Land vehicles – Wheeled – Occupant propelled type
Patent
1997-02-27
1999-08-03
DePumpo, Daniel G.
Land vehicles
Wheeled
Occupant propelled type
280279, 280124104, 280124105, B62K 2508
Patent
active
059314877
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY
The invention relates to a brake dive compensation device for the front wheel suspension of a single-track (two-wheeled) vehicle.
Front wheel suspension systems for single-track vehicles are usually designed with telescopic forms, pushed swinging arms, or pulled swinging arms. By contrast with designs with pushed swinging arms and telescopic forks, a drawn swinging arm has the advantage that the suspension responds better to uneven ground, since the direction of the force components which arise when driving over uneven ground, in the case of drawn swinging arms, lie approximately in the direction of movement of drawn swinging arms, while with pushed swinging arms or telescopic forks the force components occur obliquely to the direction of movement of the pushed swinging arms or telescopic forks respectively.
The disadvantage of the design with drawn swinging arms, however, resides in the fact that the spring suspension dives especially deep when the front axle is braked. In the case of telescopic forks and pushed swinging arms, this effect is less strongly marked, especially since pushed swinging arms counteract the dive effect.
DE 38 33 880 A1 already relates to systems for preventing diving. FIGS. 1, 2, 4 and 5 show arrangements with drawn swinging arms, of which FIGS. 1, 2 and 4 show arrangements with a rim brake, and FIG. 5 an arrangement with a drum brake. The explanations for FIG. 5 do not, however, allow for the functional method of this design to be appreciated.
The invention is based on the task of improving a brake dive compensation arrangement for a front wheel suspension system of a single-track vehicle in such a way that reliable compensation is achieved for the diving forces which occur during braking, without the spring travel and the spring characteristics being restricted in the process.
This task is resolved in the form of a brake dive compensation device according to the present invention.
In the design according to the invention, the brake carrier is not supported on the swinging arms but on the wheel guide carrier, with the result that the force which is exerted by the wheel guide carrier due to the braking procedure is conducted into the wheel guide carrier, and the linkage combination of swinging arm, wheel guide carrier, brake carrier, and thrust rod always creates a resultant force in the wheel guide carrier which precisely counteracts the dive force because of the wheel load which occurs during braking.
As a result of this, spring suspension comfort is fully retained even during braking, and, in addition to this, so too is the run-on of the front wheel, which guarantees constant steering stability.
For preference, the thrust rod, with the vehicle under static operational loading conditions, points at approximately right angles to a radial central axis of the brake carrier.
The term "static operational loading conditions" is understood to mean the state under which the dead weight of the vehicle and the weight of a driver, for whom the suspension has been designed, take effect on the suspension of the front wheel, either at a standstill or at a constant speed. The drawn swinging arms with the spring element then adopt a position in which the spring reserves are approximately equal in both directions. This position is also designated as the zero position.
When the thrust rod, with the vehicle under static operational load conditions, is pointing approximately tangential, the device fluctuates about the tangential position as the load is imposed on the suspension and then relieved, with the result that, to a large extent, linearity can be guaranteed for the force which is to be applied to compensate for brake dive.
According to another embodiment, provision can be made for several jointed connection points on the wheel guide carrier for optional securing of the thrust rod. In this way, the angle alignment can be slightly changed, with the result that adaptation is possible, for example, to drivers of differing sizes and weights. Depending on size, seat height,
REFERENCES:
patent: 3694004 (1972-09-01), Siebers
patent: 3989261 (1976-11-01), Kawaguchi
patent: 4180280 (1979-12-01), Doveri
patent: 4437678 (1984-03-01), Schultz
patent: 4480711 (1984-11-01), Satoh et al.
patent: 4520892 (1985-06-01), Satoh
patent: 4776609 (1988-10-01), Pan et al.
Duwel Norbert
Koppelberg Gunter
LandOfFree
Brake dive compensator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Brake dive compensator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Brake dive compensator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-842181