Brakes – With condition indicator – Electrical
Patent
1993-09-29
1995-04-11
Oberleitner, Robert J.
Brakes
With condition indicator
Electrical
B60T 1722
Patent
active
054049709
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention is related to a spot-type disc brake with a friction lining warning device. More particularly, the present invention relates to a device for holding a plug attached to a sensor that senses the wear of the friction lining of a spot-type disc brake, so that the sensor can communicate through the plug to a remote warning indicator plugged thereinto.
BACKGROUND OF THE INVENTION
While it is desirous to provide an auditory or visual indicator in the passenger compartment of a vehicle to warn of brake failure or damage due to excessive wearing of the brake liners, there is considerable difficulty in connecting electrical equipment to the brake assembly because of the confined space in which a disc brake assembly is disposed. One solution is to mount a warning contact plug to a holding angle which is screwed, on its part, to a projection of the brake housing. Anchoring the holding angle has, however, the disadvantage that additional costs associated with machining the projection to provide a threaded bore. Moulding a holding device to the brake housing projection may be uneconomical, for example, when a brake which is already being series manufactured has to be retrofitted with a warning contact plug.
OBJECT OF THE INVENTION
It is, therefore, the object of the invention to fix the warning contact plug to a particular type of brake in a predetermined position on the brake caliper, without carrying out any modifications at the brake housing itself.
SUMMARY OF THE INVENTION
To achieve this object, a holder for the warning contact plug is fastened to a bleeder screw of the brake caliper. The holder is furnished with tongues as a safeguard against the holder rotating relative to the brake caliper and to position the warning contact plug. This mode of fixation offers the advantage of not requiring additional fixing means or attachment hardware at the brake housing.
A particularly compact embodiment is expedient in case only a very restricted mounting space is available. The holder is bent to make the holder more compact.
Preferably, the holder is furnished with spring tongues having apertures for locking the warning contact plug to the holder in a simple manner.
As a preferred embodiment, the holder is made of a one-piece spring metal sheet. By this embodiment, the fabrication of the holder is particularly easy and cost effective.
The invention will be explained in more detail in the following detailed description of the preferred embodiments, making reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings:
FIG. 1 shows a side view of a spot-type disc brake with a holder for a warning contact plug in accordance with the invention;
FIG. 2 shows a cross-section of the holder generally in the direction of arrows 2--2 in FIGS. 3 and 4;
FIG. 3 shows a fragmented top view of the fixing or attaching section of the holder;
FIG. 4 shows a fragment top view of the carrier arm of the holder; and
FIG. 5 shows, in cross-section, another embodiment of the holder.
DETAILED DESCRIPTION 0F A PREFERRED EMBODIMENT
With reference to FIG. 1, a spot-type disc brake is substantially comprised of a brake caliper 1 which is floatingly supported at a brake carrier 2. The disc brake is furnished with a hydraulic actuating apparatus with a brake cylinder 3. The hydraulic actuating apparatus is provided with a bleeder screw 4. Bleeder screw 4 is positioned on a projection 5 of the brake caliper 1. A brake pad 6, which is visible only in part, is furnished with a lining wear sensor (not shown in the drawing). The lining wear sensor has a warning contact connected through an electric cable 7 to a warning contact plug 8. The warning contact plug is fastened to the brake caliper 1 by means of a holder 9.
The holder 9 is illustrated in more detail in FIGS. 2 to 4. It is stamped and shaped from a one piece strip of a spring metal sheet. The holder 9 is composed of a fixing or attaching section 10 and a carrier arm 11. The ends 12 and 13 of the sheet metal strip
REFERENCES:
patent: 3802257 (1974-04-01), Jorenda et al.
patent: 4183012 (1980-01-01), Kimura
patent: 4793448 (1988-12-01), Bolenbaugh et al.
patent: 4850454 (1989-07-01), Korody
Fuchs Elmar
Guttich Holger
Jungmann Hermann
Loffler Josef
Alfred Teves GmbH
Gossett Dykema
Oberleitner Robert J.
Poon Peter M.
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