DE4139725A1

DE4139725A1 - Double wheels for motorcycles - involve fluid activated by spring pressure and connecting both fork arms producing even wheel pressures on ground in each travel position

Info

Publication number: DE4139725A1
Application number: DE19914139725
Authority: DE
Inventors: Kurt Dr Med Hoppe
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-12-02
Filing date: 1991-12-02
Publication date: 1993-06-03

Abstract

Telescopic arms carry a wheel fork, a wheel axis with a running wheel, and a lower inner telescopic arm is sprung which means that each wheel of the pair is individually sprung. An alternative arrangement inside of the telescopic arms is to use pivot arms. In order to achieve an equal transmission of spring pressure in each drive position (inclination when negotiating curves) on each wheel, the upper stops are not fixed in the upper telescopic tube, but consist of sliding bodies in this tube and the spaces above them are filled with fluid (1), e.g. brake oil and communicate with each other via a tubular connection (2). USE/ADVANTAGE - For motorcycles, to provide greater safety when aquaplaning occurs and when negotiating curves and inclined surfaces.

Description

Bei Automobilen wurden Zwillingsräder an den Vorderachsen vor Jahren mit Erfolg bei Aquaplaning versucht. Zwillingsräder an Einspurfahrzeugen müßten auch solche Vorteile, u. a., bringen. Da bei Kurvenfahrten dieser Fahrzeuge aber starke Schrägneigungen nötig sind, würde das in der Kurve außenliegende Rad je nach Neigung der Maschine einen immer geringeren Druck auf den Boden ausüben und könnte gar vom Boden abheben, wenn beide Zwillingsräder auf einer Achse liefen. Deshalb muß jedes Rad seine eigene abgefederte Achse besitzen (Fig. 1). Dies ist der wesentlichste Punkt dieser Idee.In automobiles, twin wheels on the front axles were tried successfully in aquaplaning years ago. Twin wheels on single-track vehicles should also bring such advantages, among other things. However, since these vehicles require strong inclinations when cornering, the wheel on the outside of the curve would exert less and less pressure on the ground, depending on the inclination of the machine, and could even lift off the ground if both twin wheels were running on one axle. Therefore each wheel must have its own sprung axle ( Fig. 1). This is the main point of this idea.

Die beste Lösung wäre, wenn in jeder Fahrlage jedes einzelne Rad den gleichen Druck auf den Erdboden ausüben würde. Dies wird entweder durch eine Flüssigkeit erreicht (Fig. 7), die von einem Teleskoprohr zum anderen durch eine rohrartige Verbindung fließen kann, denn in Flüssigkeiten pflanzen sich Drücke gleichmäßig fort. Der gleiche Effekt kann, wie in Fig. 8 gezeigt, auch durch eine starre mechanische Verbindung erreicht werden. Hier greift ein mittig liegendes Zahnrad (Z) in eine Zähnelung im inneren oberen Teleskoprohr ein, und zwar durch eine kleine zum Zahnrad gerichtete Öffnung im oberen äußeren Teleskoprohr. Im Prinzip erreichen beide Lösungen den gleichen Zweck, nämlich die in jeder Fahrlage stets gleichen Raddrücke jedes der beiden Zwillingsräder auf den Erdboden.The best solution would be if every single wheel exerted the same pressure on the ground in every driving position. This is achieved either by a liquid ( Fig. 7), which can flow from one telescopic tube to another through a tube-like connection, because pressures propagate evenly in liquids. The same effect can, as shown in Fig. 8, also be achieved by a rigid mechanical connection. Here, a centrally located gear (Z) engages a toothing in the inner upper telescopic tube, namely through a small opening facing the gear in the upper outer telescopic tube. In principle, both solutions achieve the same purpose, namely the wheel pressures of each of the two twin wheels on the ground, which are always the same in every driving position.

Es ergeben sich folgende Vorteile dieser Konstruktion:The advantages of this construction are as follows:

1. Greater safety in aquaplaning ( Fig. 1 and 7 and 8);
2. better safety when cornering ( Fig. 3 and 7 and 8);
3. the same on an inclined roadway ( Fig. 4);
4. safer and more comfortable on uneven roads ( Fig. 5);
5. easier steering movements when stationary and slow travel compared to a single wheel with the necessary more voluminous tires, because both twin wheels roll on the ground during a steering movement ( Fig. 6).

Bei einer Ausführung der Radaufhängungen mit Schwingarmen statt der Teleskoprohre ergeben sich im Prinzip gleiche und nur abgewandelte Bauarten, in Fig. 2 nur angedeutet.When the wheel suspensions are designed with swing arms instead of the telescopic tubes, in principle the same and only modified designs result, only indicated in FIG. 2.

Claims

1. "Twin wheels" or "double wheels" on single-track vehicles, for. B. on motorcycle front or rear wheel forks, characterized in that
that each telescopic arm (Fig. 1) carries a wheel fork a wheel axle with a wheel and that the lower inner telescopic arm (T₂, Fig. 1 and 8) in the outer telescopic arm (T₁, Fig. 1 and 8) is cushioned, and that, that each twin wheel is cushioned by itself;
In the case of a design with swing arms instead of the telescopic tubes, there are similar and in principle the same types of construction.

2. The following additional equipment is required to ensure that the spring pressures are transferred evenly to every wheel of the twin wheels in every driving position (inclination when cornering):

a) the upper stops of the springs in the upper telescopic tubes are not fixed, as shown in Fig. 1, but they consist of bodies sliding in these tubes (K), and the spaces above are filled with liquid - e.g. B. brake oil - filled and communicate with each other through a tubular connection, hatched in Fig. 7; the desired result is that the pressures of both wheels on the road are always the same, regardless of the inclination of the machine, because pressures propagate evenly in liquids;
b) in order to obtain this uniform transmission of the spring pressures in every position of the vehicle on each wheel of the twin wheels - as shown under a - mechanical transmissions can also be used, e.g. B. by a central gear (Z) and an internal toothing of the upper inner telescopic tubes, in which the gear can engage ( Fig. 8); this requires a small, inward opening in the upper outer telescopic tube; the result of this design corresponds to that described under a.