Layered main shaft for crusher

Abstract

The utility model discloses a layered main shaft for a crusher, which comprises an inner-layer main shaft, a cutter mounting component and an outer-layer shell, and a groove base mounting position is arranged on the surface of the inner-layer main shaft; the cutter mounting assembly is arranged at the groove base mounting position and comprises a groove base and a cutter mounting seat, the groove base is mounted at the groove base mounting position, and the cutter mounting seat is mounted in a mounting groove of the groove base; the outer layer shell is fixedly arranged on the periphery of the inner layer main shaft in a sleeving mode, and an avoiding hole is formed in the position, corresponding to the cutter installation assembly, of the outer layer shell. By the adoption of the structure, machining of the inner-layer main shaft is facilitated, and the production cost of the inner-layer main shaft is reduced; besides, different groove bases can be mounted, so that the inner-layer spindle can be suitable for mounting different cutters and cutter mounting seats, the range of mounting different cutters and / or cutter mounting seats on the layered spindle is expanded, an enterprise does not need to reserve inner-layer spindle blanks of various specifications, and the production cost of the enterprise is reduced.

Description

Technical Field

[0001] This utility model relates to the field of solid waste crushing equipment, and in particular to a layered main shaft for a crusher. Background Technology

[0002] With social development and continuous advancements in science and technology, the amount of solid waste generated in daily life and production is increasing. To protect the environment and conserve resources, many industries are now recycling or reprocessing solid waste with recycling value. Some companies crush solid waste with combustion value to produce fuel. Commonly used crushers for solid waste include single-shaft crushers, double-shaft crushers, and multi-shaft crushers. Single-shaft crushers feature a spindle design with quick-change cutters. The spindle of a single-shaft crusher typically has the following structure: a cylindrical spindle with V-shaped or rectangular grooves machined on its outer circumference for mounting cutters and cutter mounts. The cutter mounts are welded to the inside of these grooves, and the cutters are then bolted onto the mounts.

[0003] While the aforementioned crusher spindle can meet the production needs of enterprises, its generally large size and heavy weight result in high overall material costs for machining. Furthermore, various specifications of spindle blanks need to be stocked to accommodate different tool mounting bases. Additionally, the spindle is typically made of high-strength alloy materials, requiring multi-axis machine tools to machine the V-shaped or rectangular grooves for mounting tools and tool mounting bases on its outer surface. This process is difficult and involves a large amount of machining, leading to time-consuming and labor-intensive production of the spindle, thus placing significant pressure on the enterprise's production costs.

[0004] Furthermore, during operation, the blades and blade mounts of a single-shaft crusher repeatedly cut or collide with materials. After a period of use, the blades or blade mounts are prone to wear and need replacement. However, because the single shaft is made of high-strength alloy material, its welding performance is poor, making it inconvenient to weld and replace the blades or blade mounts, and hindering the later maintenance of the main shaft. Additionally, when the crusher is used to crush materials such as plastics, the main shaft experiences repeated friction, causing the main shaft temperature to rise, which can easily damage the bearings supporting the main shaft and also lead to plastic deformation of the plastic. Utility Model Content

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention provides a layered spindle for a crusher, which not only reduces the production cost of the layered spindle but also allows for the installation of different types of grooved bases to accommodate different tool mounts, thus expanding the range of applications for layered spindles that can accommodate different tools and / or tool mounts.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A layered main shaft for a crusher includes an inner main shaft, a cutter mounting assembly, and an outer housing. The inner main shaft is elongated and has a grooved base mounting position on its outer surface. The cutter mounting assembly is disposed at the grooved base mounting position and includes a grooved base and a cutter mounting seat. The grooved base is mounted at the grooved base mounting position, and a mounting groove is formed on the side of the grooved base away from the grooved base mounting position. The cutter mounting seat is mounted in the mounting groove. The outer housing is hollow and is fitted around the outer periphery of the inner main shaft and is fixedly connected to the inner main shaft. A clearance hole is formed at a position on the outer housing corresponding to the cutter mounting assembly.

[0008] One of the beneficial effects of certain embodiments of this utility model on a layered main shaft for a crusher:

[0009] The layered spindle in this embodiment adopts a structure composed of an inner spindle, a tool mounting assembly, and an outer housing. Therefore, only the grooved base mounting position needs to be machined on the outer surface of the inner spindle. Then, the grooved base of the tool mounting assembly is fixed to the grooved base mounting position, and then the tool mounting seat is fixedly installed in the mounting groove of the grooved base. At the same time, the outer housing is correspondingly sleeved on the outer periphery of the inner spindle and fixedly connected to the inner spindle. After that, the tool can be installed and used normally. By adopting the above structure, the inner spindle only needs to be machined at the grooved base mounting position, eliminating the need for traditional multi-axis machine tools to machine mounting grooves for tool and / or tool mount on the spindle, thus greatly reducing the machining cost of the inner spindle. In addition, depending on the tool or tool mount being installed, grooved bases of different shapes and structures can be manufactured and then installed at the grooved base mounting position of the inner spindle. This allows the inner spindle to be used for mounting different tools and tool mounts, expanding the range of applicable tools and / or tool mounts for the layered spindle. At the same time, enterprises do not need to stock multiple specifications of inner spindle blanks, which helps to reduce the production and operating costs of enterprises.

[0010] In some embodiments of this utility model, the grooved base is welded and fixed to the grooved base mounting position of the inner spindle.

[0011] In some embodiments of this utility model, the inner spindle is cylindrical and hollow inside. A first positioning structure is provided between the grooved base and the inner spindle. The first positioning structure includes a first positioning mounting hole, a second positioning mounting hole, and a first locking bolt. The first positioning mounting hole is arranged in the grooved base mounting position along the radial direction of the inner spindle. The second positioning mounting hole is opened in the grooved base. The first locking bolt passes through the second positioning mounting hole and is connected to the first positioning mounting hole.

[0012] In some embodiments of this utility model, a second positioning structure is provided between the tool mounting base and the groove base. The second positioning structure includes a third positioning hole and a positioning pin. One of the third positioning hole and the positioning pin is provided in the tool mounting base, and the other is provided in the mounting groove. When the tool mounting base is installed in the mounting groove, the positioning pin is inserted into the third positioning hole.

[0013] In some embodiments of this utility model, the tool mounting base and the groove base are fixedly welded together.

[0014] In some embodiments of this utility model, the outer peripheral wall of the inner spindle is provided with a plurality of grooved base mounting positions at intervals, each grooved base mounting position is equipped with a tool mounting assembly, and the outer surface of the outer shell is provided with a plurality of clearance holes corresponding one-to-one with the plurality of tool mounting assemblies.

[0015] In some embodiments of this utility model, the tool mounting base is located inside the clearance hole, or the tool mounting base at least partially passes through the clearance hole and extends to the outside of the outer housing.

[0016] In some embodiments of this utility model, the outer shell is sleeved on the outer periphery of the inner spindle and there is a gap between the outer shell and the inner spindle. Each grooved base is in sealed contact or sealed connection with the periphery of the corresponding clearance hole. Both ends of the inner spindle are provided with sealing elements that can block the opening between the inner spindle and the outer shell. The inner spindle, the outer shell, and the two sealing elements together form a cooling cavity. One of the sealing elements has a liquid inlet communicating with the cooling cavity, and the other sealing element has a liquid outlet communicating with the cooling cavity.

[0017] In some embodiments of this utility model, the sealing element is an annular flange, which is welded together with the inner spindle and the outer shell.

[0018] In some embodiments of this utility model, the outer shell includes multiple outer layer patches, and the multiple outer layer patches are welded and spliced ​​together to form the outer shell. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a schematic diagram of the structure of a layered main shaft for a crusher according to certain embodiments of the present invention;

[0021] Figure 2 for Figure 1 The diagram shows a structural schematic of a layered main shaft for a crusher when one of its seals is in a disengaged state.

[0022] Figure 3 for Figure 1 The diagram shows a cross-sectional structure of a layered main shaft for a crusher along line AA.

[0023] Figure 4 for Figure 1 The diagram shows a structural schematic of a layered spindle for a crusher when one of the outer layer patches is in a separated state.

[0024] Figure 5 for Figure 1 The figure shows a part drawing of the inner spindle in a layered spindle for a crusher;

[0025] Figure 6 for Figure 1 The diagram shows a structure of a layered main shaft for a crusher after the inner main shaft has been removed.

[0026] Figure 7 for Figure 1 The diagram shows an assembly structure of the inner spindle and the tool mounting assembly in a layered spindle for a crusher.

[0027] Figure 8 for Figure 1 The figure shows an exploded view of the assembly structure of the inner spindle and the tool mounting assembly in a layered spindle for a crusher.

[0028] Figure 9 for Figure 1 The diagram shows a cross-sectional structure of a layered main shaft for a crusher along the BB line.

[0029] Figure 10 for Figure 3 Enlarged view of point C in the middle;

[0030] Figure 11 for Figure 9 Enlarged diagram of point D in the middle. Detailed Implementation

[0031] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0032] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0033] In the description of this utility model, "several" means one or more, "multiple" means three or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first," "second," etc., are used only to distinguish technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0034] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0035] Figures 1 to 11 This is a schematic diagram of some embodiments of the layered spindle of a crusher according to the present invention.

[0036] Reference Figures 1 to 11 and mainly refer to Figure 2 , Figure 3 , Figure 4 , Figure 8 , Figure 9 , Figure 10 and Figure 11According to certain embodiments of this utility model, a layered spindle for a crusher (hereinafter referred to as "layered spindle" for ease of explanation) includes an inner spindle 100, a cutter mounting assembly 200, and an outer housing 300. The inner spindle 100 is in the shape of a long rod. In this embodiment, the inner spindle 100 is a cylindrical, hollow metal tube. To ensure sufficient structural strength, the inner spindle 100 is made of high-strength alloy steel. A grooved base mounting position 110 is provided on the outer surface of the inner spindle 100. In this embodiment, the grooved base mounting position 110 is a mounting plane machined and formed on the outer surface of the inner spindle 100. The tool mounting assembly 200 is disposed on the grooved base mounting position 110. The tool mounting assembly 200 includes a grooved base 210 and a tool mounting seat 220. The grooved base 210 is mounted on the grooved base mounting position 110. A mounting groove 211 is formed on the side surface of the grooved base 210 away from the grooved base mounting position 110. In this embodiment, the mounting groove 211 is a V-shaped groove or a rectangular groove. The tool mounting seat 220 is mounted on the mounting groove 211. The outer shell 300 is a hollow shell component. The outer shell 300 is sleeved on the outer periphery of the inner spindle 100 and is fixedly connected to the inner spindle 100. A clearance hole 310 is formed at the position of the outer shell 300 corresponding to the tool mounting assembly 200. When the layered spindle of this embodiment is used for crushing, the cutter can be installed on the cutter mounting base 220. At this time, the cutter passes through the above-mentioned clearance hole 310 and protrudes from the outside of the outer shell 300. Thus, when the layered spindle is installed on the crusher and crushing is performed, the cutter protruding from the outside of the outer shell 300 can cut the crushed workpiece, ensuring the normal operation of the crusher.

[0037] The layered spindle in this embodiment adopts a structure composed of an inner spindle 100, a tool mounting assembly 200, and an outer housing 300. Therefore, only the grooved base mounting position 110 needs to be machined on the outer surface of the inner spindle 100. Then, the grooved base 210 of the tool mounting assembly 200 is fixedly installed in the grooved base mounting position 110. After that, the tool mounting seat 220 is fixedly installed in the mounting groove 211 of the grooved base 210. At the same time, the outer housing 300 is correspondingly sleeved on the outer periphery of the inner spindle 100 and fixedly connected to the inner spindle 110. Subsequently, the tool can be fixedly installed in the tool mounting seat 220 for normal use. By adopting the above structure, the inner spindle 100 only needs to be machined at the grooved base mounting position 110, eliminating the traditional method of using a multi-axis machine tool to machine mounting grooves for mounting tools and / or tool mounts on the spindle, greatly reducing the machining cost of the inner spindle 100. In addition, depending on the different tools or tool mounts 220 installed, grooved bases 210 of different shapes and structures can be manufactured and then installed at the grooved base mounting position 110 of the inner spindle 100. This allows the inner spindle 100 to be used to install different tools and tool mounts 220, expanding the range of layered spindles that can be used to install different tools and / or tool mounts 220. At the same time, enterprises do not need to stock inner spindle blanks of various specifications, which helps to reduce the production and operating costs of enterprises.

[0038] Reference Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 To ensure a more secure installation of the grooved base 210 onto the inner spindle 100, in some embodiments of this invention, the grooved base 210 is welded to the grooved base mounting position 110 of the inner spindle 100. By welding the grooved base 210 to the grooved base mounting position 110 of the inner spindle 100, the connection between the grooved base 210 and the inner spindle 100 becomes stronger, less prone to loosening or detachment, and helps the layered spindle of this embodiment withstand greater loads during subsequent crushing processes without damaging the grooved base 210.

[0039] In order to ensure that the grooved base 210 can be accurately installed on the inner spindle 100, in some embodiments of the present invention, the inner spindle 100 is cylindrical and hollow inside. A first positioning structure is provided between the grooved base 210 and the inner spindle 100. The first positioning structure includes a first positioning mounting hole 111, a second positioning mounting hole 212 and a first locking bolt 213. The first positioning mounting hole 111 is arranged in the grooved base mounting position 110 along the radial direction of the inner spindle 100. The second positioning mounting hole 212 is opened in the grooved base 210. The first locking bolt 213 passes through the second positioning mounting hole 212 and is connected to the first positioning mounting hole 111. By adopting the above structure, the grooved base 210 is installed on the inner spindle 100. The second positioning mounting hole 212 of the grooved base 210 can be aligned with the first positioning mounting hole 111 of the grooved base mounting position 110. Then, the first locking bolt 213 is passed through the second positioning mounting hole 212 and connected to the first positioning mounting hole 111, so that the grooved base 210 is accurately positioned and installed on the inner spindle 100. After that, the grooved base 210 is welded and fixed to the inner spindle 100, which further improves the connection performance between the grooved base 210 and the inner spindle 100.

[0040] To ensure accurate mounting of the tool mount 220 onto the grooved base 210, in some embodiments of this invention, a second positioning structure is provided between the tool mount 220 and the grooved base 210. This second positioning structure includes a third positioning hole 221 and a positioning pin 230. When the third positioning hole 221 is located on the tool mount 220, the positioning pin 230 is located in the mounting groove 211; when the third positioning hole 221 is located in the mounting groove 211, the positioning pin 230 is located on the tool mount 220. By employing this structure, when the tool mount 220 needs to be mounted on the grooved base 210, the positioning pin 230 can be aligned and inserted into the third positioning hole 221. At this time, the tool mount 220 can be positioned and mounted on the grooved base 210, and thus mounted in the mounting groove 211.

[0041] To improve the connection force between the tool mount 220 and the grooved base 210, in some embodiments of this invention, the tool mount 220 and the grooved base 210 are fixedly welded together. By welding the tool mount 220 and the grooved base 210 together, the connection force between them can be greatly improved. This allows the tool mount 220 to withstand a greater load without separating from the grooved base 210 when the layered spindle of this embodiment is subsequently used for crushing, ensuring the normal use of the layered spindle.

[0042] It is understandable that the tool mount 220, the groove base 210 and the inner spindle 100 can also be welded together to form a whole, thereby improving the overall connection strength between the tool mount 220, the groove base 210 and the inner spindle 100.

[0043] Reference Figures 1 to 8 To facilitate the installation of multiple cutting tools, in some embodiments of this invention, the outer peripheral wall of the inner spindle 100 is provided with multiple grooved base mounting positions 110 at intervals. Each grooved base mounting position 110 is equipped with a cutting tool mounting assembly 200. The outer surface of the outer shell 300 is provided with multiple clearance holes 310 corresponding to the multiple cutting tool mounting assemblies 200. By adopting the above structure, the layered spindle of this embodiment can be used to install multiple cutting tools, thereby enabling the layered spindle to drive multiple cutting tools simultaneously for crushing operations, improving the efficiency of the crushing operation.

[0044] In some embodiments of this utility model, when the clearance holes 310 on the outer surface of the outer housing 300 correspond one-to-one with the tool mounting assemblies 200 on the outer periphery of the inner spindle 100, the tool mounting base 220 is located inside the clearance holes 310. By adopting the above structure, when the tool is mounted on the tool mounting base 220, only the tool passes through the clearance holes 310 and protrudes from the outer surface of the outer housing 300. Subsequently, when the layered spindle of this embodiment is used for crushing, the probability of material contacting the tool mounting assembly 200 is greatly reduced, which helps to reduce the wear of the tool mounting assembly 200. Alternatively, when the clearance holes 310 on the outer surface of the outer housing 300 correspond one-to-one with the tool mounting assemblies 200 on the outer periphery of the inner spindle 100, the tool mounting base 220 at least partially passes through the clearance holes 310 and extends to the outside of the outer housing 300. By adopting the above structure, when the tool is installed in the tool mounting seat 220, both the tool mounting seat 220 and the tool pass through the clearance hole 310 and protrude from the outer surface of the outer shell 300. Subsequently, when the layered spindle of this embodiment is used for crushing, the tool mounting seat 220 and the tool can simultaneously crush the material, thereby improving the crushing efficiency of the material.

[0045] Because the material repeatedly rubs against the outer shell 300 and the cutters during prolonged crushing operations, causing the temperature of the layered spindle to rise, in order to prevent the temperature of the layered spindle from rising or becoming excessive, refer to... Figure 2 , Figure 3 , Figure 4 , Figure 9 , Figure 10 and Figure 11In some embodiments of this utility model, the outer shell 300 is sleeved on the outer periphery of the inner spindle 100, and there is a gap between the outer shell 300 and the inner spindle 100. Each groove base 210 is in sealed contact or sealed connection with the periphery of the corresponding clearance hole 310. Both ends of the inner spindle 100 are provided with sealing members 400 that can block the opening between the inner spindle 100 and the outer shell 300. The inner spindle 100, the outer shell 300 and the two sealing members 400 together form a cooling cavity 410. One of the sealing members 400 has a liquid inlet that communicates with the cooling cavity 410, and the other sealing member 400 has a liquid outlet that communicates with the cooling cavity 410. By adopting the above structure, when the layered spindle of this embodiment is used for crushing materials, an external liquid cooling system can be used in conjunction with the layered spindle. The coolant of the external liquid cooling system flows in from the inlet of the seal 400 at one end of the layered spindle, flows along the cooling chamber 410 to the seal 400 at the other end of the layered spindle and flows out from the outlet. A circulating cooling circuit is formed between the inner spindle 100 and the outer shell 300, thereby reducing the overall temperature of the layered spindle. This ensures that when the layered spindle of this embodiment is used for crushing materials such as plastics, the plastic will not undergo plastic deformation due to the increase in temperature of the layered spindle, and the bearings supporting the layered spindle will not be damaged due to the increase in temperature of the layered spindle, which helps to protect the bearings and extend their service life.

[0046] To facilitate subsequent assembly of the layered spindle, in some embodiments of this invention, the sealing element 400 is an annular flange, which is welded together with the inner spindle 100 and the outer housing 300. By adopting the above structure, when the layered spindle of this embodiment is subsequently installed in the crusher, it can be connected to the crusher's drive system via the flange, making assembly simpler and more convenient.

[0047] To facilitate the production and processing of the outer shell 300, in some embodiments of this utility model, the outer shell 300 includes multiple outer layer patches 301, which are welded together to form the outer shell 300. By adopting the above structure, the production and processing of the outer shell 300 is facilitated. When some parts of the outer shell 300 are worn in the future, it is only necessary to remove the damaged outer layer patch 301 and weld a new outer layer patch 301, which is convenient for maintenance.

[0048] In order to improve the wear resistance of the outer shell 300, in some embodiments of this utility model, the outer patch 301 is made of a high wear-resistant material, which greatly improves the wear resistance of the outer shell 300 in this embodiment and makes it less prone to wear in the future.

[0049] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A layered spindle for a crusher, characterized in that, include: The inner spindle (100) is in the shape of a long rod, and the outer surface of the inner spindle (100) is provided with a grooved base mounting position (110); A tool mounting assembly (200) is disposed at the grooved base mounting position (110). The tool mounting assembly (200) includes a grooved base (210) and a tool mounting seat (220). The grooved base (210) is mounted at the grooved base mounting position (110). A mounting groove (211) is formed on the side surface of the grooved base (210) away from the grooved base mounting position (110). The tool mounting seat (220) is mounted in the mounting groove (211). The outer shell (300) is hollow inside. The outer shell (300) is sleeved on the outer periphery of the inner spindle (100) and the outer shell (300) is fixedly connected to the inner spindle (100). The outer shell (300) has a clearance hole (310) at a position corresponding to the tool mounting assembly (200).

2. A layered main shaft for a crusher according to claim 1, characterized in that: The grooved base (210) is welded and fixed to the grooved base mounting position (110) of the inner spindle (100).

3. A layered main shaft for a crusher according to claim 1 or 2, characterized in that: The inner spindle (100) is cylindrical and hollow inside. A first positioning structure is provided between the grooved base (210) and the inner spindle (100). The first positioning structure includes a first positioning mounting hole (111), a second positioning mounting hole (212), and a first locking bolt (213). The first positioning mounting hole (111) is arranged in the grooved base mounting position (110) along the radial direction of the inner spindle (100). The second positioning mounting hole (212) is opened in the grooved base (210). The first locking bolt (213) passes through the second positioning mounting hole (212) and is connected to the first positioning mounting hole (111).

4. A layered main shaft for a crusher according to claim 1, characterized in that: A second positioning structure is provided between the tool mounting base (220) and the grooved base (210). The second positioning structure includes a third positioning hole (221) and a positioning pin (230). One of the third positioning hole (221) and the positioning pin (230) is provided in the tool mounting base (220), and the other is provided in the mounting groove (211). When the tool mounting base (220) is installed in the mounting groove (211), the positioning pin (230) is inserted into the third positioning hole (221).

5. A layered main shaft for a crusher according to claim 1 or 4, characterized in that: The tool mounting base (220) and the groove base (210) are fixedly welded together.

6. A layered main shaft for a crusher according to claim 1, characterized in that: The outer peripheral wall of the inner spindle (100) is provided with a plurality of grooved base mounting positions (110) at intervals, and each grooved base mounting position (110) is equipped with a tool mounting assembly (200). The outer surface of the outer shell (300) is provided with a plurality of clearance holes (310) corresponding one-to-one with the plurality of tool mounting assemblies (200).

7. A layered main shaft for a crusher according to claim 1 or 6, characterized in that: The tool mount (220) is located inside the clearance hole (310), or the tool mount (220) at least partially passes through the clearance hole (310) and extends to the outside of the outer housing (300).

8. A layered main shaft for a crusher according to claim 1, characterized in that: The outer shell (300) is sleeved on the outer periphery of the inner spindle (100) and there is a gap between the outer shell (300) and the inner spindle (100). Each groove base (210) is in sealed contact or sealed connection with the periphery of the corresponding clearance hole (310). Both ends of the inner spindle (100) are provided with sealing elements (400) that can block the opening between the inner spindle (100) and the outer shell (300). The inner spindle (100), the outer shell (300) and the two sealing elements (400) together form a cooling cavity (410). One of the sealing elements (400) has a liquid inlet that communicates with the cooling cavity (410), and the other sealing element (400) has a liquid outlet that communicates with the cooling cavity (410).

9. A layered spindle for a crusher according to claim 8, characterized in that: The sealing element (400) is an annular flange, which is welded together with the inner spindle (100) and the outer shell (300).

10. A layered main shaft for a crusher according to claim 1, characterized in that: The outer shell (300) includes multiple outer layer patches (301), which are welded together to form the outer shell (300).

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