Tool changing spindle with lubricating, cooling and self-supplying structure

Abstract

The invention relates to a tool changing spindle with a lubricating, cooling and self-supplying structure, which comprises a tool changing spindle main body and an oil return shell mounted at the top of the tool changing spindle main body, a rotating shaft is rotatably mounted in the tool changing spindle main body through a first bearing, and a cooling cavity is formed in the side wall of the tool changing spindle main body; a self-lubricating unit is arranged in the tool changing main shaft main body; according to the tool changing spindle, the rotating shaft is linked with the self-lubricating unit, lubricating oil is promoted to conduct self-circulation supply type flowing lubricating treatment in the tool changing spindle body, internal particle impurities are intercepted and cleaned, and the cleanliness of the lubricating oil is guaranteed so that the efficient lubricating effect can be achieved; and the cutting fluid is discharged through pressurization of the cutting fluid in the cooling cavity and the cooling seat, so that not only can the tool changing main shaft main body be subjected to comprehensive wrapping type cooling treatment, but also heat carried in the circulating flowing lubricating oil can be subjected to heat exchange cooling treatment, and then the effect of combining efficient and comprehensive lubricating and cooling is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of spindle lubrication, and particularly to a tool-changing spindle with a self-supplying structure for lubrication and cooling. Background Art

[0002] CNC (Computer Numerical Control) machine tools are core equipment in modern manufacturing, achieving automated processing through program control. Among them, the tool-changing spindle, as a key component of the machine tool, undertakes the tasks of rapid tool change and precise rotation. During high-speed and high-precision machining processes, the performance of the tool-changing spindle directly affects the machining efficiency and the quality of finished products.

[0003] For example, a spindle device for a numerical control machine tool with the publication number CN221184723U. This spindle, through the lubrication waterway and cooling waterway arranged inside, can cool and quantitatively lubricate the bearing structure, improving the service life of the spindle. However, with the injection-type lubrication treatment that only allows inflow and no outflow, it is difficult to quickly clean the large amount of waste lubricating oil accumulated later, and it is impossible to synchronously clean the impurities contained in the lubricating oil, thereby reducing the lubrication effect of the lubricating oil. In addition, it is also inconvenient to efficiently cool the heat contained in the lubricating oil, and it is impossible to further improve the overall cooling effect of the spindle. Summary of the Invention

[0004] The purpose of the present invention is to provide a tool-changing spindle with a self-supplying structure for lubrication and cooling to solve the above-mentioned technical defects.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A tool-changing spindle with a self-supplying structure for lubrication and cooling includes a tool-changing spindle main body and an oil return shell installed on the top of the tool-changing spindle main body. A rotating shaft is rotatably installed inside the tool-changing spindle main body through a bearing I, and a bearing II is installed between the rotating shaft and the oil return shell. A cooling cavity is provided on the side wall of the tool-changing spindle main body.

[0006] An independent lubrication unit is arranged inside the tool-changing spindle main body. The independent lubrication unit includes multiple L-shaped fixing blocks. The L-shaped fixing blocks are provided with oil suction cavities and clamping grooves adapted to the bearing I. A piston plate adapted to the oil suction cavity is slidably connected inside the oil suction cavity. Multiple oil suction pipes and oil return pipes are installed in the cooling cavity.

[0007] Preferably, a water inlet joint communicating with the cooling cavity is threadedly connected to the top of one side of the tool-changing spindle main body, and a rotating ring for blocking the cooling cavity is rotatably connected to the bottom in a sealed manner. A cooling seat in contact with the L-shaped fixing blocks is threadedly connected to the bottom inside the tool-changing spindle main body.

[0008] Preferably, a plurality of communicating pipes sliding with the cooling seat are fixedly connected to the rotating ring. The bottom of the cooling seat is connected to a liquid outlet pipe through a pressure stabilizing valve.

[0009] Preferably, a mounting groove compatible with the L-shaped fixing block is provided on the inner side wall of the tool changing spindle body, an oil suction port connected to the oil suction pipe is provided on one side of the oil suction chamber, and an oil suction one-way valve is installed on the inner thread of the oil suction port, and an oil outlet one-way valve connected to the oil suction chamber is installed on the outer side wall of the L-shaped fixing block.

[0010] Preferably, the cross-section of the mounting groove is a trapezoidal structure, and a sealing ring is embedded and installed on the mounting groove and located on the outer side of the oil suction pipe, and a sealing gasket is installed between the rotating ring and the cooling seat.

[0011] Preferably, the free end of the oil suction pipe passes through the outside of the tool changing spindle body and is rotatably connected to a filter cartridge, a filter screen is installed inside the filter cartridge, the oil return shell is threadedly connected to the filter cartridge, the oil return pipe is arranged between two adjacent groups of oil suction pipes, and both ends of the oil return pipe are respectively connected to the oil return shell and the interior of the tool changing spindle body.

[0012] Preferably, a through groove communicating with the interior of the tool changing spindle body is formed on the top of the tool changing spindle body, and a dustproof net is installed in the through groove.

[0013] Preferably, a movable rod sliding with the L-shaped fixed block is fixedly connected to one side of the piston plate, and a guide pin is fixedly connected to the movable rod, an I-shaped turntable is fixedly connected to the rotating shaft, and a cam groove matching the guide pin is opened on the inner side wall of the I-shaped turntable.

[0014] The beneficial effects of the present invention are as follows:

[0015] (1) The present invention is to rotate the workpiece turntable by the rotating shaft, and the movable rod is linked to cause the piston plate to move in the corresponding oil suction chamber, and the oil suction pipe and the oil return pipe are combined to cause the lubricating oil to flow and lubricate the bearing area and between the workpiece turntable and the movable rod in an autonomous circulation supply manner; and with the help of the flow of the lubricating oil, the particulate impurities generated by movement wear can be effectively taken away, and then intercepted and cleaned by the filter net in the filter cylinder, so as to ensure the cleanliness of the lubricating oil and achieve a high-efficiency lubrication effect; in addition, through the detachable installation of the filter cylinder, it is convenient to clean the intercepted particulate impurities, and the filter cylinder is brought into contact with new lubricating oil. Combined with the rotation of the rotating shaft, the waste lubricating oil inside the tool change spindle body can be squeezed out and replaced, so as to achieve the effect of easy replacement;

[0016] (2) The present invention also combines the cooling cavity provided on the inner wall of the tool-changing spindle body with the cooling seat, and after injecting cutting fluid into both of them, it is discharged in a pressurized manner through the pressure stabilizing valve and the liquid outlet pipe. On the one hand, it can achieve a comprehensive wrapped cooling treatment for the tool-changing spindle body. On the other hand, through the suction oil pipe and the return oil pipe passing through the inside of the cooling cavity, it can synchronously perform heat exchange and cooling treatment on the heat carried in the circulating lubricating oil, so as to achieve the effect of comprehensively cooling the heat generated by the moving structure. In addition, by virtue of the large-area contact between the cooling seat and the lubricating oil, it can perform secondary heat exchange and cooling treatment on the lubricating oil, further achieving the effect of combining efficient and comprehensive lubrication and cooling. Description of the Drawings

[0017] The present invention will be further described below with reference to the drawings;

[0018] Figure 1 is the structural schematic diagram of the present invention;

[0019] Figure 2 is the internal structural schematic diagram of the tool-changing spindle body of the present invention;

[0020] Figure 3 is the structural schematic diagram of the tool-changing spindle body of the present invention;

[0021] Figure 4 is the structural schematic diagram of the cooling seat of the present invention;

[0022] Figure 5 is the cooperation schematic diagram of the rotating shaft and the L-shaped fixing block of the present invention;

[0023] Figure 6 is the linkage schematic diagram of the I-shaped turntable and the L-shaped fixing block of the present invention;

[0024] Figure 7 is the structural schematic diagram of the self-lubricating unit of the present invention;

[0025] Figure 8 is the structural schematic diagram of the oil return shell of the present invention.

[0026] Legend Explanation:

[0027] 1. Tool-changing spindle body; 11. Rotating shaft; 12. Cooling cavity; 13. Water inlet joint; 14. Rotating ring; 15. Cooling seat; 16. Connecting pipe; 17. Pressure stabilizing valve; 18. Liquid outlet pipe; 19. Installation groove; 110. I-shaped turntable; 111. Cam groove;

[0028] 2. Oil return shell; 21. Suction oil pipe; 22. Return oil pipe; 23. Filter cylinder; 24. Filter screen;

[0029] 3. Self-lubricating unit; 31. L-shaped fixing block; 32. Oil suction cavity; 33. Piston plate; 34. Oil suction port; 35. Oil suction check valve; 36. Oil outlet check valve; 37. Moving rod; 38. Guide pin. Detailed implementation mode

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Embodiment 1: Please refer to Figures 1 - 8 As shown, in view of the problems in the prior art that it is difficult to quickly clean waste lubricating oil and it is impossible to clean the contained impurities, thereby reducing the lubrication effect of the lubricating oil, the following solutions can be adopted to solve the problems;

[0032] In this embodiment, a tool-changing spindle with a lubrication and cooling self-supply structure includes a tool-changing spindle main body 1 and an oil return shell 2 installed on the top of the tool-changing spindle main body 1 for oil return of the lubricating oil and impurity interception. A rotating shaft 11 is rotatably installed inside the tool-changing spindle main body 1 through a first bearing. A chuck for clamping the tool head is installed at the bottom of the rotating shaft 11;

[0033] The upper half of the tool-changing spindle main body 1 is a driving cavity, and the lower half is an installation cavity. The first bearing is located in the installation cavity. A stator is installed in the driving cavity, and a rotor cooperating with the stator is installed on the rotating shaft 11, so as to realize the rotation of the rotating shaft 11 carrying the tool head in combination with the chuck. A second bearing is installed between the rotating shaft 11 and the oil return shell 2. The provided second bearing assists the first bearing to improve the rotation stability of the rotating shaft 11. A cooling cavity 12 is opened on the side wall of the tool-changing spindle main body 1 for overall and comprehensive cooling treatment of the tool-changing spindle main body 1;

[0034] A self-lubricating unit 3 is arranged inside the tool-changing spindle main body 1. The self-lubricating unit 3 includes multiple groups of L-shaped fixing blocks 31, which are used to assist the installation of the first bearing and realize the supply process of the lubricating oil. An oil suction cavity 32 and a clamping groove cooperating with the first bearing are opened on the L-shaped fixing block 31. A suitable piston plate 33 is slidably connected in the oil suction cavity 32. Multiple groups of oil suction pipes 21 and oil return pipes 22 are installed in the cooling cavity 12 for realizing the flow of the lubricating oil between the installation cavity and the oil return shell 2.

[0035] On one side of the top of the tool-changing spindle body 1, a water inlet joint 13 communicating with the cooling cavity 12 is threadedly connected, and at the bottom, a rotating ring 14 for blocking the cooling cavity 12 is rotatably connected in a sealed manner. At the bottom inside the tool-changing spindle body 1, a cooling seat 15 in threaded connection with the L-shaped fixing block 31 is provided for fixing the L-shaped fixing block 31 inside the tool-changing spindle body 1.

[0036] On the inner side wall of the tool-changing spindle body 1, an installation groove 19 adapted to the L-shaped fixing block 31 is provided for the limit installation of the corresponding L-shaped fixing block 31, thereby improving the installation efficiency between the first bearing and the tool-changing spindle body 1. On one side of the oil suction cavity 32, an oil suction port 34 communicating with the oil suction pipe 21 is provided, and an oil suction check valve 35 is installed in the oil suction port 34 by internal threading. When the piston plate 33 moves towards the direction of the rotating shaft 11, a negative pressure is formed inside the oil suction cavity 32, and the lubricating oil is extracted in combination with the oil suction check valve 35.

[0037] An oil outlet check valve 36 communicating with the oil suction cavity 32 is installed on the outer side wall of the L-shaped fixing block 31. When the piston plate 33 moves away from the direction of the rotating shaft 11, the oil suction check valve 35 blocks the oil suction port 34, and the lubricating oil in the oil suction cavity 32 is discharged into the area of the first bearing inside the tool-changing spindle body 1 in combination with the oil outlet check valve 36, thereby performing heat lubrication treatment on the first bearing and between the I-shaped turntable 110 and the movable rod 37.

[0038] The cross-section of the installation groove 19 is in a trapezoidal structure. After the first bearing is sleeved on the rotating shaft 11, a plurality of L-shaped fixing blocks 31 are equidistantly distributed on the outside of the first bearing and engaged with the corresponding card slots. Then, the rotating shaft 11 is installed inside the tool-changing spindle body 1. Combining with the trapezoidal structure of the installation groove 19, the installation of the L-shaped fixing block 31 and the corresponding installation groove 19 is quickly completed. Then, through the installation of the cooling seat 15, the L-shaped fixing block 31 is abutted, and further the fixed installation treatment of the L-shaped fixing block 31 is completed.

[0039] And a sealing ring is embedded and installed on the installation groove 19 and located outside the oil suction pipe 21. After the L-shaped fixing block 31 is installed with the corresponding installation groove 19, the oil suction port 34 is aligned and communicated with the outlet of the corresponding oil suction pipe 21. The sealing ring is used to connect the sealing performance between the oil suction pipe 21 and the oil suction port 34. And the trapezoidal structure of the installation groove 19 can avoid the problem that the sealing ring drops after the L-shaped fixing block 31 is installed. A sealing gasket is installed between the rotating ring 14 and the cooling seat 15.

[0040] The free end of the oil suction pipe 21 penetrates to the outside of the tool-changing spindle body 1 and is rotatably connected with a filter cylinder 23. The filter cylinder 23 is installed below the second bearing. A filter screen 24 is installed inside the filter cylinder 23. The lubricating oil in the oil return shell 2 enters the filter cylinder 23, and the particulate impurities are intercepted by the internal filter screen 24 to ensure the cleanliness of the lubricating oil to achieve an efficient lubrication effect.

[0041] The oil return housing 2 is threadedly connected to the filter cartridge 23. Through the detachable installation of the filter cartridge 23, it is convenient to clean the intercepted particulate impurities and bring the filter cartridge 23 into contact with new lubricating oil. Combined with the rotation of the rotating shaft 11, the waste lubricating oil inside the tool changing spindle body 1 can be extruded and replaced, achieving the effect of easy replacement. The oil return pipe 22 is arranged between two adjacent oil suction pipes 21, and both ends of the oil return pipe 22 communicate with the inside of the oil return housing 2 and the tool changing spindle body 1 respectively;

[0042] The inlet of the oil return pipe 22 is located below the first bearing, so that the first bearing can be fully lubricated before the lubricating oil is discharged. The outlet of the oil return pipe 22 is located above the second bearing, so that the lubricating oil can fully lubricate the second bearing. The lubricating oil in the oil suction cavity 32 is discharged to the area of the first bearing inside the tool changing spindle body 1. By continuously filling the inside of the tool changing spindle body 1 with lubricating oil, the lubricating oil passes through the first bearing and then enters the oil return pipe 22, lubricating the first bearing and the area between the I-shaped turntable 110 and the movable rod 37, and taking away the particulate impurities generated by movement wear;

[0043] The lubricating oil in the tool changing spindle body 1 is discharged to the oil return housing 2 through the oil return pipe 22 and is located above the second bearing. By continuously filling the inside of the oil return housing 2 with lubricating oil, the reflux lubricating oil passes through the second bearing and then enters multiple filter cartridges 23, lubricating the second bearing and taking away the particulate impurities generated by movement wear, enabling the lubricating oil to be lubricated in a circulating flow manner, and the particulate impurities carried inside are intercepted by the filter screen 24 and collected inside the filter cartridge 23. The impurities on the filter screen 24 are cleaned by disassembling the filter cartridge 23.

[0044] A through groove communicating with its inside is opened at the top of the tool changing spindle body 1. The heat generated by the rotor and the stator can be partially discharged to the outside of the tool changing spindle body 1 through multiple through grooves, and a dust-proof net is installed in the through groove to prevent external dust and impurities from entering the inside of the tool changing spindle body 1.

[0045] A movable rod 37 slidably connected to the L-shaped fixing block 31 is fixedly connected to one side of the piston plate 33. The movable rod 37 drives the piston plate 33 to reciprocate in the corresponding oil suction cavity 32, and a guide pin 38 is fixedly connected to the movable rod 37. An I-shaped turntable 110 is fixedly connected to the rotating shaft 11. A cam groove 111 adapted to the guide pin 38 is opened on the inner side wall of the I-shaped turntable 110. When the rotating shaft 11 rotates, it drives the I-shaped turntable 110 to rotate synchronously. The rotating I-shaped turntable 110 guides the guide pin 38 through the opened cam groove 111, causing multiple movable rods 37 to drive the piston plates 33 to reciprocate and slide in the corresponding oil suction cavities 32;

[0046] Moreover, the initial moving positions of the multiple piston plates 33 are different from each other. When the multiple piston plates 33 reciprocate simultaneously, the corresponding oil suction pipes 21 and oil return pipes 22 are combined to achieve the effect of continuous cyclic flow of the lubricating oil, thereby improving the interception and cleaning effect of internal impurities. Moreover, the lubricating oil during the flowing process can synchronously perform self-lubrication treatment on the guide pins 38 and the cam grooves 111.

[0047] Embodiment 2: Please refer to Figures 1 - 4 As shown, for the problem that it is difficult to comprehensively cool down the main shaft, the following solution can be adopted;

[0048] On the top of one side of the tool-changing main shaft body 1 in this embodiment, a water inlet joint 13 communicated with the cooling cavity 12 is threadedly connected, which is used to inject coolant or cutting fluid into the cooling cavity 12. While cooling the tool-changing main shaft body 1, it assists in the cooling process during the machining of the tool head. The filtered cutting fluid is injected into the cooling cavity 12 to first perform a wrapped cooling treatment on the entire tool-changing main shaft body 1;

[0049] And through the oil suction pipe 21 and the oil return pipe 22 passing through the inside of the cooling cavity 12, the heat carried inside the circulating lubricating oil can be synchronously heat-exchanged and cooled to achieve the effect of comprehensively cooling the heat generated by the moving structure. And at the bottom, a rotating ring 14 for blocking the cooling cavity 12 is rotatably connected in a sealed manner. At the bottom inside the tool-changing main shaft body 1, a cooling seat 15 that abuts against the L-shaped fixing block 31 is threadedly connected. By filling the cooling seat 15 with cutting fluid and combining the contact between the top of the cooling seat 15 and the lubricating oil, secondary heat exchange and temperature reduction treatment are performed on the lubricating oil.

[0050] A plurality of communicating pipes 16 sliding with the cooling seat 15 are fixedly connected to the rotating ring 14. The cutting fluid in the cooling cavity 12 is injected into the inside of the cooling seat 15 through the plurality of communicating pipes 16. The bottom of the cooling seat 15 is connected to a liquid outlet pipe 18 through a pressure stabilizing valve 17. By combining the pressure stabilizing valve 17, it is ensured that the cutting fluid is fully filled and discharged in a pressurized manner inside the cooling cavity 12 and the cooling seat 15, further ensuring the comprehensive wrapped cooling treatment of the tool-changing main shaft body 1 by the cooling cavity 12 and the full filling of the cooling seat 15 with cutting fluid.

[0051] The cross-section of the installation groove 19 is trapezoidal, and a sealing ring is embedded and installed on the installation groove 19 and located outside the oil suction pipe 21. A sealing gasket is installed between the rotating ring 14 and the cooling seat 15. The provided sealing gasket is used to increase the sealing performance between the cooling seat 15 and the rotating ring 14, thereby ensuring to avoid the problem of leakage of cutting fluid and lubricating oil.

[0052] Embodiment 3: Please refer to Figures 1 - 8 As shown, the present invention also proposes a use method of a tool-changing main shaft with a lubrication and cooling self-supply structure, including the following steps:

[0053] Step 1: When the rotating shaft 11 rotates, it drives the I-shaped turntable 110 to rotate synchronously. The rotating I-shaped turntable 110 guides the guide pin 38 through the cam groove 111 opened thereon, causing multiple movable rods 37 to carry the piston plate 33 to reciprocate in the corresponding oil suction chamber 32. When the piston plate 33 moves towards the rotating shaft 11, a negative pressure is formed inside the oil suction chamber 32. In combination with the oil suction check valve 35 and the corresponding oil suction pipe 21, the lubricating oil in the oil return shell 2 is extracted. When the piston plate 33 moves away from the rotating shaft 11, the lubricating oil in the oil suction chamber 32 is discharged into the bearing one area in the tool change spindle main body 1 through the oil outlet check valve 36. By continuously filling the lubricating oil into the tool change spindle main body 1, the lubricating oil passes through the bearing one and then enters the oil return pipe 22, lubricating the bearing one and the area between the I-shaped turntable 110 and the movable rod 37, and taking away the particulate impurities generated by movement wear;

[0054] Step 2: The lubricating oil in the tool change spindle main body 1 is discharged into the oil return shell 2 through the oil return pipe 22 and is located above the bearing two. By continuously filling the lubricating oil into the oil return shell 2, the reflux lubricating oil passes through the bearing two and then enters multiple filter cartridges 23, lubricating the bearing two and taking away the particulate impurities generated by movement wear. Furthermore, the lubricating oil is subjected to a circulating flow lubrication treatment, and the particulate impurities carried inside are intercepted by the filter screen 24 into the filter cartridge 23. The impurities on the filter screen 24 are cleaned by disassembling the filter cartridge 23;

[0055] Step 3: The heat generated by the rotor and the stator can be discharged to the outside of the tool change spindle main body 1 through multiple through slots. Connect the water inlet joint 13 to an external connecting pipe, and inject the filtered cutting fluid into the cooling cavity 12. First, perform a wrapped cooling treatment on the entire tool change spindle main body 1, and perform a heat exchange treatment on the heat carried inside the circulating flow lubricating oil, so as to perform a comprehensive cooling treatment on the heat generated by the drive structure;

[0056] Step 4: The cutting fluid in the cooling cavity 12 is injected into the cooling seat 15 through multiple connecting pipes 16 and discharged through the liquid outlet pipe 18 to assist in cooling the tool bit. In combination with the pressure stabilizing valve 17, it is ensured that the cutting fluid is fully filled and discharged under pressure inside the cooling cavity 12 and the cooling seat 15, further ensuring the comprehensive wrapped cooling treatment of the tool change spindle main body 1 by the cooling cavity 12. And by fully filling the cooling seat 15 with the cutting fluid, combined with the contact between the top of the cooling seat 15 and the lubricating oil, a secondary heat exchange cooling treatment is performed, further achieving the effect of combining efficient and comprehensive lubrication and cooling.

[0057] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A tool-changing spindle with a self-supplying lubrication and cooling structure, comprising a tool-changing spindle body (1) and an oil return housing (2) installed on the top of the tool-changing spindle body (1), characterized in that, Inside the tool-changing spindle body (1), a rotating shaft (11) is rotatably installed through a first bearing, and a second bearing is installed between the rotating shaft (11) and the oil return housing (2). A cooling cavity (12) is formed on the side wall of the tool-changing spindle body (1). An independent lubrication unit (3) is arranged inside the tool-changing spindle body (1). The independent lubrication unit (3) includes multiple groups of L-shaped fixing blocks (31). An oil suction cavity (32) and a clamping groove adapted to the first bearing are formed on the L-shaped fixing blocks (31). A piston plate (33) adapted thereto is slidably connected inside the oil suction cavity (32). Multiple groups of oil suction pipes (21) and oil return pipes (22) are installed inside the cooling cavity (12).

2. The tool-changing spindle with a self-supplying lubrication and cooling structure according to claim 1, characterized in that, On one side top of the tool-changing spindle body (1), a water inlet joint (13) communicating with the cooling cavity (12) is threadedly connected, and at the bottom, a rotating ring (14) for blocking the cooling cavity (12) is rotatably connected in a sealed manner. At the bottom inside the tool-changing spindle body (1), a cooling seat (15) abutting against the L-shaped fixing block (31) is threadedly connected.

3. The tool-changing spindle with a self-supplying lubrication and cooling structure according to claim 2, characterized in that, Multiple communicating pipes (16) sliding with the cooling seat (15) are fixedly connected to the rotating ring (14). The bottom of the cooling seat (15) is connected to a liquid outlet pipe (18) through a pressure stabilizing valve (17).

4. The tool-changing spindle with a self-supplying lubrication and cooling structure according to claim 3, characterized in that, An installation groove (19) adapted to the L-shaped fixing block (31) is formed on the inner side wall of the tool-changing spindle body (1). An oil suction port (34) communicating with the oil suction pipe (21) is formed on one side of the oil suction cavity (32). An oil suction one-way valve (35) is threadedly installed inside the oil suction port (34). An oil outlet one-way valve (36) communicating with the oil suction cavity (32) is installed on the outer side wall of the L-shaped fixing block (31).

5. The tool-changing spindle with a self-supplying lubrication and cooling structure according to claim 4, characterized in that, The cross-section of the installation groove (19) is in a trapezoidal structure, and a sealing ring is embedded and installed on the installation groove (19) and outside the oil suction pipe (21). A sealing gasket is installed between the rotating ring (14) and the cooling seat (15).

6. The tool-changing spindle with a self-supplying lubrication and cooling structure according to claim 1, characterized in that, The free end of the oil suction pipe (21) penetrates to the outside of the tool-changing spindle body (1) and is rotatably connected to a filter cartridge (23). A filter screen (24) is installed inside the filter cartridge (23). The oil return housing (2) is threadedly connected to the filter cartridge (23). The oil return pipe (22) is arranged between two adjacent groups of oil suction pipes (21), and both ends of the oil return pipe (22) communicate with the inside of the oil return housing (2) and the tool-changing spindle body (1) respectively.

7. The tool-changing spindle with a self-supplying lubrication and cooling structure according to claim 6, characterized in that, A through groove communicating with its inside is formed at the top of the tool-changing spindle body (1), and a dust-proof net is installed inside the through groove.

8. The tool-changing spindle with a self-supplying lubrication and cooling structure according to claim 1, characterized in that, One side of the piston plate (33) is fixedly connected to a movable rod (37) sliding with the L-shaped fixing block (31), and a guide pin (38) is fixedly connected to the movable rod (37). An I-shaped turntable (110) is fixedly connected to the rotating shaft (11). A cam groove (111) adapted to the guide pin (38) is formed on the inner side wall of the I-shaped turntable (110).

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