Machine for landscape maintenance, more particularly of the brush cutter or mower type and motorized rolling vehicle equipped with such a machine

Abstract

Machine for landscape maintenance, more particularly of the brushcutter or mower type and motorized rolling vehicle equipped with such a machine The invention relates to a machine for landscape maintenance, more particularly of the brushcutter or mower type, suitable and intended to equip a motorized vehicle, the machine comprising: an arm (1) articulated on a frame (8) suitable for being mounted on the motorized vehicle, a tool (2) connected in an articulated manner to one of the ends of the arm (1), a connecting device (3) ensuring the mechanical connection between the tool (2) and the arm (1) and comprising a first part secured to the arm (1) and a second part secured to the tool (2), a rotation axis between the first part and the second part and a mechanism for driving the rotational movement, at least one elongated feed element (4),flexible or flexible characterized in that the element or at least one of the supply element(s) (4) passes through the connecting device (3) while being guided in an opening made through the connecting device (3). It also relates to a motorized rolling vehicle equipped with such a machine Figure to be published with the abstract: Fig. 1,

Description

Title of the invention: Machine for landscape maintenance, more particularly of the brush cutter or mower type and motorized rolling vehicle equipped with such a machine

[0001] The present invention relates to the field of machines used in road and landscape maintenance work, in particular for the maintenance of road edges and the treatment of vegetation and / or soil and has as its subject a machine for landscape maintenance, more particularly of the brushcutter or mower type and a motorized rolling vehicle equipped with such a machine.

[0002] Machines for landscape maintenance, known as brush cutters (or brush cutters), are already known for maintaining work areas formed by roadside outbuildings such as borders, hedges, embankments and ditches. In particular, they are used to cut or mow grass, bushes and shrubs at the edge of roads and agricultural fields.

[0003] Such brush cutters generally comprise an articulated arm, a tool and a support frame. The arm comprises two opposite ends between which the arm extends, namely a first end articulatedly connected to the frame and a second end articulatedly connected to the tool. The frame is mounted on a motorized rolling vehicle.

[0004] The articulated arm generally consists of at least two parts articulated together. One of the parts of the arm comprising the first end is called the boom and the other comprising the second end is called the rocker. An articulated connection (with one or more degrees of freedom) ensures the connection between the arm and the tool.

[0005] The tool generally comprises a rotor provided with at least one working member such as flails or hammers. The tool may be, for example, a cutter, a pruner and / or a grinder, a cleaner.

[0006] However, several problems can arise when using these brush cutters.

[0007] First of all, the work areas are often difficult to access and the presence of obstacles (panels, posts, branches, trees, etc.) makes it difficult or difficult to work with the tool.

[0008] To overcome this drawback, brush cutters or similar machines comprise a tool which can be oriented and positioned spatially in one or more directions by means of a connection comprising one or more degrees of freedom between the arm and the tool.

[0009] Such a brush cutter is, for example, disclosed in the document FR3091462A1. It includes a triple-articulated connection allowing the cutting tool to work in areas where a conventional cutting tool with a single or double-articulated connection is unable to access.

[0010] Another problem, particularly with an articulated connection, concerns the power hoses / cables connecting the hydraulic or electric drive motor of the tool to the hydraulic or electric power supply source of the motorized vehicle. The hose or cable must have a certain length to be able to extend from the vehicle to the motor via the articulated arm. The length of the hose or cable must be adapted to the kinematics of the machine, particularly to its articulated arm and, in the case where the machine includes an articulated connection, to the articulated arm as well as to the articulated connection between the arm and the tool. The hose must therefore be neither too long nor too short but of an appropriate length to allow the various movements without risk of damage. In order not to create mechanical stress in the power hose or cable, a small excess length is generally provided, especially at the joints.The hose must be long enough to allow all movements of the articulated joint without damaging the hose or cable or preventing normal fluid flow through the hose. In this way, the hose or cable forms a loop around the joint to prevent it from coming into contact with the articulated joint. This extra length of hose or cable prevents the hoses or cables from being stretched, twisted or kinked around their axis under boundary conditions.

[0011] Furthermore, particularly in the case of hydraulic hoses, in order not to generate abnormal operating conditions (impact on the flow rate of hydraulic fluid, pressure drop, friction, wear), it is generally advisable to ensure that the position and fixing of the hose always allow a minimum radius of curvature of the loop to be maintained.

[0012] Thus, more particularly in the case of the use of a connection comprising at least two articulations, in particular a triple-articulated connection, between the articulated arm and the tool, the hoses, cables or other power supply elements are longer in order to be compatible with the extended range of movement of the tool.

[0013] However, it frequently happens that the hoses or cables, due to their considerable length, become entangled in or interfere with vegetation and other obstacles and / or are torn off, despite the formation of loops. Other power elements than the hoses or cables supplying hydraulic or electrical energy to the tool's motor may be affected, such as electrical cables carrying information or hydraulic hoses carrying a cooling fluid.

[0014] The present invention aims to overcome at least one of these drawbacks.

[0015] The machine for landscape maintenance, according to the present invention, more particularly of the brushcutter or mower type, suitable and intended to equip a motorized vehicle, the machine comprising:

[0016] - an arm articulated on a frame capable of being mounted on the motorized vehicle,

[0017] - a tool hingedly connected to one end of the arm and comprising working organs, more particularly cutting and / or grinding organs, driven by a motor supported by the tool,

[0018] - a connecting device ensuring the mechanical connection between the tool and the arm and comprising a first part secured to the arm and a second part secured to the tool, an axis of rotation between the first part and the second part and a mechanism for driving the rotational movement of the first and second parts relative to each other around the axis of rotation,

[0019] - at least one elongated, flexible or supple power element extending at least between the arm and the tool,

[0020] is characterized in that the or each feed element passes through the connecting device while being guided in an opening made through the connecting device.

[0021] The present invention also relates to a motorized rolling vehicle equipped with a machine for landscape maintenance, more particularly of the brush cutter or mower type, the machine comprising a frame mounted on the motorized rolling vehicle, characterized in that the machine for landscape maintenance consists of a machine according to the present invention. This machine for landscape maintenance may be part of the category of agricultural machines or the category of road works machines.

[0022] The invention will be better understood from the following description, which relates to a preferred embodiment, given as a non-limiting example, and explained with reference to the appended schematic drawings, in which:

[0023] [Fig-1] is a perspective view of a landscape maintenance machine of the mower-brushcutter type, according to the present invention, the tool of which, of the cutter type, is driven by a hydraulic motor, with the connecting device comprising a hydraulic connection interface,

[0024] [Fig.2] is a detailed perspective view of the part of the machine located at level of the end of the articulated arm including the connecting device and the tool, with a different tool of the cutting head type with rotor for cutting and grinding plants,

[0025] [Fig.3] is a perspective view of the connecting device shown in [Fig.l] or 2,

[0026] [Fig.4] is a sectional view of the connecting device shown in [Fig.3],

[0027] [Fig.5] is a perspective and exploded view of the connecting device shown in the [Fig.3] or 4,

[0028] [Fig.6] is a perspective view of the hydraulic connection interface re shown in [Fig.5], with one of the interface connection elements having a rotating connection at one of its ends located on the tool side,

[0029] [Fig.7] is a perspective view of the connection interface shown in the [Fig.6] according to another orientation,

[0030] [Fig.8] is a perspective view of a connecting device in another embodiment of production, in particular of its drive mechanism and housing an electrical connection interface comprising a single connection element connected to a plurality of electrical power supply elements,

[0031] [Fig.9] shows the connecting device shown in [Fig.8] according to another orientation, showing a connector suitable for connecting the second power supply element portions located on the tool side.

[0032] The figures show a machine for landscape maintenance, more particularly of the brushcutter or mower type, suitable and intended to be fitted to a motorized vehicle, the machine comprising:

[0033] - an arm 1 articulated on a frame 8 capable of being mounted on the motorized vehicle,

[0034] - a tool 2 connected in an articulated manner to one of the ends 1c of the arm 1 and comprising working members 20, more particularly cutting and / or grinding members, driven by a motor 21 supported by the tool 2,

[0035] - a connecting device 3; 3' ensuring the mechanical connection between the tool 2 and the arm 1 and comprising a first part 30; 30' secured to the arm 1 and a second part 31; 31' secured to the tool 2, an axis of rotation X2 between the first part 30; 30' and the second part 31; 31' and a drive mechanism 32; 32' for the rotational movement of the first and second parts 30, 31; 30', 31' relative to each other around the axis of rotation X2,

[0036] - at least one elongated, flexible or supple power supply element 4; 4', extending to the less between the arm 1 and the tool 2. The element or at least one of the power elements 4; 4' may be a hydraulic or electric power element as will be seen later.

[0037] The motorized vehicle may be a tractor, which tractor may be equipped with a three-point hitch intended to receive the frame 8 of the brush cutter. The landscaping machine may be mounted at the front or rear of the motorized vehicle. The motorized vehicle may be a self-propelled vehicle. Such a landscaping machine may be used in the agricultural context for the maintenance of the edges of fields and paths and / or in the context of road works for cleaning road edges.

[0038] If we refer to [Fig.l], we can see that the tool 2 can be a cutting blade and may include working members 20 of the saw type. Such a cutter bar may be equipped with at least one saw. This type of tool is especially suitable for pruning trees, for trimming hedges and bushes or for pruning vegetation on embankments and roadsides. In [Fig.2], it can be seen that, in another form, the tool 2 may include a cutting head equipped with mowing, clearing or shredding members. Thus, the tool 2 can mow, clear or shred plants for maintaining the edges of fields or roads. The working members are hidden by the cover of the tool 2. The tool 2 may include a combination of working members 20 providing different functions. The machine for landscape maintenance is also intended to be used on sloping ground, for example embankments or in ditches. As shown in [Fig.l], the articulated arm consists of at least two parts 1a, 1b (arrow 1a, pendulum 1b) articulated together. In an alternative not shown, the articulated arm can consist of three parts, or even more than three parts, articulated together.

[0039] The connecting device 3 is preferably adapted to allow a rotation of between 0° and 360° between the first and second parts 30, 31 relative to each other around the axis of rotation X2. A rotation of this amplitude is achievable thanks to the drive mechanism 32 which will be described in more detail later.

[0040] The term “power supply element 4; 4'” means a connecting element allowing the transport of energy or information to or from the tool 2, for example to and from the motor 21 of the tool 2. The energy may be electrical, light or hydraulic energy. The electrical or hydraulic energy transported by such a power supply element may be used to supply electricity or hydraulic power to the motor 21 of the tool 2 when the latter is an electric or hydraulic motor. The transported energy may also be used to cool the motor 21. Information may be transported, in the form of an electrical or light signal, in an electrical power supply element (cable or electric wire) or a power supply element allowing the transport of light (optical fiber for example). Such electrical or optical power supply elements allowing the transport of information are not illustrated.The element or at least one of the power elements 4; 4' may be a hydraulic or electric power element and the motor 21 may be a hydraulic or electric motor respectively.

[0041] Figures 1 to 7 show hydraulic power elements 4 (at least partially visible) connected by one of their ends to the hydraulic motor 21 of the tool 2 of the machine for landscape maintenance. The hydraulic motor 21 is partially hidden by the cover in [Fig.2]. The other end of the power elements 4 is connected to a hydraulic fluid supply source (not illustrated). The motorized vehicle usually has a hydraulic system with different hydraulic distributors, which can be used to direct the oil to the tool 2 via the power elements 4. The hydraulic energy source can be the tank of the motorized vehicle for example. Figures 8 and 9 show, partially, electric power elements 4' capable of being connected by one of their ends to an electric motor (not shown) of the tool of a machine for landscape maintenance according to the present invention. The other end of the electric power elements 4' is capable of being connected to an electric energy supply source. The electric energy source can be an autonomous energy source such as a current generator for example.

[0042] Such power supply elements 4; 4' therefore have a certain length. To preserve them, it is common to fix them at least on the arm 1 of the landscaping machine, for example by means of fixing collars. The power source can be mounted on the motorized vehicle (not shown) or on the landscaping machine.

[0043] In the case of a machine for landscape maintenance whose tool 2 is controlled by a hydraulic motor 21 (case of figures 1 to 7), this case being called hereinafter hydraulic mode, it is hydraulic power elements 4 which connect the motor 21 to the hydraulic energy source. Such a power element 4 hydraulic is known as a hydraulic hose. The hydraulic hose allows the passage in a given direction of a hydraulic fluid, for example a hydraulic oil, in particular a high-pressure hydraulic fluid. In the case of a machine for landscape maintenance equipped with an electric motor, hereinafter called electric mode, it is one or more electrical power supply element(s) figures 8 and 9), generally known as an electric cable or wire, which allow the passage of the electric current according to a given polarity, positive or negative for example. This other electrical embodiment will be described in more detail later in the description.

[0044] Thus, in the hydraulic mode, the landscape maintenance machine may comprise at least two hydraulic supply elements 4 for supplying high pressure to the motor 21. One supply element allows the circulation of the high pressure fluid to the hydraulic motor 21 and the other the return of the high pressure fluid from the motor 21 to the hydraulic energy source. As can be seen in particular in Figures 1 to 5, a third hydraulic supply element 4 (at least partially visible), known as a drain, may be provided for internal leaks in the hydraulic motor 21 and / or the evacuation of hot oil in the closed circuit.

[0045] According to the present invention, in such a machine, the or each element 4; 4' passes through the connecting device 3; 3' while being guided in an opening 33; 33' made through the connecting device 3; 3'. The opening 33; 33' advantageously makes it possible to guide the power element or at least one of the power elements 4, 4'. By passing through the opening 33; 33' of the connecting device 3, the length of the power element 4; 4' or of each power element 4; 4' can be reduced since the path is more direct between the connection to one of the distributors / power supply sources of the motorized vehicle and the hydraulic motor 21 which actuates the working members 20.

[0046] Preferably the opening 33; 33' is an internal opening, preferably an opening of circular or generally circular section.

[0047] Preferably, as is the case for example in the hydraulic mode illustrated by Figures 1 to 7 and in the electrical mode illustrated by Figures 8 and 9, the opening 33; 33' is made through the connecting device 3; 3' so that the or each power element 4; 4' passes through the connecting device 3; 3' essentially at the level of the axis of rotation X2. By "at the level" is meant: close to, at height, along the axis. Preferably, it can also be seen that the opening 33; 33' is made through the connecting device 3; 3' extending parallel to the axis of rotation X2, preferably being centered on the axis of rotation X2. These characteristics make it possible to limit the movements of the power element(s) 4; 4', which prevents their premature wear.They also allow weight savings by reducing the overall length of each of these feed elements 4; 4' (compared to the feed elements 4; 4' passing next to and outside the connecting device in current machines) due to a more direct path through the connecting device 3; 3'. By passing through the opening 33, 33' of the connecting device 3, 3' a neater and more aesthetic passage of the feed elements 4, 4' is achievable. Thanks to the opening 33, 33' the excess length forming the loop of the feed element 4, 4' around the joint can be eliminated. The feed elements 4, 4' are therefore also better protected from the risk of falling branches. The power supply elements 4, 4' which pass through the connecting device 3, 3' are less likely to get caught in branches or brush due to their smaller size.

[0048] Figures 3, 4 and 5 illustrate more particularly, in the hydraulic mode, the opening 33 made through the connecting device 3 for the passage of the three supply elements 4 each in the form of a hose, essentially at the level of the axis of rotation X2. In this embodiment, a first hose 4 makes it possible to bring the hydraulic fluid to the motor 21. A second hose 4 allows the hydraulic fluid to be evacuated into the motor 21. These two hoses 4 have an identical diameter and length. A third hose 4 acts as a drain and has a smaller diameter. It can also be seen that the opening 33 is made in the connecting device 3 extending parallel to the axis of rotation X2 and that the opening 33 is centered on the axis of rotation X2.

[0049] In a preferred embodiment, as can be seen in particular in Figures 2 to 9, the machine further comprises a connection interface 5; 5' housed and held fixedly in position in the connection device 3; 3'. Furthermore, the or at least one of the supply element(s) 4; 4' can be divided into two portions 40, 41; 40', 41' functionally connected to each other by means of the interface 5; 5', namely, on the one hand, a first portion 40; 40' provided with a tip 400; 400' connected to the interface 5; 5' and, on the other hand, a second portion 41; 41' provided with a tip 410; 410' connected to the interface 5; 5' so as to be functionally connected to the tip 400; 400' of the first portion 40; 40' (of the corresponding power element 4; 4'). The division of the power element 4; 4' into two portions facilitates the replacement of one of the portions in the event of deterioration.This also facilitates the assembly and / or disassembly of the power elements 4; 4' when replacing the tool 2. In the hydraulic mode, the end piece 400, 410 is preferably crimped onto the relevant portion 40, 41 of the corresponding power element 4. This end piece 400, 410 may be associated with a nut 9 allowing the attachment of the end piece 400, 410 by screwing onto the interface 5. The interface 5; 5' is configured to allow the functional connection, i.e. for example electrical or hydraulic, between the end piece 400; 400' of the first portion 40; 40' of the or each power element 4; 4' and the end piece 410; 410' of the second portion 41; 41' of the same power element 4; 4'.

[0050] In a preferred embodiment, as seen in Figures 2 to 5, at least one of the end pieces 400 may be bent or provided with an elbow, preferably at a right or obtuse angle. At least one of the end pieces may be straight. Alternatively, the end piece 400 is provided with an attached elbow. According to another alternative, the first portion 40 or the second portion 41 may be provided with a straight end piece 400 (0°) which is associated with a connector bent at an angle of 45° or 90°. According to the solution illustrated in Figures 2 to 5, the end piece 400 of the first portion 40 may be bent at a right angle and the end piece 410 of the second portion 41 may be bent at an obtuse angle. The advantage of an bent end piece is that it can respect the minimum or necessary bending radius for a hydraulic hose.Another advantage of using an angled tip is to improve the guidance of the power elements 4, in particular to guide the first portion 40 and the second portion 4L. This angled embodiment is more particularly suitable for hydraulic mode.

[0051] Preferably, as can be seen in particular in Figures 4 to 7, at least one of the end pieces 410 is connected to the interface 5 by means of a rotating connection. so as to be able to rotate freely around its connection axis. Such a rotating connection is more particularly integrated or mounted in the interface 5, that is to say that the interface 5 preferably comprises such a rotating connection, but the present invention may provide (this form is not illustrated) that the rotating connection is integrated or mounted in the end piece 410. This characteristic of the rotating connection will be described in more detail later in the illustrated embodiment where the rotating connection is an integral part of the connection interface 5.

[0052] In a preferred embodiment of the interface 5, as can be seen more particularly in FIGS. 4 to 7, 9, the interface 5; 5' may comprise one or more connecting element(s) 50; 50', preferably rigid, each dedicated to the power supply element or to at least one of the power supply element(s) 4; 4'. Each connecting element may comprise two connecting ends, preferably axially opposite, namely a first connecting end connected or capable of being connected to the end piece 400; 400' of the or at least one of the first portion(s) 40; 40' and a second connecting end connected or capable of being connected to the end piece 410; 410' of the or at least one of the second portion(s) 41; 41'. It is understood that each or at least one of the connecting end(s) may be configured to be connected to one or more end pieces 400; 400'; 410, 410'. Preferably, the connecting element(s) 50; 50' have an elongated shape, preferably straight and preferably extend parallel to the axis of rotation X2.

[0053] The term “connection” means a connection or link, where appropriate (for a hydraulic supply element) with sealing, making it possible to ensure, depending on the type of supply element 4, 4', the passage of an electric current, light or fluid between each end piece 400, 400'; 410, 410' and the connection element 50; 50' concerned of the interface 5; 5'.

[0054] In the hydraulic mode, each connection element 50 of the interface 5 may comprise an axial channel 52 allowing the passage of fluid between its two ends. Each axial channel 52 is open towards the outside at each of the connection ends 500, 501; 500', 501'.

[0055] Preferably, the interface 5; 5' may comprise a support 51; 51', for example in the form of a disc, on which the connecting element 50; 50' is fixed or are fixed, with arrangement between them, the connecting elements 50; 50'. The support 51; 51' may be fixed in the first or second part 30, 31; 30', 31' of the connecting device 3, preferably being centered on the axis of rotation X2 as can be seen in Figures 3 to 9. According to Figures 1 to 5, the support 51 is fixed or capable of being fixed on the first part 30 of the connecting device 3. It can be seen in [Fig. 5] more particularly that the support 51 may be fixed in the first part 30 by means of screws 11 screwed into tapped holes 301 made in the first part 30. The first part 30 has a circular internal opening forming part of the opening 33. The support 51 is fixed to the first part 30 by means of at least one fixing element 302 provided with a tapped hole 301 receiving by screwing the or one of the screws 11. The fixing elements 302 can also form a bearing surface supporting the support 51 in the opening of the first part 30. In an alternative embodiment and not shown, in the case where at least one of the connecting elements 500 comprises a movable part 501 to form the rotating connection, the interface 5 can be mounted (or fixed), by its support 51, on the second part 31 of the connecting device 3 so that the end piece 400 is connected to the movable part 501 of the connecting element 50.

[0056] In a preferred embodiment, as can be seen more particularly in Figures 4 to 7, at least one of the connection elements 50 may comprise a fixed part 500 and a movable part 501 together forming a rotating connection. The movable part 501 then comprises or forms one of the connection ends of the connection element 50. The two fixed and movable parts 500, 501 thus allow rotation of one of the ends of the connection element 50. Such a rotating connection (formed thanks to the fixed and movable parts 500 501) is more particularly adapted to the hydraulic mode. According to the embodiment shown in [Fig.4], the end piece 400 of the first portion 40 of the supply elements 4 is connected (for example via the associated nut 9), to the fixed part 500 of the connection element 50 and the end piece 410 of the second portion 41 of the supply elements 4 is connected to the movable part 501 of the corresponding connection element 50. Thus, the end piece 410 is able to rotate around its connection axis and follow the rotation of the tool 2 around the axis X2. Generally speaking, under the effect of a movement of the tool 2 relative to the arm 1 and in particular of the connecting device 3, the orientation of the end piece 410 and of the second portion 41 of the supply element 4 relative to the axis X2 may change. When the first and second parts 30, 31 pivot relative to each other, the orientation of the end piece 410 can change and follow the rotation around the axis X2 so that the second portion 41 of the hose can be correctly oriented and not twist.The rotating connection has the advantage of significantly limiting the looping or twisting effects of the supply elements 4 around their axis during rotation of the first part 30 relative to the second part 31 around the axis of rotation X2.

[0057] In this preferred embodiment with rotating connection, each end piece 410 connected to the movable part 501 of the connection element 50 thus has freedom of rotation. The orientation of each of the end pieces 400 connected to the fixed part 500 is fixed relative to the axis X2. The fixed part 500 is integral with the support 51 of interface 5.

[0058] As can be seen more particularly in Figures 4 to 7, the fixing of a connection element 50 on the support 51, where appropriate the fixing of the fixed part 500, can be carried out by tightening by means of a nut 7. The fixed part 500 can be housed in a bore 510 made in the support 51 by protruding through its end. The fixing is then carried out by tightening by means of the nut 7 screwed onto the end, which can where appropriate be the first or second connection end. The end of the connection element 50 can comprise an external thread 503 making it possible to tighten the support 51 between the nut 7 (screwed onto the external thread 503) and a shoulder 504 of the connection element 50. The same external thread 503 can be used for the screw connection of an end piece 400, 410 onto said connection end thus threaded.In this way, the fixed part 500 of the connecting element 50 is blocked in translation and in rotation on the support 51. Thus, if necessary, the end piece 400 will be able to better follow the rotational movement of the connecting device 3 around the axis X2.

[0059] The support 51 can be made in two parts, for example fixed to each other, for example by means of at least one bolt 12. This two-part structure makes it easier to assemble and is known from partition or wall pass-through systems.

[0060] In Figures 6 and 7, it can be seen that one of the end pieces 410 is provided with a quick connector 10. The quick connector 10 allows a quick connection of the end piece 410 to the movable part 501 of the rotating connector. Thanks to such a quick connector 10, the installation of the connection of the end piece 410 of the second portion 41 of the supply element 4 is facilitated. When all the connection elements 50 are provided to be able to be connected to such a quick connector 10 of an end piece 410, the change of the tool 2 is faster. When the connecting element 50 is not provided so that at least one of its connecting ends can be connected to such a quick connector, the end piece can be connected to the movable or fixed part 500, 501 by being screwed using its screw connection and the nut 9 associated with the end piece. As a result, the connecting element 50 is provided with an external thread 503 at each of its connecting ends.The external thread 503 is shown schematically in the figures (only the surface comprising the thread is visible). According to another embodiment, the external thread 503 may also be internal. Each fixed part 500 and each movable part 501 is thus provided with a thread 503. It is understood that a quick connector 10 can be connected, for example by snap-fastening, to a rib of the connection end concerned. Such a rib can be formed by the thread 503. The thread 503 can thus allow the fixing of a tip via a threaded part of the latter which can be the associated nut 9 or the quick connection of a tip via the quick connector 10. According to a . embodiment not shown, a quick connector 10 can be provided on either side of the connection element 50, i.e. at each of its connection ends, so as to facilitate the assembly and disassembly of the end pieces 400 and 410 of the two portions (first and second portions) 40, 41 of the supply elements 4.

[0061] If we refer to figures 4, 5, 8 and 9, we can see that the interface 5; 5' can be centered on the axis of rotation X2 or substantially offset relative to the axis of rotation X2. Preferably the interface 5; 5' can be fixed on the first or second part 30, 31; 30', 31' of the connecting device 3; 3' and can extend, in particular axially, in the opening 33; 33'. Preferably, the interface 5; 5' has a shape substantially complementary to the opening 33; 33' which can be a circular internal opening. The section of the opening 33; 33' shown is circular or generally circular but it could be square, octagonal or even of any shape.

[0062] In a preferred embodiment shown in Figures 1 to 5, the drive mechanism 32 may consist of a rotator device comprising two coaxial rotator elements 320, 321 coupled together by being mounted in rotation relative to each other about the axis of rotation X2 between the first and second parts 30, 31 of the connecting device 3, namely a first rotator element 320 fixed on the first part 30 and a second rotator element 321 fixed on the second part 31 and drive means 322 making it possible to actuate the rotation of at least one of the rotator elements 320, 321 relative to the other. Preferably the opening 33 passes axially through the rotator device. Preferably, the rotator elements 320, 321 each have an annular shape making it possible to delimit a central opening forming at least part of the opening 33 through the connecting device 3.

[0063] In this preferred embodiment of the drive mechanism, as can be seen more particularly in Figures 4 and 5, the drive mechanism 32 may comprise a casing forming the first rotator element 320 and a slewing ring forming the second rotator element 321. In a variant not shown, the casing may form the second rotator element and the slewing ring may form the first rotator element. The drive mechanism 32 is advantageously of annular configuration. The slewing ring 321 is rotatable about the axis of rotation X2 relative to the casing 320. It can be seen in Figures 4 and 5 that the casing 320 is fixed to the first part 30 and the slewing ring 321 is fixed to the second part 31 of the connecting device 3.Preferably, the casing 320 and the slewing ring 321 may each have an annular shape making it possible to delimit a central opening forming at least part of the opening 33 through the connecting device. 3. The housing 320 and the slewing ring 321 may be fitted into one another. The ring may be a ball or roller slewing ring. According to the representation of [Fig. 4], the ring 321 may be fitted into the housing 320. The housing 320 and the slewing ring 321 may be fixed respectively to the first and second parts 30, 31 of the connecting device 3 by means of respective screws 6. Such screws 6, or other fixing means, may be distributed around the opening 33 and / or the rotation axis X2. In addition, the drive mechanism 32 comprises a drive motor 322, for example a hydraulic motor driving a worm screw, making it possible to actuate the rotation. Figures 1, 2, 3 and 5 show the oil inlets / outlets supplying the drive motor 322. The drive mechanism 32 is more particularly adapted to allow rotation ranging from 0 to 360°.By means of the drive mechanism 32, the connecting device 3 can pivot about the axis X2. The drive mechanism 32 has a compact, space-saving shape. By means of its housing 320, the drive mechanism 32 is protected from dust and plant debris. The drive motor 322 may be an electric motor. Such a rotation drive mechanism 32 as such is described, for example, in patent application EPI 150039A2.

[0064] Since the opening 33; 33' is provided through the connecting device 3; 3' and the connecting device 3; 3' is composed of the first part 30; 30', the second part 31; 31' and the drive mechanism 32, 32', each of these parts also has a through opening, as can be seen in Figures 4, 5, 8 and 9. The different through openings are of course aligned on the same axis X2 so as to at least partly form the opening 33; 33' through the connecting device 3; 3'. The internal circular through openings of the drive mechanism 32; 32' of the first part 30; 30' and of the second part 31; 31' are aligned to together form the opening 33; 33' ([Fig.4] for the opening 33). As seen previously, the circular internal opening, for example, of the first part can receive the support 51 of the interface 5 so as to hold it fixedly in the opening 33.

[0065] In the electrical mode (figures 8 and 9), the machine for landscape maintenance may comprise at least two electrical power supply elements 4', one of which may correspond to a first polarity, for example positive, and the other to a second polarity, for example negative, in order to supply current to the electric motor. These elements have an overall annular shape with a circular internal opening 33'. These elements are similar in their function to the elements described in the hydraulic mode, however their shape may be different.

[0066] In the electrical mode, as shown in Figures 8 and 9, the 5' interface of rac The electrical connection may comprise a single electrical connection element 50'. The electrical connection element 50' allows the connection of the first portion 40' of the power supply element 4' to the second portion 41'. For this purpose, each portion 40', 41' has an end piece 400', 410'. The end piece 400' of the first portion 40' is intended to be connected to one end of the electrical connection element 50' and the end piece 410' of the second portion 41' is intended to be connected to the other end of the electrical connection element 50'. The end piece 400' is advantageously circular and the end piece 410' is advantageously rectangular, therefore not cylindrical. More particularly in the electrical mode and / or with a single 50' connection element, each end can be configured to be connected to several end pieces (see [Fig.9]) joined in an electrical connector.

[0067] In the electrical mode, the present invention can nevertheless provide that an assembly brings together at least two end pieces which are connected to the 5' interface by means of the same rotating connection. Thus, two end pieces each corresponding to an electrical polarity can be joined next to each other in the same connector connected to a rotating connection part of the connection interface (form not illustrated). Such a rotating connection can be a rotating connection (or collector) marketed by the company LTN Servotechnik Gmbh under the reference “SCO 12”.

[0068] The present invention may provide, in particular in the electrical mode, that several end pieces 400', 410', for example two or three end pieces 400', 410', of the same set of first portions 40' and / or of the same set of second portions 41' are joined together while being held fixedly next to each other in the form of a connector 42' of the terminal or electrical socket type. Each end piece 400', 410' concerned then forms an electrical contact. The connection interface 5' may preferably comprise a single connection element 50', each end of which comprises at least two electrical contacts each connected to one of the electrical contacts of the other end.Such a connector 42' is connected or capable of being connected to one of the corresponding ends of the connection element 50' by functionally connecting their respective electrical contacts together to ensure the electrical connection between each first portion 40' and the second portion 41' of the same power supply element 4'. This feature makes it possible, by a single operation of connecting / connecting the or each connector 42' to the corresponding end of the connection element 50', to quickly connect all of the first and / or second portions 40', 41' to the interface 5'. Preferably, as can be seen in [Fig.9], a connector 42' is only provided on the side of the tool 2, that is to say for all of the tips 410' of the second portions 41', which makes it possible to quickly connect the second portions 41', in other words the cables. power supply on the side of tool 2, at interface 5, in particular when changing tool 2.

[0069] Referring to Figures 8 and 9, another embodiment of the drive mechanism 32' for the rotational movement of the first and second parts 30', 31' relative to each other about the axis of rotation X2 can be seen. Such a drive mechanism 32' may comprise a hydraulic, electric or pneumatic cylinder 321' whose barrel 322' may be articulated, for example, on the second part 31' and the rod 323' may be articulated at its end on the first part 30'. The cylinder 321' may comprise inlets / outlets 324' for the hydraulic or pneumatic fluid. The cylinder 321' may preferably be a double-acting cylinder.

[0070] In the case where the present invention further provides a cooling circuit, for example for cooling the electric motor 21, at least two supply element(s) may be provided. The cooling energy, for example a cooling fluid such as glycolated water, may be transported by the supply elements. For example, one supply element for the cold liquid and another supply element for the hot liquid. These two supply elements may in the same way pass through the circular internal opening of the connecting device. More particularly, the first portion may be connected to the second portion of the supply element by means of a connecting element connected to the support of the interface.

[0071] In a preferred form, the connecting device 3; 3' may comprise at least two articulations or, in other words, a connection with at least two axes of rotation. The connecting device 3; 3' may preferably form a triple-articulated connection. The triple-articulated connection comprises three axes of rotation XI, X2, X3. A first axis of rotation XI between the first part 30 and the arm 1, a second axis of rotation formed by the axis of rotation X2 between the first and second parts 30, 31 and a third axis of rotation X3 between the second part 31 and the tool 2. The direction of the second axis X2 is substantially perpendicular to the first and third axes XI, X3. According to alternatives not shown, the connecting device may have a simple articulation connection with a single axis of rotation or a double-articulated connection with two axes of rotation substantially perpendicular to each other.In the embodiment shown in Figures 8 and 9, the connecting device 3' has an axis of rotation X2 and an axis of rotation X3. The axis of rotation X3 provided on the second part 31' is visible only in [Fig.9].

[0072] The present invention also relates to a motorized rolling vehicle equipped with a machine for landscape maintenance, more particularly of the brushcutter or mower type. The machine for landscape maintenance comprises a frame 8 suitable for mounting on the motorized rolling vehicle. The landscape maintenance machine according to the invention can have an application in the agricultural, forestry or road works fields.

[0073] Thus, a machine for landscape maintenance according to the present invention has in particular the following advantages:

[0074] - elimination of excessive length of power supply elements (cables, flexible),

[0075] - absence of loop around the articulated connection,

[0076] - limitation or elimination of the twisting of the power elements around their axis, their stretching, or prevention of being twisted,

[0077] - reduced or adapted length of the power supply elements, risk reduced tearing / interference

[0078] - reduction of exposure to external risks (branches),

[0079] - reduced transport size, more compact solution.

[0080] Of course, the invention is not limited to the embodiment described and shown in the attached drawings. Modifications remain possible, in particular from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims

Claims

1. Machine for landscape maintenance, more particularly of the brushcutter or mower type, suitable and intended to equip a motorized vehicle, the machine comprising - an arm (1) articulated on a frame (8) capable of being mounted on the motorized vehicle, - a tool (2) connected in an articulated manner to one of the ends (the) of the arm (1) and comprising working members (20), more particularly cutting and / or grinding members, driven by a motor (21) supported by the tool (2), - a connecting device (3; 3') ensuring the mechanical connection between the tool (2) and the arm (1) and comprising a first part (30; 30') integral with the arm (1) and a second part (31; 31') integral with the tool (2), an axis of rotation (X2) between the first part (30; 30') and the second part (31; 31') and a drive mechanism (32; 32') for the rotational movement of the first and second parts (30, 31; 30', 31') relative to each other around the axis of rotation (X2), - at least one elongated, flexible or flexible feed element (4; 4'), extending at least between the arm (1) and the tool (2), the element or at least one of the supply element(s) (4, 4') passing through the connecting device (3; 3') while being guided in an opening (33; 33') made through the connecting device (3; 3'), - a connection interface (5; 5') housed and held fixedly in position in the connecting device (3; 3'), the connection interface (5; 5') comprising one or more connection element(s) (50; 50'), preferably rigid, each dedicated to the supply element or to at least one of the supply element(s) (4; 4') and each being provided with two connection ends, preferably axially opposite, characterized in that the connection interface (5; 5') comprises a support (51; 51'), for example in the form of a disc, on which the connection element (50; 50') is fixed or are fixed, with arrangement between them, the connecting elements (50; 50').

2. Machine for landscape maintenance, according to claim 1, characterized in that the opening (33; 33') is made through the connecting device (3; 3') so that the or each feed element (4, 4') passes through the connecting device (3; 3') essentially at the level of the axis of rotation (X2).

3. Machine for landscape maintenance, according to claim 1 or 2, characterized in that the opening (33; 33') is made through the connecting device (3) extending parallel to the axis of rotation (X2), preferably being centered on the axis of rotation (X2).

4. Machine for landscape maintenance, according to any one of claims 1 to 3, characterized in that the element or at least one of the supply element(s) (4; 4') is divided into two portions (40, 41; 40', 41') functionally connected to each other by means of the interface (5; 5'), namely a first portion (40; 40') provided with a nozzle (400; 400') connected to the interface (5; 5') and a second portion (41; 41') provided with a nozzle (410; 410') connected to the interface (5; 5') so as to be functionally connected to the nozzle (400; 400') of the first portion (40; 40') of the corresponding supply element (4; 4')

5. Machine for landscape maintenance, according to claim 4, characterized in that at least one of the end pieces (400, 410; 400', 410') is connected to the interface (5, 5') by means of a rotating connection so as to be able to rotate freely around its connection axis.

6. Machine for landscape maintenance, according to any one of claims 1 to 5, characterized in that the interface (5; 5') is centered on the axis of rotation (X2) or substantially offset relative to the axis of rotation (X2).

7. Machine for landscape maintenance, according to any one of claims 1 to 6, characterized in that the interface (5; 5') is fixed on the first or second part (30, 31; 30', 31') of the connecting device (3; 3') and extends into the opening (33; 33').

8. Machine for landscape maintenance, according to any one of claims 1 to 7, characterized in that the drive mechanism (32) consists of a rotator device comprising two coaxial rotator elements (320, 321) coupled together by being mounted in rotation relative to each other about the axis of rotation (X2) between the first and second parts (30, 31) of the connecting device (3), namely a first rotator element (320) fixed on the first part (30) and a second rotator element (321) fixed on the second part (31) and drive means (322) for actuating at least one of the rotator elements (320, 321) relative to the other, preferably the opening (33) passes axially through the rotator device.

9. Machine for landscape maintenance, according to any one of claims 1 to 8, characterized in that the connecting element(s) (50; 50') have an elongated shape, preferably straight and extend parallel to the axis of rotation (X2).

10. Machine for landscape maintenance, according to any one of claims 1 to 9, characterized in that the support (51; 51') is fixed in the first or second part (30, 31; 30', 31'), preferably being centered on the axis of rotation (X2).

11. A landscape maintenance machine according to any one of claims 1 to 10 each taken in combination with claim 5, characterized in that at least one of the connecting elements (50, 50') comprises a fixed part (500) and a movable part (501) together forming a rotating connection, the movable part (501) comprising or forming one of the connecting ends of the connecting element (50; 50').

12. Machine for landscape maintenance, according to any one of claims 1 to 3 and 6 to 11 each taken in combination with claim 4 or 5, characterized in that at least one of the end piece(s) (400) is straight, bent or provided with an elbow, preferably at a right or obtuse angle.

13. Machine for landscape maintenance, according to any one of claims 1 to 12, characterized in that the connecting device (3) forms a triple-articulated connection and comprises three axes of rotation (XI, X2, X3), namely a first axis of rotation (XI) between the first part (30) and the arm (1), a second axis of rotation formed by the axis of rotation (X2) between the first and second parts (30, 31) and a third axis of rotation (X3) between the second part (31) and the tool (2).

14. Machine for landscape maintenance, according to any one of claims 1 to 13, characterized in that the element or at least one of the power elements (4; 4') is a hydraulic or electric power element and the motor (21) is a hydraulic motor or electric.

15. Motorized rolling vehicle equipped with a landscape maintenance machine, more particularly of the brush cutter or mower type, the landscape maintenance machine comprising a frame (8) mounted on the motorized rolling vehicle, characterized in that the landscape maintenance machine consists of a landscape maintenance machine according to any one of claims 1 to 14.

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