Bearings – Linear bearing – Plain bearings
Patent
1996-03-28
1998-01-06
Jillions, John M.
Bearings
Linear bearing
Plain bearings
384 42, F16C 3300
Patent
active
057047162
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE INVENTION
The invention relates to an arrangement for mounting slides between a feeding beam for a rock drilling machine and a slide means such as a carriage mounted longitudinally of the feeding beam, the arrangement comprising slide frames attachable to the slide means on both sides of the feeding beam, and slides fitted in the slide frames so as to be in contact with slide surfaces extending on both sides of the feeding beam in its longitudinal direction and at an angle with respect to each other.
A rock drilling machine moves along its feeding beam in a carriage, which today is mounted with respect to the feeding beam either slideably by utilizing slides of longitudinally movable by utilizing rollers of different kinds or other similar means. The travelling centralizer of the drill rod and the hose reel also move on similar structures.
A widely used structure utilizing various rollers is expensive to produce and difficult to mount and adjust. Rollers are liable to damage, as they are exposed to very high surface loads due to the line surface contact of the rollers. Such rollers also wear out easily, and they are difficult to adjust with the smallest possible clearances and in such a way that the drilling machine would be in a straight position with respect to the drilling axis. Furthermore, a structure is known in which slide frame halves made of separate form profiles are attached to the carriage, each half comprising strap-like slides of synthetic material that slide along the surface of the feeding beam. In this solution the clearances of the carriage are intended to be adjusted by oblique elongated holes. The solution is very complex and nevertheless difficult to adjust. Moreover, the structure is expensive to realize and requires plenty of different machining operations and fittings of great dimensional accuracy.
The object of the present invention is to provide an arrangement for mounting slides which is simple and easy to produce and easy to mount in position and needs no substantial adjustment during the use of the slides. The arrangement according to the invention is characterized in that the slide frame is an integral body provided with a groove to be positioned towards the feeding beam and intended for the slides, that the slide is an integral body insertable into the groove of the slide frame by pushing in its longitudinal direction, the slide having a groove to be positioned towards the feeding beam such that the slide is in contact with both of the slide surfaces provided in the feeding beam at an angle with respect to each other.
An essential feature of the invention is that the slide frames are preferably made of an aluminium alloy by extruding into a desired shape so that the slide frame has a groove intended to be positioned at the slide surfaces of the feeding beam. The groove extends longitudinally of the beam and enlarges in the direction towards the feeding beam, and a slide is to be positioned in the groove between the feeding beam and the carriage or the like. A further essential feature of the invention is that the slide is an integral body, which can be made e.g. by casting into a mould so that its one side fits tightly into the groove of the slide frame while the other side can be positioned accurately against two slide surfaces provided in the feeding beam at an angle with respect to each other. Still another essential feature of the invention is that the groove of the slide frame and the slide are such in cross-section that the slide can be inserted into the groove only in its longitudinal direction and that it is attached to the carriage preferably by transverse grooves formed in it or by mounting pins or bolts passing through holes, the slide frame being secured by the same pins or bolts.
The structure according to the invention is simple and easy to assemble, and no adjustment of clearance is required in normal use. The structure is resistant to wear and retains its direction during the use of one lot of slides without adjustment.
In the fo
REFERENCES:
patent: 1981992 (1934-11-01), Curtis
patent: 2049394 (1936-07-01), Johnson
patent: 3650576 (1972-03-01), Hughes
patent: 4566738 (1986-01-01), Fasth
patent: 4682899 (1987-07-01), Andersson et al.
patent: 4925320 (1990-05-01), Foster et al.
Jillions John M.
Kaness Matthew A.
Tamrock Oy-(L.C.)
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