A machine tool swing head anti-pollution structure and numerical control machine tool

Abstract

The utility model provides a kind of machine tool swing head antifouling structure and numerical control machine tool, it is related to numerical control machine tool technical field, solve the technical problem that the existing technology exists, sealing ring is realized between cover and motor assembly by adopting isolation, isolation effect is not ideal, leading to grating assembly precision is not ideal.The machine tool swing head antifouling structure and numerical control machine tool include shell main body and rotating shaft, rotating shaft rotation seal is set in shell main body;Isolation end cover is also set in shell main body, the inner circle of isolation end cover is rotationally sealed with rotating shaft, to separate the inner cavity between shell main body and rotating shaft into drive chamber and independent chamber, motor assembly is set in drive chamber, grating assembly is set in independent chamber.The utility model is used to provide a kind of machine tool swing head antifouling structure and numerical control machine tool for improving the precision and life of grating assembly.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool technology, and in particular to a machine tool tilting head anti-fouling structure and a CNC machine tool. Background Technology

[0002] A swivel head is an important component of CNC machine tools, widely used in various precision machining and multi-faceted machining tasks. Machine tools with swivel heads can rotate the workpiece in multiple directions, thereby achieving multi-faceted machining, reducing the number of workpiece reclamping operations, and improving machining efficiency and accuracy. It is particularly widely used in industries such as aerospace, automotive, and mold manufacturing. Because the machine tool environment contains coolant and chips, the swivel head requires a good sealing design to prevent contaminants from entering the internal mechanisms and affecting accuracy and lifespan.

[0003] A machine tool oscillating head generally includes an AC axis housing, a rotating shaft, a housing assembly, a motor assembly, and a grating assembly. Both the motor assembly and the grating assembly are housed within the housing assembly. The hydraulic expansion sleeve in the motor assembly is used to brake the rotating shaft. The grating assembly is usually located between the cover of the housing assembly and the motor assembly. The cover and the motor assembly are isolated by a sealing ring, thereby reducing the entry of impurities that could contaminate the grating assembly and affect its accuracy and lifespan.

[0004] However, since the hydraulic expansion sleeve in the motor assembly requires the injection of hydraulic oil to deform and complete the braking, when the existing cover and motor assembly are isolated by a sealing ring, due to the rotation of the shaft, there will inevitably be a rotation gap at the contact point. During the braking process, impurities such as copper shavings will appear between the hydraulic expansion sleeve and the shaft and enter through the rotation gap to contaminate the grating assembly. If the hydraulic oil in the hydraulic expansion sleeve leaks, it will also enter through the rotation gap to contaminate the grating assembly, thus significantly affecting the accuracy and lifespan of the grating assembly. Utility Model Content

[0005] The purpose of this utility model is to provide a machine tool tilting head anti-fouling structure and a CNC machine tool, to solve the technical problem in the prior art where the isolation between the cover and the motor assembly is achieved by using a sealing ring, but the isolation effect is not ideal, resulting in unsatisfactory accuracy of the grating assembly. The various technical effects of the preferred technical solution among the many technical solutions provided by this utility model are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The anti-fouling structure for machine tool swivel heads provided by this utility model includes a housing body and a rotating shaft, wherein the rotating shaft is rotatably sealed inside the housing body;

[0008] An isolation end cap is also provided inside the outer shell body. The inner circle of the isolation end cap is rotatably and sealingly connected to the rotating shaft to divide the inner cavity between the outer shell body and the rotating shaft into a drive chamber and an independent chamber. The motor assembly is located in the drive chamber, and the grating assembly is located in the independent chamber.

[0009] As an optional implementation, the outer casing body includes a motor housing, a grating housing, and a grating guard plate. The first end of the motor housing is rotatably and sealedly connected to the rotating shaft. The isolation end cover is disposed between the second end of the motor housing and the first end of the grating housing. The grating guard plate is disposed on the rotating shaft and is rotatably and sealedly connected to the second end of the grating housing.

[0010] As an optional implementation, the grating housing includes a main body segment and an extension segment, the extension segment being connected to the main body segment, the main body segment being a cylindrical structure, and the extension segment being a conical structure.

[0011] As an optional implementation, a maintenance window is provided on the grating housing; and / or, a conduit protection plate is provided on the grating protective plate.

[0012] As an optional implementation, a first sealing structure is provided between the grating housing and the isolation end cap; and / or, the first sealing structure is a sealing ring.

[0013] As an optional implementation, the motor housing includes a motor outer shell and a motor flange. The motor outer shell is rotatably and sealingly connected to the rotating shaft, the motor flange is connected to the motor outer shell, and the isolation end cap is disposed between the motor flange and the grating housing.

[0014] As an optional implementation, a conductive ring is provided on the motor flange, and the conductive ring is coaxially arranged with the motor housing so that a receiving chamber is formed between the motor housing and the conductive ring.

[0015] As an optional implementation, the motor assembly includes a motor stator, a motor rotor, and a hydraulic expansion sleeve. The motor stator is connected to the motor housing, and the motor stator and the motor rotor are correspondingly arranged. The motor rotor is connected to the rotating shaft through the motor bushing, so that both the motor stator and the motor rotor are disposed in the receiving cavity.

[0016] The hydraulic expansion sleeve is disposed on the conductive ring and is located between the conductive ring and the rotating shaft. An oil injection chamber is formed between the hydraulic expansion sleeve and the conductive ring.

[0017] As an optional implementation, the conductive ring is provided with an oil inlet channel and an exhaust channel, and the motor flange is provided with an oil inlet hole and an exhaust hole. The oil inlet channel is connected between the oil filling chamber and the oil inlet hole, and the exhaust channel is connected between the exhaust hole and the oil filling chamber.

[0018] As an optional implementation, the motor housing includes a flange, a motor cooling jacket, and a cooling shell. The cooling shell is disposed on the motor cooling jacket. The flange is connected to the rotating shaft via a bearing. The motor cooling jacket is connected to the flange. The motor flange is connected to the motor cooling jacket.

[0019] A CNC machine tool includes the anti-fouling structure for the machine tool tilting head as described above.

[0020] The beneficial effects of this utility model are as follows: The anti-fouling structure for the machine tool swivel head and the CNC machine tool provided by this utility model include a housing body and a rotating shaft. The rotating shaft is rotatably sealed inside the housing body, forming an inner cavity between the housing body and the rotating shaft. An isolation end cap is also provided inside the housing body. The inner circle of the isolation end cap is rotatably sealed to the rotating shaft to divide the inner cavity between the housing body and the rotating shaft into a drive chamber and an independent chamber. The motor assembly is located in the drive chamber, and the grating assembly is located in the independent chamber. By providing the isolation end cap in the inner cavity, the isolation end cap can separate the motor assembly and the grating assembly, thereby preventing lubricating oil or impurities in the motor assembly from entering and contaminating the grating assembly, thus effectively protecting the grating assembly and improving its accuracy and lifespan. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a partial structural schematic diagram of the present invention;

[0024] Figure 3 This is a partial structural diagram of the present invention (A).

[0025] Figure 4 This is a partial structural diagram of the present invention, B.

[0026] Figure 5This is a schematic diagram of the grating housing structure of this utility model;

[0027] Figure 6 This is a schematic diagram of the motor flange structure of this utility model.

[0028] In the picture:

[0029] 10. Main housing; 11. Rotating shaft; 12. Isolation end cap; 13. Drive chamber; 14. Independent chamber; 15. Reading head; 16. Grating ruler; 17. Motor housing; 18. Grating housing; 19. Grating protective plate; 20. Conduit protective plate;

[0030] 21. Motor flange; 22. Conductor ring; 23. Motor stator; 24. Motor rotor; 25. Hydraulic expansion sleeve; 26. Motor bushing; 27. Bearing; 28. Flange; 29. ​​Motor cooling jacket; 30. Cooling shell;

[0031] 31. Oil inlet channel; 32. Exhaust channel; 33. Oil inlet hole; 34. Exhaust hole; 35. Shaft housing; 36. Receiving chamber; 37. Oil filling chamber; 38. Maintenance window. Detailed Implementation

[0032] Please refer to the attached diagram below. Figures 1-6 This document explains the content of this utility model and its differences from existing technologies. The technical solutions (including preferred solutions) of this utility model are further described in detail below through accompanying drawings and examples of optional embodiments. It should be noted that any technical feature or solution in this embodiment is one or more of a variety of optional technical features or solutions. For the sake of brevity, this document cannot exhaustively list all alternative technical features and solutions of this utility model, nor is it convenient to emphasize that each implementation of a technical feature is one of multiple optional implementations. Therefore, those skilled in the art should understand that any technical means provided by this utility model can be replaced, or any two or more technical means or features provided by this utility model can be combined to obtain a new technical solution. No technical feature or solution in this embodiment limits the scope of protection of this utility model. The scope of protection of this utility model should include any alternative technical solutions that can be conceived by those skilled in the art without creative effort, as well as new technical solutions obtained by combining any two or more technical means or features provided by this utility model.

[0033] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] This invention provides a machine tool head anti-fouling structure and CNC machine tool that improves the accuracy and lifespan of grating components.

[0036] The following is combined Figures 1-6 The technical solution provided by this utility model will be described in more detail.

[0037] This utility model provides a machine tool tilting head anti-fouling structure, including a housing body 10 and a rotating shaft 11, wherein the rotating shaft 11 is rotatably and sealed inside the housing body 10;

[0038] An isolation end cap 12 is also provided inside the outer shell body 10. The inner circle of the isolation end cap 12 is rotatably and sealingly connected to the rotating shaft 11 to divide the inner cavity between the outer shell body 10 and the rotating shaft 11 into a drive chamber 13 and an independent chamber 14. The motor assembly is located in the drive chamber 13, and the grating assembly is located in the independent chamber 14.

[0039] The anti-fouling structure for a machine tool swivel head provided by this utility model includes a housing body 10 and a rotating shaft 11. The rotating shaft 11 is rotatably sealed inside the housing body 10, forming an inner cavity between the housing body 10 and the rotating shaft 11. An isolation end cap 12 is also provided inside the housing body 10. The inner circle of the isolation end cap 12 is rotatably sealed to the rotating shaft 11 to divide the inner cavity between the housing body 10 and the rotating shaft 11 into a drive chamber 13 and an independent chamber 14. The motor assembly is located in the drive chamber 13, and the grating assembly is located in the independent chamber 14. By providing the isolation end cap 12 in the inner cavity, the isolation end cap 12 can separate the motor assembly and the grating assembly, thereby preventing lubricating oil or impurities in the motor assembly from entering and contaminating the grating assembly, thus effectively protecting the grating assembly and improving its accuracy and lifespan.

[0040] It is understood that the isolation end cap 12 is disposed inside the outer shell body 10, and the inner circle of the isolation end cap 12 is rotatably sealed to the rotating shaft 11. Specifically, the inner circle of the isolation end cap 12 and the rotating shaft 11 are rotatably sealed to each other by means of an axial oil seal, thereby effectively preventing lubricating oil or impurities from entering the independent chamber 14 where the grating assembly is located, effectively protecting the grating assembly and improving the accuracy and life of the grating assembly.

[0041] It should be noted that rotary sealing connections typically employ axial and / or radial sealing to ensure a good sealing effect. The grating assembly includes a reading head 15 and a grating ruler 16. The grating ruler 16 is mounted on the rotating shaft 11 within the independent chamber 14, and the reading head 15 is mounted on the outer shell 10 or the isolation end cap 12 within the independent chamber 14. The reading head 15 and the grating ruler 16 are correspondingly arranged.

[0042] In some embodiments of this utility model, the outer shell body 10 includes a motor housing 17, a grating housing 18, and a grating guard plate 19. The first end of the motor housing 17 is rotatably and sealingly connected to the rotating shaft 11. The isolation end cover 12 is disposed between the second end of the motor housing 17 and the first end of the grating housing 18. The grating guard plate 19 is disposed on the rotating shaft 11, and the grating guard plate 19 is rotatably and sealingly connected to the second end of the grating housing 18.

[0043] In some embodiments of the present invention described above, the outer casing 10 includes a motor housing 17, a grating housing 18, and a grating guard plate 19. An isolation end cap 12 is disposed between the second end of the motor housing 17 and the first end of the grating housing 18. The first end of the motor housing 17 is connected to the rotating shaft 11 via a bearing 27, and the two are rotatably sealed together, thereby forming a drive chamber 13 between the isolation end cap 12, the rotating shaft 11, and the motor housing 17. The motor assembly is disposed within the drive chamber 13. The grating guard plate 19 is provided with… The grating is placed on the rotating shaft 11, and the grating guard plate 19 is rotatably and sealingly connected to the second end of the grating housing 18, thereby forming an independent chamber 14 between the isolation end cover 12, the grating housing 18, the grating guard plate 19 and the rotating shaft 11. The grating assembly is disposed in the independent chamber 14. The drive chamber 13 and the independent chamber 14 are separated by the isolation end cover 12, thereby effectively preventing lubricating oil or media in the motor assembly from entering and contaminating the grating assembly, effectively protecting the grating assembly, and improving the accuracy and lifespan of the grating assembly.

[0044] It should be noted that the second end of the grating guard plate 19 and the grating housing 18 are connected by a combination of axial oil seal and radial seal to achieve a rotary seal connection.

[0045] In some embodiments of this utility model, the grating housing 18 includes a main body segment and an extension segment, the extension segment being connected to the main body segment, the main body segment being a cylindrical structure, and the extension segment being a conical structure.

[0046] In some of the embodiments of the present invention described above, the grating housing 18 is formed by connecting a cylindrical main body section and a conical extension section. The conical structure facilitates the flow of chips or coolant along the inner wall of the grating housing 18, preventing the accumulation of chips or coolant, effectively preventing contamination of the grating assembly, effectively protecting the grating assembly, and improving the accuracy and lifespan of the grating assembly.

[0047] In some embodiments of this utility model, a maintenance window 38 is provided on the grating housing 18; and / or, a conduit protection plate 20 is provided on the grating guard plate 19.

[0048] In some of the embodiments of this utility model described above, a maintenance window 38 is provided on the grating housing 18 to facilitate maintenance when the grating is contaminated or otherwise damaged.

[0049] Specifically, a maintenance hole is provided on the grating housing 18, and a cover is provided on the maintenance hole. The cover is detachably provided on the maintenance hole.

[0050] The grating guard plate 19 is provided with a conduit guard plate 20, which is made of plastic or soft rubber. The conduit guard plate 20 can protect the lines and conduits and reduce the damage to the lines and conduits when the rotating shaft 11 rotates.

[0051] In some embodiments of this utility model, a first sealing structure is provided between the grating housing 18 and the isolation end cap 12; and / or, the first sealing structure is a sealing ring.

[0052] In some of the embodiments of the present invention described above, in order to ensure the sealing effect of the independent chamber 14, a first sealing structure is provided between the grating housing 18 and the isolation end cap 12.

[0053] Specifically, the first sealing structure is a sealing ring.

[0054] In some embodiments of this utility model, the motor housing 17 includes a motor outer shell and a motor flange 21. The motor outer shell is rotatably and sealedly connected to the rotating shaft 11, the motor flange 21 is connected to the motor outer shell, and the isolation end cap 12 is disposed between the motor flange 21 and the grating housing 18.

[0055] In some embodiments of this utility model, a conductive ring 22 is provided on the motor flange 21, and the conductive ring 22 is coaxially arranged with the motor housing so that a receiving chamber 36 is formed between the motor housing and the conductive ring 22.

[0056] In some embodiments of the present invention described above, a conductive ring 22 is provided on the motor flange 21, and a receiving chamber 36 is formed between the motor housing and the conductive ring 22. The motor stator 23 and the motor rotor 24 of the motor assembly are disposed in the receiving chamber 36, and the hydraulic expansion sleeve 25 is disposed between the conductive ring 22 and the rotating shaft 11, thereby forming an oil injection chamber 37 between the hydraulic expansion sleeve 25 and the conductive ring 22. By injecting lubricating oil, the hydraulic expansion sleeve 25 can be braked.

[0057] Specifically, the motor assembly includes a motor stator 23, a motor rotor 24, and a hydraulic expansion sleeve 25. The motor stator 23 is connected to the motor housing. The motor stator 23 and the motor rotor 24 are correspondingly arranged. The motor rotor 24 is connected to the rotating shaft 11 through a motor bushing 26, so that both the motor stator 23 and the motor rotor 24 are arranged in the receiving chamber 36.

[0058] The hydraulic expansion sleeve 25 is disposed on the conductive ring 22, and the hydraulic expansion sleeve 25 is located between the conductive ring 22 and the rotating shaft 11. An oil injection chamber 37 is formed between the hydraulic expansion sleeve 25 and the conductive ring 22.

[0059] In some embodiments of this utility model, the motor housing includes a flange 28, a motor cooling sleeve 29, and a cooling shell 30. The cooling shell 30 is disposed on the motor cooling sleeve 29. The flange 28 is connected to the rotating shaft 11 via a bearing 27. The motor cooling sleeve 29 is connected to the flange 28, and the motor flange 21 is connected to the motor cooling sleeve 29.

[0060] In some embodiments of the present invention described above, the motor housing includes a flange 28, a motor cooling sleeve 29, and a cooling shell 30. The cooling shell 30 is disposed on the motor cooling sleeve 29, and a cooling channel is formed between the motor cooling sleeve 29 and the cooling shell 30. The motor cooling sleeve 29 is connected to the flange 28, and the motor flange 21 is connected to the motor cooling sleeve 29, thereby forming a drive chamber 13 between the flange 28, the motor cooling sleeve 29, the motor flange 21, and the isolation end cover 12.

[0061] In some embodiments of this utility model, the conductive ring 22 is provided with an oil inlet channel 31 and an exhaust channel 32, and the motor flange 21 is provided with an oil inlet hole 33 and an exhaust hole 34. The oil inlet channel 31 is connected between the oil filling chamber 37 and the oil inlet hole 33, and the exhaust channel 32 is connected between the exhaust hole 34 and the oil filling chamber 37.

[0062] In some embodiments of the present invention described above, hydraulic oil is injected into the oil inlet 33 and enters the oil filling chamber 37 formed by the hydraulic expansion sleeve 25 and the conductive ring 22. As the amount of hydraulic oil in the oil filling chamber 37 increases, the air in the oil filling chamber 37 can be discharged through the vent hole 34. When oil leaks from the vent hole 34, it is sealed. The oil inlet needs to be arranged at the lower end of the vent hole 34, and the vent hole 34 should be as high as possible in the oil filling chamber 37 to facilitate the complete removal of air from the oil filling chamber 37.

[0063] This utility model also provides a CNC machine tool, including the anti-fouling structure for the machine tool tilting head as described above.

[0064] Example 1:

[0065] The anti-fouling structure for a machine tool swivel head provided by this utility model includes a spindle housing, a motor housing 17, a rotating shaft 11, an isolation end cover 12, a grating housing 18, and a grating guard plate 19. The spindle housing is connected to the rotating shaft 11. The first end of the motor housing 17 is rotatably connected to the rotating shaft 11 via a bearing 27, and a radial seal is used to achieve a rotational sealing connection. The isolation end cover 12 is disposed between the second end of the motor housing 17 and the first end of the grating housing 18. The inner circle of the isolation end cover 12 is axially sealed to the rotating shaft 11. The grating guard plate 19 is mounted on the rotating shaft 11, and the second end of the grating guard plate 19 and the grating housing 18 are connected by a combination of axial sealing and radial sealing to achieve a rotatable sealing connection. This results in a drive chamber 13 being formed between the isolation end cover 12, the rotating shaft 11 and the motor housing 17, and an independent chamber 14 being formed between the isolation end cover 12, the rotating shaft 11, the grating guard plate 19 and the grating housing 18. The motor assembly is located in the drive chamber 13 and the grating assembly is located in the independent chamber 14.

[0066] Furthermore, the motor housing 17 includes a motor outer shell and a motor flange 21. The motor outer shell and the rotating shaft 11 are connected by a radial seal to achieve a rotational seal. The motor flange 21 is connected to the motor outer shell. The isolation end cap 12 is disposed between the motor flange 21 and the grating housing 18.

[0067] A conductive ring 22 is provided on the motor flange 21. The conductive ring 22 is coaxially arranged with the motor housing so that a receiving chamber 36 is formed between the motor housing and the conductive ring 22.

[0068] The motor assembly includes a motor stator 23, a motor rotor 24, and a hydraulic expansion sleeve 25. The motor stator 23 is connected to the motor housing. The motor stator 23 and the motor rotor 24 are correspondingly arranged. The motor rotor 24 is connected to the rotating shaft 11 through a motor bushing 26, so that both the motor stator 23 and the motor rotor 24 are disposed in the receiving chamber 36, thereby effectively separating the motor stator 23, the motor rotor 24, and the hydraulic expansion sleeve 25, and preventing lubricating oil from entering the receiving chamber 36.

[0069] The hydraulic expansion sleeve 25 is disposed on the conductive ring 22, and the hydraulic expansion sleeve 25 is located between the conductive ring 22 and the rotating shaft 11. An oil injection chamber 37 is formed between the hydraulic expansion sleeve 25 and the conductive ring 22.

[0070] Furthermore, the conductive ring 22 is provided with an oil inlet channel 31 and an exhaust channel 32, and the motor flange 21 is provided with an oil inlet hole 33 and an exhaust hole 34. The oil inlet channel 31 is connected between the oil filling chamber 37 and the oil inlet hole 33, and the exhaust channel 32 is connected between the exhaust hole 34 and the oil filling chamber 37.

[0071] Specifically, the motor housing includes a flange 28, a motor cooling jacket 29, and a cooling shell 30. The cooling shell 30 is disposed on the motor cooling jacket 29. The flange 28 is connected to the rotating shaft 11 via a bearing 27. The motor cooling jacket 29 is connected to the flange 28, and the motor flange 21 is connected to the motor cooling jacket 29.

[0072] Optionally, the grating housing 18 includes a main body segment and an extension segment, the extension segment being connected to the main body segment, the main body segment being a cylindrical structure, and the extension segment being a conical structure.

[0073] Furthermore, a maintenance window 38 is provided on the grating housing 18; and / or, a conduit protection plate 20 is provided on the grating guard plate 19.

[0074] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0075] Of course, this invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A machine tool tilting head anti-fouling structure, characterized in that, It includes a housing body and a rotating shaft, wherein the rotating shaft is rotatably sealed within the housing body; An isolation end cap is also provided inside the outer shell body. The inner circle of the isolation end cap is rotatably and sealingly connected to the rotating shaft to divide the inner cavity between the outer shell body and the rotating shaft into a drive chamber and an independent chamber. The motor assembly is located in the drive chamber, and the grating assembly is located in the independent chamber.

2. The anti-fouling structure for machine tool swivel heads according to claim 1, characterized in that, The outer casing includes a motor housing, a grating housing, and a grating guard plate. The first end of the motor housing is rotatably and sealed to the rotating shaft. The isolation end cover is disposed between the second end of the motor housing and the first end of the grating housing. The grating guard plate is disposed on the rotating shaft and is rotatably and sealed to the second end of the grating housing.

3. The anti-fouling structure for machine tool swivel heads according to claim 2, characterized in that, The grating housing includes a main body section and an extension section, the extension section being connected to the main body section. The main body section has a cylindrical structure, and the extension section has a conical structure.

4. The anti-fouling structure for machine tool swivel heads according to claim 2, characterized in that, The grating housing is provided with a maintenance window; and / or, the grating protective plate is provided with a conduit protective plate.

5. The anti-fouling structure for machine tool swivel heads according to claim 2, characterized in that, A first sealing structure is provided between the grating housing and the isolation end cap; and / or, the first sealing structure is a sealing ring.

6. The anti-fouling structure for machine tool swivel heads according to claim 2, characterized in that, The motor housing includes a motor outer shell and a motor flange. The motor outer shell is rotatably and sealed to the rotating shaft. The motor flange is connected to the motor outer shell. The isolation end cap is disposed between the motor flange and the grating housing.

7. The anti-fouling structure for machine tool swivel heads according to claim 6, characterized in that, A conductive ring is provided on the motor flange, and the conductive ring is coaxially arranged with the motor housing so that a receiving chamber is formed between the motor housing and the conductive ring.

8. The anti-fouling structure for machine tool swivel heads according to claim 7, characterized in that, The motor assembly includes a motor stator, a motor rotor, and a hydraulic expansion sleeve. The motor stator is connected to the motor housing. The motor stator and the motor rotor are correspondingly arranged. The motor rotor is connected to the rotating shaft through the motor bushing, so that both the motor stator and the motor rotor are disposed in the receiving cavity. The hydraulic expansion sleeve is disposed on the conductive ring and is located between the conductive ring and the rotating shaft. An oil injection chamber is formed between the hydraulic expansion sleeve and the conductive ring.

9. The anti-fouling structure for machine tool swivel heads according to claim 8, characterized in that, The conductive ring is provided with an oil inlet channel and an exhaust channel. The motor flange is provided with an oil inlet hole and an exhaust hole. The oil inlet channel is connected between the oil filling chamber and the oil inlet hole, and the exhaust channel is connected between the exhaust hole and the oil filling chamber.

10. The anti-fouling structure for machine tool swivel heads according to claim 6, characterized in that, The motor housing includes a flange, a motor cooling jacket, and a cooling shell. The cooling shell is disposed on the motor cooling jacket. The flange is connected to the rotating shaft via a bearing. The motor cooling jacket is connected to the flange. The motor flange is connected to the motor cooling jacket.

11. A CNC machine tool, characterized in that, Includes the anti-fouling structure for machine tool swivel heads as described in any one of claims 1-10.

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