A sanding machine sand belt tension automatic compensation device

Abstract

The utility model discloses a sanding machine abrasive band tension force automatic compensation device, including bearing plate and bearing frame, the top of bearing plate is provided with bearing frame, and the top of bearing plate one side of bearing frame is provided with liquid storage tank, the one end of bearing frame is provided with workstation, and the other end of bearing frame is provided with first servo motor, and the output of first servo motor is provided with drive wheel, the sidewall of bearing frame one side is provided with tension arm, and the one end of tension arm near bearing frame is provided with movable shaft, and the tension arm passes movable shaft and bearing frame swing joint, the sidewall of tension arm is swingly installed with tension pulley, the top of bearing frame is provided with the connection buckle. The utility model not only realized sanding machine abrasive band tension force automatic real -time compensation, ensured that sanding machine abrasive band was always in moderate taut state in polishing process, facilitated the flexible adjustment of the multi -angle polishing of special -shaped work piece, and the operation safety and processing adaptability were improved.

Description

Technical Field

[0001] This utility model relates to the technical field of compensation devices, specifically an automatic compensation device for the tension of the sanding belt in a sander. Background Technology

[0002] A sander is a device that uses sanding belts or sandpaper to sand the surface of workpieces. It is mainly used in furniture, automobile manufacturing, and engineered wood processing. This equipment comes in three types: roller type, belt type, and disc type. The roller type uses a roller with sandpaper wound around it for edge sanding; the belt type uses a ring-shaped sanding belt for large-area, high-efficiency processing; and the disc type uses sandpaper on a rotating disc to complete fine sanding of edges and corners. Sanding belts are the core components of sanders. Sanding belts are coated abrasives made of flexible materials such as paper and cloth as the base material and abrasives fixed by adhesive. They consist of a base material, abrasives and adhesives, and are mainly used for grinding and polishing materials such as metal, wood and plastics. They have the characteristics of strong adaptability and high safety. After prolonged use, the sanding belt on the surface of a sander will become loose under external force. If the sanding belt is loose, it will cause uneven grinding of the workpiece, resulting in a decrease in grinding quality. In order to ensure that the sanding belt is always in a taut state, the traditional method is to set up a tensioning device. However, the traditional tensioning device is mostly manually adjustable. Each time adjustment is needed, the machine must be stopped and manual adjustment is required, which is inconvenient and inefficient. In order to improve this situation, an automatic compensation device for sanding belt tension of a sander is proposed.

[0003] As disclosed in the patent announcement CN219027036U, a polishing machine oscillating sanding belt adjustment device includes a bracket, a slide rail on the upper surface of the bracket, a screw on the slide rail, a slider on the screw, the slider being located between two vertical plates of the slide rail, a pad fixed on the slider, a bidirectional cylinder on the pad, a fixing plate on one side of the pad, an oscillating top plate fixed on the fixing plate, the pad and the bidirectional cylinder being located between two vertical plates of the oscillating top plate, the two output ends of the bidirectional cylinder being respectively connected to the two vertical plates of the oscillating top plate, a steel rod connected to the fixing plate, and two parallel rubber rollers connected to the bracket, the steel rod and the two rubber rollers forming a triangular structure, with a sanding belt sleeved on the outside; Although it achieves the goal of moving the slider within the slide rail by rotating the screw, adjusting the position of the bidirectional cylinder, and placing the bidirectional cylinder in the middle of the steel rod, the deviation phenomenon of the bidirectional cylinder gradually disappears during the swing of the steel rod, ensuring the polishing effect of the sanding belt on the aluminum plate. However, the existing compensation device does not solve the problem that it is not conducive to automatic real-time compensation of the tension of the sanding belt during use, nor to flexible adjustment of multi-angle grinding of irregular workpieces, which affects the uniformity of grinding and the polishing effect. Summary of the Invention

[0004] The purpose of this utility model is to provide an automatic compensation device for the tension of the sanding belt in a sander, so as to solve the problem in the background art that the compensation device is not convenient for automatic real-time compensation of the tension of the sanding belt, which is not conducive to the flexible adjustment of multi-angle grinding of irregular workpieces, and affects the uniformity of grinding and the polishing effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic compensation device for the tension of a sander belt, comprising a support plate and a support frame. The support frame is mounted on the top of the support plate, and a liquid storage tank is mounted on the top of the support plate on one side of the support frame. A worktable is mounted on one end of the support frame, and a first servo motor is mounted on the other end of the support frame. A drive wheel is mounted on the output end of the first servo motor. A tensioning arm is mounted on the side wall of one side of the support frame, and a movable shaft is mounted on the end of the tensioning arm near the support frame. The tensioning arm is movably connected to the support frame via the movable shaft. A tensioning wheel is movably mounted on the side wall of the tensioning arm. A connecting buckle is provided at the top of the support frame, and a tension spring is provided on the side wall of the connecting buckle, and the tension spring is connected to the tensioning arm. A hinge shaft is provided on the side wall of the support frame on one side of the tensioning arm, and an adjusting plate is movably mounted on the surface of the hinge shaft. A driven gear is movably mounted on the surface of the hinge shaft on one side of the adjusting plate. The driven gear is fixedly connected to the adjusting plate. A second servo motor is provided on the side wall of the support frame on the back of the adjusting plate, and a transmission gear is provided at the output end of the second servo motor, and the transmission gear meshes with the driven gear.

[0006] Preferably, the side wall of the adjustment plate is provided with two sets of limiting wheels, and the limiting wheels are movably connected to the adjustment plate.

[0007] Preferably, the surface of the drive wheel is provided with a sanding belt body, and the sanding belt body extends to the surface of the tension wheel and the limiting wheel.

[0008] Preferably, the top of the liquid storage tank is provided with an exhaust pipe, and a suction pump is provided on the top of the liquid storage tank on one side of the exhaust pipe.

[0009] Preferably, the input end of the suction pump is provided with a flexible hose, and an air collection hood is provided on the side wall of the support frame on one side of the workbench, and the air collection hood is connected to the flexible hose.

[0010] Preferably, the exhaust pipe is provided with a filter block inside, and the outer wall of the filter block is provided with multiple sets of equally spaced limiting blocks.

[0011] Preferably, the inner wall of the exhaust pipe is provided with multiple sets of L-shaped grooves at equal intervals, and the limiting block is slidably connected to the L-shaped grooves.

[0012] Preferably, a PLC controller is installed on the outer wall of the liquid storage tank, and the output terminal of the PLC controller is electrically connected to the input terminals of the suction pump, the first servo motor, and the second servo motor.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This compensation device not only realizes automatic real-time compensation of the sanding belt tension, ensuring that the sanding belt is always in a moderately taut state during the grinding process, thus improving the uniformity of grinding and polishing effect, but also facilitates flexible adjustment of multi-angle grinding of irregular workpieces. The position of the sanding belt can be adaptively changed by motor drive, reducing the need for manual hand adjustment and improving operational safety and processing adaptability. Moreover, the device integrates a dust extraction and filtration system, which can filter the dust generated during grinding through a water bath before discharge, effectively improving the working environment and reducing air pollution and health hazards. At the same time, its filter structure is simple in design and supports quick disassembly and replacement, further improving maintenance efficiency and practicality. (1) Before using the device, fill the storage tank with clean water, place the workpiece on the workbench surface and apply force to the workpiece so that the workpiece is attached to the surface of the sanding belt body. The first servo motor drives the drive wheel to rotate, and the drive wheel drives the sanding belt body to move. The sanding belt body grinds and polishes the workpiece. During the movement of the sanding belt body, the tension spring provides a tension force to the tension arm. The tension spring drives the tension arm to rotate upward around the movable shaft, and the tension arm drives the tension wheel to rotate upward. The tension wheel pulls the sanding belt body to tension the sanding belt body. The tension spring always provides a tension force to the tension arm, so the tension spring can automatically provide tension compensation to the sanding belt body in real time, thereby avoiding the need for frequent manual adjustment of the sanding belt body tension. When grinding an irregularly shaped workpiece, and it is inconvenient to manually adjust the workpiece angle, a second servo motor drives a transmission gear to rotate. The transmission gear, through a driven gear, drives an adjustment plate to rotate around a hinge shaft. The adjustment plate then drives a limit wheel to rotate, which in turn drives the sanding belt body to rotate, thereby adjusting the sanding and polishing position of the sanding belt body. This allows for adaptive sanding and polishing of workpieces with different angles, reducing the need for manual adjustment of the sanding angle by holding the workpiece, thus reducing the risk of injury. The above design can automatically and in real-time compensate for the tension of the sanding belt and flexibly adjust the sanding angle to adapt to different sanding positions of the workpiece, reducing the need for manual adjustment of the sanding angle by holding the workpiece, and improving the convenience and effectiveness of sanding. (2) Air is drawn into the gas collection hood by a suction pump through a flexible hose, creating a negative pressure environment inside the hood. This allows dust to be drawn into the liquid storage tank through the hood and flexible hose. The liquid storage tank contains clean water. The dust enters the tank with the air and reaches the bottom. Inside the tank, the dust comes into full contact with the water and dissolves. The air is then filtered through the filter block in the exhaust pipe before being discharged. This process effectively filters and discharges the dust, preventing direct dust emissions that could cause air pollution or harm to operators. However, the filter block may become clogged after prolonged use. When the filter needs to be replaced, simply rotate the filter block counterclockwise. The filter block will then move the limiting block into the L-shaped groove. When the limiting block rotates to the turning point of the L-shaped groove, pull the filter block upwards to remove it from the exhaust pipe. Then, replace it with a new filter block and reinstall it in the exhaust pipe. This design can filter and discharge dust generated during grinding and polishing, effectively preventing direct dust emissions that pollute the air and cause harm to operators. It also allows for quick disassembly and replacement of the filter block, improving the convenience of disassembly, replacement, and maintenance. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front view structural diagram of the present utility model; Figure 3 This is a three-dimensional structural diagram of the adjustment plate of this utility model; Figure 4 This is a three-dimensional perspective structural diagram of the tensioning arm of this utility model; Figure 5 This is a side view sectional structural diagram of the liquid storage tank of this utility model; Figure 6 This is a three-dimensional structural diagram of the exhaust pipe and filter block of this utility model.

[0015] In the diagram: 1. Liquid storage tank; 2. Support plate; 3. PLC controller; 4. Suction pump; 5. Exhaust pipe; 6. Flexible hose; 7. First servo motor; 8. Support frame; 9. Sanding belt body; 10. Workbench; 11. Gas collection hood; 12. Adjustment plate; 13. Drive wheel; 14. Tensioning arm; 15. Movable shaft; 16. Tension spring; 17. Tensioning wheel; 18. Limiting wheel; 19. Transmission gear; 20. Driven gear; 21. L-shaped groove; 22. Filter block; 23. Limiting block; 24. Second servo motor; 25. Connecting buckle; 26. Hinge shaft. Detailed Implementation

[0016] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0017] Please see Figure 1-6 This utility model provides an embodiment of an automatic compensation device for the tension of a sander belt, comprising a support plate 2 and a support frame 8. The support frame 8 is provided at the top of the support plate 2, and a liquid storage tank 1 is provided at the top of the support plate 2 on one side of the support frame 8. A worktable 10 is provided at one end of the support frame 8, and a first servo motor 7 is provided at the other end of the support frame 8. A drive wheel 13 is provided at the output end of the first servo motor 7. A tension arm 14 is provided on the side wall of one side of the support frame 8, and a movable shaft 15 is provided at the end of the tension arm 14 near the support frame 8. The tension arm 14 is movably connected to the support frame 8 through the movable shaft 15. The movable shaft 15 is provided on the side wall of the tension arm 14. The support frame 8 is equipped with a tensioning wheel 17, and a connecting buckle 25 is provided at the top of the support frame 8. A tension spring 16 is provided on the side wall of the connecting buckle 25 and is connected to the tensioning arm 14. A hinge shaft 26 is provided on the side wall of the support frame 8 on one side of the tensioning arm 14. An adjusting plate 12 is movably mounted on the surface of the hinge shaft 26. A driven gear 20 is movably mounted on the surface of the hinge shaft 26 on one side of the adjusting plate 12. The driven gear 20 is fixedly connected to the adjusting plate 12. A second servo motor 24 is provided on the side wall of the support frame 8 on the back of the adjusting plate 12. A transmission gear 19 is provided at the output end of the second servo motor 24 and meshes with the driven gear 20. Two sets of limiting wheels 18 are provided on the side wall of the adjusting plate 12, and the limiting wheels 18 are movably connected to the adjusting plate 12; The surface of the drive wheel 13 is provided with a sanding belt body 9, and the sanding belt body 9 extends to the surface of the tension wheel 17 and the limit wheel 18; In this utility model, the PLC controller 3 is a Siemens S7-200, which is a mature existing technology. Therefore, its internal structure, working principle, and connection and control method with the electrical components in this application will not be described in detail. Before using the device, clean water is injected into the storage tank 1. When it is necessary to grind the workpiece, the workpiece is placed on the surface of the worktable 10 and a force is applied to the workpiece so that it adheres to the surface of the sanding belt body 9. The first servo motor 7 is turned on, and the first servo motor 7 drives the drive wheel 13 to rotate. The tension wheel 17 and the two sets of limit wheels 18 support the rotation of the drive wheel 13. With the support, the drive wheel 13 drives the sanding belt body 9 to move, and the sanding belt body 9 grinds and polishes the workpiece. During the movement of the sanding belt body 9, the tension spring 16 provides a tension force to the tensioning arm 14. The tension spring 16 drives the tensioning arm 14 to rotate upward about the movable shaft 15, thereby driving the tensioning wheel 17 to rotate upward. The tensioning wheel 17 pulls the sanding belt body 9. With the limiting cooperation of the limit wheel 18 and the drive wheel 13, the sanding belt body 9 is tensioned. The tension spring 16 always provides a tension force to the tensioning arm 14, so the tension spring 16 can provide a tension force to the workpiece. 6. Automatically provides real-time tension compensation for the abrasive belt body 9, thus avoiding frequent manual adjustments to the tension of the abrasive belt body 9. When grinding irregularly shaped workpieces, and it is inconvenient to manually adjust the angle of the workpiece, the second servo motor 24 can be turned on. The second servo motor 24 drives the transmission gear 19 to rotate. Under the mutual meshing of the transmission gear 19 and the driven gear 20, the movable cooperation between the driven gear 20 and the hinge shaft 26, and the fixed connection between the driven gear 20 and the adjusting plate 12, the transmission gear 19 drives the adjusting plate 12 through the driven gear 20 to the hinge shaft 26. 6 is the axis of rotation, which is driven by the adjustment plate 12 to rotate the limit wheel 18. In turn, the two sets of limit wheels 18 can drive the sanding belt body 9 to rotate, thereby adjusting the grinding and polishing position of the sanding belt body 9. This allows for adaptive grinding and polishing of workpieces at different angles, reducing the need for manual adjustment of the grinding angle by holding the workpiece, which can indirectly reduce personnel injury. The above design can automatically and in real time compensate for the tension of the sanding belt and flexibly adjust the grinding angle to adapt to different grinding positions of the workpiece, reducing the need for manual adjustment of the grinding angle by holding the workpiece, and improving the convenience and effect of grinding. The top of the liquid storage tank 1 is provided with an exhaust pipe 5, and the top of the liquid storage tank 1 on one side of the exhaust pipe 5 is provided with a suction pump 4. The input end of the suction pump 4 is provided with a flexible hose 6, and a gas collection hood 11 is provided on the side wall of the support frame 8 on one side of the workbench 10, and the gas collection hood 11 is connected to the flexible hose 6. The exhaust pipe 5 is provided with a filter block 22 inside, and multiple sets of limit blocks 23 with equal spacing are provided on the outer wall of the filter block 22. Multiple sets of L-shaped grooves 21 with equal spacing are provided on the inner wall of the exhaust pipe 5, and the limit blocks 23 are slidably connected to the L-shaped grooves 21. A PLC controller 3 is installed on the outer wall of the liquid storage tank 1, and the output terminal of the PLC controller 3 is electrically connected to the input terminals of the suction pump 4, the first servo motor 7, and the second servo motor 24. Dust is generated during the grinding and polishing of workpieces. At this time, the suction pump 4 can be turned on, and air is drawn into the gas collection hood 11 through the flexible hose 6. A negative pressure environment is created inside the gas collection hood 11, allowing the dust to pass through the hood 11 and the flexible hose 6 into the liquid storage tank 1. The liquid storage tank 1 contains clean water. The dust, along with the air, enters and reaches the bottom of the liquid storage tank 1, where it comes into full contact with the water and dissolves. The air is then filtered through the filter block 22 in the exhaust pipe 5 before being discharged. This completes the filtration and discharge of dust, preventing direct dust emission that could cause air pollution and harm to operators. The filter block 22... After prolonged use, the filter block may become clogged. When it needs to be replaced, simply rotate the filter block 22 counterclockwise. The filter block 22 will drive the limiting block 23 to slide within the L-shaped groove 21. When the limiting block 23 rotates to the turning position of the L-shaped groove 21, pull the filter block 22 upward to remove it from the exhaust pipe 5. Then, replace it with a new filter block 22 and reinstall it back into the exhaust pipe 5. The above design can filter and discharge the dust generated by grinding and polishing, effectively preventing the direct emission of dust from polluting the air and causing harm to operators. The filter block can be quickly disassembled and replaced, improving the convenience of disassembly, replacement, and maintenance.

[0018] Working principle: Before using the device, fill the storage tank 1 with clean water. When grinding a workpiece, place the workpiece on the surface of the worktable 10 and apply force to the workpiece, causing it to adhere to the surface of the sanding belt body 9. The first servo motor 7 drives the drive wheel 13 to rotate, which in turn drives the sanding belt body 9 to move. The sanding belt body 9 then grinds and polishes the workpiece. During the movement of the sanding belt body 9, the tension spring 16 provides tension to the tension arm 14, which in turn drives the tension arm 14 to rotate upward about the movable shaft 15. This causes the tension arm 14 to drive the tension wheel 17 to rotate upward, thus allowing the tension wheel 17 to rotate upward. 7. The abrasive belt body 9 is tensioned by pulling it. The tension spring 16 always provides tension to the tensioning arm 14, so the tension spring 16 can automatically provide real-time tension compensation for the abrasive belt body 9, thus avoiding the need for frequent manual adjustment of the tension of the abrasive belt body 9. When the workpiece being ground is an irregularly shaped workpiece, and it is inconvenient to adjust the angle of the workpiece manually, the second servo motor 24 drives the transmission gear 19 to rotate. The transmission gear 19 drives the adjusting plate 12 to rotate around the hinge shaft 26 through the driven gear 20. The adjusting plate 12 drives the limit wheel 18 to rotate, and thus the two sets of limit wheels 18 can drive the abrasive belt body 9. Rotation adjusts the grinding and polishing position of the abrasive belt body 9, allowing for adaptive grinding and polishing of workpieces at different angles. This reduces the need for manual adjustment of the grinding angle by holding the workpiece, thus reducing the risk of injury. Air is drawn into the air collection hood 11 by the suction pump 4 through the flexible hose 6, creating a negative pressure environment. This allows dust to be drawn through the air collection hood 11 and the flexible hose 6 into the liquid storage tank 1, which contains clean water. The dust, carried by the air, enters the bottom of the liquid storage tank 1, where it comes into full contact with and dissolves in the water. The air is then filtered by the filter block 22 in the exhaust pipe 5. The exhaust pipe 5 filters and discharges dust, preventing direct dust emissions that could cause air pollution and harm to operators. Filter block 22 may become clogged after prolonged use. To replace it, simply rotate filter block 22 counterclockwise. This will cause limit block 23 to slide within the L-shaped groove 21. When limit block 23 reaches the turning point of the L-shaped groove 21, pull filter block 22 upwards to remove it from the exhaust pipe 5. Then, replace it with a new filter block 22 and reinstall it in the exhaust pipe 5. This concludes the usage instructions for the automatic belt tension compensation device on the sander.

[0019] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An automatic compensation device for the tension of the sanding belt in a sander, comprising a bearing plate (2) and a bearing frame (8), characterized in that: The top of the support plate (2) is provided with a support frame (8), and a liquid storage tank (1) is provided on the top of the support plate (2) on one side of the support frame (8). A workbench (10) is provided at one end of the support frame (8), and a first servo motor (7) is provided at the other end of the support frame (8). A drive wheel (13) is provided at the output end of the first servo motor (7). A tension arm (14) is provided on the side wall of one side of the support frame (8), and a movable shaft (15) is provided at the end of the tension arm (14) near the support frame (8). The tension arm (14) is movably connected to the support frame (8) through the movable shaft (15). A tension wheel (17) is movably installed on the side wall of the tension arm (14). A connecting rod is provided at the top of the support frame (8). A buckle (25) is provided on the side wall of the buckle (25), and a tension spring (16) is provided on the side wall of the tension arm (14). A hinge shaft (26) is provided on the side wall of the support frame (8) on one side of the tension arm (14), and an adjustment plate (12) is movably mounted on the surface of the hinge shaft (26). A driven gear (20) is movably mounted on the surface of the hinge shaft (26) on one side of the adjustment plate (12). The driven gear (20) is fixedly connected to the adjustment plate (12). A second servo motor (24) is provided on the side wall of the support frame (8) on the back of the adjustment plate (12), and a transmission gear (19) is provided at the output end of the second servo motor (24). The transmission gear (19) meshes with the driven gear (20).

2. The automatic compensation device for sanding belt tension of a sander according to claim 1, characterized in that: Two sets of limiting wheels (18) are provided on the side wall of the adjustment plate (12), and the limiting wheels (18) are movably connected to the adjustment plate (12).

3. The automatic compensation device for sanding belt tension of a sander according to claim 1, characterized in that: The surface of the drive wheel (13) is provided with a sanding belt body (9), and the sanding belt body (9) extends to the surface of the tension wheel (17) and the limit wheel (18).

4. The automatic compensation device for sanding belt tension of a sander according to claim 1, characterized in that: The top of the liquid storage tank (1) is provided with an exhaust pipe (5), and a suction pump (4) is provided on the top of the liquid storage tank (1) on one side of the exhaust pipe (5).

5. The automatic compensation device for sanding belt tension of a sander according to claim 4, characterized in that: The input end of the suction pump (4) is provided with a flexible hose (6), and a gas collection hood (11) is provided on the side wall of the support frame (8) on one side of the workbench (10), and the gas collection hood (11) is connected to the flexible hose (6).

6. The automatic compensation device for sanding belt tension of a sander according to claim 4, characterized in that: The exhaust pipe (5) is provided with a filter block (22) inside, and multiple sets of limit blocks (23) with equal spacing are provided on the outer wall of the filter block (22).

7. The automatic compensation device for sanding belt tension of a sander according to claim 4, characterized in that: The inner wall of the exhaust pipe (5) is provided with multiple sets of L-shaped grooves (21) at equal intervals, and the limiting block (23) is slidably connected to the L-shaped grooves (21).

8. The automatic compensation device for sanding belt tension of a sander according to claim 1, characterized in that: A PLC controller (3) is installed on the outer wall of the liquid storage tank (1), and the output terminal of the PLC controller (3) is electrically connected to the input terminals of the suction pump (4), the first servo motor (7), and the second servo motor (24).

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