Conveyors: power-driven – Conveyor section – Bucket
Patent
1995-03-28
1997-05-06
Valenza, Joseph E.
Conveyors: power-driven
Conveyor section
Bucket
B65G 1736
Patent
active
056262205
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a bucket conveyor, in which the buckets are fastened by connector webs to a plate link chain exhibiting outer and inner link plates interconnected by chain pins and in which, in transverse bores of the inner link plates, there are pressed bearing bushes for the chain pins.
In a bucket conveyor of the considered type, known from DE 35 45 634 A1, the ends of the outer link plates of the plate link chain are mounted, on both sides of a bearing bush bearing the ends of the inner link plates, directly on a respective chain pin. The known arrangement cannot be fully satisfactory inasmuch as the eyes of the outer link plates, which eyes are formed by transverse bores and serve to receive the chain pin, do not have the same diameter as the eyes of the inner link plates, into which the bearing bushes mounted on the chain pins are pressed. The use of identical outer and inner link plates is consequently not considered in the known solution. Added to this is the fact that the outer link plates are supported only on a narrow region of the chain pins which corresponds to their own width and in which, when a press joint between the chain pins and the outer link plates is relinquished, which press joint makes fitting more difficult, increased wear phenomena result when rotary motions are induced in the chain pins, by the inner link plates, in the region of chain pulleys.
The object of the invention is to provide a bucket conveyor of the considered type which permits comfortable and rapid chain fitting and simple chain shortenings or extensions and in which the joints of the chains can be configured in a simple and low-wearing design. This object is achieved according to the invention by virtue of the fact that also the outer link plates are equipped with pressed-in bearing bushes and are connected by the latter to the connector webs. For the connection of the outer and inner link plates of the bucket conveyor according to the invention, simple cylindrical chain pins are even able to be used even when the connector webs are provided with bearing journals for the transportation of the buckets, since the bearing bushes of the outer link plates are doubly used, namely not only as a bearing, but additionally as a bridge between the chain pins and the connector webs. Since the pins are mounted throughout their length in bushes, they have low susceptibility to wear regardless of their rotatability relative to all the link plates. The use of identical link plates, i.e. ones which are cheap to manufacture in considerable numbers, is possible. The buckets can be fitted and removed rapidly and without special tools.
It is shown to be particularly advantageous if the chain pins are mounted rotatably in the bearing bushes both of the outer and inner link plates and if at least the bearing bushes for the outer link plates respectively protrude on both sides over the bores which enclose them. In this way, not only is the susceptibility to wear of the chain pins in the region of the outer link plates reduced, but also the tilt resistance of the outer link plates mounted loosely on the chain pins is increased.
The invention is explained in greater detail below with reference to the appended drawing, in which:
FIG. 1 shows, partly in section, a portion of a first plate link chain, which portion is connected to the backs of buckets,
FIG. 2 shows, partly in section, a portion of a second plate link chain, which portion is connected to the backs of buckets,
FIG. 3 shows, partly in section, a portion of a third plate link chain, which portion is connected to the backs of buckets,
FIG. 4 shows a sealing facility for the bearing bushes of the outer and inner link plates represented in FIG. 1,
FIG. 5 shows a modified sealing facility, and
FIG. 6 shows a particularly simple sealing facility for the bearing bushes enclosing the chain pins.
In FIG. 1, two consecutive buckets of a plate link chain bucket conveyor are denoted by 1. The connection of the buckets 1 to the plate link chain is served by angular connector webs 2,
REFERENCES:
patent: 1712248 (1929-05-01), Brayton
patent: 2444812 (1948-07-01), Crowley et al.
patent: 5123524 (1992-06-01), Lapeyre
Bogdan Zvonimir
Dalferth Hans H.
Rieger Otto E.
Zenker Hartwig
RUD Kettenfabrik Rieger & Dietz GmbH u. Co.
Stone Mark P.
Valenza Joseph E.
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