EP3641076B1 - Logement de bague collectrice comportant une serrure à baïonnette - Google Patents

Logement de bague collectrice comportant une serrure à baïonnette Download PDF

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Publication number
EP3641076B1
EP3641076B1 EP19180216.4A EP19180216A EP3641076B1 EP 3641076 B1 EP3641076 B1 EP 3641076B1 EP 19180216 A EP19180216 A EP 19180216A EP 3641076 B1 EP3641076 B1 EP 3641076B1
Authority
EP
European Patent Office
Prior art keywords
slipring
housing
locking ring
bayonet lock
bearing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19180216.4A
Other languages
German (de)
English (en)
Other versions
EP3641076A1 (fr
Inventor
Jens RECKNAGEL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schleifring GmbH
Original Assignee
Schleifring GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schleifring GmbH filed Critical Schleifring GmbH
Priority to PCT/EP2020/061044 priority Critical patent/WO2020249289A1/fr
Priority to CN202080038758.8A priority patent/CN113875099B/zh
Publication of EP3641076A1 publication Critical patent/EP3641076A1/fr
Application granted granted Critical
Publication of EP3641076B1 publication Critical patent/EP3641076B1/fr
Priority to US17/547,408 priority patent/US11374355B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/625—Casing or ring with bayonet engagement
    • 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
    • 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
    • H01R39/64—Devices for uninterrupted current collection
    • H01R39/643—Devices for uninterrupted current collection through ball or roller bearing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6658—Structural association with built-in electrical component with built-in electronic circuit on printed circuit board
    • 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

Definitions

  • the invention relates to slipring devices for transmission of electrical signals between rotating parts. Specifically, it relates to housings of such slipring devices.
  • sliprings are used to transfer electrical power and/or signals between a rotating and a stationary part. Such sliprings are used in different applications, like wind energy plants or computer tomography scanners. There are also many industrial, military, and aerospace applications in which sliprings are used.
  • the sliprings should have a housing which allows simple integration into complex machines.
  • the housing further should provide a sufficient protection against dust, debris, and liquids.
  • the housing should allow easy disassembly of the slipring device for maintenance purposes.
  • EP 2 696 443 B1 A very robust and complex multifunctional slipring housing is disclosed in EP 2 696 443 B1 . It has a very high degree of sealing, but requires a large number of screws to be removed for opening the housing.
  • EP 1 026 794 B1 discloses a slipring in a plate-like arrangement. Due to the complex interior assembly and the multiply screwed housing, the disassembly is only possible with extremely high efforts.
  • US 4,485,278 discloses a device for automatically winding up a feeder cable.
  • a spring housing is attached by a bayonet lock to a drum.
  • the housing parts are held by a snap lock connection (locking pawls 1.2).
  • There is also no hollow shaft comprising at least one bayonet lock notch and no locking ring having at least one bayonet lock protrusion oriented in a radial direction to the center axis.
  • EP 3 096 175 A2 discloses binoculars having a sliding contact connection.
  • a pin 6 ( Figure 15) which protrudes into the tubular protrusion and interfaces with the first part (5).
  • US 2008/0192975 A1 discloses a sliding contact device having a printed circuit board.
  • EP 3 316 425 A1 discloses a 3D-printed slipring module.
  • CH 246 799 discloses a stacked slipring arrangement.
  • the problem to be solved by the invention is to provide a slipring device and a slipring housing which can easily be integrated in a complex environment and which further can easily be assembled in manufacturing and which can easily be disassembled for maintenance.
  • a slipring device comprises a first part and a second part which are rotatable against each other about a center axis.
  • the first part may be stationary, whereas the second part may be rotating relative thereto.
  • the rotating and stationary parts may be exchanged or even both parts may be rotating with different speeds.
  • the first part comprises a first housing which may contain all necessary slipring components.
  • a component may be at least one sliding track and/or one sliding brush.
  • the slipring component comprises a printed circuit board which may have a sliding track as a PCB trace, and/or a brush mounted and/or soldered to the PCB.
  • the second part arranged opposite to the first part also has a second housing and may further comprise slipring parts, like at least one a sliding track and/or one sliding brush.
  • the slipring component comprises a printed circuit board which may have a sliding track as a PCB trace, and/or a brush mounted and/or soldered to the PCB.
  • the slipring components in the first part and the second part are designed such that they interface in a way to form a sliding contact connection. Therefore, a contact brush at the first part interfaces with the sliding track at the second part and/or a contact brush at the second part interfaces with a sliding track at the first part. Preferably, multiple sliding contact connections are provided between the first part and the second part.
  • the first housing includes a hollow shaft which serves as a guidance for the second part and holds a locking means which is a locking ring.
  • the hollow shaft preferably has a free inner bore over its total length. This may allow to feed cables, waveguides and pipes through the hollow shaft and may even allow to insert further rotary joints.
  • the locking ring holds and locks the first part against the second part.
  • the spring is a wave spring or plate spring or a disk spring.
  • the spring is formed as one part with the locking ring.
  • the locking ring is a 3D printed part which has an integrated spring or multiple springs. This is a significant advantage over standard manufacturing methods, as these do not allow to combine the spring with the locking ring.
  • any part of the device may be made by a 3-D printing process. High-volume manufacturing may be performed by injection-molding.
  • the locking ring has a bayonet lock which allows simple assembly and disassembly of the slipring device.
  • the hollow shaft has at least one notch or a plurality of notches
  • the locking ring has at least one protrusion for interfacing with the notches of the hollow shaft.
  • the protrusion is oriented in a radial direction to the center axis. The order of the notches and protrusions may be exchanged.
  • Assembly of the slipring device is very simple.
  • the second part only has to be placed on the hollow shaft of the first part.
  • the locking ring has to be placed on the hollow shaft and to be locked. Locking is done by locking the bayonet lock by pressing the locking ring down in a locking position and then rotating the locking ring until the bayonet lock locks.
  • To unlock and disassemble the housing e.g. for service the locking ring may be rotated in the opposite direction. The direction may be counter clockwise for disassembly and clockwise for assembly.
  • the housing parts when manufactured from plastic material e.g. in a 3D printing process or injection molding process might incorporate metal threaded inserts to allow stable mounting of the slipring to a customer interface or to mount a torque bridge. Also, a metal or absorbent coating might be applied to the inner housing surface for shielding of the slipring to reduce electromagnetic emissions or improve electromagnetic susceptibility of the slipring.
  • the housing may comprise a metal, e.g. aluminum.
  • the first housing and/or the second housing are made of metal.
  • the first bearing is arranged between the first housing and the second housing in a direction parallel to the center axis.
  • the hollow shaft holds the second part and/or the second housing.
  • a simple position encoder can also be integrated by 3-D-printing a resistive substrate formed as a circle with the center at the rotation axis onto the inner surface of one part of the housing.
  • the substrate is contacted by at least one electrode static to the printed substrate and a metal brush that is mounted to the other part of the housing and that moves angularly with the rotation of the slipring so that an absolute or relative resistor value measured between the sliding brush and the at least one static electrode represents an angular position between the two housings to serve as an encoder.
  • the housing might also only partially cover the slipring to reduce costs or mass or inertia of the slipring.
  • Connectors might be mounted to the housing or to at least one of the printed circuit boards.
  • the slipring device basically comprises a first part 100 and a second part 200, which are rotatable against each other about a center axis 130.
  • the first part 100 has a first housing 110 which holds a first printed circuit board (PCB) 180.
  • This PCB may hold at least one first sliding track 182 and/or at least one contact brush 190.
  • the second part 200 has a second housing 210 with a second PCB 280.
  • the second PCB 280 has at least one second contact brush 290 and at least one second sliding track 282.
  • the sliding tracks and brushes are arranged such that a sliding track of the first PCB interfaces with a sliding brush of the second PCB, and vice versa to accomplish an electrical contact.
  • Between the first housing 110 and the second housing 210 is at least a first bearing 310 which provides mechanical support and allows rotation of the second housing against the first housing. It is preferred to have at least a second bearing 320.
  • the first housing 110 has a hollow shaft 120 which may serve as a centering means.
  • a locking ring 340 Attached to the hollow shaft 120 is a locking ring 340 which is configured to press preferably in a direction of the center axis 130 against a spring 330 to hold the second housing against the first housing in a defined position.
  • the locking ring has a bayonet lock by which it is locked against the hollow shaft 120.
  • the locking ring preferably is attached to the outside of the hollow shaft.
  • the inner diameter of the locking ring is larger than the outer diameter of the hollow shaft.
  • the locking ring 340 preferably has a bayonet lock protrusion 342. This protrusion is guided in a bayonet lock notch 122 at the hollow shaft 120.
  • the bayonet lock notches and the bayonet lock protrusions are arranged such that they match to each other. Preferably, there are at least two, and most preferably at least three or even more bayonet lock notches and adapted bayonet lock protrusions. Preferably, there are three such bayonet lock notches and bayonet lock protrusions under an angle of 120 degrees to each other. In general, it is preferred, if the bayonet lock notches are arranged equidistant.
  • the locking ring is placed on the top of the hollow shaft and the bayonet lock protrusion 342 is inserted into the bayonet lock notch 122 and pushed downwards.
  • the locking ring is rotated such that the protrusion engages with the bayonet lock and the locking ring 340 is held in place.
  • a slipring is shown in detail.
  • a first printed circuit board (PCB) 180 is mounted to a first housing as shown in Fig 1 .
  • This PCB 180 may hold at least one first sliding track 182 and/or at least one contact brush 190.
  • a first connector 170 may be mounted to the PCB and connector pins may be connected to the tracks. The connector may accessible by an opening of the first housing. There may also be at least one connector at the second PCB.
  • FIG 4 a detail of the bayonet lock is shown. Basically, this is a side view of a section of the hollow shaft 120.
  • the bayonet lock notch 122 is shown in detail.
  • This notch preferably has a first section 123 which goes into a direction such that the compression of the spring is increased.
  • a second section 124 preferably is under a right angle to the first section. This section can be reached by the bayonet lock protrusion 342 by rotating the locking ring.
  • FIG. 5 a detail of another embodiment of a bayonet lock is shown. Basically, this is similar to the previous embodiment, but has a modified second section 126. This second section 126 may have multiple sections with different heights. The bayonet lock protrusion 342 notch may engage with any of these sections resulting in a different position of the locking ring and therefore in different force of the spring 340. Here, by rotating the locking ring, the force may be adjusted.
  • FIG 6 a second embodiment of a slipring device is shown.
  • the slipring device is similar to the slipring device of figure 1 , but has different bearings.
  • slide bearings also called friction bearings are used.
  • Such bearings have surfaces sliding against each other.
  • the ball bearings are replaced by a first slide bearing 410 and a second slide bearing 420.
  • Figure 7 shows a detail of the locking ring with bayonet lock and a slide bearing. This is a detail of the previous figure.
  • Figure 8 shows a third embodiment of a slipring device.
  • the second housing 210 is sliding within first housing 110 and hollow shaft 120.
  • the first housing 110 and the hollow shaft 120 may also be one part.
  • Figure 9 shows a detail of the locking ring of the previous embodiment.
  • slipring device is similar to the slipring device of figure 1 , but has only one ball bearing 620.
  • Figure 11 shows a detail of the locking ring of the previous embodiment.

Landscapes

  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Pivots And Pivotal Connections (AREA)

Claims (14)

  1. Dispositif de bague collectrice comprenant une première partie (100) et une seconde partie (200) agencées en rotation l'une contre l'autre autour d'un axe central (130),
    la première partie (100) comprend un premier logement (110) maintenant au moins un premier composant de bague collectrice (180),
    la seconde partie (200) comprend un second logement (210) maintenant au moins un second composant de bague collectrice (280), et
    un premier palier (310) est agencé entre le premier logement (110) et le second logement (210),
    caractérisé en ce que
    le premier logement (110) comprend une tige creuse (120) qui maintient la seconde partie (200) et/ou le second logement (210),
    la tige creuse comprenant au moins une encoche de verrou à baïonnette (122),
    le premier logement (110) comprend en outre une bague de verrouillage (340) ayant au moins une saillie de verrou à baïonnette (342) orientée dans une direction radiale par rapport à l'axe central (130) concordant avec l'au moins une encoche de verrou à baïonnette (122), dans lequel un second palier (320) est agencé entre le second logement (210) et la bague de verrouillage (340),
    dans lequel la bague de verrouillage (340) est attachée à l'extérieur de la tige creuse (120) et est configurée pour exercer une pression contre un ressort (330) entre la bague de verrouillage (340) et le second logement (210) dans une direction de l'axe central (130) pour maintenir le second logement (210) contre le premier logement (110) dans une position définie.
  2. Dispositif de bague collectrice selon la revendication 1,
    caractérisé en ce que
    le second palier (320) peut être un roulement à billes ou un palier lisse.
  3. Dispositif de bague collectrice selon la revendication 2,
    caractérisé en ce que
    le ressort (330) est agencé entre le second palier (320) et la bague de verrouillage (340).
  4. Dispositif de bague collectrice selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le ressort (330) est un ressort ondulé ou un ressort à lames plates ou un ressort à disque.
  5. Dispositif de bague collectrice selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le premier composant de bague collectrice (180) comprend une première carte de circuit imprimé (PCB) (180) qui comprend au moins une piste de coulissement (182) et/ou un balai de coulissement (190).
  6. Dispositif de bague collectrice selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le second composant de bague collectrice (280) comprend une seconde carte de circuit imprimé (PCB) (280) qui comprend au moins une piste de coulissement (282) et/ou un balai de coulissement (290).
  7. Dispositif de bague collectrice selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le premier palier (310) est un roulement à billes ou un palier lisse.
  8. Dispositif de bague collectrice selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la tige creuse (120) a au moins 2 encoches de verrou à baïonnette (122) ou
    la tige creuse (120) a 3 encoches de verrou à baïonnette (122).
  9. Dispositif de bague collectrice selon la revendication 8,
    caractérisé en ce que
    les encoches de verrou à baïonnette (122) sont réparties à équidistance sur la circonférence de la tige creuse (120).
  10. Dispositif de bague collectrice selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    au moins une partie du dispositif de bague collectrice, c'est-à-dire la bague de verrouillage (340) est fabriquée par un processus d'impression 3D.
  11. Dispositif de bague collectrice selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le ressort (330) est d'un seul tenant avec la bague de verrouillage (340).
  12. Dispositif de bague collectrice selon la revendication 11,
    caractérisé en ce que
    le ressort (330) et la bague de verrouillage (340) sont tous deux fabriqués par un processus d'impression 3D.
  13. Dispositif de bague collectrice selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    au moins une partie du dispositif de bague collectrice est fabriquée par moulage par injection ou comprend un métal.
  14. Dispositif de bague collectrice selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le premier palier (310) est agencé entre le premier logement (110) et le second logement (210) dans une direction parallèle à l'axe central (130).
EP19180216.4A 2018-10-19 2019-06-14 Logement de bague collectrice comportant une serrure à baïonnette Active EP3641076B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/EP2020/061044 WO2020249289A1 (fr) 2018-10-19 2020-04-21 Boîtier à bague collectrice à verrouillage à baïonnette
CN202080038758.8A CN113875099B (zh) 2019-06-14 2020-04-21 滑环装置
US17/547,408 US11374355B2 (en) 2019-06-14 2021-12-10 Slipring housing with bayonet lock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18201546 2018-10-19

Publications (2)

Publication Number Publication Date
EP3641076A1 EP3641076A1 (fr) 2020-04-22
EP3641076B1 true EP3641076B1 (fr) 2020-09-30

Family

ID=63965147

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19180216.4A Active EP3641076B1 (fr) 2018-10-19 2019-06-14 Logement de bague collectrice comportant une serrure à baïonnette

Country Status (1)

Country Link
EP (1) EP3641076B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4343986A1 (fr) * 2022-09-26 2024-03-27 Dr. Johannes Heidenhain GmbH Module de bague collectrice

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH246799A (de) 1942-08-31 1947-01-31 Fides Gmbh Verfahren zur Herstellung eines mehrere axial nebeneinander geschichtete Schleifringe aufweisenden Schleifringkörpers.
DE3040664C2 (de) 1980-10-29 1985-09-26 Desco GmbH & Co, 7516 Karlsbad Vorrichtung zum selbsttätigen Aufwickeln einer Anschlußleitung
US6356002B1 (en) 1999-02-08 2002-03-12 Northrop Grumman Corporation Electrical slip ring having a higher circuit density
JP4127242B2 (ja) 2004-05-21 2008-07-30 ソニー株式会社 ヘッドホン装置及び電子機器
EP2696442A1 (fr) 2012-08-06 2014-02-12 Schleifring und Apparatebau GmbH Boîtier multifonctionel pour bague collectrice
US10139615B2 (en) 2015-05-19 2018-11-27 Swarovski-Optik Kg. Long-range optical device with a housing and a support means
EP3316425A1 (fr) 2016-10-25 2018-05-02 Schleifring GmbH Module d'une bague collectrice

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
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