Woodworking polishing device with automatic clamping structure

Abstract

The invention relates to the technical field of woodworking grinding, in particular to a woodworking grinding device with an automatic clamping structure, which comprises a base, three supporting legs are correspondingly fixed at the top of a base plate, and three groups of corner grinding components for grinding wood board fillets are fixed at the top of each supporting leg respectively; a transmission assembly used for synchronous adjustment is arranged on the two corresponding angle lapping assemblies, an adjusting assembly used for adjusting the front face and the back face of the round plate to be polished is arranged on the back of the base plate, and positioning assemblies used for fixing and polishing the face of the round plate are arranged at the ends, away from the double-end bolt rod, of the single-column threaded block and the double-column threaded block. Each fixing strip is provided with a replacement assembly used for polishing the circular plate face. Through cooperative use of the angle grinding assembly, the transmission assembly, the adjusting assembly, the positioning assembly and the replacement assembly, the round corners of the circular plate can be ground and polished after the upper end and the lower end of the circular plate are ground and polished, the working efficiency is improved, the grinding and polishing accuracy is improved, and the cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of woodworking polishing, and in particular to a woodworking polishing device with an automatic clamping structure. Background Art

[0002] Polishing and grinding of wood can remove defects on the surface of the wood, making it smoother, increasing its gloss and improving its overall aesthetics. The wood surface is easier to be coated with a protective layer (such as paint, wax), which can effectively prevent the intrusion of moisture and dirt and reduce the risk of decay and deformation. After polishing, the coating can better adhere to the surface of the wood to ensure a long-lasting coating effect. The prior art requires clamping the side of the circular board when grinding and polishing a circular wooden board, and when grinding and polishing the rounded corners of the circular board, separate manual grinding and polishing is often required, which not only affects the processing accuracy, but also is time-consuming and labor-intensive, and has low processing efficiency. In addition, when it is necessary to grind and polish the side rounded corners, the side of the circular board is clamped, which often affects the grinding of the rounded corners of the circular board. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a woodworking grinding device with an automatic clamping structure.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising a base, the top of the base is fixedly connected to the pad, the top of the pad is correspondingly fixed with three legs, and the top of each leg is respectively fixed with three groups of angle grinding components for grinding the rounded corners of wooden boards; each angle grinding component comprises: a limit plate, two limit columns, two movable bars, two limit gears, two sleeve columns, two movable columns, two first transmission shafts, two clips, a limit bar and a sliding block; wherein the limit plate is fixed on the legs, the two limit columns are correspondingly fixed on one side of the limit plate, and the limit plate is provided with Two corresponding bearings, two first transmission shafts are respectively fixed to the two bearing inner rings on the limit plate, two limit gears are respectively fixed to the two first transmission shafts, and the two limit gears are meshed, two movable bars are respectively movably connected to the two limit columns, two sleeve columns are respectively fixed on the two limit gears, and the two movable bars are provided with movable holes for the sleeve column movement, the two sleeve columns are respectively sleeved in the movable holes of the two movable bars, the two movable columns are respectively movably connected to the ends of the two movable bars away from the limit columns, the end of the limit plate away from the limit column is fixedly connected to the limit bar, and the two clips are respectively connected to the two The movable column is fixedly connected, and a slot for inserting a sliding block is provided on the limit bar. The two sliding blocks are inserted into the slots of the limit bar. The two sliding blocks are fixedly connected to the two clips respectively. A transmission assembly for synchronous adjustment is provided on the two corresponding grinding angle assemblies; the transmission assembly includes: two conical teeth, two double-headed gear columns, a one-way gear column, a fixed shell, a first bearing sheet and a turntable; wherein the two conical teeth are fixed on the first transmission shaft, the fixed shell is fixed on one side of the two legs, two bearings are provided on the top of the fixed shell, and the two double-headed gear columns are respectively connected to the two fixed The inner ring of the bearing on the fixed shell is fixed, the first bearing plate is fixed inside the fixed shell, a bearing is provided on the first bearing plate, the one-way gear column is fixed to the inner ring of the bearing of the first bearing plate, the gears at both ends of the two double-headed gear columns are respectively meshed with the corresponding conical teeth and the two gears on the one-way gear column, an opening is provided at one end of the fixed shell, and the end of the one-way gear column passing through the opening is fixedly connected to the turntable, the clips in the three groups of angle grinding assemblies are corresponding semi-arc blocks, and the two clips in one group of angle grinding assemblies are frosted materials for trimming the edges, and the semi-arc of the clips can clamp the side of the circular plate without contacting the upper and lower ends of the circular plate.

[0005] Preferably, through the coordinated use of the angle grinding assembly and the transmission assembly, when it is necessary to clamp the circular plate, the one-way gear column is rotated to drive the conical teeth on the first transmission shaft to rotate through the gears at both ends of the double-headed gear column, and then the conical teeth drive the first transmission shaft to rotate, the two limit gears rotate, and then the sleeve column on the limit gear rotates to drive the two movable bars to move synchronously, and then the two clips are limited by the sliding block, the two clips are adjusted according to the thickness of the edge of the circular plate, and the edge of the circular plate is fixed when adjusted to a suitable position. When the clip needs to be replaced, the sliding blocks on the two clips are translated to a state of releasing the plug-in connection with the limit bar through the rotation of the limit gear, the movable connection between the movable column and the movable bar is released, and then the clip is taken out for replacement. By setting the limiting gear, the first transmission shaft, the double-headed gear column and the one-way gear column, it is possible to prevent wood chips generated during grinding and polishing of the circular plate from entering the machine and affecting the operation, chamfering and grinding and polishing accuracy.

[0006] As a preferred technical solution of the present invention, an adjustment component for adjusting the front and back sides of the grinding circular plate is provided on the back of the pad; the adjustment component includes: a stud bolt rod, a single-column threaded block, a double-column threaded block, a second bearing plate, a linkage plate and two linkage blocks; the second bearing plate is fixed to a corresponding limit plate, a bearing is provided on the second bearing plate, the stud bolt rod is fixed to the inner ring of the bearing of the second bearing plate, the single-column threaded block and the double-column threaded block are respectively threadedly connected to the upper and lower ends of the stud bolt rod, one end of the second bearing plate is fixedly connected to the linkage plate, a slide groove for connecting the linkage blocks is provided on the linkage plate, the two linkage blocks are inserted in the slide groove of the linkage plate, and the two linkage blocks are respectively The single-column threaded block and the double-column threaded block are fixedly connected, and one end of the single-column threaded block and the double-column threaded block away from the stud bolt rod is provided with a positioning assembly for fixing and grinding the circular plate surface; the positioning assembly includes: two motors, two supporting columns, two second transmission shafts, two bearing plates, four baffle plates and two fixing strips; wherein, one end of the single-column threaded block and the double-column threaded block away from the stud bolt rod is respectively fixed to the two supporting columns, each supporting column is provided with an opening for connecting the second transmission shaft, the two second transmission shafts are respectively fixed in the openings of the two supporting columns, the two motors are correspondingly arranged at one end of the two second transmission shafts, the second transmission shaft is fixed to the output shaft of the motor, and the two bearing plates are provided with bearings, The ends of the two second transmission shafts away from the motor are fixed to the inner ring of the bearing on a bearing plate, and two baffles are fixed to the end of each bearing plate away from the second transmission shaft, and a fixing strip is fixed in the middle of each two baffles. The double columns of the double-column threaded block are V-shaped, and the size of the double columns of the second bearing plate is larger than the angle grinding component. A replacement component for grinding the circular plate surface is provided on each fixing strip; each replacement component includes: a fixing block, a rotating column, a clamping strip, a plurality of clamping blocks, a grinding strip, a plurality of limit blocks and a cross block; wherein the fixing block is an inverted U-shape, the fixing block is fixed on the fixing strip, a plurality of limit blocks are correspondingly fixed on the rotating column, and the fixing block is provided with a A round long hole, a round hole is provided at the position corresponding to the fixing strip, and the round long hole of the fixing block is connected with the round hole of the fixing strip, the fixing strip is provided with a long cavity, and the long cavity of the fixing strip is connected with the round hole of the fixing strip, the card strip is arranged in the long hole cavity of the fixing strip, and the lower end of the card strip is provided with a plurality of arc holes for plugging in the card blocks, the top of the grinding strip is fixedly connected with a plurality of card blocks, and a plurality of card blocks are plugged in the arc holes of the card strip, and bearings are provided at the positions corresponding to the round holes of the card strip and the fixing strip, the rotating column is fixed to the inner ring of the bearing of the card strip, and the top of the rotating column is fixed to the cross block, the grinding strip is a frosted structure for grinding the circular plate, the two ends of the fixing strip are semi-arc angles, and the curvature of the semi-arc angle of the fixing strip can avoid the clamp, and the length of the grinding strip corresponds to the diameter of the circular plate.

[0007] Preferably, through the coordinated use of the adjusting assembly, the positioning assembly and the replacement assembly, when it is necessary to grind the surface of the circular plate, the stud bolt rod is rotated, and the single-column threaded block and the double-column threaded block on the stud bolt rod are moved toward the two ends of the circular plate in the middle, the rotating column is rotated to make the grinding strip correspond to the long circular hole on the fixed block, and the rotating column is pushed to move toward the long hole cavity of the fixed block, and then the clamping strip drives the grinding strip to be close to the upper and lower ends of the circular plate, and the rotating column is rotated to make the grinding strip leave the long circular hole position of the fixed block, and then the grinding strip is started after the motor is started to grind the upper and lower ends of the circular plate. When it is necessary to replace the grinding strip, the plug-in relationship between the clamping strip and the clamping block is released, and then the grinding strip is replaced; when it is necessary to chamfer and trim the circular plate, the lifting and pulling rotating column is rotated to make the grinding strip enter the interior of the fixed strip, and the stud bolt rod is rotated, and then the two single-column threaded blocks are moved toward the opposite The gears on both ends of the double-headed gear column drive the conical teeth on the first transmission shaft to rotate. While the conical teeth drive the first transmission shaft to rotate, the two limit gears rotate, and then the sleeve column on the limit gear rotates to drive the two movable bars to move synchronously. The two movable bars drive the clamps to adjust to the right-angle position corresponding to the circular plate through the movable column and fit with the circular plate. The motor is started, and then the motor drives the corresponding fixed bar to rotate through the second transmission shaft. The two fixed bars drive the fixed circular plate to rotate on its own. When the circular plate rotates, the right-angle side of the circular plate fits with the two clamps, and then the circular plate is chamfered and edged by the clamps when it is driven by the motor to rotate.

[0008] Compared with the prior art, the present invention can achieve the following beneficial effects: 1. Through the coordinated use of the angle grinding assembly and the transmission assembly, the circular plate can be effectively fixed, and then the upper and lower ends of the circular plate can be ground. When the circular plate needs to be chamfered and ground, the circular plate can be chamfered and ground, and the synchronous operation can avoid affecting the accuracy of the chamfer.

[0009] 2. Through the coordinated use of the adjustment component, the positioning component and the replacement component, the upper and lower ends of the circular plate can be accurately ground and polished, and the circular plate can be clamped and restricted when the rounded corners of the circular plate are ground.

[0010] 3. Through the coordinated use of the angle grinding assembly, transmission assembly, adjustment assembly, positioning assembly and replacement assembly, the upper and lower ends of the circular plate can be ground and polished, and then the rounded corners of the circular plate can be ground and polished, which enhances work efficiency, improves the accuracy of grinding and polishing, saves costs, and avoids the phenomenon of bumping caused by the circular plate being turned over and moved during grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2It is a schematic diagram of the backing plate structure of the present invention; Figure 3 is a schematic structural diagram of a second bearing sheet of the present invention; Figure 4 It is a schematic diagram of the structure of the limiting plate of the present invention; Figure 5 It is a schematic diagram of the structure of the stud bolt rod of the present invention; Figure 6 It is a schematic diagram of the support column structure of the present invention; Figure 7 It is a schematic diagram of the fixing bar structure of the present invention; Figure 8 for Figure 7 Schematic diagram of the local structure of A; Fig. 9 It is a schematic diagram of the double-headed gear column structure of the present invention.

[0012] Wherein: 1. base; 2. pad; 3. support leg; 4. limit plate; 5. limit column; 6. movable bar; 7. limit gear; 8. sleeve column; 9. movable column; 10. first transmission shaft; 11. clip; 12. limit bar; 13. sliding block; 14. movable hole; 15. stud bolt rod; 16. single column threaded block; 17. motor; 18. support column; 19. second transmission shaft; 20. bearing plate; 21. baffle plate; 22. fixing bar; 23. fixing block; 24. rotating column; 25. clamping bar; 26. clamping block; 27. grinding bar; 28. cross block; 29. ​​conical tooth; 30. double-headed gear column; 31. one-way gear column; 32. fixed shell; 33. first bearing plate; 34. rotating plate; 35. double column threaded block; 36. second bearing plate; 37. linkage plate; 38. linkage block; 39. limit block. DETAILED DESCRIPTION

[0013] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following embodiments, unless otherwise specified, can all be obtained from commercial channels.

[0014] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Fig. 9As shown, it includes a base 1, the top of the base 1 is fixedly connected to the pad 2, the top of the pad 2 corresponds to three legs 3 fixed, and the top of each leg 3 is respectively fixed with three groups of angle grinding components for grinding the rounded corners of wooden boards; each angle grinding component includes: a limit plate 4, two limit columns 5, two movable bars 6, two limit gears 7, two sleeve columns 8, two movable columns 9, two first transmission shafts 10, two clips 11, a limit bar 12 and a sliding block 13; wherein the limit plate 4 is fixed on the leg 3, the two limit columns 5 are correspondingly fixed on one side of the limit plate 4, the limit plate 4 is provided with two corresponding bearings, and the two first transmission shafts 10 are respectively The two limit gears 7 are respectively fixed to the two first transmission shafts 10, and the two limit gears 7 are meshed. The two movable bars 6 are respectively movably connected to the two limit columns 5. The two limit gears 7 are respectively fixed to the two sleeve columns 8. The two movable bars 6 are provided with movable holes 14 for the movement of the sleeve columns 8. The two sleeve columns 8 are respectively sleeved in the movable holes 14 of the two movable bars 6. The two movable columns 9 are respectively movably connected to one end of the two movable bars 6 away from the limit column 5. The end of the limit plate 4 away from the limit column 5 is fixedly connected to the limit bar 12. The two clips 11 are respectively fixedly connected to the two movable columns 9. There is a slot for the sliding block 13 to be inserted, the two sliding blocks 13 are inserted into the slots of the limit strip 12, the two sliding blocks 13 are respectively fixedly connected to the two clips 11, and a transmission assembly for synchronous adjustment is provided on the two corresponding grinding angle assemblies; the transmission assembly includes: two conical teeth 29, two double-headed gear columns 30, a one-way gear column 31, a fixed shell 32, a first bearing sheet 33 and a rotating disk 34; wherein the two conical teeth 29 are fixed on the first transmission shaft 10, the fixed shell 32 is fixed on one side of the two legs 3, the top of the fixed shell 32 is provided with two bearings, the two double-headed gear columns 30 are respectively connected to the two fixed shells 32 The inner ring of the bearing is fixed, and the first bearing plate 33 is fixed inside the fixed shell 32. A bearing is provided on the first bearing plate 33. The one-way gear column 31 is fixed to the inner ring of the bearing of the first bearing plate 33. The gears at both ends of the two double-headed gear columns 30 are respectively meshed with the corresponding conical teeth 29 and the two gears on the one-way gear column 31. An opening is provided at one end of the fixed shell 32, and one end of the one-way gear column 31 passing through the opening is fixedly connected to the turntable 34. The clips 11 in the three groups of angle grinding assemblies are all corresponding semi-arc blocks, and the two clips 11 in one group of angle grinding assemblies are frosted materials for trimming the edges. The semi-arc of the clips 11 can clamp the side of the circular plate without contacting the upper and lower ends of the circular plate.

[0015] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the back of the pad 2 is provided with an adjustment component for adjusting the front and back sides of the grinding circular plate; the adjustment component includes: a stud bolt rod 15, a single-column threaded block 16, a double-column threaded block 35, a second bearing plate 36, a linkage plate 37 and two linkage blocks 38; the second bearing plate 36 is fixed to a corresponding limit plate 4, the second bearing plate 36 is provided with a bearing, the stud bolt rod 15 is fixed to the inner ring of the bearing of the second bearing plate 36, the single-column threaded block 16 and the double-column threaded block 35 are respectively threadedly connected to the upper and lower ends of the stud bolt rod 15, and the second bearing plate 36 is provided with a bearing. One end of the second bearing sheet 36 is fixedly connected to the linkage plate 37, and the linkage plate 37 is provided with a slide groove for connecting the linkage block 38. The two linkage blocks 38 are inserted into the slide groove of the linkage plate 37. The two linkage blocks 38 are respectively fixedly connected to the single-column threaded block 16 and the double-column threaded block 35. The ends of the single-column threaded block 16 and the double-column threaded block 35 away from the stud bolt rod 15 are provided with a positioning component for fixing and grinding the circular plate surface; the positioning component includes: two motors 17, two support columns 18, two second transmission shafts 19, two bearing plates 20, four baffle plates 21 and two The fixing strip 22; wherein, the ends of the single-column threaded block 16 and the double-column threaded block 35 away from the stud bolt rod 15 are respectively fixed to the two support columns 18, each support column 18 is provided with an opening for connecting the second transmission shaft 19, and the two second transmission shafts 19 are respectively fixed in the openings of the two support columns 18, and the two motors 17 are correspondingly arranged at one end of the two second transmission shafts 19, and the second transmission shaft 19 is fixed to the output shaft of the motor 17, and the two bearing plates 20 are provided with bearings, and the ends of the two second transmission shafts 19 away from the motor 17 are connected to a bearing plate 2 0, the inner ring of the upper bearing is fixed, two baffle plates 21 are fixed to one end of each bearing plate 20 away from the second transmission shaft 19, and a fixing strip 22 is fixed in the middle of each two baffle plates 21, the double columns of the double-column threaded block 35 are V-shaped, and the size of the double columns of the second bearing plate 36 is larger than the angle grinding component, and each fixing strip 22 is provided with a replacement component for grinding the circular plate surface; each replacement component includes: a fixing block 23, a rotating column 24, a clamping strip 25, a plurality of clamping blocks 26, a grinding strip 27, a plurality of limit blocks 39 and a cross block 28;Among them, the fixing block 23 is an inverted U shape, the fixing block 23 is fixed on the fixing bar 22, and a plurality of limit blocks 39 are fixed on the rotating column 24. The fixing block 23 is provided with a round long hole for plugging the rotating column 24, and a round hole is provided at a corresponding position of the fixing bar 22, and the round long hole of the fixing block 23 is connected with the round hole of the fixing bar 22, and the fixing bar 22 is provided with a long cavity, and the long cavity of the fixing bar 22 is connected with the round hole of the fixing bar 22, and the card strip 25 is arranged in the long hole cavity of the fixing bar 22, and the lower end of the card strip 25 is provided with a plurality of card The top of the grinding strip 27 is fixedly connected with several clamping blocks 26, and several clamping blocks 26 are inserted in the arc hole of the clamping strip 25. The clamping strip 25 is provided with bearings at positions corresponding to the circular holes of the fixed strip 22. The rotating column 24 is fixed to the inner ring of the bearing of the clamping strip 25, and the top of the rotating column 24 is fixed to the cross block 28. The grinding strip 27 is a frosting structure for grinding the circular plate. The two ends of the fixed strip 22 are semi-arc angles. The arc of the semi-arc angle of the fixed strip 22 can avoid the clip 11. The length of the grinding strip 27 corresponds to the diameter of the circular plate. ;

[0016] Working principle: When the circular plate needs to be clamped, the one-way gear column 31 is rotated to drive the conical teeth 29 on the first transmission shaft 10 to rotate through the gears at both ends of the double-headed gear column 30, and then the conical teeth 29 drive the first transmission shaft 10 to rotate, and the two limit gears 7 rotate, and then the sleeve column 8 on the limit gear 7 rotates to drive the two movable bars 6 to move synchronously, and then the two clips 11 are limited by the sliding block 13, and the two clips 11 are adjusted according to the thickness of the edge of the circular plate. When the circular plate edge is adjusted to a suitable position, the edge of the circular plate is fixed. When the clip 11 needs to be replaced, the sliding block 13 on the two clips 11 is translated to the state of releasing the plug-in state with the limit bar 12 through the rotation of the limit gear 7, releasing the movable column 9 from the movable The movable connection of the strip 6 can be used to take out the clip 11 for replacement. By setting the limit gear 7, the first transmission shaft 10, the double-headed gear column 30 and the one-way gear column 31, it is possible to prevent the wood chips generated by the circular plate during grinding and polishing from entering the machine and affecting the operation, chamfering and grinding and polishing accuracy. When it is necessary to grind the circular plate surface, the stud bolt rod 15 is rotated, and the single-column threaded block 16 and the double-column threaded block 35 on the stud bolt rod 15 are moved toward the middle to the two ends of the circular plate, and the rotating column 24 is rotated to make the grinding strip 27 correspond to the round and long hole on the fixed block 23, and the rotating column 24 is pushed to move toward the long hole cavity of the fixed block 23, and then the clamping strip 25 drives the grinding strip 27 to be close to the upper and lower ends of the circular plate, and the rotating column 2 4 makes the grinding strip 27 leave the round long hole position of the fixing block 23, and then starts the motor 17 to grind the upper and lower ends of the circular plate. When the grinding strip 27 needs to be replaced, the plug-in relationship between the clamping strip 25 and the clamping block 26 is released, and then the grinding strip 27 is replaced. When the circular plate needs to be chamfered and trimmed, the lifting and pulling rotating column 24 is rotated to make the grinding strip 27 enter the interior of the fixing strip 22, and by rotating the stud bolt rod 15, the two single-column threaded blocks 16 move in the corresponding direction, and the single-column threaded blocks 16 drive the fixing strip 22 to fit the fixing circular plate. According to the required fillet size, the clip 11 is replaced to the required size, and then the one-way gear column 31 is rotated through the double-headed gear column 3 The gears at both ends of 0 drive the conical teeth 29 on the first transmission shaft 10 to rotate. When the conical teeth 29 drive the first transmission shaft 10 to rotate, the two limit gears 7 rotate, and then the sleeve column 8 on the limit gear 7 rotates to drive the two movable bars 6 to move synchronously. The two movable bars 6 drive the clamping pieces 11 to adjust to the right-angle position corresponding to the circular plate through the movable column 9, and fit with the circular plate, start the motor 17, and then the motor 17 drives the corresponding fixed bar 22 to rotate through the second transmission shaft 19, and the two fixed bars 22 drive the fixed circular plate to rotate. When the circular plate rotates, the right-angle side of the circular plate fits with the two clamping pieces 11, and then the circular plate is chamfered and edged by the clamping pieces 11 when it is driven by the motor 17 to rotate.

[0017] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A woodworking grinding device with an automatic clamping structure, comprising a base (1), the top of the base (1) being fixedly connected to a backing plate (2), characterized in that: Three legs (3) are fixed to the top of the backing plate (2), and three groups of grinding components for grinding the rounded corners of the wooden board are fixed to the top of each leg (3); Each angle grinding assembly comprises: a limit plate (4), two limit columns (5), two movable bars (6), two limit gears (7), two sleeve columns (8), two movable columns (9), two first transmission shafts (10), two clips (11), a limit bar (12) and a sliding block (13); The limiting plate (4) is fixed on the supporting leg (3), the two limiting columns (5) are correspondingly fixed on one side of the limiting plate (4), the limiting plate (4) is provided with two corresponding bearings, the two first transmission shafts (10) are respectively fixed to the two inner rings of the bearings on the limiting plate (4), the two limiting gears (7) are respectively fixed on the two first transmission shafts (10), and the two limiting gears (7) are meshed, the two movable bars (6) are respectively movably connected to the two limiting columns (5), the two limiting gears (7) are respectively fixed to the two sleeve columns (8), and the two movable bars (6) are provided with movable parts for the sleeve columns (8) to move. The movable holes (14) are provided in the movable holes (14) of the two movable bars (6), the two movable bars (9) are movably connected to the ends of the two movable bars (6) away from the limiting bars (5), the end of the limiting plate (4) away from the limiting bars (5) is fixedly connected to the limiting bars (12), the two clips (11) are fixedly connected to the two movable bars (9), the limiting bars (12) are provided with slots for inserting the sliding blocks (13), the two sliding blocks (13) are inserted into the slots of the limiting bars (12), and the two sliding blocks (13) are fixedly connected to the two clips (11).

2. A woodworking grinding device with an automatic clamping structure according to claim 1, characterized in that: The back of the backing plate (2) is provided with an adjustment component for adjusting the front and back sides of the grinding circular plate; The adjustment assembly comprises: a stud bolt rod (15), a single-column threaded block (16), a double-column threaded block (35), a second bearing plate (36), a linkage plate (37) and two linkage blocks (38); The second bearing plate (36) is fixed to a corresponding limiting plate (4), a bearing is provided on the second bearing plate (36), the stud bolt rod (15) is fixed to the inner ring of the bearing of the second bearing plate (36), the single-column threaded block (16) and the double-column threaded block (35) are respectively threadedly connected to the upper and lower ends of the stud bolt rod (15), one end of the second bearing plate (36) is fixedly connected to the linkage plate (37), a sliding groove for connecting the linkage block (38) is provided on the linkage plate (37), the two linkage blocks (38) are inserted into the sliding groove of the linkage plate (37), and the two linkage blocks (38) are respectively fixedly connected to the single-column threaded block (16) and the double-column threaded block (35).

3. A woodworking grinding device with an automatic clamping structure according to claim 2, characterized in that: The ends of the single-column threaded block (16) and the double-column threaded block (35) away from the stud bolt rod (15) are provided with positioning components for fixing and grinding the circular plate surface; The positioning assembly comprises: two motors (17), two support columns (18), two second transmission shafts (19), two bearing plates (20), four baffle plates (21) and two fixing bars (22); The ends of the single-column threaded block (16) and the double-column threaded block (35) away from the stud bolt rod (15) are respectively fixed to two support columns (18); each support column (18) is provided with an opening for connecting the second transmission shaft (19); the two second transmission shafts (19) are respectively fixed in the openings of the two support columns (18); the two motors (17) are correspondingly arranged at one end of the two second transmission shafts (19); the second transmission shafts (19) are fixed to the output shafts of the motors (17); the two bearing plates (20) are provided with bearings; the ends of the two second transmission shafts (19) away from the motors (17) are fixed to the inner ring of the bearing on a bearing plate (20); the ends of each bearing plate (20) away from the second transmission shaft (19) are fixed to two baffle plates (21); and a fixing strip (22) is fixed in the middle of each of the two baffle plates (21); the double columns of the double-column threaded block (35) are arranged in a V shape, and the size of the double columns of the second bearing plate (36) is larger than the angle grinding assembly.

4. A woodworking grinding device with an automatic clamping structure according to claim 3, characterized in that: Each of the fixing bars (22) is provided with a replacement component for grinding the circular plate surface; Each replacement assembly comprises: a fixed block (23), a rotating column (24), a clamping bar (25), a plurality of clamping blocks (26), a grinding bar (27), a plurality of limit blocks (39) and a cross block (28); The fixing block (23) is in an inverted U shape, the fixing block (23) is fixed on the fixing bar (22), a plurality of limit blocks (39) are correspondingly fixed on the rotating column (24), the fixing block (23) is provided with a round long hole for plugging the rotating column (24), a round hole is provided at a corresponding position of the fixing bar (22), and the round long hole of the fixing block (23) is connected to the round hole of the fixing bar (22), the fixing bar (22) is provided with a long cavity, and the long cavity of the fixing bar (22) is connected to the round hole of the fixing bar (22), and the card The strip (25) is arranged in the long hole cavity of the fixed strip (22); the lower end of the clamping strip (25) is provided with a plurality of arc holes for plugging the clamping blocks (26); the top of the grinding strip (27) is fixedly connected to the plurality of clamping blocks (26); the plurality of clamping blocks (26) are plugged into the arc holes of the clamping strip (25); bearings are provided at positions corresponding to the circular holes of the clamping strip (25) and the fixed strip (22); the rotating column (24) is fixed to the inner ring of the bearing of the clamping strip (25); and the top of the rotating column (24) is fixed to the cross block (28).

5. The woodworking grinding device with an automatic clamping structure according to claim 1, characterized in that: The two corresponding angle grinding assemblies are provided with a transmission assembly for synchronous adjustment; The transmission assembly comprises: two conical teeth (29), two double-headed gear columns (30), a one-way gear column (31), a fixed shell (32), a first bearing plate (33) and a rotating disk (34); The two conical teeth (29) are fixed on the first transmission shaft (10), the fixed shell (32) is fixed on one side of the two legs (3), two bearings are arranged on the top of the fixed shell (32), the two double-headed gear columns (30) are respectively fixed to the inner rings of the bearings on the two fixed shells (32), the first bearing sheet (33) is fixed inside the fixed shell (32), the first bearing sheet (33) is provided with a bearing, the one-way gear column (31) is fixed to the inner ring of the bearing of the first bearing sheet (33), the gears at both ends of the two double-headed gear columns (30) are respectively meshed with the corresponding conical teeth (29) and the two gears on the one-way gear column (31), one end of the fixed shell (32) is provided with an opening, and one end of the one-way gear column (31) passing through the opening is fixedly connected to the rotating disk (34).

6. A woodworking grinding device with an automatic clamping structure according to claim 1, characterized in that: The clips (11) in the three groups of angle grinding assemblies are all corresponding semi-arc blocks, and two clips (11) in one group of angle grinding assemblies are made of frosted material for trimming the edges, and the semi-arcs of the clips (11) can clamp the side of the circular plate without contacting the upper and lower ends of the circular plate.

7. A woodworking grinding device with an automatic clamping structure according to claim 4, characterized in that: The grinding strip (27) is a grinding structure used for grinding a circular plate. Both ends of the fixed strip (22) are semi-arc angles. The arc of the semi-arc angle of the fixed strip (22) can avoid the clamping piece (11). The length of the grinding strip (27) corresponds to the diameter of the circular plate.

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