Clamping device of a disc brake, especially for use with heavy c

Details Clamping device of a disc brake, especially for use with heavy c Clamping device of a disc brake, especially for use with heavy c

1996-06-21

1998-10-13

Oberleitner, Robert J.

Brakes

Wheel

Axially movable brake element or housing therefor

188 727, 188 729, F16D 6516, F16D 6556

Patent

active

058198849

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE INVENTION

The invention relates to a clamping device of a disc brake, especially for use with heavy commercial vehicles, comprising axis for applying a brake pad to a brake disc, the plunger, extending at an angle to the transverse axis to compensate for lining wear, and transmit the torque for effecting an adjustment to compensate for lining wear.
A device of this kind has been known from DE 42 12 406 A1.
It is the object of the invention to allow, in connection with a device of the kind mentioned, a particularly simple and reliable assembly of the, or each, eccentric and the structural elements coacting therewith.
According to the present invention, the object is achieved in that the pin forms part of a safety mechanism by which the roll body is prevented from inadmissibly moving in the direction of the transverse axis with respect to the eccentric. The pin therefore, in addition to its previous function to form part of an angular drive between the eccentric and the adjusting member, has an additional function as a retaining member, which provides for a simplified overall construction.
According to another aspect, the invention relates to a clamping device of a disc brake, especially for use with heavy commercial vehicles, comprising axis for applying a brake pad to a brake disc, one eccentric for displacing the plunger, and extending at an angle to the transverse axis to compensate for lining wear, other one of the members for transmitting torques.
A clamping device having an angular drive of the kind mentioned above has been known from DE-A-42 04 307 wherein two radially projecting pins are fixed to the rotary body and a drive lever is arranged on the adjusting member, the outer contour of which is similar to a toothing having three teeth and two gaps. Each of the gaps is engaged by one of the two pins, respectively, fixed to the rotary member. Thereby the adjusting member is connected to the rotary member by a kind of mangle gear which has been known since ancient times for angular drives and which, compared to modern toothings, has the drawback that there is only point contact between pins and teeth resulting in high surface pressures that cause wear. Wear, however, is particularly undesirable in an angular drive of the kind discussed above, for it results in that, in the course of time, the brake slack where an adjustment takes place becomes increasingly larger.
The same applies in respect of the clamping device known from DE-A-40 20 485 which also belongs to the afore-described kind comprising an angular drive. Therein, a pin extending radially beyond a rotary member is carried on the latter such that it is pivotable about an axis crossing the axis of the rotary member. Again, a lever is fixed to the adjusting member that is to rotate upon rotations of the rotary member, the lever having a recess into which the pin extends. It cannot be avoided here either that the pin contacts the edge of the associated recess only pointwise, at least, when the rotary member and the adjusting member occupy certain positions.
In another clamping device having been known from DE-A-40 32 886 and belonging as well to the afore-described kind comprising an angular drive, the pin fixed to the rotary member has a spherical head which is embraced in a fork-like manner by a lever mounted to the adjusting member. In the most favorable case it is possible here, however only in the area of a center position of the pin with respect to the lever, to achieve a line contact between pin and lever.
More favorable contacting conditions are achieved with a clamping device known from DE-U-92 08 699, in which also a rotary member rotatable about a first axis for actuating a brake is connected to an adjusting member rotatable about a second axis to compensate for lining wear, the two axes intersecting at a right angle. The two members directly engage each other via bevel gear toothings provided on each of the members. The two bevel gear toothings contact each other at least along one contact line in every

REFERENCES:
patent: 5353896 (1994-10-01), Baumgartner et al.
patent: 5433298 (1995-07-01), Antony et al.
patent: 5443141 (1995-08-01), Thiel et al.
patent: 5449052 (1995-09-01), Macke et al.
patent: 5520267 (1996-05-01), Giening et al.
patent: 5568845 (1996-10-01), Baumgartner et al.
patent: 5582273 (1996-12-01), Baumgartner et al.

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