Radially nested rotary electrical transmission device

Abstract

The radial nested rotary electric transmission device comprises a shell, a shaft sleeve, a rolling ring assembly, a slip ring assembly, a left end cover, a right end cover, a first angular contact ball bearing and a second angular contact ball bearing; the rolling ring assembly and the slip ring assembly are coaxially arranged in the shell, and the slip ring assembly is in the rolling ring assembly; the shaft sleeve is connected with one end of the shell, and the left end cover is connected with one end of the rolling ring assembly; the right end cover is connected with the other end of the shell; each of the two ends of the rolling ring assembly is provided with a first angular contact ball bearing, one of the first angular contact ball bearings is located between the shaft sleeve and the rolling ring assembly, and the other first angular contact ball bearing is located between the shell and the rolling ring assembly; the left end cover is connected with one end of the slip ring assembly, and the right end cover is connected with the other end of the slip ring assembly; each of the two ends of the slip ring assembly is provided with a second angular contact ball bearing. The rolling ring has the characteristics of low wear, long service life, large transmission power, stable tangential brush wire bundle slip ring contact and small wear under low load, and the rolling ring and the slip ring are coaxially installed, and the volume is small.

Description

Technical Field

[0001] This invention relates to the field of electro-rotational transmission, and more specifically to a radially nested rotary electro-rotational transmission device. Background Technology

[0002] Rotary electrical transmission devices enable the transmission of electrical energy and signals between two components that rotate relative to each other at n×360°. They typically consist of rotating parts, fixed parts, bearings, structural components, etc., and are mainly used in aerospace, wind power generation, medical equipment and other fields that require the transmission of electrical signals.

[0003] With the continuous development of my country's aerospace industry, the demand for high-power, long-life, and highly reliable equipment for spacecraft is constantly increasing. Simultaneously, higher requirements are being placed on the transmission power and operational lifespan of the accompanying space electrical transmission equipment. Under the premise of ensuring the safety and stability of electrical transmission, increasing transmission power and extending operational lifespan are the development trends of rotating electrical transmission devices.

[0004] The solar panel drive mechanism needs to transmit not only high-voltage, high-current electrical power, but also low-voltage electrical signals. However, under the strict control of the size of internal components in spacecraft, traditional electrical transmission components cannot simultaneously meet the requirements for the transmission of electrical power and electrical signals. Summary of the Invention

[0005] The purpose of this invention is to provide a radially nested rotating electrical transmission device that meets the operational requirements of a solar panel drive mechanism for transmitting high-power electrical energy and providing stable electrical signals under limited space conditions.

[0006] To achieve the above objectives, the present invention provides a radially nested rotary electrical transmission device, comprising a housing, a bushing, a rolling ring assembly, a slip ring assembly, a left end cover, a right end cover, a first angular contact ball bearing, and a second angular contact ball bearing; the rolling ring assembly and the slip ring assembly are coaxially disposed within the housing, and the slip ring assembly is located within the rolling ring assembly; the bushing is connected to one end of the housing, at which the left end cover is connected to one end of the rolling ring assembly; the right end cover is connected to the other end of the housing; each end of the rolling ring assembly has a first angular contact ball bearing, one first angular contact ball bearing being located between the bushing and the rolling ring assembly, and the other first angular contact ball bearing being located between the housing and the rolling ring assembly; the pair of first angular contact ball bearings are mounted face-to-face; the left end cover is connected to one end of the slip ring assembly, and the right end cover is connected to the other end of the slip ring assembly; each end of the slip ring assembly has a second angular contact ball bearing, and the pair of second angular contact ball bearings are mounted face-to-face.

[0007] In the aforementioned radial nested rotary electric transmission device, each end of the rolling ring assembly has a loop seal, which is used to prevent wear debris generated during the movement of the rolling ring assembly from moving into the gap of the first angular contact ball bearing.

[0008] In the aforementioned radial nested rotary electrical transmission device, the circuit seal includes an outer sealing ring and an inner sealing ring. The outer side of the inner sealing ring is designed with a rectangular tooth structure, and the inner side of the outer sealing ring is also designed with a rectangular tooth structure. The inner sealing ring and the outer sealing ring are engaged by the rectangular tooth structure, with gaps between the tooth tip and the tooth root, and between the teeth.

[0009] The aforementioned radially nested rotary electrical transmission device, wherein the rolling ring assembly includes an inner conductive ring, an outer conductive ring, an inner insulating layer, an outer insulating layer, a flexible ring, an idler wheel, a rolling ring shaft, and a rolling ring bearing seat; the inner conductive ring and the inner insulating layer are sleeved on the rolling ring shaft; a plurality of inner conductive rings are arranged axially, and an inner insulating layer is disposed between any two adjacent inner conductive rings; a plurality of outer conductive rings are arranged axially, and an outer insulating layer is disposed between any two adjacent outer conductive rings; the outer conductive rings correspond one-to-one with the inner conductive rings, and the outer conductive rings... An electric ring and its corresponding inner conductive ring form a loop; in each loop, a plurality of flexible rings and a plurality of idler wheels are arranged between the outer conductive ring and the inner conductive ring, and the flexible rings and idler wheels are arranged alternately along the circumferential direction; the rolling ring bearing seat is fixed to one end of the rolling ring shaft, and the other end of the rolling ring shaft is connected to the outer shell; the left end cover is fixed to the rolling ring bearing seat; one first angular contact ball bearing is located between the rolling ring bearing seat and the bushing, and another first angular contact ball bearing is located between the rolling ring shaft and the outer shell.

[0010] In the aforementioned radially nested rotary electrical transmission device, the outer diameter of the flexible ring is greater than the difference between the inner diameter of the outer conductive ring and the outer diameter of the inner conductive ring. The flexible ring is fixed between the inner diameter of the outer conductive ring and the outer diameter of the inner conductive ring by the rebound force of radial deformation. The idler wheel separates two adjacent flexible rings to prevent interference between the flexible rings during rotation.

[0011] In the aforementioned radially nested rotary electrical transmission device, the outer wall of the rolling ring shaft is provided with a plurality of inner positioning strips, which are evenly arranged along the circumferential direction. The inner sidewalls of the inner conductive ring and the inner insulating layer are in contact with the inner positioning strips. The inner sidewall of the outer shell is provided with a plurality of outer positioning strips, which are evenly arranged along the circumferential direction. The outer sidewalls of the outer conductive ring and the outer insulating layer are in contact with the outer positioning strips. The inner sidewall of the inner conductive ring is provided with a plurality of lugs, which are evenly arranged along the circumferential direction. The outer sidewall of the outer conductive ring is provided with a plurality of lugs, which are evenly arranged along the circumferential direction. The lugs are used for routing wires in the rolling ring assembly.

[0012] The aforementioned radially nested rotary electric transmission device, wherein the slip ring assembly includes a slip ring shaft, a slip ring bearing seat, an insulating bushing, a conductive ring body, insulating sheets, a combined support, a brush plate, a brush filament bundle, a slip ring housing, and a slip ring end cap; the slip ring housing separates the slip ring assembly from the rolling ring assembly; the slip ring shaft is disposed within the slip ring housing; the insulating bushing is mounted on the outer side of the slip ring shaft; a plurality of insulating sheets and a plurality of conductive ring bodies are fitted onto the insulating bushing, and the insulating sheets and conductive ring bodies are alternately arranged along the axial direction; the slip ring... One end of the shaft is connected to the left end cap, and the slip ring bearing seat is fixed on the other end of the slip ring shaft; the combined bracket is mounted on the outside of the insulating sheet and the conductive ring assembly; two brush plates are mounted on the outside of the combined bracket, and the two brush plates are evenly arranged along the circumferential direction; the brush filaments pass through the copper sleeve and are fixed on the brush plates; the slip ring end cap is connected to one end of the combined bracket by screws, and the right end cap is connected to the other end of the combined bracket by screws; both ends of the slip ring outer shell are connected to the combined bracket by screws.

[0013] In the aforementioned radially nested rotary electric transmission device, one second angular contact ball bearing is located between the combined bracket and the slip ring shaft, and another second angular contact ball bearing is located between the combined bracket and the slip ring bearing housing.

[0014] In the aforementioned radially nested rotary electrical transmission device, the inner wall of the conductive ring is provided with a lug for routing the slip ring assembly.

[0015] In the aforementioned radial nested rotary electric transmission device, two rows of brush filament bundles are provided on the same brush plate. The distance between the positioning points of the two rows of brush filament bundles is less than the outer diameter of the conductive ring. The free ends of the brush filament bundles achieve stable contact with the conductive ring through the elastic force generated by deformation.

[0016] Compared with the prior art, the beneficial technical effects of the present invention are:

[0017] The radial nested rotary electrical transmission device of the present invention combines two different types of electrical transmission configurations, giving full play to the characteristics of low wear, long life and high transmission power of the rolling ring and stable contact and low wear under low load of the tangential brush bundle slip ring. The rolling ring transmits high-power electrical energy and the tangential brush bundle slip ring transmits low-power electrical signals. The two are installed coaxially, realizing the separation of the power ring and the electrical signal ring while minimizing the overall size of the device, which can well meet the needs of spacecraft for small-volume high-power electrical transmission devices. Attached Figure Description

[0018] The radially nested rotating electrical transmission device of the present invention is given by the following embodiments and figures.

[0019] Figure 1 This is a schematic diagram of the axial cross-sectional structure of a radially nested rotary electric transmission device according to a preferred embodiment of the present invention.

[0020] Figure 2 This is a radial cross-sectional view of a radially nested rotating electric transmission device according to a preferred embodiment of the present invention. Detailed Implementation

[0021] The following will combine Figures 1-2 The radially nested rotating electrical transmission device of the present invention will be described in further detail.

[0022] The innovation of this invention lies in the fact that both a slip ring assembly and a rolling ring assembly are set in the same rotating electrical transmission device. The slip ring assembly and the rolling ring assembly are installed coaxially. The rolling ring assembly transmits high-power electrical energy, while the slip ring assembly transmits low-power electrical signals.

[0023] Figure 1 The diagram shown is an axial cross-sectional view of a radially nested rotary electric transmission device according to a preferred embodiment of the present invention. Figure 2 The diagram shown is a radial cross-sectional view of a radially nested rotating electrical transmission device according to a preferred embodiment of the present invention.

[0024] like Figure 1 and Figure 2 As shown, the radial nested rotary electric transmission device of this embodiment includes a housing 1, a bushing 2, a retaining ring 3, a rolling ring assembly, a slip ring assembly, a left end cover 4, a right end cover 18, a connector 19, a first angular contact ball bearing 6, a second angular contact ball bearing 22, an inner sealing ring 8, and an outer sealing ring 7; the rolling ring assembly includes an inner conductive ring 13, an outer conductive ring 14, an inner insulating layer 11, an outer insulating layer 12, a flexible ring 15, an idler wheel 16, a rolling ring shaft 17, and a rolling ring bearing seat 5; the slip ring assembly includes a slip ring shaft 21, a slip ring bearing seat 20, an insulating bushing 28, a conductive ring body 26, an insulating sheet 25, a combined bracket 23, a brush plate 24, a brush filament bundle 27, a slip ring housing 29, and a slip ring end cover 30.

[0025] The inner conductive ring 13 and the inner insulating layer 11 are sleeved on the roller ring shaft 17; a plurality of inner conductive rings 13 are arranged along the axial direction, and an inner insulating layer 11 is arranged between any two adjacent inner conductive rings 13, that is, the inner conductive rings 13 and the inner insulating layer 11 are alternately arranged along the axial direction; a plurality of outer conductive rings 14 are arranged along the axial direction, and an outer insulating layer 12 is arranged between any two adjacent outer conductive rings 14, that is, the outer conductive rings 14 and the outer insulating layer 12 are alternately arranged along the axial direction; the outer conductive rings 14 correspond one-to-one with the inner conductive rings 13, and the outer conductive rings 14 and their corresponding inner conductive rings 13 form a loop, that is, a plurality of loops are arranged along the axial direction.

[0026] In each loop, a plurality of flexible rings 15 and a plurality of idler wheels 16 are disposed between the outer conductive ring 14 and the inner conductive ring 13, and the flexible rings 15 and the idler wheels 16 are arranged alternately along the circumferential direction; for example Figure 1 The outer diameter of the flexible ring 15 is slightly larger than the difference between the inner diameter of the outer conductive ring 14 and the outer diameter of the inner conductive ring 13. The flexible ring 15 is fixed between the inner diameter of the outer conductive ring 14 and the outer diameter of the inner conductive ring 13 by the elastic force of radial deformation. The idler wheel 16 separates two adjacent flexible rings 15 to prevent interference during rotation. The loops are separated by the inner insulating layer 11 and the outer insulating layer 12.

[0027] The rolling ring shaft 17 is disposed inside the outer casing 1, and each layer of the rolling ring assembly is disposed between the rolling ring shaft 17 and the outer casing 1. Four inner positioning strips 9 are provided on the outer side wall of the rolling ring shaft 17, and the four inner positioning strips 9 are evenly arranged along the circumferential direction. The inner sidewalls of the inner conductive ring 13 and the inner insulating layer 11 are in contact with the inner positioning strips 9. Four outer positioning strips 10 are provided on the inner sidewall of the outer casing 1, and the four outer positioning strips 10 are evenly arranged along the circumferential direction. The outer sidewalls of the outer conductive ring 14 and the outer insulating layer 12 are in contact with the outer positioning strips 10. The inner positioning strips 9 and the outer positioning strips 10 limit the directional movement of each layer of the rolling ring assembly.

[0028] Each end of the rolling ring assembly has a first angular contact ball bearing 6; the rolling ring bearing housing 5 is fixed to one end of the rolling ring shaft 17 by screws, the bushing 2 is fixed to the outer casing 1 by screws, and a first angular contact ball bearing 6 is located between the rolling ring bearing housing 5 and the bushing 2 (see...). Figure 1 (Left side); another first angular contact ball bearing 6 is located between the other end of the rolling ring shaft 17 and the housing 1 (see left side). Figure 1(Right side); a pair of first angular contact ball bearings 6 are mounted face-to-face; the outer side of the inner seal ring 8 is designed with a rectangular tooth structure, and the inner side of the outer seal ring 7 is also designed with a rectangular tooth structure. The inner seal ring 8 and the outer seal ring 7 are fitted by the rectangular tooth structure (with gaps between the tooth tip and tooth root, and between the teeth), forming a loop seal. One of the loop seals is arranged at each end of the rolling ring assembly to prevent wear debris generated during the loop movement in the rolling ring assembly from moving into the gap of the first angular contact ball bearing 6; in the axial direction, the outer seal rings at both ends 7 is respectively fitted to the bushing 2 and the outer shell 1, and the inner sealing rings 8 at both ends are respectively fitted to the rolling ring bearing seat 5 and the rolling ring shaft 17; the left end cover 4 is fixed to the rolling ring bearing seat 5 by screws, and the right end cover 18 is fixed to the outer shell 1 by screws; the axial clamping force generated by the screws between the right end cover 18 and the outer shell 1, between the bushing 2 and the outer shell 1, and between the left end cover 4 and the rolling ring bearing seat 5 axially fixes the outer sealing ring 7, the inner sealing ring 8 and the rolling ring assembly between the rolling ring shaft 17 and the outer shell 1, preventing axial movement of each ring layer;

[0029] The inner conductive ring 13 has four lugs on its inner sidewall, and the four lugs are evenly arranged along the circumference; the outer conductive ring 14 has four lugs on its outer sidewall, and the four lugs are evenly arranged along the circumference; the lugs are used for routing the rolling ring assembly.

[0030] The slip ring housing 29 is disposed in the housing 1 and is used to separate the slip ring assembly from the rolling ring assembly; the slip ring shaft 21 is disposed in the slip ring housing 29;

[0031] The insulating sleeve 28 is mounted on the outer side of the slip ring shaft 21; a plurality of insulating sheets 25 and a plurality of conductive rings 26 are fitted on the insulating sleeve 28, and the insulating sheets 25 and the conductive rings 26 are arranged alternately along the axial direction, that is, two adjacent conductive rings 26 are separated by the insulating sheets 25; one end of the slip ring shaft 21 is connected to the left end cover 4 by screws, and the slip ring bearing seat 20 is fixed to the other end of the slip ring shaft 21 by screws; the axial clamping force generated by the screws between the left end cover 4 and the slip ring shaft 21, and between the slip ring bearing seat 20 and the slip ring shaft 21, axially fixes the insulating sheets 25 and the conductive rings 26 to the slip ring shaft 21 to prevent axial movement during the movement;

[0032] The insulating sheet 25 and the conductive ring 26 are assembled together with a combined bracket 23 on the outside. Two brush plates 24 are mounted on the outside of the combined bracket 23, and the two brush plates 24 are evenly arranged in the circumferential direction. The brush filament bundles 27 pass through the copper sleeve and are fixed on the brush plates 24. Two rows of brush filament bundles 27 are provided on the same brush plate 24. The distance between the positioning points of the two rows of brush filament bundles 27 (the positioning points refer to the connection points between the brush filament bundles 27 and the brush plates 24) is less than the outer diameter of the conductive ring 26. The free ends of the brush filament bundles 27 achieve stable contact with the conductive ring 26 through the elastic force generated by deformation.

[0033] The slip ring shaft 21, the insulating bushing 28, the insulating sheet 25, the conductive ring body 26, the slip ring bearing seat 20, the combined bracket 23, the brush plate 24, and the brush filament bundle 27 are all placed in the slip ring housing 29; the slip ring end cap 30 is connected to one end of the combined bracket 23 by screws, and the right end cap 18 is connected to the other end of the combined bracket 23 by screws; both ends of the slip ring housing 29 are connected to the combined bracket 23 by screws;

[0034] The slip ring assembly has a second angular contact ball bearing 22 at each end, and one second angular contact ball bearing 22 is located between the combined bracket 23 and the slip ring shaft 21 (see...). Figure 1 (Left side), another second angular contact ball bearing 22 is located between the combined bracket 23 and the slip ring bearing seat 20 (see left side). Figure 1 (Right side); a pair of second angular contact ball bearings 22, mounted face-to-face;

[0035] The inner wall of the conductive ring 26 is provided with a lug, which is used for the routing of the slip ring assembly.

[0036] The left end cover 4 is connected to the rolling ring bearing seat 5 and the slip ring shaft 21 by screws, so that the inner conductive ring 13 in the rolling ring assembly rotates at the same speed as the conductive ring body 26 in the slip ring assembly; the right end cover 18 is connected to the rolling ring shaft 17 and the combined bracket 23 by screws, so that the outer conductive ring 14 in the rolling ring assembly rotates at the same speed as the brush filament bundle 27 in the slip ring assembly, thereby realizing power transmission and electrical signal transmission from the rotating end to the fixed end of the electrical transmission device.

[0037] In this embodiment, the rolling ring assembly and slip ring assembly of the radially nested electrical transmission device are modularly designed. They can be assembled separately and then combined to complete the final assembly, making installation convenient and highly flexible. The rolling ring assembly features low wear and long lifespan due to its rolling contact, and each layer of the ring has multiple flexible rings connected in parallel, making it suitable for transmitting high-power current. The brush portion of the slip ring assembly consists of metal brush filament bundles, which distributes the load across each filament, resulting in lower wear, stable contact, and suitability for transmitting electrical signals. The radial nesting of both components fully utilizes their advantages, saves space, and reduces costs.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the scope of the present invention.

Claims

1. A radially nested rotary electric transmission device, characterized in that, Includes housing, bushing, rolling ring assembly, slip ring assembly, left end cover, right end cover, first angular contact ball bearing and second angular contact ball bearing; The rolling ring assembly and the slip ring assembly are coaxially disposed within the housing, with the slip ring assembly located within the rolling ring assembly. The bushing is connected to one end of the housing. At this end, the left end cap is connected to one end of the rolling ring assembly; the right end cap is connected to the other end of the housing; each end of the rolling ring assembly has a first angular contact ball bearing, one first angular contact ball bearing is located between the bushing and the rolling ring assembly, and the other first angular contact ball bearing is located between the housing and the rolling ring assembly; both first angular contact ball bearings are mounted face-to-face. The left end cap is connected to one end of the slip ring assembly, and the right end cap is connected to the other end of the slip ring assembly; each end of the slip ring assembly has a second angular contact ball bearing, and the pair of second angular contact ball bearings are installed face to face; The rolling ring assembly includes an inner conductive ring, an outer conductive ring, an inner insulating layer, an outer insulating layer, a flexible ring, an idler wheel, a rolling ring shaft, and a rolling ring bearing housing; The inner conductive ring and the inner insulating layer are sleeved on the roller ring shaft; a plurality of inner conductive rings are arranged along the axial direction, and an inner insulating layer is arranged between any two adjacent inner conductive rings; a plurality of outer conductive rings are arranged along the axial direction, and an outer insulating layer is arranged between any two adjacent outer conductive rings; the outer conductive rings correspond one-to-one with the inner conductive rings, and the outer conductive rings and their corresponding inner conductive rings form a loop; in each loop, a plurality of flexible rings and a plurality of idler wheels are arranged between the outer conductive rings and the inner conductive rings, and the flexible rings and idler wheels are arranged alternately along the circumferential direction; The rolling ring bearing housing is fixed to one end of the rolling ring shaft, and the other end of the rolling ring shaft is connected to the outer casing; the left end cap is fixed to the rolling ring bearing housing; one first angular contact ball bearing is located between the rolling ring bearing housing and the bushing, and another first angular contact ball bearing is located between the rolling ring shaft and the outer casing; The slip ring assembly includes a slip ring shaft, a slip ring bearing housing, an insulating bushing, a conductive ring body, an insulating sheet, a combined bracket, a brush plate, a brush filament bundle, a slip ring housing, and a slip ring end cap; The slip ring housing separates the slip ring assembly from the rolling ring assembly; the slip ring shaft is disposed within the slip ring housing; an insulating bushing is mounted on the outer side of the slip ring shaft; a plurality of insulating sheets and a plurality of conductive rings are fitted onto the insulating bushing, with the insulating sheets and conductive rings arranged alternately along the axial direction; one end of the slip ring shaft is connected to the left end cap, and the slip ring bearing seat is fixed to the other end of the slip ring shaft; a combined bracket is mounted on the outer side of the combination of insulating sheets and conductive rings; two brush plates are mounted on the outer side of the combined bracket, and the two brush plates are evenly arranged along the circumferential direction; the brush filaments pass through the copper sleeve and are fixed on the brush plates; the slip ring end cap is connected to one end of the combined bracket by screws, and the right end cap is connected to the other end of the combined bracket by screws; both ends of the slip ring housing are connected to the combined bracket by screws.

2. The radially nested rotary electric transmission device as described in claim 1, characterized in that, Each end of the rolling ring assembly has a loop seal, which is used to prevent wear debris generated during the movement of the rolling ring assembly from moving into the gap of the first angular contact ball bearing.

3. The radially nested rotary electric transmission device as described in claim 2, characterized in that, The circuit seal includes an outer sealing ring and an inner sealing ring. The outer side of the inner sealing ring is designed with a rectangular tooth structure, and the inner side of the outer sealing ring is also designed with a rectangular tooth structure. The inner sealing ring and the outer sealing ring are engaged by the rectangular tooth structure, and gaps are left between the tooth tip and tooth root, and between the teeth.

4. The radially nested rotary electric transmission device as described in claim 1, characterized in that, The outer diameter of the flexible ring is greater than the difference between the inner diameter of the outer conductive ring and the outer diameter of the inner conductive ring. The flexible ring is fixed between the inner diameter of the outer conductive ring and the outer diameter of the inner conductive ring by the rebound force of radial deformation. The idler wheel separates two adjacent flexible rings to prevent interference between the flexible rings during rotation.

5. The radially nested rotary electric transmission device as described in claim 1, characterized in that, The outer side wall of the roller ring shaft is provided with a plurality of inner positioning strips, which are evenly arranged along the circumferential direction. The inner side wall of the inner conductive ring and the inner insulating layer are in contact with the inner positioning strips. The inner side wall of the outer shell is provided with a plurality of outer positioning strips, which are evenly arranged along the circumferential direction. The outer side wall of the outer conductive ring and the outer insulating layer are in contact with the outer positioning strips. The inner side wall of the inner conductive ring is provided with a plurality of lugs, which are evenly arranged along the circumferential direction. The outer side wall of the outer conductive ring is provided with a plurality of lugs, which are evenly arranged along the circumferential direction. The lugs are used for the routing of the roller ring assembly.

6. The radially nested rotary electric transmission device as described in claim 1, characterized in that, One second angular contact ball bearing is located between the combined bracket and the slip ring shaft, and another second angular contact ball bearing is located between the combined bracket and the slip ring bearing housing.

7. The radially nested rotary electric transmission device as described in claim 1, characterized in that, The inner wall of the conductive ring is provided with a lug, which is used for the routing of the slip ring assembly.

8. The radially nested rotary electric transmission device as described in claim 1, characterized in that, The same brush plate has two rows of brush filament bundles. The distance between the positioning points of the two rows of brush filament bundles is less than the outer diameter of the conductive ring. The free ends of the brush filament bundles achieve stable contact with the conductive ring through the elastic force generated by deformation.

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