TRANSMISSION WITH PROTECTION AGAINST OVERLOADS

A gearing unit has an input shaft coupled via a gear train and a clutch to an output shaft which can propel a drive chain for a mineral winning machine or plough. The clutch is released by hydraulic pressure and a load sensor operates a valve device to release the clutch should an excessive load occ...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	VERNER BOLE,DE, VILLI KUSSEL,DE
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	BLASTING BRAKES CLUTCHES COUPLINGS FOR TRANSMITTING ROTATION EARTH DRILLING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING MINING MINING OR QUARRYING THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A gearing unit has an input shaft coupled via a gear train and a clutch to an output shaft which can propel a drive chain for a mineral winning machine or plough. The clutch is released by hydraulic pressure and a load sensor operates a valve device to release the clutch should an excessive load occur. The response of the hydraulic system is optimised by using a special fast-switching valve device and by maintaining a certain pressure in a release chamber of the clutch by circulating pressure fluid through the valve device when the clutch connects the drive to the output shaft. This pressure is lower than that necessary to release the clutch and the valve device rapidly switches to increase the pressure should an overload occur.