Log turnover device for band saw

Abstract

The present application relates to the technical field of wood processing, and discloses a log overturning device for band sawing machine, which comprises a machine body, overturning assemblies for overturning logs on the machine body are arranged on both sides of the machine body, and the overturning assemblies comprise sliding modules, lifting modules, driving modules and limiting overturning modules. The first clamping jaw unit operates on the arc-shaped outer wall of the log, the second clamping jaw unit operates on the cutting surface of the log, and after the log is pressed and clamped and fixed by the two, the log can be supported, the log can be effectively prevented from falling due to center deviation during overturning by vertically supporting and fixedly clamping the two ends of the log, the first clamping jaw unit enlarges the area of contact with the arc-shaped wall of the log, and can form fixation within a certain arc-shaped range, and the operation of the second clamping jaw unit on the other side can effectively make the log be in a stable state during overturning.

Description

Technical Field

[0001] This invention belongs to the field of wood processing technology, and more specifically, relates to a log turning device for a band saw. Background Technology

[0002] When processing logs, multiple sides of the logs need to be processed, so a flipping mechanism is needed to flip the logs.

[0003] Patent CN221892140U discloses a log turning mechanism for a horizontal band saw, including a base plate. A mounting frame is installed at the top of the base plate, and support plates are installed on both sides of the top of the mounting frame. The output end of a first servo motor is connected to one end of a cylinder, and a clamping plate is installed at the output end of the cylinder. A lifting mechanism is located at the middle of the top of the base plate, and a placement plate is installed at the top of the lifting mechanism. Clamping mechanisms are installed on both sides inside the placement plate. By using the lifting mechanism located above the base plate, and through the interaction of the third servo motor, threaded rod, threaded sleeve, hinge rod, limit rod, limit sleeve, movable rod, and mounting cavity of the lifting mechanism, the log can be lifted.

[0004] The aforementioned existing patent involves lifting the bottom of the log, then clamping it with clamping plates that press and hold the log at both ends. Finally, the log is rotated and flipped by driving the clamping plates. While the clamping plates on both sides can hold and fix the entire log, the two clamping plates only provide axial compression. During the actual rotation and flipping process, the log's center of gravity may shift, causing the clamping plates to slip from the ends. Furthermore, relying solely on two clamping plates may result in excessive pressure on the ends of the log, potentially causing it to crack.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A log turning device for a band saw includes a machine body, and turning components for turning logs on the machine body are provided on both sides of the machine body. The turning components include a sliding module, a lifting module, a driving module and a limiting turning module. The sliding module includes sliding seats that are fixedly installed on the top walls of both sides of the machine body by bolts, and sliding blocks are slidably installed in the sliding seats; The lifting module includes a lifting base that is fixedly mounted on the top wall of the sliding block by bolts, a lifting upper seat is provided above the lifting base, and a second hydraulic cylinder is provided between the lifting upper seat and the lifting base. The drive module includes a third hydraulic cylinder fixedly installed on the wall of the lifting seat near the log. A connecting sleeve is fixedly installed on the piston end wall of the third hydraulic cylinder. Multiple sets of connecting plates are fixedly installed on the outer wall of the connecting sleeve. The end of the connecting plate away from the connecting sleeve is in an expanded state. The multiple sets of connecting plates are set together with the limit and flip module. The limiting and flipping module includes an outer cylinder, a flipping cylinder, a rotating unit, a first gripper unit, a second gripper unit, and a driving unit. The flipping cylinder is disposed inside the outer cylinder cavity, the rotating unit is disposed inside the outer cylinder, and the first gripper unit, the second gripper unit, and the driving unit are disposed on the flipping cylinder. The driving unit cooperates with the first gripper unit and the second gripper unit to limit the end of the log, and the rotating unit controls the log to rotate after being limited. The first gripper unit includes a connecting plate, a gripper arm plate, a side wing plate, a fifth hydraulic cylinder, and a gripper arm. The drive unit includes a drive seat. The connecting plate is fixedly connected to the drive seat. There are two sets of gripper arm plates and side wing plates. The gripper arm plate is arc-shaped. Two second lugs are fixedly installed on the side wall of the connecting plate away from the drive seat by bolts. One end of the gripper arm plate is rotatably connected to the second lugs by a pin. Each gripper arm plate is provided with multiple sets of gripper arms. Each gripper arm consists of two gripper arms and a fixing rod. Side arms are also fixedly installed on the horizontal cross-section of the clamping arm away from the log by bolts. A part of the side arm extends along the outside of the clamping arm away from the log, and the other part of the side arm is L-shaped. The L-shaped part of the side arm is located on the side of the corresponding clamping arm away from the log. A sixth hydraulic cylinder is fixedly installed on the free end of the L-shaped side arm. A clamping plate is fixedly installed on the piston end of the sixth hydraulic cylinder. Multiple sets of clamping rods are fixedly installed on the side wall of the clamping plate facing the log. The ends of the clamping rods are tapered.

[0007] In a preferred embodiment of the present invention, a sliding groove is provided on the top of the sliding seat, and a first hydraulic cylinder is fixedly installed on the inner wall of the sliding groove on the other side of the sliding seat cavity. The piston end of the first hydraulic cylinder is fixedly connected to one end of the sliding block. A second hydraulic cylinder is fixedly installed on the top wall of the lifting base, and the piston end of the second hydraulic cylinder is fixedly connected to the bottom wall of the lifting upper seat. A guide column is also fixedly installed on the top wall of the lifting base on both sides of the second hydraulic cylinder, and the guide column is movably sleeved with the lifting upper seat. A stabilizing sleeve is also fixedly installed on the front end shell of the third hydraulic cylinder, and multiple sets of stabilizing rods are fixedly installed between the stabilizing sleeve and the lifting upper seat.

[0008] In a preferred embodiment of the present invention, the connecting plates are arranged in a ring array. The outer cylinder and the other end of the multiple sets of connecting plates are fixed together by bolts. Both ends of the outer cylinder and the tilting cylinder are hollow. Both ends of the outer wall of the tilting cylinder are rotatably mounted with ring bodies through bearings. The two ring bodies are fixedly mounted with the inner wall of the outer cylinder. The rotating unit includes ring teeth fixedly fitted into the outer wall of the tilting cylinder. A first servo motor is fixedly mounted on the wall of one of the ring bodies through a bracket. The output end of the first servo motor is fixedly mounted with a drive gear through a shaft coupling. The drive gear meshes with the ring teeth.

[0009] In a preferred embodiment of the present invention, there are two drive units, which are respectively arranged together with the first gripper unit and the second gripper unit. Each drive unit includes a mounting plate, a connecting arm, a drive cover, and a second guide post. There are two connecting arms and two mounting plates. The two connecting arms are respectively fixedly installed on the outer walls of both sides of the drive cover. The drive cover is located outside the tilting cylinder. The mounting plate is arc-shaped and is fixedly connected to the connecting arm on the corresponding side. The mounting plate is fixedly installed on the outer wall of the tilting cylinder by bolts. The side wall of the drive cover near the tilting cylinder is rectangularly hollowed out. One end of the second guide post is movably disposed in the cavity of the drive cover. Guide grooves are provided on both sides of the symmetrical center of the tilting cylinder. The guide grooves penetrate the tilting cylinder, and the second guide post extends into the cavity of the tilting cylinder through the guide grooves.

[0010] In a preferred embodiment of the present invention, the drive unit further includes a second servo motor. The second servo motor is fixedly mounted on one side wall of the drive cover via a bracket. The output end of the second servo motor is fixedly connected to a lead screw via a second shaft coupling. The lead screw passes through one side wall of the drive cover and extends into the cavity of the drive cover. The other end of the lead screw is rotatably connected to the inner wall of the drive cover cavity. One end of the guide post two located inside the drive cover cavity has a threaded hole. The threaded hole of the guide post two is threadedly connected to the lead screw. One end of the guide post two slides within the cavity of the drive cover. Each guide groove is located outside... Limiting grooves are also provided on the side walls of the tilting cylinder. Limiting blocks are also fixedly installed on the two side walls corresponding to the positions of the guide post and the limiting groove. The limiting blocks are located in the limiting groove cavity. A stop shell is also installed on the outside of the limiting groove. The guide post passes through the stop shell. The stop shell is fixedly connected to the wall of the tilting cylinder by bolts. The limiting blocks are slidably installed between the stop shell and the wall of the limiting groove. A fourth hydraulic cylinder is also fixedly installed at the end of the guide post away from the drive cover. A drive seat is fixedly connected to the piston end of the fourth hydraulic cylinder. The drive seat is set together with the first gripper unit and the second gripper unit.

[0011] In a preferred embodiment of the present invention, the second gripper unit includes a gripper plate, which is a rectangular plate. The gripper plate is fixedly connected to the drive seat. Multiple sets of gripper grooves are formed on the side wall of the gripper plate away from the drive seat. The gripper grooves are conical.

[0012] In a preferred embodiment of the present invention, the side wing plate is fixedly installed on the side wall of the connecting plate near the drive seat by bolts. The side wing plate and the gripper arm plate are vertically corresponding. The side wing plate is L-shaped. A first ear seat is fixedly installed on the side wall of the side wing plate near the gripper arm plate by bolts. A rotating seat is rotatably installed on the first ear seat by a pin. One end of the fifth hydraulic cylinder is fixedly connected to the rotating seat. Ear plates are fixedly installed on the arc-shaped walls of both gripper arm plates. The ear plates are also arc-shaped and have multiple sets of ear canals. A rotating seat is also fixedly connected to the piston end of the fifth hydraulic cylinder. The other end of the rotating seat is rotatably connected to the ear canal by a pin.

[0013] In a preferred embodiment of the present invention, the fixing rod is fixed between two clamping arms. The clamping arms are arc-shaped, with one side of the clamping arm being a horizontal cross-section and the other side being an arc-shaped surface. The arc-shaped surface of the clamping arm faces the outer wall of the log. Each arc-shaped surface of the clamping arm has a concave clamping groove. The arc-shaped surface of the clamping arm on both sides of the clamping groove forms a conical surface. The fixing rod is fixedly connected to the clamping claw arm plate and forms a through connection. The clamping arms are located on both sides of the clamping claw arm plate.

[0014] Compared with the prior art, the present invention has the following advantages: 1. This technical solution utilizes a first gripper unit and a second gripper unit. The first gripper unit operates on the curved outer wall of the log, while the second gripper unit operates on the cut surface of the log. After applying pressure and clamping the log, they provide support. By vertically supporting and clamping both ends of the log, the problem of the log easily falling due to center shift during the flipping process can be effectively prevented. The first gripper unit expands the contact area with the curved wall of the log, forming a fixed position within a certain curved range. Combined with the operation of the second gripper unit on the other side, this effectively keeps the log stable during flipping. Furthermore, the cooperation of the first and second gripper units also avoids excessive force acting solely on the log wall, which could lead to the log being easily crushed or broken.

[0015] 2. This technical solution can achieve stable synchronous flipping of logs through the sliding module, lifting module, drive module, and limit flipping module. The sliding module can drive the limit flipping module to adjust its position on the machine body, avoiding motion interference between the band saw and the log during cutting. The lifting module can handle the flipping of logs of different sizes. The drive module can handle the flipping of logs of different lengths.

[0016] 3. This technical solution uses a drive unit to finely adjust the position of the first gripper unit and the second gripper unit. When the log is positioned between the two gripper units, the drive unit can control the first and second gripper units to move and adjust along the upper part of the log's outer wall, making it easy to adjust and select the fixed position with the log, and it is highly practical.

[0017] 4. This technical solution uses a rotating unit, a first gripper unit, and a second gripper unit. The first gripper unit presses and fixes the log against the arc-shaped outer wall, while the second gripper unit presses and fixes the log against the horizontal section after cutting. The two form a symmetrical pressing and fixing action. The gripper plate forms a surface pressing contact with the horizontal section of the log, and multiple sets of gripping arms on the two gripper arms make multi-level line contact with the arc-shaped outer wall of the log. Finally, they form an upper and lower cooperation pressing and fixing with the gripper plate, which can ensure the stability of clamping and fixing one end of the log.

[0018] 5. This technical solution allows the first gripper unit to contact the arc-shaped outer wall of the log, and the second gripper unit to contact the horizontal surface of the log after cutting. This is because the log needs to be flipped after each side is cut. The first gripper unit is always in contact with the uncut arc-shaped wall of the log, and the second gripper unit is in contact with the cut surface. The cooperation between the two forms a symmetrical clamping and fixing, which can greatly ensure the stability of the log when flipping.

[0019] 6. This technical solution, through the provision of a sixth hydraulic cylinder, clamping plate, and clamping rod, allows the second clamping unit to clamp and fix the horizontal cross-section of the log, and the first clamping unit to clamp and fix the arc-shaped outer wall of the log. Finally, the sixth hydraulic cylinder, clamping plate, and clamping rod can be used to clamp and fix the end face of the log, further ensuring the stability of the log fixation. The first and second clamping units form a symmetrical clamping and fixing mechanism, while the sixth hydraulic cylinder, clamping plate, and clamping rod clamp and fix the log from another direction. The cooperation with the first and second clamping units can form a multi-dimensional fixation.

[0020] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0021] In the attached diagram: Figure 1 This is a perspective view of the entire invention; Figure 2 This is a perspective view of the side of the flipping component of the present invention; Figure 3 This is a perspective view of the front of the flipping component of the present invention; Figure 4 This is a partial 3D perspective view of the limiting and flipping module of the present invention; Figure 5 This is a perspective view of the tilting cylinder and rotating unit of the present invention; Figure 6 This is a perspective view of the flipping cylinder, the first gripper unit, the second gripper unit, and the drive unit of the present invention. Figure 7 This is a perspective view of the first gripper unit, the second gripper unit, and the driving unit of the present invention; Figure 8 This is a perspective view of the flipping cylinder of the present invention; Figure 9 This is a perspective view of the second gripper unit and the drive unit of the present invention; Figure 10 This is a perspective view of the gripper plate of the present invention; Figure 11 This is a perspective view of the first gripper unit and the drive unit of the present invention; Figure 12 This is a perspective view of the first gripper unit and the drive unit of the present invention. Figure 13 This is a perspective view of the first gripper unit of the present invention. Figure 14 This is a bottom view of the first gripper unit of the present invention; Figure 15 This is a bottom view of the gripper arm of the present invention; Figure 16 This is a perspective view of the gripper arm of the present invention.

[0022] In the diagram: 10. Machine body; 11. Sliding seat; 12. Sliding groove; 13. Sliding block; 14. First hydraulic cylinder; 15. Lifting base; 16. Second hydraulic cylinder; 17. Guide column one; 18. Lifting upper seat; 19. Third hydraulic cylinder; 20. Stabilizing sleeve; 21. Stabilizing rod; 22. Connecting sleeve; 23. Connecting plate; 24. Outer cylinder; 25. Tilting cylinder; 26. Ring body; 27. Ring gear; 28. First servo motor; 29. ​​Drive gear; 30. Limiting groove; 31. Guide groove; 32. Stop shell; 33. Limiting block; 34. 35. Guide post 2; 36. Drive cover; 37. Connecting arm; 38. Mounting plate; 39. Second servo motor; 40. Lead screw; 41. Fourth hydraulic cylinder; 42. Drive seat; 43. Connecting plate; 44. Gripper plate; 45. Gripper groove; 46. Side wing plate; 47. First ear seat; 48. Rotating seat; 49. Fifth hydraulic cylinder; 50. Ear plate; 51. Gripper arm plate; 52. Ear canal; 53. Second ear seat; 54. Gripper groove; 55. Side arm; 57. Sixth hydraulic cylinder; 58. Gripper plate; 59. Gripper rod; 60. Fixing rod. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0024] A log turning device for a band saw, such as Figure 1 , Figure 2 As shown, the machine includes a body 10. Both sides of the body 10 are equipped with flipping components for flipping logs on the body 10. Each flipping component includes a sliding module, a lifting module, a drive module, and a limiting flipping module. A band saw (not shown in the figure) is also located on one side of the body 10. The bottom of the body 10 has pulleys that can move on guide rails. Logs are placed on two platforms on the body 10 and fixed to the platforms by clamps. The two platforms can move the logs using cylinders. The body 10 moves the logs closer to the band saw, enabling cutting. After each cut, the two platforms move the logs slightly outwards before the body 10 is driven to cut the logs again. The band saw and body 10 are existing technologies and will not be described in detail here.

[0025] like Figure 1 , Figure 2 , Figure 3 As shown, the sliding module includes a sliding seat 11 that is fixedly installed on the top walls of both sides of the machine body 10 by bolts. The top of the sliding seat 11 is provided with a sliding groove 12. One side of the sliding seat 11 and the log is hollow. A sliding block 13 is slidably installed in the sliding seat 11. A first hydraulic cylinder 14 is fixedly installed on the inner wall of the other side of the sliding groove 12 in the cavity of the sliding seat 11. The piston end of the first hydraulic cylinder 14 is fixedly connected to one end of the sliding block 13.

[0026] In use, the operator can control the position of the sliding block 13 in the sliding groove 12 through the first hydraulic cylinder 14. When the sliding block 13 is driven to move in the sliding groove 12, the sliding block 13 can drive the lifting module, the driving module and the limit flipping module to move as a whole. The overall movement can prevent the limit flipping module from getting close to the band saw when cutting the log. That is, when the log flipping device of this technical solution is not needed, the limit flipping module can be moved to the other side of the machine body 10. When the log needs to be flipped in place each time, the whole adjustment and movement can be moved out.

[0027] like Figure 2 , Figure 3As shown, the lifting module includes a lifting base 15 fixedly mounted on the top wall of the sliding block 13 by bolts. A lifting upper seat 18 is provided above the lifting base 15. A second hydraulic cylinder 16 is fixedly mounted on the top wall of the lifting base 15. The piston end of the second hydraulic cylinder 16 is fixedly connected to the bottom wall of the lifting upper seat 18. Guide columns 17 are also fixedly mounted on the top walls of the lifting base 15 on both sides of the second hydraulic cylinder 16. The guide columns 17 are movably sleeved with the lifting upper seat 18.

[0028] The lifting module is designed to accommodate logs of different sizes, volumes, and diameters. For logs with larger diameters, the height after being placed on the platform 10 of the machine body is relatively high. Therefore, the vertical height of the lifting seat 18 can be adjusted by controlling the operation of the second hydraulic cylinder 16, allowing the limit tilting module to be horizontally aligned with the log. The bottom sides of the lifting seat 18 have through holes corresponding to the positions of the guide posts 17. The guide posts 17 are inserted into the through holes to ensure the stability of the lifting seat 18 during height adjustment.

[0029] like Figure 2 , Figure 3 As shown, the drive module includes a third hydraulic cylinder 19 fixedly installed on the wall of the lifting seat 18 near the log. A stabilizing sleeve 20 is also fixedly installed on the front end shell of the third hydraulic cylinder 19. Multiple sets of stabilizing rods 21 for strengthening stability are also fixedly installed between the stabilizing sleeve 20 and the lifting seat 18. A connecting sleeve 22 is fixedly installed on the piston end wall of the third hydraulic cylinder 19. Multiple sets of connecting plates 23 are fixedly installed on the outer wall of the connecting sleeve 22. The end of the connecting plate 23 away from the connecting sleeve 22 is in an expanded state. The multiple sets of connecting plates 23 are set together with the limit and flip module.

[0030] The drive module is designed to accommodate logs of varying lengths. After the logs are placed on the two platforms of the machine body 10, both ends of the logs need to extend from the sides of the two platforms. This means that the minimum length of the logs must be longer than the distance between the two platforms. This design not only facilitates cutting the logs with a band saw but also makes it easier for the subsequent limit-flipping module to clamp and flip the logs. When encountering shorter logs, the operation of the third hydraulic cylinder 19 is controlled. The third hydraulic cylinder 19 drives the connecting sleeve 22, connecting plate 23, and limit-flipping module to move as a whole, approaching the logs and aligning one end of the logs with the limit-flipping module. Therefore, the drive module can accommodate the processing of logs of different lengths and is highly practical.

[0031] like Figure 2 , Figure 4 , Figure 5As shown, the limiting and flipping module includes an outer cylinder 24, a flipping cylinder 25, a rotating unit, a first gripper unit, a second gripper unit, and a driving unit. The flipping cylinder 25 is disposed inside the cavity of the outer cylinder 24, the rotating unit is disposed inside the outer cylinder 24, and the first gripper unit, the second gripper unit, and the driving unit are disposed on the flipping cylinder 25. The driving unit cooperates with the first gripper unit and the second gripper unit to limit the end of the log, and the rotating unit controls the log to rotate after being limited.

[0032] In use, when fine-tuning of the first and second gripper units is required, the drive unit can control the movement of the first and second gripper units to allow them to make better contact with the log. After the position is adjusted, the first and second gripper units approach the log until they make a certain hard contact with the log. The first and second gripper units are set up symmetrically, so one end of the log can be clamped and fixed by the first and second gripper units. Finally, by working with the rotation unit, the first and second gripper units and the clamped log are rotated and flipped, thereby realizing the in-situ flipping action of the log. The flipping angle can be controlled by the rotation unit.

[0033] like Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, the connecting plates 23 are arranged in a ring array. The outer cylinder 24 is fixedly installed to the other end of the multiple sets of connecting plates 23 by bolts. Both ends of the outer cylinder 24 and the tilting cylinder 25 are hollow. Both ends of the outer wall of the tilting cylinder 25 are rotatably mounted with ring bodies 26 through bearings. The two ring bodies 26 are fixedly installed to the inner wall of the outer cylinder 24. The rotating unit includes ring teeth 27 fixedly fitted into the outer wall of the tilting cylinder 25. A first servo motor 28 is fixedly mounted on the wall of one of the ring bodies 26 through a bracket. The output end of the first servo motor 28 is fixedly mounted with a drive gear 29 through a shaft coupling. The drive gear 29 meshes with the ring teeth 27. There are two drive units. The two drive units are respectively set together with the first gripper unit and the second gripper unit. The component includes a mounting plate 37, a connecting arm 36, a drive cover 35, and a second guide post 34. There are two connecting arms 36 and two mounting plates 37. The two connecting arms 36 are respectively fixedly installed on the outer walls of the two sides of the drive cover 35. The drive cover 35 is located outside the tilting cylinder 25. The mounting plate 37 is arc-shaped and is fixedly connected to the connecting arm 36 on the corresponding side. The mounting plate 37 is fixedly installed on the outer wall of the tilting cylinder 25 by bolts. The side wall of the drive cover 35 near the tilting cylinder 25 is rectangular and hollow. One end of the second guide post 34 is movably set in the cavity of the drive cover 35. Guide grooves 31 are opened on both sides of the symmetrical center of the tilting cylinder 25. The guide grooves 31 pass through the tilting cylinder 25, and the second guide post 34 extends into the cavity of the tilting cylinder 25 through the guide grooves 31.

[0034] like Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, the drive unit also includes a second servo motor 38, which is fixedly mounted on one side wall of the drive cover 35 via a bracket. The output end of the second servo motor 38 is fixedly connected to a lead screw 39 via a second coupling. The lead screw 39 penetrates one side wall of the drive cover 35 and extends into the cavity of the drive cover 35. The other end of the lead screw 39 is rotatably connected to the inner wall of the cavity of the drive cover 35. A guide post 34 has a threaded hole at one end located inside the cavity of the drive cover 35. The threaded hole of the guide post 34 is threadedly connected to the lead screw 39. One end of the guide post 34 slides within the cavity of the drive cover 35. The outer wall of the rotating cylinder 25 of each guide groove 31 also has… Each guide post 34 has a limiting groove 30. On the two side walls corresponding to the positions of the guide post 34 and the limiting groove 30, a limiting block 33 is fixedly installed. The limiting block 33 is located in the cavity of the limiting groove 30. A stop shell 32 is also assembled on the outside of the limiting groove 30. The guide post 34 passes through the stop shell 32. The stop shell 32 is fixedly connected to the wall of the tilting cylinder 25 by bolts. The limiting block 33 is slidably installed between the stop shell 32 and the wall of the limiting groove 30. A fourth hydraulic cylinder 40 is also fixedly installed at the end of the guide post 34 away from the drive cover 35. The piston end of the fourth hydraulic cylinder 40 is fixedly connected to the drive seat 41. The drive seat 41 is set together with the first gripper unit and the second gripper unit.

[0035] Specifically, one end of the log is aligned with the tilting cylinder 25. After the third hydraulic cylinder 19 operates, it pushes the tilting cylinder 25 closer to the end of the log, so that one end of the log extends into the cavity of the tilting cylinder 25. At this time, the operation of two second servo motors 38 can be controlled. The second servo motors 38 are forward and reverse rotating motors. When the second servo motors 38 are working, they can drive the lead screw 39 to rotate, and the guide column 34 can slide. The change in the operation of the guide column 34 can drive the first gripper unit and the second gripper unit to move. This allows for easy fine adjustment of the position of the first gripper unit and the second gripper unit, adjusting them to the end position of the log, which is convenient for subsequent clamping and fixing of the end of the log.

[0036] like Figure 9 , Figure 10 As shown, the second gripper unit includes a gripper plate 43, which is a rectangular plate. The gripper plate 43 is fixedly connected to the drive seat 41. Multiple sets of gripper grooves 44 are opened on the side wall of the gripper plate 43 away from the drive seat 41. The gripper grooves 44 are conical.

[0037] Furthermore, when the position of the gripper plate 43 is adjusted to be close to the end of the log, the surface of the gripper plate 43 corresponding to the log should be a horizontal cross-section after cutting. After the log is placed on the two sets of platforms of the machine body 10 and fixed, one side of the log is cut by the band saw. After the cutting is completed, one side of the log becomes a horizontal cross-section. After the first cut is completed, the log needs to be flipped in place. At this time, the log is flipped by the cooperation of the first gripper unit and the second gripper unit. Similarly, the working surface of the first gripper unit and the log should be an uncut arc surface; the first gripper unit and the second gripper unit... After the two gripper units work together to flip the log, the band saw is used to cut the other curved surface of the log. After the cutting is completed, the log becomes two horizontal sections. Then, the first and second gripper units work together to flip the log again. After the flipping is completed, the band saw cuts the other curved surface of the log. After the second cutting is completed, the three sides of the log become horizontal sections. Finally, the first and second gripper units work together to flip the remaining log again, and then the remaining curved surface is cut until the overall cutting of the log is completed.

[0038] When the gripper plate 43 approaches the horizontal section of the log, the working switch of the fourth hydraulic cylinder 40 is controlled. When the fourth hydraulic cylinder 40 is working, it can directly drive the gripper plate 43 to approach the horizontal section of the log until the claw groove 44 is inserted into the surface of the log. At this time, the gripper plate 43 achieves the effect of clamping and fixing the horizontal section of the log. The claw groove 44 can improve the friction between the gripper plate 43 and the log, ensuring the clamping and fixing ability.

[0039] like Figure 11 , Figure 12 , Figure 13 , Figure 14As shown, the first gripper unit includes a connecting plate 42, a gripper arm plate 50, a side wing plate 45, a fifth hydraulic cylinder 48, and a gripper arm. The connecting plate 42 is fixedly connected to the drive seat 41. There are two sets of gripper arm plates 50 and side wing plates 45. The gripper arm plate 50 is arc-shaped. Two second lugs 52 are bolted to the side wall of the connecting plate 42 away from the drive seat 41. One end of the gripper arm plate 50 is rotatably connected to the second lugs 52 by a pin. The side wing plates 45 are bolted to the side wall of the connecting plate 42 near the drive seat 41. The side wing plates 45 are vertically aligned with the gripper arm plates 50. The side wing plates 45 are L-shaped. A first ear seat 46 is bolted to one side wall of the gripper arm plate 50. The first gripper unit also includes a rotating seat 47, which includes a rotating seat one and a rotating seat two. The first ear seat 46 is rotatably mounted on the rotating seat one via a pin. One end of the fifth hydraulic cylinder 48 is fixedly connected to the rotating seat one. Ear plates 49 are fixedly mounted on the arc-shaped walls of both gripper arm plates 50. The ear plates 49 are also arc-shaped and have multiple sets of ear canals 51. The piston end of the fifth hydraulic cylinder 48 is also fixedly connected to the rotating seat two. The other end of the rotating seat two is rotatably connected to the ear canal 51 via a pin. Multiple sets of gripper arms are provided on each gripper arm plate 50. like Figure 15 , Figure 16 As shown, each gripper arm consists of two gripper arms 53 and a fixing rod 60. The fixing rod 60 is fixed between the two gripper arms 53. The gripper arm 53 is an arc-shaped body, with one side being a horizontal cross-section and the other side being an arc-shaped surface. The arc-shaped surface of the gripper arm 53 faces the outer wall of the log. Each arc-shaped surface of the gripper arm 53 has a concave clamping groove 54. The arc-shaped surface of the gripper arm 53 on both sides of the clamping groove 54 forms a conical surface. The fixing rod 60 is fixedly connected to the gripper arm plate 50 and forms a through connection. The gripper arms 53 are located on both sides of the gripper arm plate 50. Side arms 55 are bolted to the horizontal section of the clamping arm 53 at the end away from the log. A part of the side arm 55 extends along the outside of the clamping arm 53 towards the end away from the log, and the other part of the side arm 55 is L-shaped. The L-shaped part of the side arm 55 is located on the side of the corresponding clamping arm 53 away from the log. A sixth hydraulic cylinder 57 is fixedly installed on the free end of the L-shaped side arm 55. A clamping plate 58 is fixedly installed on the piston end of the sixth hydraulic cylinder 57. Multiple sets of clamping rods 59 are fixedly installed on the side wall of the clamping plate 58 facing the log. The ends of the clamping rods 59 are tapered.

[0040] Similarly, following the same operation, the position of the first gripper unit is fine-tuned. After the fine-tuning is completed, the operation of the fourth hydraulic cylinder 40 is controlled, causing the fourth hydraulic cylinder 40 to drive the connecting plate 42 to move. The connecting plate 42 then drives the lower gripper arm plate 50 and gripper arm 53 to approach the outer wall of the log. When multiple sets of gripper arms 53 approach and fit against the outer wall of the log, the operation of the two fifth hydraulic cylinders 48 is controlled, causing the fifth hydraulic cylinders 48 to drive the ear plate 49 and gripper arm plate 50 to rotate downwards, causing the two gripper arm plates 50 to move further closer to one side of the log. After the gripper arm plates 50 rotate and approach, the gripper arm plates 50 drive the gripper arm 53 to further press and contact the outer wall of the log. The conical surface formed on the clamping groove 54 can be inserted into the outer wall of the log to fix the log. Through the operation adjustment of the fifth hydraulic cylinder 48, the gripper arm plate 50 can adaptively rotate, which can also meet the needs of logs of different diameters to a certain extent.

[0041] After the two sets of gripper arms 50 flip to drive multiple sets of gripper arms 53 to clamp and fix the arc-shaped outer wall of the log, the operation of the sixth hydraulic cylinder 57 is then centrally controlled. When the sixth hydraulic cylinder 57 is working, it drives the clamping plate 58 to approach the end face of the log. After further driving, the conical part of the clamping rod 59 is inserted into the wall of the log, which can clamp and fix the end face of the log again.

[0042] Finally, the second gripper unit clamps and fixes the horizontal cross-section of the log, while the first gripper unit clamps and fixes the arc-shaped outer wall of the log. Simultaneously, the sixth hydraulic cylinder 57, clamping plate 58, and clamping rod 59 clamp and fix the end face of the log, ultimately achieving clamping and fixing of one end of the log. The second and first gripper units are arranged symmetrically, thus ensuring the stability of clamping and fixing one end of the log by clamping simultaneously from both above and below. The gripper plate 43 forms a surface compression contact with the horizontal cross-section of the log, and the multiple sets of clamping arms 53 on the two gripper arm plates 50 engage with the log... The arc-shaped outer wall makes multi-level line contact and forms an upper and lower cooperation squeezing fixation with the claw plate 43 to ensure the stability of one end of the log. Following the same operation method, the other end of the log also needs to be operated in the same way. After the two ends of the log are fixed, the operation of the two first servo motors 28 is centrally controlled. When the first servo motors 28 are working, the first servo motors 28 drive the drive gear 29 to rotate. The drive gear 29 then drives the ring gear 27 to rotate. The ring gear 27 drives the flipping cylinder 25 to rotate. After the two flipping cylinders 25 rotate synchronously in the same direction, the log can be flipped in place.

[0043] It is worth noting that the operation of the two primary servo motors 28 can be controlled by a centralized controller (such as Siemens S7-1500, Omron NJ series, etc.) through a unified command source. The centralized controller is existing technology and will not be elaborated upon here. It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A log turning device for a band saw, comprising a body (10), wherein both sides of the body (10) are provided with turning components for turning logs on the body (10), characterized in that, The flipping assembly includes a sliding module, a lifting module, a driving module, and a limiting flipping module; The sliding module includes a sliding seat (11) that is fixedly installed on the top walls on both sides of the body (10) by bolts, and a sliding block (13) is slidably installed in the sliding seat (11). The lifting module includes a lifting base (15) that is fixedly installed on the top wall of the sliding block (13) by bolts. A lifting upper seat (18) is provided above the lifting base (15). A second hydraulic cylinder (16) is provided between the lifting upper seat (18) and the lifting base (15). The drive module includes a third hydraulic cylinder (19) fixedly installed on the wall of the lifting seat (18) near the end of the log. A connecting sleeve (22) is fixedly installed on the piston end wall of the third hydraulic cylinder (19). Multiple sets of connecting plates (23) are fixedly installed on the outer wall of the connecting sleeve (22). The end of the connecting plate (23) away from the connecting sleeve (22) is in an expanded state. The multiple sets of connecting plates (23) are set together with the limit flipping module. The limiting and flipping module includes an outer cylinder (24), a flipping cylinder (25), a rotating unit, a first gripper unit, a second gripper unit, and a driving unit. The flipping cylinder (25) is located inside the cavity of the outer cylinder (24), the rotating unit is located inside the outer cylinder (24), and the first gripper unit, the second gripper unit, and the driving unit are located on the flipping cylinder (25). The driving unit, in cooperation with the first gripper unit and the second gripper unit, limits the end of the log. The rotating unit controls the log to rotate after being limited. The first gripper unit includes a connecting plate (42), a gripper arm plate (50), a side wing plate (45), a fifth hydraulic cylinder (48), and a gripper arm. The drive unit includes a drive seat (41). The connecting plate (42) is fixedly connected to the drive seat (41). There are two sets of gripper arm plates (50) and side wing plates (45). The gripper arm plate (50) is arc-shaped. Two second ear seats (52) are fixedly installed on the side wall of the connecting plate (42) away from the drive seat (41) by bolts. One end of the gripper arm plate (50) is rotatably connected to the second ear seat (52) by a pin. Each gripper arm plate (50) is provided with multiple sets of gripper arms. Each gripper arm consists of two gripper arms (53) and a fixed rod (60). Side arms (55) are also fixedly installed on the horizontal section of the clamping arm (53) away from the log by bolts. A part of the side arm (55) extends along the outside of the clamping arm (53) to the end away from the log. The other part of the side arm (55) is L-shaped. The L-shaped part of the side arm (55) is located on the side of the corresponding clamping arm (53) away from the log. A sixth hydraulic cylinder (57) is fixedly installed on the free end of the L-shaped side arm (55). A clamping plate (58) is fixedly installed on the piston end of the sixth hydraulic cylinder (57). Multiple sets of clamping rods (59) are fixedly installed on the side wall of the clamping plate (58) facing the log. The ends of the clamping rods (59) are tapered.

2. The log turning device for a band saw according to claim 1, characterized in that, The top of the sliding seat (11) is provided with a sliding groove (12). A first hydraulic cylinder (14) is fixedly installed on the inner wall of the sliding groove (12) on the other side of the cavity of the sliding seat (11). The piston end of the first hydraulic cylinder (14) is fixedly connected to one end of the sliding block (13). The second hydraulic cylinder (16) is fixedly installed on the top wall of the lifting base (15). The piston end of the second hydraulic cylinder (16) is fixedly connected to the bottom wall of the lifting upper seat (18). Guide columns (17) are also fixedly installed on the top walls of the lifting base (15) on both sides of the second hydraulic cylinder (16). The guide columns (17) are movably connected to the lifting upper seat (18). A stabilizing sleeve (20) is also fixedly installed on the front end shell of the third hydraulic cylinder (19). Multiple sets of stabilizing rods (21) are also fixedly installed between the stabilizing sleeve (20) and the lifting upper seat (18).

3. The log turning device for a band saw according to claim 1, characterized in that, The connecting plates (23) are arranged in a ring array. The outer cylinder (24) and the other end of the multiple connecting plates (23) are fixed together by bolts. Both ends of the outer cylinder (24) and the flipping cylinder (25) are hollow. Both ends of the outer wall of the flipping cylinder (25) are rotatably mounted with ring bodies (26) through bearings. The two ring bodies (26) are fixedly mounted with the inner wall of the outer cylinder (24). The rotating unit includes ring teeth (27) fixedly fitted on the outer wall of the flipping cylinder (25). A first servo motor (28) is fixedly mounted on the wall of one of the ring bodies (26) through a bracket. The output end of the first servo motor (28) is fixedly mounted with a drive gear (29) through a shaft coupling. The drive gear (29) meshes with the ring teeth (27).

4. The log turning device for a band saw according to claim 3, characterized in that, The number of drive units is two, and the two drive units are respectively set together with the first gripper unit and the second gripper unit. The drive unit includes a mounting plate (37), a connecting arm (36), a drive cover (35), and a guide post (34). The number of connecting arms (36) and the number of mounting plates (37) are both two. The two connecting arms (36) are respectively fixedly installed on the outer walls of the two sides of the drive cover (35). The drive cover (35) is located outside the tilting cylinder (25). The mounting plate (37) is arc-shaped, and the mounting plate (37) is connected to the corresponding side of the drive cover (35). The connecting arm (36) is fixedly connected, and the mounting plate (37) is fixedly installed on the outer wall of the rotating cylinder (25) by bolts. The side wall of the drive cover (35) near the rotating cylinder (25) is rectangularly hollowed out. One end of the guide post (34) is movably set in the cavity of the drive cover (35). Guide grooves (31) are opened on both sides of the center symmetrical position of the rotating cylinder (25). The guide grooves (31) pass through the rotating cylinder (25), and the guide post (34) extends into the cavity of the rotating cylinder (25) through the guide grooves (31).

5. The log turning device for a band saw according to claim 4, characterized in that, The drive unit also includes a second servo motor (38), which is fixedly mounted on one side wall of the drive cover (35) by a bracket. The output end of the second servo motor (38) is fixedly connected to a lead screw (39) through a coupling. The lead screw (39) passes through one side wall of the drive cover (35) and extends into the cavity of the drive cover (35). The other end of the lead screw (39) is rotatably connected to the inner wall of the cavity of the drive cover (35). One end of the guide post (34) located in the cavity of the drive cover (35) is provided with a screw hole. The screw hole of the guide post (34) is threadedly connected to the lead screw (39). One end of the guide post (34) slides within the cavity of the drive cover (35). The wall of the flipping cylinder (25) outside each guide groove (31) is also provided with... A limiting groove (30) is provided. On the two side walls corresponding to the positions of the guide post (34) and the limiting groove (30), a limiting block (33) is fixedly installed. The limiting block (33) is located in the cavity of the limiting groove (30). A stop shell (32) is also assembled on the outside of the limiting groove (30). The guide post (34) passes through the stop shell (32). The stop shell (32) is fixedly connected to the wall of the flipping cylinder (25) by bolts. The limiting block (33) is slidably installed between the stop shell (32) and the wall of the limiting groove (30). A fourth hydraulic cylinder (40) is fixedly installed at the end of the guide post (34) away from the drive cover (35). A drive seat (41) is fixedly connected to the piston end of the fourth hydraulic cylinder (40). The drive seat (41) is set together with the first gripper unit and the second gripper unit.

6. The log turning device for a band saw according to claim 5, characterized in that, The second gripper unit includes a gripper plate (43), which is a rectangular plate. The gripper plate (43) is fixedly connected to the drive seat (41). Multiple sets of gripper grooves (44) are opened on the side wall of the gripper plate (43) away from the drive seat (41). The gripper grooves (44) are conical.

7. The log turning device for a band saw according to claim 1, characterized in that, The side wing plate (45) is fixedly installed on the side wall of the connecting plate (42) near the drive seat (41) by bolts. The side wing plate (45) and the gripper arm plate (50) are vertically aligned. The side wing plate (45) is L-shaped. The side wall of the side wing plate (45) near the gripper arm plate (50) is fixedly installed with bolts. The first ear seat (46) is rotatably installed with a rotating seat one by a pin. One end of the fifth hydraulic cylinder (48) is fixedly connected to the rotating seat one. Ear plates (49) are fixedly installed on the arc-shaped walls of the two gripper arm plates (50). The ear plates (49) are also arc-shaped. Multiple ear canals (51) are provided on the ear plates (49). The piston end of the fifth hydraulic cylinder (48) is fixedly connected to the rotating seat two. The other end of the rotating seat two is rotatably connected to the ear canal (51) by a pin.

8. The log turning device for a band saw according to claim 1, characterized in that, The fixing rod (60) is fixed between two clamping arms (53). The clamping arms (53) are arc-shaped. One side of the clamping arm (53) is a horizontal cross-section, and the other side of the clamping arm (53) is an arc-shaped surface. The arc-shaped surface of the clamping arm (53) faces the outer wall of the log. The arc-shaped surface of the clamping arm (53) is provided with concave clamping grooves (54). The arc-shaped surface of the clamping arm (53) on both sides of the clamping groove (54) forms a conical surface. The fixing rod (60) is fixedly connected to the claw arm plate (50) and forms a through connection. The clamping arm (53) is located on both sides of the claw arm plate (50).

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