Driving roller assembly of rotary cutter

Abstract

The utility model discloses a rotary cutter driving roller assembly which comprises a driving shaft rotationally connected to a machine frame of a rotary cutter, a first driving ring arranged on the driving shaft in a sleeving mode and used for driving a cut log to rotate and a friction ring arranged on one side of the first driving ring. The friction ring is rotationally connected with the driving shaft, the friction ring is static relative to the rack, and the outer diameter of the friction ring is smaller than that of the first driving ring. The driving shaft rotates to drive the round timber to rotate, and when small protrusions are locally arranged on the outer circle of the round timber, the small protrusions can slide relative to the friction ring which does not rotate along with the driving shaft, so that mutual friction is achieved. When the cutter is used for cutting the round timber, the friction ring not only extrudes the protrusions, but also has a scraping effect, so that the small protrusions of the round timber are scraped to be flat, the round timber is closer to a perfect circle, a veneer strip cut by the cutter is smoother, the thickness deviation is smaller, and the smoothness, flatness and uniformity of the produced veneer strip can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of wood processing machinery, in particular to a driving roller assembly of a veneer lathe. Background Art

[0002] A veneer lathe is a common machine in woodworking board production, which is used to process round logs with a certain length and diameter into continuous veneer belts for subsequent production of plywood or other boards, or for other uses of artificial board veneering.

[0003] The veneer lathe clamps the round log through three rollers, and then the three rollers drive the round log to rotate. The long strip-shaped cutter cuts on the surface of the round log to form a continuous veneer belt. One of the three rollers is a single-row roller, and the other two are double-row rollers. The single-row roller is driven to rotate by a motor and drives the round log to rotate through friction.

[0004] After the round log is cut into sections and peeled, large protrusions and scars on the surface are removed to form a round log. The surface of the round log is not a smooth arc surface and there will be some small protrusions. If the current veneer lathe is used for cutting, the thickness deviation of the cut veneer belt will be very large and the surface will be uneven, especially the first few layers of the cut veneer belt will be particularly obvious. These layers of veneer belts are usually treated as waste, resulting in waste.

[0005] Therefore, the protruded parts of the round log are cut by the cutter, which will form protrusions on the veneer belt, resulting in a locally thickened veneer belt, a large thickness deviation of the veneer belt, affecting the flatness and uniformity of the veneer belt, and then affecting the product quality of the subsequent board. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to provide a driving roller assembly of a veneer lathe, which is used to solve the problem that the veneer belt cut by the current veneer lathe is locally thickened due to the influence of the protrusions on the surface of the round log, resulting in an excessive thickness deviation of the veneer belt.

[0007] To solve the above technical problem, the technical solution adopted by the utility model is:

[0008] A driving roller assembly of a veneer lathe, including a driving shaft rotatably connected to the frame of the veneer lathe, a first driving ring sleeved on the driving shaft for driving the round log to be cut to rotate, and a scraping member arranged on one side of the first driving ring. The first driving ring rotates with the driving shaft, the scraping member is stationary relative to the frame, and the distance between the surface of the scraping member in contact with the round log and the axis of the driving shaft is less than the radius of the first driving ring.

[0009] Furthermore, the scraping member is a friction ring sleeved on the driving shaft, and the friction ring is rotatably connected to the driving shaft.

[0010] Further, there is one scraping member, and the first driving ring is one disposed on one side of the scraping member or two respectively disposed on both sides of the scraping member.

[0011] Further, a second driving ring that can rotate with the driving shaft is provided on one side of the first driving ring or on the outer circle of the first driving ring. The second driving ring is coaxial with the first driving ring, and teeth are provided on the circumference of the second driving ring, and the teeth are higher than the surface of the first driving ring.

[0012] Further, at least one pit is provided on the circumference of the friction ring, and a limiting unit is detachably connected to the frame, and the limiting unit abuts against the pit.

[0013] Further, the limiting unit includes a mounting plate detachably connected to the frame and a blocking block sandwiched between the mounting plate and the friction ring. The blocking block abuts against the pit, and a groove for allowing the first driving ring to pass through is provided on the surface of the blocking block close to the driving shaft.

[0014] Further, the surface of the pit close to the center of the friction ring is a plane, and the distance between this plane and the center of the friction ring is less than the diameter of the friction ring, and the limiting unit abuts against this plane.

[0015] Further, a support block is fixedly connected to the frame, the support block abuts against the friction ring, and a key for preventing the friction ring from rotating is provided between the friction ring and the support block.

[0016] Further, an inner ring that can rotate with the driving shaft is sleeved on the driving shaft at the position where the friction ring is located. The friction ring is sleeved outside the inner ring. Ball bearings are provided between the friction ring and the inner ring. The end face of the inner ring abuts against the end face of the first driving ring, and the two end faces of the inner ring are respectively higher than the corresponding end faces of the friction ring.

[0017] Further, the first driving rings and the friction rings are alternately arranged. Knurling is provided on the surface of the first driving ring. Key grooves are provided on the driving shaft along the radial direction. Protrusions for cooperating with the key grooves are provided in the inner holes of the first driving rings.

[0018] The positive effects of the present utility model are:

[0019] 1. The utility model is provided with a driving shaft, on which a first driving ring and a friction ring are arranged. When the driving shaft rotates, it drives the first driving ring to rotate, and then drives the round log to rotate. When there are small protrusions on the outer circle of the round log, relative sliding will occur with the friction ring that does not rotate with the driving shaft, thus generating relative friction. The friction ring not only squeezes these protrusions, but also has a scraping effect during the friction with the surface of the round log, thereby scraping flat these small protrusions on the round log, making the cross-sectional shape of the round log closer to a perfect circle, so that the veneer belt cut by the cutter is smoother, with a smaller thickness deviation, and the smoothness, flatness and uniformity of the produced veneer belt can be ensured.

[0020] 2. A second driving ring is also arranged on one side of the first driving ring. Tooth presses are arranged on the outer circle of the second driving ring. When the second driving ring rotates with the driving shaft, the teeth penetrate into the surface of the round log, damaging the wood fibers, reducing the internal stress of the veneer belt cut by the cutter, and making the veneer belt lie flat after being cut into single pieces, avoiding the phenomenon of curling of the produced veneer belt and affecting the subsequent stacking. Description of the Drawings

[0021] Figure 1 is a schematic connection diagram of the utility model and the frame;

[0022] Figure 2 is Figure 1 exploded view of;

[0023] Figure 3 is a cross-sectional view of the utility model;

[0024] Figure 4 is a schematic connection diagram of the first driving ring, the second driving ring, the friction ring and the driving shaft;

[0025] Figure 5 is a three-dimensional view of the second driving ring;

[0026] Figure 6 is a schematic diagram after the driving ring is separated from the limiting unit;

[0027] Figure 7 is a schematic diagram after the driving ring is combined with the limiting unit;

[0028] Figure 8 is a schematic working diagram of the utility model;

[0029] In the figure:

[0030] 1. Bearing body; 2. Scraping member; 3. First driving ring; 4. Second driving ring; 5. Support block; 6. Mounting plate; 7. Driving shaft; 8. Blocking block; 9. Friction ring; 10. Ball; 11. Inner ring; 12. Protrusion; 13. Pit; 14. Round log; 15. Driven roller; 16. Cutter; 17. Veneer belt; 18. Frame. Detailed implementation mode

[0031] Embodiment 1

[0032] As Figure 1 shown, a driving roller assembly of a veneer peeling machine includes a driving shaft 7 rotatably connected to the frame 18 of the veneer peeling machine, a first driving ring 3 sleeved on the driving shaft 7 for driving the log 14 to be cut to rotate, and a squeezing and scraping member 2 arranged on one side of the first driving ring 3. The surface of the first driving ring 3 is provided with knurling for increasing the friction force. The first driving ring 3 rotates with the driving shaft 7, the squeezing and scraping member 2 is stationary relative to the frame 18, and the distance between the surface of the squeezing and scraping member 2 in contact with the log 14 and the axis of the driving shaft 7 is less than the radius of the first driving ring 3.

[0033] In this embodiment, the squeezing and scraping member 2 can be an arc-shaped metal sheet or metal block or an annular friction ring 9, and the squeezing and scraping member 2 is connected to the frame 18. There is one squeezing and scraping member 2, the first driving ring 3 is one arranged on one side of the squeezing and scraping member 2, and the length of the squeezing and scraping member 2 is much greater than that of the first driving ring 3.

[0034] Combined with Figure 8 shown, the log 14 is clamped between the first driving ring 3 and two driven rollers 15. The first driving ring 3 drives the log 14 to rotate clockwise through friction, and is cut into a veneer strip 17 by a cutter 16 below the first driving ring 3.

[0035] When there are local small protrusions on the outer circle of the log 14, relative sliding will occur with the squeezing and scraping member 2 that does not rotate with the driving shaft 7. Since the log 14 contains a certain amount of moisture and its wood has a certain plasticity, the friction ring 9 will not only squeeze these small protrusions, but also scrape these small protrusions, thereby scraping the small protrusions of the log 14 flat, making the veneer strip 17 cut by the cutter 16 smoother, with smaller thickness deviation, and further ensuring the smoothness, flatness and uniformity of the produced veneer strip 17. At the same time, the utilization rate of the log 14 can be improved and waste can be reduced.

[0036] If only one first driving ring 3 is provided, the log 14 is likely to slip. First driving rings 3 can be arranged on both sides of the squeezing and scraping member 2 to increase the driving force, and at the same time, the log 14 can also be driven by the driving force near both ends, making the force on the log 14 more balanced.

[0037] Embodiment 2

[0038] As Figures 1 to 7 shown, the difference between this embodiment and Embodiment 1 is that:

[0039] The scraping member 2 is a friction ring 9 sleeved on the drive shaft 7. There are 27 friction rings 9 and first drive rings 3 each. The first drive rings 3 and the friction rings 9 are arranged alternately along the axial direction of the drive shaft 7. Bearing bodies 1 are fixedly arranged on the frame 18 at positions corresponding to both ends of the drive shaft 7. The parts of the drive shaft 7 near both ends are rotatably connected to the frame 18 through the corresponding bearing bodies 1 respectively. Sprockets are fixedly arranged at both ends of the drive shaft 7.

[0040] An inner ring 11 is sleeved on the drive shaft 7 at the position where the friction ring 9 is located. The friction ring 9 is sleeved outside the inner ring 11. The inner ring 11 and the drive shaft 7 are key-connected, so that the drive shaft 7 drives the inner ring 11 to rotate. Ball bearings 10 are arranged between the friction ring 9 and the inner ring 11. The end face of the inner ring 11 abuts against the end face of the first drive ring 3. The two end faces of the inner ring 11 are respectively 0.5 mm higher than the corresponding end faces of the friction ring 9, so as to ensure that there is a gap between the friction ring 9 and the first drive ring 3 and avoid wear caused by mutual friction. After the friction ring 9, the inner ring 11 and the ball bearings 10 are combined together, they have the same structure as a ball bearing. In actual production, the production cost can be reduced by adopting the method of specifying a special bearing from a bearing factory.

[0041] Key grooves are arranged on the drive shaft 7 along the radial direction. Protrusions 12 for cooperating with the key grooves are arranged in the inner holes of the first drive rings 3. Therefore, when the drive shaft 7 rotates, the first drive rings 3 are driven to rotate through the protrusions 12.

[0042] The first drive rings 3 rotate with the drive shaft 7. The friction rings 9 are all rotatably connected to the drive shaft 7. The friction rings 9 are all stationary relative to the frame 18. The outer diameter of the friction ring 9 is 1 mm smaller than the outer diameter of the first drive ring 3.

[0043] Limiting units are detachably connected to the frame 18 by bolts. There are four limiting units arranged at intervals along the axial direction of the drive shaft 7. Each limiting unit corresponds to six friction rings 9. Three pits 13 are arranged on the circumference of the friction rings 9 corresponding to the limiting units. The three pits 13 are arranged at intervals of 30 degrees along the circumferential direction of the friction ring 9. The limiting units respectively abut against the pits 13 of the corresponding friction rings 9.

[0044] Three support blocks 5 are fixedly connected to the frame 18 by bolts. The three support blocks 5 are respectively arranged between adjacent limiting units. The three support blocks 5 respectively correspond to three friction rings 9. The support blocks 5 abut against the outer circles of the corresponding friction rings 9. One side of the support block 5 close to the friction ring 9 is C-shaped. Key grooves are arranged on one side of the support block 5 close to the friction ring 9 and on the outer circle of the corresponding friction ring 9. Keys are inserted into the key grooves to prevent the friction ring 9 from rotating with the transmission shaft 7.

[0045] The log 14 is clamped between the first driving ring 3 and the two driven rollers 15. The motor-driven chain drives the transmission shaft 7 to rotate through the sprocket, and then drives the first driving ring 3 to rotate, thereby driving the log 14 to rotate. Both the friction ring 9 and the first driving ring 3 are provided with 27 pieces and are arranged alternately. On the premise of ensuring the scraping effect on the small protrusions on the surface of the log 14, there can also be sufficient driving force to drive the log 14 to rotate and prevent the log 14 from slipping.

[0046] Embodiment 3

[0047] The difference between this embodiment and Embodiment 2 is that:

[0048] A second driving ring 4 that can rotate with the driving shaft 7 is provided on one side of the first driving ring 3. The second driving ring 4 is clamped between the first driving ring 3 and the corresponding friction ring 9, and the second driving ring 4 is coaxial with the first driving ring 3. A protrusion 12 inserted into the keyway on the driving shaft 7 is also provided on the inner circle of the second driving ring 4, so that the second driving ring 4 rotates with the driving shaft 7. Tooth teeth are provided on the circumference of the second driving ring 4, and the tooth teeth are 0.5 to 1 mm higher than the surface of the first driving ring 3, and this dimension is smaller than the thickness of the veneer belt 17.

[0049] When the driving shaft 7 rotates, it drives the second driving ring 4 to rotate. The tooth teeth on the second driving ring 4 are inserted into the log 14, so as to increase the driving force on the log 14 and prevent the first driving ring 3 from slipping on the log 14.

[0050] In addition, after the tooth teeth are inserted into the log 14, the wood fibers are damaged, the internal stress of the produced veneer belt 17 is reduced, and the phenomenon of the produced veneer belt 17 curling is avoided.

[0051] Embodiment 4

[0052] The difference between this embodiment and Embodiment 3 is that:

[0053] The limiting unit includes a mounting plate 6 detachably connected to the frame 18 by bolts and a rectangular blocking block 8 clamped between the mounting plate 6 and the friction ring 9. The blocking block 8 is fixedly connected to the mounting plate 6. The blocking block 8 abuts against the concave pit 13, and a groove for the first driving ring 3 and the second driving ring 3 to pass through is provided on the surface of the blocking block 8 close to the driving shaft 7.

[0054] One side of the concave pit 13 close to the center of the friction ring 9 is a plane, and the distance from this plane to the center of the friction ring 9 is less than the diameter of the friction ring 9. The surface of the blocking block 8 close to the friction ring 9 abuts against this plane.

[0055] After the veneer peeling machine has worked for a period of time, the surface of the friction ring 9 will be worn due to friction with the log 14. Stop the veneer peeling machine, remove the bolts on the mounting plate 6, move the mounting plate 6 upward to disengage the blocking block 8 from the pit 13, then rotate the friction ring 9 to rotate the next pit 13 to the position where the previous pit 13 was located, and then re-insert the blocking block 8 into the pit and tighten the bolts.

[0056] Therefore, by the cooperation of the blocking block 8 and different pits 13, the outer edge of the friction ring 9 can be fully utilized, the service life of the friction ring 9 can be extended, and there is no need to remove the drive shaft 7 when adjusting the position of the friction ring 9.

[0057] The above-described embodiments are described in more detail and specifically, expressing the preferred embodiments of the present invention. They are only used to illustrate the technical ideas and features of the present invention. The purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, it is not limited to the present invention alone. The patent scope of the present invention cannot be limited only by this embodiment. That is, any equivalent changes or modifications made in accordance with the spirit disclosed by the present invention, for researchers or technicians in the field, within the structure of the present invention, local improvements within the system and changes and transformations between subsystems are still within the patent scope of the present invention.

Claims

1. A rotary cutter driving roller assembly, characterized in that: The invention comprises a driving shaft (7) rotatably connected to a frame (18) of a peeling machine, a first driving ring (3) sleeved on the driving shaft (7) and used for driving a log (14) to be cut to rotate, and a scraping member (2) arranged on one side of the first driving ring (3), wherein the first driving ring (3) rotates with the driving shaft (7), the scraping member (2) is stationary relative to the frame (18), and the distance between the surface of the scraping member (2) in contact with the log (14) and the axis of the driving shaft (7) is smaller than the radius of the first driving ring (3).

2. The driving roller assembly of a rotary cutter according to claim 1, characterized in that: The scraping member (2) is a friction ring (9) sleeved on the driving shaft (7), and the friction ring (9) is rotatably connected to the driving shaft (7).

3. The rotary cutter driving roller assembly according to claim 1, characterized in that: The scraping member (2) has one, and the first driving ring (3) is one arranged on one side of the scraping member (2) or two arranged on both sides of the scraping member (2).

4. The driving roller assembly of a rotary cutter according to claim 2, characterized in that: A second drive ring (4) rotatable with the drive shaft (7) is provided on one side of the first drive ring (3) or on the outer circle of the first drive ring (3); the second drive ring (4) is coaxial with the first drive ring (3); teeth are provided on the circumference of the second drive ring (4); the teeth are higher than the surface of the first drive ring (3).

5. The driving roller assembly of a rotary cutter according to claim 2, characterized in that: At least one recess (13) is provided on the circumference of the friction ring (9), and a limiting unit is detachably connected to the frame (18), the limiting unit being against the recess (13).

6. The driving roller assembly of a rotary cutter according to claim 5, characterized in that: The limiting unit comprises a mounting plate (6) detachably connected to a frame (18) and a blocking block (8) clamped between the mounting plate (6) and a friction ring (9), wherein the blocking block (8) abuts against the recess (13), and a groove for allowing the first driving ring (3) to pass through is provided on a side of the blocking block (8) close to the driving shaft (7).

7. The driving roller assembly of a rotary cutter according to claim 5, characterized in that: A side of the pit (13) close to the center of the friction ring (9) is a plane, the distance between the plane and the center of the friction ring (9) is less than the diameter of the friction ring (9), and the limiting unit abuts against the plane.

8. The driving roller assembly of a rotary cutter according to claim 1, characterized in that: A support block (5) is fixedly connected to the frame (18), the support block (5) abuts against the friction ring (9), and a key for preventing the friction ring (9) from rotating is provided between the friction ring (9) and the support block (5).

9. The driving roller assembly of a rotary cutter according to claim 2, characterized in that: The drive shaft (7) is sleeved with an inner ring (11) at the position where the friction ring (9) is located and can rotate with the drive shaft (7); the friction ring (9) is sleeved outside the inner ring (11); a ball (10) is arranged between the friction ring (9) and the inner ring (11); the end face of the inner ring (11) abuts against the end face of the first drive ring (3); and the two end faces of the inner ring (11) are respectively higher than the corresponding end faces of the friction ring (9).

10. The driving roller assembly of a peeling machine according to claim 1, characterized in that: The first drive ring (3) and the friction ring (9) are arranged alternately, the surface of the first drive ring (3) is provided with knurling, the drive shaft (7) is provided with a keyway in the radial direction, and the inner hole of the first drive ring (3) is provided with a protrusion (12) for matching with the keyway.

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