BR102019003809B1 - WASTE EXTRACTOR ASSEMBLY FOR AGRICULTURAL MACHINERY AND HARVESTING MACHINE - Google Patents

Abstract

waste extractor set for agricultural machinery and harvester machine. The present invention refers to a new waste extractor set for harvesting machines for tall and stalky plants, such as sugarcane and sorghum harvesters, with said extractor set being developed to improve the transport conditions of the machines, but also to optimize lubrication. of the fan bearings, ensuring adequate lubrication of the bearings. more particularly, the waste extractor assembly of the present invention is formed by the arrangement of a fan (56, 80) provided with a support arm (90) that extends downwardly from the cover of the extractor assembly, the lower end of which support arm is associated with a sleeve (91) within which a motor unit (92) is installed, which is associated with a drive shaft (93) which, in turn, is supported by rolling bearings (94a, 94b) and it is also coupled to the propeller (59) through the hub (59a) where the blades (59b) are fixed.

Description

FIELD OF INVENTION

[0001] The present invention generally refers to a new waste extractor assembly for agricultural machines, such as those known as tall and stalky plant harvesters. More particularly, said waste extractor assembly comprises features developed to improve the transport conditions of the machines, but also to optimize the lubrication of the bearings of said fan. Also, the present invention deals with a harvester intended for harvesting tall and stalky plants, such as a sugar cane harvesting machine, which has at least one residue extractor, according to the object of the invention.

BACKGROUND OF THE INVENTION

[0002] There are in the state of the art numerous models of agricultural equipment and machines developed to provide increased productivity in the harvesting of different types of vegetable crops, for example, grain harvesters, forage harvesters and, also, so-called harvesting machines. tall, stalky plants, such as sugar cane and sweet sorghum.

[0003] The machines intended for harvesting these tall, stem-like plants are designed and developed to enable the harvesting of this specific type of crop, because their intrinsic characteristics require specific conditions for their adequate processing, from cutting to transfer to the transshipments and/or trailers.

[0004] In this context, it is known that these harvesting machines for tall and stalky plants comprise a chassis that supports a series of conveyor and chopper rollers responsible for driving and chopping the sugar cane into billets, which are transferred to the transfers and/or trailers using an elevator.

[0005] As should be appreciated by those skilled in the art, these conveyor and chopper rollers carry, in addition to sugarcane or sorghum, a plurality of other waste, such as leaves, branches, earth, which are dragged into the machine according to their displacement. in the field. Thus, to promote the separation of the harvested material and transfer only the sugarcane or sorghum billets to the transshipments and/or trailers, these harvesting machines comprise a material cleaning system, normally consisting of a primary waste extractor positioned at the exit of the chopper rollers, and a secondary waste extractor arranged at the exit of said elevator at the time when sugarcane and sorghum billets are being dumped into transshipments and/or trailers.

[0006] These extractors usually comprise fans that are designed with an aerodynamic shape to form a vortex capable of generating a suction or vacuum force sufficient to capture the waste and expel it out of the machine through said extractors. To this end, in accordance with the material cleaning systems of these state-of-the-art machines, these fans are formed by blades and also by a support bearing protection structure whose purpose is, in addition, to protect the fan hub and the bearing itself, assists in the formation of the vortex to extract residues lighter than billets.

[0007] One of the drawbacks observed in the state of the art is in relation to the arrangement of the motor units of these cleaning systems, especially in the case of the primary waste extractor assembly, since it is located on the cover of this extractor assembly and, consequently, ends up increasing the height of the machines. In other words, the aforementioned motor unit of the primary waste extractor assembly is the highest part of the state-of-the-art machines and, as a result, ends up causing some inconveniences related to the transport of these machines on public roads, such as streets and roads, mainly when there are bridges, tunnels, and suspended electrical networks along the path. In these cases, it is common to need to disassemble the primary waste extractor set before transport and assembly when arriving at the destination, requiring technicians, tools and appropriate structures at the destination for the correct and safe installation of this equipment.

[0008] Another drawback of these waste extractor sets is in relation to the maintenance of the fans, particularly in relation to the lubrication of the fan support bearing, which is difficult to access and in order for it to be adequately lubricated, it is necessary to stop and moving the machine to a workshop, where the protective structure needs to be dismantled to then have access to the fan hub, which also needs to be dismantled to access the aforementioned support bearing.

[0009] Given the complexity and difficulty of accessing the support bearing bearings of these state-of-the-art fans, it is noted that operators and farmers end up extending, or even ignoring, preventive maintenance involving the lubrication of this bearing, mainly, due to the need to stop the machine, which can result in relatively large losses by affecting harvest productivity. As a result, these fans end up having a significantly reduced useful life and, as a logical consequence, end up affecting productivity in some cases even more substantially in the event of a possible fan failure during harvesting in the field.

[0010] In this context, it is possible to see that the material cleaning systems applied to state-of-the-art agricultural machinery lack a practical solution that allows them to be transported fully assembled, without the need to dismantle any equipment, as well as a functional and effective proposal that ensures adequate lubrication of the fan support bearings without, therefore, affecting the productivity of the machine and, mainly, requiring the machine to be stopped and moved to workshops. Furthermore, it is noted that state-of-the-art extractor fans have a substantially reduced useful life, mainly due to the difficulty and complexity of the support bearing maintenance process, which is why alternative ways are sought to ensure proper maintenance for , thus ensuring a prolonged useful life of this equipment.

[0011] Therefore, these, among others, are objectives and solutions that are intended to be achieved with the development of the present invention.

DESCRIPTION OF THE INVENTION

[0012] Therefore, the present invention aims to provide a new residue extractor applied to a harvesting machine, such as sugarcane and sorghum harvesters, which comprises technical, constructive and functional characteristics designed and developed to reduce the height of the machines and , consequently, facilitating the transport process of these machines and also increasing the useful life of the waste extractor sets to, therefore, increase the effective productive time of said machines.

[0013] More particularly, it is one of the objectives of the present invention to provide a residue extractor for agricultural machinery that comprises a motor unit installed within the support bearing protection structure in order to reduce the final height of the machine, but also improve lubrication of the fan support bearings. Thus, substantially simplifying the process of transporting the machines, as well as eliminating the need to disassemble this equipment to lubricate the bearings.

[0014] It is also another object of the present invention to provide a harvesting machine, particularly intended for harvesting tall and stalky vegetable crops, such as sugarcane and sorghum, which comprises at least one residue extractor as mentioned above.

[0015] Therefore, with the purpose of achieving the technical and functional effects summarized above, among others, the present invention refers to a waste extractor set for agricultural machinery that comprises a fan equipped with a support arm that extends downwards from the cover of the extractor assembly, with the lower end of this support arm being associated with a sleeve within which a motor unit is installed which, in turn, is associated with a drive shaft supported by rolling bearings and It is also coupled to the propeller through the hub where the blades are fixed.

[0016] According to an embodiment of the present invention, said glove has a configuration to be accommodated within a housing formed by at least one upper deflector structure. Optionally, the sleeve is disposed within a housing formed by an upper deflector structure and a lower deflector structure, which comprise the cap configuration.

[0017] Additionally, this housing may comprise an intermediate portion for enclosing the hub and has a substantially cylindrical configuration whose edges are consistent with the edges of said upper and lower deflector structures.

[0018] According to another embodiment and assembly of said housing, the upper deflector structure comprises a peripheral flap locked directly onto the propeller hub, and the opposite end is associated with a movable sleeve that extends along the entire length. of the support arm. And said lower deflector structure comprises an extreme hollow central recess for accommodating a fixing element that is locked close to the end of the drive shaft.

[0019] Furthermore, according to yet another embodiment of the present invention, this driving shaft comprises at least one lubrication channel in communication with said rolling bearings.

[0020] Another relevant point according to an embodiment of the present invention is in relation to the configuration of the driving shaft that has a base for connection with the motor unit provided with a concave recess for circulation of lubricating fluid.

[0021] In a complementary way, and in accordance with another embodiment of the present invention, said glove comprises a fluid circulation system that is formed by capillary, supply and outlet hoses, which are connected, respectively, downstream of said rolling bearings.

[0022] According to another embodiment of the present invention, the support arm is fixed and internally accommodates the electrical, electronic and hydraulic components of the motor unit, which can be an electric motor or a hydraulic motor.

[0023] As mentioned above, the present invention also deals with a harvesting machine, of the type for harvesting tall and stalky plants, which is formed by a chassis mounted on wheels or tracks, an engine, an operator's cabin and at least a waste extractor assembly as defined in any one of the preceding claims, in which the fan is formed by a support arm extending downwardly from the cover of the extractor assembly and the lower end of which is associated with a sleeve within which it is A motor unit is arranged that is associated with the propellers through a driving shaft.

[0024] According to a particular embodiment of the harvesting machine, object of the present invention, said drive shaft of the fan of the extractor assembly comprises at least one lubrication channel in communication with the rolling bearings.

[0025] Finally, said harvester machine, according to the present invention, is intended for harvesting sugar cane.

BRIEF DESCRIPTION OF FIGURES

[0026] The characteristics, advantages and technical effects of the present invention, as highlighted above, will be better understood, and more appropriately, by a person skilled in the art based on the detailed description below, made merely by way of example, and not restrictive, of preferred embodiments, and with reference to the attached figures, which: Figure 1 is a schematic side view of a harvesting machine intended for harvesting tall and stalky vegetable crops, such as sugarcane and sugarcane sorghum; Figure 2 is a schematic side view of the fan of a waste extractor set for agricultural machinery, object of the present invention; Figure 3 is a schematic sectional side view of the fan of a waste extractor for agricultural machinery, in accordance with the present invention; It is. Figure 4 is an enlarged view of the region of the sleeve housing the fan motor unit of a waste extractor set for agricultural machinery, object of the present invention.

DESCRIPTION OF EMBODIMENTS OF THE INVENTION

[0027] The invention will now be described with respect to its particular embodiments, with reference to the attached figures. Such figures are schematic, and their dimensions and/or proportions may not correspond to reality, as they only aim to describe the invention in a didactic way. Furthermore, certain known and common construction details may have been omitted for greater clarity and conciseness in the description that follows. The reference numbers used are repeated throughout the figures to identify identical or similar parts. The terms eventually used such as “above”, “below”, “front”, “back”, “right”, “left” etc. and its variants must be interpreted according to the guidance given in Figure 1.

[0028] Referring now to the drawings, Figure 1 illustrates a side view of an embodiment of an agricultural harvester 10 according to aspects known in the state of the art. The harvester 10 is configured as a sugar cane harvester. However, in other embodiments, the harvester 10 may correspond to any suitable agricultural harvester known in the art, such as sorghum and sugarcane.

[0029] As shown in Figure 1, the combine 10 includes a chassis 12, a pair of front wheels 14, a pair of rear wheels 16, and an operator's cabin 18. The combine 10 may also include a primary power source ( for example, a chassis-mounted engine 12) that powers one or both pairs of wheels 14, 16 via a transmission (not shown). Alternatively, the combine 10 may be a track-driven combine and therefore may include tracks driven by the drive mechanism in replacement of the illustrated wheels 14, 16. The drive mechanism may also drive a hydraulic fluid pump (not shown) configured to generate pressurized hydraulic fluid to drive various hydraulic components of the combine 10.

[0030] Additionally, the harvester 10 may include various components for cutting, processing, cleaning and unloading sugar cane as the cane is harvested from an agricultural field 20. For example, the harvester 10 may include a tip cutter assembly 22 positioned at its front end to intercept sugar cane as the combine 10 is moved in the forward direction represented by the arrow The binder disc 24 can be configured to bind sugar cane stalks so that the cutter disc 26 can be used to cut off the tip of each stalk. Generally, the height of the tip cutting assembly 22 may be adjustable by means of a pair of arms 28 hydraulically raised and lowered as desired by the operator.

[0031] Additionally, the combine 10 may include a row divider 30 that extends upward and rearward from the field 20. In general, the row divider 30 may include two spiral feed rollers 32, also known as "lollipop". Each feed roller 32 may include a soil shoe 34 as its lower end assists the row divider 30 in separating sugar cane stalks for harvest. Furthermore, as shown in Figure 1, the harvester 10 may include a tipping roller 36 positioned near the front wheels 14 and a projection roller 38 positioned behind the tipping roller 36. As the tipping roller 36 is rotated, sugarcane stalks are rotated. Harvested sugar is tumbled while the row divider 30 gathers the crop field stalks 20 into the machine 10. Additionally, as shown in Figure 1, the projection roller 38 may include a plurality of intermittently mounted vanes 40 which assist in forcing the sugar cane stalks down. As the roller 38 is rotated during harvesting, the sugarcane stalks that were tipped by the tipping roller 36 are separated and subsequently tipped by the roller 38 as the harvester 10 continues to be moved forward with respect to the field 20 .

[0032] Still referring to Figure 1, the combine 10 may also include a base cutting assembly 42 positioned behind the roller 38. As is generally understood, the base cutting assembly 42 may include blades (not shown) for cutting sugar cane stalks as the cane is harvested. The blades, located on the periphery of assembly 42, can be rotated by a hydraulic motor (not shown) driven by the vehicle's hydraulic system. Additionally, in various embodiments, the blades may be angled downward to cut the base of the sugar cane as the cane is tumbled by the roller 38.

[0033] Additionally, the harvester 10 may include a set of one or more conveyor rollers 44 located downstream of the base cutting assembly 42 to move the cut stalks of sugar cane from the base cutting assembly 42 along the processing path. As shown in Figure 1, the conveyor roller assembly 44 may include a plurality of lower rollers 46 and a plurality of upper rollers 48. As sugar cane is transported through the conveyor roller assembly 44, waste (e.g., stones, dirt and/or the like) can also be transported or fall through the lower rollers 46 onto the field 20.

[0034] Additionally, the harvester 10 may include a chopper assembly 50 located at the downstream end of the conveyor roller assembly 44 (e.g., adjacent to the rearmost lower and upper conveyor rollers 46, 48). In general, the chopper assembly 50 may be used to cut or chop harvested sugarcane stalks into smaller pieces or “fragments” 51 that may, for example, measure 15.24 centimeters (six (6) inches), also called billets or grindstones. The fragments 51 may then be propelled toward an elevator assembly 52 of the harvester 10 to be collected in an external receiver or storage device (not shown).

[0035] As is generally understood, pieces of waste 53 (e.g., dust, dirt, leaves, etc.) separated from the sugarcane fragments 51 can be expelled from the combine 10 through a primary waste extractor assembly 54 , which is located behind the chopper assembly 50 and is oriented to direct the waste 53 out of the combine 10. Additionally, a fan 56 may be mounted on the primary extractor 54 to generate a suction force or vacuum sufficient to capture the waste 53 and force the residues 53 through the primary extractor 54. The residues 53 are then directed outward and generally in the opposite direction of the combine 10 through an outlet of the primary extractor 54. The separated fragments 51 and heavier than the residues 53 being expelled from the extractor 54, they can then fall to the elevator assembly 52.

[0036] As shown in Figure 1, the elevator assembly 52 may generally include an elevator housing 58 and an elevator 60 that extends within the elevator housing 58 between a lower proximal end 62 and an upper distal end 64. In general, the elevator 60 may include a conveyor chain or belt 66 and a plurality of paddles or flights 68 coupled to or evenly spaced on the chain 66. The flights 68 may be configured to hold the sugar cane fragments 51 in the elevator 60 as the fragments 51 are elevated towards the top of the elevator 70. Additionally, the elevator 60 may include lower and upper sprockets 72, 74 positioned around the proximal and distal ends 62, 64, respectively. As shown in Figure 1, an elevator motor 76 may be coupled to one of the sprockets (e.g., the upper sprocket 74) to drive the chain 66, thereby allowing the chain 66 and flights 68 to move in a cycle. endless between the proximal and distal ends 62, 64 of the elevator 60.

[0037] Furthermore, pieces of waste 53 (e.g., dust, dirt, leaves, etc.) separated from the sugarcane fragments 51 can be expelled from the harvester 10 through a secondary waste extractor assembly 78 coupled to the rear end of the elevator 58. As shown in Figure 1, the secondary extractor 78 may be situated adjacent the distal end 64 of the elevator 60 and may be oriented to direct waste 53 away from the combine 10. Additionally, a fan 80 may be mounted on the secondary extractor 78 to generate a suction or vacuum force sufficient to extract the waste 53 and force the waste 53 through the secondary extractor 78. The separated fragments 51, heavier than the waste 53 expelled through the extractor 78, may then fall from the distal end 64 of the elevator 60. Typically, fragments 51 may fall through a discharge opening 82 of the elevator assembly 52 into an external storage device (not shown), such as a cart, an overflow, a bucket etc.

[0038] During operation, the harvester 10 is traveled throughout the agricultural field 20 to harvest sugar cane. After the height of the tip cutter 22 is adjusted (if used) by means of the arms 28, the agglutinating disc 24 in the tip cutter assembly 22 can be operated to bind the sugarcane tips as per the harvester 10 proceeds through the field 20, while the cutter disc 26 cuts the leafy ends of the sugarcane stalks to dump them along both sides of the combine 10. As the stalks enter the row divider 30, the shoes 34 can configure the width of the operation to determine the amount of sugar cane that enters the harvester's input opening 10, either in a fixed or adjustable manner. The lollipops 32 then bind the stems together at the machine inlet to allow the tipping roller 36 to bend the stems downward in conjunction with the action of the finned roller 38. Since the stems are positioned at an angle as shown in Figure 1, the base cutting assembly 42 can then cut the base of the field stalks 20. The cut stalks are then directed to the conveyor roller assembly 44.

[0039] The cut stalks of sugar cane are transported backwards by conveyor rollers 46, 48 which compress the stalks and the harvested matter. At the downstream end of the conveyor roller assembly 44, the chopper assembly 50 cuts or chops the compacted sugarcane stalks into pieces or fragments 51. Conveyed residues 53 (e.g., dust, dirt, leaves, etc.) separated of sugar cane fragments 51 are then extracted through the primary residue extractor assembly 54 using the suction or vacuum created by the fan 56. The separated/washed fragments 51 then fall into the elevator assembly 52 and travel to upward through the elevator 60 from its proximal end 62 to the distal end 64. During normal operation, once the fragments 51 reach the distal end 64 of the elevator 60, the fragments 51 fall through the discharge opening 82 to an external storage device. Similar to the primary extractor 54, waste is blown out of the combine 10 through the secondary waste extractor assembly 78 with the aid of the fan 80.

[0040] A harvester as described above may be a sugarcane harvester that may comprise and receive the waste extractor assembly according to the present invention, and said harvester machine 10 may be, for example, a machine known in the prior art, such as the sugarcane harvester from CNH Industrial N.V. sold under the Case IH brand.

[0041] The terms referred to here as harvester, harvester and their variants are used interchangeably to designate a machine for harvesting vegetable crops.

[0042] Referring now to Figures 2 and 3, it is possible to observe the fan 56, 80 of a waste extractor assembly according to the present invention, which can be either the primary 54 or the secondary 78 mentioned above. Said fan 56, 80 comprises a support arm 90 which extends downwardly from the cover of the extractor assembly 54, 78 and whose lower end is associated with a sleeve 91 within which a motor unit 92 is arranged which, in turn, time, it is associated with a driving shaft 93 supported by rolling bearings 94a, 94b and coupled to the propeller 59 through the hub 59a where the blades 59b are fixed.

[0043] According to an embodiment of the present invention, said sleeve 91 is configured to be accommodated within a housing 57 formed by at least one upper deflector structure 57a. Optionally, said housing 57 comprises a lower deflector structure 57b, with said upper 57a and lower deflector structures 57b comprising a cap configuration to, thereby, generate an anti-vortex effect of entry and exit of waste passing through the extractor assembly.

[0044] Additionally, this housing 57 may comprise an intermediate portion 57c whose purpose is to surround the hub 59a and, furthermore, has a substantially cylindrical configuration so that its edges are consistent with the edges of said upper 57a and lower 57b deflector structures. .

[0045] According to an embodiment and assembly of said housing 57, the lower deflector structure 57b may comprise an extreme central recess 57b' hollowed out to accommodate a fixing element 94 which is locked at the end of said drive shaft 93. The upper deflector structure 57a comprises a peripheral flap 57a' which is locked directly over the hub 59a of the propeller 59, and the opposite end is associated with a movable sleeve 95 which extends along the entire length of said support arm 90 to surround it and protect it.

[0046] Another relevant point of the present invention is related to the configuration of said drive shaft 93, whose base 93b responsible for connection with the drive unit 92 is provided with a concave recess 93b' which aims to improve the circulation conditions of the fluid. lubrication, since the circular movement of said drive shaft 93 causes a centrifugal force to arise that favors the movement and circulation of the lubricating fluid.

[0047] Still, according to another embodiment of the present invention, said drive shaft 93 comprises at least one lubrication channel 93a responsible for supplying lubricating fluid to said rolling bearings 94a, 94b. Complementarily, said sleeve 91 comprises a fluid circulation system that is formed by capillary, supply 96a, and outlet 96b hoses, which are connected, respectively, downstream of the rolling bearings 94a, 94b so that, in this way, In this way, provide cooling of the fluid that lubricates these bearings. In this case, as must be appreciated by those skilled in the art, the maintenance of the extractor assembly becomes even more effective and functional, considering that the bearings 94a and 94b are kept lubricated without the need to dismantle the structure of the extractor assembly.

[0048] Said support arm 90 is fixed and can accommodate all electrical, electronic and hydraulic components of the motor unit 92, such as electrical cables and harnesses, conduits and hydraulic hoses, considering that said motor unit 92 can be a motor electric, or a hydraulic motor that can even take advantage of the pressurized hydraulic fluid generated by the pump driven by the motor mechanism usually available in harvesting machines 10.

[0049] As mentioned above, the present invention also deals with a harvesting machine 10, such as for harvesting tall and stalky plants, said machine 10 comprising at least one extractor assembly whose fan 56, 80 comprises an arm support 90 which extends downwards from the cover of the extractor assembly 54, 78 and whose lower end is associated with a sleeve 91 within which a motor unit 92 is arranged which is associated with the propeller 59 via a drive shaft 93. According to a particular embodiment of the present invention, this harvesting machine 10 is a sugarcane or sorghum harvester.

[0050] According to a particular embodiment of the harvesting machine, object of the present invention, said drive shaft 93 comprises at least one lubrication channel 93a in communication with said rolling bearings 94a, 94b, thereby eliminating the need disassemble the assembly for maintenance and lubrication of these bearings.

[0051] The present description aims only to present and define, by way of example, preferred embodiments of the waste extractor set for harvesting machines for tall and stalky plants, according to the present invention. Therefore, as those skilled in the art must appreciate, various modifications and combinations of equivalent elements and details are possible without thereby departing from the scope of protection defined by the attached claims.

Claims (12)

1. RESIDUE EXTRACTOR ASSEMBLY FOR AGRICULTURAL MACHINERY, which comprises a fan (56, 80) equipped with a support arm (90) that extends downwards from the cover of the extraction assembly, the lower end of said support arm being is associated with a sleeve (91) within which a motor unit (92) is installed, which is associated with a drive shaft (93) which is supported by rolling bearings (94a, 94b) and is also coupled to the propeller ( 59) through the hub (59a) where the blades (59b) are fixed, characterized by the fact that said sleeve (91) comprises a configuration to be accommodated within a housing (57) formed by at least one upper deflector structure ( 57a), and wherein said driving shaft (93) comprises a base (93b) for connection with the motor unit (92) which is provided with a concave recess (93b') for lubricating fluid circulation. 2. RESIDUE EXTRACTOR ASSEMBLY FOR AGRICULTURAL MACHINERY, according to claim 1, characterized by the fact that said sleeve (91) is disposed within a housing (57) formed by an upper deflector structure (57a) and a deflector structure bottom (57b), which comprise the cap configuration. 3. RESIDUE EXTRACTOR ASSEMBLY FOR AGRICULTURAL MACHINERY, according to claim 1 or 2, characterized by the fact that said housing (57) further comprises an intermediate portion (57c) to surround said hub (59a) and has a substantially cylindrical configuration whose edges are concordant with the edges of said upper (57a) and lower (57b) deflector structures. 4. RESIDUE EXTRACTOR ASSEMBLY FOR AGRICULTURAL MACHINERY, according to claim 1 or 2, characterized by the fact that said upper deflector structure (57a) comprises a peripheral flap (57a') locked directly onto said hub (59a) of the propeller (59), and the opposite end is associated with a movable sleeve (95) that extends along the entire length of said support arm (90). 5. RESIDUE EXTRACTOR ASSEMBLY FOR AGRICULTURAL MACHINERY, according to claim 2, characterized by the fact that said lower deflector structure (57b) comprises an extreme central recess (57b') hollow to accommodate a fixing element (94) , which is locked at the end of said drive shaft (93). 6. RESIDUE EXTRACTOR ASSEMBLY FOR AGRICULTURAL MACHINERY, according to claim 1, characterized by the fact that said drive shaft (93) comprises at least one lubrication channel (93a) in communication with said rolling bearings (94a, 94b). 7. WASTE EXTRACTOR ASSEMBLY FOR AGRICULTURAL MACHINERY, according to claim 1, characterized by the fact that said sleeve (91) comprises a fluid circulation system that is formed by capillary, supply (96a) and outlet hoses (96b), which are connected, respectively, downstream of said rolling bearings (94a, 94b). 8. WASTE EXTRACTOR ASSEMBLY FOR AGRICULTURAL MACHINERY, according to claim 1, characterized by the fact that said support arm (90) is fixed and internally accommodates the electrical, electronic and hydraulic components of said motor unit (92). 9. WASTE EXTRACTOR ASSEMBLY FOR AGRICULTURAL MACHINERY, according to claim 1, characterized by the fact that said motor unit (92) is an electric motor or a hydraulic motor. 10. HARVESTING MACHINE, of the harvester type for tall and stalky plants, formed by a chassis (12) mounted on wheels (14, 16) or tracks, an engine, an operator's cabin (18) and at least one residue extractor assembly (54, 78) as defined in any one of the preceding claims, and said fan (56, 80) comprising a support arm (90) extending downwardly from the cover of the extractor assembly (54, 78) and the lower end of which is associated with a sleeve (91) within which a motor unit (92) is arranged which is associated with the propellers (59) through a driving shaft (93), characterized by the fact that said sleeve (91 ) comprises a configuration to be accommodated within a housing (57) formed by at least one upper deflector structure (57a), and wherein said driving shaft (93) comprises a base (93b) for connection with the motor unit (92 ) which is equipped with a concave recess (93b') for lubricating fluid circulation. 11. HARVESTING MACHINE, according to claim 10, characterized by the fact that said drive shaft (93) comprises at least one lubrication channel (93a) in communication with the rolling bearings (94a, 94b). 12. HARVESTING MACHINE, according to claim 10, characterized by the fact that it is intended for harvesting sugar cane.