Патент USA US2406230код для вставки
Aug, 20, 1946. _J. EyLlLYL ~` - _ ~ 2,406,230 TRACTOR sPRocxET DRIvE ’ Filed sept. 4, 1944 3 Sheets-Sheet 1 ` Aug. 20,` 1946. J. E. LILL . TRACTOR -sPRocKET’DRI-VE Filed sept.' 4'.« 1944 2,406,230 s sheets-sheet z /03 ~ H54 a5 77 Patented Aug. Z0, 1946 2,406,230 UNITED STATES PATENT OFFICE 2,406,230 TRACTOR SPROCKET DRIVE .la-'nies E. Lili,v Los Angeles, Calif., assigner to Food >llíachinery Corporation, San Jose, Calif., a corporation of Delaware Application september 4, 1944, serial No. 5 Claims. 1 . 2 laying mechanisms to withstanding the shocks mentioned hereinabove. This invention relates to power `transmissions and is particularly useful i' inl driving a drive sprocket inv a track laying vehicle-.__ n l I l The manner of accomplishing the foregoing cb~ Track laying mechanisms are employed on com jects as well as further objects and advantages will be made manifest in the following descrip tion taken in connection with the accompanying mercial tractors and military tanks and amphib~ ians and each of these includes a ñexible endless track which is trained about front and rear drive drawings in which: ` and idle sprockets, and aseries of bogie wheels Fig. 1 is a fragmentary diagrammatic plan View of an amphibian incorporating a preferred, em~ bodíment oi the track laying mechanism of my which ride on the lower flight of the track and thus supptitthe vehicle. i i To increase the service performance character invention, and is partially broken away substan~ tially as indicated by line I-I of Fig. 2 to reveal istics 0i tractor type military vehicles the nach ing sprockets in the track` laying mechanisms the internal construction of said amphibian. thereof are placed forward to a point where these Fig. 2 is a side elevational view Vof Fig. 1. inevitably receive severe shocks due to the vehi 15 cle nosing into dirt embankments, rocks orl other Fig. 3 is a vertical sectional view of the tracn tor sprocket drive of my invention taken on the line 3_3 of Fig. l. Fig. 4 is a horizontal sectional View on stepped levels as indicated by the line 4-4 in Fig. Alï'ig. 5 is _a perspective vien/'showing the main obstacles in the effort to push these out of the way or ride over them. In certain vehicles it has been found advantageous to drive the track >lay ing mechanisms from the leading' sprockets and a problem is here introduced of placing the drive gear housing of the invention. ‘ sprockets far enough forward so that the tracks, where they pass around the drive sprockets, will a Referring speciñcally to -the drawings the in engage and have traction on an embankment or other obstacle into which the> vehicle is nosing. 25 It is an object of this invention to provide a mounting for a tractor drive >sprt'ncket which may _ ,y u u . Assembled upon the sides L2 to extend outward» lytherefrom are ponto'ons ’2B -each of which has a front wall 2l, top wall 22, a bottom wall 23, advanced position to prov1de traction on an ob- l vention is disclosed‘as inco?pcrated with an am phibian il! comprising a hlïll l í having sides l2, arcurved bow i3, a bòttoin ini and a stern plate 1_5.> Provided in the hull H is a pilct’s compart meetic be mated ai; the _from eric or the traer laying mechanism and which _ne set in a sufficiently stacle as mentioned. '552,684 v (ol. isc-9.1) , It is another object of this invention to?pro a rear wall 24 and an outside wall 25. Mounted on each of the pòntoons 2D is a Vtrack laying ing -for the sprocket which will employ the `Inla land-traction and water-pro ulsion mechanism 3B which includes aseries of bog'ie wheels 3i which vide a tractor sprocket drive emb'odying‘a mount; terial used therein to especial advantage in with~ are »rotatably supported in any prefered manner ' standing shocksirom ramming against obstacles. on the pontoon ,bottom 23. Each such mecha In a common type of tractor 'amphibian known as the “Water Buffalo” the sides offthe hull are provided with pontoons which lie within `the end less tracks of the track laying mechanisms. The 40 rear ends of these pontoons are employed for mounting the idle sprockets of the track laying said pontoons. ' It is another object of this invention to pro vide a tractor sprocket drive on which the drive sprockets in said “Water Bulïalo” may be mount ed and these sprockets driven "from, 'the ‘front ends of said pontoons, thereby interposing a rigid compression structure between the v.front 'and rear sprocketsof eachv track laying _mechanism which 'endless double chain track 3d whichV is` trained about the sprockets 32 and 33 and the bogie wheels 3| mechanisms. Heretofore, the drive sprockets of these amphibians have been mounted on bell hous ings extending laterally from the hull ahead of nism also includes a double idle sprocket 32, and a double drive sprocket A33, these sprockets being I located at opposite ends of the hull Il, and an The double idle "sprocket 32 is rotatable on a 45 b'ase B which is slideably mounted on the rear end ofthe pontoon V2l) `(see Fig. ì2) and is shift able horizontally by a jack "40 to loosen or tighten the endless track 34. ` Ó The `double drive sprocket 33 of this invention is mounted on the frcnt end of the pontoon 2r] ’so as to provide a continuous compression mem ber which lies along and on opposite sides of the ’axisi of thei operational compressive vforces applied I _l by the track 34 to the two double sprockets >32 and will greatly increase the capacity of thèse track 55 33,7tending toiorce one vvof >these towards ’the other. Such compressive ¿forces >include ‘strains 2,406,230 driving of the track or shocks caused by the caused by head on collisions with obstacles in laying mechanisms 30 of the amphibian I0. One such instance is where propellers are mounted in these pontoons in the manner and for the pur-= includes a drive sprocket mounting and driv ing device 4| which is mounted on the front pon pose disclosed in the co-pending application ci James M. Halt, Serial No. 554,989, ñled September 20,The 1944.box 6| of the power take-off unit 62 sup toon wall 2|. These devices are reverse dupli cates of each other so that a description of the ports bearings |02 and |33 in which is journaled a shaft |04 carrying a bearing |65 on which’a left device which follows will suiiice for both. clutch gear |65 is freely rotatable. Splined on Y The left device 4| includes a main housing the shaft |54 is a clutch collar |61 which is shift able by a yoke |08 into and out of clutching en the path of the amphibian l0. l To eifect this purpose, my invention preferably casting 42 having an attachment flange 43 Yby which the casting 42 Yis secured to the front pon-` gagement with the gear |66. toon wall ‘2| as by bolts or rivets. The housing 42 has a top wall 44 anda bottom wall 45 ex The yoke |68 is fixed on a slide shaft |69 mounted in the box 6| and shiftable by a manually controlled lever H6. tending forwardly from the flange 43` and uniting with a curved front wall 46. The walls 44, 45 Vand 46 are united integrally by side walls 41 Fixed on the inner end of the shaft |04 so as to mesh with the bevel gear 96 is a bevel pinion H5. The box 6| also provides bearings ||6 and |i1 for a power take-olf shaft ||8 having a pin which are provided with pairs of axially disposed " holes 48 and49. 42 also includes a compartment 20 ion ||9 which meshes with the gear |06. Each device 4| may be lubricated by the splash The ' housing system, To effect this and for .inspection pur 56 extending rearwardly from the perimetric poses, the housing 42 is provided with an oil baf flange 43'a'nd having an upper wall 6|, a bottom fle |20 and with plugged ports |2| and |22 through wall 52 and a rear wall 53 which are connected by side walls 54, the latter having coaxial open 25 which oil may be introduced and the mechanism ings 55 therein. inspected when desired. ‘ The rearrwall 53 is provided with an opening 56. This opening is adapted to receive a neck Operation With the above description it is believed clear that each device 4| mounted, as it is, right on the head end of one of the pontoons I26, provides a rigid-support for its drive sprocket 33 and re 69 of a'box 6| of a power take-off unit 62. VThe invention is adapted to be employed with or with out the unit s2y and when this unit is dispensed with the opening 56 is covered with a suitable ' sists head-on shocks imposed on the drive sprock plate. . et with forces which are disposed symmetrically The double drive sprocketl 33, which the device 4| is provided for mounting and driving, com 35 with respect to the axis along which the shocks are imposed. It is evident that for the amount prises individual sprockets 65 having splined hub of material employed in the drive sprocket sup sleeves 66 which extend into and mesh with an port4l, this is very much stronger and more able ` to resist such shocks than thefbe'll housing sprock- . 61 by a bolt 66 which also traps bearings 16 be~ 40 et supports in previous use and referred to here tween the hub 61 and the sprockets 65. inabove. In operating the amphibian Iû the pilot utilizes Secured to the side walls 41 of the housing the transmission `|l6>to selectively drive the port 42 so as to close the openings 48 therein and internally splined >hub 61 of a gear 68. The sprockets 65 are held in assembly with the hub rigidlyV position the. assembled sprocket 65, gear and starboard track laying mechanisms 36. Each wheel 68 and bearing 16, are cover plates 15.1 Secured in the openings 49 by plates 16 isan - of these mechanisms are driven, of course, by idle shaft 11 on which is provided a bearing 18 nection withI the pinionïßß so that the latter ro mounting a countergear wheel 19, the latter Y Vmeshing with the gear wheel 18. Fixed to the outer side wall 54 andr extending into` its opening 55 is a bearing support cap -60 in which tates with this shaft. Through this pinion’s meshing with gear 18, and the latter meshing with gear 68, the sprocket 33 is rotated. When lthe devices 4| are employed on amphib a bearing 8| rests. Fixed to the inner side wall ians it is, of course, desirable that these be as light as possible while, at the same time, have ~ 54 so as to extend into the inner opening 55 is a Y rotation of its shaft 9| which has a splined con` the necessary’strength. For this reason I prefer cap S5 which houses bearings'ßß and 81. Rotatably mounted in the bearings 3| and 55 to cast the housing 42 of each of these devices , from steel. The cover plates 15, the bearing 86 is a sleeve 88 having a pinion gear 89 formed support caps 8|! .and 85 and the power take-oif thereon as well as a bevel gear 90. kThe pinion box 6|, I find may advantageously be made of a gear 68 meshes with the countergear wheel 19. The interior of the sleeve 83 is splined and a dif suitable aluminum alloy. ' ferential drive shaft 9| which is internally splined 60 When the devices 4| have power take-off units extends into the sleeve 88 in splined driving rela 62 associated therewith, as shown in theV draw ings, power may be transmitted from the take tion therewith. The shaft 9| also journals in the oii shafts ||8 through drive rods |25 to what bearing 81. A suitable packing ring 92 is pro vided in the cap 85 about the shaft 9 |. ` y The shafts 9| of the two mounting and driving devices 4| connect through universal joints 93 ever mechanisms require driving. The claims are as follows: ` 1. In a tractor type vehicle, the combination f 94 and 95 with a selective gear of: a double tractor drive sprocket having spaced transmission 96 to which power is delivered individual sprockets `connected axially by hub through a drive shaft `91 from an internal ‘com means; spaced bearings surrounding said hub means between said individual sprockets; a hous - and drive rods bustion motor (not shown). VThe mechanism already described in detail may be employed, for mounting and driving the dou ble drive sprockets 33 without the power `take Y This unit 62 is employed whenever »off unit 62. it is desired to supply power within the pontoons 15 20 concurrently with the driving lof theïtrack ing extending between said individual sprockets and providing-a mounting for said bearings; means disposed radially outside the periphery of said double sprocket for rigidly supporting said housing.; and means extending into said housing ,v 5 2,406,230 and operatively connected to said hub means for rotating said double sprocket. 2. In a tractor type vehicle, the combination of : a double drive sprocket including spaced in dividual sprockets connected by a hub; a double idle sprocket comprising spaced individual sprock ets connected by a hub; a flexible endless track trained about said double sprockets; bearing 6 of: a double drive sprocket including spaced in dividual sprockets and axle means connecting said individual sprockets together; spaced »bear ings surrounding said axle means between said individual sprockets; means lying between said individual sprockets and extending towards said bearings from a position disposed radially outside the periphery of said sprocket for rigidly support- » means for said hubs; a compression structure dis posed between said drive sprocket and said idle 10 sprocket and lying on opposite sides of the plane said axle means between said bearings for rotat bisecting the space between said individual ing said double drive sprocket. . sprockets;.means on said compression structure 4. A combination as in claim 3 in which said extending between said individual sprockets of axle rotating means includes a gear mounted on each of said double sprockets and rigidly sup said axle means between said bearings. porting the bearing means thereof on said com 5. A combination as in claim 3 in which said pression structure; and means extending from drive means comprises a train of gears, one of said compression structure into the space between which is mounted on said axle means between said the bearings of said double drive sprocket for bearings. rotating the latter. 20 3. In a tractor type vehicle the combination JAMES E. LILL.