A crushing blade and a crusher

Abstract

The utility model relates to the equipment technical field of breaking material with cutter, specifically relates to a broken knife and breaker. Broken knife includes the cutter head with cutting edge and is used for fixing the cutter seat on cutter shaft, and the cutter seat is equipped with the mounting face, and the cutter head is fixed and installed on the mounting face of cutter seat through screw, and the mounting face of cutter seat includes two force receiving surfaces of angle, and the two force receiving surfaces are all towards the side of cutter seat in the direction of rotation when using broken knife, and the cutter head has the adaptive surface of fitting of two force receiving surfaces of angle of cutter seat, and the force receiving surface and adaptive surface are equipped with screw connection parts. Two force receiving surfaces of different inclination angles can adapt to bear the force in different directions in the process of rotation, and two angle force receiving surfaces can offset part of the force, which can reduce the shearing force on the screw, ensure the stability of the screw, reduce the risk of screw fracture caused by impact, and improve the use reliability.

Description

Technical Field

[0001] This utility model relates to the technical field of equipment for crushing materials with cutting tools, specifically to a crushing blade and a crusher. Background Technology

[0002] Currently, shear crushers are commonly used for crushing organic materials such as aggregates, hides, frozen meat, frozen fruit boards, and wood. A crusher mainly consists of a crushing chamber, a cutter shaft installed within the crushing chamber, and crushing blades mounted on the cutter shaft. The crushing blades rotate with the cutter shaft to crush the material.

[0003] Existing crushing blades, such as the replaceable-head animal crusher blade disclosed in Chinese utility model patent CN202179990U, include a roller cutter and a fixed cutter. The roller cutter comprises a roller head and a roller seat. The roller head is fixed to the front end of the roller seat by three sets of screws, and the roller seat is fixed to the roller shaft by double keys. The roller cutter is thus a crushing blade fixedly mounted on the cutter shaft. Its cutter head and cutter seat are manufactured separately, allowing the use of different materials and saving costs. The cutter head has an inclined, arc-shaped cutting edge, which can effectively grip the material.

[0004] In this type of split-type breaker, the cutter head is fixedly mounted on the cutter holder with screws. The cutter holder has a mounting surface for mounting the cutter head, and the mounting surface has threaded holes for screw fastening. The mounting surface is flat, and the corresponding mating surface of the cutter head is also flat. The screw axis is perpendicular to the mounting surface. During the rotation of the breaker, the direction of the force on the cutter head changes, and the screw is subjected to a large shear force. Under large impacts, it is prone to damage and breakage. Utility Model Content

[0005] The purpose of this utility model is to provide a crushing blade to solve the problem that the fastening screws connecting the blade head and the blade holder of the current split crushing blade are subject to large shearing forces and are prone to breakage; the purpose of this utility model is also to provide a crusher to solve the above problems.

[0006] The technical solution of the crushing blade of this utility model is: A crusher includes a blade head with a cutting edge and a blade holder for fixing to a blade shaft. The blade holder has a mounting surface, and the blade head is fixedly mounted on the mounting surface of the blade holder by screws. The mounting surface of the blade holder includes two load-bearing surfaces at an angle, both of which face the side of the blade holder facing the direction of rotation when the crusher is in use. The blade head has an adapter surface that is adapted to fit and engage with the two load-bearing surfaces at an angle to the blade holder. Screw connection portions are provided on the load-bearing surfaces and the adapter surface.

[0007] Furthermore, the included angle between the two load-bearing surfaces is less than 180°, making the mounting surface a concave structure.

[0008] Furthermore, when in use, the area of ​​the bearing surface farther from the cutter shaft is larger than the area of ​​the bearing surface closer to the cutter shaft.

[0009] Furthermore, the number of screws installed on the larger of the two load-bearing surfaces is greater than the number of screws installed on the smaller of the two load-bearing surfaces.

[0010] Furthermore, in use, the surface of the two bearing surfaces that is closer to the cutter shaft and extends radially along the cutter shaft, while the surface of the other bearing surface that is farther away from the cutter shaft intersects with the outer circumferential surface of the cutter shaft.

[0011] Furthermore, the mounting surface of the tool holder is provided with a positioning groove, and the adapter surface of the tool head is provided with a positioning protrusion for fitting into the positioning groove.

[0012] Furthermore, the positioning groove is located at the junction of the two load-bearing surfaces.

[0013] Furthermore, the groove of the positioning groove is a narrowed structure, the positioning groove runs through the thickness direction of the tool holder, and the positioning groove has a side opening on the side of the tool holder in the thickness direction for the positioning protrusion to be inserted.

[0014] Furthermore, the tool holder includes an inner welding surface for fitting and conforming to the outer peripheral surface of the tool shaft. The inner welding surface is provided with a welding groove, which extends through the thickness direction of the tool holder. The welding groove is filled with solder to form an inner weld seam by matching the part of the outer peripheral surface of the tool shaft that corresponds to the groove opening of the welding groove.

[0015] Beneficial Effects: This utility model modifies the elements of the existing split-type crusher, changing the mounting surface of the cutter head on the cutter holder to an angled surface. The two load-bearing surfaces form an angle, and the cutter head fits snugly onto the two angled load-bearing surfaces of the cutter holder. Screw connection points are provided on the load-bearing surfaces. After the cutter head is fixedly mounted on the cutter holder by screws, the cutter holder supports the cutter head. When the crusher is working, as it rotates, the cutter head cuts the material. The material exerts a reaction force on one side of the rotation direction, and the cutter head is subjected to force, which acts on the mounting surface of the cutter holder. Both angled load-bearing surfaces of the cutter holder mounting surface are subjected to pressure. The two load-bearing surfaces with different inclination angles can adapt to withstand forces in different directions during rotation. At the same time, the two angled load-bearing surfaces can offset some of the force, which can reduce the shear force acting on the screw, ensure the stability of the screw, reduce the risk of screw breakage due to impact, and improve the reliability of use.

[0016] The technical solution of the crusher of this utility model is: A crusher includes a cutter shaft and crushing blades welded and fixed to the cutter shaft. The crushing blades include a cutter head with a cutting edge and a cutter holder for fixing to the cutter shaft. The cutter holder has a mounting surface. The cutter head is fixedly mounted on the mounting surface of the cutter holder by screws. The mounting surface of the cutter holder includes two load-bearing surfaces at an angle, both of which face the side of the cutter holder facing the direction of rotation when the crusher is in use. The cutter head has an adapter surface that is adapted to fit and conform to the two load-bearing surfaces at an angle to the cutter holder. Screw connection portions are provided on the load-bearing surfaces and the adapter surface.

[0017] Furthermore, the included angle between the two load-bearing surfaces is less than 180°, making the mounting surface a concave structure.

[0018] Furthermore, when in use, the area of ​​the bearing surface farther from the cutter shaft is larger than the area of ​​the bearing surface closer to the cutter shaft.

[0019] Furthermore, the number of screws installed on the larger of the two load-bearing surfaces is greater than the number of screws installed on the smaller of the two load-bearing surfaces.

[0020] Furthermore, in use, the surface of the two bearing surfaces that is closer to the cutter shaft and extends radially along the cutter shaft, while the surface of the other bearing surface that is farther away from the cutter shaft intersects with the outer circumferential surface of the cutter shaft.

[0021] Furthermore, the mounting surface of the tool holder is provided with a positioning groove, and the adapter surface of the tool head is provided with a positioning protrusion for fitting into the positioning groove.

[0022] Furthermore, the positioning groove is located at the junction of the two load-bearing surfaces.

[0023] Furthermore, the groove of the positioning groove is a narrowed structure, the positioning groove runs through the thickness direction of the tool holder, and the positioning groove has a side opening on the side of the tool holder in the thickness direction for the positioning protrusion to be inserted.

[0024] Furthermore, the tool holder includes an inner welding surface for fitting and conforming to the outer peripheral surface of the tool shaft. The inner welding surface is provided with a welding groove, which extends through the thickness direction of the tool holder. The welding groove is filled with solder to form an inner weld seam by matching the part of the outer peripheral surface of the tool shaft that corresponds to the groove opening of the welding groove.

[0025] Beneficial Effects: This utility model modifies the elements of the existing split-type crusher, changing the mounting surface of the cutter head on the cutter holder to an angled surface. The two load-bearing surfaces form an angle, and the cutter head fits snugly onto the two angled load-bearing surfaces of the cutter holder. Screw connection points are provided on the load-bearing surfaces. After the cutter head is fixedly mounted on the cutter holder by screws, the cutter holder supports the cutter head. When the crusher is working, as it rotates, the cutter head cuts the material. The material exerts a reaction force on one side of the rotation direction, and the cutter head is subjected to force, which acts on the mounting surface of the cutter holder. Both angled load-bearing surfaces of the cutter holder mounting surface are subjected to pressure. The two load-bearing surfaces with different inclination angles can adapt to withstand forces in different directions during rotation. At the same time, the two angled load-bearing surfaces can offset some of the force, which can reduce the shear force acting on the screw, ensure the stability of the screw, reduce the risk of screw breakage due to impact, and improve the reliability of use. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the fixing structure of the crusher blade and the blade shaft in an embodiment of this utility model; Figure 2 for Figure 1 A side view of the breaker blade in the diagram; Figure 3 for Figure 1 A front view of the breaker blade in the diagram; Figure 4 for Figure 2 A side view of the tool holder; Figure 5 for Figure 2 A side view of the cutting head; Figure 6 for Figure 1 A schematic diagram of the force state of the crushing blade in the initial stage of crushing materials; Figure 7 for Figure 1 A schematic diagram of the stress state of the crushing blade in the middle stage of crushing the material; Figure 8 for Figure 1 A schematic diagram of the stress state of the crushing blade in the later stage of material crushing.

[0027] In the diagram: 1. Cutter shaft; 2. Cutter holder; 21. Welding groove; 22. Positioning groove; 23. Mating part; 24. Bevel; 3. Cutter head; 31. Positioning protrusion; 32. Staggered protrusion; 33. Alternating part; 4. Bolt. Detailed Implementation

[0028] The basic concept of this utility model of the crusher is to set the surface of the blade holder where the blade head is installed in an angled form. The load-bearing surfaces with different inclination angles can adapt to the different forces in different directions when the crusher rotates. At the same time, the angled surfaces can generate mutual cancellation of tangential forces after being subjected to force, which can improve the stress on the screw, reduce the risk of screw breakage, and improve the reliability of use.

[0029] The following detailed description is provided in conjunction with specific embodiments. Embodiments of the crushing blade of this utility model: like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the crushing blade in this embodiment is the moving blade of a shearing crusher, also known as a roller cutter. The roller cutter, in conjunction with the fixed blade, generates shearing force to crush the material. The crushing blade includes a blade holder 2 and a blade head 3. The crushing blade is fixed on a cutter shaft 1, and multiple crushing blades can be spaced apart along its axial direction on the cutter shaft 1. The cutter shaft 1 is a cylindrical structure and is rotatably mounted on the frame of the crusher. The frame has a crushing chamber. The crushing blade is fixed on the portion of the cutter shaft 1 located inside the crushing chamber, and the fixed blade is fixed on the inner wall of the crushing chamber. The material can enter the crushing chamber from the top for crushing and then be discharged from the bottom.

[0030] The shredder is a blade structure with a certain thickness. Its thickness direction is consistent with the axial direction of the cutter shaft 1, and its height direction is consistent with the radial direction of the cutter shaft 1, that is, the height relative to the outer circumference of the cutter shaft 1. Its length direction is consistent with the circumference of the cutter shaft 1. One end of the length direction has a blade tip and a cutting edge. The cutting edge can cooperate with the fixed blade to form a shearing force.

[0031] The breaker includes a blade head 3 with a cutting edge and a blade holder 2 for fixing to a breaker shaft 1. The blade holder 2 has a mounting surface, and the blade head 3 is fixedly mounted on the mounting surface of the blade holder 2 by screws, which can be bolts 4 or screws. The mounting surface of the blade holder 2 includes two load-bearing surfaces at an angle, both facing the side of the blade holder 2 that rotates during use. The blade head 3 has a mating surface that adapts to and fits against the two load-bearing surfaces of the blade holder 2 at an angle, with two angled surfaces that respectively abut against the two load-bearing surfaces. The load-bearing surfaces of the blade holder 2 and the mating surfaces of the blade head 3 are provided with screw connection points. The load-bearing surface of the blade holder 2 has a threaded hole, which is a blind hole. The blade head 3 has a through hole, which is a countersunk hole. The bolt 4 passes through the countersunk hole of the blade head 3 and is threaded into the threaded hole of the blade holder 2. The front of the blade head 3 facing away from the blade holder 2 is concave and forms a blade tip at the top. The bolt 4 does not protrude from the concave surface of the blade head 3.

[0032] The mounting surface of the cutter head 3 on the cutter holder 2 is set as an angled surface. After the cutter head 3 is fixedly mounted on the cutter holder 2 with bolts 4, the cutter holder 2 provides a stable support for the cutter head 3. When the crusher is working, as it rotates, the cutter head 3 cuts the material. The material exerts a reaction force on one side of the rotation direction. The cutter head 3 is subjected to force and acts on the mounting surface of the cutter holder 2. Both of the two angled bearing surfaces of the mounting surface of the cutter holder 2 are subjected to pressure. The two bearing surfaces with different inclination angles can adapt to withstand the forces in different directions during rotation. At the same time, the two angled bearing surfaces can cancel out part of the force, which can reduce the shear force acting on the screw, ensure the stability of the screw, reduce the risk of the screw breaking due to impact, and improve the reliability of use.

[0033] The mounting surface of the tool holder 2 is concave, and the included angle between its two load-bearing surfaces is less than 180°. Correspondingly, the included angle between the two surfaces of the tool head 3 is greater than 180°, making it a convex surface. This helps to ensure the strength of the tool head 3 and ensures reliable force bearing. In other embodiments, the concave surface can also be provided on the tool head, and the convex surface can be provided on the tool holder.

[0034] The tool holder 2 has two load-bearing surfaces, one relatively far from the tool shaft 1 and the other relatively close to it. In use, the area of ​​the load-bearing surface farther from the tool shaft 1 is larger than the area of ​​the load-bearing surface closer to it. The number of bolts 4 installed on the larger load-bearing surface is greater than the number of bolts 4 installed on the smaller load-bearing surface. In this embodiment, two bolts 4 are connected to the load-bearing surface farther from the tool shaft 1, and one bolt 4 is connected to the load-bearing surface closer to it. The axis of the bolt 4 is perpendicular to its respective load-bearing surface. This improves the stability of the part farther from the tool shaft 1, which is beneficial for the tool tip to withstand greater forces. In other embodiments, the areas of the two load-bearing surfaces can also be the same, and the number of bolts arranged on the two load-bearing surfaces can also be the same.

[0035] Both load-bearing surfaces of tool holder 2 intersect with the two sides of tool holder 2 in the thickness direction, and each load-bearing surface is a plane. Figure 1 As shown, both load-bearing surfaces are inclined relative to the plane passing through the tip of the cutter and the axis of the cutter shaft 1. In use, the surface of the load-bearing surface closer to the cutter shaft 1 extends radially along the cutter shaft 1, while the surface of the load-bearing surface farther from the cutter shaft 1 intersects the outer circumferential surface of the cutter shaft 1. The load-bearing surface extending radially along the cutter shaft 1 facilitates the bearing of the reaction force on the concave surface of the cutter head 3, while the load-bearing surface intersecting the outer circumferential surface of the cutter shaft 1 facilitates the bearing of the reaction force on the tip of the cutter head 3. This adapts to the force direction in different parts, which helps to enhance the robustness of the cutter head 3.

[0036] The mounting surface of the tool holder 2 is provided with a positioning groove 22, the opening of which faces the length direction of the tool holder 2. The mating surface of the tool head 3, which fits and mates with the mounting surface of the tool holder 2, is provided with a positioning protrusion 31. The positioning protrusion 31 is used to fit into the positioning groove 22, ensuring the relative position of the tool head 3 and the tool holder 2 and improving the installation stability. In other embodiments, the positioning groove and positioning protrusion may be omitted.

[0037] The positioning groove 22 is located at the junction of two angled surfaces, and correspondingly, the positioning protrusion 31 is located at the junction of two angled surfaces of the tool head mating surface. The positioning groove 22 has a structure with a narrow opening and a wide belly, and its opening is a constricted structure. The positioning protrusion 31 is adapted to the shape and size of the positioning groove 22. The positioning groove 22 runs through the thickness direction of the tool holder 2, forming openings on both sides. After the tool holder 2 is welded and fixed, the tool head 3 can be installed on the tool holder 2 from one side of the thickness direction. The positioning protrusion 31 is inserted from one side opening of the positioning groove 22. Then, the tool head 3 can be fixed together with the tool holder 2 with bolts 4, and it can be disassembled.

[0038] When the breaker is working, the force on the cutter head 3 will be transmitted to the two angled surfaces of the mounting surface of the cutter holder 2. The forces on the two angled surfaces can partially cancel each other out, reducing the shear force on the bolt 4. Moreover, the two angled surfaces can withstand forces in different directions, adapting to the change in the force direction of the cutter head 3 during the rotation of the breaker, and ensuring the stability of the cutter head 3.

[0039] Combination Figure 6 , Figure 7 , Figure 8 Define two angled surfaces of the cutter holder, surface A and surface B. When the cutter tip is subjected to force, surfaces A and B will eliminate the reaction force of the breaker from different directions, preventing concentrated lateral shear force between the cutter tip and the cutter holder, thus ensuring the strength and impact resistance of the cutter tip. Figure 6 As shown, in the initial stage of material crushing, the tip of the crusher is the main stress-bearing part, and the reaction force is concentrated in the vertical stress area of ​​surface B, while the vertical stress on surface A is smaller, mainly serving a clamping function. Figure 7 As shown, during the middle stage of material crushing, both the blade tip and the groove of the crusher are stress-bearing parts. The reaction force is distributed in the vertical stress range of surface A and surface B, and the vertical stress on surfaces A and B is relatively uniform. The lateral shear force at the blade tip is minimal. Figure 8 As shown, in the later stage of material crushing, the concave groove of the crusher blade is the main stress-bearing part. The reaction force is concentrated in the vertical stress area of ​​surface A, while the vertical stress on surface B is smaller and mainly plays a fastening role.

[0040] The breaker blade has an inner welding surface for fitting and conforming to the outer circumferential surface of the breaker shaft 1. A welding groove 21 is provided on the inner welding surface, extending through the thickness direction of the breaker blade to form two side openings along the axial direction of the breaker shaft 1. The side openings are located on the side surfaces of the breaker blade in the thickness direction. The welding groove 21 is filled with solder to form an inner weld seam by matching the corresponding opening of the welding groove 21 on the outer circumferential surface of the breaker shaft 1. Figure 1 The image shows that the welding groove 21 is not completely filled with solder; it should actually be filled as much as possible. After the inner welding surface of the breaker blade is in contact with the cutter shaft 1, solder can be filled into the welding groove 21 using the openings on both sides. Welding wire or welding rod can be used for surfacing, filling layer by layer. The molten metal solder combines with the groove wall surface of the welding groove 21 and the corresponding part of the outer peripheral surface of the cutter shaft 1 to form an inner weld. In this way, by using the welding groove 21 on the surface of the breaker blade that is in contact with the cutter shaft 1 to form a weld, the welding area can be increased, the welding position can be increased, and the structural strength can be improved. Using a weld that runs through the thickness of the breaker blade is also beneficial to improving the load-bearing performance.

[0041] The groove of the welding groove 21 has a narrow opening, making it wider at the bottom than at the top. The groove wall of the welding groove 21 includes two opposite sides of the narrow opening, which form an included angle and contact the outer circumferential surface of the cutter shaft 1 when they are engaged. The two inclined sides of the narrow opening and the outer circumferential surface of the cutter shaft 1 form a wide opening structure facing the bottom of the welding groove 21, avoiding the formation of a narrow slit and allowing the molten metal of the solder to fully enter the joint, thereby improving the welding strength and welding quality.

[0042] The wall surface of the welding groove 21 also includes two parallel and opposite sides, which are connected to the two opposite inclined sides of the constriction structure. The two parallel and opposite sides and the two inclined sides of the constriction part are connected one-to-one to form the two opposite side walls of the welding groove 21 along its width direction, so that the welding groove 21 has a large groove depth, which facilitates the filling of welding wire or welding rod and improves the weld strength.

[0043] The bottom surface of the welding groove 21 is curved and smoothly connects to the two parallel and opposite sides, facilitating the filling of the groove space with weld metal and improving welding quality. Multiple welding grooves 21 are distributed along the length of the crusher blade. When the crusher blade and the cutter shaft 1 are engaged, each welding groove 21 is spaced circumferentially along the cutter shaft 1. The weld formed by multiple welding grooves 21 can distribute the load and improve structural strength. The height of the crusher blade relative to the outer circumference of the cutter shaft 1 gradually decreases from the tip along the circumference of the cutter shaft 1. Each welding groove 21 has two depths; there is one shallower welding groove 21, located at the lower height of the crusher blade, which allows for full utilization of the crusher blade's length to arrange more internal welds.

[0044] The breaker has a side welding surface in the thickness direction. The side welding surface is used to cooperate with the outer peripheral surface of the cutter shaft 1 to form a fillet weld. There are fillet welds on both sides in the thickness direction. After the fillet welds are formed, they are connected to the inner welds at the welding groove 21. The length of the fillet weld on one side is sufficient to connect with each inner weld, which can improve the welding strength.

[0045] The inner surface of the tool holder 2, which is used to adapt to the outer circumference of the tool shaft 1, forms an inner welding surface. A welding groove 21 is provided on the tool holder 2. The side surface along the thickness direction of the tool holder 2 forms a side welding surface. Both the inner and outer surfaces are curved surfaces with different curvatures. The tool head 3 is installed at the end of the tool holder 2 with a greater height than the tool holder 2. The thickness of the tool head 3 is the same as the thickness of the tool holder 2. The tool head 3 and the tool holder 2 can be made of different materials according to performance requirements, saving costs. The tool head 3 can be disassembled separately from the tool holder 2 for easy replacement and improved maintenance efficiency.

[0046] The mounting surface of the tool holder 2 is the end face with the greater height. The inner edge of the mounting surface has a bevel 24 for welding to the outer circumference of the tool shaft 1. Before installing the tool head 3, the tool holder 2 is welded and fixed to the tool shaft 1. In addition to forming an inner weld at the welding groove 21 and a side fillet weld, a weld is also formed at the bevel 24. This weld can connect with the side fillet weld, improving the welding fixation strength. The tool head 3 has a clearance part 33 for avoiding interference with the weld at the inner edge of the mounting surface of the tool holder 2. The clearance part 33 is formed by a notch, avoiding interference with the weld at the bevel 24 and ensuring a good fit between the tool head 3 and the tool holder 2.

[0047] The top of the cutter head 3 is its outer end away from the cutter shaft 1, and its inner end is its bottom end that connects to the cutter shaft 1. The bottom surface of the cutter head fits and adheres to the outer circumferential surface of the cutter shaft. The front of the cutter head 3 faces away from the cutter holder 2 and is generally a concave arc surface, which facilitates material clamping. The back of the cutter head 3 forms a mating surface for mounting onto the cutter holder 2. The top of the back of the cutter head 3 is provided with a staggered protrusion 32. The dimension of the staggered protrusion 32 along the axial direction of the cutter shaft 1 is the same as the thickness of the cutter head 3. The top of the mounting surface of the cutter holder 2 is provided with a mating part 23 that is adapted to the staggered protrusion 32. The mating part 23 is formed by a notch. After the cutter head 3 is installed on the cutter holder 2, the staggered protrusion 32 corresponds to the mating part 23. The staggered protrusion 32 ensures that the top surface of the cutter head 3 and the top surface of the cutter holder 2 are smoothly connected. The gap formed by the staggered protrusion 32 and the mating part 23 on the top surface of the crusher is staggered from the gap formed by the mounting surface of the cutter holder 2 and the main body of the mating surface of the cutter head 3. The position and orientation of the joint between the cutter head 3 and the cutter holder 2 are changed by the staggered protrusion 32 and the mating part 23. The staggered protrusion 32 can cover the gap at the bolt 4 mounting part, so that foreign objects are not easily stuck in the gap between the cutter tip and the cutter holder 2. The surfaces of the staggered protrusion 32 and the mating part 23 that are in contact are two surfaces that form an angle. The angled surface of the mating part 23 makes it a concave part. The surfaces in the two directions abut and fit together, which makes it easier to adapt to changes in the force direction of the cutter head and increases the resistance to foreign objects entering.

[0048] This crusher is mainly used in single and twin-shaft crushers. It is driven by a motor and a reducer, which in turn drives the cutter shaft to crush materials. The blade tooth length (processing radius), blade thickness, and shaft diameter of the matching cutter shaft are adjustable. It can be applied to various single and twin-shaft crushers and twin-shaft shredders, and is suitable for processing various organic materials with different output sizes.

[0049] Due to its split design, the cutter head 3 can be made of a material with high hardness, high toughness, and good wear resistance after quenching. This type of material is usually not suitable for welding, as excessive stress during the welding process can easily cause cracks. On the other hand, the cutter holder 2 can be made of a material suitable for welding. This ensures both the mechanical hardness, toughness, and wear resistance of the cutter head 3 and the strength of the weld.

[0050] The number of welding grooves 21 on the cutter holder 2 of the crusher can be adjusted according to the blade length to ensure the strength of the weld. Simultaneously, the depth of the welding grooves 21 can also be adjusted according to the size of the welding rod, facilitating the welding operation. After the cutter head 3 wears down from prolonged use, simply remove the bolts 4 securing the cutter head 3 to replace it with a new one. The replacement process can be completed in just a few minutes, significantly reducing maintenance and replacement time and costs. The number and distribution of blades on a single crusher's cutter shaft can be flexibly designed, enabling the crusher to have more flexible raw material adaptability and a wider range of crushing processes. This crusher effectively improves production efficiency, reduces maintenance and replacement costs, and is reliable in use.

[0051] Embodiments of the crusher of this utility model: The crusher includes a cutter shaft and crushing blades fixed on the cutter shaft. The crushing blades are the same as those described in the above embodiments, and will not be repeated here.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A crushing blade, characterized in that, The device includes a blade head with a cutting edge and a blade holder for fixing it to a cutter shaft. The blade holder has a mounting surface, and the blade head is fixedly mounted on the mounting surface of the blade holder by screws. The mounting surface of the blade holder includes two load-bearing surfaces at an angle, both of which face the side of the blade holder that rotates when the crusher is in use. The blade head has a fitting surface that is adapted to fit and engage with the two load-bearing surfaces at an angle to the blade holder. Screw connection portions are provided on the load-bearing surfaces and the fitting surface.

2. The crushing blade according to claim 1, characterized in that, The angle between the two load-bearing surfaces is less than 180°, making the mounting surface a concave structure.

3. The crushing blade according to claim 1 or 2, characterized in that, When in use, the area of ​​the bearing surface farther from the cutter shaft is larger than the area of ​​the bearing surface closer to the cutter shaft.

4. The crushing blade according to claim 3, characterized in that, The number of screws installed on the larger of the two load-bearing surfaces is greater than the number of screws installed on the smaller of the two load-bearing surfaces.

5. The crushing blade according to claim 1 or 2, characterized in that, When in use, the surface of the two load-bearing surfaces that is closer to the cutter shaft extends radially along the cutter shaft, while the surface of the other load-bearing surface that is farther away from the cutter shaft intersects with the outer circumferential surface of the cutter shaft.

6. The crushing blade according to claim 1 or 2, characterized in that, The mounting surface of the tool holder is provided with a positioning groove, and the adapter surface of the tool tip is provided with a positioning protrusion for fitting into the positioning groove.

7. The crushing blade according to claim 6, characterized in that, The positioning groove is located at the junction of the two load-bearing surfaces.

8. The crushing blade according to claim 6, characterized in that, The locating groove has a narrow opening and extends through the thickness of the tool holder. The locating groove has a side opening on the side of the tool holder in the thickness direction for the locating protrusion to be inserted.

9. The crushing blade according to claim 1 or 2, characterized in that, The tool holder includes an inner welding surface for fitting and conforming to the outer peripheral surface of the tool shaft. The inner welding surface is provided with a welding groove that extends through the thickness direction of the tool holder. The welding groove is filled with solder to form an inner weld seam by matching the part of the outer peripheral surface of the tool shaft that corresponds to the groove opening of the welding groove.

10. A crusher, characterized in that, The tool includes a cutter shaft and a crushing blade as described in any one of claims 1-9, which is welded and fixed to the cutter shaft.

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