Mining or in situ disintegration of hard material – Hard material disintegrating machines – Sidewall-working
Patent
1982-09-23
1984-07-24
Purser, Ernest R.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Sidewall-working
105 29R, 421C 2736
Patent
active
044615124
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to machines for recovering minerals by mining and, more specifically, it deals with feed systems of mining combines.
The invention may be most advantageously used in mechanized complexes designed for working coal deposits and fuel shales.
The invention may also be used in recovering ores of non-ferrous and rare-earth metals occurring in ore seams at various dip angles.
The invention may also find application in other industries where it is desired to ensure a reliable feed of a machine similar to a mining combine or vehicles over a soil surface with an intricate relief with varying slope angles.
DESCRIPTION OF THE PRIOR ART
At present feed systems of mining combines, having as the basic elements a drive gearwheel installed on the combine and a traction rack extending in the direction of the combine movement, are extensively used in mining engineering. The systems of this type seem to be preferable compared with other systems owing to the smoothness of movement, reliability in operation and safety for operators.
Known in the art are numerous structural embodiments of the gearing consisting of a gearwheel and a rack.
In the majority of cases they cannot, however, bring a solution to the problem of ensuring a reliable engagement under complicated conditions associated with an intricate relief of a geological formation; they cannot provide for steering the combine with respect to the face plane either. In one type of such system the pitch of the gearing changes at points where the traction racks are joined to one another, and in another type of such system the traction racks take up various transverse loads.
In the majority of known systems the drive gearwheel of the combine is lifted above the line of action or its valley engages the gear pins. Clogging of the gearing has the same effect. As a result, drive gearwheels, gear pins, the racks themselves and their fasteners would be deformed and rapidly fail.
Known in the art is a feed system of a mining combine (cf. USSR Inventor's Certificate No. 642478, Cl. E 21 C 29/14, publ. 15.01.79, Off. Bull. No. 2, 1979), comprising a round-section track rigidly secured to a conveyor frame. A traction rack having gear pins is rigidly secured to the guide member and to the conveyor frame. A combine having a drive gearwheel or a pin gear meshing with the traction rack is installed on the track and on the conveyor frame. The traction rack is made up of segments. The segments of the traction rack are articulated to one another, the axes of rotation of the segments relative to one another extending below the axes of the gear pins when the traction rack bends.
The disadvantage of this system is misengagement in the gearing consisting of the drive gearwheel and the traction rack upon a change in the relief of the seam or when steering the combine, because the traction rack is rigidly secured to the track and to the conveyor frame.
In addition, when the traction rack is bent together with the track and the conveyor frame upon a change in the relief of the seam, the pitch of the gear pins changes at points of the joints between the segments of the traction rack as the segments rotate about the axes of the pivot joints. This causes misengagement in the gearing consisting of the gearwheel and rack.
SUMMARY OF THE INVENTION
The invention is based on the problem of providing a feed system of a mining combine, wherein, owing to a simple and reliable construction of the traction rack fastening, an optimum engagement in a lantern-wheel gearing is ensured with the drive gearwheel of the combine when it moves in seams with an intricate relief, as well as during steering of the combine.
The invention consists of a feed system of a mining combine, comprising a track made up of individual tubular segments interconnected for limited movement relative to one another, on which is installed a combine having a drive gearwheel meshing with a traction rack extending along the track and consisting of individual segments pivotally connected to one a
REFERENCES:
patent: 4025120 (1977-05-01), Balinov et al.
patent: 4082361 (1978-04-01), Lanfermann
patent: 4155600 (1979-05-01), Lanfermann et al.
patent: 4184715 (1980-01-01), Lanfermann
patent: 4186970 (1980-02-01), Minke et al.
patent: 4326753 (1982-04-01), Rynik
Alexeev Mikhail S.
Gelfand Lazar M.
Lukienko Viktor G.
Nikolaev Stanislav V.
Popov Anatoly G.
Podmoskovny Nauchno-Issledovatelsky I Proektnokonstruktorsky Ugo
Purser Ernest R.
Starinsky Michael
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