An adjustable heavy-duty carrier roller wide belt sander
Patent Information
- Application Number
- CN202522010239.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-18
- Publication Date
- 2026-08-21
- Estimated Expiration
- 2035-09-18
AI Technical Summary
[0003]为克服上述缺陷，本实用新型提供了一种可调重型托辊的宽带砂光机，解决了现有设备在加工过程中粉尘收集不彻底以及对较长板材缺乏灵活有效支撑导致的加工精度低、作业环境差的技术问题
1、在本装置中，通过吸尘机构的设置，能够对砂光加工区域的进料口和出料口进行抽吸，使得大幅减少粉尘扩散，既保护了操作人员的身体健康，又能够一定程度上降低粉尘附着在设备部件和板材表面，保证了设备的运行精度和板材的打磨质量。
Smart Images
Figure CN224659031U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wide-band sander technology, specifically to a wide-band sander with adjustable heavy-duty idler rollers. Background Technology
[0002] Wide-belt sanders are key equipment in the sheet metal processing industry for surface polishing, especially when processing thick and heavy sheets, where adjustable heavy-duty rollers effectively ensure conveying stability. However, existing wide-belt sanders with adjustable heavy-duty rollers still have some shortcomings in practical use. For example, it is inconvenient to handle the dust generated during sanding. This dust not only permeates the working environment, endangering the respiratory health of operators, but may also adhere to the transmission components, roller surfaces, and sheet processing surfaces, affecting the normal operating accuracy of the equipment and the polishing quality of the sheets. In addition, when processing long sheets, the part of the sheet extending beyond the sander body lacks effective support and is prone to sagging and bending due to its own weight. This causes the sheet to shift and vibrate during conveying and polishing, affecting the flatness of the polished surface and potentially colliding with equipment components, resulting in sheet damage or equipment malfunction. Utility Model Content
[0003] To overcome the above-mentioned defects, this utility model provides a wide-band sander with adjustable heavy-duty idlers, which solves the technical problems of low processing accuracy and poor working environment caused by incomplete dust collection and lack of flexible and effective support for long boards in existing equipment.
[0004] According to one aspect, at least one embodiment of the present invention provides a wide belt sander with adjustable heavy-duty idler rollers, comprising: a frame, a mounting frame fixedly installed at the top of the frame, a wide belt sander body fixedly installed inside the mounting frame, and an adjustable idler roller mechanism installed inside the frame; A dust collection mechanism is installed on the outer walls of both sides of the mounting frame. The dust collection mechanism includes a dust collection hood, a dust collection fan, a T-junction, and a dust collection box. Dust collection hoods are fixedly installed on both outer walls of the mounting frame. A dust collection fan is fixedly installed on the top of the mounting frame. A T-junction is fixedly installed on the top of the mounting frame at the front end of the dust collection fan. A dust collection box is fixedly installed on the top of the mounting frame to the left of the dust collection fan.
[0005] For example, in a wide-band sander with adjustable heavy-duty idler rollers provided in at least one embodiment of the present invention, the dust collection mechanism further includes: a first connecting pipe, a second connecting pipe, and a third connecting pipe; the output end of the dust collection fan is sealed to the first connecting pipe; the other end of the first connecting pipe extends into the dust collection box; the input end of the dust collection fan is sealed to the second connecting pipe; the other end of the second connecting pipe is sealed to the tee; the top ends of both sets of dust collection hoods are sealed to the third connecting pipe; and the other ends of both sets of third connecting pipes are sealed to the tee.
[0006] For example, in a wide-band sander with adjustable heavy-duty idler rollers provided in at least one embodiment of the present invention, a flexible shielding curtain is fixedly installed at the edge of the outer wall of each set of dust collection hoods.
[0007] For example, in a wide-band sander with adjustable heavy-duty idler rollers provided in at least one embodiment of this utility model, the adjustable idler roller mechanism includes a U-shaped frame, a rotating shaft, a cavity, an idler roller, a first toothed pulley, a first toothed synchronous belt, a clearance groove, and a first motor. The frame is provided with a U-shaped frame inside, and several sets of rotating shafts are rotatably mounted in an equidistant array inside the U-shaped frame. A cavity is opened on the inner wall of the front end of the U-shaped frame. The front end of each set of rotating shafts is rotatably connected to the inner wall of the front end of the cavity. An idler roller is fixedly mounted on each set of rotating shafts. A first toothed pulley is fixedly mounted on two adjacent sets of rotating shafts located inside the cavity. A first toothed synchronous belt is installed between two adjacent sets of first toothed pulleys and is connected by transmission through the first toothed synchronous belt. A clearance groove is opened on the right side of the front end of the frame. A first motor is fixedly mounted on the outer wall of the front end of the U-shaped frame at the position of the clearance groove. The output end of the first motor is fixedly connected to one of the sets of rotating shafts.
[0008] For example, in a wide-band sander with adjustable heavy-duty idler rollers provided in at least one embodiment of this utility model, the adjustable idler roller mechanism further includes: a first chute, a threaded rod, a second toothed pulley, a second toothed synchronous belt, and a second motor; a first chute is vertically provided at the middle position of the inner wall of both the front and rear ends of the frame; a threaded rod is rotatably installed inside each set of the first chute; both the front and rear ends of the U-shaped frame are slidably connected to the first chute and threadedly connected to the threaded rod at the corresponding position; the bottom ends of both sets of threaded rods extend to the outside of the bottom end of the frame and are fixedly installed with a second toothed pulley; a second toothed synchronous belt is installed between the two sets of second toothed pulleys and is connected by transmission through the second toothed synchronous belt; a second motor is fixedly installed at the bottom end of the frame, and the output end of the second motor is fixedly connected to one of the sets of threaded rods.
[0009] For example, in a wide-band sander with adjustable heavy-duty idler rollers provided in at least one embodiment of the present invention, a second sliding groove is vertically provided on the inner wall of the front and rear ends of the frame, and a stabilizing rod is fixedly installed inside each set of the second sliding groove. The front and rear ends of the U-shaped frame are slidably connected to the second sliding groove and slidably connected to the stabilizing rod at the corresponding position.
[0010] For example, in a wide-band sander with adjustable heavy-duty idler rollers provided in at least one embodiment of the present invention, the following is also included: an installation cavity is provided on the left side of the U-shaped frame, a support plate is slidably installed inside the installation cavity, a handle is fixedly installed on the outer left side of the support plate, a bracket is fixedly installed on the top left side of the support plate, a roller is rotatably installed on the bracket, and the top of the roller is flush with the top of the idler roller.
[0011] For example, in a wide-band sander with adjustable heavy-duty idler rollers provided in at least one embodiment of the present invention, a support pad is fixedly installed at each of the four corners of the bottom end of the frame, and a PLC controller is fixedly installed on the outer wall of the front end of the mounting frame.
[0012] The beneficial effects of the embodiments of this utility model are as follows: 1. In this device, the dust extraction mechanism can suck up the inlet and outlet of the sanding area, which greatly reduces the spread of dust. This not only protects the health of the operators, but also reduces the amount of dust adhering to the equipment parts and the surface of the sheet, thus ensuring the operating accuracy of the equipment and the sanding quality of the sheet.
[0013] 2. In this device, the adjustable roller mechanism allows for convenient adjustment of the distance between the workpiece and the fixed sanding belt, thereby precisely controlling the sanding thickness. It is especially suitable for workpieces with strict requirements for sanding amount. It can not only quickly adapt to workpieces of different thicknesses, but also reduce positioning errors caused by frequent sanding belt adjustments.
[0014] 3. In this device, the installation cavity, support plate, handle, bracket and roller are designed to allow for flexible adjustment of the support range according to the extension length of the long plate, effectively supporting the extended part, preventing the plate from sagging or shifting due to its own weight, ensuring the plate remains stable during the grinding process, reducing vibration and collision, and improving the flatness of the long plate and the processing safety. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.
[0016] Figure 1 This is a schematic diagram of the structure of a wide-band sander with adjustable heavy-duty idler rollers in one embodiment of the present invention; Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a schematic cross-sectional view of the present invention. Figure 4 This is a top view sectional structural diagram of the present invention; Figure 5 This utility model Figure 4 Enlarged structural diagram at point B; Figure 6 This is a schematic diagram of the structure of this utility model viewed from below.
[0017] In the diagram: 1. Frame; 2. Mounting frame; 3. U-shaped frame; 4. Shaft; 5. Cavity; 6. Idler roller; 7. First toothed pulley; 8. First toothed synchronous belt; 9. Clearance groove; 10. First motor; 11. First slide groove; 12. Threaded rod; 13. Second toothed pulley; 14. Second toothed synchronous belt; 15. Second motor; 16. Second slide groove; 17. Stabilizing rod; 18. Wide-band sander body; 19. Dust hood; 20. Dust suction fan; 21. T-joint; 22. Dust collection box; 23. First connecting pipe; 24. Second connecting pipe; 25. Third connecting pipe; 26. Flexible shielding curtain; 27. Mounting cavity; 28. Support plate; 29. Handle; 30. Bracket; 31. Roller; 32. Support pad; 33. PLC controller. Detailed Implementation The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.
[0018] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0019] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0021] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and simplification of operation, 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 this utility model.
[0022] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0023] like Figures 1-6 As shown, it illustrates a wide-band sander with adjustable heavy-duty idler rollers in one embodiment of the present invention, comprising: a frame 1, a mounting frame 2 fixedly installed at the top of the frame 1, a wide-band sander body 18 fixedly installed inside the mounting frame 2, and an adjustable idler roller mechanism installed inside the frame 1. The dust collection mechanism is installed on the outer walls of both sides of the mounting frame 2. The dust collection mechanism includes a dust collection hood 19, a dust collection fan 20, a T-junction 21, and a dust collection box 22. The dust collection hood 19 is fixedly installed on both outer walls of the mounting frame 2. The dust collection fan 20 is fixedly installed on the top of the mounting frame 2. The T-junction 21 is fixedly installed on the top of the mounting frame 2 at the front end of the dust collection fan 20. The dust collection box 22 is fixedly installed on the top of the mounting frame 2 at the left side of the dust collection fan 20.
[0024] For example, such as Figure 2 As shown, the vacuuming mechanism also includes a first connecting pipe 23, a second connecting pipe 24, and a third connecting pipe 25. The output end of the vacuuming fan 20 is sealed to the first connecting pipe 23, and the other end of the first connecting pipe 23 extends into the dust collection box 22. The input end of the vacuuming fan 20 is sealed to the second connecting pipe 24, and the other end of the second connecting pipe 24 is sealed to the tee 21. The top ends of both sets of vacuum hoods 19 are sealed to the third connecting pipe 25, and the other ends of both sets of third connecting pipes 25 are sealed to the tee 21. A flexible shielding curtain 26 is fixedly installed at the edge of the outer wall of each set of vacuum hoods 19.
[0025] In this device, the dust extraction mechanism can suck up the inlet and outlet of the sanding area, which greatly reduces dust diffusion. This not only protects the health of the operators, but also reduces the amount of dust adhering to the equipment parts and the surface of the sheet metal, ensuring the operating accuracy of the equipment and the sanding quality of the sheet metal. In addition, the flexible shielding curtain 26 is fixedly installed at the outer edge of each dust extraction hood 19, which further reduces the diffusion of dust.
[0026] For example, such as Figure 5 As shown, the adjustable idler mechanism includes a U-shaped frame 3, a rotating shaft 4, a cavity 5, an idler 6, a first toothed pulley 7, a first toothed synchronous belt 8, a clearance groove 9, and a first motor 10. The frame 1 is equipped with a U-shaped frame 3. Several sets of rotating shafts 4 are rotatably mounted in an equidistant array inside the U-shaped frame 3. A cavity 5 is opened on the inner wall of the front end of the U-shaped frame 3. The front end of each set of rotating shafts 4 is rotatably connected to the inner wall of the front end of the cavity 5. An idler 6 is fixedly mounted on each set of rotating shafts 4. A first toothed pulley 7 is fixedly mounted on two adjacent sets of rotating shafts 4 inside the cavity 5. A first toothed synchronous belt 8 is installed between two adjacent sets of first toothed pulleys 7 and is connected by transmission through the first toothed synchronous belt 8. A clearance groove 9 is opened on the right side of the front end of the frame 1. A first motor 10 is fixedly mounted on the outer wall of the front end of the U-shaped frame 3 at the position of the clearance groove 9. The output end of the first motor 10 is fixedly connected to one of the sets of rotating shafts 4.
[0027] For example, such as Figure 6As shown, the adjustable idler mechanism also includes a first chute 11, a threaded rod 12, a second toothed pulley 13, a second toothed synchronous belt 14, and a second motor 15. The first chute 11 is vertically opened at the middle position of the inner wall of both the front and rear ends of the frame 1. A threaded rod 12 is rotatably installed inside each set of first chute 11. The front and rear ends of the U-shaped frame 3 are slidably connected to the first chute 11 and threadedly connected to the threaded rod 12 at the corresponding position. The bottom ends of the two sets of threaded rods 12 extend to the outside of the bottom end of the frame 1 and are fixedly installed with the second toothed pulley 13. A second toothed synchronous belt 14 is installed between the two sets of second toothed pulleys 13 and is connected by transmission through the second toothed synchronous belt 14. A second motor 15 is fixedly installed at the bottom end of the frame 1, and the output end of the second motor 15 is fixedly connected to one of the sets of threaded rods 12.
[0028] The adjustable roller mechanism eliminates the need to adjust the sanding belt position; simply adjusting the height of the roller 6 allows for quick adaptation to workpieces of different thicknesses, reducing positioning errors caused by frequent sanding belt adjustments. The fixed and adjustable roller configuration of the wide-band sander eliminates the need for repeated calibration of the sanding belt's level and verticality, reducing operational difficulty and improving efficiency during material changes or adjustments. Furthermore, it avoids wear and tear on mechanical parts caused by frequent sanding belt adjustments, extending the sanding belt's lifespan and reducing equipment maintenance costs.
[0029] For example, such as Figure 4 As shown, the inner walls at both ends of the frame 1 are vertically provided with second sliding grooves 16. Each set of second sliding grooves 16 is fixedly installed with a stabilizing rod 17. The front and rear ends of the U-shaped frame 3 are slidably connected to the second sliding grooves 16 and slidably connected to the stabilizing rods 17 at the corresponding positions.
[0030] The second slide 16 and the stabilizing rod 17 make the stability higher when the second motor 15 drives the U-shaped frame 3 to lift, thus ensuring the processing quality of the board to a certain extent.
[0031] For example, such as Figure 1 As shown, support pads 32 are fixedly installed at the four corners of the bottom of the frame 1, and a PLC controller 33 is fixedly installed on the outer wall of the front end of the mounting bracket 2.
[0032] In some examples, when using this device, the operator first places the sheet material to be processed on the idler roller 6, and then starts the first motor 10 to drive the rotating shaft 4 to rotate. Since two adjacent sets of rotating shafts 4 are each fixedly equipped with a first toothed pulley 7, and the two adjacent sets of first toothed pulleys 7 are connected by a first toothed synchronous belt 8, starting the first motor 10 can drive the idler roller 6 to move the sheet material to be processed toward the wide-band sander body 18. Before processing, the operator can start the second motor 15 to drive the threaded rod 12 to rotate. Since the two sets of threaded rods 12 are each fixedly equipped with a second toothed pulley 13, and are connected by a second toothed synchronous belt 14, starting the second motor 15 can drive the two sets of threaded rods 12 to rotate synchronously, thereby driving the idler roller 6 to rise and fall. The machine allows for convenient adjustment of the distance between the workpiece and the wide belt sander body, enabling precise control of the sanding thickness. It is particularly suitable for workpieces with strict requirements on sanding volume, quickly adapting to workpieces of different thicknesses and reducing positioning errors caused by frequent belt adjustments. Furthermore, during processing, the operator can activate the dust extraction fan 20 to suck up dust generated during processing via the dust extraction hood 19 and the third connecting pipe 25. The dust extraction hoods 19, fixedly installed on both outer walls of the mounting frame 2, effectively extract dust from the inlet and outlet of the sanding area, significantly reducing dust diffusion. This protects the operator's health and minimizes dust adhesion to equipment components and workpiece surfaces, ensuring the machine's operational accuracy and the quality of workpiece sanding.
[0033] like Figure 3 As shown, it illustrates a wide-band sander with adjustable heavy-duty idler rollers in another embodiment of the present invention. The U-shaped frame 3 has an installation cavity 27 on the left side, and a support plate 28 is slidably installed inside the installation cavity 27. A handle 29 is fixedly installed on the outer left side of the support plate 28, and a bracket 30 is fixedly installed on the top left side of the support plate 28. A roller 31 is rotatably installed on the bracket 30, and the top of the roller 31 is flush with the top of the idler roller 6.
[0034] In some examples, when processing long plates, the operator can pull the support plate 28 out of the mounting cavity 27 by pulling the handle 29 and flexibly adjust the support range according to the extension length of the long plate to effectively lift the extension part, prevent the plate from sagging or shifting due to its own weight, ensure that the plate remains stable during the grinding process, reduce vibration and collision, and improve the grinding flatness and processing safety of long plates.
[0035] It should be noted that the PLC controller 33 is an S7-200SMART, used to control the operating status and other parameters of various electrically driven components in the device. The first motor 10 is a MELSERVO-J4, the second motor 15 is a JGY-370, and the vacuum cleaner fan 20 is a 4-72-4.5A. All of the above electrical components are existing devices or equipment, or devices or equipment that can be implemented with existing technology. Their power supply, specific composition and principle are clear to those skilled in the art, so they will not be described in detail.
[0036] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A wide-band sander with adjustable heavy-duty idler rollers, characterized in that, include: A frame (1) is fixedly mounted on the top of the frame (1), and a wide-band sander body (18) is fixedly mounted inside the mounting frame (2). An adjustable roller mechanism is installed inside the frame (1). The dust collection mechanism is installed on the outer walls of both sides of the mounting frame (2). The dust collection mechanism includes a dust collection hood (19), a dust collection fan (20), a three-way valve (21), and a dust collection box (22). The dust collection hood (19) is fixedly installed on both outer walls of the mounting frame (2). The dust collection fan (20) is fixedly installed at the top of the mounting frame (2). The three-way valve (21) is fixedly installed at the front end of the dust collection fan (20) at the top of the mounting frame (2). The dust collection box (22) is fixedly installed at the left side of the dust collection fan (20) at the top of the mounting frame (2). The adjustable idler mechanism includes a U-shaped frame (3), a rotating shaft (4), a cavity (5), an idler (6), a first toothed pulley (7), a first toothed synchronous belt (8), a clearance groove (9), and a first motor (10). The frame (1) is equipped with a U-shaped frame (3). Several sets of rotating shafts (4) are rotatably mounted in an equidistant array inside the U-shaped frame (3). A cavity (5) is opened on the inner wall of the front end of the U-shaped frame (3). The front end of each set of rotating shafts (4) is rotatably connected to the inner wall of the front end of the cavity (5). An idler is fixedly mounted on each set of rotating shafts (4). Roller (6), two adjacent sets of rotating shafts (4) located inside the cavity (5) are fixedly installed with first toothed pulleys (7), and two adjacent sets of first toothed pulleys (7) are connected by a first toothed synchronous belt (8). The frame (1) has a clearance groove (9) on the right side of the front end. A first motor (10) is fixedly installed on the outer wall of the front end of the U-shaped frame (3) at the clearance groove (9). The output end of the first motor (10) is fixedly connected to one of the sets of rotating shafts (4). The adjustable idler mechanism also includes a first chute (11), a threaded rod (12), a second toothed pulley (13), a second toothed synchronous belt (14), and a second motor (15). The first chute (11) is vertically opened at the middle position of the inner wall of both the front and rear ends of the frame (1). A threaded rod (12) is rotatably installed inside each set of the first chute (11). The front and rear ends of the U-shaped frame (3) are slidably connected to the first chute (11) and threadedly connected to the threaded rod (12) at the corresponding position. The bottom ends of the two sets of threaded rods (12) extend to the outside of the bottom end of the frame (1) and are fixedly installed with the second toothed pulley (13). A second toothed synchronous belt (14) is installed between the two sets of second toothed pulleys (13) and is connected by transmission through the second toothed synchronous belt (14). A second motor (15) is fixedly installed at the bottom end of the frame (1), and the output end of the second motor (15) is fixedly connected to one of the sets of threaded rods (12).
2. A wide-band sander with adjustable heavy-duty idler rollers according to claim 1, characterized in that, The dust collection mechanism also includes a first connecting pipe (23), a second connecting pipe (24) and a third connecting pipe (25). The output end of the dust collection fan (20) is sealed to the first connecting pipe (23), and the other end of the first connecting pipe (23) extends into the dust collection box (22). The input end of the dust collection fan (20) is sealed to the second connecting pipe (24), and the other end of the second connecting pipe (24) is sealed to the tee (21). The top ends of both sets of dust collection hoods (19) are sealed to the third connecting pipe (25), and the other ends of both sets of third connecting pipes (25) are sealed to the tee (21).
3. A wide-band sander with adjustable heavy-duty idler rollers according to claim 1, characterized in that, A flexible shielding curtain (26) is fixedly installed at the edge of the outer wall of each set of vacuum hoods (19).
4. A wide-band sander with adjustable heavy-duty idler rollers according to claim 1, characterized in that, The frame (1) is provided with a second sliding groove (16) on the inner wall at both ends. Each set of second sliding grooves (16) is fixedly installed with a stabilizing rod (17). The front and rear ends of the U-shaped frame (3) are slidably connected to the second sliding groove (16) and slidably connected to the stabilizing rod (17) at the corresponding position.
5. A wide-band sander with adjustable heavy-duty idler rollers according to claim 1, characterized in that, The U-shaped frame (3) has an installation cavity (27) on its left side. A support plate (28) is slidably installed inside the installation cavity (27). A handle (29) is fixedly installed on the outer left side of the support plate (28). A bracket (30) is fixedly installed on the top left side of the support plate (28). A roller (31) is rotatably installed on the bracket (30). The top of the roller (31) is flush with the top of the idler roller (6).
6. A wide-band sander with adjustable heavy-duty idler rollers according to claim 1, characterized in that, Support pads (32) are fixedly installed at the four corners of the bottom of the frame (1), and a PLC controller (33) is fixedly installed on the outer wall of the front end of the mounting bracket (2).