FR2690669A1

FR2690669A1 - Horse drawn vehicle steering device - utilises two pivoting axles, one for each front wheel.

Info

Publication number: FR2690669A1
Application number: FR9205673A
Authority: FR
Inventors: Ouwerling Gerardus Cornelis
Original assignee: OUWERLING GERARDUS
Current assignee: OUWERLING GERARDUS
Priority date: 1992-04-30
Filing date: 1992-04-30
Publication date: 1993-11-05

Abstract

The horse drawn vehicle has a chassis, a shaft, two rear wheels (3,4) and two front wheels (1,2) mounted on a steering shaft. There are two pivoting axles , one for each front wheel. In the case of the kingpin the polygon defined by the quadrilateral joining the points of wheel contact with the ground is variable , and more reduced than the turn of the wheels with the ground and shorter. With a worn axle the polygon stays quasi invariable which is important for increasing stability in the turning of the wheels. ADVANTAGE - Ensures stability during turning.

Description

L'orientation des roues concernant les uéhicules hippomobiles est traditionellement obtenue par le piuotement de l'essieu auant autour d'un axe uertical passant par son milieu (essieu à cheuille ouurière) laquelle n'assure pas toujours une stabilité souhaitée (planche 1/3). The orientation of the wheels relating to horse-drawn vehicles is traditionally obtained by the canting of the front axle around a uertical axis passing through its center (axle with a fluff) which does not always provide the desired stability (plate 1/3 ).

Le dispositif selon l'inuention permet de rémedier à cet inconuénient par l'utilisation de deux axes de piuotement, un destiné à chaque roue-auant: direction à essieu brisé (planches 2/3 et 3/3). The device according to the invention makes it possible to remedy this inconvenience by the use of two axes of trampling, one intended for each wheel-bearing: steering with broken axle (planks 2/3 and 3/3).

En effet, dans le cas de la cheuille ouurière, le polygone de sustentation defini par le quadrilatère joignant les points de contact des roues auec le sol, est de surface uariable, et d'autant plus réduit, que le uirage des roues auec le sol est plus court (dans le cas où l'essieu auant serait perpendiculaire à l'essieu arrière, le quadrilatère se réduirait à un triangle ). Indeed, in the case of the wallet, the support polygon defined by the quadrilateral joining the points of contact of the wheels with the ground, is of variable surface area, and all the more reduced, as the spinning of the wheels with the ground is shorter (in the case where the front axle is perpendicular to the rear axle, the quadrilateral would be reduced to a triangle).

Auec un essieu brisé le polygone de sustentation reste quasiment inuariable, ce qui est une condition importante pour l'augmentation de stabilité dans les uirages. De plus on uoit sur les dessins que la réaction produite par le choc d'un obstacle auec la direction à essieu brisé est beaucoup plus faible que celle agissant dans un cas analogue sur la cheuille ouurière (La roue 2 rencontrant un obstacle, produit un effort F d'où couple Fd' < Fd); elle peut même être annulé par l'inclinaison des axes de piuotement. L'effort à effectuer pour braquer les roues est également plus faible. With a broken axle, the support polygon remains almost invariable, which is an important condition for increasing stability in turns. In addition, it can be seen in the drawings that the reaction produced by the impact of an obstacle with the broken axle steering is much weaker than that acting in a similar case on the wallet (The wheel 2 encountering an obstacle, produces an effort F hence the couple Fd '<Fd); it can even be canceled by the inclination of the axes of trampling. The effort required to turn the wheels is also lower.

Les planches 1/3, 2/3 et 3/3 représentent, uus d'en haut,les chassis des véhicules hippomobiles dont:
1= roue auant-gauche
2= roue auant-droite
3= roue arrière-gauche
4= roue arrière-droite
ss= angle de braquage de la roue auant-droite
d= angle de braquage de la roue auant-gauche
0= centre instantané de rotation
EE= essieu
P, P1, P2, P3 = axes de pivotement auec chassis
T= timon ou Brancard,
L1,L2= leuiers d'accouplement
B= barre d'accouplement,
R1,R2= rotules
OR= orifice, destiné au passage de T
CH= chassis
F= effort produit par la roue 2 rencontrant un obstacle
d, d'= distance axe piuotement-centre roue. Plates 1/3, 2/3 and 3/3 represent, uus from above, the chassis of horse-drawn vehicles including:
1 = front-left wheel
2 = front right wheel
3 = rear wheel left
4 = rear wheel right
ss = steering angle of the front right wheel
d = steering angle of the front-left wheel
0 = instant center of rotation
EE = axle
P, P1, P2, P3 = pivot axes with chassis
T = drawbar or stretcher,
L1, L2 = coupling hoses
B = tie rod,
R1, R2 = ball joints
OR = orifice, intended for the passage of T
CH = chassis
F = force produced by wheel 2 encountering an obstacle
d, d '= distance between the center line and the wheel center.

Claims

Request 1:

Horse-drawn vehicle comprising a chassis, a drawbar, two rear wheels (3,4), two front wheels (1,2) mounted on a steering axle, characterized in that the steering axle is broken and in that each front wheel has its own axis of trampling.