Showing papers on "Slewing bearing published in 1990"
Patent•
03 Jan 1990
TL;DR: In this article, the authors describe a crane with a jib mounted on a tower, together with hoist winches from which ropes are reeved round pulleys at the jib head to lifting tackle with slewing mechanism.
Abstract: The crane has a jib mounted on a tower, together with hoist winches from which ropes are reeved round pulleys at the jib head to lifting tackle with slewing mechanism. The tackle comprises a slewing table, whose top part (24) is coupled via a slewing ring (25) with drive mechanism (31-33) to a slewing frame (26) or plate. On the latter are couplings (27) engaging with the load or with a spreader handling freight containers. There are four hoist ropes with similar drive mechanisms, fixed to the top part at points (11, 14) forming the corners of a rectangle. USE/ADVANTAGE - Fast slewing and handling of loads having a high moment of inertia.
4 citations
Patent•
22 Feb 1990
TL;DR: In this article, the rotational area of the complete device is divided into the area of an upper feed or delivery unit (13) and a lower delivery or feed unit (7), and a ball bearing slewing ring is provided in both areas.
Abstract: not available for EP0427730Abstract of corresponding document: DE3826050Device for loading and unloading unit loads including an upper feed or delivery unit (13) and a lower feed or delivery unit (7) as well as a vertical conveyor (2) linking the two areas. The rotational area of the complete device (1), seen over a rotational angle of at least 360 DEG , is divided into the area of the upper feed or delivery unit (13) and the area of the lower delivery or feed unit (7). In a prefered embodiment, a ball bearing slewing ring (14, 10) is provided in both areas.
1 citations
Patent•
19 Apr 1990
TL;DR: In this article, the jib is mounted on the slewing part and during non-slewing operation on additional bearings (4) can be connected to additional abutments (6) which are attached to the non-lewing base of the crane.
Abstract: A slewing crane with jib is characterised in that the jib in normal slewing operation is mounted on the slewing part and during non-slewing operation on additional bearings (4) can be connected to additional abutments (6) which are attached to the non-slewing base of the crane, while the bearing arrangement at the slewing part (16) is released (Fig. 1).
Patent•
03 May 1990
TL;DR: In this paper, a wind energy converter for installation on garages, bungalows and other flat roofs for the purpose of obtaining electrical energy, comprising a bracket, the cruciform ends of which are fastened with pegs on the concrete surface.
Abstract: Wind energy converter for installation on garages, bungalows and other flat roofs for the purpose of obtaining electrical energy, comprising a bracket, the cruciform ends of which are fastened with pegs on the concrete surface. In the centre is an opening for a rotatable pin. Situated around the latter is the ball bearing slewing ring and above the slewing ring are three bearing blocks connected to one another, the central one representing the pin as a rotatable connection to the bracket. Located above the bearing blocks are three axle bearings in which the drive axle runs. Fastened on the axle are four hubs having eight spokes and four vanes, two on the left and two on the right which diagonally oppose each other, the vanes being laterally bounded by triangular end pieces. Fastened on the central bearing block is the wind indicator. Located on all three bearing blocks are mountings for a screen running obliquely, which serves to configure the lower semicircle in a useful manner. Located thereabove is a partition which serves to prevent the two different air currents mutually obstructing each other. Located at the end of the drive axle is a large toothed wheel which, via a pinion, operates a small generator for light winds, and, by means of its shaft passing through, automatically also connects the large generator via a centrifugal clutch in the event of strong wind force.
Patent•
01 Feb 1990
TL;DR: In this article, the rotational area of the complete device is divided into the area of an upper feed or delivery unit and a lower delivery or feed unit, and a ball bearing slewing ring is provided in both areas.
Abstract: Device for loading and unloading unit loads including an upper feed or delivery unit (13) and a lower feed or delivery unit (7) as well as a vertical conveyor (2) linking the two areas. The rotational area of the complete device (1), seen over a rotational angle of at least 360 DEG , is divided into the area of the upper feed or delivery unit (13) and the area of the lower delivery or feed unit (7). In a prefered embodiment, a ball bearing slewing ring (14, 10) is provided in both areas.