Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60G—VEHICLE SUSPENSION ARRANGEMENTS
  • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
  • B60G11/18—Resilient suspensions characterised by arrangement, location or kind of springs having torsion-bar springs only
• • 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
  • 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
  • B60G21/052—Mounting means therefor
  • B60G21/053—Mounting means therefor adjustable
• • 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
  • B60G2200/21—Trailing arms connected by a torsional beam, i.e. twist-beam axles
• • 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
  • B60G2200/44—Indexing codes relating to the wheels in the suspensions steerable
• • 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
  • B60G2204/122—Mounting of torsion springs
  • B60G2204/1226—Mounting of torsion springs on the trailing arms of a twist beam type arrangement
• • 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
  • B60G2206/20—Constructional features of semi-rigid axles, e.g. twist beam type axles

Definitions

• the invention relates to a torsion beam axle for a wheel suspension of a motor vehicle, according to the preamble of patent claim 1.
• Trailing arm as well as the conventional live axle. They are usually simple and consist essentially of two torsion and rigid longitudinal members, which are connected to each other via a likewise rigid, but torsionally soft cross member. Due to the torsionally soft design of the cross member, a mutual entanglement of the wheels carrying trailing arm is made possible. At the same time, the crossbeam of the torsion-beam axle assumes the role of a roll stabilizer for the vehicle.
• the torsion beam axle generally allows a good straight-ahead, which is ensured by the fact that both side members rigidly guide their wheel in the longitudinal direction.
• the trailing arm pivot at gleich realizedem compression and rebound with the cross member as a horizontal pendulum to the pivot points on the vehicle floor, so that the wheel track changes only very slightly. In mutual compression springs the cross member and compensates for height differences between the two wheels.
• a generic twist beam axle is known from DE 10 2008 002 639 A1 for a motor vehicle.
• This torsion beam axle has a cross member which torsionally soft couples the deflection of the rear wheels of the motor vehicle via longitudinal members.
• the cross member is on each end Vehicle side connected to a trailing arm, to each of which a vehicle is mounted.
• a wheel carrier which allows by means of a pivotal connection with the trailing arm a steering movement of the respective vehicle wheel.
• an actuator device which is connected via a tie rod with the wheel carriers.
• the twist beam axle can - depending on
• tie rod and actuator device have optimized with regard to the minimization of track differential angles kinematic design.
• the invention relates to a torsion beam axle for the suspension of a motor vehicle, wherein the torsion beam axle has a twistable transverse profile and in each case one connected to the transverse profile trailing arm at each of the two ends of the transverse profile.
• the cross profile is also referred to as a cross member and may have the shape of a rounded or square U or V or a combination in cross section.
• the transverse profile can be formed from a combination of said forms and both one-piece and multi-part.
• the cross profile can be used as a pressed part z. B. be made of a tube or be manufactured as a hydroformed component.
• Each trailing arm carries a pivotable about a steering axis
• Wheel carrier wherein the wheel carrier by means of a tie rod via ball joints
• the generic twist beam axle is further developed by the invention to the effect that acts on the tie rod, a kinematic coupling arrangement, wherein the coupling arrangement for limiting the rotational
• a vehicle When reference is made above or below to a vehicle, it may mean both a motor vehicle equipped with a drive and a non-driven vehicle such as a trailer on which a torsion-beam axle is present.
• rotational degree of freedom of movement of the tie rod is to be understood in the sense of the invention in that it means the rotation about the axis defined by the two ball joints, via which the tie rod is usually connected to the wheel carriers. Is the
• Tie rod not cranked but just as executed in a pipe, so the rotation of the tie rod is meant about its longitudinal axis.
• Track rod a generic twist beam axle - due to their connection to the wheel carriers, which typically takes place via ball joints - a rotational degree of freedom and can rotate about the axis defined by the ball joints or pivot about this. This means that both the tie rod and the actuator rod acting on the tie rod of a generic twist beam axle - due to their connection to the wheel carriers, which typically takes place via ball joints - a rotational degree of freedom and can rotate about the axis defined by the ball joints or pivot about this. This means that both the tie rod and the actuator rod acting on the tie rod of a generic
• Twist-beam axle may have a kinematic sub-determination. This can, as stated above, to undesirable operating conditions, in particular to Track errors or track differential angles, for example, but not exclusively, lead to one-sided compression of the torsion beam axle.
• kinematic coupling through the coupling arrangement of the rotary degree of freedom of movement of the tie rod is limited by the interaction of the coupling arrangement with the other attachment points of the tie rod in the form of ball joints on the wheel carriers and.
• the tie rod can thus no longer rotate or pivot freely about its longitudinal axis or about the axis defined by the two ball joints of the wheel carrier, which advantageously results in the kinematic specific position of the tie rod.
• the tie rod can therefore only perform the intended, substantially translational movements approximately transversely to the direction of travel or approximately parallel to the transverse profile of the torsion beam axle. So is by the
• Tie rod the actuating travel of the actuator transferred to the wheel, which in turn the desired steering angle of the wheel or
• the invention is first of all realized independently of where and how the coupling arrangement is fastened, as long as this restricts the rotational freedom of movement of the tie rod.
• the coupling arrangement is attached to the transverse profile of the torsion beam axle. In this way, there is a space-saving accommodation of the coupling arrangement on the beam axis, and the tie rod can the
• the restriction of the rotary degree of freedom of movement of the tie rod further occurs in that the coupling arrangement, the tie rod approximately parallel to the vehicle vertical axis, in particular parallel to the vehicle vertical axis.
• the connection of the coupling arrangement but also take place along a direction tangential to the axis of rotation of the tie rod. So z. B. also possible a connection approximately parallel to the vehicle longitudinal axis or parallel to the vehicle longitudinal axis.
• the term "along a direction tangential to the axis of rotation of the tie rod” is to be understood in the sense of the invention that direction, which - results in an imaginary rotation of the tie rod about the ball joints of the wheel carrier defined longitudinal axis - at the point of the coupling arrangement on the tie rod , If, in other words, an articulation of the tie rod in the point of the coupling arrangement on the tie rod along the vertical direction or vehicle vertical axis or along the direction mentioned, so that the limitation of the rotational degree of freedom of movement of the tie rod is achieved.
• the coupling arrangement comprises a pendulum support.
• the pendulum support - in terms of the rotational degree of freedom of the tie rod - kinematically couples the transverse profile of the torsion beam axle with the tie rod.
• the design of the coupling arrangement in the form of a pendulum support can be realized inexpensively, takes up little space and can also be designed to dampen vibration, for example by the use of elastomeric bearings for the pendulum support.
• the longitudinal axis of the pendulum support extends approximately parallel or parallel to the vehicle vertical axis, or parallel to a direction tangential to the axis of rotation of the tie rod.
• a further preferred embodiment of the invention provides that the attack of the pendulum support on the tie rod approximately center of the tie rod, in particular in the middle of the tie rod.
• the track rod-side joint of the pendulum support is arranged in the shear center of the transverse profile of the torsion beam axle.
• the shear center of the cross profile is that imaginary point on
• Bouncing movement of the torsion beam axle is similar to the kinematics of the torsion beam axis - due to the twisting of the transverse profile - the kinematics of a trailing arm axis, and there is a moment axis of the compression movement, which runs through the respective bearing of the deflecting trailing arm on the one hand, and by the imaginary shear center of the cross profile on the other.
• this embodiment entails that the
• the invention is first realized independently of how the connection of the actuator takes place to the tie rod of the torsion beam axle. Again with regard to a minimization of track difference angles or an elimination of any asymmetrical behavior in one-sided deflection, it is provided according to a further embodiment of the invention that the connection between the actuator and the tie rod by means of a vehicle transverse direction in the middle of the tie rod
• the articulated connection between the actuator and tie rod has two degrees of freedom, and thus is preferably a ball joint, a sleeve joint or an elastomeric bearing, which allows rotational movements and to a limited extent gimbal deflections.
• an elastomer bearing is not only a comfort improvement, but also a reduction in the susceptibility to wear of the items, and thus an increase in the life of the steerable torsion beam axle overall.
• the actuator is an electromotive, a hydraulic or a pneumatic actuator, depending on which auxiliary energy is present in the motor vehicle or can be used in a simple manner as a drive of the actuator, so that additional structural or constructive Expenditure is largely avoidable.
• the actuator according to this embodiment can be optimally integrated into the system.
• the actuator is attached to one of the trailing arm. This has the advantage that in each case a region of high stability of the trailing arms
• Twist-beam axle is present. In particular, there are almost no by
• Twist-beam axle can work trouble-free in this way.
• the attachment of the actuator is still variable within limits, so that an adaptation to the space available in the vehicle space is possible.
• FIG. 1 is an isometric illustration of a steerable torsion beam axle according to an embodiment of the present invention.
• the FIG. Shows a steerable torsion beam axle, for example for the
• Cross member 1 and two connected to the cross member 1 trailing arm 2, 3 comprises.
• elastomeric bearings 4, 5 are arranged for connection to a (not shown) vehicle chassis.
• the trailing arms 2, 3 each have spring plates 6, 7 for receiving the (also not shown) suspension springs.
• each trailing arm 2, 3 carries a wheel carrier 8, 9, which in each case about a vehicle-related (approximately, except for spreading and caster) vertically extending steering axle 10, 1 1 is pivotable.
• the wheel carrier 8, 9 are over
• Ball joints 12, 13 connected to a tie rod 14, which by means of a
• Actuator 15 along the direction of the arrow 1 6 back and forth is movable.
• the actuator 15 is attached to the drawing-related right trailing arm 3, in order in this way adverse effects of occurring during operation of the torsion beam axle
• the torsion beam axle has a here as
• Pendulum support 17 trained coupling arrangement.
• the pendulum support 17 inhibits the vertical movement of the tie rod 14 along the direction of the arrow 18 (which is a direction tangential to the imaginary rotation of the tie rod about the through the
• Ball joints 12 and 13 defined axis of rotation corresponds).
• Pendulum support 17 with her drawing related lower end of the tie rod 14, and is connected at its subscription-related upper end by means of a support bracket 19 with the transverse profile 1 of the torsion beam axle.
• the actuator 15 engages - as well as the pendulum support 17 - in the middle of the
• Tie rod 14 so that in this respect a symmetrical steering behavior of the torsion beam axle is ensured both in both sides as well as unilateral compression.
• the imaginary instantaneous axes of the compression movement of the torsion beam axis are indicated, as they result in each unilateral compression of the trailing arm 2, 3 with the wheel carriers 8, 9 arranged thereon.
• the drawing related left trailing arm 2 pivots with the wheel carrier 8 disposed thereon approximately on the instantaneous axis 20, while the drawing related right trailing arm 3 with the wheel carrier 9 arranged thereon in turn at one-sided compression
• One-sided compression movements are similar in the illustrated torsion beam axle (in which the transverse profile approximately in the middle of the trailing arm 2, 3) thus the compression movement of a trailing arm axis, which is advantageous in terms of the self-steering behavior and the toe angle in one-sided compression.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Vehicle Body Suspensions (AREA)
• Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=46758775

Family Applications (1)

Country Status (7)

Families Citing this family (14)

Family Cites Families (16)

• 2011
  • 2011-09-15 DE DE102011082768A patent/DE102011082768A1/de not_active Withdrawn
• 2012
  • 2012-09-03 JP JP2014530149A patent/JP2014530141A/ja active Pending
  • 2012-09-03 KR KR1020147006688A patent/KR20140068065A/ko not_active Application Discontinuation
  • 2012-09-03 EP EP12753142.4A patent/EP2755833A1/de not_active Withdrawn
  • 2012-09-03 WO PCT/EP2012/067071 patent/WO2013037652A1/de active Application Filing
  • 2012-09-03 US US14/240,409 patent/US9073402B2/en not_active Expired - Fee Related
  • 2012-09-03 CN CN201280040958.2A patent/CN103747969A/zh active Pending

Non-Patent Citations (1)

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