OA19637A - Cassava harvesting machine. - Google Patents

Abstract

CASSAVA HARVESTING MACHINE, classified as a dragging type with means for coupling to a conventional tractor (T) and for activation by its hydraulic pump, comprising a crosswise chassis (1)/ being its front medium side provided with coupling means (2) to the three-point engaging system of a conventional tractor (T) , also integrating a working point (3) and an upper structural complement in the form of a head (4), below which there is a double wheel (RI) and, above that, said head (4) has means for crosswise coupling the upper rear edge of a plucking cart for cassava (5), which lower edge is provided with simple side wheels (R2) and a respective height régulation device (D), while its upper edge ends over a conveyor belt (6), also crosswise, extending itself over the crosswise chassis (1) and ending over a cube-shaped compartment (7) which base is defined by a sliding ramp (8) for supporting the bag while loading and unloading the bag (B) when full.

Description

CASSAVA HARVESTING MACHINE

Field of the Invention

[1] The invention refers to an agricultural machine, especially projected to pluck or pull out and harvest cassava. It is a machine classified as a dragging machine, with means for coupling to a conventional tractor and being activated by its hydraulic pump. The machine has various sets activated by hydraulic engines, and consequently they are adequately linked to the conventional hydraulic center of a known tractor.

State of the art

[2] There is currently a considérable variety of machines with resources to pluck and harvest cassava and other similar roots, such as those taught by the following documents :

BR10201402665 - February 3, 2014 - Peeling machine for cassava in general, with a unique and spécifie frontally towed structure, with a hydraulic system, and based on a belt-pulled set and a knife cutting set, both positioned in a châssis, aiming to facilitate, in an extremely practical, safe and précisé way, full optimization of the set of procedures intended for automated séparation of cassava from its stumps or branches, on the front part of the branches, directly on the harvesting field, based on a peeling machine with strong résistance, safety and versatility, easily adaptable to a wide range of tubers, lands, places and users in general;

BR102013020952 - August 6, 2013 - Fully mechanical harvesting machine for cassava, defined by the conveyor belt, a hydraulic motor, a drive shaft, a girth gear, a structural base, a gearing and the peeler;

BR102012028476 - November 7, 2012 - continuous harvesting machine for cassava roots with a cutting/separation from the stump, wherein the device is pulled by engagement to the dragging tractor or hydraulic

2/25 system on the third point, activation and transference of mechanical torque by means of the power take-off (tractor) of ail classes - by subséquent cardan in the harvesting machine, together with coupling hydraulic hoses for the transfer of hydraulic power, wherein the harvesting machine has back wheels for activation by hydraulic cylinders for lifting the châssis for its transportation; wherein the harvest of cassava roots is performed by continued motor traction from the engine, with full retraction of the rear wheels as already lowered by the activation of the harvesting system by hydraulic cylinders of the harvesting machine on its front part for pénétration and advancement within the soil by underneath the plant on the line, guiding them by means of blades, pénétration nozzles, shafts and side shields to lift the total sliced volume (plant with roots, earth and dirt), passing through lines of cassava, which may be between two or more lines;

BR102012027162 - October 23, 2012 - Peeling machine for cassava in general, with a unique and spécifie automated mechanical structure, frontally towed by a pulling vehicle and based on a lower-medium knife activated by sensors and a pneumatic piston, aiming to facilitate, in an extremely practical, safe and précisé way, full optimization of the set of procedures intended for the automated séparation of cassava, on the back part of the branches, from their stumps or branches, on the front part of the branches, directly on the field and based on a peeling machine with strong résistance, safety and versatility, easily adaptable to a wide range of tubers, lands, places and users in general;

BR202012009552 - April 23, 2012 - harvesting machine for cassava, fully based on its simple and strong structure with as few constituents as possible and extremely simplified and safe operation, added to practical manufacturing procedures, so to generate an efficient harvesting machine, able to fully mechanize tuber harvesting

3/25 directly on the field, i. e. the harvesting machine, while passing over the planted soil, sequentially cuts the stalk of the tubers, with four dises assembled lengthwise, thus facilitating a route for the machine to enter the soil, wherein scarifiers take the roots to the belts, guide said roots to an elevator which takes them to a belt carrying the déposât to be stored until the cargo is full; after that operation, the gâte is opened and the roots are thrown to a lorry by means of a belt;

BRPI1004368 - November 25, 2010 - harvesting machine for cassava, with a châssis characterized by the machine structure being fixed to the wheels pulling two pairs of chains to guide the stalks to four pairs of saws, by two waiting tanks, a pair of belts, a storage tank, a grinder, a winch and an operation platform;

BRMU8501654 - August 15, 2005 - arrangement introduced in a harvesting, cleaning and swathing equipment for cassava and similar, which may be coupled to the third point of the tractor and, by means of its TDP, transmits motor force by pulleys, belts, gearings and chains, able to pulp the root of cassava by a V-shaped machete on two planting lines, also having a rising grid facilitating the guidance of the harvested product to a rear rotating belt, with side bumpers, formed by rules and U-shaped fingers which, on their side, pull the product without damaging it, in an equally rising direction, cleaning it from excessive earth which, at the end of said belt, is thrown by gravity to a pair of swathers organizing it over the soil, ready for collection and transportation;

BRPI0501858 - March 10, 2005 - constructive arrangement as applied to a harvesting machine for cassava and similar; which object is harvesting the product, wherein cassava or similar is taken from the soil, being then guided to the discharge system as pre-defined by the screening belt, conveyor belt and the manual séparation belt, so to

4/25 guide the harvested product to its destination, with no damage to the root or tubers whatsoever;

BRPI0100915 - January 17, 2001 - harvesting set for cassava, with continuous working and bagging equipment, comprising a cutting blade, a support shaft for the pulper, integrated with the pulper grid, separator crusher rotor, orbital hydraulic engine A, elevator, orbital hydraulic engine B, an angle bracket for the elevator, forks, an adjustable grid for any measurement for the elevator, a belt, orbital hydraulic engine C activating the dirt line belt, side dirt line conveyor belt, clean line conveyor belt, central gutter, orbital hydraulic engine D activating the clean line belt, container with big bags, rack, platform for peeling workers, hydraulic rising arm for the tractor, head of the harvesting machine, réservoir for hydraulic oil, engaging pin for the head, (24) nut for fixing the rocker arm, (25) rotating axis, main châssis, tandem fixture, fixture for the tandem pin, piston pin, piston fixture, service platform for cargo operators, gearing to activate the roller, chain, gearing to activate the rotor, chain coupler, gearing to activate the roller/orbital hydraulic motor, fingers for the crushing rotor, elevator chain, axis for elevator traction, rolling bearing, support for fixing the belt, crossbars for fixing the grid, gearing for activating the elevator, axis for the conveyor belt, gutter and guide for the clean cassava route, protection plate, clean belt grid, crossbar for the clean line conveyor belt, chain for the conveyor belt, grid, crossbar for the dirty line conveyor belt, flange and roller set, axis for activating the dirty line belt, protection plate and side road guide for dirty cassava, support table for crushing workers to crush cassava, crusher pulling finger, support for hydraulic engine, hydraulic piston with independent activation, rocker arm, axis, wheel hub, tyre, rocker arm axis, gearings, chain for hydraulic engine,

5/25 tandem, belt support, dirty line belt grid, (69) winch cart, (70) belt cover;

BRPI0004841 - September 14, 2000 - harvesting machine with belt start/fixing chain for one, two or more lines of cassava or other roots and tubers, comprising a châssis, pulper nozzle, support base for the plucking body, safety device against foreign bodies, device for regulating the slope of the pulper nozzle, plucking bodies, device for regulating plucking bodies wherein the device works with ail kinds of soil and also in very dry, compact or loamy (soft) soils, which principle of operation is excavating and pulling, engaged to the third point of the tractor, the machine passes with a pulper nozzle below the root of the plant and subsequently grasps the shafts between two rotating chains or belts, forming the plucking bodies; the machine has a harvesting châssis, carrying the pulper nozzle with the blade, the column with two spines to hold the plucking bodies and may also hâve a set of two parallel machines, serving for four or more planting lines, and the distance between two plucking bodies is regulated according to the spacing between the planting lines; plucking bodies are flexible, automatically adapting themselves to the irregularities of cultivation and the planting lines, the belts vertically guide the plant according to the adjustable slope, defined as a device for the régulation of plucking bodies, imitating the human movement of extracting the root; at the end of the plucking bodies, the plant may be thrown over the soil or conveyed to other means of transportation, storage or eventually classification; the belts of the plucking bodies are activated by hydraulic engines, by taking power or by other traction means allowing for synchronized work and adjustable rotation, adapted to the real speed of the tractor, wherein the root is taken in an exactly vertical position; at the end of the plucking bodies, the root will be thrown over the same point of its

6/25 plucking, and the pulper nozzle has a safety device against foreign bodies; the slope of the pulper nozzle is also adjustable by a hydraulic piston defined as a device for adjusting the slope of the pulper nozzle; in the third point of the tractor, the design of the pulper nozzle may hâve teeth; the blade being straight, flipper-shaped or vertically or horizontally curved, as required for the harvesting area; the great advantage of the new principle is simpler activity, thus the speed of work may be faster than for hand harvesting; furthermore, the structure and weight of the machine may be defined from the weight of the plant and not as a function of screening the earth with rests of branches and previous crops not yet decomposed;

BRPI0000729 - January 3, 2000 - mechanical device for extraction of cassava and other tubers, constituted by an especially designed and developed machine for removing cassava and other tubers, having a quantity of constituents, among which we can highlight a double métal châssis, an oscillating device, machetes for removal and eut, hydraulic engine, knurled cutting dise, wheels, safety device and vibrating shafts, wherein the oscillating device is formed by rollers, bearers, triplets, a connecting rod, rotation regulator, height regulators and others as required for the correct operation of the device, wherein ail constituents reaching the soil, wheels, machetes, shafts and selfsharpening dise hâve height régulation devices, facilitating their use on any type of soil, also removing other crops such as potatoes, turnips, carrots and other tubers, highlighting that, to remove those tubers, it is only necessary to substitute vibrating shafts, which measurements are defined as for their spacing and length as a function of the type of crop;

BRMU7901830 - August 26, 1999 - Device for plucking cassava and other plants, comprising a métal structure provided with wheels for displacement and transport, having

7/25 a set of forks located near the wheels, provided with gripping movement and activated by a lever included on the upper portion of the car, the operation of the device being based on the principle of a lever arm by defining the point of support close to where the force is applied, having the métal structure as a lever;

BRMU7800059 - February 26, 1998 - collecter for cassava and system for use with hand support to collect and crush the roots, comprising an uplifting belt in latéral position, used by trucks, front belt, side belt, rear belt, a fiat front rubber belt for the front belt, a stainless Steel beehive belt for the side belt, a fiat rubber beehive with Steel taliscas for the rear belt, tethers for supporting the third belt, a steel structure 1020, side flaps made of steel plates, a tractor pulling a cart, a direction point for working, a second direction position for workers to move material over the second belt, a direction position for the third staff team over the side screening belt and screen, initial collecting team from the floor to the belt, screened cassava roots, éléments of the hydraulic control system for belts, a support axis for lifting the third and last lifting belt for the hydraulic control of the collecting machine, a power take-off point for the tractor (approximately 300 rpm rotations per minute), a location point for the cardan, a pump for hydraulic control, an oil tank, a cleaning filter for return oil, engine, connection hoses, quick engagements, joining points, T, flow control valve, relief valve, side belt engine, flow control lever (faster or slower rotation), rear lifting belt engine, rear lifting belt with more taliscas, with a nozzle from the lifting belt, screen and deflector (35);

BRPI9104013 - September 13, 1991 - cassava plucking machine, comprising a support châssis with engagement for coupling in an agricultural tractor, a lower blade which is slightly sharp, sloped and fixed to the support châssis, a

8/25 conveyor belt to take cassava out from the soil, fixed next to the lower blade and the support châssis, assembled over axes with bearings, activated by the power taken off from the tractor, activating an axis which, by means of belts and pulleys, activâtes a speed reducer which, by means of gearings and a chain, activâtes the belt, also having two wheels with tyres for support and for adjusting the desired depth of the soil; the implement being coupled to a tractor which, by the power take-off, activâtes an axis which, by means of chains and pulleys, activâtes a speed reducer which, at the same time, activâtes, by means of chains and gearing, the belt transporting cassava to the soil surface, the tractor drags the implement which, by its sloped and sharp blade, gets deeper into the soil until the height defined by the tyres, the blade and the belt follow through below cassava plants, loosening them from the ground until reaching the surface; and

BRPI9103563 - August 16, 1991 - manual harvesting machine for cassava, based on the lever principle, i. e. at the edge of the lever, there will be a welded support (2) made of a circular tube, which shape will be similar to a parable, and, over that same support, shoes (1) are welded at the edges, which purpose is to avoid the support (2) from going deep into the soil; the fork is fitted to the lever, which purpose is to fix cassava stalks and define the levering point; and, finally, there is a bearing to avoid the fork from running freely over the lever from one edge to the other, besides avoiding the fork from getting lost.

[3] As we can see from above, there is currently a considérable variety of harvesting machines for different tubers, especially cassava. Generally speaking, these machines add resources to meet small, medium-sized and large producers, but, in the case of small and medium-sized producers, it is important that the machine meets different requirements, especially concerning versatility of the

9/25 equipment at the time of coupling itself to a tractor, which should really be considered for the set to work advantageously on simple tractors, which does not occur with conventional equipment. On the other hand, another important factor for small and medium-sized producers is the cost of the set and the functional aspects, i. e. the equipment should be efficient to be put into operation by one single operator.

[4] We hâve also noticed that conventional devices hâve not been projected to define compact implements with means for the tractor's driver to precisely view the row of plants to be harvested.

[5] Conventional equipment also does not explore an ergonomie arrangement of the different sets forming the machine. They are usually arranged in a linear sequence, and consequently define long and heavy implements with difficult operation.

Objects of the Invention

[6] To define a simple agricultural machine, able to pluck cassava with précision, one row of plants at each time.

[7] To define an ergonomie arrangement and L layout, i. e. a crosswise structure or châssis, to be positioned crosswise on the tractor rear, wherein the set is coupled to the three-point engagement system of a conventional tractor.

[8] The structure or châssis provides one of its edges with means for réception of a higher rear upper edge of the plucking cart for cassava. Said ramp-shaped cart is located next to the side of the tractor, its front edge is close to the ground and, on that point, it has support wheels to slide over the soil and cope with its irregularities. Said edge or the front of the cart is displaced against the line of plants to be plucked from the soil and, at the same time, a belt system grips the crushed leaves of cassava and pull them up, displacing them behind and above until over the respective edge of the crosswise châssis. In that point or on the upper

10/25 part of the châssis, there is a crosswise belt receiving ail the plunked plants. That belt also works as a screen and meets two purposes, the first of which is pre-cleaning, since it allows earth, sand and other remaining residues on the plant to fall by gravity. The other object is to serve as a true table to separate crushed leaves and cassava. On the crosswise châssis, there are other sets, besides the belt, i. e. firstly the belt ends in a cube-shaped compartment, wherein a bag is located (which is also cube-shaped) , which is kept open and in a position to receive the roots separately from the plants already without crushed leaves. Next to the conveyor belt, there is also a working place for staff members, allowing them to handle the plants while they are also being displaced over the conveyor belt and, before they fall inside the bag, roots and crushed leaves are manually separated (peeled), being the latter thrown to the soil, while the first ones are taken to the bag which, on the other hand, is housed in that cube-shaped compartment and is also supported over a moving bottom which is hydraulically activated by a piston, thus allowing said bottom to slide until fully leaving from under the bag which, on the other hand, when full, is simply thrown over the soil for later collection, and thus the harvesting process is continuous.

[9] Ail the sets of the machine, i. e. plucking cart, belt, bag releasing bottom, hydraulic cylinders and other moving parts are hydraulically activated by the pump of the tractor.

[10] Therefore, we hâve noticed that the L arrangement, the side position of the plucking cart and the rear crosswise position of the belt and the working point grant means for the whole set to be adjusted in one of the sides and the rear part of the tractor, thus constituting an ergonomie, compact and easily operative equipment.

[11] The compact shape of the set facilitâtes its coupling to the tractor and the movement of the set on the

11/25 farm, also when not in operation.

[12] Finally, the compact shape of the set has enabled a considérable réduction of its weight, and consequently a considérable réduction of the final cost of the set has also been possible, making it become idéal for small and mediumsized producers.

Description of Drawings

[13] For better understanding of the présent invention, its detailed description follows, with reference to the attached drawings:

FIGURE 1 is a perspective view showing the harvesting machine for cassava in a front upper angle, highlighting the front, left and upper side;

FIGURE 2 is another perspective view, but showing the harvesting machine in an upper angle, highlighting the rear, upper and right side;

FIGURE 3 shows an upper view of the harvesting machine coupled to a conventional tractor;

FIGURE 4 shows a perspective view of the harvesting machine in a front angle and an enlarged perspective detail, also in a front angle, showing the structure of the harvesting machine;

FIGURE 5 is a perspective view of the harvesting machine in a front angle and an enlarged perspective detail in a lower front angle, showing the structure of the harvesting machine;

FIGURE 6 is a perspective view of the harvesting machine in a rear upper angle and an enlarged perspective detail, also in a rear upper angle, showing the structure of the harvesting machine;

FIGURE 7 is a perspective view of the harvesting machine and two perspective details of the hinged support head of the cart for plucking cassava;

FIGURE 8 shows a perspective view of the harvesting machine, an enlarged perspective view only of the plucking

12/25 cart and its crosswise eut;

FIGURE 9 shows a partial perspective view of the harvesting machine, and a perspective lower angle, only of the cart for plucking cassava;

FIGURE 10 shows an enlarged view of the A-A eut as shown by Figure 8;

FIGURE 11 shows a perspective view of the plucking cart and two enlarged details, also in perspective view, highlighting the construction of the conveyor belt gripping and plucking the plant from the soil;

FIGURE 12 is a perspective view of the plucking cart and two enlarged details, also in perspective view, highlighting the first guiding set of the plucking belt;

FIGURE 13 shows a perspective view of the plucking cart and an enlarged detail, also in perspective view, highlighting the second guiding set for the plucking belt;

FIGURE 14 shows a perspective view of the plucking cart and an enlarged detail, also in perspective view, and also highlighting the second guiding set for the plucking belt, but in a different angle;

FIGURE 15 shows a perspective view of the plucking cart and an enlarged detail, also in perspective view, and also highlighting the third guiding set for the plucking belt;

FIGURE 16 shows a perspective view of the plucking cart and an enlarged detail, also in perspective view, and also highlighting the third guiding set for the plucking belt, but in a different angle;

FIGURE 17 shows a perspective view of the plucking cart and an enlarged detail, in an upper view, of the third guiding set of the plucking belt;

FIGURE 18 shows a partial perspective view of the harvesting machine and an enlarged perspective view of the conveyor belt for harvested cassava;

FIGURE 19 shows a partial perspective view of the

13/25 harvesting machine and an enlarged perspective view, in lower angle, of the conveyor belt for harvested cassava;

FIGURE 20 shows an exploded perspective view, in an upper angle, only of the conveyor belt and an enlarged detail;

FIGURE 21 shows an exploded perspective view, in a different angle, only the conveyor belt and an enlarged detail;

FIGURE 22 shows a side view and a crosswise eut of the conveyor belt for harvested cassava;

FIGURE 23 shows an upper view and an enlarged view, only of the conveyor belt;

FIGURE 24 also shows an upper view and a different enlarged detail, only of the conveyor belt;

FIGURE 25 is a perspective view of the harvesting machine and two enlarged details in upper angles, showing the compartment of the bag for holding harvested cassava;

FIGURE 26 also shows a perspective view of the harvesting machine and two enlarged details in rear angles, showing the compartment of the bag for packing harvested cassava;

FIGURE 27 shows a perspective view in lower angle highlighting the sliding ramp serving as a support for the bag while receiving cassava;

FIGURE 28 shows another perspective view in a lower angle of the structure, but partially exploded, highlighting the sliding ramp serving as a support for the bag while receiving cassava;

FIGURE 29 shows another perspective view in a lower angle of the structure, but partially exploded in a different angle, also highlighting the sliding ramp serving as a support for the bag, while receiving cassava;

FIGURE 30 shows a partial perspective view of the harvesting machine and enlarged details showing its double wheels;

14/25

FIGURE 31 shows a partial perspective view of the lower edge of the plucking cart and an enlarged detail showing its simple wheel and its height régulation device;

FIGURE 32 shows a perspective view of the harvesting machine and an enlarged detail, highlighting the hydraulic cylinder rising and lowering in angle the cart for plucking cassava;

FIGURE 33 shows a side view of the harvesting machine and its enlarged detail, highlighting the same hydraulic cylinder raising and lowering in angle the cart for plucking cassava; and

FIGURE 34 shows an upper view of the harvesting machine coupled to a conventional tractor, wherein the path of the plant during harvesting is schematically exemplified.

Detailed Description of the Invention

[14] According to these illustrations and their details, more particularly Figures 1, 2 and 3, the présent Invention, HARVESTING MACHINE FOR CASSAVA, is characterized by comprising:

crosswise châssis (1), which length is defined for at least one of its edges not exceeding the width of a conventional tractor (T);

the châssis (1) has its lower average side with coupling means (2) to the three-point engaging system of a conventional tractor (T);

the châssis (1) has an integrated working point (3) extending through both sides, front and rear, for accommodation for workers handling harvested plants, separating cassava from crushed leaves;

the edge of the châssis (1) exceeding the width of a conventional tractor (T) , sufficiently extends itself to receive an upper structural complément in the form of a head (4) ;

below the head (4) and fixed to the lower corner, the châssis (1) has double wheels (RI);

15/25 the head (4) has means for hinging the rear upper edge of a sloped plucking cart for cassava (5), extending itself next to the respective side of a conventional tractor (T);

the lower edge of the plucking cart for cassava (5) is provided with a simple side wheel (R2) and the respective height adjusting device (D);

- a conveyor belt (6) , also crosswise, extends itself over the crosswise châssis (1) and between the working point (3), also having one of its edges located under the edge of the plucking cart (3) to receive the plucking plants;

at the opposed edge exceeding the width of a conventional tractor, there is a cube-shaped compartment (7) which, besides being located under the end of the conveyor belt (6), also lodging a usual bag (B), which upper part or mouth remains located under the respective edge of said conveyor belt (4) to receive cassava as harvested and separated from crushed leaves; and the base of the cube-shaped compartment (7) is defined by a sliding ramp (8) for supporting the bag to be loaded and unloaded from the full bag (B).

[15] The crosswise châssis (1) is shown in detail by Figures 4, 5 and 6, wherein we verify that it is formed by a base structure defined by a frame with three stringers of lengthwise tubes, one of which is frontal (9), one medium (10) and one rear (11), ail of which are interconnected in the same horizontal plane by other end (12), intermediate (13) and sloped (14) tubular parts, concluding an assembly base for other constituents, and thus, over that front stringer, various vertical tubes (15), (16), (17) and one sloped tube (18) are fixed, and, before the latter, there is a profile (19), which upper edge is coupled to a horizontal tube (20) equally fixing the upper edges of the other tubes (16), (17) and (18), forming a vertical frame for fixing the

16/25 coupling means (2), and the upper edges of the tubular parts (15) and (16) also receive folded plate parts configuring supporting cradles (21) and (22) for the head (4), forming, between said cradles, a gap with lower closing of plates (23) and, above that, a plate ramp (24) , above which a fitting gap for the respective edge of the plucking cart (5) is formed and, additionally, those two vertical tubes (15) and (16) are interconnected to the other two rear tubes forming other supporting frames (25) and (26) for the edges of parts of crosswise plates (27) and (28) ending at the side of the cube-shaped compartment (7), and also said lengthwise plates are located forming a free vertical gap (29), over which the conveyor belt (6) extends itself, and thus said gap constitutes an outlet by gravity for residues such as earth, sand and similar.

[16] The working points (3) are defined by two ranges with high and rugged floor (30) and (31) with opposed stepped inlets (32) and (33), and the upper floor (30) has, as its bodyguard, the parts of the châssis (1) themselves, while the other upper floor (31) includes a tubular bodyguard (34).

[17] The head (4) is shown in detail by Figure 7, wherein we can verify that it comprises shoes of triangular plates (35) with the internai corners surrounded by other supporting plates (36), and also, over said triangular plates (35), an inverted U-shaped crossbar (37) is fixed, which lower edges are welded at the internai corners of the triangular plates (35), while the other corners are equally welded to lower edges of inclined tubes (38) as a tripod, which upper edges are welded below the upper corners of the inverted U-shaped crossbar (37) which, on the same upper corners, also has two axis edges aligned to each other (39) , being exposed from within and forming hinged support points for the rear upper edge of the plucking cart (5).

[18] The plucking cart (5) is shown in detail by Figures 8, 9 and 10, wherein we can verify that it comprises a

17/25 structure with an ordinarily triangular crosswise section, initially formed by three parallel and lengthwise stringers, two of which being lower tubular stringers (40) and one upper inverted U-profiled stringer (41), wherein this and the two first stringers are interlinked by inverted U-shaped supports (42) under equal distances, wherein the first frontal is sufficiently distant to leave both edges of the lower stringers (40) free, one of which receiving the simple wheel (R2), and the same happening at the upper edges, but, at that point, ail of them are structurally interlinked by a practically parallelepiped box (43), wherein the edges of the lower stringers (40) penetrate until a médian point and are rigidly welded to the walls of said box (43), which also has two small tubes (44) fixed to their front upper edges, aligned to each other and turned outside, wherein they form a hinged fitting for pénétration for the edges of axes (39) of the head ( 4 ) .

[19] The box (43) has an upper closing (45) and, below it, there is another similar plate closing (46), forming another box (47) which, jointly with the bottom (48), form supporting points for a set of activation formed by a hydraulic engine (49) fixed over the first upper closing (45) which, on the other hand, is pierced by the axis of said hydraulic engine which, inside the second box (47), receives a gearing (50) and the respective transmission chain (51) coupled to another gearing (52) joint to an upper end of an axis (53) which, on the other hand, has another gearing (54) below the first gearing (52) which is synchronized with another gearing (55) of a second axis (56), with the latter and the first one having their lower edges bearing against the respective internai walls of the box (43) and, also, these lower edges are equally provided with gearings (57) , aligned to each other and equally receiving plucking belts (58), seen in detail on Figure 11, both equally formed by a chain (59) which, on the inside, is coupled to a respective

18/25 gearing (57) and, on the outside, is coupled to a belt per se made of wavy rubber (60), being said coupling identically repeated at the front edge of the cart, wherein there is another pair of gearings (61), similar to the first ones (57), but their axes turn freely in bearings (62a) and their respective stretching supports (62b) fixed under the edges of the lower stringers (40), and thus both belts of wavy rubber (60) work on the same plane, side by side, so that their parts abutting each other may be simultaneously displaced above and form efficient jaws when the cart is displaced against the crushed leaves (the arborous part of cassava), i. e. the front part of the cart, the two scrolls of the wavy rubber belts (60) grab the crushed leaves by firmly gripping them and, at the same time, they are displaced behind and above, making the roots (cassava) be plucked and transported to the belt (5) for séparation of cassava and crushed leaves.

[20] As already indicated, the plucking belts (58) work in synchronization to grab crushed leaves and simultaneously displace them above and behind, plucking them from the soil, but, for that movement to be performed with précision, the parts of both belts are kept under tension and guided from the lower edge of the plucking cart (5) to its end over the conveyor belt (3) and, for that purpose, along the plucking belts (58), three kinds of devices are provided, wherein the first two are guiding devices (63a) and (63b), while the third one is a pressing guide device (63c), wherein the first two are distributed along the paths turned outside each plucking belt (58), while the third pressing guide device (63) is located along the opposed parts of the plucking belts (58), keeping them swinging and pressed to each other, so that said parts may self-adjust with a given pressure to the volume of crushed leaves which are grabbed between them.

[21] Figure 12 shows in detail the first guiding device (63a), which is repeated in an adéquate quantity, each one constituted by a support (64) which, at one edge, is fixed to

19/25 the respective stringer (40) and remains perpendicularly turned to outside, wherein its free edge has a lengthwise tear (65) for adjustably fixing the upper edges of the axes of a pair of freely rotating pulleys (66), between which the respective part of the belt (58) is guided.

[22] Figures 13 and 14 show in detail the guiding device (63b), which is also repeated in an appropriate quantity, each one constituted by an L-shaped support (67), which upper edge is folded crosswise behind and forms a fixing flap (68) over the respective stringer (40), while the lower flap (69) reçoives a sliding corner complément (70), over which the respective part of the plucking belt passes (58), which is confined jointly with a support (71) and the respective roller (72), the latter also having its axis adjustably fixed to a tear (73) of said support (71) fixed crosswise against the first one (68).

[23] Figures 15, 16 and 17 show in detail the third pressing guide device (63c), which is similarly repeated in an appropriate quantity, each one constituted by two vertical pulleys, being one support counter pulley (74) and a floating pressing pulley (75), between which the opposed parts of the plucking pulley (58) pass, wherein the first support pulley (74) has its axis (76) fixed to a support (77) which is itself rigidly fixed under the respective stringer (40), while the other pressing pulley (75) has its axis (78) fixed to the edge of a rocker arm (79) which, by means of medium hinging (80), is fixed under the other stringer (40) and the other edge of said rocker arm (79) is hinged to an edge of a horizontal shaft (81) which, on the other hand, freely pierces a support (82) fixed to the same stringer (40) and, after that support, said shaft is involved by a helical spring (83), having an edge supported on said support (81), while, on the opposed side, it is supported on the respective edge of the shaft (81), keeping the latter one pulled, consequently providing swing to the pressing pulley (75) ,

20/25 allowing it to be moved according to the volume of crushed leaves passing between the plucking belts (58) . Obviously, said swing offers means for automatic adjustment of the distance between overlapping parts of the plucking belts (58) , keeping said parts pressed to each other for grabbing crushed leaves in displacement.

[24] The conveyor belt (6) is shown in detail by Figures 18 to 24, wherein we can verify that it comprises a rectangular box-shaped structure (84), defined by parallel sidewalls of plates (85), joined to each other by a head (86) and a respective front cap for inspection (87), while, from the opposite side, it is fully open (88), and the lower edges of said side walls (85) are structurally interlinked by reinforcement inverted U-shaped crossbars (89), while its upper edges receive compléments in the form of flaps projecting upwards and sloped towards outside, wherein one flap (90) occupies the whole extension of the respective wall (85) and a shorter flap (91) resulting in a gap (92) for fitting the upper edge of the plucking cart (5), and also, said flaps (90) and (91) are externally reinforced by triangular plate squares (93), forming a résistant box (84), inside which a belt per se (94) is assembled and, for that, the edges of the side walls (85) receive bearings (95), one of which integrated to a hydraulic engine (96), wherein these bearings receive the end axes (97) and (98) of said belt, which axis (97) is coupled to the hydraulic engine (96) and both axes are also provided with gearings (99) next to their edges, a pair at each axis, to which chains (100) are coupled, one at each side, interlinked by a plurality of plate bands (101) crossed by openings (102) and having at least one edge folded crosswise towards outside in the form of a flap (103), forming a transport surface for cassava separated from crushed leaves and, at the same time, configuring a true pre-cleaning screen, wherein the openings (102) let earth, sand and other remaining residues on the

21/25 plant pass through and fall by gravity.

[25] Within the belt (94), a frame defined by crossbeams (104a) and lengthwise sliding guides (104b), one at each side, is assembled, fixed to the internai side of the walls (85) of the box (84), constituting sliding support for the side edges of the upper part of the belt (94).

[2 6] The compartment (7) is shown in detail by Figures 25 and 26, wherein we verify that it is comprised by three side walls (105a), structured by vertical tubes (105b), one at each corner, and corners (106) at the upper edges, ail of them interlinked to the structure of the châssis (1) , and also, the upper and rear sides are fully open, wherein the upper opening is aligned under the conveyor belt (3) , while the other rear open side forms a gap for inserting and taking off the bag (B) .

[27] On two opposed upper edges of the compartment (7), gripping devices (107) are provided for the handles of the bag (B), each device is formed by a tubular axis (108), which edges are rotatingly supported over bearings (109), after one of which the rear edge of said tubular axis (108) is folded crosswise, forming a manually rotating lever (110).

[28] Between both bearings, said tubular axis (108) has two radial pins (111), to which the handles of the bag (B) are coupled, keeping it stable for harvesting.

[29] The tubular axis (108) has a locking set defined by parallel collars (112) with holes (113) and a latch (114), wherein the first ones (112) are integrated to the respective bearing (109), while the other one (114) is close to the manually rotating lever (110) and fixed to the tubular axis (108), so that, by turning the latter clockwise or anticlockwise, it is possible to align the latch (114) to the holes (113), and, consequently, it is possible to lock or release the handles of the bag (B) , and said axis is also liable for being locked by the latch (114) in two positions, in one of which the handles are coupled to the pins (111)

22/25 (turned downside) and, in the other one, the same pins are turned upside, for removing or putting the handles of the bag (B) .

[30] The sliding ramp (8) is shown by Figures 27 to 29, wherein we verify that it is formed by a quadrangular plate (115) which, besides having dimensions to be the bottom to close the compartment (7), is also structured by its lower part with profile crossbeams (116) and tubular outline (117), the latter granting means for said quadrangular plate (115) to be slidingly fitted to corners forming guiding rails (118), provided at one of the edges and one on each side under the structure of the châssis (1), wherein the respective edge of the quadrangular plate (115) has also a support (119), wherein it is hinged to the edge of a hydraulic cylinder (120), which opposed end, similarly and with another support (121), is hinged to the respective part of the châssis (1). The activation of said hydraulic cylinder (120) allows the quadrangular plate (115) to be positioned inside the compartment (7), closing its bottom and, at this point, the bag (B) remains supported while receiving cassava already separated from crushed leaves and, when said bag is full, the hydraulic cylinder is activated and the quadrangular plate (115) retracts itself, making the full bag to be simply thrown over the soil.

[31] As already stated, below the head 4 and fixed to the lower corner of the châssis (1), double wheels (RI) are fixed, shown in detail by Figure 30, wherein we verify that it is formed by a plate fork (122), which rear edge has a crosswise plate (123) fixed to the closing plates (23) of the châssis (1), while, from the opposite or front edge, said fork (122) has bearings (124) to support the axis (125) ending with other bearings (126) integrating the wheels (127) .

[32] Figure 31 shows the simple wheel (R2) and the respective height régulation device (D) , wherein we verify

23/25 that said set is formed by a complementary lying L tube structure (128), having an end fixed over and close to the front edge of the respective stringer (40), while, at its other end, a vertical wrist (129) is fixed, holding and fixing an equally vertical telescopic set defined by two parts, one fixed external part (130) and an internai moving part (131), the latter having its lower edge fixed crosswise to the axis (132) of the wheel (133), while, at its upper edge, an internally screwed glove (134) receiving a spindle (135) is fixed, which, on the other hand, has its upper edge rotatingly coupled to the respective edge of the external fixed part (13), wherein it receives a crank-like complément (136) allowing to turn said spindle (135) in both senses and consequently the glove (134) and the internai moving part (131) may be displaced upwards or downwards until the desired height, and consequently the front edge of the plucking cart (5) is adjusted at the correct height to capture and pluck the plants.

[33] As already stated, the plucking cart (5), as shown by Figures 32 and 33, has it upper edge hinged to the head (4) , and consequently its front edge with the wheel (R2) swings upwards and downwards to follow soil irregularities. Under this condition, the machine works appropriately. In other situations, the edge with the wheel (R2) must be raised to an appropriate height when the set is not working, and for that purpose, a hydraulic cylinder (137) is provided, having the rear edge hinged at a support (138) which, on the other hand, is fixed to the respective part of the head (4), while its other edge has an oblong ring (139), wherein a pin (140) floats and, on the other hand, is fixed at those supports (42) of the frame of the plucking cart (5) . Therefore, the oblong ring (139) allows the plucking cart (5) to swing upwards and downwards with no interférence from the hydraulic cylinder (137), which activation, when desired, allows to raise the plucking cart (5) and, on that position, the

24/25 machine is moved when not in use.

[34] By observing Figure 34, we can notice that the harvesting machine at issue has a compact layout, wherein the châssis (1) is crosswise to the rear side of the tractor and the plucking cart (5) extends itself next to the side of said tractor (T). In that position, the front edge of the plucking cart (5) is able to swing by coping with soil irrégularités, since that edge has the wheel (R2) as previously adjusted in height by its device (D) . Therefore, the tractor is simply displaced against the plant row (P). Plucking belts (58) move synchronously and thus, when the plant reaches the front edge of the cart (5) , the parts of crushed leaves are forced towards the center or between the two plucking belts (58), which wavy shape works as true jaws, by pulling the plant above and simultaneously behind, lifting and losing them over the starting edge of the conveyor belt (9), extending rtself between the working points (3), where staff members separate crushed leaves from cassava, wherein the first ones are thrown to the soil, while cassava remains over the belt and is dispensed into the bag (B) . The latter, when full, is dispensed. over the soil and substituted with another empty bag, and thus harvesting is continuously performed.

[35] Therefore, ail the objects of the invention are reached, since it defines a machine with simple operation and able to precisely pluck cassava, one line of plants each time. It has an ergonomie arrangement and L layout, character i z ing a very compact version. Ail the sets in the machine, i. e. plucking cart, belt, bag releasing bottom, hydraulic cylinders and other moving parts are hydraulically activated by the tractor pump.

[3 6] The compact form of the set speeds up its coupling to the tractor, and also facilitâtes the movement of the set on the farm and also when not in operation.

[37] Finally, the compact form of the set provided for considérable réduction of its weight, and consequently a

25/25 sharp réduction in the final cost of the set has also been possible, making it idéal for small and medium^-sized producers.

Claims (15)

1) CASSAVA HARVESTING MACHINE, characterized by comprising:

- a crosswise châssis (1), which length is defined so that at least one of its edges exceeds the width of a conventional tractor (T);

- the châssis (1) has its front medium side provided with coupling means (2) to the three-point engaging system of a conventional tractor (T);

- the châssis (1) has an integrated working point (3) extending itself in its both sides, front and rear;

- the edge of the châssis (1) exceeding the width of a conventional tractor (T) sufficiently extends itself to receive an upper structural complément in the form of a head (4);

- below the head (4) and fixed to the lower corner, the châssis (1) has double wheels (Rl);

- the head (4) has means for hinging the upper rear edge of a sloped plucking cart for cassava (5) , extending itself next to the respective side of a conventional tractor (T);

- the lower edge of the plucking cart for cassava (5) is provided with a simple side wheel (R2) and a respective height régulation device (D) ;

- a conveyor belt (6), also crosswise, extends itself over the crosswise châssis (1) and between the working point (3), also having one of its edges located under the end of the plucking cart (3) ;

- on the opposed edge exceeding the width of a conventional tractor, there is a cube-shaped compartment (7) which, besides being positioned under the end of the conveyor belt (6), also houses a usual bag (B), which upper part or nozzle is positioned under the respective edge of said conveyor belt (4); and

- the cube-shaped compartment base (7) is defined by a sliding ramp (8) configuring a support bottom for the bag

2/8 (B) .

2) CASSAVA HARVESTING MACHINE of claim 1, characterized by the crosswise châssis (1) comprising a base structure defined by a frame with three stringers with lengthwise tubes, one frontal (9), one medium (10) and one rear stringer (11), ail of them interlinked in the same horizontal plane by other end (12) , intermediate (13) and sloped (14) tubular parts; over the front stringer, various vertical tubes (15), (16), (17) and a sloped tube (18) are fixed and, before the latter, there is a profile (19) , which upper edge is coupled to a horizontal tube (20) equally fixing upper edges for the other tubes (16), (17) and (18), forming a vertical frame for fixing coupling means (2), and the upper edges of the tubular parts (15) and (16) receive folded plate parts configuring support cradles (21) and (22) of the head (4) , forming, between said cradles, a gap with lower closing of plates (23) and, above them, a plate ramp (24) , above which a gap is formed, constituting fitting to the respective edge of the plucking cart (5) and those two vertical tubes (15) and (16) are also interconnected to the other two rear tubes forming other support frames (25) and (26) to the edges of lengthwise plate parts (27) and (28) , ending at the side of the cubeshaped compartment (7), and those lengthwise plates are also located so to form a free vertical gap (29) , over which the conveyor belt (6) extends itself; said gap configuring an outlet for residues by gravity.

3) CASSAVA HARVESTING MACHINE of claim 1, characterized by the working points (3) being defined by two ranges of high and rugged floor (30) and (31) with opposed stepped inlets (32) and (33), and the upper floor (30) also having, as a bodyguard, the parts of the châssis (1) themselves, while the other upper floor (31) includes a tubular bodyguard (34).

4) CASSAVA HARVESTING MACHINE of claim 1, characterized by the head (4) comprising shoes of triangular plates (35) with the internai corners shielded by other support plates (36)

3/8 and, over said triangular plates (35), an inverted U-shaped beam (37) is fixed, which lower edges are welded to the internai corners of the triangular plates (35), while, on the other corners, lower edges of sloped tubes (38) are fixed in a tripod shape, which upper edges are welded below the upper corners of the inverted U-shaped beam (37), which, on the same upper corners, also has two axis edges aligned to each other (39), which are exposed by their inner side and configure support points hinged to the upper rear edge of the plucking cart (5) .

5) CASSAVA HARVESTING MACHINE of claim 1, characterized by the plucking cart (5) comprising a triangular section structure formed by three lengthwise and parallel stringers, being two lower tubular stringers (40) and an upper stringer with inverted U-shaped profile (41), being the latter and the first two being interlinked by inverted U-shaped supports (42) under equal distances, wherein the first front stringer has sufficient distance to leave the two edges of the lower stringers (40) free, one of which receives the simple wheel (R2), the same happening at the upper edges, but, on that point, ail of them are structurally interlinked by a parallelepiped box (43), wherein the edges of the lower stringers (40) penetrate until a medium point and are welded to the walls of said box (43), which also has two small tubes (44) fixed at their upper front corners, aligned to each other and turned towards outside, constituting pénétration bearings or fixtures for the edges of the axes (39) of the head (4); said box (43) has an upper closing (45) and there is another similar plate closing (46) below it, forming another box (47) which, jointly with the bottom (48), forms points of support for an activation set formed by a hydraulic engine (49) fixed over the first upper closing (45) which, on the other hand, is pierced by the axis of said hydraulic engine which, inside the second box (47), receives a gearing (50) and the respective transmission chain (51) coupled to

4/8 another gearing (52) joint to the upper edge of an axis (53) which, on the other hand, has another gearing (54) below the first gearing (52) which is synchronized to another gearing (55) of a second axis (56), wherein the latter and the previous one hâve lower edges with bearings over the respective internai walls of the box (43) and, furthermore, said lower edges are equally provided with gearings (57) , aligned side by side with each other and equally receiving plucking belts (58), both equally formed by a chain (59) which, on its inner side, is coupled to a respective gearing (57) and, on the outer side, is coupled to a belt of wavy rubber (60) per se, wherein said coupling is similarly repeated on the front edge of the cart, where there is another pair of gearings (61), similar to the first ones (57), but their axes rotate freely over bearings (62a) and their respective stretching supports (62b) fixed under the edges of the lower stringers (40); both belts of wavy rubber (60) are co-planar side by side with each other, so that their parts abutting each other may be simultaneously displaced above and form jaws; said opposed parts of both belts are kept under tension and guided by three devices, wherein the first two are guiding devices (63a) and (63b), while the third device is a pressing guide device (63c), wherein the first two are distributed along the paths turned towards outside each plucking belt (58), while the third pressing guide device (63) is located along the opposed parts of the plucking belts (58), keeping them swinging and pressed to each other.

6) CASSAVA HARVESTING MACHINE, of claim 5, characterized by each guiding device (63a), repeated in adéquate quantifies, being constituted by a support (64) which, on one edge, is fixed to the respective stringer (40) and is perpendicularly turned towards outside, wherein its free edge has a lengthwise tear (65) which is adjustably fixed to the upper edges of the axes of a pair of freely rotating rollers (66),

5/8 between which the respective part of the belt (58) is guided.

7) CASSAVA HARVESTING MACHINE, of claim 5, characterized by each guiding device (63b), also repeated in appropriate quantifies, being constituted by an L-shaped support (67), which upper edge is folded crosswise behind and forms a fixing flap (68) over the respective stringer (40), while the lower flap (69) receives a sliding corner complémentation (70), over which the respective part of the plucking belt (58) passes, restricted jointly with a support (71) and its respective small roller (72), the latter also having its axis adjustably fixed to a tear (73) of said support (71), fixed crosswise against the first one (68).

8) CASSAVA HARVESTING MACHINE, of claim 5, characterized by each pressing guiding device (63c), repeated in appropriate quantifies, being constituted by two vertical pulleys, a support counter pulley (74) and a floating press (75), between which the opposed parts of the plucking belt (58) pass, wherein the first support pulley (74) has its axis (76) fixed to a support (77) which, on the other hand, is rigidly fixed under the respective stringer (40), while the other pressing pulley (75) has its axis (78) fixed to the edge of a rocker arm (79) which, by means of a medium hinge (80), is fixed under the other stringer (40) and the other edge of said rocker arm (79) is hinged to the edge of a horizontal shaft (81) which, on the other hand, freely pierces a support (82) fixed to the same stringer (40) and, after said support, said shaft is involved by a helical spring (83), having an edge with bearings by said support (81) , while, on the opposite side, it has bearings over the respective edge of the shaft (81), keeping the latter one pulled.

9) CASSAVA HARVESTING MACHINE, of claim 1, characterized by the conveyor belt (6) being constituted by a rectangular box-shaped structure (84), defined by side walls of parallel

6/8 plates (85), joined to each other by a head (86) and the respective front inspection cap (87), while, on the opposite side, it is fully open (88) , and the lower edges of said side walls (85) are also structurally interconnected by reinforced inverted U-shaped crossbeams (89), while its upper edges receive compléments in the form of flaps projected upwards and sloped towards outside, wherein one flap (90) occupies the full extension of the respective wall (85) and a shorter flap (91), resulting in a space (92) for fitting the upper edge of the plucking cart (5), and said flaps (90) and (91) are also externally reinforced by triangular plate squares (93); internally, said box (84) has a belt per se (94) assembled and, for that purpose, the edges of the side walls (85) receive bearings (95), one of which being integrated to a hydraulic engine (96), wherein said bearings receive rear axes (97) and (98), that axis (97) being coupled to the hydraulic engine (96) and both axes also being provided with gearings (99) next to their edges, one pair for each axis, to which chains (100) are coupled, one on each side, interconnected by a plurality of plate bands (101) pierced by openings (102) and having at least one edge which is folded crosswise towards outside in the form of a flap (103); inside the belt (94), a structure is assembled, defined by crossbeams (104a) and lengthwise sliding guides (104b), one on each side, fixed to the internai side of the walls (85) of the box (84) , constituting a sliding support for the side edges of the upper part of the belt (94) .

10) CASSAVA HARVESTING MACHINE, of claim 1, characterized by the compartment (7) comprising three side walls (105a), structured by vertical tubes (105b), one on each corner, and corners (106) on the upper edges, ail of which are interconnected to the châssis structure (1), and the upper and rear sides are also fully open, wherein the upper opening is aligned under the conveyor belt (3), while the

7/8 other open rear side constitutes a gap for inserting and taking off the bag (B) ; on two opposed upper edges of the compartment (7), grasping devices (107) for the handles of the bag (B) are included.

11) CASSAVA HARVESTING MACHINE, of claim 10, characterized by each grasping device (107) being constituted by a tubular axis (108), which edges are rotatingly supported over bearings (109), after one of which the rear edge of said tubular axis (108) is folded crosswise, forming a manually rotating lever (110) ; between both bearings, said tubular axis (108) has two radial pins (111) for coupling the handles of the bag (B); said tubular axis (108) having a locking set defined by parallel collars (112) with holes (113) and a latch (114), wherein the first ones (112) are integrated to the respective bearing (109), while the other one (114) is close to the manually rotating lever (110) and fixed to the tubular axis (108).

12) CASSAVA HARVESTING MACHINE, of claim 1, characterized by the sliding ramp (8) being formed by a quadrangular plate (115) which, besides having dimensions so to be the closing bottom of the compartment (7), is also structured by the lower part with profile crossbeams (116) and tubular outline (117) , the latter granting means for said quadrangular plate (115) to be slidingly fitted to corners forming guiding rails (118), located at one of its edges and one on each side under the structure of the châssis (1), wherein the respective edge of the quadrangular plate (115) also has a support (119), wherein it is hinged to the edge of a hydraulic cylinder (120), which opposed edge, with the same shape and another support (121), is hinged to the respective part of the châssis (1).

13) CASSAVA HARVESTING MACHINE, of claim 1, characterized by the double wheels (RI) being constituted by a plate fork (122), which rear edge has a crosswise plate (123) fixed to the closing plates (23) of the châssis (1), while, by the

8/8 opposed or rear edge, said fork (122) has bearings (124) to support the axis (125) ended by other bearings (126) integrated to the wheels (127) .

14) CASSAVA HARVESTING MACHINE, of claim 1, characterized by the simple wheel (R2) and the respective height adjusting device (D) comprising a complementary lying L tube structure (128), having an edge fixed over and close to the front edge of the respective stringer (40) , while, on its other edge, a vertical wrist (129) is fixed, holding and fixing an equally vertical telescopic set, defined by two parts, one external fixed part (130) and a moving internai part (131), the latter with its lower edge fixed crosswise to the axis (132) of the wheel (133), while, on its upper edge, an internally threaded glove (134) is fixed, receiving a spindle (135) which, on the other hand, has its upper edge rotatingly coupled to the respective edge of the fixed external part (130), wherein it receives a crank—like complément (136).

15) CASSAVA HARVESTING MACHINE, of claim 1, characterized by comprising a hydraulic cylinder (137), having its rear edge hinged to a support (138) which, on the other hand, is fixed to the respective part of the head (4), while its other edge has an oblong ring (139), wherein a pin (140) is floating and, on the other hand, fixed to one of those supports (42) of the plucking cart (5) structure.