Brakes – Wheel – Axially movable brake element or housing therefor
Patent
1991-06-06
1993-08-24
Oberleitner, Robert J.
Brakes
Wheel
Axially movable brake element or housing therefor
188 7331, 188264AA, F16D 55224, F16D 6502
Patent
active
052380904
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a spot-type disc brake, in particular for automotive vehicles.
BACKGROUND OF THE INVENTION
A spot-type disc brake of a kind under consideration is known from the German printed and examined patent application No. 2,804,808 such a spot-type disc brake is provided with two brake carrier arms positioned at a distance from each other in the direction of a secant in respect of the brake disc with the movement of two brake shoes guided by the brake carrier arms. An external stem of the brake housing which urges the indirectly actuated brake shoe against the brake disc has a circular opening. The external stem is, thus, divided into two in the secant direction with two fist fingers being disposed symmetrically in respect of an axis of symmetry. In the event of an actuation of the brake, the individual fingers are expanded in spite of a material accumulation, so that a tangentially inclined wear of the external brake shoe is possible.
SUMMARY OF THE INVENTION
It is the object of the recent invention to improve an external stem of a brake housing. In particular, a tangentially inclined wear of the external brake shoe is to be avoided and an axial mounting space for the external stem of a brake housing is to be reduced.
This object is achieved according to the characteristic features of the present invention, because the external stem of the fist-type brake housing has a closed design, so that the clearance provided for a tool which is disposed between the state-of-the-art fist fingers of the external stem is filled up with cast metal. In this way, the radial length of the external stem can be reduced, on one hand, and the axial extension of the external stem as a whole can be diminished, on the other hand. In addition, a noise reduction is advantageously, attained when the brake is being operated. The two fingers of the external stem are, thus, connected to each other along the lines of an integrated design.
In one advantageous embodiment of the present invention the lower edge of the external stem extends at a constant radial distance from the disc-shaped contour of the brake disc. Advantageously, a uniform distribution of the pressure exerted on the brake disc is achieved over the circumference of the brake shoe, and this leads in an advantageous manner to a uniform distribution of cast metal for the external stem.
Ribs running in circumferential direction on the outer side of the external stem advantageously serve-to dissipate frictional heat.
A lifting-out tooth projecting in the secant direction makes a catch beneath one of the brake carrier arms, so that a lifting-out of the caliper outwardly in radial direction is, advantageously, prevented.
The brake shoes are supported in the radial direction at the bearing elements outside the circumference of the brake disc, so that, advantageously, the brake carrier is designed solid with the steering knuckle as an integrated steering knuckle. This allows an easy assembly-line mounting, since upon mounting of the brake disc the brake shoes are adapted to be suspended on the integrated steering knuckle and thereupon the brake housing can be fitted from the top over the brake disc and the brake shoes and be screwed or bolted to the steering knuckle.
In an advantageous manner, radially outwardly directed projections of the brake carrier arms engage grooves provided in the axial ends of the brake shoe, so that the frictional force which occurs at the brake shoe is advantageously transmittable to both brake carrier arms at least in the presence of more elevated brake contact forces, so that the force is distributed to two arms.
Advantageously, the brake housing is supported in the range of its bridge section at tangential ends of the external brake shoe in the secant direction, so that, on one hand, the brake housing cannot move outwardly in circumferential direction and, on the other hand, the brake shoe is reinforced in circumferential direction by the bridge section which is positioned in between.
Identical brake sho
REFERENCES:
patent: 3081843 (1963-03-01), Dotto et al.
patent: 3251436 (1966-05-01), Afanador et al.
patent: 3388774 (1968-06-01), Burnett
patent: 3455417 (1969-07-01), Takata
patent: 4219106 (1980-08-01), Lupertz et al.
patent: 4220223 (1980-09-01), Rinker et al.
patent: 4225017 (1980-09-01), Op den Camp
patent: 4591028 (1986-05-01), Hagiwara et al.
patent: 4709789 (1987-12-01), Czich et al.
patent: 4754856 (1988-07-01), Villata
patent: 4776435 (1988-10-01), Morita
patent: 4809825 (1989-03-01), Oltmanns, Jr. et al.
patent: 5002160 (1991-03-01), Weiler et al.
Ballato Josie A.
Lewis J. Gordon
Oberleitner Robert J.
Seitter Robert P.
LandOfFree
Disc brake housing with continuous outside circumferential edge does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Disc brake housing with continuous outside circumferential edge , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disc brake housing with continuous outside circumferential edge will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-823651