Cutter with adjustable cutting working face in forestry pruning

Abstract

The utility model relates to an adjustable cutting knife for a cutting working face in forestry pruning, and solves the problems that the forestry landscape tree modeling pruning working face is small and the efficiency is low. Comprising a fixed cutter, a movable cutter, a protective cover, a rotating shaft, a driven wheel, a driving wheel, a motor and a telescopic rod. The triangular vertexes of the movable cutter blades face the outside of the cutter head, the convex blocks of the sliding blocks on the blades enter the cutter grooves in the cutter head from the edges of the concave cutter grooves in the circumference of the cutter head and can slide in the concave cutter grooves, and the sliding blocks are fixed from the other side of the cutter head by inserting two bolts into adjacent blade fixing holes in the two sides of the convex blocks. The sliding blocks are fixed through the blade fixing holes in different positions, so that the lengths of the blades extending out of the cutterhead are different, and when the blades are fixed to the two blade fixing holes in the edge, the shearing area formed by the blades is the largest. The device is reasonable in design, easy to manufacture and operate, convenient to disassemble and assemble, high in cutter shearing capacity, high in working efficiency and capable of achieving continuous operation.

Description

Technical Field

[0001] This utility model belongs to the field of forestry pruning technology, specifically an adjustable cutting blade for forestry pruning. Background Technology

[0002] Forest pruning is an important forestry management technique for landscaping, tree planting, and other related activities. It involves the purposeful pruning of trees to improve their growth, structure, and health, as well as enhancing their aesthetic appeal and making them suitable for landscaping. Pruning promotes photosynthesis, increasing timber yield and quality, while also improving ventilation and light penetration, and aiding in pest and disease control. The most traditional pruning technique involves large numbers of people manually pruning with shears. With the development of modern technology, mechanical pruning devices have emerged. These devices typically consist of a straight blade rotated by a motor. However, with the increasing area of ​​green spaces and the workload of forestry pruning, this straight blade is far from sufficient. Problems include low efficiency, small working area, and insufficient shearing force. On a forestry area exceeding 10 acres, one machine can prune at most one acre per day. For thicker branches, multiple pruning sessions are often necessary, resulting in uneven branch heights and a lack of aesthetic appeal. When encountering relatively soft branches, the straight blade passes over them, causing the branches to bend and then straighten again without being cut. In practice, operators often make the straight blade too large. During rotation, the shearing force of the straight blade is unevenly distributed, and branches near the axis of rotation are not cut. When cutting small trees, such an oversized straight blade results in a waste of power resources because the straight line is too long, leaving no trees to cut at the outer edge of the blade.

[0003] Therefore, in practical work, there is a need for a tool that can smoothly complete the cutting work regardless of whether the branches being cut are strong or soft, depending on the size of the working area. It should have strong shearing force, be easy to use, and be able to efficiently complete forestry pruning, trimming, and beautification work. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and defects of the existing technology and provide an adjustable cutting blade for forestry pruning.

[0005] This utility model solves the technical problem through the following technical solution. An adjustable cutting blade for forestry pruning includes a fixed blade, a moving blade, a protective cover, a rotating shaft, a driven wheel, a driving wheel, a motor, and a telescopic rod.

[0006] like Figure 2 As shown, the moving tool includes a cutter head, a blade, a cutter groove, a blade fixing hole, a center hole, and a slider;

[0007] like Figure 1As shown, a motor, a drive wheel, and a driven wheel are installed inside the telescopic rod. The drive wheel is connected to the motor, and the rotation of the motor drives the drive wheel to rotate. The driven wheel is connected to the drive wheel, changing the direction of the motor's rotation. The shaft is a cylindrical long shaft, with one end connected to the driven wheel and the other end connected to the central hole.

[0008] The fixed blade is a metal blade, rectangular at one end and triangular at the other end. The rectangular side of the fixed blade is fixed to the protective cover. There is a certain gap between the blade of the moving blade and the fixed blade so that the blade of the moving blade does not come into contact with the fixed blade during rotation.

[0009] like Figure 2 , Figure 3 As shown, the cutter head is a circular metal disc with a threaded opening at the center, which is the central hole; a concave straight cutter groove is provided on the cutter head from the central hole to the circumference of the cutter head, and at least 4 blade fixing holes are provided on the cutter groove. The blade fixing holes are threaded and penetrate the cutter groove.

[0010] like Figure 4 As shown, one end of the blade is rectangular and the other end is triangular, with a slider welded to the rectangular end.

[0011] Preferably, the triangle sides of the fixed blade and the cutting blade are serrated;

[0012] like Figure 3 , Figure 4 As shown, the slider is a metal block, including a long block and a convex block, which can be integrally formed. One side of the long block is welded to one rectangular end of the blade.

[0013] like Figure 2 , Figure 3 As shown, the apex of the triangle on the blade faces outward from the cutter head. The convex block of the slider on the blade enters the groove on the cutter head from the edge of the concave groove on the circumference of the cutter head, and can slide in the concave groove. Two bolts are inserted into the adjacent blade fixing holes on both sides of the convex block to fix the slider from the other side of the cutter head. By fixing the slider through the blade fixing holes at different positions, the length of the blade extending out of the cutter head is different. When it is fixed on the two outermost blade fixing holes, the cutting area formed by the blade is the largest.

[0014] Preferably, the cutter head is provided with 6 cutter grooves, and each cutter groove is provided with 6-8 blade fixing holes.

[0015] When the device is in operation, first determine the area of ​​the tree to be cut, then determine the length of the blade extending beyond the cutter head based on the area. Next, place the blade into the blade groove and slide it to the determined position using a slider. Then, insert two bolts into the adjacent blade fixing holes on both sides of the convex block to secure the blade. Third, connect the moving blade's cutter head to the driven wheel via a rotating shaft, adjust the length of the telescopic rod, and start the motor. The operator stands on one side of the protective cover. The moving blade rotates, leaving a gap between it and the fixed blade. During rotation, a large shearing force is generated. Depending on the set motor power, it can cut trees and garden plants of varying thicknesses. Because there is a gap between the fixed and moving blades, the moving blade can only rotate during operation and must not collide with the fixed blade during idle motion. The fixed blade remains stationary during operation.

[0016] The device can be equipped with a 3-50KW motor, and the harvesting efficiency is 300-500m. 2 This utility model is reasonably designed, easy to manufacture and operate, easy to disassemble and install, has strong cutting ability, high working efficiency, and can achieve continuous operation. Attached Figure Description

[0017] Appendix Figure 1 A schematic diagram of the cutter structure is attached. Figure 2 A schematic diagram of the moving blade structure is attached. Figure 3 This is a schematic diagram of the moving cutter slider structure; Figure 4 This is a schematic diagram of the blade's planar structure.

[0018] Illustration:

[0019] 1. Fixed blade, 2. Moving blade, 3. Protective cover, 4. Rotating shaft, 5. Driven wheel, 6. Driving wheel, 7. Motor, 8. Telescopic rod;

[0020] 2-1 Cutter head, 2-2 Blade, 2-3 Cutter groove, 2-4 Blade fixing hole, 2-5 Center hole, 2-6 Slider;

[0021] 2-6-1 Changxing block, 2-6-2 convex block. Detailed Implementation

[0022] The adjustable cutting blade for forestry pruning includes a fixed blade 1, a moving blade 2, a protective cover 3, a rotating shaft 4, a driven wheel 5, a driving wheel 6, a motor 7, and a telescopic rod 8.

[0023] like Figure 2 As shown, the moving blade 2 includes a blade disc 2-1, a blade 2-2, a blade groove 2-3, a blade fixing hole 2-4, a center hole 2-5, and a slider 2-6;

[0024] like Figure 1As shown, a motor 7, a drive wheel 6, and a driven wheel 7 are installed inside the telescopic rod 8. The drive wheel 6 is connected to the motor 7. The rotation of the motor 7 drives the drive wheel 6 to rotate. The driven wheel 5 is connected to the drive wheel 6, changing the direction of rotation of the motor 7. The rotating shaft 4 is a cylindrical long shaft, with one end connected to the driven wheel 5 and the other end connected to the center hole 2-5.

[0025] The fixed blade 1 is a metal blade with a rectangle at one end and a triangle at the other end. The rectangular side of the fixed blade 1 is fixed to the protective cover 3. There is a certain gap between the blade 2-2 of the moving blade 2 and the fixed blade 1 so that the blade 2-2 of the moving blade 2 does not come into contact with the fixed blade during rotation.

[0026] like Figure 2 , Figure 3 As shown, the cutter head 2-1 is a circular metal disc with a threaded opening at the center, which is a central hole 2-5. On the cutter head 2-1, a concave straight cutter groove 2-3 is provided from the central hole 2-5 to the circumference of the cutter head 2-1. At least 4 blade fixing holes 2-4 are provided on the cutter groove 2-3. The blade fixing holes 2-4 are threaded and penetrate the cutter groove 2-3.

[0027] like Figure 4 As shown, one end of the blade 2-2 is rectangular and the other end is triangular. A slider 2-6 is welded to the rectangular end.

[0028] Preferably, the two sides of the triangle formed by the fixed blade 1 and the blade 2-2 are serrated;

[0029] like Figure 3 , Figure 4 As shown, slider 2-6 is a metal block, including elongated block 2-6-1 and convex block 2-6-2, which can be integrally formed. One side of elongated block 2-6-1 is welded to one rectangular end of blade 2-2.

[0030] like Figure 2 , Figure 3 As shown, the apex of the triangle of blade 2-2 faces outward from the cutter head 2-1. The convex block 2-6-2 of the slider 2-6 on blade 2-2 enters the groove 2-3 on the cutter head 2-1 from the edge of the concave groove 2-3 on the circumference of the cutter head 2-1, and can slide within the concave groove 2-3. Two bolts are inserted into the adjacent blade fixing holes 2-4 on both sides of the convex block 2-6-2 to fix the slider 2-6 from the other side of the cutter head 2-1. By fixing the slider 2-6 through the blade fixing holes 2-4 at different positions, the length of the blade 2-2 extending out of the cutter head 2-1 is different. When fixed in the two outermost blade fixing holes 2-4, the cutting area formed by the blade 2-2 is the largest.

[0031] Preferably, the cutter head 2-1 is provided with 6 cutter grooves 2-3, and each cutter groove 2-3 is provided with 6-8 blade fixing holes 2-4.

[0032] When the device is in operation, first determine the size of the area to be cut, and then determine the length of the blade 2-2 extending beyond the cutter head 2-1 based on the size of the area to be cut. Next, place the blade 2-2 into the cutter groove 2-3 and slide it along the slider 2-6 to the determined position where the blade 2-2 extends beyond the cutter head 2-1. Insert two bolts into the adjacent blade fixing holes 2-4 on both sides of the convex block 2-6-2 to fix the blade 2-2. Third, connect the cutter head 2-1 of the moving blade 2 to the driven wheel 5 via the rotating shaft 4, adjust the length of the telescopic rod 8, and start the motor 7. The operator stands on one side of the protective cover 3. The moving blade 2 rotates, leaving a gap between the blade 2-2 of the moving blade 2 and the fixed blade 1. During rotation, a large shearing force is generated. Depending on the set motor power, it can cut trees and garden plants of different thicknesses. There is a gap between the fixed blade 1 and the blade 2-2 of the moving blade 2. During operation, the moving blade 2 can only rotate and must not collide with the fixed blade 1 during idle motion. The fixed blade 1 remains stationary during operation.

[0033] The device can be equipped with a 3-50KW motor, and the harvesting efficiency is 300-500m. 2 This utility model is reasonably designed, easy to manufacture and operate, easy to disassemble and install, has strong cutting ability, high working efficiency, and can achieve continuous operation.

Claims

1. An adjustable cutting blade for a cutting face of a pruning shear in forestry, characterized in that: The fixed knife, the moving knife, the protective cover, the rotating shaft, the driven wheel, the driving wheel, the motor and the telescopic rod are included. The moving knife includes the knife disc, the blade, the blade slot, the blade fixing hole, the center hole and the sliding block. The motor, the driving wheel and the driven wheel are arranged in the telescopic rod. The rotating shaft is a cylindrical long shaft, one end of which is connected to the driven wheel and the other end of which is connected to the center hole. The fixed knife is a metal knife, one end of which is rectangular and the other end of which is triangular. The fixed knife is fixed on the protective cover by the rectangular side. The blade of the moving knife is not in contact with the fixed knife during rotation. The knife disc is a circular metal disc, the center of which is provided with an opening with a thread, i.e. the center hole.

2. The adjustable cutting blade for a cutting face of a forestry pruning shear according to claim 1, characterized in that: The concave straight blade slot is arranged on the knife disc from the center hole to the circumference of the knife disc.

3. The adjustable cutting blade for a shearing face of a forestry pruning shear according to claim 1, characterized in that: The blade is rectangular at one end and triangular at the other end. The sliding block is a metal block, which includes a long block and a convex block and can be integrally formed. The convex block of the sliding block on the blade is inserted into the blade slot on the knife disc from the edge of the concave blade slot at the circumference of the knife disc. The sliding block is fixed on the other side of the knife disc by two bolts inserted into the adjacent blade fixing holes on both sides of the convex block. The length of the blade extending out of the knife disc is different by fixing the sliding block on the blade fixing holes at different positions. The two sides of the triangular shape of the fixed knife and the blade are sawtooth-shaped. Six blade slots are arranged on the knife disc, and 6-8 blade fixing holes are arranged on each blade slot.

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