Abrasive belt tensioning device of belt sander

Abstract

The utility model discloses an abrasive belt tensioning device of a belt sander, which belongs to the technical field of belt sanders and comprises a mounting seat, a movable sliding chute is arranged on the bottom surface of the mounting seat, a groove is arranged at the top of an inner cavity of the movable sliding chute, and two sides of the inner cavity of the movable sliding chute are respectively connected with a movable seat in a sliding manner. According to the abrasive belt tensioning device, the first rotating wheel, the second rotating wheel and the third rotating wheel are used for supporting the abrasive belt, the air cylinder is used for driving the ejector block to move downwards to enable the two movable seats to be far away from each other, and therefore the tensioning degree of the abrasive belt is adjusted through the second rotating wheel and the third rotating wheel, and the tensioning force of the abrasive belt is detected in real time through the tension sensor; when the tension sensor detects that the tension of the abrasive belt is reduced, the controller is used for controlling the air cylinder to drive the ejector block to continuously move downwards, then the tension degree of the abrasive belt is adjusted to the needed degree again, and the function of automatically adjusting the tension degree of the abrasive belt is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of abrasive belt machines, and more specifically to a abrasive belt tensioning device of abrasive belt machines. Background Art

[0002] The belt sander is a very commonly used polishing equipment and has been widely used in hardware, plumbing and other industries. After the belt sander is used for a long time, the belt will wear and loosen, and the belt of the belt sander needs to be tightened.

[0003] After searching, the utility model patent with announcement number CN217317430U discloses a belt tensioning device for a sanding machine, including a mounting base, a first rotating wheel is arranged on the front of the mounting base, a tensioning assembly is arranged on the bottom of the mounting base, a cylinder is arranged on the upper side of the mounting base, a groove is opened in the middle of the interior of the mounting base, and a sliding top block is arranged inside the groove. The patent can push the sliding top block up and down through the arranged cylinder, and the arranged moving seat can slide left and right at the bottom of the mounting base through the slide groove and the slider, so that after the sliding top block is pushed between the two moving seats, the two moving seats will move outward, and at this time the distance between the first rotating wheel and the second rotating wheel will become larger, so that the sanding belts on the first rotating wheel and the second rotating wheel can be tensioned.

[0004] However, the above patents still have the following shortcomings: it is not convenient to measure and control the tension of the sanding belt, so it is not convenient to use the gas rod to drive the top block to automatically adjust the tension of the sanding belt, and the convenience is not good; in addition, the stability of the reset of the moving seat driven by the spring is poor, and the spring will fail after long-term use. For this reason, we propose a sanding belt tensioning device for a sanding belt machine. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model aims to provide a sanding belt tensioning device for a sanding belt machine.

[0006] In order to solve the above problems, the utility model adopts the following technical solutions:

[0007] The top of the movable frame is provided with a movable frame, and the movable frame is slidably connected with the movable frame at two sides of the movable frame, and a reset mechanism is provided between the two movable seats. The front side of the mounting base is rotatably connected with the second rotating wheel, the front side of one of the movable seats is rotatably connected with the first rotating wheel, and the front side of the other movable seat is provided with an L-shaped groove, the inner wall of the L-shaped groove is fixedly connected with a tension sensor, the end of the tension sensor is fixedly connected with a pulling block, the end of the pulling block is fixedly connected with a supporting seat, the supporting seat is rotatably connected with the third rotating wheel, the back side of the mounting base is provided with a controller, the top surface of the mounting base is fixedly installed with a cylinder, the output end of the cylinder extends to the inner cavity of the groove and is fixedly connected with a top block, the two sides of the bottom end of the top block are respectively provided with sliding surfaces, and the end surfaces of the two movable seats are provided with upper sliding surfaces, and the upper sliding surface and the sliding surface are in contact with each other.

[0008] As a preferred solution of the utility model, the reset mechanism includes an installation groove opened on the inner side of the two movable seats, the inner walls of the two installation grooves are provided with multiple screw holes, the inner cavities of the two installation grooves are provided with installation plates, a pneumatic rod is fixedly connected between the two installation plates, a spring is fixedly connected between the two installation plates, and screws are sleeved on the two installation plates, and the ends of the screws are threadedly installed in the inner cavity of the screw holes.

[0009] As a preferred solution of the utility model, a driving motor is fixedly mounted on the back of the movable seat, and the output shaft of the driving motor is connected to one end of the rotating shaft of the first rotating wheel.

[0010] As a preferred solution of the utility model, the side surface of the movable seat is in contact with the inner wall of the movable slide groove.

[0011] As a preferred solution of the utility model, the top surface and the bottom surface of the support seat are respectively fitted with the top surface and the bottom surface of the inner cavity of the L-shaped groove.

[0012] As a preferred solution of the utility model, the inner wall of the groove and the side surface of the top block are in contact with each other.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] (1) In the utility model, the first rotating wheel, the second rotating wheel and the third rotating wheel are used to support the sanding belt, and the cylinder is used to drive the top block to move downward so that the two movable seats are separated from each other, so that the tension of the sanding belt is adjusted by the second rotating wheel and the third rotating wheel, and the tension of the sanding belt is detected in real time by the tension sensor. When the tension sensor detects that the tension of the sanding belt is reduced, the controller is used to control the cylinder to drive the top block to continue to move downward, and the tension of the sanding belt is adjusted to the required degree again, thereby realizing the function of automatically adjusting the tension of the sanding belt.

[0015] (2) In the utility model, after the top block moves back to the inner cavity of the groove, the restoring elastic force of the spring and the pneumatic rod is used to drive the two movable seats to reset. At this time, the sanding belts on the first rotating wheel, the second rotating wheel and the third rotating wheel are in a completely relaxed state, so that the sanding belts can be replaced. At the same time, the cooperation of the spring and the pneumatic rod can effectively avoid the failure of the elastic force; in addition, the spring and the pneumatic rod are installed between the two movable seats through screw holes, mounting plates and screws. When the elastic force of the spring and the pneumatic rod fails, they can be conveniently replaced, which has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the front side of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall structure of the back side of the utility model;

[0018] Figure 3 It is a cross-sectional schematic diagram of the utility model;

[0019] Figure 4 This is a schematic diagram of the interior of the L-shaped groove of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the gas pressure rod of the utility model.

[0021] Explanation of the numbers in the figure: 1. Mounting seat; 2. Moving slide groove; 3. Groove; 4. Moving seat; 5. Reset mechanism; 6. First rotating wheel; 7. Second rotating wheel; 8. L-shaped groove; 9. Tension sensor; 10. Pull block; 11. Support seat; 12. Third rotating wheel; 13. Cylinder; 14. Top block; 15. Controller; 16. Mounting groove; 17. Screw hole; 18. Mounting plate; 19. Spring; 20. Pneumatic rod; 21. Screw; 22. Driving motor; 23. Upper sliding surface; 24. Lower sliding surface. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Example:

[0026] See also Figure 1-5 A belt tensioning device for a belt sander comprises a mounting seat 1, a movable slide groove 2 is arranged on the bottom surface of the mounting seat 1, a groove 3 is arranged on the top of the inner cavity of the movable slide groove 2, movable seats 4 are slidably connected to the inner cavity of the movable slide groove 2 on both sides, a reset mechanism 5 is arranged between the two movable seats 4, a second rotating wheel 7 is rotatably connected to the front of the mounting seat 1, a first rotating wheel 6 is rotatably connected to the front of one movable seat 4, an L-shaped groove 8 is opened on the front of the other movable seat 4, a tension sensor 9 is fixedly connected to the inner wall of the L-shaped groove 8, and a tension sensor 9 is fixedly connected to the inner wall of the L-shaped groove 8. A pulling block 10 is fixedly connected to the end of the force sensor 9, and a supporting seat 11 is fixedly connected to the end of the pulling block 10. A third rotating wheel 12 is rotatably connected to the supporting seat 11. A controller 15 is arranged on the back of the mounting seat 1. A cylinder 13 is fixedly installed on the top surface of the mounting seat 1. The output end of the cylinder 13 extends to the inner cavity of the groove 3 and is fixedly connected to a top block 14. Both sides of the bottom end of the top block 14 are respectively provided with lower sliding surfaces 24, and the end surfaces of the two movable seats 4 are provided with upper sliding surfaces 23, and the upper sliding surfaces 23 and the lower sliding surfaces 24 are in contact with each other.

[0027] In this embodiment, the outer sides of the first rotating wheel 6 , the second rotating wheel 7 and the third rotating wheel 12 are covered with abrasive belts.

[0028] For details, please refer to Figure 1 , Figure 3 and Figure 5 The reset mechanism 5 includes a mounting groove 16 opened on the inner side of the two movable seats 4, the inner walls of the two mounting grooves 16 are provided with a plurality of screw holes 17, the inner cavities of the two mounting grooves 16 are provided with mounting plates 18, a pneumatic rod 20 is fixedly connected between the two mounting plates 18, a spring 19 is fixedly connected between the two mounting plates 18, and screws 21 are sleeved on the two mounting plates 18, and the ends of the screws 21 are threadedly installed in the inner cavity of the screw holes 17.

[0029] In this embodiment, the mounting plate 18 and the moving seat 4 are mounted by the cooperation between the screw 21 and the screw hole 17, and the spring 19 and the gas pressure rod 20 between the two moving seats 4 are in a stretched state.

[0030] For details, please refer to Figure 4 A driving motor 22 is fixedly mounted on the back of a moving seat 4 , and an output shaft of the driving motor 22 is connected to one end of the rotating shaft of the first rotating wheel 6 .

[0031] In this embodiment, the driving motor 22 is used to drive the first rotating wheel 6 to rotate, and the first rotating wheel 6 is used to drive the sanding belts mounted on the first rotating wheel 6 , the second rotating wheel 7 and the third rotating wheel 12 .

[0032] For details, please refer to Figure 4 , the side surface of the movable seat 4 is in contact with the inner wall of the movable slide groove 2.

[0033] In this embodiment, the inner wall of the movable slide groove 2 is used to limit the movable seat 4 to ensure the stability of the movable seat 4 in the inner cavity of the movable slide groove 2.

[0034] For details, please refer to Figure 3 The top surface and bottom surface of the support seat 11 are respectively in contact with the top surface and bottom surface of the inner cavity of the L-shaped groove 8.

[0035] In this embodiment, the stability of the support seat 11 in the L-shaped groove 8 is ensured, thereby ensuring the supporting strength of the support seat 11 for the third rotating wheel 12 .

[0036] For details, please refer to Figure 3 , the inner wall of the groove 3 and the side surface of the top block 14 are in contact with each other.

[0037] In this embodiment, the inner wall of the groove 3 is used to limit the top block 14 to ensure the stability of the top block 14 in the groove 3.

[0038] Working principle: When in use, first put the sanding belt on the outside of the first rotating wheel 6, the second rotating wheel 7 and the third rotating wheel 12, then start the cylinder 13 to drive the top block 14 to move downward, and use the sliding surface 24 at the bottom of the top block 14 and the upper sliding surface 23 at the end of the moving seat 4 to push the two moving seats 4 away from each other, so that the first rotating wheel 6 and the third rotating wheel 12 at the front of the two moving seats 4 are away from each other, so as to adjust the tightness of the sanding belt on the first rotating wheel 6, the second rotating wheel 7 and the third rotating wheel 12. In addition, the third rotating wheel 12 is subjected to force The support seat 11 has a tendency to move. At this time, the pulling block 10 drives the tension sensor 9 to generate tension, thereby controlling the tension of the sand belt. Finally, during the use of the sand belt, the tension sensor 9 is used to detect the sand belt tension on the third rotating wheel 12 in real time. When the sand belt is loose, the tension sensor 9 detects that the tension is reduced. At this time, the controller 15 controls the cylinder 13 to drive the top block 14 to continue to move downward, thereby driving the two moving seats 4 to move away from each other again, and then adjusting the tension of the sand belt to the required degree again.

[0039] When the two movable seats 4 move away from each other, the spring 19 and the pneumatic rod 20 generate pulling force at the same time. When the top block 14 moves back to the inner cavity of the groove 3, the restoring elastic force of the spring 19 and the pneumatic rod 20 drives the two movable seats 4 to reset. At this time, the sanding belts on the first rotating wheel 6, the second rotating wheel 7 and the third rotating wheel 12 are in a completely relaxed state, so that the sanding belts can be replaced. In addition, the spring 19 and the pneumatic rod 20 are installed between the two movable seats 4 through the screw hole 17, the mounting plate 18 and the screw 21. When the elastic force of the spring 19 and the pneumatic rod 20 fails, they can be easily replaced.

[0040] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the utility model according to the technical solution and improved ideas of the utility model, which should be included in the protection scope of the utility model.

Claims

1. A belt tensioning device for a belt sanding machine, comprising a mounting seat (1), characterized in that: The bottom surface of the mounting seat (1) is provided with a movable groove (2), the top of the inner cavity of the movable groove (2) is provided with a groove (3), the two sides of the inner cavity of the movable groove (2) are slidably connected with movable seats (4), a reset mechanism (5) is provided between the two movable seats (4), the front surface of the mounting seat (1) is rotatably connected with a second rotating wheel (7), the front surface of one of the movable seats (4) is rotatably connected with a first rotating wheel (6), the front surface of the other movable seat (4) is provided with an L-shaped groove (8), the inner wall of the L-shaped groove (8) is fixedly connected with a tension sensor (9), and the end of the tension sensor (9) is fixedly connected to the inner wall of the L-shaped groove (8). A pulling block (10) is connected, the end of the pulling block (10) is fixedly connected to a support seat (11), a third rotating wheel (12) is rotatably connected to the support seat (11), a controller (15) is arranged on the back of the mounting seat (1), a cylinder (13) is fixedly installed on the top surface of the mounting seat (1), the output end of the cylinder (13) extends to the inner cavity of the groove (3) and is fixedly connected to a top block (14), lower sliding surfaces (24) are respectively arranged on both sides of the bottom end of the top block (14), and upper sliding surfaces (23) are arranged on the end surfaces of the two movable seats (4), and the upper sliding surfaces (23) and the lower sliding surfaces (24) are in contact with each other.

2. The belt tensioning device of a belt sanding machine according to claim 1, characterized in that: The reset mechanism (5) comprises a mounting groove (16) provided on the inner side of the two movable seats (4), the inner walls of the two mounting grooves (16) are provided with a plurality of screw holes (17), the inner cavities of the two mounting grooves (16) are provided with mounting plates (18), a pneumatic rod (20) is fixedly connected between the two mounting plates (18), a spring (19) is fixedly connected between the two mounting plates (18), and screws (21) are sleeved on the two mounting plates (18), and the ends of the screws (21) are threadedly installed in the inner cavities of the screw holes (17).

3. The belt tensioning device of a belt sanding machine according to claim 1, characterized in that: A driving motor (22) is fixedly mounted on the back of the movable seat (4), and the output shaft of the driving motor (22) is connected to one end of the rotating shaft of the first rotating wheel (6).

4. The belt tensioning device of a belt sanding machine according to claim 1, characterized in that: The side surface of the movable seat (4) is in contact with the inner wall of the movable slide groove (2).

5. The belt tensioning device of a belt sanding machine according to claim 1, characterized in that: The top surface and bottom surface of the support seat (11) are respectively fitted with the top surface and bottom surface of the inner cavity of the L-shaped groove (8).

6. The belt tensioning device of a belt sanding machine according to claim 1, characterized in that: The inner wall of the groove (3) is in contact with the side surface of the top block (14).

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