US693815A - Ball-bearing. - Google Patents

Description

UNrrnn STATES ATENT anion.

FRIEDERICH ERDSIEK, OI MINDEI', GERMANY, ASSIGNORATO HOPPE da HOMANN, 0F MINDEN, GERMANY, A FIRM.

BALL-BEARING.

SPECIFICATION forming part of Letters Patent No. 693,815, dated. February 18, 1902.

Application filed September '7, 1901. Serial No. 74,697. (No model.)

T0 all whom t may concern:

Be itknown that I, 'FRIEDERIGH ERDsIEK, workmaster, a subject of the Kingof Prussia, German Emperor, residing at Minden, Westphalia, in the Kingdom of Prussia, German Empire, have invented certain new and useful Improvements in Ball-Bearings, of which the following is a specification;

My invention relates to ball-bearings.

In ordinary ball-bearings two conical running or Working faces have hitherto been used for receiving the pressure of the balls, said conical faces being exactly adjusted to the two series of balls in order to obtain the smallest friction with the smallest possible extent of play or looseness and to compensate for wear of the surfaces. Great exactness, (for instance, one one-thousandth of a millimeter,) as is well known, is desirable for the adjustment, so as to obtain the best effect. The adjustment of the ball-bearings hitherto used has been effected by direct screwing of conical cups against the series of balls. To secure the cups in position, clamping of the same or fixing by means of teeth or pins has been resorted to hitherto. A Both the direct adjustment as well as the methods of fixing the cups have great disadvantages, especially when an adjustment or regulation is necessary on the road or racing-path in case the parts become Worn or require adjustment. All these disadvantages are overcome by the construction forming the subject-matter of the present invention.

The new construction comprises in contradistinction to the ball-bearings hitherto used two conical ball-race devices not adjustable toward and from one another, a screw-threaded ball-bearing cup being provided for the adjustment capable of being indirectly r0- tated by means of a worin-wheel and two or more pins or equivalent devices actuated thereby in order to effect an exact positioning of the bearing-cups. A special fixing of the ball-bearing cup after adjustmentl has taken place is not necessary, as the wormwheel is secured against rotation by its worm, and therefore also the ball-bearing cups themselves are secured against unintentional movement. A form of construction of such a ball-bearing (as applied to the bottom is shown in the accompacranks are attached or formed integral therewith, these cups having central tubular extensions, the beveled ends c of which meet or nearly meet in the center of the hub and are drawn together by means of a screw-bolt -c. In order to prevent the beveled ends or faces c from sliding over one another, the tightlyclosed casing d is slipped over the box of o. The rotation and adjustment of the outer ball-race 'part or cup b is avoided by means of this simple arrangement after tightening of the screw-bolt, so that the two cups or running surfaces must be considered as immovable toward each other.

e is the inner bearing-cup for the left-hand series of balls,rigidly mounted in the casing af.

fis the adjustable bearing-cup for the righthand series of balls. The bearing-cup fis screwed into the casing a and is provided with two pins t' t' or the like, which pass through or into the worin-wheel g and rotate with it. The rotation is effected by means of a worm h gearing with the worm-wheel g, the worm h being easily rotatable, but not longitudinally movable within the chamber The worm-wheel g is prevented from lateral displacement by means of a projection z on the right-hand side in the casing a, and by means'of a ringg/ at lits left-hand side. Arotation of the worm h to the left or to the right effects a corresponding rotation of the Worm wheel g and indirectly by means of the pins a similar rotation of the ball-bearing cup f, which is screwed thereby either farther into the casing a or out of the same, whereby the adjustment of the sets of balls in their races takes place. The bearing-cupf is secured in any position against unintentional movement by the worm-wheel.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to beperformed, I declare that what I claim isba11bearing cups one of which is screwed into the easing or hub, a Worm-wheel rotatably movable but incapable of longitudinal movement in the casing behind said cup, a worm for operating said Worm-Wheel and a eonneetion between the latter and the ball-bearing ou p, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witmesses.

FRIEDERICII ERDSIEK.

lVitnesses:

FRITZ BURGMANN, L. RAsoH.

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