A closed dual air path slip ring

Abstract

The present application relates to a closed dual-air path slip ring, and relates to the field of slitting and winding equipment. The closed dual-air path slip ring comprises a ring body, the inner wall of the ring body is provided with a first vent hole, the outer wall of the ring body is provided with a plurality of inclined blocks slidingly arranged along the circumferential direction, the outer surface of the inclined block is provided with a friction portion, the ring body is provided with a piston hole connected with the first vent hole, the piston hole is provided with a piston block slidingly arranged, one side of the piston hole is abutted with an inclined wedge base, the inclined surface of the inclined wedge base abuts with the inclined surface of the inclined block; the inner wall of the ring body is provided with a second vent hole, the ring body is provided with an installation groove, the installation groove is connected with the second vent hole, and the installation groove is provided with a rolling portion that can fit with the inner wall of the winding core. The present application has the effect of improving the convenience of the winding core disassembly process, avoiding the winding core from getting stuck, and thus reducing the burden of the winding core removal operation.

Description

Technical Field

[0001] The present application relates to the field of slitting and winding equipment, and in particular to a closed dual-air path slip ring. Background Art

[0002] In the existing film coil production, winding and unwinding are mainly carried out by using a slip shaft. The working principle of the slip shaft winding and unwinding is mainly to use air pressure to push up the expansion block and then tighten the winding core, so that the winding core can rotate synchronously with the slip shaft for winding and unwinding.

[0003] When in use, the differential ring needs to be installed on the drive shaft. The ventilation duct on the drive shaft is connected to the air path of the differential ring. Then the core is sleeved on the differential ring, and high-pressure gas is introduced through the drive shaft air path. As a result, the multiple inclined blocks on the differential ring expand outward synchronously, and the friction part on the outer surface of the inclined block presses against the inner wall of the core, so that the differential ring and the core are tightly embraced, thereby realizing the rotation of the core.

[0004] When the coil on the core is completed or the core fails, the drive shaft stops supplying air to the air circuit, and then the core needs to be separated from the differential ring to remove the core. At this time, although the multiple inclined blocks no longer have the outward thrust, they cannot retract and reset, and they will still remain in contact with the inner wall of the core. This results in the movement of the core being obstructed when the core is extracted from the differential ring, making it difficult to extract the core. Since multiple differential rings and multiple cores are often installed on a drive shaft, this will bring a greater burden to the removal of the core. Summary of the invention

[0005] In order to improve the situation in the prior art where the inclined block remains in contact with the inner wall of the core when the core is removed from the differential slip ring, resulting in obstruction in the movement of the core and great difficulty in extracting the core, the present application provides a closed dual-air path differential slip ring.

[0006] The closed dual-air path slip ring provided in the present application adopts the following technical solution:

[0007] A closed dual-air path differential slip ring comprises a ring body, the inner wall of the ring body is provided with a first air vent, the outer wall of the ring body is provided with a plurality of inclined blocks slidingly arranged along the circumferential direction, the outer surface of the inclined blocks is provided with a friction portion, the ring body is provided with a piston hole connected with the first air vent, the piston block is slidably arranged in the piston hole, one side of the piston hole abuts against an inclined wedge base, the inclined surface of the inclined wedge base abuts against the inclined surface of the inclined block; the inner wall of the ring body is provided with a second air vent, the ring body is provided with a mounting groove, the mounting groove is connected with the second air vent, and a rolling portion that can fit with the inner wall of a winding core is slidably arranged in the mounting groove.

[0008] By adopting the above technical solution, when the differential ring is in use, the ring body is sleeved on the driving shaft, and the winding core is sleeved on the ring body, and high-pressure gas is introduced into the first air vent through the driving shaft, and the high-pressure gas enters the piston hole to drive the piston block to move, and the movement of the piston block drives the movement of the inclined wedge base, and the inclined wedge base then pushes the inclined block to expand outward so that the friction part of the inclined block is pressed against the winding core, thereby making the differential ring and the winding core hold tightly, so as to realize the rotation of the winding core; and when the winding core needs to be disassembled, the ventilation to the first air vent is stopped, and the gas is introduced into the second air vent, and the gas enters the installation groove through the second air vent, thereby pushing the rolling part to slide, and the rolling part slides outward to fit with the inner wall of the winding core, and then when the winding core is pulled out, the rolling part rolls to make the movement of the winding core smooth, thereby improving the convenience of the winding core disassembly process, avoiding the winding core from being stuck, and thereby reducing the burden of the winding core removal operation.

[0009] Optionally, the rolling portion includes a mounting seat slidably disposed in the mounting groove, a roller is rotatably disposed on the mounting seat, and a rotation direction of the roller is parallel to the axial direction of the ring body.

[0010] By adopting the above technical solution, when the gas enters the installation groove, the mounting seat slides in the installation groove under the push of the airflow, and the roller slides with the mounting seat to fit with the inner wall of the core. Since the rotation direction of the roller is parallel to the axial direction of the ring body, the core can be smoothly extracted along the axial direction of the ring body. In addition, since the rotation direction of the roller is parallel to the axial direction of the ring body, when the core rotates circumferentially with the differential ring, even if part of the roller expands outward, it will not affect the tight hold of the differential ring and the core.

[0011] Optionally, a matching hole connected to the first ventilation hole is opened in the ring body, and a push plate is provided on the rolling part, and the push plate is opposite to the matching hole on one side close to the winding core and opposite to the second ventilation hole on the other side.

[0012] By adopting the above technical solution, since the first air hole and the second air hole are respectively arranged opposite to the two sides of the push plate, the airflow blown out through the second air hole pushes the push plate to move in the direction close to the winding core, and the airflow entering the matching hole through the first air hole can push the push plate to move in the direction close to the driving shaft, and the movement of the push plate drives the rolling part to move.

[0013] When the differential ring is in use, gas enters the first vent hole and then enters the piston hole, thereby pushing the piston block to move. In this process, part of the airflow enters the matching hole, thereby pushing the push plate to maintain the trend of moving toward the drive shaft. The rolling portion and the push plate have the same movement trend, thereby preventing the rolling portion from fitting against the inner wall of the winding core when the differential ring is in operation, thereby affecting the clamping of the differential ring and the winding core.

[0014] Optionally, a one-way air valve is installed in the mating hole, and gas can flow from the first vent hole to the mating hole through the one-way air valve.

[0015] By adopting the above technical solution, the setting of the matching hole enables the first air hole and the second air hole to be indirectly connected. In order to prevent the high-pressure gas introduced into the second air hole from leaking into the first air hole through the matching hole, causing the inclined block to be pushed outward again, the flow direction of the gas in the matching hole is restricted by a one-way air valve. The existence of the one-way air valve allows the gas in the first air hole to flow into the matching hole, while the gas in the matching hole cannot flow back to the first air hole.

[0016] Optionally, a first spring is arranged in the mounting groove, one end of the first spring is connected to the rolling portion, and the other end of the first spring is connected to the mounting groove.

[0017] By adopting the above technical solution, when the rolling part slides outward and fits against the inner wall of the core, the first spring is in a twisted and deformed state, and after the core is disassembled and the rolling part no longer needs to fit against the inner wall of the core, ventilation to the second vent hole is stopped, and the rolling part will not be subject to an outward push force. Under the action of the first spring rebound, the rolling part moves in a direction close to the drive shaft to reset, so that when a new core is subsequently installed, the rolling part fits against the inner wall of the new core, thereby affecting the clamping of the differential ring and the new core.

[0018] Optionally, a first limit plate is arranged in the installation groove, and a second limit plate is arranged on the rolling portion, and the second limit plate abuts against the first limit plate to limit the sliding range of the second limit plate.

[0019] By adopting the above technical solution, gas is introduced into the installation groove to drive the rolling part to slide outward. When the winding core has not separated from the slip ring, the rolling part will not separate from the installation groove due to the obstruction of the inner wall of the winding core. At the moment when the winding core separates from the slip ring, in order to prevent the airflow from directly pushing the rolling part out of the installation groove, the sliding range of the rolling part is limited by the cooperation of the first limit plate and the second limit plate. The second limit plate slides along with the sliding of the rolling part in the installation groove. When the second limit plate slides to abut against the first limit plate, the sliding of the second limit plate is restricted, and the sliding of the rolling part is therefore also restricted, thereby preventing the rolling part from separating from the installation groove.

[0020] Optionally, outer surfaces of the plurality of inclined blocks are provided with sleeve grooves, and the same elastic ring is sleeved in the plurality of sleeve grooves.

[0021] By adopting the above technical solution, the elastic ring is sleeved in the sleeve grooves on the multiple inclined blocks, and the inclined blocks are thereby connected to the differential ring. When the differential ring is in use, the movement of the wedge-shaped base drives the multiple inclined blocks to expand synchronously, and the differential ring then holds the winding core tightly. During this process, the elastic ring is in a tensioned state. When the winding core needs to be disassembled, the ventilation to the first vent hole is stopped. At this time, the rebound of the elastic ring will drive the multiple inclined blocks to move in the direction close to the drive shaft to a certain extent, thereby making the multiple inclined blocks away from the inner wall of the winding core, thereby further improving the convenience of the winding core disassembly process.

[0022] Optionally, a guide rod radially parallel to the ring body is provided in the ring body, and a guide groove for sliding of the end of the guide rod is formed at one end of the inclined block away from the inclined wedge base.

[0023] By adopting the above technical solution, when the inclined block slides, the end of the guide rod slides in the guide groove, and the guide rod and the guide groove cooperate to limit the sliding direction of the inclined block, thereby improving the stability of multiple inclined blocks during synchronous expansion and synchronous contraction.

[0024] Optionally, a second spring is sleeved on the guide rod, one end of the second spring is connected to the ring body, and the other end of the second spring is connected to the inclined block.

[0025] By adopting the above technical solution, when the multiple inclined blocks expand outward synchronously, the second spring is in a twisted and deformed state. When the suction disassembly is required, the ventilation to the first vent hole is stopped. At this time, the inclined blocks will not be subject to the outward pushing force. Under the action of the second spring rebound, the multiple inclined blocks move in the direction close to the drive shaft, and the friction parts on the multiple inclined blocks are separated from the inner wall of the winding core, thereby improving the convenience of the winding core disassembly process.

[0026] Optionally, one end of the guide rod is fixedly connected to the ring body, and the other end is provided with a first anti-slip plate, and a second anti-slip plate is provided in the guide groove, and the second anti-slip plate abuts against the first anti-slip plate to limit the first anti-slip plate from detaching from the guide groove.

[0027] By adopting the above technical solution, when the end of the guide rod slides in the guide groove, the first anti-slip plate also slides in the guide groove, and the first anti-slip plate and the second anti-slip plate cooperate with each other to limit the sliding range of the first anti-slip plate to prevent the first anti-slip plate from separating from the guide groove, thereby preventing the guide rod from separating from the guide groove, and further preventing the guide rod from having difficulty re-entering the guide groove after the guide rod separates from the guide groove, thereby preventing the movement of the inclined block from being hindered.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. When the core needs to be disassembled, stop venting to the first vent hole and pass the gas into the second vent hole. The gas enters the installation groove through the second vent hole, thereby pushing the rolling part to slide. The rolling part slides outward to fit with the inner wall of the core. When the core is subsequently removed, the rolling part rolls to make the core move smoothly, thereby improving the convenience of the core disassembly process, avoiding the core from getting stuck, and reducing the burden of the core removal operation;

[0030] 2. When the differential ring is in use, the gas enters the first vent hole and then the piston hole, and the piston block is pushed to move. In this process, part of the gas flow enters the matching hole, thereby pushing the push plate to maintain the trend of moving toward the drive shaft. The rolling part and the push plate have the same movement trend, thereby preventing the rolling part from fitting with the inner wall of the winding core when the differential ring is in operation, thereby affecting the tightness of the differential ring and the winding core;

[0031] 3. The elastic ring is sleeved in the sleeve grooves on the multiple inclined blocks, and the inclined blocks are thereby connected to the differential ring. When the differential ring is in use, the movement of the wedge-shaped base drives the multiple inclined blocks to expand synchronously, and the differential ring then holds the winding core tightly. During this process, the elastic ring is in a tensioned state. When the winding core needs to be disassembled, the ventilation to the first vent hole is stopped. At this time, the rebound of the elastic ring will drive the multiple inclined blocks to move in the direction close to the drive shaft to a certain extent, thereby making the multiple inclined blocks away from the inner wall of the winding core, thereby further improving the convenience of the winding core disassembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of a closed dual-air path slip ring in an embodiment of the present application;

[0033] Figure 2 is a cross-sectional view of an embodiment of the present application;

[0034] Figure 3 yes Figure 2 A magnified view of part A;

[0035] Figure 4 yes Figure 2 Magnified view of part B.

[0036] Explanation of the accompanying drawings: 1. Ring body; 2. First air vent; 3. Bevel block; 4. Friction part; 5. Piston hole; 6. Piston block; 7. Bevel wedge base; 8. Second air vent; 9. Mounting groove; 10. Rolling part; 101. Mounting seat; 102. Roller; 11. Matching hole; 12. Push plate; 13. One-way air valve; 14. First spring; 15. First limit plate; 16. Second limit plate; 17. Sleeve groove; 18. Elastic ring; 19. Guide rod; 20. Guide groove; 21. Second spring; 22. First anti-slip plate; 23. Second anti-slip plate. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-4 This application is described in further detail.

[0038] The embodiment of the present application discloses a closed dual-air path slip ring. Figure 1 and Figure 2 The closed dual-air path differential slip ring includes a ring body 1, a plurality of first air vents 2 are circumferentially provided on the inner wall of the ring body 1, a plurality of inclined blocks 3 are slidably provided on the outer wall of the ring body 1 along the circumferential direction, a friction portion 4 is provided on the outer surface of the inclined block 3, a piston hole 5 connected with the first air vent 2 is provided in the ring body 1, a piston block 6 is slidably provided in the piston hole 5, one side of the piston hole 5 abuts against an inclined wedge base 7, and the inclined surface of the inclined wedge base 7 abuts against the inclined surface of the inclined block 3; a plurality of second air vents 8 are circumferentially provided on the inner wall of the ring body 1, a mounting groove 9 is provided in the ring body 1, the mounting groove 9 is connected with the second air vent 8, and a rolling portion 10 capable of fitting with the inner wall of the winding core is slidably provided in the mounting groove 9.

[0039] In the embodiment of the present application, the piston hole 5 is an annular hole, the piston hole 5 is connected to multiple first air holes 2 at the same time, and the piston hole 5 is an annular block; multiple mounting grooves 9 are opened on the ring body 1, and a rolling portion 10 is slidably provided in each mounting groove 9, and each mounting groove 9 is connected to a second air hole 8.

[0040] Reference Figure 2 and Figure 3 The rolling part 10 includes a mounting seat 101 which is vertically slidably arranged in the mounting groove 9, and a roller 102 is rotatably arranged on the mounting seat 101, and the rotation direction of the roller 102 is parallel to the axial direction of the ring body 1. When the gas is introduced into the mounting groove 9, the mounting seat 101 slides in the mounting groove 9 under the push of the airflow, and the roller 102 slides with the mounting seat 101 to fit with the inner wall of the winding core. Since the rotation direction of the roller 102 is parallel to the axial direction of the ring body 1, the winding core can be smoothly extracted along the axial direction of the ring body 1; since the rotation direction of the roller 102 is parallel to the axial direction of the ring body 1, when the winding core rotates circumferentially with the slip ring, even if part of the roller 102 expands outward, it will not affect the tight embrace of the slip ring and the winding core.

[0041] Reference Figure 2 and Figure 3A first limiting plate 15 is fixed to the inner wall of the notch portion of the mounting groove 9, and a second limiting plate 16 is integrally formed on the mounting seat 101. The sliding range of the mounting seat 101 is limited by the cooperation of the first limiting plate 15 and the second limiting plate 16. The second limiting plate 16 slides along with the sliding of the mounting seat 101 in the mounting groove 9. When the second limiting plate 16 slides to abut against the first limiting plate 15, the sliding of the second limiting plate 16 is restricted, and the sliding of the mounting seat 101 is therefore also restricted, thereby preventing the mounting seat 101 from detaching from the mounting groove 9, thereby preventing the mounting seat 101 from being pushed out of the mounting groove 9 by the airflow at the moment when the winding core detaches from the slip ring.

[0042] Reference Figure 2 and Figure 3 , a matching hole 11 connected to the first vent hole 2 is provided in the ring body 1, and a one-way air valve 13 is installed in the matching hole, so that gas can flow from the first vent hole 2 to the matching hole 11 through the one-way air valve 13. A push plate 12 is integrally formed on the mounting seat 101, and the side of the push plate 12 close to the winding core is opposite to the matching hole 11; the second vent hole 8 is connected to two branch holes, one of which is opposite to the side of the push plate 12 away from the matching hole 11, and the other branch hole is opposite to the side of the second limit plate 16 away from the first limit plate 15. When the differential ring is in use, gas enters the first vent hole 2 and enters the piston hole 5, and the piston block 6 is pushed to move. In this process, part of the air flow enters the matching hole 11, thereby pushing the push plate 12 to maintain the trend of moving toward the drive shaft. The rolling part 10 and the push plate 12 have the same movement trend, thereby avoiding the rolling part 10 from fitting with the inner wall of the winding core when the differential ring is in operation, thereby affecting the clamping of the differential ring and the winding core.

[0043] Reference Figure 2 and Figure 3 A first spring 14 is fixed in the mounting groove 9, one end of the first spring 14 is fixed to the bottom wall of the mounting groove 9, and the other end is fixed to the bottom end of the mounting seat 101. When the rolling portion 10 slides outward and fits the inner wall of the winding core, the first spring 14 is in a twisted and deformed state. After the disassembly of the winding core is completed, the rolling portion 10 does not need to fit the inner wall of the winding core, and the ventilation to the second vent hole 8 is stopped. At this time, the rolling portion 10 will not be subjected to the outward pushing force. Under the action of the rebound of the first spring 14, the rolling portion 10 moves in the direction close to the drive shaft to reset. Therefore, when a new winding core is subsequently installed, the rolling portion 10 fits the inner wall of the new winding core, thereby affecting the clamping of the differential ring and the new winding core.

[0044] Reference Figure 1The outer surfaces of the multiple inclined blocks 3 are all provided with sleeve grooves 17, and the same elastic ring 18 is sleeved in the multiple sleeve grooves 17. When the differential ring is in use, the movement of the wedge-shaped base drives the multiple inclined blocks 3 to expand synchronously, and the differential ring then hugs the winding core. During this process, the elastic ring 18 is in a tensioned state. When the winding core needs to be disassembled, the ventilation to the first vent hole 2 is stopped. At this time, the rebound of the elastic ring 18 will drive the multiple inclined blocks 3 to move in the direction close to the drive shaft to a certain extent, thereby making the multiple inclined blocks 3 away from the inner wall of the winding core.

[0045] Reference Figure 2 and Figure 4 A guide rod 19 radially parallel to the ring body 1 is fixed in the ring body 1, and a first anti-slip plate 22 is integrally formed at the end of the guide rod 19. A guide groove 20 is provided at one end of the inclined block 3 away from the inclined wedge base 7, and a second anti-slip plate 23 is fixed to the inner wall of the notch of the guide groove 20. The end of the guide rod 19 and the first anti-slip plate 22 are slidably connected in the guide groove 20. When the inclined block 3 slides, the end of the guide rod 19 and the first anti-slip plate 22 are located in the guide groove 20 and slide, and the cooperation of the guide rod 19 and the guide groove 20 limits the sliding direction of the inclined block 3. When the first anti-slip plate 22 slides to abut against the second anti-slip plate 23, the first anti-slip plate 22 is restricted from sliding in the same direction, thereby preventing the guide rod 19 from disengaging from the guide groove 20.

[0046] Reference Figure 2 and Figure 4 A second spring 21 is sleeved on the guide rod 19, one end of the second spring 21 is fixed to the ring body 1, and the other end is fixed to the inclined block 3. When the multiple inclined blocks 3 are synchronously expanded, the second spring 21 is in a twisted and deformed state. When the entrainment and disassembly are required, the ventilation to the first vent hole 2 is stopped. At this time, the inclined block 3 will not be pushed outward. Under the action of the second spring 21 rebounding, the multiple inclined blocks 3 move in the direction close to the drive shaft.

[0047] The implementation principle of a closed dual-air-path differential slip ring in the embodiment of the present application is as follows: when the differential slip ring is in use, the ring body 1 is sleeved on the drive shaft, and the winding core is sleeved on the ring body 1, and high-pressure gas is introduced into the first air vent 2 through the drive shaft, and the high-pressure gas enters the piston hole 5 to drive the piston block 6 to move, and the movement of the piston block 6 drives the inclined wedge base 7 to move, and the inclined wedge base 7 further pushes the inclined block 3 to expand outward so that the friction part 4 of the inclined block 3 is pressed against the winding core, thereby making the differential slip ring and the winding core tightly embrace, so as to realize the rotation of the winding core; and the winding core needs to be disassembled When the air is ventilated to the first air hole 2, the air is passed into the second air hole 8, and the air enters the mounting groove 9 through the second air hole 8. Driven by the airflow, the mounting seat 101 slides in the mounting groove 9, and the roller 102 slides with the mounting seat 101 to fit with the inner wall of the core. Since the rotation direction of the roller 102 is parallel to the axial direction of the ring body 1, the core can be smoothly extracted along the axial direction of the ring body 1, thereby improving the convenience of the core disassembly process, avoiding the core from getting stuck, and thus reducing the burden of the core removal operation.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A closed dual-air path slip ring, characterized in that: The invention comprises a ring body (1), wherein the inner wall of the ring body (1) is provided with a first vent hole (2), the outer wall of the ring body (1) is provided with a plurality of inclined blocks (3) slidably arranged along the circumferential direction, the outer surface of the inclined block (3) is provided with a friction portion (4), the ring body (1) is provided with a piston hole (5) connected with the first vent hole (2), the piston block (6) is slidably arranged in the piston hole (5), one side of the piston hole (5) is in contact with an inclined wedge base (7), and the inclined surface of the inclined wedge base (7) is in contact with the inclined surface of the inclined block (3); the ring body (1) A second ventilation hole (8) is provided on the inner wall of the ring body (1); a mounting groove (9) is provided in the ring body (1), the mounting groove (9) is connected to the second ventilation hole (8), and a rolling portion (10) that can fit with the inner wall of the winding core is slidably provided in the mounting groove (9); a matching hole (11) connected to the first ventilation hole (2) is provided in the ring body (1), and a push plate (12) is provided on the rolling portion (10), and the push plate (12) is opposite to the matching hole (11) on one side close to the winding core, and opposite to the second ventilation hole (8) on the other side.

2. A closed dual-air path differential slip ring according to claim 1, characterized in that: The rolling portion (10) comprises a mounting seat (101) slidably arranged in the mounting groove (9), a roller (102) being rotatably arranged on the mounting seat (101), and a rotation direction of the roller (102) being parallel to the axial direction of the ring body (1).

3. The closed dual-air path differential slip ring according to claim 1, characterized in that: A one-way air valve (13) is installed in the mating part, and gas can flow from the first vent hole (2) to the mating hole (11) through the one-way air valve (13).

4. The closed dual-air path differential slip ring according to claim 1, characterized in that: A first spring (14) is arranged in the installation groove (9); one end of the first spring (14) is connected to the rolling portion (10), and the other end is connected to the installation groove (9).

5. The closed dual-air path differential slip ring according to claim 1, characterized in that: A first limiting plate (15) is arranged in the installation groove (9), and a second limiting plate (16) is arranged on the rolling portion (10), wherein the second limiting plate (16) abuts against the first limiting plate (15) to limit the sliding range of the second limiting plate (16).

6. The closed dual-air path differential slip ring according to claim 1, characterized in that: The outer surfaces of the plurality of inclined blocks (3) are each provided with a sleeve groove (17), and the same elastic ring (18) is sleeved in the plurality of sleeve grooves (17).

7. The closed dual-air path differential slip ring according to claim 6, characterized in that: A guide rod (19) radially parallel to the ring body (1) is arranged inside the ring body (1), and a guide groove (20) for the end of the guide rod (19) to slide is formed at one end of the inclined block (3) away from the inclined wedge base (7).

8. The closed dual-air path differential slip ring according to claim 7, characterized in that: A second spring (21) is sleeved on the guide rod (19); one end of the second spring (21) is connected to the ring body (1), and the other end is connected to the inclined block (3).

9. The closed dual-air path differential slip ring according to claim 8, characterized in that: One end of the guide rod (19) is fixedly connected to the ring body (1), and the other end is provided with a first anti-slip plate (22). A second anti-slip plate (23) is provided in the guide groove (20), and the second anti-slip plate (23) abuts against the first anti-slip plate (22) to limit the first anti-slip plate (22) from escaping from the guide groove (20).

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