Brush wire and conductive ring contact structure for micro conductive slip ring and conductive slip ring

Abstract

The application relates to a brush wire and conductive ring contact structure for a micro conductive slip ring and the conductive slip ring, which comprises a conductive ring and brush wires matched with the conductive ring. The brush wires are distributed in layers and at intervals along the conductive ring in the radial direction, so that the same conductive ring is in contact with the corresponding layer of brush wires at different positions in the radial direction. By changing the structure of the brush wires and the conductive ring of the conductive slip ring, the inner and outer double-row brush wire structures are designed without changing the installation space, the contact points between the brush wires and the conductive ring are increased, and the current carrying capacity and stability of the conductive slip ring are enhanced.

Description

Technical Field

[0001] This invention belongs to the field of electrical connector technology, specifically relating to a brush filament and conductive ring contact structure for a miniature conductive slip ring. Background Technology

[0002] Conductive slip rings are electrical connection devices used for power and signal transmission between two relatively rotating mechanisms. They have a wide range of applications, including aviation, aerospace, military, wind energy, and electronic automation, and have a promising market prospect.

[0003] like Figure 1-3 As shown, this is the structure of a conventional conductive slip ring. Its basic structure includes a rotating shaft 1, an end cap 2, a support frame 3, a brush system 4, a support bearing 5, an insulating ring 6, and a conductive ring 7. During operation, the end cap is fixed at the stationary end, the rotating shaft 1 rotates with the rotating components, and the brushes on the brush system 4 slide in contact with the conductive ring 7 on the rotating shaft 1, achieving stable transmission of current and signals.

[0004] Conventional conductive rings and brush bristles are usually matched by one brush bristle with one conductive ring. The same conductive ring only makes contact with the brush bristle at a certain radial position, resulting in fewer contact points between the conductive ring and the brush bristle, and insufficient current carrying capacity and stability. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a novel contact structure between the brush bristles and the conductive ring for a miniature conductive slip ring. By improving the arrangement of the brush bristles, this structure increases the contact points between the conductive ring and the brush bristles and enhances their contact stability.

[0006] The objective of this invention and the technical problem it solves are achieved by the following technical solution. According to this invention, a brush bristle contact structure for a miniature conductive slip ring includes a conductive ring and brush bristles that cooperate with the conductive ring. The brush bristles are distributed in layers at intervals along the radial direction of the conductive ring, such that different radial positions of the same conductive ring are in contact with corresponding layers of brush bristles for conduction.

[0007] The objectives of this invention and the technical problems it addresses can be further achieved by the following technical measures.

[0008] The aforementioned micro conductive slip ring uses a brush bristle and conductive ring contact structure. The outer periphery of the conductive ring is provided with a conductive groove for overlapping and engaging with the brush bristles. Different layers of the brush bristles overlap with the conductive groove at different positions in the radial direction of the conductive ring, and the bottom of the conductive groove extends downward to form a chip discharge groove for accommodating waste chips.

[0009] In the aforementioned micro conductive slip ring with brush filament contact structure, the extension length of the brush filament cross section along the axial direction of the conductive ring is less than the extension length along the radial direction of the conductive ring, so as to reduce the size of the conductive groove.

[0010] The aforementioned micro conductive slip ring uses a brush filament contact structure with the conductive ring, wherein the cross-section of the brush filament is elliptical.

[0011] The aforementioned micro conductive slip ring uses a brush bristle and conductive ring contact structure, wherein the conductive groove is V-shaped as a whole, the chip removal groove is located below the bottom of the V-shaped structure, and the two sides of the V-shape are, from bottom to top, a contact part for engaging with the brush bristles and an anti-skipping part for preventing the brush bristles from jumping out.

[0012] The aforementioned micro conductive slip ring uses a brush filament contact structure with the conductive ring, wherein the contact part is an inclined surface or a circular arc surface, and the anti-skipping part is a vertical surface.

[0013] The aforementioned micro conductive slip ring uses a brush filament contact structure with the conductive ring, wherein the contact part and the anti-slip part are integrally formed arc surfaces.

[0014] The objective of this invention and the solution to its technical problem are also achieved by the following technical solution. A through-hole conductive slip ring according to this invention includes a rotating shaft and any of the above-described brush bristle-conductive ring contact structures; the rotating shaft has a plurality of axially extending positioning ribs spaced circumferentially around its outer periphery; the inner wall of the conductive ring contacts the outer peripheral surface of the positioning ribs, and the conductive rings are separated by insulating rings; an adhesive for fixing the conductive rings and insulating rings is filled between adjacent positioning ribs.

[0015] The objectives of this invention and the technical problems it addresses can be further achieved by the following technical measures.

[0016] In the aforementioned conductive slip ring, an insulating strip is also fixed to the outer periphery of the positioning rib, and both the insulating ring and the inner wall of the conductive ring are in contact with the outer peripheral surface of the insulating strip.

[0017] The aforementioned conductive slip ring also has at least one wiring groove on the outer periphery of the rotating shaft, which is located between adjacent positioning ribs.

[0018] Compared with existing technologies, this invention has significant advantages and beneficial effects. Through the above technical solution, this invention achieves considerable technological advancement and practicality, and has broad industrial application value, possessing at least the following advantages:

[0019] This invention modifies the structure of the conductive slip ring brush bristles and the conductive ring, and designs an inner and outer double-row brush bristle structure without changing the installation space. This increases the contact points between the brush bristles and the conductive ring, and the contact part of the V-groove sidewall of the conductive ring is designed as an arc to improve contact stability. At the same time, a chip removal groove is set at the bottom of the conductive ring to facilitate the discharge of wear debris. Attached Figure Description

[0020] Figure 1 This is an existing micro-conductive slip ring structure;

[0021] Figure 2 This is a schematic diagram showing the contact between existing miniature conductive slip ring brush filaments and a conductive ring;

[0022] Figure 3 for Figure 2 A sectional view;

[0023] Figure 4 This is a schematic diagram of the contact between the micro conductive ring brush filaments and the conductive ring in an embodiment of the present invention;

[0024] Figure 5 This is a cross-sectional view of the contact between the micro conductive ring brush filament and the conductive ring in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the mandrel structure of a conductive slip ring according to another embodiment of the present invention;

[0026] Figure 7 for Figure 6 AA section view;

[0027] Figure 8 This is a cross-sectional view of a conductive ring according to another embodiment of the present invention.

[0028] [Explanation of Key Component Symbols]

[0029] 1: Rotating shaft

[0030] 11: Insulation positioning rib

[0031] 2: End cap

[0032] 3: Support frame

[0033] 4: Brush System

[0034] 5: Support bearing

[0035] 6: Insulating ring

[0036] 7: Conductive ring

[0037] 8: Brush bristles

[0038] 81: Inner layer bristles

[0039] 82: Outer layer bristles

[0040] 9: Conductive groove

[0041] 91: Chip Conveyor

[0042] 92: Sidewall

[0043] 921: Contact Department

[0044] 922: Anti-slip wire section Detailed Implementation

[0045] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description of the specific implementation, structure, features and effects of the miniature conductive slip ring proposed according to the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0046] Please see Figure 4-5 This is a schematic diagram of the structure of the miniature conductive slip ring of the present invention. The conductive slip ring includes a rotating shaft 1, a conductive ring 7, an insulating ring 6, and brush bristles 8 that cooperate with the conductive ring 6. The outer periphery of the conductive ring 6 is provided with a conductive groove 9 for cooperating with the brush bristles 8. The conductive groove 9 is generally V-shaped, and the bottom of the V-shaped conductive groove 9 extends downward to form a chip removal groove 91 for accommodating waste chips. Preferably, the chip removal groove 91 is U-shaped, but it is not limited to this. The chip removal groove 91 can not only discharge the abrasive chips generated between the brush bristles 8 and the conductive ring 7, preventing them from accumulating on the side wall of the conductive groove 9, but also ensure the contact stability between the brush bristles 8 and the conductive ring 7.

[0047] In this embodiment of the invention, the conductive groove 9 has two side walls 92 that are in contact with the brush bristles 8 in an arc-shaped structure to improve the contact force between the conductive groove 9 and the brush bristles 8. The arc-shaped side walls and the U-shaped chip removal groove 91 in this embodiment can increase the depth of the conductive groove 9 without increasing the radius of the arc, so as to simultaneously meet the contact and chip removal requirements.

[0048] In another embodiment of the present invention, please refer to Figure 8 The sidewall 92 of the conductive groove 9 includes, from bottom to top, a contact portion 921 for contacting the brush bristles 8 and an anti-bristle-jumping portion 922 for preventing the brush bristles from jumping out. The contact portion 921 is an inclined or arc-shaped surface for contacting the brush bristles 8, and the anti-bristle-jumping portion 922 is a vertical surface for preventing the brush bristles from detaching from the contact portion. This vertical surface extends radially along the conductive ring. This embodiment satisfies both chip removal and contact requirements while reducing the size of the conductive groove 9, and also meets the requirement of preventing bristle slippage, making the contact between the conductive groove 9 and the brush bristles 8 more stable and reliable.

[0049] In this embodiment of the invention, an annular conductive groove 9 is provided on the outer periphery of each conductive ring 7. Each conductive groove 9 is in contact with at least two brush filaments 8. The brush filaments 8 in the same conductive groove 9 are distributed radially at intervals along the conductive ring 7, that is, the transmission of electrical signals is achieved by the brush filaments 8 contacting different radial positions with the conductive groove 9. Preferably, there are two brush filaments 8 that overlap and cooperate with the same conductive groove 9, namely an inner brush filament 81 that overlaps on the side wall 92 of the conductive groove 9 and is closer to the bottom of the groove, and an outer brush filament 82 that is farther away from the bottom of the groove. This increases the number of contact points between the brush filaments and the conductive ring from two to four during the operation of the conductive slip ring, doubling the number. This enhances the current carrying capacity and transmission stability of the conductive slip ring without increasing the size of a single conductive ring 7 or the axial dimension of the conductive slip ring.

[0050] In this embodiment of the invention, the cross-sections of both the inner brush bristles 81 and the outer brush bristles 82 are elliptical, with the major axis of the inner brush bristles 82 being smaller than that of the outer brush bristles 82. This elliptical cross-section design reduces the radial dimension of the conductive groove 9 while ensuring contact between the brush bristles and the conductive groove 9. In other embodiments of the invention, the cross-sections of the inner brush bristles 81 and the outer brush bristles 82 may also be other shapes with an axial dimension greater than the radial dimension of the conductive ring 7, and the surface in contact with the conductive groove 9 is an arc surface to reduce friction.

[0051] In another embodiment of the present invention, the conductive slip ring is a through-hole type conductive slip ring. The rotating shaft 1 has a plurality of axially extending insulating positioning ribs 11 distributed circumferentially. The insulating ring 6 and the conductive ring 7 are both fixed to the outer periphery of the insulating positioning ribs 11, with the insulating ring 6 located between adjacent conductive rings 7 to achieve an insulating gap between adjacent conductive rings 7. A cavity 12 is formed between the inner walls of the insulating ring 6 and the conductive ring 7, the adjacent insulating positioning ribs 11, and the rotating shaft 1. This cavity 12 allows for wiring and is filled with adhesive to fix the insulating ring 6, the conductive ring 7, and the insulating strip 10 on the rotating shaft 1. In this embodiment, the insulating ring 6 only serves to isolate adjacent conductive rings 7, and its axial dimension is small, effectively reducing the axial dimension of the conductive slip ring and meeting the requirements of miniaturization. Furthermore, the conductive ring 7 and the insulating ring 6 are both fixed by potting adhesive, which effectively improves the stability of the conductive slip ring.

[0052] In this embodiment of the invention, at least one of the rotating shafts 1 at the bottom of the cavity 12 is provided with an axially extending cable routing groove 13 on its outer periphery, and the cables connected to the inner wall of the conductive ring 7 are distributed along the cable routing groove 13. After the cable routing groove 13 is completed, the cavity 12 is filled with glue to fix the conductive ring 7 and the insulating ring 6.

[0053] In this embodiment of the invention, an insulating strip 10 is also fixed on the insulating positioning rib 11, the insulating strip 10 completely covering the insulating positioning rib 11, and the inner walls of the insulating ring 6 and the conductive ring 7 are in contact with the insulating strip 11. In this embodiment, the insulating strip 11 has a U-shaped cross-section and is fitted onto the insulating positioning rib 11. Preferably, the insulating strip 11 is fixed to the insulating positioning rib by adhesive, but this is not a limitation.

[0054] In this embodiment of the invention, the contact points between the brush bristles and the conductive ring are doubled during operation. The sidewall of the V-groove adopts an arc structure, which improves the contact force between the brush bristles and the V-groove. A chip removal groove is set at the bottom of the V-groove, which facilitates the removal of wear debris generated between the brush bristles and the conductive ring during operation, preventing it from accumulating on the sidewall and affecting the contact stability between the brush bristles and the conductive ring.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A brush bristle contact structure for a miniature conductive slip ring, comprising a conductive ring and brush bristles that cooperate with the conductive ring, characterized in that: The bristles are distributed in layers at intervals along the radial direction of the conductive ring, so that different positions in the radial direction of the same conductive ring are in contact with the two sides of the corresponding layer of bristles and conduction. The outer periphery of the conductive ring is provided with conductive grooves for overlapping and engaging with both sides of the brush bristles. Different layers of the brush bristles overlap with the conductive grooves at different radial positions of the conductive ring, and the bottom of the conductive grooves extends downward to form a chip discharge groove for accommodating waste chips.

2. The brush filament and conductive ring contact structure for the miniature conductive slip ring according to claim 1, characterized in that: The length of the brush bristle cross section extending along the axial direction of the conductive ring is greater than the length extending along the radial direction of the conductive ring.

3. The brush filament and conductive ring contact structure for the miniature conductive slip ring according to claim 2, characterized in that: The cross-section of the brush bristles is elliptical.

4. The brush filament and conductive ring contact structure for the miniature conductive slip ring according to claim 2, characterized in that: The conductive groove is V-shaped, and the chip removal groove is located below the bottom of the V-shaped structure. The two sides of the V-shape are, from bottom to top, a contact part for contacting the brush bristles and an anti-bristle part for preventing the brush bristles from jumping out.

5. The brush bristle-conductive ring contact structure for a miniature conductive slip ring according to claim 4, characterized in that: The contact part is an inclined surface or a circular arc surface, and the anti-slip wire part is a vertical surface.

6. The brush filament and conductive ring contact structure for the miniature conductive slip ring according to claim 4, characterized in that: The contact part and the anti-slip wire part are integrally formed arc surfaces.

7. A through-hole type conductive slip ring, characterized in that: The device includes a rotating shaft and a brush bristle contact structure as described in any one of claims 1-6; the rotating shaft has a plurality of axially extending positioning ribs distributed circumferentially around its outer periphery, the inner wall of the conductive ring contacts the outer peripheral surface of the positioning ribs, and adjacent conductive rings are separated by insulating rings, and adhesive for fixing the conductive rings and insulating rings is filled between adjacent positioning ribs.

8. The conductive slip ring according to claim 7, characterized in that: An insulating strip is also fixed to the outer periphery of the positioning rib, and the inner walls of the insulating ring and the conductive ring are in contact with the outer peripheral surface of the insulating strip.

9. The conductive slip ring according to claim 7 or 8, characterized in that: The outer periphery of the rotating shaft is also provided with at least one wiring groove, which is located between adjacent positioning ribs.

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