• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Agricultural implement comprising a tire (5) including a tread (53), two sidewalls (55, 56) and a sole (51). The tire (5) further comprises an intermediate portion (54) arranged between the tread (53) and the sole (51) for defining, together with the tread (53) and the two sidewalls (55, 56). , an envelope around a chamber (65). The intermediate portion (54) has a recessed structure configured so that the intermediate portion (54) sags more than the envelope while maintaining a bulk width less than or equal to that of the envelope.
    公开号:FR3024637A1
    申请号:FR1457670
    申请日:2014-08-07
    公开日:2016-02-12
    发明作者:Olivier Phely；Denis Piou
    申请人:Otico SAS；
    IPC主号:
    专利说明:

    [0001] The invention relates to the field of agricultural machines, in particular agricultural tools provided with at least one tire.
    [0002] Among the agricultural machines, there are seeders comprising various tools working one after the other: a head member, typically a share, a disc or a tooth, is arranged to first open a groove in the ground; then a deposition member is arranged to bring a seed or seed to the bottom of the furrow; finally, one or more tail wheels close the groove and / or tamp the earth. Some seed drills further include an agricultural tool such as a sealing wheel to support and / or bury the seed at the bottom of the furrow. This sealing wheel intervenes between the seed deposition member and the tail wheels closing the groove. Known sealing wheels generally have a high aspect ratio width to be able to roll on the bottom of the furrow. Given their height-to-width ratio, the sealing wheels are particularly sensitive to the phenomenon of buckling. The tire of the sealing wheel tends to bend laterally. This causes, on the one hand, the degradation of the grooves and, on the other hand, the rapid wear of the tire. In addition, the compression force applied at the bottom of the groove makes the section of the tire particularly unstable. Finally, in use, the sealing tools are particularly sensitive to any irregularities or stones in the grooves.
    [0003] The Claimant has set itself the goal of improving the situation. It proposes an agricultural tool of the type comprising a tire including a part of the tread type, two sidewalls and a sole-type part through which the tire is mounted on a wheel body. The tire further comprises an intermediate portion arranged between the tread and the sole to delimit, together with the tread and the two sides, a casing 3024637 2 around a chamber. The intermediate portion has a recessed structure configured so that the intermediate portion sags more than the envelope while maintaining a bulk width less than or equal to that of the envelope.
    [0004] Such a tool makes it possible to transmit the force necessary to support the seeds in the ground while presenting a significant damping able to collect the possible irregularities of the ground during the rolling. The risk of occurrence of buckling is limited and the operating behavior of the tire is stabilized. In use, the tire preserves the shape of the grooves. The furrows are little, or not, degraded. The dynamic behavior of such tires is better controlled, which makes it possible to slow down their wear and increase their service life. At high working speeds, for example at about 17 kilometers per hour, the transmission of shocks from the tire to the remainder of the drill is limited. Vibration and fatigue of the machine are reduced.
    [0005] 15 Pressing the seeds in the earth means, here, either to bury them at shallow depths or to push them lightly, without covering them with soil, to fix them there. The pressing force and the burial depth are adapted according to the agronomic characteristics of the crops used.
    [0006] The tool may have the following optional features, alone or in combination with each other: The overall width of the tire casing is less than 50 millimeters. In this case, the tire can come to support the seeds at the bottom of the finest furrows obtained with existing seeders. The overall width may even be less than 35 or 30 millimeters. The spacer comprises a substantially annular intermediate wall and extending between the tread and the sole. The intermediate wall connects the two sides to each other and delimits, together with the tread and the two sides, the envelope around the chamber. In this case, the intermediate wall 3024637 3 keeps both sides preventing them from moving away from each other. The tire does not spread, or little, in operation. The width of the tire is preserved. - The two sides each comprise an inner portion and an outer portion. The outer part 5 delimits part of the envelope. The inner part belongs to the intermediate part and connects the envelope to the sole extending in the extension of the respective outer part. The sole, the inner portion of each of the two sides and a portion of the envelope jointly define an annular space of the recessed structure. The profile of such a tire is then substantially constant on the circumference. Its manufacture is facilitated. In addition, the outer surface of each sidewall can be made continuous. The insertion of earth and debris in use is prevented. Soil contamination of the tire is reduced. The inner part of each of the two sides has a configuration arranged to bend towards the annular space under the effect of a load during operation. The deformation of the tire in its circumference is substantially continuous during travel. The homogeneity of the pressure exerted by the tool on the seeds is improved. The spacer includes spoke-shaped links each connecting the sole to the envelope. The deformation of the intermediate part is then ensured by links rather than walls. The links are more independent of each other. Thus, if the tire rolls over an obstacle such as a pebble, the active link over the pebble will close the shock almost alone. The operation of the adjacent portions of the tire is little or not impacted. The links are distributed in the circumference of the tire and spaced apart from each other. Two adjacent links, the sole and a portion of the envelope together form a perforated space of the recessed structure. The recessed structures make it possible to lighten the tire and to make it more manoeuvrable, particularly on uneven terrain. Each of the links has a configuration arranged to bend towards a perforated space of the tire under the effect of a load during operation. The initiation of the bending movement of the link is then better controlled, particularly when the tire encounters a severe obstacle such as a pebble or a clod of soil.
    [0007] According to another aspect of the invention, the Applicant proposes a drill equipped with an agricultural implement as described above and for which the tire is mounted on a wheel body.
    [0008] Other characteristics, details and advantages of the invention will appear on reading the following detailed description and the attached drawings, in which: FIG. 1 shows a perspective view of a tool according to a first embodiment FIG. 2 shows a side view of the tool of FIG. 1; FIG. 3 shows a sectional view along the double-segment III-III of FIG. 1; FIG. 4 shows a view similar to FIG. 3 in which only a portion of the tire is shown; FIG. 5 shows a section of the tire of the tool of FIG. 1; FIG. 6 shows a perspective view of FIG. a tool according to a second embodiment of the invention, only the tire being shown, - Figure 7 shows a side view of the tire of Figure 6, - Figure 8 shows a perspective view of a section of the tire. of Figure 6, - Figure 9 shows a sectional view according to the segment IX-IX of FIG. 7, and FIG. 10 shows a general view of a seed drill equipped with a tool according to the invention. The drawings and the description below contain, for the most part, elements of a certain character. They can therefore not only serve to better understand the present invention but also contribute to its definition, if any. It is pointed out that elements such as tire geometry are difficult to define completely, other than by drawing.
    [0009] Figures 1 to 5 show a first embodiment. They show a tool 1 working in the field in the form of a wheel. The wheel comprises a wheel body 3 around which a tire 5 is mounted.
    [0010] In the example described here, the wheel body 3 comprises two flanges 31, 32 assembled with each other. The two flanges 31, 32 are substantially symmetrical to one another with respect to their junction plane. In the mounted state one on the other, the two flanges 31, 32 of the wheel body 3 house a bearing block 33 known as such. The assembly of the two flanges 31, 32 and the bearing block 33 defines a revolution axis XX of the wheel body 3. The axis XX substantially corresponds to the axis of rotation of the wheel in operation. The bearing block 33 has a substantially cylindrical bore open at each of its ends for mounting the wheel body 3 around a wheel shaft.
    [0011] As shown in FIG. 3, the wheel body 3, in the mounted state, has an overall width LR, or maximum width. In the example described here, the central portion of the wheel body 3 housing the bearing block 33 corresponds to the widest part of the wheel body 3.
    [0012] At the periphery of the wheel body 3, the two flanges 31, 32 define between them a groove 35. The groove 35 extends substantially on the circumference of the wheel body 3. It is shaped to receive the tire 5. In the As described herein, the conformation of the groove 35 is adapted to secure a bead 61 of the tire 5. The radial ends of the flanges 31, 32 are folded towards each other so as to form bead retention hooks 61. In this configuration, the disassembly of the tire 5 is effected by separating the two flanges 31, 32 from one another. In the mounted state, the clearance, that is to say the accidental separation of the tire 5 and the wheel body 3 is prevented.
    [0013] In variants, other tire attachment systems around the wheel body 3 may be used. For example, the wheel body 3 may have a substantially cylindrical peripheral surface and the tire 5 may be forcibly mounted.
    [0014] Alternatively, the wheel body 3 can be made in one piece or by assembling more than two parts. The flanges 31, 32 are, for example, made from metal or plastic materials, depending on the intended use conditions. The tire 5 comprises a sole-type portion 51, a part of the tread type 53 and two sidewalls 55, 56.
    [0015] The tire 5 is mounted on the wheel body 3 via the sole 51. The sole 51 has a substantially annular shape extending along the circumference of the tire 5. The sole 51 has a radial section, as shown in Figure 5, substantially constant on the circumference. In a radial direction, the sole 51 forms an inner part of the tire 5. When mounted on the wheel body 3, the sole 51 forms the part of the tire 5 closest to the axis XX. In the example described here, the sole 51 comprises, on the inner side, the heel 61. In the state housed in the groove 35 of the wheel body 3, the heel 61 is invisible from the outside. The sole 51 further comprises an outer portion held around the wheel body 3 in the mounted state. The outer portion and the heel 61 of the sole 51 are mutually delimited by two substantially annular grooves in each side face. The two grooves cooperate with the retaining hooks of the flanges 31, 32 to attach the tire 5 to the wheel body 3.
    [0016] In operation, the sole 51 is substantially fixed with respect to the wheel body 3. In operation, the sole 51 is substantially indeformable in comparison with the other parts of the tire 5 described hereinafter.
    [0017] The tread 53 has a substantially annular shape extending circumferentially of the tire 5. In a state of rest, the sole 51 and the tread 53 are substantially concentric and centered on the axis XX. The tread 53 substantially surrounds the tread 51. The tread 53 has a radial cross section, as shown in FIG. 5, substantially constant circumferentially. In a radial direction, the tread 53 forms an outer part of the tire 5. Viewed along a radial section of the tire 5 as shown in FIG. 5, the tread 53 is substantially opposite the sole 51. In the state mounted on the wheel body 3, the tread 53 forms the part of the tire 5 furthest from the axis XX. In the example described here, the tread 53 carries an outer peripheral surface. The outer peripheral surface is intended to come into contact with the ground during driving. In the case of using the tool 1 as a filling wheel for burying seeds, the outer peripheral surface of the tread 53 is intended to roll against the bottom of a groove to support it. seeds.
    [0018] In the example described here, the tread 53 has a substantially constant thickness. The tread 53 has a substantially convex radial profile and rounded outwardly. In variants, the shapes and dimensions of the tread 53 are adapted according to the type of seeds and the properties of the floors worked.
    [0019] The flanks 55 and 56 are substantially symmetrical to one another along a median plane of the tire 5 perpendicular to the axis XX. The tire 5 comprises an intermediate part 54. The intermediate part 54 25 comprises an intermediate wall 63. The intermediate wall 63 has a substantially annular shape extending along the circumference of the tire 5. In a state at rest, the intermediate wall 63 is substantially concentric with the sole 51, with the tread 53 and centered on the axis XX. The intermediate wall 63 extends substantially between the tread 53 and the sole 51. The intermediate wall 63 has a radial section, as shown in Figure 5, substantially constant over the circumference.
    [0020] In the embodiment of Figures 1 to 5, each of the sidewalls 55 and 56 extends from the sole 51 to the tread 53. Each of the sidewalls 55 and 56 includes an outer portion 57, respectively 58, and a internal portion 59, respectively 60. The outer portion 57, 58 and the inner portion 59, 60 extend respectively in the extension of one another. The intermediate wall 63 connects the flanks 55, 56 to each other at the connection of the outer portion 57, 58 with the corresponding inner portion 59, 60 of each of the sidewalls 55, 56. The intermediate wall 63 thus forms a part Inner tire 5, invisible from the outside. Viewed from the outside and in a rest state of the tire 5, the outer surfaces of both sides 55, 56 are substantially continuous between the outer portion 57, 58 and the respective inner portion 59, 60. In the figures, a dashed line represents the delimitation between the two parts of each sidewall 55, 56 and the position of the intermediate wall 63.
    [0021] The outer portions 57 and 58 of the sidewalls 55 and 56, the tread 53 and the intermediate wall 63 together define a casing around a chamber 65. The chamber 65 forms a substantially annular hollow space within the tire 5 and located in the radially outer half of the section of the tire 5.
    [0022] In the example described here, the chamber 65 is uninflated. The chamber 65 is in fluid communication with the external environment. Due to this lack of voluntary tightness, a moderate deformation of the envelope facilitates the separation of the earth that could adhere to the outer surfaces. Deformation can be generated during running or stopping during equipment maintenance operations. In the example shown in FIG. 5, the fluidic communication is enabled by an orifice 69. The orifice 69 passes through the intermediate wall 63 and opens on the one hand into the chamber 65 and on the other hand into an annular space 67 subsequently described. . The orifice 69 used during the vulcanization can therefore remain. The orifice 69 constitutes an exception to the circumferential homogeneity of the tire 5.
    [0023] The intermediate portion 54 comprises, in addition to the intermediate wall 63, the inner portions 59 and 60 of the sidewalls 55 and 56. The inner portions 59 and 60 of the sidewalls 55 and 56 connect the intermediate wall 63 to the sole 51. The intermediate wall 63, the inner portions 59 and 60 of the sidewalls 55 and 56 and the sole 51 together define an additional envelope 5 around the annular space 67. The annular space 67 forms a hollow space inside the tire 5, located in the radially inner half of the section of the tire 5. The intermediate portion 54 thus has a recessed structure. In the example described here, the annular space 67 is uninflated. The annular space 67 is in fluid communication with the external environment. Due to this lack of voluntary sealing, the deformation of the intermediate portion 54 is facilitated. In the example shown in FIG. 5, the fluidic communication is enabled by an orifice 71. The orifice 71 passes through the soleplate 51 and opens on the one hand into the annular space 67 and on the other hand into an interspace between the two flanges 31, 32 of the wheel body 15 3. The orifice 71 used during vulcanization, such as the orifice 69, may therefore remain. The orifice 71 is also an exception to the circumferential homogeneity of the tire 5. The chamber 65 is here in fluid communication with the outside via the annular space 67.
    [0024] In the example of the first embodiment shown in FIGS. 1 to 5, in the idle state, the tire 5 has: an inside diameter D of between 50 and 160 millimeters, for example approximately 132 millimeters, outer diameter D between 250 and 350 millimeters, for example approximately 300 millimeters, - a width in width Lp of between 25 and 40 millimeters, for example approximately 31 millimeters, - a tread 53 of thickness e53 between 4 and 10 millimeters, for example about 8 millimeters, - a sole 51, of thickness e51 between 10 and 14 millimeters, for example about 12 millimeters, without heel 61, 3024637 10 - an intermediate wall 63 of thickness e63 between 6 and 12 millimeters, for example about 8 millimeters, - flanks 55, 56 of thickness e55, e56 of between 3 and 7 millimeters, for example about 5 millimeters, and 5 - a section of height H between 70 and 100 millimeters, for example about 85 millimeters, including heel 61. The overall width LR of the wheel body 3 is here between 40 and 50 millimeters, for example about 44 millimeters. The orifices 69 and 71 have a substantially cylindrical bore with a diameter of between 2 and 4 millimeters, for example about 3 millimeters. The thicknesses are shown in the figures. Connection areas between the different parts of the tire 5 make it possible to avoid sudden variations in thickness and possible concentrations of stresses that might result therefrom. The tire 5 of the first embodiment is here produced by assembling two separately extruded parts. The two separately extruded parts are then vulcanized together. In cross-sectional views, a dashed line represents the joining surface of the two parts, substantially in the middle of the intermediate wall 63. In a variant, the tire 5 is obtained after coextrusion of the entire profile. In addition, the two parts are here made of two different materials. The production of a bi-material tire can be implemented, for example, by two distinct extrusions followed by a common vulcanization or by a bi-material co-extrusion. In the finished state, the tire 5 is in one piece. In the example described here, the radially inner portion, corresponding to the intermediate portion 54 and the sole 51, is made from a rubber having a Shore A hardness of between 55 and 70, for example about 63 Shore. The radially outer portion, corresponding to the outer casing, is made from a rubber of Shore hardness between 35 and 50, for example about 43 Shore. Realizing 3024637 11 the outer envelope and the intermediate portion 54 in two separate materials can further refine their respective dynamic behavior. Whether carried out with one or more extrusions, the tire may alternatively be made of a single material. The dimensional values and Shore hardness data given above are particularly adapted to the dynamic behavior desired by the Applicant in the intended application. These values may be adapted individually or jointly depending on the intended applications. The combination of structures and material properties allows to precisely select the desired deformations according to the applications. For example, the hardness of the material of the spacer portion 54 may be less than or substantially equal to the hardness of the radially outer portion. The hardness is one parameter among others such as shape, structure and dimensions, to impart to the tire the expected slump behavior. In addition, other elastomers may be used, for example polyurethanes. Reference is now made to the second embodiment shown in FIGS. 6 to 9. The elements similar to those of the first embodiment bear identical numerical references. The second embodiment differs from the first embodiment in that the intermediate portion 54 is devoid of internal portions 59 and 60 of the sidewalls 55 and 56. The intermediate portion 54 is flank-free. The intermediate portion 54 comprises, in addition to an intermediate wall 63, links 81 in the form of spokes.
    [0025] Each of the links 81 connects the sole 51 to the outer shell. Each of the links 81 extends between a surface oriented towards the axis XX of the intermediate wall 63 and a surface facing the sole 51.
    [0026] The links 81 constitute exceptions to the circumferential homogeneity of the tire 5. In other words, the shape of the section of the tire 5 depends on the angular position considered. The links 81 are distributed in the circumference of the tire 5. The links 81 are spaced apart from each other. Two adjacent links 81 define between them a perforated space 83. The perforated space 83 is further delimited by an angular portion of the sole 51 and an angular portion of the intermediate wall 63. The intermediate portion 54 thus has, as in the first embodiment 5, a recessed structure. In the second embodiment, the recessed structure takes the form of perforated spaces 83 opening on one and the other of the two main faces of the tire 5. By principal faces, it is intended to define the two planes parallel to each other, perpendicular to the axis XX, spaced apart from one another by the overall width Lp and which delimit the gauge of the tire 5.
    [0027] As can be seen in FIG. 7, when the tire 5 is at rest, the links 81 extend substantially in a plane perpendicular to the axis XX, that is to say substantially between the two aforementioned main faces. Unlike spokes in the conventional sense, the orientation of each link 81 forms a non-zero angle with radial directions of the tire 5. In the example described here, the links 81 are fifteen in number. The adjacent links 81 are equidistant from each other. Thus, the homogeneity of the rolling behavior is improved. Geometrically, each link 81 is the result of a planar rotation of another link 81 about the axis XX. Each link 81 has a slightly curved shape, oriented along the main plane of the tire XX and curved in the same direction about the axis XX as the other links 81. Together, the links 81 have a general configuration in spiral or partial helix . In the example described here, the tire 5 is provided for rolling clockwise as shown in FIG. 7. The tire 5 then has a recommended mounting direction. In any event and from a functional point of view, the links 81 of the second embodiment are the analogs of the inner portions 59 and 60 of the sidewalls 55 and 56 of the first embodiment and the perforated spaces 83 of the second embodiment. are the analogues of the annular space 67 of the first embodiment.
    [0028] In the example of the second embodiment shown in FIGS. 6 to 9, in the idle state, the tire 5 has: an inside diameter D of between 50 and 160 millimeters, for example approximately 120 millimeters, an outside diameter D between 250 and 350 millimeters, for example approximately 300 millimeters, a width in width Lp of between 25 and 40 millimeters, for example approximately 30 millimeters, a tread 53 of thickness e53 between 4 and 8 millimeters, for example about 6 millimeters, and of width L53 between 12 and 20 millimeters, for example about 17 millimeters, - an outer envelope of height E between 30 and 40 millimeters, for example about 35 millimeters, - an intermediate wall 63 of thickness e63 substantially equal to that of the tread 53, - sides 55, 56 of thickness e55, e56 of between 4 and 8 millimeters, for example about 5 milliamps; meters, and a section of height H between 80 and 100 millimeters, for example about 90 millimeters, excluding heel 61.
    [0029] The overall width LR of the not shown wheel body 3 of the second embodiment is substantially equivalent to that of the first embodiment. The orifice 69, similar to that of the first embodiment but not visible in the figures, has a substantially cylindrical bore with a diameter of between 2 and 4 millimeters, for example about 3 millimeters. The thicknesses are shown in the figures. Connection areas between the different parts of the tire 5 make it possible to avoid sudden variations in thickness and possible concentrations of stresses that could result therefrom.
    [0030] The tire 5 of the second embodiment is here produced by molding and vulcanizing a single piece. The tire 5 is made of a single material, for example a rubber of Shore A hardness between 35 and 50, for example about 43 Shore. Alternatively, the tire 5 is made of several materials and / or assembly of several parts. In the finished state, the tire 5 is in one piece. In the example described here, the links 81 have a solid section. The dimensional values and Shore hardness data given above are particularly adapted to the dynamic behavior desired by the Applicant in the intended application. These values may be adapted individually or jointly depending on the intended applications. The combination of structures and material properties allows to precisely select the desired deformations according to the applications. The dynamic behavior, in operation, of the agricultural tools according to one or other of the two embodiments described above is now described. In operation, during the rolling of the tire 5 on the ground, the dynamic behavior of the outer envelope around the chamber 65 and the dynamic behavior of the intermediate portion 54 are distinguishable from each other. In the first embodiment, the intermediate portion 54 is formed by the inner portions 59 and 60 of the sidewalls 55 and 56 and the intermediate wall 63, while in the second embodiment the intermediate portion 54 is formed by the links 81. and the intermediate wall 63. The outer casing has a limited deformation during contact of the tread 53 on the ground, for example at the bottom of the groove. Thus, the shape of the tread 53 is preserved in order to effectively support the seeds at the bottom of the groove. In comparison, the angular portion of the intermediate portion 54 located between the axis XX of rotation and the ground has a significant subsidence. By collapse means here the deformation in a radial direction. The intermediate portion 54 then forms a zone 30 of deformation and damping in the radial direction of the tire 5. During rolling, unevenness in the ground can cause abrupt variations in stresses experienced by the tire 5 in the substantially vertical direction. The recessed configuration of the intermediate portion 54 allows the variations to be accommodated at least in part by a controlled deformation of the intermediate portion 54. The outer envelope and the tread 53 continue to provide the burial function of seed.
    [0031] The Applicant has found that a footprint width of less than 50 millimeters allowed work on the bottom of most grooves formed by current machines. A width of less than 35 millimeters or 30 millimeters makes it possible to work in more specific grooves for certain crops by working on a restricted contact surface, which makes it possible to generate a greater pressing force and / or deeper penetration into the grooves. the bottom of the furrow. The slump of the intermediate portion 54 is greater than the sagging of the outer shell. This is made possible by the recessed configuration of the tire. The tire has a preferred slump zone. When a compressive force is applied between the tread and the sole of the tire, part of the material constituting the intermediate part 54 occupies the free space of said intermediate part 54. In the first embodiment, the internal portions 59 and 60 of the sidewalls 55 and 56 occupy part of the annular space 67. In the second embodiment, the connections 81 partially occupy the perforated spaces 83. The recessed structure allows, in addition, to guide In particular, the deformed portions remain in a restricted width. In particular, the intermediate wall 63 holds the two flanks 55, 56 close to each other. It avoids their mutual distance. An expansion in width is thus avoided. When the collapse occurs in a groove, the risk of scraping and degrading the sidewalls of the groove is reduced. The overall width of the intermediate portion 54 remains less than the size of the outer casing of the tire, including during controlled collapse.
    [0032] In other words, the recessed structure makes it possible at the same time to favor the subsidence of the intermediate portion 54 rather than the slump of the outer envelope, and at the same time to prevent said sagging from causing the widening of the tire 5.
    [0033] In the tires used until now, it was common for an imbalance to appear between one side and the other of the tire. The tire then adopted a buckling behavior. In a pictorial fashion, the section of the tires flexed on one side in the form of a banana. This led to degrade the furrows in which the tires evolved. The recessed structure of the tire shown in the figures makes it possible, on the contrary, to improve the symmetry of the dynamic behavior. By guiding the deformation of the flanks 55, 56 towards the median plane of the tire 5 or by guiding the deformation of the links 81 in the main plane of the tire 5, the risk of occurrence of an imbalance between one side and the other of the tire 5 is reduced. The risk of buckling of the tire 5 is also reduced.
    [0034] In the second embodiment, the slightly curved shape of the links 81 imposes the direction of bending under the effect of compression. In particular, the links 81 flex in the main plane of the tire 5, that is to say in a direction perpendicular to the axis XX. They all bow in the same direction without interfering with each other. The sole 51 and the tread 53 are not very deformable in comparison with the intermediate part 54. The localized splaying of the intermediate part 54 allows a mutual approximation of the sole 51 and the tread 53. This subsidence takes place in the angular portion of the tire 5 closest to the ground and subjected to the weight of the tool 1. Consequently, the generally annular shape of the sole 51 is off-center with respect to the deformed annular shape of the tread 53 during the rolling. Under the effect of sagging, the axis of rotation XX goes down to the ground. Sagging improves the mobility of the tread 53 relative to the axis XX while limiting its own deformation.
    [0035] FIG. 10 schematically represents a drill 100 and the organization of the tools equipping it. The arrow A represents the advancement direction of the seed drill 100 on the ground surface 201. The seed drill 100 is equipped with a head member 101, carrying wheels 103, a seed deposition member 105 and the seed deposit 205. a tool 1 according to the invention, here in the form of a sealing wheel. The head member 101 comprises, here, two disks 107. The two disks 107 are arranged in a "V" profile and are arranged to first open a groove in the ground 201. The dashed line 202 represents the bottom of the groove formed by the head member 101.
    [0036] The carrying wheels 103 support at least in part the weight of the drill 101 on either side of the groove. The carrier wheels 103 further form gauging wheels to adjust the depth of the groove. The carrying wheels 103 are free in rotation but integral discs 107 in a substantially vertical direction. Thus, even in the presence of unevenness in a field, the discs 107 work at a substantially constant depth with respect to the surface of the ground 201. The depositing member 105 is arranged to bring the seeds 205 to the bottom 202 of the furrow, behind the head member 101.
    [0037] The tool 1 in the form of a sealing wheel comes to drive the seeds 205 into the bottom 202 of the groove. In variants, one or more tail wheels close the groove and / or tamp behind the tool 1 (left of Fig. 10). The invention is not limited to the examples of agricultural tools described above, only by way of example, but it encompasses all the variants that may be considered by those skilled in the art within the scope of the claims below. 30
    权利要求:
    Claims (9)
    [0001]
    REVENDICATIONS1. Agricultural tool (1) of the type comprising a tire (5) including a part of the tread type (53), two sidewalls (55, 56) and a sole-like part (51) through which the tire (5) is mounted on a wheel body (3), characterized in that the tire (5) further comprises an intermediate portion (54) arranged between the tread (53) and the sole (51) to delimit, together with the tread (53) and the two sidewalls (55, 56), a casing around a chamber (65), and that the intermediate portion (54) has a recessed structure configured so that the intermediate portion (54) sinks more than the envelope while maintaining a bulk width less than or equal to that of the envelope.
    [0002]
    2. Agricultural implement (1) according to one of the preceding claims, wherein the overall width of the tire envelope (5) is less than 50 millimeters.
    [0003]
    3. Agricultural implement (1) according to one of the preceding claims, wherein the intermediate portion (54) comprises a substantially annular intermediate wall (63) and extending between the tread (53) and the sole (51). ), said intermediate wall (63) connecting the two flanks (55, 56) to each other and delimiting, in conjunction with the tread (53) and both sides (55, 56), the envelope around of the room (65). 25
    [0004]
    4. Agricultural implement (1) according to one of the preceding claims, wherein the two flanks (55, 56) each comprise an inner portion (59; 60) and an outer portion (57; 58), the outer portion (57; 58) delimiting in part the envelope, the inner part (59; 60) belonging to the intermediate part (54) and connecting the envelope to the sole (51) extending in the extension of the outer part ( 57, 58), the sole (51), the inner portion (59; 60) of each of the two sidewalls (55, 56) and a portion of the casing together defining an annular space (67) of the structure. recessed.
    [0005]
    The agricultural implement (1) according to claim 4, wherein the inner portion (59; 60) of each of the two sidewalls (55,56) has a configuration arranged to flex toward the annular space (67) under the effect a charge during operation.
    [0006]
    6. agricultural implement (1) according to one of claims 1 to 3, wherein the intermediate portion (54) comprises links (81) in the form of spokes each connecting the sole (51) to the casing.
    [0007]
    The agricultural implement (1) according to claim 6, wherein the links (81) are distributed in the circumference of the tire (5) and spaced from one another, two adjacent links (81), the sole (51) and a portion of the envelope jointly forming a perforated space (83) of the recessed structure.
    [0008]
    8. agricultural tool (1) according to one of claims 6 and 7, wherein each of the links (81) has a configuration arranged to bend to a perforated space (83) 20 of the tire (5) under the effect of a charge during operation.
    [0009]
    9. Seeder comprising at least one agricultural implement (1) according to one of the preceding claims and wherein the tire (5) is mounted on a wheel body (3).
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    EP3017669B2|2020-11-18|Improved agricultural wheel
    EP2904890A1|2015-08-12|Wheel forming an improved agricultural tool
    EP2269431B1|2017-05-03|Roller with semi-hollow tyres, in particular for farming machines
    FR2776239A1|1999-09-24|Special tires mounted on tube to form roller creating furrows for seed drill
    EP3695698A1|2020-08-19|Improved press wheel and tyre for said wheel
    EP3834594A1|2021-06-16|Scraping gauge wheel for seeder
    FR2938726A1|2010-05-28|Disk assembly for roller of agricultural machine, has stiffeners formed on annular sides to increase stiffness of solid band in direction parallel to axis of tube and to confer flexibility in direction perpendicular to axis of tube
    EP3636057A1|2020-04-15|Tyre for agricultural roller
    同族专利:
    公开号 | 公开日
    EP2982229A1|2016-02-10|
    FR3024637B1|2017-02-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3029857A|1961-05-03|1962-04-17|Mieczyslaw G Bekker|Multiple concentric chamber tire|
    FR2776239A1|1998-03-18|1999-09-24|Otico|Special tires mounted on tube to form roller creating furrows for seed drill|
    DE102004007601A1|2004-02-17|2005-09-01|Schwarz, Günter|Tire has annular reinforcing wires embedded in its flanks which are permanently attached to wheel rim, annular spring reinforcement being mounted below tread|
    EP2145775A1|2008-07-18|2010-01-20|Otico|Semi-hollow tyre and associated wheel rim, in particular for farming machines|
    DE102016102673A1|2016-02-16|2017-08-31|Horsch Maschinen Gmbh|Saatgutandruckrolle|
    DE102018112852A1|2018-05-29|2019-12-05|Arnold Jäger Holding GmbH|Wheel, in particular for agricultural machines, and method for producing a wheel|
    SE544221C2|2018-11-30|2022-03-08|Vaederstad Holding Ab|Pressure wheels for agricultural implements, row unit comprising such pressure wheels, agricultural implements and procedure for adjusting the hardness of pressure wheels|
    FR3092471B1|2019-02-13|2021-12-17|Otico|Improved and pneumatic sealing wheel for this wheel|
    DE102020105443A1|2020-03-02|2021-09-02|Amazonen-Werke H. Dreyer SE & Co. KG|Pressure roller for an agricultural implement|
    法律状态:
    2015-08-10| PLFP| Fee payment|Year of fee payment: 2 |
    2016-02-12| PLSC| Search report ready|Effective date: 20160212 |
    2016-08-02| PLFP| Fee payment|Year of fee payment: 3 |
    2017-08-23| PLFP| Fee payment|Year of fee payment: 4 |
    2018-08-24| PLFP| Fee payment|Year of fee payment: 5 |
    2019-08-27| PLFP| Fee payment|Year of fee payment: 6 |
    2020-08-27| PLFP| Fee payment|Year of fee payment: 7 |
    2021-08-30| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1457670A|FR3024637B1|2014-08-07|2014-08-07|IMPROVED PNEUMATIC AGRICULTURAL TOOL|FR1457670A| FR3024637B1|2014-08-07|2014-08-07|IMPROVED PNEUMATIC AGRICULTURAL TOOL|
    EP15180073.7A| EP2982229A1|2014-08-07|2015-08-06|Agricultural tool with improved pneumatics|
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