Power plants – Pressure fluid source and motor – Pulsator
Patent
1993-03-11
1994-07-26
Look, Edward K.
Power plants
Pressure fluid source and motor
Pulsator
91376R, 92 98R, B60T 1300
Patent
active
053318137
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a brake actuator assembly for motor vehicles, comprising
a pneumatic brake pressure booster which includes a rear housing portion with a tubular connecting piece projecting to the rear and is insertable into an opening formed in the splashboard of a motor vehicle,
a mounting plate adapted to be fastened to the splashboard so as to close the opening, and
a pedal arrangement including support blocks which are disposed near the tubular connecting piece.
As mechanized mounting (by robots) is practiced ever more in the final assembly of motor vehicles, demand has arisen for suppliers of subcomponents to provide those component parts combined with adjacent structural elements in subassemblies in a condition which permits their automatic final assembly in a way to dispense with subsequent adjustment operations.
In respect of brake components, this means that the brake manufacturer has to supply a previously assembled and adjusted aggregate for actuation of the brakes, with the vehicle manufacturer then merely looking after the mechanical attachment and hydraulical connection to the brakes.
EP 0 348 273 A1 discloses a brake actuator assembly of the kind specified initially with which the mounting plate is made in one piece with a front housing portion of the brake pressure booster, either by pressing or deep drawing, and two support blocks for the brake and clutch pedals are welded to the mounting plate at a respective side each of the brake pressure booster. This known design and arrangement of the components which make up the brake actuator assembly does not give the component group manufacturer the opportunity to put together the same mounting plate with different brake pressure boosters, as may be required, e.g. to replace a dual chamber brake pressure booster by one that comprises four chambers in tandem arrangement. The bearing or support blocks must be positioned precisely before being welded to the mounting plate. That requires expensive equipment which always must be exchanged when the shape of the support blocks or their mutual spacing changes.
It is, therefore, the object of the invention to devise a brake actuator assembly for motor vehicles of a kind which will be easily adaptable by proper choice of the various component parts and their simple assembling to meet different demands.
Starting from a brake actuator assembly of the kind specified initially, this object is met, in accordance with the invention, in that
the mounting plate is a member which is independent of the brake pressure booster and has a central hole,
the rear housing portion of the brake pressure booster has its tubular connecting piece passing through the central hole to the rear and fixed to the mounting plate, and
the support blocks are formed in one piece with a common stiffening plate provided with a central recess through which the tubular connecting piece passes as well.
The tubular connecting piece which protrudes to the rear from the rear housing portion of the brake pressure booster, in a manner known per se, thus becomes a reference member for positioning the mounting plate and the pedal unit with respect to each other and to the brake pressure booster. Both the mounting plate and the stiffening plate may be centered directly or indirectly--the stiffening plate via the mounting plate or vice versa--on the tubular connecting piece. In any case, the pedal subassembly can be totally prefabricated before the stiffening plate is assembled with the mounting plate and the brake pressure booster. One and the same mounting plate can be fitted together selectively with brake pressure boosters of different diameters and/or different lengths as long as the rearwardly projecting tubular connecting pieces of these brake pressure boosters have the same diameter or provided any variations in diameter can be compensated by a simple annular adapter. In corresponding manner one and the same mounting plate can be assembled selectively with different pedal arrangements.
In a preferred embodiment of the invention the mo
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patent: 4022112 (1977-05-01), Putt et al.
patent: 4538503 (1985-09-01), Hachiro
patent: 4586580 (1986-05-01), Spielmann et al.
patent: 4592438 (1986-06-01), Spielmann et al.
patent: 4785628 (1988-11-01), Myers
patent: 4787205 (1988-11-01), Fontaine
patent: 5072438 (1991-12-01), Heibel et al.
Heibel Helmut
Pickenhahn Josef
Look Edward K.
Lucas Industries Public Limited Company
Nguyen Hoang
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