EP0911241B1 - Contact de mise à la terre - Google Patents

Contact de mise à la terre Download PDF

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Publication number
EP0911241B1
EP0911241B1 EP98810926A EP98810926A EP0911241B1 EP 0911241 B1 EP0911241 B1 EP 0911241B1 EP 98810926 A EP98810926 A EP 98810926A EP 98810926 A EP98810926 A EP 98810926A EP 0911241 B1 EP0911241 B1 EP 0911241B1
Authority
EP
European Patent Office
Prior art keywords
contact
contact piece
protective sleeve
earthing
brush
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.)
Expired - Lifetime
Application number
EP98810926A
Other languages
German (de)
English (en)
Other versions
EP0911241A1 (fr
EP0911241B2 (fr
Inventor
Bruno Wittwer
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.)
TIBRAM AG
Original Assignee
TIBRAM AG
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Filing date
Publication date
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Application filed by TIBRAM AG filed Critical TIBRAM AG
Publication of EP0911241A1 publication Critical patent/EP0911241A1/fr
Publication of EP0911241B1 publication Critical patent/EP0911241B1/fr
Application granted granted Critical
Publication of EP0911241B2 publication Critical patent/EP0911241B2/fr
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F15/00—Axle-boxes
    • B61F15/20—Details
    • B61F15/28—Axle-boxes modified to ensure electrical conductivity

Definitions

  • the present invention relates to a ground contact, particularly for rail vehicles suitable is.
  • An axle bushing or an axle bushing arrangement is closed under a grounding contact understand which is an electrically conductive connection between a first Power connection and an axis rotatable with respect to this first connection or Shaft or a second power connection connected to this axis or shaft guaranteed.
  • An earth contact therefore has the function of a current bridge between a stationary part and a moving part.
  • the grounding brush has one or more sliders (typically in the form of carbon brushes) which is in sliding contact with a surface (contact surface) of the contact piece are arranged to be both at rest and when rotating Contact piece an electrically conductive connection between the contact piece and the grounding brush.
  • sliders typically in the form of carbon brushes
  • Earthing contacts are e.g. in electrical locomotives for current-carrying connection the locomotive with its axles used so that the circuit from the Power source (power plant or substation) via the catenary, the pantograph, the Electric motor, the locomotive, the axles, the wheels and the rails back to the Power source can be closed, see e.g. the CH-PS-106 070.
  • Grounding contacts are not only included Locomotives, but used in all rail vehicles, one require a current-conducting connection between the vehicle and the rails.
  • Under a Rail vehicle is to be understood as any vehicle that can be driven on one or more rails is suitable, e.g.
  • Rail vehicles are provided with any power-operated devices (e.g. lighting, air conditioning, loudspeaker system, etc.) are practically all Rail vehicles equipped with one or more earth contacts.
  • the earth contacts which are the electrical connection between rail vehicles the vehicle (or its chassis) and the axle are forced always arranged in the vicinity of axle bearings, which the storage of the Axle on the vehicle or on its chassis, especially the storage of Wheelsets in bogies.
  • the axle bearings of rail vehicles included Always use a significant amount of grease and / or others for lubrication Lubricants. These lubricants can, if they are in the area between the Contact area and the carbon brushes contacting this, the current conductivity between the earthing brush and the contact surface. moreover lead the lubricants in connection with abrasion material of the carbon brushes Formation of lumps of material.
  • axle bearings were previously Provide special sealants for axles equipped with earth contacts which prevent lubricants from escaping from the axle bearings and thus Protect the ground contacts from contamination by the lubricants. Due to the considerable dimensions of the axle bearings of rail vehicles, especially of locomotives, and due to the high demands on the sealants in terms of durability and functionality in harsh operating conditions regarding temperature fluctuations and pollution these are Sealant for the axle bearings large, heavy and expensive to manufacture.
  • the object of the present invention is to provide a grounding contact which is essentially insensitive to contamination from lubricants.
  • a ground contact which is particularly for a rail vehicle a grounding brush comprising an electrically conductive lubricant is suitable on the rotatably on a chassis (in the case of application for a rail vehicle is to be arranged on a chassis of the rail vehicle), as well as a reference the grounding brush rotatable contact piece, which rotates on one on the chassis arranged wheel axle can be attached.
  • the lubricants are in electrical to arrange conductive contact to the contact piece, both when rotating and an electrically conductive connection between the To provide contact piece and the grounding brush.
  • the inventive Ground contact on a protective sleeve surrounding the glide means which the Penetration of lubricants through the protective sleeve, the contact piece and the earthing brush prevents limited cavity.
  • the protective sleeve of the grounding contact according to the invention makes it possible for the Earthing contacts according to the prior art required sealant in the Axle bearings to do without, because the lubricant through the protective sleeve from the ground contact and thus in particular also be kept away from the abrasion material, whereby the formation of lumps of lubricants and abrasion material mentioned at the beginning is prevented.
  • the protective sleeve not only protects the ground contact against the penetration of lubricants, but also against the penetration of others Contamination materials, which affect the functionality and / or the service life earth contact.
  • Another advantage is the protective sleeve of the ground contact according to the invention, the abrasion material in the ground contact back, which is formed when the lubricant is on a surface of the sliding or grinding rotating contact piece.
  • the protective sleeve is held back, there cannot be any near the grounding contact arranged components, e.g. Axle bearing, dirty and / or obstruct.
  • the sliding means of the grounding contact according to the invention preferably comprise one or more carbon brushes; however, other suitable electrical ones can also be used conductive glides are used.
  • the contact piece preferably has an essentially flat, disk-shaped one Section on - a so-called contact disk - that is perpendicular in one plane is circular to the axis of rotation of the contact piece (plane of rotation).
  • the contact disk rotatably on an axle end plate of a wheel axle of the rail vehicle to arrange.
  • the protective sleeve of a preferred embodiment of the invention is tubular and attached to the grounding brush in a rotationally fixed manner.
  • the protective sleeve is different Has shape.
  • the protective sleeve it is possible for the protective sleeve to rotate on the contact piece is attached and rotates with it. In this case, those are explained below Sealant arranged between the protective sleeve and the grounding brush.
  • the scope is Sealant between the protective sleeve and the contact piece significantly smaller than the scope of the axle bearings.
  • the circumference of the sealant is between the protective sleeve and the contact piece in a plane of rotation of the contact piece smaller than that Circumference of the wheel axle.
  • the scope of these sealants is even smaller than half the circumference of the wheel axle.
  • An embodiment of the invention is characterized in that the sealing means a non-contact labyrinth seal between the protective sleeve and the contact piece include, in which the contact-side end edge of the protective sleeve with a correspondingly formed on the contact piece in the sealing Function interacts.
  • the sealing means a differently designed labyrinth seal, a lip seal, a gap seal, a mechanical seal or The like includes.
  • the protective sleeve of the grounding contact can be a simple circular cylindrical one Have shape.
  • the protective sleeve has a mounting flange integrated into the sleeve for fastening the sleeve on the grounding brush.
  • the diameter of the tubular increases Protective sleeve from the attachment point of the protective sleeve to the grounding brush continuously towards the contact piece end of the protective sleeve.
  • a preferred one Embodiment of the invention is further characterized in that the scope the protective sleeve in a plane of rotation of the contact piece at least on the contact piece side End of the protective sleeve is smaller than the circumference of the wheel axle.
  • the protective sleeve is preferably relatively close-fitting around the sliding means arranged.
  • the cross-sectional area is the protective sleeve, measured in a plane of rotation of the contact piece, at least at the contact end of the protective sleeve smaller than four times the cross-section the lubricant.
  • FIG. 2 shows an exemplary embodiment of a grounding contact 10 according to the invention a longitudinal section along a wheel axis equipped with the ground contact 10 70 shown.
  • FIG. 1 there is an earth contact in an analog view 110 shown according to the prior art, equipped with a wheel axle 170 is.
  • the grounding contact 10 essentially exists a grounding brush 20, a contact piece 30 and a protective sleeve 40.
  • the grounding brush 20 has a housing 22, which is usually made of metal and / or plastic.
  • the housing 22 comprises four guide shafts open on one side, in which four elongated, columnar carbon brushes 51, 52, 53, 54 with the cross sections corresponding to the shaft cross sections are movably guided in the longitudinal direction of the shaft.
  • the cross-sectional areas of the carbon brushes 51, 52, 53, 54 each measure approximately 4 cm 2 .
  • the cross sections of the carbon brushes 51, 52, 53, 54 are essentially square.
  • embodiments of the invention with different cross-sectional areas and different numbers of carbon brushes are also possible.
  • the columnar carbon brushes 51, 52, 53, 54 protrude on the contact piece side beyond the shaft openings and thus the brush housing 22.
  • the carbon brushes 51, 52, 53, 54 are pressed outwards by springs arranged in the brush housing 22 through the shaft openings (to the right in FIGS. 2 and 5).
  • the grounding brush 20 is arranged with respect to the contact piece 30 in such a way that the carbon brushes 51, 52, 53, 54 are pressed essentially perpendicularly onto a contact surface 34 of the contact piece 30 in order to touch it in a sliding contact and an electrically conductive connection between the contact piece 30 and the grounding brush 20.
  • the grounding brush points 20 further a flange 26 for the attachment of the grounding brush e.g. at the Chassis of a rail vehicle.
  • the grounding brush 20 on the Outside 24 provided with a power connection 25 which is electrically conductive with the Carbon brushes 51, 52, 53, 54 is connected.
  • a connection e.g. With power cable connected to the electric motor or the mass of the rail vehicle be connected to a current bridge from the rail vehicle via the earth contact, to make the axle and the wheels to the railroad tracks.
  • the contact piece 30 has one at its end facing the grounding brush 20 essentially flat, disc-shaped section with a circular cross section, which is called a contact disk.
  • the directed towards the grounding brush 20 Surface 34 of the contact disk is referred to as contact surface 34.
  • annular recess 31 At the outer edge is an angular recess 31 on the contact surface 34 Formed circumference of the contact disk along such that the outer edge of the Contact disk by a set back in the axial direction from the contact surface 34, annular web 32 is formed.
  • the annular recess 31 cooperates the contact piece-side, ring-shaped end edge 42 of FIG Protective sleeve 40 together to form a labyrinth seal with this.
  • the annular web 32 on the outer edge of the contact disk has essentially that Function of a splash edge: as soon as grease or other lubricants, especially from the axle bearings 81, 82, on the contact piece 30, it is due to the the rotating contact piece 30 causes centrifugal force to the splash edge 32 hurled and sprayed away from the contact piece 30.
  • the ground contact 10 has one of the carbon brushes 51, 52, 53, 54 relatively closely surrounding protective sleeve 40, which lubricants and others Contaminants from the area of the contact surface 34 and the carbon brushes 51, 52, 53, 54 keeps.
  • the protective sleeve 40 is in the embodiment shown in the figures of the invention are tubular and are integrated into the sleeve 40 Mounting flange 41 is rotatably attached to the grounding brush 20, however other embodiments of the invention are also possible in which the protective sleeve 40 has a different shape.
  • the protective sleeve 40 shown in the figures has a circular shape Cross section, the diameter of the protective sleeve 40 from the mounting flange 41 to the contact-side end edge 42 of the protective sleeve 40 continuously decreases.
  • the diameter of the circular measures Protective sleeve 40 at the contact edge end 42 about 8 cm, wherein the cross-sectional arrangement of the carbon brushes 51, 52, 53, 54 a Edge length of about 4.4 cm.
  • the carbon brushes 51, 52, 53, 54 are from the Protective sleeve thus enclosed relatively closely. From Fig. 2 it can also be seen that the Scope of the protective sleeve 40 in a rotational plane of the contact piece 30 is essential is smaller than the circumference of the wheel axle 70 and the circumference of the axle bearings 81, 82.
  • the grounding brush 20, the contact piece 30 and the protective sleeve 40 limit one Cavity 60 a.
  • Sealing means 31, 42 are provided between the protective sleeve 40 and the contact piece 30.
  • the annular end edge 42 of the protective sleeve 40 is in relation to the annular Recess 31 of the contact disk arranged such that the arrangement forms a labyrinth seal 31, 42 in total.
  • the space between the end edge 42 of the protective sleeve 40 and the contact disk measures only approximately 1 mm.
  • the Labyrinth seal 31, 42 ensures in conjunction with that acting as a splash edge annular web 32 of the contact piece 30 a reliable, non-contact Sealing the cavity 60.
  • Fig. 1 is for comparison with a grounding contact 110 according to the prior art Technically equipped wheel axis 170 shown.
  • the grounding brush 120 with the carbon brushes 151, 152, 153, 154 of the ground contact 110 is correct in terms of their shape and function essentially with the grounding brush 20 with the carbon brushes 51, 52, 53, 54 of the grounding contact 10 according to the invention.
  • the contact piece 30 and correspond to the axle positions 81, 82 in the grounding contact 10 according to the invention the contact piece 130 and the axle bearings 181, 182 of the known ground contact 110th
  • the invention creates a ground contact being essentially insensitive to lubricant contamination is.
  • Embodiment of the grounding contact according to the invention also by means of sealing means to seal the earth contact, especially against axle bearings that are much more compact, lighter and less expensive than the corresponding ones Sealant for the axle bearings for earthing contacts according to the state of the technique.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Elimination Of Static Electricity (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
  • Contacts (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)

Claims (10)

  1. Contact de mise à la terre (10), notamment pour un véhicule sur rails, doté d'un balai de mise à la terre (20), comportant des organes de glissement (50, 51, 52, 53) électroconducteurs, à disposer de façon rigide en rotation, sur un châssis et doté d'un plot de contact (30) mobile en rotation relativement au balai de mise à la terre (20), dans lequel les organes de glissement (50, 51, 52, 53) sont placés en contact électroconducteur avec le plot de contact (30) de façon à mettre une liaison électroconductrice à disposition entre le plot de contact (30) et le balai de mise à la terre (20), dans le cas où le plot de contact (30) est en rotation comme dans le cas où il est immobile, caractérisé par une douille de protection (40) entourant les organes de glissement (50, 51, 52, 53) servant à éviter que les lubrifiants ne pénètrent dans un espace (60) délimité par la douille de protection (40), le plot de contact (30) et le balai de mise à la terre (20).
  2. Contact de mise à la terre (10) selon la revendication 1, caractérisé en ce que le plot de contact (30) présente une partie essentiellement plane en forme de disque avec une section circulaire (disque de contact), dans lequel le plot de contact est à agencer, de façon rigide en rotation, sur un disque d'essieu (72) d'un essieu (70) monté sur le châssis.
  3. Contact de mise à la terre (10) selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que la douille de protection (40) est essentiellement tubulaire et en ce qu'elle est fixée, de façon rigide en rotation, sur le balai de mise à la terre (20).
  4. Contact de mise à la terre (10) selon l'une quelconque des revendications 1 à 3, caractérisé par des organes d'étanchéité (31, 42) à disposer entre la douille de protection (40) et le plot de contact (30) servant à éviter que les lubrifiants ne pénètrent dans l'espace (60) délimité par la douille de protection (40), le plot de contact (30) et le balai de mise à la terre (20).
  5. Contact de mise à la terre (10) selon la revendication 4, caractérisé en ce que les organes d'étanchéité (31, 42) comportent, entre la douille de protection (40) et le plot de contact (30), une garniture en labyrinthe sans contact (31, 42) dans laquelle le bord en bout (42) de la douille de protection (40), du côté du plot de contact, et un creux (31) formé de façon adéquate sur le plot de contact (30), assurent conjointement une fonction d'étanchéité.
  6. Contact de mise à la terre (10) selon la revendication 2 et selon l'une quelconque des revendications 4 ou 5, caractérisé en ce que la circonférence des organes d'étanchéité (31, 42) entre la douille de protection (40) et le plot de contact (30) dans un plan de rotation du plot de contact (30) est inférieure à la circonférence des boítes d'essieu (81, 82) qui servent au montage de l'essieu (70).
  7. Contact de mise à la terre (10) selon la revendication 6, caractérisé en ce que la circonférence des organes d'étanchéité (31, 42) entre la douille de protection (40) et le plot de contact (30) dans un plan de rotation du plot de contact (30) est inférieure à la circonférence de l'essieu (70).
  8. Contact de mise à la terre (10) selon l'une quelconque des revendications 2 à 7, caractérisé en ce que la circonférence de la douille de protection (40) dans un plan de rotation du plot de contact (30) est, au moins au niveau de l'extrémité (42) de la douille de protection (40) du côté du plot de contact, inférieure à la circonférence de l'essieu (70).
  9. Contact de mise à la terre (10) selon l'une quelconque des revendications 1 à 8, caractérisé en ce que la section de la douille de protection (40) dans un plan de rotation du plot de contact (30) est, au moins au niveau de son extrémité (42) du côté du plot de contact, inférieure à quatre fois la section des organes de glissement (50, 51, 52, 53).
  10. Véhicule sur rails avec contact de mise à la terre (10) selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le contact de mise à la terre (10) présente, d'une part, un balai de mise à la terre (20) agencé de façon rigide en rotation, sur le châssis du véhicule sur rails et comportant des organes de glissement électroconducteurs (50, 51, 52, 53) et, d'autre part, un plot de contact (30) mobile en rotation relativement au balai de mise à la terre (20), dans lequel les organes de glissement (50, 51, 52, 53) sont placés en contact électroconducteur avec le plot de contact (30) de façon à mettre une liaison électroconductrice à disposition entre le plot de contact (30) et le balai de mise à la terre (20), dans le cas où le plot de contact (30) est en rotation comme dans le cas où il est immobile, ainsi qu'une douille de protection (40) entourant les organes de glissement (50, 51, 52, 53) servant à éviter que les lubrifiants ne pénètrent dans un espace (60) délimité par la douille de protection (40), le plot de contact (30) et le balai de mise à la terre (20).
EP98810926A 1997-10-22 1998-09-17 Contact de mise à la terre Expired - Lifetime EP0911241B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH245497 1997-10-22
CH245497 1997-10-22
CH2454/97 1997-10-22

Publications (3)

Publication Number Publication Date
EP0911241A1 EP0911241A1 (fr) 1999-04-28
EP0911241B1 true EP0911241B1 (fr) 2003-03-05
EP0911241B2 EP0911241B2 (fr) 2007-02-21

Family

ID=4234199

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98810926A Expired - Lifetime EP0911241B2 (fr) 1997-10-22 1998-09-17 Contact de mise à la terre

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EP (1) EP0911241B2 (fr)
AT (1) ATE233686T1 (fr)
DE (1) DE59807370D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10256975A1 (de) * 2002-12-05 2004-06-24 Siemens Ag Vorrichtung zum Erden eines Eisenbahnfahrzeugs
DE102010039847A1 (de) * 2010-08-26 2012-03-01 Schunk Bahn- Und Industrietechnik Gmbh Erdungskontakt

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH106070A (de) * 1923-08-13 1924-08-01 Kugellagerwerke J Schmid Roost Stromrückleitungseinrichtung an elektrischen Bahnmotorwagen mit Kugel- oder Rollenlagern.
DE19654339B4 (de) * 1996-12-24 2004-12-02 G. Dietrich Gmbh Erdungskontakteinrichtung

Also Published As

Publication number Publication date
ATE233686T1 (de) 2003-03-15
EP0911241A1 (fr) 1999-04-28
EP0911241B2 (fr) 2007-02-21
DE59807370D1 (de) 2003-04-10

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