A life-doubling conductive slip ring structure

Abstract

The utility model relates to conductive slip ring technical field especially a kind of conductive slip ring structure of life multiplication, including rotor assembly, stator assembly, stator frame and multiple bearings, the rotor assembly includes shaft, conductive copper ring and insulating spacer ring, it is characterized by:the conductive slip ring structure further includes brush compensation mechanism;The stator assembly includes support frame and the same structure first brush assembly and second brush assembly;The first brush assembly includes terminal block and multiple groups of brush wire on terminal block;The support frame and stator frame are rotatably arranged on the outside of shaft by bearing;Second brush assembly is fixedly connected with support frame, and its brush wire is in sliding contact with conductive copper ring;The first brush assembly is movably connected with support frame, and its brush wire is located on the outside of conductive copper ring;The brush compensation mechanism is connected with first brush assembly, and the utility model can realize the multiple extension of the working life of conductive slip ring.

Description

Technical Field

[0001] This utility model relates to the field of conductive slip ring technology, specifically to a conductive slip ring structure with a lifespan multiplication function. Background Technology

[0002] Conductive slip rings are crucial components in modern industry for transmitting energy and data via rotary connections, and their lifespan and reliability directly impact the performance of the entire system. Currently, the lifespan of conductive slip rings is primarily limited by the wear of the friction pair formed by its core component—the brush—and the slip ring itself. When the brush is worn out or contact fails, the entire slip ring reaches the end of its lifespan.

[0003] In existing technologies, the lifespan of slip rings can be increased to the tens of millions of revolutions by improving the friction pair materials (such as using gold-gold contacts, fiber brushes, etc.). However, in applications such as aerospace and deep space exploration, slip rings are often required to have an ultra-long lifespan of hundreds of millions or even billions of revolutions, which the existing single friction pair structures cannot meet. Therefore, there is an urgent need for a practical solution that can fundamentally overcome the lifespan limitations through structural design. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a conductive slip ring structure with a life-multiplying function, which can achieve a multiple extension of the working life of the conductive slip ring.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a life-multiplying conductive slip ring structure, comprising a rotor assembly, a stator assembly, a stator frame, and multiple bearings. The rotor assembly includes a rotating shaft, a conductive copper ring, and an insulating spacer ring. The conductive slip ring structure further includes a brush compensation mechanism. The stator assembly includes a support frame, and a first brush assembly and a second brush assembly with identical structures. The first brush assembly includes a terminal block and multiple sets of brush filaments disposed on the terminal block. The support frame and the stator frame are rotatably disposed on the outside of the rotating shaft via bearings. The second brush assembly is fixedly connected to the support frame, and its brush filaments slide in contact with the conductive copper ring. The first brush assembly is movably connected to the support frame, and its brush filaments are located outside the conductive copper ring. The brush compensation mechanism is connected to the first brush assembly and is used to release the first brush assembly upon receiving a trigger signal, causing its brush filaments to slide in contact with the conductive copper ring, thereby replacing the conductive function of the second brush assembly.

[0006] Preferably, the brush compensation mechanism includes a release component and a reset component; the release component is mounted on the stator frame, and the actuating end of the release component is fixedly connected to the terminal block of the first brush component, for locking the position of the first brush component in the initial state; the reset component is located between the first brush component and the support frame, for providing the first brush component with a driving force to the rotor component so that the brush filaments of the first brush component contact the conductive copper ring after the release component is unlocked.

[0007] Preferably, the release component includes: A slotted bolt has an annular slot on its threaded shaft, and one end of the slotted bolt is fixedly connected to the terminal block of the first brush assembly; A shape memory metal tube is fitted onto the threaded rod of the slotted bolt; A heater is located on the outer periphery of the shape memory metal tube, which causes the shape memory metal tube to expand when heated and break the thread of the slotted bolt.

[0008] Preferably, the release assembly further includes a housing, an end cap, a lock nut, and a washer; the housing is a cylindrical structure closed at one end, and the housing is fixed to the stator frame by bolts; the end cap is fixed to the port of the housing; the end cap has a cavity inside, and a cover hole coaxial with the bottom hole is opened on the inner wall of the cavity; the slotted bolt consists of a screw and a connector, the outer diameter of the connector being larger than the inner diameter of the bottom hole; the end of the screw of the slotted bolt away from the connector extends through the cover hole into the cavity, and the lock nut is sleeved on the screw and located in the cavity, abutting against the inner wall of the cavity; the connector abuts against the bottom end of the housing and is fixed to the terminal block of the first brush assembly; the lower end of the memory metal tube abuts against the bottom wall of the housing; the washer abuts between the memory metal tube and the end cap.

[0009] Preferably, the reset assembly includes a guide rod and a reset spring; the terminal block of the first brush assembly is slidably mounted on the support frame via the guide rod, and the sliding direction of the first brush assembly is the same as the radial direction of the rotating shaft; one end of the reset spring is fixedly connected to the terminal block of the first brush assembly, and the other end is fixedly connected to the support frame.

[0010] Preferably, the preload of the reset spring is greater than the sum of the sliding friction between the terminal block and the guide rod of the first brush assembly and the elastic reaction force after the brush bristles of the first brush assembly come into contact with the conductive copper ring.

[0011] Preferably, it also includes a controller, which is electrically connected to the heater.

[0012] Preferably, the first brush assembly and the brush compensation mechanism are correspondingly arranged and there are multiple sets; the multiple sets of the first brush assembly and the brush compensation mechanism are distributed around the axis of rotation.

[0013] Preferably, the stator frame includes a left flange, a right flange, and a fixed seat; the left and right flanges are rotatably mounted on the outside of the rotating shaft via bearings; the fixed seat is fixedly mounted on the left and right flanges; and the release assembly is mounted on the fixed seat.

[0014] Preferably, the release assembly further includes a connecting flange and a lock nut threaded onto the slotted bolt thread; one end of the memory metal tube abuts against the outer shell, and the other end abuts against the connecting flange.

[0015] Compared with existing technologies, the advantages of this invention are as follows: By setting a redundant first brush assembly in a non-working state and automatically switching it to the working state through a trigger mechanism after the main brush assembly reaches the end of its lifespan, the working life of the conductive slip ring is extended several times, significantly reducing equipment downtime maintenance time and replacement costs; the switching mechanism, which combines a mechanical release assembly driven by a shape memory metal tube and a spring reset assembly, is reliable and responsive, ensuring the stability of the brush switching process and the continuity of the conductive connection, thus avoiding signal interruption; the structure adopts a modular design, allowing multiple redundant brush groups to be set and sequentially controlled by a unified controller, enabling multiple relays and further greatly extending the overall service life; at the same time, the structure is compact, easy to integrate into existing equipment, highly practical, and has good economic benefits and application prospects. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the radial cross-section of the conductive slip ring of this utility model; Figure 2 This is a schematic diagram of the overall structure of the conductive slip ring of this utility model; Figure 3 This is a schematic diagram of the support frame structure of this utility model; Figure 4 For the present utility model Figure 1 Schematic diagram of the structure at point A; Figure 5 This is a schematic diagram of the brush compensation mechanism of this utility model.

[0017] In the diagram: 1. Rotor assembly, 11. Shaft, 12. Conductive copper ring, 13. Insulating spacer ring; 2 stator assembly, 21 support frame, 22 first brush assembly, 23 second brush assembly, 211 retaining ring, 212 connecting rod, 221 terminal block, 222 brush filaments, 223 stator lead wire; 3 First bearing, 4 Second bearing, 5 Left flange, 6 Right flange; 7 Release assembly, 71 Grooved bolt, 72 Memory metal tube, 73 Heater, 74 Housing, 75 End cap, 76 Locking nut, 77 Connecting bracket, 78 Washer; 8. Reset assembly, 81. Guide rod, 82. Reset spring, 83. Upper pin, 84. Lower pin; 9. Fixing base. Detailed Implementation

[0018] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly understand how to practice this utility model. Although this utility model has been described in conjunction with its preferred embodiments, these embodiments are merely illustrative and not intended to limit the scope of this utility model.

[0019] See Figure 1-5 In one embodiment of this utility model, a life-extending conductive slip ring structure includes: a rotor assembly 1, a stator assembly 2, a first bearing 3, a second bearing 4, a left flange 5, a right flange 6, and a brush compensation mechanism. This conductive slip ring structure, through a relay-style redundant brush design and an intelligent trigger switching mechanism, can significantly extend the service life of the conductive slip ring.

[0020] The rotor assembly 1 includes a rotating shaft 11, a plurality of conductive copper rings 12 and a plurality of insulating spacers 13 fixedly sleeved on the rotating shaft 11, wherein the conductive copper rings 12 and the insulating spacers 13 are arranged alternately; the rotor assembly 1 also includes a plurality of wires, which are respectively connected to each conductive copper ring 12.

[0021] The stator assembly 2, left flange 5, and right flange 6 are rotatably mounted on the outside of the rotating shaft 11 via the first bearing 3 and the second bearing 4. The stator assembly 2 is located between the left flange 5 and the right flange 6, enabling the rotor assembly 1 to rotate around the shaft relative to the stator assembly 2, left flange 5, and right flange 6. The left flange 5 and the right flange 6 form the stator frame. The stator assembly 2 includes a support frame 21, a first brush assembly 22, and a second brush assembly 23. The support frame 21 consists of two annular fixed rings 211 and four connecting rods 212 fixedly connected between the two fixed rings 211, making the support frame 21 a hollow frame structure. The support frame 21 is rotatably disposed on the outside of the rotating shaft 11 via the first bearing 3 and the second bearing 4 and corresponds to the positions of the conductive copper ring 12 and the insulating spacer ring 13. The first brush assembly 22 and the second brush assembly 23 have the same structure and are both mounted on the support frame 21 around an axis. Taking the first brush assembly 22 as an example, the first brush assembly 22 includes a terminal block 221, multiple sets of brush filaments 222 disposed on the terminal block 221, and multiple sets of stator leads 223 corresponding to and connected to the brush filaments 222. In the initial state, the second brush assembly 23 is fixedly connected to the support frame 21. At this time, the terminal block of the second brush assembly 23 is fixedly connected to the corresponding connecting rod 212 by screws, and the terminal block of the second brush assembly 23 and the connecting rod 212 are in surface contact. The brush bristles of the second brush assembly 23 are in sliding contact with the conductive copper ring 12 at the corresponding position on the rotating shaft 11 to realize the basic function of the conductive slip ring. The first brush assembly 22 is movably connected to the support frame 21. At this time, the brush bristles 222 of the first brush assembly 22 are in a non-contact state with the conductive copper ring 12.

[0022] The brush compensation mechanism is correspondingly provided with the first brush assembly 22 and is used to control the first brush assembly 22 to change from a non-contact state to a contact state after the friction life of the second brush assembly 23 ends (brush bristles break or contact is unstable), so as to achieve the purpose of relay conduction. The brush compensation mechanism includes a release component 7, a reset component 8, and a fixing base 9. The release component 7 is located on the outside of the first brush component 22 and fixedly connected to it via the fixing base 9. The reset component 8 is located between the first brush component 22 and the support frame 21.

[0023] Specifically, the fixing seat 9 is fixedly mounted on the left flange 5 and the right flange 6 by screws, on the outside of the first brush assembly 22; the fixing seat 9 has a through hole radially along the rotating shaft 11.

[0024] The release assembly 7 includes a slotted bolt 71, a shape memory metal tube 72, a heater 73, a housing 74, an end cap 75, a lock nut 76, a connecting bracket 77, and a gasket 78. The outer shell 74 is a cylindrical structure closed at one end. The outer shell 74 is fixed to the fixing base 9 by bolts, and the bottom end of the outer shell 74 is in surface contact with the fixing base 9. A bottom hole is opened on the bottom wall of the outer shell 74, which coincides with the position of the through hole and is coaxial. The end cap 75 is fixed on the port of the outer shell 74. The end cap 75 has a cavity inside, and a cover hole coaxial with the bottom hole is opened on the inner wall of the cavity. The slotted bolt 71 consists of a screw and a connector, the outer diameter of which is larger than the inner diameter of the bottom hole. The slotted bolt 71 is located inside the housing 74. The end of the screw away from the connector extends through the bottom hole and the cover hole into the cavity. The anti-loosening nut 76 is threaded onto the screw and located inside the cavity, abutting against the inner wall of the cavity. An annular slot is formed on the outer circumference of the screw. The connector is located outside the housing 74 and abuts against the bottom end of the housing 74. In this way, the slotted bolt 71 maintains initial stability. The memory metal tube 72 is located inside the outer shell 74 and is slidably sleeved on the screw. The lower end of the memory metal tube 72 abuts against the bottom wall of the outer shell 74. The gasket 78 is sleeved on the screw. The upper end of the gasket 78 abuts against the end cap 75, and the lower end abuts against the upper end of the memory metal tube 72. The heater 73 is sleeved on the outer periphery of the memory metal tube 72, and the heater 73 is connected to the power supply and controller of the external device through a circuit. The connector is fixed to the terminal block 221 through the connecting bracket 77. The memory metal tube 72 maintains its original length at room temperature. The slotted bolt 71 bears the pre-tension stress of the reset assembly 8 to maintain the stability of the overall structure.

[0025] When the controller detects that the second brush assembly has reached the end of its lifespan (e.g., determined by contact resistance), it sends a command to the heater 73 to heat the memory metal tube 72, causing it to expand axially and generate thrust to push the cavity of the end cap 75 inward. When the driving force exceeds the breaking load of the slotted bolt, the slotted bolt breaks from the annular groove, the screw separates from the connector, and the mechanical constraint on the terminal block 221 is released. Subsequently, under the action of the reset component 8, the terminal block drives the brush filaments radially closer to the shaft until they make sliding contact with the corresponding conductive copper ring.

[0026] In this embodiment, the controller can not only send heating commands to the heater 73, but also monitor the status of the second brush assembly 23 (e.g., by monitoring the contact resistance) to determine the end of the lifespan of the second brush assembly 23, thereby achieving more intelligent relay conduction.

[0027] As can be seen from the above, after the release component 7 takes effect, the reset component 8 is required to reset the first brush assembly 22. The reset component 8 needs to apply a pulling force to the first brush assembly 22. The reset component 8 includes a guide rod 81, a reset spring 82, an upper pin 83, and a lower pin 84. Multiple guide rods 81, reset springs 82, upper pins 83, and lower pins 84 are provided. The terminal block 221 is slidably mounted on the connecting rod 212 via the guide rod 81, and the sliding direction of the terminal block 221 is the same as the radial direction of the rotating shaft 11. The upper pin 83 is fixedly mounted on the terminal block 221, while the lower pin 84 is fixedly mounted on the connecting rod 212. The upper pin 83 and the lower pin 84 are connected by the reset spring 82. In the initial state, the reset spring is in a stretched state, and its tension is much less than the breaking strength of the slotted bolt, but greater than the sum of the friction between the terminal block and the guide rod and the elastic reaction force after the brush bristles contact the conductive ring. After the release action is completed, the return spring continues to provide appropriate tension to ensure that the terminal block and the connecting rod maintain surface contact and that the brush bristles maintain stable contact force with the conductive copper ring. In the initial state, the return spring 82 is in a stretched state. At the same time, the tension of the return spring 82 is much less than the breaking strength of the slotted bolt, but greater than the sum of the friction between the terminal block and the guide rod and the elastic reaction force after the brush bristles contact the conductive ring. In addition, after the release component 7 plays its role and the release action is completed, the terminal block 221 maintains surface contact with the corresponding connecting rod 212 under the action of the return spring 82 continuing to provide appropriate tension, so as to smoothly take over the initial state of the second brush assembly 23. At the same time, after the return spring 82 pulls the terminal block 221 to reset, it continues to maintain a stretched state to provide a stable tension for the brush bristles 222 to contact the conductive copper ring. In the preferred embodiment, multiple sets of first brush assemblies and corresponding brush compensation mechanisms can be set to form multi-level redundancy. The release component (7) is centrally controlled by the same controller and can be triggered sequentially to realize step-by-step relay conduction. In a preferred embodiment, the first brush assembly 22 exists as a relay type, and multiple sets can be set. Correspondingly, multiple sets of brush compensation mechanisms can also be set to form multi-level redundancy. In order to achieve relay, the release component 7 needs to be centrally controlled by the same controller. The controller can control multiple sets of first brush assemblies 22 to be triggered one by one in sequence to achieve relay conduction.

[0028] In one embodiment, the release assembly 7 may further include a connecting flange and a lock nut threaded onto the grooving bolt 71. One end of the memory metal tube 72 abuts against the outer shell, and the other end abuts against the connecting flange. When the memory metal tube 72 expands due to heat, it can push the connecting flange to break the grooving bolt 71.

[0029] This technical solution extends the service life of the conductive slip ring by several times by setting up a redundant first brush assembly in a non-working state and automatically switching it to the working state through an intelligent triggering mechanism after the main brush assembly reaches the end of its lifespan. This significantly reduces equipment downtime, maintenance time, and replacement costs. The switching mechanism, combining a mechanical release assembly driven by a shape memory metal tube and a spring reset assembly, is reliable and responsive, ensuring the stability of the brush switching process and the continuity of the conductive connection, thus avoiding signal interruption. The modular design allows for multiple redundant brush groups to be set up and sequentially controlled by a unified controller, enabling multiple relays and further extending the overall service life. Furthermore, the compact structure is easy to integrate into existing equipment, making it highly practical and offering significant economic benefits and promising application prospects.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A life-multiplying conductive slip ring structure, comprising a rotor assembly (1), a stator assembly (2), a stator frame, and multiple bearings, wherein the rotor assembly (1) comprises a rotating shaft (11), a conductive copper ring, and an insulating spacer ring, characterized in that: The conductive slip ring structure also includes a brush compensation mechanism; the stator assembly (2) includes a support frame (21), and a first brush assembly (22) and a second brush assembly (23) with the same structure; the first brush assembly (22) includes a terminal block and multiple sets of brush filaments disposed on the terminal block; the support frame (21) and the stator frame are rotatably disposed on the outside of the rotating shaft (11) via bearings; the second brush assembly (23) is fixedly connected to the support frame (21) and its brush filaments slide in contact with the conductive copper ring (12); the first brush assembly (22) is movably connected to the support frame (21) and its brush filaments are located on the outside of the conductive copper ring (12); the brush compensation mechanism is connected to the first brush assembly (22) and is used to release the first brush assembly (22) after receiving a trigger signal, so that its brush filaments slide in contact with the conductive copper ring (12) to take over the conductive function of the second brush assembly (23).

2. The conductive slip ring structure with life-multiplying capability according to claim 1, characterized in that: The brush compensation mechanism includes a release component (7) and a reset component (8); the release component (7) is mounted on the stator frame, and the execution end of the release component (7) is fixedly connected to the terminal block of the first brush assembly (22) for locking the position of the first brush assembly (22) in the initial state; the reset component (8) is located between the first brush assembly (22) and the support frame (21) for providing the first brush assembly (22) with a driving force to the rotor assembly (1) to make the brush filaments of the first brush assembly (22) contact the conductive copper ring (12) after the release component (7) is unlocked.

3. The lifespan-multiplying conductive slip ring structure according to claim 2, characterized in that, The release component (7) includes: The slotted bolt (71) has an annular slot on its screw, and one end of the slotted bolt (71) is fixedly connected to the terminal block of the first brush assembly (22); A shape memory metal tube (72) is fitted onto the threaded rod of the slotted bolt (71); The heater (73) is located on the outer periphery of the memory metal tube (72) so that the memory metal tube (72) expands when heated and breaks the screw of the slotted bolt (71).

4. The life-multiplying conductive slip ring structure according to claim 3, characterized in that: The release assembly (7) also includes a housing, an end cap, a lock nut, and a washer; the housing is a cylindrical structure closed at one end, and the housing is fixed to the stator frame by bolts; the end cap is fixed to the port of the housing; the end cap has a cavity inside, and a cover hole coaxial with the bottom hole is opened on the inner wall of the cavity; the slotted bolt (71) consists of a screw and a connector, and the outer diameter of the connector is larger than the inner diameter of the bottom hole; the end of the screw of the slotted bolt (71) away from the connector extends through the cover hole into the cavity, and the lock nut is sleeved on the screw and located in the cavity and abuts against the inner wall of the cavity; the connector abuts against the bottom end of the housing and is fixed to the terminal block of the first brush assembly (22); the lower end of the memory metal tube abuts against the bottom wall of the housing; the washer abuts between the memory metal tube and the end cap.

5. The life-multiplying conductive slip ring structure according to claim 2, characterized in that: The reset assembly (8) includes a guide rod (81) and a reset spring (82); the terminal block of the first brush assembly (22) is slidably mounted on the support frame (21) via the guide rod (81), and the sliding direction of the first brush assembly (22) is the same as the radial direction of the rotating shaft (11); one end of the reset spring (82) is fixedly connected to the terminal block of the first brush assembly (22), and the other end is fixedly connected to the support frame (21).

6. The life-multiplying conductive slip ring structure according to claim 5, characterized in that: The preload of the reset spring (82) is greater than the sum of the sliding friction between the terminal block and the guide rod (81) of the first brush assembly (22) and the elastic reaction force after the brush bristles of the first brush assembly (22) come into contact with the conductive copper ring (12).

7. The life-multiplying conductive slip ring structure according to claim 3, characterized in that: It also includes a controller that is electrically connected to the heater (73).

8. The life-multiplying conductive slip ring structure according to claim 1, characterized in that: The first brush assembly (22) is provided with a brush compensation mechanism and there are multiple sets; the multiple sets of first brush assemblies (22) and brush compensation mechanisms are distributed around the axis of rotation (11).

9. The life-multiplying conductive slip ring structure according to claim 2, characterized in that: The stator frame includes a left flange (5), a right flange (6), and a fixed seat (9); the flange (5) and the right flange (6) are rotatably mounted on the outside of the rotating shaft (11) via bearings; the fixed seat (9) is fixedly mounted on the left flange (5) and the right flange (6); the release assembly (7) is mounted on the fixed seat (9).

10. The life-multiplying conductive slip ring structure according to claim 3, characterized in that: The release assembly (7) also includes a connecting flange and a lock nut threaded onto the grooving bolt (71); one end of the memory metal tube (72) abuts against the outer shell, and the other end abuts against the connecting flange.

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