Lower support for a rotating suspension stop and associated suspension strut

Abstract

An annular lower support for a rotating suspension stop 12 of a suspension leg 10 forming an annular bearing surface 32, and an annular skirt 34 comprising a lower edge 36 having axial serrations forming an annular alternation of axially projecting teeth 38 and gaps 40 separating the teeth 38 in pairs. (Fig. 1)

Description

Title of the invention: Lower support for a rotating suspension stop and associated suspension leg. TECHNICAL FIELD OF THE INVENTION

[0001] The invention relates, in general, to the technical field of automotive suspensions. It relates more specifically to a support for a suspension stop for a suspension strut intended to be mounted to a superstructure of a vehicle, in particular a chassis or body of a motor vehicle. PREVIOUS STATE OF THE ART

[0002] Vehicle suspension legs generally include suspension stops which form the interface between, on the one hand, a helical spring and possibly a telescopic shock absorber of the suspension leg, and on the other hand, a vehicle superstructure, to transmit, where appropriate by filtering and / or damping them, the axial forces of the spring and the telescopic shock absorber, while ensuring a degree of rotational freedom around the axis of the spring.

[0003] For example, document FR2975947 B1 describes a suspension bump stop comprising a bump stop cover connected to the vehicle superstructure, a lower support on which the coil spring of the suspension strut rests, and a roller bearing located between the lower support and the bump stop cover. The lower support of the suspension bump stop is made of plastic material, optionally overmolded onto a metal insert, which has the advantage of being lightweight and inexpensive to manufacture, even for parts with complex geometry.

[0004] The plastic bump stop support without an insert is not suitable for all vehicles because it cannot withstand excessive loads. Furthermore, it presents recycling problems. The metal insert, on the other hand, causes corrosion problems in use and requires costly anti-corrosion treatments.

[0005] It has been proposed to develop lower supports for one-piece suspension stops made entirely of light aluminum or zinc alloy, by molding, as disclosed in French application FR3099415 AL. The resulting part is rigid, perfectly recyclable, and does not require anti-corrosion treatment, but it is massive and relatively heavy, requiring a large volume of material, especially since the shapes must remain simple to avoid machining operations after mold removal. Description of the invention

[0006] The invention aims to remedy the disadvantages of the prior art and to provide a lower support for a suspension leg that is lighter and less expensive, while preserving its robustness.

[0007] To this end, the invention relates to an annular lower support for a rotating suspension stop of a suspension leg, the lower support having a volume of material and forming an annular bearing surface centered on a reference axis and rotated axially in a downward axial direction to bear directly or indirectly, in a bearing plane perpendicular to the reference axis, against an upper coil of a helical spring of the suspension leg, and an annular skirt projecting axially from the annular bearing surface in the downward axial direction, the annular skirt comprising a lower edge having axial serrations forming an annular alternation of axially projecting teeth and gaps separating the teeth two by two,the lower edge having at least one point of intersection with an upper plane perpendicular to the reference axis and at least one point of intersection with a lower plane perpendicular to the reference axis, such that the lower edge is entirely situated between the lower plane and the upper plane, the lower support being notable in that a lower portion of the lower support, situated between the upper plane and the lower plane, is situated entirely within an envelope having rotational symmetry about the reference axis, and the volume of material of the lower support is less than 96%, preferably 92%, of a volume obtained by adding the volume of an upper portion of the lower support situated above the upper plane, and the volume of the envelope.

[0008] The serrations on the lower edge, via the teeth, allow the annular skirt to be extended axially, thus ensuring the centering of the helical spring around the reference axis, while the voids reduce the volume of material forming the lower support, thereby lightening said lower support. The lower support, according to the invention, has a reduced volume of material and is therefore lighter and consequently less expensive.

[0009] According to one embodiment, the lower plane is located at a distance DI from the upper plane and at a distance D2 from the support plane, such that D1 / D2 >0.3, and preferably D1 / D2 >0.5.

[0010] The crenellation then presents a non-negligible axial dimension. Indeed, the crenellation thus forms voids over a height of at least 30% of the greatest height of the annular skirt. The void volume, devoid of material, is therefore substantial along the axial dimension, contributing to the reduction of the material volume of the lower support.

[0011] Preferably, in a cutting plane perpendicular to the reference axis and located midway between the lower and upper planes, two successive teeth are separated by a gap with an angular sector greater than or equal to 15°, preferably greater than or equal to 25°, measured around the reference axis. Even more preferably, two successive gaps are separated by a tooth with an angular sector strictly smaller than the angular sector of the gap, around the reference axis.

[0012] The presence of void space is therefore also significant along the circumferential dimension. The void volume without material is thus substantial in the circumferential direction, contributing to the reduction of the material volume of the lower support.

[0013] According to one embodiment, the distance DI is greater than or equal to 200% of a distance D3 separating two opposite radial faces of the annular skirt, preferably greater than or equal to 300% of the distance D3. As a result, the teeth have a thickness sufficient to resist any torsion of the helical spring, thus ensuring the centering or pre-centering of said spring around the reference axis.

[0014] According to one embodiment, the support comprises a number NI of teeth greater than or equal to 3, preferably equally distributed around the reference axis, preferably greater than or equal to 5, and less than or equal to 15, preferably less than or equal to 12. Thus the number of teeth is sufficient for good centering of the spring.

[0015] According to one embodiment, at least some of the teeth have a connection interface with a protective sleeve of a telescopic shock absorber of the suspension leg or with an annular filter ring intended to be interposed between the bearing surface and the upper coil of the helical spring of the suspension leg, for example: • one or more annular hooks projecting radially opposite the reference axis; and / or • one or more annular hooks projecting radially towards the reference axis; and / or • one or more hooks projecting orthoradially towards a neighboring tooth among the teeth.

[0016] According to one embodiment, the lower support is made of a single piece of metal or metal alloy, preferably a lightweight metal or a lightweight metal alloy, and even more preferably an aluminum or zinc alloy, enabling the lower support to withstand forces greater than those it could withstand if it were made of a plastic material. Furthermore, the invention is even more advantageous if the lower support is made of a metal or metal alloy denser than a plastic material, as the invention makes it possible to significantly reduce the weight of the lower support.

[0017] To enable its manufacture by molding in a simple axial mold, preferably without drawers, it is preferable that an inner perimeter of the lower support, including the lower edge, is formed without undercuts in the axial direction. The serrations are thus created by a mold core. Preferably, an outer perimeter of the lower support, complementary to the inner perimeter, is formed without undercuts in the axial direction or in a radial demolding direction. The outer perimeter can then be formed either with mold cavities that move axially in the reference direction, or with mold cavities that move in the demolding direction.

[0018] According to another aspect of the invention, a rotating suspension stop for a suspension leg, the rotating suspension stop being notable in that it comprises at least: • a lower support as described above, • a stop cover allowing the rotating suspension stop to be linked to a vehicle superstructure, • a plain or rolling bearing positioned between the lower support and the thrust cover, guiding a relative rotational movement between the thrust cover and the lower support around the reference axis of the lower support, • Optionally, an elastomer filter ring, either directly or indirectly supported against the bearing surface and configured to filter noise or vibrations between a helical spring and the lower support, • Optionally, a continuously annular deformable protective sleeve extending axially in a downward direction from the annular skirt, the protective sleeve being configured to protect a central volume that the protective sleeve delimits, the central volume being intended to accommodate at least part of a telescopic shock absorber.

[0019] The lower support thus provides its advantages, namely its reduction in weight and manufacturing costs, to the rotating suspension stop.

[0020] According to one embodiment, the filter ring is overmolded onto at least a portion of the annular bearing surface and at least a portion of the annular skirt of the lower support, thereby sealing the rotating suspension stop at the connection between the lower support and the filter ring. Furthermore, overmolding the filter ring onto the lower support improves the mechanical resistance of both parts to stresses exerted, for example, by the helical spring. Moreover, the overmolding ensures adhesion of the filter to the lower support, thus preventing the filter from migrating over time and pumping movements of the suspension. Overmolding also limits the operations involved in mounting the filtration system onto the lower support.

[0021] According to one embodiment, the filter ring covers at least part of each tooth of the annular skirt, preferably completely covering an outer annular face of the annular skirt, with the outer annular face facing away from the reference axis. The filter ring thus protects the teeth of the annular skirt from external stresses. Preferably, the filter ring completely covers the annular skirt of the lower support. The filter ring then protects the entire annular skirt from external stresses.

[0022] According to one embodiment, the filter ring radially seals the voids in the annular skirt. The ring thus forms a watertight connection with the lower support. Since the filter ring is generally made of plastic materials, the sealing of the voids will have little or no impact on the weight of the rotating suspension stop.

[0023] According to one embodiment, the filter ring has a connecting interface, for example a continuous or discontinuous annular hook, the connecting interface being configured to connect the protective sleeve directly or indirectly to the lower support. This embodiment is advantageous if the annular skirt does not have a connecting interface. The hooks are thus formed from the same material as the filter ring. Forming the connecting interface on the protective sleeve is simpler than on the lower support, as undercuts are easier to manage in the injection mold of the protective sleeve (the sleeve preferably being made of an elastomer) than in the mold of the metallic lower support.

[0024] According to one embodiment, the protective sleeve has, at an upper end of the protective sleeve, a connecting extension extending axially in an upward axial direction opposite to the downward axial direction, preferably the connecting extension has a complementary connecting interface intended to connect by complementary shape to the connecting interface formed by the lower support or the filter ring.

[0025] According to one embodiment, the connecting extension covers all or part of an outer annular face of the annular skirt; preferably, the connecting extension covers all or part of the annular support area; preferably, the connecting extension is interposed between at least part of the lower support and at least part of the filter ring; preferably, it is pinched between at least part of the lower support and at least part of the connecting extension. The protective sleeve is then partially pinched between the lower support and the ring. filtration, improving sleeve retention, sealing and mechanical resistance to the stresses generated by the spring, and reducing the complexity of shape and assembly since this connection does not require a hook (although these can still be complementary to this embodiment).

[0026] According to another aspect of the invention, a suspension leg comprises at least one rotating suspension stop as described above, a helical spring with an upper coil bearing directly or indirectly in a support plane perpendicular to the reference axis of the lower support, with an annular bearing surface, and, where applicable, a telescopic shock absorber housed in the central volume of the protective sleeve. Such a suspension leg thus benefits from all the aforementioned advantages. BRIEF DESCRIPTION OF THE FIGURES

[0027] Other features and advantages of the invention will become apparent from the following description, with reference to the attached figures.

[0028] [Fig.1] Fig.1 illustrates, in an axial cross-sectional view, a rotating suspension stop comprising a lower support according to a first embodiment.

[0029] [Fig.2] Fig.2 illustrates, in an isometric view, the lower support according to the first mode of implementation.

[0030] [Fig. 3] Figure 3 illustrates, in a cross-sectional view, the lower support seen from below according to the first embodiment.

[0031] [Fig.4] Fig.4 illustrates the rotating suspension stop comprising the support lower according to a second embodiment.

[0032] [Fig. 5] Fig. 5 illustrates, in a perspective view, the lower support, a filtration ring and a protective sleeve for the rotating suspension stop according to the second embodiment.

[0033] [Fig.6] Fig.6 illustrates, in a cross-sectional view, the rotating suspension stop including the lower support according to a third embodiment.

[0034] [Fig.7] Fig.7 illustrates, in a perspective view, the lower support, the ring filtration and the protective sleeve of the rotating suspension stop according to the third embodiment. DETAILED description of implementation methods

[0035] Figure 1 illustrates a rotating suspension stop 12 of a suspension strut 10 for a vehicle according to a first embodiment. The suspension strut 10 comprises a helical spring 14, a telescopic shock absorber 16, and the rotating suspension stop 12.

[0036] The rotating suspension stop 12 comprises a lower support 18, a bearing 20 supported by a seat 60 of the lower support 18, and a cover stop 22, intended to be fixed to a superstructure 24 of the vehicle, and forming with the lower support 18 a housing volume for the bearing 20. The bearing 20 allows a relative rotational movement between the lower support 18 and the stop cover 22.

[0037] Optionally, the rotating suspension stop 12 includes a filter ring 26 allowing a reduction of noise and vibration transmitted between a wheel of the vehicle and the superstructure 24 of the same vehicle via the helical spring 14. The rotating suspension stop 12 may also include a protective sleeve 28 allowing the telescopic shock absorber 16 to be protected against impurities from the external environment, the protective sleeve 28 being waterproof.

[0038] The lower support 18, shown alone in [Fig. 2] according to the invention, is a single piece. The lower support 18 is formed from a volume of material. The lower support 18 is annular, centered on a reference axis 100. The lower support 18 is made of a strong material capable of withstanding significant loads. To achieve this, the lower support 18 is made of a lightweight metallic material, preferably aluminum. Optionally, the lower support 18 may include or be made of another lightweight metal, for example zinc.

[0039] The lower support 18 has an annular collar 30. The annular collar 30 forms an annular bearing surface 32 in a downward axial direction SI for an upper coil of the helical spring 14. The upper coil of the helical spring 14 may bear directly or indirectly on the bearing surface 32 of the lower support 18. The annular bearing surface 32 is tangent to a bearing plane PI. The bearing plane PI is perpendicular to the reference axis 100.

[0040] The lower support 18 also includes an annular skirt 34. The annular skirt 34 projects axially from the annular bearing surface 32 in the downward axial direction SI. The annular skirt 34 also projects radially towards the reference axis 100 from the annular bearing surface 32. The annular skirt 34 allows for the correct axial positioning of the helical spring 14 in the suspension leg 10. The annular skirt 34 thus allows for the centering of the helical spring 14 around the reference axis 100.

[0041] The annular skirt 34 has a lower edge 36. The lower edge 36 of the annular skirt 34 is located axially opposite the annular support 32. The lower edge 36 has axial serrations. Since the lower edge 36 is annular, the axial serrations have an axial component and a circumferential component from the reference axis 100.

[0042] The lower edge 36, which is serrated, then presents an alternation of a number NI of teeth 38 and a number N2 of gaps 40, with N1=N2, and more particularly in this mode of realization, N1=N2=7. More generally, the lower edge 36 has a number NI of teeth 38 greater than or equal to 3, preferably greater than or equal to 5, and less than or equal to 15, preferably less than or equal to 12.

[0043] Each tooth 38 is axially projecting. Each gap 40 separates the teeth 38 in pairs. The annular skirt 34 then has a height, measured between the lower edge 36 and the support plane PI, that varies according to the angular sector. The lower edge 36 is tangent to an upper plane P2, perpendicular to the reference axis 100, in an angular sector with a gap 40. The lower edge 36 is tangent to a lower plane P3, perpendicular to the reference axis 100, in an angular sector with a tooth 38. The lower edge 36 lies between the lower plane P3 and the upper plane P2.

[0044] The lower edge 36 is crenellated so as to lighten the lower support 18. The axial crenellation of the lower edge 36 must therefore be substantial, both in terms of the axial component and the circumferential component.

[0045] To achieve this, the lower plane P3 is located at a distance DI from the upper plane P2 and at a distance D2 from the support plane PI, such that ΔL = 0.56 in this embodiment, with D1 = 14 mm and D2 = 25 mm. More generally, ΔL > 0.3, and preferably ΔL > 0.5. In other words, the serration is performed axially over at least y4 of a height of the annular skirt 34 measured between the support plane PI and the lower edge 36 in an angular sector having a tooth 38.

[0046] Also, with reference to [Fig. 3], in a cutting plane P4 perpendicular to the reference axis 100 and located midway between the lower plane P3 and the upper plane P2, two successive teeth 38 are separated by a gap 40 with an angular sector A1 greater than or equal to 15°, preferably greater than or equal to 25°, measured around the reference axis 100. Furthermore, still in this same cutting plane P4, two successive gaps 40 are separated by a tooth 38 by an angular sector A2 strictly less than the angular sector of the gap 40, around the reference axis 100. In other words, the set of gaps 40 occupies an angular sector greater than that of the set of teeth 38.

[0047] The annular skirt 34 also has an outer annular face 42. The outer annular face 42 locally forms an inner perimeter of the lower support 18. The outer annular face 42 is oriented in a direction opposite to the reference axis 100. The outer annular face 42 is frustoconical. The outer annular face 42 has, at the level of the support plane PI, a cross-section with a diameter greater than that of a cross-section at the level of the upper plane P2.

[0048] On the other hand, the annular skirt 34 has an inner annular face 44. The inner annular face 44 locally forms an inner perimeter of the lower support 18. The inner annular face 44 has a draft angle, here of 0.5°.

[0049] The inner annular face 44 and the outer annular face 42 are thus separated by a distance D3 that varies axially. In the cutting plane P4, the distance D3 is 2.8 mm. The teeth 38 therefore have a significant thickness to maintain the robustness necessary for centering the helical spring 14, and to withstand any forces that said spring may generate. Generally, DI is greater than or equal to 200% of the distance D3, preferably greater than or equal to 300% of the distance D3.

[0050] The lower support 18, comprising such inner surface 44 and outer surface 42, does not have undercuts in the axial direction or in the radial direction, and can therefore be manufactured with molding tools of simple and less expensive design.

[0051] Thanks to all the aforementioned characteristics, the teeth 38 allow the annular skirt 34 to be extended axially so as to ensure the centering of the helical spring 14 around the reference axis lOOwhile the voids 40 reduce the volume of material forming the lower support 18 so as to lighten said lower support 18.

[0052] More particularly, one can compare the volume of material and a theoretical volume corresponding to the sum of a volume of an upper part of the lower support 18 and a volume of an envelope of a lower part.

[0053] The volume of the upper part of the lower support 18 is the volume of the lower support 18 above the upper plane P2. This volume is not affected by the invention.

[0054] The envelope is radially delimited by the outer annular face 42 of the annular skirt 34 and the inner annular face 44 of the annular skirt 34. The envelope is also axially delimited by the lower plane P3 and the upper plane P2.

[0055] The lower support 18 has a material volume less than at least 96% of the theoretical volume, preferably less than 92% of the theoretical volume.

[0056] This decrease in the volume of material forming the lower support 18 results, in addition to a lightening of the lower support 18, in cost reductions during production, linked in particular to the gain in material.

[0057] As mentioned above, the rotating suspension stop 12 may include a filter ring 26. The rotating suspension stop 12 may also include a protective sleeve 28. In the first embodiment, the rotating suspension stop 12 includes these two elements 26, 28.

[0058] The filter ring 26 is made of a material that absorbs noise and vibrations in the audible frequency range, so as to limit their propagation through the suspension leg 10. The filter ring 26 is also configured to distribute the compressive stresses of the helical spring 14 onto the lower support 18, thus avoiding localized contact. The filter ring 26 covers, preferably by overmolding, a portion of the annular bearing surface 32 and the entire annular skirt 34, namely the inner annular face 44 and the outer annular face 42. The filter ring 26 has a constant angular height, extending from the bearing plane PI to the lower plane P3, so as to cover the lower edge 36. The filter ring 26 also radially seals the voids 40 in the annular skirt 34.According to one embodiment variant, all or part of the periphery of a tooth 38 may remain uncovered, for example at the level of the inner annular face 44, to allow angular indexing.

[0059] The filter ring 26 has a radially variable thickness between the upper plane P2 and the lower plane P3. The thickness between the upper plane P2 and the lower plane P3 is a function of the angular sector. More specifically, the filter ring 26 has a greater thickness with respect to the voids 40 of the skirt than with respect to the teeth 38. In this way, the filter ring 26 has a predetermined rigidity necessary to maintain its annular shape.

[0060] In the vicinity of the lower plane P3, the filter ring 26 has a connecting interface 46. The connecting interface 46 is configured to connect the protective sleeve 28 to the rotating suspension stop 12. The connecting interface 46 includes a hook 48. The hook 48 is annular. The hook 48 is rotated radially outwards from the annular skirt 34. The hook 48 protrudes radially outwards from the annular skirt 34.

[0061] The protective sleeve 28 comprises a long portion 50 extending axially along the telescopic shock absorber 16. More specifically, the long portion 50 of the protective sleeve 28 extends axially in the downward axial direction SI from the lower plane P3 to a shock absorber body 16 in which a piston moves. In this way, the long portion 50 of the protective sleeve 28 protects the sliding connection between the piston and the shock absorber body 16.

[0062] The protective sleeve 28 also includes a connecting extension 52. The connecting extension 52 is annular. The connecting extension 52 extends in an upward axial direction, opposite to the downward axial direction, from the lower plane P3. The connecting extension 52 includes a complementary connecting interface 54. The complementary connecting interface 54 is configured to correspond by complementary shape to the connecting interface 46 presented by the filter ring 26. In other words, the connecting extension 52 includes, at at the level of its complementary link interface 54, a corresponding complementary hook 56 configured to link to the hook 48 of the link interface 46 of the filtration ring 26.

[0063] The connecting extension 52 of the protective sleeve 28 also includes an axial extension 58 extending in the upward axial direction from the complementary connecting interface 54. The axial extension 58 is preferably fitted annularly around the filter ring 26. In this way, the connection between the protective sleeve 28 and the filter ring 26 is improved, and the sealing protection is increased.

[0064] Figures 4 and 5 illustrate a second embodiment. The second embodiment differs from the first in that the filter ring 26 covers only an annular portion of the outer annular face 42 of the annular skirt 34. In this embodiment, the connection between the protective sleeve 28 and the rotating suspension stop 12 is ensured by the lower support 18. The lower support 18 then presents, in the vicinity of the lower plane P3, that is to say at a distal end of the teeth 38 of the annular skirt 34, the connecting interface 46. The connecting interface 46 then presents a discontinuous annular hook 48. The axial extension 58 of the connecting extension 52 of the protective sleeve 28 allows the voids 40 of the annular skirt 34 to be blocked. The axial extension 58 is then adjusted to the portion of the annular skirt 34, which it covers.The filter ring 26 is then attached to all or part of the annular support surface 32 and to part of the axial extension 58. The axial extension 58 is thus pinched between the annular skirt 34 and the filter ring 26, ensuring optimal sealing and secure retention.

[0065] Figures 6 and 7 illustrate a third embodiment. The third embodiment differs from the second embodiment in that the connecting interface 46 and the complementary connecting interface 54 do not have hooks 48. The axial extension 58 of the connecting extension 52 then extends to the bearing surface 32 of the lower support 18 and covers a portion of the bearing surface 32. The filter ring 26 is attached to the axial extension 58 so as to connect the protective sleeve 28 to the rotating suspension stop 12 by clamping or compression.

[0066] The lower support 18 made of light metal alloy is configured to withstand significant forces and to limit deformation under load, with a relatively low mass.

[0067] Naturally, the examples shown in the figures and discussed above are given only by way of illustration and are not intended to be limiting. It is explicitly intended that one can combine the different illustrated methods of implementation to propose others.

Claims

Demands

1. Annular lower support (18) for a rotating suspension stop (12) of a suspension leg, the lower support (18) having a volume of material and forming an annular bearing surface (32) centered on a reference axis (100) and rotated axially in a downward axial direction to bear directly or indirectly, in a bearing plane (PI) perpendicular to the reference axis (100), against an upper coil of a helical spring (14) of the suspension leg (10), and an annular skirt (34) projecting axially from the annular bearing surface (32) in the downward axial direction, the annular skirt (34) comprising a lower edge (36) having axial serrations forming an annular alternation of axially projecting teeth (38) and gaps (40) separating the teeth (38) two by two,the lower edge (36) having at least one point of intersection with an upper plane (P2) perpendicular to the reference axis (100) and at least one point of intersection with a lower plane (P3) perpendicular to the reference axis (100), such that the lower edge (36) is entirely located between the lower plane (P3) and the upper plane (P2), the lower support (18) being characterized in that a lower portion of the lower support (18), located between the upper plane (P2) and the lower plane (P3), is located entirely within an envelope having rotational symmetry about the reference axis (100), and the volume of material of the lower support (18) is less than 96%, preferably 92%, of a volume obtained by adding the volume of an upper portion of the lower support (18) located above the upper plane (P2), and the volume of the envelope.

2. Lower support (18) according to claim 1, characterized in that the lower plane (P3) is located at a distance DI from the upper plane (P2) and at a distance D2 from the support plane (PI), such that >0.3, and preferably >0.

5.

3. Lower support (18) according to claim 1 or 2, characterized in that in a cutting plane (P4) perpendicular to the reference axis (100) and located midway between the lower plane (P3) and the upper plane (P2), - two successive teeth (38) are separated by a gap (40) of angular sector (Al) greater than or equal to 15°, preferably greater than or equal to 25°, measured around the reference axis (100); and / or - two successive gaps (40) are separated by a tooth (38) of an angular sector (A2) strictly less than the angular sector of the gap (40), around the reference axis (100); and / or - the distance DI is greater than or equal to 200% of a distance D3 separating two opposite radial faces of the annular skirt (34), preferably greater than or equal to 300% of the distance D3.

4. Lower support (18) according to any one of claims 1 to 3, characterized in that it comprises a number NI of teeth (38) greater than or equal to 3, preferably equally distributed around the reference axis (100), preferably greater than or equal to 5, and less than or equal to 15, preferably less than or equal to 12.

5. Lower support (18) according to any one of claims 1 to 4, characterized in that at least some of the teeth (38) have a connection interface (46) with a protective sleeve (28) of a telescopic shock absorber (16) of the suspension leg (10) or with an annular filter ring (26) intended to be interposed between the bearing surface (32) and the upper coil of the helical spring (14) of the suspension leg (10), for example: - one or more annular hooks (48) projecting radially opposite the reference axis (100); and / or - one or more annular hooks (48) projecting radially towards the reference axis (100); and / or - one or more hooks (48) projecting orthoradially towards a neighboring tooth (38) among the teeth (38).

6. Lower support (18) according to any one of the preceding claims, characterized in that it is made of a single piece of metal or metal alloy, preferably a light metal or an alloy of light metals, preferably further made of an alloy of aluminum or zinc.

7. Lower support (18) according to any one of the preceding claims, characterized in that an inner periphery of the support lower (18), including the lower edge (36), is made without undercut in the axial direction.

8. Lower support (18) according to any one of the preceding claims, characterized in that an outer perimeter of the lower support (18), complementary to the inner perimeter, is made without undercut in the axial direction or in a radial demolding direction.

9. A rotating suspension stop (12) for a suspension strut (10), the rotating suspension stop (12) being characterized in that it comprises at least: - a lower support (18) according to any one of the preceding claims, - a stop cover (22) for connecting the rotating suspension stop (12) to a vehicle superstructure (24), - a plain or rolling bearing (20) positioned between the lower support (18) and the stop cover (22), guiding a relative rotational movement between the stop cover (22) and the lower support (18) about the reference axis (100) of the lower support (18), - optionally, an elastomer filter ring (26) bearing directly or indirectly against the bearing surface (32) and configured to filter noise or vibration between a helical spring (14) and the lower support (18), - optionally,a continuously deformable annular protective sleeve (28) extending axially in a downward direction (SI) from the annular skirt (34), the protective sleeve (28) being configured to protect a central volume that the protective sleeve (28) delimits, the central volume being intended to accommodate at least part of a telescopic shock absorber (16).

10. Rotating suspension stop (12) according to claim 9, characterized in that the filter ring (26) is overmolded on at least part of the annular bearing surface (32) and at least part of the annular skirt (34) of the lower support (18).

11. Rotating suspension stop (12) according to claim 9 or 10, characterized in that the filter ring (26) covers at least part of each tooth (38) of the annular skirt (34), preferably fully covers an outer annular face (42) of the annular skirt (34), the outer annular face (42) being turned in the opposite direction to the reference axis (100).

12. Rotating suspension stop (12) according to any one of claims 9 to 11, characterized in that the filter ring (26) radially obstructs the voids (40) of the annular skirt (34).

13. Rotating suspension stop (12) according to any one of claims 9 to 12, characterized in that the filter ring (26) has a linking interface (46), for example a continuous or discontinuous annular hook (48), the linking interface (46) being configured to link directly or indirectly the protective sleeve (28) to the lower support (18).

14. Rotating suspension stop (12) according to any one of claims 9 to 13, characterized in that the protective sleeve (28) has, at an upper end of the protective sleeve (28), a connecting extension (52) extending axially in an upward axial direction opposite to the downward axial direction (SI).

15. Rotating suspension stop (12) according to claim 14, in combination with claim 5 or 13, characterized in that the linking extension (52) has a complementary linking interface (54) intended to link by complementary form to the linking interface (46).

16. Rotating suspension stop (12) according to claim 14 or 15, characterized in that - the connecting extension (52) covers all or part of an outer annular face (42) of the annular skirt (34); and / or - the connecting extension (52) covers all or part of the annular bearing surface (32); and / or - the connecting extension (52) is interposed between at least a part of the lower support and at least a part of the filter ring (26), preferably is pinched between at least a part of the lower support (18) and at least a part of the connecting extension (52).

17. Suspension leg (10) characterized in that it comprises at least one rotating suspension stop (12) according to any one of claims 9 to 16, a helical spring (14) of which an upper coil is in direct or indirect support, in a support plane (PI) perpendicular to the reference axis (100) of the lower support (18), with the annular support area (32), and, where applicable, a telescopic shock absorber (16) housed in the central volume of the protective sleeve (28).

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