IMPROVEMENT IN CUTTING DISCS FOR AGRICULTURAL MACHINES AND IMPLEMENTS

Description

1 / 5 IMPROVEMENT IN CUTTING DISCS FOR AGRICULTURAL MACHINES AND IMPLEMENTS FIELD OF THE INVENTION

[01] The present invention describes an improvement in a cutting disc for agricultural machines and implements equipped with a cap mounted statically to the hub assembly, acting simultaneously as a sealing element, cutting aid and anti-clogging mechanism. BACKGROUND OF THE INVENTION

[02] Cutting discs are fundamental components in modern agriculture, acting as the first interface between the machine and the soil, especially in no-till systems. Their function is to perform precise shearing of plant biomass (straw) and the opening of the initial furrow, ensuring that crop residues do not interfere with seed deposition.

[03] However, in field operations, these devices face severe challenges, such as debris clogging between the disc and the support, premature bearing wear due to soil abrasiveness, and fluctuations in cut quality.

[04] The state of the art describes technical solutions to prevent clogging or tangling of the straw.

[05] Document BR102024008603 describes a semicircular geometry rod with elastic deformation memory that extends around the perimeter of the cutting disc, said rod keeping the disc faces always clean.

[06] Document PI0404813 describes a straw pressing mechanism in the form of a hinged plate with two folds arranged in its lower portion, and whose main function Petition 870260071196, dated 07 / 17 / 2026, page 8 / 13 2 / 5 involves pressing down the straw that is deposited in thick layers on the soil, with this sheet being attached to the planting row's support claw via a support that has a pivot point allowing for vertical soil-copying movements.

[07] Additionally, wheel hub protectors are provided to prevent dirt from entering and interfering with the bearings.

[08] Document PI7904706 describes a dust guard to cover the axial clearance between a metal hub of a vehicle wheel and an adjacent metal thrust flange of a bearing disposed on the wheel axle to support a traction motor.

[09] However, existing solutions for wheel hub guards do not prevent the accumulation of debris (clogging) in the hub. In agricultural equipment, where straw tends to accumulate between the disc and the support, conventional wheel hub guards rotate together with the disc, which causes clogging and straw wrapping.

[010] Thus, the present invention relates to an improvement in a cutting disc equipped with a cap mounted statically to the wheel hub assembly that acts simultaneously as a sealing element, cutting aid and anti-clogging mechanism. SUMMARY

[011] The invention describes an improvement in a cutting disc for agricultural machines and implements that makes it difficult for straw to wrap around the hub, thus preventing the disc from jamming due to excessive straw buildup between the disc and the support.

[012] The invention describes an improvement in a cutting disc for Petition 870260071196, dated 07 / 17 / 2026, p. 9 / 13 3 / 5 agricultural machinery and implements that protects the cutting disc bearings against the entry of impurities and contaminants.

[013] The invention describes an improvement in a cutting disc for agricultural machines and implements that contributes to the cutting of the disc by means of compression of the straw. BRIEF DESCRIPTION OF THE FIGURES

[014] Figure 1 shows a perspective view of the cutting disc support attached to the implement or machine chassis.

[015] Figure 2A shows a perspective view of the cutting disc support.

[016] Figure 2B shows a side view of the cutting disc support.

[017] Figure 2C shows the front view.

[018] Figure 2D shows the top view.

[019] Figure 3A shows the top view of the cutting disc.

[020] Figure 3B shows the cross-sectional view BB.

[021] Figure 4A shows an exploded perspective view of the cutting disc.

[022] Figure 4B shows an exploded side view of the cutting disc. DETAILED DESCRIPTION OF THE INVENTION

[023] The improvement in cutting disc for agricultural machines and implements, object of the present invention, comprises a support (100) that includes a fork (10) fixed to the chassis (200) of the machine or agricultural implement. The fork (10) has, at its end opposite the fixing, a through hole (11) in which a shaft (110) is disposed.

[024] Between the fork flanges (10) is positioned a cutting disc (30), equipped with a central through hole (31) in which a hub (20) is fixed, which incorporates a bearing (21). Inside the bearing (21) is housed the Petition 870260071196, dated 07 / 17 / 2026, page 10 / 13 4 / 5 less a bearing (211), allowing free rotation of the disc (30) around the shaft (110) associated with the support (100) by means of the through hole (11).

[025] The bearing (21) is equipped with at least one retainer (22), whose function is to prevent the entry of dirt, moisture and vegetable residues into the interior of the bearing, as well as to retain the lubricant used in the bearings.

[026] The cutting disc (30) is held axially positioned by fastening elements (41) and elastic rings (42), ensuring the stability of the disc during operation.

[027] On the inner surface of the fork tabs (10), in opposite positions, a circular cap (40) is arranged, provided with a convex outer surface, the cap (40) being mounted in alignment with the bearing (21) and fitted to the outer part of the hub (20).

[028] The cap (40) protects the retainer (22) and the bearing (211) against the entry of dirt, moisture, straw, and other contaminants. Furthermore, because it is a static element and has a convex outer surface, the cap (40) inhibits straw wrapping during operation.

[029] In operation, the cap (40), being pressed and held fixed by the fork (10) of the cutting disc support, remains stationary in relation to the ground, while the hub (20) and the cutting disc (30) rotate together. This configuration causes the cap (40) to press the straw against the ground, reducing its mobility.

[030] As a result, the straw is kept under controlled pressure, allowing the cutting disc (30) to make a more even cut. Petition 870260071196, dated 07 / 17 / 2026, page 11 / 13 5 / 5 and efficient, significantly minimizing the wrapping of plant debris around the hub and rotating assembly. Petition 870260071196, dated 07 / 17 / 2026, page 12 / 13

Claims

1 / 1 CLAIM 1. IMPROVEMENT IN CUTTING DISC FOR AGRICULTURAL MACHINES AND IMPLEMENTS comprising a support (100) with a fork (10) fixed to a chassis (200), having a through hole (11) at its end for the placement of a shaft (110), where between the fork flanges (10) is positioned a cutting disc (30) equipped with a hub (20) with bearing (21) and bearings (211) for free rotation, characterized by comprising a cap (40) of circular shape, provided with a convex outer surface, disposed on the inner surface of the fork flanges (10) in opposite positions, mounted in alignment with the bearing (21), fitted into the outer part of the hub (20) and held fixed by the fork (10), constituting a static element in relation to the ground. Petition 870260071196, dated 07 / 17 / 2026, page 13 / 13

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