Shock-absorbing assembly with radial projection

Abstract

A damping assembly is provided comprising a base comprising a circular opening and a support (200) configured to fit into said circular opening of said base. The support (200) comprises a base (210) having a cylindrical outer side surface. The support (200) comprises a damping cylinder (220) comprising an inner side surface surrounding the outer side surface of said base (210) and an outer side surface (222) configured to hold on said circular opening. Said damping cylinder (220) comprises at least one radial projection (230) extending from the inner side surface of said damping cylinder (220) or from the outer side surface of said damping cylinder (220). [Fig. 4]

Description

Title of the invention: Damping assembly with radial projection Technical field

[0001] The present disclosure relates to the field of shock absorber assemblies, for example shock absorber assemblies for vehicles (for example cars or trucks). Technical background

[0002] Damping assemblies can be used to absorb and / or dampen vibrations and / or shocks between mechanical parts forming part of the same assembly. Such damping assemblies can in particular be used in the automotive sector to connect different mechanical parts of a vehicle.

[0003] Such damping assemblies may in particular each consist of a base comprising a circular opening and a support configured to be inserted into the circular opening of the base. The support is generally configured to serve as a support for a mechanical part, the latter then being mechanically connected to the base via the support. The support generally comprises a damping part making it possible to absorb and / or dampen vibrations and / or shocks between the base and the mechanical part resting on the support.

[0004] [Fig. 1] shows an example of such a damping assembly support 100. The support 100 comprises a base 110 having a rod 112 having a cylindrical outer lateral surface and a shoulder 114 disposed at one end of said rod 112. The support 100 also comprises a damping cylinder 120 comprising an inner lateral surface surrounding the outer lateral surface of said rod 112 and an outer lateral surface 122 configured to be held on the circular opening of the base. [Fig. 2] shows the insertion of the support 100 of [Fig. 1] on the base 130, and in particular the holding of the outer lateral surface 122 of the damping cylinder 120 on the circular opening 131 of the base 130 by inserting the edge of the circular opening 131 into a circumferential groove formed on the periphery of the damping cylinder 120.

[0005] The damping cylinder serves to absorb and / or dampen vibrations and / or shocks between the mechanical part resting on the support and the base. The damping provided by such an assembly can in particular be measured by a radial curve representing a force applied as a function of the radial displacement of the support (or of the mechanical part resting on it) relative to the base, i.e. perpendicular to the axis of the damping cylinder.

[0006] [Fig.3] shows an example of such a radial curve measured for examples of the damping assembly illustrated in [Fig.l] and [Fig.2]. In particular, [Fig.3] shows the radial curve 141 measured for a first example of a damping assembly in which the clamping between the support and the base is minimal, and the radial curve 142 measured for a second example of a damping assembly in which the clamping between the support and the base is maximal. In each of these examples, the clamping between the support and the base results from the dimensional variations induced by the manufacturing tolerances of the parts of the assembly. These variations result in a more or less strong clamping between the support and the base.

[0007] A limitation of current damping assemblies is that the damping can deteriorate depending on this tightening when the support is centered on the circular opening. This deterioration is notably caused by the presence of a clearance between the support and the base resulting from the manufacturing tolerances of the parts of the assembly, and leading to a reduction in rigidity at the origin. This is reflected on the radial curve by an accelerated reduction in rigidity around the origin. In particular, the example in [Fig. 3] shows the reduction in rigidity at the origin for the radial curve measured for the second example. This reduction in rigidity degrades the vibration and / or shock absorption qualities of the damping assembly.

[0008] There is therefore a need for an improved damping assembly. Abstract

[0009] For this purpose, a damping assembly is proposed comprising a base comprising a circular opening and a support configured to be inserted into said circular opening of said base. The support comprises a base having a cylindrical outer lateral surface. The support comprises a damping cylinder comprising an inner lateral surface surrounding the outer lateral surface of said base and an outer lateral surface configured to be held on said circular opening. Said damping cylinder comprises at least one radial projection protruding from the inner lateral surface of said damping cylinder or from the outer lateral surface of said damping cylinder.

[0010] The assembly may comprise a circular spacing between said base and said circular opening when the support is inserted into said circular opening. Said at least one radial projection may have a radial thickness greater than that of said circular spacing.

[0011] The thickness of said at least one radial projection may be greater than the result of adding the manufacturing tolerance of the base or the base and the manufacturing tolerance of the damping cylinder.

[0012] Said damping cylinder may comprise a single radial projection. Said single radial projection may be positioned longitudinally substantially in the center of said base.

[0013] Said damping cylinder may comprise a plurality of radial projections. Said radial projections may be distributed longitudinally along said base.

[0014] Both ends of said damping cylinder may comprise a respective shoulder forming a circumferential groove around said cylinder. Said circular opening may comprise a circular edge. Said damping cylinder may be held on said circular opening by inserting said circular edge of said circular opening into said circumferential groove.

[0015] Said damping cylinder may be made of elastomeric material.

[0016] Said at least one radial projection may extend over all or part of the circumference of said damping cylinder.

[0017] A support belonging to such an assembly is also proposed, in which said at least one radial projection protrudes from the outer lateral surface of said cylinder.

[0018] A support belonging to such an assembly is also provided, in which said at least one radial projection protrudes from the inner lateral surface of said cylinder.

[0019] A method of manufacturing a support belonging to such an assembly is also proposed, in which said at least one radial projection protrudes from the outer lateral surface of said cylinder.

[0020] A method of manufacturing a support belonging to such an assembly is also proposed, in which said at least one radial projection protrudes from the inner lateral surface of said cylinder. Brief description of the figures

[0021] Non-limiting examples will be described with reference to the following figures:

[0022] [Fig.l] and [Fig.2] illustrate an example of an existing damping assembly.

[0023] [Fig.3] shows an example of a measured radial curve for examples of the existing damping assembly illustrated in [Fig.l] and [Fig.2].

[0024] [Fig.4], [Fig.5], [Fig.6] and [Fig.7] illustrate an example of support.

[0025] [Fig.8] illustrates the radial projection of the example support of Figures 4 to 7.

[0026] [Fig.9] shows the measured radial curve for an assembly comprising the example supporting figures 4 to 7.

[0027] [Fig. 10] and [Fig.1 1] illustrate an example of a damping assembly.

[0028] [Fig. 12] shows examples of radial curves measured for damping assemblies like that of [Fig. 10].

[0029] [Fig. 13] shows another example of a damping assembly.

[0030] [Fig. 14] shows the radial projection of the example support of [Fig. 13]. Detailed description

[0031] A damping assembly is provided comprising a base comprising a circular opening and a support configured to fit into said circular opening. said base. The support comprises a base having a cylindrical outer lateral surface. The support comprises a damping cylinder comprising an inner lateral surface surrounding the outer lateral surface of said base and an outer lateral surface configured to hold over said circular opening. Said damping cylinder comprises at least one radial projection extending from the inner lateral surface of said damping cylinder or the outer lateral surface of said damping cylinder.

[0032] This constitutes an improved damping assembly.

[0033] Indeed, the at least one radial projection fills the gap between the support and the base, which prevents degradation of the damping around the origin. In particular, the at least one radial projection makes it possible to prevent this degradation without significantly modifying the operation of the damping assembly. The damping assembly therefore provides equivalent damping but without degradation around the origin.

[0034] In particular, the radially projecting shape is particularly suitable for overcoming the shape variations induced by the manufacturing tolerances of the support and the base. Indeed, it allows for more or less strong crushing in the clearance between the support and the base to compensate for these dimensional variations. The proposed damping assembly therefore provides adequate damping independently of these dimensional variations.

[0035] Furthermore, the damping assembly is particularly easy to manufacture. Indeed, by compensating for the manufacturing tolerances, the presence of the at least one radial projection allows the damping assembly to be manufactured without it being necessary to excessively reduce and / or control these manufacturing tolerances, which simplifies the manufacturing process. Furthermore, the manufacture of a damping cylinder comprising such at least one radial projection is not difficult to carry out, which contributes to improving the ease of manufacturing of the damping assembly.

[0036] The damping assembly may be used in a vehicle. In this case, the base (also called a "housing") may be a structural part of the vehicle, i.e., a part that is part of the structure of the vehicle, and which may have a significant dimension in the vehicle. For example, the base may be part of the chassis of the vehicle or of the engine. The support may serve as a support for a part that, via this support, is held on the base, i.e., a part that is smaller and / or lighter than the base. For example, the support may serve as a support for a radiator, or any other part that must be held on a base at a circular opening. The damping assembly is configured to provide support between the base and this part that is held on the base.The damping assembly is notably configured to dampen vibrations and shocks between the base and this part resting on the support and which is held on the . base.

[0037] The damping assembly may be formed along a main axis. For example, the bracket (also called "inner frame") may have the shape of a rod comprising a central cylindrical hole. The damping cylinder and the base may be along the same axis (said main axis). The circular opening of the base may be, when the support is inserted into the circular opening, oriented perpendicular to this axis of the rod formed by the base and the damping cylinder, and may be centered on this axis.

[0038] The circular opening of the base may be perfectly circular, that is to say it may comprise an edge whose section in a plane perpendicular to the axis of the damping assembly is a circle. Alternatively, the opening of the base may be substantially circular, for example oval. In this case, the circular opening of the base may comprise an edge whose section in a plane perpendicular to the axis of the damping assembly is oval or elliptical.

[0039] The base can be inserted into the circular opening when the support is inserted into the circular opening, that is to say that the two ends of the base can be located on either side of the circular opening when the support is inserted into the circular opening.

[0040] The base can serve as a support for a mechanical part (such as a radiator) without the latter coming into contact with the base. Such a mechanical part can comprise a rod configured to be inserted into the central cylindrical hole of the base. The support of the mechanical part can result from the contact of the latter with the base when the rod of the mechanical part is inserted into the central cylindrical hole, said contact blocking the movement of the mechanical part in the directions perpendicular to the axis of the support and / or in the direction of the axis of the support.

[0041] When the support is inserted into the circular opening of the base, the damping cylinder is located between the base and the circular opening. In particular, the damping cylinder comprises an inner lateral surface surrounding the outer lateral surface of the base and an outer lateral surface configured to hold on said circular opening. The damping cylinder is thus configured to dampen vibrations and / or shocks between the base and the base serving as support for the part.

[0042] The damping cylinder may be made of elastomeric material, that is, it may be made entirely or partially of an elastomer. For example, the damping cylinder may be made of elastomer (silicone or rubber or TPE).

[0043] The base may be made of metallic or plastic material. For example, the base may be made of aluminum. Similarly, the base may be made of metallic (e.g., aluminum) or plastic material.

[0044] In examples, the assembly may include a circular spacing between the base and the circular opening when the support is inserted into the circular opening. The circular gap may be a clearance between the base, the damping cylinder and the base when the support is inserted into the circular opening, which may be induced by the manufacturing tolerances of the various parts of the damping assembly (base, damping cylinder and / or base).

[0045] According to a first option, this circular spacing may be between the damping cylinder and the circular opening, i.e. between the outer lateral surface of the damping cylinder and the edge of the circular opening. For example, the outer lateral surface of the cylinder may have a diameter smaller than the diameter of the edge of the circular opening. In this first option, the at least one radial projection may protrude from the outer lateral surface of said damping cylinder, towards the outside of the damping cylinder. The at least one radial projection may thus fill this circular spacing in the assembly, which is located between the damping cylinder and the circular opening of the base.

[0046] In this first option, there may be no clearance between the base and the damping cylinder. The inner lateral surface of the damping cylinder may be in contact with the cylindrical outer lateral surface of the base. For example, the damping cylinder may have been molded onto the base of the support (on its cylindrical outer lateral surface), with or without adhesion. The adhesion may ensure contact between the damping cylinder and the base.

[0047] According to a second option, the circular spacing may be between the base and the damping cylinder, i.e. between the inner lateral surface of the damping cylinder and an outer lateral surface of the base. For example, the inner lateral surface of the damping cylinder may have a diameter greater than the diameter of the cylindrical outer lateral surface of the base. In this second option, the at least one radial projection may protrude from the inner lateral surface of said damping cylinder, towards the inside of the damping cylinder. The at least one radial projection may thus fill this circular spacing in the assembly, which is located between the base and the damping cylinder.

[0048] In this second option, there may be no clearance between the damping cylinder and the circular opening of the base. The outer lateral surface of the damping cylinder may be in contact with the edge of the circular opening. The damping cylinder may have been molded, with or without reinforcement. For example, the damping cylinder may have an outer diameter slightly larger than that of the circular opening so that it is compressed into the circular opening when the support is inserted into the base. The damping cylinder may thus be force-fitted onto the circular opening. Alternatively, the damping cylinder may have been molded directly onto the circular opening of the base, with or without adhesion. The adhesion may ensure contact between the damping cylinder and the circular opening in the base.

[0049] In a third option, which is a combination of the first two, the assembly may comprise a first circular spacing between the damping cylinder and the circular opening and a second circular spacing between the base and the damping cylinder. In this case, the damping cylinder may comprise at least a first radial projection extending from the inner lateral surface of the damping cylinder (as in the first option) and at least a second radial projection extending from the outer lateral surface of said damping cylinder (as in the second option).

[0050] In examples, in the first and second options, the damping cylinder may include a single radial projection. This radial projection may be positioned longitudinally substantially at the center of the base. In the third option, the damping cylinder may similarly include a single radial projection at each of the two circular spacings.

[0051] In other examples, in the first and second options, the damping cylinder may comprise a plurality of radial projections. These radial projections may be distributed longitudinally along the base. For example, the damping cylinder may comprise a first radial projection in the center, and two additional radial projections located longitudinally respectively above and below this first radial projection. In the third option, the damping cylinder may similarly comprise a plurality of radial projections at each of the two circular spacings.

[0052] A radial projection is now discussed in more detail. These details apply to the radial projection of the damping cylinder when the latter comprises only one, or to each of the radial projections when the damping cylinder comprises several.

[0053] The radial projection projects from the inner lateral surface of the damping cylinder or from the outer lateral surface of the damping cylinder. The radial projection may have the general shape of a hump. The radial projection may have a cross-section of any shape. For example, in a section along a longitudinal plane, the radial projection may have a cross-section of the general shape of a semicircle, a square, or a triangle. The radial projection may also include rounded edges at the junctions with the lateral surface from which the radial projection emerges. In such a section along a longitudinal plane, the cross-section of the radial projection may vary along the circumference of the damping cylinder (e.g., in thickness or shape). Alternatively, the cross-section of the radial projection may be constant over the entire circumference.

[0054] The radial projection runs along all or part of the circumference of the lateral surface from which the radial projection emerges. The radial projection may extend over a part of the circumference cushioning cylinder conference. For example, the radial projection may extend over at least 1% of the circumference, or at least 2%, for example at least 50 or 80%. Within this percentage of the circumference, the radial projection may be continuous or discontinuous. Alternatively, the radial projection may extend over the entire circumference of the cushioning cylinder. In this case, the radial projection may be continuous over the entire circumference of the cushioning cylinder.

[0055] The radial projection may have a radial thickness greater than that of the cylindrical gap that it fills in the assembly. The radial thickness is that in the direction that is normal to the lateral surface from which the radial projection emerges. Such a radial thickness makes it possible to ensure the compression of the radial projection when the support is inserted into the opening, which ensures the improvement of the rigidity at the origin. For example, in the case of the first option, the thickness of the radial projection may be greater than the result of the addition of the manufacturing tolerance of the base (for example that of the circular opening of the base) and the manufacturing tolerance of the damping cylinder (for example that of the diameter of the outer lateral surface of the damping cylinder).For example, the radial projection may have a radial thickness equal to the result of this addition of the tolerances to which a predetermined dimension is added (for example, equal to an average of these tolerances). In the case of the second option, the thickness of the radial projection may be greater than the result of the addition of the manufacturing tolerance of the base (for example, that of the outside diameter of the base) and the manufacturing tolerance of the damping cylinder (for example, that of the diameter of the inner lateral surface of the damping cylinder). For example, the radial projection may have a radial thickness equal to the result of this addition of the tolerances to which a predetermined dimension is added (for example, equal to an average of these tolerances). In both options, the radial thickness of the radial projection may also be less than twice the circular spacing.

[0056] In the third option, the thickness of the at least one first radial projection protruding from the outer lateral surface of the damping cylinder may be the same as according to the first option, and that of the at least one second radial projection protruding from the inner lateral surface of the damping cylinder may be the same as according to the second option.

[0057] The width of the radial projection (in the direction of the support axis) may be less than the height of the damping cylinder. For example, the width of the radial projection may be less than 50% of the height of the damping cylinder and / or greater than 1% of the height of the damping cylinder (for example, the width may be between 2 and 15% of the height of the damping cylinder). The width of the radial projection may be equal to twice its thickness.

[0058] The damping cylinder may be held on the circular opening of the base in any manner. In examples, the damping cylinder may be held on the circular opening of the base by force-fitting the damping cylinder onto the circular opening. For example, the two ends of said damping cylinder may comprise a respective shoulder each forming a respective circumferential lip around said cylinder, the two lips forming a circumferential groove between them. The circular opening may comprise a circular edge. The damping cylinder may be held on the circular opening by inserting the circular edge of the circular opening into the two circumferential lips formed by the shoulders of the damping cylinder.

[0059] A support according to the first option is also provided, i.e. in which the at least one radial projection projects from the outer lateral surface of the damping cylinder. Such a support may comprise any one or any combination of the features described above relating to the damping assembly.

[0060] A method of manufacturing a support according to the first option is also proposed, that is to say in which the at least one radial projection protrudes from the outer lateral surface of the damping cylinder. The manufacturing method comprises manufacturing the support with the damping cylinder comprising the at least one radial projection. For example, the method may comprise manufacturing the base, then molding the damping cylinder on the manufactured base. The molding may in particular be carried out on the base, on its cylindrical outer lateral surface. The molding of the damping cylinder on the base may be a molding carried out with or without adhesion. The manufacturing method may then comprise inserting the manufactured support into the circular opening of the base. The manufacturing method may or may not include the manufacturing of this base (for example before or after the manufacturing of the support).

[0061] A support according to the second option is also provided, i.e. in which the at least one radial projection projects from the inner lateral surface of the damping cylinder. Such a support may comprise any one or any combination of the features described above relating to the damping assembly.

[0062] A method of manufacturing a support according to the second option is also provided, i.e. in which the at least one radial projection protrudes from the inner lateral surface of the damping cylinder. The manufacturing method comprises manufacturing the support with the damping cylinder comprising the at least one radial projection. The manufacturing method may then comprise inserting the manufactured support into the circular opening of the base. The manufacturing method may or may not include manufacturing this base (e.g. before or after manufacturing the support).

[0063] Examples of damping assemblies will now be described with reference to Figures 4 to 14. In these examples, the damping assemblies may be used in a vehicle, for example to support a radiator.

[0064] [Fig.4] and [Fig.5] illustrate an example of a support 200. This example is for a damping assembly according to the first of the options discussed above. The support 200 comprises a base 210 having the shape of a rod with a cylindrical outer side surface.

[0065] The base 210 also comprises a central cylindrical hole 216 centered on the axis of the support 200. The central cylindrical hole 216 passes through the middle of the base 210. The base 210 can serve as a support for a mechanical part, such as a radiator. Such a mechanical part can comprise a rod configured to be inserted into the central cylindrical hole 216 of the base 210. The support of the mechanical part can result from the contact of the latter with the base 210 when the rod of the mechanical part is inserted into the central cylindrical hole 216, said contact blocking the movement of the mechanical part in the directions perpendicular and the direction normal to the axis of the support 217.

[0066] The support 200 also includes the damping cylinder 220. The damping cylinder 220 includes an inner side surface surrounding the outer side surface of the base 210 and an outer side surface 222. The damping cylinder 220 includes in its middle a central cylinder 212 into which the base can be pressed. The inner side surface surrounding the outer side surface of the base 210 is formed in this central cylinder.

[0067] The outer lateral surface 222 is configured to, when the support 200 is inserted into a base, hold the support 200 on the base. In particular, the outer lateral surface 222 is configured to hold itself on the circular opening of the base. In this example, the two ends of said damping cylinder comprise a respective shoulder 224, 225 forming a circumferential groove 226 around the cylinder. The damping cylinder 220 is held on the circular opening of the base by inserting the circular edge of the circular opening into this circumferential groove 226 formed by the shoulders 224, 225.

[0068] The damping cylinder 220 also comprises a radial projection 230, which is unique in this example, and which projects from the outer lateral surface 222 of the damping cylinder 220. The radial projection 230 is, when the support 200 is inserted into the circular opening of the base, compressed into the circular gap between the outer lateral surface 222 of the damping cylinder and the circular edge (or inner wall) of the base. The radial projection 230 runs around the circumference of the outer lateral surface 222. The radial projection 230 is positioned longitudinally, i.e. along the axis 217 of the support, substantially at the center of the base 210 and the damping cylinder. The radial projection 230 is positioned longitudinally at the center of the circumferential groove 226 formed by the shoulders 224, 225.

[0069] [Fig.6] shows a schematic view of the support 200 illustrated in [Fig.4] and [Fig.5], and [Fig.7] a view along section AA of this support 200.

[0070] The radial projection 230 is now discussed in more detail with reference to [Fig. 8]. In this example, the radial projection 230 has a generally semicircular cross-section. The radial projection 230 also includes rounded edges 232, 233 at the junctions with the outer lateral surface 222 of the damping cylinder. The cross-section of the radial projection 230 is constant over the entire circumference of the outer lateral surface 222. The radial projection 230 has a thickness 234 greater than the result of adding the manufacturing tolerance of the base 210 (0.2 millimeters in this example) and the manufacturing tolerance of the damping cylinder 220 (0.2 millimeters in this example). The radial projection 230 has, for example, a thickness 234 equal to 0.5 millimeters or 0.6 millimeters.

[0071] [Fig. 9] shows the radial curve measured for an assembly comprising the example support illustrated in Figures 4 to 7. It can be seen that, by filling the gap between the support and the base, the radial projection prevents the degradation of the damping around the origin. Indeed, the stiffness remains constant at the origin in both loading directions (the slope of the curve does not vary significantly near the origin). In particular, the radial projection allows this stiffness to be maintained without significant modification of the overall stiffness of the damping assembly. This means that elsewhere than around the origin the radial curve remains similar to that which would have been obtained for an equivalent assembly not having a radial projection. The damping assembly therefore provides equivalent damping without degradation around the origin.

[0072] The radially protruding shape makes it possible in particular to adapt to the variations in shape induced by the manufacturing tolerances of the support and the base. It allows for more or less strong crushing in the clearance between the support and the base to compensate for these variations. The damping assembly therefore adapts to the variations induced by the manufacturing tolerances of the parts of the assembly. The damping assembly provides adequate damping independently of the dimensional variations induced by these tolerances.

[0073] Furthermore, the damping assembly is particularly easy to manufacture. Indeed, by compensating for manufacturing tolerances, the radial projection makes it possible to avoid the need to excessively control these manufacturing tolerances, which simplifies the manufacturing process. The manufacture of the damping cylinder with such a radial projection is also not difficult to carry out, which contributes to improving the ease of manufacturing of the damping assembly.

[0074] [Fig. 10] illustrates an example of a damping assembly. The damping assembly comprises the support 200 illustrated in Figures 4 to 7 and the base 240. The base 240 comprises a circular opening 242. The support 200 configured to fit into the circular opening 242 of the base 240. In particular, the two ends of said damping cylinder comprise a respective shoulder 224, 225 forming a circumferential groove 226 around the cylinder. The circular opening 242 comprises a circular edge 241. The damping cylinder is held on the circular opening 242 by insertion, when the support 200 is pushed into the opening 242, of the circular edge 241 of the circular opening 242 into the circumferential groove 226 formed by the shoulders 224, 225. The base 240 and the base of the support 200 are made of aluminum in this example, and the damping cylinder 220 of silicone. The base 240 has a cylindrical interior shape in this example, but may have any shape in other examples.

[0075] [Fig. 11] shows the circular spacing 250 between the base 220 and the circular opening of the base 240 when the support is inserted into the circular opening. The circular spacing is induced by the manufacturing tolerances of the different parts of the damping assembly (base, damping cylinder and / or base). This circular spacing 250 is between the damping cylinder 220 and the circular opening of the base 240, that is to say between the outer lateral surface 222 of the damping cylinder and the edge 242 of the circular opening. The outer lateral surface 222 of the cylinder has a diameter smaller than the diameter of the edge 242 of the circular opening. The radial projection 230 protrudes from the outer lateral surface 222 of said damping cylinder 220, towards the outside of the damping cylinder 220.The radial projection 230 thus fills this circular gap 250 in the assembly, which is located between the damping cylinder 220 and the circular opening of the base 240.

[0076] [Fig. 12] shows examples of radial curves measured for damping assemblies like that of [Fig. 10]. In particular, the figure shows a first radial curve 301 measured for a first example of a damping assembly in which the clamping between the support and the base is minimal, and a second radial curve 302 measured for a second example of a damping assembly in which the clamping between the support and the base is maximal. In each of these examples, the clamping between the support and the base results from the dimensional variations induced by the manufacturing tolerances of the parts of the assembly, which result in a more or less strong clamping between the support and the base. The figure shows that in these two examples, the radial projection makes it possible to avoid the degradation of the rigidity at the origin. Indeed, for both clampings, the rigidity remains constant at the origin.The figure therefore shows that the radial protrusion makes it possible to compensate for dimensional variations of the parts induced by manufacturing tolerances. Indeed, the two examples, although different in terms of dimension, both provide regular and adequate damping, even at the origin. The radial protrusion of these assemblies allows . therefore to prevent the degradation of rigidity otherwise observed in existing damping assemblies.

[0077] The tables below also show the results measured in static (left table) and dynamic (right table) for the first example of a damping assembly in which the clamping between the support and the base is minimal. The results show that, even for such clamping, the stiffness remains within the lower and upper tolerances (“Toi. Inf” and “Toi. Sup”) of the desired specification value (“CDC”).

[0079] [Fig. 13] shows another example of a damping assembly. This other example is according to the second of the options discussed above. In this other example, the radial projection 330 protrudes from the inner lateral surface 323 of the damping cylinder 320. The damping assembly comprises a support 300 and a base 340 comprising a circular opening into which the support 300 can be inserted.

[0080] The support 300 comprises a base 310 having a rod 312 having a cylindrical outer lateral surface 313 and a shoulder 314 disposed at one end of the rod 312. The shoulder 314 has the shape of a disc centered and perpendicular to the axis 317 of the support 300, which is also that of the rod 312 and the damping cylinder 320. The shoulder 314 can serve as a support for a mechanical part, such as a radiator. The support of the mechanical part can result from the contact of the latter with an upper surface of the shoulder 314, this contact blocking the movement of the mechanical part in the direction of the axis of the support 317.

[0081] The support 300 also includes the damping cylinder 320. The damping cylinder 320 includes an inner side surface 323 surrounding the outer side surface of the rod 312 and an outer side surface 322. The outer side surface 323 is cylindrical in shape and has a diameter slightly larger than that of the rod 312, which results in a circular spacing between the inner side surface 323 and the outer side surface 313 of the rod 312 when the support 300 is inserted into the circular opening of the base 340. This circular spacing is filled by the radial projection 330 emerging from the inner lateral surface 323.

[0082] The outer lateral surface 322 is configured to, when the support 300 is inserted into the base 340, hold the support 300 on the base 340. In particular, the outer lateral surface 322 is configured to hold itself on the circular opening of the base 340. In this example, the two ends of said damping cylinder comprise a respective shoulder 324, 325 forming a circumferential groove 326 around the cylinder. The damping cylinder 320 is held on the circular opening of the base 340 by inserting the circular edge 341 of the circular opening into this circumferential groove 326 formed by the shoulders 324, 325.

[0083] The damping cylinder 320 comprises the radial projection 330, which is unique and which protrudes from the inner lateral surface 323 of the damping cylinder 320. The radial projection 330 is, when the support 300 is inserted into the circular opening of the base 340, compressed in the circular spacing between the inner lateral surface 323 of the damping cylinder and the outer lateral surface 313 of the rod 312. The radial projection 330 runs around the circumference of the outer lateral surface 323. The radial projection 330 is positioned longitudinally, that is to say along the axis 317 of the support, substantially at the center of the rod 312 of the base 310 and the damping cylinder 320. The radial projection 330 is positioned longitudinally at the center of the inner lateral surface 323 of the damping cylinder.

[0084] The radial projection 330 is now discussed in more detail with reference to [Fig. 14]. In this example, the radial projection 330 has a generally semicircular cross-section. The radial projection 330 also includes rounded edges 332, 333 at the junctions with the inner side surface 323 of the damping cylinder 320. The cross-section of the radial projection 330 is constant around the entire circumference of the inner side surface 323. The radial projection 330 has a thickness 334 greater than the result of adding the manufacturing tolerance of the base 310 and the manufacturing tolerance of the damping cylinder 320.

Claims

Claims

1. A damping assembly comprising: • a base (240, 340) comprising a circular opening (242), and • a support (200, 300) configured to fit into said circular opening of said base, the support comprising: • a base (210, 310) having a cylindrical outer lateral surface, and • a damping cylinder (220, 320) comprising an inner lateral surface (323) surrounding the outer lateral surface of said base and an outer lateral surface (222, 322) configured to hold on said circular opening, wherein said damping cylinder comprises at least one radial projection (230, 330) extending from the inner lateral surface (323) of said damping cylinder or from the outer lateral surface (222) of said damping cylinder.

2. An assembly according to claim 1, wherein the assembly comprises a circular spacing (250) between said base (210, 310) and said circular opening (242) when the support (200, 300) is inserted into said circular opening (242), said at least one radial projection (230, 330) having a radial thickness greater than that of said circular spacing (250).

3. An assembly according to claim 1 or 2, wherein the thickness of said at least one radial projection (230, 330) is greater than the result of adding the manufacturing tolerance of the base (240, 340) or the base (210, 310) and the manufacturing tolerance of the damping cylinder (220, 320).

4. An assembly according to any one of claims 1 to 3, wherein said damping cylinder (220, 320) comprises a single radial projection, said single radial projection being positioned longitudinally substantially at the center of said base.

5. An assembly according to any one of claims 1 to 3, wherein said damping cylinder (220, 320) comprises a plurality of radial projections, said radial projections being distributed longitudinally along the along the said base.

6. An assembly according to any preceding claim, wherein both ends of said damping cylinder (220, 320) comprise a respective shoulder (224, 225, 324, 325) forming a circumferential groove (226, 326) around said damping cylinder (220, 320), and said circular opening (242) comprising a circular edge (241, 341), said damping cylinder being held on said circular opening by insertion of said circular edge (241, 341) of said circular opening (242) into said circumferential groove (226, 326).

7. An assembly according to any preceding claim, wherein said damping cylinder (220, 320) is made of elastomeric material.

8. An assembly according to any preceding claim, wherein said at least one radial projection extends over all or part of the circumference of said damping cylinder.

9. Support belonging to an assembly according to any one of claims 1 to 8, in which said at least one radial projection protrudes from the outer lateral surface (222) of said damping cylinder.

10. Support belonging to an assembly according to any one of claims 1 to 8, wherein said at least one radial projection protrudes from the inner lateral surface (323) of said damping cylinder.

11. A method of manufacturing a support according to claim 9, the method comprising: • molding said damping cylinder onto said base.

12. A method of manufacturing a support according to claim 10.

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