An AC swing head with a cooling system and a CNC machine tool

Abstract

This invention provides an AC swivel head and a CNC machine tool with a cooling system. The AC swivel head includes an AC swivel head housing, an A-axis assembly, and a C-axis assembly. The AC swivel head housing has a first mounting position, where the A-axis assembly is mounted and fixed. The AC swivel head housing also has a second mounting position, where the C-axis assembly is mounted and fixed. A first cooling channel is provided at the first mounting position and / or on the A-axis assembly, through which refrigerant fluid flows to cool the A-axis assembly. A second cooling channel is also provided at the second mounting position and / or on the C-axis assembly, through which refrigerant fluid flows to cool the C-axis assembly. This invention utilizes the state and temperature changes of the refrigerant between high and low pressure to achieve efficient heat exchange, effectively solving the problem of low cooling efficiency caused by the inability to effectively dissipate internal heat in existing swivel heads.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool equipment technology, specifically to an AC swing head with a cooling system and a CNC machine tool. Background Technology

[0002] Swivel spindle technology holds a core position in the field of CNC machine tools, serving as a key technology for achieving five-axis linkage machining. It is widely used in high-end manufacturing sectors such as aerospace, automotive manufacturing, medical devices, and 3C electronics. Swivel spindle technology integrates traditional electric spindles, servo drives, hydraulic drives, and direct-drive motors, representing a significant innovation in the CNC machine tool industry.

[0003] However, the heat generated during the oscillating head's operation is a key issue restricting its performance and precision. Breakthroughs in its heat dissipation and cooling technologies will directly determine the processing accuracy and efficiency of future high-end manufacturing. Among these, the electromagnetic losses generated by the direct-drive motor are one of the main sources of heat inside the oscillating head. For example, CN221828753U discloses a heat dissipation component inside the oscillating head housing to cool the A-axis motor. This component includes a heat-conducting pipe spirally wound around the motor, resulting in low cooling efficiency and a complex structure. CN202701905U discloses a spindle cooling system, including a chiller, a coolant tank, and an output pipe, which also has low cooling efficiency and a large footprint.

[0004] Because existing oscillating heads suffer from low cooling efficiency due to the inability to effectively dissipate internal heat, this invention researches and designs an AC oscillating head with a cooling system and a CNC machine tool. Utility Model Content

[0005] Therefore, the technical problem to be solved by this utility model is to overcome the defect that the internal heat of the oscillating head in the prior art cannot be effectively dissipated, resulting in low cooling and heat dissipation efficiency, and thus provide an AC oscillating head and CNC machine tool with a cooling system.

[0006] To solve the above problems, this utility model provides an AC oscillating head with a cooling system, comprising: The AC oscillating head housing comprises an A-axis assembly and a C-axis assembly. The AC oscillating head housing has a first mounting position, and the A-axis assembly is mounted and fixed to the first mounting position. The AC oscillating head housing also has a second mounting position, and the C-axis assembly is mounted and fixed to the second mounting position. A first cooling channel is further provided at the first mounting position and / or on the A-axis assembly, through which refrigerant fluid can flow to dissipate heat and cool the A-axis assembly. A second cooling channel is further provided at the second mounting position and / or on the C-axis assembly, through which refrigerant fluid can flow to dissipate heat and cool the C-axis assembly.

[0007] In some implementations... It also includes compressor A and compressor C. The AC oscillating head housing also has a third installation position and a fourth installation position. Compressor A is located at the third installation position and can communicate with the first cooling channel to provide refrigerant fluid to the first cooling channel. Compressor C is located at the fourth installation position and can communicate with the second cooling channel to provide refrigerant fluid to the second cooling channel.

[0008] In some implementations... The first installation position includes a first installation slot structure, at least a portion of the A-axis assembly is inserted into the first installation slot, the inner wall of the first installation slot is provided with a first cooling channel, and the refrigerant from the outlet of the compressor A can flow into the first cooling channel to exchange heat with the A-axis assembly.

[0009] In some implementations... The second mounting position includes a second mounting slot, in which at least a portion of the C-axis assembly is inserted. The C-axis assembly includes a C-axis rotating shaft, on which a second cooling channel is provided. The refrigerant from the outlet of the compressor C can flow into the second cooling channel to exchange heat with the C-axis assembly.

[0010] In some implementations... The second cooling channel includes a first flow channel located between the inner and outer walls of the C-axis rotating shaft and a second flow channel located on the outer wall of the C-axis rotating shaft. The inlet end of the first flow channel can communicate with the compressor C, and the outlet end of the first flow channel can communicate with the compressor A. The second flow channel communicates with the first flow channel, and there is at least one second flow channel.

[0011] In some implementations... The third installation position is a third installation slot, and a third cooling channel is provided on one side wall of the third installation slot. The refrigerant from the outlet of the compressor A flows into the third cooling channel to release heat. The fourth installation position is a fourth installation slot, and a fourth cooling channel is provided on one side wall of the fourth installation slot. The refrigerant from the outlet of the compressor C flows into the fourth cooling channel to release heat.

[0012] In some implementations... The AC oscillating head housing also has a fifth slot, which is located between the third mounting slot and the fourth mounting slot. The fifth slot includes a first sidewall and a second sidewall. The first sidewall is closer to the third cooling channel than the second sidewall, and the second sidewall is closer to the fourth cooling channel than the first sidewall. The first sidewall has a fifth cooling channel that allows air to circulate and exchange heat with the refrigerant in the third cooling channel. The second sidewall has a sixth cooling channel that allows air to circulate and exchange heat with the refrigerant in the fourth cooling channel.

[0013] In some implementations... The fifth groove extends vertically upward to the second installation position, and extends horizontally to the A-axis mounting surface of the AC swing head housing, with the A-axis mounting surface located above the first installation position; the fifth cooling channel includes multiple parallel and interconnected fifth sub-channels, the third cooling channel includes multiple parallel and interconnected third sub-channels, and the fifth sub-channels and the third sub-channels form an angle of 45° to 135°; the sixth cooling channel includes multiple parallel and interconnected sixth sub-channels, and the fourth cooling channel includes multiple parallel and interconnected fourth sub-channels, and the sixth sub-channels and the fourth sub-channels form an angle of 45° to 135°; The third cooling channel and the fifth cooling channel are connected by the solid structure of the AC oscillating head box. Heat transfer between the third cooling channel and the fifth cooling channel is achieved through this solid structure. The fourth cooling channel and the sixth cooling channel are also connected by the solid structure of the AC oscillating head box. Heat transfer between the fourth cooling channel and the sixth cooling channel is achieved through this solid structure.

[0014] In some implementations... The AC oscillating head housing is also provided with a first air inlet, a first air outlet, a second air inlet, and a second air outlet. The first air inlet extends from the upper end of the AC oscillating head housing to communicate with the inlet end of the fifth cooling channel. The first air outlet extends from the upper end of the AC oscillating head housing to communicate with the outlet end of the fifth cooling channel. The second air inlet extends from the upper end of the AC oscillating head housing to communicate with the inlet end of the sixth cooling channel. The second air outlet extends from the upper end of the AC oscillating head housing to communicate with the outlet end of the sixth cooling channel.

[0015] In some implementations... It also includes expansion valve A and expansion valve C. Expansion valve A is connected between the outlet of the third cooling channel and the inlet of the first cooling channel, so that the refrigerant after releasing heat through the third cooling channel enters the expansion valve A for expansion and throttling, and then enters the first cooling channel to absorb heat. The expansion valve C is connected between the outlet of the fourth cooling channel and the inlet of the second cooling channel, so that the refrigerant after releasing heat in the fourth cooling channel enters the expansion valve C for expansion and throttling, and then enters the second cooling channel to absorb heat.

[0016] In some implementations... Expansion valve A is also located in the third mounting position, and expansion valve C is also located in the fourth mounting position. When the second cooling channel includes a first flow channel located between the inner and outer walls of the C-axis rotating shaft and a second flow channel located on the outer wall of the C-axis rotating shaft: The AC oscillating head housing is further provided with a first connecting channel, a second connecting channel, a connecting hole A, and a connecting hole C. One end of the first connecting channel is connected to the inlet end of the compressor A, and the other end of the first connecting channel is connected to the outlet end of the first flow channel through the connecting hole A. One end of the second connecting channel is connected to the outlet end of the expansion valve C, and the other end of the second connecting channel is connected to the inlet end of the first flow channel through the connecting hole C.

[0017] In some implementations... When the first installation position includes a structure with a first installation groove, and the first cooling channel is provided on the inner wall of the first installation groove: At least one first cooling channel is provided on the inner wall of the first mounting slot. The AC swing head box is also provided with a third connecting channel and a fourth connecting channel. One end of the third connecting channel is connected to the outlet end of the expansion valve A, and the other end of the third connecting channel is connected to the inlet end of the first cooling channel. One end of the fourth connecting channel is connected to the inlet end of the compressor C, and the other end of the fourth connecting channel is connected to the outlet end of the first cooling channel.

[0018] This utility model also provides a CNC machine tool, which includes the aforementioned AC swing head with a cooling system.

[0019] The AC swing head and CNC machine tool with a cooling system provided by this utility model have the following beneficial effects: 1. This utility model employs a split-type closed-loop AC oscillating head cooling structure by setting first and second cooling channels on the AC oscillating head housing and / or the A-axis assembly and / or the C-axis assembly, allowing refrigerant to be introduced separately to cool the A-axis assembly and C-axis assembly respectively. This forms a separate closed-loop AC oscillating head cooling structure. Utilizing the state and temperature changes of the refrigerant between high and low pressure, the refrigerant absorbs heat as it flows through the heat-generating parts of the motor, achieving efficient heat exchange. This structure significantly improves the cooling efficiency of the AC oscillating head motor, extends the service life of the equipment, enhances machining accuracy and system stability, and achieves the technical effect of efficient, stable, and safe operation. It effectively solves the problem in existing technologies where the internal heat of the oscillating head cannot be effectively dissipated, resulting in low cooling efficiency.

[0020] 2. This utility model further incorporates two compressors inside the AC oscillating head by installing compressor A and compressor C at the third and fourth positions on the AC oscillating head housing, respectively. This creates a closed-loop circulation structure within the oscillating head. Combined with the dual-compressor refrigerant circulation system, this allows for independent cooling of the direct-drive motor positions on the A and C axes of the oscillating head. This avoids the challenges of rotary sealing and piping layout caused by the need for connecting the cooling channels to an external system in traditional cooling methods. This utility model proposes a dual-compressor refrigerant cooling method inside the oscillating head, with two compressors connected in series to form a two-stage compression circulation system, thereby achieving efficient and rapid cooling of the motor position.

[0021] 3. This utility model features a fifth groove positioned between the third and fourth installation positions. A fifth and a sixth cooling channel are respectively installed on the fifth groove. Air flows into the fifth cooling channel to exchange heat with the refrigerant in the third cooling channel at the third installation position, ensuring heat dissipation to the outside. Air flows into the sixth cooling channel to exchange heat with the refrigerant in the fourth cooling channel at the fourth installation position, also ensuring heat dissipation to the outside. This effectively removes heat from the A-axis and C-axis components of the AC oscillating head through the airflow in the fifth groove. Furthermore, combined with two compressors and two expansion valves, a closed internal refrigerant circulation loop is formed, ensuring continuous and effective heat dissipation during AC oscillating head operation, thus improving the heat dissipation efficiency of the AC oscillating head. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the AC swing head with a cooling system of this utility model; Figure 2 This is an exploded structural diagram of the AC swing head with a cooling system according to this utility model; Figure 3a yes Figure 2 A front view of the AC oscillating head box in the first direction; Figure 3b yes Figure 2 A front view of the AC oscillating head box in the second direction; Figure 4 yes Figure 2 A 3D structural diagram of the C-axis rotating shaft in the diagram; Figure 5 yes Figure 2 Longitudinal section diagram of the C-axis rotating shaft; Figure 6 yes Figure 1 A schematic diagram of the flow channel structure of an AC oscillating head; Figure 7 yes Figure 1 The working principle and refrigerant flow structure diagram of the AC oscillating head.

[0023] The reference numerals in the attached figures are as follows: 1. AC oscillating head housing; 100. A-axis assembly; 200. C-axis assembly; 2. A-axis cover; 3. A-axis rotor mounting assembly (including rotor); 4. A-axis shaft; 5. A-axis bearing; 6. A-axis motor flange assembly (including stator); 7. Main shaft; 8. Main shaft mounting housing; 9. C-axis shaft; 10. C-axis flange; 11. C-axis bearing; 12. C-axis rotor mounting assembly (including rotor); 13. C-axis stator mounting assembly (including stator); 14. C-axis cover; 15. Cable tray; 16. Compressor mounting base plate; 17. Compressor A; 18. Compressor mounting block; 19. Cover; 20. AC oscillating head housing cover; 21. Expansion valve A; 22. Flow channel cover plate; 31. First installation position. 32. Second installation position; 33. First cooling channel; 34. Second cooling channel; 35. Compressor C; 36. Third installation position; 37. Fourth installation position; 38. Third cooling channel; 39. Fourth cooling channel; 40. Fifth slot; 41. Fifth cooling channel; 42. Sixth cooling channel; 43. Expansion valve C; 44. First connecting channel; 45. Second connecting channel; 46. Connecting hole A; 47. Connecting hole C; 48. First flow channel; 49. Second flow channel; 50. Third connecting channel; 51. Fourth connecting channel; 52. First air inlet; 53. First air outlet; 54. Second air inlet; 55. Second air outlet; 56. Connecting port A; 57. Connecting port C. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0027] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0028] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0029] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0030] like Figure 1-7 As shown, this utility model provides an AC oscillating head with a cooling system, which includes: The AC oscillating head housing 1 comprises an A-axis assembly 100 and a C-axis assembly 200. The AC oscillating head housing 1 has a first mounting position 31, where the A-axis assembly 100 is mounted and fixed. The AC oscillating head housing 1 also has a second mounting position 32, where the C-axis assembly 200 is mounted and fixed. A first cooling channel 33 is provided at the first mounting position 31 and / or on the A-axis assembly 100, through which refrigerant fluid can circulate to cool the A-axis assembly 100. A second cooling channel 34 is provided at the second mounting position 32 and / or on the C-axis assembly 200, through which refrigerant fluid can circulate to cool the C-axis assembly 200.

[0031] This invention employs the aforementioned method of setting first and second cooling channels on the AC oscillating head housing and / or the A-axis assembly and / or the C-axis assembly, allowing refrigerant to be introduced separately to cool the A-axis assembly and C-axis assembly respectively. This forms a split-type closed-loop AC oscillating head cooling structure. Utilizing the state and temperature changes of the refrigerant between high and low pressure, it absorbs heat as it flows through the heat-generating parts of the motor, achieving efficient heat exchange. This structure can significantly improve the cooling efficiency of the AC oscillating head motor, extend the service life of the equipment, improve processing accuracy and system stability, and achieve the technical effects of efficient, stable, and safe operation. It effectively solves the problem of low cooling efficiency caused by the inability to effectively dissipate internal heat in existing oscillating heads.

[0032] In some implementations... It also includes compressor A17 and compressor C35. The AC oscillating head housing 1 also has a third mounting position 36 and a fourth mounting position 37. The compressor A17 is located at the third mounting position 36 and can communicate with the first cooling channel 33 to provide refrigerant fluid to the first cooling channel 33. The compressor C35 is located at the fourth mounting position 37 and can communicate with the second cooling channel 34 to provide refrigerant fluid to the second cooling channel 34.

[0033] This invention further incorporates compressors A and C at the third and fourth positions on the AC oscillating head housing, respectively, thereby creating two compressors inside the AC oscillating head. This forms a closed-loop circulation structure within the oscillating head. Combined with the dual-compressor refrigerant circulation system, independent cooling is provided for the direct-drive motor positions of the A and C axes of the oscillating head. This avoids the rotational sealing and pipeline layout problems caused by the need for the cooling channel to be connected to an external system in traditional cooling methods, thus improving the cooling effect and system performance.

[0034] This invention innovates upon existing oscillating head cooling technology by proposing a split-type independent circulating cooling system structure for direct cooling of the internal direct-drive motor, thus solving the limitation of traditional cooling methods that require external pipes.

[0035] This utility model solves the following problems: 1. This utility model proposes a cooling circuit structure inside the oscillating head, which adopts a closed loop circuit structure and combines a dual-compressor refrigerant circulation system to independently cool the direct drive motor positions of the A and C axes of the oscillating head, thus solving the problems of rotary sealing and pipeline layout caused by the need for the cooling channel to be connected to an external system in traditional cooling methods; 2. This utility model proposes a dual-compressor refrigerant cooling method inside the oscillating head, forming a multi-stage compression system, thereby achieving efficient and rapid cooling of the motor position and solving the problem of low heat dissipation efficiency in existing oscillating heads.

[0036] In some implementations... The first mounting position 31 includes a first mounting groove structure, at least a portion of the structure of the A-axis assembly 100 is inserted into the first mounting groove, and the inner wall of the first mounting groove is provided with a first cooling channel 33, and the refrigerant from the outlet of the compressor A17 can flow into the first cooling channel 33 to exchange heat with the A-axis assembly 100.

[0037] This is a preferred structural form of the first installation position and the first cooling channel of this utility model. That is, a first cooling channel is formed on the inner wall of the first installation position (first installation groove) of the AC swing head box, and refrigerant can be introduced into the first cooling channel by the compressor A to cool and dissipate heat on the A-axis assembly.

[0038] In some implementations... The second mounting position 32 includes a second mounting groove, in which at least a portion of the C-axis assembly 200 is inserted. The C-axis assembly 200 includes a C-axis rotating shaft 9, on which a second cooling channel 34 is provided. The refrigerant from the outlet of the compressor C35 can flow into the second cooling channel 34 to exchange heat with the C-axis assembly 200.

[0039] This is a preferred structural form of the second mounting position and the second cooling channel of this utility model, that is, the second cooling channel is formed on the C-axis rotating shaft, and the compressor C can be used to introduce refrigerant into the second cooling channel to cool and dissipate heat from the C-axis assembly.

[0040] In some implementations... The second cooling channel 34 includes a first flow channel 48 located between the inner and outer walls of the C-axis shaft 9 and a second flow channel 49 located on the outer wall of the C-axis shaft 9. The inlet end of the first flow channel 48 can communicate with the compressor C35, and the outlet end of the first flow channel 48 can communicate with the compressor A17. The second flow channel 49 communicates with the first flow channel 48, and there is at least one second flow channel 49.

[0041] This is a further preferred structural form of the second cooling channel of this utility model. The second cooling channel includes a first flow channel between the inner and outer walls of the C-axis rotating shaft to introduce refrigerant from the outside, and a second flow channel on the outer wall of the C-axis rotating shaft to communicate with the first flow channel to introduce refrigerant to this location for cooling and heat dissipation of the C-axis assembly. There can be one or more second flow channels, and there can also be one or more first flow channels to ensure that it is connected to a closed (two compressors) refrigerant circulation loop, thereby improving the cooling effect on the C-axis rotating shaft.

[0042] This invention proposes a split-type closed-loop AC oscillating head cooling structure. By utilizing the state and temperature changes of the refrigerant between high and low pressure, the refrigerant absorbs heat when flowing through the heat-generating parts of the motor, achieving efficient heat exchange. This structure can significantly improve the cooling efficiency of the AC oscillating head motor.

[0043] like Figure 1 This utility model proposes an AC oscillating head for direct cooling of the internal direct drive motor, which is mainly composed of AC axis housing, A axis assembly, C axis assembly, etc.

[0044] like Figure 2 The overall assembly structure is shown in the figure.

[0045] like Figures 3a-3b The structure of the housing assembly is shown in the figure. The housing is equipped with a diffused cooling channel (first cooling channel 33) to cool the heat-generating area of ​​the A-axis motor. The channels are connected to each other through the connection port A56. The housing is also equipped with two refrigeration compressors (compressor A and compressor C) that are opposite to each other. They are connected to the air inlet and outlet of the housing channels, respectively. The compressors are fixed to the compressor fixing base plate 16 and the compressor fixing block 18. The air outlet of the refrigeration compressor is connected to the expansion valve A and the expansion valve C after passing through the third and fourth cooling channels. The third cooling channel 38 and the fourth cooling channel 39 of the housing are sealed by the channel cover plate 22.

[0046] like Figure 4 The shaft structure is shown in the figure. The outer circle of the shaft has a diffused flow channel (second flow channel 49) for cooling the C-axis motor position. The second flow channel 49 is connected to the first flow channel 48 through the connection port C57.

[0047] like Figure 5 The flow channel of this utility model has the structure shown in the figure. The refrigerant can circulate in the flow channel and absorb heat when passing through the heat-generating parts, thereby achieving continuous cooling of the motor.

[0048] In some implementations... The third mounting position 36 is a third mounting slot structure, and a third cooling channel 38 is provided on one side wall of the third mounting slot. The refrigerant from the outlet of the compressor A17 flows into the third cooling channel 38 to release heat. The fourth mounting position 37 is a fourth mounting slot structure, and a fourth cooling channel 39 is provided on one side wall of the fourth mounting slot. The refrigerant from the outlet of the compressor C35 flows into the fourth cooling channel 39 to release heat.

[0049] The present invention also preferably utilizes the third cooling channel provided on the side wall of the third mounting slot where compressor A is installed, which allows the refrigerant from the outlet of compressor A to be drawn into the third cooling channel, thereby forming a structure equivalent to a condenser to release heat to the outside. Similarly, the fourth cooling channel provided on the side wall of the fourth mounting slot where compressor C is installed allows the refrigerant from the outlet of compressor C to be drawn into the fourth cooling channel, thereby forming a structure equivalent to a condenser to release heat to the outside.

[0050] In some implementations... The AC oscillating head housing 1 is also provided with a fifth slot 40, which is located between the third mounting slot and the fourth mounting slot. The fifth slot 40 includes a first sidewall and a second sidewall. The first sidewall is closer to the third cooling channel 38 than the second sidewall, and the second sidewall is closer to the fourth cooling channel 39 than the first sidewall. A fifth cooling channel 41 is provided on the first sidewall, which can circulate air to exchange heat with the refrigerant in the third cooling channel 38. A sixth cooling channel 42 is provided on the second sidewall, which can circulate air to exchange heat with the refrigerant in the fourth cooling channel 39.

[0051] This invention utilizes a fifth groove positioned between the third and fourth installation positions. A fifth and a sixth cooling channel are respectively provided on this fifth groove. Air flows into the fifth cooling channel to exchange heat with the refrigerant in the third cooling channel at the third installation position, ensuring heat dissipation to the outside. Air flows into the sixth cooling channel to exchange heat with the refrigerant in the fourth cooling channel at the fourth installation position, also ensuring heat dissipation to the outside. This effectively removes heat from the A-axis and C-axis components of the AC oscillating head through the airflow in the fifth groove. Furthermore, combined with two compressors and two expansion valves, a closed internal refrigerant circulation loop is formed, ensuring continuous and effective heat dissipation during AC oscillating head operation, thus improving the heat dissipation efficiency of the AC oscillating head.

[0052] In some implementations... The fifth groove 40 extends vertically upward to the second installation position 32, and extends horizontally to the A-axis mounting surface of the AC swing head housing 1, the A-axis mounting surface being located above the first installation position 31; the fifth cooling channel includes multiple parallel and interconnected fifth sub-channels, the third cooling channel includes multiple parallel and interconnected third sub-channels, the fifth sub-channel and the third sub-channel are at an angle of 45°~135°, the sixth cooling channel includes multiple parallel and interconnected sixth sub-channels, the fourth cooling channel includes multiple parallel and interconnected fourth sub-channels, the sixth sub-channel and the fourth sub-channel are at an angle of 45°~135°; The third cooling channel 38 and the fifth cooling channel 41 are part of the solid structure of the AC oscillating head box 1. The third cooling channel 38 and the fifth cooling channel 41 transfer heat through this part of the solid structure. The fourth cooling channel 39 and the sixth cooling channel 42 are also part of the solid structure of the AC oscillating head box 1. The fourth cooling channel 39 and the sixth cooling channel 42 transfer heat through this part of the solid structure.

[0053] This is a preferred structural form of the fifth tank of this utility model, as well as a preferred structural form of the third, fourth, fifth, and sixth cooling channels. Setting the third and fifth sub-channels at an angle of 45° to 135° can further improve the heat exchange effect, making it easier for the heated air to flow out from the top. The third and fifth cooling channels transfer heat through the solid part of the box, which can improve the heat exchange effect between the refrigerant and the air. The fourth and sixth cooling channels transfer heat through the solid part of the box, which can improve the heat exchange effect between the refrigerant and the air.

[0054] In some implementations... The AC oscillating head housing 1 is also provided with a first air inlet 52, a first air outlet 53, a second air inlet 54, and a second air outlet 55. The first air inlet 52 extends from the upper end of the AC oscillating head housing 1 to the inlet end of the fifth cooling channel 41. The first air outlet 53 extends from the upper end of the AC oscillating head housing 1 to the outlet end of the fifth cooling channel 41. The second air inlet 54 extends from the upper end of the AC oscillating head housing 1 to the inlet end of the sixth cooling channel 42. The second air outlet 55 extends from the upper end of the AC oscillating head housing 1 to the outlet end of the sixth cooling channel 42.

[0055] Furthermore, the present invention further facilitates the introduction of air from the outside into the fifth cooling channel through the first air inlet and the first air outlet provided on the AC oscillating head box, and the air after heat exchange is discharged from the first air outlet. The second air inlet and the second air outlet provided on the AC oscillating head box facilitate the introduction of air from the outside into the sixth cooling channel, and the air after heat exchange is discharged from the second air outlet.

[0056] In some implementations... It also includes expansion valve A21 and expansion valve C43. Expansion valve A21 is connected between the outlet of the third cooling channel 38 and the inlet of the first cooling channel 33, so that the refrigerant after releasing heat through the third cooling channel 38 enters the expansion valve A21 for expansion and throttling, and then enters the first cooling channel 33 to absorb heat. The expansion valve C43 is connected between the outlet of the fourth cooling channel 39 and the inlet of the second cooling channel 34, so that the refrigerant after releasing heat through the fourth cooling channel 39 enters the expansion valve C43 for expansion and throttling, and then enters the second cooling channel 34 to absorb heat.

[0057] This invention further connects the two compressors A and C, as well as the first and second cooling channels and the third and fourth cooling channels, to form a dual-compressor and dual-throttling refrigerant circulation system. This effectively forms a closed-loop structure inside the oscillating head, allowing for independent cooling of the direct-drive motor positions on the A and C axes of the oscillating head. This avoids the problems of rotary sealing and pipeline layout caused by the need to connect the cooling channels to an external system in traditional cooling methods. This invention proposes a dual-compressor refrigerant cooling method inside the oscillating head, forming a multi-stage compression system, thereby achieving efficient and rapid cooling of the motor position and improving the cooling and heat dissipation efficiency of the oscillating head.

[0058] In some implementations... The expansion valve A21 is also located at the third mounting position 36, and the expansion valve C43 is also located at the fourth mounting position 37. When the second cooling channel 34 includes a first flow channel 48 located between the inner and outer walls of the C-axis rotating shaft 9 and a second flow channel 49 located on the outer wall of the C-axis rotating shaft 9: The AC oscillating head housing 1 is also provided with a first connecting channel 44, a second connecting channel 45, a connecting hole A46, and a connecting hole C47. One end of the first connecting channel 44 is connected to the inlet end of the compressor A17, and the other end of the first connecting channel 44 is connected to the outlet end of the first flow channel 48 through the connecting hole A46. One end of the second connecting channel 45 is connected to the outlet end of the expansion valve C43, and the other end of the second connecting channel 45 is connected to the inlet end of the first flow channel 48 through the connecting hole C47.

[0059] This utility model describes the connection between the expansion valve C, which is installed inside the swing shaft housing and connected to the C-axis assembly. The compressor A is connected to the second cooling channel (the first flow channel in the second cooling channel) through the first connecting channel, and the expansion valve C is connected to the second cooling channel (the first flow channel in the second cooling channel) through the second connecting channel, forming a closed loop connection structure for the C-axis assembly.

[0060] In some implementations... When the first mounting position 31 includes a structure with a first mounting groove, and the first cooling channel 33 is provided on the inner wall of the first mounting groove: At least one first cooling channel 33 is provided on the inner wall of the first mounting slot. The AC swing head box 1 is also provided with a third connecting channel 50 and a fourth connecting channel 51. One end of the third connecting channel 50 is connected to the outlet end of the expansion valve A21, and the other end of the third connecting channel 50 is connected to the inlet end of the first cooling channel 33. One end of the fourth connecting channel 51 is connected to the inlet end of the compressor C35, and the other end of the fourth connecting channel 51 is connected to the outlet end of the first cooling channel 33.

[0061] This utility model describes the connection structure of the expansion valve A inside the swing shaft housing and connected to the A-axis assembly. The expansion valve A is connected to the first cooling channel through the third connecting channel, and the compressor C is connected to the first cooling channel through the fourth connecting channel, forming a closed loop connection structure for the A-axis assembly.

[0062] like Figure 6 The working principle of this utility model is shown in the figure. When the refrigerant passes through the heat source of the motor on axis A, the refrigerant changes from a low-pressure, low-temperature state to a low-pressure, high-temperature state. Then, it passes through compressor C and changes to a high-pressure, high-temperature state. After passing through the refrigerant cooling channel and the external cooling air channel, it radiates heat at the support feet of the housing to lower the refrigerant temperature. Figures 3a-3bThe high-temperature, high-pressure refrigerant from the compressor flows through the sixth cooling channel 42. The sixth cooling channel 42 forms an angle of 45°-135° with the fourth cooling channel 39, exchanging heat with the cooling air connected to it (the fifth cooling channel 41 has the same structure and function as the sixth cooling channel 42). This process transforms the high-temperature, high-pressure refrigerant into a low-temperature, high-pressure refrigerant, and the C-axis motor follows the same principle. Continuing through the expansion valve C, it transforms into a low-pressure, low-temperature state, further cooling the C-axis motor's heat source, transforming it into a low-pressure, high-temperature state. Passing through compressor A, it transforms into a high-pressure, high-temperature state, and then through the expansion valve again, transforming into a low-pressure, low-temperature state. This process is repeated to achieve a cycle. The refrigerant circulation power in the closed loop is generated by two compressors connected in series.

[0063] like Figures 3a-3b and Figure 5 The cooling method for the C-axis is further explained as follows: The high-pressure, high-temperature refrigerant generated by compressor A is converted into a low-pressure, low-temperature state through expansion valve A. It then flows through the air inlet of the housing flow channel, passes through the heating area of ​​the A-axis motor, undergoes heat exchange, and is converted back into a low-pressure, high-temperature state. After that, it flows into compressor C through the air outlet. After the compressor performs work, it is converted back into a high-pressure, high-temperature state. Then, it expands through expansion valve C and is converted back into a low-pressure, low-temperature state. Finally, it flows into the A-axis shaft through connection hole C.

[0064] like Figure 4 , 5 6. Supplementary explanation of the cooling method for the A-axis: As shown in the figure, the air inlet and outlet of the A-axis shaft are connected to the connecting holes C and A on the housing, respectively. The low-pressure, low-temperature refrigerant generated by the expansion valve C flows into the air inlet of the shaft through the connecting hole C47, flows through the heating area of ​​the C-axis motor, undergoes heat exchange, cools the heating area of ​​the motor, and is converted into a low-pressure, high-temperature refrigerant. Then, it flows through the air outlet on the shaft, through the connecting hole A46, and enters the compressor A. After being converted into a high-pressure, high-temperature state by the compressor A, it continues to circulate in the flow channel.

[0065] This utility model also provides a CNC machine tool, which includes the aforementioned AC swing head with a cooling system.

[0066] The improvement of this utility model is as follows: 1. This utility model proposes a cooling circuit structure inside the oscillating head, which adopts a closed loop circuit structure and combines a dual-compressor refrigerant circulation system to independently cool the direct drive motor positions of the A and C axes of the oscillating head, thus avoiding the problems of rotary sealing and pipeline layout caused by the need for the cooling channel to be connected to an external system in traditional cooling methods. 2. This utility model proposes a dual-compressor refrigerant cooling method inside the oscillating head, which has two compressors connected in series in a cooling circuit to form a two-stage compression cycle system, thereby achieving efficient and rapid cooling of the motor position; 3. This utility model proposes a cooling air cooling channel, which ensures the heat dissipation of the refrigerant through radiation with the refrigerant channel. To ensure sufficient cooling, the two channels are at an angle of 45°-135°, which facilitates heat dissipation.

[0067] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. An AC oscillating head with a cooling system, characterized in that: include: The AC oscillating head housing (1), A-axis assembly (100), and C-axis assembly (200) are provided. The AC oscillating head housing (1) has a first mounting position (31), and the A-axis assembly (100) is mounted and fixed to the first mounting position (31). The AC oscillating head housing (1) has a second mounting position (32), and the C-axis assembly (200) is mounted and fixed to the second mounting position (32). A first cooling channel (33) is also provided at the first mounting position (31) and / or on the A-axis assembly (100). The first cooling channel (33) can circulate refrigerant fluid to dissipate heat and cool the A-axis assembly (100). A second cooling channel (34) is also provided at the second mounting position (32) and / or on the C-axis assembly (200). The second cooling channel (34) can circulate refrigerant fluid to dissipate heat and cool the C-axis assembly (200).

2. The AC oscillating head with a cooling system according to claim 1, characterized in that: It also includes compressor A (17) and compressor C (35). The AC swing head box (1) also has a third installation position (36) and a fourth installation position (37). The compressor A (17) is located at the third installation position (36) and can communicate with the first cooling channel (33) to provide refrigerant fluid to the first cooling channel (33). The compressor C (35) is located at the fourth installation position (37) and can communicate with the second cooling channel (34) to provide refrigerant fluid to the second cooling channel (34).

3. The AC oscillating head with a cooling system according to claim 2, characterized in that: The first mounting position (31) includes a first mounting groove structure, at least a portion of the structure of the A-axis assembly (100) is inserted into the first mounting groove, and the first cooling channel (33) is provided on the inner wall of the first mounting groove. The refrigerant from the outlet of the compressor A (17) can flow into the first cooling channel (33) to exchange heat with the A-axis assembly (100) in the first cooling channel (33).

4. The AC oscillating head with a cooling system according to claim 2, characterized in that: The second mounting position (32) includes a structure with a second mounting groove in which at least a portion of the C-axis assembly (200) is inserted. The C-axis assembly (200) includes a C-axis shaft (9) on which a second cooling channel (34) is provided. The refrigerant from the outlet of the compressor C (35) can flow into the second cooling channel (34) to exchange heat with the C-axis assembly (200) in the second cooling channel (34).

5. The AC oscillating head with a cooling system according to claim 4, characterized in that: The second cooling channel (34) includes a first flow channel (48) located between the inner and outer walls of the C-axis shaft (9) and a second flow channel (49) located on the outer wall of the C-axis shaft (9). The inlet end of the first flow channel (48) can communicate with the compressor C (35), and the outlet end of the first flow channel (48) can communicate with the compressor A (17). The second flow channel (49) communicates with the first flow channel (48), and there is at least one second flow channel (49).

6. The AC oscillating head with a cooling system according to claim 2, characterized in that: The third installation position (36) is a third installation slot structure. A third cooling channel (38) is provided on one side wall of the third installation slot. The refrigerant from the outlet of the compressor A (17) flows into the third cooling channel (38) to release heat in the third cooling channel (38). The fourth installation position (37) is a fourth installation slot structure. A fourth cooling channel (39) is provided on one side wall of the fourth installation slot. The refrigerant from the outlet of the compressor C (35) flows into the fourth cooling channel (39) to release heat in the fourth cooling channel (39).

7. The AC oscillating head with a cooling system according to claim 6, characterized in that: The AC swing head box (1) is also provided with a fifth slot (40), which is located between the third mounting slot and the fourth mounting slot. The fifth slot (40) includes a first side wall and a second side wall. The first side wall is closer to the third cooling channel (38) relative to the second side wall, and the second side wall is closer to the fourth cooling channel (39) relative to the first side wall. A fifth cooling channel (41) is provided on the first side wall. The fifth cooling channel (41) can circulate air so as to exchange heat with the refrigerant in the third cooling channel (38). A sixth cooling channel (42) is provided on the second side wall. Air can circulate in the sixth cooling channel (42) so as to exchange heat with the refrigerant in the fourth cooling channel (39).

8. The AC oscillating head with a cooling system according to claim 7, characterized in that: The fifth groove (40) extends vertically upward to the second installation position (32), and the fifth groove (40) extends horizontally to the A-axis mounting surface of the AC swing head box (1), the A-axis mounting surface being located above the first installation position (31); the fifth cooling channel (41) includes multiple parallel and interconnected fifth sub-channels, the third cooling channel (38) includes multiple parallel and interconnected third sub-channels, the fifth sub-channel and the third sub-channel are at an angle of 45°~135°, the sixth cooling channel (42) includes multiple parallel and interconnected sixth sub-channels, the fourth cooling channel (39) includes multiple parallel and interconnected fourth sub-channels, the sixth sub-channel and the fourth sub-channel are at an angle of 45°~135°; The third cooling channel (38) and the fifth cooling channel (41) are the solid structure of the AC oscillating head box (1). The third cooling channel (38) and the fifth cooling channel (41) transfer heat through this solid structure. The fourth cooling channel (39) and the sixth cooling channel (42) are also the solid structure of the AC oscillating head box (1). The fourth cooling channel (39) and the sixth cooling channel (42) transfer heat through this solid structure.

9. The AC oscillating head with a cooling system according to claim 8, characterized in that: The AC oscillating head box (1) is also provided with a first air inlet (52), a first air outlet (53), a second air inlet (54), and a second air outlet (55). The first air inlet (52) extends from the upper end of the AC oscillating head box (1) to the inlet end of the fifth cooling channel (41). The first air outlet (53) extends from the upper end of the AC oscillating head box (1) to the outlet end of the fifth cooling channel (41). The second air inlet (54) extends from the upper end of the AC oscillating head box (1) to the inlet end of the sixth cooling channel (42). The second air outlet (55) extends from the upper end of the AC oscillating head box (1) to the outlet end of the sixth cooling channel (42).

10. The AC oscillating head with a cooling system according to claim 6, characterized in that: It also includes expansion valve A (21) and expansion valve C (43). Expansion valve A (21) is connected between the outlet of the third cooling channel (38) and the inlet of the first cooling channel (33), so that the refrigerant after releasing heat through the third cooling channel (38) enters the expansion valve A (21) for expansion and throttling, and then enters the first cooling channel (33) for heat absorption. The expansion valve C (43) is connected between the outlet of the fourth cooling channel (39) and the inlet of the second cooling channel (34), so that the refrigerant after releasing heat through the fourth cooling channel (39) enters the expansion valve C (43) for expansion and throttling, and then enters the second cooling channel (34) for heat absorption.

11. The AC oscillating head with a cooling system according to claim 10, characterized in that: The expansion valve A (21) is also located in the third installation position (36), and the expansion valve C (43) is also located in the fourth installation position (37). When the C-axis assembly (200) includes a C-axis pivot (9), and the second cooling channel (34) includes a first flow channel (48) located between the inner and outer walls of the C-axis pivot (9) and a second flow channel (49) located on the outer wall of the C-axis pivot (9): The AC oscillating head box (1) is also provided with a first connecting channel (44), a second connecting channel (45), a connecting hole A (46) and a connecting hole C (47). One end of the first connecting channel (44) is connected to the inlet end of the compressor A (17), and the other end of the first connecting channel (44) is connected to the outlet end of the first flow channel (48) through the connecting hole A (46). One end of the second connecting channel (45) is connected to the outlet end of the expansion valve C (43), and the other end of the second connecting channel (45) is connected to the inlet end of the first flow channel (48) through the connecting hole C (47).

12. The AC oscillating head with a cooling system according to claim 10, characterized in that: When the first mounting position (31) includes a structure with a first mounting groove, and the first cooling channel (33) is provided on the inner wall of the first mounting groove: At least one first cooling channel (33) is provided on the inner wall of the first mounting slot. The AC swing head box (1) is also provided with a third connecting channel (50) and a fourth connecting channel (51). One end of the third connecting channel (50) is connected to the outlet end of the expansion valve A (21), and the other end of the third connecting channel (50) is connected to the inlet end of the first cooling channel (33). One end of the fourth connecting channel (51) is connected to the inlet end of the compressor C (35), and the other end of the fourth connecting channel (51) is connected to the outlet end of the first cooling channel (33).

13. A CNC machine tool, characterized in that: Includes an AC oscillating head with a cooling system as described in any one of claims 1-12.

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