EP0000325A1 - Palier de fixation pour barre d'attelage - Google Patents

Palier de fixation pour barre d'attelage Download PDF

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Publication number
EP0000325A1
EP0000325A1 EP78100075A EP78100075A EP0000325A1 EP 0000325 A1 EP0000325 A1 EP 0000325A1 EP 78100075 A EP78100075 A EP 78100075A EP 78100075 A EP78100075 A EP 78100075A EP 0000325 A1 EP0000325 A1 EP 0000325A1
Authority
EP
European Patent Office
Prior art keywords
bearing
rings
bearing rings
bearing housing
tie rod
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.)
Granted
Application number
EP78100075A
Other languages
German (de)
English (en)
Other versions
EP0000325B1 (fr
Inventor
Georg Dr.-Ing. Rockinger
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.)
Rockinger Spezialfabrik fuer Anhangerkupplungen GmbH and Co
Original Assignee
Rockinger Spezialfabrik fuer Anhangerkupplungen GmbH and Co
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 Rockinger Spezialfabrik fuer Anhangerkupplungen GmbH and Co filed Critical Rockinger Spezialfabrik fuer Anhangerkupplungen GmbH and Co
Publication of EP0000325A1 publication Critical patent/EP0000325A1/fr
Application granted granted Critical
Publication of EP0000325B1 publication Critical patent/EP0000325B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60D—VEHICLE CONNECTIONS
    • B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
    • B60D1/48—Traction couplings; Hitches; Draw-gear; Towing devices characterised by the mounting
    • B60D1/50—Traction couplings; Hitches; Draw-gear; Towing devices characterised by the mounting resiliently mounted

Definitions

  • the invention relates to a mounting for a tie rod carrying a coupling head of a trailer coupling to be attached in particular to trucks with a bearing housing surrounding the tie rod at a radial distance and immovably arranged on the truck, in which the tie rod can be rotated about its axis via bearing rings which bear against the inside of the bearing housing.
  • the bearing housing has at its ends axially outwardly widening contact surfaces for complementarily designed conical surfaces on the outer circumference of the bearing rings, and wherein the bearing rings are tensioned by axially acting spring means against the contact surfaces of the bearing housing and are so elastically deformable under the axial preload that they essentially prevent radial play between the tie rod and the bearing housing.
  • Such storage is known for example from DT-OS 17 18 380.
  • the spring means are formed by rubber buffers which rest on pressure plates on the essentially axially normal outer end faces of the bearing rings and tension these against the contact surfaces of the bearing housing.
  • the invention has for its object to protect a tie rod bearing of the above type against penetrating moisture and to prevent rusting on the tie rod.
  • the bearing rings are provided with a sealing ring on their end surface which is essentially axially normal and intended for bearing against a pressure surface of the spring means.
  • the arrangement of sealing rings between the pressure plates and the bearing rings ensures that even if the surfaces of the pressure plates and the bearing rings which are intended to be in contact with one another are not absolutely flat, no water can penetrate between them into the interior of the bearing housing.
  • the sealing ring can be connected to the bearing ring in any way.
  • the bearing rings are made of plastic, the sealing ring being designed as an edge bead rising above the end face. This makes it possible to manufacture the bearing rings and the sealing ring from one piece, as a result of which a sealing surface, namely the sealing surface between the sealing ring and the end face of the bearing ring, is eliminated.
  • the diameter of the pull rod is slightly smaller than the inner diameter of the bearing housing in order to prevent friction between the pull rod and the bearing housing. Since the axial extension of the bearing rings in the known embodiment is approximately equal to the axial extension of the conical contact surfaces on the bearing housing, there is an annular cavity in the bearing housing. Since it is not possible to hermetically seal this cavity, condensation water can form in it under certain conditions, which can cause rusting of the bearing housing and Drawbar leads.
  • the bearing rings according to the invention are connected on their side facing the inside of the bearing housing with a cylindrical sleeve, the outside diameter of which is substantially equal to the inside diameter of the bearing housing and the inside diameter of which is equal to the inside diameter of the bearing rings.
  • These sleeves essentially fill the annular cavity between the tie rod and the inner wall of the bearing housing, so that practically no condensed water can form here and, moreover, corrosion that is possible due to a certain residual moisture is avoided by the sleeves being on both the peripheral surface of the tie rod and rub on the inside wall of the bearing housing and prevent rust from forming on these surfaces.
  • the sleeves, the N achstell Koch not hinder the conical bearing rings
  • the axial length of the sleeves is preferably somewhat less than half the axial length of the lying between the conical bearing faces bearing housing cylindrical portion.
  • the bearing rings with the respective cylindrical sleeve are preferably designed as a one-piece bearing bush, which can be produced simply and inexpensively and can be replaced easily and quickly as a wearing part.
  • the inside diameter of the bearing rings or the bearing bushes is approximately 0.5 mm larger than the diameter of the pull rod at the bearing points. This allows the bearing rings to be easily pushed onto the pull rod.
  • the bearing rings are then in the installed state by the axial pressure of the spring means so pressed against the conical contact surfaces of the bearing housing that they are radially compressed in the area of these contact surfaces, whereby the diameter difference between the inner diameter of the bearing rings and the outer diameter of the tie rod is reduced to about 0.1 to 0.2 mm.
  • Good maintenance of the tie rod surface within the bearing housing can also be achieved in that at least one flat groove running obliquely to the axis is formed on the inner peripheral surface of the bearing bush formed by the bearing ring and sleeve.
  • This groove designed according to the type of a twist pull, allows lubricant to be introduced between the sliding surfaces of the pull rod and bearing bush.
  • a coupling head 10 which is attached to a tie rod 12.
  • the pull rod 12 passes through a bearing bore 14 of a bearing housing 16 and is rotatably and axially displaceably mounted therein via bearing bushes 18.
  • the bearing housing 16 is fastened via a flange 20 provided on its outer circumference to a fastening cross member 22 connected to a towing vehicle, not shown.
  • the bearing bore 14 has a cylindrical central portion, the inner diameter of which is greater than the outer diameter of the tie rod 12 in its part passing through the bearing housing 16, so that an annular space is formed between the peripheral wall of the bearing bore 14 and the peripheral surface of the tie rod 12.
  • the inner circumferential wall of the bearing bore 14 merges into axially outwardly widening contact surfaces 24 which are intended for contact with cone surfaces 26 which are complementarily shaped on the bearing bushes 18.
  • Both bearing bushes 18 are of identical design.
  • Each bearing bush 18 consists of a ring part 28, on the outer circumference of which the conical surface 26 intended for bearing against the respective contact surface 24 of the bearing housing 16 is formed, and a cylindrical sleeve part 30.
  • the ring part 28 and the sleeve part 30 are made in one piece from one another from an elastically deformable material , preferably a plastic, such as polytetrafluoroethylene.
  • the outside Diameter of the sleeve part 30 is selected so that the bearing bushes 18 can be pressed into the bearing bore 14 with a clamp fit.
  • the inner diameter of the bearing bush is about 0.5 mm larger than the outer diameter of the pull rod 12, so that the pull rod 12 can be easily pushed through the bearing bushes 18.
  • the axial length of the sleeve part 30 is slightly less than half the axial length of the cylindrical portion of the bearing bore 14, so that a distance of a few millimeters remains between the facing end faces of the bearing bushes 18 inserted into the bearing housing 16, the function of which will be explained in the following .
  • the cone surface 26 on the ring part 28 merges at its edge remote from the sleeve part 30 into a narrow cylindrical surface 32 in the axial direction, which in turn merges with the formation of an edge bead 34 into the essentially axially normal end face 36 of the ring part 28.
  • the edge bead 34 projects in the axial direction by a few tenths of a millimeter, preferably about 0.2 mm, over the annular end face 36.
  • a plurality of axially extending recesses or bores 38 are provided in the end face 36 at regular angular intervals (FIG. 3), which serve to save material and increase the deformability of the ring part 28.
  • grooves 42 which run obliquely to the axis, are arranged in a gun barrel, similar to the swirl trains, which are used to supply and distribute lubricants when the bearing bushes 18 are seated on the pull rod 12.
  • the bearing bushes 18 When mounting the bearing, the bearing bushes 18 are pressed with their cylindrical sleeve parts 30 into the bearing bore 14 of the bearing housing 16 until the conical surfaces 26 bear against the ring parts 28 on the contact surfaces 24 of the bearing housing 16. Then the pull rod 12 is pushed through the bores 40 of the two bearing bushes 18. The bearing rings are then clamped by a clamping nut 48, which can be screwed onto the free end 46 of the pull rod 12 provided with a thread 44, via two axially acting spring devices 50 and 52.
  • the spring device 50 which is close to the coupling head 10, comprises a rubber buffer 54 which, on the one hand, bears against an axially normal flange 56 which is formed in one piece with the coupling head 10 and, on the other hand, against the bottom 58 of a protective cap 60 which overlaps the rubber buffer 54 and is essentially axially normal.
  • the other side of the bottom 58 of the protective cap 60 bears against the front end of the bearing bush 18 on the left in FIG. 1.
  • the suspension device 52 on the other side of the bearing housing 16 also comprises a rubber buffer 62 which bears on the axially outer end face of the bearing bush 18 on the right in FIG. 1 via a protective cap 64 identical to the protective cap 60.
  • a pressure plate 66 is also mounted on the pull rod 12, the outer diameter of which corresponds approximately to the outer diameter of the rubber buffer 62.
  • the pressure plate 66 is seated on a conical section 68 of the tie rod 12 which widens towards the bearing housing 16, the through-hole 70 in the pressure plate 66 also being provided with a complementary conical surface over at least part of its axial extent, so that the pressure plate 66 is screwed on Nut 48 on the threaded end 46 of the tie rod 12 only so far can be pushed onto the tension rod 12 until the conical surface of the bore 70 in the pressure plate 66 bears against the conical surface 68 of the pull rod 12. This prevents the rubber buffers 54 and 62 from being squeezed together too much when the clamping nut 48 is tightened.
  • the length of the tie rod section between the flange 56 and the conical surface 68 and the axial dimensions of the parts mounted on the tie rod 12 are selected so that when the clamping nut 48 is tightened, the bearing bushes 18 are pressed firmly into the bearing bore 14 of the bearing housing 16. Due to the conically tapering towards the inside of the bearing housing 16 towards the contact surfaces 24, at least the ring 28 of the bearing bushes 18 are also pressed together in the radial direction, so that the originally existing diameter difference of 0.5 mm between the inside diameter of the bearing bushes 18 and the outside diameter of the Drawbar 12 reduced to about 0.1 to 0.2 mm. As a result, the pull rod 12 can still slide axially in the bearing bushes 18, but has no possibility of radial movement in the bearing housing 16.
  • the bearing bushes 18 are always so in the event of a gradual wear and tear Bearing bore 14 of the bearing housing 16 pressed in that, on the one hand, the conical surfaces 26 abut the contact surfaces 24 and, on the other hand, play between the tie rod 12 and the bearing housing 16 is avoided.
  • the above-mentioned small space between the mutually facing ends of the La gerbüchsen 18 can be provided in the bearing bore 14.
  • edge beads 34 When the protective caps 60 and 64 are pressed against the front ends of the bearing bushes 18, the edge beads 34 are first deformed until the protective caps lie flat against the end faces 36. As a result, the edge bead 34 acts as a sealing ring, which prevents water from penetrating into the bearing housing when the bearing ring is momentarily relieved when the pull rod 12 is axially displaced between this bearing ring and the protective cap in question.
  • the friction of the bearing bushes on the pull rod 12 means that the latter is constantly polished, so that condensation water forms in the remaining space between the bearing bushes 18 residual moisture cannot lead to rust formation on the pull rod 12.
  • a lubricant can be introduced through the grooves 42 on the inner peripheral surface of the bearing bushes 18.
  • the tie rod mounting according to the invention is practically maintenance-free and ensures reliable play-free guidance of the tie rod 12 until the bearing bushes 18 are worn out so that readjustment is no longer possible.
  • the clamping nut 48 is secured by a split pin 72.
  • the clamping nut itself can then still be covered by a protective cap 74, which engages with a bead-like edge 76 in the manner of a snap closure over an annular collar 78 on the protective cap 64.
  • the sleeve parts 30 not only protect the surface of the tie rod 12 against corrosion, but also cause an additional radial bearing for the tie rod 12 in the bearing housing 16. This effect is particularly evident when the conical ring parts 28 are subjected to very strong radial forces. In this case, the sleeve parts 18 cause a load limitation for the conical ring parts 28.
  • the rubber buffers 54 and 62 lie so close to the surface of the tie rod that water cannot penetrate into the bearing housing 16 even at these points.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Support Of The Bearing (AREA)
  • Mounting Of Bearings Or Others (AREA)
EP19780100075 1977-07-19 1978-06-01 Palier de fixation pour barre d'attelage Expired EP0000325B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19772732610 DE2732610C3 (de) 1977-07-19 1977-07-19 Lagerung für eine Zugstange einer Anhängerkupplung
DE2732610 1977-07-19

Publications (2)

Publication Number Publication Date
EP0000325A1 true EP0000325A1 (fr) 1979-01-24
EP0000325B1 EP0000325B1 (fr) 1981-08-05

Family

ID=6014300

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19780100075 Expired EP0000325B1 (fr) 1977-07-19 1978-06-01 Palier de fixation pour barre d'attelage

Country Status (2)

Country Link
EP (1) EP0000325B1 (fr)
DE (1) DE2732610C3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0213284A3 (en) * 1985-08-27 1988-10-19 Rockinger Spezialfabrik Fur Anhangerkupplungen Gmbh & Co. Mounting of the coupling element of a trailer draw-gear in the cross-member
GB2206856A (en) * 1987-03-20 1989-01-18 Stuart Fraser Towing bracket adapter
EP0433471A1 (fr) * 1989-12-18 1991-06-26 ROCKINGER Spezialfabrik für Anhängerkupplungen GmbH & Co. Dispositif d'attelage avec support d'attelage ayant un disque de butée nervuré
EP0457249A2 (fr) * 1990-05-14 1991-11-21 ROCKINGER Spezialfabrik für Anhängerkupplungen GmbH & Co. Attelage de remorque mot clef: dispositif antiperte avec distance de sécurité
EP1527910A1 (fr) * 2003-10-29 2005-05-04 Schnabl, Peter Attelage de remorque

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE849044C (de) * 1942-02-27 1952-09-11 Ehrenreich & Cie A Gestaenge mit Abfederung
FR1131515A (fr) * 1952-02-08 1957-02-22 A C F Ind Dispositif d'attelage pour véhicules ferroviaires
US3169783A (en) * 1962-07-30 1965-02-16 Western Unit Corp Drawbar hitch assembly
DE1241278B (de) * 1962-08-16 1967-05-24 Ade Werk G M B H Federnd gelagerte Anhaengerkupplung
DE2206617A1 (de) * 1972-02-11 1973-08-23 Rockinger Spezial Fab Joh Anhaengerkupplung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE849044C (de) * 1942-02-27 1952-09-11 Ehrenreich & Cie A Gestaenge mit Abfederung
FR1131515A (fr) * 1952-02-08 1957-02-22 A C F Ind Dispositif d'attelage pour véhicules ferroviaires
US3169783A (en) * 1962-07-30 1965-02-16 Western Unit Corp Drawbar hitch assembly
DE1241278B (de) * 1962-08-16 1967-05-24 Ade Werk G M B H Federnd gelagerte Anhaengerkupplung
DE2206617A1 (de) * 1972-02-11 1973-08-23 Rockinger Spezial Fab Joh Anhaengerkupplung

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0213284A3 (en) * 1985-08-27 1988-10-19 Rockinger Spezialfabrik Fur Anhangerkupplungen Gmbh & Co. Mounting of the coupling element of a trailer draw-gear in the cross-member
GB2206856A (en) * 1987-03-20 1989-01-18 Stuart Fraser Towing bracket adapter
EP0433471A1 (fr) * 1989-12-18 1991-06-26 ROCKINGER Spezialfabrik für Anhängerkupplungen GmbH & Co. Dispositif d'attelage avec support d'attelage ayant un disque de butée nervuré
EP0457249A2 (fr) * 1990-05-14 1991-11-21 ROCKINGER Spezialfabrik für Anhängerkupplungen GmbH & Co. Attelage de remorque mot clef: dispositif antiperte avec distance de sécurité
EP0457249A3 (en) * 1990-05-14 1993-01-20 Rockinger Spezialfabrik Fuer Anhaengerkupplungen Gmbh & Co. Trailer coupling key word: securing device with mechanical play
EP1527910A1 (fr) * 2003-10-29 2005-05-04 Schnabl, Peter Attelage de remorque

Also Published As

Publication number Publication date
DE2732610C3 (de) 1980-12-04
DE2732610B2 (de) 1980-04-10
DE2732610A1 (de) 1979-02-01
EP0000325B1 (fr) 1981-08-05

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