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WO2001061208A1 - Manchon resilient - Google Patents

Manchon resilient Download PDF

Info

Publication number
WO2001061208A1
WO2001061208A1 PCT/GB2000/000567 GB0000567W WO0161208A1 WO 2001061208 A1 WO2001061208 A1 WO 2001061208A1 GB 0000567 W GB0000567 W GB 0000567W WO 0161208 A1 WO0161208 A1 WO 0161208A1
Authority
WO
WIPO (PCT)
Prior art keywords
accordance
resilient bush
flange
annular
support member
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.)
Ceased
Application number
PCT/GB2000/000567
Other languages
English (en)
Inventor
Peter Thomas Court
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.)
BTR Industries Ltd
Trelleborg AB
Original Assignee
BTR Industries Ltd
Trelleborg AB
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 BTR Industries Ltd, Trelleborg AB filed Critical BTR Industries Ltd
Priority to PCT/GB2000/000567 priority Critical patent/WO2001061208A1/fr
Priority to AU25630/00A priority patent/AU2563000A/en
Publication of WO2001061208A1 publication Critical patent/WO2001061208A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
    • F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
    • F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
    • F16F13/08—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper
    • F16F13/14—Units of the bushing type, i.e. loaded predominantly radially

Definitions

  • This invention relates to a resilient bush and in particular, although not exclusively, to a resilient bush which contains hydraulic fluid to provide a damping action.
  • the invention provides also a resilient bush, such as a resilient bush having hydraulic damping, which is suitable for use in a vehicle suspension.
  • Hydraulically damped resilient bushes are well known for use in vehicle suspensions but their use often is limited by cost considerations, particularly for lower cost, high volume production vehicles.
  • One object of the present invention is to provide a resilient bush, which may be of the hydraulically damped type, which is relatively low in cost.
  • a resilient bush comprises an inner rigid member, a substantially cylindrical outwardly facing surface defined by said inner rigid member, an outer support member which extends around and is spaced from the inner rigid member to define an annular space therebetween, a substantially cylindrical inwardly facing surface defined by said outer support member, an inner support member which extends around and is in substantially direct contact with the outwardly facing surface defined by the inner rigid member, and an annular bonded element of resilient elastome ⁇ c material located between and bonded to confronting surfaces of said inner and said outer support members.
  • the inner support member may be swageable whereby, on assembly, the elastome ⁇ c element becomes loaded in compression, or loaded with additional compression, as the inner support member is force-fitted axially over the cylindrical surface of an inner rigid member of greater diameter than the initial internal diameter of the inner support member.
  • the outer support member may be axially locatable in an outer rigid member, such as a bush housing defined by a vehicle suspension component, and may be swageable to reduce in diameter and apply (additional) compression to the elastome ⁇ c element during axial movement upon assembly.
  • An auxiliary, second elastoneric element may be provided in the resilient bush and at least in part mvy lie axially spaced from said annular bonded element of elastomeric material.
  • the second element may be bonded to an auxiliary inner support member, which may extend around and be in substantially direct contact with the inner rigid member. It may be bonded to an auxiliary outer support member, or it may be otherwise fluid- tightly secured directly or indirectly to an outer support member. It may be clamped in fluid tight manner against or relative to an axial extension of that outer support member to which the annular bonded element is bonded.
  • the auxiliary elastome ⁇ c element may be axially spaced from at least a part of said annular bonded elastome ⁇ c element to define therebetween an annular fluid chamber which may contain hydraulic fluid for providing a damping effect.
  • One of the inner rigid member and an outer support member or other non- elastomeric member surrounding and spaced from the inner rigid member may be provided with a radially extending flange which extends radially inwardly or outwardly from one of the (substantially) rigid members to the other .
  • the flange extends radially outwardly from the inner rigid member at a position between the axial ends of the inner rigid member.
  • the flange may form at least in part a boundary between two separate zones of the annular fluid chamber. Said zones may be interconnected by a fluid passage formed in and/or defined at least in part by the flange.
  • the fluid passage may comprise an axially extending portion and a circumferentially or likewise (e.g. spirally) extending portion.
  • the circu ferentially extending portion may be defined at least in part by material of the flange or by a separate annular cover that defines at least in part a passage in communication with the axially extending portion and in fluid communication with one of said zones of the annular fluid chamber.
  • An end of the inner support member to which the annular bonded element is bonded, or an end of the auxiliary inner support member, may extend radially outwardly and be disposed in proximity to an axially facing surface of the flange to contact an annular cover and thereby hold said cover in substantially fluid tight contact with the flange face and/or axial flow passage extendirg through the flange.
  • At least the auxiliary, secori elastomeric element may comprise an embedded reinforcement, such as a pressed metal member, or a plastics insert.
  • a suitable material for the support members is pressed steel.
  • a suitable material for the inner rigid member is steel, or aluminium or relatively rigid plastics.
  • the inner rigid member may be substantially tubular.
  • Figure 1 is a longitudinal cross-section of a resilient hydraulic bush of a first embodiment of the invention
  • Figure 2 is a view corresponding to that of Figure 1 of a bush in accordance with another embodiment
  • Figure 3 is a view of a modified form of the bush of Figure 2
  • Figures 4 and 5 are each views in longitudinal cross-section of other embodiments of resilient hydraulic bushes in accordance with the invention.
  • the bushes of Figures 1 to 5 are each substantially circular in cross- section as viewed in a plane perpendicular to the axis X-X, the major axis of the bush.
  • the bush 10 comprises a tubular inner rigid member 11 of a forged steel and having, between its end regions, an integral radially outwardly extending flange 21.
  • the cylindrical outer surface of the member 11, lying to the right of the flange 21, carries a pressed steel inner sleeve 19 to which an annular bonded element 20 of rubber is bonded.
  • Radially outwardly the element 20 is bonded to part of the axial length of an outer support member 15 of pressed steel and having a stepped outer diameter.
  • the outer support member 15 extends axially over, and spaced from, the radially outer edge of the flange 21.
  • the bonded element 20 extends at 25 axially between the outer edge of the flange 21 and outer member 15 to provide a fluid tight seal therebetween.
  • An auxiliary, second annular element 13 is positioned around the inner rigid member 11, at the other side of the flange from the side facing the annular bonded element 20.
  • the element 13 is bonded to an auxiliary inner support member 12, and at a radially outwards region contains an embedded pressed steel reinforcement 14.
  • the outer support member 15 is swaged inwards to compress against the reinforcement 14 that rubber material of the element 13 which lies outwards of the reinforcement 14.
  • the rubber elements 13,20 are each, in part, spaced axially from a respective axially facing surface of the flange 21 so as to define two fluid chamber zones 16a, 16b which contain hydraulic fluid.
  • the two zones are interconnected by a first fluid passage section 17 that extends axially through the flange and a second fluid passage section 24 which extends circumferentially about the axis X-X and communicates with zone 16b at a position diametrically opposite the passage section 17.
  • the second fluid passage section 24 is formed as a channel in a face of a moulded nylon cover 18. Cover 18 is held substantially fluid tightly against a flange face by an outwardly extending lip 26 provided at one end of the inner sleeve 19.
  • Axial location of the sleeve 19, and also auxiliary support member 12, on the inner rigid member 11 is achieved by a friction fit on assembly (which may be due to a swaging action) and/or by external components such as a nut or a bolt head associated with a location bolt (not shown) that extends through the bore of the member 11 to secure the bush to part of a suspension assembly.
  • annular fluid passage section 24' is formed by an annular channel machined or cast in a face of the flange 21.
  • the channel is covered by plane faced plastics cover 18 ' , similarly held in position by being axially interposed, at its radially inner edge region, between the flange and the lip section 26' of the inner sleeve 19.
  • Figure 3 shows a modification of Figure 2 in which an alternative sealing arrangement is employed to resist a direct flow of fluid from one chamber 16a to the other 16b via a path extending over the outer radial edge of the flange 21.
  • the modification comprises forming the flange 21 with a pair of bevelled edges 41 close to the radially outer edge of the flange, and providing each elastomeric moulding 13,20 with a flexible lip 42,43 that seals on a respective bevel edge.
  • An intermediate fluid separation chamber 44 is formed around the outer edge of the flange.
  • the lip seals 42,43 act as one-way valves and during relative longitudinal movement of the inner and outer members 11,15 they allow pressurised fluid to enter the chamber 44 from one of the zones 16a,16b. That pressurised fluid acts on the lip seals to maintain them firmly loaded against the flange and thereby firmly resist any tendency for fluid to flow between the zones 16a,16b via the outer edge of the flange 21.
  • Figure 4 shows a construction in which the auxiliary second element 13 of Figure 1, which is bonded to inner member 12, is replaced by an unbonded resilient member in the form of an annular rubber diaphragm 4.
  • diaphragm 4 The inner edge of diaphragm 4 is sealmgly clamped to inner member 1 by a pressed steel sleeve 2.
  • the axially outer surface 12 of the diaphragm is supported at a radially outer region 13 by an annular steel pressing 3 which is held captive by tabs 14 which are bent inwards from the position of Figure 4. Pressing 3 thereby compresses an outer zone of the diaphragm to provide a fluid tight seal against the outer member 5.
  • the Figure 4 construction embodies lipseals and an intervening fluid chamber similar to the seals 42,43 and chamber 44 of Figure 3.
  • the portion of the outer member 5 surrounding the inner sleeve 11 is of generally reduced diameter as also featured in Figure 3.
  • Figure 5 shows a construction having a moulded plastic outer body 12 with a substantially cylindrical outer surface 17 for location in a tubular outer sleeve 14 that fits into a housing member 16.
  • the body 12 has an inner sleeve portion 18 supported relative to the outer part of the body by a series of circumferentially spaced and radially extending webs 19.
  • auxiliary elastomeric member 4 of this embodiment is bonded to sleeve 3. It is held captive by annular ring 5 which is secured by bent tags 20 of outer sleeve 14.
  • the invention contemplates also a reversed configuration in which the inner rigid member lies radially outwards of the aforedescribed outer members with the flange thereof extending radially inwards towards a support member corresponding, for example, to the aforedescribed support member 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Devices Of Dampers And Springs (AREA)

Abstract

La présente invention concerne un manchon résilient comprenant un élément rigide interne (11), une surface sensiblement cylindrique dirigée vers l'extérieur définie par ledit élément rigide interne (11), un élément de support externe (15) qui s'étend autour et est espacé de l'élément rigide interne pour définir un espace annulaire entre les deux éléments, une surface sensiblement cylindrique dirigée vers l'intérieur définie par ledit élément de support externe, un élément de support interne (12) qui s'étend autour et se trouve sensiblement en contact direct avec la surface dirigée vers l'extérieur définie par l'élément rigide interne, et un élément annulaire non amovible constitué d'un matériau élastomère résilient (20, 13), se trouvant entre les surfaces opposées desdits éléments interne et externe de support (12, 15) tout en étant relié à ces surfaces.
PCT/GB2000/000567 2000-02-17 2000-02-17 Manchon resilient Ceased WO2001061208A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/GB2000/000567 WO2001061208A1 (fr) 2000-02-17 2000-02-17 Manchon resilient
AU25630/00A AU2563000A (en) 2000-02-17 2000-02-17 Resilient bush

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/GB2000/000567 WO2001061208A1 (fr) 2000-02-17 2000-02-17 Manchon resilient

Publications (1)

Publication Number Publication Date
WO2001061208A1 true WO2001061208A1 (fr) 2001-08-23

Family

ID=9883503

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/000567 Ceased WO2001061208A1 (fr) 2000-02-17 2000-02-17 Manchon resilient

Country Status (2)

Country Link
AU (1) AU2563000A (fr)
WO (1) WO2001061208A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2839763A1 (fr) * 2002-05-16 2003-11-21 Freudenberg Carl Kg Palier en caoutchouc
FR2840042A1 (fr) * 2002-05-24 2003-11-28 Freudenberg Carl Kg Support en caoutchouc a amortissement hydraulique

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044908A2 (fr) * 1980-07-29 1982-02-03 Boge GmbH Manchon élastique en caoutchouc à chargement axial
JPS5794146A (en) * 1980-12-02 1982-06-11 Kinugawa Rubber Ind Co Ltd Manufacture of bushing type anti-vibration device supporter
US4741521A (en) * 1985-05-25 1988-05-03 Boge Gmbh Axially-loadable bearing
EP0386735A1 (fr) * 1989-03-09 1990-09-12 Tokai Rubber Industries, Ltd. Support supérieur pour amortisseur de chocs dans un système de suspension
US5069431A (en) * 1987-10-19 1991-12-03 Nissan Motor Company, Limited Bush assembly
US5170997A (en) * 1989-11-30 1992-12-15 Hutchinson Resilient articulation with variable stiffness
US5195728A (en) * 1990-03-31 1993-03-23 Btr Plc Elastomeric mounting with fluid damping
US5474284A (en) * 1990-10-22 1995-12-12 Firma Carl Freudenberg Single-thrust bearing for a shock absorber
GB2345114A (en) * 1998-12-24 2000-06-28 Btr Industries Ltd Resilient bush

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044908A2 (fr) * 1980-07-29 1982-02-03 Boge GmbH Manchon élastique en caoutchouc à chargement axial
JPS5794146A (en) * 1980-12-02 1982-06-11 Kinugawa Rubber Ind Co Ltd Manufacture of bushing type anti-vibration device supporter
US4741521A (en) * 1985-05-25 1988-05-03 Boge Gmbh Axially-loadable bearing
US5069431A (en) * 1987-10-19 1991-12-03 Nissan Motor Company, Limited Bush assembly
EP0386735A1 (fr) * 1989-03-09 1990-09-12 Tokai Rubber Industries, Ltd. Support supérieur pour amortisseur de chocs dans un système de suspension
US5170997A (en) * 1989-11-30 1992-12-15 Hutchinson Resilient articulation with variable stiffness
US5195728A (en) * 1990-03-31 1993-03-23 Btr Plc Elastomeric mounting with fluid damping
US5474284A (en) * 1990-10-22 1995-12-12 Firma Carl Freudenberg Single-thrust bearing for a shock absorber
GB2345114A (en) * 1998-12-24 2000-06-28 Btr Industries Ltd Resilient bush

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 187 (M - 158) 25 September 1982 (1982-09-25) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2839763A1 (fr) * 2002-05-16 2003-11-21 Freudenberg Carl Kg Palier en caoutchouc
DE10222217A1 (de) * 2002-05-16 2003-12-04 Freudenberg Carl Kg Gummilager
FR2840042A1 (fr) * 2002-05-24 2003-11-28 Freudenberg Carl Kg Support en caoutchouc a amortissement hydraulique
DE10223303A1 (de) * 2002-05-24 2003-12-18 Freudenberg Carl Kg Hydraulisch dämpfendes Gummilager

Also Published As

Publication number Publication date
AU2563000A (en) 2001-08-27

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