Passive reverse belt cleaner for belt conveyor

Abstract

This utility model relates to a passive reverse belt cleaner for belt conveyors, belonging to the technical field of belt cleaners. It includes a fixed crossbeam mounted on the rear side of the head frame column, two drive wheels abutting against the bottom surface of the conveyor belt, a main brush, and two side brushes. Support arms are fixedly connected to both ends of the rear side of the fixed crossbeam. An installation groove is formed at the end of each support arm away from the fixed crossbeam. The main brush is located between the two support arms, and a main shaft is horizontally fixed through the interior of the main brush. The left and right ends of the main shaft are rotatably connected to the corresponding support arm and pass through the rear end of the installation groove. This utility model, by setting up a main brush and two side brushes for multiple cleaning of the conveyor belt, can effectively improve the cleaning effect without causing wear on the rubber layer of the conveyor belt's working surface, avoiding the wear problems common in traditional scraper-type cleaners. Furthermore, the material cleaned by the main brush and side brushes is thrown into the discharge chute, reducing the workload of manual secondary cleaning.

Description

Technical Field

[0001] This utility model relates to the field of belt cleaner technology, and in particular to a passive reverse belt cleaner for belt conveyors. Background Technology

[0002] In industrial and mining enterprises, belt conveyors are common equipment for conveying bulk materials, and belt cleaners are one of the main components of belt conveyors. A small amount of material transferred by a belt conveyor will adhere to the surface of the belt. If not cleaned, it will spill into various parts of the corridor after rubbing against the idlers and rollers during the belt's rotation. This not only wastes materials but also causes environmental pollution and abnormal wear and tear on equipment. It also significantly increases the workload for employees to clean up.

[0003] Existing belt conveyor cleaners are mainly scraper-type cleaners, which clean residual materials on the surface of the belt conveyor by scraping with scrapers made of materials such as alloy rubber and polyurethane.

[0004] However, the cleaning effect of scraper sweepers is affected by the flatness and tension of the conveyor belt rubber layer, resulting in the following problems: if the scraper blade is in too tight contact with the conveyor belt surface, although it will improve the cleaning effect, it will cause abnormal wear on the rubber layer of the conveyor belt working surface, shortening the service life of the conveyor belt and the scraper blade; if the scraper blade is in too loose contact with the conveyor, it will affect the cleaning effect. Summary of the Invention

[0005] To solve the above-mentioned technical problems, this utility model provides a passive reverse belt cleaner for belt conveyors. The technical solution of this utility model is as follows:

[0006] A passive reverse belt cleaner for a belt conveyor includes a fixed crossbeam mounted on the rear side of a head frame column, two drive wheels abutting against the bottom surface of the conveyor belt, a main brush, and two side brushes. Support arms are fixedly connected to both ends of the rear side of the fixed crossbeam. An installation groove is formed at the end of each support arm away from the fixed crossbeam. The main brush is located between the two support arms. A main shaft is horizontally fixed through the interior of the main brush. The left and right ends of the main shaft are rotatably connected to the corresponding support arm and pass through the rear end of the installation groove. The two drive wheels are located on the sides of the two support arms away from the main brush. A horizontal shaft is horizontally fixed through the center of each drive wheel. The two horizontal shafts are respectively connected to the corresponding support arm on one side and pass through the front end of the mounting groove. The mounting groove is connected to a transmission component one for driving the main shaft to rotate in the opposite direction relative to the horizontal shaft. The two horizontal shafts are fixed to the head frame beam by support members. The two side brushes are respectively located on the left and right sides above the fixed beam. The lower center of the two side brushes is connected to a telescopic shaft. The lower end of the telescopic shaft passes through the fixed beam. The lower end of the telescopic shaft is connected to the horizontal shaft by a transmission component two. The main brush and the side brush are both located between the head pulley and the expansion roller of the belt conveyor and above the discharge chute.

[0007] Optionally, the transmission assembly includes a gear 1 and a gear 2 installed inside the mounting groove and meshing with each other. The gear 1 is fixedly sleeved on the end of the main shaft, and the gear 2 is fixedly sleeved on the end of the horizontal shaft away from the support. The upper opening of the mounting groove is detachably fastened with a cover.

[0008] Optionally, a rubber ring is fitted around the outside of the drive wheel.

[0009] Optionally, the support includes a movable seat and a threaded rod. The movable seat is rotatably sleeved on the end of the horizontal shaft away from the support arm. The threaded rod is fixedly connected to the upper end of the movable seat. The top end of the threaded rod movably passes through the side stiffening plate of the head frame crossbeam. Two sets of locking nuts are threaded on the outer side of the threaded rod. The two sets of locking nuts abut against the upper and lower surfaces of the side stiffening plate of the head frame crossbeam, respectively.

[0010] Optionally, the telescopic shaft includes an extension rod and a sleeve. The extension rod is fixedly connected to the center of the lower surface of the side brush, and the sleeve is slidably sleeved on the lower outer side of the extension rod and the two are fixed together by a fixing pin.

[0011] Optionally, the side wall of the extension rod is provided with multiple sets of front-to-back through fixing holes at equal intervals along the longitudinal direction, the upper end of the side wall of the sleeve is provided with a front-to-back through hole, the fixing pin is a bolt, the fixing pin passes through the through hole on one side of the sleeve, the fixing hole at the corresponding position on the side wall of the extension rod and the through hole on the other side of the sleeve in sequence, and the end of the fixing pin is threaded with a fixing nut.

[0012] Optionally, the transmission assembly two includes a bevel gear one and a movable rod. The bevel gear one is fixedly connected to the lower end of the sleeve. Ear plates are fixedly connected to both sides of the lower surface of the fixed crossbeam. The ear plates are located on the side of the bevel gear one near the end of the fixed crossbeam. The movable rod rotates laterally and passes through the ear plate on the corresponding side. A bevel gear two is fixedly sleeved on the end of the movable rod near the bevel gear one. The bevel gear one and the bevel gear two mesh with each other. A synchronous pulley one is fixedly sleeved on the end of the movable rod near the end of the fixed crossbeam. A synchronous pulley two is fixedly sleeved on the outer side of the cross shaft rod. The synchronous pulley two is located between the drive wheel and the support member. A synchronous belt is sleeved on the outer side of both the synchronous pulley one and the synchronous pulley two.

[0013] All of the above optional technical solutions can be combined arbitrarily, and this utility model does not provide a detailed description of the structure after each combination.

[0014] The beneficial effects of this utility model through the above solution are as follows:

[0015] This invention utilizes a main brush and two side brushes for multi-stage cleaning of the conveyor belt, effectively improving cleaning efficiency without causing wear on the rubber layer of the conveyor belt's working surface, thus avoiding the wear problems common in traditional scraper-type cleaners. Secondly, the material swept by the main and side brushes is scattered into the discharge chute, reducing the workload of manual secondary cleaning. Furthermore, the rotational power source for the main and side brushes comes from the belt conveyor itself. By incorporating a drive wheel, the friction generated by the conveyor belt's rotation drives the horizontal shaft, indirectly driving the main and side brushes to rotate, enabling synchronized operation with the belt conveyor.

[0016] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 The right view of the passive reverse belt cleaner provided by this utility model in conjunction with a belt conveyor;

[0018] Figure 2 A bottom view of the passive reverse belt cleaner provided by this utility model in conjunction with a belt conveyor;

[0019] Figure 3 A schematic diagram of the structure of the passive reverse belt cleaner, the head frame column and the head frame crossbeam provided by this utility model;

[0020] Figure 4 Left view of the passive reverse belt cleaner provided by this utility model;

[0021] Figure 5 The three-dimensional passive reverse belt cleaner provided by this utility model Figure 1 ;

[0022] Figure 6 The three-dimensional passive reverse belt cleaner provided by this utility model Figure 2 ;

[0023] Figure 7 An exploded view of the passive reverse belt cleaner provided by this utility model;

[0024] Figure 8 This is a schematic diagram of the structure of the drive wheel, horizontal shaft, support member and side brush in this utility model;

[0025] Figure 9 This is a schematic diagram of the structure of the fixed crossbeam, ear plate, movable rod, bevel gear, and synchronous pulley in this utility model.

[0026] The diagram labels are as follows: 1. Fixed crossbeam; 11. Fixed plate; 12. Ear plate; 13. Protective cover one; 2. Support arm; 21. Mounting slot; 22. Cover; 3. Main brush; 31. Main shaft; 32. Transmission assembly one; 321. Gear one; 322. Gear two; 4. Drive wheel; 5. Horizontal shaft; 6. Support component; 61. Movable seat; 62. Threaded rod; 63. Locking nut; 7. Side brush; 71. Telescopic shaft; 711. Extension rod; 7111. Fixing hole; 712. Sleeve; 7121, Through hole; 713, Fixing pin; 7131, Fixing nut; 7132, Anti-disengagement buckle; 72, Transmission assembly two; 721, Bevel gear one; 722, Movable rod; 723, Bevel gear two; 724, Synchronous pulley one; 725, Synchronous pulley two; 726, Synchronous belt; 727, Protective cover two; 100, Conveyor belt; 200, Belt conveyor head pulley; 300, Extending roller; 400, Head frame column; 500, Head frame crossbeam; 600, Discharge chute. Detailed Implementation

[0027] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0028] Please see Figure 1-9This utility model provides a passive reverse belt cleaner for a belt conveyor, including a fixed crossbeam 1 installed on the rear side of the head frame column 400, two drive wheels 4 abutting against the bottom surface of the conveyor belt 100, a main brush 3, and two side brushes 7. Support arms 2 are fixedly connected to both the left and right ends of the rear side of the fixed crossbeam 1. An installation groove 21 is opened at the end of the support arm 2 away from the fixed crossbeam 1. The main brush 3 is located between the two support arms 2. A main shaft 31 is horizontally fixed through the interior of the main brush 3. The left and right ends of the main shaft 31 are rotatably connected to the corresponding support arm 2 and pass through the rear end of the installation groove 21. The two drive wheels 4 are located on the side of the two support arms 2 away from the main brush 3. A horizontal shaft 5 is horizontally fixed through the center of each drive wheel 4. The ends of the two horizontal shafts 5 that are close to each other are rotatably connected to the support arm 2 on the corresponding side and pass through the front end of the mounting groove 21. The mounting groove 21 is connected to a transmission component 32 for driving the main shaft 31 to rotate in the opposite direction relative to the horizontal shafts 5. The ends of the two horizontal shafts 5 that are far apart are fixed to the head frame beam 500 by the support member 6. The two side brushes 7 are located on the left and right sides above the fixed beam 1, respectively. The lower center of the two side brushes 7 is connected to a telescopic shaft 71. The lower end of the telescopic shaft 71 rotatably passes through the fixed beam 1. The lower end of the telescopic shaft 71 is connected to the horizontal shaft 5 by the transmission component 72. The main brush 3 and the side brushes 7 are both located between the head pulley 200 and the expansion roller 300 of the belt conveyor and above the discharge chute 600.

[0029] Specifically, the two side brushes 7 primarily pre-clean the material on both sides of the working surface of the conveyor belt 100, and the cleaned material is scattered into the discharge chute 600, thus reducing the workload of the main brush 3. The main brush 3 primarily cleans the material in the material-carrying area of ​​the working surface of the conveyor belt 100. Its rotation direction is opposite to the running direction of the conveyor belt 100. As the core part of the cleaner, the material cleaned by the main brush 3 is scattered into the discharge chute 600, thus reducing the need for secondary manual cleaning. Furthermore, the main brush 3 can be freely selected according to the actual bandwidth of the conveyor belt 100.

[0030] Specifically, fixing plates 11 are fixedly connected to both the left and right ends of the front side of the fixed beam 1, and the fixing plates 11 are fixed to the head frame column 400 by bolts. By adjusting the relative height of the fixed beam 1 on the head frame column 400, the contact area between the main brush 3, the drive wheel 4 and the conveyor belt 100 can be flexibly changed. The contact area between the side brush 7 and the surface of the conveyor belt 100 can be adjusted by adjusting the height of the telescopic shaft 71, thereby achieving cleaning effects at different stages of use.

[0031] In this invention, the passive driving force generated by the friction between the two drive wheels 4 and the conveyor belt 100 serves as the rotational power source for the main brush 3 and the side brush 7. When the conveyor belt 100 is running, it can drive the two sets of drive wheels 4 and the horizontal shaft 5 at its bottom to rotate. The horizontal shaft 5, in turn, drives the main shaft 31 to rotate in the opposite direction through the transmission assembly 32. At the same time, the horizontal shaft 5 drives the side brush 7 to rotate through the transmission assembly 72. At this time, the main brush 3 and the side brush 7 begin cleaning operations. Conversely, when the conveyor belt 100 stops running, the drive wheels 4 stop rotating, and the main brush 3 and the side brush 7 also stop running synchronously, without the need for additional manual operation.

[0032] In addition, the main brush 3 and side brush 7 have minimal functional loss during cleaning operations, will not damage the conveyor belt 100, and provide good cleaning results, reducing the workload of manual secondary cleaning. Since the main brush 3 and side brush 7 are installed between the head pulley 200 and the expansion roller 300 of the belt conveyor and are located above the discharge chute 600, the material cleaned by the main brush 3 and side brush 7 will be thrown into the discharge chute 600 and finally transported away with the downstream belt conveyor, improving the material recovery rate.

[0033] In addition, the sweeper is easy to install. It only requires fixing the fixed crossbeam 1 to the head frame column 400 and then fixing the support 6 to the head frame crossbeam 500.

[0034] It should be noted that the conveyor belt 100, belt conveyor head pulley 200, expansion roller 300, head frame column 400, head frame crossbeam 500, and discharge chute 600 mentioned above are all existing technical features of belt conveyors in this field. The belt conveyor head pulley 200 is located at the front end of the conveyor belt 100, the expansion roller 300 is located at the bottom of the conveyor belt 100 and close to the front end, the head frame column 400 is located on the left and right sides of the belt conveyor head pulley 200, the head frame crossbeam 500 is welded laterally to the rear side of the head frame column 400, and the discharge chute 600 is located directly below the belt conveyor head pulley 200. For its specific structure, please refer to [reference needed]. Figure 1 , Figure 2 and Figure 3 As shown.

[0035] Furthermore, the transmission assembly 32 includes a gear 321 and a gear 322 that are installed inside the mounting groove 21 and mesh with each other. The gear 321 is fixedly sleeved on the end of the main shaft 31, and the gear 322 is fixedly sleeved on the end of the horizontal shaft 5 away from the support member 6. The upper opening of the mounting groove 21 is detachably fastened with a cover 22.

[0036] Specifically, such as Figure 1As shown, during the material conveying process, the head wheel 200 of the belt conveyor and the conveyor belt 100 operate counterclockwise. At this time, both sets of drive wheels 4 rotate clockwise. The drive wheels 4 drive the horizontal shaft 5 to rotate clockwise, and the horizontal shaft 5 drives the second gear 322 to rotate clockwise. Since the second gear 322 is meshed with the first gear 321 on one side, the first gear 321 rotates counterclockwise. The first gear 321 then drives the main brush 3 to rotate counterclockwise through the main shaft 31, thus realizing that the main brush 3 and the conveyor belt 100 rotate in opposite directions. At this time, the material cleaned by the main brush 3 will be thrown into the discharge chute 600. Secondly, the upper end of the mounting groove 21 is detachably connected to a cover 22, which facilitates the maintenance of the first gear 321 and the second gear 322 in the mounting groove 21. The cover 22 can be fixed by screws or by snap-fit.

[0037] Furthermore, a rubber ring is fitted on the outer side of the drive wheel 4.

[0038] Specifically, a rubber ring is fitted around the outside of the drive wheel 4 to increase the friction between the drive wheel 4 and the conveyor belt 100, thereby ensuring that the conveyor belt 100 can drive the drive wheel 4 to rotate synchronously during operation, thus providing a continuous power source for the main brush 3 and the side brush 7. Furthermore, the rubber ring has wear-resistant properties, effectively resisting long-term friction and wear.

[0039] Furthermore, the support member 6 includes a movable seat 61 and a threaded rod 62. The movable seat 61 is rotatably sleeved on the end of the horizontal shaft 5 away from the support arm 2. The threaded rod 62 is fixedly connected to the upper end of the movable seat 61. The top end of the threaded rod 62 movably passes through the side stiffening plate of the head frame crossbeam 500. Two sets of locking nuts 63 are threaded on the outer side of the threaded rod 62. The two sets of locking nuts 63 respectively abut against the upper and lower surfaces of the side stiffening plate of the head frame crossbeam 500.

[0040] Specifically, the support member 6 provides auxiliary support for the main brush 3, ensuring it can adhere to the bottom surface of the conveyor belt 100 for material cleaning. Holes need to be pre-drilled in the side stiffeners of the head frame beam 500 to allow the threaded rods 62 to pass through. When installing the fixed beam 1, first insert the two sets of threaded rods 62 into the holes drilled in the corresponding side stiffeners of the head frame beam 500, then fix the fixed beam 1 to the head frame column 400. After the fixed beam 1 is fixed, tighten the two sets of locking nuts 63 on the outside of the threaded rods 62, so that the two sets of locking nuts 63 abut against the upper and lower surfaces of the side stiffeners of the head frame beam 500 respectively. The movable seat 61 is rotatably connected to the horizontal shaft 5, allowing for flexible adjustment of the actual orientation of the threaded rods 62 according to the hole positions.

[0041] Furthermore, the telescopic shaft 71 includes an extension rod 711 and a sleeve 712. The extension rod 711 is fixedly connected to the center of the lower surface of the side brush 7. The sleeve 712 is slidably sleeved on the lower outer side of the extension rod 711 and the two are fixed together by a fixing pin 713. The side wall of the extension rod 711 has multiple sets of front-to-back through fixing holes 7111 equidistantly arranged along the longitudinal direction. The upper end of the side wall of the sleeve 712 has a front-to-back through hole 7121. The fixing pin 713 is a bolt. The fixing pin 713 passes through the through hole 7121 on one side of the sleeve 712, the fixing hole 7111 at the corresponding position on the side wall of the extension rod 711, and the through hole 7121 on the other side of the sleeve 712 in sequence. The end of the fixing pin 713 is threaded with a fixing nut 7131. The end of the fixing pin 713 also has a through hole, and an anti-disengagement buckle 7132 is movably inserted into the through hole.

[0042] Specifically, the contact area between the side brush 7 and the surface of the conveyor belt 100 can be adjusted by changing the height of the telescopic shaft 71. When adjusting the height of the telescopic shaft 71, first remove the fixing pin 713 from the fixing hole 7111 and the through hole 7121. At this time, the extension rod 711 can slide up and down relative to the sleeve 712. After adjustment, insert the fixing pin 713 into the through hole 7121 on one side of the sleeve 712, pass it through the corresponding fixing hole 7111, and finally exit through the through hole 7121 on the other side of the sleeve 712. Then, fit the fixing nut 7131 onto the end of the fixing pin 713. At this time, the fixing pin 713 will be unable to disengage from the fixing hole 7111 and the through hole 7121. To prevent the fixing nut 7131 from loosening due to long-term use, an anti-disengagement buckle 7132 can be inserted into the elongated hole for effective fixation. The anti-disengagement buckle 7132 can be made of materials such as iron wire to prevent the fixing nut 7131 from accidentally loosening during use.

[0043] Furthermore, the transmission assembly 72 includes a bevel gear 721 and a movable rod 722. The bevel gear 721 is fixedly connected to the lower end of the sleeve 712. Ear plates 12 are fixedly connected to both sides of the lower surface of the fixed crossbeam 1. The ear plates 12 are located on the side of the bevel gear 721 closest to the end of the fixed crossbeam 1. The movable rod 722 rotates laterally through the ear plate 12 on the corresponding side. A bevel gear 723 is fixedly sleeved on the end of the movable rod 722 closest to the bevel gear 721. The bevel gear 721 and the bevel gear 723 mesh with each other. The movable rod 722 is located near the end of the fixed crossbeam 1. One end of the synchronous wheel is fixedly fitted with a first synchronous wheel 724, and the outer side of the horizontal shaft 5 is fixedly fitted with a second synchronous wheel 725. The second synchronous wheel 725 is located between the drive wheel 4 and the support member 6. The outer sides of the first synchronous wheel 724 and the second synchronous wheel 725 are jointly fitted with a synchronous belt 726. A protective cover 13 is installed on one side of the ear plate 12 to protect the first bevel gear 721 and the second bevel gear 723. The protective cover 13 is detachably fixed to the lower surface of the fixed crossbeam 1 by screws. The outer sides of the first synchronous wheel 724, the second synchronous wheel 725 and the synchronous belt 726 are fitted with a second protective cover 727.

[0044] Specifically, when the drive wheel 4 drives the horizontal shaft 5 to rotate, the horizontal shaft 5 drives the second synchronous wheel 725 on its outer side to rotate. Under the action of the synchronous belt 726, the first synchronous wheel 724 rotates synchronously with the second synchronous wheel 725, thereby driving the movable rod 722 and the second bevel gear 723 to rotate. Since the first bevel gear 721 meshes with the second bevel gear 723, the second bevel gear 723 also begins to rotate. The second bevel gear 723 drives the side brush 7 to rotate through the telescopic shaft 71, thereby achieving effective pre-cleaning of the material on both sides of the working surface of the conveyor belt 100.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A passive reverse belt cleaner for a belt conveyor, characterized in that: The assembly includes a fixed crossbeam (1) installed on the rear side of the head frame column (400), two drive wheels (4) abutting the bottom surface of the conveyor belt (100), a main brush (3), and two side brushes (7). Support arms (2) are fixedly connected to both the left and right ends of the rear side of the fixed crossbeam (1). An installation groove (21) is opened at the end of the support arm (2) away from the fixed crossbeam (1). The main brush (3) is located between the two support arms (2). A main shaft (31) is fixedly fixed horizontally through the inside of the main brush (3). The left and right ends of the main shaft (31) are rotatably connected to the support arm (2) on the corresponding side and pass through the rear end of the installation groove (21). The two drive wheels (4) are located on the side of the two support arms (2) away from the main brush (3). A horizontal shaft (5) is fixedly fixed horizontally through the center of each of the two drive wheels (4). The ends of the two horizontal shafts (5) that are close to each other are fixedly connected horizontally. The two horizontal shafts (5) are rotatably connected to the support arm (2) on the corresponding side and pass through the front end of the mounting groove (21). The mounting groove (21) is connected to a transmission component (32) for driving the main shaft (31) to rotate in the opposite direction relative to the horizontal shaft (5). The two horizontal shafts (5) are fixed to the head frame beam (500) by the support member (6). The two side brushes (7) are located on the left and right sides above the fixed beam (1). The lower center of the two side brushes (7) is connected to a telescopic shaft (71). The lower end of the telescopic shaft (71) rotates through the fixed beam (1). The lower end of the telescopic shaft (71) is connected to the horizontal shaft (5) by the transmission component (72). The main brush (3) and the side brush (7) are located between the head wheel (200) and the expansion roller (300) of the belt conveyor and above the discharge chute (600).

2. The passive reverse belt cleaner for a belt conveyor according to claim 1, characterized in that, The transmission assembly (32) includes a gear 1 (321) and a gear 2 (322) installed inside the mounting groove (21) and meshing with each other. The gear 1 (321) is fixedly sleeved on the end of the main shaft (31), and the gear 2 (322) is fixedly sleeved on the end of the horizontal shaft (5) away from the support (6). The upper opening of the mounting groove (21) is detachably fastened with a cover (22).

3. A passive reverse belt cleaner for a belt conveyor according to claim 1, characterized in that, A rubber ring is fitted on the outside of the drive wheel (4).

4. A passive reverse belt cleaner for a belt conveyor according to claim 1 or 3, characterized in that, The support member (6) includes a movable seat (61) and a threaded rod (62). The movable seat (61) is rotatably sleeved on the end of the horizontal shaft (5) away from the support arm (2). The threaded rod (62) is fixedly connected to the upper end of the movable seat (61). The top end of the threaded rod (62) movably passes through the side stiffener plate of the head frame crossbeam (500). Two sets of locking nuts (63) are threaded on the outer side of the threaded rod (62). The two sets of locking nuts (63) respectively abut against the upper and lower surfaces of the side stiffener plate of the head frame crossbeam (500).

5. A passive reverse belt cleaner for a belt conveyor according to claim 1, characterized in that, The telescopic shaft (71) includes an extension rod (711) and a sleeve (712). The extension rod (711) is fixedly connected to the center of the lower surface of the side brush (7). The sleeve (712) is slidably sleeved on the lower outer side of the extension rod (711) and the two are fixed together by a fixing pin (713).

6. A passive reverse belt cleaner for a belt conveyor according to claim 5, characterized in that, The side wall of the extension rod (711) has multiple sets of through-holes (7111) that are equidistant from front to back along the longitudinal direction. The upper end of the side wall of the sleeve (712) has a through-hole (7121) that is through from front to back. The fixing pin (713) is a bolt. The fixing pin (713) passes through the through-hole (7121) on one side of the sleeve (712), the fixing hole (7111) at the corresponding position on the side wall of the extension rod (711), and the through-hole (7121) on the other side of the sleeve (712). The end of the fixing pin (713) is threaded with a fixing nut (7131).

7. A passive reverse belt cleaner for a belt conveyor according to claim 5, characterized in that, The transmission assembly two (72) includes a bevel gear one (721) and a movable rod (722). The bevel gear one (721) is fixedly connected to the lower end of the sleeve (712). Ear plates (12) are fixedly connected to both the left and right sides of the lower surface of the fixed crossbeam (1). The ear plates (12) are located on the side of the bevel gear one (721) near the end of the fixed crossbeam (1). The movable rod (722) rotates laterally through the ear plate (12) on the corresponding side. The movable rod (722) is located near the bevel gear one (721). A bevel gear two (723) is fixedly sleeved at one end, and bevel gear one (721) meshes with bevel gear two (723). A synchronous pulley one (724) is fixedly sleeved at one end of the movable rod (722) near the end of the fixed crossbeam (1). A synchronous pulley two (725) is fixedly sleeved on the outside of the cross shaft rod (5). The synchronous pulley two (725) is located between the drive wheel (4) and the support member (6). A synchronous belt (726) is sleeved on the outside of the synchronous pulley one (724) and the synchronous pulley two (725).

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