Elastic pre-pressing type knife gap adjusting mechanism and wood cutting device thereof

Abstract

The utility model belongs to the technical field of wood processing, and particularly discloses an elastic pre-pressing type knife seam adjusting mechanism and a wood cutting device thereof, the elastic pre-pressing type knife seam adjusting mechanism comprises a knife body base and a double-row roller seat, a single-row roller seat used for adjusting the size of a cutter gap is rotationally connected to the cutter body seat, and a pressing roller in clearance fit with the rotary cutter is installed on the single-row roller seat. The double-row roller seat is provided with double-row rollers used for rotationally feeding wood, the double-row roller seat or the cutter body seat is slidably connected to the base, one end of the driving telescopic rod is connected to the double-row roller seat, the other end of the driving telescopic rod is hinged to the auxiliary rod, and the other end of the auxiliary rod is rotationally connected to the cutter body seat. In the cutting process, the distance between the double-row roller seat and the cutter body seat is shortened, the telescopic rod is driven for elastic pre-tightening, non-linear changing pre-tightening force can be provided for wood, cutter seams are reduced, impact can be resisted, the cutting time is shortened, and the cutting efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of wood processing, and in particular relates to an elastic pre-compression type knife gap adjustment mechanism and a wood cutting device thereof. Background Art

[0002] In wood processing and production, a rotary cutter is usually used to cut the wood; and the rotary cutter needs a rotary cutter and a single-row roller seat to complete the cutting. In order to process wood of different specifications, it is usually necessary to adjust the position of the rotary cutter to adjust the knife gap. The rotary cutter is usually detachably connected or movably connected to the single-row roller seat. When the connection is detachable, it is usually manually adjusted. When the connection is movably connected, the position of the rotary cutter can be adjusted as a whole. For example, patent CN111844322B provides a rotary cutter that uses a cam to automatically and steplessly shift to change the thickness of the rotary cut veneer.

[0003] However, during cutting, the wood will impact the single and double sticks, and the rotary cutter's blade gap is in a fixed state. The wood can only be cut by the rotary cutter after it becomes stable. Therefore, there will be a long cutting process, and the impact on the single and double sticks is greater during this process, reducing the service life. Utility Model Content

[0004] Aiming at the problem that the impact force is large and the cutting process is long in the prior art, which affects the processing efficiency, an elastic pre-compression knife gap adjustment mechanism and a wood cutting device thereof are proposed. The utility model provides the following technical solutions:

[0005] An elastic pre-tightening knife gap adjustment mechanism comprises a knife body base and a double-row roller seat, wherein the knife body base is equipped with a knife body seat and a rotary cutter for cutting wood, the knife body seat is rotatably connected with a single-row roller seat for adjusting the knife gap size, and the single-row roller seat is equipped with a pressure roller with a clearance fit with the rotary cutter; the double-row roller seat is equipped with a double-row roller for rotating and feeding wood, the double-row roller seat or the knife body seat is slidably connected to the base, and also comprises a driving telescopic rod and an auxiliary rod, wherein one end of the driving telescopic rod is connected to the double-row roller seat, and the other end is hinged to the auxiliary rod, and the other end of the auxiliary rod is rotatably connected to the knife body seat; during cutting, the distance between the double-row roller seat and the knife body seat is shortened, and the driving telescopic rod provides elastic pre-tightening.

[0006] Preferably, when the telescopic rod is driven to be in a state of maximum extension, the auxiliary rod is inclined outward.

[0007] Preferably, the double-row roller seat is horizontally slidably connected to the cutter body base, and a feed drive device for driving the double-row roller seat to move is installed on the cutter body base.

[0008] Preferably, the feed drive device adopts a hydraulic cylinder or a screw assembly.

[0009] Preferably, the rotary cutter is fixedly connected to the inner side of the cutter body base, and the pressure roller is driven by a cutter gap adjustment drive device and horizontally slidably connected to the cutter body base or the cutter body seat.

[0010] Preferably, the pressing roller is horizontally slidably connected to the knife body seat, and the knife gap adjustment driving device is installed on the knife body seat.

[0011] Preferably, the blade gap adjustment drive device includes a guide wheel and a drive wheel, the guide wheel is rotatably connected to the blade body seat, the drive wheel is rotatably connected to the blade body base and supports the guide wheel, and the drive wheel is an eccentric wheel or a cam.

[0012] Preferably, the driving wheel is coaxially connected to the auxiliary rod.

[0013] Preferably, the knife gap adjustment drive device adopts a hydraulic cylinder or a screw assembly.

[0014] A wood cutting device comprises the elastic pre-compression knife gap adjustment mechanism.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model can make the knife gap smaller in advance through the elastic pre-tightening knife gap adjustment mechanism, so that the wood can contact the single roller in advance, which has a pre-pressure effect on the wood. The wood rotates in advance to reduce the impact of sudden rotation on the single and double rollers and the thickness of the knife. The pre-pressure can be further achieved by reducing the knife gap through the eccentric wheel. The size of the pre-pressure is adjusted by pneumatic pressure. The limit value of the pre-pressure is limited by the eccentric wheel, and the situation of insufficient pressure caused by excessive pressure after letting go will not occur. The pre-pressure can compensate for the adjustment error of the eccentric wheel and does not interfere with the positioning limit of the eccentric wheel. When the user adjusts the knife gap unreasonably and the knife gap jumps, the pneumatic buffer pre-pressure will have a certain compensation effect, and achieve the purpose of convenient adjustment and increased adjustment fault tolerance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] In the attached drawings, 1. knife body base; 2. double-row roller seat; 3. double-row roller motor; 4. double-row roller; 5. wood; 6. single-row roller motor; 7. driving telescopic rod; 8. auxiliary rod; 9. knife body seat; 10. single-row roller seat. DETAILED DESCRIPTION

[0019] The directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the invention of the utility model.

[0020] Example 1

[0021] like Figure 1 As shown, an elastic pre-tightening knife gap adjustment mechanism comprises a knife body base 1 and a double-row roller seat 2, the knife body base 1 is equipped with a knife body seat 9 and a rotary cutter for cutting wood, the knife body seat 9 is rotatably connected with a single-row roller seat 10 for adjusting the knife gap size, the end of the single-row roller seat 10 is rotatably connected with a pressure roller, the pressure roller gap is set above the rotary cutter, after the single-row roller seat 10 rotates, the gap between the rotary cutter and the pressure roller changes, and the knife gap can be adjusted; the double-row roller seat 2 is equipped with a double-row roller 4 for rotating feeding wood, the double-row roller seat 2 is slidably connected to the base, and also includes a driving telescopic rod 7 and an auxiliary rod 8, one end of the driving telescopic rod 7 is connected to the double-row roller seat 2, and the other end is hinged to the auxiliary rod 8, and the other end of the auxiliary rod 8 is rotatably connected to the knife body seat 9; during cutting, the distance between the double-row roller seat 2 and the knife body seat 9 is shortened, and the driving telescopic rod 7 provides elastic pre-tightening.

[0022] Preferably, when the telescopic rod 7 is driven to the maximum extension state, the auxiliary rod 8 is tilted outward, at this time, the knife gap can be reduced and the extrusion force for the rotary cutter can be increased. As the telescopic rod 7 is driven to retract and the auxiliary rod 8 flips inwardly, the preload force will be reduced nonlinearly, so that the knife can be cut thicker and the cutting speed can be accelerated.

[0023] Preferably, the double-row roller seat 2 is horizontally slidably connected to the tool body base 1, and a feed drive device for driving the double-row roller seat 2 to move is installed on the tool body base 1; the feed drive device adopts a hydraulic cylinder or a screw assembly, and the screw assembly includes a screw, a screw nut and a screw seat, which is a conventional structure, and the screw is rotatably connected to the screw seat, and the screw nut is threadedly connected to the screw.

[0024] Preferably, the rotary cutter is fixedly connected to the inner side of the cutter body base 1, the pressure roller is driven by a cutter gap adjustment drive device and horizontally slidably connected to the cutter body seat 9, the cutter gap adjustment drive device is installed on the cutter body seat 9, and the output end is connected to the pressure roller.

[0025] Preferably, the telescopic rod 7 can be driven by a hydraulic rod or a gas rod.

[0026] Example 2

[0027] The knife gap adjustment drive device includes a guide wheel and a driving wheel, wherein the guide wheel is rotatably connected to the knife body seat 9, and the driving wheel is rotatably connected to the knife body base 1 and supports the guide wheel, and the driving wheel is an eccentric wheel or a cam; the driving wheel is coaxially connected to the auxiliary rod 8, and the guide wheel can be driven to move by the rotation of the driving wheel, thereby moving the knife body seat 9, and finally realizing the adjustment of the distance between the pressure roller and the rotary cutter (i.e., the knife gap).

[0028] Example 3

[0029] The difference from Example 2 is that the knife gap adjustment drive device adopts a hydraulic cylinder or a screw assembly to directly push the knife body seat 9; the screw assembly is a mature technology, including components such as a screw, a screw nut, and a screw fixing seat; and the hydraulic cylinder drives by hydraulically pushing the telescopic rod to move.

[0030] Example 4

[0031] A wood cutting device includes the above-mentioned elastic pre-tightening knife gap adjustment mechanism, a double-row roller seat 2 is equipped with a double-row roller motor 3, a single-row roller seat 10 is equipped with a single-row roller motor 6 for driving a rotary cutter to rotate, the double-row roller motor 3 drives and connects the double-row roller 4, the double-row roller 4 is arranged adjacent to the rotary cutter, and can drive the wood 5 to rotate through friction, and the rotary cutter is used for cutting, and it can be suitable for rotary cutters and circular cutters.

[0032] The utility model can make the knife gap smaller in advance through the elastic pre-tightening knife gap adjustment mechanism, so that the wood can contact the single roller in advance, which has a pre-pressure effect on the wood. The wood rotates in advance to reduce the impact of sudden rotation on the single and double rollers and the thickness of the knife. The pre-pressure can be further achieved by reducing the knife gap through the eccentric wheel. The size of the pre-pressure is adjusted by pneumatic pressure. The limit value of the pre-pressure is limited by the eccentric wheel, and the situation of insufficient pressure caused by excessive pressure after letting go will not occur. The pre-pressure can compensate for the adjustment error of the eccentric wheel and does not interfere with the positioning limit of the eccentric wheel. When the user adjusts the knife gap unreasonably and the knife gap jumps, the pneumatic buffer pre-pressure will have a certain compensation effect, and achieve the purpose of convenient adjustment and increased adjustment fault tolerance.

Claims

1. An elastic pre-compression knife gap adjustment mechanism, characterized in that: The invention comprises a knife body base (1) and a double-row roller base (2), wherein a knife body base (9) and a rotary cutter for cutting wood are installed on the knife body base (1), a single-row roller base (10) for adjusting the size of the knife gap is rotatably connected to the knife body base (9), and a pressure roller with a clearance fit with the rotary cutter is installed on the single-row roller base (10); a double-row roller (4) for rotating and feeding wood is installed on the double-row roller base (2), and the double-row roller base (2) or the knife body base (9) is slidably connected to the knife body base (1), and further comprises a driving telescopic rod (7) and an auxiliary rod (8), wherein one end of the driving telescopic rod (7) is connected to the double-row roller base (2), and the other end is hinged to the auxiliary rod (8), and the other end of the auxiliary rod (8) is rotatably connected to the knife body base (9); during cutting, the distance between the double-row roller base (2) and the knife body base (9) is shortened, and the driving telescopic rod (7) provides elastic pre-tightening.

2. The elastic pre-compression knife gap adjustment mechanism according to claim 1, characterized in that: When the telescopic rod (7) is driven to be in a state of maximum extension, the auxiliary rod (8) is inclined outward.

3. The elastic pre-compression knife gap adjustment mechanism according to claim 1, characterized in that: The double-row roller seat (2) is horizontally slidably connected to the knife body base (1), and a feed drive device for driving the double-row roller seat (2) to move is installed on the knife body base (1).

4. The elastic pre-compression knife gap adjustment mechanism according to claim 3, characterized in that: The feed drive device adopts a hydraulic cylinder or a screw assembly.

5. The elastic pre-compression knife gap adjustment mechanism according to claim 1, characterized in that: The rotary cutter is fixedly connected to the inner side of the cutter body base (1); the pressure roller is driven by a cutter gap adjustment drive device and is horizontally slidably connected to the cutter body base (1) or the cutter body seat (9).

6. The elastic pre-compression knife gap adjustment mechanism according to claim 5, characterized in that: The pressing roller is horizontally slidably connected to the knife body seat (9), and the knife gap adjustment driving device is installed on the knife body seat (9).

7. The elastic pre-compression knife gap adjustment mechanism according to claim 5, characterized in that: The knife gap adjustment drive device comprises a guide wheel and a drive wheel, wherein the guide wheel is rotatably connected to the knife body seat (9), and the drive wheel is rotatably connected to the knife body base (1) and receives the guide wheel, and the drive wheel is an eccentric wheel or a cam.

8. The elastic pre-compression knife gap adjustment mechanism according to claim 7, characterized in that: The driving wheel is coaxially connected to the auxiliary rod (8).

9. The elastic pre-compression knife gap adjustment mechanism according to claim 5, characterized in that: The knife gap adjustment driving device adopts a hydraulic cylinder or a screw assembly.

10. A wood cutting device, characterized in that: It comprises an elastic pre-tensioning knife gap adjustment mechanism as described in any one of claims 1-9.

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