Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
  • B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
  • B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
  • B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
  • B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
  • B60G15/062—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the spring being arranged around the damper
  • B60G15/063—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the spring being arranged around the damper characterised by the mounting of the spring on the damper
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
  • B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
  • B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
  • B60G15/067—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper characterised by the mounting on the vehicle body or chassis of the spring and damper unit
  • B60G15/068—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper characterised by the mounting on the vehicle body or chassis of the spring and damper unit specially adapted for MacPherson strut-type suspension

Definitions

• the invention relates to a vehicle wheel suspension device, comprising a damper mounted between the wheel hub holder and the vehicle body, and a helical spring mounted between a lower cup secured to the damper cylinder and an upper cup mounted integral with the shock absorber rod.
• a thrust ball is mounted between the upper cup and the vehicle body chapel.
• This thrust ball bearing has, during steering deflection, a slip resistance threshold causing undesirable stiffness of the steering.
• a first object of the invention is to improve the suspension devices of known type, by removing the upper ball stop and replacing it with an elastic system whose actuating torque is substantially proportional to the pivot angle.
• a second object of the invention is to produce this elastic system in modular form, so as to allow assembly in the factory of an interchangeable modular assembly comprising a shock absorber and an associated spring.
• a third object of the invention is to allow a presetting in torsion of this interchangeable assembly, after assembly to the body of the vehicle, to ensure compensation for any lateral force due to the tire.
• the invention relates to a vehicle wheel suspension device comprising a shock absorber mounted between the wheel hub carrier and the vehicle body, and a helical spring mounted between a lower cup secured to the shock absorber cylinder and a upper cup mounted integral with the shock absorber rod, characterized in that the upper cup is integral with a laminated elastomer assembly integral with a part for fixing to the body of the vehicle, preferably to a chapel formed in the body of the vehicle, said body attachment part being angularly adjustable relative to the body.
• the attachment part to the vehicle body is shaped as a convex cup adjusted to the interior surface of the body chapel;
• the upper end of the helical spring is angularly indexed by insertion into a part of one of the lower or upper cups, which is advantageously molded by an elastomeric material, at least in the support zone of the spring;
• the body attachment part is pivotally mounted relative to said body by means of a rotation adjustment lever;
• the fastener and the body each have a plurality of orifices located on circles of the same diameter and spaced so as to allow angular indexing during the mechanical assembly of the fastener to the body and the body;
• the body fastening part has a radially inner part cooperating with an expansion stop to prevent the release of the shock absorber in the event of takeoff of the vehicle wheel with rupture of the laminated elastomer assembly;
• the radially inner part is coated at least partially or overmolded with a shock absorbing material
• the body comprises a plurality of first conformations and the part for fixing to the body a plurality of second conformations, and a first conformation of the body cooperates with a second conformation of the part for fixing to the body to ensure indexing between body and attachment to the body;
• the body fastening part is shaped to snap into the body.
• FIG. 1 schematically shows a vertical elevation view with partial section of a suspension device according to the invention
• FIG. 2 schematically shows a partial view in enlarged section of a suspension device similar to that of Figure 1;
• FIG. 3 schematically shows an enlarged sectional view along line III-III of Figure 4 of a second alternative embodiment of the invention
• FIG. 4 schematically shows a top view of the device of Figure 3;
• FIG. 5 schematically shows a half-view in section along the line V-V of Figure 6 of a third alternative embodiment of the invention
• FIG. 6 schematically shows a half top view of the device of Figure 5;
• FIG. 7 schematically shows a half sectional view of a fourth embodiment of the invention.
• FIG. 8 schematically shows a half sectional view of a fifth embodiment of the invention.
• a wheel assembly 100 comprising a tire, a rim and fixing bolts is mounted on the hub of a vehicle hub carrier 101.
• a damper 102 is mounted between the hub carrier 101 and the body 103 of the vehicle.
• a helical spring 104 is mounted between a lower cup 105 secured to the cylinder 102a of the shock absorber 102 and an upper cup 106 mounted secured to the rod 102b of the shock absorber 102.
• the upper cup 106 is secured to a laminated elastomer assembly 107, itself secured to a fastening piece 108 to the body 103 of the vehicle.
• the nut 109 for fixing the rod 102b of the shock absorber to the upper cup 106 also maintains a stop 110 for relaxation preventing the release of the shock absorber in the event of takeoff of the vehicle wheel with rupture of the laminated elastomer assembly 107.
• the body 103 of the vehicle is shaped so as to present a body chapel 111.
• the part 108 for fixing to the body 103 of the vehicle is advantageously shaped as a convex cup adjusted to the interior surface of the chapel 111 of body.
• the attachment of the piece 108 to the body 103 is carried out by mechanical assembly, bolting or screwing shown diagrammatically by the axis lines 112.
• the assembly 107 laminated elastomer consists essentially of molding of elastomer having a low resistance to torsion with interposition of trunks of metal cone 113a, 113b of small thickness between the layers of elastomer.
• the laminated assembly obtained by overmolding of an elastomer with a hardness of less than 50 degrees Shore has a low resistance to torsion over a large angular deflection range.
• the effect of the laminating of this assembly is to obtain the addition of the torsion angles of each elastomeric truncated cone interposed between the upper cup 106, the first truncated cone 113a, the second truncated cone 113b, and the cup convex 108.
• an overmolding of the upper cup 106 is provided at least in the vicinity of the orifice 114 for engaging the end 104a of the spring 104 in the cup 106.
• This at least local overmolding makes it possible to avoid any impact noise. by fixing the end 104a of the helical spring 104 to ensure its angular indexing.
• the overmolding is preferably carried out in a single operation, which also leads to overmolding the upper surface of the cup 106 and most of its internal flaring.
• 113a, 113b made of metal is in no way limited to this material, but extends to other materials capable of being molded and having a stiffer torsional characteristic than the overmoulding elastomer: mention may in particular be made of all textiles , nonwovens, thermoplastic or thermosetting materials capable of being overmolded.
• the main thing is to separate the angularly deformable zones formed by the parts overmolded in elastomer and the zones having torsional rigidity constituted by the intermediate cone trunks 113a, 113b.
• the fixing piece 108 is angularly adjustable relative to the chapel 111 of the body 103.
• a lever 115 engaged in a slot at the upper end of the part 108 is mounted on an axis 116 integral with the body 103; provision may be made to interpose an anti-friction material between the part 108 and the chapel 111.
• the end of the lever 115 opposite the end welded to the part 108 is shaped to engage in recesses 117a to 117e separated by notches 118a to 118d.
• the recesses 117 and the notches 118 are formed in a part 119, for example, an angle iron formed in an arc of a circle, fixed to the body 103 by mechanical assembly (bolting, screwing, spot welding, etc.).
• the part 108 for fixing to the chapel 111 of the body 103 comprises a plurality of orifices 121a to 121g.
• the body 103 comprises in the vicinity of the chapel 111 a plurality of orifices 122a to 122e situated substantially on the same diameter as the orifices 121a to 121g.
• the orifices 121 are regularly spaced at a different pitch from the regular spacing pitch of the orifices 122.
• the angular adjustment of the fixing piece 108 relative to the body 103 can thus be carried out in the manner of a vernier, so to perform precise angular indexing of the part 108 for fixing relative to the body 103.
• the mechanical assembly of the part 108 is made to the chapel 111 by means of a screw or a bolt 123 assembly.
• the invention thus provides a means for adjusting the torsion of the suspension, so as to at least partially compensate for pulling or drift forces due to the tire.
• the upper cup 106 is assembled by means of the damper rod 104b and the nut 109 (not shown) to a relaxation stop 124 advantageously having a form of revolution.
• the part 108 for fixing to the body 103 by means of the mechanical assembly 125 has a radially inner part 126 which cooperates with the rebound or rebound stop 124 to prevent the release of the shock absorber in the event of take-off or lifting. vehicle wheel.
• the radially inner part 126 is advantageously coated or at least partially overmolded with an impact-resistant material, for example a polyamide.
• an impact-resistant material for example a polyamide.
• the overmolding 127 has an annular shape substantially coaxial with the axis of revolution 128.
• This advantageous embodiment of the invention allows the factory to manufacture the damper assembly comprising the expansion stop 124, the radially inner part 126 of the fixing piece.
• the fixing piece 108 has an annular rim 129 adapted to snap into place with the rim 130 of the body 103.
• the body 103 is provided with a plurality of indentations
• the invention is in no way limited to the variant embodiments described above, but extends to any device comprising a spring and a damper, comprising a laminated elastomer assembly whose angle of rotation is substantially proportional to the torques applied without having threshold and having an arrangement for manufacturing in the factory a modular assembly comprising a shock absorber and an associated spring, ready to assemble directly to the body or to the vehicle body chapel.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Fluid-Damping Devices (AREA)
• Vehicle Body Suspensions (AREA)
• Vibration Prevention Devices (AREA)
• Springs (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9511415

Family Applications (1)

Country Status (7)

Cited By (2)

Families Citing this family (5)

Citations (9)

• 1997
  • 1997-09-24 FR FR9711868A patent/FR2768659A1/fr not_active Withdrawn
• 1998
  • 1998-08-10 DE DE69810788T patent/DE69810788T2/de not_active Expired - Lifetime
  • 1998-08-10 EP EP98941576A patent/EP1015264B1/fr not_active Expired - Lifetime
  • 1998-08-10 KR KR1020007003000A patent/KR20010030650A/ko not_active Application Discontinuation
  • 1998-08-10 JP JP2000512697A patent/JP2001517572A/ja not_active Withdrawn
  • 1998-08-10 WO PCT/FR1998/001779 patent/WO1999015351A1/fr not_active Application Discontinuation
  • 1998-08-10 BR BR9813212-1A patent/BR9813212A/pt not_active Application Discontinuation
• 2008
  • 2008-01-25 JP JP2008015657A patent/JP2008150037A/ja active Pending

Patent Citations (9)

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