JPS6141606A - Axle suspension system for automobile - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rigid axle supported via a spring that does not provide guidance, whose heights are offset from each other laterally and which is swingable relative to an m-beam. are each guided by two guiding suspension arms which are pivotally mounted on the vehicle body and which extend in mutually opposite directions at right angles to the wheel axis to determine a gIm axis for the wheel axis, BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an axle suspension for a motor vehicle, in particular a passenger car, in which the wheel axis can be displaced in a positive diagonal direction about a pivot axis during an approach movement.

Prior Art Such axle suspensions are known (U.S. Pat. No. 22
No. 26047 “Figure 5 of the detailed oath).

In this construction, the rigid axle has a wheel holder at each end of its m-beam, to which each one of the guide suspension arms is pivotally connected above and below the narrow.

Each wheel holder includes a journal that supports a wheel. The journal is provided on the wheel holder with a lateral offset relative to the narrow leaf, such that the wheel axis defined by the journal lies radially apart in front of the narrow leaf when viewed in the longitudinal direction of the vehicle. .

The journal is therefore provided on the lever with respect to the narrow leaflet, the length of which is equal to both stiffnesses of the suspension arm jI! It is equal to the distance between the joint TM line and the wheel axis at the 1III pivot point.

This axle suspension provides the following benefits for positive deflection: That is, the rigidity jlI connection I of the pivot point of the suspension arm on the shaft side! Since the car I9 Tsumugi Warabi is shifted in any direction with respect to the gland as described above, when the car approaches the car body, the wheels move along the oscillation axis parallel to the car mma with respect to the part of the rigid axle guided by the guide suspension arm. Move up and backward around. The movement of the wheel axis towards the vehicle body is therefore carried out in the direction of the collision caused by the wheel passing over the irregularities, which is desirable in an axle suspension system.

The magnitude of the rocking angle of the narrow leaf or its wheel holder that produces a positive diagonal deflection is determined by the length of the suspension arm and the distance between the connecting straight line of the suspension arm pivot point to the rigid axle and the wheel axis. Ru.

In this case, in order to obtain the trajectory curve of the wheel axis required for a normal diagonal deflection of 3e to 6°, the length of the suspension arm provided below the wheel axis is greater than the length of the suspension arm provided above the wheel axis. choose.

However, this results in the following drawbacks. That is, when the wheels on both sides approach and move away from the car body on one side and on the opposite side, the narrow leaves perform a steering movement, and as one side approaches the car body and moves away from the car body, the narrow leaves are subjected to additional torsional stress. receive.

Problem to be Solved by the Invention The problem on which the invention is based is, therefore, to solve the problem when approaching and separating vehicles on one side and on opposite sides.
To prevent the Ni beam from being subjected to steering motion or torsional stress,
The object is to present an axle suspension of the first type mentioned.

Means for Solving the Problem In order to solve this problem, according to the present invention, the guide B suspension arm of each suspension arm pair is swingable about the swing a axis that is deviated in height from the wheel axis. Together with the rocking pieces supported on the rigid axle, they form a linear guide device that guides the rocking axis in a vertical plane, and the rocking of the wheel axis around the rocking axis is supported by an additional The positive diagonal momentum is controlled via the holding arm.

In this axle suspension system that can swing diagonally, the narrow leaf is supported by a linear guide device formed by a suspension arm and a swinging piece so as to be swingable around a rocking line parallel to the wheel axis. There is. During the approach and separation of the vehicle, the pivot axis is guided by this linear guide in a vertical plane perpendicular to the longitudinal direction of the vehicle. Therefore, steering movement of the narrow leaf cannot occur.

The movement of the narrow leaf that performs the jumping motion is carried out by guide arms, and during the vehicle body approach movement, the narrow leaf is swung from each of these guide paths 3 around the swing axis in a direction opposite to the forward direction. , the vehicle body is swung in the opposite direction during the lifting movement.

Therefore, when the vehicle approaches or moves away from the vehicle, the rigid foot
In the structure according to the invention, the motion of do.

Advantageous developments of the invention are the subject of the dependent claims.

Example Other features and details of the invention are for passenger cars.

It will emerge from the following description of an illustrated embodiment of an axle suspension according to the invention, which is designed as a rear axle suspension.

A rigid axle IQ is generally shown in FIG. 1, the e.g. tubular lobes 12 each having a journal 18 at each end thereof for supporting a wheel 14,16.

Wheel axle, I! Above the horizontal plane passing through 41, on the narrow leaf 12, i.e. on the peripheral part thereof, in the vicinity of the wheel, support tongues 20, 22 are respectively provided, between which the swinging of the Watt-type approximate linear motion mechanism 26 or 28 is provided. One support pin 30 is retained in each case, which supports the pieces 24. The support pin 30 is therefore above the horizontal plane passing through the wheel axis 41 6 The support tongues 20 , 22 extend, for example, diagonally forward and upwardly when viewed in the forward direction in this embodiment, so that they have the same radius relative to the wheel axis 41 . The lower part of the rocker piece 24, which is supported at a directional distance, is in front of the narrow leaf 12.

Suspension arms 32 and 34, which are pivotally connected to the upper and lower end ranges of the i-moving piece 24 of the Watt type approximate linear movement 1aI8I& structure, extend substantially horizontally away from the rocking piece in the manufactured state;
It is parallel to the longitudinal center axis of the vehicle. These suspension arms are pivotally connected to the vehicle body 40 at 36 and 38. Of course, within the given structural conditions, the suspended arm
It can also be provided obliquely to the horizontal line in the manufactured state.

Swing piece support pin 3 eccentrically provided on the wheel shaft tQ41
0 defines a swing axis 42 extending in the direction of the wheel axis 41 and parallel to this, about which the narrow leaf 12 can swing. This will be discussed further later. This horizontal pivot axis 42 is therefore located in front of the vertical plane a--a passing through the center of the wheel and extends at right angles to the longitudinal center plane dd of the vehicle. The pivot axis 42 lies above the wheel axis 41 in the illustrated embodiment. This swing axis is ZII i
It may be provided below the Q-axis or after the vertical plane a-a.

Upper suspension arm 32 of Watt type approximation linear a excitation mechanism 26.28
Under certain boundary conditions, it is most advantageous to set the rocker piece 24 substantially vertically in the fabricated state, taking into account that the rocker piece 24 intersects the narrow leaflet 12.

When the axle @12 performs a vehicle approach and vehicle body separation movement to the same side, to one side or to opposite sides, both Watt-type approximate linear motion machines tlj26, 28 are mounted on a rigid axle 10 supported against the vehicle body 40 by non-guiding springs. The axis of movement @12 is Unable to carry out proper steering movements.

46 indicates a guide arm, by means of which the narrow leaf 12 swings about the horizontal swing axis 42 in FIGS. 42 can be made to have a tendency to be displaced in the direction of the horizontal position. This results in a body-approaching deflection of the rigid axle 10 in the direction of the wJ impact acting on one or both 1TI transports, a so-called positive diagonal deflection.

It is advantageous for the guide arm 46 to simultaneously take over the lateral guidance of the rigid axle 10, and thus in the embodiment according to FIGS. . This suspension, the end approaching the taper of the arm, is located at the longitudinal center of the narrow leaf 12, especially below the wheel axis 41.
The free ends of its two legs 47 and 49, which are pivoted at point 8 and which diverge from one another from a pivot point 48, are pivoted at a corner in front of the pivot axis @42 when viewed in the longitudinal direction of the vehicle. Axis llA
It is supported by the vehicle body 40 so as to be swingable around a swing axis 56 parallel to the vehicle body 42 . The rigid axle side landing point 48 is lower than its body-fixed swing axis 56.

Therefore, by suspending and guiding the thin leaf 12 by the Watt-type approximate linear motion machine n26°28 and using the guide arm 46, the longitudinal axis of the thin leaf 12 is aligned approximately along the gentle curve C in FIG. 2, for example. Even during the desired diagonal movement, the rigid axle 10 does not carry out any kinematically generated natural steering movement.

You can do it.

As already mentioned, the oblique position of the wishbone suspension arm 46 from FIG. 2 has the following effect. That is, during the approach of the vehicle body and the separation of the vehicle bodies, and during the movement of the pivot axis 42 defined by the support pin 30 along the vertical plane b--b, the pivot point 48 on the narrow leaf 12 is moves along a circular orbit 58 concentric with the swing axis 56;
As a result, when approaching the vehicle body, the thin leaf 12 swings counterclockwise around the swing axis 42 parallel to the longitudinal axis of the thin leaf 12.

The narrow leaflet 12 is therefore swung opposite to the forward direction indicated by the arrow in FIG.
Due to the superposition of the movement of the swing axis 42 along b and the movement of the pivot point 48 along the circular path 58, the longitudinal axis of the narrow leaf 12 or the wheel axis 41 remains the same during one-sided vehicle body approach and vehicle body separation movement. Even when the side vehicle approaches or moves away from the vehicle, it bends! It is spatially displaced relative to itself along the IC (FIG. 2) at right angles to the longitudinal center plane dd of the vehicle in plan view.

The support pin 30 of the swinging piece 24 is provided on the Ni beam 2,
Suspension arm 32.3 of Watt type approximate linear motion mechanism 26.28
4, the moment acting on the narrow leaf 12 is supported during acceleration and iWm, and by means of the guiding device fis 146,
It is possible to ensure that the rocking movement of the narrow leaf 12 necessary for the desired diagonal movement takes place around the i-axis edge 42.

Therefore, the support bin 30 does not need to be on a horizontal plane passing through the wheel axis 41. Pivot point 4 forming the intersection of leg sides 4L49
8, the instantaneous center of the rigid axle 10 is also determined at the same time.

For upper axle suspensions with non-steering rigid axles,
The kinematics of the rigid center axle, such as toe-in, camber, starting compensation, braking compensation, lateral force control, and the instantaneous center position of the rigid axle, remain substantially unchanged.

The axle suspension according to the invention is suitable for rigid axles with driven or non-driven wheels. The axle suspension can also be designed as a front axle suspension or as an axle suspension with steerable wheels.

[Brief explanation of the drawing]

FIG. 1 is a diagram of the rear vehicle M suspension system according to the present invention viewed diagonally from above, N2r! 1J is a side view of the rear axle suspension in its manufactured state, and the positions of the elements that serve to guide it toward and away from the vehicle body are also shown in chain lines. DESCRIPTION OF SYMBOLS 10... Rigid axle, 12... Narrow leaf, 24... Rocking piece, 26.28... Suspension arm pair, 32.34... Guide suspension arm, 41...*Wheel axis line, 42... Swing axis, 4
6...Guiding arm.

Claims (1)

[Scope of Claims] 1. Rigid axles supported via springs that do not provide guidance, which are laterally offset in height from each other, are swingable relative to the axle beam, and have one end pivoted to the vehicle body. The guide suspension arms extend in mutually opposite directions at right angles to the wheel axis and define a swing axis for the wheel axis so that the wheel axis is In the case where the guide suspension arms (32, 34) of each suspension arm pair (26, 28) are displaceable in the direction of positive diagonal momentum about the rocking axis, the guide suspension arms (32, 34) are at a height relative to the wheel axis (41). The pivot axis (42) is guided in the vertical plane (b-b) with the pivot piece (24) supported on the rigid axle (10) so as to be pivotable about the shifted pivot axis (42). The oscillation of the wheel axis (41) about the oscillation axis (42) is achieved through an additional guide arm (46) held on the vehicle body side in the direction of a positive diagonal momentum. An automobile axle suspension system characterized by being controlled by. 2. A rocking piece (24
) is swingably supported on a rigid axle (10). 3. Axle suspension according to claim 1, characterized in that a guide arm (46) is provided in front of the rigid axle (10) when viewed in the longitudinal direction of the vehicle. 4. Axle suspension according to claim 1 or 3, characterized in that the guide arm (46) at the same time forms a lateral guide for the rigid axle (10). 5 the guide arm (46) forms a wishbone suspension arm;
or claim 3, characterized in that its tip (48), which is pivotally connected to the rigid axle (10), lies approximately on the longitudinal center axis (dd) of the vehicle in plan view; The axle suspension system according to item 4.