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BR-102024017700-A2 - SYSTEM FOR ADJUSTING THE ATTACK ANGLE OF A HARVESTING PLATFORM THROUGH A COUPLING

BR102024017700A2BR 102024017700 A2BR102024017700 A2BR 102024017700A2BR-102024017700-A2

Abstract

The present invention describes a system for adjusting the angle of attack of a harvesting platform (100) by means of a coupling (200), wherein the coupling (200) comprises a main structure (210), bearing means (214), hydraulic cylinders (215) and a secondary structure (220), and wherein the harvesting platform (100) comprises at least one chassis comprising structural elements (110) to receive the bearing means (214) of the coupling (200).

Inventors

  • Assis Strasser

Assignees

  • GTS DO BRASIL LTDA.

Dates

Publication Date
20260310
Application Date
20240828

Claims (11)

  1. 1. System for adjusting the angle of attack of a harvesting platform (100) by means of a coupling (200), the system characterized in that: the coupling (200) comprises: a main structure (210) composed of lateral (211), upper (212) and lower (213) structural columns, and in which the main structure (210) further comprises: bearing means (214) at the lower lateral ends of the respective lateral columns (211); hydraulic cylinders (215) embedded and bearing-mounted in an upper region of the respective lateral columns (211), in which a first end (2151) is connected to the coupling (200) and a second end (2152) is connected to the harvesting platform; a secondary structure (220), housed inside the main structure (210), and which comprises a coupling mask; and wherein the harvesting platform (100) comprises at least one chassis comprising structural building elements (110) for receiving the bearing means (214) of the coupling (200).
  2. 2. System, according to claim 1, characterized in that the first end (2151) corresponds to a cylinder body and is connected to a respective side column (211) by means of a bearing (2153), and in that the second end (2152) corresponds to a rod and is articulated to the harvesting platform (100).
  3. 3. System according to claim 1, characterized in that the hydraulic cylinders (215) are double-acting hydraulic cylinders.
  4. 4. System according to claim 1, characterized in that it further comprises a hydraulic circuit, embedded in the coupling (200) and/or harvesting platform (100), which comprises a function change valve block with check valve.
  5. 5. System according to claim 1, characterized in that the bearing means (214) are preferably composed of a shaft extending laterally from each of the side columns (211) and a double bearing.
  6. 6. System according to claim 1, characterized in that the bearing means (214) may comprise a protection (2141).
  7. 7. System according to claim 1, characterized in that the coupling mask of the secondary structure (220) is preferably composed of bolted plates.
  8. 8. System according to claim 1, characterized in that the respective side columns (211) of the main structure (210) comprise a recess.
  9. 9. System according to claim 1, characterized in that the upper structural column (212) preferably comprises a shape corresponding to the shape of an upper profile of the harvesting platform chassis (100).
  10. 10. System according to claim 1, characterized in that the structural construction elements (110) preferably form part of the chassis of the harvesting platform (100), being manufactured structurally integrated with the harvesting platform (100).
  11. 11. System, according to claim 1, characterized in that the structural building elements (110) are preferably composed, respectively, of a pair of spaced, parallel plates, and joined by one or more reinforcing structures.

Description

Field of invention: [001] The present invention falls within the field of agricultural machinery, more specifically, the present invention falls within the area of coupling for harvesting platforms, and describes a system for adjusting the angle of attack of a harvesting platform by means of a coupling. Fundamentals of the invention: [002] Adjusting the angle of attack (or tilt) of harvesting platforms on agricultural machinery is important for adapting harvesting platforms to the terrain. Therefore, an incorrectly adjusted angle of attack directly affects the performance of the harvesting platform, and may result in grain loss, material flow, reduced material intake, and other undesirable outcomes. [003] Some adjustment methods require stopping the machine, uncoupling the harvesting platform, disassembling the coupling completely or partially, and adjusting it to the desired position according to predefined increments. Other adjustment methods require complex couplings, usually fixed to a neck/feeder of an agricultural machine. Furthermore, some platforms on the market do not have an option for adjusting the angle of attack, as they have fixed couplings, and therefore, the adjustment can only be made on the combine harvester's neck. [004] However, it is observed that the combine harvester feeders rotate around an axis where, when the cutting height is changed, the inclination of the coupling face in relation to the ground is also changed. Furthermore, the aforementioned adjustment of the inclination in the feeders also serves to absorb differences between combine harvester models. [005] Combine harvester manufacturers do not follow a single standard for the position of the feeder pivot center or for the distance between the pivot center and the coupling face of the neck. Therefore, for the same cutting height and row inclination, the coupling angle adjustment may be in different positions if the combine harvesters are of different models (pivot center height, feeder pivot radius, etc.). [006] With this in mind, advances and developments in harvesting platform coupling systems have sought to provide means of adjustment that allow different angles of attack to be used to suit the condition of each crop when using the same platform, and to perform the adjustment safely for operators. State of the art: [007] Publications and available state-of-the-art knowledge reveal different coupling techniques for agricultural machinery, some allowing a certain degree of adjustment between the coupling and feeders and/or harvesting platforms. [008] Document BR1020210250658 describes a coupling comprising an upper crossbar; at least two side plates; and a lower crossbar; wherein at least two side plates are connected to the upper crossbar by means of protrusions positioned at the ends of said upper crossbar, the upper crossbar being connected in a detachable or detachable manner to the protrusions. The document further teaches that the protrusions comprise an upper pivot pin that passes through a hole in the protrusion, wherein an upper pivot pin is configured to rotate the coupling relative to a harvesting platform at an angle varying up to about 20 degrees. [009] It is noteworthy that document BR1020210250658 uses pins and screws to connect a coupling to a platform chassis in predefined increments. However, these predefined increments limit the possibilities for adjusting the platform's angle of attack. Furthermore, the relative fragility of these fixing points can result in low rigidity of the coupling-chassis assembly. Additionally, the angle of attack adjustment in document BR1020210250658 is done manually, requiring the loosening of screws and rotation of the coupling at the pivot point. [0010] Document EP3090616 describes a cutting angle adjustment of a cutting unit of a self-propelled harvesting machine that has a front housing articulated in a feeder housing via at least one pivot bearing, the front housing accommodating a cutting table equipped with a cutting unit and a slewing angle that occupies the front housing up to the inclined conveyor housing, is adjustable by means of an adjustment device. The adjustment device has at least one adjustment element acting on the front housing on one side and on the feeder on the other side. [0011] However, the adjustment of the angle of the front housing of document EP3090616 is an adjustment made in relation to the neck of a combine harvester. [0012] Document BR1020160063515 describes an agricultural harvester comprising a feeder, wherein the feeder is pivotally mounted to an intermediate frame with respect to a first geometric axis of movement. The intermediate frame is pivotally mounted to a platform mounting frame with respect to a second geometric axis of movement. Pivoting around the first geometric axis of movement and the second geometric axis of movement allows for anteroposterior movement and a lateral tilt movement. At least one lateral tilt actuator is provided