A wooden stick cutting device

Abstract

This invention discloses a wood cutting device, belonging to the field of wood processing technology. The device includes a base, a power drive unit, and a wood cutting component. The power drive unit drives a rotating shaft to rotate a serrated rotary cutter. The wood cutting component includes a spiral cutter and a serrated rotary cutter. The spiral cutter and the serrated rotary cutter are coaxially arranged, both with a spiral structure at their front ends. The spiral cutter has a cutting edge on its end face and a serrated end; the serrated rotary cutter has serrations on its end face. When the wood enters the device, the spiral cutter quickly cuts the wood using a rotary cutting method, avoiding sawdust flying. When encountering hard areas such as tillers, nodules, or callus tissue, the spiral cutter moves backward under the action of a spring, and the serrated rotary cutter automatically participates in the cutting, ensuring reliable cutting. Compared with traditional sawing methods, this device has high cutting efficiency and a clean cut, enabling the wood to be directly processed into fireplace fuel, cutting substrate, or mushroom cultivation material.

Description

Technical Field

[0001] This invention relates to a wood cutting device, belonging to the field of wood processing technology. Background Technology

[0002] Cutting wood sticks is a common process in wood processing, horticultural substrate preparation, and the utilization of agricultural and forestry by-products. Current cutting methods primarily involve manual sawing or electric sawing. For example, Chinese patent document CN119772998B discloses an agricultural wood cutting device and its working method, which uses a motor-driven saw blade to cut wood sticks. However, in actual use, sawing generates a large amount of sawdust, which is not only difficult to clean but also easily spreads dust, affecting the working environment. This patent employs a dust-collecting hood structure, which can reduce sawdust and dust to some extent. Furthermore, Chinese patent CN223044727U discloses a cutting device for wood processing, but its cutting method is still sawing, which has limited efficiency and produces a relatively rough cut, hindering further utilization of the wood sticks.

[0003] Overall, the existing technology mainly uses saw blade cutting, which has the following shortcomings: (1) the cutting efficiency is low and it is difficult to meet the needs of batch processing; (2) the sawing process causes wood chips to fly, which affects environmental hygiene and increases the amount of subsequent cleaning work; (3) the cut surface after sawing is not smooth or cracks appear. If the wood stick is used as a cutting substrate, the survival rate will be affected, reducing its utilization value.

[0004] Based on this, the present invention provides a wood cutting device. This device employs a structural design combining a spiral cutter and a serrated rotary cutter. In most cases, the spiral cutter alone can achieve smooth cutting, avoiding sawdust production and improving processing efficiency. When encountering hard areas such as wood tillers, nodules, or callus tissue, the serrated rotary cutter automatically participates in the cutting, thus ensuring the reliability of the device. Compared with traditional sawing methods, the device of the present invention not only has a faster cutting speed and a cleaner cut, but also can directly cut waste wood into fireplace fuel, cut branches into cuttings for propagation, or cut wood into mushroom substrate for utilization. Summary of the Invention

[0005] To address the aforementioned problems in existing technologies, this invention aims to overcome issues such as low cutting efficiency, sawdust flying, and uneven cut edges in current wood cutting techniques. It provides a fixed wood cutting device with a reasonable structure and stable cutting effect. By incorporating a spiral cutter and a serrated rotary cutter into the device, most wood sticks can be smoothly cut by the spiral cutter, ensuring a fast and clean cutting process without generating excessive sawdust. When encountering locally hard areas such as tillers, nodules, or callus tissue, the serrated rotary cutter automatically participates in the cutting, improving the device's adaptability to complex wood sticks. This structure not only improves cutting efficiency but also avoids the dust and rough cut edge problems associated with a single sawing method, thus enabling the cut wood sticks to be better used in fuel utilization, cutting propagation, and mushroom cultivation.

[0006] The technical solution of this invention is implemented as follows: A wood cutting device includes a base 1, a power drive device, and a wood cutting device 6. The wood cutting device 6 includes a feeding support 601, a serrated rotary cutter 603, and a spiral cutter 607. The power drive device drives the serrated rotary cutter 603 to rotate via a rotating shaft 617, and a spring 617 provided on the rotating shaft 617 presses the serrated rotary cutter 603 forward. The spiral cutter 607 is coaxially and slidably mounted on the outer side of the serrated rotary cutter 603, and the spiral cutter... Multiple springs 610 are provided between the blade 607 and the serrated rotary cutter 603. The front end of the serrated rotary cutter 603 and the front end of the spiral cutter 607 are both spiral structures. The front end face of the serrated rotary cutter 603 is provided with serrations, and the front end face of the spiral cutter 607 is provided with a cutting edge. The spiral end of the end face is provided with a serrated part 606. The spiral parameters of the spiral cutter 607 are the same as those of the serrated rotary cutter 603. Both are one-turn spiral structures, and the start and end positions of the spiral structures are the same.

[0007] The spiral cutter 607 is provided with a feed support 601 on its front side. The lower end of the feed support 601 is fixed on the base 1. A baffle 619 is provided on the feed support 601.

[0008] Preferably, the feed support 601 is provided with an arc notch 618, which is in clearance fit with the spiral cutter 607, and the arc notch 618 is located on the outside of the spiral cutter 607.

[0009] Preferably, the front end of the rotating shaft 617 is slidably mounted on the center hole of the serrated rotary cutter 603 via a spline. A spring 605 is sleeved on the rotating shaft 617 located between the serrated rotary cutter 603 and the front end of the hollow shaft 4. Two adjusting nuts 604 are screwed onto the rotating shaft 617 behind the spring 605 via a helical pair. Two locking nuts 616 are screwed onto the front end of the rotating shaft 617 via a helical pair.

[0010] Preferably, the outer cylindrical surface of the spiral cutter 607 is evenly distributed with eight bosses 608 along the circumferential direction, and the sawtooth rotary cutter 603 is provided with eight bosses 611 at positions corresponding to the bosses 608. The inner hole of one boss 608 is connected to the inner hole of the corresponding boss 611 by a connecting bolt 609, and the connecting bolt 609 slides in fit with the inner hole of the boss 608 and the inner hole of the boss 611. A spring 610 is sleeved on each bolt 609 located between the bosses 608 and the bosses 611.

[0011] Preferably, the base 1 is provided with a rear extension boss three inside the front side of the spiral cutter 607. The support seat 613 is fixed in the middle of the boss three. The upper end of the support seat 613 is provided with a support plane 612 that is higher on the left and lower on the right. The support plane 612 is higher at the back and lower at the front. A baffle 614 is fixed on the right side of the boss three. The baffle 614 has a sloping structure that is higher on the right and lower on the left. The fixed position of the baffle 614 on the boss three can be adjusted in the left and right direction.

[0012] Preferably, the upper rear side of the feed support 601 is provided with a support plane 615 that is higher on the left and lower on the right, and the support plane is located outside the notch where the spiral start and end positions of the spiral cutter 607 intersect. A baffle 619 is provided in front of the support plane 615.

[0013] Preferably, the power drive device includes a motor 2, a reducer 3, a hollow shaft 4, and a bearing seat 5. The output shaft of the motor 2 is connected to the reducer 3, and the output shaft of the reducer 3 is fixed to the rear end of the hollow shaft 4. The hollow shaft 4 is rotatably installed in the bearing seat 5. The motor 2, the reducer 3, and the bearing seat 5 are all fixed on the base 1. The front end of the hollow shaft 4 is fixed with a rotating shaft 617.

[0014] Preferably, a protective cover 602 is provided on the outer side of the serrated rotary cutter 603 and the spiral cutter 607. The lower end of the protective cover 602 is fixed on the base 1, and the protective cover 602 is provided with a material inlet at the position of the support plane 615.

[0015] Preferably, the spiral cutter 607 has a right-hand spiral direction, and when viewed from front to back, the spiral cutter 607 rotates in a clockwise direction.

[0016] Preferably, the base 1 has a downwardly inclined feeding slope 101 at its front end.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. Improved cutting efficiency: This invention utilizes the spiral cutting action of the spiral cutter to quickly cut the wooden stick in most cases, which is more efficient than relying solely on a saw blade;

[0019] 2. Reduce sawdust: The rotary cutting process is a continuous cutting process, and the wood stick is smoothly cut off, which will not produce a lot of sawdust and debris, improve the working environment and reduce subsequent cleanup work;

[0020] 3. Clean and reliable cut: The spiral cutter and the toothed rotary cutter work together to ensure a clean cut on the wood stick, avoiding the roughness or cracking problems that occur with traditional sawing methods. This allows the cut wood stick to be better used in fuel utilization, cutting substrate or mushroom cultivation and other scenarios.

[0021] 4. High adaptability: When encountering hard areas such as tillers, nodules, or callus tissue, the spiral cutter moves backward under the action of the spring, and the serrated rotary cutter automatically intervenes to cut, which solves the problem of hard areas that are difficult to handle by ordinary rotary cutting and improves the reliability of the device.

[0022] 5. Reasonable structural design: The device adopts a spring clamping and screw pair adjustment structure, which can not only ensure the close contact of the cutter during normal cutting, but also provide buffer protection when the cutting resistance is too high, avoiding damage to the cutter or motor and extending the service life of the whole machine. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the wood cutting device. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the overall structure of the wood cutting device. Figure 2 ;

[0025] Figure 3 This is a schematic diagram of the rotary cutting mechanism;

[0026] Figure 4 This is a structural diagram of the wooden support and material feeding section;

[0027] Figure 5 This is a schematic diagram of a wood rod rotary cutting structure;

[0028] Figure 6 This is a schematic diagram of a serrated rotary cutter.

[0029] Explanation of reference numerals in the attached drawings: 1-base, 2-motor, 3-reducer, 4-hollow shaft, 5-bearing seat, 6-wood cutting device, 7-wood stick, 101-feeding inclined surface, 601-feeding support, 602-protective cover, 603-serrated rotary cutter, 604-adjusting nut, 605-spring one, 606-serrated part, 607-spiral cutter, 608-protrusion one, 609-connecting bolt, 610-spring two, 611-protrusion two, 612-support plane one, 613-support base, 614-baffle one, 615-support plane two, 616-locking nut, 617-rotating shaft, 618-arc notch, 619-baffle two. Detailed Implementation

[0030] Combination Figure 1-6 This invention discloses a wood cutting device, comprising a base 1, a motor 2, a reducer 3, a hollow shaft 4, a bearing seat 5, and a wood cutting device 6. The wood cutting device 6 includes an infeed support 601, a protective cover 602, a serrated rotary cutter 603, an adjusting nut 604, a first spring 605, a spiral cutter 607, a first boss 608, a connecting bolt 609, a second spring 610, a second boss 611, a support seat 613, a first baffle 614, a locking nut 616, and a rotating shaft 617. The direction towards the wood cutting material is defined as the front side, and the direction towards the motor is defined as the rear side, in order to describe this application.

[0031] The output shaft of the motor 2 is connected to the reducer 3. The output shaft of the reducer 3 is fixed to the rear end of the hollow shaft 4. The hollow shaft 4 is rotatably installed in the bearing seat 5. The motor 2, reducer 3, and bearing seat 5 are all fixed on the base 1.

[0032] The hollow shaft 4 has a fixed rotating shaft 617 at its front end. The rotating shaft 617 has a central hole for the saw blade 603 that is slidably mounted on its front end via a spline. A spring 605 is sleeved on the rotating shaft 617 between the saw blade 603 and the front end of the hollow shaft 4. Two adjusting nuts 604 are screwed onto the rotating shaft 617 behind the spring 605 via a helical pair. The front adjusting nut 604 rotates to adjust the pressure of the spring 605 on the saw blade 603, while the rear adjusting nut 604 locks the front adjusting nut 604 forward to prevent the adjusting nut 604 from loosening.

[0033] The front end of the serrated rotary cutter 603 is a spiral end face with serrations. A spiral cutter 607 is coaxially and slidably mounted on the outer cylindrical surface of the serrated rotary cutter 603. The front end face of the spiral cutter 607 is spiral-shaped with a cutting edge and a serrated portion 606 at the spiral end. The spiral parameters of the spiral cutter 607 are the same as those of the serrated rotary cutter 603, and both are one-turn spiral structures with the same start and end positions.

[0034] The spiral cutter 607 has eight protrusions 608 evenly distributed along its circumference on its outer cylindrical surface. The serrated rotary cutter 603 has eight protrusions 611 at positions corresponding to the protrusions 608. The inner hole of one protrusion 608 is connected to the inner hole of a corresponding protrusion 611 by a connecting bolt 609. The connecting bolt 609 slides in contact with the inner holes of both protrusions 608 and 611. A spring 610 is fitted onto each bolt 609 located between protrusions 608 and 611. The front end of the rotating shaft 617 is screwed with two locking nuts 616 via a helical pair.

[0035] The base 1 has a downward-sloping feeding ramp 101 at its front end. The base 1 has a rear extension boss three located on the lower side of the front side of the spiral cutter 607. A support seat 613 is fixed in the middle of the boss three. A support plane 612 with the left side higher than the right side is provided on the upper end of the support seat 613. The support plane 612 is higher at the back than at the front. A baffle 614 is fixed on the right side of the boss three. The baffle 614 has a slope structure with the right side higher than the left side. The fixed position of the baffle 614 on the boss three can be adjusted in the left and right direction.

[0036] The spiral cutter 607 has a feeding support 601 on the front left side. The lower end of the feeding support 601 is fixed on the base 1. The feeding support 601 has an arc notch 618. The arc notch 618 is in clearance fit with the spiral cutter 607. The arc notch 618 is located on the outside of the spiral cutter 607.

[0037] The upper rear side of the feed support 601 is provided with a support plane 615 that is higher on the left and lower on the right, and the support plane is located outside the notch where the spiral start and end positions of the spiral cutter 607 intersect. A baffle 619 is provided in front of the support plane 615.

[0038] The serrated rotary cutter 603 and the spiral cutter 607 are provided with a protective cover 602 on their outer sides. The lower end of the protective cover 602 is fixed on the base 1. The protective cover 602 is provided with a material inlet notch at the position of the support plane 615.

[0039] In use, according to the required cutting length of the wooden stick, adjust the fixed position of the baffle 614 on the boss 3 along the left and right direction. Then, the motor 2 drives the hollow shaft 4 to rotate through the reducer 3. The speed of the motor 2 is 10 revolutions per minute. The rotation of the shaft 617 drives the serrated rotary cutter 603 to rotate. When the notch where the spiral start and end positions of the front end face of the spiral cutter 607 intersect reaches the feeding notch position, insert the wooden stick 7 into the spiral cutter 607 through the feeding notch, and let the end touch the baffle 614. The wooden stick 7 is placed on the support plane 612 and the support plane 615. The spiral cutter 607 rotates, and its end face is spiral, and the spiral direction is right-handed. When viewed from front to back, the spiral cutter 607 rotates in a clockwise direction. The distance between the cutting edge of the spiral cutter 607 and the wooden stick 7 gradually becomes zero. The wooden stick 7 is blocked by the baffle 2 and cannot move forward until the wooden stick 7 is cut off. The severed wooden sticks fell along the rear-high-front-low support plane 612 and the cutting slope 101.

[0040] When there is bark on the outside of the wooden stick 7, the bark may not be cut by the smooth cutting edge of the spiral cutter 607 due to its toughness, but the serrated part 606 at the end of the spiral will cut the bark.

[0041] The thickened and harder parts of the wood stick formed at the tillering point, nodule, or callus tissue may not be cut by the spiral cutter 607. Therefore, the axial compressive force on the wood stick 7 increases, the spiral cutter 607 compresses the spring 610, the spiral cutter 607 moves backward, and the serrated rotary cutter 603 cuts the hard part of the wood stick 7. After rotating a few times, the serrated rotary cutter 603 saws off the hard part of the wood stick 7.

[0042] During the cutting process of the wooden stick 7, the spring 605 provides elastic clamping force, which makes the spiral cutter 607 or the serrated rotary cutter 603 fit against the cutting wooden stick, preventing damage to the spiral cutter 607 or the serrated rotary cutter 603 due to excessive cutting force, or damage to the motor 2.

Claims

1. A wooden stick cutting device, characterized in that: The system includes a base (1), a power drive device, and a wood cutting device (6). The wood cutting device (6) includes a feeding support (601), a serrated rotary cutter (603), and a spiral cutter (607). The power drive device drives the serrated rotary cutter (603) to rotate via a rotating shaft (617), and a spring (610) on the rotating shaft (617) presses the serrated rotary cutter (603) forward. The spiral cutter (607) is coaxially and slidably mounted on the outer side of the serrated rotary cutter (603). The spiral cutter (607) and the serrated rotary cutter... Multiple springs (605) are provided between the rotary cutters (603). The front ends of the sawtooth rotary cutter (603) and the spiral cutter (607) are both spiral structures. The front end face of the sawtooth rotary cutter (603) is provided with saw teeth, and the front end face of the spiral cutter (607) is provided with a cutting edge. The spiral end face is provided with a sawtooth part (606). The spiral parameters of the spiral cutter (607) are the same as those of the sawtooth rotary cutter (603). Both are one-turn spiral structures, and the start and end positions of the spiral structures are the same. The spiral cutter (607) is provided with a feed support (601) on its front side. The lower end of the feed support (601) is fixed on the base (1). A baffle (619) is provided on the feed support (601).

2. The wood cutting device according to claim 1, characterized in that: The feed support (601) is provided with an arc notch (618), which is in clearance fit with the spiral cutter (607), and the arc notch (618) is located on the outside of the spiral cutter (607).

3. The wood cutting device according to claim 1, characterized in that: The front end of the rotating shaft (617) is slidably mounted with the center hole of the saw blade (603) via a spline. A spring (605) is sleeved on the rotating shaft (617) located between the saw blade (603) and the front end of the hollow shaft (4). Two adjusting nuts (604) are screwed onto the rotating shaft (617) behind the spring (605) via a helical pair. Two locking nuts (616) are screwed onto the front end of the rotating shaft (617) via a helical pair.

4. The wood cutting device according to claim 1, characterized in that: The spiral cutter (607) has eight bosses (608) evenly distributed along the circumference on its outer cylindrical surface. The sawtooth rotary cutter (603) has eight bosses (611) at positions corresponding to the bosses (608). The inner hole of one boss (608) and the inner hole of the corresponding boss (611) are connected by a connecting bolt (609). The connecting bolt (609) slides in fit with the inner hole of the boss (608) and the inner hole of the boss (611). A spring (610) is fitted on each bolt (609) between the bosses (608) and the bosses (611).

5. The wood cutting device according to claim 1, characterized in that: The base (1) is located on the lower side of the front side of the spiral cutter (607) and has a rear extension boss three. The support seat (613) is fixed in the middle of the boss three. The upper end of the support seat (613) is provided with a support plane one (612) that is higher on the left and lower on the right. The support plane one (612) is higher in the back and lower in the front. The right side of the boss three is fixed with a baffle one (614). The baffle one (614) has a sloping structure that is higher on the right and lower on the left. The fixed position of the baffle one (614) on the boss three can be adjusted along the left and right direction.

6. The wood cutting device according to any one of claims 1-5, characterized in that: The feed support (601) has a support plane (615) with the left side higher than the right side on the rear side. The support plane is located outside the notch where the spiral start and end positions of the spiral cutter (607) intersect. A baffle (619) is provided on the front side of the support plane (615).

7. The wood cutting device according to any one of claims 1-5, characterized in that: The power drive device includes a motor (2), a reducer (3), a hollow shaft (4), and a bearing seat (5). The output shaft of the motor (2) is connected to the reducer (3). The output shaft of the reducer (3) is fixed to the rear end of the hollow shaft (4). The hollow shaft (4) is rotatably installed in the bearing seat (5). The motor (2), the reducer (3), and the bearing seat (5) are all fixed on the base (1). The front end of the hollow shaft (4) is fixed with a rotating shaft (617).

8. The wood cutting device according to any one of claims 1-5, characterized in that: The saw blade (603) and the spiral blade (607) are provided with a protective cover (602) on their outer sides. The lower end of the protective cover (602) is fixed on the base (1). The protective cover (602) is provided with a material inlet at the position of the second support plane (615).

9. The wood cutting device according to any one of claims 1-5, characterized in that: The spiral cutter (607) has a right-hand spiral direction. When viewed from front to back, the spiral cutter (607) rotates clockwise.

10. The wood cutting device according to any one of claims 1-5, characterized in that: The base (1) has a downward-sloping feeding ramp (101) at its front end.

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