CN110323648B

CN110323648B - Rolling type collecting ring device

Info

Publication number: CN110323648B
Application number: CN201910475347.4A
Authority: CN
Inventors: 戴恒震; 胡扬; 周雄; 尤传存
Original assignee: Dalian University of Technology
Current assignee: Dalian University of Technology
Priority date: 2019-06-03
Filing date: 2019-06-03
Publication date: 2020-08-14
Anticipated expiration: 2039-06-03
Also published as: CN110323648A

Abstract

The invention provides a rolling type collecting ring device which comprises an insulating shell, a flexible cantilever support, a flexible outer ring, an outer connecting column, an inner connecting column, a pin shaft, a retainer, a conductive inner wheel and a roller. Current and signals flow in from the outer terminal, flow to the flexible outer ring through the flexible cantilever support, flow out from the inner terminal through a planetary gear train structure consisting of the flexible outer ring, the roller, the conductive inner wheel and the retainer, and the whole transmission process is completed. The flexible outer ring is selected as the flexible ring, pretightening force is provided through bending deformation of the flexible outer ring, the flexible outer ring is tightly connected with the rigid roller and the conductive inner wheel, the stability of conduction is ensured, and the flexible outer ring is connected with the external wiring column through flexible cantilever support. Compared with the existing rolling type collector ring product, the invention has more compact and reliable structure, can effectively reduce the processing and assembling difficulty and is convenient for civil use.

Description

Rolling type collecting ring device

Technical Field

The invention relates to a transmission device for realizing 360-degree unlimited signal and power transmission between two relatively rotating moving parts, in particular to a rolling type collector ring device.

Background

The rotary connector (collecting ring) is a power transmission device for realizing 360-degree unlimited signal and power transmission between two opposite rotating parts, and is widely applied to the fields of wind power generation, military radars, aerospace and the like.

Most of the traditional collecting rings are solid sliding type conducting rings, electric brushes and the conducting rings are mutually contacted to form sliding friction pairs so as to realize the transmission of electric energy and signals, and due to the characteristic of sliding contact, the sliding collecting rings are subjected to frictional wear in the working process, and the generated powder scraps are easy to stay in the conducting rings, so that the working performance and the service life of the collecting rings are seriously influenced.

The rolling collector ring (rolling ring) uses a rolling electric contact friction pair to replace a traditional sliding electric contact friction pair. Under ideal working conditions, the rolling electric contact friction pair of the rolling ring is a theoretical pure rolling, and does not cause abrasion to electric contact materials.

The existing rolling ring product is characterized in that a flexible ring is clamped between an inner conducting ring and an outer conducting ring to roll under the action of a pre-tightening force to form a rolling electric contact friction pair. The flexible ring is a core component in the rolling ring, is like a ring, has small radius and wall thickness of nearly 0.3mm, and is difficult to meet by common processing means; the rolling rings are generally arranged in a plurality of flexible rings to improve the transportation power, and how to assemble the flexible rings with the inner ring and the outer ring to ensure the coaxiality, the concentricity and the coplanarity is also a technical problem.

Disclosure of Invention

The invention aims to provide a novel rolling type collector ring aiming at the technical problems.

The technical scheme of the invention is as follows:

a rolling type collector ring device mainly comprises an insulating shell 1, a flexible cantilever support ring 2, a flexible outer ring 3, an external connecting post 4, an internal connecting post 5, a pin shaft 6, a retainer 7, a conductive inner wheel 8 and a roller 9; six raised rectangular blocks are distributed on the inner surface of the insulating shell 1 at equal intervals, correspond to six rectangular through holes on the circular ring surface of the flexible cantilever support ring 2, and are combined to form an embedded structure so as to fix the flexible cantilever support ring 2; the insulating shell 1 is provided with an external terminal 4 which is connected with the flexible cantilever support ring 2 to lead in current and signals; the outer side surface of the flexible outer ring 3 is contacted with the flexible cantilever support ring 2, and the inner side surface of the flexible outer ring 3 is contacted with the roller 9, so that current and signals are transmitted into the conductive inner wheel 8 from the outside; the retainer 7 separates the rollers 9 to prevent collision and interference during working; the roller 9 is arranged on the retainer 7 through the pin shaft 6, the roller 9 is further contacted with the conductive inner wheel 8, the conductive inner wheel 8 is provided with the inner connecting post 5, and the transmission of current and signals between the roller 9 and the inner connecting post 5 is completed; when the roller 9 rotates to work, the conductive inner wheel 8 rotates to drive the roller 9 and the retainer 7 to revolve around the conductive inner wheel 8 and the flexible outer ring 3, and meanwhile, the rigid roller 9 rolls purely between the conductive inner wheel 8 and the flexible outer ring 3, so that stable transmission of current or signals is ensured.

The inner diameter of the flexible outer ring 3 is smaller than the sum of the outer diameters of the conductive inner wheel 8 and the two idler wheels 9, so that the flexible outer ring 3 is extruded and bent to deform, the generated pretightening force enables the flexible outer ring 3, the conductive inner wheel 8 and the idler wheels 9 to be in close contact, each rolling contact surface adopts a cylindrical surface, and the idler wheels are provided with trapezoidal ring grooves, so that stable and reliable operation is ensured.

The flexible cantilever support ring 2 is composed of a metal ring and a thin-wall cantilever contact, the cantilever beams are distributed in a rotational symmetry mode, the number of the cantilever beams is an integral multiple of the number of the rollers (generally, the number is 2), and displacement between the thin-wall cantilever contact and the flexible outer ring 3 is reduced or avoided.

The invention has the beneficial effects that:

(1) the structure of the rolling collecting ring is improved, the original conductive outer ring is used as a flexible ring to replace the original flexible planet ring, each rolling contact surface adopts a cylindrical surface, and a smaller roller adopts a rigid structure, so that the manufacturing and assembling difficulty of the rolling ring is reduced;

(2) the invention provides a flexible conductive support ring structure, which connects a flexible outer ring and an external terminal, wherein the service life of the flexible outer ring can be seriously reduced by the traditional connection mode of changing the mechanical property of the flexible outer ring by welding and the like, and the mechanical property of the flexible outer ring is hardly influenced by the flexible cantilever contact support;

(3) the invention has compact structure, large contact area between the inner ring and the outer ring and the roller ring groove, stable contact and small contact resistance, and provides guarantee for high-power rolling transmission.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

FIG. 2 is a schematic diagram of a cantilevered flexible support according to one embodiment of the invention.

In the figure: 1 an insulating housing; 2 flexible cantilever support ring; 3, a flexible outer ring; 4, connecting an external terminal; 5 connecting the terminal post internally; 6, a pin shaft; 7 a holder; 8 an electrically conductive inner wheel; 9 rollers.

Detailed Description

The invention provides a rolling type collecting ring device, which comprises an insulating shell 1, a flexible cantilever support ring 2, a flexible outer ring 3, an outer connecting post 4, an inner connecting post 5, a pin shaft 6, a retainer 7, a conductive inner wheel 8 and a roller 9, wherein the flexible cantilever support ring 2 is arranged on the insulating shell.

Wherein, the insulating shell 1 is a ring-shaped structure, six convex rectangular blocks are distributed on the inner surface of the insulating shell at equal intervals, the flexible cantilever support ring 2 consists of a ring and 6 flexible cantilever support beams, six rectangular through holes are also distributed on the ring surface at equal intervals, the two are combined to form an embedded structure to fix the flexible cantilever support ring 2, the insulating shell 1 is provided with an external terminal 4, is connected with the flexible cantilever support ring 2 to lead in current and signals, the flexible outer ring 3 is a thin-wall circular ring, the inner surface of the flexible cantilever support ring is in contact with a roller 9, the outer surface of the flexible cantilever support ring is in contact with the flexible cantilever support ring 2, current and signals are transmitted into the conductive inner wheel from the outside, the roller 9 is separated by the retainer 7 to prevent the roller from colliding and interfering in the working process, the roller is arranged on the retainer 7 by the pin shaft 6, the roller 9 is in contact with the conductive inner wheel 8, and the transmission of the current and the signals from the roller 9 to the inner terminal 5 is completed; when the rolling ring rotates to work, the conductive inner wheel 8 rotates to drive the roller 9 and the retainer 7 to revolve around the conductive inner wheel 8 and the flexible outer ring 3, and meanwhile, the roller 9 rolls between the conductive inner wheel 8 and the flexible outer ring 3, so that stable transmission of current or signals is ensured.

The device is a single-channel collecting ring, current and signals are input from an external terminal 4, pass through a flexible cantilever support ring 2, a flexible outer ring 3, a roller 9, a conductive inner wheel 8 and finally are output from an internal terminal 5.

In the device, a conductive inner wheel 8, a roller wheel 9, a retainer 7 and a flexible outer ring 3 form a planetary gear train structure, wherein the roller wheel 9 is a planetary gear, the retainer 7 is a planetary carrier, the conductive inner wheel 8 and the flexible outer ring 3 are central wheels, and a flexible cantilever support ring 2 is a conductive channel. The conductive inner wheel 8 is a rotating part, the flexible outer ring 3, the flexible cantilever support ring 2 and the insulating shell 1 are fixed parts, when the collecting ring works, a rolling friction pair is formed among the flexible outer ring 3, the conductive inner wheel 8 and the roller 9, the roller 9 rolls between the inner ring and the outer ring, and current and signals are transmitted to the fixed parts from the rotating part; the bending deformation of the flexible outer ring 3 provides a pre-tightening force for tight contact between the collector rings, and stable transmission of current and signals in the working process of the collector rings is guaranteed.

The invention adopts the outer ring as the flexible ring, utilizes the bending deformation of the outer ring to generate pretightening force, leads the roller 9 to be always in effective contact with the conductive inner wheel 8 and the flexible outer ring 3, and utilizes the flexible cantilever support ring 2 to lead out the current on the flexible outer ring.

Claims

1. A rolling type collector ring device is characterized in that: the rolling type collector ring mainly comprises an insulating shell (1), a flexible cantilever support ring (2), a flexible outer ring (3), an outer connecting post (4), an inner connecting post (5), a pin shaft (6), a retainer (7), a conductive inner wheel (8) and a roller (9); six raised rectangular blocks are distributed on the inner surface of the insulating shell (1) at equal intervals, correspond to six rectangular through holes on the circular ring surface of the flexible cantilever support ring (2), and are combined to form an embedded structure to fix the flexible cantilever support ring (2); the insulation shell (1) is provided with an external terminal (4) which is connected with the flexible cantilever support ring (2) to lead in current and signals; the outer side surface of the flexible outer ring (3) is contacted with the flexible cantilever support ring (2), and the inner side surface of the flexible outer ring (3) is contacted with the roller (9) to transmit current and signals into the conductive inner wheel (8) from the outside; the retainer (7) separates the rollers (9) to prevent collision and interference during working; the roller (9) is arranged on the retainer (7) through a pin shaft (6), the roller (9) is further contacted with the conductive inner wheel (8), the conductive inner wheel (8) is provided with an inner post (5), and the transmission of current and signals between the roller (9) and the inner post (5) is completed; when the roller (9) rotates to work, the conductive inner wheel (8) rotates to drive the roller (9) and the retainer (7) to revolve around the conductive inner wheel, and meanwhile, the rigid roller (9) rolls between the conductive inner wheel (8) and the flexible outer ring (3) purely, so that the stable transmission of current or signals is ensured.

2. The rolling slip ring device of claim 1, wherein: the inner diameter of the flexible outer ring (3) is smaller than the sum of the outer diameters of the conductive inner wheel (8) and the two rollers (9), so that the flexible outer ring (3) is extruded and bent to deform, the generated pretightening force enables the flexible outer ring (3), the conductive inner wheel (8) and the rollers (9) to be in close contact, each rolling contact surface adopts a cylindrical surface, and the rollers are provided with trapezoidal ring grooves, so that stable and reliable operation is ensured.

3. A rolling slip ring device according to claim 1 or 2, wherein: the flexible cantilever support ring (2) is composed of a metal circular ring and a thin-wall cantilever contact, the cantilever beams are distributed in a rotational symmetry mode, the number of the cantilever beams is integral multiple of the number of the rollers, and displacement between the thin-wall cantilever contact and the flexible outer ring (3) is reduced or avoided.