Патент USA US2400504код для вставки
May 21, 1946. I s. B. HASELTINE v FRICTION v a , SHOCK ABSORBER Filed Jan. 27, 1944 2,400,504 . . Patented May 21, 1946 2,400,594 T I 1FRICHONYSHQCK.ABSOWEREIE‘ , , ':z,400,504"; I .. .1 ' f'Stacy B. Haseltine,1"-La Grange, llllyl'ass‘ignoii to‘ I ' ‘ ofvDelawaref"lr H.‘Minerg'rIncqrchicago,11].,Y-a:corporation;~ --,; .. a v - Application January 27, 1944, Serial‘Noi,5l9,892 ' 3 Claims. (Cl._267--9)1: 1 Y . .This invention relates to improvements in ’ ~ , _ . , 4. )Qne'pbject-of. theiinventionlv ., - f Y l0f—l!l,y The transverse upper end walls of. the friction shock absorbers, especially. adaptednfor snubbing or dampening the" action ‘of. railway car truck springs. ' » openings .l,2_-I_2 wprovide- horizontalfstop shoul ders'f B743 for a purpose hereinafter pointed _ out._,';Atjtl'1_e vu'p'per"‘end, the casing is ‘provided to provide a 6 with ‘inwardly extendinglguide slots 'l4-;l4 at frictionefshock absorber. forsnubbinglthe action diametrically opposite'_:_sides,,thereof,_ said [slots of ,trucl; springs of railway cars, comprising 5% being :o'pen‘at theirfunpen ends. ,‘7 As, shown in friét'iori easing, _. a eooperating, inherently; resilif- Figure’. lggthei longitudinal .axes- of thetslots; ‘I new“ 9111i?’ iexpari'dible‘ friQtiQn member having sliding lie-ima'central vertical plane, which .isparallel rrietionarengagement withinthe casing; and‘? 10 to’ith'e; planesiofthe frictionsurfacesill-=10. f.‘ spring resistance elementfoppqsmg vrelative slid; frh'e; upper ‘follower. ‘1B; islin the form of disc ' ins movement of the-I casing and frictionlimemr hayihlga laterallyprojecting, annular ?ange l5 ber, wherein ' the frictional reslstance. Produced of lesser thickness ‘than'the central main body of is a substantially: constant during all phases, of saidfdigdjg ' operation of the device. -' _» ' . _, v _ Amqre specl?c oblect, of the lnventlqn 71.5159 provide ,a friction Shock absorber, as glittery}? 11} the rzrecgdmg peregralihhwherelrlé the? ‘, 1 ll , _ v ,. ' f 15 [Depending from’. the central portion of ‘the disclilreffollowérB isa transversely disposedeye member iaiwhic'h is vertically aligned withthc slotsd'de-ldo‘ffthe' casing Afand is adapted to 13191.1 92.181115 ,wrmyldeq rw-ltl} _(?.pp9§edr 10951.12“? - J travel. in said‘ slots. as the" follower. B is’ moved dlnsllv extendma'mterwr'frlqtwn surfacgsi and 20 axiallytowardthe casing. ' ' 7 ’ ' . the."expandible?iction member is'in‘th'e' f°rm ‘e lfrictio ‘member drain‘ the form or a of a U'shaPéd ‘spring :Pme?having' the. arm‘? 's'éctlbr? ljbmprisings'spalgedtepirallel, .gside larms U ha' ed resilient steel la 0 rectan' ular cross thereqf _m ‘sliding 'fri-c-tionalj itmgagtmentiliwiih . I"‘l_"—l'1lll‘the formjofwsllbvstagntially ?at platesece tfhe fnctlon,.surfaces of'ime geslngi 1 fother qblttts of the mvfmtlon wllnporepleaxly 25 tions» and ‘a curved. section‘ l8‘ connecting said agjpeaé’ 1am‘? the d¢$°ri1°t1°n and ‘#tm‘s hemml ar?is“ at their 'ubpér‘e?as “The section- I8’ is a er oowmg. . ‘ - __ . . -> t In the .drawmg, formmg Va part of thhsi Specl?' 7 yru, _ c r_. s11 htl ‘thicker. than the arms 'l.'|—l1an 3 en ' gagedythroughwthe 'open'ing'of Ttheeye‘gnémbér cation,‘Figure 1 is a' transverse. vertical sec- 16' The‘ 'sectib-n- “is sumsoftédgn time 'cr'm‘s tional view of the improved frlction shock ab- 30 member of the eye '6’ and the upper side of the Sorber' Figure 2 is a horizontal sectional View’ curved section l8 abuts the underneath surface ' 2-2 _ _ correspondmg substan t'lauy to th e l‘ne 1 of of the follower B,whereby said friction member F'i ure 1. Fi ure- 3 is a top lan view of Fig- _ _ _ Hr‘: 1_ Figurge 4 is an elevatgonal View of the C 1s ?xedto the follower B for movement m um f‘ son therewith. ‘n ' ‘ d shock ab orb not“) casing of th6 Improve 5 er 3‘)# The arms I 1-H of the member C extend into 1. 1 0 mg fr 0m 1eft toriht'nFiure g 1 g the casing A and have sliding frictionalv engage-v ok' My improved shock absorber comprises . . . ' broadly a friction casing A; an upper follower ment with the friction surfaces l0—l0 of the B; a U-shaped friction member C carried by the latter fonower B and Slidable Within the casing; and 40 The lower ends of the arms are turned laterally a spring D opposing relative movement of the casing and friction member_ The casing A is in the fgrm of a'cylinder‘ having two opposed, interior, ?at friction surfaces l0—l0 extending lengthwise thereof. The fric- 45 tion surfaces l0—l0 are at the upper end of the outwardly, thereby providing stop 1118's ‘9-491 which engage underneath the shoulders |3—|3 of the casing to limit outward movement of the friction member C and the associated follower B and hold the mechanism assembled. The spring D comprises a Single heavy coil sur casing, as shown in Figure 1,, and are preferably parallel to each other. At the base thereof, the casing A is provided with a laterally projecting, annular ?ange H, which forms the lower fol- 50 rounding the casing A and having its top and bottom ends bearing respectively on the flange l5 of the follower B and the ?ange ll of the casing A. The spring D is preferably under ini' lower member of the device. The side wall of the casing A is provided with tial compression. The U-shaped spring plate friction member C, relatively large, substantially rectangular openthrough its spring action, has a tendency to ex ings l2—l2 at diametrically opposite sides of ‘ pand, thus holding the arms thereof in tight fric the same, inwardly of the friction surfaces 55 tionalv contact with the friction surfaces of the 2,400, 504 that come within the scope of the claims ap casing and maintaining the stop lugs |9—l9 in cooperative relation with the shoulders l3-l3. pended hereto. I claim: 1. In a friction shock absorber, the combina Inasmuch as the U-shaped friction member C is in the form of a resilient spring plate, the arms thereof may be ?exed toward each other so that the lugs l9—l9 will clear the friction surfaces of the casing to permit telescoping of the arms with in the casing in assembling the parts of the mech anism. q a. j v j ~ 1 - tion with a cylindrical friction casing having in terior, longitudinally extending, opposed, flat fric tion surfaces at one end thereof and an integral follower member at the other end thereof; of a follower, movable axially, toward the end of the casing having the friction surfaces; a U-shaped 7 My iniprovea “shock absorber preferably rel places one of the spring units of a truck spring cluster, being interposed between the top and bot~ 1i -' tom spring follower plates of said cluster. “Howe , ever, as will be evident to those skilled in this art,v ‘ several of these improved shock- absorbers, may be. used in a single spring cluster, replacing two or more units of the same. In order to accom modate the usual centering projections employed, on a well-known form of spring follower plate, the follower B and the base portion of the casing A are provided with openings 20~—-20. , The operation of the improved shock absorber is as follows: Uponlthespring cluster of the truck of a railway ‘car being compressed between the spring follower plates, of said cluster, the follower friction spring member movable in unison with said follower, said member having a pair of resil ,ient, flat, straight, platelike arms telescoped with in the casing in sliding engagement with the fric tion surfaces thereof rand a coil spring surround ingsaid casing and bearing at its opposite ends on said follower member and follower. 2. In a friction shock absorber, the combina ' tion with a lower friction casing having opposed, interior friction surfaces at the upper end there of; of a base ?ange on said casing; an upper fol lower,‘ said upper followerland casing being mov able toward and away from each other in verti cal direction; a depending eye on said upper fol lower integral therewith; diametrically opposite thereby snubbing the action of the truck springs. guide slots in said casing cooperating with said eye to slidingly guide the same; a U -shaped spring plate member engaged through said eye and hav ing depending platelike friction arms slidably en gaged with the interior friction surfaces of the casing ; and a coil spring surrounding said casing and having its top and bottom ends bearing ‘re spectively on said upper follower and base ?ange Upon recoil of the truck springs, the‘spring D is of the casing. free to expand and return all of the parts'tc' nor 3. In a friction shock absorber, the combination with a friction casing having longitudinally ex tending, interior friction surfaces; of a resilient U-shaped friction member having the arms B and the casing A will be moved toward each other against the resistance of the spring D, the U-shaped member C being moved in unison with the follower During this action, the arms l‘|-,|'I of'the resilient U-shaped friction member are forced to slide inwardly of ‘the friction casing A along, the friction" surfaces“ lll-‘V-lll thereof, mal positionjoutward movement'of the _U -shaped member and follower B‘ being limited'by thestop lugs‘ |9—'_l 9 of the'member'B coming into engage- I ment with theshoulders 13-43 of the‘ casing. As will be evident, 'the'frictional resistance pro vided by my improved shock absorber'remains substantially constant ‘during both compression and expansion of the‘m'echanismthus providing the desired snubbing‘action in both‘ compression and recoil of the truck'spring's. ' > 'I ' 'v _ I have ,vherein shown and described what I now 'considerfthe preferred manner‘of carrying ‘out my invention, but thesa'meis merely illustrative and I contemplate all changes and modi?cations ' " ‘ thereofin sliding'frictional engagement with the friction surfaces of the casing, said casing; and member being movable towardand ,away from each other in, lengthwise direction, said arms having outturnedhooked ends; shoulders on said casing engageable‘ by said hooked ends to limit longitudinal separation of said casing and mem ber; and spring means yieldingly opposingrela tive movement of said casing and member toward each ‘other. 1 1 _ I ~ STACY B. HASELTINE.