• 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 knife attachment device (1) (8) on a mower-trimmer rotor (2) comprises a shackle (10) carrying the knife (8), an axis (18) having a geometric axis (19). according to which it can occupy an operational position relative to the shackle (10), in which the shaft (18) is engaged in one lug (20, 21) of the rotor (2) and the shackle (10) where it is immobilized according to the geometric axis (19), and axial immobilization means (25) of the axis (18) having a closed configuration, wherein the axis (18) is immobilized in its operative position relative to the shackle (10) , and having an open configuration, wherein the axis (18) is allowed to be moved relative to the shackle (10) along the geometric axis (19) so that the axis (18) leaves its operational position relative to the shackle (10). According to the invention, the axial immobilization means (25) is placed in its open configuration by the shackle (10) oriented non-radially relative to the rotor (2) and is placed in its closed configuration by the shackle (10) oriented radially. relative to the rotor (2).
    公开号:FR3013940A1
    申请号:FR1361921
    申请日:2013-12-02
    公开日:2015-06-05
    发明作者:Pascal Gautron
    申请人:Kuhn Audureau SA；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a device for attaching a knife to the rotor of a mower-brushcutter, comprising: - a shackle of which a branch is provided with an eyelet, the shackle bearing the knife, - an axis of link extending in length along a longitudinal geometric axis that it has, being able, along this geometric axis, to occupy a longitudinal position that is operational with respect to the shackle, in which operational longitudinal position the link axis is engaged in at least one fixed ear of the rotor, through the eyecup and is immobilized in the ear and in the eyelet along the geometric axis, - a means of longitudinal immobilization of the connecting axis having a closed configuration, wherein the means longitudinal immobilization immobilizes the link axis in its longitudinal position that is operational with respect to the shackle, which furthermore has a configuration of opening, wherein the longitudinal immobilization means allows a first displacement of the connecting axis and the shackle between them along the geometric axis, this first displacement leaving the connecting axis its longitudinal position operational with respect to the shackle Such a device is known from EP 2 366 275 A1. On this device, the longitudinal immobilization means comprises an elastic piece. According to a first variant embodiment, this resilient piece is a generally U-shaped spring inserted inside a radial slot that presents the ear connected to the rotor. According to a second variant embodiment, the elastic piece comprises a flat piece disposed at the end of a spring fixed inside the ear. The connecting axis comprises a groove adapted to cooperate with the elastic piece. In the longitudinal operational position of the connecting pin, its groove is located at the branches of the U, respectively at the flat part. The longitudinal immobilizing means can then be in a closed configuration, in which each leg of the U-shaped spring, respectively the flat part, is placed in the groove, which has the effect of immobilizing the following connection axis. its longitudinal geometric axis. The longitudinal immobilization means may also occupy an opening configuration, in which each leg of the U-shaped spring, respectively the flat part, is spaced from the groove. In this opening configuration, the longitudinal immobilization means releases the connecting axis and makes possible its extraction from the ear. A disadvantage of the known fastening device is that the elastic piece can be rendered inoperative by the introduction of dirt at the connecting axis and around the elastic piece. These dirt can prevent enough of the elastic part of the groove, which complicates or even disassembly of the connecting pin. In some cases, dirt can be housed between the elastic piece and the groove and tend, in the long run, to move the elastic piece to its opening configuration. It may follow the loss of the connecting pin and the shackle bearing the knife. The same consequence can come from a rupture of the elastic piece due, for example, to its oxidation after a certain number of hours of use of the machine. The object of the present invention is to propose a device for fixing a knife on the rotor of a mower-brush cutter which does not have the aforementioned drawback. For this purpose, the invention is characterized by the fact that the longitudinal immobilization means is designed to be placed in its opening configuration by the shackle having a non-radial orientation with respect to the rotor, the longitudinal immobilization means is designed to be placed in its closure configuration by the shackle having a radial orientation relative to the rotor. At rest, the shackle naturally has a non-radial orientation relative to the rotor. Indeed, by the self weight of the knife, the latter is oriented not radially, it is generally against the outer surface of the rotor and places the shackle in a non-radial orientation. The shackle then directs the longitudinal immobilization means in its opening configuration. The immobilizing means then allows a first displacement of the connecting axis and the shackle between them along the geometric axis. This first displacement causes the link axis to leave its operational longitudinal position and allows it to be extracted from the eyecup and / or the ear. With a view to extracting the connection axis of the eyecup and / or the ear, an operator grasps for example the connecting axis, for example by one of its ends, and makes him make the first displacement Thus, the opening configuration of the longitudinal immobilization means is determined by the non-radial orientation of the shackle. Due to the moment of inertia of the shackle and the knife around the connecting axis, this orientation still exists at rest. As a result, the risk that the longitudinal immobilizing means can not be placed in its opening configuration is very small. The maintenance of the fixing device and the rotor is greatly facilitated. At work, the rotor rotating at high speed, the moment of inertia of the shackle and the knife around the connecting axis causes that the shackle is oriented radially to the rotor. It then places the longitudinal immobilization means in its closure configuration, so that as long as the rotor rotates, the link axis can not leave its operational longitudinal position. During work, accidental opening of the longitudinal immobilization means is therefore excluded. This results in a very high security of use of the machine According to an advantageous characteristic of the invention, the fixing device comprises a first blocking means, the first blocking means has a locking configuration, in which it maintains the linkage axis in its operative longitudinal position 25 while the longitudinal immobilizing means is in its opening configuration, the first blocking means leaves its blocking configuration by an external manual action exerted on it. When the longitudinal immobilizing means is in its opening configuration, this first locking means secures the link axis in its operational longitudinal position. Thus, when the rotor is at rest, the connecting pin can not accidentally extract itself from the eyecup and / or the ear. This results in great safety of the machine when it is maneuvered or moved on roads and roads. Other features and advantages of the invention will emerge from the following description with reference to the accompanying drawings, which show in particular several non-limiting exemplary embodiments of the fastening device according to the invention. In these drawings: FIG. 1 is a perspective view of a mower-cutter with a cutting tool coupled to a tractor; FIG. 2 is a perspective view of the cutting tool comprising a rotor carrying at least one knife and provided with a knife attachment device according to the invention; Figures 3 to 9 show a first embodiment of the knife attachment device according to the invention; FIGS. 10 to 16 show a second embodiment of the knife attachment device according to the invention, FIG. 15 being a view along section XV-XV of FIG. 13, FIG. 16 being a view in section XVI. -XVI of Figure 14; FIGS. 17 to 23 show a third exemplary embodiment of the knife attachment device according to the invention, FIG. 22 being a view along section XXII-XXII of FIG. 20, FIG. 23 being a view along section XXIII. XXIII of Figure 21. The attachment device (1) of a knife object of the invention is placed on the rotor (2) of a mower-brush cutter (3). Such a machine shown in FIG. 1 generally comprises a cutting tool (4) placed at the end of an articulated arm (5). This arm (5) is connected to a frame (6) positioned at the rear of a tractor (7) for moving and animating the cutting tool (4). The cutting tool (4) is shown in more detail in FIG. 2. The cutting tool (4) comprises a rotor (2) carrying a plurality of knives (8). Each knife 30 (8) has an opening (9) allowing the passage of a respective shackle (10). The shackle (10) carries the knife (8) and is articulated to the rotor (2) by means of the fastening device (1) object of the invention. As shown in Figure 2, the rotor (2) may have a high number of knives (8). Each knife (8) is disposed on the periphery of the rotor (2). Each knife (8) is carried by a respective shackle (10) which is articulated to the rotor (2) by means of a respective fixing device (1).
    [0002] At work, the rotor (2) is rotated about its longitudinal axis (11). Each shackle (10) and the knife (8) it carries are placed radially relative to the rotor (2) under the effect of centrifugal force. Knives (8) in motion then shred the branches and bushes and cut the grass and plants. The presence of an obstacle on part of the working width of the cutting tool (4) does not cause the locking of the rotor (2) because the knives (8) have a very high mobility around their shackles ( 10) and the shackles (10) are themselves hinged to the rotor (2). At rest, the rotor (2) being stopped, the knives (8) are placed non-radially relative to the rotor (2) under the effect of gravity. They fall for example against the peripheral surface (12) of the rotor (2). A device (1) for fixing a knife (8) to the rotor (2) according to the invention is shown in more detail in FIGS. 3 to 9 in particular. The fixing device (1) comprises a shackle (10). This comprises at least one branch (13, 14) provided with an eyelet (15, 16). This branch (13, 14) is extended by a curved portion (17) which is disposed in the opening (9) of the knife (8). This curved portion (17) holds the knife (8) in a radial direction to the rotor (2). The shackle (10) has a U shape. Its two branches (13 and 14) each have a respective eyelet (15, 16). The curved portion (17) of the shackle (10) joins the two branches (13 and 14). . The fixing device (1) also comprises a connecting pin (18). The connecting axis (18) has a longitudinal geometric axis (19) and extends in length along this longitudinal geometric axis (19). The longitudinal axis (19) extends along the longitudinal axis (11) of the rotor (2) around which the latter is rotated, for example substantially parallel to said longitudinal axis (11). The connecting pin 30 (18) may, along its geometric axis (19), occupy a longitudinal position that is operational with respect to the shackle (10). This position is shown in particular in FIG. 3. In this operational longitudinal position, the connecting pin (18) is engaged in at least one lug (20, 21) integral with the rotor (2). The ear (20) is visible in particular in Figure 5 which shows, exploded, the connecting axis (18), the shackle (10) and said ear (20). This lug (20) is for example in the form of a tab connected to the rotor (2). This lug extends from the peripheral surface (12) of the rotor (2), substantially radially to it, as shown in particular in FIGS. 6 and 7. The lug (20, 21) comprises an orifice (23, 24) in which the connecting pin (18) is inserted when in its operative longitudinal position. As shown by the sectional view of Figure 8, in this position, the connecting pin (18) passes through the orifice (23, 24). In its longitudinal operational position, the connecting pin (18) passes through the eyelet (15, 16) of the leg (13, 14) of the shackle (10). In this position, the orifice (23, 24) and the eyelet (15, 16) are substantially aligned along the geometric axis (19) of the connecting axis (18). As shown in Figures 3 and 8, the connecting pin (18) in its operative longitudinal position passes through each eyelet (15, 16) of the shackle (10). In addition, the connecting pin (18) is engaged in two lugs (20 and 21) connected to the rotor (2). The connecting pin (18) is inserted into each orifice (23, 24) through which it passes. The orifices (23 and 24) of the two lugs (20 and 21) and the two eyelets (15 and 16) are substantially aligned with each other along the geometric axis (19). In the operational longitudinal position of the connecting pin (18), each lug (20, 21) of the rotor (2) is contiguous to a respective leg (13, 14) of the shackle (10). In its longitudinal operational position, the connecting pin (18) is immobilized in the ear (20, 21) and in the eyelet (15, 16) along the geometric axis (19). For this purpose, the fixing device (1) according to the invention comprises a means of longitudinal immobilization (25) of the connecting axis (18). This longitudinal immobilization means (25) has in particular a closure configuration, in which the longitudinal immobilization means (25) immobilizes the connecting pin (18) in its operative longitudinal position relative to the shackle (10). This closure configuration is illustrated in FIGS. 3, 6 and 8. The longitudinal immobilization means (25) also has an opening configuration, in which it allows a first displacement of the connecting pin (18) and the shackle (10) between them along the geometric axis (19), this first displacement leaving the connecting axis (18) its operational longitudinal position relative to the shackle (10). This opening configuration is illustrated by FIGS. 4, 7 and 9. As shown in FIGS. 4 and 9, the connecting pin (18) can make said first displacement relative to the shackle (10) in one direction. indicated by the arrow (F). This first displacement allows the connecting pin (18) to be extracted from the eyelet (15, 16) and / or the lug (20, 21), for example to replace the connecting pin (18), the shackle (10) or the knife (8) after a number of hours of use of the mower-brush cutter (3).
    [0003] The invention is characterized in particular by the fact that the longitudinal immobilization means (25) is designed to be placed in its opening configuration by the shackle (10) having a non-radial orientation relative to the rotor (2) such that that of Figures 4 and 7. The longitudinal immobilization means (25) is configured to allow the first movement only when the shackle (10) has said non-radial orientation relative to the rotor (2). When the rotor (2) is stopped, the knife (8) falls against the peripheral surface (12) of the rotor (2) and drives the shackle (10) with it. This automatically directs the longitudinal immobilization means (25) into its aperture configuration, which allows an operator to translate the connecting pin (18) and the shackle (10) relative to one another. another along the geometric axis (19) to extract the connecting pin (18) from the eyelet (15, 16) and / or the ear (20, 21). In the case of the fixing device (1) of FIGS. 3 to 9, the connecting pin (18) is translated relative to the shackle (10) which, during said extraction of the connecting pin (18), remains at first immobile with respect to the ears (20 and 21) along the geometric axis (19). The invention is also characterized in that the longitudinal immobilizing means (25) is designed to be placed in its closed configuration by the shackle (10) having a radial orientation with respect to the rotor (2). This radial orientation is shown in FIGS. 3 and 6.
    [0004] The longitudinal immobilizing means (25) is thus configured to prevent the first movement when the shackle (10) is oriented radially to the rotor (2). When the rotor (2) is rotated, the knife (8) and the shackle (10) are oriented radially, the shackle then automatically places the longitudinal immobilization means (25) in its closed configuration. The first movement of the connecting pin (18) and the shackle (10) between them is then made impossible and the connecting pin (18) is immobilized in the ear (20, 21) and in the eyepiece (15, 16) along its geometric axis (19). According to the exemplary embodiments which will be described in more detail below, the non-radial orientation of the shackle (10) with respect to the rotor (2), in which the longitudinal immobilization means (25) is placed in its configuration. opening, is constituted at least by the non-radial orientation of the shackle (10) resulting from the knife (8) resting on the peripheral surface (12) of the rotor (2). An angle that said non-radial orientation associated with the longitudinal immobilization means (25) placed in its opening configuration forms with respect to the radial orientation of the shackle (10), is for example between 45 ° and 135 °, especially close to 90 °.
    [0005] The longitudinal immobilization means (25) comprises a first portion (26) of the connecting pin (18) and a second portion (27) of the ear (20) or the shackle (10), in particular the eyepiece (15). The longitudinal immobilization means (25) comprises in particular said first portion (26) and said second portion (27), which underlies the fact that the longitudinal immobilization means (25) is operational without any additional element cooperating with the connecting pin (18) and the ear (20) or shackle (10) and may be incorrectly mounted or lost. The first part (26) and the second part (27) are configured in such a way that in at least a first angular position of the first and second parts (26 and 27) between them around the geometric axis (19), the first portion (26) is prevented from crossing the second portion (27) along the geometric axis (19) from the operative longitudinal position of the first portion (26). The first part (26) and the second part (27) are also configured so that in a second angular position of the first and second parts (26 and 27) between them around the geometric axis (19), the first part (26) is allowed to pass through the second part (27) along the geometric axis (19). This second relative angular position is distinct from the first relative position. According to the exemplary embodiments of the figures, in the operational longitudinal position of the connecting pin (18) with respect to the shackle (10), the first portion (26) and the second portion (27) do not overlap with one another. geometric axis (19). As shown in Figures 3 to 9 associated with a first embodiment of the fastening device (1), the shackle (10) comprises the second portion (27), more precisely the second portion (27) is located at the level of the branch (13) of the shackle (10), in particular at the eyelet (15). In the longitudinal operative position of Figure 8 in particular, the second portion (27) is located between the first portion (26) and the lug (20) along the geometric axis (19). The connecting pin (18) has a retaining portion (28). A perspective view of this holding portion (28) is given in Figure 5. In the operative longitudinal position, this retaining portion (28) protrudes from the ear (20) along the geometric axis (19). The ear (20) is placed between the retaining portion (28) and the first portion (26). This retaining portion (28) makes it possible to grasp the connecting pin (18) in order to insert it into the ear (20) and the shackle (10), or to extract it as the case may be. It could also be envisaged that the retaining portion (28) serves to prevent a translation of the connecting pin (18) from its operative longitudinal position, in an oriented direction from the ear (20) to the branch (13). . In the first relative angular position of FIG. 8, the first displacement is prevented so that the first portion (26) can not be translated towards the ear (20), so that it can not pass either through the branch (13) of the shackle (10), or through the orifice (23) of the ear (20). A second embodiment of the fixing device (1) is illustrated in FIGS. 10 to 16. According to this second exemplary embodiment, the ear comprises the second part (27), more precisely the second part (27) is located at level of the orifice (23) of the ear (20). The connecting pin (18) also comprises a retaining portion (28), particularly visible in Figure 12, whose configuration and function are similar to those of the first embodiment. In the first relative angular position of FIG. 15, the first displacement indicated by the arrow (F) of FIG. 16 is prevented so that the first portion (26) of the connecting pin (18) can neither be disengage from the branch (13) of the shackle (10), or pass through the orifice (23) of the ear (20). A third embodiment of the fixing device (1) is illustrated in FIGS. 17 to 23. According to this third embodiment, the lug (20) comprises the second part (27), more specifically the second part (27). is located at the orifice (23). In the longitudinal operational position of the connecting pin (18) shown in particular in FIG. 22, the shackle (10) is held in place along the geometric axis (19) between a retaining portion (28) of the pin link (18) and the ear (20). According to the geometric axis (19), there are in the order the retaining part (28), the shackle (10), the lug (20) and finally the first part (26) of the connecting axis ( 18). In the first relative angular position of FIG. 22, the first displacement (F) indicated by the arrow of FIG. 23 is prevented so that the first portion (26) can not be translated relative to the ear (20). ) towards the branch (13) of the shackle (10). In this third embodiment, the retaining portion (28) serves in particular to prevent a translation of the connecting pin (18) from its operational longitudinal position in the opposite direction of the first displacement indicated by the arrow (F). According to the invention, the shackle (10), in its radial orientation with respect to the rotor (2), places the first and second parts (26 and 27) in their first relative angular position, the shackle (10), in its non-radial orientation relative to the rotor (2), places the first and second parts (26 and 27) in their second relative angular position. According to the first exemplary embodiment, the radial orientation of FIGS. 3 and 6 is therefore associated with the first relative angular position shown in FIG. 8. Similarly, for the second exemplary embodiment, the views of FIGS. 10 and 13 are associated. In the third embodiment, the views of FIGS. 17 and 20 correspond to the view of FIG. 22. Furthermore, according to the first embodiment, the non-radial orientation of FIGS. and 7 is associated with the second relative angular position shown in FIG. 9. Similarly, for the second exemplary embodiment, the views of FIGS. 11 and 14 are associated with the view of FIG. 16. For the third exemplary embodiment, the FIGS. 18 and 21 correspond to the view of FIG. 23. As the three embodiments described above show, the invention advantageously provides that the first part (26) presents a first transverse section devoid of symmetry of revolution about the geometric axis (19), the second portion (27) has a second cross section also devoid of symmetry of revolution about the geometric axis (19), A cross section is defines as a section in a plane perpendicular to the geometric axis (19). According to the embodiments of the figures, the connecting pin (18) has a substantially cylindrical shape. The first part (26) is a part of the length of the connecting axis (18) devoid of symmetry of revolution about its geometric axis (19). This first portion (26) therefore has a first cross section devoid of symmetry of revolution around the geometric axis (19). According to the first embodiment, the second part (27) is at least a part, or even all, of a hole (29) that the eyelet (15) has. The second portion (27) therefore extends along the geometric axis (19) over all or part of the length of the hole (29) measured along the geometric axis (19). According to the second and third exemplary embodiments, the second portion (27) is at least a part, or even all, of the orifice (23). The second portion (27) therefore extends along the geometric axis (19) over all or part of the length of the orifice (23) measured along the geometric axis (19). The first and second transverse sections are such that in the first relative angular position of the first and second portions (26 and 27), the first portion (26) can not be translated through the second portion (27) along the geometric axis (19). This is achieved by the fact that in the first relative angular position, the projection of the first transverse section on a plane perpendicular to the geometric axis (19) does not fit into the projection of the second cross section on said plane.
    [0006] The first and second transverse sections are also such that in the second relative angular position of the first and second portions (26 and 27), the first portion (26) can pass through the second portion (27) along the geometric axis (19). ). This is achieved by the fact that in the second relative angular position, the projection of the first cross section on a plane perpendicular to the geometric axis (19) is in the projection of the second cross section on said plane. The first portion (26) can be translated through the second portion (27) along the geometric axis (19) only when the shackle (10) has the non-radial orientation relative to the rotor (2). According to the embodiments of the figures, the first and second transverse sections have respective shapes substantially identical to each other.
    [0007] According to the first exemplary embodiment, the eyelet (15) has a hole (29) having the second non-symmetrical cross section around the geometric axis (19). As shown in particular in FIGS. 3 and 8, the first portion (26) of the connecting pin (18) having the first transverse section is located, in the operational longitudinal position of the connecting pin (18), between the branches (13 and 14) of the shackle (10). The ear (20) is placed on the side of the branch (13) opposite to that where the first portion (26). The orifice (23) of the lug (20) has a cross section whose shape is at least identical to that of the first cross section, or whose cross section is circumscribed to the first cross section. When the shackle (10) is in its non-radial orientation relative to the rotor (2), the first transverse section and the second transverse section coincide angularly with each other about the geometric axis (19) so that the first and second parts (26 and 27) can pass one inside the other. In Fig. 5, the first and second cross sections are shown in angular coincidence with each other. As represented in FIG. 9, the first part (26) can thus, from its operational longitudinal position, be moved along the arrow (F) towards the ear (20) while passing inside the second part (27). The first part (26) can then also pass through the orifice (23) of the lug (20), so that the connecting pin (18) can be extracted from the eyelet (15) and possibly also from the ear (20). When the shackle (10) is in its radial orientation with respect to the rotor (2) and the connecting pin (18) is in its operative longitudinal position, the first transverse section and the second cross section do not coincide angularly. with each other. Thus, the first and second parts (26 and 27) can not pass one inside the other, which is clearly shown in FIG. 8. The connection axis (18) can not then be extracting the shackle (10) by sliding the first portion (26) inside the second portion (27). According to the second embodiment, the orifice (23) of the ear (20) has the second non-symmetrical cross section around the geometric axis (19). The longitudinal immobilizing means (25) comprises a connection by shape cooperation between the connecting pin (18) and the shackle (10). This connection by shape cooperation is such that the connecting pin (18) in its operative longitudinal position and the shackle (10) jointly pivot about the geometric axis (19) relative to the second portion (27) that the ear (20) comprises. As shown in particular in Figure 15, the connection by cooperation of shapes takes place between the hole (29) of the eyelet (15) and the portion of the connecting pin (18) nested in the hole (29). According to this representation, this connection by shape cooperation takes place between the first portion (26) of the connecting pin (18) and the hole (29) of the eyelet (15). According to this representation, the hole (29) of the eyelet (15) has a cross section that can cooperate with the first cross section so that a pivoting of the shackle (10) around the geometric axis (19) is transmitted to the connecting pin (18). In particular, the cross section of the hole (29) and the first cross section of the first portion (26) have respective shapes substantially identical to each other, which appears in the exploded view of Figure 12. When the shackle (10) is in its non-radial orientation relative to the rotor (2), it directs the first cross section so that it coincides angularly with the second cross section. In Fig. 12, the first and second cross sections are shown in angular coincidence with each other. As shown in FIG. 16, the first part (26) can then pass inside the second part (27). The first part (26) can thus, from its operational longitudinal position, be moved in the direction of the arrow (F) towards the ear (20) and pass through the orifice (23) of the ear (20). . The connecting axis (18) can thus be extracted from the eyecup (15) and possibly also from the ear (20). When the shackle (10) is in its radial orientation relative to the rotor (2) and the connecting pin (18) is in its operative longitudinal position, the first transverse section is oriented so that it does not coincide more angularly with the second cross section. As shown in FIG. 15, the first part (26) can not then pass inside the second part (27), so that the connection axis (18) can not be extracted from the shackle (10) by sliding the first portion (26) within the second portion (27).
    [0008] According to the third embodiment, the orifice (23) of the lug (20) has the second non-symmetrical cross section around the geometric axis (19). The longitudinal immobilizing means (25) comprises a connection by shape cooperation between the connecting pin (18) and the shackle (10). This connection by cooperation of shapes is such that the connecting pin (18) in its operative longitudinal position and the shackle (10) jointly pivot about the geometric axis (19) relative to the second portion (27) of the ear (20). As shown in particular in FIG. 22, the connection by cooperation of shapes takes place between the connecting axis (18) and the eyelet (15), precisely between the hole (29) of the eyelet (15) and the part of the connecting pin (18) nested in the hole (29).
    [0009] According to this representation, the hole (29) of the eyelet (15) has a cross section that can cooperate with the cross section of a longitudinal portion (30) of the connecting pin (18) so that a pivoting the shackle (10) around the geometric axis (19) is transmitted to the connecting pin (18). In particular, as it appears in the exploded view of FIG. 19, the cross section of the hole (29) and the cross section of the longitudinal portion (30) of the connecting pin (18) have respective shapes substantially identical to each other. When the shackle (10) is in its non-radial orientation relative to the rotor (2), it directs the first cross section so that it coincides angularly with the second cross section. In Fig. 19, the first and second cross sections are shown in angular coincidence with each other. As shown in FIG. 23, the first part (26) can then pass inside the second part (27). The first part (26) can thus, from its operational longitudinal position, be moved along the arrow (F) towards the ear (20) and through the orifice (23) of the ear (20). The connecting axis (18) can thus be extracted from the ear (20). When the shackle (10) is in its radial orientation relative to the rotor (2) and the connecting pin (18) is in its operative longitudinal position, the first transverse section is oriented so that it does not coincide more angularly with the second cross section. Thus, as shown in FIG. 22, the first part (26) can not pass inside the second part (27), so that the connecting axis (18) can not be extracted from the lug (20) by sliding the first portion (26) within the second portion (27). According to this third embodiment, in the operational longitudinal position of the connecting pin (18), the lug (20) and the leg (13) of the shackle (10) which is contiguous to it are trapped axially between the part retainer (28) of the connecting pin (18) located next to the shackle (10) and the first portion (26) located next to the second portion (27). As it appears in the aforementioned embodiments, the invention provides that in the operational longitudinal position of the connecting pin (18), the first portion (26) and the second portion (27) can pivot freely. one relative to the other around the geometric axis (19). Thus, if in operation the knife (8) or the shackle (10) strikes an obstacle, the shackle (10) can leave its radial orientation to disappear in the face of the obstacle and this without rotating the link axis (18) with her. According to the first exemplary embodiment of FIGS. 3 to 9, the fixing device (1) comprises a means of immobilization in rotation (31) intended to make the connecting pin (18), in its longitudinal operational position, stationary or substantially stationary in rotation around the geometric axis (19) relative to the ear (20, 21). This immobilizing means reduces the wear of the connecting pin (18) consecutive to rotation or to repeated pivoting on itself around the geometric axis (19) during the operation of the mower-brush cutter (3). ). According to this first exemplary embodiment, the rotational immobilization means (31) comprises a connection by cooperation of shapes between a longitudinal part (32) of the connecting pin (18) and the orifice (23) of the ear (20) in which the connecting pin (18) is engaged, this longitudinal portion (32) cooperates with the orifice (23) so as to be immobilized in rotation about the geometric axis (19). The connection by cooperation of forms takes place between the orifice (23) of the lug (20) and the longitudinal portion (32) nested in this orifice (23). An advantage of this form-cooperative connection is that immobilization in rotation of the connecting shaft (18) can be effected by the sole connecting axis (18) and orifice (23) of the ear (20). . The use of an additional piece such as a screw, a pin or a pin cooperating with the connecting pin (18) and the lug (20) is then superfluous. In addition, during operation, the longitudinal portion (32) of the connecting pin (18) for its immobilization in rotation is housed inside the orifice (23) and is thus protected from shocks. In this first embodiment, the longitudinal portion (32) visible in particular in Figures 5 and 8 has a cross section devoid of symmetry of revolution about the geometric axis (19). As shown in FIG. 8, this cross section fits into the cross section of the orifice (23). The respective cross sections of the longitudinal portion (32) and the orifice (23) have respective respective shapes substantially identical to each other. According to an advantageous characteristic of the invention, the fastening device (1) comprises a first blocking means (33), the first blocking means (33) has a locking configuration, in which it maintains the connection axis ( 18) in its longitudinal operational position while the longitudinal immobilizing means (25) is in its opening configuration, the first blocking means (33) leaves its blocking configuration by an external manual action exerted on it . Thus, when the rotor (2) is at rest, an external manual action on the connecting shaft (18) is required to extract it from the eyecup (15, 16) and / or the ear (20, 21), which he can not extract from himself. According to the first and second exemplary embodiments, the first blocking means (33) comprises in particular a first groove (34) inside the orifice (24) of the ear (21). According to the third embodiment, the first locking means (33) comprises in particular a first groove (34) inside the orifice (23) of the ear (20). The first blocking means (33) also comprises an elastically deformable element (35). In these exemplary embodiments, the first groove (34) accommodates the elastically deformable element (35). The first blocking means (33) further comprises a second groove (36) outside the connecting pin (18). In the longitudinal operational position of the latter, the elastically deformable element (35) is housed in the second groove (36), which places the first blocking means (33) in its locking configuration. Thus, when the longitudinal immobilizing means (25) is in its opening configuration of Figures 9, 16 and 23 respectively, the connecting pin (18) can remain in its operational longitudinal position. An external manual action is required to disengage the first blocking means (33) from its blocking configuration and thereby allow the linkage shaft (18) to leave its operational longitudinal position. This external manual action makes it possible to overcome the resistant force produced by the first blocking means (33) on the connection axis (18) in the blocking configuration. According to the exemplary embodiments, this resistant force is generated by the elastically deformable element (35). Furthermore, during assembly / disassembly operations of the fastening device (1), the first locking means (33) serves as a means for axially positioning the connecting pin (18) with respect to the shackle (10). ) and the ear (s) (20, 21). Indeed, the first blocking means (33) is in its blocking configuration only when the connecting axis (18) is positioned, along the geometric axis (19), in its operational longitudinal position. In another longitudinal position of the link axis (18), such as that of the exploded views of Figures 5, 12 and 19 respectively, the first blocking means (33) is in an unlocked configuration. According to an advantageous characteristic of the invention, the fastening device (1) comprises a second blocking means (37) limiting or even preventing a second displacement of the connecting pin (18) with respect to the shackle (10), this second displacement is in opposite direction of the first displacement, along the geometric axis (19) and from the operational longitudinal position, the second locking means (37) comprises a third portion (38) of the connecting axis (18) and a fourth portion (39) of the lug (20, 21) or lug (20, 21) of the securing device (1), the third and fourth portions (38 and 39) may cooperate with each other. with each other, directly or indirectly. According to a variant of the second locking means (37) that the embodiments of the figures comprise, the third portion (38) is located at one end (40, 41) of the connecting pin (18). In the first and second exemplary embodiments, the third portion (38) is located at the end (41) and can bear against a fourth portion (39) of the other ear (21) distant from the ear (20). These third and fourth parts (38 and 39) cooperate directly with each other. This third part (38) abuts against the inner part of the orifice (24) of this other lug (21) when the connecting pin (18) is in its operative longitudinal position. In the third embodiment, the third portion (38) is constituted by the retaining portion (28) located at the end (40) of the connecting pin (18). This retaining portion (28) is a shoulder portion of the connecting pin (18). This third portion (38) can bear against a branch (14) of the shackle (10), the shackle (10) in turn bearing against a second portion (39) of the ear (20). This second part (39) comprises in particular the face of the ear (20) adjacent the branch (13) of the shackle (10). In this case, the third and fourth parts (38 and 39) cooperate indirectly with each other. According to an advantageous characteristic of the invention, in the operational longitudinal position of the connecting pin (18), the third portion (38) is situated in the space of the ear (21) and / or the shackle (10). Thus, during operation of the machine, the second blocking means is protected from shocks. In the first and second exemplary embodiments, the third portion (38) is housed within the orifice (24) of said other lug (21) when the connecting pin (18) is in its position. operational longitudinal.
    [0010] Of course, the invention is not limited to the embodiments described and shown in the accompanying figures. Modifications are possible, in particular as regards the constitution, the arrangement or the number of the various elements, by different combination of the above-mentioned characteristics, or by substitution of technical equivalents, without thereby going outside the scope of protection of the invention.
    权利要求:
    Claims (13)
    [0001]
    CLAIMS1- Device for fixing (1) a knife (8) on the rotor (2) of a faucheused brushcutter (3), comprising: - a shackle (10), a branch (13, 14) is provided with a eyelet (15, 16), the shackle (10) carrying the knife (8), - a connecting shaft (18) extending in length along a longitudinal geometric axis (19) that it has, being able, along this axis geometric (19), to occupy an operative longitudinal position relative to the shackle (10), in which operational longitudinal position the connecting axis (18) is engaged in at least one lug (20, 21) integral with the rotor (2) , passes through the eyelet (15, 16) and is immobilized in the ear (20, 21) and in the eyelet (15, 16) along the geometric axis (19), - a longitudinal immobilization means (25); ) of the connecting pin (18) having a closure configuration, wherein the longitudinal immobilizing means (25) immobilizes the connecting pin (18) in its position l longitudinal axis which is operative with respect to the shackle (10), and which also has an opening configuration, in which the longitudinal immobilization means (25) allows a first displacement of the connecting pin (18) and the shackle (10). ) between them along the geometric axis (19), this first displacement leaving the connecting axis (18) to its operational longitudinal position relative to the shackle (10), characterized in that the longitudinal immobilization means ( 25) is adapted to be placed in its opening configuration by the shackle (10) having a non-radial orientation with respect to the rotor (2), the longitudinal immobilizing means (25) is adapted to be placed in its configuration. closure by the shackle (10) having a radial orientation with respect to the rotor (2).
    [0002]
    2- fixing device (1) according to claim 1, characterized in that the longitudinal immobilizing means (25) comprises a first portion (26) of the connecting pin (18) and a second portion (27) of the ear (20) or the shackle (10), in particular the eyelet (15), there is at least a first angular position of the first and second parts (26 and 27) between them about the geometric axis ( 19), wherein the first portion (26) is prevented from passing through the second portion (27) from the operative longitudinal position, there is a second angular position of the first and second portions (26 and 27) therebetween about the axis geometry (19), wherein the first portion (26) is permitted to pass through the second portion (27).
    [0003]
    3- Fixing device (1) according to claim 2, characterized in that the shackle (10), in its radial orientation relative to the rotor (2), places the first and second parts (26 and 27) in their first position relative angle, the shackle (10), in its non-radial orientation relative to the rotor (2), places the first and second parts (26 and 27) in their second relative angular position.
    [0004]
    4- Fixing device (1) according to claim 2 or 3, characterized in that the first portion (26) has a first cross section devoid of symmetry of revolution about the geometric axis (19), the second portion (27). ) has a second cross section also devoid of symmetry of revolution around the geometric axis (19).
    [0005]
    5. Fastening device (1) according to any one of claims 2 to 4, characterized in that in the operational longitudinal position of the connecting shaft (18), the first portion (26) and the second portion (27). ) can rotate freely relative to each other about the geometric axis (19) of the connecting pin (18).
    [0006]
    6. Fastening device (1) according to any one of claims 2 to 5, characterized in that the shackle (10), in particular the eyelet (15), comprises the second part (27), the fixing device ( 1) comprises a rotational immobilization means (31) intended to make the connecting pin (18), in its longitudinal operational position, stationary or substantially immobile in rotation about the geometric axis (19) relative to the ear (20, 21).
    [0007]
    7- Fastening device (1) according to claim 6, characterized in that the means for immobilization in rotation (31) comprises a connection by cooperation of forms between a longitudinal portion (32) of the connecting pin (18). and the orifice (23) of the lug (20) in which the connecting pin (18) is engaged, this longitudinal portion (32) cooperates with the orifice (23) so as to be immobilized in rotation around it of the geometric axis (19).
    [0008]
    8- fixing device (1) according to any one of claims 2 to 5, characterized in that the lug (20) comprises the second portion (27), the longitudinal immobilizing means (25) comprises a connection by form-fitting relationship between the connecting pin (18) and the shackle (10), this shape-forming connection is such that the connecting pin (18) in its operative longitudinal position and the shackle (10) jointly pivot about of the geometric axis (19) relative to the second part (27).
    [0009]
    9- Fastening device (1) according to any one of claims 1 to 8, characterized in that the fastening device (1) comprises a first locking means (33), the first locking means (33) has a blocking configuration, in which it maintains the connecting pin (18) in its longitudinal operative position while the longitudinal immobilizing means (25) is in its opening configuration, the first blocking means (33) leaves its blocking configuration by an external manual action exerted on it.
    [0010]
    10- Fixing device (1) according to any one of claims 1 to 9, characterized in that the fixing device (1) comprises a second locking means (37) limiting or preventing a second movement of the axis link (18) relative to the shackle (10), this second displacement is in opposite direction to the first displacement, along the geometric axis (19) and from the operational longitudinal position, the second locking means (37) comprises a third portion (38) of the connecting pin (18) and a fourth portion (39) of the ear (20, 21) or an ear (20, 21) of the fastening device (1), the third and fourth parts (38 and 39) can cooperate with each other, directly or indirectly.
    [0011]
    11- Fastening device (1) according to claim 10, characterized in that in the operative longitudinal position of the connecting pin (18), the third portion (38) is located in the bulk of the ear (21). ) and / or the shackle (10).
    [0012]
    12- Rotor (2) of a mower-brush cutter (3) equipped with at least one knife (8), characterized in that it comprises at least one fixing device (1) of the knife (8) according to the any of claims 1 to 11.
    [0013]
    13- mower-brush cutter (3) comprising a rotor (2) equipped with at least one knife (8), characterized in that the rotor (2) comprises at least one attachment device (1) of the knife (8) according to the any of claims 1 to 11.
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    同族专利:
    公开号 | 公开日
    PL2878188T3|2017-04-28|
    FR3013940B1|2015-12-04|
    EP2878188B1|2016-09-14|
    DK2878188T3|2017-01-09|
    EP2878188A1|2015-06-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP2039234A1|2007-09-21|2009-03-25|Votex B.V.|Flail device and method for coupling and uncoupling a flail|
    EP2366275A1|2010-03-16|2011-09-21|Kuhn-Audureau S.A.|Device for fastening knives on the rotor of a hedge and grass cutter|
    FR2963201A1|2010-07-30|2012-02-03|Claude Rougeron|System for fixing wear parts on lugs of rotor of e.g. verge cutter, has spring that is compressed using tool head and disengaged from groove to allow translation of axle during deactivation of fixation of parts|EP3172961A1|2015-11-25|2017-05-31|Europlastic|Self-venting cover element for plant culture|
    US20180027730A1|2014-12-16|2018-02-01|Actibac|Mowing or grinding device|
    FR3050955B1|2016-05-06|2020-01-03|Kuhn-Audureau Sa|MACHINERY FOR MANAGEMENT OF ARTICULATED ARM CARRYING TOOL|
    CN106638749A|2016-10-13|2017-05-10|天津市博瑞克泵业科技发展有限公司|Rotary-cut type movable drag of drag suction dredger|
    CN110700343B|2019-09-05|2022-02-01|商丘师范学院|Culvert cleaning device for irrigation canal|
    GB2588898A|2019-11-12|2021-05-19|Mcconnel Ltd|Flail attachment|
    法律状态:
    2015-11-23| PLFP| Fee payment|Year of fee payment: 3 |
    2016-11-21| PLFP| Fee payment|Year of fee payment: 4 |
    2017-11-21| PLFP| Fee payment|Year of fee payment: 5 |
    2019-09-27| ST| Notification of lapse|Effective date: 20190906 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1361921A|FR3013940B1|2013-12-02|2013-12-02|DEVICE FOR FASTENING KNIFE ON THE ROTOR OF A MOWER-BRUSHCUTTER|FR1361921A| FR3013940B1|2013-12-02|2013-12-02|DEVICE FOR FASTENING KNIFE ON THE ROTOR OF A MOWER-BRUSHCUTTER|
    EP14195636.7A| EP2878188B1|2013-12-02|2014-12-01|Device for fastering a knive on the rotor of a hedge and grass cutter|
    DK14195636.7T| DK2878188T3|2013-12-02|2014-12-01|A device for attaching the blade to the rotor in a mower / brushcutter|
    PL14195636T| PL2878188T3|2013-12-02|2014-12-01|Device for fastering a knive on the rotor of a hedge and grass cutter|
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