Automatic double-sided sanding machine

Abstract

The invention discloses an automatic double-sided sanding machine, and relates to the technical field of sanding machines, the automatic double-sided sanding machine comprises a bottom frame, a vertical frame is fixedly connected to one side of the bottom frame, a fixed plate is fixedly connected to the lower end of the vertical frame, a movable plate is arranged above the fixed plate, sliding sleeves are fixedly connected to the two sides of the movable plate, and the sliding sleeves are in sliding connection with the vertical frame; the fixed plate and the movable plate are provided with sanding mechanisms used for polishing the two faces of a workpiece, and the vertical frame is provided with a lifting mechanism used for adjusting the distance between the fixed plate and the movable plate. A small workpiece can be driven to pass through the space between the two sanding belts during working through the pushing mechanism, sanding treatment on the two faces of the workpiece is achieved through operation of the two sanding belts when the workpiece passes through, and due to the fact that the pushing mechanism is adopted to guide the workpiece to move, the problem that the small workpiece cannot pass through a sanding area in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sanding machines, in particular to an automatic double-sided sanding machine. BACKGROUND

[0002] Sanding is a key process to ensure that the surface flatness and roughness of a workpiece meet the processing standards, directly affecting the subsequent assembly precision and product appearance quality. Traditional single-sided sanding machines require manual flipping of the workpiece multiple times to complete double-sided sanding, which is relatively cumbersome. Double-sided sanding machines, on the other hand, have the core advantage of simultaneously sanding the upper and lower surfaces of the workpiece, significantly reducing processing cycle time and improving production efficiency, and have become the mainstream equipment for standardized processing of workpiece double sides in batch processing scenarios. For example, a double-sided sanding machine for plate material is disclosed in the authorized announcement CN222243945U. The sanding machine includes a machine body and a mounting frame. The front and rear sides of the machine body are fixedly connected with support plates at both openings. An electric conveyor belt is arranged between the two support plates on the same side and the machine body. The device uses an electric conveyor belt to transport the plate material, and the sanding process of the plate material surface is realized when the plate material passes through the sanding roller.

[0003] The above-mentioned double-sided sanding machine is mainly suitable for long workpieces. During sanding, the front end conveying assembly and the rear end conveying assembly of the conveying mechanism can be connected. The front end assembly provides feeding power, and the rear end assembly receives and pulls the workpiece to move continuously, ensuring that the conveying power does not stop when the workpiece passes through the sanding area, and stable double-sided sanding can be completed. However, this structure cannot be applied to small workpieces. Due to the insufficient length of small workpieces, they cannot be effectively connected to the conveying assemblies at both ends of the equipment. After entering the sanding area, the front end conveying assembly cannot continue to provide feeding power, and the rear end conveying assembly cannot be timely received, causing the workpiece to be easily stuck in the sanding area, or even unable to smoothly pass through the sanding area, making it difficult to achieve double-sided sanding of small workpieces. Therefore, we provide an automatic double-sided sanding machine to solve the above-mentioned problems. SUMMARY

[0004] The present application aims to provide an automatic double-sided sanding machine to solve the problems mentioned in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: The utility model provides an automatic double -sided sander, including the chassis, one side of chassis is fixedly connected with vertical frame, vertical frame lower extreme is fixedly connected with fixed plate, and the movable plate is equipped above fixed plate, and both sides of movable plate are fixedly connected with sliding sleeve, and sliding sleeve is connected with vertical frame slidingly, be equipped with sanding mechanism for the two sides of workpiece are polished on fixed plate and movable plate, be equipped with lifting mechanism for adjusting the interval between fixed plate and movable plate on vertical frame, both sides of chassis are fixedly connected with support side frame, the top of one side of chassis is equipped with ring rail, and a plurality of inner bracing plates are fixedly connected in ring rail, and support side frame upper end is fixedly connected with inner bracing plate, be equipped with a plurality of with ring rail matched rolling wheel sliding seat on ring rail, be equipped with drive assembly for driving rolling wheel sliding seat and run along ring rail in ring rail, one end of chassis is fixedly connected with feeding table using support, be equipped with push -move mechanism for realizing double -sided polishing of workpiece through sanding mechanism on rolling wheel sliding seat.

[0006] As a further scheme of the utility model: the sanding mechanism includes transmission roller, the transmission roller is rotatably connected at both ends of the movable plate and the fixed plate respectively, a sand belt is installed between the two transmission rollers at the same horizontal height, a second right-angle speed reducer motor is fixedly connected to the side of the movable plate and the fixed plate away from the transmission roller, the output shaft of the second right-angle speed reducer motor is fixedly connected with the axle of the transmission roller, L-shaped frames are fixedly connected to both ends of the movable plate and the fixed plate, the L-shaped frames are rotatably connected with the axles of the transmission roller away from the inner bracing plate respectively, the movable plate and the fixed plate are both provided with a tensioning assembly for adjusting the tension of the sand belt, and the inner bracing plates are fixedly connected to the opposite sides of the movable plate and the fixed plate.

[0007] As a further scheme of the utility model: the tensioning assembly includes two support cross plates, the support cross plates are fixedly connected at the middle positions of the movable plate and the fixed plate respectively, sliding rods are slidably connected to both ends of the support cross plates, U-shaped frames are fixedly connected between the sliding rods close to the sand belt, tensioning rollers are rotatably connected in the U-shaped frames, third threaded rods are rotatably connected in the middle of the U-shaped frames, the third threaded rods are threadedly connected with the support cross plates, first shaft lockers are further provided on the U-shaped frames for locking the third threaded rods, and handles are fixedly connected to the upper ends of the third threaded rods.

[0008] As a further scheme of the utility model: the lifting mechanism includes a second threaded rod, the second threaded rod is rotatably connected in the middle of the vertical frame, sliding rods are provided on the opposite sides of the two sliding sleeves, the sliding rods are fixedly connected with the sliding sleeves through supports at both ends, lifting blocks are threadedly connected on the second threaded rod, the lifting blocks are slidably connected with the sliding rods at both ends respectively, springs are sleeved on the positions of the sliding rods between the lifting blocks and the supports at the lower ends of the sliding rods, a second shaft locker is arranged at the lower end of the vertical frame for locking the second threaded rod, and a rotating handle is fixedly connected to the lower end of the second threaded rod.

[0009] As a further scheme of the present application: the driving assembly comprises a chain wheel and chain transmission mechanism matched with the annular track, the chain wheel and chain transmission mechanism is installed on the inner support plate in the annular track, the roller slide base is provided with a connecting piece connected with the chain on one side of the roller slide base, and the inner support plate at one end of the annular track is provided with a first speed reducer motor for driving the chain wheel to rotate.

[0010] As a further scheme of the present application: the pushing mechanism comprises a sliding seat, the sliding seat is fixedly connected to the upper end of the roller slide base, a sliding plate is slidably connected in the sliding seat, hole seats are fixedly connected to both sides of the end of the sliding plate close to the sanding mechanism, and a workpiece placing frame is further arranged at the end of the sliding plate.

[0011] As a further scheme of the present application: the reciprocating mechanism comprises a pinion, the pinion is rotatably connected at the middle position of the two side plates, a driving frame is fixedly connected to the upper end of the pinion connecting shaft, an adjusting block is slidably connected in the driving frame, a stirring column is fixedly connected to the upper end of the adjusting block, the stirring column is arranged in the strip-shaped sliding frame, an adjusting assembly is arranged in the driving frame for adjusting the position of the adjusting block, a large gear is rotatably connected between one side of the side plate, the large gear is engaged with the pinion, a swing rod is fixedly connected to the lower end of the large gear connecting shaft, an end roller is rotatably connected to the end of the swing rod, and a matching track is arranged on the support side frame and matched with the end roller to swing the swing rod.

[0012] As a further scheme of the present application: the adjusting assembly comprises a first threaded rod, the first threaded rod is rotatably connected in the driving frame, the first threaded rod is threadedly connected with the adjusting block, one end of the driving frame is fixedly connected with a rotating sleeve, the rotating sleeve is rotatably connected with the end shaft of the first threaded rod, a locking screw is threadedly connected to the rotating sleeve for locking the first threaded rod, and a hexagonal block is fixedly connected to the end of the first threaded rod penetrating out of the rotating sleeve.

[0013] As a further scheme of the present application: the matching track comprises a track body, the track body is arranged at a position close to the annular track, a support arm is fixedly connected to the track body, a limiting groove is arranged on the surface of the track body, the end roller is arranged in the limiting groove, a wave groove is arranged on the upper end of the track body corresponding to the sand belt, and the wave groove is communicated with the limiting groove at both ends.

[0014] As a further embodiment of the present invention: an inclined discharge hopper is fixedly connected to the end of the base frame away from the loading platform.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention features a pusher mechanism that allows small workpieces to pass between two sanding belts during operation. As the workpiece passes through, the rotation of the two sanding belts achieves sanding treatment on both sides of the workpiece. By using a pusher mechanism to guide the workpiece movement, the problem of small workpieces being unable to pass through the sanding area in existing technologies is avoided. At the same time, the reciprocating mechanism allows the workpiece to repeatedly move laterally as it passes through the sanding area, improving the sanding effect while dispersing the wear area of ​​the sanding belts, increasing the utilization rate of abrasive grains, and extending the service life of the sanding belts. Furthermore, the workpiece placement frame can be replaced according to the shape and size of the workpiece, making it suitable for double-sided sanding of small workpieces of different shapes and sizes, greatly expanding the applicability of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure on the back of the present invention.

[0018] Figure 3 This is a schematic diagram of the sanding mechanism in this invention.

[0019] Figure 4 This is a schematic diagram of the tensioning component in this invention.

[0020] Figure 5 This is a schematic diagram of the lifting mechanism in this invention.

[0021] Figure 6 This is a schematic diagram of the driving component in this invention.

[0022] Figure 7 This is a schematic diagram of the pushing mechanism in this invention.

[0023] Figure 8 This is a schematic diagram of the reciprocating mechanism in this invention.

[0024] Figure 9 This is a schematic diagram of the adjustment component in this invention.

[0025] Figure 10 This is a schematic diagram of the structure that mates with the track in this invention.

[0026] The components include: 1. Base frame; 2. Support side frame; 3. Drive assembly; 4. Pushing mechanism; 5. Sanding mechanism; 6. Vertical frame; 7. Movable plate; 8. Lifting mechanism; 9. Loading platform; 10. Circular track; 11. Inner support plate; 12. Discharge hopper; 13. Fixed plate; 14. Roller slide; 15. Sliding sleeve. 31. First geared motor; 32. Connecting component; 33. Sprocket and chain drive mechanism; 41. Sliding seat; 42. Strip slide frame; 43. Side plate; 44. Reciprocating mechanism; 45. Sliding plate; 46. Workpiece placement frame; 47. Mounting screw; 48. Hole seat; 441. Large gear; 442. Swing rod; 443. Small gear; 444. End roller; 445. Drive frame; 446. Adjusting block; 447. Pulley; 431. First threaded rod; 432. Rotating sleeve; 433. Hexagonal block; 434. Locking screw; 435. Rail body; 436. Wave groove; 437. Limiting groove; 51. Drive roller; 52. L-shaped frame; 53. Inner support plate; 54. Second right-angle geared motor; 55. Sanding belt; 56. Tensioning assembly; 561. Third threaded rod; 562. Support cross plate; 563. Sliding rod; 564. U-shaped frame; 565. First shaft locking device; 566. Tensioning roller; 81. Lifting bar; 82. Spring; 83. Second threaded rod; 84. Second shaft locking device; 85. Sliding rod. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1 and Figure 2 In this embodiment of the invention, an automatic double-sided sander includes a base frame 1, a vertical frame 6 fixedly connected to one side of the base frame 1, a fixed plate 13 fixedly connected to the lower end of the vertical frame 6, a movable plate 7 provided above the fixed plate 13, and sliding sleeves 15 fixedly connected to both sides of the movable plate 7. The sliding sleeves 15 are slidably connected to the vertical frame 6. A sanding mechanism 5 for grinding both sides of the workpiece is provided on the fixed plate 13 and the movable plate 7. Please see Figures 1-3The sanding mechanism 5 includes drive rollers 51, which are rotatably connected to both ends of the movable plate 7 and the fixed plate 13. A sanding belt 55 is installed between the two drive rollers 51 at the same horizontal height. A second right-angle reduction motor 54 is fixedly connected to the side of the movable plate 7 and the fixed plate 13 away from the drive rollers 51. The output shaft of the second right-angle reduction motor 54 is fixedly connected to the axle of the drive rollers 51. L-shaped frames 52 are fixedly connected to both ends of the movable plate 7 and the fixed plate 13. The L-shaped frames 52 are rotatably connected to the axle of the drive rollers 51 away from the inner support plate 53. The movable plate 7 and the fixed plate 13... Both are equipped with a tensioning assembly 56 for adjusting the tension of the sanding belt 55. An inner support plate 53 is fixedly connected to the opposite side of the movable plate 7 and the fixed plate 13. During operation, the second right-angle reduction motor 54 drives the transmission roller 51 to rotate. The rotation of the transmission roller 51 drives the sanding belt 55 to rotate. The two sanding belts 55 on the movable plate 7 and the fixed plate 13 rotate, which can grind the workpiece passing between the two sanding belts 55. During grinding, the two sides of the workpiece contact the sanding belt 55 respectively, thereby realizing synchronous double-sided grinding. The tensioning assembly 56 is used to tension the sanding belt 55 to maintain good tension and ensure stable operation.

[0029] Please see Figure 3 and Figure 4 The tensioning assembly 56 includes two supporting horizontal plates 562, which are fixedly connected to the middle of the movable plate 7 and the fixed plate 13, respectively. Sliding rods 563 are slidably connected to both ends of each supporting horizontal plate 562. A U-shaped frame 564 is fixedly connected between the ends of the sliding rods 563 near the sanding belt 55. A tensioning roller 566 is rotatably connected inside the U-shaped frame 564. A third threaded rod 561 is rotatably connected to the middle of the U-shaped frame 564, and the third threaded rod 561 is threadedly connected to the supporting horizontal plates 562. A first shaft locking device 565 is also provided on the U-shaped frame 564 for locking the third threaded rod 561. Device 565 is located at the unthreaded end of the third threaded rod 561 near the U-shaped frame 564. A handle is fixedly connected to the upper end of the third threaded rod 561. When it is necessary to adjust the tension of the sanding belt 55, the operator rotates the handle at the upper end of the third threaded rod 561. Since the third threaded rod 561 is threadedly connected to the support plate 562, the rotation of the handle will drive the third threaded rod 561 to move axially in a straight line along the threaded hole of the support plate 562. The axial movement of the threaded rod can push or pull the U-shaped frame 564 to move synchronously. When the U-shaped frame 564 moves away from the sanding belt 55, the tension roller 566 squeezes the sanding belt 55 to increase the tension; conversely, the tension of the sanding belt 55 decreases.

[0030] Once the tension of the sanding belt 55 is adjusted to the correct position, the first shaft locking device 565 is used to lock the state. When locking, the clamping force can fix the relative position of the third threaded rod 561 and the U-shaped frame 564, preventing the third threaded rod 561 from rotating or shifting axially due to vibration during sanding operations, thereby avoiding changes in the tension of the sanding belt caused by the position displacement of the tension roller 566.

[0031] Please see Figure 5 The vertical frame 6 is equipped with a lifting mechanism 8 for adjusting the distance between the fixed plate 13 and the movable plate 7. The lifting mechanism 8 includes a second threaded rod 83, which is rotatably connected to the middle of the vertical frame 6. Sliding rods 85 are provided on opposite sides of the two sliding sleeves 15. The two ends of the sliding rods 85 are fixedly connected to the sliding sleeves 15 by supports. A lifting block 81 is threaded onto the second threaded rod 83, and the two ends of the lifting block 81 are slidably connected to the two sliding rods 85 respectively. Springs 82 are fitted onto the sliding rods 85 at the positions between the lifting block 81 and the lower supports of the sliding rods 85. A second shaft locking device 84 is provided at the lower end of the vertical frame 6 for locking the second threaded rod 83. A rotating shaft is fixedly connected to the lower end of the second threaded rod 83. The operator rotates the handle at the lower end of the second threaded rod 83 when it is necessary to adjust the distance between the fixed plate 13 and the movable plate 7. The rotation of the handle is converted into the linear movement of the lifting block 81 along the axis of the second threaded rod 83. The lifting movement of the lifting block 81 can drive the sliding sleeve 15 to move, thereby causing the movable plate 7 to move closer to or further away from the fixed plate 13 along the guide direction of the vertical frame 6. When they are closer, the distance is reduced, which is suitable for thin workpieces. When they are further away, the distance is increased, which is suitable for thick workpieces. Thus, the distance between the fixed plate 13 and the movable plate 7 can be adjusted accordingly according to the thickness of the workpiece. The spring 82 is used to make the sanding belt 55 on the movable plate 7 fit tightly against the surface of the workpiece, so as to avoid uneven sanding caused by the sanding belt 55 not fitting the workpiece during sanding.

[0032] After the distance between the fixed plate 13 and the movable plate 7 is adjusted to a position that matches the thickness of the workpiece, the state is locked by operating the second shaft locking device 84 at the lower end of the vertical frame 6. The second shaft locking device 84 can fix the position of the second threaded rod 83 by clamping force to prevent it from rotating due to equipment vibration during sanding operations, thereby avoiding the displacement of the lifting bar 81 and the resulting change in the distance.

[0033] Please see Figure 1 and 6Both sides of the base frame 1 are fixedly connected to supporting side frames 2. A ring track 10 is provided above one side of the base frame 1. Several inner support plates 11 are fixedly connected inside the ring track 10. The upper end of the supporting side frame 2 is fixedly connected to the inner support plate 11. Several roller slides 14 that match the ring track 10 are provided on the ring track 10. A drive assembly 3 for driving the roller slides 14 to rotate along the ring track 10 is provided inside the ring track 10. The drive assembly 3 includes a sprocket and chain transmission mechanism 33 adapted to the ring track 10. The sprocket and chain transmission mechanism 33 is installed on the inner support plate 11 inside the ring track 10. The side of the roller slides 14 closest to the chain is... A connector 32 is provided for connecting to the chain. A first reduction motor 31 for driving the sprocket to rotate is provided on the inner support plate 11 at one end of the annular track 10. When working, the first reduction motor 31 starts and the output torque directly drives the drive sprocket in the sprocket chain transmission mechanism 33 to rotate. Since the sprocket chain transmission mechanism 33 is installed inside the annular track 10 and is adapted to the trajectory of the annular track 10, the rotation of the drive sprocket will drive the chain to circulate along the internal trajectory of the annular track 10. The circulation of the chain will transmit traction force to the roller slide 14 through the connector 32, causing the roller slide 14 to slide synchronously along the trajectory of the annular track 10, forming a continuous power transmission.

[0034] Please see Figure 7 The base frame 1 has a loading platform 9 fixedly connected to one end by a bracket, and an inclined discharge hopper 12 fixedly connected to the end of the base frame 1 away from the loading platform 9. The roller slide 14 is provided with a pushing mechanism 4 for driving the workpiece through the sanding mechanism 5 to achieve double-sided grinding. The pushing mechanism 4 includes a sliding seat 41, which is fixedly connected to the upper end of the roller slide 14. A sliding plate 45 is slidably connected inside the sliding seat 41. Hole seats 4 are fixedly connected to both sides of the sliding plate 45 near the sanding mechanism 5. 8. The end of the sliding plate 45 is also provided with a workpiece placement frame 46. The workpiece placement frame 46 is provided with a threaded hole corresponding to the hole position of the hole seat 48. The hole position of the hole seat 48 is provided with a mounting screw 47 for fixing the workpiece placement frame 46 in conjunction with the threaded hole. The end of the sliding plate 45 away from the hole seat 48 is fixedly connected with a strip-shaped sliding frame 42. The roller slide block 14 is fixedly connected with two side plates 43 at the position below the strip-shaped sliding frame 42. The side plates 43 are provided with a reciprocating mechanism 44 for driving the sliding plate 45 to slide back and forth. During operation, the workpiece placement frame 46 can push the workpiece so that it can pass smoothly through the area of ​​the sanding belt 55 to complete the sanding work. At the same time, the workpiece placement frame 46 is fixed to the hole seat 48 with screws, which makes it easy to replace different workpiece placement frames 46 according to the shape and size of the workpiece, so as to meet the processing needs of various specifications of small workpieces.

[0035] When the roller slide 14 moves along the circular track 10 to the entrance of the sanding mechanism 5, the reciprocating mechanism 44 drives the strip slide frame 42 to move back and forth along the guide direction of the side plate 43. The strip slide frame 42 synchronously pulls the sliding plate 45 to slide smoothly in the sliding seat 41, thereby driving the workpiece placement frame 46 fixed at the end of the sliding plate 45 and the internal workpiece, so that when passing through the sanding area, it can move synchronously and repeatedly laterally. While improving the sanding effect of the workpiece, it can also disperse the wear area of ​​the sanding belt 55, improve the utilization rate of abrasive grains, and improve the service life of the sanding belt 55.

[0036] Meanwhile, when the workpiece placement frame 46 passes through the area of ​​the sanding belt 55, a certain gap is reserved between the workpiece placement frame 46 and the two sanding belts 55 to avoid the sanding belts 55 directly contacting the workpiece placement frame 46 and causing grinding.

[0037] Please see Figure 8 and Figure 10 The reciprocating mechanism 44 includes a pinion 443, which is rotatably connected to the middle of two side plates 43. A drive frame 445 is fixedly connected to the upper end of the pinion 443's connecting shaft. An adjusting block 446 is slidably connected within the drive frame 445. A shift post 447 is fixedly connected to the upper end of the adjusting block 446 and passes through a strip-shaped sliding frame 42. An adjusting assembly for adjusting the position of the adjusting block 446 is provided within the drive frame 445. A large gear 441 is also rotatably connected between one side of the side plates 43, meshing with the pinion 443. The lower end of the large gear 441's connecting shaft is fixedly connected to... A swing rod 442 is rotatably connected to an end roller 444 at its end. The support side frame 2 is provided with a matching track that cooperates with the end roller 444 to swing the swing rod 442. The matching track includes a track body 435, which is located near the annular track 10. The track body 435 has a support arm fixedly connected to the support side frame 2 inside. A limiting groove 437 is formed on the surface of the track body 435. The end roller 444 is located in the limiting groove 437. A wave groove 436 is provided at the upper end of the track body 435 at a position corresponding to the sanding belt 55. The two ends of the wave groove 436 are connected to the limiting groove 437.

[0038] When the roller slide 14 runs along the annular track 10, the end roller 444 at the end of the swing rod 442 in the reciprocating mechanism 44 always slides within the limiting groove 437 of the track body 435. As the roller slide 14 moves, the end roller 444 slides along the limiting groove 437. When it moves to the area corresponding to the sand belt 55, the end roller 444 enters the wave groove 436. The wave groove 436 causes the end roller 444 to shift left and right, thereby driving the swing rod 442 to reciprocate around the connecting shaft of the large gear 441. The swing of the swing rod 442 is transmitted to the small gear 443 through the transmission of the large gear 441. The rotation of the large gear 441 will drive the small gear 443 to rotate. At the same time, the large gear 441 has more teeth than the small gear 443, which can amplify the rotation angle of the small gear 443. The rotation of the small gear 443 is converted into the linear motion of the strip slide frame 42 through the drive frame 445 and the shift post 447, thereby driving the sliding plate 45 to slide back and forth.

[0039] Please see Figure 9 The adjusting assembly includes a first threaded rod 431, which is rotatably connected to the drive frame 445. The first threaded rod 431 is threadedly connected to the adjusting block 446. A rotating sleeve 432 is fixedly connected to one end of the drive frame 445. The rotating sleeve 432 is rotatably connected to the end shaft of the first threaded rod 431. A locking screw 434 for locking the first threaded rod 431 is threadedly connected to the rotating sleeve 432. A hexagonal block 433 is fixedly connected to one end of the first threaded rod 431 that protrudes from the rotating sleeve 432.

[0040] During adjustment, the operator uses a wrench to rotate the hexagonal block 433. The rotation of the hexagonal block 433 directly drives the first threaded rod 431 to rotate synchronously. The rotation of the first threaded rod 431 is converted into the linear movement of the adjusting block 446 along the length of the drive frame 445. When the adjusting block 446 moves to the desired position, tightening the locking screw 434 will cause its end to tightly abut against the end shaft surface of the first threaded rod 431, limiting the circumferential rotation of the first threaded rod 431 through friction. At the same time, because the first threaded rod 431 is threadedly connected to the adjusting block 446, after the position of the threaded rod is fixed, the adjusting block 446 can no longer move along the drive frame 445, preventing the position of the adjusting block 446 from shifting due to vibration when the reciprocating mechanism 44 is running, thus ensuring the stability of the stroke adjustment state. The position adjustment of the adjustment component directly affects the conveying stroke of the reciprocating mechanism 44. When the adjustment block 446 is close to the connecting shaft of the pinion 443, the eccentricity between the fixed upper end of the shift post 447 and the rotation center of the pinion 443 decreases. When the pinion 443 drives the drive frame 445 to make a circular motion, the linear reciprocating stroke of the shift post 447 driven by the strip slide frame 42 is shortened. When the adjustment block 446 is away from the connecting shaft of the pinion 443, the eccentricity of the shift post 447 increases, and the reciprocating stroke of the strip slide frame 42 is extended. Thus, it can be adjusted according to the size of the workpiece. The working principle of this invention is as follows: During operation, when the operator places the workpiece into the workpiece placement frame 46 as it passes the loading table 9, the workpiece placement frame 46 drags the workpiece toward the sanding belt 55, and the workpiece placement frame 46 containing the workpiece is transported to the sanding mechanism 5. When the roller slide 14 approaches the sanding mechanism 5, the end roller 444 of the swing rod 442 in the reciprocating mechanism 44 enters the wave groove 436 from the limiting groove 437 of the matching track. The wave groove 436 forces the end roller 444 to deflect, causing the swing rod 442 and the large gear 441 to swing, and the small gear 443 to rotate through gear meshing. The small gear 443 drives the drive frame 445 to perform corresponding rotational motion, and the shift column 447 slides in the strip slide frame 42, converting the circular motion into the reciprocating linear motion of the strip slide frame 42 and the sliding plate 45, and finally driving the workpiece in the workpiece placement frame 46 to move laterally back and forth and smoothly pass through the sanding area. At the same time, the second right-angle reduction motor 54 drives the transmission roller 51 to rotate, which in turn drives the upper and lower sanding belts 55 to rotate. The workpiece passes between the upper and lower sanding belts 55 under the traction of the workpiece placement frame 46, and both sides contact the sanding belts 55 at the same time to achieve synchronous double-sided sanding. When passing through the area of ​​the sanding belts 55, the shaking of the workpiece can avoid the single trajectory of the abrasive particles of the sanding belts 55, improve the uniformity of sanding, and at the same time disperse the wear of the sanding belts 55, extending their service life. After sanding is completed, the roller slide 14 continues to rotate along the circular track 10 to the discharge hopper 12 at the other end of the base frame 1. The finished workpiece in the workpiece placement frame 46 falls into the discharge hopper 12 under the action of gravity, completing the discharge. The empty roller slide 14 continues to circulate with the circular track 10, returning to the vicinity of the loading platform 9, waiting for the next batch of workpieces to be loaded.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Although this specification describes embodiments, not every embodiment contains only one technical solution. This method of description is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic double-sided sander, comprising a base frame (1), characterized in that, A vertical frame (6) is fixedly connected to one side of the base frame (1). A fixed plate (13) is fixedly connected to the lower end of the vertical frame (6). A movable plate (7) is provided above the fixed plate (13). Sliding sleeves (15) are fixedly connected to both sides of the movable plate (7). The sliding sleeves (15) are slidably connected to the vertical frame (6). A sanding mechanism (5) for grinding the two surfaces of the workpiece is provided on the fixed plate (13) and the movable plate (7). A lifting mechanism (8) for adjusting the distance between the fixed plate (13) and the movable plate (7) is provided on the vertical frame (6). Supporting side frames (2) are fixedly connected to both sides of the base frame (1). A ring track (10) is provided on one side above. Several inner support plates (11) are fixedly connected inside the ring track (10). The upper end of the support side frame (2) is fixedly connected to the inner support plates (11). Several roller slides (14) matching the ring track (10) are provided on the ring track (10). A drive assembly (3) for driving the roller slides (14) to run along the ring track (10) is provided inside the ring track (10). A loading platform (9) is fixedly connected to one end of the base frame (1) by a bracket. A pushing mechanism (4) for driving the workpiece to pass through the sanding mechanism (5) to achieve double-sided grinding is provided on the roller slides (14).

2. An automatic double-sided sander according to claim 1, characterized in that, The sanding mechanism (5) includes a transmission roller (51), which is rotatably connected to both ends of the movable plate (7) and the fixed plate (13). A sanding belt (55) is installed between the two transmission rollers (51) at the same horizontal height. A second right-angle reduction motor (54) is fixedly connected to the side of the movable plate (7) and the fixed plate (13) away from the transmission roller (51). The output shaft of the second right-angle reduction motor (54) is fixedly connected to the wheel axle of the transmission roller (51). L-shaped frames (52) are fixedly connected to both ends of the movable plate (7) and the fixed plate (13). The L-shaped frames (52) are rotatably connected to the wheel axle of the transmission roller (51) away from the inner support plate (53). A tensioning component (56) for adjusting the tension of the sanding belt (55) is provided on both the movable plate (7) and the fixed plate (13). An inner support plate (53) is fixedly connected to the opposite side of the movable plate (7) and the fixed plate (13).

3. An automatic double-sided sander according to claim 2, characterized in that, The tensioning assembly (56) includes two support plates (562), which are fixedly connected to the middle of the movable plate (7) and the fixed plate (13). Sliding rods (563) are slidably connected to both ends of the support plates (562). A U-shaped frame (564) is fixedly connected to the end of the sliding rods (563) near the sanding belt (55). A tensioning roller (566) is rotatably connected inside the U-shaped frame (564). A third threaded rod (561) is rotatably connected in the middle of the U-shaped frame (564). The third threaded rod (561) is threadedly connected to the support plates (562). A first shaft locking device (565) for locking the third threaded rod (561) is also provided on the U-shaped frame (564). A handle is fixedly connected to the upper end of the third threaded rod (561).

4. An automatic double-sided sander according to claim 1, characterized in that, The lifting mechanism (8) includes a second threaded rod (83), which is rotatably connected to the middle of the vertical frame (6). Each of the two sliding sleeves (15) has a sliding rod (85) on one side opposite to the other. The two ends of the sliding rod (85) are fixedly connected to the sliding sleeve (15) by supports. The second threaded rod (83) is threaded with a lifting block (81). The two ends of the lifting block (81) are slidably connected to the two sliding rods (85) respectively. The sliding rod (85) is fitted with a spring (82) at the position between the lifting block (81) and the lower end support of the sliding rod (85). The lower end of the vertical frame (6) is provided with a second shaft locking device (84) for locking the second threaded rod (83). The lower end of the second threaded rod (83) is fixedly connected with a rotating handle.

5. An automatic double-sided sander according to claim 1, characterized in that, The drive assembly (3) includes a sprocket and chain drive mechanism (33) adapted to the annular track (10). The sprocket and chain drive mechanism (33) is installed on the inner support plate (11) inside the annular track (10). Each roller slide (14) is provided with a connector (32) connected to the chain on the side near the chain. The inner support plate (11) at one end of the annular track (10) is provided with a first reduction motor (31) for driving the sprocket to rotate.

6. An automatic double-sided sander according to claim 1, characterized in that, The pushing mechanism (4) includes a sliding seat (41), which is fixedly connected to the upper end of the roller slide (14). A sliding plate (45) is slidably connected inside the sliding seat (41). Hole seats (48) are fixedly connected to both sides of the sliding plate (45) near the sanding mechanism (5). A workpiece placement frame (46) is also provided at the end of the sliding plate (45). A threaded hole corresponding to the hole position of the hole seat (48) is opened on the workpiece placement frame (46). An installation screw (47) for fixing the workpiece placement frame (46) is passed through the hole position of the hole seat (48). A strip slide frame (42) is fixedly connected to the end of the sliding plate (45) away from the hole seat (48). Two side plates (43) are fixedly connected to the roller slide (14) below the strip slide frame (42). A reciprocating mechanism (44) for driving the sliding plate (45) to slide back and forth is provided on the side plate (43).

7. An automatic double-sided sander according to claim 6, characterized in that, The reciprocating mechanism (44) includes a pinion (443), which is rotatably connected to the middle position of the two side plates (43). A drive frame (445) is fixedly connected to the upper end of the connecting shaft of the pinion (443). An adjusting block (446) is slidably connected inside the drive frame (445). A shift pin (447) is fixedly connected to the upper end of the adjusting block (446). The shift pin (447) passes through the strip slide frame (42). The drive frame (445) is provided with a mechanism for... The adjustment assembly for adjusting the position of the adjustment block (446) is also rotatably connected to one side of the side plate (43). The large gear (441) meshes with the small gear (443). The lower end of the connecting shaft of the large gear (441) is fixedly connected to a swing rod (442). The end of the swing rod (442) is rotatably connected to an end roller (444). The support side frame (2) is provided with a matching track that cooperates with the end roller (444) to make the swing rod (442) swing.

8. An automatic double-sided sander according to claim 7, characterized in that, The adjustment assembly includes a first threaded rod (431), which is rotatably connected to the drive frame (445). The first threaded rod (431) is threadedly connected to the adjustment block (446). A rotating sleeve (432) is fixedly connected to one end of the drive frame (445). The rotating sleeve (432) is rotatably connected to the end shaft of the first threaded rod (431). A locking screw (434) for locking the first threaded rod (431) is threadedly connected to the rotating sleeve (432). A hexagonal block (433) is fixedly connected to one end of the first threaded rod (431) that protrudes from the rotating sleeve (432).

9. An automatic double-sided sander according to claim 8, characterized in that, The matching track includes a track body (435), which is located near the circular track (10). The track body (435) has a support arm that is fixedly connected to the support side frame (2) inside. A limiting groove (437) is opened on the surface of the track body (435), and an end roller (444) is located in the limiting groove (437). A wave groove (436) is provided at the upper end of the track body (435) corresponding to the sand belt (55). The two ends of the wave groove (436) are connected to the limiting groove (437).

10. An automatic double-sided sander according to claim 1, characterized in that, The bottom frame (1) is fixedly connected to an inclined discharge hopper (12) at the end away from the loading platform (9).

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