Crushing blades for pulverizers

Abstract

This utility model belongs to the field of crusher technology and discloses a crushing tool for a crusher, including a cutting blade, a pineapple blade, and a splined shaft. Multiple cutting blades and multiple pineapple blades are alternately installed around the splined shaft along its axial direction. The splined shaft rotates synchronously with the cutting blades and pineapple blades. The cutting blades have bidirectional cutting edges at both ends. The pineapple blade includes a body, and multiple cutting teeth are arranged along its axial direction on the outer circumference of the body. There is a tooth gap between adjacent teeth, and each cutting tooth has a staggered angle along the circumferential direction of the body. By setting the cutting blade to bidirectional cutting edges at both ends, the bidirectional cutting edges can adapt to both forward and reverse rotation cutting. By driving the cutting blade to reverse, the reverse cutting edge of the cutting blade cuts through stuck material, thereby greatly reducing the need for manual material removal and thus reducing the possibility of accidental injury during manual material removal.

Description

Technical Field

[0001] This utility model relates to the field of crusher technology, and in particular to a crushing blade for a crusher. Background Technology

[0002] During the injection molding process, gate waste is inevitably generated at the gate of the injection molding machine. This gate waste is usually crushed by a shredder and cut into small particles for easy recycling.

[0003] Existing pulverizer blades use unidirectional double-edged blades. When material jamming occurs, the machine must be stopped and the operator must clear the jam, which is time-consuming and labor-intensive. Pineapple blades use blades with staggered angles, which have certain advantages in pulverizing efficiency. However, they still suffer from frequent jamming, poor pulverizing effect, and unstable power transmission.

[0004] Therefore, there is an urgent need to design a new type of crushing blade for crushers to improve the above-mentioned problems. Utility Model Content

[0005] The purpose of this utility model is to provide a crushing blade for a crusher, so as to solve the technical problems of frequent material jamming, poor crushing effect and unstable power transmission of existing crushing blades.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The present invention provides a pulverizing tool for a pulverizer, including a cutting blade, a pineapple blade, and a splined shaft;

[0008] Multiple cutting blades and multiple pineapple blades are provided, and multiple cutting blades and multiple pineapple blades are alternately installed on the periphery of the spline shaft along the axial direction of the spline shaft. The spline shaft rotates synchronously with the cutting blades and the pineapple blades.

[0009] The cutting blade is provided with bidirectional cutting edges at both ends, which are used for forward cutting when rotating forward or reverse cutting when rotating backward.

[0010] The pineapple knife includes a body, and a plurality of cutting teeth are arranged on the outer periphery of the body along its axial direction. There is a tooth gap between adjacent cutting teeth, and each cutting tooth has a staggered angle along the circumferential direction of the body.

[0011] Efficient power transmission is achieved through the multi-tooth meshing of the splined shaft. The splined shaft has strong bending and torsional resistance, can withstand large torques, has good stability, and exhibits minimal misalignment and vibration between components, resulting in higher rotational synchronization. The two ends of the cutting blade are designed with bidirectional cutting edges, adapting to both forward and reverse rotation. Reverse rotation effectively solves the problem of material jamming, ensuring continuous equipment operation and reducing the probability of downtime. Compared to unidirectional cutting edges, where jammed material requires manual removal by the operator, this embodiment drives the cutting blade to reverse, using the reverse cutting edge to cut the jammed material, thus greatly reducing manual removal and minimizing the possibility of accidental injury during manual removal. The staggered angle between the teeth of the pineapple blade concentrates the crushing force, significantly enhancing crushing capacity and improving crushing efficiency.

[0012] As a preferred embodiment of the crushing blade for a crusher, each end of the cutting blade is provided with at least three first cutting edges.

[0013] The three primary cutting edges cut the material in at least three stages, reducing the amount of material cut by the cutting blade in a single operation, increasing pressure, reducing the load on the crushing blades and drive unit, and extending the service life of the crusher.

[0014] As a preferred embodiment of the shredding blade used in a shredder, the cutting edge has a pointed tooth structure.

[0015] The sharp, toothed structure allows for more precise cutting into materials. The rotation and pulling between the teeth enables efficient crushing, while also effectively preventing material entanglement and reducing the failure rate.

[0016] As a preferred embodiment of the shredding blades used in a shredder, each of the first cutting edges is provided with a groove to form a second cutting edge.

[0017] By adding a second cutting edge to the first cutting edge, when crushing rod-shaped material, the first cutting edge will contact the material first and form a huge shearing force with the box body to cut off one side of the rod-shaped material. At this time, the second cutting edge will contact the other side of the rod-shaped material and cut it off a second time with the box body. In this embodiment, the nodes of the two cutting are staggered, which can concentrate the pressure on a single cutting operation and obtain a stronger cutting ability without sacrificing efficiency.

[0018] As a preferred embodiment of the shredding blades used in a shredder, the length directions of two adjacent cutting blades are arranged at an angle to each other in the circumferential direction of the spline shaft.

[0019] This ensures that the material can be effectively cut and pulverized by the pineapple blades between adjacent cutting blades.

[0020] As a preferred embodiment of the shredding blades used in a shredder, the splined shaft has eight splines, and the included angle between two adjacent cutting blades in the circumferential direction of the splined shaft is a multiple of 22.5°.

[0021] As a preferred embodiment of the crushing blades used in a crusher, each of the blades is provided with multiple cutting edges on its circumference.

[0022] The blade teeth are made of stainless steel, for example, 45NCD16, with a hardness of 55HRC-57HRC. They are corrosion-resistant, durable, and rust-resistant. The blade is sharp and strong, maintaining stable cutting performance over a long period.

[0023] As a preferred option for crushing blades used in a crusher, the pineapple blade is manufactured in a single piece.

[0024] One-piece molding offers better overall integrity, higher strength, and a longer service life.

[0025] As a preferred embodiment of the crushing blades used in a crusher, the cutting blade has a first connecting hole in its axial direction that is adapted to the splined shaft, and the pineapple blade has a second connecting hole in its axial direction that is adapted to the splined shaft.

[0026] The first connecting hole allows the cutting blade to be stably mounted on the splined shaft, and the second connecting hole also allows the pineapple blade to be stably mounted on the splined shaft, resulting in a tight fit and high precision.

[0027] As a preferred embodiment of the pulverizing blades for a pulverizer, the pulverizing blades for the pulverizer further include:

[0028] A drive device, the output end of which is connected to the spline shaft, is used to drive the spline shaft to rotate.

[0029] The drive unit drives the spline shaft to rotate, which in turn drives the cutting blade and pineapple blade mounted on the spline shaft to rotate synchronously.

[0030] The beneficial effects of this utility model are:

[0031] Efficient power transmission is achieved through the multi-tooth meshing of the splined shaft. The splined shaft has strong bending and torsional resistance, can withstand large torques, has good stability, and exhibits minimal misalignment and vibration between components, resulting in higher rotational synchronization. Identical cutting tools can achieve a staggered angle simply by misaligning the splined teeth of the splined shaft during installation, without additional machining. The two ends of the cutting blade are designed with bidirectional cutting edges, adapting to both forward and reverse rotation. Reverse rotation effectively solves the problem of material jamming, ensuring continuous equipment operation and reducing the probability of downtime. Compared to unidirectional cutting edges, where jammed material requires manual removal by the operator, this embodiment drives the cutting blade to reverse, using the reverse cutting edge to cut the jammed material, greatly reducing manual removal and thus lowering the possibility of accidental injury during manual removal. The staggered angle between the blade teeth of the pineapple blade concentrates the crushing force, significantly enhancing crushing capacity and improving crushing efficiency. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the crushing blade of the crusher provided in this embodiment of the utility model;

[0033] Figure 2 This is a front view structural diagram of the crushing blade of the crusher provided in this embodiment of the utility model;

[0034] Figure 3 This is a schematic diagram of the structure of the cutting blade provided in this embodiment of the utility model;

[0035] Figure 4 This is a schematic diagram of the structure of the pineapple knife provided in this embodiment of the utility model;

[0036] Figure 5 This is a front view of the pineapple knife provided in this embodiment of the utility model.

[0037] In the picture:

[0038] 1. Cutting blade; 11. Double-sided cutting edge; 111. First cutting edge; 112. Second cutting edge; 101. First connecting hole;

[0039] 2. Pineapple knife; 21. Body; 22. Teeth; 23. Tooth gap; 24. Blade; 201. Second connecting hole;

[0040] 3. Spline shaft. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0045] Existing pulverizer blades use unidirectional double-edged blades. When material jamming occurs, the machine must be stopped and the operator must clear the jam, which is time-consuming and labor-intensive. Pineapple blades use blades with staggered angles, which have certain advantages in pulverizing efficiency. However, they still suffer from frequent jamming, poor pulverizing effect, and unstable power transmission.

[0046] To solve the above problems, combined with Figures 1-5 As shown in the figure, the crushing blades for the crusher provided in this embodiment include a cutting blade 1, a pineapple blade 2, and a splined shaft 3.

[0047] like Figure 1 As shown, multiple cutting blades 1 and multiple pineapple blades 2 are provided, and multiple cutting blades 1 and multiple pineapple blades 2 are alternately installed on the periphery of the spline shaft 3 along the axial direction of the spline shaft 3.

[0048] For example, in this embodiment, there are two cutting blades 1 and three pineapple blades 2. The two cutting blades 1 and the three pineapple blades 2 are alternately installed around the spline shaft 3 along the axial direction of the spline shaft 3. The spline shaft 3 rotates synchronously with the cutting blades 1 and the pineapple blades 2.

[0049] Specifically, the splined shaft 3 has eight splines, each extending along its axial direction and evenly spaced along the circumferential direction. The cutting blade 1 has a first connecting hole 101 axially provided to mate with the splined shaft 3 (see...). Figure 3 The pineapple cutter 2 has a second connecting hole 201 on its axial direction that is adapted to the spline shaft 3 (see...). Figure 4 and Figure 5 The cutting blade 1 can be stably mounted on the splined shaft 3 through the first connecting hole 101, and the pineapple blade 2 can also be stably mounted on the splined shaft 3 through the second connecting hole 201. The installation fits tightly and with high precision.

[0050] In other embodiments, the splined shaft 3 can also be a flat key, a semi-circular key, a wedge key, etc. The reason why the splined shaft 3 is used in this embodiment is that the multi-tooth meshing of the splined shaft 3 can achieve efficient power transmission. The splined shaft 3 has strong bending strength and torsional resistance, can withstand large torque, enhances the stability of power transmission, and has less misalignment and vibration between components, higher rotational synchronization, and ensures the reliability of long-term stable operation.

[0051] Furthermore, the crushing blades used in the crusher also include a drive device (not shown in the figure). The output end of the drive device is connected to the splined shaft 3, and the drive device is used to drive the splined shaft 3 to rotate. By driving the splined shaft 3 to rotate, the cutting blade 1 and the pineapple blade 2 mounted on the splined shaft 3 are driven to rotate synchronously.

[0052] Specifically, the drive unit includes a reducer and a motor. The splined shaft 3 is connected to the motor through the reducer. The motor serves as a power source to provide rotational power to the splined shaft 3. The reducer is provided to achieve stable power transmission.

[0053] like Figure 2 and Figure 3As shown, the cutting blade 1 has bidirectional cutting edges 11 at both ends. The bidirectional cutting edges 11 are used for forward cutting when rotating forward or reverse cutting when rotating backward. By setting the two ends of the cutting blade 1 to bidirectional cutting edges 11, the bidirectional cutting edges 11 can adapt to both forward and reverse rotation cutting. Reverse rotation can effectively solve the problem of material jamming, ensure continuous operation of the equipment, and reduce the probability of downtime. Compared with a unidirectional cutting edge, when material jamming occurs, the operator must manually clear the jammed material. In this embodiment, by driving the cutting blade to reverse, the reverse cutting edge of the cutting blade is used to cut off the jammed material, thereby greatly reducing the need for manual material clearing and thus reducing the possibility of accidental injury during manual material clearing.

[0054] Specifically, each end of the cutting blade 1 has at least three first cutting edges 111 on its bidirectional cutting edge 11. The three first cutting edges 111 cut the material in at least three stages, reducing the amount of material cut by the cutting blade 1 in a single cut, increasing the pressure, reducing the load on the crushing blade and the drive device, and extending the service life of the crusher.

[0055] In some embodiments, there may be four, five or more first cutting edges 111. Increasing the number of first cutting edges 111 can further disperse the amount of material cut at one time and reduce the cutting torque. This embodiment does not specifically limit the number of cutting edges 111; it can be set according to the requirements.

[0056] The shape of the cutting blade 1 can also be changed from a straight line to a curved or serrated shape to enhance cutting ability and achieve the same goal of efficient cutting and reduced jamming risk.

[0057] The cutting edge has a serrated structure. This serrated structure is sharp and can cut into the material more precisely. The rotation and pulling between the serrations completes the efficient crushing, and can also effectively prevent material entanglement and reduce the failure rate.

[0058] Furthermore, each of the first cutting edges 111 is provided with a groove to form a second cutting edge 112. By adding a second cutting edge 112 to the first cutting edge 111, when crushing rod-shaped material, the first cutting edge 111 will first contact the material and cooperate with the box to form a huge shearing force, cutting off one side of the rod-shaped material first. At this time, the second cutting edge 112 will contact the other side of the rod-shaped material and cooperate with the box to cut it off a second time. In this embodiment, the nodes of the two cutting operations are staggered, which can concentrate the pressure on a single cutting operation and obtain stronger cutting ability without sacrificing efficiency.

[0059] To ensure effective cutting of materials, such as Figure 2As shown, the splined shaft has eight splines, and the length directions of two adjacent cutting blades 1 are set at an angle to each other in the circumferential direction of the splined shaft 3. This ensures that the material can be effectively cut and pulverized by the pineapple blades 2 between adjacent cutting blades 1. Furthermore, the angle between two adjacent cutting blades 1 in the circumferential direction of the splined shaft 3 is a multiple of 22.5°, with the specific angle value depending on the number of splines on the splined shaft.

[0060] like Figure 4 and Figure 5 As shown, the pineapple cutter 2 includes a body 21. Multiple cutting teeth 22 are arranged along the axial direction of the outer periphery of the body 21. The cutting teeth 22 are made of stainless steel, which is corrosion-resistant, durable, and rust-resistant. There is a tooth gap 23 between adjacent cutting teeth 22. Each cutting tooth 22 has a staggered angle along the circumferential direction of the body 21. Multiple cutting edges 24 are arranged on the circumference of each cutting tooth 22. The cutting edges 24 are sharp and strong, maintaining stable cutting performance over a long period. The staggered angle between the cutting teeth 22 of the pineapple cutter 2 concentrates the crushing force, greatly enhancing the crushing capacity and improving crushing efficiency.

[0061] For example, the pineapple cutter 2 has 8 teeth 22, the width of the teeth 22 is 5mm, the gap between the teeth 23 is 4.5mm, and each tooth 22 has 12 blades 24, which can cut the material into particles smaller than 5mm, and the crushing effect is good.

[0062] In some embodiments, the width, tooth spacing, and number of the cutting teeth 22 can be adaptively adjusted according to actual conditions. For example, the width of the cutting teeth 22 can be changed to 5.5mm or 6mm, the tooth spacing 23 can be changed to 4mm, 5mm, 5.5mm, etc., and the number of cutting teeth 22 can be changed to 8, 9, 10, 11, 13, or 14, etc.

[0063] In addition, by maintaining the phase-angle design and changing the size parameters to adapt to different pulverization needs, the pulverization effect is improved and the pulverization efficiency is increased.

[0064] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A comminution cutter for a comminution mill, characterised in that, Includes a cutting blade (1), a pineapple blade (2), and a splined shaft (3); Multiple cutting blades (1) and multiple pineapple blades (2) are provided respectively. Multiple cutting blades (1) and multiple pineapple blades (2) are alternately installed on the periphery of the spline shaft (3) along the axial direction of the spline shaft (3). The spline shaft (3) rotates synchronously with the cutting blades (1) and the pineapple blades (2). The cutting blade (1) is provided with bidirectional cutting edges (11) at both ends. The bidirectional cutting edges (11) are used for forward cutting when rotating forward or reverse cutting when rotating backward. The pineapple knife (2) includes a body (21), and a plurality of blades (22) are provided on the outer periphery of the body (21) along its axial direction. There is a tooth gap (23) between adjacent blades (22), and each blade (22) has a staggered angle along the circumferential direction of the body (21).

2. The pulverizing blade for a pulverizer according to claim 1, characterized by, The bidirectional cutting edge (11) at each end of the cutting blade (1) is provided with at least three first cutting edges (111).

3. The crushing blade for a crusher according to claim 2, characterized in that, The cutting edge has a pointed tooth structure.

4. The pulverizing blade for a pulverizer according to claim 2, characterized in that, Each of the first cutting edges (111) has a groove on its edge to form a second cutting edge (112).

5. The pulverizing blade for a pulverizer according to claim 1, characterized in that, The length directions of two adjacent cutting blades (1) are set at an angle to the circumferential direction of the spline shaft (3).

6. The pulverizing blade for a pulverizer according to claim 5, characterized in that, The spline shaft has eight splines, and the included angle between two adjacent cutting blades (1) in the circumferential direction of the spline shaft (3) is a multiple of 22.5°.

7. The pulverizing blade for a pulverizer according to claim 1, characterized in that, Each of the aforementioned cutting teeth (22) has multiple cutting edges (24) on its periphery.

8. The pulverizing blade for a pulverizer according to claim 1, characterized in that, The pineapple knife (2) is made by one-piece molding.

9. The pulverizing blade for a pulverizer according to claim 1, characterized in that, The cutting blade (1) has a first connecting hole (101) adapted to the spline shaft (3) in the axial direction, and the pineapple blade (2) has a second connecting hole (201) adapted to the spline shaft (3) in the axial direction.

10. The pulverizing blade for a pulverizer according to any one of claims 1-9, characterized in that, The pulverizing blades for the pulverizer also include: A driving device, the output end of which is connected to the spline shaft (3) and is used to drive the spline shaft (3) to rotate.

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