A positive pressure gas-sealed waterproof and dustproof structure for a five-axis rotary table

Abstract

This invention proposes a positive pressure gas-sealed waterproof and dustproof structure for a five-axis rotary table. By setting up multiple layers of active and passive waterproof and dustproof structures, it prevents cutting fluid or debris from entering the rotary table. Even if liquid enters, it can be discharged from the rotary table through an internal circulation channel, preventing damage to expensive components such as bearings, coils, and electrical components due to seal failure, thus avoiding significant property losses and production delays. The multi-layered waterproof and dustproof structure greatly extends the service life of the seals and the maintenance time of the rotary table. The provided drainage and exhaust channels are used to promptly discharge cutting fluid that has entered the rotary table. Furthermore, the entire five-axis rotary table is equipped with a positive pressure air circuit, humidity sensor, and alarm system. In the event of a leak, an alarm message will be issued on the CNC machine tool's operation panel, but the rotary table can still continue to operate for a period of time, preventing significant losses such as coil burnout due to liquid ingress, thus improving safety.

Description

Technical Field

[0001] This invention relates to the field of equipment waterproofing and dustproofing technology, and more specifically, to a positive pressure air-sealed waterproofing and dustproofing structure for a five-axis turntable. Background Technology

[0002] A five-axis CNC machining center is a CNC machine tool used for subtractive processing of large materials. During the machining process, the cutting tool cuts the large material into sharp chips and powder particles. These chips and particles can easily cut or wear down the sealing lips of plastic sealing rings, allowing cutting fluid to enter the interior of the five-axis rotary table through the gaps. This can damage the bearings and burn out the coils inside the rotary table, resulting in significant economic losses. Furthermore, the five-axis rotary table is a component assembled onto the five-axis machine tool. If water ingress causes the rotary table to require repair, replacing the sealing rings, bearings, and coils is extremely inconvenient. It requires lifting and disassembling the entire rotary table at the customer's site using a crane to replace these components. After replacement, the rotary table must be reassembled, and the entire machine must be recalibrated, resulting in a huge workload. Many supporting tools are also required, and most customer workshops lack the necessary precision crane lifting facilities. This means that even replacing just the sealing rings, bearings, and coils requires the entire machine to be returned to the factory for repair, incurring high round-trip transportation and labor costs. Therefore, a five-axis rotary table rotary sealing system should ideally have the capability of being maintenance-free and having a long service life.

[0003] The closest patent publication number to this application is CN118081406A, which sets up a guide channel and multiple drainage mechanisms to guide the liquid out of the interior of the waterproof cradle five-axis turntable device. This effectively prevents liquid from entering the turntable and prevents liquid from accumulating inside the waterproof cradle five-axis turntable device. It also effectively avoids potential risks such as one-way valve blockage and air circuit component failure, making the structure simple and easy to maintain.

[0004] However, if the drainage mechanism or the flow channel is damaged, it still requires a huge amount of work to disassemble the entire turntable, and there are no protective measures to allow the turntable to continue working once a failure occurs. Therefore, the present invention adopts a multi-layer dustproof and waterproof structure, which greatly extends the service life of the sealing ring and the maintenance time of the turntable sealing ring. Summary of the Invention

[0005] In view of this, to solve the above problems, this invention proposes a positive pressure air-sealed waterproof and dustproof structure for a five-axis rotary table. By setting up multiple layers of active and passive waterproof and dustproof structures, it prevents cutting fluid or debris from entering the rotary table. The lip seal ring and the curved labyrinth-type air curtain ensure that the plastic seal ring is largely protected from damage by sharp cutting debris. The seal ring primarily isolates moisture, significantly extending its service life and reducing maintenance intervals. The rotary table also has drainage and exhaust channels to promptly drain any cutting fluid that has entered. Timely proactive warnings indicate leaks, eliminating the need for manual disassembly and inspection, thus improving intelligent production management. Proactive leak warnings also reduce the significant losses caused by undetected leaks leading to damage to other components. Furthermore, the entire five-axis rotary table is equipped with a positive pressure air circuit, humidity sensor, and alarm system. In the event of a leak, the machine tool operating system screen will display an alarm, but the rotary table can still operate for a period of time without disrupting production, thus improving safety.

[0006] A positive pressure gas-sealed waterproof and dustproof structure for a five-axis rotary table, the five-axis rotary table including a rotating shaft 1 and a worktable 2, one end of the rotating shaft 1 being connected to the worktable 2, the rotation of the rotating shaft 1 driving the worktable 2 to rotate, an upper cover 3 being axially fitted on the outer circle of the rotating shaft 1, and a waterproof and dustproof structure 4 being provided between the upper cover 3 and the worktable 2, characterized in that: the waterproof and dustproof structure 4 includes, from the outside to the inside, a first sealing structure 41, a curved labyrinth protection structure 42, and a second sealing structure 43, the first sealing structure 41 being located on the outermost ring, the upper part of the first sealing structure 41 being connected to the worktable 2, and the lower part being connected to the upper cover 3, the lower or upper part of the first sealing structure 41 extending outward to provide a lip 411 of a friction sealing ring for blocking dust and cutting fluid entering from the rotation gap; the curved labyrinth protection structure 42 includes a first protective cavity. 421, the first protective cavity 421 is filled with positive pressure gas flowing from the inside of the rotating shaft 1 to the outside. The first protective cavity 421 is narrow near the outermost flow channel opening, which makes the airflow speed faster when the continuously input positive pressure gas passes through, forming a curved labyrinth structure of air curtain protection to prevent waste and moisture from entering; the second sealing structure 43 is located in the innermost ring. The five-axis turntable is also provided with a second positive pressure flow channel 70. The second positive pressure flow channel 70 connects to the input end of all the cavity parts inside the five-axis turntable. The output end of all the cavity parts inside the five-axis turntable is connected to the drainage and exhaust channel 60. The low-pressure airflow of the second positive pressure flow channel 70 flows to all the cavity parts inside the five-axis turntable. After all the cavity parts inside the five-axis turntable have passed through, it is discharged from the drainage and exhaust channel 60.

[0007] In some embodiments, the workbench 2 is provided with a mounting groove 412 corresponding to the first sealing structure 41. When the body of the first sealing structure 41 is located in the mounting groove 412, the lip 411 of the friction sealing ring extends out of the mounting groove 412 and abuts against the upper surface of the upper cover 3. When the body of the first sealing structure 41 is connected to the upper surface of the upper cover 3, the lip 411 of the friction sealing ring extends towards the mounting groove 412 and abuts against the lower surface of the workbench 2.

[0008] Furthermore, the lip 411 of the friction seal ring is a thin sheet-like elastomer, which is a lip seal ring. When the input positive pressure gas passes through the contact point between the lip 411 of the friction seal ring and the upper surface of the upper cover 3 or the lower surface of the worktable 2, the lip 411 of the friction seal ring deforms outward and upward to form an airflow channel. This allows the cutting fluid and dust entering the gap from the outside to be blown out of the gap of the airflow channel and prevents them from entering the interior of the turntable.

[0009] In some embodiments, the first protective cavity 421 is composed of a series of staggered blocking blocks forming a winding maze. The series of blocking blocks includes a first blocking block 422 and a second blocking block 423. The first blocking block 422 is located at the lower end of the workbench 2, and the second blocking block 423 is located on the upper surface of the upper cover 3. A gap is provided between the first blocking block 422 and the second blocking block 423, which constitutes the first protective cavity 421.

[0010] Furthermore, the input end of the first protective cavity 421 is connected to the output end of an externally accessed positive pressure gas flow channel 44. The input end of the positive pressure gas flow channel 44 is connected to an externally accessed positive pressure gas delivery device, so that when the continuously input positive pressure gas passes through, the wind speed is accelerated, forming a curved labyrinth structure of air curtain protection to prevent waste and water vapor from entering.

[0011] In some embodiments, the second sealing structure 43 includes a plurality of spaced-apart sealing rings 431, which are disposed between the outer circle of the rotating shaft 1 and the inner circle of the upper cover 3. A second protective cavity 432 is provided at the interval between two adjacent sealing rings 431. The second protective cavity 432 is filled with non-flowing positive pressure gas, so that when the sealing ring 431 is damaged, the positive pressure gas will flow out from the damaged point to the outside of the turntable. At this time, the cutting fluid cannot enter the inside of the turntable. When the gas in the second protective cavity 432 is depressurized, the pressure sensor will actively alarm, indicating that the sealing ring 431 needs to be replaced.

[0012] Furthermore, the input end of the second protective cavity 432 is connected to the output end of the first positive pressure flow channel 45. A pressure sensor is provided on the first positive pressure flow channel 45. The input end of the first positive pressure flow channel 45 is connected to a gas delivery device for non-flowing positive pressure gas, so as to form a pressure cavity inside the second protective cavity 432 that is higher than the normal pressure, thereby preventing cutting fluid and dirt from the external low-pressure area from entering the turntable. When the sealing ring 431 is damaged, the pressure sensor pressure decreases and an alarm is triggered; thus intelligently detecting that the sealing ring 431 is damaged and needs to be replaced.

[0013] Furthermore, the positive pressure gas is dried and filtered before being introduced.

[0014] Furthermore, a gas electronic control system is installed at the protective flow channel. If the sealing ring 431 or the first sealing structure 41 is damaged, the gas pressure in the corresponding second protective cavity 432 will decrease, and the gas electronic control system will sound an alarm. If the first sealing structure 41 is damaged, the gas pressure in the corresponding positive pressure gas flow channel 44 will decrease, indicating that the turntable is depressurized. The user will know immediately that the sealing ring 431 or the first sealing structure 41 needs to be replaced. At this time, the entire turntable is not flooded, and the depressurized sealing ring 431 or the first sealing structure 41 will blow air from the leak point to the dirty side to prevent dust and liquid from entering the turntable. The turntable only needs to replace the sealing ring 431 or the first sealing structure 41, which will not cause more serious damage. The turntable can still be used normally for a period of time without causing the user to have to stop the machine immediately, thus improving safety.

[0015] Furthermore, the five-axis rotary table also includes a swing arm and a tailstock. The worktable 2, the swing arm, and the tailstock are all provided with a third sealing structure 5 at the connection points. The third sealing structure 5 has the same structure as the second sealing structure 43.

[0016] Furthermore, the output end of the housing of the drainage and exhaust channel 60 is equipped with an external exhaust valve and a humidity sensor. The external exhaust valve is a one-way valve, which only allows gas or liquid to be discharged from the five-axis turntable.

[0017] Furthermore, the humidity sensor is used to trigger an alarm when there is a liquid leak inside the five-axis turntable. Under normal circumstances, the low-pressure airflow of the second positive pressure channel 70 flows through all the cavities inside the five-axis turntable. After the airflow passes through all the cavities inside the five-axis turntable, it is discharged from the drainage and exhaust channel 60. When there is a leak in any of the cavities inside the five-axis turntable, the leaked liquid will also flow along with the low-pressure airflow of the second positive pressure channel 70 to the drainage and exhaust channel 60. At this time, the humidity sensor detects the liquid leak and sends an alarm to the system indicating a possible seal leak, actively detecting the humidity inside the turntable.

[0018] Furthermore, observation screws are provided on the rear cover of the swing arm drive shaft and the rear cover of the worktable 2, so that the screws can be loosened to directly observe whether there is water leakage inside the turntable.

[0019] Furthermore, the entire five-axis turntable is hollow inside and contains pressurized positive pressure gas and pressure sensors. If the pressure inside the turntable is released, an automatic pressure relief alarm will be triggered.

[0020] The beneficial effects of this invention are as follows: This invention proposes a positive pressure air-sealed waterproof and dustproof structure for a five-axis rotary table. By setting up a multi-layered active and passive waterproof and dustproof structure, it prevents cutting fluid or debris from entering the rotary table. The lip seal ring and the curved labyrinth-type air curtain ring can protect the plastic sealing ring from being cut by sharp cutting debris. The sealing ring is mainly used to isolate moisture, which can greatly extend the service life of the sealing ring and the maintenance time of the rotary table sealing ring. The rotary table also has a drainage and exhaust channel 60 to promptly drain the cutting fluid that has entered the rotary table. Timely active early warning indicates that the rotary table has leaked, eliminating the need for manual disassembly and inspection, thus improving intelligent production management. Active leak warning can also reduce the significant losses caused by the failure to detect leaks and resulting in damage to other components. In addition, the entire five-axis rotary table is equipped with a positive pressure air circuit, humidity sensor and alarm system. Once a leak occurs, the machine tool operating system screen will pop up an alarm, but the rotary table can still operate for a period of time without interrupting production, thus improving safety. Attached Figure Description

[0021] Figure 1 This is a perspective view of the five-axis rotary table of the present invention.

[0022] Figure 2 This is an overall cross-sectional view of the five-axis rotary table of the present invention.

[0023] Figure 3 This is a partially enlarged structural view of part A of the positive pressure gas-sealed waterproof and dustproof structure of the five-axis rotary table of the present invention.

[0024] Figure 4 This is a partially enlarged structural diagram of part B of the positive pressure gas-sealed waterproof and dustproof structure of the five-axis rotary table of the present invention.

[0025] Figure 5 This is a partially enlarged structural view of part C of the positive pressure gas-sealed waterproof and dustproof structure of the five-axis rotary table of the present invention.

[0026] Figure 6 This is a partially enlarged structural diagram of part D of the positive pressure gas-sealed waterproof and dustproof structure of the five-axis rotary table of the present invention.

[0027] Explanation of main component symbols

[0028] Rotating shaft 1, worktable 2, top cover 3, waterproof and dustproof structure 4, first sealing structure 41, lip of friction sealing ring 411, mounting groove 412, curved labyrinth protection structure 42, first protective cavity 421, first blocking block 422, second blocking block 423, second sealing structure 43, sealing ring 431, second protective cavity 432, positive pressure gas flow channel 44, first positive pressure flow channel 45, third sealing structure 5, drainage and exhaust channel 60, second positive pressure flow channel 70.

[0029] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0030] like Figure 1 The image shown is a perspective view of the five-axis rotary table of the present invention; as shown... Figure 2 The image shown is an overall cross-sectional view of the five-axis rotary table of the present invention; as shown... Figure 3 The image shown is a partially enlarged structural view of part A of the positive pressure air-sealed waterproof and dustproof structure of the five-axis rotary table of the present invention; as shown... Figure 4 The image shown is a partially enlarged structural view of part B of the positive pressure gas-sealed waterproof and dustproof structure of the five-axis rotary table of the present invention; as shown... Figure 5 The image shown is a partially enlarged structural diagram of section C of the positive pressure gas-sealed waterproof and dustproof structure of the five-axis rotary table of the present invention; as shown... Figure 6 The diagram shown is a partially enlarged view of part D of the positive pressure gas-sealed waterproof and dustproof structure of the five-axis rotary table of the present invention. Example

[0031] A positive pressure gas-sealed waterproof and dustproof structure for a five-axis rotary table, the five-axis rotary table including a rotating shaft 1 and a worktable 2, one end of the rotating shaft 1 being connected to the worktable 2, the rotation of the rotating shaft 1 driving the worktable 2 to rotate, an upper cover 3 being axially fitted on the outer circle of the rotating shaft 1, and a waterproof and dustproof structure 4 being provided between the upper cover 3 and the worktable 2, characterized in that: the waterproof and dustproof structure 4 includes, from the outside to the inside, a first sealing structure 41, a curved labyrinth protection structure 42, and a second sealing structure 43, the first sealing structure 41 being located on the outermost ring, the upper part of the first sealing structure 41 being connected to the worktable 2, and the lower part being connected to the upper cover 3, the lower or upper part of the first sealing structure 41 extending outward to provide a lip 411 of a friction sealing ring for blocking dust and cutting fluid entering from the rotation gap; the curved labyrinth protection structure 42 includes a first protective cavity. 421, the first protective cavity 421 is filled with positive pressure gas flowing from the inside of the rotating shaft 1 to the outside. The first protective cavity 421 is narrow near the outermost flow channel opening, which makes the airflow speed faster when the continuously input positive pressure gas passes through, forming a curved labyrinth structure of air curtain protection to prevent waste and moisture from entering; the second sealing structure 43 is located in the innermost ring. The five-axis turntable is also provided with a second positive pressure flow channel 70. The second positive pressure flow channel 70 connects to the input end of all the cavity parts inside the five-axis turntable. The output end of all the cavity parts inside the five-axis turntable is connected to the drainage and exhaust channel 60. The low-pressure airflow of the second positive pressure flow channel 70 flows to all the cavity parts inside the five-axis turntable. After all the cavity parts inside the five-axis turntable have passed through, it is discharged from the drainage and exhaust channel 60.

[0032] The workbench 2 is provided with a mounting groove 412 corresponding to the first sealing structure 41. When the body of the first sealing structure 41 is located in the mounting groove 412, the lip 411 of the friction sealing ring extends out of the mounting groove 412 and abuts against the upper surface of the upper cover 3. When the body of the first sealing structure 41 is connected to the upper surface of the upper cover 3, the lip 411 of the friction sealing ring extends towards the mounting groove 412 and abuts against the lower surface of the workbench 2.

[0033] The lip 411 of the friction seal ring is a thin sheet-like elastomer, which is a lip seal ring. When the input positive pressure gas passes through the contact point between the lip 411 of the friction seal ring and the upper surface of the upper cover 3 or the lower surface of the worktable 2, the lip 411 of the friction seal ring deforms outward and upward to form an airflow channel. This allows the cutting fluid and dust that have entered the gap from the outside to be blown out of the gap of the airflow channel and cannot enter the interior of the turntable.

[0034] The first protective cavity 421 is composed of a series of staggered blocking blocks forming a winding maze. The blocking blocks include a first blocking block 422 and a second blocking block 423. The first blocking block 422 is located at the lower end of the workbench 2, and the second blocking block 423 is located on the upper surface of the upper cover 3. The gap between the first blocking block 422 and the second blocking block 423 constitutes the first protective cavity 421.

[0035] The input end of the first protective cavity 421 is connected to the output end of an externally accessed positive pressure gas flow channel 44. The input end of the positive pressure gas flow channel 44 is connected to an externally accessed positive pressure gas delivery device, so that when the continuously input positive pressure gas passes through, the wind speed is accelerated, forming a curved labyrinth structure of air curtain protection to prevent waste and water vapor from entering.

[0036] The second sealing structure 43 includes a plurality of spaced sealing rings 431, which are disposed between the outer circle of the rotating shaft 1 and the inner circle of the upper cover 3. A second protective cavity 432 is provided at the interval between two adjacent sealing rings 431. The second protective cavity 432 is filled with non-flowing positive pressure gas, so that when the sealing ring 431 is damaged, the positive pressure gas will flow out from the damaged point to the outside of the turntable. At this time, the cutting fluid cannot enter the inside of the turntable. When the gas in the second protective cavity 432 is depressurized, the pressure sensor will actively alarm, indicating that the sealing ring 431 needs to be replaced.

[0037] The input end of the second protective cavity 432 is connected to the output end of the first positive pressure channel 45. A pressure sensor is provided on the first positive pressure channel 45. The input end of the first positive pressure channel 45 is connected to a gas delivery device for non-flowing positive pressure gas, so that a pressure cavity higher than normal pressure is formed inside the second protective cavity 432, thereby preventing cutting fluid and dirt from the external low-pressure area from entering the turntable. When the sealing ring 431 is damaged, the pressure sensor pressure decreases and an alarm is triggered; thus intelligently detecting that the sealing ring 431 is damaged and needs to be replaced.

[0038] The positive pressure gas is dried and filtered before being introduced.

[0039] The protective flow channel is equipped with a gas electronic control system. If the sealing ring 431 or the first sealing structure 41 is damaged, the gas pressure in the corresponding second protective cavity 432 will decrease, and the gas electronic control system will sound an alarm. If the first sealing structure 41 is damaged, the gas pressure in the corresponding positive pressure gas flow channel 44 will decrease, indicating that the turntable is depressurized. The user will know immediately that the sealing ring 431 or the first sealing structure 41 needs to be replaced. At this time, the entire turntable is not flooded, and the depressurized sealing ring 431 or the first sealing structure 41 will blow air from the leak point to the dirty side to prevent dust and liquid from entering the turntable. The turntable only needs to replace the sealing ring 431 or the first sealing structure 41, which will not cause more serious damage. The turntable can still be used normally for a period of time without causing the user to have to shut down the machine immediately, thus improving safety.

[0040] The five-axis rotary table also includes a swing arm and a tailstock. The worktable 2, the swing arm and the tailstock are all provided with a third sealing structure 5 at the connection points. The third sealing structure 5 has the same structure as the second sealing structure 43.

[0041] The output end of the outer shell of the drainage and exhaust channel 60 is equipped with an external exhaust valve and a humidity sensor. The external exhaust valve is a one-way valve, which only allows gas or liquid to be discharged from the five-axis turntable. The humidity sensor is used to alarm when there is liquid leakage inside the five-axis turntable. Under normal circumstances, the low-pressure airflow of the second positive pressure flow channel 70 flows into all the cavities inside the five-axis turntable. After all the cavities inside the five-axis turntable have been emptied, the liquid is discharged from the drainage and exhaust channel 60. When there is liquid leakage in all the cavities inside the five-axis turntable, the leaked liquid will also flow with the low-pressure airflow of the second positive pressure flow channel 70 to the drainage and exhaust channel 60. At this time, the humidity sensor detects liquid leakage and sends an alarm to the system for suspected seal leakage, actively detecting the humidity inside the turntable.

[0042] Both the rear cover of the swing arm drive shaft and the rear cover of the worktable 2 are equipped with observation screws, which make it easy to loosen the screws and directly observe whether there is water leakage inside the turntable.

[0043] The entire five-axis turntable is hollow inside and contains pressurized positive pressure gas and pressure sensors. If the pressure inside the turntable is released, it will automatically trigger a pressure relief alarm.

[0044] The beneficial effects of this invention are as follows: This invention proposes a positive pressure air-sealed waterproof and dustproof structure for a five-axis rotary table. By setting up a multi-layered active and passive waterproof and dustproof structure, it prevents cutting fluid or debris from entering the rotary table. The lip seal ring and the curved labyrinth-type air curtain ring can protect the plastic sealing ring from being cut by sharp cutting debris. The sealing ring is mainly used to isolate moisture, which can greatly extend the service life of the sealing ring and the maintenance time of the rotary table sealing ring. The rotary table also has a drainage and exhaust channel 60 to promptly drain the cutting fluid that has entered the rotary table. Timely active early warning indicates that the rotary table has leaked, eliminating the need for manual disassembly and inspection, thus improving intelligent production management. Active leak warning can also reduce the significant losses caused by the failure to detect leaks and resulting in damage to other components. In addition, the entire five-axis rotary table is equipped with a positive pressure air circuit, humidity sensor and alarm system. Once a leak occurs, the machine tool operating system screen will pop up an alarm, but the rotary table can still operate for a period of time without interrupting production, thus improving safety.

[0045] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A positive pressure air-tight seal waterproof and dustproof structure of a five-axis rotary table, the five-axis rotary table comprising a rotating shaft (1) and a worktable (2), one end of the rotating shaft (1) being connected to the worktable (2), the rotating shaft (1) rotating to drive the worktable (2) to rotate, an upper cover (3) being arranged in the axial direction of the outer circle of the rotating shaft (1), and a waterproof and dustproof structure (4) being arranged between the upper cover (3) and the worktable (2), characterized in that: The waterproof and dustproof structure (4) includes, from the outside to the inside, a first sealing structure (41), a curved labyrinth protection structure (42), and a second sealing structure (43). The first sealing structure (41) is located on the outermost ring. The upper part of the first sealing structure (41) is connected to the workbench (2), and the lower part is connected to the top cover (3). The lower or upper part of the first sealing structure (41) extends outward to provide the lip (411) of the friction sealing ring, which is used to block dust and cutting fluid from entering through the rotating gap. The curved labyrinth protection structure (42) includes a first protective cavity (421). The first protective cavity (421) is filled with positive pressure gas flowing from the inside of the rotating shaft (1) to the outside. 1) The narrow opening near the outermost flow channel makes the airflow speed faster when the continuously input positive pressure gas passes through, forming a curved labyrinth structure of air curtain protection to prevent waste and water vapor from entering; the second sealing structure (43) is located in the innermost ring, and the five-axis turntable is also provided with a second positive pressure flow channel (70). The second positive pressure flow channel (70) is connected to the input end of all the cavity parts inside the five-axis turntable, and the output end of all the cavity parts inside the five-axis turntable is connected to the drainage and exhaust channel (60). The low-pressure airflow of the second positive pressure flow channel (70) flows to all the cavity parts inside the five-axis turntable. After all the cavity parts inside the five-axis turntable have passed through, they are discharged from the drainage and exhaust channel (60). ​ 2. The positive pressure air-tight seal waterproof and dustproof structure of the five-axis rotary table according to claim 1, characterized in that: The workbench (2) is provided with a mounting groove (412) corresponding to the first sealing structure (41). When the body of the first sealing structure (41) is located in the mounting groove (412), the lip (411) of the friction sealing ring extends out of the mounting groove (412) and abuts against the upper surface of the cover (3). When the body of the first sealing structure (41) is connected to the upper surface of the cover (3), the lip (411) of the friction sealing ring extends towards the mounting groove (412) and abuts against the lower surface of the workbench (2).

3. The positive pressure air-sealed waterproof and dustproof structure of the five-axis rotary table as described in claim 1, characterized in that: The lip (411) of the friction seal ring is a thin sheet-like elastomer. The thin sheet-like elastomer is a lip seal ring. When the positive pressure gas enters and passes through the contact point between the lip (411) of the friction seal ring and the upper surface of the upper cover (3) or the lower surface of the worktable (2), the lip (411) of the friction seal ring deforms outward and upward to form an airflow channel. This allows the cutting fluid and dust entering the gap from the outside to be blown out of the gap of the airflow channel and unable to enter the turntable.

4. The positive pressure air-sealed waterproof and dustproof structure of the five-axis rotary table as described in claim 1, characterized in that: The first protective cavity (421) is composed of a series of staggered blocking blocks forming a winding maze. The blocking blocks include a first blocking block (422) and a second blocking block (423). The first blocking block (422) is located at the lower end of the workbench (2), and the second blocking block (423) is located on the upper surface of the cover (3). The gap between the first blocking block (422) and the second blocking block (423) is the first protective cavity (421).

5. The positive pressure air-sealed waterproof and dustproof structure of the five-axis rotary table as described in claim 1, characterized in that: The first protective cavity (421) has an output end of an externally connected positive pressure gas channel (44) at its input end. The input end of the positive pressure gas channel (44) is connected to an externally connected positive pressure gas delivery device, so that the wind speed of the continuously input positive pressure gas is accelerated when it passes through, forming a curved labyrinth structure of air curtain protection to prevent waste and water vapor from entering.

6. The positive pressure air-sealed waterproof and dustproof structure of the five-axis rotary table as described in claim 1, characterized in that: The second sealing structure (43) includes a plurality of spaced sealing rings (431), which are disposed between the outer circle of the rotating shaft (1) and the inner circle of the upper cover (3). A second protective cavity (432) is provided at the interval between two adjacent sealing rings (431), and a non-flowing positive pressure gas is provided in the second protective cavity (432).

7. The positive pressure air-sealed waterproof and dustproof structure of the five-axis rotary table as described in claim 6, characterized in that: The input end of the second protective cavity (432) is connected to the output end of the first positive pressure channel (45). The first positive pressure channel (45) is equipped with a pressure sensor. The input end of the first positive pressure channel (45) is connected to a gas delivery device for non-flowing positive pressure gas, so that a pressure cavity higher than normal pressure is formed inside the second protective cavity (432), thereby preventing cutting fluid and dirt from entering the turntable from the external low pressure area. When the sealing ring (431) is damaged, the pressure sensor pressure decreases and an alarm is triggered; thus intelligently detecting that the sealing ring (431) is damaged and needs to be replaced.

8. The positive pressure gas-sealed waterproof and dustproof structure of the five-axis rotary table as described in claim 1, characterized in that: The five-axis rotary table also includes a swing arm and a tailstock. The worktable (2), the swing arm and the tailstock are all connected by a third sealing structure (5). The third sealing structure (5) has the same structure as the second sealing structure (43).

9. The positive pressure air-sealed waterproof and dustproof structure of the five-axis rotary table as described in claim 1, characterized in that: The outlet of the drain and exhaust channel (60) is equipped with an exhaust valve and a humidity sensor. The exhaust valve is a one-way valve that only allows gas or liquid to be discharged from the five-axis turntable.

10. The positive pressure gas-sealed waterproof and dustproof structure of the five-axis rotary table as described in claim 9, characterized in that: The humidity sensor is used to alarm when there is liquid leakage inside the five-axis turntable. Under normal circumstances, the low-pressure airflow of the second positive pressure flow channel (70) flows to all the cavity parts inside the five-axis turntable. After all the cavity parts inside the five-axis turntable have been flowed through, they are discharged from the drainage and exhaust channel (60). When there is liquid leakage in all the cavity parts inside the five-axis turntable, the leaked liquid will also flow to the drainage and exhaust channel (60) along with the low-pressure airflow of the second positive pressure flow channel (70). At this time, the humidity sensor detects that liquid is leaking out and sends an alarm to the system for suspected sealing ring leakage, actively detecting the humidity inside the turntable.

Images