• 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:
    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) has 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) one to the 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).
    公开号:FR3017265A1
    申请号:FR1451000
    申请日:2014-02-10
    公开日:2015-08-14
    发明作者:Olivier Phely
    申请人:Otico SAS；
    IPC主号:
    专利说明:

    [0001] The invention relates to agricultural tools, and more particularly those mainly comprising one or more wheels.
    [0002] In tools of this type, the wheel or wheels are generally used for working the ground. The wheels can operate alone, or in cooperation with other parts of the tool. In the case of a drill, for example, the tool comprises a portion arranged to open a furrow in the ground, typically a share, a disc or a tooth, and one or more wheels to close the groove and / or to tamp the earth, after the seeds have been deposited at the bottom of the furrow. Some tools, such as the aforementioned drill, also include so-called "gauge" wheels, which adjust the working depth of the rest of the tool. In the case of a tool comprising a share, for example, gage wheels are mounted integrally with the share, so that rolling on the ground, the wheels maintain the active part of the share at a substantially constant depth. Most often, the wheels that equip agricultural tools are intended to roll on the ground. They then include a tire mounted around a portion of the wheel which forms the body thereof. To prevent the tire from becoming detached from the wheel body during work, the part of the wheel body which forms the rim is shaped in a particular manner. This results in generally complex shapes, which complicate the manufacture of the wheel body, and also the mounting of the tire on it. Therefore, the wheels often include two similar flanges that mount to one another to form the body of the wheel. The flanges are assembled to one another via one of their main faces, while gripping the tire.
    [0003] In FR 2 933 903, the Applicant has proposed an innovative wheel, the shape of the wheel body prevents the tire from de-in-use, including in extreme conditions. The body in question is formed by the mutual assembly of two similar flanges face to face.
    [0004] When used as tools, the wheels are generally subjected to significant efforts in operation. In some cases, especially when a seed drill, the orientation of the wheel in the machine does not correspond to the direction of advance of the latter: it often happens that the wheel is inclined significantly compared to the direction in advance. In addition, the wheel can be inclined relative to the vertical ground. This results, in operation, very important constraints on the wheel body.
    [0005] To ensure that the wheel resists these constraints, it is conventional to provide a fairly massive wheel body. This results in a large wheel mass, which is undesirable. A large mass increases manufacturing costs and routing, and complicates the mounting of the wheel on the machine, especially the cantilever mountings.
    [0006] The plaintiff has set itself the goal of improving the situation. It proposes a working tool comprising a first flange and a second flange which are mounted on one another forming a wheel body. The first flange comprises a central portion, a peripheral portion of generally annular shape, and at least one arm connecting the central portion and the peripheral portion to one another. The second flange is homologous to the peripheral portion of the first flange. In the mounted state, the wheel body has a rim formed jointly by the peripheral portion of the first flange and the second flange and a hub formed by the central portion of the first flange. In the proposed tool, the mounting and dismounting of the tire is facilitated because of the particular configuration of the wheel body. That has a mechanical strength at least equal to the conventional wheels, at least sufficient for field work. The manufacture of the wheel body requires much less raw material. The proposed tool has reduced manufacturing times and costs.
    [0007] The tool may have the following optional features, alone or in combination with each other. - The first flange and the second flange are made of two different materials. Thus, the mechanical properties of each of the materials are better adapted to the particular functions of each of the two flanges. - The second flange is metal. The second flange generally having a volume of material lower than that of the first flange, the increase in mass compared to a second plastic flange remains low. The first flange is made of plastic material and the second flange is made of plastic material. The mass of the wheel body is then small relative to a wheel body comprising at least one metal flange. The second flange is formed of at least two parts in general shapes of ring sections. The size of the installations for the manufacture of the second flange, for example the molds, may be of reduced size. The second flange occupies a small space before assembly. This facilitates the transport. 25 - Each of the first flange and the second flange supports a tire slipped on the rim. The force supported by the wheel body due to the tightening of the tire is then better distributed. The stress concentrations and the risks of rupture are reduced. - In the state mounted on one another of the two flanges, the hub of the first flange exceeds at least in part in an interior space defined by the annular shape of the second flange. Balancing of the wheel body as a whole mounted on an axle is then improved. In particular, this balancing can be adjusted according to the constraints in operation. The peripheral portion of the first flange and the second flange each have an outer surface whose diameter in the vicinity of the interface between the first flange and the second flange in the mounted state is different from the diameter of the opposite side to the interface. between the first flange and the second flange, so that the rim has a seat of generally concave or convex shape adapted to receive a tire. The tire is held axially by the seat itself. The risk of accidental ejection is then reduced. The peripheral portion of the first flange and the second flange are mutually shaped so that their assembly defines a groove extending substantially on the circumference of the wheel body at the interface of the peripheral portion of the first flange and the second flange. The groove is adapted to house a bead of a tire. The tire is then held in a radial direction in the groove. The risk of accidental ejection is reduced. - The first flange is monobloc and the second flange is monobloc. The manufacture of one and / or the other can be achieved by a single molding operation. The risk of rupture of one of the two flanges in operation is reduced. 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 the invention; FIG. 2 shows a view of the tool of FIG. 1 from another point of view; FIG. 3 shows a view from one face of the tool of FIG. 1; FIG. FIG. 5 shows a view similar to FIG. 2, in which the wheel body is depicted without a tire, FIG. 6 shows an exploded and perspective view of the wheel body. FIG. 7 shows an exploded perspective view of a tool according to the invention, FIG. 8 shows a cross-sectional view of the tool of FIG. 7 on which the tool is shown devoid of 9 shows an exploded perspective view of a tool according to the invention, the FIG. 10 shows a sectional view of the tool of FIG. 9 on which the tool is shown devoid of a tire; FIG. 11 shows an exploded perspective view of a tool according to the invention on which the tool is The tool is shown without tire, - Figure 12 shows a sectional view of the tool of Figure 11, - Figure 13 shows a view similar to Figure 2 of the tool of Figure 11, and 10 - the Figures 14A to 14D show an agricultural machine on which are mounted two tools according to the invention. The drawings and the description below contain, for the most part, elements of a certain character. They will thus be able not only to serve to better understand the present invention, but also to contribute to its definition, if necessary. Figures 1 to 4 show a working tool in the field in the form of a wheel 1. The wheel 1 comprises a wheel body 3 around which is mounted a tire 5. Figures 5 and 6 show the wheel body 3 of the embodiment of FIGS. 1 to 4 before the tire 5 is mounted therein. In the remainder of the description, the term wheel body ("body" or "wheel body" in English) the substantially indeformable part of the wheel, as opposed to the deformable part that constitutes the tire. The term rim ("rim" or "wheel rim" 25 in English) the part located at the periphery of the wheel body and intended to support the tire. The rest of the wheel body can be called a wheel disc ("disc", "wheel dish", "dish" or "wheel dish" in English), ie the wheel center consists of the rim and the sail. Here, the term rim can not denote the entirety of the wheel body, unlike the abusive use that can be made commonly.
    [0008] The wheel body 3 is formed of a first flange 7 and a second flange 9 generally circular. The first flange 7 and the second flange 9, shown separately in Figure 6, are mounted on one another to form the wheel body 3 as shown in Figure 5.
    [0009] The first flange 7 and the second flange 9 each have a central axis, or axis of revolution. These central axes are merged in the assembled state and coincide with the axis of rotation of the wheel 1 in operation. These axes are referenced XX in the figures.
    [0010] The first flange 7 and the second flange 9 each have an inner face, respectively 77 and 97, and an opposite outer face, respectively 79 and 99. When assembling the first flange 7 and the second flange 9 one on the on the other hand, the internal faces 77 and 97 are facing each other. The outer faces 79 and 99 are oriented opposite each other, towards the outside of the wheel body 3.
    [0011] The first flange 7 and the second flange 9 are fixed, here reversibly, to each other to form the wheel body 3 by means of fasteners. In the example described here, the fasteners comprise screw-nut torques 13. The screw-nut torques 13 make it possible to hold together the first flange 7 and the second flange 9. Here, the screw-nut torques 13 are distributed along the periphery wheel body. Alternatively or in addition, other fastening means may be used, for example, clips or rivets. The first flange 7 has a central portion 71, a peripheral portion 73 and at least one arm 75 connecting the central portion 71 to the peripheral portion 73. Here, the first flange 7 comprises three arms 75. The central portion 71 has a shape general of revolution. In the assembled state, the central portion 71 forms the hub of the wheel 1. The central space of the revolution form of the central portion 71 is adapted to receive an axle or a rocket for supporting the free wheel 1 rotation along the axis of rotation XX. The wheel 1 comprises a rotary bearing housed in the central portion 71, here in the form of a ball bearing 11. Alternatively, the ball bearing 11 can be replaced by other types of bearings, and more generally by a bearing of different type, such as a plain bearing for example.
    [0012] The central portion 71 has an inner surface 81, generally oriented towards the main axis XX and forming, here, a bore adapted to house the bearing 11. The central portion 71 has an outer surface 83, peripheral, opposite to the inner surface 81 .
    [0013] The peripheral portion 73 is of generally annular shape. The peripheral portion 73 is delimited, in the direction of the main axis XX, by an inner edge and an outer edge. The peripheral portion 73 and the central portion 71 are substantially concentric and centered on the main axis XX. The peripheral portion 73 surrounds the central portion 71. In the example shown in Figure 4, the peripheral portion 73 and the central portion 71 are offset relative to each other in the direction of the main axis XX. On the side of the inner face 77 (on the left in FIG. 4), the central portion 71 protrudes with respect to the inner edge of the peripheral portion 73 in the direction of the main axis XX, almost all along the length of the part. central 71. On the side of the outer face 79 (right in Figure 4), the central portion 71 is recessed relative to the outer edge of the peripheral portion 73. The outer end of the central portion 71 is almost aligned with the inner edge of the peripheral portion 73. Alternatively, the peripheral portion 73 and the central portion 71 may be substantially coplanar in a plane perpendicular to the main axis XX.
    [0014] The peripheral portion 73 has an inner surface 91, or diametrically inner, generally oriented towards the central portion 71 and an outer surface 93, or diametrically outer and peripheral, opposite to the inner surface 91. Here, the inner surface 91 has a general shape cylindrical interrupted by the arms 75. Here, the outer surface 93 has a generally annular shape, of rounded profile and curved outwardly.
    [0015] Each arm 75 has an inner end 101 connected to the central portion 71 at its outer surface 83, and an outer end 103, opposite to the inner end 101 and connected to the peripheral portion 73 at its inner surface 91. then the central portion 71 and the peripheral portion 73 to each other. The arms 75 extend radially. They form radii of the wheel 1. Here, the inner end 101 of each of the arms 75 is connected to the outer surface 83 substantially along the entire length of the central portion 71 in the direction of the main axis XX. The arms 75 have a thickness, in the direction of the main axis XX, which decreases slightly and then increases steadily from the central portion 71 to the outer end 103, where it is maximum and substantially equal to the thickness of the peripheral portion 73. Thus, the outer end 103 of each arm 75 merges substantially with the peripheral portion 73 to which it is connected. The central portion 71 protrudes from the plane defined by the inner edge of the peripheral portion 73.
    [0016] The portion of the inner face 77 of the first flange 7 defined by the arms 75 has a generally frustoconical shape connecting the inner ends of the central portion 71 and the peripheral portion 73. The portion of the outer face 79 of the first flange 7 defined by the arms 75 is substantially concave, cup-shaped centered on the main axis XX. The outer end of the central portion 71 projects slightly into the bottom of the bowl shape. Spaces 78 are defined between the arms 75 and the inner surface 91 of the peripheral portion 73. The distribution of the arms 75 around the central portion 71 defines as many interspaces 78. These spaces 78 are free and through in the direction of the main axis XX, from the inner face 77 to the outer face 79. In operation, the spaces 78 facilitate the evacuation of debris and sludge through the first flange 7. The arms 75 and the interspaces 78 together form a open wheel sail.
    [0017] The arms 75 are regularly distributed angularly about the main axis XX. In the examples described here, they are three in number and spaced 120 ° from each other. This configuration makes it possible to ensure sufficient mechanical strength for the envisaged applications while at the same time allowing material savings with respect to a solid web of wheel. In variants, the number and / or the distribution of the arms 75 may be different.
    [0018] In the examples described here, the first flange 7 is shaped as a single piece. The first flange 7 is obtained, for example, by injection molding. The first flange 7 is here, of plastic material, for example polyamide such as polyamide 6-6, or polypropylene. The first plastic flange 7 has low raw material and manufacturing costs. Nevertheless, the first flange 7 can also be made of metal. The first flange 7 made of metal then has an improved resistance to shocks, for example in the event of projections of stones during the rolling of the machine. As shown in Figures 2 to 6, the first flange 7 may take the form of a consolidated envelope by internal reinforcing walls, or ribs, between which multiple cavities are left empty. The ribs give the first flange 7 good mechanical strength, comparable to a metal part and / or a solid plastic part. They provide the necessary mechanical strength with little raw material. The volume occupied by the first flange 7 is largely hollow. If necessary, the number, distribution and shape of the ribs can be adapted according to the desired strength of the first flange 7. Finite element type modeling tools can be used. The central portion 71 houses the bearing 11. When mounted, the bearing 11 is mounted coaxially with the main axis XX of the wheel body 3. The bearing 11 is held in this position thanks to the housing so that the main axis XX of the wheel body 3 coincides with the axis of rotation of the wheel 1 in use. In the example described here, the inner surface 81 of the central portion 71 of the first flange 7 takes the form of a through bore along the main axis XX. The bore is, here, consisting of a succession, in the direction of the main axis XX, of three substantially cylindrical and concentric portions. The central portion has a small diameter while the inner portion and the outer portion each have a large diameter. The two large diameters are, here, equal. The central portion is connected to each of the inner portion and the outer portion by a respective annular shoulder, respectively oriented towards the inner side and the outer side of the first flange 7. The bearing 11 has a shape that corresponds to the inner surface 81 The bearing 11 is formed of an assembly of at least two parts. When installing the bearing 11 in the inner surface 81, each of the two parts is inserted respectively from the inner side and from the outer side of the inner surface 81 to bear respectively on each of the annular shoulders. Once the two parts assembled to one another, the two shoulders form axial stops and oppose the exit of the bearing 11 of the housing. The second flange 9 is homologous to the peripheral portion 73 of the first flange 7. The second flange 9 has a generally annular shape. The second flange 9 is devoid of arms and central hub portion. The second flange 9 has an inner surface 111 homologous to the inner surface 91 of the first flange 7, generally oriented towards the axis of rotation XX and an outer surface 113 homologous to the outer surface 93 of the first flange 7, opposite to the inner surface 111. The inner surface 111 of the second flange 9 and the inner surface 91 of the first flange 7 function in a similar manner.
    [0019] In the example shown in the figures, the second flange 9 takes the form of a ring of solid section and generally triangular. One of the sides of the triangle shape carries the outer surface 113 homologous to the outer surface 93 of the peripheral portion 73 of the first flange 7. The outer surface 113 has a generally annular shape, of rounded profile and bulging outwardly .
    [0020] During the assembly of the two flanges 7, 9 one on the other, the spaces 78 of the first flange 7 are opposite the free internal space of the annular shape of the second flange 9. The spaces 78 therefore remain through . The wheel body 3 has an open wheel web.
    [0021] In the examples described here, the second flange 9 is formed of a single piece. The second flange 9 is obtained by molding. The second flange 9 takes the form of a flange or peripheral rim. Alternatively, the second flange 9 may be obtained by stamping or stamping from a sheet. The second flange 9 is here metal, for example steel. Alternatively, aluminum may be used. The second flange 9 has a high mechanical strength. Nevertheless, the second flange 9 may also be made of a plastic material, for example similar to that of the first flange 7.
    [0022] The first plastic flange 7 has a low manufacturing cost while the second flange 9 of metal gives the wheel body 3 the mechanical strength required for field work. Nevertheless, the two flanges 7, 9 may both be made of metal, for example when the mechanical stresses provided are severe, or both plastic, for example when the mechanical stresses provided are modest. The general configuration of the wheel body 3 formed by the first flange 7 and the second flange 9 makes it possible to adapt the mechanical behavior of the wheel body 3 by adapting the materials used without altering the general configuration of the wheel body 3. In a variant, the first flange 7 and / or the second flange 9 may be made by assembling several pieces rather than a single piece. For example, the peripheral portion 73 of the first flange 7 and / or the second flange 9 may be formed of several ring sections. Once the two flanges 7, 9 mutually assembled, 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 homologous to the peripheral portion 73. The rim 121 then has a surface external joint formed by the outer surface 93 of the peripheral portion 73 of the first flange 7 and the outer surface 113 homologous to the second flange 9. This outer rim surface forms a seat 201 of the wheel body 3. The seat 201 accommodates the tire 5. Once the tire 5 is threaded onto the rim 121, the first flange 7 and the second flange 9 support the tire 5, here each substantially for half. The area of the outer surface 93 of the first flange 7 covered by the tire 5 is substantially equivalent to the area of the homologous outer surface of the second flange 9 covered by the tire 5. The first flange 7, the second flange 9 and the 5 are mutually configured so that the radial force applied by the tire 5 encircling the wheel body 3 is substantially equally distributed over the two flanges 7, 9. None of the first flange 7 and the second flange 9 has for a single function the locking of the tire 5 according to the direction of the main axis XX. Alternatively, the distribution of forces can be unbalanced, for example up to a ratio of 4 to 1. The tire 5 comprises a sole 131 resting on the seat 201 of the rim 121. The configurations of the sole 131 of a part, and the seat 201 on the other hand, are selected concordant, substantially in shape correspondence. The tire 5 is held around the wheel body 3. The risk of accidental ejection is low, even in difficult conditions. In the examples described here, the tire 5 is a tire of the semi-hollow type. The tire 5 is of the non-inflatable type. The interior space between the sole 131 and the tread is in fluid communication with the outside, by an opening 25 not shown. This allows a greater deformation of the tire 5 in operation, thus facilitating the take-off of the sludge. In the embodiments shown in the figures, the seat 201 has a diameter that varies along the direction of the main axis XX. The seat 201 has a non-strictly cylindrical shape. In the vicinity of the interface between the first flange 7 and the second flange 9, that is to say in the vicinity of the inner faces 77, 97, the diameter of the seat 201 is substantially different from the diameter of the seat 201 in the vicinity of the faces opposite, that is to say the outer faces 79, 99. This is visible in Figures 4, 8, 10 and 12 in section. Portions of the seat 201 thus oppose the axial displacement of the tire 5. The risk of accidental ejection is particularly low. The addition of a specific piece forming a locking cheek is superfluous.
    [0023] On the embodiments of FIGS. 1 to 6 and, 11 and 12, in the vicinity of the interface between the first flange 7 and the second flange 9, the diameter of the seat 201 is greater than the diameter of the seat 201 in the vicinity of the opposite faces. flanges 7, 9, with the exception of a groove 161. The seat 201 then has a generally convex shape.
    [0024] This configuration allows, for example, the use of tires whose sole 131 is concave and cap a convex seat 201 by partially surrounding it. Such tires are for example described in FR 2 933 903. As a variant, in the vicinity of the interface between the first flange 7 and the second flange 9, the diameter of the seat 201 is smaller than the diameter of the seat 201 in the vicinity of the faces. opposed. The seat 201 then has a generally concave shape. The seat 201 has surfaces opposing the axial displacement of the tire 5. In the exemplary embodiments of FIGS. 7 to 10, the peripheral portion 73 of the first flange 7 and the second flange 9 are mutually shaped so that their assembly defines the groove 161. The groove 161 extends substantially around the circumference of the wheel body 3, at the interface of the peripheral portion 73 of the first flange 7 and the second flange 9. The groove 161 is adapted to house a corresponding bead 53 of the tire 5. The maintenance of the tire 5 around the wheel body 3 is further improved. In each of the embodiments shown in the figures, the wheel body 3 is asymmetrical. In particular, the hub formed by the central portion 71 of the first flange 7 is offset relative to the middle of the wheel body 3 along the main axis XX. The hub of the first flange 7 at least partially extends into the interior space defined by the annular shape of the second flange 9, more or less depending on the embodiments. This feature is optional but allows a better balance of the tool 1 once installed on the rest of the machine. The tire 5 as shown in Figures 1 to 4 has an asymmetrical profile. The sole 131 and the seat 201 each have a plane of symmetry perpendicular to the main axis XX. The portion of the tire 5 opposite the sole 131, the tread, is asymmetrical. The tread has a lip 55. The lip 55 protrudes from the tire 5, substantially in the direction of the main axis XX, towards the outside, on the side of the outer face 99 of the second flange 9. The lip 55 10 extends substantially along the circumference of the tire 5. Such a wheel 1 provided with a lip tire 55 is provided for installation on a machine as diagrammatically shown in FIGS. 14A to 14D. The embodiments of FIGS. 7 to 13 are similar to that of FIGS. 1 to 6. The functionally identical parts carry the same reference numerals. In these embodiments, the bearing 11 comprises a double row of angular contact balls and is housed in a cartridge. The cartridge is generally cylindrical outer shape. The diameter of the bearing 11 is constant unlike the embodiment described above. The inner surface 81 of the central portion 71 of the first flange 7 takes the form of a through bore along the main axis XX of constant diameter along its length. On the right in FIGS. 8, 10 and 12 in section, the central portion 71 further comprises an axial stop 72 configured to limit the translation movement of the bearing 11. The axial stop 72 is here formed of the side of the outer face 79 of the first flange 7. Therefore, the insertion and extraction of the bearing 11 can be made on the opposite side. The axial stop 72 makes it possible to adjust the positioning of the bearing 11 relative to the first flange 7. The axial stop 72 can be seen as a bottom of the housing. On the left in FIGS. 8, 10 and 12 in section and in FIG. 13, the wheel 1 further comprises an insert 164, or cup. The insert 164 is shaped so as to be fixed to the wheel body 3 by enclosing the bearing 11 housed in the central portion 71 of the first flange 7. The insert 164 has, here, a general disc shape in which a central opening circular is spared. The insert 164 is here made by stamping a piece of sheet metal. In the installed state, the insert 164 partially covers the central portion 71. The insert 164 is fixed on the open side of the housing for the bearing 11, that is to say, here on the side of the inner face 77. The insert 164 is fixed with the screw-nut couples 13 disposed near the center of the wheel 1. Once fixed against the central portion 71, the insert 164 forms a housing cover and axial stop for the bearing 11 The bearing 11 is enclosed inside the housing. The opening in the center of the insert 164 allows the passage of an axle for mounting the wheel 1 on an agricultural machine. Disassembly of the insert 164 is sufficient to open the housing and release the bearing 11. In operation, the insert 164 ensures the axial maintenance of the bearing 11. The insert 164, at least partially covering the hub, protects it the environment. For example, the insert 164 protects the hub and the bearing 11 which is housed shocks from projections of pebbles in operation. The insert 164 also protects against stresses and friction that may result from the accumulation of dried earth near the moving parts of the wheel 1. The insert 164 forms a protective shield for the hub. FIGS. 14A to 14D partially represent a drill 500 in which tools 1 similar to those of FIGS. 1 to 12 each cooperate with a disk 501. The tool 1 then forms a gauge wheel. The tool 1 is free in rotation but secured to the disk 501 in a substantially vertical direction. Thus, even in the presence of unevenness in a field, the disk 501 works at a substantially constant depth with respect to the ground surface. In addition, the respective axes of the tool 1 and the disc 501 are offset relative to each other. During the advance of the drill 500, the lip 55 of the tool 1 scrapes against one of the faces of the disk 501, thereby cleaning the mud and debris that may be attached thereto. In this example of application of the tool 1, one of the two faces of the tool 1 is inaccessible in operation: the side of the tool 1 corresponding to the outer face 99 of the second flange 9 is not very accessible because of the presence of the disk 501.
    [0025] In the examples shown in the figures, the lip 55 of the tire 5 is situated on the side of the second flange 9. In this configuration, a large free space is formed inside the wheel 1 on the side of the lip 55. free space allows to accommodate, in part in the interior space defined by the tire 5, an arm 502 of an agricultural machine frame supporting an axle disposed substantially along the main axis XX. Figures 14A to 14D show an example of such an arrangement. In this example, the arm 502 of the frame must be able to extend between the main axis XX in the vicinity of the bearing 11 and the periphery of the wheel 1. The arm 502 of the frame must also not interfere with the operation of the disk 501 disposed in contact with a portion of the lip 55 and partially closing one face of the wheel 1. In variants, the lip 55 may be disposed on the same side of the wheel 1 as the first flange 7, facing the disk 501. As this appears in the front view of Figure 14B, that is to say oriented rearwardly in the direction of advance of the drill 500, the drill 500 has a configuration called "V". Two disks 501 cooperate to dig a furrow in the ground. The two disks 501 are symmetrical to each other with respect to a vertical plane extending in the direction of advance represented by the arrow A. The disks 501 are not arranged vertically but instead oriented in part towards the ground. They form for example an angle of about 5 ° with the vertical. A wheel 1 cooperates with each of the disks 501. The two wheels 1 have an orientation similar to that of the disks 501, although the value of the angle can be different. As shown in the top view of Fig. 14C, the seed drill 500 further has a "V-shaped" configuration in another orientation in space. The two discs 501 also form an angle with the forward direction of the drill 500. The angle is here about 5 ° also. The wheels 1 have an orientation similar to that of the disks 501, although the value of the angle may be different. Because of these particular orientations, the forces experienced by the wheels 1 and due to the resistance of the ground and friction are high. They are greater than those which would suffer an identical wheel 1 whose axis of rotation XX would be substantially perpendicular to the direction of advance and / or horizontal.
    [0026] The stresses tend to be concentrated at the hub and axle connection. The improvements provided by the invention are therefore of specific interest for agricultural tools with a similar configuration.
    [0027] A tool according to the invention has the necessary mechanical strength for field work while being realized by means of two flanges manufactured with less material than the wheel bodies with two existing flanges. By differentiating the functions of each flange, they have different structures from each other. From the raw material can be saved, depriving the second flange of arms and central part.
    [0028] The wheel body is purified and lightened. Transportation and manufacturing costs are reduced. The manufacture of at least one of the two flanges, the ring-shaped recessed at its center, is simplified and faster. Manufacturing costs are still reduced. In existing two-flange wheels, good cooperation between three elements is difficult to ensure. For example, the bearing had not only to be sized and maintained with respect to the first flange but also with respect to the second flange. In the invention, the bearing does not cooperate directly with the second flange. For example, the bearing housed in the hub can be removed from its housing, to be replaced maintenance, without the need to disassemble the two flanges and whatever the state of the second flange. Manufacturing tolerances can be increased.
    [0029] The invention is not limited to the examples of 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.
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. Tool (1) for field work of the type comprising 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 part (73) of the first flange (7), in the assembled state, the wheel body (3) has a rim (121) formed jointly by the peripheral part (73). the first flange (7) and the second flange (9) and a hub formed by the central portion (71) of the first flange (7).
    [0002]
    2. Tool (1) according to claim 1, wherein the first flange (7) and the second flange (9) are made of two different materials. 15
    [0003]
    3. Tool (1) according to one of the preceding claims, wherein the second flange (9) is metal.
    [0004]
    4. Tool (1) according to one of claims 1 and 2, wherein the first flange (7) 20 is of plastic material and the second flange (9) is of plastic material.
    [0005]
    5. Tool (1) according to one of the preceding claims, wherein the second flange (9) is formed of at least two parts in the general shape of ring sections. 25
    [0006]
    6. Tool (1) according to one of the preceding claims, wherein each of the first flange (7) and the second flange (9) carries a tire (5) threaded on the rim (121).
    [0007]
    7. Tool (1) according to one of the preceding claims, wherein, in the state mounted on one another, the hub of the first flange (7) protrudes at least partly in an interior space defined by the annular shape of the second flange (9).
    [0008]
    8. Tool (1) according to one of the preceding claims, wherein the peripheral portion (73) of the first flange (7) and the second flange (9) each have an outer surface (93; 113) whose diameter in the vicinity the interface between the first flange (7) and the second flange (9) in the assembled state is different from the diameter of the side opposite the interface between the first flange (7) and the second flange (9), so that the rim (121) has a seat (201) of generally concave or convex shape adapted to receive a tire (5).
    [0009]
    9. Tool (1) according to one of the preceding claims, wherein the peripheral portion (73) of the first flange (7) and the second flange (9) are mutually shaped so that their assembly defines a groove (161) s extending substantially circumferentially of the wheel body (3) at the interface of the peripheral portion (73) of the first flange (7) and the second flange (9), the groove (161) being adapted to house a bead ( 53) of a tire (5).
    [0010]
    10. Tool (1) according to one of the preceding claims, wherein the first flange (7) is monobloc and the second flange (9) is monobloc.
    类似技术:
    公开号 | 公开日 | 专利标题
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    同族专利:
    公开号 | 公开日
    SI2904889T1|2021-01-29|
    LT2904889T|2020-10-12|
    EP2904889B1|2020-07-08|
    FR3017265B1|2016-05-13|
    DK2904889T3|2020-09-28|
    AU2015200619A1|2015-08-27|
    RS60821B1|2020-10-30|
    US20150223389A1|2015-08-13|
    RU2015104276A|2016-08-27|
    AU2015200619B2|2018-12-20|
    RU2677547C2|2019-01-17|
    US10039226B2|2018-08-07|
    HUE052126T2|2021-04-28|
    UA121094C2|2020-04-10|
    ES2817895T3|2021-04-08|
    EP2904889A1|2015-08-12|
    CA2879633A1|2015-08-10|
    RU2015104276A3|2018-08-20|
    ZA201500958B|2017-09-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2731900A|1956-01-24|oehler |
    US921557A|1909-01-26|1909-05-11|Adjustable Planter Wheel Company|Adjustable wheel for corn-planters.|
    US1087816A|1911-12-05|1914-02-17|Edmund J Ogden|Traction-wheel for planters.|
    US5533793A|1995-03-17|1996-07-09|Gleason Corporation|Agricultural tires and wheel assemblies therefore|FR3103995A1|2019-12-09|2021-06-11|Otico|scraper wheel for seed drill|US1282305A|1916-04-03|1918-10-22|Simmons Wheel Company|Pressed-metal wheel.|
    US2152957A|1936-05-26|1939-04-04|Fred W Fortney|Wheel|
    US2848278A|1954-10-15|1958-08-19|Massey Ferguson Inc|Gauge wheel for agricultural implements|
    JPS6219136Y2|1981-12-17|1987-05-16|
    JPH0221866Y2|1982-06-26|1990-06-12|
    SU1318185A1|1986-02-06|1987-06-23|Научно-Производственное Объединение Механизации И Электрификации Сельского Хозяйства|Drill furrow roller|
    US4733730A|1986-06-05|1988-03-29|Deutz-Allis Corporation|Planter gauge wheel|
    US6295939B1|1998-04-06|2001-10-02|Ronald Emin Arthur Emms|Seed planter press-wheel assembly|
    RU2299547C2|2005-07-11|2007-05-27|Государственное научное учреждение Всероссийский научно-исследовательский институт агролесомелиорации|Working tool for embedding into soil of discontinuously sown seeds|
    FR2933903B1|2008-07-18|2010-08-27|Otico|SEMI-HOLLOW PNEUMATIC AND ASSOCIATED WHEEL RIM, IN PARTICULAR FOR AGRICULTURAL MACHINERY|EP3363653A1|2017-02-15|2018-08-22|Kverneland AS|Impeller in lightweight design for an agricultural machine and agricultural machine|
    US10618349B2|2017-07-13|2020-04-14|Hoosier Stamping & Manufacturing Corp.|Two piece rim and tire connected assembly|
    DE102018112852A1|2018-05-29|2019-12-05|Arnold Jäger Holding GmbH|Wheel, in particular for agricultural machines, and method for producing a wheel|
    法律状态:
    2015-02-11| PLFP| Fee payment|Year of fee payment: 2 |
    2016-02-12| PLFP| Fee payment|Year of fee payment: 3 |
    2017-02-17| PLFP| Fee payment|Year of fee payment: 4 |
    2018-02-23| PLFP| Fee payment|Year of fee payment: 5 |
    2020-02-26| PLFP| Fee payment|Year of fee payment: 7 |
    2021-02-26| PLFP| Fee payment|Year of fee payment: 8 |
    2022-02-25| PLFP| Fee payment|Year of fee payment: 9 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1451000A|FR3017265B1|2014-02-10|2014-02-10|WHEEL FORMING ENHANCED AGRICULTURAL TOOL|FR1451000A| FR3017265B1|2014-02-10|2014-02-10|WHEEL FORMING ENHANCED AGRICULTURAL TOOL|
    CA2879633A| CA2879633A1|2014-02-10|2015-01-22|Wheel forming an improved agricultural machine|
    ES15154269T| ES2817895T3|2014-02-10|2015-02-09|Wheel that is part of an improved agricultural tool|
    EP15154269.3A| EP2904889B1|2014-02-10|2015-02-09|Wheel forming an improved agricultural tool|
    HUE15154269A| HUE052126T2|2014-02-10|2015-02-09|Wheel forming an improved agricultural tool|
    AU2015200619A| AU2015200619B2|2014-02-10|2015-02-09|Wheel forming an improved agricultural tool|
    RS20201120A| RS60821B1|2014-02-10|2015-02-09|Wheel forming an improved agricultural tool|
    US14/617,086| US10039226B2|2014-02-10|2015-02-09|Wheel forming an improved agricultural tool|
    DK15154269.3T| DK2904889T3|2014-02-10|2015-02-09|Wheels that form an improved agricultural tool|
    LTEP15154269.3T| LT2904889T|2014-02-10|2015-02-09|Wheel forming an improved agricultural tool|
    SI201531388T| SI2904889T1|2014-02-10|2015-02-09|Wheel forming an improved agricultural tool|
    UAA201501042A| UA121094C2|2014-02-10|2015-02-10|WHEEL FORMING PERFECT AGRICULTURAL TOOLS|
    RU2015104276A| RU2677547C2|2014-02-10|2015-02-10|Wheels for improved agricultural implement|
    ZA2015/00958A| ZA201500958B|2014-02-10|2015-02-10|Wheel forming an agricultural tool|
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