Full-static-pressure ultra-precise double-end main shaft

Abstract

The invention discloses a full-static-pressure ultra-precise double-head spindle, which relates to the technical field of machine tool spindles and comprises a mandrel, a shaft sleeve is fixedly connected to the outer surface of the mandrel, a spindle equipment compartment is rotatably connected to the outer surface of the shaft sleeve, a synchronous pulley is fixedly connected to one side of the outer surface of the shaft sleeve, and a transmission assembly is in transmission connection to the synchronous pulley. The synchronous belt wheel is sleeved with a belt cover, the belt cover is fixedly connected into the main shaft equipment compartment body, and a transmission assembly looseness abnormity early warning mechanism is arranged in the belt cover and can automatically trigger an alarm to remind workers when the transmission assembly is loosened. The situation that the core shaft breaks down due to the fact that the transmission assembly falls off and is broken can be reduced, the maintenance cost of the core shaft is reduced, the service life of the core shaft is prolonged, the situation that vibration and noise are generated when the core shaft works under the abnormal condition of the transmission assembly can be avoided, the stability of the core shaft in the operation process is guaranteed, and the service life of the core shaft is prolonged. Therefore, the product grinding precision and quality of the mandrel are improved.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool spindles, in particular to a fully static pressure ultra-precision double-head spindle. Background Art

[0002] The double-headed spindle is used for turning of shaft parts. It is mainly installed on turning machine tools. Ultra-precision machining is achieved through high-precision design and manufacturing technology. The core of the ultra-precision double-headed spindle lies in its double-spindle structure. This design enables the turning machine tool to process two workpieces or perform two different processes at the same time, such as drilling, tapping and milling, thereby improving machining efficiency.

[0003] When the double-headed spindle rotates, it is usually driven by a belt or chain transmission component. When the belt and chain work for a long time, they are affected by some factors (for example, the friction and stretching of the belt and chain will gradually wear, resulting in an increase in length and then loosening, or the vibration generated by the double-headed spindle during operation causes the fastening device of the belt or chain to loosen), which will cause the belt and chain to loosen during the transmission process with the double-headed spindle. At this time, if the staff cannot understand the abnormal situation of the belt or chain in time, the loose belt or chain will not only easily rub or collide with the surrounding parts when running at high speed, causing damage to these parts, but as the looseness increases, the belt will suddenly fall off or break, posing a serious threat to the double-headed spindle and personnel, and the loose belt or chain will increase the energy loss in the transmission process, reduce the transmission efficiency, and generate vibration and noise, making the double-headed spindle unstable during operation, affecting the accuracy and quality of product grinding.

[0004] Therefore, the present invention proposes a fully hydrostatic ultra-precision double-headed spindle to solve the above problems. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies of the prior art, the present invention provides a fully static pressure ultra-precision double-headed spindle, which can effectively solve the problem of loosening of the transmission components of the double-headed spindle in the prior art.

[0007] (II) Technical solution

[0008] To achieve the above object, the object of the present invention can be achieved by the following technical solutions:

[0009] A fully static pressure ultra-precision double-headed spindle comprises a core shaft, a shaft sleeve is fixedly connected to the outer surface of the core shaft, a spindle equipment body is rotatably connected to the outer surface of the shaft sleeve, a synchronous pulley is fixedly connected to one side of the outer surface of the shaft sleeve, a transmission assembly is transmission-connected to the synchronous pulley, a belt cover is provided on the outer shell of the synchronous pulley, the belt cover is fixedly connected to the spindle equipment body, a transmission assembly loosening abnormal warning mechanism is arranged inside the belt cover, and the transmission assembly loosening abnormal warning mechanism is used to monitor whether the transmission assembly connected to the outer surface of the synchronous pulley is loose during operation.

[0010] As a further solution of the present invention: the abnormal warning mechanism for loosening of the transmission component includes a vertical plate, the vertical plate is fixedly connected to the belt cover, and vertical grooves are symmetrically opened on the side of the vertical plate away from the spindle equipment body, and lifting blocks are slidably connected in the vertical grooves. The lifting blocks are rotatably connected to a connecting shaft on the side away from the vertical plate, and a tensioning wheel is fixedly connected to the connecting shaft.

[0011] As a further solution of the present invention: the lifting block is fixedly connected to a support column on one opposite side, a hollow column is sleeved on the outer surface of the support column, the support column is slidably connected to the hollow column, the hollow column is fixedly connected in a vertical groove, and a spring is fixedly connected between the support column and the hollow column.

[0012] As a further solution of the present invention: buttons are provided on the side of the lifting block away from the support column, the buttons are fixedly connected in the vertical groove, alarms are electrically connected between the buttons, and the alarms are fixedly connected to the side walls of the vertical plates.

[0013] As a further solution of the present invention: a thrust ring is fixedly connected to the outer ring of the core shaft, chucks are provided on both sides of the core shaft, a collet is fixedly connected between the chucks, thread grooves are symmetrically provided on the inner wall of the core shaft, a linkage piston is fixedly connected to one end of the collet, and a 30-degree angle is set between the linkage piston and both ends of the core shaft.

[0014] As a further solution of the present invention: a first airtight ring and a second airtight ring are respectively arranged on both sides of the shaft sleeve, the first airtight ring and the second airtight ring are both fixedly connected to the spindle equipment body, a retaining ring is fixedly connected to the side of the synchronous pulley away from the spindle equipment body, the retaining ring is fixedly connected to the belt cover, a cover plate is fixedly connected to the belt cover, and a first airtight groove, a second airtight groove and a third airtight groove are opened on the shaft sleeve.

[0015] As a further solution of the present invention: a first axial oil chamber surface, a first radial oil chamber surface, a second radial oil chamber surface and a second axial oil chamber surface are provided in the sleeve, the first axial oil chamber surface and the second axial oil chamber surface are located on both sides, the first radial oil chamber surface and the second radial oil chamber surface are located between the first axial oil chamber surface and the second axial oil chamber surface, and an oil floating gap is provided in the sleeve.

[0016] As a further solution of the present invention: a first oil unloading port and a second oil unloading port are respectively provided on the shaft sleeve, a first row of oil grooves, a second row of oil grooves and a third row of oil grooves are provided in the shaft sleeve, and the first row of oil grooves, the second row of oil grooves and the third row of oil grooves are all connected to the first oil unloading port and the second oil unloading port.

[0017] As a further solution of the present invention: a piston feed oil circuit and a piston feed oil circuit are respectively opened on the linkage piston, a feed oil chamber and a feed oil chamber are respectively arranged on both sides of the linkage piston, and the feed oil chamber and the feed oil chamber are both opened on the shaft sleeve.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the present invention provides a fully hydrostatic ultra-precision double-headed spindle, which has the following beneficial effects:

[0020] 1. By setting up an abnormal early warning mechanism for loose transmission components, the alarm can be automatically triggered to remind the staff when the transmission components become loose. This can not only reduce the failure of the spindle caused by sudden situations such as the shedding and breakage of the transmission components, thereby reducing the maintenance cost of the spindle and extending the service life of the spindle, but also avoid the vibration and noise caused by the spindle working under abnormal conditions of the transmission components, thereby ensuring the stability of the spindle during operation, thereby improving the grinding accuracy and quality of the spindle for the product.

[0021] 2. The spring provided can push the tension wheel to move relative to the transmission component when it becomes loose, thus maintaining the tension of the transmission component. This not only ensures that the transmission component always maintains proper tension and reduces the instability of the rotation transmission caused by the looseness of the mandrel, but also maintains proper tension of the transmission component to reduce the relative sliding between the transmission component and the synchronous pulley, thereby reducing the wear rate and extending the service life of the transmission component and the synchronous pulley.

[0022] 3. Through the setting of the linkage piston, the displacement of the linkage piston is controlled by full hydraulic pressure. Compared with the use of the return spring, it has a greater thrust and will not have functional failures. It can be used for both turning and grinding. It can be installed on a lathe as a double-headed turning spindle, and can also be installed on a grinder as a double-headed grinder, which expands the application range of the core shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the internal structure of the belt cover of the present invention;

[0026] Figure 3 This is a schematic diagram of the vertical plate connection structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the connection structure between the support column and the hollow column of the present invention;

[0028] Figure 5 For the present invention Figure 1 Schematic diagram of transverse cross-section structure;

[0029] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of the middle A area;

[0030] Figure 7 For the present invention Figure 1 Longitudinal cross-sectional structural diagram;

[0031] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure of area B in the middle.

[0032] In the figure: 1. Spindle equipment box; 2. Mandrel; 3. Synchronous pulley; 4. Belt cover;

[0033] 501, vertical plate; 502, tension wheel; 503, alarm; 504, vertical slot; 505, hollow column; 506, support column; 507, lifting block; 508, button; 509, connecting shaft; 510, spring;

[0034] 6. Chuck; 7. Bushing; 8. Thrust ring; 9. First gas sealing ring; 10. Linked piston; 11. Retaining ring; 12. Second gas sealing ring; 13. Cover plate; 14. Oil floating gap; 15. First oil unloading port; 16. Second oil unloading port; 17. Collet; 18. Threaded groove; 19. Feed oil chamber; 20. Feed oil chamber; 21. First gas sealing groove; 22. Second gas sealing groove; 23. Third gas sealing groove; 24. Piston feed oil passage; 25. Piston feed oil passage; 26. First row of oil grooves; 27. Second row of oil grooves; 28. Third row of oil grooves; 29. ​​First axial oil chamber surface; 30. First radial oil chamber surface; 31. Second radial oil chamber surface; 32. Second axial oil chamber surface. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] A fully static pressure ultra-precision double-headed spindle of this embodiment, such as Figure 1 - Figure 8 As shown, it includes a core shaft 2, a shaft sleeve 7 is fixedly connected to the outer surface of the core shaft 2, a spindle device body 1 is rotatably connected to the outer surface of the shaft sleeve 7, a synchronous pulley 3 is fixedly connected to one side of the outer surface of the shaft sleeve 7, a transmission assembly is transmission-connected to the synchronous pulley 3, a belt cover 4 is provided on the outer cover of the synchronous pulley 3, the belt cover 4 is fixedly connected to the spindle device body 1, a transmission assembly loosening abnormal warning mechanism is arranged inside the belt cover 4, and the transmission assembly loosening abnormal warning mechanism is used to monitor whether the transmission assembly connected to the outer surface of the synchronous pulley 3 is loose during operation.

[0037] In this embodiment, Figure 3 As shown, the transmission component loosening abnormal warning mechanism includes a vertical plate 501, the vertical plate 501 is fixedly connected to the belt cover 4, and vertical grooves 504 are symmetrically opened on the side of the vertical plate 501 away from the spindle equipment body 1, and lifting blocks 507 are slidably connected in the vertical grooves 504. The lifting blocks 507 are rotatably connected to the connecting shaft 509 on the side away from the vertical plate 501, and the connecting shaft 509 is fixedly connected to the tensioning wheel 502. When the lifting block 507 slides in the vertical groove 504, the tensioning wheel 502 can be driven to move synchronously through the connecting shaft 509 connected to the side wall, so that the tensioning wheel 502 is always in contact with the inner wall of the transmission component to maintain the tensioning force of the transmission component.

[0038] In this embodiment, Figure 3 and Figure 4 As shown, the lifting block 507 is fixedly connected to the opposite side with a support column 506, and the outer surface of the support column 506 is sleeved with a hollow column 505, and the support column 506 is slidably connected to the hollow column 505, and the hollow column 505 is fixedly connected in the vertical groove 504. A spring 510 is fixedly connected between the support column 506 and the hollow column 505. When the pressure of the lifting block 507 disappears, the rebound force of the spring 510 can push the support column 506 to slide out from the inside of the hollow column 505, thereby driving the lifting block 507 to rise and fall.

[0039] In this embodiment, Figure 3As shown, buttons 508 are provided on the side of the lifting block 507 away from the support column 506. The buttons 508 are fixedly connected in the vertical groove 504. Alarms 503 are electrically connected between the buttons 508. The alarms 503 are fixedly connected to the side walls of the vertical plates 501. When the lifting block 507 slides in the vertical groove 504 to press the buttons 508, the alarms 503 will be turned on to work.

[0040] In the prior art, if the staff cannot timely understand the abnormal situation of the belt or chain, the loose belt or chain is not only easy to rub or collide with the surrounding parts when running at high speed, causing damage to these parts, but as the looseness increases, the belt will suddenly fall off or break, posing a serious threat to the double-headed spindle and personnel. In addition, the loose belt or chain will increase the energy loss in the transmission process, reduce the transmission efficiency, and generate vibration and noise, making the double-headed spindle unstable during operation, affecting the accuracy and quality of product grinding. Compared with the prior art, when the transmission component is loose, the alarm 503 can be automatically triggered to remind the staff, which can not only reduce the situation of the spindle 2 malfunctioning due to the sudden situation of the transmission component falling off and breaking, thereby reducing the maintenance cost of the spindle 2 and extending the service life of the spindle 2, but also avoid the situation of the spindle 2 working under the abnormal condition of the transmission component and generating vibration and noise, ensuring the stability of the spindle 2 during operation, thereby improving the grinding accuracy and quality of the spindle 2 on the product;

[0041] Secondly, by setting the spring 510, when the transmission component becomes loose, the tensioning wheel 502 can be pushed to move relative to it, thereby maintaining the tension of the transmission component. This not only ensures that the transmission component always maintains appropriate tension and reduces the instability of the rotational transmission caused by the loosening of the core shaft 2, but also maintains appropriate tension of the transmission component. It can reduce the relative sliding between the transmission component and the synchronous pulley 3, thereby reducing the wear rate and extending the service life of the transmission component and the synchronous pulley 3.

[0042] At other levels, such as Figure 5 - Figure 8 As shown, the outer ring of the core shaft 2 is fixedly connected to a thrust ring 8, chucks 6 are provided on both sides of the core shaft 2, a collet 17 is fixedly connected between the chucks 6, the inner wall of the core shaft 2 is symmetrically provided with threaded grooves 18, one end of the collet 17 is fixedly connected to a linkage piston 10, and a 30 degree angle is set between the linkage piston 10 and both ends of the core shaft 2.

[0043] In this embodiment, Figure 5 and Figure 7As shown, the first air-sealing ring 9 and the second air-sealing ring 12 are respectively arranged on both sides of the sleeve 7, and the first air-sealing ring 9 and the second air-sealing ring 12 are both fixedly connected to the spindle equipment body 1, and the synchronous pulley 3 is fixedly connected to the side of the spindle equipment body 1 away from the spindle equipment body 1 with a retaining ring 11, and the retaining ring 11 is fixedly connected to the belt cover 4, and the belt cover 4 is fixedly connected with a cover plate 13. The sleeve 7 is provided with a first air-sealing groove 21, a second air-sealing groove 22 and a third air-sealing groove 23, and adopts a multi-way air-sealing form. The compressed air is blown toward the inside and outside of the core shaft 2 at the same time. When blowing inward, the return oil in the oil tank is pressurized to speed up the oil return speed, replacing the oil pump, reducing costs and stabilizing performance. When blowing outward, dust, iron filings and other pollutants are prevented from entering the interior through the gap to pollute and damage the core shaft 2.

[0044] In this embodiment, Figure 8 As shown, a first axial oil cavity surface 29, a first radial oil cavity surface 30, a second radial oil cavity surface 31 and a second axial oil cavity surface 32 are provided in the sleeve 7. The first axial oil cavity surface 29 and the second axial oil cavity surface 32 are located on both sides, and the first radial oil cavity surface 30 and the second radial oil cavity surface 31 are located between the first axial oil cavity surface 29 and the second axial oil cavity surface 32. An oil floating gap 14 is provided in the sleeve 7. When the hydraulic station draws oil into the sleeve 7, the oil reaches each oil cavity surface through the internal oil pipeline, flows out through the gap, and forms a high-rigidity oil film. The oil film wraps the entire core shaft 2 and floats it, so that when the core shaft 2 rotates, no friction resistance is generated with other parts, so that the core shaft 2 can always maintain high-precision rotation, ensuring the machining accuracy of the workpiece, so that the accuracy reaches the sub-micron level, and the oil film has a strong shock absorption ability, which can absorb the vibration during the machining process, ensure the high finish requirement of the workpiece, omit the subsequent workpiece surface grinding step, save the machining cost, and improve the machining efficiency.

[0045] In this embodiment, Figure 5 , Figure 7 and Figure 8 As shown, the shaft sleeve 7 is respectively provided with a first oil unloading port 15 and a second oil unloading port 16, and the shaft sleeve 7 is provided with a first row of oil grooves 26, a second row of oil grooves 27 and a third row of oil grooves 28, which are all connected to the first oil unloading port 15 and the second oil unloading port 16.

[0046] In this embodiment, Figure 5 and Figure 7 As shown, the linkage piston 10 is provided with a piston feed oil circuit 24 and a piston feed oil circuit 25, and the two sides of the linkage piston 10 are provided with a feed oil chamber 19 and a feed oil chamber 20, respectively. The feed oil chamber 19 and the feed oil chamber 20 are both opened on the shaft sleeve 7.

[0047] In the prior art, the double-headed spindles on the market can only be used for turning of shaft parts. Due to precision issues, they cannot be used on high-end grinders. When used as a double-sided grinder spindle, the spindle is clamped and released during operation, and the repeat positioning accuracy is poor. Each re-clamping requires re-adjustment. Compared with the prior art, the full hydraulic control linkage piston 10 has a greater thrust than the reset spring 510, and will not have functional failures. It can be used for both turning and grinding. It can be installed on a lathe as a double-headed turning spindle, and can also be installed on a grinder as a double-headed grinder, which expands the scope of application of the core shaft 2.

[0048] The working process and principle involved in the overall content of the above embodiment are as follows:

[0049] When the mandrel 2 is needed to work, the workpiece is first passed through the threaded groove 18 opened inside the mandrel 2 and rotated and fixed at both ends of the mandrel 2. Then, the piston oil reaches the feed oil chamber 20 through the oil filling port of the piston feed oil circuit 24, pushing the linkage piston 10 forward. While the linkage piston 10 moves forward, the chuck 6 is clamped by the angle. When the front chuck 6 shrinks to the limit, it will maintain elastic deformation and continue to move forward, thereby driving the collet chuck 17 forward, and then driving the rear end chuck 6 forward. At the same time, the rear end chuck 6 is compressed and elastically deformed by the angle of the mandrel 2, and then the workpiece is clamped, thereby achieving the effect of fixing the workpiece. Similarly, after the hydraulic oil is injected into the oil filling port of the piston feed oil circuit 25, it enters the feed oil chamber 19 at the front end of the linkage piston 10, pushing the linkage piston 10 backward, restoring the elastic deformation of the front and rear chucks 6, and achieving the effect of loosening the workpiece.

[0050] The first axial oil cavity surface 29, the first radial oil cavity surface 30, the second radial oil cavity surface 31 and the second axial oil cavity surface 32 in the sleeve 7 need to be used together with a supporting hydraulic station and an oil cooler. When the hydraulic station pumps oil into the core shaft 2, the oil reaches each oil cavity surface through the internal oil pipeline, flows out through the gap, and forms a high-rigidity oil film. The oil film wraps the core shaft 2 completely, so that the friction generated between the core shaft 2 and other parts is isolated when the core shaft 2 rotates, and the oil film can make up for the insufficient precision of the parts processing, so that the precision reaches ultra-precision. The oil generated during the operation will pass through the three oil unloading grooves of the first row of oil grooves 26, the second row of oil grooves 27 and the third row of oil grooves 28 and the large oil return grooves vacant at the front and rear ends of the sleeve 7, and are collected together to the first oil unloading port 15, or the second oil unloading port 16 to be discharged to the hydraulic station to form a cycle. During operation, the oil film will absorb the vibration and heat generated by the processing of the core shaft 2, so that the core shaft 2 always maintains stable, high-precision and high-rigidity operation;

[0051] When the driving transmission assembly drives the synchronous belt pulley 3 to rotate, the transmission assembly is first sleeved on the outer surface of the synchronous belt pulley 3. At this time, the tensioning wheel 502 symmetrically arranged on one side of the synchronous belt pulley 3 will be located inside the transmission assembly and fit the upper and lower surfaces inside the transmission assembly. As time goes by, after the transmission assembly becomes loose, the spring 510 connected to the inside of the hollow column 505 will push the support column 506 to slide out from the inside of the hollow column 505 (it should be noted that the spring 510 is initially in a compressed state when located inside the transmission assembly), driving the lifting blocks 507 to slide against each other in the vertical groove 504. During the movement of the lifting block 507, the lifting block 507 can drive the tensioning wheel 502 to move away from each other synchronously inside the transmission component through the connecting shaft 509 connected to the side wall, pull the transmission component, and maintain the tension of the transmission component, which can not only ensure that the transmission component always maintains appropriate tension and reduce the unstable rotation transmission caused by the looseness of the core shaft 2, but also maintain the appropriate tension of the transmission component. It can reduce the relative sliding between the transmission component and the synchronous pulley 3, thereby reducing the wear rate and extending the service life of the transmission component and the synchronous pulley 3;

[0052] When the relaxation force of the transmission component is too large, the lifting block 507 will slide to the edge in the vertical slot 504 and press the button 508 connected to the inside of the vertical slot 504. At this time, the button 508 and the alarm 503 are electrically connected, which will drive the alarm 503 connected to the side wall of the vertical plate 501 to work, reminding the staff. This can not only reduce the failure of the spindle 2 caused by the sudden situation of the transmission component falling off and breaking, thereby reducing the maintenance cost of the spindle 2 and extending the service life of the spindle 2, but also avoid the vibration and noise caused by the spindle 2 working under abnormal conditions of the transmission component, thereby ensuring the stability of the spindle 2 during operation, thereby improving the grinding accuracy and quality of the spindle 2 on the product.

[0053] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A fully hydrostatic ultra-precision double-ended spindle, comprising a mandrel (2), characterized in that: The outer surface of the core shaft (2) is fixedly connected to a shaft sleeve (7), the outer surface of the shaft sleeve (7) is rotatably connected to a spindle device body (1), one side of the outer surface of the shaft sleeve (7) is fixedly connected to a synchronous pulley (3), the synchronous pulley (3) is transmission-connected to a transmission assembly, the outer cover of the synchronous pulley (3) is provided with a belt cover (4), and the belt cover (4) is fixedly connected to the spindle device body (1); A transmission component loosening abnormal warning mechanism is arranged inside the belt cover (4), and the transmission component loosening abnormal warning mechanism is used to monitor whether the transmission component connected to the outer surface of the synchronous pulley (3) is loose during operation.

2. A fully hydrostatic ultra-precision double-ended spindle according to claim 1, characterized in that: The transmission component loosening abnormal warning mechanism comprises a vertical plate (501), wherein the vertical plate (501) is fixedly connected to the belt cover (4), and vertical grooves (504) are symmetrically opened on the side of the vertical plate (501) away from the spindle device body (1), and lifting blocks (507) are slidably connected in the vertical grooves (504), and the lifting blocks (507) are rotatably connected to the connecting shaft (509) on the side away from the vertical plate (501), and the connecting shaft (509) is fixedly connected to the tensioning wheel (502).

3. A fully static pressure ultra-precision double-headed spindle according to claim 2, characterized in that: The lifting block (507) is fixedly connected to a support column (506) on one side thereof; a hollow column (505) is sleeved on the outer surface of the support column (506); the support column (506) is slidably connected to the hollow column (505); the hollow column (505) is fixedly connected to the vertical groove (504); and a spring (510) is fixedly connected between the support column (506) and the hollow column (505).

4. A fully hydrostatic ultra-precision double-ended spindle according to claim 3, characterized in that: The lifting block (507) is provided with a button (508) on one side away from the support column (506), and the buttons (508) are fixedly connected in the vertical groove (504). The buttons (508) are electrically connected with an alarm (503), and the alarm (503) is fixedly connected to the side wall of the vertical plate (501).

5. The fully hydrostatic ultra-precision double-ended spindle according to claim 1, characterized in that: The outer ring of the core shaft (2) is fixedly connected with a thrust ring (8), chucks (6) are arranged on both sides of the core shaft (2), a collet (17) is fixedly connected between the chucks (6), the inner wall of the core shaft (2) is symmetrically provided with thread grooves (18), one end of the collet (17) is fixedly connected with a linkage piston (10), and an angle of 30 degrees is set between the linkage piston (10) and the two ends of the core shaft (2).

6. A fully hydrostatic ultra-precision double-ended spindle according to claim 5, characterized in that: A first air-sealing ring (9) and a second air-sealing ring (12) are respectively arranged on both sides of the shaft sleeve (7); the first air-sealing ring (9) and the second air-sealing ring (12) are both fixedly connected to the spindle device body (1); a retaining ring (11) is fixedly connected to the side of the synchronous pulley (3) away from the spindle device body (1); the retaining ring (11) is fixedly connected to the belt cover (4); a cover plate (13) is fixedly connected to the belt cover (4); and a first air-sealing groove (21), a second air-sealing groove (22) and a third air-sealing groove (23) are provided on the shaft sleeve (7).

7. A fully hydrostatic ultra-precision double-ended spindle according to claim 6, characterized in that: The shaft sleeve (7) is provided with a first axial oil cavity surface (29), a first radial oil cavity surface (30), a second radial oil cavity surface (31) and a second axial oil cavity surface (32); the first axial oil cavity surface (29) and the second axial oil cavity surface (32) are located on both sides; the first radial oil cavity surface (30) and the second radial oil cavity surface (31) are located between the first axial oil cavity surface (29) and the second axial oil cavity surface (32); and an oil floating gap (14) is provided in the shaft sleeve (7).

8. A fully hydrostatic ultra-precision double-ended spindle according to claim 7, characterized in that: The shaft sleeve (7) is provided with a first oil unloading port (15) and a second oil unloading port (16), respectively; the shaft sleeve (7) is provided with a first row of oil grooves (26), a second row of oil grooves (27) and a third row of oil grooves (28); the first row of oil grooves (26), the second row of oil grooves (27) and the third row of oil grooves (28) are all connected to the first oil unloading port (15) and the second oil unloading port (16).

9. A fully hydrostatic ultra-precision double-ended spindle according to claim 8, characterized in that: The linkage piston (10) is provided with a piston feed oil path (24) and a piston feed oil path (25), and the two sides of the linkage piston (10) are provided with a feed oil chamber (19) and a feed oil chamber (20), respectively. The feed oil chamber (19) and the feed oil chamber (20) are both provided on the shaft sleeve (7).

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