US323468A - Anti-friction journal-box - Google Patents

Description

.(No Model.)

T. TRIPP.

ANTI FRICTION JOURNAL BOX.

Patented Aug. 4, 1885.

Eva/Z2302" 275mm: Z5720,

uuw n nn. Waslingtun, D. Q

UNITED STATES PATENT rEicE.

THOMAS TRIPP, OF STOUGHTON, MASSACHUSETTS.

ANTI-FRICTION JOURNAL-BOX.

SPECIFICATION forming part at Letters Patent No. 323,468, dated August 4, 1885.

Application filed DCCilll lO! 31, 1884. CSO modehl To aZZ whom it may concern.-

Be it known that I, THOMAS TRIPP, a citizen of the United States, residing at Stoughton, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Anti-Friction Journal- Boxes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to that class of jourrial-boxes in which the. friction upon the revolving shaft or journal is transferred to a series of bearing-rolls surrounding the latter, confined within a suitable journal-box; and it consists, p ri maril y,in such an arrangement that the entire series of rolls inclosing the journal shall work actively in lieu of, as heretofore. employing one-half the series actively, and using the remainder as separators, so called, to prevent contact of the bearing-rolls one with another, and thereby lessen the friction; secondly, in having two series of bearing-rolls which are the same in number, with the rolls of one in alignment with the rolls in the other, and while each roll revolves independently upon its individual axis, yet all rotate in unison about the incloscd journal or shaft, and,-thirdly, in the general construction and disposition of parts, whereby each bearingroll is maintained apart from the next adjacent ones, and the device as an entirety may be adjusted to a line of shafting at any desired point without disconnecting said line or removing pulleys.

The drawings accompanying this specification represent,in Figure l, a side clevation,and in Fig. 2 a vertical central longitudinal section, of an anti-friction journal embodying my invention. Fig. 3 is an end elevation of the same,while Fig. 4. is a plan of the separator-- ring, so-called. Fig. 5 is a transverse section thereof,and Fig. 6 a section on line to a: in Fig. F.

In these drawings, A represents a shaft or axle adapted to any purpose, and to which this anti-friction journal-box may be applied, while B is the journal or bearing-surface. represents the exterior portion of the journalbox,constructed of the usual shape,and adapted to inclose the bearing-rolls and their cooperating parts, to be hereinafter described.

The bearing-rolls are shown at (t a, 850., as disposed in two series, 1) E, surrounding the journal and concentric therewith. Moreover, each individual roll is free to revolve inde pendently, of any other, and is in axial alignment with the journal upon which it revolves. Hitherto in several journal-boxes of this class each bearing roll is continuous the entire length of the journal; hence if the box becomes slightly larger at one end the rolls in this part have a tendency to revolve more rapidly and to twist and wrench, if not break, the various parts composing the journal-box. I have endeavored to obviate this defect by allowing each bearing-roll to act independently of any other, either those next adjacent in the same series or in axial alignment in the opposite series. Moreover, in journal-boxes of the class heretofore premised the bearingrolls are kept apart by separators, so called, which are ordinarily loose rolls surrounding the journal, and the sum of the diameters of all the rolls must be such that each roll shall just touch the next adjacent ones when the entire series is in place about the shaft or journal. The consequence is after much hard service and consequent wear the bearing-rolls have a chance to skew upon the journal, and either cut that or enlarge the box proper.

To overcome the objections arising from the nicety and time required to adjust a number of rolls around a shaft so that the peripheries of the entire series shall be continuously in contact, and to cheapen the construction of the entire device, I have formed a separatorring, so called. (Shown at F.) This ring may for ordinary purposes be cast entire, but when it is required as abearing for line-shafting I propose to make it sectional, as shown in the drawings.

In Fig. 6 the main ring F is shown in two parts, I) 0, while two thinner plates, cl 6, struck from a circle of the same diameter, lap joints therewith and are passed over the separatorrolls,whi ch extend through them,and are thus used to cooperate with the parts I) c and form an integral ring about the shaft.

Having struck out the four pieces I) c d e of suitable external and internal diameters for purposes hereinafter to be explained, Ibore a series of holes, f f, &c., of any suitable size concentric with said ring F, and either odd or even in number. (See Figs. 4 and 5.) Into these holes are to be tightly driven a series of steel pins, g g, &c., whose entire length is equal to that of the journal, and upon which are loosely adjusted the bearing-rolls a a, &c., which are simple cylinders of hardened steel or other suitable material, and bored to fit the pin, but somewhat larger. The bearing-rolls revolve upon said pins and are maintained in position by the latter.

It will be easily understood that in a device so constructed it is a matter of indifference, as each bearing-roll is separate from the next adjacent ones,whether the spaces between any two rolls are precisely the same or not, providing only that the rolls are of the same diameters, that each may take anv active part and bear upon the periphery of the journal.

The entire weight of the body carried by the journal comes upon the exterior periphery of said journal, and the interior periphery of the box against its upper side, the diameter of the bearing-rolls being such as to snugly fit the space existing between the journal and internal bore of the box inclosing it or the space h. For this reason the dimension of the separator-ring must be always within the peripheries of the bearingrolls, (see Fig. 3,) and no strain comes upon said ring or its pins gg, the latter serving as spindles or axes, upon which the rolls revolve, and also maintain the latter in position whenever there is any tendency to depart therefrom.

The action of the journal-box is as follows: The rotation of the journal B,pressing against the bearing-rolls, compels the latter to rotate and travel about the said journal, the rolls a a revolving about the pins 9 g, 850., while the slight friction between the latter and their rolls is sufficient to rotate the separator-ring F, which moves very slowly, thereby changing the position of the spindles with respect to the bore of the rolls, and maintains said spindles cylindrical.

This journal-box may be fitted to a line of shafting without removing any boxes or pulleys or disconnecting the line, as follows: Supposing the various parts composing the same are not united, the operator first takes the sectional plates Z) c composing the ring F, in which are securely fixed the pins 99, and adjusts them about the shaft; then slipping over the pins the similarly-perforated plates (Z c, which lap joints with the first plates, an integral separatorring is formed about said shaft and locked thereon; the series of bearing-rolls a a, all uniform in size, are then slipped upon their spindles or axes g g, and finally, the outside caps O O, composing the box proper, are fitted about said rolls andthe whole device is completed.

There are several advantages in an antifriction journal-box constructed in this mannerfirst, that for the same size shafts I can secure more bearingrolls, since all are active, and thus distribute and lessen the friction; secondly, there are no shoulders formed on any of the parts, which enables the device to be constructed cheaply and expeditiously, and, thirdly, the bearing-rolls, instead of extending the entire length of the bearing, are subdivided and independent one of the other, although always maintained fixed in the same relative positions about the journal. This latter device is to prevent twisting or shearing of the rolls and cutting of the bearing, which occurs when rolls are used extending the length of the journal in one entire piece.

1. In an anti-friction journal-box, the combination,with the double series of concentric parallel bearing-rolls, of the separator-ring provided with pins extending the length of the bearing, and upon which the bearing-rolls freely turn when revolving about the journals, substantially as stated.

2. A journal-box provided with aseparatorring revolving freely within said box and adapted to maintain a series of bearing-rolls in fixed relative positions one with the other about the journal, substantially as herein described, and for purposes set forth.

3. In an anti-friction bearing, the combination,with the journal, of a series ofinclosing bearing-rolls, all actively employed and free to revolve about said journal in its rotation, and the separator-ring with its pins, substantially as herein set forth.

,4. In an anti-friction journal-box, the sectional ring F, composed of the parts I) ode, and provided wit-h the concentric series of fixed pins 9 g, carrying the bearing-rolls a a, the inner and outer peripheries of said ring lying within the peripheries of the bearingrolls, substantially as stated.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS TRIPP.

Witnesses:

H. E. LODGE, F. Ounrrs.

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