WO2012136646A1 - Slip ring for transmitting electrical signals - Google Patents
Slip ring for transmitting electrical signals Download PDFInfo
- Publication number
- WO2012136646A1 WO2012136646A1 PCT/EP2012/056050 EP2012056050W WO2012136646A1 WO 2012136646 A1 WO2012136646 A1 WO 2012136646A1 EP 2012056050 W EP2012056050 W EP 2012056050W WO 2012136646 A1 WO2012136646 A1 WO 2012136646A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- slip ring
- ring according
- base body
- contact
- slip
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/08—Slip-rings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/14—Fastenings of commutators or slip-rings to shafts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/08—Slip-rings
- H01R39/10—Slip-rings other than with external cylindrical contact surface, e.g. flat slip-rings
Definitions
- the present invention relates to a slip ring having an annular base body, wherein at least one contact track likewise extends substantially annularly along at least one surface of the base body.
- a plurality of contact tracks can be arranged on the base body, both on one and the same surface, and on the respective opposite or angled surfaces of the base body.
- the main body generally consists of an insulating material, but at least the electrically conductive contact tracks are electrically insulated from the main body. In the case of multiple contact paths, these are also generally insulated relative to one another, even if in principle an electrical connection of two of the plurality of contact paths would be possible.
- the known slip rings usually have massive body, which consist for example of plastic or more particularly of epoxy resin. These bodies are relatively heavy and load accordingly the bearings of the slip rings and possibly also the contact surfaces, if they are in contact with corresponding static mating contacts, while the slip rings rotate.
- the contact tracks are therefore also referred to as "sliding tracks".
- the present invention Compared to this prior art, the present invention, the object of developing corresponding slip rings to the effect that corresponding bearings of rotating slip rings and possibly also the contact tracks of the slip rings are less stressed in use.
- the main body of such a slip ring has cavities, wherein the cavities reduce the weight and mass of the slip ring and the body.
- the cavities are provided in the body so that its mechanical stability is not significantly affected by these cavities.
- the cavities are distributed along the circumference of the slip ring in such a way that the center of mass of the main body lies on the axis of the ring shape which is defined by the base body.
- the mass of the main body should also be distributed over the geometric ring shape that no imbalance or Deviationsmomente occur during rotation about the ring axis.
- the contact tracks should be arranged according to rotationally symmetrical to the axis of the body.
- the cavity or cavities should make up at least 30%, preferably at least 75%, of the gross volume of the main body.
- gross volume is meant the volume that can be determined on the basis of the external dimensions of the base body and encloses the cavities in the base body, apart from a receiving volume for the contact track (s) Spacer for the sliding tracks and also serves for mechanical attachment to, for example, a bearing.
- the slip ring in one embodiment may have a rectangular cross-sectional profile so that it assumes, for example, the shape of an annular flat disc with two parallel annular surfaces, wherein on one or both annular surfaces in each case one or more parallel, annular, more precisely circular, contact paths.
- the contact paths could also be provided on a cylindrical inner surface or a cylindrical outer surface of an annular base body or they could also be provided along the cylindrical or conical inner surface or along the cylindrical or conical outer surface of a corresponding ring.
- the ring can also other cross-sectional profiles, for. B have a U-profile, with sliding tracks z. B. on the inner surfaces of the U-legs could be arranged.
- the contact paths can each protrude slightly over the surface of the corresponding surfaces or even flush with these and / or be sunk.
- the contact tracks could in turn consist of a material which has considerable cavities, for example of a fine-pored metal foam.
- Another possibility is not to make the slip ring from a continuous body, but to use individual segments or spacers, which are fixed only by the sliding tracks themselves or by a mechanical auxiliary construction, such as one or more closed rings.
- the contact tracks are not necessarily slideways in the literal sense, i. in direct mechanical or sliding contact with corresponding Ge gentitleen, but the invention also includes such "slip rings" whose contact track are moved without contact to corresponding mating contacts over, so that electrical signals, for example, capacitive or inductive transmitted through an air gap.
- electrical signals is not limited to “signals” in the narrower sense, but includes any form of transmission of electrical energy, i. in particular also energy for the operation of aggregates, engines or the like.
- the base body may also be part of a bearing, for example the inner ring or outer ring of a ball bearing or else it may consist of an electrically insulating intermediate layer between such a bearing ring.
- the slideways can be fixed to or in the segments or spacers.
- the sliding track may have undercuts or be made wider at the base, for example in the form of a dovetail profile.
- the positive fixing can then take place in such a way that the segment or the spacer is heated until the grinding path can be introduced. Upon cooling, the segment or the spacer contracts again and thus establishes the positive connection.
- the segments or spacers made of a flexible material, which encloses the shape of the slideways and retain their shape after the formation of the positive fit, for example by curing as in plastics or resins.
- the plastic body can be replaced by plastic pads and spacers.
- the plastic supports are located at the positions where the slip ring has contact with the metallic receptacle for the slip rings. In the case of a computer tomograph, these would be, for example, the so-called "brackets.”
- Spacers made of plastic are introduced between the slideways as needed to increase stability, for example, such as clips, which are in prepared grooves or undercuts of the slideway
- the slideways themselves can be made of hollow sections, which are used for weight and material savings, instead of solid material be rolled as a sliding track.
- grooves or slopes in the profile can be easily realized, which are then used to attach the slideways in the support, the individual segments and / or the spacers. If the mechanical support of the slip ring is not electrically conductive, it is also possible, as described above, to apply the profiles for the slideway directly by, for example, screws, rivets or gluing.
- a foamed or honeycomb-shaped material can also be used here. Due to the foam or the honeycomb structure significantly less material is needed without significantly affecting the strength.
- capacitive data transmission units are often integrated in addition to the classic sliding tracks.
- the use of these capacitive data transmission units leads to increasing EMC problems at high data rates.
- the transmission structure or transmitting antenna is attached to the flanks of a U-trench. The back is executed as a mass. The receiving antenna dives vertically into the trench.
- the arrangement of the capacitive data transmission units is much more compact and shielded on three sides with ground, which increases the noise immunity and reduces the electromagnetic radiation.
- the field distribution could be designed so that practically no field emerges from the trench.
- the use of a U-trench creates the opportunity to use this shaped as a ring to stabilize the slip ring assembly.
- slip ring or rotary transformer which consists of a slip ring body and sliding tracks.
- the slip ring body consists of a foamed or formed of a honeycomb structure material.
- the slip ring body is not a closed body.
- the slip ring body consists of individual segments or spacers.
- the segments or spacers are fixed by the sliding tracks themselves or by a mechanical auxiliary basic function, such as one or more closed rings.
- the slideways are placed directly on a bearing or on an existing mechanical support without a body.
- the slideways are fastened directly to a bearing or to an existing mechanical support without a body but with an electrically insulating intermediate element placed between the slideways and the mechanical support or bearing.
- the slideways are fixed to or in the segments or spacers, preferably by a frictional or positive connection.
- the slideways consist of hollow profiles.
- the slideways are rolled out of hollow profiles.
- the sliding tracks have in profile undercuts, grooves and / or slopes.
- the slip ring has a capacitive data transmission unit.
- the capacitive data transmission unit has a transmission structure or transmission antenna on the flanks of a U-trench.
- FIG. 1 shows a cross section of a slip ring made of foamed material, the cross section through a slip ring whose base body has a honeycomb structure
- a cross section through a contact track which consists of a hollow profile, a further cross section through an alternative contact track in the form of a hollow profile with undercuts,
- FIG. 1 shows a slip ring consisting of a main body 2 and two slideways recessed at a distance on a surface of the main body.
- the slip ring can be, for example, a circular disk whose imaginary axis in FIG. 1 extends to the right or left of the main body 1 in the vertical direction in the drawing plane, but it can also be a hollow-cylindrical annular body whose axis is horizontal and parallel in FIG extends to the surface containing the grinding tracks.
- the grinding or contact tracks protrude from the surface in which they are partially embedded, so that the main body does not come into contact with the mating contacts or their holder while the counter-contact (s) slides on the sliding track (slide ).
- the slideways are therefore also about the corresponding surface of the body something out, where they wear, at least when touching contact with corresponding mating contacts, gradually wear.
- the mating contacts can be resiliently mounted for this purpose.
- the main body 2 consists of a foamed material, such as a hard foam, but may also consist of a metal foam, in which case the two grinding or contact tracks 1 a, 1 b would have to be separated by an insulating layer of the main body 2.
- FIG. 2 shows a similar slip ring in which a rotation axis could again run either vertically or horizontally in the plane of the paper, wherein the base body 2 could for example consist of a honeycomb grid, which is closed on all sides by corresponding cover surfaces, or it could also honeycomb-shaped cavities in an otherwise solid plastic body with corresponding webs between adjacent, hexagonal cavities, be provided.
- the base body 2 could for example consist of a honeycomb grid, which is closed on all sides by corresponding cover surfaces, or it could also honeycomb-shaped cavities in an otherwise solid plastic body with corresponding webs between adjacent, hexagonal cavities, be provided.
- Figure 3 shows the top view of a segmented slip ring in disc form, wherein the disk-shaped base body consists of four segments 5a, 5b, 5c and 5d.
- the contact track 1 e is arranged rotationally symmetrical to the axis of the segments 5 a - 5 d, wherein the interruption gaps between adjacent segments are bridged by the grinding track 1 e and thus together hold the slip ring or the main body together.
- the break gaps could also be larger and the individual segments could in turn be made from a voided material
- FIG. 4 shows a spacer in whose trapezoidal recesses contact tracks with a cross-section, for example according to FIG. 5, could be used, wherein a plurality of such spacers could be arranged along the circumference of the corresponding contact tracks 7 and the spacers on a corresponding carrier, for example a bearing ring , frontally or on the cylindrical outer or inner side could be attached.
- Figure 6 shows only another profile cross-section of a corresponding contact track, which could also be received by appropriately adapted holding elements.
- FIG. 7 can be interpreted in two ways and both interpretations lead to a respective variant of the present invention.
- FIG. 7 shows a partial cross-section of a circular-disk-shaped main body 1 1, which has on its two opposite sides in each case a contact track 14 a or 14 b which could be interrupted in the circumferential direction if the individual contact surfaces are to be controlled independently, wherein the Circumferential direction here perpendicular to the paper plane, ie the axis of the circular disk 1 1 is located above the figure 7 and would run approximately parallel to a horizontal line in the paper plane.
- the elements 14a, 14b could serve as receiving antennas, for example, while the elements 13a, 13b would be transmitting antennas. In this way, signals could be exchanged between the antenna pairs 13a, 14a and 13b, 14b, respectively, while the disk 1 1 is rotating relative to the U-shaped receiving part.
- the element 11 could also be designed as a stationary web or plate, while the U-profile 2 is designed as a ring and could rotate about an axis arranged horizontally below the paper plane in FIG. 7, the body 2 again as a base body according to the present invention has cavities for the purpose of mass and inertial moment reduction.
Landscapes
- Rolling Contact Bearings (AREA)
- Motor Or Generator Current Collectors (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2012800135169A CN103460524A (en) | 2011-04-04 | 2012-04-03 | Slip ring for transmitting electrical signals |
DE112012001564.9T DE112012001564A5 (en) | 2011-04-04 | 2012-04-03 | Slip ring for transmission of electrical signals |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011015876 | 2011-04-04 | ||
DE102011015876.6 | 2011-04-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012136646A1 true WO2012136646A1 (en) | 2012-10-11 |
Family
ID=45952520
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2012/056050 WO2012136646A1 (en) | 2011-04-04 | 2012-04-03 | Slip ring for transmitting electrical signals |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN103460524A (en) |
DE (1) | DE112012001564A5 (en) |
WO (1) | WO2012136646A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3217487A1 (en) * | 2016-03-08 | 2017-09-13 | Schleifring und Apparatebau GmbH | Modular slip ring system |
DE102016203762A1 (en) * | 2016-03-08 | 2017-09-14 | Krones Ag | Slip Ring Transmitter for rotary machines |
EP4343986A1 (en) * | 2022-09-26 | 2024-03-27 | Dr. Johannes Heidenhain GmbH | Slip ring module |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108258556A (en) * | 2018-04-18 | 2018-07-06 | 嘉兴恩碧技电气有限公司 | A kind of spliced CT slip rings |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE875234C (en) * | 1942-04-26 | 1953-04-30 | Siemens-Schuckertwerke | Carbon slip ring |
US3976903A (en) * | 1972-06-24 | 1976-08-24 | The Lucas Electrical Company Limited | Slip ring assembly for A.C. machines |
GB1505806A (en) * | 1975-04-05 | 1978-03-30 | Meidensha Electric Mfg Co Ltd | Commutation arrangement for a dc machine |
GB1516140A (en) * | 1974-12-20 | 1978-06-28 | Sev Marchal | Rotors of electric machines |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005047799A1 (en) * | 2005-10-05 | 2007-05-24 | W.C. Heraeus Gmbh | Slip ring body for continuous power transmission |
CN201146317Y (en) * | 2007-11-18 | 2008-11-05 | 成都市宇中梅科技有限责任公司 | Double-track conductive structure of rotary body |
-
2012
- 2012-04-03 DE DE112012001564.9T patent/DE112012001564A5/en not_active Withdrawn
- 2012-04-03 CN CN2012800135169A patent/CN103460524A/en active Pending
- 2012-04-03 WO PCT/EP2012/056050 patent/WO2012136646A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE875234C (en) * | 1942-04-26 | 1953-04-30 | Siemens-Schuckertwerke | Carbon slip ring |
US3976903A (en) * | 1972-06-24 | 1976-08-24 | The Lucas Electrical Company Limited | Slip ring assembly for A.C. machines |
GB1516140A (en) * | 1974-12-20 | 1978-06-28 | Sev Marchal | Rotors of electric machines |
GB1505806A (en) * | 1975-04-05 | 1978-03-30 | Meidensha Electric Mfg Co Ltd | Commutation arrangement for a dc machine |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3217487A1 (en) * | 2016-03-08 | 2017-09-13 | Schleifring und Apparatebau GmbH | Modular slip ring system |
DE102016203762A1 (en) * | 2016-03-08 | 2017-09-14 | Krones Ag | Slip Ring Transmitter for rotary machines |
EP4343986A1 (en) * | 2022-09-26 | 2024-03-27 | Dr. Johannes Heidenhain GmbH | Slip ring module |
Also Published As
Publication number | Publication date |
---|---|
DE112012001564A5 (en) | 2014-01-16 |
CN103460524A (en) | 2013-12-18 |
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