Self-cleaning device for a drive belt

Abstract

The application provides a transmission belt self-cleaning device, and belongs to the belt cleaning field.The device comprises a rack, a brush head and a swing assembly.The rack is arranged directly below the transmission belt.The brush head is arranged on the rack, and the two ends of the brush head extend along the transmission direction of the transmission belt.The upper surface of the brush head is provided with brush hairs, and the brush hairs are in frictional contact with the transmission belt.The swing assembly is arranged between the rack and the brush head.When the brush head moves along with the transmission belt under the frictional force of the transmission belt, the swing assembly drives the brush head to move reversely, so that the brush head reciprocally moves along the transmission direction of the transmission belt relative to the rack.The brush head can move along the transmission direction under the frictional force of the transmission belt through the swing assembly, and is reversely pulled back to the original position by the swing assembly after moving a certain distance, so that the brush head reciprocally moves along the transmission direction of the transmission belt, the brush hairs rub the surface of the belt back and forth, stubbornly attached objects can be more effectively loosened and peeled, and the cleaning capacity is obviously improved.

Description

Technical Field

[0001] This invention relates to the field of belt cleaning technology, and more particularly to a self-cleaning device for transmission belts. Background Technology

[0002] Drive belts are widely used in industrial fields such as material conveying and power transmission. During operation, dust, oil, debris, and other impurities continuously adhere to their surfaces. To ensure transmission efficiency and service life, a cleaning device is usually installed under the belt to clean the return surface.

[0003] A common self-cleaning solution involves placing a long, narrow brush head along the width of the drive belt below it. The bristles on the upper surface of the brush head are held in place by an elastic buffer mechanism against the lower surface of the belt. When the belt is running, the bristles clean the belt through unidirectional sliding friction in the direction of belt movement. However, this solution has several drawbacks: the brush head is fixed relative to the frame, and the bristles can only passively scrape in one direction with the belt, lacking active reciprocating wiping action along the belt's transmission direction. This results in poor removal of stubborn, highly adhesive impurities and limited cleaning ability. Furthermore, the bristles, subjected to unidirectional friction for extended periods, are prone to irreversible unilateral tilting deformation, leading to a reduced actual contact area between the bristles and the belt, uneven pressure distribution, further reducing cleaning efficiency and shortening the brush head's lifespan. Summary of the Invention

[0004] In view of this, the present invention proposes a self-cleaning device for transmission belts to solve the problem that the brush head of the existing cleaning device is fixed relative to the frame, and its bristles can only passively scrape in one direction with the direction of belt movement.

[0005] The technical solution of the present invention is implemented as follows: The present invention provides a self-cleaning device for a transmission belt, including a frame, a brush head, and a swing assembly; the frame is disposed directly below the transmission belt; the brush head is disposed on the frame, with both ends of the brush head extending along the transmission direction of the transmission belt, and bristles are disposed on the upper surface of the brush head and the bristles are in frictional contact with the transmission belt; the swing assembly is disposed between the frame and the brush head, and when the brush head moves under the frictional force of the transmission belt, the swing assembly drives the brush head to move in the opposite direction, so that the brush head reciprocates relative to the frame along the transmission direction of the transmission belt.

[0006] Based on the above technical solutions, preferably, the swing assembly includes a bracket, pulleys, rails, a baffle, and a first elastic element; two sets of brackets are symmetrically arranged on the lower surface of the brush head along the extension direction of the brush head; pulleys are arranged at the bottom of the brackets; two rails are symmetrically arranged on the frame, with pulleys installed on the rails and the pulleys moving along the rails; a baffle is arranged on the frame, between the two rails, and on the opposite side of the direction in which the brush head moves due to friction; the first elastic element is arranged between the baffle and the bracket, with both ends of the first elastic element connected to the baffle and the bracket respectively, and the first elastic element pulls the bracket to move in the opposite direction of the transmission direction of the transmission belt.

[0007] More preferably, the brush head includes several units, which are spaced apart along the transmission direction of the transmission belt; several oscillating components are respectively disposed between the several units and the frame.

[0008] Even more preferably, the upper surface of the track is formed in a wave-like pattern, so that the pulley moves up and down back and forth when it moves along the track.

[0009] More preferably, the swing assembly further includes a guide bar, a slider, a pin, and a second elastic element; the guide bar is disposed on the side of the track, and a groove is formed on the guide bar along the axial direction of the track; the slider is disposed in the groove and moves along the groove; the bottom of the bracket is disposed on the cantilever, the top end of the pin is connected to the cantilever and the bottom end extends vertically through the slider downward, and the pin moves vertically relative to the slider; the second elastic element is connected between the cantilever and the slider.

[0010] More preferably, the two sets of cantilever arms, pins, and sliders are arranged on the front and rear sides of the pulley along the axial direction of the track.

[0011] In a further preferred embodiment, the slider has an annular groove in the middle, and the slider is engaged in the groove through the groove.

[0012] More preferably, the swing assembly also includes a roller, which is sleeved in the middle of the slider and disposed in a slot. The roller rotates relative to the slider axis and is disposed in a slide groove, driving the slider to move within the slide groove.

[0013] More preferably, the swing assembly also includes a base plate and a third elastic element; the middle part of the unit is hinged to the top of the bracket, and the two ends of the unit rotate circumferentially around the hinge connection; the base plate is located in the middle of the bracket, and one end of the base plate extends to the bottom of one end of the unit; the third elastic element is connected between the lower surface of one end of the unit and the base plate, and when the unit moves under the action of friction, the third elastic element causes the two ends of the unit to swing left and right relative to the top of the bracket.

[0014] Based on the above technical solutions, preferably, the system also includes a funnel-shaped receiving groove and a recycling groove; a window is provided on the frame; the brush head is positioned directly above the window, and the swing assembly passes through the window; the funnel-shaped receiving groove is positioned on the side of the window facing the brush head and surrounds the window, and catches the dust and dirt brushed off by the brush head; the recycling groove is positioned inside the frame and directly below the brush head, and is positioned on the side of the window away from the brush head and aligned with the window, and catches the dust and dirt that slides off the funnel-shaped receiving groove.

[0015] The self-cleaning device for transmission belts of the present invention has the following advantages over the prior art: (1) The present invention enables the brush head to move along the transmission direction under the friction of the transmission belt through the swing component, and after moving a certain distance, it is pulled back to its original position by the swing component, forming a back-and-forth movement along the belt transmission direction. This causes the bristles to rub against the belt surface, which can more effectively loosen and peel off stubborn deposits and significantly improve cleaning ability. At the same time, during the reciprocating motion of the brush head, the bristles are subjected to frictional forces with alternating directions, avoiding unilateral tilting and deformation caused by continuous unidirectional force. The bristles wear more evenly, effectively extending the overall service life of the brush head.

[0016] (2) The brush head in this invention adopts a multi-unit split design and is combined with a wave-shaped track, unit hinge swing and other structures, so that the brush head can generate up-and-down bumps and left-and-right swings while moving back and forth, forming a multi-dimensional composite cleaning motion, which enhances the peeling and removal effect on stubborn stains.

[0017] (3) The present invention utilizes a funnel and a recycling tank to collect the dust and dirt swept away, effectively preventing dust from flying and secondary pollution, and improving the working environment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a perspective view of the cleaning device of the present invention; Figure 2 This is a front view schematic diagram of the cleaning device of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 This is a front view schematic diagram of another embodiment of the cleaning device of the present invention; Figure 5 This is a front view schematic diagram of the swing assembly of the present invention; Figure 6 This is a side cross-sectional view of the cleaning device of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle.

[0020] In the diagram: 1. Frame; 10. Drive belt; 101. Window; 2. Brush head; 21. Unit; 3. Swing assembly; 31. Bracket; 311. Cantilever; 312. Slider; 313. Pin; 314. Second elastic element; 315. Roller; 32. Pulley; 33. Track; 331. Guide bar; 34. Baffle; 35. First elastic element; 36. Base plate; 37. Third elastic element; 301. Slide groove; 302. Slot; 4. Funnel receiving groove; 5. Recycling trough. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0022] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0027] like Figure 1 As shown, combined with Figure 2 The present invention provides a self-cleaning device for transmission belts, comprising a frame 1, a brush head 2, and a swing assembly 3.

[0028] The frame 1 is positioned directly below the drive belt 10; the frame 1 supports the entire cleaning device. The frame 1 can be a frame structure made of welded or bolted profiles, fixed to the ground or equipment base.

[0029] Brush head 2 is mounted on frame 1. Both ends of brush head 2 extend along the transmission direction of transmission belt 10. Brush head 2 is elongated to accommodate the length of transmission belt 10, and its width should be slightly greater than the width of transmission belt 10. The upper surface of brush head 2 is provided with densely arranged bristles, which rub against the return surface of transmission belt 10.

[0030] The oscillating component 3 is positioned between the frame 1 and the brush head 2. When the brush head 2 moves under the friction of the drive belt 10, the oscillating component 3 drives the brush head 2 to move in the opposite direction, causing the brush head 2 to reciprocate relative to the frame 1 along the transmission direction of the drive belt 10. Specifically, when the drive belt 10 is running, the friction between the drive belt 10 and the brush bristles causes the brush head 2 to produce a positive displacement along the transmission direction of the drive belt 10. At this time, the oscillating component 3 does not prevent this displacement, but allows the brush head 2 to move accordingly. However, after the brush head 2 has moved a certain distance, the oscillating component 3 will generate a reverse force, pulling the brush head 2 to move and reset in the opposite direction of the transmission direction of the drive belt 10. After the brush head 2 has reset, the oscillating component 3 will lose the reverse force, causing the brush head 2 to move forward again under the action of friction. This results in the brush head 2 continuously reciprocating relative to the frame 1 along the transmission direction of the drive belt 10. This reciprocating movement allows the brush bristles to perform contact cleaning of the drive belt 10 while also providing an additional active scrubbing effect.

[0031] exist Figure 6 In one embodiment shown, the swing assembly 3 includes a bracket 31, a pulley 32, a track 33, a baffle 34, and a first elastic element 35.

[0032] Two sets of brackets 31 are symmetrically arranged on the lower surface of the brush head 2 along the extension direction of the brush head 2, so that the brush head 2 is supported by both sides and the force is balanced.

[0033] The pulley 32 is located at the bottom of the bracket 31; two tracks 33 are symmetrically arranged on the frame 1, and the pulley 32 is installed on the tracks 33 so that the pulley 32 can move along the tracks 33. The pulley 32 is placed in the tracks 33 and can roll smoothly along the tracks 33, providing guidance and support for the back and forth movement of the brush head 2.

[0034] The baffle 34 is mounted on the frame 1 and is positioned between the two tracks 33. The baffle 34 is positioned on the opposite side of the direction in which the brush head 2 moves due to friction, that is, the baffle 34 is located behind the direction in which the brush head 2 follows the movement.

[0035] The first elastic element 35 is disposed between the baffle 34 and the bracket 31. The two ends of the first elastic element 35 are respectively connected to the baffle 34 and the bracket 31. Specifically, the first elastic element 35 can be a tension spring. The first elastic element 35 pulls the bracket 31 to move in the opposite direction to the transmission direction of the transmission belt 10.

[0036] Initially, the first elastic element 35 is relaxed but has a certain preload, causing the bracket 31 and brush head 2 to tend to return to their original position. When the transmission belt 10 drives the brush head 2 and the bracket 31 to move forward along the track 33 through friction, the pulley 32 rolls, and the first elastic element 35 is gradually stretched, increasing its elastic restoring force. When the restoring force increases to the point that it can overcome the maximum static friction between the belt and the bristles or cause local slippage, the first elastic element 35 will pull the bracket 31 and brush head 2 to move backward and return to their original position. Then, the brush head 2 is driven forward again by friction, and this cycle repeats to achieve the reciprocating movement of the brush head 2.

[0037] exist Figure 4 In one embodiment shown, to further improve the adaptability and cleaning uniformity of the brush head to different areas of the belt, the brush head 2 is not a one-piece structure. The brush head 2 includes several units 21, which are spaced apart along the transmission direction of the drive belt 10. Each unit 21 is an independent brush block with bristles on its upper surface. Several oscillating components 3 are respectively disposed between the units 21 and the frame 1. This multi-unit design allows each unit 21 to independently reciprocate according to the local undulations and friction changes of the belt at its location, avoiding the lifting or suspension that can occur with a one-piece long brush head due to uneven local force, and ensuring a consistent cleaning effect across the entire belt width.

[0038] exist Figure 3 In one embodiment shown, because the brush head 2 adopts a multi-unit split design, the upper surface of the track 33 forms a wave-like undulation, that is, it has periodic peaks and troughs along the length of the track 33. When the pulley 32 rolls on the track 33 driven by the movement of the brush head 2, the pulley 32 moves up and down reciprocally with the wave-like surface. Since the brush head 2 rises and falls synchronously with the pulley 32 through the bracket 31, this up-and-down movement is transmitted to the brush head 2 and the bristles, so that the brush head 2 moves back and forth while simultaneously experiencing up-and-down bouncing motion. This vibration can effectively shake off the dust attached to the bristles and enhance the close friction and scraping effect of the bristles on the belt surface, further improving the cleaning ability.

[0039] exist Figure 5In one embodiment shown, in order to make the up-and-down movement of the brush head 2 more stable and controlled on the undulating track 33, the swing assembly 3 further includes a guide bar 331, a slider 312, a pin 313, and a second elastic element 314; the guide bar 331 is disposed on the side of the track 33, and a groove 301 is formed on the guide bar 331 along the axial direction of the track 33; the slider 312 is disposed in the groove 301 and moves along the groove 301; the bottom of the bracket 31 is disposed on the cantilever 311, the top end of the pin 313 is connected to the cantilever 311 and the bottom end extends downward perpendicularly through the slider 312, and the pin 313 moves perpendicularly relative to the slider 312; the second elastic element 314 is connected between the cantilever 311 and the slider 312, and the second elastic element 314 is a compression spring sleeved on the outside of the pin 313. As pulley 32 rises along the wave surface of track 33, bracket 31 drives cantilever 311 upward, and pin 313 is pulled upward from slider 312. The second elastic element 314 is stretched, and this elastic force provides downward tension to cantilever 311, thus ensuring that pulley 32 remains in close contact with the surface of track 33 and preventing it from jumping or slipping. When pulley 32 descends over the wave crest, the second elastic element 314 releases energy, pulling cantilever 311 and bracket 31 downward, making the up-and-down movement more stable, and ensuring that the up-and-down movement does not interfere with the forward and backward sliding of slider 312 along groove 301.

[0040] exist Figure 5 In one embodiment shown, two sets of cantilever arms 311, pins 313 and sliders 312 are arranged along the axial direction of the track 33 on the front and rear sides of the pulley 32, which ensures the overall stability of the support 31 during movement and up-and-down bumping. The support 31 will not tilt back and forth when it moves, and the overall force is more balanced.

[0041] exist Figure 7 In one embodiment shown, an annular groove 302 is provided in the middle of the slider 312, and the slider 312 is engaged in the groove 301 through the groove 302. This engaging structure limits the position of the slider 312 in the vertical direction, so that it can only slide along the axial direction of the groove 301 and will not come out from the side, thus ensuring the reliability of the guide.

[0042] exist Figure 7 In one embodiment shown, the swing assembly 3 further includes a roller 315, which is sleeved in the middle of the slider 312 and disposed within the slot 302. The roller 315 rotates relative to the slider 312 axis and is disposed within the slide groove 301, driving the slider 312 to move within the slide groove 301. The roller 315 can reduce the frictional resistance when the slider 312 moves within the slide groove 301. After assembly, the outer circular surface of the roller 315 contacts the two side walls of the slide groove 301. When the slider 312 moves, the roller 315 rolls within the slide groove 301, converting sliding friction into rolling friction, making the reciprocating movement smoother and reducing wear.

[0043] exist Figure 5 In one embodiment shown, the swing assembly 3 further includes a base plate 36 and a third elastic element 37; the middle part of the unit 21 is hinged to the top end of the bracket 31, and both ends of the unit 21 rotate circumferentially around the hinged connection; the base plate 36 is disposed in the middle of the bracket 31, and one end of the base plate 36 extends below one end of the unit 21; the third elastic element 37 is connected between the lower surface of one end of the unit 21 and the base plate 36, and the third elastic element 37 can be a compression spring or an elastic rubber column. When the unit 21 moves under the action of friction, the third elastic element 37 drives both ends of the unit 21 to rotate circumferentially at a certain angle relative to the bracket 31 in the horizontal plane, that is, to swing left and right. When unit 21 moves under the friction of the belt, due to factors such as the change in the direction of the friction and the change in the resultant force of the first elastic element 35, unit 21 will be subjected to an unbalanced torque. The third elastic element 37 then drives the two ends of unit 21 to swing left and right relative to the top of the bracket 31. The left and right swing, combined with the back and forth reciprocating and up and down bumping, makes the bristles rub the belt with multi-dimensional compound motion, which greatly improves the removal effect of stubborn dirt.

[0044] exist Figure 1 In one embodiment shown, a funnel-shaped receiving groove 4 and a collection groove 5 are also included; the funnel-shaped receiving groove 4 and the collection groove 5 serve to collect dust and dirt. A window 101 is provided on the frame 1, providing sufficient space for the movement of the swing assembly 3; the brush head 2 is positioned directly above the window 101, and the swing assembly 3 passes through the window 101; the funnel-shaped receiving groove 4 is positioned on the side of the window 101 facing the brush head 2 and surrounds the window 101, catching the dust and dirt brushed off by the brush head 2; the collection groove 5 is located inside the frame 1 and directly below the brush head 2, positioned on the side of the window 101 away from the brush head 2 and aligned with the window 101, catching the dust and dirt sliding down from the funnel-shaped receiving groove 4. When the dust and dirt brushed off by the brush head 2 falls, it is caught by the funnel-shaped receiving groove 4 and slides along its inclined surface towards the window 101. Dust and dirt collected and slid down through the funnel-shaped receiving trough 4 pass through the window opening 101 and fall entirely into the recycling trough 5 for storage. The recycling trough 5 can be designed as a drawer for easy periodic removal and cleaning, effectively preventing the spread of dust during sweeping.

[0045] Working principle: In use, the frame 1 is fixed directly below the return section of the drive belt 10, so that the bristles on the upper surface of the brush head 2 contact the lower surface of the drive belt 10 with appropriate pressure. The device is started, causing the drive belt 10 to run. The friction between the belt and the bristles initially drives each unit 21 or the entire brush head 2 forward along the transmission direction. At this time, the pulley 32 rolls forward along the track 33, and the first elastic element 35 is gradually stretched, accumulating elastic force. After moving a certain distance, the restoring force of the first elastic element 35 overcomes the friction, pulling the bracket 31 along with the brush head 2 back to its original position. Then, the friction again drives the brush head forward, thus forming a continuous reciprocating motion along the transmission direction.

[0046] During the process, if a wave-shaped track 33 is used, the rolling of the pulley 32 will cause the bracket 31 and brush head 2 to move up and down, and the second elastic element 314 will ensure that the pulley is in contact with the track; if the unit 21 is hinged in the middle and a third elastic element 37 is provided, each unit 21 will also swing left and right. The bristles powerfully peel off the dirt and dust attached to the surface of the belt in the multi-dimensional movement of forward and backward, up and down and left and right.

[0047] The swept-down impurities fall downwards into the funnel receiving groove 4, and then enter the recovery tank 5 through the window 101. Operators only need to periodically empty the recovery tank 5. This device requires no additional power, relying entirely on belt friction for operation, making it energy-efficient and structurally reliable.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-cleaning device for transmission belts, characterized in that: Includes frame (1), brush head (2) and oscillation assembly (3); The frame (1) is positioned directly below the transmission belt (10); The brush head (2) is mounted on the frame (1). Both ends of the brush head (2) extend along the transmission direction of the transmission belt (10). The upper surface of the brush head (2) is provided with bristles, and the bristles are in frictional contact with the transmission belt (10). The swing assembly (3) is disposed between the frame (1) and the brush head (2). When the brush head (2) moves under the friction of the transmission belt (10), the swing assembly (3) drives the brush head (2) to move in the opposite direction, so that the brush head (2) moves back and forth relative to the frame (1) along the transmission direction of the transmission belt (10).

2. The self-cleaning device for transmission belts according to claim 1, characterized in that: The swing assembly (3) includes a bracket (31), a pulley (32), a track (33), a baffle (34), and a first elastic element (35). The two sets of brackets (31) are symmetrically arranged on the lower surface of the brush head (2) along the extension direction of the brush head (2); The pulley (32) is located at the bottom of the bracket (31); Two tracks (33) are symmetrically arranged on the frame (1), and pulleys (32) are provided on the tracks (33) so that the pulleys (32) can move along the tracks (33); The baffle (34) is set on the frame (1), the baffle (34) is set between two tracks (33), and the baffle (34) is set on the opposite side of the direction in which the brush head (2) moves due to friction. The first elastic element (35) is disposed between the baffle (34) and the bracket (31). The two ends of the first elastic element (35) are respectively connected to the baffle (34) and the bracket (31). The first elastic element (35) pulls the bracket (31) to move in the opposite direction of the transmission direction of the transmission belt (10).

3. The self-cleaning device for transmission belts according to claim 2, characterized in that: The brush head (2) includes several units (21), and the several units (21) are arranged at intervals along the transmission direction of the transmission belt (10); Several of the swing components (3) are respectively disposed between several units (21) and the frame (1).

4. The self-cleaning device for transmission belts according to claim 3, characterized in that: The upper surface of the track (33) is wavy, causing the pulley (32) to move up and down repeatedly as it moves along the track (33).

5. A self-cleaning device for transmission belts according to claim 4, characterized in that: The swing assembly (3) also includes a guide bar (331), a slider (312), a pin (313), and a second elastic element (314). The guide bar (331) is disposed on the side of the track (33), and a groove (301) is provided on the guide bar (331) along the axial direction of the track (33). The slider (312) is disposed in the slide groove (301) and moves along the slide groove (301); The bottom of the bracket (31) is set on the cantilever (311), the top end of the pin (313) is connected to the cantilever (311) and the bottom end extends downward through the slider (312) vertically, and the pin (313) moves vertically relative to the slider (312). The second elastic element (314) is connected between the cantilever (311) and the slider (312).

6. A self-cleaning device for transmission belts according to claim 5, characterized in that: The two sets of cantilever (311), pin (313) and slider (312) are arranged on the front and rear sides of pulley (32) along the axial direction of track (33).

7. A self-cleaning device for transmission belts according to claim 5, characterized in that: The slider (312) has an annular groove (302) in the middle, and the slider (312) is engaged in the groove (301) through the groove (302).

8. A self-cleaning device for transmission belts according to claim 7, characterized in that: The swing assembly (3) also includes a roller (315). The roller (315) is sleeved in the middle of the slider (312) and set in the slot (302). The roller (315) rotates relative to the slider (312) axis. The roller (315) is set in the slide groove (301) and drives the slider (312) to move in the slide groove (301).

9. A self-cleaning device for transmission belts according to claim 3, characterized in that: The swing assembly (3) also includes a base plate (36) and a third elastic element (37). The middle part of the unit (21) is hinged to the top of the bracket (31), and the two ends of the unit (21) rotate circumferentially around the hinge connection. The base plate (36) is located in the middle of the bracket (31), and one end of the base plate (36) extends to the bottom of one end of the unit (21); The third elastic element (37) is connected between the lower surface of one end of the unit (21) and the base plate (36). When the unit (21) moves under the action of friction, the third elastic element (37) causes the two ends of the unit (21) to swing left and right relative to the top of the bracket (31).

10. A self-cleaning device for transmission belts according to claim 1, characterized in that: It also includes a funnel receiving channel (4) and a recycling channel (5); The frame (1) has a window (101); The brush head (2) is positioned directly above the window opening (101), and the swing assembly (3) is positioned through the window opening (101); The funnel groove (4) is located on the side of the window opening (101) facing the brush head (2) and surrounds the window opening (101). The funnel groove (4) catches the dust and dirt brushed off by the brush head (2). The recycling trough (5) is located inside the frame (1) and directly below the brush head (2). The recycling trough (5) is located on the side of the window (101) away from the brush head (2) and aligned with the window (101). The recycling trough (5) catches the dust and dirt that slides down the funnel groove (4).

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