FR2805868A1 - Elastic component such as compression spring used in vehicle manufacture is made from cylinder of flexible material with series of transverse slots - Google Patents

Elastic component such as compression spring used in vehicle manufacture is made from cylinder of flexible material with series of transverse slots Download PDF

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Publication number
FR2805868A1
FR2805868A1 FR0002694A FR0002694A FR2805868A1 FR 2805868 A1 FR2805868 A1 FR 2805868A1 FR 0002694 A FR0002694 A FR 0002694A FR 0002694 A FR0002694 A FR 0002694A FR 2805868 A1 FR2805868 A1 FR 2805868A1
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FR
France
Prior art keywords
gt
lt
elastic member
characterized
member according
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Withdrawn
Application number
FR0002694A
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French (fr)
Inventor
Gilles Berthias
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.)
Peugeot Citroen Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
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 Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Priority to FR0002694A priority Critical patent/FR2805868A1/en
Publication of FR2805868A1 publication Critical patent/FR2805868A1/en
Application status is Withdrawn legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00Springs
    • F16F1/02Springs 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
    • F16F1/025Springs 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 characterised by having a particular shape
    • F16F1/028Springs 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 characterised by having a particular shape cylindrical, with radial openings

Abstract

The elastic component, e.g. a compression spring, is made from a cylinder or cone of a flexible material such as steel or a polymer. It has end rings (11, 12) and a series of transverse slots cut in it, offset relative to one another in adjacent rows and forming transverse flexible bars and lengthwise thrust members. The bars are able to flex under pressure, while the thrust members are in line and resist compression.

Description

The present invention relates to an elastic member, spring type <B> to </ B> compression, particularly used in the automotive industry.

More precisely, the invention relates to an elastic member comprising a plurality of beams each of which is supported by two supports spaced apart from one another in a longitudinal direction, and works in flexion between its two supports. <B> under </ B> the effect of a force applied transversely <B> to </ B> the longitudinal direction and transmitted <B> to </ B> this beam by a force transmission element, intermediate between its supports.

Such elastic members have been widely used in the automotive industry as "springs <B> to </ B> flexion blades" to equip the suspensions of light vehicles <B> or </ B> trucks, these springs most often taking the form of a stack of parallel blades held tight together by their middle, and increasing length.

However, not only these very bulky springs are practically dedicated <B> to </ B> this specific application, but they are even, in their preferred application, increasingly replaced by coil springs, the latter being particularly appreciated for their compactness, and making them the object of countless applications in all areas of mechanics.

In this context, one of the merits of the invention has precisely been to recognize that <b> '</ b> icoldaux springs, despite their universal success, had limitations, particularly in terms of their stiffness in relation to their weight, and in terms of the fundamental frequency of resonance, which it was possible to repel.

The object of the invention is therefore to propose a new type of spring, particularly usable in place of a coil spring, but with superior performance.

<B> A </ B> this end, the spring of the invention, moreover compliant <B> to </ B> the generic definition given in the preamble above, is essentially characterized in that the beams are arranged in pairs to form a stack of elementary deformable cells which extends along an axial dimension, transverse <B> to </ B> the longitudinal direction, the beams of the same pair forming the same cell sharing the same supports and being spaced apart from each other by these supports, and the stack comprising at least one common force transmission element <B> to two cells spaced apart from each other along the axial dimension, and connecting first and second respective beams of these two cells.

In a preferred embodiment of the invention, the elementary deformable cells are arranged in a quinconce to form a two-dimensional cell network in which each cell has at least one shared beam and two other adjacent cells, and in which each of the supports of the beams of a same cell constitutes force transmitting element for a beam of at least one other cell.

This two-dimensional network can thus form a tube whose two axial ends are spaced apart from one another in axial dimension, this tube adopting for example a form of a ring or cylinder of circular cross-section, elliptical, or absolutely whatever, and which can be both constant and evolutive depending on the axial dimension.

Thus, while the helical springs consist of a single wire wound in cylindrical turns working essentially in torsion, the deformable cells which constitute the spring of the invention work essentially in bending.

In an embodiment well adapted to industrial requirements, the beams, the supports and the force transmission elements are made by hollowing out a layer of a homogeneous material.

Although it is possible to modify the characteristics of the spring of the invention by choosing connection point of each force transmission element on a beam, the spring of the invention can, for most applications, be designed so that each force transmitting element is disposed in the middle of a beam.

To ensure a homogeneous distribution of <B> f </ B> applied compression <B> to </ B> a compliant tubular spring <B> to </ B>, the tube constituting this spring can be bordered, at least one of its two axial ends, by a ring, preferably wider and more rigid each of the beams.

The spring of the invention may a priori be made of any material having suitable elastic properties, especially steel or a polymer polyamide <B> 6-6. </ B>

The spring of the invention may also take the most diverse sizes, and may for example be sized to constitute a return spring of a thermal engine valve <B> or </ B> be sized to constitute a suspension spring from a <B> vehicle to </ B> engine.

Other characteristics and advantages of the invention will become clear from the description which is given herebelow, indicative and in no way limitative, with reference to the appended drawings, in which <B>. </ B> B>: </ B> <B> - </ B> Figure <B> 1 </ B> is a schematic view of an elementary network of beams and supports belonging to a compliant spring <B> to </ B> the invention; FIG. 2 is a schematic view of a two-dimensional network of beams and supports belonging to a spring conforming to the invention; <B> - </ B> Figure <B> 3 </ B> is a side view of a visible face, a tubular spring conforming to the invention, shown at rest; FIG. 4 is a perspective view of the illustrated spring at <B> 3; </ B> and <B> - </ B> Figure <B> 5 </ B> is a side view of a visible face of a tubular spring conforming to the invention, shown under stress. As shown in FIG. 1, the invention relates to an elastic member, or spring, comprising a set of beams such as DAB, DFG, IFG and IKL.

Each beam is supported by two supports such as CD, <B> DE, </ b> HI and IJ, which are spaced <B> 1 1 </ B> one of <B> 1 1 </ B> other following a longitudinal direction M.

In this configuration, each beam can work in bending between its two supports under the effect of a force W which is applied transversely <B> to </ B> the longitudinal direction <B> 1 </ B> and which is transmitted <B> to </ B> this beam by a force transmission element such as AB, <B> FG, FG </ B> and KL, intermediate between the supports CD, <B> DE, </ B> HI and IJ of this beam.

According to the invention, the beams such as DAB, DFG, IFG and IKL are arranged in pairs, such as DAB and DFG on the one hand, and IFG and IKL on the other hand, to form a stack of elementary deformable cells such as B> D, </ B> I which extends along an axial dimension X2, transverse <B> to </ B> the longitudinal direction In the sense that the present description gives to the word "transverse", a second direction is considered transverse <B> to </ B> a first direction since it is not parallel <B> to </ B> this first direction, however, it being understood that this second direction is preferably, with the first direction direction, an angle at least close to a right angle.

According to the invention, on the other hand, the beams of the same pair of beams, such as DAB and DFG, form a single cell, in this case the cell <B> D, </ B> share the same supports as CD and <B> DE, </ B> and are spaced from each other by these supports.

Finally, this stack comprises at least one force transmission element, such as <B> FG, </ B> which is common <B> to two cells spaced apart from one another according to the axial dimension X2, such as cells <B> D, </ B> I, and which connects respective beams of these two cells, namely the beams DFG and IFG. Nevertheless, in order to develop most of its advantages, the spring of the invention preferably has the more complex structure illustrated in FIG. 2.

In such a structure, the elemental deformable cells, in this case denoted by <B> A to G, </ B> are staggered to form a two-dimensional array of cells.

Each cell of this network, such as the lule <B> D, </ B> has at least one beam, such as the beam DFG, which is shared by two other adjacent cells, in this case by the cells F and < B> G. </ B>

Moreover, each of the supports of the beams of the same cell, for example each of the supports CD and DE of the beams DAB and DFG of the cell D, is an element of force transmission for a beam of at least one other cell, in this case for the lower beams (in FIG. 2) of cells <B> A </ B> and B, and for the upper beams of the cells F and <B> G. </ B>

In most of the applications that can be envisaged for the spring of the invention, the two-dimensional network which has just been described forms, as shown in FIGS. 3 to 5, a tube whose two ends axial <B> 11, </ B> 12 are spaced apart from each other along the axial dimension X2.

This tube may for example take the form of a cone or cylinder of circular cross section, elliptical, or absolutely any cross-section that can itself be as constant as being scalable axial dimension X2.

As best shown in FIG. 4, the beams, supports and force-transmitting members of the spring of the invention are preferably made by hollowing out a layer of homogeneous material. this recess can itself be made for any means such as molding, machining or stamping. The spring of the invention can thus be made of various materials, in particular steel or a polymer such as polyamide <B> 6-6. </ B>

Although each force transmitting element can be connected <B> to </ B> a beam <B> at </ B> distance from the middle of it to increase the spring stiffness, as shown in Figure 2 the Most of the applications of the spring of the invention allow <B> to </ B> connect each force transmission element to the middle of each beam, as shown in Figures <B> 3 to 5. </ B>

When the spring of the invention adopts the form of a tube, it may be expedient, to improve the distribution on all the cells of the force applied to this. spring, provide that one of the axial ends <B> 11, </ B> 12 of this spring, or both, be lined (s) by a ring of greater width <B> to </ B> each of the beams .

Although this possibility has not been illustrated, spring cells themselves may have different shapes or thicknesses depending on the location they occupy in this spring, to locally modify the stiffness or more generally the characteristics of this spring. latest.

The spring of the invention has many advantages.

In particular, it can replace a conventional helical spring even stiffness with a substantially lower weight and for example five times lower.

Correlatively, the spring of the invention has a much higher self-resonance frequency than that of a coil spring of the same stiffness, this natural frequency being in fact proportional to the (K / M) # 4, where K is stiffness spring, and M its mass.

Given the possibility, in the spring of the invention, to easily change the size, shape, radial thickness, and density of the cells, so also the thickness of the beams, such a spring can be designed to oppose <B> to </ B> the compression force W a relatively complex and reproducible reaction force, which is very difficult <B> to </ B> get with a coil spring.

Furthermore, the spring of the invention, when adopting the shape of a tube, has an isotropic behavior vis-à-vis a compression force W, unlike conventional helical springs, which tend <B> to </ B> to bend in one direction or another, according to the angular position the cut of the turn <B> to </ B> each of the extremities of this spring.

All of these qualities give the spring the invention the possibility of being used in a very large number of applications.

In particular, given its high inherent resonance, this spring is particularly suitable for its use as a return spring of a thermal engine valve, or as a suspension spring of a vehicle <B> to </ B> engine, each of these applications requiring only a specific dimensioning of this spring.

Claims (1)

  1. <U> CLAIMS </ U> <B> 1. </ B> An elastic member comprising a plurality of beams (DAB, DFG, IFG, IKL) each of which is supported by two supports (CD, <B> DE; < / B> HI, IJ) spaced from each other in a longitudinal direction (Xi), and flexed between its two supports (CD, <B> DE; </ B> HI, IJ) under the effect a force <B> M </ B> applied transversely <B> to </ B> the longitudinal direction (Xi) and transmitted <B> to </ B> this beam (DAB, DFG; IFG, IKL) by a force transmission element (AB, <B> FG; <B> FG, </ B> KL) <B>, </ B> intermediate between its supports (CD, <B> DE; </ B> HI, IJ) <B>, </ B> characterized in that the beams (DAB, DFG, IFG, IKL) are arranged in pairs to form a stack of elementary deformable cells <B> (D, </ B > I) which extends along an axial dimension (X2), transverse <B> to </ B> the longitudinal direction (Xi) <B>, </ B> the beams (DAB, DFG) of the same pair forming the same cell <B> (D), </ B> sharing the s the same supports (CD, <B> DE) </ B> and being spaced from each other by these supports, and the stack comprising at least one force transmitting element <B> (FG) </ B> common <B> to </ B> two cells <B> (D, </ B> I) spaced from each other along the axial dimension (X2), and connecting first and second respective beams (DFG , IFG) of these two <B> cells (D, </ B> I). 2. Elastic member according to claim 1, characterized in that the elementary deformable cells <B> (A, B), C, DE, F, <B> B> G) </ B> are staggered to form a two-dimensional network of cells in which each <B> (D) </ B> cell has at least one beam (DFG) shared by two other adjacent cells (F, <B> G) </ B> and in which each of the supports (CD, <B> DE) </ B> of the beams (DAB, DFG) of the same cell <B> (D) </ B> constitutes a force transmission element (CD; <B> DE) </ B> for a beam of at least one other cell <B> (A, <B> F; B, <B> G). </ B> <B> 3. </ B> Elastic member according to claim 2, characterized in that the two-dimensional network forms a tube whose two axial ends <B> (11, </ B> 12) are spaced one the other according to the axial dimension (X2). 4. elastic member according to claim 2 or <B> 3, </ B> characterized in that the two-dimensional array has a cylindrical shape. <B> 5. </ B> elastic member according to claim 2 or <B> 3 </ B> characterized in that the two-dimensional array has a conical shape. <B> 6. </ B> Elastic member according to any one of the preceding claims, characterized in that beams, supports and force transmission elements are made by hollowing out a layer of a homogeneous material. <B>. </ B> Elastic member according to any one of the preceding claims, characterized in that each force transmission element <B> (FG) </ B> is arranged in the middle of a beam (DFG, IFG ). <B>. </ B> elastic member according to any one of the preceding claims combined <B> to </ B> the claim <B> 3 </ B> characterized in that the tube is bordered, <B> to </ B> at least one of its two axial ends <B> (il, </ B> 12), by a ring (120). <B>. </ B> Elastic member according to any preceding claim, characterized in that it is sized to constitute a return spring of a thermal engine valve. <B> 10. </ B> Elastic member according to any one of claims 1 to 8, characterized in that it is sized to constitute a suspension spring of a motor vehicle. <B> 11. </ B> Elastic member according to any one of the preceding claims, characterized in that it is made of steel. 12. Elastic member according to any one of claims <B> 1 to 8, characterized in that it is constituted by a polymer such as polyamide <B> 6-6. </ B>
FR0002694A 2000-03-02 2000-03-02 Elastic component such as compression spring used in vehicle manufacture is made from cylinder of flexible material with series of transverse slots Withdrawn FR2805868A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0002694A FR2805868A1 (en) 2000-03-02 2000-03-02 Elastic component such as compression spring used in vehicle manufacture is made from cylinder of flexible material with series of transverse slots

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FR0002694A FR2805868A1 (en) 2000-03-02 2000-03-02 Elastic component such as compression spring used in vehicle manufacture is made from cylinder of flexible material with series of transverse slots

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FR2805868A1 true FR2805868A1 (en) 2001-09-07

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1916056A1 (en) * 2006-10-26 2008-04-30 Step-Tec AG Spring sleeve
WO2009094793A1 (en) * 2008-01-28 2009-08-06 Tecpharma Licensing Ag Plastic spring
US8834419B2 (en) 2008-06-19 2014-09-16 Cilag Gmbh International Reusable auto-injector
US8845594B2 (en) 2008-06-19 2014-09-30 Cilag Gmbh International Auto-injector with filling means
US8939958B2 (en) 2008-06-19 2015-01-27 Cilag Gmbh International Fluid transfer assembly for a syringe
US8968236B2 (en) 2005-04-06 2015-03-03 Cilag Gmbh International Injection device
US9028451B2 (en) 2006-06-01 2015-05-12 Cilag Gmbh International Injection device
US9028453B2 (en) 2008-06-19 2015-05-12 Cilag Gmbh International Reusable auto-injector
US9072833B2 (en) 2006-06-01 2015-07-07 Cilag Gmbh International Injection device
US9358346B2 (en) 2005-08-30 2016-06-07 Cilag Gmbh International Needle assembly for a prefilled syringe system
RU2603432C2 (en) * 2015-01-16 2016-11-27 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" - Госкорпорация "Росатом" Hydraulic stop
US9649441B2 (en) 2005-04-06 2017-05-16 Cilag Gmbh International Injection device (bayonet cap removal)
US9675757B2 (en) 2004-05-28 2017-06-13 Cilag Gmbh International Injection device
US9675758B2 (en) 2004-05-28 2017-06-13 Cilag Gmbh International Injection device
US9682194B2 (en) 2008-06-19 2017-06-20 Cilag Gmbh International Re-useable auto-injector with filling means
US9731080B2 (en) 2005-04-06 2017-08-15 Cilag Gmbh International Injection device
US9757520B2 (en) 2006-06-01 2017-09-12 Cilag Gmbh International Injection device
US9770558B2 (en) 2005-09-27 2017-09-26 Cilag Gmbh International Auto-injection device with needle protecting cap having outer and inner sleeves
US9895493B2 (en) 2004-05-28 2018-02-20 Cilag Gmbh International Injection device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB482306A (en) * 1936-09-28 1938-03-28 Friederich Eugen Maier Improvements relating to spring connecting units
EP0271355A2 (en) * 1986-12-12 1988-06-15 Everett Harrow Schwartzman Improved integral spring flexure for use with high speed rotating shafts
US4858897A (en) * 1987-11-16 1989-08-22 Hideki Irifune Spring
US5062619A (en) * 1989-04-03 1991-11-05 Nabeya Kogyo Co., Ltd. Non-linear spring

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB482306A (en) * 1936-09-28 1938-03-28 Friederich Eugen Maier Improvements relating to spring connecting units
EP0271355A2 (en) * 1986-12-12 1988-06-15 Everett Harrow Schwartzman Improved integral spring flexure for use with high speed rotating shafts
US4858897A (en) * 1987-11-16 1989-08-22 Hideki Irifune Spring
US5062619A (en) * 1989-04-03 1991-11-05 Nabeya Kogyo Co., Ltd. Non-linear spring

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9895493B2 (en) 2004-05-28 2018-02-20 Cilag Gmbh International Injection device
US9675758B2 (en) 2004-05-28 2017-06-13 Cilag Gmbh International Injection device
US9675757B2 (en) 2004-05-28 2017-06-13 Cilag Gmbh International Injection device
US9731080B2 (en) 2005-04-06 2017-08-15 Cilag Gmbh International Injection device
US9649441B2 (en) 2005-04-06 2017-05-16 Cilag Gmbh International Injection device (bayonet cap removal)
US8968236B2 (en) 2005-04-06 2015-03-03 Cilag Gmbh International Injection device
US9358346B2 (en) 2005-08-30 2016-06-07 Cilag Gmbh International Needle assembly for a prefilled syringe system
US9770558B2 (en) 2005-09-27 2017-09-26 Cilag Gmbh International Auto-injection device with needle protecting cap having outer and inner sleeves
US9072833B2 (en) 2006-06-01 2015-07-07 Cilag Gmbh International Injection device
US9028451B2 (en) 2006-06-01 2015-05-12 Cilag Gmbh International Injection device
US9757520B2 (en) 2006-06-01 2017-09-12 Cilag Gmbh International Injection device
EP1916056A1 (en) * 2006-10-26 2008-04-30 Step-Tec AG Spring sleeve
WO2009094793A1 (en) * 2008-01-28 2009-08-06 Tecpharma Licensing Ag Plastic spring
US9028453B2 (en) 2008-06-19 2015-05-12 Cilag Gmbh International Reusable auto-injector
US8834419B2 (en) 2008-06-19 2014-09-16 Cilag Gmbh International Reusable auto-injector
US9682194B2 (en) 2008-06-19 2017-06-20 Cilag Gmbh International Re-useable auto-injector with filling means
US8939958B2 (en) 2008-06-19 2015-01-27 Cilag Gmbh International Fluid transfer assembly for a syringe
US8845594B2 (en) 2008-06-19 2014-09-30 Cilag Gmbh International Auto-injector with filling means
RU2603432C2 (en) * 2015-01-16 2016-11-27 Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" - Госкорпорация "Росатом" Hydraulic stop

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