FR2573496A1 - Flexible bearing, especially for a rack bar - Google Patents

Flexible bearing, especially for a rack bar Download PDF

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Publication number
FR2573496A1
FR2573496A1 FR8417679A FR8417679A FR2573496A1 FR 2573496 A1 FR2573496 A1 FR 2573496A1 FR 8417679 A FR8417679 A FR 8417679A FR 8417679 A FR8417679 A FR 8417679A FR 2573496 A1 FR2573496 A1 FR 2573496A1
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FR
France
Prior art keywords
bearing
bar
housing
sleeve
reliefs
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
FR8417679A
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French (fr)
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FR2573496B1 (en
Inventor
Lucio De Bortoli
Raymond Taillefert
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.)
Automobiles Peugeot SA
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Automobiles Peugeot SA
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 Automobiles Peugeot SA filed Critical Automobiles Peugeot SA
Priority to FR8417679A priority Critical patent/FR2573496B1/en
Publication of FR2573496A1 publication Critical patent/FR2573496A1/en
Application granted granted Critical
Publication of FR2573496B1 publication Critical patent/FR2573496B1/en
Expired legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D3/00Steering gears
    • B62D3/02Steering gears mechanical
    • B62D3/12Steering gears mechanical of rack-and-pinion type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C27/00Elastic or yielding bearings or bearing supports, for exclusively rotary movement
    • F16C27/02Sliding-contact bearings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02Parts of sliding-contact bearings
    • F16C33/04Brasses; Bushes; Linings
    • F16C33/20Sliding surface consisting mainly of plastics

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Support Of The Bearing (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

Device for guiding a bar 1 in one tubular end 4 of a casing 5, the bar 1 being for example a steering rack bar for a motor vehicle, comprising a bearing 3 made of synthetic material comprising an inner bush 2 receiving the bar 1 and a centring bush 6 fitted into a bore 7 in the tubular end 4 and connected to the inner bush 2 by a radial annular portion 10 of the bearing 3, characterised in that, the said tubular end 4 being equipped with a peripheral bead 9, the bearing 3 further comprises an external bush 8, one end of which is free and the other end of which is connected to the centring bush 6 via a radial portion 12 outside the casing 5, this outer bush 8 enveloping the bead 9 and being attached to it by internal reliefs 13 with which its free end is provided.

Description

L'invention est relative aux paliers de guidage d'une barre. telle qu'une barre de crémaillère reliée à des organes de direction d'un vehicule au automobile, et plus particulièrement à ceux de ces paliers qui sont fixés à une extrémité d'un boîtier contenant une partie de la barre et qui présentent une légère souplesse autorisant de légers déplacements radiaux et angulaires de la barre par rapport au boîtier, et procurant un filtrage des vibrations ou des chocs transmis de la barre au boîtier. The invention relates to the guide bearings of a bar. such as a rack bar connected to steering members of a vehicle in a motor vehicle, and more particularly to those of these bearings which are fixed to one end of a housing containing part of the bar and which have a slight flexibility allowing slight radial and angular movements of the bar relative to the housing, and providing a filtering of vibrations or shocks transmitted from the bar to the housing.

Un dispositif connu (brevet FR. 1 498 601) comporte un tel palier souple. dont la fixation au boîtier est réalisée par emmanchement dans un alésage du boitier et par maintien axial, contre un épaulement délimitant le fond de l'alésage. au moyen d'une rondelle métallique elle-meme maintenue par sertissage de l'extrémité du boitier. Cette rondelle peut aussi etre maintenue par un jonc élastique engagé dans une gorge circulaire agencée dans le boitier au bord externe de l'alésage. Ces deux modes de fixation s'avèrent relativement onéreux, en particulier pour l'application sur des vehicules réalisés en grande série, en raison d'une part de l'adjonction de la rondelle et éventuellement du jonc élastique, d'autre part de l'opération de sertissage du boitier ou d'usinage de la gorge. A known device (patent FR. 1,498,601) includes such a flexible bearing. whose attachment to the housing is achieved by fitting into a bore of the housing and by axial retention, against a shoulder defining the bottom of the bore. by means of a metal washer itself held by crimping the end of the case. This washer can also be held by an elastic ring engaged in a circular groove arranged in the housing at the outer edge of the bore. These two fixing methods prove to be relatively expensive, in particular for the application on vehicles produced in large series, due on the one hand to the addition of the washer and possibly of the elastic ring, on the other hand to the crimping of the case or machining of the groove.

On connait aussi (brevet FR. 1 422 619) un palier en matière synthétique dont la fixation à un corps est réalisée par ancrage de la surface externe du palier dans un alésage du corps, cette surface externe etant profilée de manière à s'accrocher par déformation élastique dans l'alésage. Cette disposition implique un dimensionnement relativement important de l'alésage. donc de l'extrémité correspon dante du boîtier. Son adaptation à une barre de crémaillère de direction de véhicule conduirait à un boitier de poids et d'encombrement excessifs. There is also known (patent FR. 1 422 619) a bearing made of synthetic material, the attachment to a body is carried out by anchoring the external surface of the bearing in a bore of the body, this external surface being profiled so as to hang by elastic deformation in the bore. This arrangement implies a relatively large dimensioning of the bore. therefore from the corresponding end of the housing. Its adaptation to a vehicle steering rack bar would lead to a box of excessive weight and size.

L'invention a pour but de réaliser le guidage d'une barre, telle qu'une barre de crémaillère de direction pour véhicule automobile, au moyen d'un palier souple fixé de façon simple et peu onereuse à une extrémité d'un boitier de faible dimension radiale. The object of the invention is to guide a bar, such as a steering rack bar for a motor vehicle, by means of a flexible bearing fixed in a simple and inexpensive manner at one end of a housing. small radial dimension.

Le dispositif visé par l'invention, destiné au guidage d'une barre dans une extrémité tubulaire d'un boîtier, comprend un palier en matière synthétique comportant une douille intérieure recevant la barre, et une douille de centrage emmanchée dans un alésage de l'extrémité tubulaire et reliée à la douille intérieure par une portion annulaire radiale du palier. The device contemplated by the invention, intended for guiding a bar in a tubular end of a housing, comprises a bearing in synthetic material comprising an inner bush receiving the bar, and a centering bush fitted in a bore of the tubular end and connected to the inner sleeve by a radial annular portion of the bearing.

Suivant l'invention, ladite extrémité tubulaire étant munie d'un bourrelet périphérique, le palier comporte en outre une douille extérieure dont une extrémité est libre et l'autre extrémité est reliée à la douille de centrage par une portion radiale exterieure au boîtier, la douille extérieure enveloppant le bourrelet et s'y accrochant par des reliefs intérieurs dont son extrémité libre est munie. According to the invention, said tubular end being provided with a peripheral bead, the bearing further comprises an external sleeve, one end of which is free and the other end is connected to the centering sleeve by a radial portion external to the housing, the outer sleeve enveloping the bead and clinging thereto by interior reliefs with which its free end is provided.

Selon une caractéristique avantageuse de l'invention, ladite portion radiale extérieure au boitier est percée d'ouvertures situées respectivement au droit de chacun desdits reliefs. According to an advantageous characteristic of the invention, said radial portion outside the housing is pierced with openings located respectively at the right of each of said reliefs.

Un exemple non limitatif de réalisation d'un dispositif de guidage à palier souple selon l inven- tion est décrit ci-après, aoec référence a-ux dessins annexés, parmi lesquels
- la Figure 1 est une vue en élévation frontale d'un mode de réalisation du palier entrant dans le dispositif de guidage selon l'invention;
- et la Figure 2 est une vue en coupe axiale du dispositif suivant II-II de la Figure 1.
A nonlimiting example of embodiment of a flexible bearing guide device according to the invention is described below, with reference to the accompanying drawings, among which
- Figure 1 is a front elevational view of an embodiment of the bearing entering the guide device according to the invention;
- And Figure 2 is an axial sectional view of the device along II-II of Figure 1.

On voit aux Figures 1 et 2 une portion de barre 1 coulissant dans une douille intérieure -2 d'un palier 3 en matière synthétique légèrement souple fixé a' l'extrémité tubulaire 4 d'un boitier 5, la barre 1 pouvant être par exemple une barre de crémaillére reliée à des organes de direction (non représentés > d'un véhicule automobile. We see in Figures 1 and 2 a portion of bar 1 sliding in an inner sleeve -2 of a bearing 3 of slightly flexible synthetic material attached to the tubular end 4 of a housing 5, the bar 1 can be for example a rack bar connected to steering members (not shown> of a motor vehicle.

Le palier 3 est constitué, en plus de la douille intérieure 2, d'une douille de centrage 6 emmanchée dans un alésage 7 de l'extrémité 4 du boitier 5, et d'une douille extérieure 8 enveloppant un bourrelet périphérique 9 agencé sur l'extrémité 4 du boitier 5 pres de son bord 4a. The bearing 3 consists, in addition to the inner sleeve 2, a centering sleeve 6 fitted into a bore 7 of the end 4 of the housing 5, and an outer sleeve 8 enveloping a peripheral bead 9 arranged on the end 4 of the housing 5 near its edge 4a.

La douille de centrage 6 est reliée, d'une part à la douille intérieure 2 par une portion radiale 10 prenant appui sur un épaulement intérieur 11 constituant le fond de l'alésage 7, d'autre part à l'une des deux extrémités de la douille intérieure 8 par une portion radiale 12 -extérieure au boitier 5. The centering sleeve 6 is connected, on the one hand to the inner sleeve 2 by a radial portion 10 bearing on an inner shoulder 11 constituting the bottom of the bore 7, on the other hand to one of the two ends of the inner sleeve 8 by a radial portion 12 -external to the housing 5.

L'autre extrémité de la douille 8 est libre et munie de six reliefs intérieurs 13 uniformément répartis, s'accrochant au bourrelet 9 sur une face terminale 14 de celui-ci opposée au bord 4a du boitier 5. Le maintien axial du palier 3 est ainsi obtenu dans un sens par butée de la portion radiale 10 sur l'épaulement 11, et dans l'autre sens par coopération des reliefs 53 avec la face 14. The other end of the sleeve 8 is free and provided with six interior reliefs 13 uniformly distributed, clinging to the bead 9 on an end face 14 thereof opposite the edge 4a of the housing 5. The axial support of the bearing 3 is thus obtained in one direction by abutment of the radial portion 10 on the shoulder 11, and in the other direction by cooperation of the reliefs 53 with the face 14.

La portion radiale 12 comporte six ouvertures 15 situées chacune au droit d'un des reliefs 13 et ayant, en vue frontale comme sur la Figure 1, une largeur L légèrement supérieure à celle de chaque relief 13. Il en résulte une possibilité de déformation de la douille 8 suffisante pour que les reliefs 13 puissent s'écarter de l'axe de l'alésage 7 en glissant sur le bourrelet 9 lors du montage du palier 3 par emmanchement de la douille 6 dans l'alésage 7. The radial portion 12 has six openings 15 each located in line with one of the reliefs 13 and having, in front view as in FIG. 1, a width L slightly greater than that of each relief 13. This results in a possibility of deformation of the sleeve 8 sufficient for the reliefs 13 to be able to move away from the axis of the bore 7 by sliding on the bead 9 during the mounting of the bearing 3 by fitting the sleeve 6 into the bore 7.

Pour faciliter l'emmanchement de la douille 8 sur le bourrelet 9, la périphérie de celui-ci est tronconique, de plus faible dimension radiale vers le bord 4a, et la face des reliefs 13 tournée vers la barre 1 est inclinée dans le sens approprié, comme visible à la
Figure 2. Une plus grande possibilité de déformation de la douille 8 peut être obtenue, en variante, en remplaçant les ouvertures 15 par des fentes parallèles à la barre 1, agencées dans la douille 8 entre les reliefs 13. Mais la disposition représentée est préférée car elle procure, grace à une plus grande rigidité de la douille 8, une fixation plus sure du palier 3 sur le boitier 5.
To facilitate the fitting of the socket 8 on the bead 9, the periphery of the latter is frustoconical, of smaller radial dimension towards the edge 4a, and the face of the reliefs 13 facing the bar 1 is inclined in the appropriate direction , as visible on the
Figure 2. A greater possibility of deformation of the socket 8 can be obtained, as a variant, by replacing the openings 15 with slots parallel to the bar 1, arranged in the socket 8 between the reliefs 13. But the arrangement shown is preferred because it provides, thanks to the greater rigidity of the sleeve 8, a more secure fixing of the bearing 3 on the housing 5.

Le dispositif proposé assure une liaison souple, propre à filtrer des vibrations et à autoriser de légères déviations radiales et/ou angulaires entre la barre 1 et le boitier 5, grace à la portion radiale 10 légèrement déformable reliant les douilles 2 et 6. The proposed device provides a flexible connection, suitable for filtering vibrations and allowing slight radial and / or angular deviations between the bar 1 and the housing 5, thanks to the slightly deformable radial portion 10 connecting the sockets 2 and 6.

Sa réalisation est peu onéreuse, non seulement grâce à la mise en place rapide du palier 3 par simple coulissement axial jusqu'à accrochage des reliefs 13 sur le bourrelet 9, mais aussi puisque le dispositif ne comporte pas de pièce annexe de fixation et n'implique pas d'usinage ou d'ajustement précis, notamment gracie à la possibilité de légère déformation des douilles, qui peuvent ne pas être tout à fait cylindriques quand le palier 3 est à l'état libre. It is inexpensive to produce, not only thanks to the rapid installation of the bearing 3 by simple axial sliding until the reliefs 13 are attached to the bead 9, but also since the device does not include an attachment attachment part and does not involves no machining or precise adjustment, in particular thanks to the possibility of slight deformation of the bushings, which may not be completely cylindrical when the bearing 3 is in the free state.

Enfin, le nombre des reliefs et des ouvertures 15 peut évidemment varier.  Finally, the number of reliefs and openings 15 can obviously vary.

Claims (3)

REVENDICATIONS 1 - Dispositif de guidage d'une barre (1) dans une extrémité tubulaire (4) d'un boitier (5), la barre (1) étant par exemple une barre de crémaillére de direction pour véhicule automobile, comprenant un palier (3) en matière synthétique comportant une douille intérieure (2) recevant la barre (1) et une douille (6) de centrage emmanchée dans un alésage (7) de 1 extrémité tubulaire (4) et reliée à la douille intérieure (2) par une portion annulaire radiale (10) du palier (3), caractérisé en ce que, ladite extrémité tubulaire !4) étant munie d'un bourrelet périphérique (9), le palier (3) comporte en outre une douille ex térieure (8) dont une extrémité est libre et l'autre extrémité est reliée à la douille (6) de centrage par une portion radiale (12) extérieure au boitier (5), cette douille extérieure (8) enveloppant le bourrelet (9) et s'y accrochant par des reliefs intérieurs (13) dont son extrémité libre est munie. 1 - Device for guiding a bar (1) in a tubular end (4) of a housing (5), the bar (1) being for example a steering rack bar for a motor vehicle, comprising a bearing (3 ) made of synthetic material comprising an inner sleeve (2) receiving the bar (1) and a centering sleeve (6) fitted in a bore (7) with 1 tubular end (4) and connected to the inner sleeve (2) by a radial annular portion (10) of the bearing (3), characterized in that, said tubular end! 4) being provided with a peripheral bead (9), the bearing (3) further comprises an external bush (8) of which one end is free and the other end is connected to the centering sleeve (6) by a radial portion (12) external to the housing (5), this external sleeve (8) enveloping the bead (9) and hanging thereon by internal reliefs (13) with which its free end is provided. 2 - Dispositif selon la revendication 1, caractérisé en ce que la portion radiale (12) extérieure au boitier (5) est percee d'ouvertures (15) situées respectivement au droit de chacun desdits reliefs (13). 2 - Device according to claim 1, characterized in that the radial portion (12) external to the housing (5) is pierced with openings (15) located respectively at the right of each of said reliefs (13). 3 - Dispositif selon la revendication 2, caractérisé en ce que les ouvertures (15) ont une largeur (L) légèrement supérieure à celle de chaque relief (13), d'où résulte une possibilité de déformation de la douille extérieure (8) suffisante pour que les reliefs (13) puissent s'écarter de l'axe de l alésage (7) en glissant sur le bourrelet (9) lors du montage du palier (3) sur le boitier (5).  3 - Device according to claim 2, characterized in that the openings (15) have a width (L) slightly greater than that of each relief (13), resulting in a possibility of deformation of the outer sleeve (8) sufficient so that the reliefs (13) can move away from the axis of the bore (7) by sliding on the bead (9) when mounting the bearing (3) on the housing (5).
FR8417679A 1984-11-20 1984-11-20 FLEXIBLE BEARING, ESPECIALLY FOR RACK BAR Expired FR2573496B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8417679A FR2573496B1 (en) 1984-11-20 1984-11-20 FLEXIBLE BEARING, ESPECIALLY FOR RACK BAR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8417679A FR2573496B1 (en) 1984-11-20 1984-11-20 FLEXIBLE BEARING, ESPECIALLY FOR RACK BAR

Publications (2)

Publication Number Publication Date
FR2573496A1 true FR2573496A1 (en) 1986-05-23
FR2573496B1 FR2573496B1 (en) 1987-02-06

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015007655A1 (en) * 2013-07-16 2015-01-22 Tedrive Steering Systems Gmbh Steering system with an improved arrangement of supporting bearing and bellows
CN110886788A (en) * 2018-09-07 2020-03-17 Dmc 股份有限公司 Damping bush for steering mechanism of vehicle

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1208127A (en) * 1957-12-06 1960-02-22 Unilever Nv Sliding bearing
FR1563134A (en) * 1968-02-27 1969-04-11
GB1337523A (en) * 1971-05-12 1973-11-14 Ford Motor Co Rack and pinion steering gear
FR2186091A5 (en) * 1972-05-19 1974-01-04 Cam Gears Ltd
US3788159A (en) * 1972-10-30 1974-01-29 Gen Motors Corp Rack and pinion steering gear
US4050831A (en) * 1976-09-15 1977-09-27 Outboard Marine Corporation Unitary bushing and retainer assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1208127A (en) * 1957-12-06 1960-02-22 Unilever Nv Sliding bearing
FR1563134A (en) * 1968-02-27 1969-04-11
GB1337523A (en) * 1971-05-12 1973-11-14 Ford Motor Co Rack and pinion steering gear
FR2186091A5 (en) * 1972-05-19 1974-01-04 Cam Gears Ltd
US3788159A (en) * 1972-10-30 1974-01-29 Gen Motors Corp Rack and pinion steering gear
US4050831A (en) * 1976-09-15 1977-09-27 Outboard Marine Corporation Unitary bushing and retainer assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015007655A1 (en) * 2013-07-16 2015-01-22 Tedrive Steering Systems Gmbh Steering system with an improved arrangement of supporting bearing and bellows
CN105531176A (en) * 2013-07-16 2016-04-27 tedrive转向系统股份有限公司 Steering system with an improved arrangement of supporting bearing and bellows
CN105531176B (en) * 2013-07-16 2018-04-20 tedrive转向系统股份有限公司 The application of transfer, steering and steering in the car
CN110886788A (en) * 2018-09-07 2020-03-17 Dmc 股份有限公司 Damping bush for steering mechanism of vehicle

Also Published As

Publication number Publication date
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