Mountable reversible plough

Abstract

A mounted reversible plough comprises an attachment member in relation to a traction machine, a reversing device hinged to the attachment member about a reversing axis, a reversing actuator located between the attachment member and the reversing device, and a carrying frame. The frame is fastened to the reversing device by a linearization actuator of the frame itself and a hinged arm. The frame carries two rows of working elements which work alternately according to the position of the reversing device about the reversing axis. The hinged arm is hinged to the frame about a linearization axis of the frame at a first end of the hinged arm and to the reversing device about a hinged axis at an opposite second end of the hinged arm. The linearization actuator is actuated by pressurized fluid, the flow of which can be intercepted by a valve to limit the linearization of the frame actuated by the reversing actuator when the frame rotates about the reversing axis. The valve is actuated according to the relative angular position of the frame about the reversing axis.

Description

[0001] The present invention relates to an installation-type reversible plough comprising an attachment member in relation to a tractor, a reversing device hinged to the attachment member, and a reversing actuator disposed between the attachment member and the reversing device.

[0002] In mounted reversible tillers, a hydraulically actuated reversing assembly is typically included. This assembly rotates the tiller frame 180° around the reversing axis, allowing the rows of tillage elements to operate alternately in the soil to be tilled, depending on the position of the reversing blocks around the axis. The working width of the tillage elements is usually adjustable. As this adjustment changes, the angle of inclination of the frame carrying the tillage assembly relative to the tiller's reversing axis also changes. However, this presents some problems because the reversing assembly is actuated to rotate the frame 180° around the reversing axis. For example, as the working width increases, the center of gravity of the rotating portion of the tiller may hinder the completion of rotation; that is, parts of the tiller may strike the ground in an undesirable manner.

[0003] To prevent this drawback, a linearization system is provided that acts on an articulated quadrilateral through which the plow frame is fastened to the reversing device. The plow frame is "straightened" relative to the reversing axis by a linearization actuator with hydraulic actuation, the path of which is limited by a limiting device.

[0004] As described in WO2014 / 067508, this path is restricted by a mechanical gripper that generates a pressure peak in the hydraulic system used to actuate the linearizing actuator, thereby activating the flipping actuator once the linearizing actuator has produced the desired linearization action.

[0005] However, mechanical limiters involve various drawbacks. Furthermore, this linearization system suffers from the problem that the hydraulically actuated linearization actuator may produce unintended movements during the rotation of the plow frame, causing plow components to strike the ground in undesirable ways. During plow rotation, these unintended movements of the linearization actuator are caused by leakage or reverse pressure within the linearization actuator's hydraulic circuit.

[0006] EP3427559 describes a solution developed in an attempt to overcome these drawbacks. In this case, a valve is used to intercept the flow of pressurized fluid that actuates the linearized actuator.

[0007] The valve is mounted on the plow frame and actuated by a rod connected to a fulcrum, through which the linearization actuator is hinged to the tilting mechanism. In this way, the linearization of the plow frame can be achieved by detecting the position of the plow frame relative to the tilting mechanism's axis of motion. Therefore, the actuation of the interceptor valve must take into account the adjustment of the rod responsible for changing the plow's traction, that is, the relative position between the plow and the traction machine. However, this structure involves the dangerous exposure of the rod used to actuate the interceptor valve to accidental impacts that could deform it. Furthermore, this structure involves the use of numerous connecting rods, which are extremely sensitive to potential mechanical downtime (play, malfunction, backlash, fluctuation) and must therefore be carefully managed.

[0008] Other examples of plows are described in US 4207951, FR 2517506, DE 68919954 or EP 0534691.

[0009] The technical problem solved by the present invention is to provide an mounted reversible plow that is constructed, in both structure and function, to at least partially overcome one or more of the disadvantages of the prior art described herein.

[0010] Another object of the present invention is to provide an mounted reversible plow with an interceptor valve having a simplified actuation mechanism compared to the cited prior art.

[0011] The present invention addresses this problem by constructing an mounted, reversible plow according to the described embodiments.

[0012] Using this invention, a stop valve keeps the extension of the linearizing actuator constant and equal to the desired value during the rotation of the plow. In practice, advantageously, the stop valve, with its pressurized fluid flow, prevents any leakage or reverse pressure within the hydraulic circuit of the linearizing actuator, thus preventing undesirable movement of the linearizing actuator during the rotation of the plow frame. In this way, the stop valve acts as a safety device, preventing undesirable movement and, consequently, preventing parts of the plow from impacting the ground in an undesirable manner during rotation.

[0013] According to one aspect of the invention, the frame of the plow is fastened to the reversing device by means of a hinge arm of the frame and a linearization actuator, the hinge arm being hinged to the frame at a first end about the linearization axis of the frame and the opposite second end of the hinge arm being hinged to the reversing device about the hinge axis, and an intercepting valve is configured to intercept the flow of pressurized fluid so that the linearization of the frame is kept constant in a manner actuated by the linearization actuator when the frame is rotated about the reversing axis.

[0014] Alternatively, the intercept valve can be placed on the tilting actuator and controlled by a rod mounted on the tilting device. In another embodiment, the intercept valve is fixed to the tiller's spindle box facing the traction machine and controlled by an abutment portion mounted on the rotating pin of the tilting device and preferably secured in a rotational manner relative to the rotating pin. This system solves the problem of assembly downtime and provides a simple and effective valve control structure.

[0015] According to another advantageous aspect, due to the effect of the overturning device on the regulation of the pressurized fluid supplied to the linearizing actuator, the present invention allows the extension of the plow's linearizing actuator to remain constant and equal to the desired value when the frame has been rotated 180°.

[0016] Preferably, the tilt angle of the frame can be adjusted, and the valve intercepts the flow of pressurized fluid to the linearizing actuator according to this tilt angle. It may be noted that, in this context, the term "tilt angle" preferably refers to the rotation angle of the frame about the tilting axis of the plow. According to an additional aspect, the linearizing actuator, together with the articulated arm, forms a hinged quadrilateral, the remaining two sides of which are preferably formed by: the tilting device located between the hinge axis and a rotatably fastened axis at a first end of the linearizing actuator pointing towards the tilting mechanism; and the frame located between a rotatably fastened axis at a second end opposite to the linearizing axis of the linearizing actuator.

[0017] The overturning actuator preferably has a first end and a second end, the first end being fastened to an attachment member of the plow relative to the traction machine, and the second end being fastened to the overturning device of the plow.

[0018] Preferably, an adjustment actuator is provided for changing the working width between consecutive tillage elements.

[0019] The features and advantages of the invention will be better understood from the detailed description of preferred embodiments of the invention illustrated by way of non-exemplary embodiments, with reference to the accompanying drawings, in which:

[0020] - Figure 1 This is an overall side view of a reversible plow in its non-operational configuration.

[0021] - Figure 2 Is with Figure 1 Detailed view of the plow's turning mechanism and turning actuator;

[0022] - Figure 3 , Figure 5 , Figure 7 and Figure 9 yes Figure 2A detailed front view of the plow, in which the plow occupies different angular positions relative to the plow's rotation axis.

[0023] - Figure 4 , Figure 6 , Figure 8 and Figure 10 They are based on and Figure 3 , Figure 5 , Figure 7 and Figure 9 A side-view perspective with relevant details;

[0024] - Figure 11 and Figure 12 This is a perspective view showing details of a plow according to a second embodiment of the present invention.

[0025] In the diagram, a reversible type of mounted plow is typically designated as 1. The plow 1, for example, is provided with an attachment member 2 for a tractor of the type with a three-point spindle box 8, which carries a kingpin 3, the axis X of which defines the plow's reversing axis.

[0026] On one hand, the main pin 3 can rotate freely relative to the component 2 about the flipping axis X. A flipping device 4 is mounted on the main pin 3, which is configured to rotate about the flipping axis when the flipping actuator 6 is actuated, for example by a hydraulic jack. Preferably, the main pin 3 and the flipping device 4 are fixed in a rotatable manner about the flipping axis X, and in some embodiments a bushing 5 is provided, which is preferably inserted between the main pin 3 and the component 2 to facilitate rotation of the main pin 3 relative to the component 2 about the flipping axis X. It can be noted that, on one hand, the main pin 3 forms an integral part of the flipping device 4.

[0027] As in Figure 3 As better illustrated in some embodiments, the flipping device 4 includes a flipping arm 7 and an actuating arm 9, which are opposite to each other, and in some embodiments, the flipping arm and the actuating arm extend from the master pin 3 in a generally radial direction, preferably in a direction generally perpendicular to the flipping axis X. One end of the flipping actuator 6 is hinged to the actuating arm 9, and the opposite end of the flipping actuator 6 is preferably pivotally fastened to a pin 21, which is fixedly engaged to the spindle housing 8.

[0028] Preferably, the flip actuator 6 is pivotally hinged to the actuator arm 9 about the axis Y of the pin 22.

[0029] Preferably, the flipping actuator 6 includes: a cylinder 61 pivotally secured to pin 21; and a piston 62 pivotally secured to pin 22.

[0030] In another embodiment, cylinder 61 is pivotally secured to pin 22, and piston 62 is pivotally secured to pin 21.

[0031] Advantageously, the flip arm 7 can form the sides of a hinged quadrilateral, which is typically designated as 10 and illustrated in Figure 1 In this quadrilateral, the remaining three sides are formed by the articulated arm 11, the linearization actuator 12, and a frame of the plow, typically designated 13. In some embodiments, the frame portion forming one side of the quadrilateral 10 is located between the linearization axis 15 and the axis for rotatably securing the opposite second end of the linearization actuator 12 to the tilting arm 7.

[0032] Preferably, the articulated arm 11 and the linearizing actuator 12 are hinged to the tilting arm 7 near the master pin 3 and at a distal position relative to the master pin, respectively. The hinge axis of the articulated arm 11 is designated as the hinge axis 14 and may include a pin 14a defining the axis itself.

[0033] In some embodiments, the opposite end of the articulated arm 11 may be hinged to the frame 13 by an additional pin 15a, the axis 15 of which is thus indicated as the linearized axis of the frame 13. Obviously, preferably, the linearized axis 15 is different from the flip axis X. Even more preferably, the linearized axis 15 is perpendicular to the flip axis X or, in any case, transverse to the flip axis X. A rod 27 may be provided between the articulated arm 11 and the frame 13, preferably of the type with a mechanical rotating buckle (or may be a similar hydraulic device), which is configured to adjust the traction of the plow.

[0034] Still referencing Figure 1 In a highly preferred example, two or more rows of opposing tillage elements 26 are mounted on frame 13. The working width L of the tillage elements is adjusted in some embodiments by means of an adjusting actuator 16, which is used to change the working width L between consecutive tillage elements 26 between a minimum and a maximum position, preferably continuously. The actuator 16 is preferably of the type with a hydraulic jack, but different methods, such as electromechanical methods, can also be provided to enable the actuator to be actuated.

[0035] In a preferred embodiment, the linearizing actuator 12 is actuated by pressurized fluid, the flow of which can be intercepted by valve 17. Figure 2As can be clearly seen, the linearization of the frame actuated by the linearization actuator remains constant as the frame rotates about the flip axis X. Advantageously, the valve 17 is actuated according to the relative angular position of the frame 13 with respect to the individual flip axis X; that is, advantageously, the valve is actuated according to the angular position of the frame 13 about the flip axis X, which preferably defines a relative rotation angle R. Therefore, in a preferred embodiment, the plow of the present invention includes a flow rectifying device 17A configured to actuate the valve 17 according to the aforementioned angular position, i.e., according to the rotation angle R of the frame 13 about the flip axis X, preferably selectively intercepting or allowing the flow of fluid.

[0036] It can be noted that in some embodiments, the rectifier 17A is configured to actuate the valve 17 solely based on the rotation angle R of the frame 13 about the flip axis X. In other words, in some embodiments, the valve 17 cannot be actuated by the rectifier 17A based on a variable independent of the rotation angle R, such as the position of the frame 13 relative to the flip device 4 about the linearization axis 15.

[0037] It will be understood that, in some implementations, the interceptor valve 17 may be activated by mechanical, hydraulic, pneumatic, electrical, electronic means or by gravity.

[0038] In some embodiments, the rectifier 17A is mechanical, and may include, for example, a switch 18 mounted on a valve, which preferably engages with an abutment portion 19 of a toggling device to close or open the valve based on the position of the actuator with switch 18 relative to the abutment portion 19. For this purpose, the abutment portion 19 may be configured to abut the switch 18, thereby actuating the rectifier 17A according to a rotation angle R. Therefore, it is evident that the switch 18 advantageously functions as a probe or transmission member relative to the abutment portion 19.

[0039] It must be observed that, in the implementation, the interceptor valve 17 is of the "normally open" type, meaning that when the switch 18 is not actuated, the valve 17 allows the flow of pressurized fluid to reach the linearization actuator 12. Therefore, preferably, the abutment portion 19 is configured to abut the switch 18 during the flipping of the frame 13 in order to block the flow of oil to the linearization actuator 12.

[0040] In another embodiment, the interceptor valve 17 is of the "normally closed" type, meaning that when the switch 18 is not actuated, the valve 17 will intercept the flow of pressurized fluid toward the linearizing actuator 12. In this case, preferably, the abutment portion 19 is configured to abut the switch 18 in the operating state to allow oil flow to the linearizing actuator 12, while the abutment portion is configured not to abut the switch 18 during the flipping of the frame 13 to block the flow of oil to the linearizing actuator 12.

[0041] According to another aspect of the invention, a valve 17 with an associated switch 18 is fixed to a cylinder 61 by a support 70. The valve is adjustable along its position on the cylinder 61, preferably by acting on a pair of clamping rings 72. In this way, the user can adjust the position of the valve 17 according to the working state or as needed to take up any mechanical assembly play that occurs in the linearization and reversing linkage of the plow.

[0042] Preferably, the abutment portion 19 is eccentric relative to the flipping axis X. In some embodiments, the abutment portion 19 is fastened to the main pin 3 of the flipping device. However, in other embodiments, the abutment portion 19 is movably connected to the main pin 3, preferably at an eccentric position relative to the flipping axis X.

[0043] In some embodiments, the abutment portion 19 is formed by a rod 19A.

[0044] One end of rod 19A is preferably fastened in a pivotable manner about the axis Y of pin 22, such as, for example Figure 3 shown.

[0045] Advantageously, the end of rod 19A is pivotally fixed to the flipping device 4 about an axis Y, which is the same axis around which the end of the flipping actuator 6 is pivotally secured.

[0046] It must be observed that, in one respect, axis Y is parallel to and spaced apart from the flipping axis X. Therefore, it is advantageous that rod 19A is hinged to the flipping device 4 at an eccentric position relative to the flipping axis X.

[0047] During the flipping of frame 13, rod 19A is advantageously held in a parallel state relative to flipping actuator 6 by guide 71, which is fixedly engaged with support 70. Furthermore, guide 71 restricts buckling of rod 19A due to the force applied by switch 18 in contact with rod itself.

[0048] In a preferred embodiment, the abutting end of the lever 19A opposite to the flipping device 4 includes at least one portion 20, which is inclined or bent, and is configured to progressively press the switch 18 or progressively disengage from the switch 18 as the valve 17 moves toward or away from the lever 19A.

[0049] In a preferred embodiment, the lever 19A provides a straight portion 19B that extends parallel to the sliding direction of the flip actuator 6, such as, for example... Figure 5 As shown. Preferably, the straight portion 19B of the rod 19A is positioned at an intermediate position between the abutting end of the rod and the pivotally fastened end of the rod about the axis Y.

[0050] Advantageously, the rod 19A provides a curved portion 19C that can connect the straight portion of the rod to the end of the rod that is pivotally secured about the axis Y.

[0051] Preferably, the straight portion 19B of the lever 19A provides a surface 19D that is substantially flat and is used to hold the switch 18 in the pressed state during rotation of the frame 13 about the flip axis X.

[0052] Special reference Figure 3 , Figure 5 , Figure 7 and Figure 9 In the embodiment shown, the relative angular position of the frame 13 around the flip axis X is defined by a rotation angle R, which varies from 0° to a flip angle Z (not illustrated in the figure), so that the rows of tillage elements 26 work alternately in the land to be tilled.

[0053] Preferably, the flip angle Z is between 160° and 200°. More preferably, the flip angle Z is between 170° and 190°. In a preferred embodiment, the flip angle Z is 180°.

[0054] According to one aspect of the invention, the position of the interceptor valve 17 relative to the rod 19A is selected such that the linearization of the frame 13 is maintained constant by the valve 17 for a predetermined range of values ​​of the rotation angle R (wherein applicable and adjustable). In practice, the support 70, fixed along the cylinder 61, allows adjustment of the intercept angle I (not illustrated in the figures), that is, allows adjustment of the rotation angle R of the valve 17 to intercept the flow of pressurized fluid.

[0055] This system allows us to ensure that, during the rotational phase of the plow, the position of the articulated arm 11 remains advantageously unchanged as the rotation angle R is changed by the reversing actuator 6. This is because, preferably, the angle A formed between the articulated arm 11 and the reversing axis X remains constant, since the valve 17 intercepts the flow of pressurized oil supplied to the linearizing actuator 12, preventing any leakage in the oil circuit or reverse pressure from undesirably altering the extension of the linearizing actuator 12.

[0056] In another possible configuration not illustrated, valve 17 and rod 19A may be mounted on the tilting actuator 6 and the tilting device 4, respectively.

[0057] Figure 3 , Figure 5 , Figure 7 and Figure 9 The example illustrates the continuous steps of plow rotation, where the rotation angle R gradually changes from a value approximately equal to or slightly less than the intercept angle I to a value approximately equal to or slightly greater than (ZI). Figure 4 , Figure 6 , Figure 8 and Figure 10 The examples still illustrate the differences between the two scenarios. Figure 3 , Figure 5 , Figure 7 and Figure 9 The position of switch 18 relative to lever 19A during the illustrated plow-turning step.

[0058] According to another aspect of the invention, the flipping step of the plow 1—moving one or the other of the two rows of tillage elements 26 to the operating tillage position—is preceded by a linearization step in which the linearization actuator 12 presses against the frame 13, causing the hinge arm 11 to rotate about the hinge axis 14.

[0059] When the linearizing actuator 12 has reached its maximum extension or other desired extension, a flipping step is performed, wherein the flipping actuator 6 presses against the actuator arm 9. The flipping actuator 6 is preferably rotatably secured to pin 21, which is fixedly engaged with the spindle housing 8. Actuation of the flipping actuator 6 causes the plow frame 13 to rotate about the flipping axis X. Due to the rotation of the flipping device 4, the switch 18 is moved translationally on the rod 19A. When the rotation angle R of the frame 13 about the axis X reaches the intercept angle I, the switch 18 advantageously closes the valve 17 completely, thereby interrupting the flow of pressurized oil to the linearizing actuator 12. At this point, preferably, the flipping actuator 6 continues to press against the actuator arm 9, allowing the plow to continue rotating until the flip angle Z is reached. During the tillage rotation from the rotation angle R corresponding to the intercept angle 1 to the rotation angle R' corresponding to the angle (ZI), valve 17 is advantageously kept closed at all times, and the linearization actuator 12 maintains the initial linearization achieved before valve 17 is closed. Preferably, valve 17 reopens from the rotation angle R' of (ZI) to the flow of pressurized oil to the linearization actuator 12, allowing the linearization actuator 12 to bring the frame 13 back to the desired operating position. The tillage rotation is completed when a rotation equal to the rotation angle Z about the axis X is achieved, thereby allowing the rows of tillage elements 26 to work alternately in the land to be tilled.

[0060] Preferably, the interception angle I is between 2° and 30°. More preferably, the angle I is between 5° and 15°. Even more preferably, the angle I is 10°.

[0061] refer to Figure 1 As will be understood from the illustrated embodiments, front portions 2F and 3F, pointing in the opposite direction to the frame 13, can be defined on the attachment member 2 and the main pin 3, respectively. In one aspect, a rear portion 2R can be defined on the side of the attachment member 2 facing the frame 13, and a front portion 2F, preferably pointing towards the traction machine, can be defined on the attachment member 2 opposite to the rear portion 2R. Similarly, a rear portion 3R can be defined on the side of the main pin 3 facing the frame 13, and a front portion 3F, opposite to the rear portion 3R, can be defined on the main pin 3.

[0062] exist Figure 11 and Figure 12 The image shows the front portion 2F of the attachment member 2 and the front portion 3F of the main pin 3 according to a second embodiment of the present invention.

[0063] exist Figure 11 and Figure 12In the illustrated embodiment, the flipping device 4 (partially concealed by the attachment member 2) is mounted on the master pin 3. The master pin 3 is preferably rotatably fastened to the attachment member 2 or the spindle housing 8 about the flipping axis X. Advantageously, the switch 18 and the abutment portion 19 are mounted on the attachment member 2 or the spindle housing 8 and the master pin 3, respectively. In a preferred embodiment, the abutment portion 19 is a plate, preferably made of metal. Preferably, the plate can be a flange element. In a preferred embodiment, a hole 19E is defined in the abutment portion 19, which is configured to receive the front portion 3F of the master pin 3 and allow for a stable connection of the front portion, advantageously allowing the portion 19 and the master pin 3 to be rotatably fastened. Advantageously, the switch 18 and the abutment portion 19 are mounted on the front portion 2F of the attachment member 2 and the front portion 3F of the master pin 3, respectively. Since the front portion 3F of the master pin 3 is adjacent to the front portion 2F of the attachment member 2, the switch 18 and the abutment portion 19 can contact each other. Preferably, the valve 17, which has a rectifier 17A, is also mounted together with the switch 18 on the front portion 2F of the attachment member 2.

[0064] In one aspect, the switch 18 is fastened to the attachment member 2 at the periphery of the bushing 5, or more generally at the periphery of the kingpin 3, preferably at a distal position relative to the ground, thereby limiting exposure to accidental impacts and mud. Advantageously, the distal position is the area that, during use, is located diametrically opposite to the ground relative to the axis of rotation of the pin. Even more preferably, the switch 18 is inserted between two reinforcing wings 81 of the spindle housing 8, which are perpendicular to the ground, so as to shield against lateral impacts by the wings 81 themselves.

[0065] Advantageously, a protective plate 17B is provided to be mounted on the rectifier 17A. Preferably, the protective plate 17B is mounted at a distal position relative to the ground to protect the valve 17 and / or switch 18 from accidental impacts from above. Even more preferably, the protective plate 17B includes lateral wings 17C extending on both sides of the interceptor valve 17 to protect the hydraulic connection 17D of the pressurized fluid circuit introduced into and discharged from the valve itself.

[0066] According to another advantageous aspect, the abutment portion 19 extends from the front portion 3F of the main pin 3 in a generally radial direction. Therefore, advantageously, the abutment portion 19 is eccentric relative to the rotation axis X. In this way, the switch 18 and the abutment portion 19 can come into contact with each other according to the rotation angle R of the main pin 3 relative to the rotation axis X.

[0067] In a preferred embodiment, the abutment portion 19 includes a substantially flat surface 19D, which is configured to retain the switch 18 pressed during rotation of the flipping device 4 about the flipping axis X. Figure 12As shown. Advantageously, for this purpose, the substantially flat surface 19D can extend in a plane substantially perpendicular to the axis of rotation of pin 3.

[0068] Advantageously, the abutment portion 19 includes at least one portion 20, which is inclined or curved and configured to progressively press the switch 18 or progressively disengage from the switch 18 as the abutment portion 19 moves toward or away from the switch, such as... Figure 11 As shown in the diagram. It can be noted that the portion 20 is advantageously inclined or bent along the path of the switch 18 that contacts the abutment portion 19. Furthermore, it will be understood that, advantageously, the portion 20 is inclined or bent relative to the substantially flat surface 19D. According to another advantageous aspect, the inclined or bent portion 20 points in the opposite direction to the frame 13. This arrangement allows the switch 18 to be progressively pressed as it slides on the portion 20, thereby moving towards the surface 19D, and vice versa, allowing the switch 18 to be progressively disengaged as it slides on the portion 20, thereby moving away from the surface 19D. Preferably, the portion 20 is connected to the surface 19D in the region of a bend line 20A, which extends in a generally radial direction relative to the master pin 3. Even more preferably, the angle of inclination of the portion 20 relative to the surface 19D refers to the bend line 20A. In one aspect, the portion 20 is constructed by bending along the bend line 20A along the peripheral edge of the abutment portion 19. In some embodiments, the portion 20 is curved so that it engages with the surface 19D without any interruption in continuity. This arrangement prevents sudden mechanical stress from being generated in the switch as it slides between the surface 19D and the portion 20.

[0069] In a preferred embodiment, the surface 19D of the abutment portion 19 extends along a circumferential arc around the flipping axis X or around the master pin 3. Preferably, at both ends of this arc, the abutment portion 19 terminates with corresponding opposite portions 20. These two portions 20 are configured to press the switch 18 and disengage the switch when the rotating device 4 rotates in a first rotational direction and when the rotating device rotates in a second rotational direction opposite to the first rotational direction. Particularly preferably, the first portion 20 is configured to press the switch 18 when the flipping device 4 rotates in the first rotational direction and disengage from the switch 18 when the flipping device 4 rotates in the second rotational direction. Conversely, the second portion 20, opposite to the first portion 20, is preferably configured to press the switch 18 when the flipping device 4 rotates in the second rotational direction and disengage from the switch 18 when the flipping device 4 rotates in the first rotational direction.

[0070] Therefore, the present invention solves the problems mentioned above, while achieving several advantages, including:

[0071] • The complexity of the device for intercepting the flow of pressurized fluid toward the linearization actuator can be reduced, thereby reducing the cost of the device.

[0072] • It eliminates any possible movable connecting elements between the overturning device and the frame, eliminates any mechanical downtime that needs to be addressed, and eliminates potential wear and malfunctions caused by component damage that could compromise the structural integrity of the plow.

Claims

1. An mounted reversible tillage plow (1), the tillage plow comprising: Attachment components (2) for traction machines; A flipping device (4) hinged to the attachment member (2) about a flipping axis (X); a flipping actuator (6) located between the attachment member (2) and the flipping device (4); a frame (13) carrying a tillage element (26) that operates alternately according to the position of the flipping device (4) about the flipping axis (X), the flipping device (4) including a linearizing actuator (12) actuated by a pressurized fluid whose flow can be intercepted by a interception valve (17), the tillage being characterized in that the tillage includes a rectifier (17A) of the interception valve (17), the rectifier (17A) being configured to actuate the interception valve (17) to selectively intercept or allow the flow of the pressurized fluid according to the rotation angle (R) of the frame (13) about the flipping axis (X).

2. The plow (1) according to claim 1, wherein, The interceptor valve (17) is actuated by the abutting portion (19) of the flipping device (4) according to the rotation angle (R).

3. The plow (1) according to claim 2, wherein, The abutting portion (19) is eccentric relative to the flipping axis (X).

4. The plow (1) according to claim 1, wherein, The frame (13) is fastened to the flipping device (4) by the linearization actuator (12) and the hinge arm (11) of the frame (13).

5. The plow (1) according to claim 4, wherein, The hinge arm (11) is hinged to the frame (13) at a first end about a linearized axis (15) of the frame (13), and the hinge arm is hinged to the flipping device (4) at the opposite second end about a hinge axis (14).

6. The plow (1) according to any one of claims 1 to 5, wherein, The intercept valve (17) is configured to intercept the flow of pressurized fluid when the frame (13) is rotated about the flip axis (X) so that the linearization of the frame (13) actuated by the linearization actuator (12) remains constant.

7. The plow (1) according to any one of claims 1 to 5, wherein, When the value of the rotation angle (R) of the frame (13) about the flip axis (X) is between 2° and 30°, the intercept valve (17) intercepts the flow of the pressurized fluid toward the linearization actuator (12).

8. The plow (1) according to any one of claims 1 to 5, wherein, When the value of the rotation angle (R) of the frame (13) around the flip axis (X) is between 5° and 15°, the intercept valve (17) intercepts the flow of the pressurized fluid toward the linearization actuator (12).

9. The plow (1) according to any one of claims 1 to 5, wherein, When the value of the rotation angle (R) of the frame (13) around the flip axis (X) is 10°, the intercept valve (17) intercepts the flow of the pressurized fluid toward the linearization actuator (12).

10. The plow (1) according to claim 2 or 3, wherein, The interceptor valve (17) is actuated by a switch (18) and abutment portion (19), which are able to come into contact with each other according to the rotation angle (R).

11. The plow (1) according to claim 10, wherein, The switch (18) and the abutting part (19) are respectively installed on the flip actuator (6) and the flip device (4), or the switch (18) and the abutting part (19) are respectively installed on the flip device (4) and the flip actuator (6).

12. The plow (1) according to claim 11, wherein, The abutting portion is formed by a rod (19A) which includes an abutting end opposite to the flipping device (4) and includes at least one portion (20) that is inclined or curved and is configured to progressively press the switch (18) or progressively disengage from the switch as the interceptor valve (17) moves toward or away from the rod (19A).

13. The plow (1) according to claim 12, wherein, The end of the flipping actuator (6) and the end of the rod (19A) are fastened to the flipping device (4) in a manner that allows them to pivot about the same axis (Y).

14. The plow (1) according to claim 12 or 13, wherein, The rod (19A) provides a straight portion (19B) that extends parallel to the sliding direction of the flip actuator (6).

15. The plow (1) according to claim 2 or 3, wherein, The interceptor valve (17) is fixed to the flip actuator (6) in such a way that it can move away from the abutting portion (19) and toward the abutting portion.

16. The plow (1) according to claim 10, wherein, The flipping device (4) is mounted on the main pin (3), which is fastened to the attachment member (2) in a manner that allows it to rotate around the flipping axis (X). The switch (18) and the abutment portion (19) are respectively mounted on the attachment member (2) and the main pin (3).

17. The plow (1) according to claim 16, wherein, The attachment member (2) and the main pin (3) are defined with corresponding front portions (2F, 3F) pointing in the opposite direction to the frame (13), and the switch (18) and the abutment portion (19) are respectively mounted on the front portions of the attachment member (2) and the main pin (3).

18. The plow (1) according to claim 17, wherein, The abutting portion (19) extends from the front portion of the main pin (3) in a generally radial direction, and the abutting portion (19) includes at least one portion (20) that is inclined or curved and is configured to progressively press the switch (18) or progressively disengage from the switch as the abutting portion (19) moves toward or away from the switch.

19. The plow (1) according to claim 5, wherein, The hinge arm (11) and the linearizing actuator (12) form opposite sides of the hinged quadrilateral (10).

20. The plow (1) according to claim 19, wherein, The remaining sides of the hinged quadrilateral (10) are formed by the following: the flipping device (4) located between the hinge axis (14) and the rotatable fastening axis of the first end of the linearizing actuator (12) at the side pointing toward the flipping device (4); and the frame (13) located between the linearizing axis (15) and the rotatable fastening axis of the opposite second end of the linearizing actuator (12).

21. The plow (1) according to any one of claims 1 to 5, wherein, A control actuator (16) is provided for changing the working width (L) between consecutive tillage elements (26).

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