Sealing end cover, bearing box and wire cutting machine

Abstract

The utility model relates to the technical field of sealing structures, in particular to a sealing end cover, a bearing box and a wire cutting machine, and aims to solve the problem that cutting powder generated in the process that a to-be-cut part is cut by the wire cutting machine is diffused to the bearing box, and the bearing lubricating environment is damaged. In order to achieve the purpose, the sealing end cover comprises an end cover body, and a center hole allowing a mounting body to penetrate through is formed in the end cover body in the axial direction; the end cover body is provided with a first end face and a second end face which are opposite to each other, an air inlet hole and a liquid inlet hole which are communicated to the center hole are formed in the end cover body, and the liquid inlet hole is located between the air inlet hole and the first end face. By the adoption of the bearing box, due to the air pressure effect, in the working process of the bearing box, the gap formed by the installation body and the end cover body is filled with liquid all the time, the path for cutting powder and other external impurities to enter the bearing box is blocked, and therefore the sealing effect is achieved, and a bearing in the bearing box is protected.

Description

Technical Field

[0001] The present application relates to the technical field of sealing structures, and specifically provides a sealing end cover, a bearing box and a wire cutting machine. Background Art

[0002] Wire cutting is a processing method in which the cutting wire reciprocates at high speed and moves relative to the workpiece to be cut (such as photovoltaic silicon rods, semiconductors, silicon carbide, sapphire, magnetic materials, etc.) to cut the workpiece.

[0003] In the process of cutting the workpiece, a large amount of cutting powder will be generated. The cutting powder will perform Brownian motion in the cutting chamber and diffuse into the bearing box, thereby destroying the lubrication environment of the bearing and causing lubrication failure. In severe cases, it will cause abnormal noise in the bearing box, increase in temperature, and even damage the bearing box.

[0004] Accordingly, the art needs a new sealing method to solve the above problems. Utility Model Content

[0005] The present application aims to solve the above technical problem, that is, to solve the problem that the cutting powder generated during the wire cutting machine cutting the workpiece to be cut diffuses into the bearing box and destroys the bearing lubrication environment.

[0006] In a first aspect, the present application provides a sealing end cover, comprising an end cover body, wherein the end cover body is provided with a central hole in the axial direction for the installation body to pass through;

[0007] The end cover body has a first end face and a second end face opposite to each other. An air inlet hole and a liquid inlet hole connected to the central hole are opened on the end cover body. The liquid inlet hole is located between the air inlet hole and the first end face.

[0008] When the above technical solution is adopted, during the operation of the bearing box, high-pressure gas is introduced into the air inlet hole, and liquid is introduced into the liquid inlet hole. Since there is a gap between the mounting body in the bearing box and the hole wall of the center hole of the end cover body, the high-pressure gas is filled in the gap, so that the liquid can only flow along the gap toward the first end face under the action of gas pressure. Therefore, during the process of the wire cutting machine cutting the workpiece to be cut, since the liquid is always filled in the gap formed by the mounting body and the end cover body, the path for external impurities such as cutting powder to enter the bearing box is blocked, thereby achieving a sealing effect and protecting the bearings in the bearing box. The present application sets a liquid path at the front end of the gas path, and the liquid physically separates the cutting chamber environment and the internal environment of the bearing box into two independent environments, thereby maximizing the sealing effect. Compared with the method of adopting simple gas sealing, the gap between the mounting body and the sealing end cover is not easily clogged with impurities, which improves the cleanliness of the gap and reduces the frequency of equipment cleaning.

[0009] Optionally, a first annular cavity is formed on the inner wall of the central hole along the circumferential direction, and the air inlet is connected to the first annular cavity.

[0010] When the above technical solution is adopted, the present application can ensure that the air inlet position is covered with high-pressure gas along the circumferential direction of the end cover body, preventing part of the liquid from flowing to the second end face, thereby further ensuring the sealing.

[0011] Optionally, a guide cavity is circumferentially formed on a side wall of the first annular cavity close to the first end surface, and the guide cavity is respectively connected to the first annular cavity and the central hole.

[0012] When the above-mentioned technical solution is adopted, the present application can enable the guide cavity to guide the flow of the fluid in the first annular cavity, so that the fluid is more likely to flow in one direction, that is, to flow in the direction from the second end face to the first end face, thereby reducing the possibility of fluid backflow, thereby further ensuring the sealing effect.

[0013] Optionally, a second annular cavity is formed on the inner wall of the central hole along the circumferential direction, and the liquid inlet hole is connected to the second annular cavity.

[0014] When adopting the above-mentioned technical solution, the present application can ensure that the liquid inlet hole position is covered with liquid along the circumferential direction of the end cover body, and the liquid in the second annular cavity separates its two sides into two independent environments, preventing high-pressure gas from directly passing through the first end face at some positions, thereby further ensuring the sealing.

[0015] Optionally, a guide cavity is circumferentially formed on a side wall of the second annular cavity close to the first end surface, and the guide cavity is respectively connected to the second annular cavity and the center hole.

[0016] When the above-mentioned technical solution is adopted, the present application can enable the guide cavity to guide the flow of the fluid in the second annular cavity, so that the fluid is more likely to flow in one direction, that is, to flow in the direction from the second end face to the first end face, thereby reducing the possibility of fluid backflow, thereby further ensuring the sealing effect.

[0017] Optionally, a third annular cavity is formed on the inner wall of the central hole along the circumferential direction, and the third annular cavity is located between the air inlet hole and the liquid inlet hole.

[0018] When adopting the above technical solution, the present application increases the number of cavities for gas storage, so that the third annular cavity and the first annular cavity together constitute a gas barrier, effectively ensuring the air pressure value on one side of the liquid inlet, thereby ensuring sealing.

[0019] Optionally, a guide cavity is circumferentially provided on a side wall of the third annular cavity close to the first end face, and the guide cavity is respectively connected to the third annular cavity and the center hole.

[0020] When adopting the above-mentioned technical solution, the present application can enable the guide cavity to guide the flow of the fluid in the third annular cavity, so that the fluid is more likely to flow in one direction, that is, to flow in the direction from the second end face to the first end face, thereby reducing the possibility of fluid backflow, thereby further ensuring the sealing effect.

[0021] Optionally, the cross-section of the guide cavity gradually decreases along the direction from the second end surface to the first end surface.

[0022] When the above technical solution is adopted, the flow speed of the fluid in the direction from the second end face to the first end face can be accelerated, thereby further reducing the possibility of fluid backflow.

[0023] Optionally, there are multiple third annular cavities, and the multiple third annular cavities are distributed at intervals along the axial direction of the end cover body.

[0024] Optionally, the air inlet and the liquid inlet are both opened along the radial direction of the end cover body.

[0025] When the above technical solution is adopted, the present application can shorten the length of the air inlet and the liquid inlet, thereby shortening the flow path of the fluid.

[0026] Optionally, a positioning hole is provided on the end cover body.

[0027] Optionally, the positioning hole is a countersunk hole.

[0028] When the above technical solution is adopted, the end of the bolt or other locking member can be received in the countersunk hole, which not only avoids the interference of the bolt or other locking members with other surrounding components, saves space, but also enhances the aesthetic appearance of the first end face.

[0029] In a second aspect, the present application provides a bearing box for mounting a mounting body, comprising:

[0030] an outer housing having opposing first and second ends;

[0031] a bearing disposed in the outer shell;

[0032] The sealing end cover according to any one of the first aspects is provided at the first end of the outer shell, wherein the second end surface of the end cover body is connected to the first end of the outer shell; and

[0033] The base is arranged at the second end of the outer shell.

[0034] When the above technical solution is adopted, during the rotation of the installation body, gas is continuously introduced into the air inlet of the end cover body, and liquid is introduced into the liquid inlet of the end cover body. Under the action of air pressure, the liquid continues to flow into the cutting chamber. The liquid fills the gap between the end cover body and the installation body, playing a sealing role. After the liquid enters the cutting chamber, it can be recovered together with the cutting fluid in the cutting chamber, and will not affect the operation of the wire cutting machine.

[0035] Optionally, the bearing box further comprises:

[0036] a positioning sleeve disposed in the outer shell, the positioning sleeve abutting against the bearing to limit the axial displacement of the bearing; and

[0037] A locking member is located at the second end of the outer shell, is used to be connected to the installation body, and is tightly pressed against the positioning sleeve.

[0038] When the above technical solution is adopted, the present application can effectively limit the bearing in the axial direction.

[0039] Optionally, the locking member is a nut.

[0040] Optionally, the bearing box further comprises:

[0041] A sealing gasket is located between the bearing and the end cover body, and the sealing gasket is interference fit with the outer shell.

[0042] Optionally, the sealing gasket is a labyrinth sealing gasket.

[0043] When the above technical solution is adopted, the present application can further improve the sealing effect.

[0044] In a third aspect, the present application provides a wire cutting machine, comprising:

[0045] Cutting the frame;

[0046] The bearing housing according to any one of the second aspects is mounted on the cutting frame;

[0047] The main roller assembly comprises a cutting main roller, and both ends of the cutting main roller are respectively installed in the bearing box. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The preferred embodiments of the present application are described below with reference to the accompanying drawings, in which:

[0049] Figure 1 Schematic diagram of the structure of the sealing end cover provided in the embodiment of the present application;

[0050] Figure 2 yes Figure 1a cross-sectional view of the middle sealing end cover;

[0051] Figure 3 yes Figure 2 A partial enlarged view of part A;

[0052] Figure 4 1 is a structural diagram of a bearing box provided in an embodiment of the present application;

[0053] Figure 5 yes Figure 4 sectional view of

[0054] Figure 6 yes Figure 5 A partial enlarged view of part B;

[0055] In the figures, the reference numerals refer to the following:

[0056] 1. End cap body; 11. First end face; 12. Second end face; 13. Air inlet; 14. Liquid inlet; 15. First annular cavity; 16. Second annular cavity; 17. Third annular cavity; 18. Diversion cavity; 19. Positioning hole; 2. Outer shell; 21. First end; 22. Second end; 3. Bearing; 4. Base; 5. Positioning sleeve; 6. Locking member; 7. Sealing gasket;

[0057] 100, center hole; 200, main shaft. DETAILED DESCRIPTION

[0058] The preferred embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely intended to illustrate the technical principles of the present application and are not intended to limit the scope of protection of the present application. Those skilled in the art may adjust these embodiments as needed to suit specific applications.

[0059] It should be noted that, in the description of this application, terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the relevant devices or components must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, ordinal numbers such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] Furthermore, it should be noted that, in the description of this application, unless otherwise specified or limited, the terms "installed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0061] Reference Figure 1 and Figure 2 , is a sealing end cover disclosed in this application, which is used to be installed at the end of the bearing box. The sealing end cover includes an end cover body 1.

[0062] The end cap body 1 is disc-shaped and has a center hole 100 along its axial direction. When the mounting body is mounted on the bearing housing, the mounting body passes through the center hole 100. It should be understood that the mounting body can be a rotating shaft workpiece such as a spindle.

[0063] For convenience of description, one end surface of the end cover body 1 is referred to as the first end surface 11, and the end surface opposite to the first end surface 11 is referred to as the second end surface 12. When the end cover body 1 is mounted on the bearing box, the second end surface 12 is connected to the housing of the bearing box.

[0064] The end cap body 1 is provided with an air inlet 13 and a liquid inlet 14. One end of each of the air inlet 13 and the liquid inlet 14 is connected to the outer circumference of the end cap body 1, and the other end is connected to the central hole 100. The liquid inlet 14 is located near the first end face 11, and the air inlet 13 is located near the second end face 12, so that the liquid inlet 14 is located between the first end face 11 and the air inlet 13.

[0065] In one possible implementation of the present application, both the air inlet 13 and the liquid inlet 14 are formed radially along the end cap body 1, thereby shortening the length of the air inlet 13 and the liquid inlet 14, thereby shortening the fluid flow path. Of course, the specific structure of the air inlet 13 and the liquid inlet 14 is not limited to the above-described embodiment. They can also be angled relative to the radial direction of the end cap body 1 or be serpentine channels, as long as they can achieve communication between the external fluid and the central hole 100. This application does not impose any restrictions on this.

[0066] When the sealing end cover of the present application is installed on the bearing box, the second end face 12 is facing the mounting end of the bearing box and connected to the bearing box. During operation of the bearing box, high-pressure gas is introduced into the air inlet 13, and liquid is introduced into the liquid inlet 14. Since there is a gap between the mounting body in the bearing box and the hole wall of the center hole 100 of the end cover body 1, the high-pressure gas is filled in the gap, so that the liquid can only flow along the gap toward the first end face 11 under the action of gas pressure. Therefore, during the process of cutting the workpiece to be cut by the wire cutting machine, since the liquid is always filled in the gap formed by the mounting body and the end cover body 1, the path for external impurities such as cutting powder to enter the bearing box is blocked, thereby achieving a sealing effect and protecting the bearings in the bearing box.

[0067] For the sake of convenience, this application refers to the end where the first end face 11 of the sealing end cover is located as the front end, the path along which the gas flows from the air inlet 13 to the gap as the gas path, and the path along which the liquid flows from the liquid inlet 14 to the gap as the liquid path. It can be seen that this application sets a liquid path at the front end of the gas path, and the liquid physically separates the cutting chamber environment and the internal environment of the bearing box into two independent environments, thereby maximizing the sealing effect. Compared with the method of using a simple gas seal, the sealing end cover of this application, when installed on the bearing box, is not easily clogged with impurities in the gap between the installation body and the sealing end cover, thereby improving the cleanliness of the gap and reducing the frequency of equipment cleaning.

[0068] It should be noted that the liquid introduced into the liquid inlet 14 in the present application can be pure water, or cutting fluid used for cutting the workpiece to be cut, and the present application does not impose any restrictions on this.

[0069] It should also be noted that the sealing end cover in the present application is not limited to the sealing of the bearing box. The sealing end cover of the present application can be used for sealing in other occasions such as the sealing of rotating shaft workpieces. Without deviating from the principles of the present application, equivalent changes or replacements made to its application scenarios are within the scope of protection of the present application.

[0070] Reference Figure 2 and Figure 3 As a possible implementation of the present application, a first annular cavity 15 is circumferentially formed on the inner wall of the center hole 100 , and the air inlet 13 is connected to the first annular cavity 15 .

[0071] When high-pressure gas is introduced into the air inlet 13, the gas will fill the first annular cavity 15, ensuring that the air inlet 13 is covered with high-pressure gas along the circumferential direction of the end cover body 1, preventing part of the liquid from flowing to the second end face 12, thereby further ensuring the sealing.

[0072] Furthermore, a second annular cavity 16 is formed on the inner wall of the central hole 100 along the circumferential direction, and the second annular cavity 16 is communicated with the liquid inlet 14 .

[0073] When liquid is introduced into the liquid inlet hole 14, the liquid will fill the second annular cavity 16, ensuring that the position of the liquid inlet hole 14 is covered with liquid along the circumferential direction of the end cover body 1. The liquid in the second annular cavity 16 separates its two sides into two independent environments, preventing high-pressure gas from directly passing through the first end face 11 at some positions, thereby further ensuring the sealing.

[0074] Reference Figure 2 and Figure 3 In some possible implementations of the present application, a third annular cavity 17 may be further provided on the inner wall of the central hole 100 between the air inlet hole 13 and the liquid inlet hole 14. When gas is introduced into the air inlet hole 13, the gas flows sequentially along the first annular cavity 15 and the gap between the mounting body and the central hole 100, and is filled in the third annular cavity 17. The third annular cavity 17 serves to maintain pressure, that is, it increases the number of cavities for gas storage, so that the third annular cavity 17 and the first annular cavity 15 together form a gas barrier, effectively maintaining the air pressure on the side of the liquid inlet hole 14, thereby ensuring sealing.

[0075] In order to further improve the sealing performance, a plurality of third annular cavities 17 can be provided at intervals along the axial direction of the end cover body 1 .

[0076] Reference Figure 3 As a possible implementation of the present application, a guide cavity 18 is circumferentially provided on the side wall of at least one of the first annular cavity 15 , the second annular cavity 16 and the third annular cavity 17 , close to the first end face 11 .

[0077] Optionally, in the present application, a guide cavity 18 is circumferentially provided on the side walls of the first annular cavity 15, the second annular cavity 16, and the third annular cavity 17 near the first end face 11. The guide cavity 18 is connected to the center hole 100, and the cross-section of the guide cavity 18 gradually decreases along the direction from the second end face 12 to the first end face 11. For example, in some implementation forms, the cross-sectional shape of the guide cavity 18 is triangular, or fan-shaped. Due to the change in the cross-sectional shape of the guide cavity 18, the guide cavity 18 guides the flow of gas in the first annular cavity 15 and the third annular cavity 17, and the flow of liquid in the second annular cavity 16, making it easier for the fluid to flow in one direction, that is, to flow in the direction from the second end face 12 to the first end face 11, reducing the possibility of fluid backflow, thereby further ensuring the sealing effect.

[0078] Reference Figure 1 and Figure 2In order to facilitate the installation of the sealing end cover on the main body of the equipment such as the bearing box, a positioning hole 19 is opened on the end cover body 1. During the installation process, the end cover body 1 can be fixedly connected to the bearing box by inserting a locking member such as a bolt into the positioning hole 19.

[0079] In order to enhance the installation stability, a plurality of positioning holes 19 may be opened along the circumference of the end cover body 1 .

[0080] Optionally, the positioning holes 19 are all configured as countersunk holes. The configuration of the countersunk holes allows the ends of locking members such as bolts to be received in the countersunk holes, thereby avoiding interference between the locking members such as bolts and other surrounding components, saving space, and enhancing the aesthetic appearance of the first end face 11.

[0081] Reference Figure 4 and Figure 5 The present application also discloses a bearing housing, which includes an outer shell 2, a bearing 3, a base 4, and a sealing end cover as described in any of the above embodiments. The bearing housing is used to mount a mounting body. In this embodiment, the main shaft 200 is used as the mounting body for illustration.

[0082] The outer shell 2 is a cylindrical structure with two open ends, having opposing first and second ends 21 and 22. A sealing end cap is mounted on the first end 21, and the base 4 is mounted on the second end 22. In this embodiment of the wire cutting machine, the spindle 200 sequentially passes through the base 4, the outer shell 2, and the sealing end cap. Specifically, the second end surface 12 of the end cap body 1 faces the outer shell 2 and is fixedly connected to the outer shell 2.

[0083] Bearing 3 is disposed within outer housing 2. Multiple bearings 3 can be provided based on actual needs. When multiple bearings 3 are provided, bearing retaining rings are provided between adjacent bearings 3. The outer ring of bearing 3 has an interference fit with outer housing 2, while the inner ring of bearing 3 has an interference fit with spindle 200.

[0084] Reference Figure 5 and Figure 6 By introducing high-pressure gas into the air inlet 13 and liquid into the liquid inlet 14, under the action of air pressure, the liquid flows along the gap between the end cover body 1 and the main shaft 200 toward the first end face 11 and is discharged into the cutting chamber of the wire cutting machine, thereby preventing cutting powder or other impurities in the cutting chamber from diffusing into the outer shell along the gap, ensuring that the lubrication environment of the bearing 3 is not affected.

[0085] A sealing gasket 7 is also installed between the bearing 3 and the end cap body 1. The outer ring of the sealing gasket 7 has an interference fit with the inner wall of the outer shell 2. The provision of the sealing gasket 7 further improves the sealing effect. Optionally, the sealing gasket 7 in the present application adopts a labyrinth seal, which can extend the movement path of foreign matter when entering the outer shell 2, thereby enhancing the sealing performance.

[0086] Reference Figure 5 As a possible implementation of the present application, a positioning sleeve 5 and a locking member 6 are further provided in the bearing box.

[0087] The positioning sleeve 5 is designed to be mounted on the mounting body of the bearing housing, such as the spindle 200. The positioning sleeve 5 can slide axially relative to the spindle 200. The locking member 6 is located near the second end 22 of the outer housing 2. The locking member 6 can move axially relative to the spindle 200 and is fixedly connected to the spindle 200. For example, in some implementations, the locking member 6 is a nut, and the outer surface of the spindle 200 is provided with threads that match the nut. The locking member 6 is threadedly connected to the spindle 200.

[0088] By setting the positioning sleeve 5 and the locking piece 6, when the main shaft 200 is installed on the bearing box, one end of the bearing 3 abuts against the shoulder of the main shaft 200, and then the positioning sleeve 5 slides along the main shaft 200 and abuts against the other end of the bearing 3. Finally, by adjusting the position of the locking piece 6, the locking piece 6 abuts against the positioning sleeve 5, and the positioning sleeve 5 fixes the bearing 3, thereby limiting the axial displacement of the bearing 3.

[0089] The present application also discloses a wire cutting machine, comprising a cutting frame and a main roller assembly, and a bearing box in any of the above embodiments, wherein the bearing box is mounted on the cutting frame, the main roller assembly comprises a cutting main roller, and both ends of the cutting main roller are respectively mounted in the bearing box.

[0090] It should be noted that the specific number of bearing boxes in the wire cutting machine is determined according to actual needs. For example, a bearing box is provided at both ends of each cutting main roller of the wire cutting machine so that the ends of the cutting main rollers can be connected to the main shaft. During the rotation of the main shaft, gas is continuously introduced into the air inlet 13 of the end cover body 1, and liquid is introduced into the liquid inlet 14 of the end cover body 1. Under the action of gas pressure, the liquid continuously flows into the cutting chamber, filling the gap between the end cover body 1 and the main shaft, playing a sealing role. Moreover, after the liquid enters the cutting chamber, it can be recovered together with the cutting fluid in the cutting chamber, without affecting the operation of the wire cutting machine.

[0091] Thus far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A sealing end cover, characterized in that: It includes an end cover body, wherein a central hole for the installation body to pass through is opened in the axial direction of the end cover body; The end cover body has a first end face and a second end face opposite to each other. An air inlet hole and a liquid inlet hole connected to the central hole are opened on the end cover body. The liquid inlet hole is located between the air inlet hole and the first end face.

2. The sealing end cover according to claim 1, characterized in that: A first annular cavity is formed on the inner wall of the central hole along the circumferential direction, and the air inlet is communicated with the first annular cavity.

3. The sealing end cover according to claim 2, characterized in that: A flow guide cavity is circumferentially formed on a side wall of the first annular cavity close to the first end surface, and the flow guide cavity is communicated with the first annular cavity and the central hole respectively.

4. The sealing end cover according to claim 1, characterized in that: A second annular cavity is formed on the inner wall of the central hole along the circumferential direction, and the liquid inlet hole is communicated with the second annular cavity.

5. The sealing end cover according to claim 4, characterized in that: A flow guide cavity is circumferentially formed on a side wall of the second annular cavity close to the first end surface, and the flow guide cavity is communicated with the second annular cavity and the center hole respectively.

6. The sealing end cover according to claim 1, characterized in that: A third annular cavity is formed on the inner wall of the central hole along the circumferential direction, and the third annular cavity is located between the air inlet and the liquid inlet.

7. The sealing end cover according to claim 6, characterized in that: A flow guide cavity is circumferentially formed on a side wall of the third annular cavity close to the first end surface, and the flow guide cavity is respectively communicated with the third annular cavity and the central hole.

8. The sealing end cover according to claim 3, 5 or 7, characterized in that: The cross section of the guide cavity gradually decreases along the direction from the second end surface to the first end surface.

9. The sealing end cover according to claim 6, characterized in that: There are multiple third annular cavities, and the multiple third annular cavities are distributed at intervals along the axial direction of the end cover body.

10. The sealing end cover according to claim 1, characterized in that: The air inlet and the liquid inlet are both opened along the radial direction of the end cover body.

11. The sealing end cover according to claim 1, characterized in that: A positioning hole is provided on the end cover body.

12. The sealing end cover according to claim 11, characterized in that: The positioning hole is a countersunk hole.

13. A bearing box for mounting a mounting body, characterized in that: include: an outer housing having opposing first and second ends; a bearing disposed in the outer shell; The sealing end cover according to any one of claims 1 to 12, which is provided at the first end of the outer shell, and the second end surface of the end cover body is connected to the first end of the outer shell; and The base is arranged at the second end of the outer shell.

14. The bearing housing according to claim 13, wherein: The bearing housing further comprises: a positioning sleeve disposed in the outer shell, the positioning sleeve abutting against the bearing to limit the axial displacement of the bearing; and A locking member is located at the second end of the outer shell, is used to be connected to the installation body, and is tightly pressed against the positioning sleeve.

15. The bearing housing according to claim 14, characterized in that The locking piece is a nut.

16. The bearing housing according to claim 13, wherein: The bearing housing further comprises: A sealing gasket is located between the bearing and the end cover body, and the sealing gasket is interference fit with the outer shell.

17. The bearing housing according to claim 16, wherein: The sealing gasket is a labyrinth sealing gasket.

18. A wire cutting machine, characterized in that: The wire cutting machine comprises: Cutting the frame; The bearing box according to any one of claims 13 to 17, which is mounted on the cutting frame; The main roller assembly comprises a cutting main roller, and both ends of the cutting main roller are respectively installed in the bearing box.

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