Патент USA US2404475код для вставки
July 23, 1946. 2,404,475 A. c. DAVIDSON ' . RAILWAY‘TRUCK SPRING‘BRAKE " Filed Sept. 22_, 1945 '27 V 41 ' - 15 v I7 INVENTOR > ARTHUR C. DAVIDSON I /a F|G.4. ' 27 _ , ‘ . BY . . - - - z "g1'7rolywEY i K Patented July 232 1946 ' 2,404,475 UNITED ‘STATE s PATENT OFFICE l‘ 2,404,475, . ' RAILWAY TRUCK SPRING BRAKE‘ Arthur 0. Davidson, Chicago,‘_Ill. ' Application September 22, 1943, Serial No. 503,389 10 Claims. (Cl. 267‘—4) 1 for the bolster 8 and for bolsteresupp‘orting springs 9 which are supported from the intermediate portion of the tension member 5. Pref erably, a spring plank I0 extends between‘ side frames 3 at opposite sides of the truck‘ and a spring seat or carrier II is mounted on each The invention relates to the control of rail way truck Springs and consists in a spring brake or dampening‘ device and associated structure intended primarily for use in a truck of the type in general use in railway freight cars. The main object of the invention is to pre vent undesirable rebound action of the bolster end of spring plank I0. This spring carrier has upstanding lugs I2 and I3 vfor positioning the springs which give the vehicle rough riding characteristics tending to damage lading and to truck‘springs. A spring cap I4 is mounted on springs 9 and supports the end of bolster 6. derail the truck. Another object is to e?ect the desired snub bing of the rebound‘ action without substantially interfering with the initial compression‘ action A pair of ‘ friction plates I5 are pivotally se cured to spring carrier II by an arrangement described in detail below and‘ extends vupwardly therefrom and receivesbetween them a‘ friction of the springs which should be soft to maintain easy riding qualities of the truck and especially 15 plate I6 depending from spring cap I4. A bolt I'I ‘disposed horizontally extends through fric to protect light loads on which 71% of all dam tion plates I5 and “3 being carried by plates I5, age claims paid by railroads are'due to, lack of proper snubbing action while cars are in transit. Another object is to facilitate the installa tion and replacement of ‘spring brake or snub 20 tween each end of the bolt and the adjacent bing parts which may require renewal. Another object is to provide friction plates of large surface to resist rapid Wear and insure Plate I6 has a slot I9 elongated vertically to ac long life of unit. I ' Another object is to provide for the assembly of a spring brake without requiring; substantial change and with a minimum amount of work on the associated truck parts. ‘ and tensioning springs I8 are compressed 'be plate I5, thus thrusting plates I5 towards each other and‘ clamping plate It between them. commodate relative vertical movement of plate I6 and plates I5 in which the bolt is seated. Plate I6 is wedge-shaped with its sides con verging upwardly so that the friction between the plates during the rebound ‘or expanding movement of bolster springs 9 is substantially greater ‘than the friction offered during com These and other detail objects of the inven tion‘ as will appear from the following descrip 30 pression of springs 9. The amount of‘friction provided during compression of the springs and tion are attained by the structure illustrated in during expansion of the springs may be ‘con the accompanying drawing, in which— Figure l is a side elevation of a four-wheel trolled ‘and varied as desired by adjusting the tension on springs I8 and by predetermining the , truck for railway cars including the novel spring brake device characterizing the present inven 35 angle of convergence of the sides of plate I6, tion. It is desirable that the friction plates have ' Figure 2 is a detail vertical section taken on the line 2—2 of Figure 1 and drawn to a larger scale. ' pivotal movement to the side frame and bolster with which they are associated. Tov accommo date this requirement, the upper end of plate I6 ‘ Figure 3 is a similar section showing the parts 40 is of T section with the lateral arms 20 curved as indicated and cap I4 has similar arcuate ‘ lugs'2l cooperating with‘ the underface of the Figure 4 is a horizontal section taken on the in a different position. line 4-4 of Figure 2. ' ' Figure 5 is a detail vertical section taken on the line 5-5 of Figure 2. ' ' Figure 6 is a detail section taken approxi cap to form an elongated recess ‘into which the upper portion of plate I6 may be slid length- 7 45 wise and may be retained against removal by a locking bolt 22. Cap I4 and plate l6 may'tilt relative tov each other, as indicated in Figure 3, to accommodate relative lateral movement of The truck includes the usual axle-mounted the bolster and side frame or tilting of the bol wheels I, journal boxes 2 and side frames 3 which may be integral with the journal boxes 50 ‘ster in a transverse vertical plane relative to'the side frame or a combination of these relative or assembled with separately formed journal boxes. Each side frame includes a compression Plates I5 are anchored to spring carrier II by member 4, a tension member 5 and spaced struts an elongated member which includes a bar 24. or columns 6 cooperating with the middle por tions of members 4 and 5 to form a. window 1 .55 extending from side to side of carrier II and mately on the line 6-6 of Figure 5. ' movements. a . e _ 2,404,475 3 . Y received in a slot 25 provided in the latter. The ends 26 of'bar 24 extend beneath upwardly re cessed portions 21 of carrier ll vat the ends of 4 verge towards the spring seating member, where by the device offers substantially greater resist ance to the movement of the plates during move slot 25 and the anchoring device is thereby posi ment of the members away from each other than tioned and held in assembled relation with the 5 during movement of the members towards each spring carrier and spring plank and side frame. The body portion 23 of the anchoring device ex 6. In a railway truck spring brake, a spring tends upwardly from bar 24 and is recessed lat carrier, a plurality of coil springs seated on said erally at 28 to receive inturned ?anges 25 on the carrier, a cap member resting onsaid springs and lower ends of plates l5 to form a ‘bearing and 10 arranged to- support a truck bolster, said cap resist the upper thrust of plates l5. , member having adepending lug extending across ' With this assembly, plates l5 may pivot about _ the member transversely of the bolster and sub , carrier II to accommodate the relative move stantially at the middle of the member and slotted ment of the parts as described above. The single ' ' from one end towards the other end, a friction other. ' ‘ tension device bolt l1 passing through’ plates l5 , 15 plate having a head slidably received in said and I6 readily accommodates the relative'tilting ' '» slot, there being an upstanding part extendingv of the plates in‘ their general'verticaliplane so; ‘across the carrier in the same general vertical that'the bolster, as seen in Figure 1, may'rock‘l >Dlane as said depending lug on the cap member , relative to the truck [frame to the extent per-1 Lan'd recessed laterally, friction plates having their mitted by its ?t between the bolster columns 6, ‘ 20 lower ends flanged and,‘ received in the recess in and the friction device .is not subjected to any ‘said part, said plates overlapping said ?rst-men strain "from such ro cking‘ movement of the ‘.bol , tioned friction plate, and yielding means carried on said plates and thrusting them into frictional engagement with each‘ other. < -' > If desired, the elements of the springxcarrier and spring. cap may be made integral with the 25 7. In a railway truck spring brake’v structure, spring ‘plank. and therbolster or the parts of the a spring carrier plate having spaced areas for v spring carrier may even be made integral with, mounting springs and having an elongated slot ‘ the side frame (as in a spring-plankless truck) between said areas, there being upstanding lugs and, if desired, the anchoring device 23,24 mayv at the ends of said slot each having an upwardly be made integral with the spring .carrier or spring 30 ‘extending recess in its lower surface opening “to plank or side frame, and other variations in ‘the .wards the other lug, a friction deviceanchor construction may be made all without departing vmember positioned in said slot with its ends re from-the spirit of the invention. , ‘ V , ceived 'in'said recesses, said member, between its ‘What is claimed is: ' ends, extending upwardly above the level of the 1. In a devicecf' the class described, a member :35 plate ‘and having laterally opening recesses .for ‘ foriseating'truck .springsxa cap member for sup- 1 receiving horizontal ?anges on the lower ends of v sterl _ , ' ' . porting a truck bolster on the truck springs, a - pair‘ of plates extending abreast of each other . y upright 8,. An’friction anchor plates. for a railway , » truck . 7 spring ~ ._ > brake and substantially .vertically from one of said including a spring carrier with laterally and members and individually 'pivotally secured Silo downwardly opening recesses nearopposite sides .thereto, a single plate extending .substantially and an upright friction plate above the same with , vertically from the other of said members and a hooked lower end, the anchor -.co1_nprising;an pivotally; secured thereto and’ received "between ‘ elongated member with ends receivable in vsaid ' , recesses and arranged between its emigre project thrusting the pair of plates towards ‘each' other 1 4-5 above the level of saidv ends} and there recessed said‘pair pf‘pl'ates, and spring means yieldingly ‘ to‘ frictionally engage the opposing surfaces of 1 the other plate. l ' ' laterally to receive the hooked lowerend of the’ , <2. Astructure as des friction plate and anchor the same to the carrier. ' ‘ 9. An anchor for a railway truck springibrake cribed in claim '1 in which :' the meansxclamping the plates together com including a spring carrier with. laterally and ‘ prisestabolt extending substantially horizontally I550 downwardly opening recessesnear opposite sides j through the plates andrsupported by at leastone and a pair of upright friction plates withhooked "of the plates, there being a coil spring between lower ends facing towards each other,‘ the anchor each end of the "bolt and the adjacent platerw ' having narrow end portions adapted to be re- } 3; A device as described in claim’ 1 ‘in which ceived .in said recesses and also having. a down 3 the ‘plates and spring means are inclinable as a ;55 wardly iacingrbar spaced above the levelof said ‘ unit relative to the bolster-supporting cap Fmem end portions to form an elongated recess open. ‘ ber‘to' accommodate shifting of'a bolster-mounted ‘ ing inopposite directions to receive the oppositely i on the ‘cap member relative to the spring-seat facing hooked lower ends .of the friction plates. 1 member without substantial movement of the 10. In a railway'truck spring brake structure, I plates relative to each other. ~ ‘ £60 a spring carrier plate having spaced areas _for 4. Adevijce-as described in claim 1, which the connection between the cap member and-the . remainder-of the device includes elements slidable ; .on eachother horizontally and providing for 1 movement of the cap member, laterally with’ re <35 ‘ spect to the remainder of the device withoutsub mounting springs and having an elongated slot between said areas, there being upstandinglugs at the ends of said slot each having an upwardly .extendingrecess in its lower surface’ opcningyto wards the other lug, ‘arfriction device anchor , member positionedin saidslot with its ends'piv .stantial-m-QVement of the frictionally engaged otally received in .said recesses, and an upright ‘ ,rfriction plate structure s ecured ' to said anchor ' - platesrelativejto each other. 7 V . ‘ , .5. .A structure as described in claim 1 in which the Jf-rictionallyengaged-surfaces of the platesdi member. E70 ' ' » l I ARTHUR C.1DAVIDS,ON,.1 .