Automatic abrasive paper changing polishing machine with dust collection function

Abstract

The automatic abrasive paper changing polishing machine with the dust collection function comprises a main body unit and a dust collection unit, the main body unit comprises a machining table, a vertical plate is fixed to the top of the machining table, a hollow column is rotationally connected into the vertical plate, a plurality of rectangular frames are fixed and communicated with the outer side of the hollow column in the radial direction at equal intervals, and rectangular plates are slidably connected into the rectangular frames; main arc-shaped plates are fixed to the sides, away from the hollow column, of the rectangular plates, auxiliary arc-shaped plates are rotationally connected to the two sides of the main arc-shaped plates through hinges, and rubber pads are fixed to the outer sides of the multiple main arc-shaped plates and the outer sides of the auxiliary arc-shaped plates. When the rectangular plate moves, the hollow plate is driven to move along with the rectangular plate, and when the hollow plate moves, the L-shaped plate pulls a first rotating rod and drives the first rotating rod to rotate, when the first rotating rod rotates, a moving plate and a traction plate are driven to move, and when the traction plate moves, an auxiliary arc-shaped plate is driven to rotate in the direction close to the rectangular plate; and the auxiliary arc-shaped plate is prevented from blocking the movement of the main arc-shaped plate.

Description

Technical Field

[0001] The present invention relates to the technical field of polishing machines, and particularly to an automatic sandpaper-changing polishing machine with a dust suction function. Background Art

[0002] A polishing machine is a mechanical processing device that performs surface mechanical treatment on a workpiece to obtain the required surface finish. During the polishing process, the polishing machine can eliminate uneven burrs and defects on the surface of the workpiece, thereby improving the flatness and overall aesthetics of the workpiece surface. It is particularly important in the manufacture of precision instruments and ornaments. There are many types of polishing machines, and common types include drum polishing machines, surface polishing machines, disk polishing machines, etc.

[0003] Publication No. CN215788996U discloses a disk polishing machine, which includes a frame. It further includes a polishing wheel, a front and rear moving workbench, a left and right moving workbench, a lifting workbench, and a turntable for fixing the workpiece; the front and rear moving workbench is slidably engaged with the bottom of the frame in the front and rear directions, the left and right moving workbench is slidably engaged with the front and rear moving workbench in the left and right directions, the lifting workbench is arranged on the left and right moving workbench to drive the turntable to move up and down, and the turntable approaches the polishing wheel to polish the workpiece.

[0004] When in use, a polishing machine usually needs to use sandpaper to polish the workpiece. After the sandpaper is worn out after a period of use, it needs to be replaced. It is very convenient to replace the sandpaper of the existing surface polishing machine. Currently, the surface polishing machine can directly adsorb the sandpaper by controlling the suction cup with a cylinder to perform automatic replacement. When replacing the sandpaper of a disk polishing machine, there are mainly two methods. One is to adhere the annular sandpaper to the disk and gradually rotate the disk so that the sandpaper covers the disk. When laying the sandpaper, wrinkles, offsets, etc. are likely to occur, and it is also very troublesome to replace it later. The other is to put the annular sandpaper on the disk. However, the diameter of the annular sandpaper is usually only slightly larger than the diameter of the disk. When putting the annular sandpaper on the disk, it is necessary to continuously and slowly rotate and move the annular sandpaper to put it on the disk, which takes a long time and is also very troublesome to replace. Summary of the Invention

[0005] In view of this, the object of the present invention is to provide an automatic sandpaper-changing polishing machine with a dust suction function. The technical problems to be solved are as follows: when replacing the sandpaper of a disc polishing machine, there are mainly two methods. One is to adhere the annular sandpaper to the disc and gradually rotate the disc so that the sandpaper wraps around the disc. When laying the sandpaper, wrinkles, offsets and other situations are likely to occur, and it is also very troublesome to replace it later. The other is to put the annular sandpaper on the disc. However, the diameter of the annular sandpaper is usually only slightly larger than the diameter of the disc. When putting the annular sandpaper on the disc, it is necessary to continuously and slowly rotate and move the annular sandpaper to put it on the disc, which takes a long time and is also very troublesome to replace.

[0006] To achieve the above technical object, the technical solution adopted by the present invention is as follows.

[0007] The present invention provides an automatic sandpaper-changing polishing machine with a dust suction function:

[0008] It includes a main body unit and a dust suction unit. The main body unit includes a processing table. A vertical plate is fixed on the top of the processing table. A hollow column is rotatably connected inside the vertical plate. A plurality of rectangular frames are fixedly connected and communicated along the radial direction of the outer side of the hollow column at equal intervals. A rectangular plate is slidably connected inside the rectangular frame. A main arc plate is fixed on the side of the rectangular plate away from the hollow column. Both sides of the main arc plate are rotatably connected by hinges with secondary arc plates. Rubber pads are fixed on the outer sides of a plurality of the main arc plates and secondary arc plates. A plurality of the main arc plates and secondary arc plates can form a ring for supporting the annular sandpaper. A driving component for driving the main arc plate to move is arranged inside the hollow column. A control component for controlling the rotation of the secondary arc plate is arranged on the rectangular plate. When the driving component works, it can drive the control component to work synchronously. The dust suction unit includes a plurality of dust suction covers distributed on the top of the processing table. A plurality of dust suction pipes are fixed inside the processing table. A plurality of the dust suction covers are respectively installed on the corresponding dust suction pipes.

[0009] As a preferred scheme of the automatic sandpaper-changing polishing machine with a dust suction function of the present invention, among them: the bottoms of a plurality of the dust suction pipes are fixedly connected and communicated with a communicating pipe. Two brackets are fixed at the bottom of the processing table. A connecting frame is fixedly connected between the two brackets. An exhaust fan is installed on the connecting frame. A conduit is fixedly connected and communicated with the air inlet of the exhaust fan. One end of the conduit away from the exhaust fan is fixedly connected and communicated with the communicating pipe. A discharge pipe is fixedly connected and communicated with the air outlet of the exhaust fan. One end of the discharge pipe away from the exhaust fan is fixedly connected and communicated with a dust collection bag. A dust discharge pipe is fixedly connected and communicated with the dust collection bag.

[0010] As a preferred embodiment of the automatic sandpaper-changing polishing machine with a dust suction function according to the present invention, the following features are provided: On one side of the processing table, an extension plate is fixed. A travel groove is formed in the extension plate. A convex block is slidably connected in the travel groove. Both sides of the convex block are in contact with the inner walls on both sides of the travel groove. A storage cylinder is fixed to the top of the convex block. A second ear plate is fixed to the top of the extension plate. A second hydraulic cylinder is installed on the second ear plate. The extending end of the second hydraulic cylinder is fixed to the convex block. A second guiding rod is fixed in the travel groove. The second guiding rod passes through the convex block, and the convex block slides on the outside of the second guiding rod.

[0011] As a preferred embodiment of the automatic sandpaper-changing polishing machine with a dust suction function according to the present invention, the following features are provided: A processing groove is formed in the processing table. A placement plate is slidably connected in the processing groove. Two first guiding rods are fixed to the inner wall of the processing groove. The first guiding rods pass through the placement plate, and the placement plate is slidably fitted outside the first guiding rods.

[0012] As a preferred embodiment of the automatic sandpaper-changing polishing machine with a dust suction function according to the present invention, the following features are provided: Two first ear plates are fixed to the bottom of the processing table. A lead screw is rotatably connected between the two first ear plates. A first motor is installed on one side of one of the first ear plates. The output end of the first motor is fixed to one end of the lead screw. A connecting block is fixed to the bottom of the placement plate. The lead screw passes through the connecting block and is threadedly connected to the connecting block.

[0013] As a preferred embodiment of the automatic sandpaper-changing polishing machine with a dust suction function according to the present invention, the following features are provided: A driven wheel is fixed to the outside of the hollow column. A rotating shaft is rotatably connected in the vertical plate. A driving wheel is fixed to one end of the rotating shaft. The driving wheel and the driven wheel are rotationally connected by a belt. A second motor is installed on one side of the vertical plate. One end of the rotating shaft is fixed to the output end of the second motor.

[0014] As a preferred embodiment of the automatic sandpaper-changing polishing machine with a dust suction function according to the present invention, the following features are provided: A U-shaped seat is fixed to one side of the vertical plate. A first hydraulic cylinder is installed on the inner wall of the U-shaped seat. A disc is fixed to the extending end of the first hydraulic cylinder. A cylindrical rod is slidably connected in the hollow column. The cylindrical rod is rotationally connected to the disc. Limiting grooves are formed in the inner walls on both sides of the U-shaped seat. Two limiting rods are fixed to the outside of the disc. The limiting rods are slidably fitted in the corresponding limiting grooves.

[0015] As a preferred solution of the automatic sandpaper-changing polishing machine with a dust suction function according to the present invention, wherein: the control assembly includes hollow plates fixed on both sides of the rectangular plate. A moving plate is slidably connected inside the hollow plate. A pulling plate is fixed on the side of the moving plate away from the rectangular plate. A U-shaped plate is fixed on the inner wall of the secondary arc plate. The pulling plate and the U-shaped plate are rotatably connected. A groove is formed inside the hollow plate. A second hinge seat is fixed on the side of the moving plate extending into the groove. L-shaped plates are fixed on both sides of the rectangular frame. A first hinge seat is fixed on the side of the L-shaped plate located inside the groove. A first rotating rod is rotatably connected inside the first hinge seat and the second hinge seat.

[0016] As a preferred solution of the automatic sandpaper-changing polishing machine with a dust suction function according to the present invention, wherein: the driving assembly includes a third hinge seat fixed on one side of the rectangular plate. A plurality of fourth hinge seats are fixed on the outer side of the cylindrical rod at equal intervals along its radial direction. A second rotating rod is rotatably connected between the third hinge seat and the fourth hinge seat.

[0017] As a preferred solution of the automatic sandpaper-changing polishing machine with a dust suction function according to the present invention, wherein: a tool rest is fixed on one of the L-shaped plates. A blade is fixed on one side of the tool rest. Notches are formed in both one of the main arc plates and the rubber pad. The blade can penetrate through the notch.

[0018] From the above technical solutions, it can be seen that the present application has the following beneficial effects:

[0019] 1: When it is necessary to replace the annular sandpaper, the first hydraulic cylinder extends to drive the disc and the cylindrical rod to move. When the cylindrical rod moves, it drives the second rotating rod to rotate. When the second rotating rod rotates, it drives the rectangular plate to move into the rectangular frame. Since the rectangular plate moves towards the hollow column, the main arc plate no longer tightens the annular sandpaper, that is, the annular sandpaper is loosened from the main arc plate, facilitating its replacement.

[0020] 2: When the rectangular plate moves, it will drive the hollow plate to move accordingly. However, the positions of the rectangular frame and the L-shaped plate remain unchanged. When the hollow plate moves, the L-shaped plate will pull the first rotating rod and drive the first rotating rod to rotate. When the first rotating rod rotates, it will drive the moving plate and the pulling plate to move. When the pulling plate moves, it drives the secondary arc plate to rotate towards the rectangular plate, avoiding the secondary arc plate blocking the movement of the main arc plate.

[0021] 3: After the main arc plate moves a certain distance, the blade will emerge from the notch. At this time, the user only needs to pull the annular sandpaper from the direction opposite to the blade, and the annular sandpaper can be cut by the blade, thus facilitating the removal of the annular sandpaper.

[0022] 4: Place the annular sandpaper to be replaced into the storage cylinder. At this time, the second hydraulic cylinder extends to drive the convex block and the storage cylinder to move, so that the storage cylinder moves to the outside of the main arc plate and the auxiliary arc plate. Then, the first hydraulic cylinder contracts to drive the cylindrical rod to move. At this time, when the cylindrical rod moves, it drives the second rotating rod to rotate in the reverse direction. When the second rotating rod rotates, it drives the rectangular plate to move away from the hollow column, and further drives the rectangular plate and the main arc plate to move closer to the inner wall of the storage cylinder. And when the rectangular plate moves, since the L-shaped plate is fixed, it further drives the first rotating rod to rotate. When the first rotating rod rotates, it drives the moving plate and the pulling plate to move, and further drives the auxiliary arc plate to rotate away from the rectangular plate. When the limiting rod abuts against the inner wall of one side of the limiting groove, the main arc plate and the auxiliary arc plate form a ring. At this time, the rubber pads on the outside of the main arc plate and the auxiliary arc plate are attached to the inner wall of the annular sandpaper, that is, the annular sandpaper is installed on the main arc plate and the auxiliary arc plate. Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0024] Figure 1 is a structural schematic diagram of an automatic sandpaper-changing polishing machine with a dust suction function provided by the present invention;

[0025] Figure 2 is a structural schematic diagram when the main arc plate and the auxiliary arc plate of the present invention are closed;

[0026] Figure 3 is another perspective structural schematic diagram of an automatic sandpaper-changing polishing machine with a dust suction function provided by the present invention;

[0027] Figure 4 is another perspective structural schematic diagram of an automatic sandpaper-changing polishing machine with a dust suction function provided by the present invention;

[0028] Figure 5 provided by the present invention Figure 2 is another perspective schematic diagram of the structural split in;

[0029] Figure 6 provided by the present invention Figure 5 is another perspective schematic diagram of the partial structure in;

[0030] Figure 7 provided by the present invention Figure 6 is a structural schematic diagram of the A position in;

[0031] Figure 8 provided by the present inventionFigure 2 Schematic diagram of half-section of the middle structure.

[0032] Description of the drawings: 100, main body unit; 101, processing table; 102, vertical plate; 103, hollow column; 104, rectangular frame; 105, rectangular plate; 106, main arc plate; 107, secondary arc plate; 108, hinge; 109, rubber pad; 110, processing groove; 111, storage plate; 112, first guide rod; 113, first ear plate; 114, first motor; 115, connecting block; 116, lead screw; 117, driven wheel; 118, rotating shaft; 119, driving wheel; 120, belt; 121, second motor; 122, cylindrical rod; 123, hollow plate; 124, moving plate; 125, pulling plate; 126, U-shaped plate; 127, groove; 128, L-shaped plate; 129, first hinge seat; 130, second hinge seat; 131, first rotating rod; 132, tool rest; 133, blade; 134, notch; 135, third hinge seat; 136, fourth hinge seat; 137, second rotating rod; 138, U-shaped seat; 139, first hydraulic cylinder; 140, disc; 141, limit groove; 142, limit rod; 200, dust suction unit; 201, dust suction hood; 202, dust suction pipe; 203, connecting pipe; 204, exhaust fan; 205, conduit; 206, discharge pipe; 207, dust collection bag; 208, dust discharge pipe; 209, bracket; 210, connecting frame; 211, extension plate; 212, travel groove; 213, convex block; 214, storage cylinder; 215, second hydraulic cylinder; 216, second ear plate; 217, second guide rod. Detailed implementation manners

[0033] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given in conjunction with the drawings of the specification.

[0034] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0035] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present invention. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or alternative embodiments that exclude each other with other embodiments.

[0036] Next, the present invention will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be locally enlarged not in accordance with the general scale, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0037] As an embodiment of the present invention, an automatic sandpaper-changing polishing machine with a dust suction function is provided, which includes a main body unit 100 and a dust suction unit 200. The main body unit 100 includes a processing table 101. A vertical plate 102 is fixed on the top of the processing table 101. A hollow column 103 is rotatably connected inside the vertical plate 102. A plurality of rectangular frames 104 are fixedly connected and communicated along the radial direction of the outer side of the hollow column 103 at equal intervals. A rectangular plate 105 is slidably connected inside the rectangular frame 104. A main arc plate 106 is fixed on the side of the rectangular plate 105 away from the hollow column 103. Both sides of the main arc plate 106 are rotatably connected with sub-arc plates 107 through hinges 108. Rubber pads 109 are fixed on the outer sides of a plurality of main arc plates 106 and sub-arc plates 107. A plurality of main arc plates 106 and sub-arc plates 107 can form a ring for supporting the annular sandpaper. A driving component for driving the main arc plate 106 to move is arranged inside the hollow column 103. A control component for controlling the rotation of the sub-arc plate 107 is arranged on the rectangular plate 105. When the driving component works, it can drive the control component to work synchronously. The dust suction unit 200 includes a plurality of dust suction covers 201 distributed on the top of the processing table 101. A plurality of dust suction pipes 202 are fixed inside the processing table 101. A plurality of dust suction covers 201 are respectively installed on the corresponding dust suction pipes 202.

[0038] Among them, an extension plate 211 is fixed on one side of the processing table 101. A travel groove 212 is formed in the extension plate 211. A convex block 213 is slidably connected in the travel groove 212. Both sides of the convex block 213 are in contact with the inner walls on both sides of the travel groove 212. A storage cylinder 214 is fixed on the top of the convex block 213. A second ear plate 216 is fixed on the top of the extension plate 211. A second hydraulic cylinder 215 is installed on the second ear plate 216. The extending end of the second hydraulic cylinder 215 is fixed to the convex block 213. A second guide rod 217 is fixed in the travel groove 212. The second guide rod 217 passes through the convex block 213, and the convex block 213 slides on the outside of the second guide rod 217. A processing groove 110 is formed in the processing table 101. A placing plate 111 is slidably connected in the processing groove 110. Two first guide rods 112 are fixed on the inner wall of the processing groove 110. The first guide rods 112 pass through the placing plate 111, and the placing plate 111 is slidably fitted outside the first guide rods 112. Two first ear plates 113 are fixed on the bottom of the processing table 101. A lead screw 116 is rotatably connected between the two first ear plates 113. A first motor 114 is installed on one side of one of the first ear plates 113. The output end of the first motor 114 is fixed to one end of the lead screw 116. A connecting block 115 is fixed to the bottom of the placing plate 111. The lead screw 116 passes through the connecting block 115 and is threadedly connected to the connecting block 115. A driven wheel 117 is fixed on the outside of the hollow column 103. A rotating shaft 118 is rotatably connected in the vertical plate 102. A driving wheel 119 is fixed to one end of the rotating shaft 118. The driving wheel 119 and the driven wheel 117 are rotationally connected by a belt 120. A second motor 121 is installed on one side of the vertical plate 102. One end of the rotating shaft 118 is fixed to the output end of the second motor 121.

[0039] It should be noted that the annular sandpaper is sleeved outside the main arc plate 106 and the auxiliary arc plate 107. Since rubber pads 109 are fixed on the outside of the main arc plate 106 and the auxiliary arc plate 107, the friction between the main arc plate 106, the auxiliary arc plate 107 and the annular sandpaper is increased. During use, the workpiece to be polished is installed on the placing plate 111. The second motor 121 is started to drive the rotating shaft 118 to rotate. When the rotating shaft 118 rotates, it drives the driving wheel 119 to rotate. When the driving wheel 119 rotates, it drives the driven wheel 117 to rotate through the belt 120. When the driven wheel 117 rotates, it drives the hollow column 103 to rotate. When the hollow column 103 rotates, it drives the annular sandpaper outside the main arc plate 106 and the auxiliary arc plate 107 to rotate accordingly. Then the first motor 114 is started to drive the lead screw 116 to rotate. When the lead screw 116 rotates, it drives the connecting block 115 to move back and forth. When the connecting block 115 moves, it drives the placing plate 111 and the workpiece on the placing plate 111 to move back and forth accordingly, so that the annular sandpaper polishes the workpiece.

[0040] In addition, the bottoms of multiple dust suction pipes 202 are fixedly connected together with a connecting pipe 203. Two brackets 209 are fixed to the bottom of the processing table 101. A connecting frame 210 is fixedly connected between the two brackets 209. An exhaust fan 204 is installed on the connecting frame 210. A conduit 205 is fixedly connected to the air inlet of the exhaust fan 204. One end of the conduit 205 away from the exhaust fan 204 is fixedly connected and communicated with the connecting pipe 203. A discharge pipe 206 is fixedly connected to the air outlet of the exhaust fan 204. One end of the discharge pipe 206 away from the exhaust fan 204 is fixedly connected and communicated with a dust collection bag 207. A dust discharge pipe 208 is fixedly connected to the dust collection bag 207.

[0041] It should be noted that when the workpiece is being polished, the exhaust fan 204 is started, so that the dust after polishing is sucked into the dust suction hood 201, and then is conveyed through the dust suction pipes 202, the connecting pipe 203, and the discharge pipe 206 to the dust collection bag 207 for collection. In addition, a pipe cap is threadedly connected to the dust discharge pipe 208. When it is necessary to clean the dust in the dust collection bag 207, the pipe cap on the dust discharge pipe 208 is opened, and the dust in the dust collection bag 207 can be poured out.

[0042] It is worth mentioning that the second motor 121, the first hydraulic cylinder 139, the exhaust fan 204, the first motor 114, and the second hydraulic cylinder 215 in this embodiment are all conventional devices purchased on the market and well-known to those skilled in the art. The model can be selected according to actual needs or customized. In this patent, we only use them and do not improve their structures and functions. Their setting methods, installation methods, and electrical connection methods can be debugged and operated by those skilled in the art as long as they are in accordance with the requirements of their operation manuals. Therefore, they will not be elaborated here. Moreover, the second motor 121, the first hydraulic cylinder 139, the exhaust fan 204, the first motor 114, and the second hydraulic cylinder 215 are all provided with corresponding control switches, and the installation positions of the control switches are selected according to actual use requirements to facilitate operation and control by the operator.

[0043] In addition, a U-shaped seat 138 is fixed to one side of the vertical plate 102. A first hydraulic cylinder 139 is installed on the inner wall of the U-shaped seat 138. The extended end of the first hydraulic cylinder 139 is fixed with a disc 140. A cylindrical rod 122 is slidably connected in the hollow column 103. The cylindrical rod 122 is rotatably connected to the disc 140. Limiting grooves 141 are opened on both inner walls of the U-shaped seat 138. Two limiting rods 142 are fixed to the outside of the disc 140. The limiting rods 142 are slidably fitted in the corresponding limiting grooves 141.

[0044] Specifically, the control component includes hollow plates 123 fixed to both sides of the rectangular plate 105. A moving plate 124 is slidably connected inside the hollow plate 123. A pulling plate 125 is fixed to the side of the moving plate 124 away from the rectangular plate 105. A U-shaped plate 126 is fixed to the inner wall of the secondary arc-shaped plate 107. The pulling plate 125 and the U-shaped plate 126 are rotatably connected. A groove 127 is formed inside the hollow plate 123. A second hinge seat 130 is fixed to the side of the moving plate 124 extending into the groove 127. L-shaped plates 128 are fixed to both sides of the rectangular frame 104. A first hinge seat 129 is fixed to the side of the L-shaped plate 128 located inside the groove 127. A first rotating rod 131 is rotatably connected inside the first hinge seat 129 and the second hinge seat 130.

[0045] Furthermore, the driving component includes a third hinge seat 135 fixed to one side of the rectangular plate 105. A plurality of fourth hinge seats 136 are fixed to the outer side of the cylindrical rod 122 at equal intervals along its radial direction. A second rotating rod 137 is rotatably connected between the third hinge seat 135 and the fourth hinge seats 136. A tool holder 132 is fixed to one of the L-shaped plates 128. A blade 133 is fixed to one side of the tool holder 132. Notches 134 are formed in both one of the main arc-shaped plates 106 and the rubber pad 109. The blade 133 can penetrate through the notches 134.

[0046] When it is necessary to replace the annular sandpaper, the first hydraulic cylinder 139 extends to drive the disc 140 to move. When the disc 140 moves, it drives the cylindrical rod 122 to move. When the cylindrical rod 122 moves, it drives the second rotating rod 137 to rotate. When the second rotating rod 137 rotates, it drives the rectangular plate 105 to move into the rectangular frame 104. Since the rectangular plate 105 moves towards the hollow column 103, the main arc-shaped plate 106 is no longer tightened with the annular sandpaper, that is, the annular sandpaper is loosened from the main arc-shaped plate 106, which is convenient for replacing it. When the rectangular plate 105 drives the main arc-shaped plate 106 to move towards the hollow column 103, the movement of the rectangular plate 105 will drive the hollow plate 123 to move accordingly. Since the rectangular frame 104 and the L-shaped plate 128 are fixed, when the hollow plate 123 moves, the L-shaped plate 128 will pull the first rotating rod 131, thereby driving the first rotating rod 131 to rotate. When the first rotating rod 131 rotates, it will pull the moving plate 124, thereby driving the moving plate 124 to move. When the moving plate 124 moves, it drives the pulling plate 125 to move. When the pulling plate 125 moves, it drives the secondary arc-shaped plate 107 to rotate towards the rectangular plate 105. That is, when the rectangular plate 105 drives the main arc-shaped plate 106 to move, the secondary arc-shaped plate 107 will also rotate towards the rectangular plate 105 accordingly, so as to avoid the secondary arc-shaped plate 107 blocking the movement of the main arc-shaped plate 106 when the main arc-shaped plate 106 moves towards the hollow column 103;

[0047] When the main arc-shaped plate 106 moves a certain distance, the blade 133 will overflow from the notch 134. At this time, the user only needs to pull the annular sandpaper from the direction opposite to the blade 133, and the annular sandpaper can be cut off by the blade 133, so as to facilitate the removal of the annular sandpaper. Then, place the annular sandpaper to be replaced into the storage cylinder 214. At this time, the second hydraulic cylinder 215 extends to drive the convex block 213 and the storage cylinder 214 to move, so that the storage cylinder 214 moves to the outside of the main arc-shaped plate 106 and the sub-arc-shaped plate 107. Then, the first hydraulic cylinder 139 contracts to drive the cylindrical rod 122 to move away from the storage cylinder 214. At this time, when the cylindrical rod 122 moves, it drives the second rotating rod 137 to rotate in the reverse direction. When the second rotating rod 137 rotates, it drives the rectangular plate 105 to move away from the hollow column 103, and further drives the rectangular plate 105 and the main arc-shaped plate 106 to move closer to the inner wall of the storage cylinder 214. And when the rectangular plate 105 moves, since the L-shaped plate 128 is fixed, it further drives the first rotating rod 131 to rotate. When the first rotating rod 131 rotates, it drives the moving plate 124 and the pulling plate 125 to move, and further drives the sub-arc-shaped plate 107 to rotate away from the rectangular plate 105. When the limiting rod 142 abuts against the inner wall of one side of the limiting groove 141, the main arc-shaped plate 106 and the sub-arc-shaped plate 107 form a ring. At this time, the rubber pads 109 on the outside of the main arc-shaped plate 106 and the sub-arc-shaped plate 107 are in contact with the inner wall of the annular sandpaper, that is, the annular sandpaper is installed on the main arc-shaped plate 106 and the sub-arc-shaped plate 107. It should be noted that when the main arc-shaped plate 106 and the sub-arc-shaped plate 107 form a ring, the blade 133 is located inside the ring, that is, the blade 133 will not damage the annular sandpaper.

[0048] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications into equivalent embodiments by using the technical content disclosed above without departing from the technical solution of the present invention. However, as long as it does not depart from the technical content of the present invention, any brief modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An automatic sandpaper-changing polishing machine with a dust suction function, characterized in that, Comprising: A main body unit (100), including a processing table (101), a vertical plate (102) is fixed on the top of the processing table (101), a hollow column (103) is rotatably connected inside the vertical plate (102), a plurality of rectangular frames (104) are fixedly connected and communicated along the radial direction of the outer side of the hollow column (103) at equal intervals, a rectangular plate (105) is slidably connected inside the rectangular frame (104), a main arc plate (106) is fixed on the side of the rectangular plate (105) away from the hollow column (103), both sides of the main arc plate (106) are rotatably connected with auxiliary arc plates (107) through hinges (108), rubber pads (109) are fixed on the outer sides of the plurality of main arc plates (106) and auxiliary arc plates (107), the plurality of main arc plates (106) and auxiliary arc plates (107) can form a ring for supporting a circular sandpaper, a driving component for driving the main arc plate (106) to move is arranged inside the hollow column (103), a control component for controlling the rotation of the auxiliary arc plate (107) is arranged on the rectangular plate (105), and when the driving component works, it can drive the control component to work synchronously; A dust suction unit (200), including a plurality of dust suction hoods (201) distributed on the top of the processing table (101), a plurality of dust suction pipes (202) are fixed inside the processing table (101), and the plurality of dust suction hoods (201) are respectively installed on the corresponding dust suction pipes (202).

2. The automatic sandpaper-changing polishing machine with a dust suction function according to claim 1, characterized in that, The bottoms of the plurality of dust suction pipes (202) are fixedly connected and communicated together with a communicating pipe (203), two brackets (209) are fixed at the bottom of the processing table (101), a connecting frame (210) is fixedly connected between the two brackets (209), a suction fan (204) is installed on the connecting frame (210), a conduit (205) is fixedly connected and communicated with the air inlet of the suction fan (204), one end of the conduit (205) away from the suction fan (204) is fixedly connected and communicated with the communicating pipe (203), a discharge pipe (206) is fixedly connected and communicated with the air outlet of the suction fan (204), one end of the discharge pipe (206) away from the suction fan (204) is fixedly connected and communicated with a dust collection bag (207), and a dust discharge pipe (208) is fixedly connected and communicated with the dust collection bag (207).

3. The automatic sandpaper-changing polishing machine with a dust suction function according to claim 1, characterized in that, One side of the processing table (101) is fixed with an extension plate (211). A travel groove (212) is formed in the extension plate (211). A convex block (213) is slidably connected in the travel groove (212). Both sides of the convex block (213) are in contact with the inner walls on both sides of the travel groove (212). A storage cylinder (214) is fixed to the top of the convex block (213). A second ear plate (216) is fixed to the top of the extension plate (211). A second hydraulic cylinder (215) is installed on the second ear plate (216). The extending end of the second hydraulic cylinder (215) is fixed to the convex block (213). A second guide rod (217) is fixed in the travel groove (212). The second guide rod (217) passes through the convex block (213), and the convex block (213) slides on the outside of the second guide rod (217).

4. The automatic sandpaper-changing polishing machine with a dust suction function according to claim 1, characterized in that, A processing groove (110) is formed in the processing table (101). A placement plate (111) is slidably connected in the processing groove (110). Two first guide rods (112) are fixed to the inner wall of the processing groove (110). The first guide rods (112) pass through the placement plate (111), and the placement plate (111) is slidably fitted outside the first guide rods (112).

5. An automatic sandpaper-changing polishing machine with a dust suction function according to claim 4, characterized in that, Two first ear plates (113) are fixed to the bottom of the processing table (101). A lead screw (116) is rotatably connected between the two first ear plates (113). A first motor (114) is installed on one side of one of the first ear plates (113). The output end of the first motor (114) is fixed to one end of the lead screw (116). A connecting block (115) is fixed to the bottom of the placement plate (111). The lead screw (116) passes through the connecting block (115) and is threadedly connected to the connecting block (115).

6. The automatic sandpaper-changing polishing machine with a dust suction function according to claim 1, characterized in that, A driven wheel (117) is fixed to the outside of the hollow column (103). A rotating shaft (118) is rotatably connected in the vertical plate (102). A driving wheel (119) is fixed to one end of the rotating shaft (118). The driving wheel (119) and the driven wheel (117) are rotationally connected by a belt (120). A second motor (121) is installed on one side of the vertical plate (102). One end of the rotating shaft (118) is fixed to the output end of the second motor (121).

7. An automatic sandpaper-changing polishing machine with a dust suction function according to claim 1, characterized in that, A U-shaped seat (138) is fixed to one side of the vertical plate (102). A first hydraulic cylinder (139) is installed on the inner wall of the U-shaped seat (138). A disc (140) is fixed to the extending end of the first hydraulic cylinder (139). A cylindrical rod (122) is slidably connected in the hollow column (103). The cylindrical rod (122) is rotationally connected to the disc (140). Limiting grooves (141) are formed in the inner walls on both sides of the U-shaped seat (138). Two limiting rods (142) are fixed to the outside of the disc (140). The limiting rods (142) are slidably fitted in the corresponding limiting grooves (141).

8. An automatic sandpaper-changing polishing machine with a dust suction function according to claim 7, characterized in that, The control component includes hollow plates (123) fixed to both sides of the rectangular plate (105). A movable plate (124) is slidably connected inside the hollow plate (123). A pulling plate (125) is fixed to the side of the movable plate (124) away from the rectangular plate (105). A U-shaped plate (126) is fixed to the inner wall of the secondary arc-shaped plate (107). The pulling plate (125) and the U-shaped plate (126) are rotatably connected. A groove (127) is formed inside the hollow plate (123). A second hinge seat (130) is fixed to the side of the movable plate (124) extending into the groove (127). L-shaped plates (128) are fixed to both sides of the rectangular frame (104). A first hinge seat (129) is fixed to the side of the L-shaped plate (128) located inside the groove (127). A first rotating rod (131) is rotatably connected inside the first hinge seat (129) and the second hinge seat (130).

9. The automatic sandpaper-changing polishing machine with a dust suction function according to claim 8, characterized in that, The driving component includes a third hinge seat (135) fixed to one side of the rectangular plate (105). A plurality of fourth hinge seats (136) are fixed to the outer side of the cylindrical rod (122) at equal intervals along its radial direction. A second rotating rod (137) is rotatably connected between the third hinge seat (135) and the fourth hinge seat (136).

10. The automatic sandpaper-changing polishing machine with a dust suction function according to claim 9, characterized in that, A tool holder (132) is fixed to one of the L-shaped plates (128). A blade (133) is fixed to one side of the tool holder (132). Notches (134) are formed in one of the main arc-shaped plates (106) and the rubber pad (109). The blade (133) can penetrate through the notch (134).

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