Conveyors: power-driven – Conveyor section – Pusher conveyor and separate load support surface
Patent
1988-10-12
1991-02-05
Skaggs, H. Grant
Conveyors: power-driven
Conveyor section
Pusher conveyor and separate load support surface
198733, B65G 1924
Patent
active
049897241
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a fastening arrangement for an entraining element of chain conveyors, particularly for underground mining.
A fastening arrangement of this character for entraining elements of single-chain, central double-chain and outer double-chain conveyors is known, for example, from the West German Offenlegungsschrift No. 23 53 005 and the West German Auslegeschrift No. 29 08 683. Fastening of the chain link to the entraining element currently takes place by means of a chain clamp which is complementary to the chain link. The chain link and chain clamp are disposed in a suitable complementary receiving space of the entraining element proper. The chain clamp has two vertically extending bolts which pass through corresponding bores in the entraining element and fastening screws must be threaded onto the bolts. The bolts extend vertically upwards so that the screws are accessible from above thereby allowing an entraining element which has become worn, for example, to be dismantled.
The known varieties of this fastening arrangement have the disadvantage that the chain clamp is expensive to manufacture since the upwardly extending bolts must be equipped with threads. Exchange of an entraining element is time-consuming because the screws are normally corroded and, accordingly, difficult to loosen. Finally, it is necessary to carry out the exchange with special tools, namely, appropriate screw drivers and the like. Further, the loosened nuts may be lost and the thread of the upwardly projecting shaft of the chain clamp is frequently damaged so that the chain clamp can no longer be used.
It is an object of the invention to create a fastening arrangement which is simpler to manufacture and install while providing equally good fastening of the entraining element to the drag chain.
This object of the invention is achieved by providing the entraining element proper with a receiving space for the chain, clamp. However, fixing of the chain clamp in this receiving space of the entraining element no longer takes place via screw means. Rather, fixing occurs by means of wedges so that fastening of the entraining element to the chain link via two driven-in wedges takes place due to the wedge slope. By virtue of the wedge slope, the chain clamp is pressed against the chain link.
In this manner, more rapid installation and less expense for installation tools are achieved. Of particular importance is the elimination of the thread so that damage can no longer occur and manufacture of the actual chain clamp is simplified.
Exemplary embodiments of the invention are described below with reference to the drawings.
In the drawings:
FIG. 1 schematic exploded view of a first embodiment with only one chain link being illustrated for clarity; and
FIG. 2 is a sectional view of a modified embodiment.
In FIG. 1, a chain link is denoted by 1 and, together with additional chain links, forms the drag chain proper. An entraining element 2, which slides in a non-illustrated conveying trough, is to be fixed to this drag chain.
A suitable receiving space 5 is provided within the entraining element in order to fix the entraining element 2 to the chain link 1 of the drag chain. This receiving space 5 can be closed by a chain clamp 3. The inside of the receiving space 5 and the downwardly facing side of the chain clamp 3 in FIG. 1 of the drawing are shaped in such a manner that a form-fitting fixing of the chain link 1 is obtained.
Two semicircular wedges 4 are provided in order to arrest the chain clamp 3 in the receiving space. The receiving space 5 is bounded by side walls 8 and receiving spaces 6 in the form of bores 9 are provided in these side walls 8. By inserting the wedges in the bores 9 of all four side walls 8, the wedges engage arresting flanges 10 on the chain clamp 3 from above and thereby press the chain clamp 3 onto the chain link 1. In order to achieve and improve the requisite fixing and form-fitting arrest of the chain clamp 3 in the receiving space 5, the wedges are provided with a wedge slope alpha illustrated in FIG
REFERENCES:
patent: 1048848 (1912-12-01), Miner
patent: 2756869 (1956-07-01), Merck et al.
patent: 2832246 (1958-04-01), Livermont
patent: 4171822 (1979-10-01), Thun
patent: 4579477 (1986-04-01), Hartman
patent: 4768750 (1988-09-01), Wilson
Bidwell James R.
Kontler Peter K.
Skaggs H. Grant
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