Grinding machine and method for replacing grinding tool

Abstract

The application provides a grinding machine and a grinding machine grinding wheel replacement method, which comprises a mounting frame, a driving motor fixed on the mounting frame, and a driving wheel fixed on the output end of the driving motor; an adjusting assembly fixed on the mounting frame, a first fixing assembly fixed on the moving end of the adjusting assembly, and at least two self-rotating guide wheels installed on the first fixing assembly; a second fixing assembly installed on the mounting frame and provided with an angle-adjustable adjusting wheel; a sand belt wrapped around the driving wheel, the guide wheels and the adjusting wheel and forming a closed loop structure; and a positioning assembly arranged at one of the guide wheels and used for judging whether the replaced sand belt is in the central position on the surface of the guide wheel. The positioning assembly is used for positioning whether the replaced sand belt is in the central position of the guide wheel, so that the difficulty of replacing the grinding wheel of the sand belt grinding machine is reduced.

Description

Technical Field

[0001] This invention relates to the field of machining technology, specifically to a grinding machine and a method for easily changing grinding tools. Background Technology

[0002] Belt grinders, commonly used for surface polishing and finishing, rely on the coordinated operation of the abrasive belt with the drive wheel, guide wheel, and adjusting wheel. In daily use, the abrasive belt needs to be replaced periodically based on wear and processing requirements. However, existing belt grinder designs typically lack a dedicated structure to assist in positioning the abrasive belt to ensure it is centered on the guide wheel.

[0003] After replacing the abrasive belt, operators often need to rely on experience to make manual judgments or repeatedly jog the drive system to indirectly confirm whether the belt is centered by observing its running status. This method is not only cumbersome and inefficient, but also susceptible to human error, easily leading to belt misalignment. This can cause problems such as belt slippage, uneven stress on the belt, and affect grinding quality and equipment stability. Therefore, there is an urgent need to optimize the structure of belt grinding machines and provide a structural design that can assist in the positioning of the abrasive belt during installation. This would improve the accuracy and efficiency of the belt replacement process, ensuring the belt is centered and the equipment operates stably.

[0004] Therefore, this paper provides a grinding machine and a method for easily changing grinding wheels to address the above problems. Summary of the Invention

[0005] This invention addresses the problem of positioning difficulties in existing grinding machines when changing abrasive belts by providing a grinding machine that facilitates abrasive tool replacement and a method for abrasive tool replacement.

[0006] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0007] This invention provides a grinding machine that facilitates the replacement of grinding tools, including a mounting frame, a drive motor fixed on the mounting frame, and a drive wheel fixed on the output end of the drive motor;

[0008] An adjustment component is fixed on the mounting bracket, and a first fixing component is fixed on the moving end of the adjustment component. At least two self-rotating guide wheels are installed on the first fixing component.

[0009] The second fixing component is mounted on the mounting bracket and is equipped with an angle-adjustable adjustment wheel;

[0010] The sanding belt is fitted onto the drive wheel, guide wheel, and adjusting wheel, forming a closed loop structure.

[0011] A positioning component is located at one of the guide wheels and is used to determine whether the replaced sanding belt is centered on the surface of the guide wheel.

[0012] The positioning component determines whether the replaced sanding belt is centered on the guide wheel, thus reducing the difficulty of changing abrasives and sanding belts on a belt grinder.

[0013] In this technical solution, the positioning component includes a projection part and a developing part. The projection part includes a light-emitting unit, which is located at the bottom of the corresponding guide wheel, and a calibration unit is provided between the corresponding guide wheel and the light-emitting unit.

[0014] The light-emitting unit projects the calibration unit and the guide wheel onto the developing unit through light illumination, and the developing unit is located above the corresponding guide wheel;

[0015] The developing section displays the projection of the calibration unit and the projection of the two calibration sides of the guide wheel itself. The two calibration sides are the two sides of the guide wheel that are parallel to the length direction of the sanding belt.

[0016] The light-emitting unit is fixed on the mounting bracket and connected to an external power supply. The light-emitting unit can emit light in soft colors.

[0017] The calibration edge of the guide wheel is its two outer circular end faces.

[0018] In this technical solution, the calibration unit includes two symmetrically arranged calibration main rods. The calibration main rods are arranged in the horizontal direction, and the two calibration main rods are respectively located on the two calibration sides of the corresponding guide wheel, and there is a clearance fit between them and the guide calibration sides.

[0019] The calibration main rod is fixed to the non-rotating part of the guide wheel by a connecting rod or fixed to the first bearing plate of the first fixed assembly.

[0020] Since the calibration main rod and the corresponding guide wheel side are in clearance fit, that is, the clearance between the two tends to be zero, the projection length of the guide wheel side on the developing section is extended by the length of the calibration main rod itself, which facilitates the comparison with the projection of the two sides in the sanding belt length direction on the developing section, and compares whether they are in a horizontal state.

[0021] Preferably, calibration support rods are fixed on both sides of the calibration main rod at equal intervals, and the calibration support rods are distributed along the axial direction of the guide wheel.

[0022] In this technical solution, the developing unit includes a semi-transparent developing plate, which is located on top of the corresponding guide wheel and sanding belt. The developing plate and the sanding belt at the guide wheel are arranged to be parallel to each other. The developing plate is rotatably connected to the first fixed component through a connecting unit, and the center line of the developing plate coincides with the center line of the corresponding guide wheel.

[0023] The developing plate is made of frosted glass or translucent acrylic sheet.

[0024] In this technical solution, the connecting unit includes an outer ring, which is fixed on the surface of the developing plate near the first fixing component. The outer ring is sleeved on the inner circular shaft, and the outer ring can rotate stably on the surface of the inner circular shaft. The inner circular shaft is arranged along the axial direction of the guide wheel and is fixed on the first fixing component by a mounting rod.

[0025] Preferably, two symmetrically arranged comparison rods slide on the top surface of the developing plate. The comparison rods are distributed radially along the guide wheel, and the two comparison rods are respectively connected to the outer wall of the developing plate through telescopic rods. The telescopic rods extend and retract along the axial direction of the guide wheel.

[0026] The telescopic rod is composed of a first link and a second link that slide and sleeve each other, with the extension rod at the end of the first link fixedly connected to the straight rod, and the extension end of the second link connected to the side wall of the developing plate.

[0027] The two comparison rods are connected to each other through a drive unit, which drives the two comparison rods to move synchronously towards each other or away from each other.

[0028] After the sanding belt position is adjusted, move the two comparison rods to see if the two comparison rods can coincide with the projections of the two sides along the length of the sanding belt at the same time.

[0029] In this technical solution, the driving unit includes a driving gear, which is mounted on the top side wall of the developing plate and can rotate on the developing plate. Two transmission racks are meshed on the driving gear, and the two transmission racks are arranged in a centrally symmetrical manner with the driving gear as the center, with a symmetry angle of 180°.

[0030] The transmission racks are distributed along the axial direction of the guide wheel, and the two transmission racks are fixedly connected to the two comparison rods respectively through the transmission rod.

[0031] The center of the circular surface on one side of the drive gear is connected to the developing plate, and a vertical rod is fixed at the center of the circular surface on the other side. A handwheel is fixed on the vertical rod. The drive gear is rotated by turning the handwheel, or one of the transmission racks is directly pushed to move, thereby driving the entire drive unit to run.

[0032] The mounting bracket includes a base plate and a vertical plate, with the vertical plate fixed to the surface of the base plate.

[0033] Specifically, the drive motor, adjustment assembly, and second fixing assembly are installed on the same side of the vertical plate, while the drive wheel, guide wheel, and adjustment wheel are located on the other side of the vertical plate.

[0034] In this technical solution, the adjustment component includes a guide rail arranged in the horizontal direction, the guide rail is fixed on the vertical plate, and a movable arm is slidably connected inside the guide rail.

[0035] A fixing screw is threaded into the side wall of the guide rail. One end of the fixing screw is connected to the moving arm, and the other end is fixed with a lever.

[0036] In this technical solution, a first fixing component is fixed to the end of the mobile arm. The first fixing component includes a first bearing plate, which is fixed to the end of the mobile arm. Multiple guide wheels are installed on the first bearing plate, and preferably there are two guide wheels, which are the first guide wheel and the second guide wheel.

[0037] Specifically, the positioning component is located at the first guide wheel.

[0038] An overlap plate is fixed on the first bearing plate, and the overlap plate is located at the bottom of the sanding belt.

[0039] The second fixing component includes a vertical plate, which is fixed on the vertical plate, and a second bearing plate is fixed on the surface of the vertical plate. The second bearing plate is connected to an adjusting wheel through an angle adjusting part.

[0040] The angle adjustment unit includes two symmetrically arranged ear plates, both of which are fixed to the second bearing plate. A horizontal shaft is fixed between the two ear plates, and a connecting plate is rotatably connected to the surface of the horizontal shaft. A self-rotating adjustment wheel is installed at the center of the surface of the connecting plate.

[0041] Two positioning screws are threaded onto the second bearing plate, penetrating through the second bearing plate, and the two positioning screws are located on both sides of the horizontal axis.

[0042] After the initial installation of the sanding belt is completed, the sanding belt is positioned with the assistance of the positioning component to ensure that the sanding belt is in the center position. Then, the drive motor is started, and the drive motor drives the drive wheel to rotate, thereby driving the sanding belt to run. Then, the two positioning screws are rotated in both directions simultaneously to adjust the angle of the connecting plate, thereby fine-tuning the angle of the adjusting wheel so that the running sanding belt is in the center position of the guide wheel, thus achieving a dynamic balance effect for the running sanding belt.

[0043] A method for changing a grinding wheel, the steps of which are as follows:

[0044] S1. Release tension: Operate the adjustment component to release the tension of the original sanding belt;

[0045] S2. Removing and replacing the sanding belt: Remove the old sanding belt while it is in a loose state, and wrap the new sanding belt around the drive wheel, guide wheel and adjusting wheel in sequence, while keeping the new sanding belt roughly in the center position.

[0046] S3. Restore tensioning structure: Reset the adjustment components to complete the initial installation and tensioning of the sanding belt;

[0047] S4. Auxiliary positioning calibration: The positioning components are set to help confirm whether the sanding belt is in the center position of the guide wheel, and to make necessary fine adjustments to the sanding belt.

[0048] S5. Dynamic Operation Adjustment: Start the drive motor to drive the drive wheel to rotate, thereby driving the sanding belt to run. At the same time, adjust the two forward and reverse positioning screws to adjust the angle of the connecting plate, thereby achieving fine adjustment of the adjustment wheel angle, so that the sanding belt in operation always stays in the center position of the guide wheel, achieving centering and balance in dynamic operation.

[0049] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0050] The positive and progressive effects of this invention are as follows:

[0051] By setting up a positioning component, the centered position of the replaced abrasive belt on the guide wheel can be accurately determined, providing a reliable reference for belt installation. This structure eliminates the need for operators to rely on experience or multiple inching operations to determine centering when changing abrasive belts. They can quickly complete the centering calibration simply by observing the relative position of the positioning component to the edge of the abrasive belt. This method not only simplifies the replacement process and reduces adjustment difficulty, but also effectively avoids problems such as belt misalignment, slippage, or unstable grinding quality caused by belt installation deviation. Therefore, it significantly improves the ease of operation, debugging efficiency, and system stability of belt grinding machines during belt replacement. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0053] Figure 2 For the present invention Figure 1 A magnified schematic diagram of the structure at point I;

[0054] Figure 3 For the present invention Figure 1 A structural diagram from another perspective;

[0055] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at point J;

[0056] Figure 5 For the present invention Figure 1 A front view structural diagram;

[0057] Figure 6 For the present invention Figure 5 A schematic diagram of the opposite surface structure;

[0058] Figure 7 For the present invention Figure 1A schematic diagram of the opposite surface structure;

[0059] Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure at point K;

[0060] Figure 9 For the present invention Figure 7 A magnified schematic diagram of the structure at point L;

[0061] Figure 10 For the present invention Figure 3 A schematic diagram of the structure viewed from below;

[0062] Figure 11 For the present invention Figure 10 A magnified schematic diagram of the structure at point M;

[0063] Figure 12 This is a schematic diagram of the structure of the driving unit of the present invention.

[0064] Explanation of reference numerals in the attached figures

[0065] 1. Mounting bracket; 11. Base plate; 12. Vertical plate;

[0066] 2. Drive motor;

[0067] 3. Drive wheels;

[0068] 4. Adjustment assembly; 41. Moving arm; 42. Guide rail; 43. Fixing screw;

[0069] 5. First fixing component; 51. First bearing plate; 52. Overlap plate; 53. First guide wheel; 54. Second guide wheel;

[0070] 6. Second fixing component; 61. Vertical plate; 62. Second bearing plate; 63. Angle adjustment part; 631. Ear plate; 632. Connecting plate; 633. Positioning screw; 64. Adjusting wheel;

[0071] 7. Projection section; 71. Light-emitting unit; 72. Calibration unit; 721. Calibration main rod; 722. Calibration support rod;

[0072] 8. Developing unit; 81. Developing plate; 82. Comparison unit; 821. First connecting rod; 822. Second connecting rod; 823. Comparison rod; 83. Drive unit; 831. Drive gear; 832. Transmission rack; 833. Transmission rod; 84. Connecting unit; 841. Outer ring; 842. Inner round shaft; 843. Mounting rod;

[0073] 9. Sand belt. Detailed Implementation

[0074] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments.

[0075] like Figure 1 As shown, a grinding machine that facilitates the replacement of grinding tools includes a mounting frame 1, a drive motor 2 fixed on the mounting frame 1, and a drive wheel 3 fixed on the output end of the drive motor 2;

[0076] An adjustment component 4 is fixed on the mounting bracket 1. A first fixing component 5 is fixed on the moving end of the adjustment component 4. At least two self-rotating guide wheels are installed on the first fixing component 5.

[0077] The second fixing component 6 is mounted on the mounting bracket 1 and is equipped with an angle-adjustable adjustment wheel 64.

[0078] Sanding belt 9 is fitted onto drive wheel 3, guide wheel and adjusting wheel 64, forming a closed loop structure;

[0079] A positioning component is provided at one of the guide wheels and is used to determine whether the replaced sanding belt 9 is centered on the surface of the guide wheel.

[0080] Example 1

[0081] like Figure 4 and Figure 7 As shown, the positioning component includes a projection unit 7 and a developing unit 8. The projection unit 7 includes a light-emitting unit 71, which is located at the bottom of the corresponding guide wheel. A calibration unit 72 is provided between the corresponding guide wheel and the light-emitting unit 71.

[0082] The light-emitting unit projects the calibration unit 72 and the guide wheel onto the developing unit 8 through light illumination, and the developing unit 8 is located above the corresponding guide wheel;

[0083] The developing section 8 displays the projection of the calibration unit 72 and the projection of the two calibration sides of the guide wheel itself. The two calibration sides are the two sides of the guide wheel that are parallel to the length direction of the sanding belt 9.

[0084] The light-emitting unit 71 is fixed on the mounting bracket 1 and connected to an external power supply. The light-emitting unit 71 can emit light of soft light colors.

[0085] The calibration edge of the guide wheel is its two outer circular end faces.

[0086] Specifically, the calibration unit 72 includes two symmetrically arranged calibration main rods 721. The calibration main rods 721 are arranged in the horizontal direction, and the two calibration main rods 721 are respectively located on the two calibration sides of the corresponding guide wheel, and are clearance-fitted with the guide calibration sides.

[0087] like Figure 4As shown, the calibration main rod 721 is fixed to the non-rotating part of the guide wheel or fixed to the first bearing plate 51 of the first fixing assembly 5 via a connecting rod.

[0088] The guide wheel includes a wheel body, which is sleeved on the mounting crossbar and can rotate on the mounting crossbar. The mounting crossbar is fixed on the first bearing plate 51, that is, the calibration main rod 721 is fixed to the non-rotating end of the mounting crossbar through a connecting rod.

[0089] Because the calibration rod 721 and the side of the corresponding guide wheel are in a clearance fit, meaning the clearance between them is close to zero, it ensures that the calibration rod 721 maintains a stable and accurate relative position to the side of the guide wheel after installation. By setting a specific length for the calibration rod 721, the projection of its end onto the developing section 8 can be appropriately extended, thereby effectively increasing the projection length of the side of the guide wheel onto the developing section 8.

[0090] This projection extension effect allows operators to more clearly observe and compare the relative positional relationship between the projection edge and the projections of the two sides of the abrasive belt 9 along its length onto the developing section 8, thereby determining whether the abrasive belt 9 is in an ideal horizontal state. Compared to traditional methods that rely on visual inspection or single-point measurement, the intuitive projection comparison mechanism formed by this structure has higher accuracy and operability, facilitating rapid belt adjustment and easy mold replacement.

[0091] As a preferred embodiment, calibration support rods 722 are fixed on both sides of the calibration main rod 721 at equal intervals, and the calibration support rods 722 are distributed along the axial direction of the guide wheel.

[0092] Multiple calibration support rods 722, perpendicular to the calibration main rod 721, are fixed on both sides, making the projection of the calibration main rod 721 on the developing section 8 clearer and easier to identify. By setting multiple calibration support rods 722, not only is the recognizability of the projected lines enhanced, but multi-point comparison is also facilitated during actual observation, thereby improving the accuracy and intuitiveness of the judgment. Specifically, the projection of the calibration support rod 722 closest to the sanding belt 9 on the developing section 8 intersects with the projection of the side of the sanding belt 9 along its length. By observing the visible length of the calibration support rod 722 on the developing section 8, it can be determined whether the distance between the calibration main rod 721 and the side of the sanding belt 9 along its length is consistent.

[0093] Furthermore, if two calibration rods 721 are respectively set on both sides of the sanding belt 9 along its length, the projected lengths of the calibration rods 722 near the sanding belt 9 on the developing section 8 can be compared to determine whether the distance between the two sides is the same. This helps to determine whether the two calibration rods 721 are parallel to the edge of the sanding belt 9, and further confirms whether the sanding belt 9 is in an ideal centered position on the guide wheel. Compared with the traditional method that relies on measuring tools or human experience, this structure has the advantages of intuitive operation, high recognition accuracy, and strong visibility, effectively improving the accuracy and efficiency of the sanding belt 9 installation and adjustment process.

[0094] like Figure 7 As shown, the developing section 8 includes a semi-transparent developing plate 81, which is located on top of the corresponding guide wheel and sanding belt 9. The developing plate 81 and the sanding belt 9 at the guide wheel are arranged to be parallel to each other. The developing plate 81 is rotatably connected to the first fixing component 5 through the connecting unit 84, and the center line of the developing plate 81 coincides with the center line of the corresponding guide wheel.

[0095] The developing plate 81 is made of a plate-shaped frosted glass or a translucent acrylic plate. When the developing plate 81 is a plate-shaped frosted glass, one side is rough and the other side is smooth. With the smooth side facing down, light enters from the smooth side and diffuses on the rough side. The rough surface diffuses the light locally, making the boundary changes clearer and the outline sharper. At the same time, when the rough surface faces the observer, the light and shadow edges present a soft but clear light-dark contrast, which also makes the observation more comfortable.

[0096] like Figure 9 As shown, the connecting unit 84 includes an outer ring 841, which is fixed on the surface of the developing plate 81 near the first fixing component 5. The outer ring 841 is sleeved on the inner circular shaft 842, and the outer ring 841 can rotate stably on the surface of the inner circular shaft 842. The inner circular shaft 842 is arranged along the axial direction of the guide wheel and is fixed on the first fixing component 5 by a mounting rod 843.

[0097] Preferably, two symmetrically arranged comparison rods 823 slide on the top surface of the developing plate 81. The comparison rods 823 are distributed radially along the guide wheel, that is, distributed perpendicular to the axial direction of the guide wheel. The two comparison rods 823 are respectively connected to the outer wall of the developing plate 81 through telescopic rods. The telescopic rods are distributed along the axial direction of the guide wheel and extend and retract along the axial direction of the guide wheel.

[0098] The telescopic rod is formed by slidingly connecting the first link 821 and the second link 822. The extension rod at the end of the first link 821 is fixedly connected to the straight rod 823, and the extension end of the second link 822 is connected to the side wall of the developing plate 81.

[0099] Preferably, the two comparison rods 823 are interconnected by a drive unit 83, which drives the two comparison rods 823 to move synchronously toward each other or toward each other.

[0100] After the sanding belt 9 is positioned, move the two comparison rods 823 to see if the two comparison rods 823 can simultaneously coincide with the projections of the two sides of the sanding belt 9 along its length.

[0101] Meanwhile, during operation, it can be determined whether the sand belt 9 is off-center by comparing whether the projections of the straight rod 823 and the two sides of the sand belt 9 are in the same position.

[0102] Slots can be made along the length of the straight rod to allow for further observation and comparison of whether the projections of the two sides of the straight rod 823 and the sand belt 9 coincide or the size of the angle between them.

[0103] Specifically, the drive unit 83 includes a drive gear 831, which is mounted on the top side wall of the developing plate 81 and can rotate on the developing plate 81. Two transmission racks 832 are meshed on the drive gear 831. The two transmission racks 832 are centrally symmetrical about the drive gear 831, with a symmetry angle of 180°.

[0104] The transmission racks 832 are distributed along the axial direction of the guide wheel, and the two transmission racks 832 are fixedly connected to the two comparison rods 823 respectively through the transmission rod 833.

[0105] The center of the circular surface on one side of the drive gear 831 is connected to the developing plate 81, and a vertical rod is fixed at the center of the circular surface on the other side. A handwheel is fixed on the vertical rod. By rotating the drive gear 831 through the handwheel, or by directly pushing one of the transmission racks 832 to move, the overall drive unit 83 is driven to run.

[0106] Specifically, the drive gear 831 is rotated by the handwheel, and the rotating drive gear 831 drives the two transmission racks 832 meshing with it to move in opposite directions or in opposite directions, thereby driving the two comparison rods 823 to move in opposite directions or in opposite directions synchronously, so as to realize the synchronous adjustment of the position of the two comparison rods 823.

[0107] Example 2

[0108] like Figure 1 As shown, the mounting bracket 1 includes a base plate 11 and a vertical plate 12, with the vertical plate 12 fixed to the surface of the base plate 11.

[0109] Specifically, the drive motor 2, the adjustment component 4, and the second fixing component 6 are installed on the same side of the vertical plate 12, while the drive wheel 3, the guide wheel, and the adjustment wheel are located on the other side of the vertical plate 12.

[0110] The adjustment component 4 includes a guide rail 42 arranged in the horizontal direction. The guide rail 42 is fixed on the vertical plate 12, and a movable arm 41 is slidably connected inside the guide rail 42.

[0111] like Figure 7 As shown, a fixing screw 43 is threaded into the side wall of the guide rail 42. One end of the fixing screw 43 is connected to the moving arm 41, and the other end is fixed with a lever.

[0112] When replacing the sanding belt 9, rotate the fixing screw 43 by turning the lever to disengage the fixing screw 43 from the moving arm 41, move the moving arm 41 inward so that the old sanding belt 9 is no longer in a tensioned state, then remove the old sanding belt 9, wrap the new sanding belt 9 around the guide wheel and adjusting wheel of the drive wheel 3, and keep it roughly in the center position. Then reset the moving arm 41, rotate the fixing screw 43 to fix the moving arm 41, and the initial replacement of the sanding belt 9 is completed.

[0113] A first fixing component 5 is fixed to the end of the movable arm 41. The first fixing component 5 includes a first bearing plate 51, which is fixed to the end of the movable arm 41. A plurality of guide wheels are installed on the first bearing plate 51, and preferably there are two guide wheels, namely the first guide wheel 53 and the second guide wheel 54.

[0114] Specifically, the positioning component is located at the first guide wheel 53.

[0115] An overlapping plate 52 is fixed on the first bearing plate 51, and the overlapping plate 52 is located at the bottom of the sanding belt 9.

[0116] The second fixing component 6 includes a vertical plate 61, which is fixed on the vertical plate 12. A second bearing plate 62 is fixed on the surface of the vertical plate 61. The second bearing plate 62 is connected to the adjusting wheel 64 through the angle adjusting part 63.

[0117] like Figure 8 As shown, the angle adjustment part 63 includes two symmetrically arranged ear plates 631. Both ear plates 631 are fixed on the second bearing plate 62. A horizontal shaft is fixed between the two ear plates 631. A connecting plate 632 is rotatably connected to the surface of the horizontal shaft. A self-rotating adjustment wheel 64 is installed at the center of the surface of the connecting plate 632.

[0118] Two positioning screws 633 are threaded into the second bearing plate 62. The positioning screws 633 penetrate the second bearing plate 62, and the two positioning screws 633 are located on both sides of the horizontal axis.

[0119] When replacing the sanding belt 9, rotate the fixing screw 43 by turning the lever to disengage the fixing screw 43 from the moving arm 41 and move the moving arm 41 inward so that the old sanding belt 9 is no longer in a tensioned state, thereby releasing the tension of the original sanding belt 9. Then remove the old sanding belt 9, wrap the new sanding belt 9 around the guide wheel and adjusting wheel of the drive wheel 3, and keep it roughly in the center position. Then reset the moving arm 41, rotate the fixing screw 43 to fix the moving arm 41, and restore the tensioning structure, thus completing the initial replacement of the sanding belt 9.

[0120] After the initial installation of the sanding belt 9 is completed, the sanding belt 9 is positioned with the assistance of the positioning component to make the sanding belt 9 centered. Then, the drive motor 2 is started, and the drive motor 2 drives the drive wheel 3 to rotate, thereby driving the sanding belt 9 to run. Then, the two positioning screws 633 are rotated forward and backward in sync to adjust the angle of the connecting plate 632, thereby fine-tuning the angle of the adjusting wheel 64, so that the running sanding belt 9 is in the center position of the guide wheel, thereby making the running sanding belt 9 achieve the effect of dynamic balance.

[0121] A method for changing a grinding wheel, the steps of which are as follows:

[0122] S1. Release tension: Operate the adjustment component 4, rotate the fixed screw 43 by the lever to disengage the fixed screw 43 from the moving arm 41, move the moving arm 41 inward, and release the tension of the original sanding belt 9.

[0123] S2. Removing and replacing sanding belt 9: Remove the old sanding belt 9 while it is in a loose state, and wrap the new sanding belt 9 around the drive wheel 3, guide wheel and adjusting wheel 64 in sequence, while keeping the new sanding belt 9 roughly in the center position.

[0124] S3. Restore tensioning structure: Reset adjustment component 4 to reset moving arm 41, rotate fixing screw 43 to fix moving arm 41. This completes the initial installation and tensioning operation of sanding belt 9.

[0125] S4. Auxiliary positioning calibration: The positioning components are set to help confirm whether the sanding belt 9 is in the center position of the guide wheel, and to make necessary fine adjustments to the sanding belt 9.

[0126] S5. Dynamic operation adjustment: Start the drive motor 2 to drive the drive wheel 3 to rotate, thereby driving the sanding belt 9 to run. At the same time, adjust the two positive and negative positioning screws 633 to adjust the angle of the connecting plate 632, thereby achieving fine adjustment of the angle of the adjustment wheel, so that the sanding belt 9 in operation always stays in the center position of the guide wheel, achieving centering and balance in dynamic operation.

[0127] This invention is not limited to the embodiments described above. Any changes in shape or structure shall fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications shall fall within the protection scope of this invention.

Claims

1. A grinding machine facilitating replacement of grinding tools, comprising a mounting frame (1) on which a driving motor (2) is fixed, and a driving wheel (3) is fixed on the output end of the driving motor (2); An adjusting assembly (4) is fixed on the mounting frame (1), a first fixing assembly (5) is fixed on the moving end of the adjusting assembly (4), and at least two self-rotating guide wheels are installed on the first fixing assembly (5), characterized in that: A second fixing assembly (6) is installed on the mounting frame (1), and an angle-adjustable adjusting wheel (64) is installed on the second fixing assembly (6); A sand belt (9) is sleeved on the driving wheel (3), the guide wheels and the adjusting wheel (64); A positioning assembly is arranged at one of the guide wheels, and is used to determine whether the replaced sand belt (9) is in the central position on the surface of the guide wheel; The positioning assembly comprises a projection part (7) and a developing part (8), the projection part (7) comprises a light-emitting unit (71), the light-emitting unit (71) is located at the bottom of the corresponding guide wheel, and a calibration unit (72) is arranged between the corresponding guide wheel and the light-emitting unit (71); The light-emitting unit (71) projects the calibration unit (72) and the guide wheel onto the developing part (8) through illumination, and the developing part (8) is located above the corresponding guide wheel; The developing part (8) shows the projection of the calibration unit (72) and the projection of two calibration edges of the guide wheel itself, and the two calibration edges are two side edges parallel to the length direction of the sand belt (9); The calibration unit (72) comprises two symmetrically arranged calibration main rods (721), the calibration main rods (721) are arranged in the horizontal direction, and the two calibration main rods (721) are respectively located on the two calibration edges of the corresponding guide wheel; The adjusting assembly (4) comprises a guide rail (42) arranged in the horizontal direction, the guide rail (42) is fixed on the vertical plate (12), and a moving arm (41) is slidably connected in the guide rail (42); A fixed screw rod (43) is threadedly inserted into the side wall of the guide rail (42), one end of the fixed screw rod (43) is lapped with the moving arm (41), and the other end is fixed with a lever; The second fixing assembly (6) comprises a vertical plate (61), the vertical plate (61) is fixed on the vertical plate (12), and a second bearing plate (62) is fixed on the surface of the vertical plate (61), the second bearing plate (62) is connected with the adjusting wheel (64) through an angle adjusting part (63); The angle adjusting part (63) comprises two symmetrically arranged ear plates (631), the two ear plates (631) are fixed on the second bearing plate (62), a horizontal shaft is fixed between the two ear plates (631), the horizontal shaft surface is rotatably connected with a connecting plate (632), and the self-rotating adjusting wheel (64) is installed on the surface center of the connecting plate (632); Two positioning screws (633) are threadedly inserted into the second bearing plate (62), the positioning screws (633) penetrate through the second bearing plate (62), and the two positioning screws (633) are respectively located on the two sides of the horizontal shaft.

2. The grinder for facilitating replacement of the grinding stone as claimed in claim 1, wherein: The calibration main rod (721) is fixed with calibration branch rods (722) of equal interval on both sides, which are distributed along the axial direction of the guide wheel.

3. The grinder for facilitating replacement of the grinding stone as claimed in claim 1, wherein: The developing part (8) comprises a translucent developing plate (81) located on the top of the guide wheel and the abrasive belt (9), which is rotationally connected to the first fixing assembly (5) through a connecting unit (84).

4. The grinder for facilitating replacement of the abrasive tool as defined in claim 3, wherein: The connecting unit (84) comprises an external connecting ring (841) fixed on one side of the surface of the developing plate (81) close to the first fixing assembly (5), which is sleeved on an internal connecting circular shaft (842) and can rotate on the surface of the internal connecting circular shaft (842), and the internal connecting circular shaft (842) is fixed on the first fixing assembly (5) through a mounting rod (843).

5. The grinder for facilitating replacement of the abrasive tool as claimed in claim 4, wherein: The top surface of the developing plate (81) is slidably provided with two symmetrically arranged comparison straight rods (823) distributed along the radial direction of the guide wheel, and the two comparison straight rods (823) are respectively connected to the outer wall of the developing plate (81) through telescopic rods which are telescopic along the axial direction of the guide wheel.

6. The grinder for facilitating replacement of the abrasive tool as claimed in claim 5, wherein: The two comparison straight rods (823) are connected to each other through a driving unit (83) which drives the two comparison straight rods (823) to move synchronously towards each other or away from each other.

7. The grinder for facilitating replacement of the abrasive tool as claimed in claim 6, wherein: The driving unit (83) comprises a driving gear (831) mounted on the top side wall of the developing plate (81) and rotatable on the developing plate (81), and two transmission racks (832) are engaged and connected on the driving gear (831) and symmetrically arranged with the driving gear (831) as the center. The transmission racks (832) are distributed along the axial direction of the guide wheel, and the two transmission racks (832) are fixedly connected to the two comparison straight rods (823) through a transmission rod (833).

8. The grinding tool replacement method of the grinding machine facilitating replacement of the grinding tool according to any one of claims 1 to 7, characterized in that: The specific steps of the method are as follows: S1, releasing the tensioning state: operating the adjusting assembly (4), rotating the fixing screw (43) through the lever, so that the fixing screw (43) is separated from the moving arm (41), and the moving arm (41) is moved inward to release the tensioning state of the original abrasive belt (9); S2, disassembling and replacing the abrasive belt (9): taking off the old abrasive belt (9) under the relaxed state of the abrasive belt (9), and winding the new abrasive belt (9) on the driving wheel (3), the guide wheel and the adjusting wheel (64) in turn, while keeping the new abrasive belt (9) roughly in the center position; S3, restoring the tensioning structure: resetting the adjusting assembly (4) to reset the moving arm (41), rotating the fixing screw (43) to fix the moving arm (41), thereby completing the preliminary installation and tensioning operation of the abrasive belt (9); S4, auxiliary positioning and calibration: using the positioning assembly to assist in confirming whether the abrasive belt (9) is in the center position of the guide wheel, and making necessary fine adjustment to the abrasive belt (9); S5, dynamic operation adjustment: start the driving motor (2), drive the driving wheel (3) to rotate, thereby driving the sand belt (9) to run, while synchronously adjusting the two forward and reverse positioning screws (633) to adjust the angle of the connecting plate (632), thereby realizing the fine adjustment of the angle of the adjusting wheel, so that the sand belt (9) in operation always remains in the center position of the guide wheel, realizing the centering and balance in the dynamic operation state.

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