Device for moving a windrow laid on the ground

Abstract

Device for Moving a Windrow Placed on the Ground. The invention relates to a device (4) for moving a continuous longitudinal sheet (14) of plant stems placed on the ground (12), the device (4) being configured to move said continuous sheet, at least partially and preferably primarily, along a horizontal direction (T) perpendicular to the longitudinal direction (L) of said continuous sheet. The device (4) comprises attachment means (10) to a motorized vehicle (1), collection means (6) configured to pick up said continuous sheet from the ground, and a lateral movement means (8) for the picked-up continuous sheet, for example, extending at least along a longitudinal direction. The lateral movement means (8) extends, at least partially and preferably primarily, between the collection means (6) and the attachment means (10) to a motorized vehicle.The invention also relates to a motorized vehicle (1) comprising such a propulsion device (4). Figure for the abstract: Fig. 1.

Description

Title of the invention: Device for moving a windrow placed on the ground. Technical field

[0001] The present invention relates to the field of processing plant stems, such as flax or hemp. More specifically, the invention relates to the field of processing a continuous layer of plant stems laid on the ground. Previous technique

[0002] Flax is a fiber plant. To facilitate fiber extraction for use, particularly in the textile industry, flax stems undergo a retting process. This process requires that, during the flax harvest, after the stems have been pulled up, they be laid on the ground in the form of windrows, consisting of a continuous sheet of parallel stems aligned perpendicular to the direction of the pulling machine. The windrow is left in the field for a sufficient time to allow microorganisms present in the soil to biologically degrade the pectic cements that bind the fibers together. When this degradation is sufficient, the flax is collected for scutching, that is, for processing at an industrial site to extract and clean the fibers for use in the textile industry.

[0003] It is known to store and transport plant stems in the form of agricultural bales. Such bales allow for easier handling of plant stems, particularly a continuous sheet of plant stems, while also allowing them to be unrolled once at the destination site.

[0004] The production of an agricultural bale is achieved using a winder towed in the field by a motorized vehicle. The winder is thus configured to wind the continuous sheet of plant stems into a spiral, as said sheet is retrieved from the ground, in order to form the agricultural bale.

[0005] However, since such a winder is towed by a motorized vehicle, the latter may, when winding a continuous bale, drive over an adjacent continuous bale. Such contact of one or more wheels of the motorized vehicle over an adjacent continuous bale may then crush the plant stems, and thus damage them, or may mix them with the underlying soil or dust before winding, or may even disorganize the stems before winding. Such problems must be avoided, particularly to improve the winding of the agricultural bale and to limit dust accumulation. In particular, the presence of dust in the agricultural bale may lead, during the unwinding of the agricultural bale poses a risk of exposing operators to such dust.

[0006] It is thus known to offer offset winders. Unlike standard winders, which are positioned in line with the motorized vehicle that tows them, offset winders are offset laterally from the direction of travel of the motorized vehicle that tows them. It then becomes possible to collect a continuous swath of hay and wind it into agricultural bales, while limiting the risk of the motorized vehicle's wheels passing over the swath just before collection.

[0007] However, such offset winders are more expensive and, due to their lateral offset, more difficult to maneuver, particularly when turning. Furthermore, the lateral offset of such winders remains limited, so their use does not guarantee that the wheels of the motorized vehicle and the continuously winding web will not be in contact.

[0008] Furthermore, the lateral offset of such offset winders is generally only on one side, which can complicate the retrieval of the windrows at the field edges. In particular, if an obstacle prevents the motorized machine from traveling alongside a field edge, for example a hedge or a wall, it becomes more difficult to use the offset winder, unless the motorized machine is driven in the opposite direction, which would result in the continuous swath being wound into an inverted spiral, with regard to the position of the seed capsules at the ends of the stems. Description of the invention

[0009] The present invention aims to solve the various technical problems stated above. In particular, the present invention aims to provide a device connected to a motorized machine that facilitates the retrieval of a continuous sheet of plant stems from the ground, while limiting the risk of crushing said continuous sheet by said motorized machine. More specifically, the present invention aims to provide a device that facilitates the use of a baler while preserving quality plant stems in the agricultural bale.

[0010] Thus, according to one aspect, a device is proposed for moving a continuous longitudinal sheet of plant stems laid on the ground, the device being configured to move said continuous sheet, at least in part and preferably mainly, along a horizontal direction perpendicular to the longitudinal direction of said continuous sheet. The device includes means for attaching it to a motorized vehicle, means for collecting said continuous sheet from the ground, and a means for laterally moving said collected continuous sheet, for example, extending at least along a longitudinal direction. The means of Lateral displacement extends, at least in part and preferably mainly, between the means of collection and the means of attachment to a motorized vehicle.

[0011] Thus, the device according to the invention makes it possible to move laterally the swath intended to be collected and wound by a winder mounted at the rear of a motorized vehicle, so as to position it at the level of the track of said motorized vehicle, that is to say, at the level of the width between the two wheels of the same axle of the motorized vehicle. Such a device then makes it possible, on the one hand, to prevent the wheels of the motorized vehicle from rolling on the continuous swath to be wound or on an adjacent continuous swath, and on the other hand, to use a standard winder, that is to say, one mounted in line with the axis of the motorized vehicle. The movement device makes it possible, in particular, to move the continuous swath being collected away from the adjacent continuous swath or from any other obstacle that could prevent a motorized vehicle from moving, such as a hedge or a wall, so as to leave sufficient space between the two for the wheels of the motorized vehicle to pass.

[0012] The displacement device according to the present invention is mounted in particular at the front of the motorized machine, and thus allows the continuous swath intended to pass between the wheels of the motorized machine to be moved just before being picked up and wound by the winder. The motorized machine therefore does not crush or disturb the swath to be picked up or any swath adjacent to it. Furthermore, since the displacement device is mounted at the front of the motorized machine, it is easier to maneuver, even when laterally offset, than a towed, offset winder. Moreover, maneuvering the motorized machine is also facilitated by using a non-offset winder.

[0013] Finally, moving the windrow before collection also aerates it, shakes it lightly, and separates it from any weeds present, allowing dust to settle before it is rolled into a bale. This facilitates its recovery for bale production. It is then possible to obtain a bale with less dust inside, which also results in lower dust exposure for operators present during the subsequent unrolling of the bale.

[0014] In the direction of movement of the swath stalks, the lateral movement means is therefore mounted, at least partially and preferably primarily, downstream of the collection means and upstream of the attachment means. Furthermore, the motorized equipment is positioned downstream of the movement device and upstream of the winder.

[0015] Preferably, the collection means comprise a rotating pick-up equipped with metallic fingers, retractable or not.

[0016] The rotating pick-up allows the stems of the continuous sheet laid on the ground to be collected, while limiting dust accumulation. The presence of retractable metal fingers can facilitate the transfer of the collected stems from the pick-up to the belt of the lateral movement means and limit dust intake.

[0017] Preferably, the pickup means also include a wheel configured to roll on the upper surface of the continuous sheet, the pickup being mounted, preferably, sliding in height relative to said wheel, and the pickup being configured to rotate in a direction opposite to that of said wheel.

[0018] The pick-up can thus be preceded by a wheel which, during the movement of the transport device, rolls on the upper surface of the continuous sheet. Such a wheel makes it possible to maintain a constant gap between the pick-up and the continuous sheet, regardless of any irregularities in the ground on which the continuous sheet is laid. In particular, the gap can be adjusted by sliding the pick-up vertically relative to said wheel.

[0019] Preferably, the lateral movement means comprises one or more belts, preferably equipped with studs, extending between a front cylinder positioned near the pickup means or forming part of the pickup means, and a rear cylinder positioned near the attachment means or forming part of the attachment means, the front and rear cylinders for the same belt being parallel.

[0020] In order to move the stalks picked up by the pickup, the lateral movement means comprises one or more belts extending between two end rollers and rotating around said rollers. The belt(s) are specifically oriented to transport the stalks from the pickup to the track of the motorized vehicle, at which point the stalks are released onto the ground.

[0021] According to one embodiment, the lateral displacement means is configured to allow lateral displacement of the front cylinder relative to the rear cylinder so as to obtain an angle between the longitudinal direction of the lateral displacement means and the longitudinal direction of the continuous sheet.

[0022] In such an embodiment, the lateral inclination of the displacement device is obtained by lateral displacement of the front cylinder: a means of lateral displacement is then obtained whose longitudinal direction extends substantially horizontally, with an angle with respect to the longitudinal direction of displacement of the motorized vehicle.

[0023] Preferably, the attachment means are configured to allow the device to be mounted on the front of a motorized vehicle, for example a tractor.

[0024] The fastening means are configured to adapt to the various systems present on motorized vehicles capable of moving the displacement device according to the invention, and a winder. Since the displacement device is intended to be mounted at the front, the fastening means are configured accordingly.

[0025] According to another embodiment, the attachment means are configured to allow rotation of the displacement device relative to the motorized vehicle, around a vertical axis, so as to obtain an angle between the longitudinal direction of the lateral displacement means and the longitudinal direction of the continuous sheet.

[0026] In such an embodiment, the lateral displacement means retains its geometry but is pivoted relative to the motorized vehicle, in order to allow an angle between its longitudinal direction and that of said motorized vehicle.

[0027] According to another aspect, a motorized machine, for example an agricultural machine such as a tractor, is also proposed, comprising a displacement device as described above, the displacement device being mounted, by the attachment means, at the front of the motorized machine, preferably in a vertical plane passing substantially through the center of a front axle of the motorized machine, so as to prevent the wheels of the motorized machine from crushing the plant stems.

[0028] Preferably, the device is configured to position, by lateral movement, the continuous sheet at the level of the track of the motorized vehicle, that is to say between the wheels of the same axle of the motorized vehicle.

[0029] Preferably, the motorized machine also includes a device for winding the continuous sheet into a ball, said winding device being mounted at the rear of the motorized machine and positioned in the axis of the motorized machine.

[0030] The machine can then easily and efficiently use a standard, non-offset winder to retrieve and wind the continuous swath that has been previously shifted laterally by the displacement device.

[0031] Preferably, the pick-up of the displacement device, and possibly the belt(s) of the lateral displacement means, is driven in rotation at the same angular velocity as the wheels of the motorized vehicle.

[0032] Such synchronization of the rotational speeds of the means of the lateral displacement device and the tractor wheels makes it possible to have a continuous slab processing speed that is the same along the entire length of the motorized machine. Such synchronization can be achieved, in particular, by connecting the pick-up and / or the belt(s) of the displacement device to drive means of the motorized machine, which are synchronized with the travel speed of said motorized machine. Brief description of the drawings

[0033] [Fig-1] Fig. 1 represents, schematically, a motorized vehicle equipped of a winder at the rear, and of a displacement device according to the present invention at the front, seen from the side;

[0034] [Fig.2] Fig.2 schematically represents the motorized vehicle of Fig.1, seen from above, with a displacement device according to a first embodiment;

[0035] [Fig.3] Fig.3 schematically represents the motorized vehicle of the [Fig.l], seen from above, with a displacement device according to a second embodiment;

[0036] [Fig.4] The [Fig.4] schematically represents the motorized vehicle of the [Fig.1], with the movement device in the raised position; and

[0037] [Fig. 5] Fig. 5 schematically represents a motorized vehicle equipped of a winder at the rear, and of a displacement device according to a variant embodiment of the invention at the front, seen from the side. Description of the implementation methods

[0038] Fig. 1 schematically illustrates an example of a motorized machine 1 with a winder 2 mounted, not offset, at the rear of the motorized machine 1, and a device 4 for moving a continuous sheet according to the present invention, mounted at the front of the motorized machine.

[0039] As illustrated in Figures 1 and 4, the device 4 for moving a continuous sheet is pushed by the motorized vehicle 1 on the front of which it is mounted. The device 4 for moving a continuous sheet comprises, successively, from front to rear, collection means 6, a lateral movement means 8, and attachment means 10.

[0040] The collection means 6 allow a continuous sheet 14 of stalks constituting the windrow to be taken from the ground 12. The continuous sheet 14 rests on the ground in particular along a longitudinal horizontal direction L along which the motorized vehicle 1 moves. The lateral movement means 8 is adapted to translate said continuous sheet 14 laterally in a horizontal plane, the continuous sheet then being positioned at the level of the track of the motorized vehicle at the end of the lateral movement. More precisely, the continuous sheet 14 is moved, at least in part, in a transverse horizontal direction T perpendicular to the longitudinal direction L. Once the continuous sheet is positioned in the track of the motorized vehicle 1, the vehicle can move over it, without driving over it, and the winder 2 can then collect and wind the continuous sheet 14 into an agricultural bale.All of these operations of collection, lateral movement along the transverse direction T and winding into agricultural bales, are carried out continuously during the movement, along the longitudinal direction L, of the machine 1 pushing the lateral movement device 4 and pulling the winder 2.

[0041] According to the preferred embodiment illustrated, the collection means 6 comprise a pick-up 16 equipped with metal fingers 18, which may or may not be retractable. The pick-up 16 rotates on itself in a direction opposite to the direction of rotation of the wheels of the machine 1, so that the metal fingers 18, coming into contact with the continuous sheet 14, lift it and cause it to rotate on the surface as shown in the illustration. [Fig. 1]. The collection means 6 may also include a wheel (not shown) preceding the pick-up 16 and which, when the machine 1 is moving, rolls on the upper surface of the continuous sheet 14. This wheel, on which the height-adjustable pick-up 16 is mounted, makes it possible to maintain a constant distance between the pick-up 16 and the continuous sheet 14, regardless of the irregularities of the ground 12.

[0042] According to a first embodiment illustrated in Figures 1 and 4, the drive means 8 consists of a belt 20 equipped with prongs, which is stretched between a front cylinder 22 and a rear cylinder 24, along a longitudinal direction. The longitudinal direction of the belt is substantially the longitudinal direction of the drive means 8, and, as explained below, has an angle α (alpha) with the longitudinal direction L of the continuous web 14. The front cylinder 22 is associated with the pick-up 16 such that the web 14 picked up by the fingers 18 of the pick-up is driven along the belt 20 by the prongs, and more particularly by the prongs of a lower strand of the belt 20.The rear cylinder 24 is positioned on the side of the attachment means 10, and close to the ground 12, so that the web driven by the lugs of the belt 20 and moved laterally is deposited on the ground 12 as close as possible to it, in order to avoid any disturbance. The front cylinder 22 and the rear cylinder 24 are positioned parallel to each other, in a substantially horizontal direction, so that the belt 20 can be tensioned between them and so that the laterally displaced rods remain substantially in a plane with a horizontal direction during their movement from front to back.

[0043] Once the sheet 14 has been placed on the ground 12, at the level of the track of the motorized vehicle 1, the latter can then drive over it, without the wheels crushing it, then the winder 2 retrieves and winds the sheet 14 in a spiral in order to form an agricultural bale.

[0044] Fig. 2 illustrates a first embodiment of the means of movement 8. In this first embodiment, the angle α (alpha) between the longitudinal direction of the means of movement 8 and the longitudinal direction L of the continuous sheet 14 is obtained by pivoting the belt 20 and the front and rear cylinders 22, 24 around a vertical axis located at or near the attachment means 10.

[0045] More specifically, the front and rear cylinders 22, 24, and the belt 20 have a generally rectangular shape, the length of which corresponds to the distance between the two cylinders 22, 24 and extends along the longitudinal direction of the means of movement 8. In order to position the collection means 6 opposite the continuous sheet 14, that is to say, laterally offset with respect to the axis of movement of the motorized vehicle 1 and therefore with respect to the attachment means 10, the cylinders 22, 24 and belt 20 are mounted pivoting around a vertical axis located, preferably, at the level of the attachment means 10, for example at the level of the connection between the means of movement 8 and the attachment means 10 or at the level of the connection between the attachment means 10 and the motorized machine 1.

[0046] It is then sufficient to rotate the cylinders 22, 24 and the belt 20 by an appropriate angle a (alpha) to allow the positioning of the pickup means 6 in relation to the continuous sheet 14.

[0047] Such an embodiment leads in particular to having collection means 6 which are inclined at an angle a (alpha) with respect to the transverse direction T, and therefore inclined with respect to the longitudinal direction L of the continuous sheet 14. In particular, the cylinders 22, 24 are inclined with respect to the transverse direction T. Nevertheless, the rods can still be collected, moved and then deposited at the level of the track of the motorized vehicle 1 so as to allow their recovery by the winder 2 in a second step.

[0048] Such an embodiment therefore makes it possible to position the collection means 6 on one side or the other of the motorized vehicle 1, in order to move laterally a continuous sheet 14 located on one side or the other of the motorized vehicle 1.

[0049] Fig. 3 illustrates a second embodiment of the means of movement 8. In this second embodiment, the angle a (alpha) between the longitudinal direction of the means of movement 8 and the longitudinal direction L of the continuous sheet 14 is obtained by lateral deformation of the structure formed by the belt 20 and the front and rear cylinders 22, 24.

[0050] More specifically, the means of movement 8 may comprise two lateral assemblies, each formed by a belt 20 mounted between two corresponding cylinders 22, 24. The two assemblies are positioned side by side so that the belts 20 remain adjacent to each other. However, and as in the first embodiment illustrated in [Fig. 2], each assembly is mounted to pivot about a vertical axis, the two vertical axes being offset from each other by the distance separating the two belts 20. Thus, the simultaneous rotation of the two assemblies will result in front cylinders 22 oriented in parallel but different directions, and rear cylinders 24 oriented in parallel but different directions.

[0051] In this case, the pivoting of the two assemblies will lead to a lateral displacement of the collection means 6, which will nevertheless remain parallel to the transverse direction T and therefore perpendicular to the longitudinal direction L of the continuous sheet 14, that is to say, to obtain a means of displacement 8 in the form of a deformable parallelogram.

[0052] Such a second embodiment therefore also allows the collection means 6 to be positioned on one side or the other of the motorized vehicle 1, in order to move laterally a continuous sheet 14 located on one side or the other of the motorized vehicle 1.

[0053] As can be seen in Figures 2 and 3, the movement device 4 allows the motorized vehicle 1 to move alongside the adjacent continuous sheet, without driving over it, while simultaneously passing the continuous sheet being collected at the level of the motorized vehicle 1's track, thus preventing the motorized vehicle 1 from driving over it and allowing it to be collected by a standard winder mounted in the axis of the vehicle 1. The movement device 4 thus makes it possible to move the continuous sheet being collected away from the adjacent continuous sheet, so as to leave sufficient space between the two for the passage of the wheels of the motorized vehicle 1.

[0054] Such a relocation of the continuous sheet can also be advantageous when it is located not next to an adjacent continuous sheet, but along an area inaccessible to the motorized vehicle 1, such as a hedge or a wall. The relocation device 4 then makes it possible to free up sufficient space between the continuous sheet to be collected and the inaccessible area to allow the motorized vehicle to move around without damaging the continuous sheet being collected.

[0055] Finally, it is also possible to have a lifting means (not shown) mounted at the attachment points 10. The lifting means can thus be configured to raise or lower the displacement device 4 relative to the ground 12, to allow or prevent the continuous sheet from being moved. Thus, and as illustrated in [Fig. 4], the lifting means can raise the displacement device 4 above the ground 12 when it is not needed. Such a configuration is particularly useful at the end of a continuous sheet, when the motorized vehicle needs to maneuver, for example, to turn around, to position itself in line with the axis of the next continuous sheet: raising the displacement device 4 then facilitates such maneuvers without disrupting the beginning of the next continuous sheet to be retrieved.

[0056] The control of the lifting means of the displacement device 4 can in particular be carried out from the driver's cab of the motorized vehicle 1.

[0057] Figure 5 illustrates a second variant of the continuous sheet lateral displacement device according to the present invention.

[0058] According to this second variant illustrated in [Fig. 5], the lateral displacement means 8 comprises, or is constituted by, two belts 20a, 20b each stretched between a front cylinder 22a, 22b and a rear cylinder 24a, 24b in a longitudinal direction. The assembly formed by the belt 20a and the two cylinders 22a, 24a is arranged above the assembly formed by the belt 20b and the two cylinders 22a, 24a, so that the lower strand of belt 20a comes opposite the upper strand of belt 20b.

[0059] The longitudinal direction of the belts 20a, 20b is substantially the longitudinal direction of the lateral displacement means 8, and has, as explained above, an angle α (alpha) with the longitudinal direction L of the continuous web 14. The front cylinder 22b is associated with, or even forms part of, the pick-up 16 such that the belt 20b drives the pick-up 16 and such that the web 14 picked up by the fingers 18 of the pick-up is pinched between the upper strand of the belt 20b and the lower strand of the belt 20a, and then driven in the direction of the attachment means. The rear cylinders 24a, 20b are arranged on the side of the attachment means 10, and close to the ground 12, so that the sheet driven by the strands of the belts 20a, 20b and moved laterally, is deposited on the ground 12 as close as possible to it, so as to avoid any disturbance.The front cylinders 22a, 22b and the rear cylinders 24a, 24b are positioned parallel, in a substantially horizontal direction, so that the belts 20a, 20b can be tensioned between them and so that the laterally displaced rods remain substantially in a plane with a horizontal direction, during their movement from front to back.

[0060] As explained previously for the first variant, the angle a (alpha) between the longitudinal direction of the lateral displacement means 8 and the longitudinal direction L of the continuous sheet 14 can be obtained by pivoting the belts 20a, 20b and the front and rear cylinders 22a, 22b, 24a, 24b around a vertical axis located at or near the attachment means 10, or by lateral deformation of the structure formed by the belts 20a, 20b and the front and rear cylinders 22a, 22b, 24a, 24b.

[0061] Thus, thanks to the continuous stalk lateral displacement device according to the present invention, it becomes possible to retrieve a continuous stalk of stalks with a winder mounted on the axis of travel of the motorized vehicle, without having to drive over the continuous stalk or an adjacent continuous stalk beforehand. It is then easier to maneuver the motorized vehicle, and the agricultural bales obtained at the winder's output are of better quality, with less dust and less disordered stalks.

Claims

Demands

1. Device (4) for moving a continuous longitudinal sheet (14) of plant stems arranged on the ground (12), the device (4) being configured to move said continuous sheet (14), at least in part and preferably mainly, in a horizontal direction perpendicular (T) to the longitudinal direction (L) of said continuous sheet (14), in which the device (4) comprises means for attaching (10) to a motorized vehicle (1), means for collecting (6) configured to collect said continuous sheet from the ground, and a means for laterally moving said collected continuous sheet, for example extending at least in a longitudinal direction, in which the means for lateral movement (8) extends, at least in part and preferably mainly, between the means for collecting (6) and the means for attaching (10) to a motorized vehicle (1),in which the attachment means (10) are configured to allow the device (4) to be mounted on the front of a motorized vehicle (1), and in which the lateral movement means (8) is oriented to transport the rods from the collection means (6) to the track of the motorized vehicle, i.e. between the wheels of the same axle of the motorized vehicle, at which point the rods are released onto the ground.

2. Device (4) according to claim 1, wherein the pickup means (6) comprise a rotating pick-up (16) equipped with retractable or non-retractable metal fingers (18).

3. Device (4) according to the preceding claim, wherein the pickup means (6) also include a wheel configured to roll on the upper surface of the continuous sheet (14), the pick-up (16) being mounted, preferably, sliding vertically relative to said wheel, and wherein the pick-up (16) is configured to rotate in a direction opposite to that of said wheel.

4. A device (4) according to any one of the preceding claims, wherein the lateral displacement means (8) comprises one or more belts (20, 20a, 20b), preferably having prongs, extending between a front cylinder (22, 22a, 22b) positioned near the pickup means (6) or forming part of the pickup means (6), and a rear cylinder (24, 24a, 24b) positioned at proximity of the fastening means (10) or forming part of the fastening means (10), the front and rear cylinders for the same belt being parallel.

5. Device (4) according to the preceding claim, wherein the lateral displacement means (8) is configured to permit lateral displacement of the front cylinder (22, 22a, 22b) relative to the rear cylinder (24, 24a, 24b) so as to obtain an angle (a) between the longitudinal direction of the lateral displacement means (8) and the longitudinal direction (L) of the continuous sheet (14).

6. Device (4) according to any one of the preceding claims, wherein the attachment means (10) are configured to permit rotation of the displacement device (4) relative to the motorized machine (1), around a vertical axis, so as to obtain an angle (a) between the longitudinal direction of the lateral displacement means (8) and the longitudinal direction (L) of the continuous sheet (14).

7. Motorized machine (1), for example agricultural machine such as a tractor, comprising a displacement device (4) according to any one of the preceding claims, the displacement device (4) being mounted, by means of attachment (10), at the front of the motorized machine (1), preferably in a vertical plane passing substantially through the center of a front axle of the motorized machine, so as to prevent the wheels of the motorized machine (1) from crushing the plant stems.

8. Motorized machine according to the preceding claim, also comprising a device (2) for winding the continuous sheet into a ball, said winding device (2) being mounted at the rear of the motorized machine (1) and positioned in the axis of the motorized machine (1).