Патент USA US2408180код для вставки
Sept 24, 194.5- . 'r.l J. s'cHuETzrrAL FRICTION BRAKE . y2,408,179 ' - ' ¿yl [wmfffm» Sept. v24, 1946..,l J.' scHuETz >E'rm. _ 2,408,179 FRICTION BRAKE 4 Filed July 1o, -1945 4 Sheets-Sheet 3 w. ff /4 ' œ @y _Mm vSept,„24, 1946. ' - fr. J. sclfluETz :r'AL I ` . -' FRIcKTIoN BRAKE" '2,408,179 ` _ Filed J'ul'y 1o, 1945 '- ` ' 4'sn'èets-Vsneef 4 l 42 /l \ \\\\ im» //7'1/e/7 for : . 2,408,179 Patented Sept'. 24, 1946 Thomas Tulsa, Okla., J. séhuetz Aassignors, and by Edwin mesneW.assignments, 'rúmqùist A o John E. ÄMabee,.,'Ihon'nas J. _S'chi'xetz,` and Logan Stephenson, all of Tulsa, Okla. I. y l ‘ `> 'ApplicationJuly 10, 1945, Serial No. ,'604202 ' - 'facial-rms. (criss-s2) circular track ~2-Iengaged by yrollers 22„«positioned ~- rlî‘his invention relates Ytoimprovements.in fric-> ‘ tion brakes and more -p_articularly’to automatic .brakes for use `with a Worm drive >of a hoisting J apparatus. .-A brake of this -ftypeis shown in the in notches 23,` arranged in spaced relation about the periphery of ya roller carrierv or clutch member T. J .'Schuetz Patent 1,870,532, August 9, 1932, and the shaft, as indicated at 25, and is Yprovided with the action and function. of the improved brake y tangential Wells 26 for the reception of coil springs 24. - AThelatter is keyed to the extension I0 of 'is similar to that disclosed in said patent. 21 that force- pistons 28, guided by the.. Wells, ~. 'v vOne of the objects of the present invention is against the rollers22 and force them toward the inclined end surface 29 of the member 24. It will f to provide'. improved means for use in adjusting the brake elements. 10 be Yobvious thatthis construction will permitthe ' Another object is to'supply improved spring shaft and roller carrier to travel counter-,clock . means for forcing friction discs into tight engage wise (Fig. 5) vwithout moving the race ring I1, but ment with one another, and novel means for ad should the shaft attempt to turn inthe opposite direction, the'spring-pressed pistons would cause' justing the. spring means from theexterior of -' the apparatus. " l the rollers. to move` up the inclined surfaces of .the - .notches and .thusbind the rollers against the race ring I1, for braking purposes, as will be explained With the foregoing objects outlined and With other objects in View, which will appear as the description proceeds, the -invention consists of the novel features hereinafter described in detail, illustrated in the accompanying drawings and more particularly pointed out in Íthe appended claims. lIn the drawings: ` - ' ' _ further. „Another friction ring 30 bears against the outer side ofthe disc I9, and a pressure plate k3| bears „ against the opposite side of the plate „30. ' the ring I2 to effect friction between the brake - Fig. 1 is- an elevation of an end portion of the l new braking mechanism.- 1 y Fig. 2 isa vertical longitudinal sectional View taken on the line 2-2 of Fig. 1. , The pressure plate is yieldingly forced toward A. d I Fig. 3 is a horizontal sectional View on the line 3-3 of Fig. 1. Fig. 4 is a transverse sectional View on the line 30 4-4 of Fig. 3. Figs. 5 and 6 are similar views on the lines , 5-5 and 6--6 respectively of Fig. 2. parts, by means of a leaf spring' 32 which may have its medial yportieri secured -to a bolt 33 by meansof clamping plates '34 mounted on the bolt. The ‘bolt is> arranged co-axial with the shaft and the Aends of lth'e leaf spring constantly bear upon the pressure' disc at 3| at Adiarnetrically opposite points. f For the purpose of moving the bolt toward and ' away from the shaft, the threaded portion 35 of the bolt engages internal threads 36 in a nut 31 which has a cylindrical portion 38 swivelled ventional hoisting machine housing containing 35 in a cylindrical bore 39 of a cover 40. At this point, it will be noted that the parts I2,- I4 and a worm gear shaft 8, the worm gear 9 of which 40 may be secured together by any suitable means, is arranged for engagement with the drum gear Referring to the drawings, 1 designates a con such. as screws 4I, which extend through aper (not shown). In accordance with the present in tures 42 in these parts and are anchored in the vention, the shaft 8 is extended and projects be _ ' yond the boundaries of the housing 1., being re 40 housing 1. To prevent relative turning of the pressure plate duced at its end portion I0 (Figs. 2 and 3). The 3| and cover 40, the former is provided with lugs shaft is j ournalled in a suitable anti-friction-bear 43 which may vbe welded to the plate and project ing I I, mounted in a ring I 2 which extends snug outwardly into bifurcations 44, provided at the ly within an aperture I3 of the housing. A stationary housing collar I4 projects from 45 inside of the cover. The cover is preferably pro vided at 180° to the bifurcations 44 with diametri the ring and arranged within the collar is a fric cally opposite bifurcations 45 (Fig. 4) which serve tion disc I5, bearing at one side against the outer as confining means for the leaf spring. surface of the ring I2, as indicated at I6. A race For adjustment purposes, an adjustable disc 46 ring or clutch casing I1, also positioned within the collar, is arranged between a pair of friction 50 is arranged at the exterior of the cover and con nected to the latter by screws 41 which extend discs I8 and I9 that project radially beyond the through substantially semi-circular slots 48 in the race ring and are iixedly connected to one an other by rivets 20 or the like which extend'through disc and are anchored in the cover. The central portion of the disc is provided with an angular the outer race ring. As shown in Fig. 5, the race ring has an inner 55 aperture 49 to snugly receive the angular head 50 2,408,179' Y 3 4 plurality of friction plates secured together with of the nut 31. Due to this construction, it will a clutch casing interposed therebetween, a clutch member fixed on the shaft and rotatable there be understood that if the disc 46 is turned in one direction, the medial portion of the leaf spring with, within said clutch casing, said clutch be will be moved toward the shaft 8 to increase the ing adapted to rotate freely in one direction and engage said friction plate lunit when force is ap plied in the reverse direction, and a pressure friction between parts I5, I 8, I9, 30 and 3|, but if the disc is turned in thel opposite direction, the friction will be reduced. member adapted to normally prevent the rota It will be observed that the parts are so con tion of said unit, the improvement comprising structed and arranged that lubricating oil from within the housing -I may ñow to and from the 10 a cover for the housing having a central aper ture, a nut rotatably mounted in said aperture, a braking mechanism, and that gaskets 5I are em- ` disc fixed to the external portion of the nut for ployed, where necessary, to prevent the escape of rotation therewith, means for locking the disc oil. r to the cover, a bolt having threaded connection From the foregoing, it _is believed that the construction, operation and advantages o-f the 15 with _the nut, a leaf spring having its end por tions operatively connected to the pressure mem improved mechanism may be readily understood ber andV its medial portion secured to the bolt, by those skilled in the art, and we are aware and means for preventing the pressure member changes may be made in the details disclosed, and vspring from turning about the axis of the Without departing from the spirit of the 'inven tion, as expressed in the following claims. 20 shaft. ' 3. In braking mechanism of the character de ' scribed,:a pressure member, a housing in which What we claim and desire to secure `»by Letters Patent is: - » , « Y i the pressure member is arranged, a nut rotat 1. In a friction'braking mechanism of the type ably mounted in a wall of the housing, a disc comprising a shaft having a portion arranged within a housing, a friction plate unit in the 25 arranged at the exterior of the housing and op eratively connected to the nut for rotating the housing surrounding the shaft and comprising a latter, means for locking the disc to the housing, plurality of friction plates secured together with a bolt having threaded connection with the nut, a clutch casing interposed therebetween, a clutch a leaf spring having its end portions operatively member fixed on the shaft and rotatable there with, within said clutch casing, said clutch be 30 connected to the pressure member and its medial portion secured to the bolt, and means for pre ing adapted to rotate freely in one direction and venting the pressure member and spring from engage said friction plate unit _when force is ap turning about the axis of the bolt. plied in the reverse direction, and a pressure 4. In friction braking mechanism of the char member adapted to normally prevent the rotation acter described, a pressure member, a housing in of said unit, the improvement comprising a leaf 35 which the pressure member is arranged, a thread spring having its ends operatively connected to ed member rotatably mounted in a wall of the the pressure member, and meansV operable from housing, a disc arranged at the exterior of the the exterior of the braking mechanism for ad housing and connected to the threaded member justing said spring to increase or decrease pres for rotation therewith, means for locking the sure of the spring on the pressure member, said 40 disc'to the housing, a second threaded member means including a threaded member, and a rol tatable disc o-perably connected to the threaded member and arranged at the exterior of the brak ing mechanism.` . 2. In a friction braking mechanism of the type f comprising a shaft having a portion arranged within the housing, a friction plate unit in the housing surrounding the` shaft and comprising a having threaded connection with the iirst thread ed member, and a leaf spring having its end portions operatively >connectedrto the pressure 45 member and its medial portion secured to the second threaded member. Y THOMAS J. SCHUETZ. EDWIN W. TURNQUIST.