Fly cutter fixing device of disc chipper

Abstract

The utility model discloses a fly cutter fixing device of a disc chipper, which belongs to the technical field of chipper parts and comprises a cutter head, a plurality of grooves are arranged above the cutter head, outer cutter holders are arranged on one sides of the upper portions of the grooves, inner cutter holders are arranged below the outer cutter holders, the inner cutter holders are arranged on the cutter head, and the cutter head is provided with a plurality of blades. Fly-cutter blades are clamped between the inner cutter clamps and the outer cutter clamps, a plurality of fixing bolts are arranged at the bottoms of the inner cutter clamps, rectangular springs are arranged on the fixing bolts in a sleeving mode, the rectangular springs are arranged in the cutter head, a plurality of puller bolts are arranged at the bottoms of the inner cutter clamps, and the puller bolts are rotationally connected into the cutter head. The outer cutter holder and the inner cutter holder are adopted to fix the fly cutter blade, compared with a traditional mode that a fly cutter is fixed through bolts, all parts on the cutter head do not need to be detached when the fly cutter is replaced, the replacement speed is high, the efficiency is high, the adjustable range is large, the sharpening frequency of the fly cutter is increased, and the use cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of chipper components, and particularly relates to a fly knife fixing device for a disc chipper. Background Technique

[0002] A disc chipper, also known as a wood chipper, mainly cuts raw materials such as small-diameter logs, bamboo, and slab wood. By installing several fly knives on the cutter head, when the cutter head rotates, the rotating fly knives and the fixed bottom knife shear the raw materials to cut them into thin slices. It is widely used in the stock preparation section of the production processes of industries such as textile, papermaking, pulping, and wood-based panel.

[0003] The working conditions of the chipper are complex, and the fly knives are easily worn and need to be regularly removed for replacement and grinding. In traditional chippers, most fly knives are often directly fixed on the cutter head through bolts. When replacing the fly knives, the process is complex and the efficiency is low. At the same time, using bolts for fixation has relatively strict requirements on the width of the fly knives, with a small adjustable range, reducing the number of times the fly knives can be ground and increasing the use cost. Content of the Utility Model

[0004] The purpose of the utility model is to provide a fly knife fixing device for a disc chipper to solve the problems raised in the above-mentioned prior art.

[0005] Provide a fly knife fixing device for a disc chipper, including a cutter head. There are several grooves arranged above the cutter head. One side of the upper part of each of the several grooves is provided with an outer knife clamp. An inner knife clamp is arranged below each of the outer knife clamps. The inner knife clamps are all arranged on the cutter head. A fly knife blade is clamped between each inner knife clamp and the outer knife clamp. Several fixing bolts are arranged at the bottom of each inner knife clamp. One end of each of the several fixing bolts is fixedly connected to the inner knife clamp. One end of each of the several fixing bolts is movably connected to the inside of the cutter head. A rectangular spring is sleeved on each of the several fixing bolts. The rectangular spring is arranged inside the cutter head. Several tightening bolts are arranged at the bottom of the inner knife clamp. The several tightening bolts are rotatably connected to the inside of the cutter head.

[0006] As a further embodiment of the utility model: The upper part of the inner knife clamp is detachably connected with a back knife plate. The back knife plate is fixed to the inner knife clamp by bolts. The back knife plate has a certain angle to guide the chopped wood chips towards the chip discharge groove. The part extending beyond the inner knife clamp can reduce the direct impact of the chopped wood chips on the inner knife clamp and extend the service life of the inner knife clamp.

[0007] As a further embodiment of the utility model: The bottom of the outer knife clamp is detachably connected with an adjustment plate. The fly knife blade is arranged above the adjustment plate. By installing adjustment plates with different thicknesses, the length of the fly knife blade extending outside the cutter head can be controlled.

[0008] As a further embodiment of the present utility model: The included angle between the flying knife blade and the upper horizontal plane of the cutter head assembly is α, and α is 30° to 45°. The included angle range of 30° to 45° for efficient cutting optimizes the transmission of cutting force, enabling the flying knife blade to exhibit efficient cutting performance during the cutting process. The evenly distributed cutting force reduces the wear of the flying knife blade, improves the durability of the blade, reduces the replacement frequency. The appropriate included angle helps the chips to be smoothly discharged, improves the chip removal efficiency of the equipment, and reduces the risk of blockage.

[0009] As a further embodiment of the present utility model: Positioning blocks are provided on both sides of the outer tool holder. The two positioning blocks are used to prevent the outer tool holder from generating lateral displacement during the working process, which can ensure that the outer tool holder is stably fixed on the cutter head, avoiding the decline of cutting accuracy caused by lateral movement. By restricting the lateral displacement of the outer tool holder, the positioning blocks can ensure that the flying knife blade always maintains a predetermined position and angle during the cutting process, improving the stability and consistency of cutting.

[0010] As a further embodiment of the present utility model: A first wear-resistant plate is detachably connected between the two positioning blocks. By adjusting the distance T between the flying knife blade and the first wear-resistant plate, the thickness of the chips cut can be precisely controlled. The larger the distance T, the longer the chips cut. Conversely, the smaller the distance T, the shorter the chips.

[0011] As a further embodiment of the present utility model: A second wear-resistant plate is also provided on the cutter head. The second wear-resistant plate is located on the other side of the outer tool holder and can effectively withstand the friction and impact generated during the cutting process, reducing the wear of the outer tool holder and the cutter head. The presence of the second wear-resistant plate protects the outer tool holder from direct friction and wear.

[0012] As a further embodiment of the present utility model: A sleeve is sleeved outside the rectangular spring. The sleeve is arranged inside the cutter head. A fixing bolt is movably connected inside the sleeve. When the flying knife blade needs to be replaced, loosen the tightening bolt on the inner tool holder. Due to the deformation of the rectangular spring, the inner tool holder will pull the fixing bolt to move downward along the inside of the sleeve, thereby driving the entire inner tool holder to move downward by a certain distance, increasing the distance between the inner tool holder and the outer tool holder, and loosening the flying knife blade for easy removal and replacement. During the installation process of the blade, tighten the tightening bolt on the inner tool holder. Due to the compression deformation of the rectangular spring, the inner tool holder will pull the fixing bolt to move upward along the inside of the sleeve, thereby driving the entire inner tool holder to move upward by a certain distance, reducing the distance between the inner tool holder and the outer tool holder, which helps to ensure the tight fit between the inner tool holder and the outer tool holder, thus firmly clamping the flying knife blade.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] When the outer tool holder and the inner tool holder are installed, they are positioned by the steps on both sides of the groove and fixed on the cutter head by bolts. The flying cutter blade is clamped and fixed between the outer tool holder and the inner tool holder. At the same time, the lateral displacement of the entire tool holder device is restricted by the inner positioning block and the outer positioning block.

[0015] When replacing the blade, first loosen the tightening bolt on the inner tool holder. There is a rectangular spring on the fixing bolt of the inner tool holder. Due to the action of the rectangular spring, the directional force provided by the spring will push the fixing bolt towards the outside of the cutter head, and then the inner tool holder will move downward. The distance between the outer tool holder and the inner tool holder changes, and the flying cutter blade clamped between the outer tool holder and the inner tool holder becomes loose, and then the flying cutter blade can be taken out. Similarly, when installing the flying cutter blade, first tighten the tightening bolt on the inner tool holder. There is a rectangular spring on the fixing bolt of the inner tool holder, which will compress the rectangular spring to make the fixing bolt move towards the inside of the cutter head, and lock the flying cutter blade clamped between the outer tool holder and the inner tool holder. Using the outer tool holder and the inner tool holder to fix the flying cutter blade, compared with the traditional method of fixing the flying cutter with bolts, when replacing the flying cutter, it is not necessary to remove all the components on the cutter head. The replacement speed is fast, the efficiency is high, the adjustable range is large, the number of times the flying cutter can be reground is increased, and the use cost is reduced. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present drawings or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present drawings. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of a flying cutter fixing device for a disk chipper;

[0018] Figure 2 It is a schematic perspective view of the partial structure provided by the present utility model;

[0019] Figure 3 It is a schematic perspective view of the inner tool holder and the outer tool holder provided by the present utility model;

[0020] Figure 4 It is a schematic front view sectional structure of the inner tool holder provided by the present utility model;

[0021] Figure 5 It is a schematic side view sectional structure of the inner tool holder provided by the present utility model.

[0022] In the figure: 1. Cutter head; 2. Outer tool holder; 21. Positioning block; 111. Groove; 3. Inner tool holder; 4. Fly cutter blade; 5. Fixing bolt; 6. Rectangular spring; 7. Tightening bolt; 8. Back tool plate; 9. Adjusting plate; 10. First wear-resistant plate; 11. Second wear-resistant plate; 12. Sleeve. Detailed implementation manners

[0023] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be described and explained below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0024] Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, without creative efforts, the present application can also be applied to other similar scenarios based on these drawings. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacturing or production changes made based on the technical content disclosed in the present application are only conventional technical means and should not be understood as the content disclosed in the present application being insufficient.

[0025] However, there will be cases where unnecessary detailed descriptions are omitted. For example, there are cases where detailed descriptions of well-known matters are omitted and repeated descriptions of actually identical structures are omitted. This is to avoid the following descriptions from becoming unnecessarily lengthy and to facilitate the understanding of those skilled in the art. In addition, the accompanying drawings and the following descriptions are provided for those skilled in the art to fully understand the present application and are not intended to limit the subject matter recited in the claims.

[0026] Please refer to Figures 1-5As shown in the figure, in the embodiment of the present utility model, a fly cutter fixing device for a disc chipper includes a cutter disc 1. Above the cutter disc 1, there are a number of grooves 111 which are distributed along the circumference of the cutter disc 1. Each groove 111 is used to install an outer cutter clamp 2 and an inner cutter clamp 3. On one side of the upper part of each of the a number of grooves 111, there is an outer cutter clamp 2 which is used to fix one side of the fly cutter blade 4. Below each outer cutter clamp 2, there is an inner cutter clamp 3. The fly cutter blade 4 is clamped between the inner cutter clamp 3 and the outer cutter clamp 2. The inner cutter clamp 3 is arranged below the outer cutter clamp 2 and clamps the fly cutter blade 4 together with the outer cutter clamp 2. At the bottom of each inner cutter clamp 3, there are a number of fixing bolts 5. One end of each of the a number of fixing bolts 5 is fixedly connected to the inner cutter clamp 3, and one end of each of the a number of fixing bolts 5 is movably connected to the inside of the cutter disc 1. A rectangular spring 6 is sleeved on each of the a number of fixing bolts 5. The rectangular spring 6 is arranged inside the cutter disc 1 and is sleeved on the fixing bolt 5, providing an elastic acting force inside the cutter disc 1 for adjusting the position of the fixing bolt 5, and further adjusting the distance between the inner cutter clamp 3 and the outer cutter clamp 2. At the bottom of the inner cutter clamp 3, there are a number of tightening bolts 7. The a number of tightening bolts 7 are rotatably connected to the inside of the cutter disc 1. The tightening bolts 7 are arranged at the bottom of the inner cutter clamp 3 for adjusting the position of the inner cutter clamp 3; the fly cutter blade 4 is clamped and fixed between the outer cutter clamp 2 and the inner cutter clamp 3;

[0027] When replacing the blade, first loosen the tightening bolt 7 on the inner cutter clamp 3. The fixing bolt 5 on the inner cutter clamp 3 is equipped with a rectangular spring 6. Due to the action of the rectangular spring 6, the directional acting force provided by the spring will push the fixing bolt 5 towards the outside of the cutter disc 1, and then the inner cutter clamp 3 will move downward, the distance between the outer cutter clamp 2 and the inner cutter clamp 3 changes, and the fly cutter blade 4 clamped between the outer cutter clamp 2 and the inner cutter clamp 3 becomes loose, and then the fly cutter blade 4 can be taken out. Similarly, when installing the fly cutter blade 4, first tighten the tightening bolt 7 on the inner cutter clamp 3. The fixing bolt 5 on the inner cutter clamp 3 is equipped with a rectangular spring 6, which will compress the rectangular spring 6 and make the fixing bolt 5 move towards the inside of the cutter disc 1 to lock the fly cutter blade 4 clamped between the outer cutter clamp 2 and the inner cutter clamp 3. Using the outer cutter clamp 2 and the inner cutter clamp 3 to fix the fly cutter blade 4, compared with the traditional way of fixing the fly cutter with bolts, when replacing the fly cutter, it is not necessary to remove all the components on the cutter disc 1. The replacement speed is fast, the efficiency is high, the adjustable range is large, the number of times the fly cutter can be sharpened is increased, and the use cost is reduced.

[0028] In a further embodiment, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, a back knife plate 8 is detachably connected to the upper part of the inner knife holder 3. The back knife plate 8 is fixed to the inner knife holder 3 by bolts. The back knife plate 8 has a certain angle, which guides the chopped wood chips towards the chip discharge groove. The part extending beyond the inner knife holder 3 can reduce the direct impact of the chopped wood chips on the inner knife holder 3 and extend the service life of the inner knife holder 3. The back knife plate 8 is fixed to the inner knife holder 3 by bolts, which is convenient for installation and disassembly. Since the back knife plate 8 is detachable, it can be replaced or maintained when needed. The angle design of the back knife plate 8 is crucial. Its angle ensures that the wood chips can move smoothly towards the chip discharge groove after being chopped, avoiding the accumulation and blockage of wood chips in the cutter head 1. During the chopping process, the wood chips will generate a certain impact force on the inner knife holder 3. The part of the back knife plate 8 extending beyond the inner knife holder 3 can effectively disperse and buffer these impact forces, protect the inner knife holder 3, reduce wear, and improve durability.

[0029] In a further embodiment, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, an adjustment plate 9 is detachably connected to the bottom of the outer knife holder 2. The flying knife blade 4 is arranged above the adjustment plate 9. By installing adjustment plates 9 with different thicknesses, the extension length of the flying knife blade 4 can be controlled, and the cutting effect of the whole device can be adjusted. The detachable design of the adjustment plate 9 makes it more convenient and fast to replace the flying knife blade 4. Without disassembling the whole outer knife holder 2, only the fixing bolts of the adjustment plate 9 need to be loosened, and the adjustment plate 9 with different thicknesses is replaced to adjust the extension length of the flying knife blade 4.

[0030] Furthermore, in an embodiment, please refer to Figure 2 、 Figure 3 and Figure 4 As shown, the included angle between the flying knife blade 4 and the upper horizontal plane of the cutter head 1 is α, and α is 30° - 45°. The included angle range of 30° - 45° for efficient cutting optimizes the transmission of the cutting force, enabling the flying knife blade 4 to exhibit efficient cutting performance during the cutting process. The evenly distributed cutting force reduces the wear of the flying knife blade 4, improves the durability of the blade, and reduces the replacement frequency. The appropriate included angle helps the smooth discharge of the wood chips, improves the chip discharge efficiency of the equipment, and reduces the risk of blockage. In this embodiment, the included angle between the flying knife blade 4 and the upper horizontal plane of the cutter head 1 being 38° provides the best cutting performance, enabling the flying knife blade 4 to exhibit efficient cutting ability during the cutting process. The evenly distributed cutting force reduces the wear of the flying knife blade 4, improves the durability of the blade, and reduces the replacement frequency.

[0031] In an embodiment, please refer to Figure 1 、 Figure 2 and Figure 3As shown, positioning blocks 21 are provided on both sides of the outer tool holder 2. The positioning blocks 21 on both sides are used to prevent the outer tool holder 2 from generating lateral displacement during operation, which can ensure that the outer tool holder 2 is stably fixed on the tool disc 1, avoiding the decline in cutting accuracy caused by lateral movement. By restricting the lateral displacement of the outer tool holder 2, the positioning blocks 21 can ensure that the flying cutter blade 4 always maintains a predetermined position and angle during cutting, improving the stability and consistency of cutting. The positioning blocks 21 are installed on both sides of the outer tool holder 2 by bolts or other fixing methods. During installation, it is necessary to ensure that the positioning blocks 21 are in close contact with the outer tool holder 2 to effectively restrict its lateral movement. During the chip cutting process, the lateral force received by the outer tool holder 2 will be offset by the positioning blocks 21, thereby maintaining the stability of the outer tool holder 2. The presence of the positioning blocks 21 ensures the stability of the outer tool holder 2 and the flying cutter blade 4, avoiding cutting errors caused by lateral movement.

[0032] In one embodiment, please refer to Figure 1 、 Figure 2 and Figure 3 As shown, a first wear-resistant plate 10 is detachably connected between the two positioning blocks 21. The first wear-resistant plate 10 is installed between the two positioning blocks 21, which can effectively improve the wear resistance of the positioning blocks 21 and their surrounding structures, extending the service life of the entire device. By adjusting the distance T between the flying cutter blade 4 and the first wear-resistant plate 10, the thickness of the cut wood chips can be precisely controlled. The larger the distance T, the longer the length of the cut wood chips. T controls the length of the cut wood chips. The larger T is, the longer the wood chips are; conversely, the smaller T is, the shorter the wood chips are.

[0033] In one embodiment, please refer to Figure 1 、 Figure 2 and Figure 3 As shown, a second wear-resistant plate 11 is also provided on the tool disc 1. The second wear-resistant plate 11 is installed on one side of the outer tool holder 2 to enhance the wear resistance of the outer tool holder 2. The second wear-resistant plate 11 can effectively withstand the friction and impact generated during cutting, reducing the wear of the outer tool holder 2. The presence of the second wear-resistant plate 11 protects the outer tool holder 2 and the tool disc 1 from direct friction and wear, extending the service life of the outer tool holder 2 and ensuring its long-term effective fixing and clamping function.

[0034] In one embodiment, please refer to Figure 3 、 Figure 4 and Figure 5, a sleeve 12 is also sleeved outside the rectangular spring 6. The sleeve 12 is arranged inside the cutter head 1. A fixing bolt 5 is movably connected inside the sleeve 12. When it is necessary to replace the flying cutter blade 4, loosen the tightening bolt 7 on the inner cutter holder 3. The inner cutter holder 3 deforms due to the rectangular spring 6 and pulls the fixing bolt 5 to move downward along the inside of the sleeve 12 under the action of the rectangular spring 6, thereby driving the whole inner cutter holder 3 to move downward by a certain distance, so that the distance between the inner cutter holder 3 and the outer cutter holder 2 increases, and the flying cutter blade 4 becomes loose, which is convenient for taking out and replacing. During the blade installation process, tighten the tightening bolt 7 on the inner cutter holder 3. The inner cutter holder 3 is compressed and deformed due to the rectangular spring 6 and pulls the fixing bolt 5 to move upward along the inside of the sleeve 12 under the action of the rectangular spring 6, thereby driving the whole inner cutter holder 3 to move upward by a certain distance, so that the distance between the inner cutter holder 3 and the outer cutter holder 2 decreases, which helps to ensure the tight fit between the inner cutter holder 3 and the outer cutter holder 2, thereby firmly clamping the flying cutter blade 4.

[0035] It should be noted that this application is not limited to the above embodiments. The above embodiments are only examples. Embodiments having the same structure and the same effect as the technical idea within the technical solution scope of this application are all included in the technical scope of this application. In addition, within the scope of not departing from the main idea of this application, various deformations that can be thought of by those skilled in the art are applied to the embodiments, and other ways constructed by combining some constituent elements in the embodiments are also included in the scope of this application.

Claims

1. A disc chipper fly cutter fixing device, comprising a cutter disc (1), wherein a plurality of grooves (111) are arranged above the cutter disc (1), characterized in that: An outer tool clamp (2) is provided on one side of the upper part of a plurality of the grooves (111), an inner tool clamp (3) is provided below the outer tool clamp (2), the inner tool clamp (3) is provided on the cutter disc (1), a flying knife blade (4) is clamped between the inner tool clamp (3) and the outer tool clamp (2), a plurality of fixing bolts (5) are provided at the bottom of the inner tool clamp (3), one end of a plurality of the fixing bolts (5) are fixedly connected to the inner tool clamp (3), one end of a plurality of the fixing bolts (5) are movably connected inside the cutter disc (1), a rectangular spring (6) is sleeved on a plurality of the fixing bolts (5), the rectangular spring (6) is provided inside the cutter disc (1), a plurality of tightening bolts (7) are provided at the bottom of the inner tool clamp (3), and the plurality of tightening bolts (7) are rotatably connected inside the cutter disc (1).

2. A disc chipper fly cutter fixing device according to claim 1, characterized in that: The upper part of the inner tool holder (3) is detachably connected with a back tool plate (8).

3. A disc chipper fly cutter fixing device according to claim 1, characterized in that: The bottom of the outer tool holder (2) is detachably connected to an adjustment plate (9), and the flying cutter blade (4) is arranged above the adjustment plate (9).

4. A disc chipper fly cutter fixing device according to claim 3, characterized in that: The included angle between the flying knife blade (4) and the upper horizontal plane of the cutter disc (1) is α, and α is 30° to 45°.

5. A disc chipper fly cutter fixing device according to claim 1, characterized in that: Positioning blocks (21) are provided on both sides of the outer tool holder (2).

6. A disc chipper fly cutter fixing device according to claim 5, characterized in that: A first wear-resistant plate (10) is detachably connected between the two positioning blocks (21).

7. A disc chipper fly cutter fixing device according to claim 1, characterized in that: The cutter disc (1) is also provided with a second wear-resistant plate (11).

8. A disc chipper fly cutter fixing device according to claim 1, characterized in that: The rectangular spring (6) is also sleeved with a sleeve (12), the sleeve (12) is arranged inside the cutter disc (1), and a fixing bolt (5) is movably connected inside the sleeve (12).

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