Laminated conductive slip ring rotor structure and conductive slip ring

Abstract

The invention provides a laminated conductive slip ring rotor structure and a conductive slip ring, the laminated conductive slip ring rotor structure comprises a plurality of ring sheet units and a core shaft, the core shaft is sleeved with the plurality of ring sheet units, and the plurality of ring sheet units are stacked in sequence along the thickness direction; each ring piece unit comprises a ring piece, a first insulation piece, a shielding ring and a second insulation piece which are sequentially stacked in the thickness direction, and the diameter of the shielding ring is larger than that of the ring piece. According to the invention, the inter-ring isolation can be effectively improved, the signal interference is reduced, and the increase of the inter-ring distance is reduced as much as possible.

Description

Technical Field

[0001] The present invention relates to the technical field of conductive slip rings, and more particularly to a laminated conductive slip ring and a conductive slip ring. Background Art

[0002] Laminated slip rings are a type of rotary electrical connector that provides an electrical connection between two relatively rotating structures. A cable is connected to a core shaft assembly through a ring segment and other components at one end. A cable is connected to a bracket assembly through a brush and other components at the other end. The shaft and bracket assemblies rotate relative to each other, and the sliding contact between the ring segment and the brush segment enables signal transmission. Conductive slip rings typically utilize multi-channel transmission, meaning multiple cables and multiple ring segments transmit signals simultaneously within the slip ring.

[0003] Usually, each ring piece is a signal path, and the ring pieces are isolated by insulating materials. Each ring piece is connected to the cable core. When the cable transmits the signal, the induced charge accumulates on the surface of the ring piece, and there is an induced capacitance between the two ring pieces: Where, e 0—vacuum dielectric constant; eh— Relative dielectric constant of the insulating sheet between the ring pieces; A The overlapping area of ​​the ring segments; d— The distance between the rings.

[0004] It can be concluded that the larger the spacing between parallel rings, the smaller the capacitance, the smaller the electric field coupling, and the greater the isolation between rings. Therefore, increasing the ring spacing (ring thickness plus the thickness of the insulating sheet) can improve isolation. However, due to length limitations, the ring spacing of conductive slip rings is usually small, and each ring will significantly interfere with adjacent rings, affecting signal transmission. Summary of the Invention

[0005] (1) Technical issues to be resolved The technical problem to be solved by the present invention is that the ring spacing of the existing conductive slip ring is small, and each ring piece has a large interference with the adjacent ring pieces, which affects signal transmission.

[0006] (2) Technical solution To achieve the above object, the technical solution adopted by the present invention is: The first invention provides a laminated conductive slip ring rotor structure, comprising a plurality of ring sheet units and a core shaft, wherein the plurality of ring sheet units are sleeved on the core shaft and stacked in sequence along the thickness direction, wherein the ring sheet units comprise ring sheets, a first insulating sheet, a shielding ring and a second insulating sheet stacked in sequence along the thickness direction, wherein the diameter of the shielding ring is greater than the diameter of the ring sheet.

[0007] Preferably, the shielding ring is made of copper.

[0008] Preferably, it further comprises a plurality of cables, wherein the plurality of cables are electrically connected to the plurality of ring pieces in a one-to-one correspondence.

[0009] Preferably, the end surface of the first insulating sheet facing away from the core shaft is flush with the end surface of the shielding ring facing away from the core shaft.

[0010] Preferably, the end surface of the second insulating sheet facing away from the core shaft is flush with the end surface of the shielding ring facing away from the core shaft.

[0011] In a second aspect, the present invention further provides a conductive slip ring comprising a stator structure and a laminated conductive slip ring rotor structure according to any one of claims 1 to 5, wherein the laminated conductive slip ring rotor structure is rotatably connected to the stator structure.

[0012] Preferably, the stator structure includes a bracket and brush wires, the bracket has a receiving cavity, the brush wires are arranged on the inner wall of the receiving cavity, and the brush wires are in close contact with the ring sheet.

[0013] Preferably, it further comprises a brush filament lead-out wire, wherein the brush filament lead-out wire is electrically connected to the brush filament.

[0014] (3) Beneficial effects The above technical solution of the present invention has at least the following advantages: The shielding rings have excellent electrical conductivity, transmitting electromagnetic waves to themselves and reflecting them back, effectively blocking external electromagnetic interference. Each ring segment has two shielding rings at either end, and the height of the shielding rings is slightly higher than the height of the ring segments, forming a shielding canopy on both sides of the ring segments. The electromagnetic field amplitude is attenuated after passing through the shielding rings, effectively reducing electromagnetic interference. This structure utilizes eddy currents to reduce electromagnetic field penetration, eliminating the need for grounding the shielding rings and simplifying the structure. This invention effectively improves inter-ring isolation and reduces signal interference, while minimizing the increase in inter-ring spacing (ring segment thickness plus insulating sheet thickness). BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only 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.

[0016] Figure 1 It is a schematic structural diagram of a conductive slip ring provided by an embodiment of the present invention.

[0017] The reference numerals in the figures are: 1. Mandrel; 2. Ring; 3. First insulating sheet; 4. Shielding ring; 5. Second insulating sheet; 6. Cable; 7. Brush. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly located on the other element or indirectly located on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0020] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate that the device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating relative importance or the number of technical features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined. The following is a more detailed description of the specific implementation of the present invention in conjunction with specific embodiments: like Figure 1As shown, an embodiment of the present invention provides a laminated conductive slip ring rotor structure comprising a plurality of ring segments and a core shaft 1. The plurality of ring segments are sleeved on the core shaft 1 and stacked sequentially along the thickness direction. The ring segments comprise a ring segment 2, a first insulating segment 3, a shielding ring 4, and a second insulating segment 5, stacked sequentially along the thickness direction. The shielding ring 4 has a diameter greater than that of the ring segments 2. Specifically, the shielding ring 4 is made of a conductive material, preferably a material with good conductivity. Materials for the shielding ring 4 include, but are not limited to, gold, silver, and copper. In this embodiment, copper is preferably used for manufacturing cost considerations. The shielding ring 4 has excellent conductivity, transmitting electromagnetic waves to itself and reflecting them back, thereby effectively blocking external electromagnetic interference. Each ring segment 2 has two shielding rings 4 at each end, and the height of the shielding rings 4 is slightly higher than that of the ring segment 2, forming a shielding cover on both sides of the ring segment 2. The electromagnetic field is attenuated after passing through the shielding rings, effectively reducing electromagnetic interference. This structure utilizes eddy currents to reduce electromagnetic field penetration, so the shielding rings 4 do not need to be grounded, resulting in a simple structure. Since the larger the spacing between the ring segments, the smaller the capacitance, the smaller the electric field coupling, and the greater the isolation between the rings, the prior art generally increases the spacing between the ring segments to improve the isolation between the rings, which requires a longer core shaft to install multiple ring segments, and its length also limits the application scenarios of the slip ring. The present invention can effectively improve the isolation between the rings and reduce signal interference, while minimizing the increase in the ring spacing (ring segment thickness plus insulating sheet thickness), making the conductive slip ring smaller and improving its versatility. The first insulating sheet 3 and the second insulating sheet 5 are used to achieve axial insulation between two adjacent ring segments 2, and to achieve axial insulation between the shielding ring 4 and the ring segment 2. The radial insulation between the ring segment 2 and the core shaft 1 can be achieved by sleeved with an insulating sleeve on the core shaft 1, or by providing an insulating coating on the circumferential side wall of the core shaft 1.

[0022] In one embodiment, the system further comprises a plurality of cables 6, which are electrically connected to the plurality of ring pieces 2 in a one-to-one correspondence. The cables 6 are used to transmit electrical signals.

[0023] In one embodiment, the end face of the first insulating sheet 3 facing away from the core shaft 1 is flush with the end face of the shielding ring 4 facing away from the core shaft 1, or the end face of the first insulating sheet 3 facing away from the core shaft 1 is higher than the end face of the shielding ring 4 facing away from the core shaft 1, so as to ensure that the two ends of the shielding ring 4 can be insulated and isolated.

[0024] In one embodiment, the end face of the second insulating sheet 5 facing away from the core shaft 1 is flush with the end face of the shielding ring 4 facing away from the core shaft 1, or the end face of the second insulating sheet 5 facing away from the core shaft 1 is higher than the end face of the shielding ring 4 facing away from the core shaft 1, so as to ensure that the two ends of the shielding ring 4 can be insulated and isolated.

[0025] An embodiment of the present invention further provides a conductive slip ring, comprising a stator structure and any one of the laminated conductive slip ring rotor structures in the above embodiments, wherein the laminated conductive slip ring rotor structure is rotatably connected to the stator structure.

[0026] In one embodiment, the stator structure includes a bracket (not shown) and a brush 7 . The bracket has a receiving cavity. The brush 7 is disposed on the inner wall of the receiving cavity, and the brush 7 is in close contact with the ring sheet 2 .

[0027] In one embodiment, a brush filament lead-out wire is further included, and the brush filament lead-out wire is electrically connected to the brush filament.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A laminated conductive slip ring rotor structure, characterized in that: It includes multiple ring sheet units and a core shaft. The multiple ring sheet units are sleeved on the core shaft and stacked in sequence along the thickness direction. The ring sheet units include ring sheets, a first insulating sheet, a shielding ring and a second insulating sheet stacked in sequence along the thickness direction. The diameter of the shielding ring is larger than the diameter of the ring sheet.

2. The laminated conductive slip ring rotor structure according to claim 1, wherein: The shielding ring is made of copper.

3. The laminated conductive slip ring rotor structure according to claim 2, wherein: It also includes a plurality of cables, and the plurality of cables are electrically connected to the plurality of ring pieces in a one-to-one correspondence.

4. The laminated conductive slip ring rotor structure according to claim 1, wherein: The end surface of the first insulating sheet facing away from the core shaft is flush with the end surface of the shielding ring facing away from the core shaft.

5. The laminated conductive slip ring rotor structure according to claim 1, wherein: An end surface of the second insulating sheet facing away from the core shaft is flush with an end surface of the shielding ring facing away from the core shaft.

6. A conductive slip ring, characterized in that: The invention comprises a stator structure and a laminated conductive slip ring rotor structure according to any one of claims 1 to 5, wherein the laminated conductive slip ring rotor structure is rotatably connected to the stator structure.

7. The conductive slip ring according to claim 6, wherein: The stator structure includes a bracket and brush wires. The bracket has a receiving cavity. The brush wires are arranged on the inner wall of the receiving cavity, and the brush wires are in close contact with the ring sheet.

8. The conductive slip ring according to claim 7, wherein: It also includes a brush wire lead-out line, which is electrically connected to the brush wire.

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