An agricultural tool includes a wheel body and a flexible tire with a hollow chamber and an inner surface around this hollow chamber; a circular opening on the chamber; a pair of beads bordering this opening; and a spacer at least partially tubular with two axially opposite end faces. Over one portion corresponding to one of the beads, the inner surface extends frustoconically by widening radially outward of the flexible tire, and one of the end faces of the spacer has an axially protruding surface. The spacer is placed across the opening of the tire such that the protruding surface engages the inner surface in an area of the portion corresponding to the bead.
A01C 7/20 - Parts of seeders for conducting and depositing seed
B60C 17/06 - Tyres characterised by means enabling restricted operation in damaged or deflated conditionAccessories therefor utilising additional non-inflatable supports which become load-supporting in emergency resilient
An agricultural wheel includes a body including a rim, and a semi-hollow-type tire including a flexible case including a sheath and a tread. The rim includes a seat section, suitable for receiving the tire, and a tool section, suitable for scraping the seed drill disc. The tread has a profile domed towards the outside of the tire. The case includes a first sidewall, close to the tool section, connecting the sheath to the tread. The sidewall extends radially or slightly inclined radially. The rim includes an intermediate axial section which connects the tool section to the seat section. The intermediate section is shaped as an axial stop for the tire which is form fitted with the first sidewall. The tire is mounted on the seat section by means of the sheath in an axially stressed state which maintains the first sidewall in contact against the stop.
A press wheel comprises a rigid body and a semi-tubular tire. The tire comprises a flexible envelope with a sole portion through which the tire is mounted on the rigid body, a tread portion and a pair of sidewalls each one connecting the sole to the tread. The sidewalls extend, at least partially, along a generally concave profile, viewed from the exterior of the tire.
An agricultural roller comprises a tubular support and a series of pneumatic tyres mounted on the support. Each pneumatic tyre of the series has a respective uninflated envelope. The roller further comprises a series of tyres mounted on the support and interleaved in the series of pneumatic tyres. Each tyre has a respective envelope. The tyres are smaller than the pneumatic tyres while their envelope is narrower.
An agricultural tool element includes a non-inflated tire with a tread and a pair of sidewalls each connected to the tread at a respective first end portion. The element additionally includes a rigid, generally annular base on which the tire is fitted on a rotary support of an agricultural tool. The sidewalls are each over-molded on a peripheral portion of the rigid base at a second end portion, opposite the tread.
A tire for a furrow press roller comprises a sole via which the tire is mounted on a field roller support, a tread opposite to the sole, and two sidewalls connecting the tread to the sole. The sole, the tread and the sidewalls together delimit a non-inflatable chamber. The tread comprises at least one crest and two shoulders each connecting the crest to a respective sidewall. The chamber extends partially at least laterally under the shoulders and radially into the crest.
An agricultural tool used to form furrows includes a generally cylindrical support and a plurality of tires. Each tire includes a sole by way of which the tire is mounted on the support, a tread opposite the sole (3) and two sidewalls that connect the tread to the sole. The sole, the tread (5) and the sidewalls jointly form a deformable casing. The tread of at least one of the plurality of tires has a generally domed shape. The sidewalls of this tire are generally inclined radially. The domed shape of the tread and the inclination of the sidewalls are such that the deformation of the casing urges the sole axially outward.
A wheel for working the fields comprises a wheel body comprising a pair of flanges and a spacer, and a tire cover, generally annular, comprising two side walls, a tread connecting the side walls to one another and an opening opposite to the tread. The tire cover is mounted on the wheel body in such a way that the spacer is positioned across its opening. The flanges are arranged in such a way as to block the side walls of the tire cover against the spacer in the vicinity of the opening.
A non-inflatable tire for an agricultural implement, including a sole, a tread, and a pair of sidewalls connecting the sole to the tread is provided. A first sidewall extends from the sole to the tread, while the second includes an internal portion which extends from the sole to the tread and an external portion projecting from the tread. The first sidewall and the tread are designed so as to jointly hold the external portion of the second sidewall in line with the internal portion.
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Rollers for agricultural vehicles, agricultural machine
tools, agricultural implements other than hand-operated. Tires, wheels, wheel rims and tracks for agricultural
vehicles.
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Rollers for agricultural vehicles, belts for agricultural
machines, agricultural machine tools, agricultural
implements other than hand-operated. Tires, wheels, wheel rims and tracks for agricultural
vehicles.
12 - Land, air and water vehicles; parts of land vehicles
17 - Rubber and plastic; packing and insulating materials
Goods & Services
Rollers for agricultural vehicles, agricultural machine
tools, agricultural implements other than hand-operated,
agricultural machine belts. Tires, wheels, wheel rims and tracks for agricultural
vehicles, suspension shock absorbers for vehicles. Hoses, shock-absorbing buffers of rubber.
A tool for working in fields includes a first flange and a second flange which mount one on the other, forming a wheel body. The first flange includes a central portion, a generally annular peripheral portion and arms which connect the central portion and the peripheral portion to each other. The second flange is homologous to the first flange. In the assembled state, the wheel body has a rim which is formed together by the peripheral portion of the first flange and the homologous peripheral portion of the second flange and a hub which is formed by the central portion of the first flange. The central portion of the second flange receives the hub which is formed by the central portion of the first flange.
A tool for working in fields includes a first flange and a second flange which mount one on the other, forming a wheel body. The first flange includes a central portion, a generally annular peripheral portion and at least one arm which connect(s) the central portion and the peripheral portion to each other. The second flange is homologous to the peripheral portion of the first flange. In the assembled state, the wheel body has a rim which is formed together by the peripheral portion of the first flange and the second flange and a hub which is formed by the central portion of the first flange.
An agricultural machine tool includes a wheel body which includes a hub, a rim and at least two arms which each connect the hub and the rim to each other. At least one aperture is provided between the two arms and the rim, and has a closed contour. The tool includes a component which forms an accessory having a profiled portion having a shape which generally corresponds to the closed contour, and a generally superficial portion which terminates the profiled portion. The profiled portion is introduced at one side of the wheel body into the aperture, closing the aperture by form-fitting cooperation. A set of fixing members ensures the retention of the component in a final position, in which the superficial portion moves into a flush state with the arms, at least in the region of the contour.
A01C 7/20 - Parts of seeders for conducting and depositing seed
B60B 3/00 - Disc wheels, i.e. wheels with load-supporting disc body
A01C 5/06 - Machines for making or covering drills or furrows for sowing or planting
B60B 7/04 - Wheel cover discs, rings, or the like, for ornamenting, protecting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall built-up of several main parts
The semi-hollow pneumatic tire has an axis of revolution and comprises a sole mountable on the periphery of a rotary support, a tread opposite the sole, and two sidewalls each connecting the sole and the tread so as to form together a cover which defines an uninflated chamber inside the pneumatic tire. The tread has a concave profile according to a plane passing through the axis of revolution, and the pneumatic tire comprises two annular ridges which extend, respectively, the two sidewalls in the outer radial direction and which are connected to two opposite ends of the tread, the two annular ridges defining, respectively, two principal directions which intersect at an acute angle so that, when the pneumatic tire comes into contact with soil, by being subjected to a vertical load, the two annular ridges move closer together locally.
Pneumatic tire 1 for an agricultural machine, having an axis of revolution XX and comprising a tread 7, a sole 11 situated opposite the tread 7, and two sidewalls 13, 15 connecting the tread 7 to the sole 11. The tread 7, the sole 11 and the two sidewalls 13, 15 together form a casing 17 defining a chamber 19 inside the pneumatic tire 1. At least one of the sidewalls 13, 15 comprises, in this order and in succession in a direction oriented radially from the axis of revolution XX to the outside, a proximal portion 131, an intermediate portion 133 and a distal portion 135. In the unloaded state, the intermediate portion 133 projects into the chamber 19 in a direction substantially parallel to the axis of revolution XX.
A ground shaping machine, particularly an agricultural machine, including a frame, at least one roller fitted with a flexible tire, a first bearing and a second bearing whereby the roller can rotate about a substantially horizontal axis in the working position, the first bearing and the second bearing being positioned one at each end of the roller. The frame has a first support and a second support, the first support at least being connected to the first bearing through a suspension device including a mechanism with an upper arm and a lower arm, both substantially horizontal and perpendicular to the axis of rotation of the roller, each of the upper and lower arms being connected by a joint to the first support, and to the first bearing, the mechanism forming a deformable quadrilateral, while the suspension device also have a substantially vertical resilient return member connected by a joint to the first support and to the first bearing.
A01B 61/04 - Devices for, or parts of, agricultural machines or implements for preventing overstrain of the connection between tools and carrier beam or frame
A01B 29/06 - Rollers with special additional arrangements
A01B 29/04 - Rollers with non-smooth surface formed of rotatably- mounted rings or discs or with projections or ribs on the roller bodyLand packers
A01B 73/00 - Means or arrangements to facilitate transportation of agricultural machines or implements, e.g. folding frames to reduce overall width
24.
Agricultural machine with associated wheel and roller enabling furrow creation
An agricultural machine having a first frame and a roller with a tube mounted about a first axis. A second frame is connected to the first frame and a wheel, which includes a rim mounted about a second axis. The wheel has a tire and the roller has a covering around the tube. The covering and the tire tread have moldings defining a pattern element repeated in a transverse direction parallel to the first axis and to the second axis, respectively. The pitch of transverse repeat of the pattern element of the roller and the pitch of transverse repeat of the pattern element of the wheel are equal to the nearest 10%. The pattern elements define ribs the height of which on the roller and the height of which on the wheel are equal to the nearest 90%.
A pneumatic tire of the semi-hollow type includes a casing having an uninflated inner volume and including an inner wall provided with a retaining bead and a convex outer wall forming the tread of the tire, the inner wall and the outer wall of the tire being connected by two annular borders. The inner wall of the tire is concave so as to surmount a convex outer wall of the peripheral seat of a rim of a wheel, this outer wall being provided with a peripheral slot adapted to accommodate the retaining bead of the tire.
A roller assembly for agricultural machinery is disclosed. The roller assembly includes at least one tube onto which tires are threaded, and two arms adapted to support the tube in rotation at both its ends. Each arm carries a suspension lever housed inside the tube and acted upon by a resilient recoil member. The suspension lever is mounted on the arm so as to be pivotable about a first rotation axis and supporting a shaft end which carries a flange fixed to the inside of the tube for the rotation of this tube about a second rotation axis parallel to the first rotation axis. The roller assembly applies particularly to the rollers of seed drills.
A pneumatic tyre of the semi-hollow type includes a casing having an uninflated inner volume and including an inner wall provided with a retaining bead and a convex outer wall forming the tread of the tyre, the inner wall and the outer wall of the tyre being connected by two annular borders. The inner wall of the tyre is concave so as to surmount a convex outer wall of the peripheral seat of a rim of a wheel, this outer wall being provided with a peripheral slot adapted to accommodate the retaining bead of the tyre.
B60B 21/02 - Rims characterised by transverse section
28.
Roller with semi-hollow pneumatic tyres for agricultural machinery, notably a roller that can be combined with a seed drill or a ground preparation tool
This roller (10) comprises a tubular support structure (14) of horizontal axis (X-X) adapted to be rotatably mounted on a tractor-drawn support frame. A series of semi-hollow tyres with a dome-shaped profile are threaded onto this tubular support structure and enable a series of parallel furrows to be formed in the earth. The tubular support structure (14) comprises a framework formed by a plurality of bars (30) joined together by two circular end cheeks (32) between which these bars extend axially. The tyres (12) are mounted on the bars of the framework, forming with the latter an assembly that is connected for rotation and translation.
Un rouleau agricole 1 comprend un support tubulaire 3 et une série de pneumatiques 5 montée sur le support 3. Chaque pneumatique 5 de la série présente une enveloppe respective 15 non gonflée. Le rouleau comprend en outre une série de bandages 11, montée sur le support 3 de manière intercalée dans la série de pneumatiques 5. Chaque bandage 11 présente une enveloppe respective 17. Les bandages 11 sont plus petits que les pneumatiques 5 tandis que leur enveloppe 17 est plus étroite.
Une roue de ré-appui comprend un corps rigide (3) et un pneumatique semi-creux (5). Le pneumatique (5) comprend une enveloppe souple (50) avec une portion formant semelle (51) par l'intermédiaire de laquelle le pneumatique (5) est monté sur le corps rigide (3), une portion formant bande de roulement (53) et une paire de flancs (55) reliant chacun la semelle (51) à la bande de roulement (53). Les flancs (55) s'étendent, en partie au moins, selon un profil généralement concave, vu depuis l'extérieur du pneumatique (5).
The machine comprises a given number of roller pairs respectively connected to the machine frame by a linking part (32). The linking part (32) of each roller pair is adapted so as to enable the rollers (12a, 12b) to incline freely about a first roll axis (YY ) perpendicular to and coplanar with the longitudinal axis (XX ) of the rollers and about a second axis (HH ) parallel to the pitch axis of the frame (10), no matter what deformations of the road or terrain are encountered. Application in particular to seed drills for agricultural machines.
This tire (14) is a semi-hollow tire for farm machinery, specifically for a machine comprising a roller equipped with a series of tires mounted on a horizontal tube (12). Each tire includes a central sheath (26) and at least one dome-shaped tread part comprising a tread (24) connected to the sheath (26) by two walls (28, 30) so as to define a hollow annular cavity (32) with a reduced transverse section relative to the transverse section of the dome-shaped part. In addition, it includes a plurality of peripheral studs (34) protruding from the tread (24) and distributed in a circumferential direction at the peak of the dome-shaped part. In a variation, the tire may equip a single wheel.
This roller (10) comprises a tubular support structure (14) with a horizontal axis (X-X) apt to be mounted to rotate on a towed support frame. A series of dome-shaped, semi-hollow tires (12) are loaded onto this tubular structure and enable the soil to be formed into a series of parallel furrows. The tubular support structure (14) includes a framework formed of a plurality of bars (30) connected together by two circular end plates (32) between which these bars extend axially. The tires (12) are mounted on the bars of the framework forming a set secured in rotation and in translation with the latter.
The invention concerns a roller set for farm machines, including at least one tube (14) around which tires (16) are mounted, as well as two arms (32) capable of supporting the tube (14) in rotation at its two extremities. Each arm (32) bears a suspension lever (40) housed in the tube (14) and called upon by an elastic recall element (48), the suspension lever (40) mounted to pivot on the arm (32) around a first rotation axis (XX) and supporting a shaft end (64; 96) bearing a flange (66; 108) secured inside the tube (14) for the rotation of this tube around a second axis of rotation (YY) parallel to the first rotation axis (XX). The invention specifically applies to seeder rollers.
The invention relates to an agricultural machine comprising a first frame and at least one roller 4. The roller 4 comprises at least one tube rotatably mounted around a first axis XX on main bearings connected to the first frame. The agricultural machine further comprises a second frame, connected to the first frame, and at least one wheel 5. The wheel comprises at least one rim rotatably mounted around a second axis YY on main bearings connected to the second frame. The wheel 5 is provided with at least one tire 51 threaded on the rim. The roller 4 has a bandage 42 around the tube. The tire 51 of the wheel 5 has a tread 52. The bandage 42 and the tread 52 are provided with sculptures 43, 53, defining an elementary pattern 44, 54, repeated in a transverse direction parallel to the first axis XX, respectively to the second axis YY. The transverse repetition pitch L P4 of the elementary pattern 44 of the roller 4, and the transverse repetition pitch L P5 of the elementary pattern 54 of the wheel 5 are equal to nearly 10%. The elementary patterns 44, 54 define ribs 45, 55 of which the height L H4 on the roller 4 and the height L H5 on the wheel 5 are equal to nearly 90%, such that the repetition and the height of the ribs 45, 55 form in the earth 10 a series of grooves 11 that are substantially parallel and equidistant.
An agricultural machine tool (1) comprises a wheel body (3) which includes a hub, a rim (121) and at least two arms (75) which each connect the hub and the rim (121) to each other. At least one aperture (78) is provided between the two arms (75) and the rim (121) and has a closed contour (28). The tool (1) comprises a component which forms an accessory (2) having a profiled portion (23) having a shape which generally corresponds to the closed contour (28), and a generally superficial portion (21) which terminates the profiled portion (23). The profiled portion (23) is introduced at one side of the wheel body (3) into the aperture (78) closing the aperture by means of form-fitting cooperation. A set of fixing members (24) ensures the retention of the component (2) in a final position, in which the superficial portion (21) moves into a flush state with the arms (75), at least in the region of the contour (28).
Wheel assembly (1) for working the fields that is simpler to manufacture, including a wheel body (2) and a pair of flanges (5, 7) and a spacer (101) secured together by a securing means (9) and an envelope (3), comprising two side walls (35, 37), a tread (31) connecting the side walls (35, 37) to one another and an opening (43) opposite the tread (31). The envelope (3) comprises lips (39, 41) protruding from the side walls (35, 37) according to a direction toward the outside of the envelope (3). Each of the flanges (5, 7) comprises a cavity (51, 71) forming a groove on the periphery of the flange (5, 7). Part of the spacer (101) is arranged in the opening (43). The lips (39, 41) are arranged to fit in the cavity (51, 71) in such a way as to block the side walls (35, 37) against the spacer (101) in the vicinity of the opening (43).
An agricultural furrowing tool comprises a generally cylindrical support (201) and a plurality of tires (1). Each tire (1) comprises a sole (3) through which the tire (1) is mounted on the support (201), a tread (5) opposite the sole (3) and two sidewalls (11, 13) connecting the tread (5) to the sole (3). The sole (3), the tread (5) and the sidewalls (11, 13) together form a deformable envelope (6). The tread (5) of at least one of the plurality of tires (1) presents a generally convex shape. The sidewalls (11, 13) of these tires (1) are generally inclined radially. The convex shape of the tread (5) and the inclination of the sidewalls (11, 13) are such that the deformation of the envelope (6) draws the sole (5) axially outward.
A tire (1) for a furrow press roller comprises a sole (3) through which the tire (1) is mounted on a field roller support (2), a tread (5) opposite to the sole (3), and two sidewalls (7, 9) connecting the tread (5) to the sole (3). The sole (3), the tread (5) and the sidewalls (7, 9) together delimit a non-inflatable chamber (11). The tread (3) comprises at least one crest (51) and two shoulders (53, 55) each connecting the crest (51) to a respective sidewall (7, 9). The chamber (11) extends partially at least laterally under the shoulders (53, 55) and radially in the crest (51).
Un outil agricole (1) comprend un corps de roue (3) avec une gorge périphérique (35), un pneumatique (5) avec un talon (53) faisant saillie radialement vers l'intérieur et un verrou radial bloquant le pneumatique (5) autour du corps de roue (3). Le talon (53) est conformé de manière à se loger dans la gorge (35) au montage du pneumatique (5) autour du corps de roue (3). Le verrou radial comprend un premier orifice (37) ménagé dans le corps de roue (3) débouchant d'une part dans la gorge (35) et d'autre part dans une face principale (31 ; 33) du corps de roue (3), au moins un second orifice (67) ménagé dans le talon (53) du pneumatique (5) et ouvert sensiblement en regard du premier orifice (37), et une goupille (7) disposée dans le premier orifice (37) et le second orifice (67).
The invention relates to a pneumatic element for an agricultural tool comprising a non-inflated tire with a capacity to deform to promote the separation of the earth. However, increasing the capacity of the tire to deform is not sufficient to achieve a functional agricultural tool. The tire must be rigid enough to work the ground and the pneumatic elements must be resistant to shocks and the efforts exerted on them. This invention solves these problems by proposing an agricultural tool element comprising an uninflated tire with a tread and a pair of sidewalls each connected to the tread. The element comprises a rigid base through which the tire is mounted on a rotary support. The sidewalls are each overmolded on a peripheral portion of the rigid base. The base thus has the rigidity and strength required to withstand the forces and shocks that occur when the tool works.
Abrégé Roue racleuse pour semoir Une roue agricole (1) forme un accessoire d'un disque de semoir. Cette roue (1) comprend un corps (3) comprenant une jante (7) d'allure généralement de révolution autour d'un axe central (5) et un bandage (9) de type semi-creux comprenant une enveloppe souple autour d'une chambre creuse (13). Cette enveloppe souple comprend un fourreau (15) et une bande de roulement (19). Cette bande de roulement (19) présente un profil bombé vers l'extérieur du bandage (9). La jante (7) comprend une section axiale conformée en un siège (29), propre à recevoir le bandage (9), et une section axiale conformée en un outil (31), propre à racler le disque de semoir. L'enveloppe comporte un premier flanc (23), proche de la section d'outil (31), reliant le fourreau (15) à la bande de roulement (19). Ce flanc (23) s'étend généralement de manière radiale ou faiblement inclinée radialement. La jante (7) comprend une section axiale intermédiaire (38) qui raccorde la section d'outil (31) à la section de siège (29). Cette section intermédiaire (38) est conformée en une butée axiale (39) pour le bandage (9) en correspondance de forme avec le premier flanc (23). Le bandage (9) est monté sur la section de siège (29) par l'intermédiaire du fourreau (15) dans un état axialement contraint qui maintient le premier flanc (23) en contact contre la butée (39). Date Reçue/Date Received 2020-12-07
Un outil agricole (1) comprend un corps de roue (3) et un bandage souple (5) avec une chambre creuse (25) et une surface interne (51) autour de cette chambre creuse (25), une ouverture circulaire sur la chambre (25) et une paire de talons (35, 37) bordant cette ouverture. Une entretoise (56) au moins partiellement tubulaire avec deux faces d'extrémités axialement opposées. Au moins sur une partie correspondant à l'un au moins des talons (35, 37), la surface interne (51) s'étend de manière généralement tronconique, en s'évasant radialement vers l'extérieur du bandage souple (5), et l'une au moins des faces d'extrémité de l'entretoise présente au moins une surface saillante axialement. L'entretoise (56) est placée en travers de l'ouverture du bandage (5) de manière telle que la surface saillante (63) engage la surface interne (51) dans une zone de ladite partie correspondant au talon (35,37).
A semi-hollow tire (14) includes an envelope with an inner non-inflated volume and including an inner wall (42) equipped with a retaining heel (52) and a convex outer wall (44) forming the tread of the tire, the inner wall (42) and the outer wall (44) of the tire being linked by two annular borders (46, 48). The inner wall (42) of the tire (14) is concave so as to cap a convex-shaped outer wall (34a, 34b) of the peripheral seat (22) of a wheel rim (12), this outer wall featuring a peripheral slit (36) designed to receive the retaining heel (52) of the tire. Application specifically to roller feelers and/or soil-packing wheels for agricultural machines.
The invention concerns a soil modelling machine, specifically an agricultural machine, including a chassis (3), at least one roller (11) equipped with a flexible bandage (13), a first (37) and a second (37) rotation bearing for the roller (11) around an axis (XX), essentially horizontal in a work position, the first bearing (37) and the second bearing (37) located at each of the extremities of the roller (11). The chassis (3) includes a first support (7) and a second support (9), the first support (7) at least linked to the first bearing (37) using means of suspension, including a mechanism with an upper arm (101) and a lower arm (121) essentially horizontal and perpendicular to the (XX) rotation axis of the roller (4), each of the upper (101) and lower (121) arms linked by a joint (103, 105, 123, 125) on the one hand to the first support (7) and on the other to the first bearing (37), the mechanism forming a deformable quadrilateral, as well as an essentially vertical elastic recall element (141) linked by a joint (143, 145) on the one hand to the first support (7) and on the other, to the first bearing (37).
The tire (1) for an agricultural machine has an axis of XX revolution, comprising a tread (7), such that a sole (11) is situated opposite the tread (7) and two sidewalls (13,15) connect the tread (7) to the sole (11). The tread (7), sole (11) and two sidewalls (13, 15) together form a casing (17) that defines a chamber (19) inside the tire (1). At least one of the sidewalls (13, 15) has a proximal portion (131), an intermediate portion (133) and a distal portion (135) in this order and in a direction oriented radially from the axis of XX revolution to the outside. The intermediate portion (133) projects into the chamber (19) in a direction substantially parallel to the axis of XX revolution in the unloaded state.
The semi-hollow tire (10) has a rotation axis and comprises a tread (20) suitable for mounting on the rim of a rotational support (12), a tread (24) opposite the tread (20) and two flanks (26) each connecting to the treads to form a casing (28) defining an uninflated chamber (30) inside the tire. The tread (24) has a concave profile according to a plane that goes through the rotation axis, and the tire includes two annular ridges (34) that respectively extend the two flanks (26) in the exterior radial direction. These flanks are respectively connected to two opposite ends (32) of the tread (24), the two annular ridges (34) respectively defining two main directions (D) cut at an acute angle so that when the tire comes into contact with a surface while being exposed to a vertical load, the two annular ridges (34) approach each other locally, exerting a pinching effect on the ground, causing an increase in the concavity of the tread (24) and an increase in the angle (A). Applies to agricultural seeders, among other things.
A tool (1) for field work comprises a first flange (7) and a second flange (9) which are mounted on one another forming a wheel body (3). The first flange (7) comprises a central portion (71), a peripheral portion (73) of generally annular shape, and at least one arm (75) connecting the central portion (71) and the peripheral portion (73) to each other. The second flange (9) is homologous to the peripheral portion (73) of the first flange (7). In the assembled state, the wheel body (3) has a rim (121) formed jointly by the peripheral portion (73) of the first flange (7) and the second flange (9), and a hub formed by the central portion (71) of the first flange (7).
A tool (1) for field work comprises a first flange (7) and a second flange (9) which are mounted on one another forming a wheel body (3). The first flange (7) comprises a central portion (71), a peripheral portion (73) of generally annular shape, and arms (75) connecting the central portion (71) and the peripheral portion (73) to each other. The second flange (9) is homologous to the first flange (7). In the assembled state, the wheel body (3) has a rim (121) formed jointly by the peripheral portion (73) of the first flange (7) and homologous peripheral portion (63) of the second flange (9), and a hub formed by the central portion (71) of the first flange (7). The central portion (61) of the second flange (9) receives the hub formed by the central portion (71) of the first flange (7).
