GB2289109A - Spring/damper unit mounting arrangement - Google Patents

Spring/damper unit mounting arrangement Download PDF

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Publication number
GB2289109A
GB2289109A GB9408528A GB9408528A GB2289109A GB 2289109 A GB2289109 A GB 2289109A GB 9408528 A GB9408528 A GB 9408528A GB 9408528 A GB9408528 A GB 9408528A GB 2289109 A GB2289109 A GB 2289109A
Authority
GB
United Kingdom
Prior art keywords
spring
damper
mounting plate
washer
elastomeric
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
GB9408528A
Other versions
GB2289109B (en
GB9408528D0 (en
Inventor
Mark Morgan
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.)
Jaguar Land Rover Ltd
Original Assignee
Jaguar Cars Ltd
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 Jaguar Cars Ltd filed Critical Jaguar Cars Ltd
Priority to GB9408528A priority Critical patent/GB2289109B/en
Publication of GB9408528D0 publication Critical patent/GB9408528D0/en
Publication of GB2289109A publication Critical patent/GB2289109A/en
Application granted granted Critical
Publication of GB2289109B publication Critical patent/GB2289109B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
    • B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
    • B60G15/067—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper characterised by the mounting on the vehicle body or chassis of the spring and damper unit
    • B60G15/068—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper characterised by the mounting on the vehicle body or chassis of the spring and damper unit specially adapted for MacPherson strut-type suspension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/12—Wound spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/14—Plastic spring, e.g. rubber
    • B60G2202/143—Plastic spring, e.g. rubber subjected to compression
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/124—Mounting of coil springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/124—Mounting of coil springs
    • B60G2204/1242—Mounting of coil springs on a damper, e.g. MacPerson strut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/128—Damper mount on vehicle body or chassis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/41—Elastic mounts, e.g. bushings
    • B60G2204/4108—Resilient element being enclosed and or pres-tressed in a solid container

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)

Abstract

A mounting is provided for a motor vehicle spring/damper unit, having a central damper 10 with a cylinder 11 and plunger 12, the damper 10 being surrounded by a helical compression spring 16. The mounting 15 includes upper and lower mounting plates 20, 21 secured together with an outwardly directed flange 22 engaging the outer periphery of the upper mounting plate 20. The assembly 20, 21 has fastening means 25 by which it may be secured to the vehicle structure, and a washer 30 is secured to the upper end of the damper plunger 12 so that it is located intermediate of the upper plate 20 and an inwardly directed flange 23 of the lower plate 21 coaxially thereof. Annular elastomeric rings 31, 32 are provided between the washer 30 and the upper and lower mounting plates 20, 21 and a spring pan 40, is mounted coaxially around mounting plate 21, with an annular elastomeric element 42 being disposed between outwardly directed flange formations 22 and 41 and between cylindrical surfaces of the spring pan (40) and the lower mounting plate 21. In alternative embodiments (figures 2, 3) an elastomeric guide bush (65) or metal insert (70) may be provided around the plunger 12, and the mounting may be closed by a cap (75). <IMAGE>

Description

8PRING/DAMPER UNIT MOUNTING The present invention relates to a spring/damper unit mounting for motor vehicles.
Spring/damper units comprising; a central damper having a cylinder the lower end of which is connected to a vehicle wheel support member and a plunger slidably mounted in the cylinder, the upper end of the plunger being secured to the body of the motor vehicle, the damper being surrounded by a helical compression spring which acts between a pair of spring plates, the lower plate being mounted on the cylinder of the damper and the upper plate being mounted with respect to the vehicle body; are conventionally used in motor vehicle suspension systems. In order to isolate noise and wheel vibrations from the motor vehicle body, the plunger and upper spring plate are isolated from the vehicle body by means of elastomeric mounting blocks. Conventionally this is achieved by bolting the mounting plate to the upper end of the damper plunger, with elastomeric bushes on either side of the mounting plate, the mounting plate being adapted to be secured to the vehicle body. A further elastomeric bush is located between the upper spring plate and the mounting plate.
This form of contraction utilises several separate components and it is desirable for assembly purposes to bond the elastomeric bushes to metal components in order to ease assembly of the spring/damper unit.
The present invention provides a spring/damper unit mounting which may be preassembled from independent components without the need to bond the elastomeric components to metal components.
According to one aspect the present invention provides a spring/damper mounting for a motor vehicle, the spring/damper unit having a central damper with a cylinder and plunger, the damper being surrounded by a helical compression spring, said mounting comprising an upper mounting plate and a lower mounting plate, the lower mounting plate defining a cylindrical portion with outwardly directed flange at its upper end and inwardly directed flange at its lower end, the lower mounting plate being secured to the upper mounting plate with its outwardly directed flange engaging the outer periphery of the upper mounting plate, the upper and lower mounting plate assembly being adapted to be secured to the vehicle structure, a washer being adapted to be secured to the upper end of the damper plunger, said washer being located intermediate of the upper mounting plate and inwardly directed flange formation of the lower mounting plate coaxially thereof, annular elastomeric rings being provided between the washer and the upper mounting plate and the washer and the inwardly directed flange of the lower mounting plate and a spring pan having a cylindrical portion and outwardly directed flange formation being mounted coaxially around the cylindrical portion of the lower mounting plate, an annular elastomeric element being disposed between the outwardly directed flange formations and between the opposed cylindrical surfaces of the spring pan and the lower mounting plate.
With the mounting construction of the present invention, the upper and lower mounting plates with the damper washer and elastomeric blocks trapped therebetween may be preassembled without the need to bond the elastomeric blocks to the mounting plates or to the washer.
Furthermore, the spring pan may be preassembled and is retained in position by compression of the portion of the annular elastomeric element located between the cylindrical portions of the spring pan and lower mounting plate.
The elastomeric elements on either side of the damper washer react loads on the damper both in compression and rebound, directly to the vehicle body through the upper and lower mounting plates. Spring loads are reacted directly to the vehicle body through the annular elastomeric element and the mounting plates.
According to a preferred embodiment of the invention, a spring aid cup is secured coaxially to the inwardly directed flange formation of the lower mounting plate.
The spring aid cup locates an elastomeric spring aid element coaxially of the plunger, so that when the damper has been depressed to a predetermined degree, the elastomeric spring aid element will engage the upper end of the cylinder, so that upon further depression of the damper, compression of the spring aid will assist the spring. The load applied to the elastomeric spring aid element is reacted directly to the vehicle body via the spring aid cup and the lower mounting plate.
The invention is now described, by way of example only, with reference to the accompanying drawings in which: Figure 1 illustrates in part section, a spring/damper unit with mounting in accordance with the present invention; and Figures 2 and 3 illustrate various modifications to the mounting illustrated in Figure 1.
As illustrated in Figure 1, a spring/damper unit for a motor vehicle comprises a damper 10 having a cylinder 11 the lower end of the cylinder 11 being adapted, in known manner (not shown), to be connected to a vehicle wheel sllpport member. A plunger is slidably located in the cylinder 11 which is filled with hydraulic fluid to damp movement of the plunger. The plunger comprises a piston assembly (not shown) which slidably engages the cylinder 11 and a rod 12 which extends from the upper end of the cylinder 11. The rod 12 is secured to the vehicle body (not shown) by means of a mounting assembly 15.
The mounting assembly 15 comprises an upper mounting plate 20 and a lower mounting plate 21. The lower mounting plate 21 is of cylindrical configuration with an outwardly directed flange 22 at its upper end and an inwardly directed flange 23 at its lower end. The upper and lower mounting plates 20,21 are secured together coaxially of one another, the upper flange 22 of the lower mounting plate 21 engaging the outer periphery of the upper mounting plate 20. Three studs 25 are provided on the abuting portions of the upper and lower mounting plates 20, 21, by which the mounting assembly 15 may be secured to the vehicle body. The studs 25 may be arranged non-symetrically of the mounting plates 20, 21, so as to ensure specific orientation of the spring/damper unit 10, 16 with respect to the vehicle.
A washer 30 is located between the upper and lower mounting plates 20, 21 by means of a pair of microcellular polyurethane rings 31, 32, one ring 31 located between the washer 30 and the upper mounting plate 20 and the other ring 32 being located between the washer 30 and the lower flange 23 of the lower mounting plate 21. Annular formations 33, 34 are provided on the upper mounting plate 20 and flange 23 respectively, and the washer 30 has recesses 35, 36 about its outer periphery, for location of the rings 31, 32.
The washer 30 is adapted to be secured to the end of the rod 12 by means of a nut 37 which engages a corresponding thread on the rod 12, the washer 30 being located axially against a shoulder 38 on the rod 12.
An upper spring pan 40, of cylindrical configuration and having an outwardly directed flange 41 at its upper end, is located coaxially about the cylindrical portion of the lower mounting plate 21. An annular elastomeric element 42 is interposed between the flanges 22 and 41 and the cylindrical surfaces of the lower mounting plate 21 and spring pan 40. The outer surface of the cylindrical portion and the lower surface of the flange 41 of the spring pan 40 are provided with a rubber facing 44.
A spring aid cup 50 is secured to the lower face of flange 23 of the lower mounting plate 21. An elastomeric spring aid 51 is located in the cup 50 and extends downwardly, coaxially of the rod 12, towards the upper end 52 of cylinder 11. The mounting assembly 15 is preassembled, the damper washer 30 and rings 31, 32 being trapped between the upper and lower mounting plates 20, 21. The spring pan 40 is retained in position by compression of the elastomeric element 42 between the cylindrical surfaces of the spring pan 40 and the lower mounting plate 21; and the spring aid 51 is located in position by the cup 50.
The mounting assembly 15 may then be secured to the spring/damper unit, the spring 16 engaging a spring seat 17 which is secured to the cylinder 11 of the damper 10, at its lower end and the spring pan 40 at its upper end.
The washer 30 may then be secured to the rod 15 by means of nut 37, to secure the spring/damper unit 10, 16 to the mounting assembly 15. The spring/damper unit 10, 16 and mounting assembly 15 may then be attached to the vehicle body, by means of the studs 25.
In operation, the rings 31, 32 isolate the damper 10 from the vehicle hody, reacting both bump and rehound forces directly to the vehicle body through mounting plates 20 and 21. The elastomeric element 42 isolates the spring loads from the vehicle body, these loads again being reacted directly with the vehicle body. The elastomeric element 42 also provides lateral location of the upper end of spring 16. The spring aid 51, after the damper has been depressed to a predetermined degree, will engage the upper end 52 of cylinder 11, so that upon further depression of the damper 10, the spring aid 51 will be compressed and will assist the spring 16. Again the force created by compression of the spring aid 51 is reacted directly against the vehicle body via the lower mounting plate 21.
In accordance with the present invention the forces applied by the damper 10, spring 16 and spring aid 51 are all reacted against the vehicle body independently. The compliance of the elastomeric elements which isolate the damper and spring from the vehicle body may consequently be selected for their particular purposes. For example, the spring isolation will generally be required to be stiffer than damper isolation, the annular element 42 and rings 31, 32 may consequently be designed accordingly.
Various modifications may be made to the above described embodiment, without departing from the invention. For example, instead of using microcellular polyurethane for the rings 31 and 32, other elastomeric materials may be used. These materials will however normally be required to be relatively soft. Buffering rings 60, 61 of a harder elastomeric material may be provided, as illustrated in Figure 2, so that they will be engaged by the washer 30 when high damping loads are applied. The rings 60, 61 will thereby modify the compliance of the rings 31, 32 at high damping loads.
Also as illustrated in Figure 2, an elastomeric guide bush 65 may be located with respect to the lower mounting plate 21, so that it engages the rod 12 and reacts damper side loads and locates the rod 12 centrally. The surface of the guide bush 65 is preferably lubricated or coated with a low friction material.
As illustrated in Figure 3, a metal insert 70 may be located against the lower mounting plate 21 or spring aid cup 50, to limit vertical travel of the spring/damper unit in case of failure of the spring aid 51.
Alternatively, the spring aid cup 50 and the upper end 52 of the cylinder 11 may be arranged to make contact when the limit of travel is reached.
Also as illustrated in Figure 3, a cap formation 75 may be provided to close the upper end of the mounting assembly 15, once the mounting assembly 15 has been attached to the spring/damper unit. This cap formation 75 may be retained on the studs 25 against the body of the vehicle or may be secured to the upper mounting plate 20 in suitable manner.

Claims (9)

1. A spring/damper mounting for a motor vehicle the spring/damper unit having a central damper with a cylinder and plunger, the damper being surrounded by a helical compression spring, said mounting comprising an upper mounting plate and a lower mounting plate, the lower mounting plate defining a cylindrical portion with outwardly directed flange at its upper end and inwardly directed flange at its lower end, the lower mounting plate being secured to the upper mounting plate with its outwardly directed flange engaging the outer periphery of the upper mounting plate, the upper and lower mounting plate assembly being adapted to be secured to the vehicle structure, a washer being adapted to be secured to the upper end of the damper plunger, said washer being located intermediate of the upper mounting plate and inwardly directed flange formation of the lower mounting plate coaxially thereof, annular elastomeric rings being provided between the washer and the upper mounting plate and the washer and the inwardly directed flange of the lower mounting plate and a spring pan having a cylindrical portion and outwardly directed flange formation being mounted coaxially around the cylindrical portion of the lower mounting plate, an annular elastomeric element being disposed between the outwardly directed flange formations and between the opposed cylindrical surfaces of the spring pan and the lower mounting plate.
2. A spring/damper mounting according to Claim 1 in which formations are provided on the upper and lower mounting plates and/or on the damper washer, for location of the elastomeric rings.
3. A sprng/dmper mounting according to Claim 1 or 2 in which the a7stomeric rings are mafle of microcellular polyurethane.
4. A spring/damper unit according to any one of the preceding claims in which the upper and lower mounting plates, damper washer, elastomeric rings, elastomeric element and spring pan are preassembled, the upper and lower mounting plates being secured together about their outer peripheries to trap the damper washer and elastomeric rings therebetween and the spring pan being located on the cylindrical portion of the lower mounting plate by compression of the elastomeric element therebetween.
5. A spring/damper mounting according to any one of the preceding claims in which a spring aid cup is secured to the lower face of the inwardly directed flange formation of the lower mounting plate, the spring aid cup retaining an elastomeric spring aid element which is adapted after a predetermined depression of the damper to engage the upper end of the damper cylinder, so that upon further depression of the damper, the spring aid element will be compressed to produce a force which will assist the spring.
6. A spring/damper mounting according to any one of the preceding claims in which the lower face of the flange and outer face of the cylindrical portion of the spring pan are faced with an elastomeric material.
7. A spring/damper mounting according to any one of the preceding claims in which a lower spring mounting is secured to the damper cylinder.
8. A spring/damper mounting according to any one of the preceding claims in which elastomeric buffer rings are provided between the damper washer and the upper and lower mounting plates, the elastomeric buffer rings being engaged by the damper washer to assist the elastomeric rings when subject to high damping loads.
9. A spring/damper mounting substantially as described herein with reference to and as shown in Figures 1 to 3 of the accopmpanying drawings.
GB9408528A 1994-04-29 1994-04-29 Spring/damper unit mounting Expired - Fee Related GB2289109B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9408528A GB2289109B (en) 1994-04-29 1994-04-29 Spring/damper unit mounting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9408528A GB2289109B (en) 1994-04-29 1994-04-29 Spring/damper unit mounting

Publications (3)

Publication Number Publication Date
GB9408528D0 GB9408528D0 (en) 1994-06-22
GB2289109A true GB2289109A (en) 1995-11-08
GB2289109B GB2289109B (en) 1997-11-19

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Family Applications (1)

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GB9408528A Expired - Fee Related GB2289109B (en) 1994-04-29 1994-04-29 Spring/damper unit mounting

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19755313A1 (en) * 1997-12-12 1999-06-17 Audi Ag Vibration-damping mounting, attaching e.g. shock absorber to vehicle body and capable of selective noise reduction
WO2000000359A1 (en) * 1998-06-26 2000-01-06 Compagnie Generale Des Etablissements Michelin - Michelin Upper coupling attachment for macpherson strut
FR2829818A1 (en) * 2001-09-19 2003-03-21 C F Gomma Barre Thomas Vehicle suspension unit support has disc sandwiched between elastic rings of cellular thermoplastic material
WO2004063583A1 (en) * 2003-01-16 2004-07-29 Basf Aktiengesellschaft Damper bearings
WO2004076209A1 (en) * 2003-02-28 2004-09-10 Basf Aktiengesellschaft Suspension construction
EP1681180A1 (en) * 2005-01-12 2006-07-19 TOYO TIRE &amp; RUBBER CO., LTD . Strut mount

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA860993A (en) * 1971-01-12 M. Smith Addison Production of high density flexible urethane foams by a one-shot process
GB2050557A (en) * 1979-04-18 1981-01-07 Nissan Motor Resilient mounting of vehicle suspension struts
US4486028A (en) * 1982-12-22 1984-12-04 Toyota Jidosha Kabushiki Kaisha Upper support structure for front wheel suspension of automobile
EP0136023A2 (en) * 1983-09-01 1985-04-03 General Motors Corporation Steerable vehicle suspension strut assembly
US5133573A (en) * 1989-03-27 1992-07-28 Mazda Motor Corporation Strut mounting structure for a vehicle and method of assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA860993A (en) * 1971-01-12 M. Smith Addison Production of high density flexible urethane foams by a one-shot process
GB2050557A (en) * 1979-04-18 1981-01-07 Nissan Motor Resilient mounting of vehicle suspension struts
US4486028A (en) * 1982-12-22 1984-12-04 Toyota Jidosha Kabushiki Kaisha Upper support structure for front wheel suspension of automobile
EP0136023A2 (en) * 1983-09-01 1985-04-03 General Motors Corporation Steerable vehicle suspension strut assembly
US5133573A (en) * 1989-03-27 1992-07-28 Mazda Motor Corporation Strut mounting structure for a vehicle and method of assembly

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19755313A1 (en) * 1997-12-12 1999-06-17 Audi Ag Vibration-damping mounting, attaching e.g. shock absorber to vehicle body and capable of selective noise reduction
WO2000000359A1 (en) * 1998-06-26 2000-01-06 Compagnie Generale Des Etablissements Michelin - Michelin Upper coupling attachment for macpherson strut
US6412798B2 (en) 1998-06-26 2002-07-02 Compagnie Generale Des Etablissements Michelin-Michelin & Cie Upper coupling attachment for MacPherson strut
FR2829818A1 (en) * 2001-09-19 2003-03-21 C F Gomma Barre Thomas Vehicle suspension unit support has disc sandwiched between elastic rings of cellular thermoplastic material
WO2004063583A1 (en) * 2003-01-16 2004-07-29 Basf Aktiengesellschaft Damper bearings
WO2004076209A1 (en) * 2003-02-28 2004-09-10 Basf Aktiengesellschaft Suspension construction
EP1681180A1 (en) * 2005-01-12 2006-07-19 TOYO TIRE &amp; RUBBER CO., LTD . Strut mount
US7350779B2 (en) 2005-01-12 2008-04-01 Toyo Tire & Rubber Co., Ltd. Strut mount

Also Published As

Publication number Publication date
GB2289109B (en) 1997-11-19
GB9408528D0 (en) 1994-06-22

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020429