CN217823645U

CN217823645U - Slip ring with high isolation

Info

Publication number: CN217823645U
Application number: CN202221383952.2U
Authority: CN
Inventors: 蔡益军
Original assignee: SHENZHEN JINPAT ELECTRONICS CO Ltd
Current assignee: SHENZHEN JINPAT ELECTRONICS CO Ltd
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2022-11-15
Anticipated expiration: 2032-06-02

Abstract

The utility model relates to the technical field of conductive slip rings, and discloses a slip ring with high isolation, which comprises a rotor and a stator, wherein a main shaft sleeve of the rotor is provided with at least three shielding rings and a plurality of conductive rings, and the conductive rings are positioned between two adjacent shielding rings to form at least two groups of signal channels; the stator support is provided with a flexible conductive piece made of flexible conductive material, and the peripheral surface of the shielding ring is in contact conduction with the flexible conductive piece. The flexible conductive piece is in surface contact with the shielding ring, and compared with the traditional brush wire, the flexible conductive piece can be only connected with two points on the shielding ring, the wear resistance and the sealing performance of each group of signal channels are enhanced, the isolation degree of the slip ring is improved, and the service life and the reliability of the slip ring are prolonged.

Description

Slip ring with high isolation

Technical Field

The utility model relates to a lead electrical slip ring technical field, more specifically say, relate to a sliding ring of high isolation.

Background

With the wide application of medium-high frequency signals in radar communication, shield tunneling machines, industrial automation, video and other application fields, the requirement on the isolation of the medium-high frequency signals of the conductive slip ring is gradually increased.

The current conductive slip ring is generally provided with brush wires at the stator, and the brush wires are connected with the shielding ring to keep the rotor shielding ring and the stator in conduction. Because the brush wire can only be connected with two points on the shielding ring, an independent closed cavity cannot be formed, the isolation degree is poor, and the multi-channel medium-high frequency signal is poor in anti-interference performance and poor in signal transmission.

Meanwhile, the brush wire is in point contact with the shielding ring, so that the wear resistance of the brush wire is poor, the conduction effect is reduced after the brush wire works for a period of time, and the isolation degree is further reduced.

In summary, how to improve the isolation of each channel of the slip ring rotor is a problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a sliding ring of high isolation, stator support and shield ring are conducted through the contact of flexible conductive piece, have improved the isolation of signal, the life-span and the reliability of sliding ring.

In order to achieve the above object, the present invention provides the following technical solutions:

a slip ring with high isolation comprises a rotor and a stator, wherein a main shaft sleeve of the rotor is provided with at least three shielding rings and a plurality of conducting rings, and the conducting rings are positioned between every two adjacent shielding rings to form at least two groups of signal channels;

and a flexible conductive piece made of a flexible conductive material is arranged on the bracket of the stator, and the peripheral surface of the shielding ring is in contact conduction with the flexible conductive piece.

Preferably, the flexible conductive member includes a flexible conductive ring disposed around an outer circumferential surface of the shielding ring.

Preferably, the flexible conductive ring is connected to the bracket by a fastening screw.

Preferably, the inner circumferential surface of the flexible conductive ring is a circumferential surface, and the thickness of the flexible conductive ring is the same as that of the shielding ring.

Preferably, the outer diameter of the shielding ring is larger than the outer diameter of the conductive ring.

Preferably, the conductive ring and the shielding ring are both H62 brass rings.

The utility model provides a sliding ring of high isolation is equipped with flexible electrically conductive piece between the support of stator and shield ring, and flexible electrically conductive piece is the face contact between with the shield ring, compare in traditional brush line only with shield ring on two point connections, the leakproofness of wearability and each group signal channel strengthens, has improved the isolation of sliding ring, is favorable to prolonging the life-span and the reliability of sliding ring.

Preferably, the flexible conductive piece can be set to be a flexible conductive ring which is arranged around the peripheral surface of the shielding ring in a whole circle, and the flexible conductive ring can divide each group of signal channels into independent closed cavities, so that the isolation of the slip ring is greatly improved, and the mutual interference of signals of each group of signal channels is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a specific embodiment of the high-isolation slip ring provided by the present invention.

In FIG. 1:

11 is a main shaft, 12 is a bearing, 21 is an end cover, 22 is a support, 23 is an outer sleeve, 3 is a shielding ring, 4 is a conducting ring, 5 is an isolating ring, 6 is an insulating sheet, 7 is a flexible conducting ring, and 8 is a brush wire.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

The core of the utility model is to provide a sliding ring of high isolation, stator support and shield ring are through the contact conduction of flexible electrically conductive piece, have improved life-span and the reliability of isolation, sliding ring of signal.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a slip ring with high isolation according to an embodiment of the present invention.

The utility model provides a slip ring with high isolation, which comprises a rotor and a stator, wherein a main shaft 11 of the rotor is sleeved with at least three shielding rings 3 and a plurality of conducting rings 4, and the conducting rings 4 are positioned between two adjacent shielding rings 3 to form at least two groups of signal channels;

the stator support 22 is provided with a flexible conductive member made of a flexible conductive material, and the outer peripheral surface of the shielding ring 3 is in contact conduction with the flexible conductive member.

Referring to fig. 1, a rotor of the slip ring includes a main shaft 11 and bearings 12 sleeved at two ends of the main shaft 11, at least three shielding rings 3 and a plurality of conducting rings 4 are sleeved between the bearings 12 at the two ends of the main shaft 11, and the conducting rings 4 are located between two adjacent shielding rings 3 to form at least two groups of signal channels;

isolation rings 5 are arranged between two adjacent conducting rings 4, between two adjacent shielding rings 3 and between the adjacent conducting ring 4 and the shielding ring 3, the isolation rings 5 are tightly attached to the main shaft 11 to be kept in conduction, and an insulation sheet 6 is arranged between the conducting ring 4 and the isolation ring 5 to improve the inter-ring insulation and voltage resistance performance of the conducting ring 4;

the stator of the slip ring comprises an outer sleeve 23, end covers 21 used for fixing the bearings 12 at two ends and a support 22 arranged between the end covers 21 at two sides, the support 22 is provided with a brush wire mounting hole used for mounting the brush wire 8, and the brush wire 8 is used for being in contact conduction with the conducting ring 4.

The specific number and arrangement of the shielding rings 3 and the conducting rings 4, the material, shape and size of the isolating rings 5 and the insulating sheets 6, and the material, structure, shape, size and connection mode of the main shaft 11, the bearing 12, the end cover 21, the support 22, the outer sleeve 23 and the like are determined according to the actual production requirements by referring to the prior art, and are not described herein again.

The bracket 22 is provided with a flexible conductive member, the flexible conductive member is made of flexible conductive materials such as conductive films, conductive rubber, conductive plastics, conductive printing materials and conductive textiles, and the specific material of the flexible conductive member is determined according to the actual production requirement, which is not described herein again.

The flexible conductive piece is in contact conduction with the outer peripheral surface of the shielding ring 3, the flexible conductive piece can be a whole circle of flexible conductive ring 7 or one or more sections of flexible conductive arcs, and the inner diameter of the flexible conductive ring 7 and the inner diameter of the flexible conductive arcs are smaller than or equal to the outer diameter of the shielding ring 3, so that the flexible conductive piece and the shielding ring 3 are always kept in a contact state.

In this embodiment, the flexible conductive member is disposed between the bracket 22 of the stator and the shielding ring 3, and the flexible conductive member is in surface contact with the shielding ring 3, compared with the conventional brush wire 8 which can be connected to two points on the shielding ring 3, the abrasion resistance and the sealing performance of each group of signal channels are enhanced, the isolation degree of the slip ring is improved, and the service life and the reliability of the slip ring are prolonged.

In order to reduce signal crosstalk between the signal channels of each group and improve the isolation of the slip ring, the outer diameter of the shielding ring 3 is generally larger than the outer diameter of the conductive ring 4.

Preferably, the conducting ring 4 and the shielding ring 3 can be both set to be H62 brass rings, so that the conducting performance is good, and the wear resistance and the corrosion resistance of the ring path are good, which is beneficial to prolonging the service life of the slip ring.

On the basis of the above embodiment, the flexible conductive member includes the flexible conductive ring 7 disposed around the entire outer circumferential surface of the shielding ring 3. The flexible conducting ring 7 can divide each group of signal channels into independent closed cavities, so that the isolation degree of the sliding ring is greatly improved, and the mutual interference of signals of each group of signal channels is avoided.

In order to enhance the connection strength between the flexible conductive ring 7 and the bracket 22, it is preferable that the flexible conductive ring 7 is connected to the bracket 22 by a fastening screw to ensure connection and conduction between the two.

Of course, it is also possible to replace the fastening screws with connecting elements with similar functions, such as pins.

Preferably, the inner circumferential surface of the flexible conductive ring 7 may be set as the inner circumferential surface, and the thickness of the flexible conductive ring 7 is the same as that of the shielding ring 3, so as to simplify the structure of the flexible conductive ring 7 and facilitate the processing of the flexible conductive ring 7.

Of course, one of the outer peripheral surface of the shielding ring 3 and the inner peripheral surface of the flexible conductive ring 7 may be provided with a limiting protrusion, and the other may be provided with a limiting groove in snap fit with the limiting protrusion.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

It is right above that the utility model provides a slip ring of high isolation has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above description of the embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the scope of the appended claims.

Claims

1. The slip ring with high isolation comprises a rotor and a stator and is characterized in that a main shaft (11) of the rotor is sleeved with at least three shielding rings (3) and a plurality of conducting rings (4), and the conducting rings (4) are positioned between every two adjacent shielding rings (3) to form at least two groups of signal channels;

and a flexible conductive piece made of a flexible conductive material is arranged on a bracket (22) of the stator, and the peripheral surface of the shielding ring (3) is in contact conduction with the flexible conductive piece.

2. High isolation slip ring according to claim 1, characterized in that the flexible conducting member comprises a flexible conducting ring (7) arranged around the outer circumference of the shielding ring (3) in a full turn.

3. High isolation slip ring according to claim 2, wherein the flexible conductive ring (7) is connected to the bracket (22) by means of fastening screws.

4. High isolation slip ring according to claim 2, characterized in that the inner circumferential surface of the flexible conductive ring (7) is a circumferential surface and the thickness of the flexible conductive ring (7) is the same as the thickness of the shielding ring (3).

5. High isolation slip ring according to any of claims 1-4, characterized in that the outer diameter of the shielding ring (3) is larger than the outer diameter of the conductive ring (4).

6. High isolation slip ring according to any of claims 1-4, characterized in that the conductive ring (4) and the shielding ring (3) are both H62 brass rings.