Brakes – Wheel – Axially movable brake element or housing therefor
Patent
1995-11-22
1997-09-09
Oberleitner, Robert J.
Brakes
Wheel
Axially movable brake element or housing therefor
192111A, 74 12, 188 729, F16D 6516, F16D 6556
Patent
active
056646461
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE INVENTION
The invention relates to a disc brake, particularly for vehicles, having a stationary housing, at least one friction or brake lining which, when the brake is actuated, can be displaced with respect to the housing, a lever device with a shaft which can be rotated about a first axis fixed with respect to the housing, the shaft carrying an eccentric, and an actuating lever or rotating lever being fastened to the shaft in such a manner that it extends essentially perpendicularly to the first axis. As a result of the rotation of the shaft about the first axis, the brake can be actuated which is triggered by the pressure on the rotating lever, a pressure member or eccentric follower, which can be displaced within the housing along a second axis which extends essentially perpendicularly to the first axis. The follower rests with its first end on the eccentric and with its second end acting with respect to the brake lining: means are provided for adjusting and absorbing wear which increases the distance separating the first axis from the second end of the follower as a function of the wear of the brake lining.
A disc brake of this type is described, for example, in French Patent Document FR-A-2,548,309.
Disc brakes of this or a comparable type are known to a person skilled in the art; thus, with respect to the problem of providing a simple construction while the weight is low and the size is small.
With respect to all efforts of achieving these objects, the advantages of the simple construction and of the low weight or weight reduction, are countered by the requirements of a sturdy construction and a reliable operation.
Based on the above, it is an object of the present invention to provide a simple brake of the discussed type which has small dimensions and is nevertheless resistant in order to be suitable for being used in commercial vehicles.
For achieving this object, the brake according to the invention is distinguished by the following characteristics:
The eccentric has two bearing sections arranged on either side of the rotating lever; a nut with a central threaded bore as well as two essentially semicylindrical lateral bearing shells which are used for receiving the corresponding bearing sections of the eccentric; engages the nut, while a second end of the screw forms the second end of the eccentric follower or the pressure member; and and of the nut whereby the eccentric follower or pressure member can be extended.
According to a preferred embodiment of the invention which contributes to obtaining a brake of very small dimensions, the following characteristics are provided:
The rotatable lever arrangement with the eccentric is manufactured in one piece; condition of the brake lining over the threaded bore situated in the center, on the side facing the shaft; and for receiving the screw if this screw extends beyond the central threaded bore.
Preferably, the disc brake is constructed such that a bore is entered into the shaft in the direction of the first axis. The means of adjusting the wear, at least on one side, have a first pinion which is situated in this bore and is connected with the shaft in a partially rotatable manner, as well as a second pinion which engages with the first pinion and extends in the screw along the second axis. In which case, the second pinion is rotatably connected with this screw, and the screw can be displaced with respect to the second pinion along the second axis.
In order to permit a manual adjusting of the brake, particularly in the case of an exchange of the brake lining, the arrangement is such that the first pinion contains a spindle which extends beyond the bore of the shaft through the housing in such a manner that a torque can be applied from outside the housing.
Furthermore, the second pinion and the screw are rotatably connected by a kinematic chain with the shaft of the rotatable lever device. The kinematic chain contains a free wheel and a torque limiting device, and the free wheel has an outer cage and an inner cage which a
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Bejot Philippe
Boluda Jose Manuel Vila
Busquets J. Ruiz
Monteillet Jean Claude
Oberleitner Robert J.
Schwartz Chris
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