Haymaking machine with conveyors and operating method

Abstract

Haymaking machine comprising two conveyors, each configured to move a product in a transverse conveying direction to the direction of travel, in a first or second conveying direction, and to be driven at a respective speed. At least one conveyor can be moved substantially along the conveying direction, so that the conveyors can be placed in at least one lateral configuration, in which the product is deposited by a downstream conveyor, and in a central configuration. When the conveyors are placed in the lateral configuration, the speed of at least one of the conveyors is automatically adjusted so that the speed of the downstream conveyor is greater than that of the other conveyor(s). Figure to be published with the abbreviation: Fig. 1

Description

Title of the invention: Haymaking machine with conveyors and operating method

[0001] The invention relates to the field of agricultural machinery and concerns an agricultural haymaking machine, and more particularly a machine equipped with at least two transverse displacement conveyors of a plant product.

[0002] The innovation relates more particularly to an agricultural haymaking machine intended to be moved in a forward direction and comprising at least two conveyors, each configured to move a product in a conveying direction oriented transversely to the forward direction, capable of moving the product at will in a first conveying direction and / or in a second conveying direction, and capable of being driven at a respective speed, at least one conveyor being able to be moved substantially along the conveying direction, so that the conveyors can be placed in at least one lateral configuration, in which all the conveyors are joined, the conveying directions of all the conveyors are identical, and in which the product is deposited by a downstream conveyor, the conveyors also being able to be placed in a central configuration.

[0003] The machine described in document US8833044A1 corresponds to the above description. However, this machine has a drawback when the conveyors are in a lateral configuration: the downstream conveyor receives product not only from the associated transfer device, but also from the upstream conveyor. The downstream conveyor, thus carrying a heavier load of product than the upstream conveyor, is more prone to product loss and blockages, which can lead to an uneven windrow, or even work stoppages, resulting in lost time and profitability.

[0004] The present innovation aims to overcome these problems and in particular to better distribute the product on the conveyor line.

[0005] To this end, the invention proposes that for an agricultural haymaking machine such as mentioned above, when the conveyors are placed in the or each lateral configuration, the speed of at least one conveyor is automatically adjusted so that the speed of the downstream conveyor is greater than that of the other conveyor(s).

[0006] The invention will be better understood from the following description, which relates to a preferred embodiment, given by way of non-limiting example and explained with reference to the accompanying schematic drawings, in which:

[0007] [Fig.1] represents, in simplified top view, a haymaking machine according to the preferred embodiment of the invention, with the conveyors in right lateral configuration;

[0008] [Fig.2] represents a simplified top view of the machine of [Fig.1] with conveyors in central configuration;

[0009] [Fig.3] represents a simplified side view of the machine of [Fig.1] in transport mode;

[0010] [Fig.4] represents, in simplified top view, a haymaking machine according to a second embodiment of the invention, with the conveyors in left lateral configuration;

[0011] [Fig.5] represents a simplified top view of a haymaking machine according to a third embodiment of the invention, attached to the rear of a tractor, with conveyors in a central configuration;

[0012] [Fig.6] represents a simplified control diagram of a haymaking machine according to a first variant of the invention;

[0013] [Fig.7] represents a simplified control diagram of the machine in [Fig.1].

[0014] Fig. 1 illustrates an agricultural haymaking machine (1) intended to be moved in The machine (1) has a forward direction (A) and at least two conveyors (50, 60, 70, 80). The machine (1) also has a frame (2) to which the conveyors (50, 60, 70, 80) are connected. The frame (2) has a central median plane (P). Preferably, the frame (2) and / or the machine (1) have orthogonal symmetry with respect to the median plane (P).

[0015] In the present description, the terms "front", "back", "lateral", "left", "right", "in front", and "behind" are defined with regard to the forward direction (A). Similarly, the terms "inside" and "outside" are defined with respect to the median plane (P). An inside element is closer to the median plane (P) than an outside element.

[0016] Each conveyor (50, 60, 70, 80) is configured to move a product in a conveying direction (C) oriented transversely to the direction of travel (A). Preferably, the conveying direction(s) (C) is orthogonal to the direction of travel (A). Alternatively, the conveying direction(s) (C) of the conveyors (50, 60, 70, 80) may form an angle of up to 30° with the direction of travel (A), particularly in a horizontal plane that also allows for transverse movement of the product. The conveying directions (C) of the conveyors (50, 60, 70, 80) are preferably parallel. Each conveyor (50, 60, 70, 80) could however have its own conveying direction (C), so that the conveying directions (C) of adjacent conveyors (50, 60, 70, 80) form an angle.

[0017] Furthermore, the conveyors (50, 60, 70, 80) are preferably aligned along the conveying direction (C), reducing the length of the machine (1) in the direction of travel (A) and allowing the product to be moved from one conveyor (50, 60, 70, 80) to another with less risk of product loss. Each conveyor (50, 60, 70, 80) can move the product in either a first (C1) or a second (C2) conveying direction. Each conveyor (50, 60, 70, 80) can move the product in either the first (C1) or the second (C2) direction. The first (C1) direction is opposite to the second (C2) direction. It is agreed that the first (C1) direction is from left to right.

[0018] When the product is deposited by a conveyor (50, 60, 70, 80), the product forms a windrow (17) on the ground due to the movement of the machine (1) in the direction of travel (A). The windrow (17) is therefore longitudinal in the direction of travel (A). When a conveyor (50, 60, 70, 80) moves the product in the first direction (C1), it can form a windrow (17) to its right.

[0019] As can be seen in particular in [Fig. 1], a transfer device (4) is associated with each conveyor (50, 60, 70, 80). Each transfer device (4) is designed to transfer the product to the associated conveyor (50, 60, 70, 80). Preferably, each transfer device (4) is of equivalent length to the associated conveyor (50, 60, 70, 80) along the conveying direction (C). Each transfer device (4) may, in particular, consist of at least one cutting bar and / or at least one collection roller. The product may, in particular, be plant material, such as grass or straw. When the transfer device (4) includes a cutting bar, it allows for the cutting of standing vegetation. When the transfer device (4) includes a collection roller, it allows for the movement of previously cut vegetation.

[0020] At least one conveyor (50, 60, 70, 80) can be moved substantially along the conveying direction (C). Preferably, all conveyors (50, 60, 70, 80) can be moved substantially along the conveying direction (C). In order to center the swath (17) on the median plane (P), each conveyor (50, 60, 70, 80) can be moved along the conveying direction (C) relative to the frame (2) by a displacement actuator (5). It is agreed that a first conveyor (50) is located on the left side and a second conveyor (60) is located on the right side of the machine (1), viewed along the direction of travel (A). Preferably, each of the first and second conveyors (50, 60) is located on one side of the frame (2).By moving at least one conveyor (50, 60, 70, 80) along the conveying direction (C), the conveyors (50, 60, 70, 80) can be positioned in at least one lateral configuration, in which all conveyors (50, 60, 70, 80) are placed side by side. Moving at least one conveyor (50, 60, 70, 80) also allows for adaptation. the machine (1) under different conditions, including the volume and / or length of the product, but also the windrow collection machine (17).

[0021] In each lateral configuration, the conveying directions (C1, C2) of all conveyors (50, 60, 70, 80) are identical. In each lateral configuration, the product is deposited by a downstream conveyor (50, 60, 70, 80). The downstream conveyor (50, 60, 70, 80) is the one closest to the windrow (17). Regardless of the lateral configuration, the machine (1) has only one downstream conveyor (50, 60, 70, 80). In the lateral configuration of the conveyors (50, 60, 70, 80), the upstream conveyor (50, 60, 70, 80) is located on the opposite side of the windrow (17). Also, in the lateral configuration of conveyors (50, 60, 70, 80), the downstream conveyor (50, 60, 70, 80) receives product from the upstream conveyor (50, 60, 70, 80).

[0022] As can be seen from [Fig. 2], the conveyors (50, 60, 70, 80) can also be arranged in a central configuration. In the central configuration, the first (50) and second (60) conveyors are further apart than in the lateral configuration. The conveyors (50, 60, 70, 80) closest to the median plane (P) are separated from each other by a central spacing (e). In other words, in the central configuration, the conveyors (50, 60, 70, 80) closest to the median plane (P) are not adjacent.

[0023] In the central configuration of the conveyors (50, 60, 70, 80), the conveying directions (Cl, C2) of the conveyors (50, 60, 70, 80) are directed towards the median plane (P). In this way, the product is deposited between the first conveyor (50) and the second conveyor (60). In the central configuration, the direction (Cl, C2) of the conveyor(s) (50, 60, 70, 80) located on one side of the median plane (P) is opposite to the direction (Cl, C2) of the conveyor(s) (50, 60, 70, 80) located on the other side of the median plane (P).

[0024] The central spacing (e) thus corresponds to the distance separating the conveyors (50, 60, 70, 80) between which the windrow (17) is deposited, if applicable. In the embodiments of Figures 2, 4, and 6, the central spacing (e) corresponds to the distance separating the first conveyor (50) from the second conveyor (60). Two conveyors (50, 60, 70, 80) are said to be side-by-side when the central spacing (e) is such that no windrow (17) is formed between them. The central spacing (e) is measured along the conveying direction (C). In the lateral configuration(s), the central spacing (e) is substantially zero. When all conveyors (50, 60, 70, 80) are placed side by side, there is no gap between two adjacent conveyors (50, 60, 70, 80). Preferably, the center spacing (e) is set by the displacement actuator (5).

[0025] The different conveyor configurations (50, 60, 70, 80) allow the machine (1) to be adapted to different working conditions, for example to the volume and / or length of the product. The different conveyor configurations (50, 60, 70, 80) can also allow the windrow (17) and in particular its width to be adapted according to the windrow collection machine (17), such as a baler or a forage harvester in particular.

[0026] As shown in [Fig. 2], the machine (1) is preferably coupled to a tractor (8). The tractor (8) allows the machine (1) to be moved in the direction of travel (A). It also allows the machine (1) to be driven, notably by means of its power take-off and hydraulic circuit. Alternatively, the machine (1) can be a self-propelled vehicle. The operator of the machine (1) is the driver of the tractor (8) or the self-propelled vehicle. In both cases, each conveyor (50, 60, 70, 80) is preferably connected to the frame (2) by an arm (10). The median plane (P) is preferably vertical. The median plane (P) is also preferably parallel to the direction of travel (A).

[0027] Preferably, each conveyor (50, 60, 70, 80) comprises a belt (51) and at least two cylinders (52) through which the belt (51) is tensioned. The belt (51) of each conveyor (50, 60, 70, 80) is driven by at least one of the cylinders (52). The at least two cylinders (52) of a belt (51) are driven about axes parallel to the direction of feed (A) in top view. Since the product movement is primarily horizontal, the axes of the cylinders (52) are substantially horizontal. Alternatively, each conveyor (50, 60, 70, 80) can be made by a screw conveyor driven in rotation about an axis transverse to the direction of feed (A) and substantially horizontal.

[0028] In order to vary, in particular, the location and shape of the windrow (17), each conveyor (50, 60, 70, 80) can be driven at a respective speed. In other words, the speed of each conveyor (50, 60, 70, 80) can be individually adjusted. For this purpose, the speed of each conveyor (50, 60, 70, 80) is preferably adjusted by a drive source (6). In the case of belt conveyors (50, 60, 70, 80) (51), the drive source (6) is connected to at least one cylinder (52). The drive source (6) could be the tractor's power take-off (8), to which each conveyor (50, 60, 70, 80) would be connected by a respective gearbox and / or controllable reverser(s). Preferably, each conveyor (50, 60, 70, 80) is associated with a respective drive source (6) capable of regulating the speed of that conveyor (50, 60, 70, 80). Preferably, each drive source (6) is a hydraulic motor (6').Preferably, the hydraulic motors (6') are connected to a hydraulic pump (19). The pump (19) can be part of the machine (1) or the tractor (8). Each drive source (6) could also be an electric motor. The direction (C1, C2) of conveying a conveyor (50, 60, 70, 80) is determined by the associated drive source (6).

[0029] As shown in Figures 1, 2, 4 and 5, the machine (1) is in working mode. The different conveyor configurations (50, 60, 70, 80) especially when the machine (1) is in working mode. As can be seen from the figures, each transfer device (4) preferentially extends substantially parallel to the associated conveyor (50, 60, 70, 80). Each transfer device (4) is preferentially fixed to the associated conveyor (50, 60, 70, 80), so that when a conveyor (50, 60, 70, 80) is in a given configuration, the associated transfer device (4) is in the same configuration. In the working mode of the machine (1), each transfer device (4) is located in front of the associated conveyor (50, 60, 70, 80), thus facilitating the transfer of product in the opposite direction to the feed direction (A).

[0030] In the working mode, the transfer devices (4) collect the product from the ground and the conveyors (50, 60, 70, 80) extend substantially horizontally and / or parallel to the ground. To allow the transfer devices (4) and / or the conveyors (50, 60, 70, 80) to follow the unevenness of the ground during the movement of the machine (1), each arm (10) can pivot relative to the frame (2) along at least one axis oriented parallel to the median plane (P).

[0031] As shown in [Fig. 3], the machine (1) can be used in a transport configuration in which the conveyors (50, 60, 70, 80) are oriented at least substantially parallel to the median plane (P), thus reducing the width of the machine (1). To reduce the height of the machine (1) in the transport configuration, the conveyors (50, 60, 70, 80) are preferably oriented parallel to the direction of travel (A). Furthermore, in the transport configuration, the conveyors (50, 60, 70, 80) are located at a certain distance from the ground to allow for a higher forward speed on the road without damaging the machine (1). It follows from the above that the machine (1) can be used in at least one other mode.

[0032] Preferably, the machine (1) can also operate in a maneuvering mode in which the conveyors (50, 60, 70, 80) are slightly raised off the ground. In this maneuvering mode, the conveyors (50, 60, 70, 80) are oriented transversely to the direction of travel (A). This maneuvering mode is an intermediate position of the conveyors (50, 60, 70, 80) between the working and transport modes, preventing the conveyors (50, 60, 70, 80) from interfering with the product on the ground. Switching to maneuvering mode takes less time than switching to transport mode.

[0033] According to an important feature, when the conveyors (50, 60, 70, 80) are placed in the or each lateral configuration, the speed of at least one of the conveyors (50, 60, 70, 80) is automatically set so that the speed of the downstream conveyor (50, 60, 70, 80) is greater than that of the other conveyor(s) (50, 60, 70, 80).

[0034] Thanks to these arrangements, in a lateral configuration, the speed of each conveyor (50, 60, 70, 80) is automatically adjusted to the volume and / or quantity of product it must move relative to the other conveyors (50, 60, 70, 80), thus promoting an even distribution of the product on all conveyors (50, 60, 70, 80) and advantageously reducing the risk of blockage accumulation on the machine (1). As a result, the forward speed of the machine (1) can be increased to accelerate agricultural work while reducing the risks of product loss, uneven windrows (17), and machine (1) stoppages. In addition, the fact that the conveyor speed (50, 60, 70, 80) is set automatically allows for greater driving comfort, as the user has to set one less parameter and is therefore less likely to make a mistake or forget something.

[0035] Preferably, when the conveyors (50, 60, 70, 80) are placed in the lateral configuration(s), the speed of the downstream conveyor (50, 60, 70, 80) is automatically increased, for example, by a speed of 0% to 50% higher than that of the upstream conveyor (50, 60, 70, 80). Alternatively or additionally, the speed of the upstream conveyor (50, 60, 70, 80) can be decreased. Simply put, when the conveyors (50, 60, 70, 80) are placed in the lateral configuration(s), only the speed of the downstream conveyor (50, 60, 70, 80) is increased.

[0036] In the preferred embodiment of [Fig. 1], the machine (1) has only two conveyors (50, 60, 70, 80), namely the first conveyor (50) and the second conveyor (60). In [Fig. 1], the first conveyor (50) and the second conveyor (60) are adjacent and oriented in the first direction (C1) of conveying, so that they occupy a right-hand lateral configuration. The product is thus deposited in a windrow (17) located to the right of the downstream conveyor (50, 60, 70, 80), respectively to the right of the machine (1). In [Fig. 1], the downstream conveyor (50, 60, 70, 80) is the second conveyor (60). In [Fig.1], the upstream conveyor (50, 60, 70, 80) is the first conveyor (50). Preferably, the conveyors (50, 60, 70, 80) can also be placed in a left-side configuration, in which they are joined together and move the product in the second direction (C2) of conveying.

[0037] According to an interesting feature, when the conveyors (50, 60, 70, 80) are placed in the central configuration, at least the speeds of the conveyors (50, 60, 70, 80) closest to the median plane (P) are automatically set to a value lower than the speed of the downstream conveyor (50, 60) in the lateral configuration, thus ensuring a regular and centered windrow. Therefore, at least the speeds of the first conveyor (50) and the second conveyor (60) are automatically set to the same value. Indeed, in this central configuration, two conveyors (50, 60, 70, 80) deposit product between them, so an excessive speed of at least one of these conveyors (50, 60, 70, 80) could lead to Hazardous scattering and / or intermingling of the product from each conveyor (50, 60, 70, 80) therefore presents a greater risk of forming a heterogeneous windrow (17). Preferably, when conveyors (50, 60, 70, 80) are placed in the central configuration, the speeds of all conveyors (50, 60, 70, 80) are automatically set to the same value.

[0038] Furthermore, when the conveyors (50, 60, 70, 80) are placed in the central configuration, at least the speeds of the first conveyor (50) and the second conveyor (60) are automatically set to a value lower than the speed of the downstream conveyor (50, 60, 70, 80) in the lateral configuration, advantageously reducing the consumption of the machine (1) in the central configuration. Reducing the speed of the conveyors (50, 60, 70, 80) in the central configuration also makes it possible to form more homogeneous windrows (17), since the impact of the two product flows is less. Preferably, when conveyors (50, 60, 70, 80) are placed in the central configuration, the speeds of all conveyors (50, 60, 70, 80) are automatically set to a value lower than the speed of the downstream conveyor (50, 60, 70, 80) in the lateral configuration.

[0039] In the preferred embodiment, the first (50) and second (60) conveyors are placed in the central configuration, their speeds are automatically set to a value identical to and lower than the speed of any of the conveyors (50, 60, 70, 80) in the lateral configuration, further reducing the consumption of the machine (1) in the central configuration and contributing to an even more homogeneous windrow (17).

[0040] Preferably, when the conveyors (50, 60, 70, 80) are placed from the central configuration into the or each lateral configuration, the speed of the downstream conveyor (50, 60, 70, 80) is automatically increased, for example to a speed 0% to 50% higher than its speed in the central configuration.

[0041] Preferably, the machine (1) includes a controller (7). The controller (7) is capable of transmitting a signal to control one or more parameters of the machine (1). In particular, the controller (7) can adjust the speed of at least one conveyor (50, 60, 70, 80). The controller (7) is capable of transmitting a signal to adjust the speed of each of the conveyors (50, 60, 70, 80). Thus, the user can control the machine (1) by entering instructions on the controller (7) or on a terminal that transmits these instructions to the controller (7), facilitating operation and improving the ergonomics of the machine (1). The terminal and the controller (7) can form a single component. Conveniently, the controller (7) is advantageously located in the driver's cab of the self-propelled machine (1) or tractor (8).

[0042] As shown in [Fig. 6], at least one conveyor (50, 60, 70, 80) is associated with a hydraulic distributor (18). Depending on its position, the distributor(s) (18) Hydraulic allows the respective hydraulic motor (6') to be connected to a hydraulic pump (19) in order to drive the associated conveyor (50, 60, 70, 80) so that it moves the product in the first or second conveying direction (C1, C2). Preferably, a hydraulic distributor (18) is associated with each conveyor (50, 60, 70, 80). In a first embodiment illustrated in [Fig. 6], the machine (1) has only two conveyors (50, 60, 70, 80), each of which is associated with a pressure regulator (20) and a flow limiter (21), across the terminals of which is connected a non-return valve (22).

[0043] As shown in [Fig. 6], the positions of the distributors (18) correspond to a right-hand lateral configuration of the conveyors (50, 60, 70, 80), and to a speed of the first conveyor (50) lower than the speed of the second conveyor (60). Indeed, the distributor (18) associated with the first conveyor (50) directs the oil from one or the pump (19) through the associated flow limiter (21), while the distributor (18) associated with the second conveyor (60) directs the oil into an unrestricted channel, so that the speed of the first conveyor (50) is lower than the speed of the second conveyor (60). In addition, as shown in [Fig.6], each distributor (18) directs the oil to the associated hydraulic motor (6'), so that each of the first and second conveyors (50, 60) has the same conveying direction, namely the first conveying direction (Cl).

[0044] As shown in [Fig. 6], the controller (7) can change the position of one or both of the distributors (18). The controller (7) can also control the displacement actuator (5). The controller (7) can therefore be configured so that, when the user enters an instruction (via the controller (7)) to switch to a lateral configuration, the controller (7) transmits, preferably simultaneously, a signal to the displacement actuator (5) to bring the first and second conveyors (50, 60) together and a signal to the distributors (18) so that the first and second conveyors (50, 60) have the same direction (C) and different speeds. An advantage of this first embodiment is that the signal sent by the controller (7) can be electrical or hydraulic. Thus, the invention can advantageously be applied even if the tractor (8) does not have electronics.

[0045] In the first embodiment, the controller (7) can be configured so that, when the user enters an instruction (via the controller (7)) to enter a central configuration, the controller (7) transmits:

[0046] - a signal to the displacement actuator (5), in order to space the first and second conveyors (50, 60) of a central spacing (e);

[0047] - a signal to position the distributor (18) associated with the second conveyor (60) of so that the oil is directed through the associated flow restrictor (21) and that The associated hydraulic motor (6') drives the second conveyor (60) so that it moves the product in the second direction (C2) of conveying and

[0048] - and a signal to the distributor (18) associated with the first conveyor (50), so that the oil The flow is directed through the associated flow limiter (21), and the associated hydraulic motor (6') drives the second conveyor (60) so that it moves the product in the first direction (C1) of conveying. It follows that the first and second conveyors (50, 60) are spaced apart, move the product in opposite directions (C1, C2) of conveying, and have the same speeds, but lower than the downstream conveyor (50, 60, 70, 80) in a lateral configuration. It is clear from the above that in the first embodiment, the controller (7) is configured to automatically adjust the center spacing (e), as well as the directions (C1, C2) of conveying and the speeds of the conveyors (50, 60, 70, 80) according to their configuration.

[0049] It is noted that in the variant of [Fig. 6], each pressure regulator (20) allows excess oil to be discharged when it is directed to the associated flow limiter (21). A disadvantage of this variant is that the activation of a pressure regulator (20) increases the consumption of the pump(s) (19) and can cause the oil to overheat, potentially reducing its quality.

[0050] As shown in [Fig. 7], the controller (7) is preferably an electronic control unit (ECU). The controller (7) is thus capable of receiving a signal representative of the configuration of the conveyors (50, 60, 70, 80). The signal representing the configuration of the conveyors (50, 60, 70, 80) may, in particular, include a signal representing the direction (C1, C2) of travel of each conveyor (50, 60, 70, 80) and a signal representing the center spacing (e). Alternatively or additionally, the signal representing the configuration of the conveyors (50, 60, 70, 80) may include a signal representing the speed of each conveyor (50, 60, 70, 80), and / or a signal representing comparisons of these speeds. In practical terms, the signals received and emitted by the controller (7) conform to the ISOBUS standard (ISO 11783).

[0051] The machine (1) may include a distance sensor (14) capable of transmitting to the controller (7) a signal representing the center spacing (e). The signal representing the center spacing (e) may be emitted by the distance sensor (14) when the relevant conveyors (50, 60, 70, 80) are adjacent and / or when the center spacing (e) exceeds a threshold value. The threshold value for the center spacing (e) may be 0 (zero) meters. The distance sensor (14) could be integrated into the displacement actuator (5).

[0052] In order to vary the width of the swath (17), the controller (7) can preferably adjust the central spacing (e) continuously, for example between 0 and 4 meters. As shown in [Fig. 7], at each hydraulic motor (6') A proportional hydraulic distributor (18) can be connected. In the preferred embodiment, the distance sensor (14) measures the center distance (e) between the first and second conveyors (50, 60) and transmits a signal proportional to the center distance (e) to the controller (7). Alternatively or additionally, the speed of at least one conveyor (50, 60, 70, 80) can be adjusted proportionally to the center distance (e) in the central configuration. For example, the speeds of the first and second conveyors (50, 60) can be adjusted so that the larger the center distance (e), the higher the speeds of the first and second conveyors (50, 60) will be, thus reducing the risk of jamming.

[0053] The machine (1) may include a direction sensor (15) associated with each conveyor (50, 60, 70, 80) and capable of transmitting to the controller (7) a signal representing the direction (C1, C2) of conveying of each conveyor (50, 60, 70, 80). Preferably, each direction sensor (15) is integrated into the drive source (6) associated with the respective conveyor (50, 60, 70, 80).

[0054] Preferably, the controller (7) is capable of transmitting to each distributor (18) a signal representative of the direction (Cl, C2) of the desired conveying and proportional to the desired speed for the associated conveyor (50, 60, 70, 80), which allows for simple, economical and easily modifiable automation of continuous speed adjustment of the conveyors (50, 60, 70, 80).

[0055] Preferably, the controller (7) can adjust the direction (Cl, C2) of conveying and the speed of at least one conveyor (50, 60, 70, 80) according to the signal representing the configuration of the conveyors (50, 60, 70, 80). Alternatively or additionally, the controller (7) can adjust the direction (Cl, C2) of conveying and the speed of each conveyor (50, 60, 70, 80) according to the signal representing the configuration of the conveyors (50, 60, 70, 80), respectively according to the configuration of the conveyors (50, 60, 70, 80).

[0056] According to another interesting feature, the speed of each conveyor (50, 60, 70, 80) is automatically adjusted proportionally to the feed speed of the machine (1), allowing the conveyor speeds (50, 60, 70, 80) to be adapted to the product flow rate. Indeed, the higher the feed speed of the machine (1), the higher the product flow rate, and the faster the conveyors (50, 60, 70, 80) must move the product to avoid jamming. Thus, regardless of the configuration of the conveyors (50, 60, 70, 80), the speed of each conveyor (50, 60, 70, 80) is proportional to the feed speed of the machine (1). Thanks to this automation, operator comfort is further improved.

[0057] According to an advantageous feature, the controller (7) may include a memory. When the controller (7) receives the signal representing the feed rate of the machine (1) can compare this speed to one or more values ​​stored in its memory and adjust the speed of each conveyor (50, 60, 70, 80) according to this comparison(s). In particular, the speed of each conveyor (50, 60, 70, 80) could be adjusted according to different feed speed increments.

[0058] The controller (7) can receive a signal representative of the forward speed of the machine (1). The signal representative of the forward speed of the machine (1) can be obtained by at least one of a GPS sensor (23), a speed sensor mounted on the machine (1) and / or a speed sensor integrated into the tractor (8).

[0059] It appears that the controller (7) is capable of receiving a signal representative of the feed rate of the machine (1) and that the controller (7) is capable of adjusting the speed of at least one conveyor (50, 60, 70, 80) according to this feed rate. Preferably, the controller (7) is capable of receiving a signal representative of the feed rate of the machine (1) and of adjusting the speed of each conveyor (50, 60, 70, 80) according to this feed rate.

[0060] Preferably, the ratio of the speed of each conveyor (50, 60, 70, 80) to the feed speed of the machine (1) can be adjusted, allowing for better adaptability to different product conditions and / or user preferences. To ensure product movement even when the feed speed of the machine (1) is zero or low, the controller (7) can be configured to set the speed of each conveyor (50, 60, 70, 80) to a minimum value when the feed speed of the machine (1) is below a predetermined threshold. Preferably, when the feed speed of the machine (1) is below a predetermined threshold, the controller (7) is configured to set the speed of each conveyor (50, 60, 70, 80) to a value equal to thirty percent (30%) of its maximum speed. This threshold determined for the forward speed of the machine (1) can for example be 5km / h.Alternatively or additionally, the user can set a minimum speed for each conveyor (50, 60, 70, 80) and / or a minimum ratio between the speed of each conveyor (50, 60, 70, 80) and the feed speed of the machine (1). The minimum speed for each conveyor (50, 60, 70, 80) can depend on the ratio between the speed of each conveyor (50, 60, 70, 80) and the feed speed of the machine (1). Thus, even if the machine (1) is moving at a low speed, the speed of each conveyor (50, 60, 70, 80) remains above this minimum value.

[0061] To prevent the product from being ejected too far by each conveyor (50, 60, 70, 80), the user can also set a maximum value for the speed of each conveyor (50, 60, 70, 80) and / or a maximum ratio between the speed of each conveyor (50, 60, 70, 80) and the feed speed of the machine (1). Thus, even if the machine (1) moves at a high speed, the speed of each conveyor (50, 60, 70, 80) remains below this maximum value.

[0062] Preferably, each transfer device (4) is a pickup roller driven in rotation about a respective roller axis (16). Preferably, each roller axis (16) is parallel to the direction of conveying. Each pickup roller has fingers distributed around its periphery for picking up the product from the ground and transferring it to the associated conveyor (50, 60, 70, 80) by projecting it rearward. Each pickup roller is preferably driven about its respective roller axis (16) by a respective drive motor (9). The drive motor (9) may, in particular, be hydraulic or electric. Each pickup roller could, however, also be driven via the tractor's power take-off (8).

[0063] Preferably, each transfer device (4) can have a respective transfer speed. According to an advantageous feature, the controller (7) can be configured to automatically adjust the speed of each transfer device (4) according to the speed of the associated conveyor (50, 60, 70, 80). This feature allows for greater ease of operation, as the user only needs to adjust one less parameter each time the conveyor configuration (50, 60, 70, 80) changes. Furthermore, adapting the speed of the transfer devices (4) to the feed speed of the machine (1) allows their speed to be matched to the flow rate of product being transferred. In particular, the controller (7) can be configured to adjust the speed of each transfer device (4) proportionally to the speed of the associated conveyor (50, 60, 70, 80).

[0064] In the preferred embodiment of Figures 1 and 2, the machine (1) does not include any conveyors (50, 60, 70, 80) other than the first conveyor (50) and the second conveyor (60). In the preferred embodiment, the machine (1) does not include any central conveyors (70, 80).

[0065] Alternatively, the machine (1) may include at least one central conveyor (70, 80). The central conveyor(s) (70, 80) is located between the first and second conveyors (50, 60) in the working mode of the machine (1). Also, when the conveyors (50, 60, 70, 80) are placed in the lateral configuration(s), the controller (7) is configured to automatically adjust the speed of each conveyor (50, 60, 70, 80), so that the closer the conveyor (50, 60, 70, 80) is to the downstream conveyor (50, 60, 70, 80), the higher its speed, thus preventing blockages for a machine (1) with more than two conveyors (50, 60, 70, 80). Indeed, the more conveyors (50, 60, 70, 80) the machine (1) has, the greater the risk of jamming, particularly on the downstream conveyor (50, 60, 70, 80).

[0066] According to a second embodiment shown in [Fig. 4], the machine (1) comprises a single central conveyor (70). In this second embodiment, the central conveyor (70) is located between the first conveyor (50) and the second conveyor (60) in working mode. According to this second embodiment, in the central configuration, the central conveyor (70) is retracted so that the swath (17) can be deposited between the first and second conveyors (50, 60). According to this embodiment, in the central configuration, the central conveyor (70) can, in particular, be moved into the position it occupies in the machine's (1) maneuvering mode. Alternatively, in the central configuration, the central conveyor (70) is completely removed from the machine (1). According to the second embodiment, only the upstream and downstream conveyors (50, 60, 70, 80) can be moved relative to the frame (2) along the conveying direction (C). As shown in [Fig.4], in the left-side configuration, the downstream conveyor (50, 60, 70, 80) is the first conveyor (50) and the upstream conveyor (50, 60, 70, 80) is the second conveyor (60).

[0067] According to a third embodiment shown in [Fig. 5], the machine (1) comprises a first central conveyor (70) and a second central conveyor (80). In this embodiment, each central conveyor (70, 80) is located between the first conveyor (50) and the second conveyor (60) in the working mode of the machine (1). It is agreed that the first central conveyor (70) is located between the first conveyor (50) and the second central conveyor (80) along the conveying direction (C) and in the working mode of the machine (1). At least according to the third embodiment, in the central configuration, the conveying directions (C1, C2) of the conveyors (50, 60, 70, 80) located on the same side of the median plane (P) are identical.Furthermore, according to this third variant, in the central configuration, the direction (Cl, C2) of conveying of the conveyors (50, 60, 70, 80) located on one side of the median plane (P) is opposite to the direction (Cl, C2) of conveying of the conveyors (50, 60, 70, 80) located on the other side of the median plane (P).

[0068] In the central configuration, the first and second conveyors (50, 60) are offset from their position in the lateral configuration. According to the third embodiment, the central conveyors (70, 80) can also be moved substantially along the conveying direction (C). According to the third embodiment, in the central configuration, each conveyor (50, 60, 70, 80) is offset from the median plane (P) along the conveying direction (C) relative to its position in the lateral configuration. According to the third embodiment, the distance sensor (14) measures the central spacing (e) between the central conveyors (70, 80). According to this third embodiment, in the central configuration, the first conveyor (50) is joined to the first central conveyor (70) and the second conveyor (60) is joined to the second central conveyor (80), in order to form a single windrow (17) between the central conveyors (70, 80). Finally, according to the third variant of the embodiment, in the central configuration of the conveyors (50, 60, 70, 80), the directions (Cl, C2) of conveying of the conveyors (50, 60, 70, 80) are such that the product is deposited between the central conveyors (70, 80).

[0069] Each change in the configuration of the conveyors (50, 60, 70, 80) is ensured by the displacement actuator (5). Each conveyor (50, 60, 70, 80) can be associated with at least one respective hydraulic cylinder (5'). In the preferred embodiment, the displacement actuator (5) is implemented by two hydraulic cylinders (5'). However, the displacement actuator (5) could also be implemented by a single hydraulic cylinder (5') connected to the first conveyor (50) and the second conveyor (60).

[0070] As shown in [Fig. 4], each arm (10) may comprise a first part (10') of the arm (10) connected to the respective conveyor (50, 60, 70, 80) and a second part (10”) connected to the frame (2). The first part (10') may slide relative to the second part (10”), for example by means of a respective hydraulic cylinder (5'). Each arm (10) is then preferably telescopic.

[0071] Preferably, each of the conveyors (50, 60, 70, 80) is connected to the arm (10) respective by two offset connecting rods (11). Each offset connecting rod (11) is advantageously connected to a respective conveyor (50, 60, 70, 80) and to the arm (10) by a respective articulation allowing pivoting about at least one substantially vertical axis. In this way, the arm (10), each conveyor (50, 60, 70, 80), and the two respective offset connecting rods (11) form a four-bar linkage in a horizontal plane, allowing each conveyor (50, 60, 70, 80) to move along the conveying direction (C) relative to the frame (2). Thanks to this four-bar linkage, each conveyor (50, 60, 70, 80) can be moved primarily along the conveying direction (C), but also slightly along the direction of travel (A). The use of offset connecting rods (11) and a four-bar mechanism makes it possible in particular to reduce the effort required to move the conveyors (50, 60, 70, 80) and implies better repairability of the machine (1).Furthermore, the same offset rods (11) can also guide the vertical movement of the conveyors (50, 60, 70, 80). To this end, each articulation between an offset rod (11) and the respective arm (10), as well as each articulation between an offset rod (11) and the respective conveyor (50, 60, 70, 80), also allows pivoting around at least one substantially horizontal axis, advantageously enabling the conveyors to be positioned for maneuvering and / or transport. Moreover, by allowing pivoting in a vertical plane of each conveyor (50, 60, 70, 80) in each lateral and central configuration, the offset rods (11) enable dynamic tracking of ground unevenness. increasing the quality of work while reducing damage to the soil's vegetation cover.

[0072] As shown in [Fig. 1], the chassis (2) can be mounted on wheels (12). The wheels (12) are preferably located at the rear of the chassis (2). In addition, each conveyor (50, 60, 70, 80) can rest on the ground via skids (13). Alternatively or additionally, each conveyor (50, 60, 70, 80) can rest on the ground via casters. As shown, the machine (1) is preferably intended to be attached to the rear of the tractor (8).

[0073] Preferably, when the machine (1) is switched from one mode to another, the conveyors (50, 60, 70, 80) are not moved relative to the frame (2) in the conveying direction (C). In this way, when the machine (1) is switched from working mode to maneuvering or transport mode, the conveyors (50, 60, 70, 80) advantageously return to the configuration they were in during their last working mode. The user thus does not have to readjust the speeds and directions (C1, C2) of the conveyors (50, 60, 70, 80).Alternatively, when the machine (1) is transposed into maneuvering or transport mode, the controller (7) could record in its memory the last configuration in which the conveyors (50, 60, 70, 80) were in working mode, so that when the machine (1) is again transposed into working mode, the controller (7) automatically places the conveyors (50, 60, 70, 80) in this last configuration, thus automatically setting the speeds and directions (Cl, C2) of the conveyors (50, 60, 70, 80) without further user intervention.

[0074] Of course, the invention is not limited to the embodiments described and shown in the accompanying drawings, and presented in several constructive variants. Modifications remain possible, particularly with regard to the composition of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims

Demands

1. Agricultural haymaking machine (1) intended to be moved in a direction of travel (A) and comprising at least two conveyors (50, 60, 70, 80), each conveyor (50, 60, 70, 80) being configured to move a product in a conveying direction (C) oriented transversely to the direction of travel (A) in a first (C1) conveying direction or a second (C2) conveying direction and being capable of being driven at a respective speed, at least one conveyor (50, 60, 70, 80) being capable of being moved substantially along the conveying direction (C), so that the conveyors (50, 60, 70, 80) can be placed in at least one lateral configuration, in which all the conveyors (50, 60, 70, 80) are joined together, the (C1, C2) conveying directions of all the conveyors (50, 60, 70, 80) are identical and the product is deposited by a downstream conveyor (50, 60, 70, 80), the conveyors (50, 60, 70, 80) can also be placed in a central configuration,machine (1) characterized in that, when the conveyors (50, 60, 70, 80) are placed in the lateral configuration(s), the speed of at least one conveyor (50, 60, 70, 80) is automatically set so that the speed of the downstream conveyor (50, 60, 70, 80) is greater than that of the other conveyor(s) (50, 60, 70, 80), and in that when the conveyors (50, 60, 70, 80) are placed in the central configuration, the speeds of all the conveyors (50, 60, 70, 80) are automatically set to the same value.

2. Machine according to claim 1, characterized in that in the central configuration, the conveyors (50, 60, 70, 80) closest to the median plane (P) are separated from each other by a central spacing (e) and the conveying directions (Cl, C2) of the conveyors (50, 60, 70, 80) are directed towards the median plane (P), and in that when the conveyors (50, 60, 70, 80) are placed in the central configuration, at least the speeds of the conveyors (50, 60, 70, 80) closest to the median plane (P) are automatically set to a value identical to that lower than the speed of the downstream conveyor (50, 60) in the lateral configuration.

3. Machine according to claim 2, characterized in that the machine (1) comprises a controller (7) configured to automatically adjust the center spacing (e), as well as the directions (Cl, C2) Conveying and conveyor speeds (50, 60, 70, 80), depending on their configuration.

4. Machine according to claim 1 or 2, characterized in that the machine (1) comprises a controller (7) capable of receiving a signal representative of the configuration of the conveyors (50, 60, 70, 80) and, as a function of this signal, of adjusting the direction (Cl, C2) of conveying and the speed of at least one conveyor (50, 60, 70, 80).

5. Machine according to claim 3 or 4, characterized in that the signal representing the configuration of the conveyors (50, 60, 70, 80) comprises a signal representing the direction (Cl, C2) of conveying of each conveyor (50, 60, 70, 80) and a signal representing the central spacing (e).

6. Machine according to any one of claims 3 to 5, characterized in that the controller (7) is capable of receiving a signal representative of the feed rate of the machine (1) and of adjusting the speed of at least one conveyor (50, 60, 70, 80) according to this feed rate.

7. Machine according to claim 6, characterized in that the controller (7) can be configured to set the speed of each conveyor (50, 60, 70, 80) to a minimum value, when the feed speed of the machine (1) is less than a determined threshold.

8. Machine according to any one of claims 3 to 7, characterized in that a transfer device (4) is associated with each conveyor (50, 60, 70, 80), each transfer device (4) being able to have a respective transfer speed, and in that the controller (7) can be configured to automatically adjust the speed of each transfer device (4) according to the speed of the associated conveyor (50, 60, 70, 80).

9. Machine according to any one of claims 3 to 8, characterized in that, when the conveyors (50, 60, 70, 80) are placed in the or each lateral configuration, the controller (7) is configured to automatically adjust the speed of each conveyor (50, 60, 70, 80), so that the closer the conveyor (50, 60, 70, 80) is to the downstream conveyor (50, 60, 70, 80), the higher its speed.

10. A machine according to any one of claims 2 to 9, characterized in that the machine (1) can operate in a mode of operation in which the conveyors (50, 60, 70, 80) extend substantially horizontally and / or parallel to the ground and at least one other mode, and in that when the machine (1) is transposed from one mode to another, the conveyors (50, 60, 70, 80) are not moved relative to the frame (2) in the conveying direction (C).

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