US1149299A - Journal-bearing. - Google Patents

Description

H. T. SHEARER.

JOURNAL BEARING.

APPLICATION FILED MAR.15. 1913.

Patented Au irili HARRY T. SHEARER, OF WAYNESBORO, PENNSYLVANIA, ASSIGNOR TO THE LANDIS TOOL COMPANY, OF WAYNESBORO, PENNSYLVANIA, A CORPORATION OF PENNSYL- 'VANIA.

J OURN AL-BEARING.

Specification of Letters Patent. Patented Aug. 10, 1915.

Application filed March 15, 1913. Serial No. 754,592.

7}, 1/ 11-71mm it may concern:

Be it known that I, HARRY T. Snnxnnn, a citizen of the United States, residing at \Vaynesboro, Franklin county, and State of Pennsylvania, have invented and discovered certain new and useful Improvements in Journal-Bea rings, of which the following is a specification.

In the use of journal bearings in high speed finishing mechanism, such as grinding machines, etc, it is of great importance that the spindle shall at all times run true and steady and at the same time the bearings lit closely to the journals in order to avoid any vibration, thereby insuring the greatest efficiency of the machine. Heretofore much dit'liculty has resulted from the bearings in machines of this character heating, and under expansion caused by the heat becoming distorted, whereby the bearing itself has been given an uneven surface, the spindle and wheel carried thereby given an untrue rotation, and when cooled such binding has resulted as to commonly render the bearing unfit for further use, requiring the substitution of a new lining and causing considerable expense and delay.

The object of my said invention is to provide a journal bearing for such, and other, machines, that'will be capable of the expansion and contraction incident to its use without distorting its bearing surface, thereby preserving an even and true bearing at all times, and under all conditions, and also a hearing that may be closely fitted to the spindle, arbor, or other journal, without danger of undue binding during the operation, all as will be hereinafter more fully described and claimed.

Referring to the accompanying drawings, which are made a part hereof, and on which similar reference characters indicate similar parts, Figure 1 is a central longitudinal section through a journal bearing of a grinding wheel spindle for grinding machines illustrating a bearing of my improved form, Fig. 2 is a cross section through the same on the dotted line on Fig. 1. Fig. 3 is a view showing the lining in elevation, but with a section broken out to show one side ol' the interior thereof, and Fig. l a detail view showing a modification. 7

in said drawings, the portions marked represent the. grinding wheel spindle, B the outer casing of the bearing, and the lining. o

The journal or spindle A, and the casing B are, or may be of any approved form or construction. The journal A shown is the grinding wheel spindle of a grinding machine, the portion a being designed to receive and support the grinding wheel, not shown, but it may be any journal of any machine, as will be readily understood.

The lining C is preferably conical in form' on its exterior, having shoulders 10 and 11 at each end of the conical portion, the portions from said shoulders to the ends of the lining being pa 'allel with its inner face and 7 its axis and screw threaded from the outer ends to a point near said shoulders. Screw threaded collars l2 and 13 are mounted on said screw threaded portions abutting against the opposite ends of the casing B and serve to secure said lining in a fixed longitudinal adjustment in said casing. ( ircumferential grooves 14 and 15 are formed in the interior of said lining near each end,

and corresponding grooves 16 and 17 are formed in the spindle. An oil chamber 18 is formed in the lower side of the lining and easing B, in which a wick 19 is supported on a spring 20, as shown.

Thus far the construction described is not widely different from constructions heretofore in use.

By referring especially to Fig. 2 a series of longitudinal grooves 21 will be seen as formedin said lining extending from its outside surface to a point near its inner surface, but not cutting through said inner surface, and another series of longitudinal grooves 22 are forn'ied adjacent to said grooves 21 and extend from the inner surface of said lining parallel with the grooves 21 to a point near the outside surface of the lining, overlapping the inner wall or bottom of grooves 21. These grooves may be filled with porous or g'anulated material of non-heat conducting properties, such as cork, as shown. This construction leaves a thin longitudinal web 23 separating the adjacent walls of said grooves 21 and 22 throughout the length of the bearing. Several sets of these longitudinal grooves 21 and 22 are spaced at intervals around the shownfiin the principal views, five of the thin webs 23 separated by them. This construction thus provides at intervals around the circumference of the lining sections that are flexible and capable of springing to take care of any expansion, caused by heat with adjacent spaces to take care of such deflection of said webs as may be necessary. The metal itself will naturally straighten out when the bearing cools, but in order to assist in this process I interpose between the walls of the grooves 21, springs 2i of the form best illustrated in Fig.3 consisting of a stiff spring of serpentine form adapted to bear at short intervals against the opposite walls of the grooves and exert a conside able pressure against said walls, and thus assist in returning them to normal position after being sprung or buckled by the heat. This construction constitutes what I term an elastic" bearing or lining as it will automatically take care of any expansion and contraction incident to the use of the bearing, while maintaining a perfect fit with the spindle and supporting said spindle and the wheel carried thereby, so as to secure accurate and efficient results.

In the modification illustrated in Fig. at each set is composed of three grooves two extending in one direction, with the third between themproviding two flexible webs, which form will afford a greater degree of elasticity in the bearing and may be used when desired. Any wear in said bearing is readily taken up by loosening the screw threaded collar 13 and turning up the screw threaded collar 12, which will serve to draw the tapered or conical lining C through the casing B until a perfect fit is secured, and all lost motion taken up. By this means a bearing is provided which entirely obviates the difficulties mentioned in the first paragraph hereof, and its use results in a saving not only of much material and expense, but also avoids the trouble, delay and incon venience resulting from the binding and sticking of hot journals.

It will be understood that the term flexible as used herein is intended to mean capable of being deflected, bent, buckled, or distorted to compensate for the expansion and contraction of the metal.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters-Patent, is:

l. A journal bearing comprising a lining formed with a series of sets of adjacent longitudinal grooves spaced around said lining, part of each set of grooves extending from the outside surface inwardly and part to one side of the others and extending from the inside surface outwardly and overlapping, whereby thin flexible webs are formed between the grooves of each set capable of deflecting to compensate for the contraction and expansion of said lining, substantially as set'forth.

2. A journal bearing comprising a lining formed with longitudinal. grooves arranged in sets, part of the grooves of each set opening to the outside and part to the inside .of said lining forming a thin flexible web between them, and a spring adapted to bear against the side of said web to aid in maintaining its normal position, substantially as set forth.

3. A journal bearing formed with longitudinal grooves arranged side by side, part extending from the outside inward, and the adjacent groove from the inside outward forming a flexible web between said grooves, substantially as set forth. 7

l. A journal bearing havinglongitudinal grooves cut alternately from the inner surface and overlapping and from the outer surface, substantially as set forth.

5. A journal bearing comprising a lining formed with radial grooves extending longitudinally thereof. theadjacent grooves being out side by side and reversely to each other in'relation to the opposite faces of said lining, substantially as set forth.

In witness whereof, I have hereunto set my hand and seal at \Vaynesboro, Pennsylvaniathis 'i'th day of March, A. D. nineteen hundred and thirteen.

' HARRY T. SHEARER. [n s.]

' lVitnesses:

C. F. KooNs.

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