Патент USA US2403638код для вставки
July 9, 1946- A. D. CLARK’ ‘2,403,638. THRASHING MACHINE Filed ‘Nov. 26, 1943 Q J?ve?ibr: .A. D. Clark 2,403,638 Patented [July 9, 1946 . UNITED STATES PATENT, OFFICE} I ~ I ' ‘~ ' THRA‘SHING hammer-,8; MACHINE , f . f '- t . “- ‘Andrew- Douglas'Clark, Pietermaritzburig, Natal," _ p . -:' ~' 1 H 7 Union of South Africa .> ApplicationNovember 26, 1943, Serial No. 511,839 ‘ V In the Union: of South Africa-'May .3_Claimsi., . This § invention relates to improvements in thrashing machines and has referencelto ama- ' chine particularly adapted for the purpose of thrashing beans, peas and like crops although it isbyv no means limited to this speci?cuse andv may accordingly‘ be used ,for thrashing; many other farmcmps- , . ‘ . . . An object of the invention is to provide a ma: 1943 ' I’ a , tion, extends from a point near the top of the ' drum casing to a‘ point substantially in line horizontally with the ‘axis thereof, or a short distance below said axisand is arranged on the side ofv the casing substantially opposite to a feed opening therein by means of which the crop to be thrashed is fed vto the machine,’ _ It is to be understood, that-the beaterdrum is rotated in a direction so- that. the motion. of centage of seeds or kernels which are broken in 10 its top side is from said feed opening towards the ?xed “concave” bar assembly. the course of the thrashing operation. . In a preferred construction the ?xed bar mem The invention is an improvement in the well bers forming the “concave” assembly, are ar known general type of thrashing machine in chine which will reduce to a'minimum the per which the actual thrashing operation is effected ranged in pairs with the spaces between each by a rapidly rotating drum which coacts with 15 pair substantially greater than the spaces‘be tween the bars forming each pair. a ?xed “concave” of arcuate, grid or cage for Both the ?xed and rotating rubber-covered mation positioned in outwardly spaced relation bars are readily replaceable such as by being in ship with the path of a plurality of spaced beater the form of metal rods or pipe lengths, having elements attached to the drum; in which the crop to be thrashed is fedinto the space between the 20 a screw thread on at least one end thereof With which a nut or nuts co-operate for ?xing said path of said beater elements and the “concave” ends in holed brackets, lugs or the like project through a suitably positioned feed opening to ing from the beater drum. wards the top of the drum casing, and in which To enable the invention to be more clearly the thrashed grain and husks are discharged through‘an opening in the bottom of the casing 25 understood and carried into practice, reference is now made to the accompanying drawing, in “ onto suitable sieving and winnowing means. According to the invention a thrashing ma ‘ which like references denote like parts through out the several views. chine for the purpose and of the kind set forth, In the drawing: is characterised in that the actual thrashing oper ation is effected by means of a rotating drum 30 Fig. 1 is a part-sectional vertical elevation of member which is provided with a plurality of cir a thrashing machine constructed according to cumferentially spaced beater bars arranged par the invention. allel with the axis thereof, which beater bars Fig. 2 is a fragmentary vertical sectional view have at least their contact surfaces covered with ~ of the rotating drum member and easing, of Fig. or made of rubber or equivalent resilient material, 35 1, but drawn to a larger scale. and are arranged to rotate in inwardly spaced ' Fig. 3 ‘is a fragmentary end view of one-of relationship with a plurality of spaced similarly the beater bars and its supporting lug, and covered or constructed co-acting ?xed “concave” bars, arranged towards the upper side of an en closing casing having an outlet opening in the bottom side thereof for the discharge of the Fig. 4 is a part-sectional shortened View of the beater bar and lugs of Fig. 3. 40 Referring to the drawing reference I denotes a casing having a feed chute 2 and a bottom dis thrashed grain and husks onto suitably posi charge opening 3 through which the thrashed tioned sieving and winnowing means. grain and husks fall onto the usual sieving and More particularly the beater and “concave” winnowing means denoted generally by the ref bars all consist of cylindrical members each cov 45 erence 4, the whole assembly being supported in ered with a rubber sleeve or layer. The beater bars are arranged in equally spaced relationship around the drum, and are secured in outward a frame 5. Mounted on a shaft M for rotation within the casing I, is the drum 6 to which are attached, by means of the lugs 1, the six spaced beater bars thereof by means of radially projecting brackets 60 8, which are arranged so that they rotate close or lugs, preferably ?xed to the ends of the drum to the three spaced pairs of ?xed “concave” or formed integrally therewith. bars 9, which aredisposed within the casing l, The said ?xed “concave” bar assembly com as more clearly shown in Fig. 2, so that the lower posed of a plurality .of spaced rubber-sleeve-cov bar of each pair is nearer the path of rotation ered bar members and arranged in arcuate forma radially spaced relationship with the periphery 2,403,688 3 of the beater bars 8 than the upper bar 01' each 4 pair. than the other bar and being located for coop eration with the bars of the rotary drum. Both the beater bars 8 and the ?xed “concave” bars 9, are each provided with a rubber sleeve In as more clearly shown in Fig. 4. ,Each of the said bars preferably consists of a length of metal piping II, threaded over a rod [2, having nuts 2. In a machine of the character described, the combination of a. rotary drum, brackets on the end walls of the drum, bars having a resil ient outer covering secured to the brackets in outwardly spaced relationship with the periph l3 on its screw-threaded ends by- which‘ the bars ery'of the drum, a casing surrounding the drum, are ?xed to'the lugs l or, in the case of the ?xed and pairs of bars each having a resilient outer “concave” bars, to the end walls of the casing I. 10 covering secured to the inner wall of the casing With a machine in which the diameter of the with one bar of each pair spaced farther away path of rotation of the beater bars 8 is about 18 from the wall of the casing than the other bar, inches, the speed of rotation for the drum is gen both of the bars having a resilient outer cover erally 550 to 600 R. P. M., while'i’or thrashing ing for cooperation with the bars of the drum. beans, peas and like crops, the speed is prefer 15 3. _In a machine of the character described, the ably about 420 R. P. M. ' > combination of a rotary drum, brackets secured An adjustable lip plate [5 projecting from, the _e to the end walls of the drum, bars mounted on bottom side 01.’ the feed chute 2, guides the crop the outer ends of the brackets, metal sleeves sur to be thrashed into the path of the rotating rounding the bars and rubber tubing surrounding beater bars 8. 20 the metal sleeves between the brackets, a casing What I claim is: surrounding the drum, and pairs of bars each hav 1. In a machine of the character described, ing a resilient outer covering secured to’the inner the combination of a rotary drum, brackets on wall of the casing with one bar of each pair closer the end walls of the drum, bars secured to the to the wall of the drum than the other bar of brackets in outwardly spaced relationship with 25 each pair, both of the bars of each pair compris the periphery of the drum, a casing surrounding ing a metal rod secured to the casing, a =metal the drum, and pairs of bars secured to the inner sleeve surrounding the rod and a tubular rubber wall of the casing, with one bar of each pair at cushion surrounding the sleeve. ' a greater distance from the wall of the casing _ ANDREW DOUGLAS CLARK.