Disc brake for vehicles having insertable actuator

Details Disc brake for vehicles having insertable actuator Disc brake for vehicles having insertable actuator

1997-10-27

1999-07-27

Graham, Matthew C.

Brakes

Wheel

Axially movable brake element or housing therefor

188 711, F16D 5502

Patent

active

059274450

DESCRIPTION:

BRIEF SUMMARY
The invention relates to a disk brake for road vehicles, having a caliper and which comprises a brake disk with a brake application unit arranged on one side, the application unit having a rotary lever swivellable by an operating cylinder, the rotary lever being capable of acting by means of an eccentric onto a bridge which can be displaced against a spring force in the direction of the brake disk has at least one adjusting spindle provided with a pressure scheme.
In the case of disk brakes of the above-mentioned type (German Patent Document DE-OS 40 32 886), a brake application device, which is equipped with a rotary lever which can be acted upon by an operating cylinder, is provided inside the rearward part of a caliper comprising a brake disk, which application device has a bridge which carries two adjusting spindles having pressure pieces and is slidably supported on the caliper. The end of the rotary lever which eccentrically acts upon the portion of the bridge facing away from the brake disk is supported on the rearward end of the caliper by means of slide bearing or roller bearing elements. The rearward section of the caliper is constructed as a separate housing which can be screwed together with the caliper along a separating line. During the operation of the brake, the brake response forces are introduced in a rearward manner into the screwed-on housing section which can cause problems concerning the screwed connection, the stability and the sealing, particularly during the service lives required in the case of disk brakes of the concerned type. Problems of the above-mentioned type may also occur in the case of disk brakes which are constructed with only one adjusting or pressure spindle.
Based on the above, it is the object of the invention to further develop a disk brake of the above-mentioned type such that the brake response forces can be introduced into the brake caliper without any problems. In particular, sealing areas existing at the caliper must be completely unaffected by the braking or brake response forces in order to ensure the required operational reliability during long service lives of the brake system.
This object is achieved according to preferred embodiments of the present by providing a disk brake of the above mentioned type, wherein
a) the caliper is constructed in one piece such that the section of the caliper receiving the application unit is largely closed in a rearward area facing away from the brake disk, with the exception of an opening for the access of the operating cylinder, and
b) the application unit can be inserted as a preassembled unit into the caliper through the opening facing the brake disk when the caliper is removed from the brake disk.
Because of the one-piece design of the caliper, which in a cost-saving manner may be constructed as a cast part, a direct transmission of the braking forces into the caliper is permitted since the rearward area, which faces away from the brake disk, of the caliper receiving the application unit is essentially closed with the exception of the through-grip opening for the operating cylinder. The application unit, including all its components, can be introduced as a preassembled unit when the caliper is removed from the brake disk through the opening facing the brake disk. After the introduction of the application unit, this opening of the caliper can preferably be closed by a closing plate which, in the case of a two-spindle brake disk construction, is penetrated in a sealing manner by the pressure pieces on the forward ends of the adjusting spindles. The application unit can be constructed as a preassembled unit by means of simple holding or clamping elements. Its position inside the section of the caliper acting as the housing is determined by the supporting roller which is supported on the interior side on the rearward wall section of the caliper and, facing the brake disk, is determined by the pressure spring which tensions the application unit in a rearward manner and is supported on the closing plate.
Other objects, advan

REFERENCES:
patent: 4681194 (1987-07-01), Tsuruta
patent: 4693341 (1987-09-01), Drott
patent: 5433298 (1995-07-01), Paul
Perrot, Mechanische Gleitsattelbremsen, Typ 1000 V-G/ 1600 V-G/2000 V-G.
MAN Nutzfahrzeuge Aktiengesellschaft, Lucas Scheibenbremse D3, Reparaturanleitlung p. 102, 1992.
MAN Perrot Scheibenbremse 1000 V -G, Reparaturanleitung, p. 103, 1994.
Montage Im Maschinenbau, VEB Verlag Technik Berlin, 1974, 1978.

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