FR2825126A1 - ANTI-ROTATION AND ANTI-MIGRATION SYSTEM OF A SPRING ON ITS SUPPORTS - Google Patents

Abstract

The invention relates to an anti-rotation and anti-translation device for a spring suspension system comprising a coil spring (2) and at least one support cup (1, 11, 41) of the end coil (4). ) of said spring characterized in that said cup comprises: - an at least partially peripheral shoulder (7, 17, 47) capable of supporting a first portion (4A) of said end turn, and - at least one groove section ( 9, 19, 29, 39, 49, 59) at least partially peripheral ensuring the radial locking of a second portion (4B) of said end turn (4).

Description

the instant tx.

  The present invention relates to an anti-rotation and anti-rotation device.

  travel for a spring suspension system comprising a helical spring and at least one end-bearing support cup

said spring.

  The present invention applies in particular but not

  exclusively in the field of motor vehicles.

  It is understood that the components of the suspension systems are subjected to varying forces in amplitude and intensity. It is therefore desirable that the bearing surfaces of the cups have a geometry o allowing the suspension systems to support variable loads

  without compromising their efficiency and vehicle safety.

  In general, for the sake of optimizing the suspension system, the spring has very local contacts on its support cups which may cause the relative movement of the turns

  s of the ends of the spring with respect to their supports.

  This displacement has the effect of weakening the suspension system, in particular by friction. This is likely to cause premature wear which may cause partial rupture of the

  suspension system and risk of accident.

  In addition, since generally in the suspension systems, the springs and the cups are stuck in metallic material, their mutual contacts are accompanied by sound vibrations or squeaks which affect driving comfort and accelerate wear.

  premature suspension systems.

  There is therefore a real need to improve the interaction between the end turn of the spring and the support cup to avoid or at least limit the displacement of the end turn while retaining

very localized contacts.

  To achieve this object, according to the invention, the anti-rotation and anti-translation device for a spring suspension system comprising a helical spring and at least one bearing cup for the end turn of said spring is characterized in that that said cup comprises: - an at least partially peripheral shoulder capable of supporting a first portion of end turn, and - at least one at least partially peripheral groove section ensuring the radial locking of a second portion of

end turn.

  One of the advantages here lies in the fact that a rotation is limited or even eliminated since at least one groove section blocks a portion of the end turn. This blocking contributes to limiting sound vibrations or other oscillations detrimental to driving comfort and increases the service life

of the suspension system.

  In addition, the present support cup has advantages over known cups o since it limits or even eliminates the relative translations of the end turn relative to the support cup. The wedging or blocking of the end turn on its support cup improves driving comfort and limits the wear of the constituent parts of the suspension system and preserves the other surrounding parts likely

  s to be influenced by the oscillations of the suspension system.

  According to another characteristic of the invention, provision is made for the groove to be able to retain the second portion of the end turn axially. The advantage of this arrangement lies in the fact that thanks to the axial retention of the end turn portion by the groove, the quality and the effectiveness of the blocking are further improved. This results in a reduction in sound vibrations and therefore in the wear of the system components. According to another characteristic of the invention, at least one groove section is V-shaped. This arrangement is advantageous since a V-profile has only two opposite facing surfaces on which the end turn is supported, but which nevertheless make it possible to retain

  axially and block a portion of the end turn.

  o An easy embodiment is therefore obtained in terms of the manufacturing method. Indeed, a V-shaped throat section can

  be obtained for example by a simple folding process.

  In addition, the forces exerted by the end turn on the support cup are advantageously distributed between these two surfaces when the groove is V-shaped. Another advantage lies in the fact that a V-shaped groove can

  s accommodate different sections of helical spring coils.

  Another characteristic specifies that the V-shaped section of

  the groove defines an angle between 15 and 135.

  According to another advantageous embodiment, the cup comprises a plurality of sections of grooves ensuring blocking o multiple of a plurality of corresponding portions of an end turn. Multiple blocking is advantageous since it makes it possible to adapt the groove sections to the specific wear conditions of each section, that is to say that a precise geometry and a given coating are likely to be chosen according to the loads undergone through each throat section. This arrangement will further improve the anti-rotation, anti-translation and anti-vibration properties of the present invention. According to another characteristic, the groove section has a length

  o angular between O and 360.

  According to another embodiment, the cup has a triangular central wall having a function of spacer connecting between the

  minus a throat section and a shoulder.

  This arrangement is advantageous since a saving of material

  s is realized in relation to a central wall in the form of a disc.

  According to another alternative embodiment, at least part of the cup and / or of the spring is provided with a coating of material

phonically insulating.

  The advantage here lies in the fact that such a coating will contribute even more to reducing wear and the sound vibrations which would have

  resulting from the friction of metallic surfaces in contact.

  The use of a suitable material is also likely to improve the anti-rotation and anti-translation properties of the device of the

present invention.

  Examples of embodiments of the invention are shown schematically in the accompanying drawings, which show: FIG. 1 represents a sectional view of an embodiment of the spring suspension system of the invention comprising

  a helical spring and a support cup.

  FIG. 2 represents a plan view of the support cup of the mode

Figure 1.

  Figure 3 shows a plan view of an alternative embodiment of the invention. Figure 4 shows a plan view of another embodiment

of the invention.

  Figure 5 shows a partial sectional view of a groove section

  according to another alternative embodiment.

  s The suspension system shown in Figure 1, is essentially constituted by a helical spring 2 and a cup

  of a pp ui 1 makes ue so l idai re of the drum of the shock absorber (not shown).

  The inclination of the cup allows you to orient the line if necessary

  spring action to reduce friction in the suspension.

  o This inclination is generally between 1 and 15.

  The support cup shown in FIGS. 1 and 2 has a circular shape having a partially peripheral shoulder 7 and a partially peripheral groove section 9 also. The groove section 9 has a V-shaped section. S This V-shaped groove section 9 is delimited internally by two opposite side surfaces 6 and 8. The radially inner surface 6 of the V extends in the axial direction and forms with the surface radially

  exterior 8 an angle between 15 and 135.

  The angular length of the groove section 9 is defined by the angle

between 0 and 360.

  The support cup 1 shown is a lower support cup. The present invention is however not limited to lower support cups and is likely to also be suitable for

upper support cups.

  The support cup has a central wall 5. This is represented in FIGS. 1 to 3 in the form of a solid disc, however if this is likely to have another shape such as for example

a triangular shape.

  This cup receives on its periphery the lower end turn 4 of the helical spring 2. The partially peripheral shoulder 7 supports a first portion 4A of the end turn 4 and o a partially peripheral groove section 9 ensures the radial blocking

  of a second portion 4B of the end turn 4.

  FIG. 3 shows another embodiment comprising a support cup 11 which comprises two partially peripheral groove sections 19 and 29 ensuring the radial locking of two portions of the end turn. In addition, in the same way as the cup 1 has an at least partially peripheral shoulder 7, the

  cup 11 includes a similar shoulder 17.

  The embodiment of FIG. 3 is particularly interesting since it makes it possible to adapt the geometry of the throat and shoulder sections to optimally meet the requirements

of a given force system.

  The elements that can be adjusted mainly include, the angular length of each groove section, the opening angle c of the V-shaped groove, and the materials used for the sections

respectively.

  Figure 4 shows yet another embodiment of the invention in which the cup 41 has a central wall

substantially triangular 45.

  This arrangement is advantageous because a central or triangular wall allows a significant saving of material in comparison

  with a disc-shaped central wall.

  The pa ro i ce ntra tri ang u la ire 45 is rounded in s ang es what i can accommodate in the periphery of the triangular central wall of throat sections eVou shoulders capable of forming surfaces

  support for the lower end turn 4.

  The wall 45 thus forms a connecting spacer between the groove sections 39 and 49 and the shoulder 47 which are arranged partially at the periphery in the rounded angles of the triangle. The groove sections 39 and 49 and the shoulder 47 have characteristics similar to the throat sections and the shoulders

previously described.

  The groove sections 39 and 49 make it possible in particular to ensure the radial locking o of corresponding portions of the lower end turn. In addition, the shoulder 47 is capable of supporting a portion

  corresponding to the end turn.

  The triangular central wall 45 has a solid surface.

  In the interests of saving material, it may however be particularly advantageous if the triangular central wall has a

obviously 40.

  FIG. 5 shows another embodiment in which a groove section 59 is covered by a coating of soundproofing material. The material chosen can, for example, be a

  o polymer such as an elastomer and, where appropriate, a composite material.

  Generally, the end of the end turn is indexed in rotation by a transverse stop (not shown) which is integral with

the cup.

  The position of this stop is determined according to the geometry of the spring (in particular the number of turns), the position of the line of action and the angular length of the groove in V.

Claims (7)

claims   1. Anti-rotation and anti-translation device for a spring suspension system comprising a helical spring (2) and at least one support cup (1, 11, 41) of the end turn (4) of said spring characterized in that said cup comprises: - a shoulder (7, 17, 47) at least partially peripheral capable of supporting a first portion (4A) of said end turn o, and - at least one groove section (9 , 19, 29, 39, 49, 59) at least partially peripheral ensuring the radial locking of a   second portion (4B) of said end turn (4).   2. Device according to claim 1, characterized in that s said groove (9, 19, 29, 39, 49, 59) is able to axially retain the   second portion (4B) of the end turn.   3. Device according to claim 1 or 2, characterized in that at least one groove section (9,19, 29, 39, 49, 59) is V-shaped. 4. Device according to claim 3, characterized in that the V-shaped section of the groove (9, 19, 29, 39, 49, 59) defines an angle (a) between 15 and 135.   5. Device according to one of the preceding claims, characterized   in that the cup (11) comprises a plurality of groove sections (19, 29) ensuring multiple blocking of a plurality of portions   corresponding to an end turn (4).   6. Device according to one of the preceding claims characterized   in that said groove section (9) has an angular length () included between O and 360.   7. Device according to any one of the claims   o previous, characterized in that the cup (41) has a triangular central wall (45) having a function of spacer connecting   at least one groove section (39, 49) and a shoulder (47). DO - F_ I   PREVIOUSLY, CHARACTERIZED IN THAT IN THE HANDS A PARSE OF THE CUT (1, 11, 41) EMU OF THE SODOD (2) IS PROVIDED WITH A COVER (3) FROM MATERIAL