Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G99/00—Subject matter not provided for in other groups of this subclass
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
  • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
  • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
  • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
  • B60G21/051—Trailing arm twist beam axles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G7/00—Pivoted suspension arms; Accessories thereof
  • B60G7/008—Attaching arms to unsprung part of vehicle
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G2200/00—Indexing codes relating to suspension types
  • B60G2200/20—Semi-rigid axle suspensions
  • B60G2200/23—Trailing arms connected by a U-shaped torsion bar
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G2200/00—Indexing codes relating to suspension types
  • B60G2200/40—Indexing codes relating to the wheels in the suspensions
  • B60G2200/464—Caster angle
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
  • B60G2202/20—Type of damper
  • B60G2202/22—Rotary Damper
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
  • B60G2202/20—Type of damper
  • B60G2202/24—Fluid damper
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
  • B60G2204/10—Mounting of suspension elements
  • B60G2204/12—Mounting of springs or dampers
  • B60G2204/129—Damper mount on wheel suspension or knuckle
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
  • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
  • B60G2204/45—Stops limiting travel
  • B60G2204/4502—Stops limiting travel using resilient buffer
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
  • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
  • B60G2206/016—Constructional features of suspension elements, e.g. arms, dampers, springs allowing controlled deformation during collision
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
  • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
  • B60G2206/50—Constructional features of wheel supports or knuckles, e.g. steering knuckles, spindle attachments

Definitions

• the present invention relates to a rear axle of a motor vehicle, comprising:
• a wheel support comprising a wheel axle
• connection of the wheel support to the oscillating arm permitting a rotational movement of the wheel support around an axis of rotation distinct from the wheel axle
• the link comprising at least two substantially flat elastic plates contained in two distinct planes; whose intersection coincides with the axis of rotation of the wheel support, each plate having a first edge secured to the oscillating arm and a second edge secured to the wheel support.
• rear train type deformable cross also called semi-deformable rear axle.
• This type of rear axle includes two swing arms connected by a cross member, and offers very good performance in guiding or behavior and high compactness compared to the multi-arm train.
• the technical problem to be solved is to improve the comfort of the vehicle passengers, while ensuring efficient road handling, this in economic conditions of interesting manufacturing.
• the invention relates to a rear axle of the aforementioned type, characterized in that it comprises at least one damper for reducing the kinetic energy of the wheel carrier in motion relative to the arm, the damper being applied between the oscillating arm and the wheel support.
• the rear axle comprises at least one stop member limiting the rotational movement of the wheel support relative to the oscillating arm;
• the stop member comprises at least two fixed rigid plates integral with the oscillating arm and adapted to cooperate with the elastic plates;
• the damper has a first end connected to one of the two fixed rigid plates of the stop member and a second end connected to the wheel support;
• the damper is of the telescopic type comprising an elongate hollow body and a rod projecting out of the body; the damper is of the gas or oil type;
• the rear axle further comprises at least one stop integral with the wheel support and disposed between the two fixed rigid plates, and in that the body of the damper is fixed on the stop;
• the damper is of the rotary type and comprises a rotary arm connected to the wheel support and a body fixed rigidly to a shock absorber support integral with the oscillating arm.
• the invention also relates to a vehicle comprising a rear axle as defined above.
• FIG. 1 is a view in perspective of the rear axle according to the invention showing a first embodiment
• FIG. 2 is a perspective view of the rear axle according to the invention showing a variant of the first embodiment
• FIG. 3 is a perspective view of the rear axle according to the invention showing a second embodiment
• FIG. 4 is a perspective view, on an enlarged scale, of an element of FIG.
• the X axis is the longitudinal axis of the vehicle, oriented from rear to front;
• the Y axis is the transverse axis, oriented from right to left;
• the Z axis is the vertical axis, oriented from bottom to top.
• Figure 1 is shown the right part 10 of a semi-deformable rear axle on which a wheel 12, shown in fine mixed lines, is mounted - A - rotary relative to a wheel support 14, itself fixed on a support plate 16.
• This plate 16 is connected to one end of an oscillating arm 18, which arm is hinged relative to the vehicle body at its other end via a yoke 19 fixing.
• a cross member 20 connects the oscillating arm 18 to a second swing arm not shown to form a complete rear axle type deformable cross.
• a suspension spring 22, shown in phantom, has a first end bearing on the vehicle body and a second end resting on a seat 24 of the oscillating arm 18.
• a suspension damper 26, also shown in phantom ends, has one end bearing on the vehicle body and another end resting on the oscillating arm 18. The system consisting of the spring 22 and the damper 26 provides a suspension effect.
• the wheel 12 is thus kept pressed against the ground via the oscillating arm 18 pivoting about an oscillation axis 27, which ensures a vertical movement of the wheel 12.
• the support plate 16 is connected to the oscillating arm 18 by an elastic connection 28, allowing an additional degree of freedom of the wheel 12 relative to the oscillating arm 18, which makes possible a rotation of the wheel support 14 around the an axis of rotation distinct from the wheel axle 12.
• the axis of rotation of the wheel support 14 is substantially parallel to the transverse axis Y of the vehicle and disposed at the ground on which the wheel 12 carries, or below.
• the elastic connection 28 comprises at least one front elastic plate 30 and a substantially flat rear elastic plate 32, which are contained in two distinct planes whose intersection coincides with the axis of rotation of the wheel support 14.
• the plates resilient 30, 32 form a V whose opening is oriented upwards.
• Each elastic plate has a first edge 30a, 32a integral with the oscillating arm 18 and a second edge 30b, 32b secured to the bearing plate 16.
• the elastic plates 30 and 32 act in flexion along the longitudinal axis X of the vehicle.
• the additional degree of freedom introduced by the elastic connection 28 corresponds to a longitudinal elasticity allowing the wheel 12 to move back along the longitudinal axis X of the vehicle. This is observed when an obstacle comes into contact with the wheel 12. The percussion force generated on the wheel is then attenuated by the recoil of the wheel to improve the comfort of the vehicle. Thereafter, the wheel returns to its initial position due to the elasticity of the connection 28, and this when the percussion force is canceled.
• the rear axle 10 further comprises a rigid front plate 34 and a rear rigid plate 36, both fixed and integral with the oscillating arm 18.
• Each rigid plate 34, 36 has a first edge 34a, 36a integral with the swing arm 18 and a second free edge 34b and 36b.
• a front stop 38 (FIG. 2) and a rear stop 40 integral with the support plate 16 of the wheel support 14 are arranged between the two rigid plates 34 and 36.
• a not shown spacer of elastic material such as an elastomer or a rubber, is interposed in the space between the rear stop 40 of the rear rigid plate 36, and between the space which separates the abutment. before 38 of the rigid plate before 34.
• the limitation of the movement of the wheel support 14 relative to the oscillating arm 18 is carried out progressively by crushing the spacer.
• a damper 42 applied between the oscillating arm 18 and the wheel support 14 reduces the kinetic energy of the wheel support 14 in movement relative to the oscillating arm 18.
• This damper is adapted to reduce the kinetic energy of the support of wheel (14) moving relative to the arm (18).
• the damper 42 is of the telescopic type, and comprises a hollow elongated body 44 and a rod 46 projecting out of the body.
• the rear end 48 of the damper 42 that is to say the end integral with the body 44, is articulated in a yoke 50 integral with the support plate 16 of the wheel support 14.
• the front end 52 of the damper 42 that is to say the free end of the rod 46, is articulated in a yoke 54 secured to the rigid plate before 34, which clevis 54 disposed near the free edge 34b.
• the damper 42 is of the gas or oil type, for example of the type commonly used as a vehicle boot cylinder.
• a damper 142 of the gas or oil type has a body 144 of short length and a rod 146 projecting out of the body.
• the body 144 is integrated with and fixed on the front stop 38, which is then devoid of spacer.
• the front end of the rod 146 is hinged, for example, by means of a ball joint, on the rigid front plate 34.
• a shock absorber 242 of rotary type comprises a body 244 fixed rigidly to a reinforcement 56 integral with the oscillating arm 18, and a rotating arm 246 rotated relative to the body 244 along an axis 248 ( Figure 4) substantially parallel to the transverse axis Y of the vehicle.
• the arm 246 is connected to the support plate 16 of the wheel support 14 via its free end 250 ( Figure 4).
• a hydraulic damper 242 is a hydraulic damper, for example of the type commonly used for the steering of motorcycles.
• the damper 42, 142 and 242 reduce the kinetic energy of the wheel carrier in motion relative to the arm.
• the elastic plates 30 and 32 return to their initial position thanks to their bending elasticity and the damper 42, 142 and 242 reduce again the kinetic energy of the wheel support in its reverse movement by relative to the swingarm 18.
• the rotational movement of the wheel support relative to its axis of rotation distinct from the wheel axis is damped, which gives the semi-deformable rear axle improved longitudinal flexibility, and what represents improved comfort for the passengers of the vehicle.
• the use of the damper does not degrade the road behavior of the vehicle, and, its unit cost being low, the economic conditions of manufacture remain interesting.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Vehicle Body Suspensions (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=36991106

Family Applications (1)

Country Status (5)

Families Citing this family (6)

Family Cites Families (3)

• 2006
  • 2006-01-11 FR FR0600238A patent/FR2895938B1/fr not_active Expired - Fee Related
  • 2006-12-20 CN CN2006800508718A patent/CN101356069B/zh not_active Expired - Fee Related
  • 2006-12-20 BR BRPI0621097-0A patent/BRPI0621097A2/pt active Search and Examination
  • 2006-12-20 EP EP06847184A patent/EP1971498A1/de not_active Withdrawn
  • 2006-12-20 WO PCT/FR2006/051394 patent/WO2007080295A1/fr active Application Filing

Non-Patent Citations (1)

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