Brush wire and conductive ring contact structure and conductive slip ring

Abstract

The invention belongs to the technical field of conductive slip rings, and particularly relates to a brush wire and conductive ring contact structure and a conductive slip ring, the conductive slip ring comprises the brush wire and conductive ring contact structure, a brush plate is fixed on a support frame, the conductive ring is fixed on a rotating shaft, the rotating shaft is rotatably arranged on the support frame, the rotating shaft rotates, and the brush wire and the conductive ring are in sliding contact. One end of the brush wire is a fixed end fixedly connected with the brush plate, the other end of the brush wire is a movable end used for being in contact with the conductive ring, and in the direction from the fixed end to the movable end, the brush wire extends towards one side of the edge of the brush plate and then extends towards the direction close to the peripheral surface of the conductive ring, so that the contact point is located on the semicircular arc surface of the side, away from the brush plate, of the conductive ring. By increasing the distance between the contact point and the fixed end, the assembly precision can be reduced, the assembly efficiency is further improved, meanwhile, it is guaranteed that the contact force is within the required range, abrasion aggravation caused by increase of the contact force is avoided, abrasive dust can be reduced, and stable transmission of signals and power can be guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of conductive slip rings, and in particular relates to a contact structure between a brush filament and a conductive ring and a conductive slip ring. Background Art

[0002] Conductive slip ring is an electrical connection device used for power and signal transmission between two relatively rotating mechanisms. It has a wide range of applications, including aviation, aerospace, military, wind energy, electronic automation and other fields, and has a good market prospect.

[0003] Conventional conductive slip rings such as Figures 1 to 3 As shown, the rotating shaft 1 is a hollow shaft, and the outer wall of both ends of the rotating shaft 1 is sleeved with support bearings 5, and the support bearings 5 ​​are nested in the support frame 3. A brush holder system 4 is fixedly arranged on the support frame 3, and an end cover 2 is arranged on one side of the support frame 3. The support frame 3, the brush holder system 4, and the shell 8 in the conductive slip ring can be fixed through the end cover 2; the brush holder system 4 includes a bracket fixed to the support frame 3 and used to fix power devices and signal devices such as printed circuit boards, and corresponding power devices and signal devices are fixedly arranged on the bracket as needed. A brush plate for fixing brush wires is also fixedly arranged on the bracket, and two rows of brush wires are distributed on the brush plate. One end of the brush wire is connected to the corresponding power device and signal device, and the other end extends to the rotating shaft 1 and contacts the outer circumference of the conductive ring 7 axially distributed on the rotating shaft 1. A brush wire is overlapped on both sides of the same conductive ring, and adjacent conductive rings 7 are separated by insulating rings 6. The insulating rings 6 and the conductive rings 7 rotate with the rotating shaft 1. The outer cover of the brush holder system 4 is provided with a shell 8, and the shell 8 is fixed on the support frame 3 to protect the conductive slip ring. The wire led out of the conductive ring 7 passes through the hollow rotating shaft 1 and is connected to the power device or signal device on the rotating part, while the brush wire is connected to the power device and signal device fixed on the brush holder system 4. The conductive ring 7 rotates and the brush wire maintains contact with the conductive ring 7, thereby realizing the transmission of power and signals between relatively rotating mechanisms.

[0004] At present, the structure of the conductive ring and brush wire contact in conventional micro conductive slip rings mostly adopts a V-groove structure. The outer circumference of the conductive ring is provided with a V-groove structure, and the brush wire is nested in the V-groove and contacts the side wall of the V-groove. When the conductive ring rotates, the brush wire and the side wall of the V-groove are in friction contact, which will cause certain wear and affect the product life. Moreover, when the conductive slip ring is used for a long time, the wear debris formed by the wear between the brush wire and the conductive ring is easy to adhere to the surface of the side wall of the V-groove structure. The wear debris attached to the side wall of the V-groove structure makes the surface of the side wall of the V-groove structure uneven. When the conductive ring rotates, the brush wire cannot maintain stable contact with the side wall of the V-groove structure, resulting in a decrease in the contact stability between the brush wire and the V-groove structure, thereby reducing the stability of signal and power transmission.

[0005] The length of the force arm of the brush wire is limited by the internal space of the conductive slip ring, and the force arm is relatively short. When the brush wire contacts the V-groove structure, a slight deformation will occur. Under the action of the brush wire's own elastic recovery force, the brush wire is crimped on the side wall of the V-groove structure, so that the brush wire and the side wall of the V-groove structure have contact force, thereby ensuring the firm contact between the brush wire and the conductive ring. In order to ensure that the brush wire and the side wall of the V-groove structure can be in stable contact, and at the same time reduce the wear of the V-groove structure and the brush wire, the contact force should not be too large or too small. When the contact force is too large, it is easy to increase the pressure between the brush wire and the V-groove structure, thereby increasing the wear between the brush wire and the V-groove structure when the conductive ring rotates; when the contact force is too small, the conductive ring is affected by the fluctuation of the external environment when rotating, or the interference of the wear debris on the side wall of the V-groove structure on the brush wire, which is easy to cause the brush wire to separate from the V-groove structure, thereby making the signal or power transmission unstable. The existing brush wire force arm is relatively short, that is, the distance between the active end of the brush wire that contacts the conductive ring and its fixed end is relatively small, and a small deformation of the active end of the brush wire will generate a large elastic restoring force. Therefore, when assembling the conductive slip ring, the assembly accuracy requirements of the brush wire and the conductive ring are relatively high to ensure that the deformation of the brush wire after the brush wire contacts the V-groove structure will not be too large, and then the contact force between the brush wire and the V-groove structure is within an appropriate range, avoiding large assembly errors between the brush wire and the conductive ring, and large deformation of the contact between the two, resulting in excessive pressure and excessive wear.

[0006] When assembling products, in order to ensure that the brush wire and the side wall of the V-groove structure can be firmly in contact to ensure signal and power transmission, the assemblers will make the brush wire too much biased to the inside of the V-groove structure. After assembly, the brush wire will be greatly deformed, which will easily cause the brush wire and the side wall of the V-groove structure to have a large contact force, even exceeding the allowable range of the contact force. In this case, when the conductive slip ring is running, the brush wire will be pressed against the side wall of the V-groove structure with a large force, resulting in large wear, which will affect the life of the product; at the same time, too much wear debris will be attached to the side wall of the V-groove, resulting in the brush wire and the conductive ring cannot be in stable contact. In order to avoid this situation, it is necessary to repeatedly adjust the assembly accuracy of the brush wire and the conductive ring so that the brush wire will not be greatly deformed when in contact with the conductive ring and have a certain contact force, which will easily reduce the assembly efficiency.

[0007] Moreover, as a cantilever structure with a certain elasticity, if the brush wire is too short, the contact end (active end) between the brush wire and the V-groove structure and the fixed end of the brush wire is too short, and the active end of the brush wire is relatively "hard". When it is subjected to fluctuations beyond the limit, it is easy to be permanently deformed, resulting in failure to stably contact the conductive ring. When the brush wire contacts the V-groove structure and the conductive ring rotates at high speed, the brush wire is disturbed by the wear debris on the side wall of the V-groove structure or the external environment, and the active end of the brush wire swings. The swing is more easily transmitted to the fixed end, causing the fixed end of the brush wire to deform and loosen, thereby affecting the connection between the brush wire and the signal or power device. In addition, when the brush wire is severely disturbed by the wear debris or the external environment, the brush wire itself has less buffering and is more likely to bounce up. Under the condition of the same contact force between the brush wire and the conductive ring, the shorter the brush wire, the more unstable the contact.

[0008] Therefore, it is an urgent problem to be solved within the industry to make structural improvements to the micro conductive slip rings, enhance the contact stability between the brush wires and the conductive rings, reduce wear and increase product life. Summary of the invention

[0009] In order to solve the above technical problems, the present invention provides a brush filament and conductive ring contact structure and a conductive slip ring.

[0010] The purpose of the present invention is to be achieved by adopting the following technical solutions. According to a brush wire and conductive ring contact structure proposed by the present invention, it includes a conductive ring and a brush wire in contact with the conductive ring, one end of the brush wire is a fixed end fixedly connected to a brush plate provided in a conductive slip ring, and the other end is a movable end for contacting the conductive ring, and in the direction from the fixed end to the movable end, the brush wire first extends toward the edge of the brush plate, and then extends toward the outer peripheral surface of the conductive ring, so that the contact point between the brush wire and the conductive ring is located on the semicircular arc surface of the conductive ring away from the brush plate, thereby increasing the distance between the contact point between the brush wire and the conductive ring and the fixed end of the brush wire.

[0011] Compared with the prior art, the advantages of the present technical solution are as follows: compared with the conventional structure, under the same installation size conditions, the length of the force arm of the brush wire is increased, and the contact stability is improved when the contact force between the brush wire and the conductive ring is the same; by increasing the distance between the contact point and the fixed end, the force arm is increased, and when the movable end of the brush wire undergoes a large deformation, the change range of the contact force is smaller, so that the assembly tolerance range between the brush wire and the conductive ring can be larger, that is, the assembly accuracy can be reduced, thereby improving the assembly efficiency, and at the same time ensuring that the contact force is within the required range; during assembly, in order to ensure that the contact force between the brush wire and the conductive ring meets the stable contact between the brush wire and the conductive ring during operation, The brush wire can be more inclined toward the conductive ring. Even if the brush wire and the conductive ring are greatly deformed when in contact, the contact force is still within a reasonable range, avoiding the aggravated wear caused by the increased contact force at this time, thereby reducing wear debris, ensuring stable transmission, and extending the service life of the conductive slip ring; and the brush wire has a longer force arm and a softer active end. When encountering a large impact, the brush wire basically undergoes elastic deformation and is not prone to plastic deformation. It can still maintain stable contact with the conductive ring and maintain stable signal and power transmission; and the brush wire has a long force arm and has a certain buffer, which has a small impact on the fixed end of the brush wire, which can ensure the fixing strength of the brush wire and stable connection with power and signal devices.

[0012] Furthermore, the brush filament is divided into a fixed section, a bending section, and a contact section in the direction from the fixed end to the movable end. The fixed section of the brush filament is passed through and fixed on the brush plate and extends vertically to the side away from the conductive ring. The bending section is first bent toward the edge in the width direction of the brush plate and extends horizontally, and then bent and extended toward the outer peripheral surface of the conductive ring, so that the bending section bypasses the edge of the brush plate, and the contact section extends from the bending section to the conductive ring and contacts the conductive ring.

[0013] Furthermore, a protrusion is provided on the side of the brush plate away from the conductive ring, and the fixed end of the brush filament is located on the end face of the protrusion. In the direction from the fixed end to the movable end of the brush filament, the brush filament first extends away from the brush plate, then extends toward the edge of the brush plate and bypasses the edge of the brush plate, and finally extends toward and contacts the outer circumference of the conductive ring.

[0014] Compared with the prior art, the advantages of this technical solution are: the lengthening of the brush wire force arm is realized at the fixed end of the brush wire, the space between the brush plate and the conductive slip ring is fully utilized, the force arm is lengthened without increasing the volume, and the contact stability between the brush wire and the conductive ring is increased.

[0015] Furthermore, the side of the brush plate is provided with a protrusion, and the fixed section of the brush wire is passed through and fixed on the brush plate and the protrusion.

[0016] Compared with the prior art, the advantage of this technical solution is that the fixed section of the brush filament is passed through and fixed in the holes of the brush plate and the protrusion, which can improve the positioning length, positioning accuracy and fixing strength of the brush filament and the brush plate.

[0017] Furthermore, the conductive ring contacts two brush filaments symmetrically arranged on the brush plate.

[0018] Compared with the prior art, the advantages of this technical solution are: the conductive ring contacts the two brush filaments, which increases the contact area between the conductive ring and the brush filaments and enhances the conductivity.

[0019] Furthermore, the outer circumference of the conductive ring is provided with an annular conductive groove, the cross-section of the conductive groove is V-shaped, the brush wire is nested in the conductive groove and contacts with the two side walls of the conductive groove; the side wall of the conductive groove is an outward convex arc, and the arc surface of the brush wire contacts with the outward convex arc.

[0020] Compared with the prior art, the benefits of the present technical solution are as follows: the contact structure is a contact of two convex surfaces, which reduces the closeness of the contact surface, ensures that the brush wire and the conductive slot are in contact through a stable working contact surface, and the distance between the surfaces other than the working contact surface is increased, so as to avoid the brush wire and the conductive slot from having bonding contact or air gap discharge on surfaces other than the working contact surface during rotation, thereby avoiding unstable signal and power transmission; at the same time, the contact area between the brush wire and the conductive slot remains stable compared with the prior art and will not increase during rotation, which can reduce friction, reduce the generation of wear debris, and thus reduce the wear debris attached to the side wall of the conductive slot, further improving the contact stability between the brush wire and the conductive ring; since the brush wire and the conductive slot are in convex contact, only the brush wire and the conductive slot are in contact, avoiding bonding and reducing the generation of wear debris. During the rotation of the conductive ring, the rotation flexibility of the conductive ring relative to the brush wire can be improved, the rotation resistance can be reduced, and the conductive ring can be changed more smoothly.

[0021] Furthermore, a chip removal groove is provided at the bottom of the conductive groove.

[0022] Compared with the prior art, the advantages of this technical solution are that: during operation, the wear debris formed by the friction between the brush wire and the side wall of the conductive slot flows into the chip discharge groove, which is conducive to the discharge of the wear debris and prevents the wear debris from accumulating and adhering to the side wall of the conductive slot, thereby enabling the brush wire to stably contact the side wall of the conductive slot.

[0023] Furthermore, the outer circumference of the conductive ring is provided with an annular anti-wire jumping groove, the two side walls of the anti-wire jumping groove are perpendicular to the outer circumference of the conductive ring, and the conductive groove is arranged at the bottom of the anti-wire jumping groove.

[0024] Compared with the prior art, the advantage of this technical solution is that the anti-wire jumping groove has a blocking effect on the brush wire, so that the conductive ring has the function of preventing wire jumping. In extreme cases, since the conductive groove is V-shaped as a whole, the brush wire can easily fall out of the conductive groove. The vertical anti-wire jumping groove on the side wall can prevent the brush wire from falling out of the conductive groove, making the contact between the conductive groove and the brush wire more stable and reliable.

[0025] A conductive slip ring comprises a brush filament and a conductive ring contact structure, wherein the brush plate is fixed on a support frame, and the conductive ring is fixed on a rotating shaft, which is rotatably arranged on the support frame. When the rotating shaft rotates, the brush filament and the conductive ring are in sliding contact.

[0026] Furthermore, one end of the brush filament is a fixed end fixedly connected to a brush plate provided in the conductive slip ring, and the other end is a movable end for contacting the conductive ring. In the direction from the fixed end to the movable end, the brush filament first extends toward the edge of the brush plate, and then extends toward the outer peripheral surface of the conductive ring, so that the contact point between the brush filament and the conductive ring is located on the semicircular arc surface of the conductive ring away from the brush plate, thereby increasing the distance between the contact point between the brush filament and the conductive ring and the fixed end of the brush filament.

[0027] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of a conventional micro conductive slip ring;

[0029] Figure 2 for Figure 1 Schematic diagram of the contact structure between the middle brush wire and the conductive ring;

[0030] Figure 3 for Figure 2 A cross-sectional view of

[0031] Figure 4 It is a schematic diagram of a first embodiment of a contact structure between a brush filament and a conductive ring of the present invention;

[0032] Figure 5 for Figure 4 A cross-sectional view of

[0033] Figure 6 It is a cross-sectional view of a second embodiment of a contact structure between a brush filament and a conductive ring of the present invention;

[0034] Figure 7 This is a cross-sectional view of a sixth embodiment of a contact structure between brush filaments and a conductive ring according to the present invention.

[0035] [Reference Signs]

[0036] 1- Rotation axis,

[0037] 2- End cap,

[0038] 3- Support frame,

[0039] 4-Brush holder system,

[0040] 401-brush wire, 4011-fixed section, 4012-bending section, 4013-contact section,

[0041] 402-brush plate, 4021-protrusion,

[0042] 403-edge,

[0043] 5- Support bearing,

[0044] 6-Insulation ring,

[0045] 7- Conductive ring,

[0046] 701-V-shaped groove, 702-outer convex arc, 703-drainage groove, 704-conductive groove, 705-anti-wire jumping groove, 706-first semicircular arc, 707-second semicircular arc,

[0047] 8- Shell. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0049] Embodiment 1 of a conductive slip ring of the present invention, as Figures 4 to 5 As shown. The present invention is improved on the basis of the existing conventional micro conductive slip ring. The present invention mainly improves the structure of the brush wire, brush plate, conductive ring and their matching structure. The remaining structures are consistent with the prior art and will not be repeated here. The present invention improves the contact structure between the brush wire and the conductive ring to improve the contact stability between the brush wire and the conductive ring, thereby improving the stability of signal and power transmission, while reducing wear and prolonging the service life of the product.

[0050] In the existing micro conductive slip ring, the brush plate 402 in the brush system 4 is arranged with two rows of brushes 401 facing one side of the rotating shaft 1, and the two rows of brushes 401 are symmetrically arranged on both sides of the rotating shaft 1, and each conductive ring 7 is in contact with two brushes 401 on both sides. The outer circumference of the conductive ring 7 is provided with an annular V-shaped groove 701, and the brush 401 is limited in the V-shaped groove 701 and contacts the two side walls of the V-shaped groove 701. After the brush 401 contacts the side wall of the V-shaped groove 701, it elastically deforms and warps outwards, and exerts a certain pressure on the side wall of the V-shaped groove 701 under its own restoring force to ensure the stable contact between the brush 401 and the conductive ring 7.

[0051] In an embodiment of the present invention, one of the conductive rings 7 and the corresponding brush filaments 401 is taken as an example for description, that is, the conductive ring 7 and the corresponding brush filaments 401 in the same radial section of the rotating shaft 1 are taken as an example for description, and the remaining conductive rings 7 and the corresponding brush filaments 401 are distributed along the axial direction of the rotating shaft 1 and are parallel to the conductive rings 7 and the brush filaments 401 on the radial section.

[0052] In this embodiment, two brush filaments 401 are correspondingly arranged for each conductive ring 7, and the two brush filaments 401 are symmetrically arranged about the Y axis. The fixed end of the brush filament 401 is arranged on the outer side of the brush plate 402 away from the rotating shaft 1, and the brush filament 401 is divided into a fixed section 4011, a bending section 4012, and a contact section 4013 in the direction from the fixed end to the movable end. A protrusion 4021 is arranged on the outer side of the brush plate 402, and the fixed section 4011 of the brush filament 401 is passed through and fixed in the holes of the brush plate 402 and the protrusion 4021, which can improve the positioning length, positioning accuracy and fixing strength of the brush filament 401 and the brush plate 402. The fixed section 4011 of the brush filament 401 is fixed inside the brush plate 402 and the protrusion 4021 and extends vertically outward, and then is bent to form a bent section 4012. The bent section 4012 is first bent toward the edge 403 in the width direction of the brush plate 402 and extends horizontally (the length direction of the brush plate 402 is the stacking distribution direction of the conductive ring 7), and then is bent and extended toward one side of the conductive ring 7, so that the bent section 4012 bypasses the edge 403 of the brush plate 402, extends from the bent section 4012 to the conductive ring 7 and contacts with the conductive ring 7, forming a contact section 4013. The radial straight line (i.e., X-axis) passing through the center of the conductive ring 7 and parallel to the brush plate 402 divides the conductive ring 7 into a first semicircular arc 706 away from the brush plate 402 and a second semicircular arc 707 toward the brush plate 402. Since the brush wire 401 extends toward the conductive ring 7 and contacts the conductive ring 7 after bypassing the brush plate 402, the contact point between the brush wire 401 and the conductive ring 7 can be located on one side of the first semicircular arc of the conductive ring 7, and the distance between the contact point and the fixed end of the brush wire can be increased. The brush wire 401 makes full use of the space between the brush plate 402 and the housing 8 of the conductive slip ring, so that the brush wire 401 first extends in a direction away from the conductive ring 7, and then the brush wire 401 is in a bent structure, bypasses the outer edge 403 of the brush plate 402, and contacts the first semicircular arc 706 of the conductive ring 7. Under the premise of not changing the overall volume of the conductive slip ring, the force arm length of the brush wire 401 can be increased.

[0053] The conventional micro conductive slip ring brush wires extend directly toward and contact the conductive ring according to the conventional design. Since the fixed end of the brush wire 401 is located on the inner side of the brush plate 402, and the contact position with the conductive ring 7 is located on the second semicircular arc 707 of the conductive ring 7, the brush wire force arm is short. The present invention increases the force arm length of the brush wire 401 by extending the brush wire in the reverse direction and contacting the first semicircular arc 706 of the conductive ring, that is, increases the distance between the contact section 4013 of the brush wire 401 and the fixed end. For the same elastic cantilever structure, the movable end undergoes the same elastic deformation. The closer the distance between the movable end and the fixed end, the greater the force required, and accordingly, the greater the elastic restoring force; the farther the distance between the movable end and the fixed end, the smaller the force required, and accordingly, the smaller the elastic restoring force. When the contact segment 4013 of the brush filament 401 contacts the conductive ring 7 and undergoes a large deformation, due to the large length of the force arm of the brush filament and the increase in the distance between the movable end and the fixed end of the force arm, the pressure of the contact segment 4013 on the side wall of the V-shaped groove on the outer circumference of the conductive ring 7 is much smaller than the pressure corresponding to the same deformation of the existing brush filament 401. That is, when the brush filament 401 is assembled with the conductive ring 7, in order to make the brush filament 401 in stable contact with the conductive ring 7 and not prone to wear, a smaller range of contact force (higher requirements on the accuracy of the contact force) is required between the brush filament 401 and the conductive ring 7. By using a larger force arm (a larger force arm can make a smaller range of contact force of the brush filament correspond to a larger deformation range of the brush filament), the assembly tolerance range between the brush filament 401 and the conductive ring 7 can be made larger, that is, the assembly accuracy can be reduced, thereby improving the assembly efficiency. During assembly, in order to ensure that the contact force between the brush wire 401 and the conductive ring 7 meets the stable contact between the brush wire 401 and the conductive ring 7 during operation, the brush wire 401 can be more biased toward the conductive ring 7. Even if the brush wire 401 is greatly deformed when in contact with the conductive ring 7, the contact force is still within a reasonable range, avoiding the increased wear caused by the increased contact force at this time, thereby reducing the wear debris, ensuring stable transmission, and extending the service life of the conductive slip ring. In addition, the brush wire 401 has a long force arm and a softer active end. When encountering a large impact (for example, when the conductive slip ring is started), the brush wire 401 basically undergoes elastic deformation and is not prone to plastic deformation. It can still maintain stable contact with the conductive ring and maintain stable signal and power transmission; and the brush wire 401 has a long force arm and has a certain buffer, which has a small impact on the fixed end of the brush wire 401, which can ensure the fixing strength of the brush wire 401 and stable connection with power and signal devices.

[0054] An annular conductive groove 704 is provided on the outer circumference of the conductive ring 7, and the brush wire 401 is nested in the conductive groove 704 and contacts the two side walls of the conductive groove 704. The conductive groove 704 is improved on the basis of the V-shaped groove, and is V-shaped as a whole, and both side walls are convex arcs 702, so that the side walls of the conductive groove 704 are first raised and then lowered in the direction from the opening to the bottom compared with the existing V-shaped groove side walls, so that the two side walls of the conductive groove 704 are relatively convex, and the brush wire 401 contacts the convex arc 702. The cross section of the brush wire 401 is circular, and the contact is the contact of two convex surfaces, which reduces the closeness of the contact surface, ensures that the brush wire 401 and the conductive groove 704 are in contact through a stable working contact surface (the working contact surface that normally transmits power and signals between the brush wire 401 and the conductive ring 7), and the distance between the surfaces other than the working contact surface is increased, so as to avoid the brush wire 401 and the conductive groove 704 from rotating except for the working contact surface. The surfaces other than the contact surface produce bonding contact or air gap discharge, thereby avoiding unstable signal and power transmission; at the same time, the contact area between the brush wire 401 and the conductive groove 704 remains stable compared with the prior art, and will not increase during the rotation process, which can reduce friction, reduce the generation of wear debris, and thus reduce the wear debris attached to the side wall of the conductive groove 704, and further improve the contact stability between the brush wire 401 and the conductive ring 7; because the brush wire 401 and the conductive groove 704 are in convex contact, only the brush wire 401 and the conductive groove 704 are in contact, avoiding bonding and reducing the generation of wear debris. During the rotation of the conductive ring 7, the rotation flexibility of the conductive ring 7 relative to the brush wire 401 can be improved, the rotation resistance can be reduced, and the conductive ring can be changed more smoothly. A chip groove 703 is provided at the bottom of the conductive groove 704. The chip groove 703 is U-shaped or in other shapes. The chip groove 703 is connected to the conductive groove 704 and extends toward the center of the guide ring 7. During operation, wear debris formed by the friction between the brush filament 401 and the side wall of the conductive groove 704 flows into the chip groove 703, which is conducive to the discharge of wear debris and avoids the accumulation of wear debris and adhesion to the side wall of the conductive groove 704, thereby enabling the brush filament 401 to stably contact the side wall of the conductive groove 704.

[0055] In summary, compared with the conventional structure, under the same installation size conditions, the conductive slip ring increases the length of the force arm of the brush 401 by changing the structure of the brush 401 and the conductive ring 7. When the contact force between the brush 401 and the conductive ring 7 is the same, the contact stability is improved, and when the brush 401 undergoes a large deformation, the contact force still meets the requirements, the assembly accuracy requirement is not high, and the assembly efficiency is improved; a convex structure is used on the brush plate 402 to fix the brush 401, and the matching length of the brush 401 and the brush plate 402 is increased, thereby improving its positioning accuracy and fixing strength; the side wall of the conductive groove 704 adopts an outward convex arc structure, and the contact between the brush 401 and the conductive ring 7 is a convex contact, which reduces the closeness of the contact surface, reduces friction, and improves contact stability and rotation flexibility; a chip removal groove 703 is provided at the bottom of the conductive groove 704, which is conducive to the discharge of wear debris generated between the brush 401 and the conductive ring 7 during operation, so that it is not deposited on the side wall, thereby avoiding affecting the contact stability between the brush 401 and the conductive ring 7.

[0056] In the second embodiment of a conductive slip ring of the present invention, Figure 6 As shown, an anti-wire jumping groove 705 is provided on the outer side of the conductive groove 704, the bottom of the anti-wire jumping groove 705 is connected to the top of the conductive groove 704, the opening of the anti-wire jumping groove 705 is located on the outer circumference of the conductive ring 7, and the side wall of the anti-wire jumping groove 705 is perpendicular to the outer circumference of the conductive ring 7, which has a blocking effect on the brush wire 401, so that the conductive ring 7 has the function of preventing wire jumping. In extreme cases, since the conductive groove 704 is V-shaped as a whole, the brush wire 401 is easy to escape from the conductive groove 704. The anti-wire jumping groove 705 with a vertical side wall can prevent the brush wire 401 from escaping from the conductive groove 704, so that the contact between the conductive groove 704 and the brush wire 401 is more stable and reliable.

[0057] In the third embodiment of a conductive slip ring of the present invention, the chip removal groove 703 can be eliminated, the depth of the conductive groove 704 can be increased, and the bottom space of the conductive groove 704 can be used to accommodate the wear chips.

[0058] In a fourth embodiment of a conductive slip ring of the present invention, the fixed section 4011 of the brush filament 401 can be set tilted, with the tilting direction toward the symmetry axis of the two rows of brush filaments 401, and then bend and extend toward the edge 403 of the brush plate 402, or the number of bending times and the bending shape of the bending section 4012 are not limited, so that the brush filament 401 extends in a direction away from the conductive ring and then bends multiple times to bypass the edge 403 of the brush plate 402 and then contact the conductive ring 7.

[0059] In the fifth embodiment of a conductive slip ring of the present invention, the fixed end of the brush filament 401 as a cantilever structure is located on the end face of the protrusion 4021, which can increase the height of the protrusion 4021 protruding away from the conductive ring 7, further increase the distance between the fixed end of the brush filament and the contact point, and increase the length of the force arm. In order to further increase the fixing strength of the brush filament 401, a protrusion can be provided on the side of the brush plate 402 facing the conductive ring 7, and the fixed section 4011 of the brush filament 401 is passed through and fixed on the brush plate 402 and the protrusions on both sides.

[0060] In the sixth embodiment of a conductive slip ring of the present invention, the contact point between the brush filament 401 and the conductive ring 7 can be made as far away from the brush plate 402 as possible to increase the lever arm. Specifically, the length between the two bending points of the bending section 4012 can be increased, and the space on the side of the conductive ring 7 where the brush plate is not installed can be fully utilized to make the contact section 4013 as far away from the edge 403 of the brush plate 402 as possible, and reduce the angle between the contact section 4013 and the brush plate 402, so that the contact point between the brush filament 401 and the conductive ring 7 is away from the fixed end to increase the lever arm, such as Figure 7 As shown, if the diameter of the conductive ring is large, the length of the bending section 4012 can be increased accordingly to make the contact point away from the fixed end of the brush wire.

[0061] In the seventh embodiment of a conductive slip ring of the present invention, the brush filament 401 can also be fixed on the side of the brush plate 402 facing the conductive ring 7. After the brush filament 401 extends out of the brush plate 402, it bends and extends toward the edge 403 of the brush plate 402, that is, it extends in the direction away from the conductive ring 7, and then bends and extends toward the side close to the conductive ring 7, so that the contact point is located on the first semicircular arc 706 of the conductive ring 7, which can also increase the force arm of the brush filament.

[0062] An embodiment of a contact structure between brush filaments and a conductive ring of the present invention includes the structure of the conductive ring 7 in the conductive slip ring, the brush holder system 4 and the matching structure of the two, which will not be described in detail here.

[0063] Although 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 the 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 brush filament and conductive ring contact structure, comprising a conductive ring (7), a brush filament (401) in contact with the conductive ring, Features: One end of the brush wire (401) is a fixed end fixedly connected to a brush plate (402) provided in a conductive slip ring, and the other end is a movable end for contacting a conductive ring (7). In the direction from the fixed end to the movable end, the brush wire (401) first extends toward an edge (403) of the brush plate (402), and then extends toward an outer peripheral surface close to the conductive ring (7), so that the contact point between the brush wire (401) and the conductive ring (7) is located on a semicircular arc surface of the conductive ring (7) on a side away from the brush plate (402).

2. A brush filament and conductive ring contact structure according to claim 1, Features: The brush wire (401) is divided into a fixed section (4011), a bent section (4012), and a contact section (4013) in sequence from the fixed end to the movable end. The fixed section (4011) of the brush wire (401) is fixed on the brush plate (402) and extends vertically to a side away from the conductive ring. The bent section (4012) is first bent toward an edge (403) in the width direction of the brush plate (402) and extends horizontally, and then bent and extended toward the outer peripheral surface of the conductive ring (7), so that the bent section (4012) bypasses the edge (403) of the brush plate (402). The contact section (4013) extends from the bent section (4012) toward the conductive ring (7) and contacts the conductive ring (7).

3. A brush filament and conductive ring contact structure according to claim 1, Features: A protrusion (4021) is provided on the side of the brush plate (402) away from the conductive ring (7); the fixed end of the brush wire (401) is located on the end surface of the protrusion (4021); in the direction from the fixed end to the movable end of the brush wire (401), the brush wire (401) first extends in a direction away from the brush plate (402), then extends toward the edge (403) of the brush plate (402) and bypasses the edge (403) of the brush plate (402), and finally extends toward the outer circumference of the conductive ring (7) and contacts it.

4. The contact structure between brush filaments and conductive rings according to claim 1, Features: A protrusion (4021) is provided on the side of the brush plate (402), and a fixed section (4011) of the brush wire (401) is passed through and fixed on the brush plate (402) and the protrusion (4021).

5. A brush filament and conductive ring contact structure according to any one of claims 1 to 4, Features: The conductive ring (7) is in contact with two brush filaments symmetrically arranged on the brush plate (402).

6. A brush filament and conductive ring contact structure according to claim 1, Features: An annular conductive groove (704) is provided on the outer circumference of the conductive ring (7); the cross section of the conductive groove (704) is V-shaped; the brush wire (401) is nested in the conductive groove (704) and in contact with two side walls of the conductive groove (704); The side wall of the conductive groove (704) is an outwardly convex arc (702), and the arc surface of the brush filament (401) is in contact with the outwardly convex arc (702).

7. A brush filament and conductive ring contact structure according to claim 6, Features: A chip removal groove (703) is provided at the bottom of the conductive groove (704).

8. A brush filament and conductive ring contact structure according to claim 6, Features: The outer circumference of the conductive ring (7) is provided with an annular anti-wire jumping groove (705), the two side walls of the anti-wire jumping groove (705) are perpendicular to the outer circumference of the conductive ring (7), and the conductive groove (704) is arranged at the bottom of the anti-wire jumping groove (705).

9. A conductive slip ring, Features: It comprises a brush filament and conductive ring contact structure as described in any one of claims 1 to 8, wherein the brush plate (402) is fixed on a support frame (7), the conductive ring (7) is fixed on a rotating shaft (1), the rotating shaft (1) is rotatably arranged on the support frame (3), and when the rotating shaft (1) rotates, the brush filament (401) and the conductive ring (7) are in sliding contact.

10. A conductive slip ring according to claim 9, Features: One end of the brush wire (401) is a fixed end fixedly connected to a brush plate (402) provided in a conductive slip ring, and the other end is a movable end for contacting a conductive ring (7). In the direction from the fixed end to the movable end, the brush wire (401) first extends toward an edge (403) of the brush plate (402), and then extends toward an outer peripheral surface close to the conductive ring (7), so that the contact point between the brush wire (401) and the conductive ring (7) is located on a semicircular arc surface of the conductive ring (7) on a side away from the brush plate (402).

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