US2365875A - Cushioned journal box - Google Patents

Description

- Dec. 26, 1944.,

A. u. HERSEYI ET v 2,3653% CUSHIONED JOURNAL BOX Filed May 10, 19 43 2 Sheets-Sheet l .4 1 f a i I I gvvucnwfom Arthur J. Hwk'sgll l awzd Charla L. a&den

D v(26, -A. J. HERSEY ETAL 2,365,875

. CUSHIONED JOURNAL BOX Filqad May 10, 1943 Y 2 Sheets-Sheet 2 awuc/Mom rthur J. Hevse and Q Charles L. Madden Pa tented Dec. 1'

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Arthur I.

use, and Charles L. Madden, Minneapolis, Minn.

. A lication my 10, ms, Serial No. 4:10.344 o 4 Claims. c1. sea-.1)

I -our invention relates tocushioned mountings fo'r bearings and particularly to cushioned Journal boxes for the axles ,of railway trucks.

' An object of the invention .is to provide an improvedcushioned mounting of simple, .durable 'and relatively inexpensive construction, includ-', ing cushioning means of annular formation in-'-' tjerposed between and distributed axially along a center member and an outer encircling mem-' ber, said means cushioning each member relative to the other against forces imparted thereto. .A further object of the invention'is to provide a-cushioned mOuntingLas above; inwhich the material of the cushioning means occupies positionbetween interdisposed axial abutments occurring .in succession on .both the center membet and the outer encircling member,- the structure providing for the axial flowaze of the cushionlng material between each abutment on each member and the adjacent abutment on the other member.

-Another object of the invention is te -provide a cushioned mounting, as above, in which one of the concentricmembers consists of a plurality of mating sections adapted to be conveniently clamped together, 'thus enabling'the structure be readily assembled and disassembled. h

More specifically, it is an object of our inven- -tlon to provide a cushioned journal box of the foregoing", characteristics 'for railway trucks adapted to be applied to an'axle of such a truck and the associated pedestal-jaws of the truck'for sliding movement in the latter, such journal box having the cushioning miterialthereof subjected.

to pre-tensioning adjustment .to accord with the loading "encountered and such material being eifectively protected against bearing lubricants and heat.-v

. Another object of the invention to'provide animproved Journal box for railway trucks in which the cushioning means serves to damp the, harmonics set up in the conventional load supporting springs insuch trucks. a j

Other obiects'of'the invention reside in the novel combination and arrangement of parts and t in the details of construction hereinafter illusted and/or described.

.- .In the accompanying drawings, Fig} 1 a view partly in plan and partly in section, the same illustrating a structure in-embodiment of our invention'and in theform of a .iournal box for a conventional railway -truck.- -Fig.- '2 is an elevational view of the-structure shownin Fig; 1.

'Ihe familiar construction in railway trucks is -not shown. it being well known of such, nature conventionally includes axles, a truck frame having pedestal Jaws, and journal boxes iournaled on theends of the axles ,and slidably guided in the pedestal laws, the truck 5 frame being supported byhelical springs borne Y by said iournalboxes.

Reference being had to the drawings. wherein similar parts'are designated in the different figures by similar reference characters, it will be seen that Fig. 1 shows one end of an axle III to which is applied a Journal bo'x', designated in its entirety by the reference letter A. Mounted on a reduced end portion of said axle l0 and held in place thereon by a nut II is a conventional anti- 5 friction bearing 13 having external races I2, I;

secured by thrusts.

- Our Journal box structure A is mounted on said external races l2, ll of said anti-friction o bearing B and includes two concentrically related annularly spaced members, viz., a

-' member 0; and an outer member D.

center The'center member 0 of the Journal box K.

itsqnne] redgeathrustshoulder lswnichens a the race"; Conventional packing, not shown,

will be interposed in a customary manner between ring "and the axle! to prevent escape of bearing lubricants'from the inner end of sleeve C. To prevent the escape of such lubricants from the outer end of said sleeve-O, we employ a sealing cap which being removably secured to said sleeve C by bolts Formed-externally of the sleeve C, midway be- 4 5 tween the ends thereof, is an annular flange or abutment 21 and externally of said sleeve, at

seated for movement axially of the. sleeve. Clamping b lts 25, extending through said sleeve (I from end; to end thereof and through both endrings litsecure saidend-rings to the sleeveand urge toward each-other and said sleeveflange- II.

'66v outer member of our Journal 'box A rolling elements it against end overrstwhes the. end of the axle Hi and closes thebore of the sleeve at its outer end, said cap 10 n either end thereof, is. an'annular rabbet "2 3 in which-an end-ring 'orabutment 24 is slidably' a box-like casing,-the thickness of which corresponds with the length ofthe sleeve C, said casing having a cross -sectionally circular opening therethrough from one face'to the other and being rectangular in outline to provide a planiform surface 24 at its upper edge and parallel planiform surfaces 21 at the front and rear edges thereof. The casingD consists of axially inner .and outer mating sections 24 which meet at a plane medially of the flange 22 on the sleeve C, said sections 28 being detachably tied together by means of clamping bolts 24 extending therethrough. I 1

In the assembled relationship of easing sections 28 and sleeve C, the'inner casingsection 2| encompasses the inner end of the sleeve C axially overreaching the inner end-ring 24 and its ad- 'jacent half portion of the flange 22 on said sleeve and axially spaced from the outer end-ring 24' and said flange 22.

Resilient material in annular formation comprising-cushioning means occupies the annular space between the sleeve C and casing sections 24, said means, as shown; consisting of cushioning rings 2|, there being a pair of such cushioning rings for each casing section 24, one ring of such pair being locatedat one side of its respective internal rib Ill and the other ring located at the other side of said .rib. The cushioning rings ii for each casing section 28 meet internally of their respective internal rib l4 and are crosssectionally shaped to fill the annular space between the sleeve C and such casing section, except at the one extreme portion of such space exteriorly of its respective end-ring 24 and the other extreme portion thereof exteriorly of the half-portion of the sleeve-flange 22 adjacent such end-ring. These extreme portions of the annular space within each casing section, normally unoccupied by the resilient material of the cushioning means, provide room for the flowage asses" a c from the inner end thereof, that is, to this-n I as seen in Pig. 1, the shock of such thrust is met. in part, by the cushloning'ririg ll of the outer casing section 24 located between the sleeveflange 22 and the internal rib 44 of said casing section and, in part, by the cushioning ring 4| of the inner casing section 24 located between the internal rib 44 of that section and the inner end-ring 24 on the sleeve C. Thus, annularly of the structure at spaced localities axially therealong are cooperating pairs of abutments with cushioning material therebetween for absorbing axial shocks. In addition to relative radial and axial cushioned movements between the sleeve C andcasing D, it is obvious that said parts are also relatively movable, under the yielding restraint of the cushioning material, to compensate 'for'stresses-tending to. misalign the same with for the axial flowage of the resilient material I thereof.

Preferably, the sleeve-flange 22 and the endrings 24 on the. sleeve C and the internal ribs 30 on the casing-sections 24 will be cross-sectionally formed so that the resilient material of the radially inner and radially outer portions of each cushioning ring 3|, upon flowage under compression, will meet with progressively increasing resistance to such flowage in each such ring-portion. To this end, each portion of the annular space, between the sleeve C and easing D occupied by a cushioning ring-3|, has an annular throat and is progressively annularly constricted at either side of said throat in the direction provided for the flowage of the cushioning ring material.

of such material when it is subjected tol forces tending to compress the same.

The upright fore and aft' planiform surfaces 21 of the casing D slidably flt betweenthe facing surfaces of pedestal laws on a railway truck frame and said casing is formed with guideflanges 42 along the margins of. said surfaces 21.

porting springs of the truck. with respect to axial thrust shocks; it will be seen that a succession of cooperating abutments come into play Openings 23 are formed in the sleeve C from end to end thereof concentrically about the axis of said sleeve externally of the sealing ring l'l and sealing cap 24. Air within and passing through said openings 43 substantially dissipates the heat generated in the anti-friction bearing B, thereby preventing the conduction of such heat to the cushioning rings 4|.

.The end-rings 24 are identical and so also are the casing sections 24. This construction promotes the ready assembly 'of the parts. Nuts 44 on the clamping bolts 25, which tie the end-rings 24 together and secure them to the sleeve C, are tightened along with nuts 4! on the clamping bolts 24, which tie the casing sections 28 together. This tightening of said nuts 24, 44 causes the two relatively 'remote' cushioning rings 3|,to be ini-. tially compressed between the end-rings 24 and casing-ribs 34 and the two relatively adjacent cushioning rings II to be compressed between said ribs 40 and the sleeve-gflange 22. Thus, the resilient material .of the cushioning rings If is pre-tensioned a desired, the degree thereof depending upon the extent to which the nuts 44, 44

on the clamping bolts 24, 24 are tightened. Under many circumstances, it will be desirable to pro: portion the parts so that the desired pre-tension 2liutlilssleeveC.

' adjacent annular portion of Having described our invention, what we claim as new and desire to protect by Letters Patent is: 1. A cushioned journal box for a railway truck having a frame, an axle and a bearing mounted against end movement on said axle, said journal box comprising a sleeve mounted against end movement on said bearing, said sleeve having a fixed external annular flange between its ends and axially adjustable end-rings at the extremities thereof projecting radially beyond said sleeve,

a sectional casing encompassing and providing an annular space between the same and said sleeve, said casing being slidably guided vertically in said truck frame, each end portion of said casing encircling one of the end-rings and the adjacent annular portion of the annular flange on said sleeve, each end portion of said casing having an internal annular rib thereon axially spaced from said annular dense and its respective end-ring and radially overreaching the same, each end portion of said casing having annuiarly formed cushioning means of resilient material filling the casing portion and annular space between such said sleeve except at the extreme portions of such space terminating externally of said annular flange and the corre-, sponding end-ring, the cushioning material-for each casing portion being flowable along said extreme portions of the annular space within such casing portion under compression induced by its respective end-ring or by relative radial movement between sleeve and casing, such cushioning material for each casing portion serving under .all degrees of such compression thereof yieldingly to maintain a normal relation axially between casing and sleeve.

2. A cushioned journal box for a railway truck having a frame and an axle, said journal box .including' annularlyspaced concentric members, the inner member constituting a journalfor said axle and the .outer member being slidably guided vertically in said frame, one of said members being formed intermediately thereof with an space between'such end portion of said second member and said first member under compression set up by its respective end-ring or resulting from relative radial movement between said members, such cushioning material for each end portion of said second member serving under all degrees of such compression thereof yieldingly to maintain a normal relation axially between said members.

- 3. In a cushioned bearing mounting. for a shaft, one thereof being revoluble relative to the other, said mounting comprising a bearing sleeve applied to said shaft, said sleeve having an external annular flange between its ends and axially adjustable end-rings at the ends thereof projecting radially beyond said sleeve, a casing encompassing and providing an annular space between the same and said sleeve, each end portion of said casing encircling one of the end-rings and the adjacent annular portion of the flange on said sleeve, each end portion of said casing having an internal annularrib' thereon axially spaced from said annular flange and its respective endring and radially overreaching the same, each end portion of said casing having annularly formed cushioning means of resilient material filling the annularspace between such casing portion and sleeve except at the extreme portions of such space terminating externally of said annular flange and the corresponding endring, the cushioning material for each casing portion being flowable along said extreme portions of the annular space within such casing portion under compression induced by its respective end-'- ring or by relative radial movement between sleeve and casing, such cushioning material for each casing portion serving under all degrees of such compression thereof to maintain a normal relation axially between casing and sleeve. 4. In a cushioned bearing mounting for a shaft,

one thereof being revoluble relative to the other,

said mounting including annularly spaced concentric members, the inner member constituting annular flange and having axially adjustable endrings, each end portion of the other member axially overreaching one of the end-rings and the the flange on said first member, each end portion of said second tive end-ring and'radially overreaching the same,

each end portion 01 said second member having iannularly formed cushioning means of resilient material filling the annular. space between annular space between abearing applied to said shaft, one of said members being formed intermediately thereof with an annular flange and having axially adjustable end-rings, each end ber axially overreaching one of the end-rings and the adjacent annular portion of the flange on said first member, each endv portion of said second member having an annular rib'thereon axially spaced from said annular flange and its respective end-ring and radially overreaching the same, each end portion of said second member having annularly formed cushioning means of resilient material filling the annular space between the same and said first member except at the extreme portions of such space terminally overreaching said annular flange and the corresponding end-ring, the cushioning material for each end portion of said second member being flowable along said extreme portions of the such end portion of said second member and said first member under compression set up by its respective end-ring or resulting from relative radial movement between said members, such cushioning material for each end portion of said second member serving under all degrees of such compression thereof yieldingly to maintain a normal relationally be-' tween said members,

extreme portions of the annular ARTHUR J. HERSEY. CHARLES L. MADDEN.

portion of the other mem--

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