Double-gas-path slip ring

Abstract

The utility model relates to a double-gas-path slip ring which comprises a slip piston seat and a friction disc, and the end face of the slip piston seat is attached to the end face of the friction disc. A slip frequency piston air channel and a slip frequency friction piece are arranged in the slip frequency piston seat, when air is introduced into the slip frequency piston air channel, the slip frequency friction piece has the trend of extending outwards in the axial direction of the slip frequency piston seat, and the slip frequency friction piece is used for being connected with the end face of the friction disc in an abutting mode; an expansion piston air channel and an expansion friction piece are arranged in the friction disc, when air is introduced into the expansion piston air channel, the expansion friction piece tends to extend outwards in the radial direction of the friction disc, and the expansion friction piece is used for being connected with a material rolling belt in an abutting mode; the slip frequency piston air passage and the expansion piston air passage are arranged independently; the problem that an existing slip ring cannot independently conduct slip and expansion control, and consequently winding is untidy is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of slip differential rings, in particular to a double-air-path slip differential ring. Background Art

[0002] The slitting machine (slitting machine) is a device that slits a roll of web material into multiple rolls of web tapes. It is widely used, and the slip shaft is usually used for the reel of the slitting machine, and is also used for the unwinding shaft in special occasions. The purpose is to use the principle of slipping of each slip ring on the slip shaft to manipulate the tension adjustment of the material in the rewinding process, so that multiple reels on the shaft can always be kept uniformly, neatly and with constant tension from the inner layer of the core to the outer layer of the core. The quality of the web material is guaranteed by maintaining appropriate tension on all reel tapes when the reel is running. The application of the slip shaft effectively improves the speed, rewinding accuracy and degree of automation of the slitting machine.

[0003] A single-air-path dual-friction differential slip ring with Chinese patent publication number CN 212581238 U comprises a sealing ring body, an inclined wedge ring body, a transverse ring and a retaining ring, one end of the retaining ring is embedded with the inner ring of the inclined wedge ring body, the inner ring of the retaining ring is fixedly installed with a fixed bearing, the outer ring of the inclined wedge ring body is provided with an inclined wedge groove, a long wedge block is slidably installed in the inclined wedge groove, an elastic ring is embedded on the outer wall of the long wedge block, one end of the inclined wedge ring body away from the retaining ring is in contact with the transverse ring, one end of the sealing ring body close to the transverse ring is provided with a plurality of first piston holes, a first piston body is slidably installed in the first piston hole, one end of the sealing ring body away from the transverse ring is provided with a second piston hole, a second piston body is slidably installed in the piston hole, the first piston hole is connected with the second piston hole through a connecting channel, the inner ring of the sealing ring body is provided with an air intake channel connected with an external air source, and the first piston holes are all connected with the air intake channel. This patent adopts a single air path to supply air. When inflating, adjacent sliding shovel rings are close to each other and abut against each other, and the bull's eye ball extends from the differential slip ring; when deflated, adjacent sliding shovel rings are no longer close to each other, and the bull's eye ball extends into the differential slip ring. This patent can only perform simultaneous differential slip or expansion, and cannot independently control differential slip and expansion. In actual use, it often causes the coil to be rolled unevenly, which is inconvenient to use. Utility Model Content

[0004] The utility model aims to provide a dual-air-path slip ring to solve the problem that the existing slip ring cannot independently perform slip and expansion control, resulting in uneven winding.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A dual-air-path differential slip ring comprises a differential slip piston seat and a friction disc, wherein the end surface of the differential slip piston seat is in contact with the end surface of the friction disc;

[0007] A differential piston airway and a differential friction member are provided in the differential piston seat. When air is ventilated to the differential piston airway, the differential friction member has a tendency to extend outward along the axial direction of the differential piston seat. The differential friction member is used to abut against the end surface of the friction plate.

[0008] The friction disc is provided with an expansion piston airway and an expansion friction piece. When air is ventilated to the expansion piston airway, the expansion friction piece tends to extend outwardly along the radial direction of the friction disc. The expansion friction piece is used to abut against the coiled material belt.

[0009] The slip piston air passage and the expansion piston air passage are arranged independently of each other.

[0010] According to the above technical scheme, the utility model sets the differential piston air channel and the expansion piston air channel independently, and the two air channels do not interfere with each other. When compressed air is introduced into the differential piston air channel, the differential friction part can be pushed to extend outward, so that the differential friction part and the end surface of the friction plate are tightly fitted together, and torque is generated by the friction force between the differential friction part and the friction plate, thereby driving the rotation of the friction plate; when compressed air is introduced into the expansion piston air channel, the expansion friction part is pushed by the compressed air, and the expansion friction part extends from the friction plate (equivalent to increasing the outer diameter of the friction plate), thereby achieving the purpose of tensioning the reel.

[0011] Furthermore, the number of the slip friction members is more than two, and each of the slip friction members can extend out of the slip piston seat and abut against the end surface of the friction plate.

[0012] According to the above technical solution, by setting the number of slip friction members to a plurality, when the slip friction members extend from the slip piston seat, the friction between the slip piston seat and the friction plate can be increased, thereby driving the rotation of the friction plate.

[0013] Furthermore, a side of the differential piston seat close to the friction disc is provided with a plurality of differential mounting holes, and the number of the differential mounting holes is the same as the number of the differential friction members;

[0014] Each of the slip friction parts is installed in one of the slip installation holes, and each of the slip installation holes is communicated with the slip piston air passage.

[0015] According to the above technical solution, a plurality of differential mounting holes are provided, and the differential mounting holes are used to install differential friction parts. By connecting the differential mounting holes with the differential piston air passages, the differential friction parts can be pushed out of the differential mounting holes by ventilating the differential piston air passages, so that the differential friction parts are in contact with the end faces of the friction plates. When the differential piston seat rotates, the differential friction parts placed in the differential piston seat drive the friction plates to rotate, thereby realizing synchronous rotation of the differential piston seat and the friction plates.

[0016] Furthermore, the number of the expansion friction members is more than two, and each of the expansion friction members can extend out of or retract into the friction disk.

[0017] According to the above technical solution, by providing a plurality of expansion friction members, the plurality of expansion friction members can increase the friction between the coiled material belts, and the expansion friction members can contact the coiled material belts when extending out of the friction disks, thereby facilitating the coiling of the coiled material belts.

[0018] Furthermore, a plurality of expansion mounting holes are formed on the circumferential surface of the friction disc, each of the expansion friction members is mounted in one of the expansion mounting holes, and each of the expansion mounting holes is communicated with the expansion piston air passage.

[0019] According to the above technical solution, a plurality of expansion mounting holes are provided, and the expansion mounting holes are used to install the expansion friction parts. The expansion friction parts can move in the expansion mounting holes. By introducing compressed air into the expansion mounting holes, the expansion friction parts can be pushed out of the expansion mounting holes.

[0020] Furthermore, the expansion friction member includes an expansion piston, a magnetic member and a limit member, the magnetic member is used to drive the expansion piston to retract into the friction disk, and the limit member is used to limit the expansion piston from separating from the friction disk.

[0021] According to the above technical solution, the magnetic suction parts have a magnetic force of mutual attraction. After compressed air is introduced, the expansion piston can extend from the tightening hole. When no compressed air is introduced, the magnetic suction parts can adsorb the expansion piston, thereby driving the expansion piston back to the inside of the expansion hole.

[0022] Furthermore, the magnetic attraction component includes a first reset magnetic attraction plate and a second reset magnetic attraction plate, the first reset magnetic attraction plate is installed at the bottom of the expansion mounting hole, and the second reset magnetic attraction plate is installed on the expansion piston, and the first reset magnetic attraction plate and the second reset magnetic attraction plate have a tendency to attract each other.

[0023] According to the above technical solution, the first reset magnetic sheet and the second reset magnetic sheet both have magnetic forces that attract each other. By installing the first reset magnetic sheet at the bottom of the expansion mounting hole and the second reset magnetic sheet on the expansion piston, the first reset magnetic sheet can drive the second reset magnetic sheet installed on the expansion piston to attract each other, and when no compressed air is introduced, the expansion piston can be driven to retract until the expansion piston returns to the expansion mounting hole.

[0024] Furthermore, the limiting member includes a limiting strip and two locking screws, the two locking screws are respectively located on both sides of the expansion piston, the limiting strip is arranged between the two locking screws, and both ends of the limiting strip are respectively fixed to the locking screws.

[0025] According to the above technical solution, by setting a limit strip and a locking screw, the locking screw fixes the two ends of the limit strip, and at the same time the limit strip is used to limit the expansion piston to prevent the expansion piston from being pushed out of the friction plate by compressed air and to prevent the expansion piston from falling off.

[0026] Furthermore, it also includes a sealing ring, which is used to separate the expansion piston airway and the sliding piston airway.

[0027] According to the above technical solution, the sealing ring is used to separate the expansion piston airway and the sliding piston airway so that the two do not affect each other and there is no gas leakage in the expansion and sliding airways.

[0028] Furthermore, a bearing is included, and the bearing is installed on the friction disk to support the friction disk.

[0029] According to the above technical solution, the bearing is the basis for supporting the rotation of the friction disk and the friction force generated by the slip piston and the friction disk.

[0030] Beneficial effects of the utility model:

[0031] When compressed air is introduced into the air passage of the differential piston, the utility model can push the differential friction part to extend outward, so that the differential friction part and the end face of the friction plate are closely fitted together, and torque is generated by the friction force between the differential friction part and the friction plate, thereby driving the rotation of the friction plate; when compressed air is introduced into the air passage of the expansion piston, the expansion friction part is pushed by the compressed air, and the expansion friction part extends from the friction plate (equivalent to increasing the outer diameter of the friction plate), thereby achieving the purpose of tensioning and winding the winding strip; by independently arranging the differential piston air passage and the expansion piston air passage, the two air passages do not interfere with each other, and can independently control the slip and expansion, and the differential piston seat will not be unable to slip after the expansion piston is expanded; there will also be no situation where the differential piston can work normally but the winding strip is not expanded, thereby avoiding the problem of uneven winding caused by insufficient winding tension. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the state in which the slip friction member and the expansion friction member of the dual-air-path slip differential ring of the utility model are retracted;

[0033] Figure 2 It is a schematic diagram of the state in which the slip friction member and the expansion friction member of the dual-air-path slip differential ring of the utility model are extended;

[0034] Figure 3 This is a schematic diagram of the structure of the dual-air-path differential slip ring of the utility model, which does not include differential slip friction parts and expansion friction parts;

[0035] Figure 4 The utility model is a dual gas path slip ring Figure 2Schematic diagram of the state structure of part B;

[0036] Figure 5 It is an axonometric diagram of the dual gas path slip ring of the utility model;

[0037] Figure 6 The utility model is a dual gas path slip ring Figure 5 Schematic diagram of the enlarged structure of part A.

[0038] Among them, the differential piston seat 1, the friction disc 2, the differential piston airway 3, the differential friction part 4, the expansion piston airway 5, the expansion friction part 6, the expansion piston 601, the magnetic part 602, the first reset magnetic plate 6021, the second reset magnetic plate 6022, the limit part 603, the limit strip 6031, the locking screw 6032, the differential mounting hole 7, the expansion mounting hole 8, the sealing ring 9, the O-ring 901, the star-shaped sealing ring 902, and the bearing 10. DETAILED DESCRIPTION

[0039] The following will describe the implementation of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0040] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0041] It should be noted that in the prior art, existing narrow differential rings all adopt a single air path structure. Even if some differential rings adopt a dual air path structure, the narrowest ring width must be greater than or equal to 22mm. This embodiment proposes a dual air path differential ring. The differential ring includes but is not limited to a narrow differential ring, and can also be a ball differential ring, a key differential ring, an east-extending differential ring, etc.; the dual air path differential ring of the utility model has a narrowest ring width of 15mm, and has the advantages of compact structure, light weight, small space occupation, and easy maintenance. Of course, it is understandable that the ring width of the dual air path differential ring can be adaptively adjusted according to specific actual production needs, the type of differential shaft, etc.; such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, it includes a differential piston seat 1, a friction disc 2 and a bearing 10. The friction disc 2 is installed on the bearing 10. The bearing 10 is used to support the friction disc 2. The bearing 10 is the basis for supporting the rotation of the friction disc 2 and contacting with the differential piston seat 1 to generate friction force. Among them, the end face of the differential piston seat 1 fits with the end face of the friction disc 2. The differential piston seat 1 is provided with a differential piston airway 3 and a differential friction member 4. The utility model preferably uses a differential piston as the differential friction member 4. When the differential piston airway 3 is ventilated, the differential friction member 4 has a tendency to extend outward along the axial direction of the differential piston seat 1. The differential friction member 4 is used to abut against the end face of the friction disc 2.

[0042] An expansion piston airway 5 and an expansion friction member 6 are provided in the friction disc 2. When air is ventilated to the expansion piston airway 5, the expansion friction member 6 tends to extend radially outwardly in the friction disc 2. The expansion friction member 6 is used to abut against the coiled material belt; wherein the slip piston airway 3 and the expansion piston airway 5 are independently provided.

[0043] When the utility model introduces compressed air into the differential piston airway 3, the differential friction member 4 can be pushed outward, so that the differential friction member 4 and the end surface of the friction disc 2 are closely attached together, and the differential friction member 4 and the friction disc 2 are combined together by the friction force between them, thereby driving the friction disc 2 to rotate synchronously; when compressed air is introduced into the expansion piston airway 5, the expansion friction member 6 is pushed by the compressed air, and the expansion friction member 6 extends from the friction disc 2 (equivalent to increasing the outer diameter of the friction disc 2), thereby achieving the purpose of tensioning and winding the coiled material belt. By setting the differential piston airway 3 and the expansion piston airway 5 independently from each other, the two airways do not interfere with each other, and the differential slip and expansion can be controlled independently, and the differential slip piston seat 1 will not be unable to slip after the expansion piston 601 is expanded; nor will the differential slip piston be able to work normally, but the coiled material belt is not expanded, thereby avoiding the problem of uneven winding caused by insufficient winding tension.

[0044] As a preferred embodiment, Figure 3As shown, a plurality of differential mounting holes 7 are provided on one side of the differential piston seat 1 close to the friction disc 2, and the number of the differential mounting holes 7 is the same as the number of the differential friction members 4; the differential friction members 4 are respectively installed in the differential mounting holes 7, and the differential friction members 4 are sealed and slidably connected in the differential mounting holes 7, and the differential mounting holes 7 are all connected with the differential piston airway 3. The differential mounting holes 7 are used to install the differential friction members 4, and by connecting the differential mounting holes 7 with the differential piston airway 3, the differential friction members 4 can be pushed out of the differential mounting holes 7 by ventilating the differential piston airway 3, so that the differential friction members 4 contact the end surface of the friction disc 2, and when the differential piston seat 1 rotates, the differential friction members 4 placed in the differential piston seat 1 abut against the friction disc 2, thereby driving the friction disc 2 to rotate, that is, realizing the synchronous rotation of the differential piston seat 1 and the friction disc 2. As a preferred embodiment, the number of the differential friction members 4 is more than two, and each of the differential friction members 4 can extend out of the differential piston seat 1 and abut against the end surface of the friction disc 2. By setting the number of slip friction members 4 to be multiple, when the slip friction member 4 extends from the slip piston seat 1, the friction between the slip piston seat 1 and the friction plate 2 can be increased, and the friction force during contact can be increased, thereby better driving the friction plate 2 to rotate.

[0045] like Figure 3 As shown, the circumferential surface of the friction disc 2 is provided with a plurality of expansion mounting holes 8, and the expansion friction members 6 are respectively installed in the expansion mounting holes 8, and the expansion mounting holes 8 are all connected with the expansion piston airway 5. By setting a plurality of expansion mounting holes 8, the expansion mounting holes 8 are used to install the expansion friction members 6, and the expansion friction members 6 can move in the expansion mounting holes 8. By introducing compressed air into the expansion mounting holes 8, the expansion friction members 6 can be pushed out of the expansion mounting holes 8. The number of the expansion friction members 6 is more than two, and each expansion friction member 6 can extend or retract into the friction disc 2. By setting a plurality of expansion friction members 6, the plurality of expansion friction members 6 can increase the friction between the coiling belt, and the expansion friction members 6 can contact the coiling belt when extending out of the friction disc 2, so as to facilitate the coiling or unwinding of the coiling belt.

[0046] As a preferred embodiment, Figure 1 and Figure 4 As shown, the expansion friction member 6 includes an expansion piston 601 , a magnetic member 602 and a limit member 603 . The magnetic member 602 is used to drive the expansion piston 601 to retract into the friction disc 2 , and the limit member 603 is used to limit the expansion piston 601 from leaving the friction disc 2 .

[0047] Furthermore, if Figure 4As shown, the magnetic member 602 includes a first reset magnetic sheet 6021 and a second reset magnetic sheet 6022. The first reset magnetic sheet 6021 is installed at the bottom of the expansion mounting hole 8, and the second reset magnetic sheet 6022 is installed on the expansion piston 601. The first reset magnetic sheet 6021 and the second reset magnetic sheet 6022 have a tendency to attract each other. The first reset magnetic sheet 6021 and the second reset magnetic sheet 6022 both have a magnetic force that attracts each other. By installing the first reset magnetic sheet 6021 at the bottom of the expansion mounting hole 8 and the second reset magnetic sheet 6022 on the expansion piston 601, the first reset magnetic sheet 6021 can drive the second reset magnetic sheet 6022 installed on the expansion piston 601 to attract each other. After compressed air is introduced, the expansion piston 601 can overcome the action force between the first reset magnetic sheet 6021 and the second reset magnetic sheet 6022, and the expansion piston 601 extends out from the expansion mounting hole 8; when no compressed air is introduced, the first reset magnetic sheet 6021 and the second reset magnetic sheet 6022 attract each other and can drive the expansion piston 601 to retract until the expansion piston 601 returns to the expansion mounting hole 8.

[0048] Among them, Figure 5 and Figure 6 As shown, the limiting member 603 includes a limiting strip 6031 and two locking screws 6032. The two locking screws 6032 are respectively located on both sides of the expansion piston 601. The limiting strip 6031 is arranged between the two locking screws 6032, and the two ends of the limiting strip 6031 are respectively fixed to the locking screws 6032. The locking screws 6032 play a role in fixing the two ends of the limiting strip 6031. At the same time, the limiting strip 6031 is used to limit the expansion piston 601, so as to prevent the expansion piston 601 from being pushed out of the friction disc 2 by the compressed air and to prevent the expansion piston 601 from falling off.

[0049] Furthermore, the utility model also includes a sealing ring 9, wherein the sealing ring 9 includes an O-ring 901 and a star-shaped sealing ring 902, wherein the O-ring 901 and the star-shaped sealing ring 902 are used to separate the expansion piston airway 5 and the sliding piston airway 3, so that the expansion piston airway 5 and the sliding piston airway 3 do not affect each other, so that there is no gas leakage in the air path during the expansion process and the sliding process.

[0050] During the implementation of the utility model, compressed air is introduced into the expansion piston airway 5, and the expansion piston 601 is extended under the drive of the compressed air. The expansion piston 601 is pushed by the compressed air, which is equivalent to increasing the outer diameter of the slip piston seat 1, thereby expanding the coiled belt, wherein the extension of the expansion piston 601 is limited by the limit strip 6031, and the two ends of the limit strip 6031 are fixed to the friction disk 2 by locking screws 6032, so the expansion piston 601 will not be pushed out of the expansion mounting hole 8 of the friction disk 2 by the compressed air; when there is no coiled belt to be wound, the compressed air is canceled from the expansion piston airway 5, and the expansion piston 601 retracts into the expansion mounting hole 8 under the tendency of the first reset magnetic suction plate 6021 and the second reset magnetic suction plate 6022 to attract each other.

[0051] Compressed air is introduced into the air passage 3 of the slip piston, and the slip piston is pushed by the compressed air, so that the end face of the slip piston and the end face of the friction plate 2 are pressure-fitted, and the rotation of the slip piston seat 1 drives the friction plate 2 to rotate synchronously; when the friction plate 2 is subjected to an external torque and the externally applied torque is greater than the torque generated by the friction force between the slip piston and the friction plate 2, slipping occurs, thereby realizing the slip function.

[0052] When compressed air is introduced into the differential piston airway 3, the differential friction member 4 can be pushed outward, so that the differential friction member 4 and the end surface of the friction plate 2 are closely fitted together, and torque is generated by the friction force between the differential friction member 4 and the friction plate 2, thereby driving the rotation of the friction plate 2; when compressed air is introduced into the expansion piston airway 5, the expansion friction member 6 is pushed by the compressed air, and the expansion friction member 6 extends from the friction plate 2 (equivalent to increasing the outer diameter of the friction plate 2), thereby achieving the purpose of tensioning the winding material belt; by setting In the form of dual air channels, the slip piston air channel 3 and the expansion piston air channel 5 are independently set, and the two air channels do not interfere with each other, so that slip and expansion can be independently controlled. There will be no situation where the slip piston seat 1 cannot slip after the expansion piston 601 is expanded; there will be no situation where the slip piston can work normally but the coil belt is not expanded. At the same time, the dual air channel slip ring can provide more stable tension than the traditional single air channel slip ring, and the wound coil belt is more neat, avoiding the problem of uneven winding due to insufficient winding tension. The structure is compact and practical.

[0053] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A dual air path differential ring, characterized in that: include: A differential piston seat (1) and a friction plate (2), wherein the end surface of the differential piston seat (1) is in contact with the end surface of the friction plate (2); The differential piston seat (1) is provided with a differential piston airway (3) and a differential friction member (4). When air is ventilated to the differential piston airway (3), the differential friction member (4) has a tendency to extend outwardly along the axial direction of the differential piston seat (1). The differential friction member (4) is used to abut against the end surface of the friction plate (2); The friction disc (2) is provided with an expansion piston airway (5) and an expansion friction member (6). When air is ventilated to the expansion piston airway (5), the expansion friction member (6) has a tendency to extend outwardly in the radial direction of the friction disc (2). The expansion friction member (6) is used to be arranged in contact with the coiled material belt. The slip piston air passage (3) and the expansion piston air passage (5) are arranged independently of each other.

2. The dual gas path slip ring according to claim 1, characterized in that: The number of the slip friction parts (4) is more than two, and each of the slip friction parts (4) can extend out of the slip piston seat (1) and abut against the end surface of the friction plate (2).

3. The dual gas path slip ring according to claim 2, characterized in that: A plurality of differential mounting holes (7) are provided on one side of the differential piston seat (1) close to the friction disc (2), and the number of the differential mounting holes (7) is the same as the number of the differential friction member (4); Each of the slip friction parts (4) is installed in one of the slip installation holes (7), and each of the slip installation holes (7) is connected to the slip piston air passage (3).

4. The dual gas path slip differential ring according to claim 1, characterized in that: The number of the expansion friction parts (6) is more than two, and each of the expansion friction parts (6) can extend out of or retract into the friction disc (2).

5. The dual gas path differential slip ring according to claim 4, characterized in that: The circumferential surface of the friction disc (2) is provided with a plurality of expansion mounting holes (8), each of the expansion friction parts (6) is mounted in one of the expansion mounting holes (8), and each of the expansion mounting holes (8) is connected to the expansion piston air passage (5).

6. The dual gas path differential slip ring according to claim 5, characterized in that: The expansion friction member (6) comprises an expansion piston (601), a magnetic member (602) and a limiting member (603), wherein the magnetic member (602) is used to drive the expansion piston (601) to retract into the friction disk (2), and the limiting member (603) is used to limit the expansion piston (601) from being separated from the friction disk (2).

7. The dual gas path differential slip ring according to claim 6, characterized in that: The magnetic attraction component (602) includes a first reset magnetic attraction piece (6021) and a second reset magnetic attraction piece (6022), wherein the first reset magnetic attraction piece (6021) is installed at the bottom of the expansion mounting hole (8), and the second reset magnetic attraction piece (6022) is installed on the expansion piston (601), and the first reset magnetic attraction piece (6021) and the second reset magnetic attraction piece (6022) have a tendency to attract each other.

8. The dual gas path differential slip ring according to claim 6, characterized in that: The limiting member (603) comprises a limiting strip (6031) and two locking screws (6032), wherein the two locking screws (6032) are respectively located on both sides of the expansion piston (601), the limiting strip (6031) is arranged between the two locking screws (6032), and the two ends of the limiting strip (6031) are respectively fixed to the locking screws (6032).

9. The dual gas path slip ring according to claim 1, characterized in that: It also comprises a sealing ring (9), wherein the sealing ring (9) is used to separate the expansion piston air passage (5) and the slip piston air passage (3).

10. The dual gas path differential slip ring according to claim 1, characterized in that: It also comprises a bearing (10), wherein the bearing (10) is mounted on the friction disc (2) and is used to support the friction disc (2).

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