Turning speed reducer for the turntable of an excavator

A shovel includes a turning drive unit. The turning drive unit includes a turning electric motor, a turning speed reducer configured to transmit the rotational driving force of the turning electric motor to a turnable body, a brake unit configured to maintain the turnable body in a state where the t...

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Bibliographische Detailangaben
Hauptverfasser:	Okada, Takeshi, Inada, Akihiko, Hiranuma, Kazunori, Matsugi, Terukazu
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AGRICULTURE ANIMAL HUSBANDRY BLASTING CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPSOR SEAWEED DREDGING EMBANKMENTS ENGINEERING ELEMENTS AND UNITS EXCAVATIONS FISHING FIXED CONSTRUCTIONS FORESTRY FOUNDATIONS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HORTICULTURE HUMAN NECESSITIES HUNTING HYDRAULIC ENGINEERING LIGHTING LUBRICATING MECHANICAL ENGINEERING SOIL SHIFTING THERMAL INSULATION IN GENERAL TRAPPING UNDERGROUND OR UNDERWATER STRUCTURES WATERING WEAPONS
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Beschreibung
Zusammenfassung:	A shovel includes a turning drive unit. The turning drive unit includes a turning electric motor, a turning speed reducer configured to transmit the rotational driving force of the turning electric motor to a turnable body, a brake unit configured to maintain the turnable body in a state where the turning of the turnable body is stopped, a case forming a space in which the turning speed reducer and the brake unit are lubricated with lubricant oil and accommodated, a collar fixed around an output shaft of the turning speed reducer so as to rotate with the output shaft and covering at least a part of a relief part formed at a time of forming splines on the output shaft, and a sealing member provided between the collar and the case and hermetically sealing the lubricant oil inside the space.