Abrasive belt sander

Abstract

The utility model provides a kind of abrasive belt polishing device, it is related to workpiece polishing technical field, including installation platform, driving wheel, abrasive belt positioning frame, first elastic member and connecting structure;Driving wheel is installed in installation platform;Abrasive belt positioning frame is located in the side of driving wheel radial, and it is intervally set between abrasive belt positioning frame and installation platform, and at least two driven wheels are intervally set on abrasive belt positioning frame;Driving wheel and driven wheel are used to around abrasive belt;One end of first elastic member is connected with installation platform, and other end is connected with abrasive belt positioning frame, and first elastic member is used to exert the thrust of far from driving wheel to abrasive belt positioning frame;Connecting structure is used to connect the installation platform and abrasive belt positioning frame of first elastic member after being compressed, and each other close;The utility model can guarantee that abrasive belt is in tension state, avoid abrasive belt slackening, and save the replacement time of abrasive belt, improve work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of workpiece grinding technology, and in particular to a belt grinding device. Background Technology

[0002] A belt grinder is a commonly used grinding device in machining. It uses a fast-moving belt to grind the surface of a workpiece. Because of its variety of types and shapes, it can deeply grind metal welds, surfaces and the inside of pipes. It can also be used to remove burrs and other residual burrs from the surface of non-metallic workpieces.

[0003] During use, sanding belts gradually loosen due to stretching, wear, and heat, affecting the sanding effect. Operators need to repeatedly tension the sanding belt. Furthermore, sanding belts need to be replaced after a certain degree of wear, and the sanding belt replacement process on traditional belt sanders is quite cumbersome. Utility Model Content

[0004] The purpose of this invention is to provide a belt sanding device to solve the problems existing in the prior art. It can ensure that the sanding belt is in a taut state, prevent the sanding belt from loosening, save sanding belt replacement time, and improve work efficiency.

[0005] To achieve the above objectives, this utility model provides the following solution: A belt sanding device includes a mounting platform, a drive wheel, a belt positioning frame, a first elastic element, and a connecting structure. The drive wheel is mounted on the mounting platform. The belt positioning frame is located on one side radially upwards from the drive wheel, and is spaced apart from the mounting platform. At least two driven wheels are spaced apart on the belt positioning frame. The drive wheel and the driven wheels are used to wind a sanding belt. One end of the first elastic element is connected to the mounting platform, and the other end is connected to the belt positioning frame. The first elastic element is used to apply a thrust away from the drive wheel to the belt positioning frame. The connecting structure is used to connect the mounting platform and the belt positioning frame, which are compressed and close to each other, after the first elastic element is compressed.

[0006] As one embodiment, there are two driven wheels, which are symmetrically distributed on both sides of the radial centerline of the driving wheel, and the distance between the far ends of the two driven wheels is greater than the diameter of the driving wheel.

[0007] In one embodiment, a slot is provided at one end of the sanding belt positioning frame near the mounting platform. The connecting structure includes a second elastic member and a buckle. The middle part of the buckle is hinged to the mounting platform, and the axial direction of the hinge axis is perpendicular to the extension and retraction direction of the first elastic member. The buckle extends along the extension and retraction direction of the first elastic member. One end of the buckle is connected to the second elastic member, and the other end is provided with a hook for engaging the slot. The second elastic member is used to apply a force to the buckle to make the hook fasten the slot.

[0008] As one embodiment, it further includes a mounting post, one end of which is connected to the end of the first elastic member, and the other end of which is coaxially connected to a post head, the diameter of which is smaller than that of the mounting post; the mounting platform is provided with a first mounting hole facing the sanding belt positioning frame, and the sanding belt positioning frame is provided with a second mounting hole directly opposite the first mounting hole; the first elastic member and the end of the mounting post are both disposed in the first mounting hole; the post head is disposed in the second mounting hole, and the end of the mounting post abuts against the sanding belt positioning frame.

[0009] In one embodiment, the mounting platform includes a main body and a mounting block. The mounting block is detachably connected to the main body and is located between the drive wheel and the sanding belt positioning frame. The second elastic element, the buckle, and the first mounting hole are all provided on the mounting block.

[0010] As one embodiment, the main body is provided with a mounting groove, and the drive wheel and the mounting block are both disposed in the mounting groove.

[0011] As one embodiment, it also includes a drive mechanism, a main drive wheel, and a secondary drive wheel. The main drive wheel and the secondary drive wheel are both mounted on the mounting platform. The main drive wheel, the secondary drive wheel, the driving wheel, and the driven wheel are distributed on both sides of the mounting platform. The main drive wheel is connected to the drive mechanism and the secondary drive wheel in a transmission connection. The secondary drive wheel is coaxially arranged with the driving wheel. The diameter of the main drive wheel is larger than that of the secondary drive wheel.

[0012] In one embodiment, the driving mechanism includes a drive motor, the output end of which is provided with a power wheel, the power wheel being connected to a transmission wheel, and the main drive wheel being coaxially arranged with the transmission wheel.

[0013] In one embodiment, the main drive wheel, the auxiliary drive wheel, the power wheel, and the transmission wheel are all connected by toothed belt drive.

[0014] As one embodiment, the mounting platform is also provided with a tensioning wheel for adjusting the tension of the toothed belt between the main drive wheel and the auxiliary drive wheel.

[0015] This utility model has the following technical advantages over the prior art: This invention, by setting a first elastic element, can apply a thrust away from the drive wheel to the sanding belt positioning frame, ensuring that the sanding belt is taut. Even if the sanding belt gradually loosens during use, the sanding belt positioning frame will gradually move away from the drive wheel under the thrust of the first elastic element, thus ensuring that the sanding belt is always taut. This allows for better grinding of the workpiece and reduces the number of times and time that workers need to manually adjust the sanding belt, thereby improving grinding efficiency and saving labor intensity and investment costs.

[0016] This invention, by setting up a connecting structure and cooperating with a first elastic element, enables the replacement of sanding belts without disassembling the installation platform or sanding belt positioning frame, greatly improving the convenience of sanding belt replacement, significantly shortening sanding belt replacement time, and improving work efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the belt sanding device in one embodiment of the present invention; Figure 2 This is a left view of the belt sanding device in one embodiment of the present invention; Figure 3 This is an isometric view of the belt abrasive grinding device in one embodiment of the present invention; Figure 4 This is a schematic diagram of the cooperation structure between the mounting block and the sanding belt positioning frame in one embodiment of the present invention; Figure 5 This is a schematic diagram of the mating structure between the mounting block and the mounting column in one embodiment of the present invention; Figure 6 This is a schematic diagram of the cooperation structure between the first elastic element and the mounting post in one embodiment of the present invention; Figure 7 This is a right view of the belt sanding device in one embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Mounting platform; 101. Main body; 102. Mounting block; 2. Drive wheel; 3. Sanding belt; 4. Sanding belt positioning frame; 5. Driven wheel; 6. First elastic element; 7. Second elastic element; 8. Buckle; 9. Mounting column; 10. Column head; 11. Drive motor; 12. Main drive wheel; 13. Secondary drive wheel; 14. Power wheel; 15. Transmission wheel; 16. Tensioning wheel; 17. Wheel frame. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] The purpose of this invention is to provide a belt sanding device to solve the problems existing in the prior art. It can ensure that the sanding belt is in a taut state, prevent the sanding belt from loosening, save sanding belt replacement time, and improve work efficiency.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1-7 As shown, this embodiment provides a sanding device for a sanding belt 3, including a mounting platform 1, a drive wheel 2, a sanding belt positioning frame 4, a first elastic element 6, and a connecting structure. The mounting platform 1 is fixedly mounted, and the drive wheel 2 is rotatably mounted on the mounting platform 1. The sanding belt positioning frame 4 is located on one side radially upwards from the drive wheel 2, and is spaced apart from the mounting platform 1. At least two driven wheels 5 are spaced apart on the sanding belt positioning frame 4. The drive wheel 2 and driven wheels 5 are used to wind the sanding belt 3. The sanding belt 3 between two adjacent driven wheels 5 is used to sand the workpiece, such as removing burrs and flash, and is particularly suitable for sanding workpieces with curved surfaces. One end of the first elastic element 6 is connected to the mounting platform 1, and the other end is connected to the sanding belt positioning frame 4. The first elastic element 6 is used to apply a thrust away from the drive wheel 2 to the sanding belt positioning frame 4. The connecting structure connects the mounting platform 1 and the sanding belt positioning frame 4 after the first elastic element 6 is compressed and brought closer together.

[0024] In this embodiment, by setting the first elastic element 6, a thrust can be applied to the sanding belt positioning frame 4 away from the drive wheel 2, which can ensure that the sanding belt 3 is taut. Even if the sanding belt 3 gradually loosens during use, the sanding belt positioning frame 4 will gradually move away from the drive wheel 2 under the thrust of the first elastic element 6, thereby ensuring that the sanding belt 3 is always in a taut state. This allows for better grinding of the workpiece and reduces the number of times and time that workers need to manually adjust the state of the sanding belt 3, which is beneficial to improving grinding efficiency and saving labor intensity and input costs.

[0025] When the sanding belt 3 wears down to the point where the sanding effect is no longer satisfactory, it needs to be replaced. When replacing the sanding belt 3, the sanding belt positioning frame 4 is pushed toward the mounting platform 1 (which is also equivalent to pushing toward the drive wheel 2), causing the first elastic element 6 to compress and the sanding belt 3 to gradually loosen. After the sanding belt positioning frame 4 moves to a certain position, the mounting platform 1 and the sanding belt positioning frame 4 are connected by the connecting structure, so that the position of the sanding belt positioning frame 4 remains unchanged and the sanding belt 3 is completely loosened. Then, the severely worn sanding belt 3 is removed from the drive wheel 2 and the driven wheel 5. After the new sanding belt 3 is wound around the drive wheel 2 and the driven wheel 5, the connecting structure is released. Under the restoring force of the first elastic element 6, the sanding belt positioning frame 4 gradually moves away from the mounting platform 1, and the sanding belt 3 becomes taut, allowing the sanding action to continue.

[0026] Therefore, by setting up a connection structure and cooperating with the first elastic element 6, this embodiment can complete the replacement of the sanding belt 3 without disassembling the installation platform 1 or the sanding belt positioning frame 4, which greatly improves the convenience of replacing the sanding belt 3, can significantly shorten the replacement time of the sanding belt 3, and improve work efficiency.

[0027] In this embodiment, there are two driven wheels 5, which are symmetrically distributed on both sides of the radial centerline of the driving wheel 2. The distance between the far ends of the two driven wheels 5 is greater than the diameter of the driving wheel 2, so that the sanding belt 3 is roughly in the shape of an isosceles triangle, with the driving wheel 2 located at the apex of the isosceles triangle and the two driven wheels 5 located at the two bases of the isosceles triangle.

[0028] like Figures 2-5As shown, in this embodiment, a slot is provided at one end of the sanding belt positioning frame 4 near the mounting platform 1. The connecting structure includes a second elastic member 7 and a buckle 8. The middle part of the buckle 8 is hinged to the mounting platform 1, and the axial direction of the hinge axis is perpendicular to the extension and retraction direction of the first elastic member 6. The buckle 8 extends along the extension and retraction direction of the first elastic member 6. One end of the buckle 8 is connected to the second elastic member 7, and the other end is provided with a hook 801 for engaging the slot. The second elastic member 7 is used to apply a force to the buckle 8 to make the hook 801 fasten the slot. During the grinding process, the mounting platform 1 and the sanding belt positioning frame 4 are spaced apart. The second elastic element 7 lifts up the end of the buckle 8, and the hook 801 is located between the mounting platform 1 and the sanding belt positioning frame 4. When the sanding belt 3 needs to be replaced, the sanding belt positioning frame 4 is brought close to the mounting platform 1, and the end of the buckle 8 connected to the second elastic element 7 is pressed down, compressing the second elastic element 7. The end where the hook 801 is located is raised. When the sanding belt positioning frame 4 is close to the mounting platform 1, the end where the second elastic element 7 is located is released. Under the restoring force of the second elastic element 7, the end where the buckle 8 is located drops, and the hook 801 is locked in the slot, hooking the sanding belt positioning frame 4. Meanwhile, the first elastic element 6 always exerts a pushing force on the sanding belt positioning frame 4 away from the mounting platform 1. Together with the buckle 8, the sanding belt positioning frame 4 can be fixed and prevented from falling off.

[0029] In this embodiment, both the first elastic element 6 and the second elastic element 7 are compression springs.

[0030] like Figure 5 , Figure 6 As shown, this embodiment also includes a mounting post 9. One end of the mounting post 9 is connected to the end of the first elastic member 6, and the other end of the mounting post 9 is coaxially connected to a post head 10. The diameter of the post head 10 is smaller than that of the mounting post 9. The mounting platform 1 is provided with a first mounting hole facing the sanding belt positioning frame 4, and the sanding belt positioning frame 4 is provided with a second mounting hole directly opposite the first mounting hole. The first elastic member 6 and a part of the mounting post 9 are both disposed in the first mounting hole. The post head 10 is disposed in the second mounting hole, and the end of the mounting post 9 abuts against the sanding belt positioning frame 4. When the sanding belt positioning frame 4 is pushed, the mounting post 9 moves into the first mounting hole. Through the cooperation between the mounting post 9 and the first mounting hole, and the cooperation between the post head 10 and the second mounting hole, the position of the sanding belt positioning frame 4 can be positioned and guided during the movement, avoiding the problem of the sanding belt positioning frame 4 shaking.

[0031] In this embodiment, the mounting platform 1 includes a main body 101 and a mounting block 102. The mounting block 102 is detachably connected to the main body 101. The mounting block 102 is located between the drive wheel 2 and the sanding belt positioning frame 4. The second elastic element 7, the buckle 8 and the first mounting hole are all provided on the mounting block 102.

[0032] In this embodiment, the main body 101 is provided with a mounting groove, and the drive wheel 2 and the mounting block 102 are both set in the mounting groove to improve the compactness of the overall device.

[0033] like Figure 1 As shown, this embodiment also includes a drive mechanism, a main drive wheel 12, and a secondary drive wheel 13. The drive mechanism is used to mount the main drive wheel 12 and the secondary drive wheel 13 on the mounting platform 1. The main drive wheel 12, the secondary drive wheel 13, the driving wheel 2, and the driven wheel 5 are distributed on both sides of the mounting platform 1. The main drive wheel 12 is connected to the drive mechanism and the secondary drive wheel 13. The secondary drive wheel 13 is coaxially arranged with the driving wheel 2. The diameter of the main drive wheel 12 is larger than that of the secondary drive wheel 13, which is used to increase the rotational speed of the secondary drive wheel 13, that is, to increase the rotational speed of the driving wheel 2 and the driven wheel 5, so as to improve the grinding effect.

[0034] like Figure 1 , Figure 7 As shown, in this embodiment, the drive mechanism includes a drive motor 11, and a power wheel 14 is provided at the output end of the drive motor 11. The power wheel 14 is connected to the transmission wheel 15. The main drive wheel 12 and the transmission wheel 15 are coaxially arranged. In this embodiment, the main drive wheel 12, the auxiliary drive wheel 13, the power wheel 14, and the transmission wheel 15 are all provided with teeth. The main drive wheel 12 and the auxiliary drive wheel 13, as well as the power wheel 14 and the transmission wheel 15, are connected by toothed belts. Through the cooperation of the teeth and the toothed belt, the stability of power transmission between each transmission pair can be improved, avoiding the slippage problem caused by using ordinary transmission belts.

[0035] like Figure 1 , Figure 7 As shown, in this embodiment, the mounting platform 1 is also equipped with a tensioning wheel 16 for adjusting the tension of the toothed belt between the main drive wheel 12 and the auxiliary drive wheel 13. Specifically, the tensioning wheel 16 is mounted on a wheel frame 17. One end of the wheel frame 17 is connected to the mounting platform 1 by a bolt, and the other end of the wheel frame 17 is provided with an arc-shaped hole. Another bolt passes through the arc-shaped hole and is connected to the mounting platform 1. The wheel frame 17 is pressed tightly by a nut, so that the wheel frame 17 can rotate around one end, thereby changing the contact force between the tensioning wheel 16 and the toothed belt.

[0036] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0037] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A belt abrasive grinding device, characterized in that, include: Installation platform; A drive wheel, which is mounted on the mounting platform; A sanding belt positioning frame is located on one side radially upwards from the drive wheel. The sanding belt positioning frame is spaced apart from the mounting platform. At least two driven wheels are spaced apart on the sanding belt positioning frame. The drive wheel and the driven wheels are used to wind the sanding belt. A first elastic element, one end of which is connected to the mounting platform and the other end of which is connected to the sanding belt positioning frame, is used to apply a thrust away from the drive wheel to the sanding belt positioning frame; And a connecting structure, the connecting structure being used to connect the mounting platform and the sanding belt positioning frame, which are close to each other after the first elastic element is compressed.

2. The belt sanding device according to claim 1, characterized in that, There are two driven wheels, which are symmetrically distributed on both sides of the radial centerline of the driving wheel. The distance between the far ends of the two driven wheels is greater than the diameter of the driving wheel.

3. The belt sanding device according to claim 1, characterized in that, The sanding belt positioning frame has a slot at one end near the mounting platform. The connecting structure includes a second elastic element and a buckle. The middle part of the buckle is hinged to the mounting platform, and the axial direction of the hinge axis is perpendicular to the extension and retraction direction of the first elastic element. The buckle extends along the extension and retraction direction of the first elastic element. One end of the buckle is connected to the second elastic element, and the other end is provided with a hook for engaging the slot. The second elastic element applies a force to the buckle to make the hook fasten the slot.

4. The belt sanding device according to claim 3, characterized in that, It also includes a mounting post, one end of which is connected to the end of the first elastic member, and the other end of which is coaxially connected to a post head, the diameter of which is smaller than that of the mounting post; the mounting platform is provided with a first mounting hole facing the sanding belt positioning frame, and the sanding belt positioning frame is provided with a second mounting hole directly opposite the first mounting hole; the first elastic member and the end of the mounting post are both disposed in the first mounting hole; the post head is disposed in the second mounting hole, and the end of the mounting post abuts against the sanding belt positioning frame.

5. The belt sanding device according to claim 4, characterized in that, The installation platform includes a main body and an installation block. The installation block is detachably connected to the main body and is located between the drive wheel and the sanding belt positioning frame. The second elastic element, the buckle, and the first mounting hole are all provided on the installation block.

6. The belt sanding device according to claim 5, characterized in that, The main body is provided with a mounting groove, and the drive wheel and the mounting block are both disposed in the mounting groove.

7. The belt abrasive grinding device according to any one of claims 1 to 6, characterized in that, It also includes a drive mechanism, a main drive wheel, and a secondary drive wheel. The main drive wheel and the secondary drive wheel are both mounted on the mounting platform. The main drive wheel, the secondary drive wheel, the driving wheel, and the driven wheel are distributed on both sides of the mounting platform. The main drive wheel is connected to the drive mechanism and the secondary drive wheel. The secondary drive wheel is coaxially arranged with the driving wheel. The diameter of the main drive wheel is larger than that of the secondary drive wheel.

8. The belt sanding device according to claim 7, characterized in that, The drive mechanism includes a drive motor, the output end of which is provided with a power wheel, which is connected to a transmission wheel, and the main drive wheel is coaxial with the transmission wheel.

9. The belt sanding device according to claim 8, characterized in that, The main drive wheel, the auxiliary drive wheel, the power wheel, and the transmission wheel are all connected by toothed belt drive.

10. The belt sanding device according to claim 9, characterized in that, The mounting platform is also equipped with a tensioning wheel for adjusting the tension of the toothed belt between the main drive wheel and the auxiliary drive wheel.

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