Brakes – Wheel – Axially movable brake element or housing therefor
Patent
1994-08-12
1995-08-08
Oberleitner, Robert J.
Brakes
Wheel
Axially movable brake element or housing therefor
403 22, F16D 6514
Patent
active
054390842
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for guiding a sliding caliper for a disk-brake, comprising: screw in a tapped hole made in the support in order to securely fasten it to the latter; a small clearance by the screw and axially blocked between the support and the screw head; carrier about its longitudinal axis, and interacting with flats made on the outer surface of this carrier.
Devices of this type have been used for a long time in the prior art, as the patents U.S. Pat. No. 4,475,633 and U.S. Pat. No. 4,641,730, for example, show.
However, the means for rotationally blocking the carrier in the known systems conventionally consist of a double fork each end of which rotationally blocks a corresponding carrier.
Now, although the known systems of this type give entire satisfaction for disk-brakes comprising two similar carriers relatively close to one another, the use of a double fork becomes impossible in brakes with a single carrier, or ones in which the carriers are structurally different and/or far away from one another.
Furthermore, it has appeared that for brakes subjected to high stresses, and especially for brakes of industrial vehicles of a considerable size, rotationally blocking the carrier alone is not sufficient for guaranteeing the absence of stresses on the guide device, either upon assembly or in operation.
In this context, the object of the invention is to propose a device for guiding a sliding caliper for a disk-brake, arranged so as to reduce the stresses therein.
To this end, the device of the invention is essentially characterized in that the flats are made at the end of the carrier which is turned towards the support and in that the first blocking means comprise: receives the screw; small clearance in the bore of the support, and an internal profile forming two parallel support surfaces slidingly receiving the flats of the carrier, and support.
By virtue of this structure, not only the end of the carrier which is in the vicinity of the support is rotationally blocked, and with it the entire carrier, and allowed to slide inside the internal profile of the ring in order to take up all the manufacturing tolerances, but this end is further held in a direction perpendicular to the support surfaces of the internal profile of the open ring, which guarantees that the carrier always tends to assume an optimum position parallel to the screw instead of adopting an oblique position, which generates stresses.
Moreover, preferably, the second blocking means comprise an axial and/or radial extension engaging in a complementary cavity, either one of the extension and the cavity belonging to the open ring and the other to the support, a stud carried by the open ring constituting, for example, a possible axial extension.
Other advantages of the invention will emerge clearly from the description thereof given hereafter, by way of an indication and with no limitation, with reference to the appended drawing in which:
FIG. 1 is a longitudinal sectional view of a guide device in accordance with the invention;
FIG. 2 is a sectional view of this device, along the line II--II of FIG. 1;
FIG. 3 is a view analogous to FIG. 1, illustrating a second embodiment;
FIG. 4 is a view analogous to FIG. 2, illustrating this second embodiment;
FIG. 5 is a view analogous to FIGS. 1 and 3, illustrating a third embodiment; and
FIG. 6 is a view analogous to FIGS. 2 and 4, illustrating this third embodiment.
The device of the invention is designed in order to optimize the guidance of a sliding caliper in a disk-brake.
This device firstly comprises a support 1, a screw 2, and a carrier 3 on which a brake caliper 4 slides.
The screw 2 has a head 2a via which it can be engaged by a tool enabling it to be screwed into a tapped hole 1a of the support and to be firmly and securely fastened to the latter.
The carrier 3 essentially adopts the shape of a hollow cylinder of revolution of axis 3a and is traversed with a small clearance, along its length, by the screw 2 whose head 2a bears against the support 1 and thus keeps it axial
REFERENCES:
patent: 611815 (1898-10-01), Miller
patent: 1088515 (1914-02-01), Bazin
patent: 1332268 (1920-03-01), Nainka
patent: 3610659 (1971-10-01), Gerarde
patent: 4475633 (1984-10-01), Gerard et al.
patent: 4641730 (1987-01-01), Lombardi et al.
patent: 4762206 (1988-08-01), Arimitsu
patent: 4854423 (1989-08-01), Evans et al.
Bendix Espana S.A.
McCormick Jr. Leo H.
Oberleitner Robert J.
Palguta Larry J.
Poon Peter M.
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