Machine element or mechanism – Gearing – Interchangeably locked
Patent
1984-08-23
1986-10-14
Staab, Lawrence J.
Machine element or mechanism
Gearing
Interchangeably locked
74391, 744115, 74760, 192 4A, F16H 5710
Patent
active
046165207
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a national phase application corresponding to PCT/EP83/00259 filed Oct. 5, 1983 and based, in turn, upon a German application of Dec. 28, 1982 under the International Convention.
FIELD OF THE INVENTION
The invention relates to an arrangement of a brake in a wheel head equipped with reducing gear.
BACKGROUND OF THE INVENTION
Known arrangements of brakes in wheel heads (see German Patent Application No. 30 13 431.7-21 or U.S. Pat. No. 4,037,694) have internal brake disks non-rotatably secured to the set of teeth of the sun wheel of the reducing gear driven by a differential shaft and external brake disks non-rotatably secured to the set of teeth of the hollow wheel which is steadfastly mounted in its housing, whereby power-assistance means is provided in the carrier of the hollow wheel as a brake pressure annular piston, operated by a pressure medium.
The disadvantages of these usual constructions currently known become evident especially in the production of large series of axles with such wheel heads and in their use in practice. Because of the interchangeable dimensional relationship of the construction parts with regard to each other it has proven difficult to provide for adaptability to changing user requirements (performance, way of brake actuation, maintainance), since it was almost impossible to create any equipment variations with a single, definitely established axle concept. For instance, in the case of the aforementioned hollow wheel with the differential shaft not only the ratio of the reducing gear, but also the effective diameter of the brake disks, the mode of securing the hollow wheel carrier and as a result also the type of power assist are rigidly established. The ratio could not be varied further since the diameter of the hollow wheel was rigidly established. In the case of given larger hollow wheels, disadvantageous diameter ratios D/d of the brake disks also resulted, which means that in certain ranges of the rotation rate these would run erratically and be prematurely damaged or their braking efficiency would be impaired. When for instance, a different hollow wheel carrier became necessary due to a different power-assisting means, the placed available in the housing was not sufficient or the supply of the pressure means in the hollow axle did not suit the arrangement of the brake piston in the carrier of the hollow wheel. Due to such interdependencies not only uneconomical manufacturing- and assembly processes resulted, but also the use and maintainance were impaired.
OBJECT OF THE INVENTION
The principal object of the invention is, therefore, to create the conditions to make possible the construction of a reasonably and flexibly adjustable wheel head, wherein even varying diameter ratios and various types of brake actuation can be favorably adjustable to the same axle housing and differential shaft basis within the optimal housing (for instance enabling the use also of different hollow wheels).
SUMMARY OF THE INVENTION
According to the invention, a wheel head with planetary gearing as previously described has its central shaft segmented so that it consists of an axle shaft section running in the hollow axle and a sun wheel shaft or terminal shaft section directly following the driving shaft section and which is replaceably mounted, even in the case of an assembled brake, with the aid of a connection part or sleeve holding them together nonrotatably but detachably.
The axle shaft or driving section and the hollow axle penetrate sufficiently into the housing so as to be overlapped by a hollow wheel carrier into which is integrated an annular brake piston actuatable by a pressure medium or a brake-easing cylinder together with a set of brake springs and pressure actuatable to relieve the force of these brake springs on the stack of brake disks.
According to the invention, therefore, the set of teeth of the sun wheel, the entire reducing gear and in certain cases also the brake disks are now of variable diameters and
REFERENCES:
patent: 2612786 (1952-10-01), Schmitter
patent: 3148556 (1964-09-01), Gibbs et al.
patent: 4010830 (1977-03-01), Logus et al.
patent: 4037694 (1977-07-01), Keese
patent: 4043226 (1977-08-01), Buuck
patent: 4142615 (1979-03-01), Sidles, Jr. et al.
patent: 4270412 (1981-06-01), Beijer et al.
patent: 4317498 (1982-03-01), Jirousek et al.
patent: 4391351 (1983-07-01), Jirousek et al.
Caspar Peter
Dziuba Peter
Ehrlinger Friedrich
Katzorek Karl-Hermann
Veser Karl
Diehl Dwight G.
Dubno Herbert
Ross Karl F.
Staab Lawrence J.
Zahnradfabrik Friedrichshafen Aktiengesellschaft
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