Strong and weak current isolation conductive slip ring

Abstract

The invention relates to the field of conductive slip rings, in particular to a strong and weak current isolation conductive slip ring, which comprises a shell, a first contact compensation device, a second contact compensation device and a multi-layer shielding structure, and is characterized in that a strong conductive inner ring, a weak conductive inner ring, a strong conductive outer ring and a weak conductive outer ring are coaxially arranged in the shell; the first contact compensation device is fixed on the inner wall of the strong conductive outer ring and is used for adjusting the contact pressure between the electric brush and the strong conductive inner ring, the second contact compensation device is fixed on the inner wall of the weak conductive outer ring and is used for adjusting the contact pressure between the electric brush and the weak conductive inner ring, and the multi-layer shielding structure is arranged between the strong conductive system and the weak conductive system. And strong and weak current complete isolation is realized. The contact pressure between the electric brush and the conductive inner ring can be adjusted, the electric brush structure can automatically and elastically compensate along with abrasion of the conductive inner ring, it is ensured that the contact surface always keeps stable pressure and area, and the problems of poor contact, transmission distortion or failure caused by long-term friction of a traditional conductive slip ring are effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of conductive slip rings, and specifically to a strong-weak electricity isolated conductive slip ring. Background Art

[0002] A conductive slip ring is a commonly used conductive device, mainly used in continuous rotation occasions to continuously conduct the cables of the rotating part and the fixed base part.

[0003] A conductive slip ring usually consists of a conductive inner ring, an outer ring and a brush. The current conduction is achieved through the contact between the brush and the inner and outer rings. Traditionally, the initial contact pressure is provided by the material of the brush itself. However, during the long-term rotation drive process, the contact surface between the brush and the conductive inner ring will gradually wear due to friction, resulting in a decrease in contact pressure, a reduction in contact area, and even gaps, thereby leading to a decrease in energy transmission efficiency and even causing arc discharge and safety accidents in severe cases. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the contact surface between the brush and the conductive inner ring in the prior art will gradually wear due to friction, resulting in a decrease in contact pressure, a reduction in contact area, and even gaps, so as to provide a strong-weak electricity isolated conductive slip ring.

[0005] To solve the above technical problem, the present invention provides a strong-weak electricity isolated conductive slip ring, which includes a housing, a first contact compensation device, a second contact compensation device and a multi-layer shielding structure. A strong conductive inner ring, a weak conductive inner ring, a strong conductive outer ring and a weak conductive outer ring are coaxially arranged inside the housing; The first contact compensation device is fixed on the inner wall of the strong conductive outer ring and is used to adjust the contact pressure between the brush and the strong conductive inner ring; The second contact compensation device is fixed on the inner wall of the weak conductive outer ring and is used to adjust the contact pressure between the brush and the weak conductive inner ring; The multi-layer shielding structure is arranged between the strong conductive system and the weak conductive system to achieve complete isolation of strong and weak electricity.

[0006] Further, both the first contact compensation device and the second contact compensation device include: A first brush holder, fixed on the inner wall of the strong conductive outer ring or the weak conductive outer ring; Multiple first brushes, in a "C" - shaped structure, and the multiple first brushes are equidistantly fixed on the first brush holder.

[0007] Further, the first brush includes a straight part, and a first conductive part and a second conductive part are respectively fixed at both ends of the straight part; A first conductive block is fixed on the outer side of the first conductive part, and a second conductive block is fixedly connected to the inner side of the first conductive part; A third conductive block is fixed on the outer side of the second conductive portion, and a fourth conductive block is fixedly connected on the inner side of the second conductive portion.

[0008] Furthermore, a support rod is fixedly connected between the first conductive part and the second conductive part.

[0009] Furthermore, the outer wall of the strong conductive inner ring or the weak conductive inner ring is provided with a plurality of annular first conductive slideways along the length direction, and the ends of the first conductive portion and the second conductive portion are slidably connected to the first conductive slideways; A first positioning groove is provided on one side of the inner wall of the first conductive slideway, and a second positioning groove is provided on the other side of the inner wall of the first conductive slideway; In the initial state, the second conductive block on the first conductive part is attached to the second positioning groove of one of the first conductive slideways, and the third conductive block on the second conductive part is attached to the second positioning groove of another adjacent first conductive slideway; When the contact is poor, push the strong conductive inner ring and the weak conductive inner ring, and the ends of the first conductive part and the second conductive part slide horizontally in the first conductive slide, so that the first conductive block on the first conductive part fits into the first positioning groove of one of the first conductive slides, and the fourth conductive block on the second conductive part fits into the first positioning groove of another adjacent first conductive slide.

[0010] Furthermore, it also includes a strong rotating sleeve, a weak rotating sleeve and an outer isolation sleeve, wherein the strong rotating sleeve is rotatably connected to the fixed flange through a ball bearing, and the fixed flange is fixed to one end of the housing; The weak rotation sleeve is rotatably connected to the interior of the other end of the housing through a seat bearing; The outer isolation sleeve is fixed between the fixed flange and the bearing seat, and the strong conductive outer ring and the weak conductive outer ring are respectively fixed on both sides of the inner wall of the outer isolation sleeve; The strong conductive inner ring fixed sleeve is arranged outside the strong rotating sleeve, the weak conductive inner ring fixed sleeve is arranged outside the weak rotating sleeve, and the multi-layer shielding structure is fixed between the strong rotating sleeve and the weak rotating sleeve.

[0011] Furthermore, the inner wall of the inner ring of the ball bearing is provided with a plurality of limiting grooves at equal distances around the circumference, and the outer side of the strong rotation sleeve is provided with a plurality of protrusions at equal distances around the circumference, and the protrusions correspond to the limiting grooves.

[0012] Furthermore, a lower ring groove is provided on the outer surface of the weakly conductive inner ring near one end of the seat bearing, the seat bearing is sleeved in the lower ring groove, and a distance is left between the inner ring of the seat bearing and the inner wall of the lower ring groove.

[0013] Furthermore, the first contact compensation device and the second contact compensation device each include: The second brush holder is fixed to the inner wall of the strong conductive outer ring or the weak conductive outer ring; The second brush is in a "匚"-shaped structure. The second brush is fixed on the second brush holder, and fifth conductive blocks are fixed on the left and right sides of both ends of the second brush. The elastic rod is fixedly connected between the inner walls of the second brush.

[0014] Further, a plurality of annular second conductive chutes are provided on the outer wall of the strong conductive inner ring or the weak conductive inner ring along the length direction, and both ends of the second brush are slidably connected in the second conductive chutes. Third positioning grooves are formed on the opposite sides of adjacent two of the second conductive chutes. During use, the elastic rod provides elastic force to make both sides of the second brush fit against the inner walls of the second conductive chutes, and the fifth conductive blocks fit into the third positioning grooves.

[0015] Further, it further includes a strong power input wire, a strong power output wire, a weak power input wire and a weak power output wire. One end of the strong power input wire passes through the through holes on the weak rotating sleeve and the strong rotating sleeve and is fixed on the inner wall of the strong conductive inner ring. One end of the strong power output wire is fixed on the strong conductive outer ring, and the other end of the strong power output wire passes through the through holes on the outer isolation sleeve and the housing and extends to the outside of the housing. One end of the weak power input wire passes through the through hole on the weak rotating sleeve and is fixed on the weak conductive inner ring. One end of the weak power output wire is fixed on the weak conductive outer ring, and the other end of the weak power output wire passes through the through holes on the outer isolation sleeve and the housing and extends to the outside of the housing.

[0016] Further, an isolation cylinder is fixedly connected to the inner walls of the strong rotating sleeve and the weak rotating sleeve. The isolation cylinder includes a cylinder body, and a plurality of isolation strips are fixedly connected inside the cylinder body at equal circumferential intervals. The isolation strips divide the inner part of the cylinder body into a plurality of isolation channels, and the strong power input wire and the weak power input wire are respectively located in different isolation channels.

[0017] By means of the above technical solution, the present invention provides a strong and weak power isolation conductive slip ring, which at least has the following beneficial effects: 1. For this strong and weak power isolation conductive slip ring, through the settings of the first contact compensation device and the second contact compensation device, the contact pressure between the brush and the conductive inner ring can be adjusted. The first contact compensation device is fixed on the inner wall of the strong conductive outer ring, and the second contact compensation device is fixed on the inner wall of the weak conductive outer ring. Its brush structure can automatically elastically compensate for the wear of the conductive inner ring, ensuring that the contact surface always maintains a stable pressure and area, effectively solving the problems of poor contact, transmission distortion or failure caused by long-term friction of the traditional conductive slip ring.

[0018] 2. The strong and weak current isolation conductive slip ring has conductive blocks at both ends of the brush, and two-way contact positioning is achieved through the positioning groove in the conductive slide. Even if there is local wear, the contact position can still be adjusted to maintain the stability of the conductive path, reduce the risk of arc discharge caused by single-point wear, and improve reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 For the present invention Figure 1 A local enlarged view of point A; Figure 3 This is a schematic structural diagram of a second contact compensation device according to the present invention; Figure 4 This is a rear axial view of the second contact compensation device structure of the present invention; Figure 5 Schematic diagram of the brush structure of the present invention; Figure 6 This is a schematic diagram of the brush holder structure of the present invention; Figure 7 For the present invention Figure 1 A schematic diagram of the partially enlarged structure at point B; Figure 8 This is a schematic diagram of the isolation tube structure of the present invention; Figure 9 This is a structural diagram of another embodiment of the present invention; Figure 10 For the present invention Figure 9 A schematic diagram of the partially enlarged structure at point C; Figure 11 FIG. 4 is a schematic structural diagram of a contact compensation device in another embodiment of the present invention.

[0021] In the figure: 1, housing; 2, strong conductive inner ring; 3, weak conductive inner ring; 301, first conductive slide; 302, first positioning groove; 303, second positioning groove; 304, lower ring groove; 4, strong conductive outer ring; 5, weak conductive outer ring; 6, first contact compensation device; 7, second contact compensation device; 701, first brush holder; 702, first brush; 703, support rod; 7021, straight part; 7022, first conductive part; 7023, second conductive part; 7024, first conductive Block; 7025, second conductive block; 7026, third conductive block; 7027, fourth conductive block; 8, multi-layer shielding structure; 9, strong rotation sleeve; 901, protrusion; 10, weak rotation sleeve; 11, outer isolation sleeve; 12, fixing flange; 13, ball bearing; 1301, limiting groove; 14, isolation cylinder; 1401, cylinder; 1402, isolation strip; 15, bearing with seat; 16, strong current input line; 17, strong current output line; 18, weak current input line; 19, weak current output line; 301', second conductive slide; 302', third positioning groove; 701', second brush holder; 702', second brush; 703', fifth conductive block; 704', elastic rod. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1 A strong and weak electrical isolation conductive slip ring comprises a shell 1, a first contact compensation device 6, a second contact compensation device 7, a multi-layer shielding structure 8, a strong rotating sleeve 9, a weak rotating sleeve 10 and an outer isolation sleeve 11. A strong conductive inner ring 2, a weak conductive inner ring 3, a strong conductive outer ring 4 and a weak conductive outer ring 5 are coaxially arranged inside the shell 1; The first contact compensation device 6 is fixed to the inner wall of the highly conductive outer ring 4 and is used to adjust the contact pressure between the brush and the highly conductive inner ring 2; The second contact compensation device 7 is fixed to the inner wall of the weakly conductive outer ring 5 and is used to adjust the contact pressure between the brush and the weakly conductive inner ring 3; by providing the first contact compensation device 6 and the second contact compensation device 7, the contact pressure between the brush and the conductive inner ring can be adjusted. The first contact compensation device 6 is fixed to the inner wall of the strongly conductive outer ring 4, and the second contact compensation device 7 is fixed to the inner wall of the weakly conductive outer ring 5. Its brush structure can automatically elastically compensate for the wear of the conductive inner ring, ensuring that the contact surface always maintains a stable pressure and area, effectively solving the problems of poor contact, transmission distortion or failure caused by long-term friction of traditional conductive slip rings.

[0024] The multi-layer shielding structure 8 is arranged between the strongly conductive system and the weakly conductive system to achieve complete isolation of strong and weak electricity; the multi-layer shielding structure 8 includes an inner shielding layer and an outer shielding layer. The inner shielding layer is made of a high-conductivity material, and the outer shielding layer is made of a high-permeability material. The two cooperate to form a Faraday cage effect to suppress electromagnetic radiation; the inner shielding layer is made of graphene material, the outer shielding layer is made of permalloy or nanocrystalline alloy, and the inner shielding layer and the outer shielding layer are connected together to form a continuous shielding body.

[0025] The strong rotating sleeve 9 is rotatably connected to the fixed flange 12 through a ball bearing 13, and the fixed flange 12 is fixed to one end of the housing 1; The weak rotating sleeve 10 is rotatably connected to the inside of the other end of the housing 1 through a pedestal bearing 15; The outer isolation sleeve 11 is fixed between the fixed flange 12 and the pedestal bearing 15. The strongly conductive outer ring 4 and the weakly conductive outer ring 5 are respectively fixed to both sides of the inner wall of the outer isolation sleeve 11, which can reduce the interference of electromagnetic radiation.

[0026] Among them, the strongly conductive inner ring 2 is fixedly sleeved outside the strong rotating sleeve 9, the weakly conductive inner ring 3 is fixedly sleeved outside the weak rotating sleeve 10, and the multi-layer shielding structure 8 is fixed between the strong rotating sleeve 9 and the weak rotating sleeve 10, effectively blocking the electromagnetic interference between strong and weak electricity signals.

[0027] In some embodiments, such as Figure 2 、 Figure 3 and Figure 4 shown, both the first contact compensation device 6 and the second contact compensation device 7 include a first brush holder 701 and a plurality of first brushes 702. The first brush holder 701 is fixed to the inner wall of the strongly conductive outer ring 4 or the weakly conductive outer ring 5 by screws; The first brush 702 has a "C" - shaped structure, and a plurality of first brushes 702 are fixed to the first brush holder 701 at equal intervals.

[0028] In some embodiments, such as Figure 5 shown, the first brush 702 includes a straight portion 7021, and a first conductive portion 7022 and a second conductive portion 7023 are respectively fixed at both ends of the straight portion 7021; A first conductive block 7024 is fixed to the outer side of the first conductive portion 7022 , and a second conductive block 7025 is fixedly connected to the inner side of the first conductive portion 7022 ; A third conductive block 7026 is fixed to the outer side of the second conductive portion 7023 , and a fourth conductive block 7027 is fixedly connected to the inner side of the second conductive portion 7023 .

[0029] like Figure 3 and Figure 6 As shown, the first brush holder 701 is provided with a plurality of mounting holes along its length direction, and the ends of the first conductive part 7022 and the second conductive part 7023 pass through the mounting holes. A straight groove is provided on the inner side wall of the first brush holder 701, and the straight part 7021 is located in the straight groove and is arranged flush with the first brush holder 701.

[0030] In some embodiments, as Figure 2-Figure 5 As shown, a support rod 703 is fixedly connected between the first conductive part 7022 and the second conductive part 7023. The support rod 703 is made of rigid metal and is vertically fixed to the inner side walls of the first conductive part 7022 and the second conductive part 7023 by welding to form a stable support structure.

[0031] During rotation, friction between the first brush 702 and the first conductive track 301 generates a force. The support rod 703 effectively resists lateral deformation of the first brush 702 caused by centrifugal force, ensuring that the ends of the first conductive portion 7022 and the second conductive portion 7023 always remain in close contact with the inner wall of the first conductive track 301. Even if the first brush 702 becomes partially worn after long-term use, the support rod 703 maintains the rigidity of the overall structure of the first brush 702, preventing uneven contact pressure caused by deformation.

[0032] In some embodiments, as Figure 2-Figure 5 As shown, the outer wall of the strong conductive inner ring 2 or the weak conductive inner ring 3 is provided with a plurality of annular first conductive slideways 301 along the length direction, and the ends of the first conductive portion 7022 and the second conductive portion 7023 are slidably connected to the first conductive slideways 301; A first positioning groove 302 is provided on one side of the inner wall of the first conductive slide 301, and a second positioning groove 303 is provided on the other side of the inner wall of the first conductive slide 301; In the initial state, the second conductive block 7025 on the first conductive part 7022 fits into the second positioning groove 303 of one of the first conductive slides 301, and the third conductive block 7026 on the second conductive part 7023 fits into the second positioning groove 303 of another adjacent first conductive slide 301, forming a multi-point contact structure. At this time, the support rod 703 provides rigid support for the first brush 702 to ensure a tight fit.

[0033] When the contact pressure of the carbon brush decreases due to long-term friction, an external force impacts one end of the strong rotating sleeve 9 close to the fixed flange 12, pushing the entire strong conductive inner ring 2 and weak conductive inner ring 3 to slightly shift axially. The ends of the first conductive part 7022 and the second conductive part 7023 slide horizontally within the first conductive slideway 301; During the sliding process, the second conductive block 7025 disengages from the second positioning groove 303, and the third conductive block 7026 disengages from the second positioning groove 303 of the adjacent first conductive slideway 301; Finally, the first conductive block 7024 on the first conductive part 7022 fits into the first positioning groove 302 of one of the first conductive slideways 301, and the fourth conductive block 7027 on the second conductive part 7023 fits into the first positioning groove 302 of the adjacent other first conductive slideway 301.

[0034] After the adjustment is completed, the first carbon brush 702 forms a new stable contact point with the first conductive slideway 301, restoring the optimal contact pressure.

[0035] In some embodiments, a plurality of limiting grooves 1301 are provided at equal circumferential intervals on the inner wall of the inner ring of the ball bearing 13, and a plurality of convex blocks 901 are provided at equal circumferential intervals on the outer side of the strong rotating sleeve 9. The convex blocks 901 are correspondingly matched with the limiting grooves 1301. After the adjustment of the first carbon brush 702 is completed, the convex blocks 901 are embedded into the limiting grooves 1301, forming a circumferential positioning structure, ensuring the stability of the position after adjustment.

[0036] In some embodiments, a lower ring groove 304 is provided on the outer surface of the weak conductive inner ring 3 close to one end of the pedestal bearing 15. The pedestal bearing 15 is sleeved in the lower ring groove 304, and a gap a is left between the inner ring of the pedestal bearing 15 and the inner wall of the lower ring groove 304. In the initial state, the distance from the convex block 901 to the limiting groove 1301 is equal to the gap a, and the distance from the convex block 901 to the limiting groove 1301 is equal to the adjustable distance of the first carbon brush 702. Thus, by externally impacting the strong rotating sleeve 9, the entire strong conductive inner ring 2 and weak conductive inner ring 3 can be pushed to slightly shift axially.

[0037] In some embodiments, as Figures 9-11 described, both the first contact compensation device 6 and the second contact compensation device 7 include a second brush holder 701´, a second carbon brush 702´, and an elastic rod 704´. The second brush holder 701´ is fixed to the inner wall of the strong conductive outer ring 4 or the weak conductive outer ring 5; the second carbon brush 702´ has a "C" - shaped structure and is fixed to the second brush holder 701´. Fifth conductive blocks 703´ are fixed to both the left and right sides of the two ends of the second carbon brush 702´; the elastic rod 704´ is fixedly connected between the inner walls of the second carbon brush 702´, and the elastic rod 704´ is made of spring steel, forming a support structure.

[0038] The outer wall of the strong conductive inner ring 2 or the weak conductive inner ring 3 is provided with a plurality of annular second conductive slideways 301' along the length direction, and the two ends of the second brush 702' are slidably connected to the second conductive slideways 301'; A third positioning groove 302' is formed on opposite sides of two adjacent second conductive slideways 301'; During assembly, the end of the second brush 702' is embedded in the second conductive slide 301', and the elastic force of the elastic rod 704' causes the two sides of the brush to cling to the inner wall of the slide. The fifth conductive block 703' is engaged in the third positioning groove 302' to form initial contact pressure.

[0039] When the contact pressure of the second brush 702' decreases due to friction, the arched structure of the elastic rod 704' continuously provides compensation force through elastic deformation, so that the fifth conductive block 703' always fits in the third positioning groove 302', maintaining the stability of the conductive path.

[0040] In some embodiments, as Figure 1 and Figure 9 As shown, a strong and weak current isolation conductive slip ring also includes a strong current input line 16, a strong current output line 17, a weak current input line 18 and a weak current output line 19; One end of the strong power input line 16 passes through the through holes on the weak rotating sleeve 10 and the strong rotating sleeve 9 and is fixed on the inner wall of the strong conductive inner ring 2; One end of the high-voltage output line 17 is fixed to the highly conductive outer ring 4, and the other end of the high-voltage output line 17 passes through the outer isolation sleeve 11 and the through hole on the shell 1 and extends to the outside of the shell 1, ensuring that the high-voltage signal is transmitted from the stationary end to the rotating end. The through hole on the shell 1 is filled with epoxy resin potting glue to prevent external dust or liquid from invading.

[0041] One end of the weak current input line 18 passes through the through hole on the weak rotating sleeve 10 and is fixed on the weak conductive inner ring 3; One end of the weak-current output cable 19 is fixed to the weakly conductive outer ring 5. The other end of the weak-current output cable 19 passes through the outer isolation sleeve 11 and the through-hole in the housing 1 and extends to the outside of the housing 1, enabling the transmission of weak-current signals from the stationary end to the rotating end. The through-hole in the housing 1 is filled with epoxy resin potting compound to enhance sealing and mechanical strength.

[0042] In some embodiments, as Figure 1 、 Figure 8 and Figure 9As shown, the inner walls of the strong rotating sleeve 9 and the weak rotating sleeve 10 are fixedly connected to an isolation cylinder 14. The isolation cylinder 14 includes a cylinder 1401. The interior of the cylinder 1401 is fixedly connected to multiple isolation strips 1402 at equal intervals around the circumference. The isolation strips 1402 divide the interior of the cylinder 1401 into multiple isolation channels. The strong current input line 16 and the weak current input line 18 are located in different isolation channels, respectively, to achieve physical separation of the strong and weak current lines and effectively avoid signal crosstalk. At the same time, the isolation cylinder 14 made of insulating material can block static electricity accumulation, improving the safety of the equipment in high-voltage or high-humidity environments.

[0043] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0044] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A strong and weak current isolation conductive slip ring, characterized in that: Comprising: A housing (1) with a strongly conductive inner ring (2), a weakly conductive inner ring (3), a strongly conductive outer ring (4), and a weakly conductive outer ring (5) coaxially arranged inside; A first contact compensation device (6) fixed to the inner wall of the strongly conductive outer ring (4) for adjusting the contact pressure between the brush and the strongly conductive inner ring (2); A second contact compensation device (7) fixed to the inner wall of the weakly conductive outer ring (5) for adjusting the contact pressure between the brush and the weakly conductive inner ring (3); A multi-layer shielding structure (8) arranged between the strongly conductive system and the weakly conductive system to achieve complete isolation between the strong and weak electricity.

2. The strong and weak current isolation conductive slip ring according to claim 1, characterized in that: Both the first contact compensation device (6) and the second contact compensation device (7) include: A first brush holder (701) fixed to the inner wall of the strongly conductive outer ring (4) or the weakly conductive outer ring (5); A plurality of first brushes (702) in a "C" - shaped structure, and the plurality of first brushes (702) are equidistantly fixed on the first brush holder (701).

3. The strong and weak current isolation conductive slip ring according to claim 2, characterized in that: The first brush (702) includes a straight portion (7021), and a first conductive portion (7022) and a second conductive portion (7023) are respectively fixed at both ends of the straight portion (7021); A first conductive block (7024) is fixed to the outside of the first conductive portion (7022), and a second conductive block (7025) is fixedly connected to the inside of the first conductive portion (7022); A third conductive block (7026) is fixed to the outside of the second conductive portion (7023), and a fourth conductive block (7027) is fixedly connected to the inside of the second conductive portion (7023); A support rod (703) is fixedly connected between the first conductive portion (7022) and the second conductive portion (7023).

4. The strong and weak current isolation conductive slip ring according to claim 3, characterized in that: A plurality of annular first conductive slides (301) are provided along the length direction on the outer wall of the strongly conductive inner ring (2) or the weakly conductive inner ring (3), and the ends of the first conductive portion (7022) and the second conductive portion (7023) are slidably connected to the first conductive slide (301); On one side of the inner wall of the first conductive slide (301), a first positioning groove (302) is provided, and on the other side of the inner wall of the first conductive slide (301), a second positioning groove (303) is provided; In the initial state, the second conductive block (7025) on the first conductive portion (7022) fits into the second positioning groove (303) of one of the first conductive slides (301), and the third conductive block (7026) on the second conductive portion (7023) fits into the second positioning groove (303) of an adjacent other first conductive slide (301); When there is poor contact, the strongly conductive inner ring (2) and the weakly conductive inner ring (3) are pushed, and the ends of the first conductive portion (7022) and the second conductive portion (7023) slide horizontally in the first conductive slide (301) so that the first conductive block (7024) on the first conductive portion (7022) fits into the first positioning groove (302) of one of the first conductive slides (301), and the fourth conductive block (7027) on the second conductive portion (7023) fits into the first positioning groove (302) of an adjacent other first conductive slide (301).

5. The strong and weak current isolation conductive slip ring according to claim 4, characterized in that: Also including: The strong rotation sleeve (9) is rotationally connected to the fixed flange (12) through a ball bearing (13), and the fixed flange (12) is fixed to one end of the housing (1); The weak rotation sleeve (10) is rotationally connected to the inside of the other end of the housing (1) through a pedestal bearing (15); The outer isolation sleeve (11) is fixed between the fixed flange (12) and the pedestal bearing (15), and the strong conductive outer ring (4) and the weak conductive outer ring (5) are respectively fixed on both sides of the inner wall of the outer isolation sleeve (11); Among them, the strong conductive inner ring (2) is fixedly sleeved on the outside of the strong rotation sleeve (9), the weak conductive inner ring (3) is fixedly sleeved on the outside of the weak rotation sleeve (10), and the multi-layer shielding structure (8) is fixed between the strong rotation sleeve (9) and the weak rotation sleeve (10).

6. The strong and weak current isolation conductive slip ring according to claim 5, characterized in that: The inner wall of the inner ring of the ball bearing (13) is provided with a plurality of limiting grooves (1301) at equal circumferential intervals, and the outside of the strong rotation sleeve (9) is provided with a plurality of protrusions (901) at equal circumferential intervals, and the protrusions (901) are correspondingly matched with the limiting grooves (1301).

7. The strong and weak current isolation conductive slip ring according to claim 6, characterized in that: The outer surface of one end of the weak conductive inner ring (3) close to the pedestal bearing (15) is provided with a lower ring groove (304), the pedestal bearing (15) is sleeved in the lower ring groove (304), and there is a gap between the inner ring of the pedestal bearing (15) and the inner wall of the lower ring groove (304).

8. The strong and weak current isolation conductive slip ring according to claim 1, characterized in that: Both the first contact compensation device (6) and the second contact compensation device (7) include: The second brush holder (701´) is fixed to the inner wall of the strong conductive outer ring (4) or the weak conductive outer ring (5); The second carbon brush (702´) is in a "C" - shaped structure, the second carbon brush (702´) is fixed on the second brush holder (701´), and fifth conductive blocks (703´) are fixed on both the left and right sides of the two ends of the second carbon brush (702´); The elastic rod (704´) is fixedly connected between the inner walls of the second carbon brush (702´).

9. The strong and weak current isolation conductive slip ring according to claim 8, characterized in that: A plurality of annular second conductive chutes (301´) are provided on the outer wall of the strong conductive inner ring (2) or the weak conductive inner ring (3) along the length direction, and the two ends of the second carbon brush (702´) slide in the second conductive chutes (301´); A third positioning groove (302´) is opened on the opposite side of each adjacent two second conductive chutes (301´); During use, the elastic rod (704´) provides an elastic force to make the two sides of the second carbon brush (702´) fit against the inner wall of the second conductive chute (301´), and the fifth conductive block (703´) fits in the third positioning groove (302´).

10. The strong and weak current isolation conductive slip ring according to claim 1, characterized in that: It further includes a strong - power input line (16), a strong - power output line (17), a weak - power input line (18) and a weak - power output line (19); One end of the strong - power input line (16) passes through the through - holes on the weak rotation sleeve (10) and the strong rotation sleeve (9) and is fixed to the inner wall of the strong conductive inner ring (2); One end of the strong - power output line (17) is fixed to the strong conductive outer ring (4), and the other end of the strong - power output line (17) passes through the through - holes on the outer isolation sleeve (11) and the housing (1) and extends to the outside of the housing (1); One end of the weak - power input line (18) passes through the through - hole on the weak rotation sleeve (10) and is fixed to the weak conductive inner ring (3); One end of the weak current output line (19) is fixed to the weakly conductive outer ring (5), and the other end of the weak current output line (19) passes through the outer isolation sleeve (11) and the through hole on the shell (1) and extends to the outside of the shell (1).

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