US1460580A - Friction shock-absorbing mechanism - Google Patents

Description

July 3, 1923. l 1,460,580

s. B. HAELTlNL-z FRICTION SHOCK ABSORBING MECHANISM Filed Aug. '7, 1920 To all whom it may concern:

Patented July 3, 1923.

UNiTEo-STATES f 1,460,586 PATENroi-Fica s'iAcY is.' HASELTINE, or CHICAGO, inniixiois,'Assrefuoa lro WILLIAM H. MINER, or f criiizv, NEW Yoax. f 'f IERICLION SHOCK-ABSORBING MECHANISM.

Application filed August 7, l1920. Serial No. 401,901. f

. B'e it known that I, STAGY B.,HAsE.L'r1Nn, a citizen of the United States, residing at Chicago, in the countyof Cookand State of Illinois, have invented a certain new and useful Improvement inFriction Shock-Absorbing Mechanisms, of which the following is a full, clear,"concise,and exact description, reference being had'to the accompanying drawings, forming a par of this specification. Y This invention relates to improvementsy in friction shock absorbingmechanisms. c

The object of the invention is to provide a high capacity friction shock Vabsorbing mechanism. especially adapted for railway draft riggings and wherein are obtained large wearing frictional areas and a combined graduatedv frictional-resistance and straight` spring resistance. v Y l Inthe drawing forming a 'party' of this specification, Figure 1 -is a horizontal longitudinal sectional viewfof a portion of a railway draft rigging showing my improvements in connection therewith.. Figures 2 and 3 are vertical transverse sectional views taken on the lines 2--2 and 3 3 respectively of Figure-1. And Figure 4 is aldetail perp lber and each isformed' on its inner side with spective of one of the frictionshoes.

In said drawing, -10 denote channel shaped'center or draftsillsof a railway car to the inner faces of which are secured front stop lugs 11 and rear stop; lugs'12. A portion of a drawbar is'indicatedfa-t-l lto which isrigidly attached a yoke 14C-of well-known form. The shock absorbing 'mechanism proper, hereinafter described, anda front follower areV disposed within the yoke. The yoke and movable parts therein are supported by a detachablesaddle plate 16.y The ring F; 'apluralityof -combined friction shoes andI wedges G;

and a pressure-transmitting member f f Thecasting A, yas' shown, is preferably of ycylindrical form' landprovided at its rear end with Aan integral wall 18 adapted to act' as flat friction surfaces2 ring F.

the rear follower of the mechanism. Approxima-tely at its center vand on the interior thereof, the casting A is formed with ananiiular. shoulder indicated at 19 to form a seat for the ring F tolimit the inward movement ofthe latter with respect to the casthe friction post D, as shown, is'of hexagonal cross section and is'rigidly but detachably secured at its rear endto the casting A by a bolt 20 and nut 21. The post D is formed with an open-sidedv slot indicated at 22 in Figure 3 to permit'the head of the bolt being slipped therein,.the shanklof'the the rear wallofthe casting A.- y

The ring F is sho-wn as Inadeinj a single piece to thereby promote economy of manubolt passing' through a suitable opening ini.

*facturel and strength 'in operation. On its outer side,I i. e., the side nearest'the open end of the castingfA, itjisformed witha plurality of'wedge faces 23--23, the same corresponding? in number-to the-number of'sides on the ost' D. Onitsinner side,=the ring F isbeve ed `as indicatedat 2li-to cooperate ywith correspondingly beveled anges on the inner-'ends of the shoes E.

lThe shoes E are 'preferably three in numa pair of longitudinally' extending friction Vsurfaces 2.6 intersectingatjan angle of 120o yand adapted 'to cooperate withtwo-adjacent vcorresponding:longitudinally extending friction surfaces 126-126 on the postjD.Y *On its outer side, each shoe E is provided with another pair of longitudinally.` extending .-27 arranged slightly forwardly divergingwith reference to the `surfaces 26,V Each surface27 is adapted to cooperate witha corresponding longitudinally' extending flat friction surface 127 on a combined wedge-shoejG. The `latter are formed with wedgefaces l123 adapted to cof operate with the wedge 'faces 23 of .-i the The-spring B preferably consists of inner l `and outer coils, the same 'bearing at their Vforward ends-against the flanged inner ends of the shoes E. y

The pressure-transmitting I memberl H f is formed at its outer end with an; annular flange 2S contacting directly with-the follower 15 and is extended inwardly vthereof .with a hollow stem 29-adapte`d to loosely surround the outer end of thepost'D, The stein v110 pended hereto.

29 has an inner shoulder 30 with which Yis adapted to cooperate a washer 311 detachably bolted to the outer end of the post D so as to hold the parts in assembled relation. It will be noted that the inner end of the vstem 29 engages the outer ends 32 of the shoes E.

The spring C is interposed between the flange Q8 of the member II and the outer ends of the wedge-shoes G.

The operation is as follows, assuming an inward or bnfling' n'iovement of the dr'awbar, As the follower 15 is moved inwardly the movement thereof is coi'nmunicated to the shoes E through the member H. During the movement of the shoes E', it will be noted that they are resisted 'directly by the spring B. In addition, the spring C is gradually compressed between the flange 28 and the wedge-shoes G so that the latter are gradually or progressively wedged inwardly by the ring F into tighter 'and tighter frictional 'engagement with the outer surfaces of the shoes E, there being also a slight additional wedging action due to the 'diverg'in'g rfaces 2T of the wedge shoes E co-acting with surfaces 127 of the shoes G. This in turn causes 'the shoes E to be pressed more tightly against the post D, thus generating friction on all surfaces o'f the po'st, all surfaces all surfaces 27, 'and all surfaces 127. The length of the casting- A is preferably so made that it will limit the inward movement of the follower 15 and thereby provide a strong column to transmit the ultimate excessive blows. In release, it will be noted that the member H is Yfree to move outwardly toward normal full released position Aindependently 'of the shoes E and in this way the spring is free to extend to its normal condition, thus relieving the pressure on the wedgeshoes G. This permits the shoes E being projected outwardly under 'the influence of the spring B. l

From the preceding description, it will he noted that the fr'ict'ional resistance is a graduaily increasing one proportionate to the "degree of Compression of the spring C. The resistance afforded by the spring B is 'merely that of an ordinary spring without modic'ation. Inner and outer sets of friction -surfaces on the lshoes E are provided 'thus giving unusually large wearing lareas and .promoting the life of the mechanism.

I have herein shown and described what I now consider the preferred manner of Carrying out the invention, but the same is merely by way of illustration and all changes and modifications are contemplated that come within the scope of the claims ap- I claim: l

v1. In a friction 'shock absorbing mechanism, 'the combination with a central friction post; of a plurality of friction shoes having inner friction surfaces cooperable with said post and provided also with outer friction surfaces; wedging means disposed exteriorly of the, shoes; wedge-shoes cooperable with Ysaid wedging means and the first named friction shoes, said wedge shoes and friction shoes sliding relatively during a. compression stroke, and spring means encircling said post for restoring said friction shoes upon removal of the actuating force.

2. In a friction shock absorbing mechanism, th'e combination with an outer `shell having wedging means on the interior thereof; of a friction post 'extending longitudinally within the shell and fixed with respect thereto; a plurality of friction shoes disposed around th'e post and 'having both inner and outer friction surfaces; friction wedge-shoes interposed between said wedging means and the first named fri-ctlion shoes and cooperable with the friction surfaces on the outer sides of the hitter; and spring means for restoring the friction shoes to normal position 'upon renroval of the actuating force.

3. In a friction shock absorbing mechanism, the combination with a friction post; of a plurality of friction shoes ldisposed around said post and provided with friction surfaces on the inner and youter sides thereof; spring means for 'directly resisting relative movement between said shoes and post; wedgin-'g means disposed 'exteriorly of the 'sho`es; friction wedgeLshoe's interposed between and cooperating with 'said wedging means and first named friction shoes; and spring means, independent of the first named spring means, cooperable 'directly with -said wedge-shoes and arranged to be compressed proportionately to the move-` ment of the rst named friction shoes on the post.

4. In a friction shock absorbing Vmechanism, the combination with "a' friction post; of a plurality 'of friction shoes disposed around said post Iand provided with fric-1 tion surfaces o'n the inner and outer sides thereof; wedgin'g 'means disposed exteriorly ofthe shoes; combined wedges and friction shoes interposed between said wedging means and the first nanied friction shoes; a member adapted to transmit actuating pressure to said first named friction shoes 4and formed i'n'clependently of 'the ylatter; and a spring interposed between s'a'id member and the combined wedge-shoes.

5. In a friction 'shock absorbingmechanism', the 'combination with a friction shell having wedging vmeans on the interior thereof; of a vfriction postl centrally disposed within the Shelli; 'a plurality of friction shoes disposed around said post; fand having both inner and outer lsets of friction surfaces; a .plurality of wed-ge friction shoes interposed between said wedging means and the first named friction shoes; a spring interposed between one set of ends of the rst named'friction shoes and said shell; means for transmitting pressure to said first named friction shoes; and a spring resistance interposed bet-Ween said means and said wedge-shoes, said shell being adapted to act as a column at the end of the permissible compressive action.

6. In a friction lshock absorbing mechanism, the combination with a shell having la centrally disposed friction post; of a wedge ring mounted within said shell and prevented against movement in one direction relatively thereto; a plurality of friction shoes,

disposed around said post; a spring resistance interposed between the inner endsy of said shoes and the shellgaplurality of wedge-shoes interposed between said ring and rst named frictionshoes; a pressure;

transmitting member engaging the .other ends of said first ynamed `friction shoes; and a spring resistance interposed between said pressure-transmitting member 4vand lthe.

wedge-shoes. Y

7. In a friction shock absorbing mechanism, the combination Vwith a central friction member having. peripherally located longitudinally extending friction surfaces;

l 'of a plurality of friction shoes encircling said friction member and frictionally cooperable with said friction surfaces thereof;

an outercasng shoes and locatedl on the'interiory ofthe casspring means disposed withinsaid casing.

8.'In a frictionk shock absorbing Lmecha: nism', the combination witha Vfriction post; l of a plurality of slightly tapering"friction vshoes disposed around said post and providl v ed with friction surfaces yon the inner and o-utersides thereof; spring means for` di-Q; v rectlyy resisting relativemoveinent between said shoes and post; wedcring meansdisposed exteriorly of the shoes; friction wedge shoes interposed between and cooperating withv Y said wedgeymeans and first named frictiony shoes; and spring means independent ofthe iirst named lspring means, cooperable directly with saidwedge'shoes and arranged f to be compressed proportionately to the 'movement of the first named friction shoesl on` the post."` i f l, v In witness that I' 'claim the foregoing I `havehereunto subscribed name-.this 13th? 60 day of July, 1920;

Witness l y o CARRIE (iri-iILING.V

wedging means fixed with! respect to said casing duringa compression stroke, between said casing :and friction sTAoY e. Hiisnijriniaf",

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