EP3105071A1 - Dispositif a ressorts ayant une raideur commandee - Google Patents
Dispositif a ressorts ayant une raideur commandeeInfo
- Publication number
- EP3105071A1 EP3105071A1 EP15704350.6A EP15704350A EP3105071A1 EP 3105071 A1 EP3105071 A1 EP 3105071A1 EP 15704350 A EP15704350 A EP 15704350A EP 3105071 A1 EP3105071 A1 EP 3105071A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring
- support
- rod
- plate
- stiffness
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/14—Resilient suspensions characterised by arrangement, location or kind of springs having helical, spiral or coil springs only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/14—Resilient suspensions characterised by arrangement, location or kind of springs having helical, spiral or coil springs only
- B60G11/16—Resilient suspensions characterised by arrangement, location or kind of springs having helical, spiral or coil springs only characterised by means specially adapted for attaching the spring to axle or sprung part of the vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/021—Spring characteristics, e.g. mechanical springs and mechanical adjusting means the mechanical spring being a coil spring
-
- 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
- F16F1/121—Attachments or mountings adjustable, e.g. to modify spring characteristics
-
- 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
- F16F1/128—Attachments or mountings with motion-limiting means, e.g. with a full-length guide element or ball joint connections; with protective outer cover
-
- 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
- F16F1/13—Attachments or mountings comprising inserts and spacers between the windings for changing the mechanical or physical characteristics of the spring
-
- 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
- F16F3/02—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of steel or of other material having low internal friction
- F16F3/04—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of steel or of other material having low internal friction composed only of wound springs
-
- 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
- B60G2202/40—Type of actuator
-
- 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
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/20—Spring action or springs
- B60G2500/22—Spring constant
Definitions
- the field of the invention relates to a spring device with variable stiffness for a motor vehicle suspension, in particular comprising two springs of distinct stiffness.
- the suspension carries the load of the motor vehicle and also ensures the vertical comfort of the vehicle by filtering unevenness of the road.
- Conventional mechanical suspensions comprise a device with a spring whose end turns are secured to supports. These suspensions have a linear stiffness and the adjustment is adapted to obtain a compromise of comfort with respect to the holding of the body.
- the suspension of a sports car is configured to promote handling at the expense of comfort, while a family vehicle sees the comfort of the cashier.
- Hydropneumatic suspensions are also known which make it possible to modify both the stiffness and the damping.
- This solution has the disadvantage of being difficult to implant on a vehicle in comparison with a classical mechanical solution. Its cost is also higher.
- Patent document FR2677929B1 describes, in FIG. 8, a shock absorber with two springs whose respective stiffness of each spring is different.
- This device makes it possible to modify the equivalent stiffness of the damper by eliminating the action of the spring R30 having the lowest stiffness. The elimination is operative when the compression of the spring R30 is such that the support 32 of the spring R30 is constrained by a stop 33. The compression of this spring then stops, only the upper stiffness spring R20 supporting the increase of load.
- this system has the disadvantage of the impossibility of controlling the variation of the equivalent stiffness of the spring device. Indeed, it is predetermined by the crushing stroke imposed by the position of the stop 33 on the guide rod disposed within the springs.
- An object of the invention is to provide a spring device whose stiffness can be controlled manually or automatically to accommodate a larger number of life situations.
- the invention relates to a spring-loaded device controlled for a motor vehicle suspension comprising a spring, a first support secured to a first end turn of the spring, a second support secured to a second end turn of the spring, at least one guide rod for coupling the first and second supports and allow displacement of the second support during deformation of the spring.
- the second support comprises a body forming an electromagnet, a ferromagnetic plate facing the body and movable relative to the body and a clamping means of the rod, the body, the plate and the clamping means being arranged so that the body is able to exert a magnetic force on the plate to actuate the clamping means to prevent movement of the second support along the rod.
- the rod is integral with the first and second supports outside the circumference of the spring, the second support having a guide cylinder through which the rod.
- the clamping means is an annular washer to the rod, deformable and positioned so that the plate and the body are able to deform the washer by a pressure resulting from the magnetic force to operate the clamping force on the rod.
- the second support further comprises means for spacing the plate and the body to allow the second support to move.
- the clamping means is integral with the body of the second support.
- the device also comprises a second spring concentric with the first spring, the second spring being secured to the first support by a first end turn and to a third support by a second end turn, the rod being coupled only to the first and second supports among the three supports.
- the device comprises at least two guide rods for securing the first and second supports, each of the rods comprising a clamping means.
- the invention relates to a motor vehicle comprising any one of the variants of the spring device.
- the stiffness of the spring device according to any one of the preceding variants.
- the method comprises the following successive steps:
- the equivalent stiffness is controlled at will by a predetermined and flexible strategy, dependent on information recorded by sensors or on command of the driver.
- the equivalent stiffness is not dependent on a compression level of the spring. A greater number of rolling situations is thus covered by a suitable stiffness.
- Figure 1 shows an embodiment of a device with two springs with equivalent stiffness controlled according to the invention.
- FIG. 2A represents a detailed view of the lower support of the spring having means for blocking its action.
- the view represents the moment of activation of the magnetic field preceding the spring lock.
- Figure 2B shows the same view of the lower support as Figure 2A. It represents a life situation when the clamping force is operative to lock the spring.
- the spring device 1 as described in the embodiment of Figure 1 comprises two springs, a lower spring 11 and an upper spring 15. Each of the springs is secured at its ends by a support.
- the lower spring 11 is secured by its lower turn to the lower support 12 and by its upper turn to the upper support 10.
- the upper support 10 is an intermediate piece providing the connection between the lower spring 11 and the upper spring 15. The upper spring 15 is thus secured by its lower turn to the support 10 and by its upper turn to the upper support 16.
- the upper support 16 is in the form of a disc covering the circumference of the spring 15. This disc may have a central opening then forming a cylinder, the spring 15 then resting on the edge of the cylinder.
- the lower support 12 may be in the form of a disc or in this embodiment is in the form of a cylinder, the spring 11 resting on the edge of the cylinder.
- the support 12 is composed of a cylindrical body coupled on its outer face with a plate of the form of a disk open at its center. The plate and the body are connected by a holding pin 124 of the plate. The support 12 will be described in more detail in the following description to present the locking means of the spring 11.
- guide rods 13 are secured to support 10 on the one hand and on the other hand at the lower support 12.
- One end of a rod 13 is fixedly mounted on the support 10 by a link 18, while the other end is mounted by a movable link 17 to the support 12 by means of a guide cylinder of the support lower 12.
- a rod 13 crosses and slides inside the support guide cylinder 12 when the latter, free, allows to obtain the most flexible stiffness.
- the spring device 1 comprises three rods 13 distributed over the periphery of the spring device 1 and coupled by pairs of links 18 and 17 each.
- the guide cylinders of the connection 17 are preferably distributed around the periphery of the lower support 12, the rods then being positioned outside the periphery of the spring 11.
- the fixed links of the rods 13 on the support 10 are distributed. on the periphery of the cylinder 10.
- the guide rods cover the length of the spring 11 only, and are therefore delimited in length by the support 10 and the support 12. These serve only to lock the spring 11.
- the guide rods can cover the length of the two springs and be integral with three supports.
- the links 18 and 17 are distributed so as to position their barycentre on the central axis of the spring 11, the three links of the sets 18 and 17 form an isosceles triangle on the surface of the body of the support 10 and support 12 respectively.
- other configurations may be provided in number of rods and positioning to guide and lock the spring 11.
- the guide rods 13 and mobile link 17 allow the movement of the support 12 along the axis of the rods.
- the spring 11 is operative and can be compressed when a force is exerted on the support 12.
- the springs 11 and 15 are concentric.
- the spring 15 is defined by a lower circumference of the spring 11, thus allowing it to be positioned partially inside the spring 11.
- Suitable supports, in the form of annular folds and curved inside the cylinder of the support 10, allow the supporting the upper coil of the spring 11 around the lower coil of the spring 15. This overlapping configuration of the springs 11 and 15 reduces the length of the spring device.
- the springs 11 and 15 may be concentric and of the same circumference.
- the spring device 1 then has springs positioned one above the other, without overlap.
- the intermediate piece 10 then has a shape adapted to this configuration.
- the spring 11 has a stiffness lower than the stiffness of the spring 15.
- the suspension debates the two springs are operative and the support 12 slides around the rods 13.
- the equivalent stiffness of the device to springs is equivalent to a system of two springs in series.
- FIG. 2A describes a partial section of the lower support 12 as well as the guide rod 13.
- the life situation corresponds to the instant of control of variation of the equivalent stiffness of the spring device 1.
- the two springs 11 and 15 are operative and an inhibition control of the spring 11 is controlled.
- the support 12 comprises a body 121 formed of a ferromagnetic material, a plate 122 covering the body 121, an electric coil 123 and a clamping means 126 of the rod 13.
- the plate 122 is also formed of a ferromagnetic material. This is maintained positioned at a distance of a few millimeters from the body 121 to promote the channeling of a magnetic force between the plate 122 and the body 121. This distance is also called gap.
- the body 121 comprising a coil 123 embedded inside the body forms an electromagnet.
- a magnetic field 129 is generated and channeled into the gap creating magnetic forces 128 operating a rimpedement of the plate 122 to the body 121.
- Plus l ' air gap is low, and the greater the magnetic stress is important.
- the gap is therefore chosen to be preferably about 1mm.
- a holding pin 124 is also provided to hold the plate 122 facing the body 121.
- the pin 125 passes through the plate 122 through an opening open on the lower outer face and opening through the inner face to an orifice in the body 121.
- the holding pin 124 is connected to the body 121 by contact in the orifice of the body 121.
- a return spring 125 makes it possible to exert a restoring force to hold the plate 122 at a distance from the body 121. This distance corresponds to the gap between the body 121 and the plate 122.
- the return spring 125 also facilitates the detachment of the plate 122 of the plate 121 when the magnetic field 129 is inhibited, releasing the constraint of the washer on the rod 13 .
- the guide rod 13 passes through the body 121 and the plate 122 by a cylinder 127 of the mobile link 17.
- the cylinder 127 allows the sliding of the support 12 along the rod.
- a clamping means 126 of the rod is positioned between the body 121 and the plate 122 so that it can be crushed by the body 121 and the plate 122.
- This is a Belleville type washer whose diameter interior decreases when crushed.
- the washer is annular around the rod 13.
- it is dimensioned so that the diameter of the rod is adjusted to the inner diameter of the washer.
- the washers 126 are distributed along the circumference of the support 12 in order to exert several clamping points on the rods 13. This makes it possible to improve the distribution of the clamping force and to reduce the clamping forces of each of the points, with regard to a solution with a single locking point as described in the state of the art.
- the magnetic force 128 is adapted to this distribution of the clamping points on the support 12 to prevent its movement in the majority of rolling situations.
- clamping means being secured to the support 12, it can be blocked at any time during a rolling situation, unlike the solution of the state of the art which blocks the spring only when the crushing exceeds a predefined crushing by the position of the stop.
- FIG. 2B shows the clamping life situation of the rod 13 by the washer 126 of the support 12, causing the spring 11 to be inhibited.
- the magnetic field 129 causes the washer 126 to be crushed by bonding the plate 122 on the body 121. Consequently, the washer exerts an annular clamping force on the rod 13, and the support 12 remains stationary relative to the support 10. The clamping force is exerted at three points of the support circumference 12. The spring 11 then no longer exerts its flexibility function.
- the support 10, the support 12 and the rods 13 form a rigid assembly inhibiting the function of the spring 11. Only the spring 15 is operative. The latter having a stiffness greater than that of the spring 11, the equivalent stiffness of the spring device 1 is greater in this configuration.
- the spring device 1 can be controlled by an equivalent stiffness control device.
- the control device comprises means for recording rolling information, for example trajectory sensors, sensors for measuring suspension travel, vertical acceleration sensors for the wheels or the body, steering angle sensor, or information drivers initiated by the driver, for example a request to change the equivalent stiffness.
- the control device prepares a request for driving the electromagnet of the support 12 of the spring device 1.
- a first request orders the locking of the spring 11 and a second request orders the release of the spring 11.
- the first request controls the generation of an electric current in the coil 123 of the support 12.
- the electromagnet then generates the magnetic field 129 for operating the clamping force.
- the second request commands the stop of the electric current in the coil 123, ending the clamping force.
- the spring device 1 with controlled stiffness makes it possible, on request, to adapt the equivalent stiffness and to effectively address the stiffness equivalent to the rolling situations. The compromise of comfort and cash handling adapts well to the various situations of life of the vehicle.
- the invention is particularly suitable for motor vehicles having electromechanical means for controlling an electric current sufficient to control an electromagnet.
- the control device makes it possible to improve the comfort and ride ratio of a motor vehicle during driving and reactivity in response to a control of variation of stiffness.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
- Springs (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1451133A FR3017337B1 (fr) | 2014-02-13 | 2014-02-13 | Dispositif a ressorts ayant une raideur commandee |
| PCT/FR2015/050151 WO2015121556A1 (fr) | 2014-02-13 | 2015-01-22 | Dispositif a ressorts ayant une raideur commandee |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3105071A1 true EP3105071A1 (fr) | 2016-12-21 |
Family
ID=50729648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15704350.6A Withdrawn EP3105071A1 (fr) | 2014-02-13 | 2015-01-22 | Dispositif a ressorts ayant une raideur commandee |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3105071A1 (fr) |
| FR (1) | FR3017337B1 (fr) |
| WO (1) | WO2015121556A1 (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105216636B (zh) * | 2015-10-28 | 2017-09-05 | 广西大学 | 一种可调刚度的受电弓弹簧盒 |
| FR3061249B1 (fr) * | 2016-12-22 | 2020-05-22 | Schneider Electric Industries Sas | Dispositif de guidage d'un ressort dans un mecanisme de commande et appareil de protection electrique le comportant |
| US10527025B2 (en) * | 2018-01-05 | 2020-01-07 | Untied Technologies Corporation | Variable spring rate engagement mechanism |
| US11021029B2 (en) | 2018-02-28 | 2021-06-01 | Eric Harrison | Vehicle suspension assembly and method |
| RU2705604C1 (ru) * | 2019-02-12 | 2019-11-11 | Алексей Васильевич Гаврилов | Пружинная подвеска с регулируемым дорожным просветом |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2677929A1 (fr) * | 1991-06-24 | 1992-12-24 | Bianchi Mauro Sa | Procede de suspension pour vehicules utilisant deux raideurs, destinees respectivement a l'obtention d'un bon niveau de confort et d'un bon niveau de comportement. |
| DE102007030549A1 (de) * | 2007-06-30 | 2009-01-02 | Zf Friedrichshafen Ag | Kolben-Zylinderaggregat |
| US8210547B2 (en) * | 2009-06-16 | 2012-07-03 | Toyota Motor Engineering & Manufacturing North America, Inc. | Active magneto-rheological spring assemblies and vehicle suspension systems incorporating the same |
-
2014
- 2014-02-13 FR FR1451133A patent/FR3017337B1/fr active Active
-
2015
- 2015-01-22 EP EP15704350.6A patent/EP3105071A1/fr not_active Withdrawn
- 2015-01-22 WO PCT/FR2015/050151 patent/WO2015121556A1/fr not_active Ceased
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2015121556A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3017337B1 (fr) | 2016-02-19 |
| WO2015121556A1 (fr) | 2015-08-20 |
| FR3017337A1 (fr) | 2015-08-14 |
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