the tooth surface 35 of the driven plate 31 to limit the rotation of the driven plate 31; a round head rod 33 is provided on the side of the active plate 32. When the active plate 32 is pressed with the driven plate 31, the round head rod 33 pushes the convex rod 36 to turn to one side, so that the driven plate 31 resumes the free rotation state, otherwise the driven plate 31 is limited.

[0043] See also Figure 4 A transmission gear 22 is provided at the end of the transmission box input shaft 21, a coaxial first sprocket 23 is provided on one side of the transmission gear 22, the first sprocket 23 is connected to a second sprocket 24, the second sprocket 24 is meshed with a second bevel gear 26 through a coaxial first bevel gear 25, and the second bevel gear 26 is meshed with a third bevel gear 27 provided at one end of the rotating rod 6 for transmission. The frame 51 is provided with a rack 511, and the rack 511 is used for meshing transmission when the transmission gear 22 moves. The rack 511 can be composed of intervals, and each section of the rack 511 corresponds to a workpiece position. The rack 511 can also be a whole section, and the clutch 3 controls when the rotating rod 6 rotates under the cooperation of the transmission box 2 and the rack 511.

[0044] See also Figure 5 A long strip partition 134 is provided in the wind cavity 13 along the length direction of the wind cavity 13. The partition 134 is divided into a rotating plate 135 and an extension portion 139. The upper portion of the rotating plate 135 is hinged to the wind cavity 13, the lower portion of the rotating plate 135 is connected to the upper portion of the extension portion 139, and the lower portion of the extension portion 139 is connected to the wind cavity 13. A plurality of blocking columns are provided on one side of the rotating plate 135, and threaded pressure rods 136 are provided between adjacent blocking columns on the other side of the rotating plate 135. The threaded pressure rod 136 passes through a threaded hole 137 provided in the wind cavity 13 and is connected to an external knob 138. An inclined cavity wall 111 is provided on the side of the air cavity 13 away from the threaded pressure rod 136. A long strip-shaped slide plate 112 and a bolt 113 are provided closely to the inclined cavity wall 111. The slide plate 112 is arranged along the length direction of the air cavity 13. A long strip groove 114 is provided on the inclined cavity wall 111. The screw rod of the bolt 113 passes through the slide plate 112 and the long strip groove 114 and is fastened with an external nut 115.

[0045] Working principle: According to the arrangement of the workpieces on the conveyor belt, the slide plate 112 of the inclined cavity wall 111 is adjusted to partially block the air outlet 133, so that most of the wind knife acts on the surface of the workpiece. When the power is turned on, the wind knife device 1 and the negative pressure dust collection device 7 are started, and driven by the walking device 5, they move forward along the workpiece conveyor belt, blowing the dust on the surface of the workpiece to the outside of the equipment. When the wind knife device 1 passes through the preset rack 511 position, the transmission gear 22 meshes with the rack 511 and rotates. After the transmission gear 22 changes direction through the transmission box 2, it drives the rotating rod 6 to rotate, and the rotating rod 6 drives the wind knife device 1 to swing forward. When the transmission gear 22 leaves the preset rack 511 position, the wind knife device 1 is controlled to move backward, and the transmission gear 22 meshes with the preset rack 511 position again, driving the rotating rod 6 to make the wind knife device 1 swing backward. In this process, the swing direction of the wind knife device 1 is consistent with the travel direction, and the swing sweeping action is realized on the workpiece surface. When there are multiple racks 511, that is, multiple rows of workpieces are placed, when the transmission gear 22 retreats to the starting position of the first rack 511, the clutch 3 is started to disconnect the connection between the rotating rod 6 and the transmission box 2. When the transmission gear 22 passes the first rack 511 for the second time, the wind knife device 1 does not rotate. When the wind knife device 1 reaches the second rack position, the clutch 3 is closed to reconnect the rotating rod 6 with the transmission box 2, and the sweeping and blowing action at the first rack 511 is repeated. When the wind knife device 1 swings to the end of the rack 511, the proximity switch 532 transmitter 14 provided on the side of the wind knife device 1 triggers the proximity switch 532, and the proximity switch 532 sends a signal to control the air intake switching valve 4 to switch to the hot air intake duct or the cold air intake duct, so as to achieve the synchronous change of the swing direction and the air supply temperature. Further, the proximity switch 532 can also be connected to the clutch 3 for communication. When the wind knife device 1 rotates to the proximity switch 532 position, a signal is sent to control the clutch 3 to open and stop the wind knife device 1 from rotating. The cleanliness of the surface of the first row of workpieces after sweeping and blowing is detected, and the cleaning force is increased and the dust falling back is reduced by adjusting the size of the air cavity 13 and the height of the air knife device 1, so as to improve the cleaning effect.

[0046] Example 2

[0047] The difference between Example 2 and Example 1 is that a controller is provided, and the controller is electrically connected to the clutch 3, the walking device 5, the lifting device 8, the air intake switching valve 4, the proximity switch 532, the negative pressure dust collection device 7 and a workpiece surface cleanliness detection device. The bolts 113 and the long grooves 114 of the inclined cavity wall 111 are replaced by an active cavity provided in the wind knife front plate 11, and a sealing film is provided on the side wall of the air outlet 133 at the lower part of the active cavity, and a slide plate 112 is provided in the active cavity on one side of the sealing film, and the slide plate 112 is connected to a first electric cylinder. A plurality of groups of first distance sensors are provided at the lower part of the wind knife device 1. The knob 138 on one side of the rotating plate 135 is connected to a first motor output shaft.

[0048] Working principle: The first distance sensor detects whether there is a workpiece directly below any part of the wind knife device 1. When the first distance sensor at a certain point detects the workpiece, the air outlet 133 section corresponding to the wind knife device 1 is calculated according to the function model of the point, and the controller controls the first electric cylinder to push the slide plate 112 to press out the sealing film to block other sections of the air outlet 133, so that the wind knife does not fall outside the surface of the workpiece. When the power is turned on, the controller controls the wind knife device 1 and the negative pressure dust collection device 7 to start, and they move forward along the workpiece conveyor belt driven by the walking device 5, blowing the dust on the surface of the workpiece to the outside of the equipment. When the wind knife device 1 passes through the preset rack 511 position, the controller accumulates the count by 1, that is, the count is increased once each time the wind knife device 1 passes the head of the rack 511. At this time, the transmission gear 22 meshes with the rack 511 and rotates. After the transmission gear 22 changes direction through the transmission box 2, it drives the rotating rod 6 to rotate, and the rotating rod 6 drives the wind knife device 1 to swing forward. When the transmission gear 22 leaves the preset rack 511 position, the controller controls the walking device 5 to drive the wind knife device 1 to move backward, and the transmission gear 22 meshes with the preset rack 511 position again, driving the rotating rod 6 to swing the wind knife device 1 backward. In this process, the swing direction of the wind knife device 1 is consistent with the travel direction, and the swing sweeping action is realized on the surface of the workpiece. When the wind knife device 1 moves backward and returns to the head of the rack 511, the count is increased once, and the controller accumulates the count of 2. The controller determines that the count is an even number at this time, and the controller controls the clutch 3 to start, disconnecting the connection between the rotating rod 6 and the transmission box 2, and the wind knife device 1 will not rotate when it passes the rack 511 again. When the wind knife device 1 reaches the second rack head position, the controller accumulates the count 3, and the controller determines that the count at this time is an odd number. The controller controls the clutch 3 to close, so that the rotating rod 6 is reconnected to the transmission box 2, and the sweeping action of the first rack 511 is repeated. When the wind knife device 1 reaches the end of the rack 511, the proximity switch 532 transmitter 14 provided on the side of the wind knife device 1 swings to the position of triggering the proximity switch 532, and the proximity switch 532 sends a signal to control the air intake switching valve 4 to switch to the hot air intake duct or the cold air intake duct, so as to achieve the synchronous change of the swing direction and the air supply temperature. When the workpiece surface cleanliness detection device detects that the cleanliness of the first row of workpiece surfaces after sweeping and blowing does not meet the standard, the controller controls the first motor to change the size of the wind cavity 13 and controls the lifting device 8 to adjust the height of the wind knife device 1 and the negative pressure dust collection device 7 to change the wind strength and reduce the dust fallback, thereby improving the cleaning strength and effect.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An air knife cleaning device, characterized in that: The invention comprises a wind knife device (1) and a walking device (5), wherein the walking device (5) is used to drive the wind knife device (1) to move forward and backward; the wind knife device (1) comprises a fitted wind knife front plate (11) and a wind knife rear plate (12), wherein an air cavity (13) is arranged between the wind knife front plate (11) and the wind knife rear plate (12), wherein a first air inlet (131) is arranged on one side of the wind knife rear plate (12), wherein the first air inlet (131) is connected to the air cavity (13), wherein an air outlet (133) is arranged at the lower part of the air cavity (13), wherein the local height of the air outlet (133) gradually increases from the direction away from the walking device (5), wherein the length direction of the air outlet (133) is perpendicular to the moving direction of the wind knife device (1), and wherein the width of the air outlet (133) is less than 1 mm; The wind cavity (13) is provided with a long strip partition (134) arranged along the length direction of the wind cavity (13), the partition (134) is divided into a rotating plate (135) and an extension portion (139), the upper portion of the rotating plate (135) is hinged to the wind cavity (13), the lower portion of the rotating plate (135) is connected to the upper portion of the extension portion (139), and the lower portion of the extension portion (139) is connected to the wind cavity (13), a plurality of blocking columns are provided on one side of the rotating plate (135), and a plurality of threaded pressure rods (136) are provided on the other side of the rotating plate (135), and the threaded pressure rods (136) pass through threaded holes (137) provided in the wind cavity (13) and are connected to external knobs (138).

2. The air knife cleaning device according to claim 1, characterized in that: A negative pressure dust collecting device (7) is provided on the upper part of the wind knife device (1).

3. The air knife cleaning device according to claim 1, characterized in that: It comprises a lifting device (8), wherein the walking device (5) is arranged on the lifting part of the lifting device (8).

4. The air knife cleaning device according to claim 1, characterized in that: A long strip-shaped slide plate (112) and a bolt (113) are provided in the air cavity (13); the slide plate (112) is arranged along the length direction of the air cavity (13); a long strip groove (114) is provided on the side wall of the air cavity (13); and a screw rod of the bolt (113) passes through the slide plate (112) and the long strip groove (114) and is fastened to an external nut (115).

5. The air knife cleaning device according to claim 1, characterized in that: An ion wind inlet (132) is provided on the upper portion of the wind knife device (1).

6. The air knife cleaning device according to claim 1, characterized in that: The walking device (5) comprises a frame (51), a cylinder (52) and a bracket (53), wherein the cylinder (52) is arranged on the frame (51), and the bracket (53) is fixed to the moving part of the cylinder (52); a connecting seat (531) is provided at the lower part of the bracket (53), a rotating rod (6) is passed through the connecting seat (531), a fixing block (121) is partially provided on the rotating rod (6), and the fixing block (121) is fixed to the upper part of the wind knife device (1); a transmission box (2) is provided at the lower part of the bracket (53), one end of the rotating rod (6) is connected to the output shaft of the transmission box (2), a transmission gear (22) is provided at the end of the input shaft (21) of the transmission box, and a rack (511) is provided on the frame (51), and the rack (511) is used for meshing transmission when the transmission gear (22) moves.

7. The air knife cleaning device according to claim 6, characterized in that: The first air inlet (131) of the wind knife rear plate (12) is provided with an air inlet switching valve (4), the air inlet switching valve (4) is connected to at least a hot air inlet duct and a cold air inlet duct, the brackets (53) on both sides of the wind knife device (1) are respectively provided with proximity switches (532), the wind knife device (1) is provided with a transmitting element (14) that cooperates with the proximity switch (532), and the proximity switch (532) is communicatively connected with the air inlet switching valve (4).

8. The air knife cleaning device according to claim 6, characterized in that: A clutch (3) is also provided between one end of the rotating rod (6) and the output shaft of the transmission box (2).

9. The air knife cleaning device according to claim 8, characterized in that: The clutch (3) comprises a positioning device (34) for limiting the rotation of the rotating rod (6).

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