Brakes – Wheel – Axially movable brake element or housing therefor
Patent
1988-05-31
1989-08-01
Halvosa, George E. A.
Brakes
Wheel
Axially movable brake element or housing therefor
188264G, 192113A, 411 87, 411 90, 411969, F16D 6514
Patent
active
048527009
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a spot-type disk brake comprising actuator with a piston, actuable by the piston, and is actuable by displacement of the floating caliper, and side of the brake disk and for supporting the floating caliper on the brake support on the second side of the brake disk, the slide guides being formed in each case by axis of the brake disk, brake and engages into the groove and pin co-operating with each other from soiling and is protected by a heat shield arranged between it and the brake disk.
In disk brakes of this type the guide bodies may be arranged either on the floating caliper or on the brake support. Accordingly the threaded pins are screwed into the brake support or the caliper In both cases the threaded pins are screwed in to such an extent that together with the associated guide body they provide an almost play-free slide guide. In this screwed-in position the threaded pins must be secured so that they do not unintentionally become loose due to vibrations.
To set the necessary guide play and the exact movement direction of the floating caliper with respect to the brake support both these components are held in a desired position by clamping means. The threaded pins are then mechanically screwed in until the screw-in torque required for this purpose exceeds a predeterm-ined value which shows that the guide is free of play. Finally, the threaded pins are turned back a predetermined angular amount to give the desired small guide play.
In a known disk brake of the aforementioned type (DE-GM No. 8,601,094) the threaded pins are secured directly at their threads. For this purpose generally chemical substances are used which are applied in microcapsules to the threads. On assembly the microcapsules are squashed so that the chemical substances can react, the inner and outer threads thereby being stuck to each other.
It has been found that in the known disk brake according to the preamble the friction between the threaded pins and the threaded bores receiving them fluctuates during the squashing of the microcapsules to such an extent that it is not possible to adjust the guide play with the desired accuracy with the aid of the screw-in torque.
In the known brake according to the preamble the heat shields are each secured to a collar which is secured around the associated guide body on the floating caliper. This type of mounting requires an additional assembly expenditure for each of the heating shields.
The invention is therefore based on the problem of reducing the assembly expenditure involved with the securing of the threaded pins and attachment of the heat shields.
The problem is solved according to the invention in a spot-type disk brake of the type described at the beginning in that anti-rotation lock which comprises a mounting member secured to the brake support and cooperating with the pin to prevent accidental rotation thereof, and threaded pin is carried by the mounting member.
The use of anti-rotation locks reliably secures the threaded pins against rotation. Each mounting member is at the same time a supporting component for the associated heat shield which is either secured as separate component to the mounting member, for example fixedly welded, or is made in one piece with the mounting member, for example by deep drawing. In both cases by securing a mounting member on the associated threaded pin and on the brake support the associated heat shield can be brought into position without any further assembly work.
In a preferred embodiment of the invention the mounting member comprises a recess which is fitted onto a polygonal head of the associated threaded pin and is thereby deformed complementarily to the polygonal head. The recess may be formed in a pot-shaped depression of the mounting member which is pressed into a widening of a threaded bore receiving the associated threaded pin.
Preferably the or each mounting member is angled and bears on an end face and a side face of the brake support facing the brake disk.
The spot-type disk brake according to the invention can al
REFERENCES:
patent: 3166159 (1965-01-01), Burnett
patent: 4572336 (1986-02-01), Smith
patent: 4775033 (1988-10-01), Heibel
Halvosa George E. A.
Lucas Industries Public Limited Company
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