WO2002046027A1 - Two stage body mount rebound cushion - Google Patents
Two stage body mount rebound cushion Download PDFInfo
- Publication number
- WO2002046027A1 WO2002046027A1 PCT/US2001/045403 US0145403W WO0246027A1 WO 2002046027 A1 WO2002046027 A1 WO 2002046027A1 US 0145403 W US0145403 W US 0145403W WO 0246027 A1 WO0246027 A1 WO 0246027A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cushion
- rebound
- assembly
- body mount
- cushion portion
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D24/00—Connections between vehicle body and vehicle frame
- B62D24/02—Vehicle body, not intended to move relatively to the vehicle frame, and mounted on vibration absorbing mountings, e.g. rubber pads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G99/00—Subject matter not provided for in other groups of this subclass
- B60G99/004—Other suspension arrangements with rubber springs
-
- 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
- F16F1/373—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by having a particular shape
- F16F1/3732—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by having a particular shape having an annular or the like shape, e.g. grommet-type resilient mountings
-
- 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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
-
- 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
- F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
- F16F3/08—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber
- F16F3/087—Units comprising several springs made of plastics or the like material
-
- 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
- B60G2204/16—Mounting of vehicle body on 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
Definitions
- This invention is directed to a vehicle body mount disposed between a vehicle body and frame to cushion or damp vibration characteristics transferred between the body and frame. More particularly, the invention is directed to an improved two stage rebound cushion used in a body mount.
- Vehicles are typically equipped with a body mount that serves to isolate the transmission of vibration energy and impact energy from the vehicle and suspension and frame through the vehicle body.
- the body mount is positioned between the vehicle body and frame and provides vibration damping characteristics or cushioning.
- a rebound cushion is typically used in conjunction with the body mount to provide additional cushioning or vibration damping.
- Rebound cushions normally employ an elastomeric member that is received within a support structure that secures the rebound cushion to the body mount.
- the elastomeric member is formed from plastic, rubber, or composite materials that exhibit energy absorption or vibration damping characteristics.
- a simplified rebound cushion includes an annular elastomeric member engaged or retained at one end by a stamped metal plate and a fastener that extends centrally through the plate and elastomeric member. That is, the body mount is disposed between the vehicle body and the frame, while the rebound cushion is located on an opposite face of the frame.
- the rebound cushion of a body mount assembly has conflicting requirements.
- the rebound cushion In order to provide adequate isolation, the rebound cushion must be vertically “soft” so as not to add excessive cushioning rate in that direction. Still another requirement is for the rebound cushion to provide progressive rate buildup and thereby prevent excessive travel during rebound.
- the rebound cushion also must remain in contact with the vehicle frame through the entire dampening stroke to prevent "slapping" or "popping” that may be exhibited on vehicle rebound.
- a rebound cushion for a body mount that provides a low cushioning rate for improved isolation and a second portion that provides rebound travel control and prevents any slapping or popping associated with the assembly.
- the exemplary embodiment preferably has a first portion in constant compression.
- An exemplary embodiment of the two stage rebound cushion has two independent rings.
- a first or inner ring is elongated and provides for a low vertical system cushioning ring since it is in constant compression even at extended travels.
- a second or outer ring provides desired rebound travel control upon contact engagement with the vehicle frame.
- first and second ring portions are interconnected by a thin membrane or web that permits independent motion of the first and second ring portions and yet allows the first and second components to be formed as a single piece assembly.
- FIGURE 1 is a cross-sectional view of an exemplary vehicle frame design incorporating a body mount using the rebound cushion assembly of the present invention.
- FIGURE 2 is a cross-sectional view of a second preferred embodiment illustrating the inventive rebound cushion used in conjunction with a different upper cushion assembly.
- FIGURE 3 is a cross-sectional view of the rebound cushion assembly.
- FIGURE 4 is an exploded, perspective view of the individual components of the rebound cushion assembly.
- FIGURE 5 is a perspective view of the cushion assembly of FIGURE 3.
- FIGURE 1 illustrates a body mount assembly 20 interposed in a frame system 22 that includes a vehicle body 24 mounted to a vehicle frame 26. Extending from the frame is a pedestal bracket 28 that includes an opening or aperture 30 for receiving a portion of the body mount therethrough. More particularly, individual components forming the body mount are secured in place via a fastener such as retaining bolt 32.
- a fastener such as retaining bolt 32.
- This is a conventional fastening arrangement in which the retaining bolt extends through a central opening provided in the body mount assembly, through the opening 30 in the vehicle frame, and threadedly engages the vehicle body 24.
- alternative fastening arrangements may be used without departing from the scope and intend of the present invention.
- the body mount assembly 20 includes a first or upper member 40 and a second or lower member 42, also referred to as a rebound cushion assembly.
- the first and second members are disposed on opposite surfaces of the pedestal bracket 28 and provide cushioning and vibration dampening characteristics as is generally known in the art.
- the first member 40 includes a cap or helmet 44 that partially encloses an elastomeric member 46.
- the helmet is typically formed of a stamped metal and includes a stem portion 48 defining an opening that receives the fastener 32 therethrough.
- Side wall 50 may be continuous or discontinuous about the circumference of the elastomeric member.
- the elastomeric member 36 may include a metal collar 52 that is substantially enclosed by the -elastomeric member.
- the first member 40 may adopt different configurations as desired in providing the desired cushioning and vibration damping characteristics of the body mount assembly.
- FIGURE 2 Another embodiment of the first member is illustrated in FIGURE 2 where like elements are identified by like reference numerals with a primed suffix (') and new elements are identified by new numerals. Selected components -such as the frame a d-fastener are remoyed for ease of illustration.
- the primary difference relates to the configuration of the elastomeric member 46', which is an assembly of two distinct components 46a and 46b.
- One of the elastomeric components here the radially outer elastomeric component 46b, includes metal collar 52'. More particular details of the structure and function of the upper body mounts of FIGURES 1 and 2 can be found in U.S. Patent No. 6,030,016 and pending application Serial No. 09/256,445, filed February 23, 1999 (CSA 2 0083).
- the rebound cushion assembly includes two discrete components, namely a clamp member 60 and an elastomeric member 62.
- the clamp member is preferably a stamped metal component having a central opening 64 that receives a portion of the fastener 32 therethrough, specifically a shank portion of the retaining bolt.
- the opening is preferably provided in a raised central boss 66 that tapers about its perimeter to form a first circumferential groove 68 (FIGURE 3) and, spreads radially outward therefrom into a second circumferential groove 70 (preferably concentric with the first groove).
- An upturned edge 72 extends about the perimeter of the clamp member and, in conjunction with the fastener, retains the elastomeric rebound cushion assembly radially contained within the clamp member.
- the elastomeric member 62 of the rebound cushion assembly satisfies a number of conflicting requirements. Specifically, it is vertically "soft" so as not to add excessive cushioning rate. Stated another way, the vertical cushioning rate absorbs sufficient energy to provide adequate isolation and a smoother ride.
- the rebound cushion assembly also provides progressive rate build-up to prevent excessive vertical travels during rebound. Moreover, the rebound cushion assembly remains in contact with the vehicle frame through the entire dampening stroke to prevent slapping or popping on vehicle rebound. Slapping or popping occurs when the upper cushion is able to lift off of the vehicle frame and causes an audible slapping or popping noise once it engages the vehicle frame.
- a first portion or inner ring 80 has an extended, long, thin profile that provides a low compression rate for improved isolation. It permits constant compression of the rebound cushion even at extended travel length because the inner ring has an elongated dimension. It is shown in this embodiment as having a first or upper end 82 that is generally planar and adapted to engage the vehicle frame, namely one of the surfaces of the pedestal bracket of the frame. A second end 84 of the inner ring is dimensioned for receipt in the first or inner groove 68 of the clamp member.
- Alternating notches 86 and support ridges 88 are preferably provided about the circumference of the second end of the elastomeric member first portion. For example, three notches are evident in FIGURE 3, while a series of notches and ridges are more apparent in FIGURE 4.
- the notches and ridges allow the first portion or inner cushion to be substantially compressed during a rebound stroke of the rebound cushion assembly and body mount.
- the notches and ridges in conjunction with the pre-selected durometer of the elastomeric material comprising the inner cushion, produce a desired vertical cushion rate. It will be appreciated, however, that the alternating notches and recesses are not always required and offer additional features that may be useful in selected designs.
- the elastomeric member 46 or upper cushion can be designed to provide a greater load carrying ability while the lower cushion assembly maintains a low vertical system rate.
- a second, independent ring 90 is preferably concentrically received about the inner ring. It has a substantially reduced length or height relative to the inner ring, on the order of one-half its height in an uncompressed state.
- First or upper end 92 is adapted for selective engagement with the vehicle frame, but in a normal, unloaded condition, the surface 92 is spaced from the vehicle frame.
- the second ring comes into contact with the vehicle frame during rebound travel control. It thus provides progressive rate buildup to prevent excessive rate of travel during rebound. In this manner, the upper cushion is unable to lift off the vehicle frame and any slapping or popping noise caused by the upper cushion hitting the vehicle frame is avoided.
- a second end 94 of the outer ring is received in and radially constrained by the outer groove 70.
- the inner ring 80 incorporated alternating notches and recesses for selected designs, it will be appreciated that the second ring 90 may also adopt an alternating notch and recess configuration to provide a progressive rate build up when the rebound cushion is placed under compression.
- the exemplary embodiment of the rebound cushion and body mount design provides an assembly that has minimal impact on the system rate and the loaded height. Moreover, it is always in compression regardless of the amount of travel, and further has the advantageous, significant rebound travel control through a progressive rate buildup by using two independent rings, where the rings address separate functions.
- the rings are preferably connected by a thin membrane 96 that has a reverse curved conformation allowing independent movement of the rings relative to one another.
- interconnecting the rings by use of the thin membrane 96 permits molding an assembly of the components as a single piece.
- first and second rings are molded as a single piece, it will be appreciated that these portions or rings may have different durometer levels to address the individual features that the independent rings are to satisfy. Likewise, location of the inner and outer rings relative to one another is facilitated through use of the thin membrane 96. In addition, the_.grooves 68, 70 of the clamp member receive and support the second ends of the inner and outer rings, respectively, to maintain the independent action and function of the rings.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Vibration Prevention Devices (AREA)
- Vehicle Body Suspensions (AREA)
- Springs (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2003-7007473A KR20040078042A (en) | 2000-12-04 | 2001-12-04 | Two stage body mount rebound cushion |
EP01995302A EP1345806A4 (en) | 2000-12-04 | 2001-12-04 | Two stage body mount rebound cushion |
MXPA03004977A MXPA03004977A (en) | 2000-12-04 | 2001-12-04 | Two stage body mount rebound cushion. |
CA002436255A CA2436255A1 (en) | 2000-12-04 | 2001-12-04 | Two stage body mount rebound cushion |
JP2002547782A JP2004520992A (en) | 2000-12-04 | 2001-12-04 | Two-stage rebound cushion for body mounting |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/729,548 US6502883B2 (en) | 2000-12-04 | 2000-12-04 | Two stage body mount rebound cushion |
US09/729,548 | 2000-12-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002046027A1 true WO2002046027A1 (en) | 2002-06-13 |
WO2002046027A8 WO2002046027A8 (en) | 2003-01-09 |
Family
ID=24931538
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/045403 WO2002046027A1 (en) | 2000-12-04 | 2001-12-04 | Two stage body mount rebound cushion |
Country Status (7)
Country | Link |
---|---|
US (2) | US6502883B2 (en) |
EP (1) | EP1345806A4 (en) |
JP (1) | JP2004520992A (en) |
KR (1) | KR20040078042A (en) |
CA (1) | CA2436255A1 (en) |
MX (1) | MXPA03004977A (en) |
WO (1) | WO2002046027A1 (en) |
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JP2005082095A (en) * | 2003-09-10 | 2005-03-31 | Mitsubishi Motors Corp | Body mount device |
FR2959290A1 (en) * | 2010-04-21 | 2011-10-28 | Mbda France | Device for dampening vibrations and shocks between structure of i.e. aircraft and i.e. sensitive material, has shock absorber and shock-proof abutment forming shock absorber that are concentrically arranged with respect to each other |
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-
2000
- 2000-12-04 US US09/729,548 patent/US6502883B2/en not_active Expired - Fee Related
-
2001
- 2001-12-04 CA CA002436255A patent/CA2436255A1/en not_active Abandoned
- 2001-12-04 EP EP01995302A patent/EP1345806A4/en not_active Withdrawn
- 2001-12-04 JP JP2002547782A patent/JP2004520992A/en active Pending
- 2001-12-04 MX MXPA03004977A patent/MXPA03004977A/en unknown
- 2001-12-04 KR KR10-2003-7007473A patent/KR20040078042A/en not_active Application Discontinuation
- 2001-12-04 WO PCT/US2001/045403 patent/WO2002046027A1/en not_active Application Discontinuation
-
2002
- 2002-11-01 US US10/286,529 patent/US6588820B2/en not_active Expired - Fee Related
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005082095A (en) * | 2003-09-10 | 2005-03-31 | Mitsubishi Motors Corp | Body mount device |
FR2959290A1 (en) * | 2010-04-21 | 2011-10-28 | Mbda France | Device for dampening vibrations and shocks between structure of i.e. aircraft and i.e. sensitive material, has shock absorber and shock-proof abutment forming shock absorber that are concentrically arranged with respect to each other |
Also Published As
Publication number | Publication date |
---|---|
CA2436255A1 (en) | 2002-06-13 |
KR20040078042A (en) | 2004-09-08 |
EP1345806A1 (en) | 2003-09-24 |
US20030057723A1 (en) | 2003-03-27 |
WO2002046027A8 (en) | 2003-01-09 |
US6502883B2 (en) | 2003-01-07 |
JP2004520992A (en) | 2004-07-15 |
US6588820B2 (en) | 2003-07-08 |
MXPA03004977A (en) | 2004-09-10 |
EP1345806A4 (en) | 2005-09-14 |
US20020121793A1 (en) | 2002-09-05 |
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