Патент USA US2403607код для вставки
July 9, 1946. H. oGAKRD v.-BELT CONSTRUCTION 2,403,607 Fìled'Dec. 21, 1942 wßz 8.-.liïm» 1..26. /2 _ /\ ¿www w @i 5//, @m z, @w 2 / .a 2 fiar/enfer gegner' @ard @M411 f‘ fz: Patented July 9, i946 2,403,607 UNITED STATES PATENT OFFICE; V-BELT CONSTRUCTION Helmer Ogard, Chicago, Ill., assignor to Arm- l strong-Bray & Co., Chicago, Ill., a corporation of Illinois Application December 21, 1942, serial No. 469,588 s Claims. (C1. 74-23`6> 1 This invention relates to belts of the-so-called V-type having tapering side walls which friction ally engage complemental walls on driving and driven pulleys or sheaves. Ordinarily, such belts are composed of rein forced rubber and molded as a single integral the invention _as expressed- in the .appended claims. l The_improved belt shown isfcfv the typev in Y which side surfaces Ill composed ofwrubber, syn. thetic rubber, >or friction material havingY com parable physical properties taper and converge toward each other sojas to fit intothe V-groove piece. These are subject to well recognized objections such as stretching inservice use which in a pulley or` sheave. Il. Inpassing around the necessitates replacement or adjustment and in pulley, the belt becomes compressed between‘t-he multiple belt drives results in uneven distribu 10 groove ywalls l2 with suflicientforce to transmit tion of the load. Single piece belts are difficult vthe torque withoutÀ substantial slippage. to install in certain machines and must be stocked l In accordance withv thefpresent’invention, the in large quantities because of the many sizes and belt surfaces Ii! `constitute the opposite `sides of lengths in which they are used. relatively short molded blocks I3 which have-a The general object of the present inventionl 15 generally flat bottomjsurface I4 andpreferably is to overcome these andother disadvantages a bulging 'outer surface 'I5;v ,The‘y blocks are through the provision of a V-belt composed of hollow and arranged in ~end-to-end relationfalong detachably connected sections. ~ . an endless flexible chain vcomprising relatively Another object is to provide a V-belt in which short detachably'connected links I6"which are the driving force is transmitted by a flexible 20 composed of metal such as heat-treated steelk so non-extensible chain frictionally connected to that the chain is non-extensible.> " ' the sheaves through a series of V-blocks car ' The individual chain links are flat atoneend ried by the chain links and composed of resilient and bifurcated at the other to receivethe flat friction materialsuch as rubber. . endfof the adjacent link'. ' `To-enable the links to A 'further object is to provide a novel connec tion between each chain link and the associated be punched from sheet metal, each is vcomposed yof two pieces I8, lyinggagainst each other> at V-block. , t their flat ends I9 and spaced apart at the bent vThe invention also resides in the novel struc ends ZIJ.> Both ends are apertured to snugly `tural character of the parts which facilitates receive a pivot pin" 2l whose :ends 22 project molding of the V-blocks and the formation of 30 laterally a short distance beyondthe outer sur the metal parts as sheet metal stampings. faces of the link ends 20L vIf desired, the'pi'n Other objects and advantages of the invention may be composed of bronze or-other bearing will become apparent from the following detailed description taken in connection with the accom metal'. The links ‘ I6 extend ` 'looselyV ' through Y holes f 23 panying drawing, in which Figure 1 is a fragmentary side elevational view molded in the blocks I3 centrally ’thereof'and having enlarged end recesses to receive the over of a V-belt embodying the present invention, one lapping ends of the' adjacent links. >Concave belt pulley being shown in section. recesses 24 are 'molded in opposite ends of the Fig. 2 is a Yfragmentary plan view of the belt. blocks to receive> the pin> ends 22 and thus per Fig. 3 is a section taken along the line 3_3 40 mit the blocks to be located close together vwith of Fig. 1. ` the pins 2l disposed between’them. In longi tudinal cross-section, the end surfaces 25 ofthe blocks converge inwardly to a» small degree to Fig. 6 is a perspective view of one of the permit bending of the belt around the pulley V-blocks. 45 in spite of the close spacing of the blocks. Fig. 7 is a perspective View _of one of the but-k »The blocks I3 may be composed of solid rubber tress plates. or like -material and need not-incorporate rein While the invention is susceptible of various forcing cords because the driving _force' is‘trans modifications and alternative constructions, VI mitted by the metallic chain; The increments have shown in the drawing and will herein de- f' of this force derived frictionally at‘the ‘surfaces scribe in detail the preferred embodiment, It is IIJ ofthe respective blocks are transmitted in to be understood, however, that I do not intend dividually to the chain links I6 through the me Figs. 4 and 5 are sections taken' respectively along the lines ll-Ll and 5_5 of Fig. 3. to'limit the invention by such disclosure but aim dium of the projecting pin ends 22. These have to cover all modifications and alternative con bearing engagement with buttress plates 26 which ~ structions falling within the spirit and scope of s are of the same general shape as the end sur 2,403,607 4 3 other end to receive the adjacent link, pins piv otally connecting the overlapping ends of said faces 25 of the blocks but are slightly smaller in area so as to allow for compression of the blocks in the pulley grooves. The plates are deformed links with their ends projecting laterally from the links, blocks of friction material each carried by as indicated at 21 so as to seat in the block re cesses 24 and provide recesses on the other side one of said links and having end recesses receiving said overlapping ends, plates each abutting one end of each block and having depressions there in yproviding seats for the projectingT ends of said for reception of the pin ends 22. There are two plates 26 between each adjacent pair of blocks I3 and these are arranged with their deformed portions 21 disposed in the recesses 24 of the dif pins, and means formed on said plates and act ferent blocks. One plate of eachpair lies in full contact with the block ends 25 to which the in crement of the transmitted force is thus distrib uted evenly. Beyond the ends of the .pins 271, one plate 25 of each pair is deformed toa lesser degree. ing to hold said pins against endwise displace ment. 4. A V-belt comprising a succession of aper tured blocks having tapering side walls, a suc pin ends 22 and prevent any possible endwise dis placement of the pins. In assembling the parts, the blocks are compressed sufficiently to -permit entry of the pins through the chain links past one of the plate portions 28. Thereafter, the resiliency of the blocks serves to hold the plates ing said links and having projecting ends, and a plate interposed between each of said .pins and the end of one adjacent block, each plate abut ting against said adjacent block and having ,bearing engagement with said ends of the asso tightly against the pins. 5'. A V-belt comprising a succession of aper tured blocks having tapering side walls, a succes sion ci links each extending through and sup Cession «oî links each extending through and sup so as to provide portions 28 which engage the 15 porting one Qi Said blocks, pins pivotally connect ciated pin. It will be observed that the belt constructed> as above described may be made up in any desired porting one of said blocks, pins pivotally connect ing said links and each disposed at the junc sections, The maintenance of a large stock of tions between two adjacent blocks, and a plate different belt sizes is therefore unnecessary interposed between each of said pins and the end Since the links are connected detachably by the of one adjacent block, each plate abutting against pins, the belt may be assembled readily in lani7 machine and this, without the use of special fas 30 said, adjacent block and having bearing engage teners. The chain being-non-extensible and uni ment with the _associated pin. 6. A V-belt comprising a lplurality of chain form in length forA any' given number of sections, links each having a bifurcated end straddling the the belts will not stretch and, when used in mul length simply by selecting thevproper number of tiple, will always carry equal parts of the load. other end of the adjacent link, cross-pins pivot Through the use of the buttress plates 26 and by connecting each block I3 to thev chain, n0 one block is stressed unduly, and the total driving force is sustained by the chain. While I have shown and described herein-a . ally connecting the overlapping ends of said links single belt embodying the features of the present invention, it will be understood that the inven tion is equally well adapted to belts for both single and multiplebelt drives. I claim asmy invention: 1. ,A V-belt comprising a, plurality of chain links» each having a bifurcated` end straddling the other end of- the adjacentlink, cross-pins piv otally connecting the overlapping ends of'V said links with their ends projecting laterally from the links, blocks of yieldable friction material each 50 carried by one of said links and having end re cesses; receiving said overlapping» ends, and a but tress plate disposed between the ends of adjacent blocks and having depressions therein providing seats for said pin;V ends, whereby» the frictional ` forces applied to said blocks will be transmitted to said pin through the medium of> said plate. with their ends projecting laterally from the links, blocks of yieldable friction material each carried by one of said links and having end re cesses, receiving sad overlapping ends, and a but tress ,plate or plates disposed between the ends of adjacent >blocks and having depressions there in providing seats for. said pin ends, whereby the Africtional forces applied to said blocks will be transmitted to said .pin through the medium of sad plate or> plates. '7; A V-belt comprisingv a plurality of longi tudinally arranged links, pins v‘pivotally connect 'ing- ¿the ends ofl >said links, blocks of yieldable fric tion material carried by the respective links, and Vlbuttress'~plates> abutting the ends of said blocks and yhaving portions extending over the ends of the pins to hold the pins against endwise dis placement, saidY blocks ‘being compressible to `per mit shifting of said portions of the plates away from the ends of the dpins for removal and inser tion of the latter. 8. A V-belt comp-rising a plurality of longi 2. A V-belt comprising a plurality; of chain tudinally arranged links, pins pivotally connect links each comprising two sheet metal pieces dis ing the ends of said links with the ends of the posed sidev by side at one end and spaced apart 60 pins projecting laterally from the links, blocks .at the other end to receive the adjacent link, pins of yieldable friction material carried by the re pivotally connecting the overlapping ends of said spective links, and buttress plates abutting the links with their ends projecting laterally from ends of said blocks and having depressions there the links, blocks of friction material each carried in to receive theÍ projecting ends of the pins with by~ one of said link-s and having end recesses re the portions of the plates adjacent said depres `ceiving saidy overlapping ends,; and; plates each abutting one end ofV each block and; having de pressions therein providing seats'> of the project. ins ends. Of said pins, sions shaped to extend over the ends of the pins to hold the latter against endwise displacement, the plates being shiftable by compressing said lblocks to Vmove said portions away from the ends 3-. A V-belt comprisinsfa plurality or- enam links 70 of‘the pins to permit removal and insertion of the eachV comprising tWQ sheet metal piecesv disposed Side by sida at one and and spaced aparaat the latter. HELL/IER OGARD.