Vertical belt sander

Abstract

The utility model discloses a vertical type abrasive belt grinding machine which comprises a machine frame, a clamping rotating mechanism and a vertical type abrasive belt grinding mechanism, the clamping rotating mechanism and the vertical type abrasive belt grinding mechanism are arranged on the machine frame, the clamping rotating mechanism is provided with a mounting base, a chuck, a clamping driving assembly and a rotating driving assembly, the chuck, the clamping driving assembly and the rotating driving assembly are arranged on the mounting base, and the clamping driving assembly can drive the chuck to open and close. The vertical abrasive belt grinding mechanism is provided with a rotary driving assembly and a rotary driving assembly, the rotary driving assembly can drive the chuck to rotate so that the chuck can drive the product to rotate, the vertical abrasive belt grinding mechanism is provided with a lifting driving module, a lifting base, an unwinding assembly, a winding assembly and a pressing cutter, and an abrasive belt output by the unwinding assembly reaches the winding assembly after passing through the pressing cutter. The upper surface of the product is polished in an automatic mode to form sand lines, the production efficiency is high, the production cost is reduced, and the polishing effect is better.

Description

Technical Field

[0001] This utility model relates to the field of grinding device technology, specifically to a vertical belt sander. Background Technology

[0002] The bezel is a component of the watch case, usually made of metal, and serves a decorative purpose. During production, the outer surface of the bezel needs to be polished to create a sandblasted texture, giving the bezel a hazy appearance.

[0003] Traditional watch bezel polishing is mainly done manually, with workers using a grinding wheel to rub and polish the outer surface of the bezel. However, manual methods are inefficient, resulting in high production costs and poor polishing results. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a vertical belt sander that uses an automated method to sand the upper surface of a product to create a sanding texture. This results in high production efficiency, reduced production costs, and better sanding effects.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A vertical belt sander includes a frame, a clamping and rotating mechanism, and a vertical belt sanding mechanism mounted on the frame. The clamping and rotating mechanism has a mounting base, and a chuck, a clamping drive assembly, and a rotating drive assembly mounted on the mounting base. The clamping drive assembly can drive the chuck to open and close, so that the chuck clamps or releases the product. The rotating drive assembly can drive the chuck to rotate, so that the chuck drives the product to rotate. The vertical belt sanding mechanism has a lifting drive module, a lifting seat, and an unwinding assembly, a winding assembly, and a pressure knife mounted on the lifting seat. The sanding belt output by the unwinding assembly passes through the pressure knife and reaches the winding assembly. The lifting drive module drives the lifting seat to move up and down relative to the chuck, so that the pressure knife abuts the lower surface of the sanding belt against the upper surface of the product.

[0007] By setting a clamping and rotating mechanism and a vertical belt sanding mechanism on the frame, the clamping and rotating mechanism has a mounting base, and a chuck, a clamping drive assembly, and a rotating drive assembly on the mounting base. The vertical belt sanding mechanism has a lifting drive module, a lifting seat, and an unwinding assembly, a winding assembly, and a pressure knife on the lifting seat. During production, the product is first clamped by the chuck, and then the lifting drive module drives the lifting seat to move downward so that the pressure knife presses the lower surface of the sanding belt against the upper surface of the product. The sanding belt output by the unwinding assembly passes through the pressure knife and reaches the winding assembly. At the same time, the rotating drive assembly drives the chuck to rotate, so that the sanding belt sands the upper surface of the product during the movement. This automated method sands the upper surface of the product to form a sanding texture, resulting in high production efficiency, reduced production costs, and better sanding effect.

[0008] As a preferred embodiment, the lifting base is equipped with a first sensor, a second sensor, a swing arm, and a reset component. The first sensor is located above the second sensor. The swing arm is rotatably connected to the lifting base and can swing back and forth between the first and second sensors. The swing arm is equipped with a guide wheel. The sanding belt output by the unwinding assembly passes through the guide wheel and then to the pressure knife. The reset component ensures that the swing arm always tends to rotate towards the second sensor. When the first sensor detects the swing arm, the unwinding assembly releases the sanding belt. When the second sensor detects the swing arm, the unwinding assembly stops releasing the sanding belt.

[0009] As a preferred embodiment, the lifting seat is provided with a first guide roller group and a second guide roller group. The sand belt output by the unwinding assembly passes through the first guide roller group, the pressure knife, and the second guide roller group in sequence before reaching the winding assembly.

[0010] As a preferred embodiment, the first guide roller group is provided with a plurality of first guide rollers, and the second guide roller group is provided with a plurality of second guide rollers, and the middle of the first guide roller and the second guide roller are provided with radially outwardly protruding arc-shaped protrusions.

[0011] As a preferred embodiment, the upper end of the chuck is provided with a plurality of elastic blocks spaced apart. The product can be fitted over the elastic blocks. When the clamping drive assembly drives the elastic blocks to disperse radially outward, the elastic blocks abut against the product, so that the chuck clamps the product.

[0012] As a preferred embodiment, the rotary drive assembly has a rotating shaft and a first drive member that drives the rotating shaft to rotate. The rotating shaft is rotatably connected to the mounting base. The chuck is located at the upper end of the rotating shaft and can rotate with the rotating shaft. The clamping drive assembly has a telescopic rod and a second drive member that drives the telescopic rod to extend and retract. Both the rotating shaft and the chuck are hollow structures. The telescopic rod can extend and retract and move through the rotating shaft and the chuck. The upper end of the telescopic rod is provided with a protrusion that pushes the elastic block outward so that the elastic block is radially dispersed outward.

[0013] As a preferred embodiment, the inner wall of the elastic block is provided with an inclined surface, which extends from top to bottom in a direction close to the central axis of the clamp, and the protrusion abuts against the inclined surface.

[0014] As a preferred embodiment, the second driving member has a push-drive unit and a thrust spring. The driving end of the second driving member abuts against the lower end of the telescopic rod. The thrust spring is sleeved on the telescopic rod. The lower end of the thrust spring abuts against a stop block on the telescopic rod. The upper end of the thrust spring abuts against a rotating shaft. The thrust spring causes the telescopic rod to always have a downward tendency.

[0015] As a preferred embodiment, the rotation center line of the chuck is inclined.

[0016] As a preferred embodiment, the mounting base is provided with a connecting hole, and the frame is provided with an arc-shaped hole corresponding to the connecting hole. The screw passes through the arc-shaped hole and the connecting hole in sequence to allow the mounting base to rotate and be adjusted to be mounted on the frame, and to adjust the tilt angle of the chuck.

[0017] Compared with the prior art, this utility model has significant advantages and beneficial effects. Specifically, by setting a clamping and rotating mechanism and a vertical sanding belt mechanism on the frame, the clamping and rotating mechanism has a mounting base, and a chuck, a clamping drive assembly, and a rotating drive assembly on the mounting base. The vertical sanding belt mechanism has a lifting drive module, a lifting seat, and an unwinding assembly, a winding assembly, and a pressure knife on the lifting seat. During production, the product is first clamped by the chuck, and then the lifting drive module drives the lifting seat to move downward so that the pressure knife presses the lower surface of the sanding belt against the upper surface of the product. The sanding belt output by the unwinding assembly passes through the pressure knife and reaches the winding assembly. At the same time, the rotating drive assembly drives the chuck to rotate, so that the sanding belt sands the upper surface of the product during the movement. Thus, the upper surface of the product is sanded to form a sanding texture in an automated way, which has high production efficiency, reduces production costs, and provides better sanding effect.

[0018] To more clearly illustrate the structural features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments: Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the assembly structure of an embodiment of the present utility model;

[0020] Figure 2 This is a side view schematic diagram of an embodiment of the present utility model;

[0021] Figure 3 This is an assembly diagram of the lifting seat, pressure knife, first guide roller, second guide roller, first sensor, second sensor and swing arm according to an embodiment of the present utility model;

[0022] Figure 4 Figure 3 A schematic diagram of the first working state;

[0023] Figure 5 Figure 3 Schematic diagram of the second working state;

[0024] Figure 6 This is a schematic diagram of the clamping and rotating mechanism according to an embodiment of the present invention;

[0025] Figure 7 This is a cross-sectional schematic diagram of the clamping and rotating mechanism according to an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached diagram:

[0027] 10-Frame; 11-Connecting hole; 20-Clamping and rotating mechanism; 21-Mounting base; 211-Arc-shaped hole; 22-Chuck; 221-Elastic block; 222-Arc-shaped positioning groove; 223-Inclined surface; 23-Clamping drive assembly; 231-Telescopic rod; 232-Second drive component; 233-Protrusion; 234-Bolt; 235-Stop; 236-Push drive unit; 237-Thrust spring; 24-Rotation drive assembly; 241-Rotating shaft; 242-First drive component; 243-Rotary motor; 244-Synchronous belt; 245-Synchronous belt pulley; 30-Vertical belt sander Structure; 31-Lifting drive module; 32-Lifting seat; 321-First sensor; 322-Second sensor; 323-Swing arm; 3231-Guide wheel; 324-Reset component; 325-Fiber optic sensor head; 33-Unwinding assembly; 331-Unwinding reel; 332-Unwinding motor; 34-Rewinding assembly; 341-Rewinding reel; 342-Rewinding motor; 35-Pressure knife; 36-Horizontal drive module; 37-First guide roller group; 371-First guide roller; 3711-Sensing wheel; 38-Second guide roller group; 381-Second guide roller; 39-Modible seat; 40-Product; 50-Sand belt. Detailed Implementation

[0028] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the position 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.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] like Figure 1-7 As shown, this utility model discloses a vertical belt sander, including a frame 10, a clamping and rotating mechanism 20 and a vertical belt sanding mechanism 30 disposed on the frame 10.

[0031] The clamping and rotating mechanism 20 has a mounting base 21, and a chuck 22, a clamping drive assembly 23, and a rotating drive assembly 24 disposed on the mounting base 21. The clamping drive assembly 23 can drive the chuck 22 to open and close, so that the chuck 22 clamps or releases the product 40. The rotating drive assembly 24 can drive the chuck 22 to rotate, so that the chuck 22 drives the product 40 to rotate.

[0032] The vertical belt sanding mechanism 30 includes a lifting drive module 31, a lifting seat 32, and an unwinding assembly 33, a winding assembly 34, and a pressure knife 35 mounted on the lifting seat 32. The sanding belt 50 output by the unwinding assembly 33 passes through the pressure knife 35 and reaches the winding assembly 34. The lifting drive module 31 drives the lifting seat 32 to move up and down relative to the chuck 22 so that the pressure knife 35 presses the lower surface of the sanding belt 50 against the upper surface of the product 40.

[0033] The vertical belt sanding mechanism 30 also has a horizontal drive module 36. The drive end of the horizontal drive module 36 is connected to the lifting drive module 31. The horizontal drive module 36 can drive the vertical belt sanding mechanism 30 to move closer to or further away from the chuck 22. By setting the horizontal drive module 36, the vertical belt sanding mechanism 30 is driven to move horizontally, thereby adjusting the horizontal position of the vertical belt sanding mechanism 30 relative to the chuck 22, making the sanding position of the pressure knife 35 on the product 40 more precise and improving the sanding effect.

[0034] The lifting drive module 31 and the horizontal drive module 36 can be driven by a lead screw and motor, a cylinder, a gear and rack, or a linear motor.

[0035] The unwinding assembly 33 has an unwinding reel 331 and an unwinding motor 332 that drives the unwinding reel 331 to rotate, and the winding assembly 34 has a winding reel 341 and a winding motor 342 that drives the winding reel 341 to rotate.

[0036] The lifting base 32 is equipped with a first sensor 321, a second sensor 322, a swing arm 323, and a reset member 324. The first sensor 321 is located above the second sensor 322. The swing arm 323 is rotatably connected to the lifting base 32 and can swing back and forth between the first sensor 321 and the second sensor 322. The swing arm 323 is equipped with a guide wheel 3231. The sanding belt 50 output by the unwinding assembly 33 passes through the guide wheel 3231 and then goes to the pressure knife 35. The reset member 324 ensures that the swing arm 323 always has a tendency to rotate towards the second sensor 322. When the first sensor 321 detects the swing arm 323, the unwinding assembly 33 releases the sanding belt 50. When the second sensor 322 detects the swing arm 323, the unwinding assembly 33 releases the sanding belt 50. When the arm 323 is in motion, the unwinding assembly 33 stops releasing the sanding belt 50. By setting a first sensor 321, a second sensor 322, a swing arm 323, and a reset member 324, the swing arm 323 is provided with a guide wheel 3231, and the swing arm 323 can swing back and forth between the first sensor 321 and the second sensor 322. When the winding assembly 34 winds up the sanding belt 50, the swing arm 323 gradually rotates upward. When the first sensor 321 detects the swing arm 323, the unwinding assembly 33 releases the sanding belt 50. Since the reset member 324 causes the swing arm 323 to rotate towards the second sensor 322, when the second sensor 322 detects the swing arm 323, the unwinding assembly 33 stops releasing the sanding belt 50, thereby realizing the intermittent release of the sanding belt 50 by the unwinding assembly 33, saving energy.

[0037] The reset component 324 is a tension spring. The upper end of the tension spring is connected to the swing arm 323, and the lower end of the tension spring is connected to the lifting seat 32. It can be understood that the tension spring can also be replaced by a compression spring or other structures with a reset function.

[0038] The lifting seat 32 is provided with a first guide roller group 37 and a second guide roller group 38. The pressure knife 35 is located between the first guide roller group 37 and the second guide roller group 38. The sanding belt 50 output by the unwinding assembly 33 passes through the first guide roller group 37, the pressure knife 35, and the second guide roller group 38 in sequence before reaching the winding assembly 34. By setting the first guide roller group 37 and the second guide roller group 38, the sanding belt 50 output by the unwinding assembly 33 is smoothly guided to the pressure knife 35 and then smoothly guided from the pressure knife 35 to the winding assembly 34, thereby making the operation of the vertical sanding belt grinding mechanism 30 more stable.

[0039] The first guide roller 371 and the second guide roller 381 are both provided with radially outwardly protruding arc-shaped protrusions (not shown) in the middle. By providing arc-shaped protrusions in the middle of the first guide roller 371 and the second guide roller 381, the first guide roller 371 and the second guide roller 381 are made to have a structure that is large in the middle and small at both ends, which can prevent the sanding belt 50 from running off-center on the first guide roller 371 and the second guide roller 381, thereby making the movement of the sanding belt 50 more stable.

[0040] The first guide roller group 37 is provided with a plurality of first guide rollers 371, and the second guide roller group 38 is provided with a plurality of second guide rollers 381. The first guide roller 371 is provided with a sensing wheel 3711, and the lifting seat 32 is provided with a sensor (not shown). The sensor and the sensing wheel 3711 cooperate to detect the winding amount of the sanding belt 50. The sensing wheel 3711 can also be set on the second guide roller 381. The sensing wheel 3711 and the sensor are existing technologies, and their detection principle will not be described in detail.

[0041] The pressure knife 35 is mounted on the lifting base 32 via a movable seat 39. A buffer spring (not shown) is provided between the movable seat 39 and the lifting base 32. An optical fiber sensor 39 is provided on one side of the pressure knife 35. The optical fiber sensor 39 is mounted on the lifting base 32. The optical fiber sensor 39 is used to sense the position information of the product 40 that needs to be polished, so that the rotation drive assembly 24 drives the chuck 22 to rotate, so that the chuck 22 drives the product 40 to rotate a certain angle.

[0042] The upper end of the chuck 22 is provided with a plurality of spaced elastic blocks 221. The product 40 can be fitted over the elastic blocks 221. When the clamping drive assembly 23 drives the elastic blocks 221 to disperse radially outward, the elastic blocks 221 abut against the product 40, so that the chuck 22 clamps the product 40. By providing a plurality of spaced elastic blocks 221 on the upper end of the chuck 22, in use, the product 40 is fitted over the elastic blocks 221, and the clamping drive assembly 23 drives the elastic blocks 221 to disperse radially outward, so that the chuck 22 clamps the product 40. When the elastic blocks 221 converge inward, the product 40 is released. This clamping method makes the chuck 22 not occupy the space above and around the product 40, which is beneficial for the sanding belt 50 to grind the product 40.

[0043] The upper peripheral edge of the elastic block 221 is provided with an arc-shaped positioning groove 222. All the arc-shaped positioning grooves 222 are connected to form a complete annular positioning groove. In use, the product 40 is fitted into the annular positioning groove.

[0044] The rotary drive assembly 24 has a rotating shaft 241 and a first drive member 242 for driving the rotating shaft 241 to rotate. The first drive member 242 has a rotary motor 243, a synchronous belt 244, and a synchronous pulley 245. The rotary motor 243 drives the rotating shaft 241 to rotate via the synchronous belt 244 and the synchronous pulley 245. The rotating shaft 241 is rotatably connected to the mounting base 21. The chuck 22 is located at the upper end of the rotating shaft 241 and can rotate with the rotating shaft 241. The clamping drive assembly 23 has a telescopic rod 231 and a second drive member 232 for driving the telescopic rod 231 to extend and retract. Both the rotating shaft 241 and the chuck 22 are hollow structures. 31 is telescopically inserted into the rotating shaft 241 and the clamp 22. The upper end of the telescopic rod 231 is provided with a protrusion 233. The outer side wall of the protrusion 233 pushes against the inner side wall of the elastic block 221 to make the elastic block 221 radially disperse outward. During operation, the first driving member 242 drives the rotating shaft 241 to rotate, the rotating shaft 241 drives the clamp 22 to rotate, and the clamp 22 drives the telescopic rod 231 to rotate. When the telescopic rod 231 moves downward, the protrusion 233 pushes against the elastic block 221 outward, making the elastic block 221 radially disperse outward. When the telescopic rod 231 moves upward, the protrusion 233 releases its push against the elastic block 221, making the elastic block 221 radially converge inward and return to its original position.

[0045] The inner wall of the elastic block 221 is provided with a slope 223. The slope 223 extends from top to bottom in a direction close to the central axis of the clamp 22. The protrusion 233 abuts against the slope 223. It can be understood that the slope 223 can also be provided on the circumferential outer surface of the protrusion 233.

[0046] The upper end of the telescopic rod 231 is threaded with a bolt 234, the central axis of the bolt 234 is coaxial with the central axis of the telescopic rod 231, and the protrusion 233 is the bolt head 234 located on the upper end of the bolt 234. By setting the bolt 234 on the upper end of the telescopic rod 231 and the protrusion 233 being the bolt head 234 located on the upper end of the bolt 234, and using a threaded connection, the connection between the protrusion 233 and the telescopic rod 231 is simple and easy to assemble and disassemble. At the same time, rotating the bolt 234 can adjust the position of the protrusion 233 along the axis of the telescopic rod 231, thereby better driving the chuck 22 to open and close.

[0047] The second driving member 232 has a pushing driving unit 236 and a thrust spring 237. The driving end of the second driving member 232 abuts against the lower end of the telescopic rod 231. The thrust spring 237 is sleeved on the telescopic rod 231. The lower end of the thrust spring 237 abuts against the stop block 235 on the telescopic rod 231. The upper end of the thrust spring 237 abuts against the rotating shaft 241. The thrust spring 237 makes the telescopic rod 231 always have a downward tendency. The pushing driving unit 236 is a cylinder, or it can be a screw + motor drive structure.

[0048] The rotation center line of the chuck 22 is inclined. The mounting base 21 is provided with a connecting hole 11. The frame 10 is provided with an arc-shaped hole 211 corresponding to the connecting hole 11. Screws pass through the arc-shaped hole 211 and the connecting hole 11 in sequence, so that the mounting base 21 can be rotated and adjusted to be mounted on the frame 10, and the tilt angle of the chuck 22 can be adjusted. The rotation center line of the mounting base 21 extends horizontally. By setting a rotatable and adjustable mounting base 21, the tilt angle of the chuck 22 can be adjusted, thereby adjusting the grinding position of the upper surface of the product 40 to adapt to the pressure knife 35 and improve the grinding effect.

[0049] It should be noted that the driving end of the second driving member 232 of this utility model can be directly connected to the telescopic rod 231. When the rotating shaft 241 drives the telescopic rod 231 to rotate, the second driving member 232 rotates with the telescopic rod 231.

[0050] It should also be noted that the product 40 of this utility model can be a bezel / case made of metal, or it can be other products 40.

[0051] The working principle of this utility model is as follows: The unwinding assembly 33 releases the sanding belt 50, which passes through the guide rollers 3231, the first guide roller group 37, the pressure knife 35, and the second guide roller group 38 in sequence before reaching the winding assembly 34. Driven by the horizontal drive module 36 and the lifting drive module 31, the pressure knife 35 presses the lower surface of the sanding belt 50 against the upper surface of the product 40. The winding assembly 34 continues to wind the belt, causing the sanding belt 50 to polish the upper surface of the product 40. At the same time, the rotary drive assembly 24 drives the chuck 22 to rotate, which causes the product 40 to rotate at a certain angle, so that the sanding belt 50 polishes a certain area of ​​the product 40. After a certain area of ​​the product 40 is polished, the chuck 22 continues to rotate, so that the sanding belt 50 polishes the next area.

[0052] In summary, this utility model provides a clamping and rotating mechanism 20 and a vertical belt sanding mechanism 30 on a frame 10. The clamping and rotating mechanism 20 has a mounting base 21, and a chuck 22, a clamping drive assembly 23, and a rotating drive assembly 24 mounted on the mounting base 21. The vertical belt sanding mechanism 30 has a lifting drive module 31, a lifting seat 32, and an unwinding assembly 33, a rewinding assembly 34, and a pressure knife 35 mounted on the lifting seat 32. During production, the product 40 is first clamped using the chuck 22, and then the product is lifted... The lowering drive module 31 drives the lifting seat 32 to move downwards, so that the pressure knife 35 presses the lower surface of the sanding belt 50 against the upper surface of the product 40. The sanding belt 50 output by the unwinding assembly 33 passes through the pressure knife 35 and reaches the winding assembly 34. At the same time, the rotation drive assembly 24 drives the chuck 22 to rotate, so that the sanding belt 50 polishes the upper surface of the product 40 during the movement. Thus, the upper surface of the product 40 is polished to form sanding texture in an automated manner, which has high production efficiency, reduces production costs, and has a better polishing effect.

[0053] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Therefore, any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the actual technical aspects of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A vertical belt sander, characterized in that, Includes a frame, and a clamping and rotating mechanism and a vertical belt sanding mechanism mounted on the frame; The clamping and rotating mechanism has a mounting base, and a chuck, a clamping drive assembly, and a rotating drive assembly disposed on the mounting base. The clamping drive assembly can drive the chuck to open and close so that the chuck clamps or releases the product. The rotating drive assembly can drive the chuck to rotate so that the chuck drives the product to rotate. The vertical belt sanding mechanism has a lifting drive module, a lifting base, and an unwinding assembly, a winding assembly, and a pressure knife mounted on the lifting base. The sanding belt output by the unwinding assembly passes through the pressure knife and reaches the winding assembly. The lifting drive module drives the lifting base to move up and down relative to the chuck so that the pressure knife presses the lower surface of the sanding belt against the upper surface of the product.

2. The vertical belt sander according to claim 1, characterized in that, The lifting base is equipped with a first sensor, a second sensor, a swing arm, and a reset component. The first sensor is located above the second sensor. The swing arm is rotatably connected to the lifting base and can swing back and forth between the first and second sensors. The swing arm is equipped with a guide wheel. The sanding belt output by the unwinding assembly passes through the guide wheel and then to the pressure knife. The reset component ensures that the swing arm always tends to rotate towards the second sensor. When the first sensor detects the swing arm, the unwinding assembly releases the sanding belt. When the second sensor detects the swing arm, the unwinding assembly stops releasing the sanding belt.

3. The vertical belt sander according to claim 1, characterized in that, The lifting seat is equipped with a first guide roller group and a second guide roller group. The sand belt output by the unwinding assembly passes through the first guide roller group, the pressure knife, and the second guide roller group in sequence before reaching the winding assembly.

4. The vertical belt sander according to claim 3, characterized in that, The first guide roller group is provided with multiple first guide rollers, and the second guide roller group is provided with multiple second guide rollers. The middle part of the first guide roller and the second guide roller is provided with an arc-shaped protrusion that bulges outward radially.

5. The vertical belt sander according to claim 1, characterized in that, The upper end of the chuck is provided with a plurality of elastic blocks spaced apart. The product can be fitted over the elastic blocks. When the clamping drive assembly drives the elastic blocks to disperse radially outward, the elastic blocks abut against the product, so that the chuck clamps the product.

6. The vertical belt sander according to claim 5, characterized in that, The rotary drive assembly has a rotating shaft and a first drive member that drives the rotating shaft to rotate. The rotating shaft is rotatably connected to the mounting base. The chuck is located at the upper end of the rotating shaft and can rotate with the rotating shaft. The clamping drive assembly has a telescopic rod and a second drive member that drives the telescopic rod to extend and retract. Both the rotating shaft and the chuck are hollow structures. The telescopic rod can extend and retract and move through the rotating shaft and the chuck. The upper end of the telescopic rod is provided with a protrusion. The protrusion pushes the elastic block outward so that the elastic block is radially dispersed outward.

7. The vertical belt sander according to claim 6, characterized in that, The inner wall of the elastic block is provided with an inclined surface, which extends from top to bottom in a direction close to the central axis of the clamp, and the protrusion abuts against the inclined surface.

8. The vertical belt sander according to claim 6, characterized in that, The second driving member has a push driving unit and a thrust spring. The driving end of the second driving member abuts against the lower end of the telescopic rod. The thrust spring is sleeved on the telescopic rod. The lower end of the thrust spring abuts against the stop block on the telescopic rod. The upper end of the thrust spring abuts against the rotating shaft. The thrust spring causes the telescopic rod to always have a downward tendency.

9. The vertical belt sander according to claim 1, characterized in that, The rotation center line of the chuck is set at an angle.

10. The vertical belt sander according to any one of claims 1-9, characterized in that, The mounting base is provided with a connecting hole, and the frame is provided with an arc-shaped hole corresponding to the connecting hole. The screw passes through the arc-shaped hole and the connecting hole in sequence to allow the mounting base to rotate and be installed on the frame, and to adjust the tilt angle of the chuck.

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