EP3710718A1 - Cup for a strut of a damping device - Google Patents
Cup for a strut of a damping deviceInfo
- Publication number
- EP3710718A1 EP3710718A1 EP18807569.1A EP18807569A EP3710718A1 EP 3710718 A1 EP3710718 A1 EP 3710718A1 EP 18807569 A EP18807569 A EP 18807569A EP 3710718 A1 EP3710718 A1 EP 3710718A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cup
- main body
- reinforcing elements
- damping device
- barrier
- 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.)
- Pending
Links
- 238000013016 damping Methods 0.000 title claims description 24
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 37
- 230000004888 barrier function Effects 0.000 claims abstract description 18
- 230000002093 peripheral effect Effects 0.000 claims abstract description 15
- 230000000703 anti-shock Effects 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 5
- 239000006096 absorbing agent Substances 0.000 abstract 1
- 230000035939 shock Effects 0.000 description 11
- 239000002184 metal Substances 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/04—Wound springs
- F16F1/12—Attachments or mountings
-
- 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
-
- 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
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
- F16F7/121—Vibration-dampers; Shock-absorbers using plastic deformation of members the members having a cellular, e.g. honeycomb, structure
- F16F7/122—Vibration-dampers; Shock-absorbers using plastic deformation of members the members having a cellular, e.g. honeycomb, structure characterised by corrugations, e.g. of rolled corrugated 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
- B60G2204/12—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
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/014—Constructional features of suspension elements, e.g. arms, dampers, springs with reinforcing nerves or branches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/016—Constructional features of suspension elements, e.g. arms, dampers, springs allowing controlled deformation during collision
Definitions
- the invention relates to a damping device that can be installed in a motor vehicle. More particularly, the invention relates to a cup placed on a strut of the damping device. This cup serves to support a spring surrounding the strut. It is otherwise called spring cup.
- the spring cups are made of metal.
- the fact of replacing the metal cups with cups made from a plastic material makes it possible to reduce the weight of the damping device, which contributes to the lightening of the vehicle.
- plastic cups are cheaper in terms of manufacturing cost than metal cups.
- Figure 1 shows a cup 200 according to the prior art mounted on a damping device 100.
- the damping device 100 undergoes an accidental drop generating a shock that may occur during handling operations.
- the cup 200 is in contact first with the ground. Since the cup 200 is made of plastic, it deteriorates or even breaks.
- a plastic part tends to dissipate less well the kinetic energy of a shock than metal piece.
- the mechanical strength of the plastic part may decrease after the impact.
- the cup 200 may become detached from the strut.
- the suspension spring is no longer retained. This spring is likely to leap and can hurt operators nearby.
- an object of the invention is to provide a resilient plastic spring cup.
- Another object of the invention is to provide a compact plastic spring cup.
- the invention relates to a spring cup intended to be installed on a strut of a damper device, said cup comprising a main body.
- the cup comprises a deformable anti-shock structure composed of a barrier disposed around and at a distance from a peripheral edge of the main body, and reinforcing elements connecting said barrier to the main body, spaced from each other and distributed circumferentially on the peripheral edge of the main body.
- the impact takes place first of all with the anti-shock structure of the cup which surrounds the main body of the cup.
- the energy of the shock is thus dissipated at least partially by the barrier and the reinforcing elements.
- the anti-shock structure the cup has a better impact resistance.
- the anti-shock structure is marked by a visible deformation, which makes it possible to identify the parts that have been impacted and that must be replaced.
- the anti-shock structure has the shape of a ring connected to the main body via the reinforcing elements.
- Such a structure can be installed around a cup without greatly increasing the dimensions thereof. In this way, one can have a strong plastic cup and which may be suitable for a damping device requiring a small cup.
- the reinforcing elements are inclined relative to a radius connecting a center of the main body to the peripheral edge of said body.
- the reinforcing elements thus inclined can better dissipate the energy of the shock.
- the inclination and dimensions of the reinforcing elements determine the dissipation efficiency of the impact energy of the cup.
- the reinforcing elements are all inclined in the same direction.
- the reinforcing elements are inclined differently from each other.
- the reinforcing elements inclined at a first angle and the reinforcing elements inclined at a second angle, opposite the first angle are alternately arranged around the peripheral edge of the main body.
- the absolute value of the angle measured between each reinforcing element and the radius (R) is between 0 ° and 80 °.
- this value is 45 °.
- an elastomeric body is placed between two adjacent reinforcing elements.
- the elastomeric body may be made of rubber.
- the elastomeric bodies are known for their shock-absorbing property or their shock energy absorption capacity. In this way, the elastomeric body with the barrier and the reinforcing elements together reduce considerably, or even cancel, the impact energy that can reach the main body of the cup. Note that the addition of an elastomeric body is optional.
- the deformable anti-shock structure is integral with the main body.
- the deformable anti-shock structure is made of a material different from that of the main body.
- a different material less sensitive to shock than that of the main body.
- it can be made of metal.
- the invention also relates to a damping device for a motor vehicle comprising a cup according to the invention made according to one of the features presented above.
- the invention also relates to a motor vehicle comprising such a damping device.
- FIG. 1 shows, schematically, a sectional view of a damping device comprising a spring cup of the prior art
- FIG. 2 schematically represents a sectional view of a damping device comprising a spring cup made according to an exemplary embodiment of the invention
- FIG. 3 represents a bottom perspective view of a cup according to an exemplary embodiment of the invention.
- FIG. 4 shows a view of the bottom of the cup of Figure 3;
- FIG. 5 represents a detail view along a plane V represented in FIG. 4;
- FIG. 8 represents a view from above of the cup of FIG. 3 and FIG.
- FIG. 2 illustrates an upper portion of an assembled damping device 1, ready to be installed in a motor vehicle.
- the damping device 1 comprises a strut 11 surrounded by a suspension spring 12.
- An upper cup, or spring plate 2 is placed on the suspension spring 12.
- the spring cup 2 serves as a point of suspension. upper support for the suspension spring 12.
- the spring cup 2 further comprises a main body 20 surrounded by a deformable anti-shock structure 3.
- the spring cup 2 and the suspension spring 12 will be called below in short the cup 2 and the spring 12.
- the main body 20 of the cup 2 has a solid disc shape having an opening 22 in the middle passing a piston 13 of the strut.
- the main body 20 is the mechanically working part of the cup 2 because it is the interface between the damping device 1 and a floor of the vehicle. It is also the support platform for spring 12. It is therefore important to preserve the integrity of the main body. to ensure proper operation of the damping device 1.
- the deformable anti-shock structure 3 which consists of a barrier 31 disposed around and at a distance from a peripheral edge 21 of the main body 20.
- the barrier 31 is in the form of ring that envelops the main body 20.
- the reinforcing elements 32 are bars 320 extending radially from the peripheral edge 21 to the barrier 32 and thus connecting these two elements.
- FIG. 4 and FIG. 5 it is seen that the reinforcing elements 32 are inclined with respect to a radius R connecting a center 0 of the main body 20 to the peripheral edge 21.
- the reinforcement elements 32 according to the inclination of the reinforcement elements 32, these are divided into two groups.
- the first group comprises reinforcing elements 321 inclined to the left while the second group comprises reinforcement elements inclined to the right.
- the term "left" is the left of Figures 4 and 5 as shown and "right" the right of the same figures.
- Each reinforcing element 321 of the first group is inclined at a first angle ⁇ relative to the radius R.
- Each reinforcing element 322 of the second group is inclined by a second angle ⁇ with respect to the radius R.
- the first angle has a negative sign and the second angle ⁇ a positive sign.
- the first and second angles a and ⁇ have the same value, here of 45 °, but of opposite signs.
- the reinforcing elements are inclined at opposite angles.
- the reinforcing elements of the first group and the second group 321 and 322 are arranged alternately around the peripheral edge 21: a reinforcing element of the first group 321 is placed between two reinforcing elements of the second group 322. This reason is repeated on the circumference of the main body.
- Figures 6 and 7 respectively show the deformable anti-shock structure 3 before and after an impact with an object 6 which hits the cup 2.
- This example illustrates the behavior of the anti-shock structure 3 and its effect on the main body 20 in case of shock.
- the barrier and the reinforcing elements may be deformed due to the fact that the reinforcing elements are separated by a through space.
- Figure 8 shows a bottom view of the cup. This conventionally comprises central stiffening ribs separated by non-through spaces and, peripherally, the deformable shockproof structure forming the subject of the invention, wherein the reinforcing elements 32, 321, 322 are separated by spaces. through.
- the object 6 comes into contact with the cup 2 in a direction Fi, parallel to the radius R.
- the object 6 first touches the barrier 31 which is depressed locally at the point of collision with the object 6.
- the barrier members 31, the reinforcing elements 32 supporting the barrier 31, in particular at the collision site deform by squeezing.
- the mechanical force Fi is thus partially or totally transformed into deformation of the barrier 31 and the reinforcing elements 32.
- the impact force Fi is greatly reduced or completely eliminated.
- the energy of the shock is dissipated partially or completely by the anti-shock structure 3.
- the main body 20 is thus protected from collision with the object 6.
- the anti-shock structure has the function of not only protection but also information to signal the parts at risk, and thus increase the safety of use of the damping device.
- the anti-shock structure is not intended to be in contact, directly or indirectly with the damping spring and thus, it is not intended to support the axial load exerted on the strut. Its main and unique function is to dissipate the impact force in case of collision of the cup with another object in the radial direction and in case of fall of the cup, before mounting in a vehicle for example.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Dampers (AREA)
- Vehicle Body Suspensions (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1760651A FR3073592B1 (en) | 2017-11-13 | 2017-11-13 | CUP FOR LEG FORCE OF A CUSHIONING DEVICE |
PCT/EP2018/080996 WO2019092260A1 (en) | 2017-11-13 | 2018-11-13 | Cup for a strut of a damping device |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3710718A1 true EP3710718A1 (en) | 2020-09-23 |
Family
ID=61027924
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18807569.1A Pending EP3710718A1 (en) | 2017-11-13 | 2018-11-13 | Cup for a strut of a damping device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3710718A1 (en) |
FR (1) | FR3073592B1 (en) |
WO (1) | WO2019092260A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5233370B2 (en) * | 2008-04-02 | 2013-07-10 | オイレス工業株式会社 | Thrust sliding bearing |
US8109492B2 (en) * | 2008-06-23 | 2012-02-07 | GM Global Technology Operations LLC | Lightweight, polymeric automotive strut suspension upper mounting |
US20100230877A1 (en) * | 2009-03-13 | 2010-09-16 | Gm Global Technology Operations, Inc. | Vehicular impact bumper assembly |
JP5948233B2 (en) * | 2012-12-10 | 2016-07-06 | 住友理工株式会社 | Upper member for suspension |
US9802454B2 (en) * | 2014-07-28 | 2017-10-31 | Tenneco Automotive Operating Company Inc. | Plastic spring seat having integrated crash member |
FR3026678B1 (en) * | 2014-10-02 | 2020-04-17 | Ntn-Snr Roulements | MULTIPURPOSE MONOBLOCK CUP SUSPENSION STOP |
DE102016200307A1 (en) * | 2016-01-13 | 2017-01-12 | Zf Friedrichshafen Ag | Spring plate for a vibration damper |
-
2017
- 2017-11-13 FR FR1760651A patent/FR3073592B1/en active Active
-
2018
- 2018-11-13 WO PCT/EP2018/080996 patent/WO2019092260A1/en unknown
- 2018-11-13 EP EP18807569.1A patent/EP3710718A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
FR3073592A1 (en) | 2019-05-17 |
WO2019092260A1 (en) | 2019-05-16 |
FR3073592B1 (en) | 2020-09-11 |
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Legal Events
Date | Code | Title | Description |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
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17P | Request for examination filed |
Effective date: 20200421 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
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AX | Request for extension of the european patent |
Extension state: BA ME |
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DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: RENAULT S.A.S |
|
RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: RENAULT S.A.S |
|
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230608 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20231215 |