Numerically controlled rotary table device of six-axis structure

Abstract

The application discloses a six-axis structure numerical control rotary table device, which comprises an outer shell arranged on a six-axis base, a motor and a central shaft arranged in the outer shell in sequence, a flexible ring box arranged in a ring shape near a sealing unit position of a liquid cavity, liquid collecting and discharging ports arranged on inner and outer ring walls of the flexible ring box respectively, and an auxiliary sealing ring block arranged in a ring shape on the inner ring wall of the flexible ring box and extending to cover a gap between the central shaft and a brake pressing ring; a top ring block connected with the auxiliary sealing ring block is arranged on an inner side wall of the flexible ring box through the liquid collecting port, and a water absorbing expansion plate fixedly connected with another inner side wall of the flexible ring box is arranged on a side of the top ring block. When the sealing unit leaks, the movement of the top ring block drives a sealing block ring on the auxiliary sealing ring block to tightly adhere to an auxiliary sealing ring groove through a connecting rod, so that active waterproof sealing of the gap between the central shaft and the brake pressing ring is realized when liquid leaks.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of numerical control machine tool rotary tables, and particularly relates to a numerical control rotary table with a six-axis structure. BACKGROUND

[0002] The numerical control machine tool rotary table with a six-axis structure is mainly used for part machining, and the six-axis structure drives the cutting tool to move towards the part on the rotary table for machining. The rotary table drives the part to rotate to an angle suitable for cutting. The rotary table is mainly composed of a bearing, a speed reduction worm gear pair, and a positioning locking mechanism for an end tooth indexing rotary table. The rotary table as a whole is composed of a rotatable central shaft and a fixedly installed housing. During the relative movement of the part and the cutting tool, a large amount of friction heat is generated. Therefore, cooling liquid (cutting fluid) is poured towards the part on the rotary table to achieve the purpose of cooling and facilitate lubrication. The connection between the central shaft and the housing is usually at risk of infiltration of liquids such as cutting fluid. The current numerical control machine tool rotary table has a sealing unit to prevent liquid infiltration. However, the sealing element is inevitably subject to failure. The numerical control machine tool rotary table often has problems such as leakage of cooling liquid or infiltration of external cutting fluid into the rotary table, which causes lubrication failure of the bearings in the rotary table, damage to the motor due to water immersion, internal rusting, and other problems.

[0003] For example, a numerical control machine tool rotary table is disclosed in Chinese Patent No. CN113043031B. The numerical control machine tool rotary table includes a housing, a motor, a central shaft disposed in the housing and drivingly coupled to the motor, whereby the motor can drive the central shaft to rotate, and a sealing unit disposed in the connection between the central shaft and the housing and providing a fluid seal between the central shaft and the housing. The numerical control machine tool rotary table further includes an isolation protection unit, which includes an isolation groove disposed on the central shaft and a liquid following cavity disposed on the housing. The housing further includes a main leakage passage and a front end leakage passage, and the front end leakage passage fluidly connects the isolation protection unit and the main leakage passage. The addition of the isolation groove on the central shaft prevents liquid from entering the interior of the rotary table. The liquid following cavity and the leakage passage ensure that the leaked cutting fluid and motor cooling liquid can be guided out of the housing of the numerical control machine tool rotary table, and the operator can be notified in a timely manner in the event of leakage, thereby reducing the risk of rotary table sealing failure.

[0004] However, the above-mentioned scheme has the following disadvantages: Although the above-mentioned prior art patent document achieves the guiding of the leaked liquid out of the rotary table housing through the setting of the isolation groove, the liquid following cavity, and the leakage passage, it only has the function of guiding the leaked liquid when the sealing unit leaks, and cannot actively seal the leakage point. How to guide the leaked liquid out while actively sealing the leakage point between the sealing unit, the central shaft, and the housing is a problem that needs to be solved at present.

[0005] To this end, we propose a six-axis structure of CNC rotary table equipment to solve the problems mentioned in the background art. SUMMARY

[0006] The purpose of the present application is to provide a six-axis structure of CNC rotary table equipment to solve the problems in the background art.

[0007] To achieve the above object, the present application provides the following technical solutions:

[0008] A six-axis structure of CNC rotary table equipment, comprising a housing provided on a six-axis base, and a motor and a center shaft provided in the housing in sequence, the motor driving end and the center shaft are coupled, the housing is provided with a brake pressure ring sleeved on the outer edge of the center shaft, a sealing unit is provided at the connection between the housing, the center shaft and the brake pressure ring, the gap between the housing and the brake pressure ring constitutes a liquid following cavity, and the lower part of the housing is provided with a leakage passage and is connected with the liquid following cavity, the leakage liquid seeping into the sealing unit is discharged in sequence through the liquid following cavity and the leakage passage, and the flexible ring box is annularly provided near the sealing unit, and the liquid collecting port and the liquid discharge port are respectively provided on the inner and outer side walls of the flexible ring box, the liquid discharge port is connected with the liquid following cavity and the leakage passage, and the inner wall of the flexible ring box is annularly provided with an auxiliary sealing ring block extending over the gap between the center shaft and the brake pressure ring;

[0009] The inner side wall of the flexible ring box is provided with a top ring block connected with the auxiliary sealing ring block through the liquid collecting port, and the side part of the top ring block is fixedly connected with a water absorption expansion plate on the other inner side wall of the flexible ring box, the leakage liquid caused by the failure of the sealing unit enters the inside of the flexible ring box through the liquid collecting port, the water absorption expansion plate expands horizontally by absorbing water and makes the flexible ring box assist in sealing the liquid inlet end of the liquid following cavity through the top ring block, and the top ring block drives the auxiliary sealing ring block to assist in actively sealing the gap between the center shaft and the brake pressure ring;

[0010] The leakage liquid flowing into the flexible ring box is discharged in sequence through the liquid discharge port, the liquid following cavity and the leakage passage.

[0011] Preferably, the housing comprises a front end cover provided outside the sealing unit, the gap between the brake pressure ring and the front end cover constitutes the liquid following cavity, the sealing unit comprises a ring groove and a sealing element arranged at the connection between the center shaft, the brake pressure ring and the front end cover, the sealing element is arranged in the ring groove, and the ring groove and the liquid following cavity are connected.

[0012] Preferably, one side wall of the flexible ring box is embedded in the inner side wall of the front end cover, the other side wall is in sealing contact with the brake pressure ring, the top of the auxiliary sealing ring block extends to the inside of the ring groove, and the ring groove is provided with an auxiliary sealing ring groove on the side wall of the center shaft and the side wall of the liquid cavity relative to the side wall of the brake pressure ring, the connecting gap between the center shaft and the brake pressure ring is located between the adjacent auxiliary sealing ring grooves, and the upper and lower parts of the side wall of the auxiliary sealing ring block are provided with sealing plugs for preventing leakage of the auxiliary sealing ring grooves on the side wall of the center shaft and the side wall of the liquid cavity.

[0013] Preferably, the top of the top ring block is provided with a liquid guide inclined block located below the liquid collecting port, the liquid guide inclined block is used for guiding the leakage liquid flowing into the liquid collecting port to the side of the water absorption expansion plate, and the upper end of the liquid guide inclined block is provided with a connecting rod penetrating the liquid collecting port, and the top of the connecting rod is connected with the auxiliary sealing ring block.

[0014] Preferably, the water guide block is provided on the water absorption expansion plate and connected with the inner side wall of the flexible ring box, the water guide block is provided with a liquid outlet hole, the leakage liquid introduced by the liquid guide inclined block is immersed in the expansion part of the water absorption expansion plate, and the water guide block provides unilateral expansion direction support for the water absorption expansion plate, so that when the water absorption expansion plate absorbs water and expands, the sealing plugs on the upper and lower parts of the auxiliary sealing ring block and the auxiliary sealing ring grooves are tightly and leak-proofly arranged by the connecting rod above the top ring block, and the leakage liquid immersed in the water absorption expansion plate is discharged from the liquid discharge port through the liquid outlet hole.

[0015] According to the six-axis structure numerical control rotary table device, the front end cover is provided with a strip-shaped groove on the side wall relative to the liquid cavity, the bottom end face of the flexible ring box is provided with a sealing strip for preventing leakage of the strip-shaped groove, the liquid outlet end of the liquid discharge port extends to the inside of the strip-shaped groove, the insertion end of the sealing strip is vertically provided with a flow guide rib, and the inside bottom end face of the strip-shaped groove is communicated and penetrated by a liquid discharge pipe connected with the leakage passage liquid inlet end.

[0016] Preferably, the strip-shaped groove is arranged with a main magnetic block, and the insertion end of the sealing strip is arranged with a secondary magnetic block magnetically attracted to the main magnetic block.

[0017] Compared with the prior art, the beneficial effects of the present application are:

[0018] 1、When the sealing unit leaks, the liquid guide inclined block below the liquid collecting port and the water guide block on the right side will concentrate the leaked liquid in the water absorption expansion plate area. After the water absorption expansion plate absorbs water, it will expand horizontally and drive the top ring block to move towards the inner side of the flexible ring box, thereby tightly waterproofing the inner side of the flexible ring box and the sidewall of the brake compression ring. At the same time, the movement of the top ring block will also drive the sealing plug ring on the auxiliary sealing ring block to tightly fit in the auxiliary sealing ring groove through the connecting rod, actively waterproofing and sealing the gap between the center shaft and the brake compression ring when leaking.

[0019] 2、The leaked liquid flowing into the strip-shaped groove will finally be discharged from the shell through the leakage passage, and the design of the strip-shaped groove can avoid the leaked liquid being discharged through the sidewall of the brake compression ring, ensuring the dryness of the brake compression ring area when draining the leaked water, and providing a good dry environment for the brake compression ring. When the auxiliary sealing ring block fails, the leaked liquid will be discharged into the leakage passage through the liquid cavity path. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a partial structure diagram of the six-axis base station area of the present application;

[0021] Figure 2 is a partial enlarged schematic view of the auxiliary sealing ring block of the present application; Figure 1

[0022] Figure 3 is a partial enlarged schematic view of the flexible ring box area of the present application; Figure 2

[0023] Figure 4 is a partial enlarged schematic view of the flexible ring box area of the present application; Figure 3

[0024] Figure 5 is a half-section structure schematic view of the flexible ring box of the present application;

[0025] Figure 6 is a partial enlarged schematic view of the lower sealing strip area of the present application; Figure 5

[0026] Figure 7 is a half-section structure schematic view of the water absorption expansion plate and water guide block of the present application; Figure 6

[0027] Figure 8 is a partial structure schematic view of the inner and outer side of the flexible ring box of the present application.

[0028] ​​​​​In the figure: 201, six-axis base; 1, shell; 2, motor; 3, central shaft; 4, brake pressure ring; 5, flexible ring box; 6, liquid collecting port; 7, liquid discharging port; 8, auxiliary sealing ring block; 9, top ring block; 10, water absorption expansion plate; 11, front end cover; 12, ring groove; 13, sealing element; 14, auxiliary sealing ring groove; 15, sealing plug ring; 16, liquid guide inclined block; 17, connecting rod; 18, water guide block; 19, liquid outlet hole; 20, strip-shaped groove; 21, sealing strip; 22, flow guide rib; 23, liquid discharge pipe; 24, main magnetic block; 25, auxiliary magnetic block; 101, liquid following cavity; 102, leakage passage. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

[0030] Please refer to Figures 1-8 , the present application provides a technical solution:

[0031] Embodiment one:

[0032] A numerical control rotary table device with six-axis structure, comprising a shell 1 arranged on a six-axis base 201, a mechanical arm with six-axis structure integrated on the six-axis base 201, a cutting tool mounted on the mechanical arm and used for machining parts on the rotary table, not described in detail, and a motor 2 and a central shaft 3 arranged in the shell 1 in sequence, the motor 2 driving end and the central shaft 3 are connected, the shell 1 is internally provided with a brake pressure ring 4 sleeved on the outer edge of the central shaft 3, a sealing unit is arranged at the connection between the shell 1, the central shaft 3 and the brake pressure ring 4, the gap between the shell 1 and the brake pressure ring 4 constitutes a liquid following cavity 101, the cross-sectional width of the liquid following cavity 101 is 0.7mm, and the lower part of the shell 1 is provided with a leakage passage 102 and is in communication with the liquid following cavity 101, the leakage liquid seeping in when the sealing unit leaks is discharged in sequence through the liquid following cavity 101 and the leakage passage 102, and the liquid following cavity 101 is annularly arranged with a flexible ring box 5 near the position of the sealing unit, the flexible ring box 5 is a hollow ring structure, the flexible ring box 5 is composed of an outer side and an inner side, as Figure 8 shown, the left side is the inner side and the right side is the outer side, the outer side is composed of elastic rubber, the inner side is made of hard nylon material, the inner and outer side walls of the flexible ring box 5 are respectively provided with a liquid collecting port 6 and a liquid discharging port 7, the liquid discharging port 7 is in communication with the liquid following cavity 101 and the leakage passage 102, and the inner wall of the flexible ring box 5 is annularly provided with an auxiliary sealing ring block 8 extending and covering the gap between the central shaft 3 and the brake pressure ring 4, the auxiliary sealing ring block 8 is an L-shaped structure in cross section, the L-shaped structure design can make larger area contact with the connection between the central shaft 3 and the brake pressure ring 4, at the same time, the auxiliary sealing ring block 8 can adaptively adjust the shape according to the above connection, improve the contact area, and thus improve the sealing performance;

[0033] The top ring block 9 is connected with the auxiliary sealing ring block 8 through the liquid collecting port 6 on the inner side wall of the flexible ring box 5, the top ring block 9 is composed of a hollow ring structure, the top ring block 9 is made of elastic steel, and the top ring block 9 will be elastically deformed when subjected to external pressure, the outer arc surface of the top ring block 9 is in elastic contact with the flexible ring box 5 on the inner side, the side of the top ring block 9 is provided with a water absorption expansion plate 10 fixedly connected with the other inner side wall of the flexible ring box 5, the water absorption expansion plate 10 is made of water absorption expansion rubber strip, when the sealing unit fails, the leaked liquid enters the inside of the flexible ring box 5 through the liquid collecting port 6, the water absorption expansion plate 10 absorbs water and expands horizontally, and the flexible ring box 5 is assisted to seal the liquid inlet end of the liquid passage 101 through the top ring block 9, and at the same time, the top ring block 9 drives the auxiliary sealing ring block 8 to actively seal the gap between the center shaft 3 and the brake pressure ring 4.

[0034] The leaked liquid in the flexible ring box 5 is sequentially discharged through the liquid discharging port 7, the liquid passage 101 and the leakage passage 102.

[0035] In another embodiment, the outer side and the inner side of the flexible ring box 5 are both made of elastic rubber, but the hardness of the rubber on the outer side is higher than that on the inner side, so the outer side of the flexible ring box 5 has better plasticity, and the inner side of the flexible ring box 5 is easily deformed by the extrusion of the top ring block 9.

[0036] Embodiment two:

[0037] Based on the embodiment one, it is further explained that the shell 1 includes a front end cover 11 arranged outside the sealing unit, the front end cover 11 waterproofly seals and covers the outside of the brake pressure ring 4, the gap between the brake pressure ring 4 and the front end cover 11 constitutes the liquid passage 101, the sealing unit includes a ring groove 12 and a sealing element 13 arranged at the connecting position between the center shaft 3, the brake pressure ring 4 and the front end cover 11, the sealing element 13 is a component matched with the existing rotary table, which is not described in detail, the sealing element 13 is arranged inside the ring groove 12, and the ring groove 12 is in communication with the liquid passage 101.

[0038] Embodiment three:

[0039] Based on the embodiment one, it is further explained that the outer side wall of the flexible ring box 5 is embedded in the inner side wall of the front end cover 11, the inner side wall is in sealing contact with the brake pressure ring 4, the top of the auxiliary sealing ring block 8 extends to the inside of the ring groove 12, and the ring groove 12 is provided with an auxiliary sealing ring groove 14 on the side wall relative to the center shaft 3 and on the side wall of the liquid passage 101 relative to the brake pressure ring 4, the connecting gap between the center shaft 3 and the brake pressure ring 4 is located between the adjacent auxiliary sealing ring grooves 14, and the side wall of the auxiliary sealing ring block 8 is provided with a sealing plug ring 15 on the upper and lower parts, the sealing plug ring 15 is composed of a tapered sealing rubber, and the sealing plug ring 15 is used for preventing leakage and plugging the auxiliary sealing ring grooves 14 on the side wall of the center shaft 3 and the liquid passage 101.

[0040] Embodiment four:

[0041] Further illustrated on the basis of embodiment one, the top ring block 9 is provided with a liquid guide inclined block 16 below the liquid collecting port 6, which is used to guide the leakage liquid flowing into the liquid collecting port 6 to the side of the water absorption expansion plate 10. The upper end of the liquid guide inclined block 16 is provided with a connecting rod 17 penetrating the liquid collecting port 6, and the top of the connecting rod 17 is connected with the auxiliary sealing ring block 8. The connecting rod 17 can make the auxiliary sealing ring block 8 fit and seal the gap between the center shaft 3 and the brake pressure ring 4 when the top ring block 9 moves.

[0042] Embodiment five:

[0043] Further illustrated on the basis of embodiment one, the water absorption expansion plate 10 is provided with a water guide block 18 at the connection between the inner side wall of the flexible ring box 5, and the water guide block 18 is provided with a liquid outlet hole 19. The water guide block 18, the water absorption expansion plate 10 and the front and rear end faces of the top ring block 9 extend to the inner wall of the flexible ring box 5, so that the leakage liquid guided by the water guide block 18 of the flexible ring box and guided by the liquid guide inclined block 16 is immersed in the expansion part of the water absorption expansion plate 10. At the same time, the water guide block 18 provides unilateral expansion direction support for the water absorption expansion plate 10. When the water absorption expansion plate 10 absorbs water and expands, the connecting rod 17 above the top ring block 9 pushes the sealing plug ring 15 and the auxiliary sealing ring groove 14 on the upper and lower parts of the auxiliary sealing ring block 8 to be closely and leak-proofly fitted, and the leakage liquid immersed in the water absorption expansion plate 10 is discharged from the liquid discharge port 7 through the liquid outlet hole 19.

[0044] Embodiment six:

[0045] Further illustrated on the basis of embodiment one, the front end cover 11 is provided with a strip-shaped groove 20 on the side wall of the liquid following cavity 101, and the flexible ring box 5 is provided with a sealing strip 21 at the bottom end face. The cross section of the sealing strip 21 is T-shaped structure. The sealing strip 21 is used for preventing leakage and sealing the port of the strip-shaped groove 20. At the same time, the sealing strip 21 has a channel for accommodating leakage liquid flow between the insertion end and the inside of the strip-shaped groove 20. The liquid outlet end of the liquid discharge port 7 extends to the inside of the strip-shaped groove 20, and the insertion end of the sealing strip 21 is vertically provided with a flow guide rib 22. The outer surface of the flow guide rib 22 is coated with a hydrophobic coating. The hydrophobic coating can be a 1mm thick Teflon coating. The inside of the strip-shaped groove 20 is connected and penetrated by a liquid discharge pipe 23, which is connected and communicated with the liquid inlet end of the leakage passage 102. The leakage liquid discharged from the liquid discharge port 7 is guided by the hydrophobic coating on the flow guide rib 22, which plays a role of quickly guiding water and effectively prevents the accumulation of leakage water in the flexible ring box 5.

[0046] The main magnetic block 24 is arranged inside the strip-shaped groove 20, the auxiliary magnetic block 25 is arranged at the insertion end of the sealing strip 21 and is magnetically attracted to the main magnetic block 24, the main magnetic block 24 and the auxiliary magnetic block 25 are both made of magnets, the sealing effect of the sealing strip 21 on the strip-shaped groove 20 is improved, and the design of the strip-shaped groove 20 avoids the leakage liquid passing through the side surface of the brake pressure ring 4, so that the brake pressure ring 4 can be kept dry and the probability of rusting of the brake pressure ring 4 is reduced.

[0047] The working principle is as follows: when the sealing unit leaks, the cutting fluid enters the ring groove 12 inside through the gap, the liquid inlet end of the liquid cavity 101 is preliminarily waterproofed under the action of the flexible ring box 5, and the sealing plug ring 15 on the auxiliary sealing ring block 8 is preliminarily sealed by being inserted into the corresponding auxiliary sealing ring groove 14, the leakage liquid permeating into the ring groove 12 enters the inside of the flexible ring box 5 through the liquid collecting port 6, the liquid guide inclined block 16 below the liquid collecting port 6 and the water guide block 18 on the right side concentrate the leakage liquid in the area of the water absorption expansion plate 10, the water absorption expansion plate 10 expands transversely after absorbing water, and drives the top ring block 9 to move towards the inside of the flexible ring box 5, so as to tightly waterproof the inside of the flexible ring box 5 and the side wall of the brake pressure ring 4, and the movement of the top ring block 9 also drives the sealing plug ring 15 on the auxiliary sealing ring block 8 to tightly fit in the auxiliary sealing ring groove 14, so as to actively waterproof the gap between the central shaft 3 and the brake pressure ring 4 when the leakage liquid;

[0048] The leakage liquid finally flows into the strip-shaped groove 20 through the liquid outlet hole 19 and the liquid discharge port 7, the sealing strip 21 waterproofs the port part of the strip-shaped groove 20, and the cooperation of the main magnetic block 24 and the auxiliary magnetic block 25 ensures the tight installation of the sealing strip 21, the leakage liquid flowing into the strip-shaped groove 20 is finally discharged from the shell 1 through the leakage passage 102, and the design of the strip-shaped groove 20 can avoid the leakage liquid passing through the side wall of the brake pressure ring 4 to be discharged, so as to ensure the dryness of the area of the brake pressure ring 4 when the leakage water is discharged, and provide a good dry environment for the brake pressure ring 4, and when the auxiliary sealing ring block 8 fails, the leakage liquid flows into the leakage passage 102 through the liquid cavity 101.

[0049] Finally, it should be noted that the above-described only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application have been described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the protection scope of the present application.

Claims

1. A six-axis CNC rotary table device, comprising a housing mounted on a six-axis base, and a motor and a central shaft sequentially disposed therein, wherein the drive end of the motor is connected to the central shaft, a brake pressure ring sleeved on the outer edge of the central shaft is disposed inside the housing, a sealing unit is disposed at the connection between the housing, the central shaft and the brake pressure ring, the gap between the housing and the brake pressure ring forms a fluid-feeding chamber, and a leakage passage is provided at the lower part of the housing and connected to the fluid-feeding chamber, wherein when the sealing unit leaks, the leaking fluid seeps in and is discharged sequentially through the fluid-feeding chamber and the leakage passage, characterized in that: A flexible ring box is arranged in a ring near the sealing unit in the liquid-following cavity. A liquid collection port and a liquid discharge port are respectively provided on the inner and outer ring walls of the flexible ring box. The liquid discharge port is connected to the leakage passage through the liquid-following cavity. An auxiliary sealing ring block is arranged in a ring on the inner ring wall of the flexible ring box, extending and covering the gap between the central shaft and the brake pressure ring. A top ring block, connected to the auxiliary sealing ring block, is provided on the inner side wall of the flexible ring box through the liquid collection port. A water-absorbing expansion plate, fixedly connected to the other inner side wall of the flexible ring box, is provided on the side of the top ring block. When the sealing unit fails, the leaking liquid enters the interior of the flexible ring box through the liquid collection port. The water-absorbing expansion plate absorbs water and expands laterally, and through the top ring block, the flexible ring box provides auxiliary sealing to the liquid inlet end of the liquid cavity. At the same time, the top ring block drives the auxiliary sealing ring block to provide auxiliary active sealing to the gap between the central shaft and the brake pressure ring. The leaking liquid flowing into the flexible ring box is discharged sequentially through the drain port, the liquid-following chamber, and the leakage passage.

2. The six-axis CNC rotary table equipment according to claim 1, characterized in that: The outer casing includes a front cover disposed on the outside of the sealing unit. The gap between the brake pressure ring and the front cover forms the fluid-passing chamber. The sealing unit includes an annular groove disposed at the connection between the central shaft, the brake pressure ring and the front cover and a sealing element. The sealing element is disposed inside the annular groove, and the annular groove and the fluid-passing chamber are connected.

3. The six-axis CNC rotary table equipment according to claim 2, characterized in that: One sidewall of the flexible ring box is embedded in the inner sidewall of the front cover, and the other sidewall is in sealing contact with the brake pressure ring. The top of the auxiliary sealing ring block extends into the ring groove, and the ring groove is provided with auxiliary sealing ring grooves on the sidewall of the central shaft and the sidewall of the fluid-following chamber relative to the brake pressure ring. The connection gap between the central shaft and the brake pressure ring is located between adjacent auxiliary sealing ring grooves. Sealing plugs are provided on the upper and lower parts of the sidewall of the auxiliary sealing ring block, and the sealing plugs are used to prevent leakage by sealing the auxiliary sealing ring grooves on the sidewall of the central shaft and the fluid-following chamber.

4. The six-axis CNC rotary table equipment according to claim 3, characterized in that: The top of the top ring block is provided with a liquid guiding inclined block located below the liquid collection port. The liquid guiding inclined block is used to guide the leaked liquid flowing into the liquid collection port to the side of the water absorption expansion plate. The upper end of the liquid guiding inclined block is provided with a connecting rod that passes through the liquid collection port. The top of the connecting rod is connected to the auxiliary sealing ring block.

5. The six-axis CNC rotary table equipment according to claim 4, characterized in that: A water-guiding block is provided at the connection between the water-absorbing expansion plate and the inner side wall of the flexible ring box. The water-guiding block has a liquid outlet hole. The water-guiding block immerses the leakage liquid introduced by the liquid guiding inclined block into the expansion part of the water-absorbing expansion plate. At the same time, the water-guiding block provides unilateral expansion direction support for the water-absorbing expansion plate. When the water-absorbing expansion plate absorbs water and expands, the connecting rod above the top ring block pushes the sealing plug ring and the auxiliary sealing ring groove of the upper and lower parts of the auxiliary sealing ring block to fit tightly to prevent leakage. After the leakage liquid immerses the water-absorbing expansion plate, it is discharged from the drain port through the liquid outlet hole.

6. The six-axis CNC rotary table equipment according to claim 4, characterized in that: The front cover has a strip groove on the side wall of the liquid-following chamber. The bottom end face of the flexible ring box is provided with a sealing strip. The sealing strip is used to seal the port of the strip groove to prevent leakage. The liquid outlet of the drain port extends into the inside of the strip groove. The insertion end of the sealing strip is provided with guide ribs arranged vertically. The bottom end face of the inside of the strip groove is connected to a drain pipe. The drain pipe is connected to the liquid inlet end of the leakage passage.

7. The six-axis CNC rotary table equipment according to claim 6, characterized in that: The main magnetic block is arranged inside the strip groove, and the secondary magnetic block that magnetically attracts the main magnetic block is arranged at the insertion end of the sealing strip.

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