• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a straddle tractor (1) with an adjustable track (A) comprising a cabin (30) and a motor (31) mounted on a frame (20) and comprising tubular beams (6) which laterally cross the chassis to secure it. with side frames (10) carrying the wheels of the tractor, the ends of the beams being fixed to the side frames, the side frames receiving the mobile crews of the tractor, said mobile crews having oscillating arms which support the legs (7) carrying the wheels (40) of the tractor.
    公开号:FR3058380A1
    申请号:FR1660730
    申请日:2016-11-07
    公开日:2018-05-11
    发明作者:Jean-Luc Vermande
    申请人:VERMANDE SA；
    IPC主号:
    专利说明:

    (54) STAKEHOLDER TRACTOR.
    (57) The invention relates to a straddle tractor (1) with adjustable track (A) comprising a cabin (30) and a motor (31) mounted on a chassis (20) and comprising tubular beams (6) pass laterally through the chassis. for securing it to the side frames (10) carrying the tractor wheels, the ends of the beams being fixed to the side frames, the side frames receiving the mobile equipment of the tractor, said mobile equipment comprising oscillating arms which support legs (7) bearing the wheels (40) of the tractor.
    STAKEHOLDER TRACTOR
    Field of the invention
    The present invention relates to a straddle tractor with adjustable track and height.
    Technological background
    The useful path between the right and left legs of a straddle tractor is important for its use, as is the height under the tractor.
    Straddle tractors have a useful width between wheels depending on equipment such as brakes, suspension and devices for maneuvering the direction of the wheels.
    Brief description of the invention
    The present invention provides an adjustable track straddle tractor comprising a cabin and an engine mounted on a chassis devoid of wheels, the latter being carried by support frames external to the chassis.
    To connect the frames to the chassis, the tractor has tubular beams that cross the chassis laterally. The beams secure the chassis to the side frames carrying the tractor wheels. The ends of the beams are fixed to the lateral frames, the lateral frames receive the mobile equipment of the tractor and the mobile equipment comprises oscillating arms which support the carrying legs of the wheels of the tractor.
    Preferably, each lateral frame carries a lateral assembly front wheel rear wheel.
    Advantageously, the track of the tractor is adjustable, the tubular beams comprising sliding tubes forming telescopic transverse axes for adjusting the width of the track of the tractor, the sliding tubes being provided with jacks for bringing the lateral frames in or away from the side frames. tractor chassis.
    The swinging arms are advantageously produced in the form of longitudinal deformable parallelograms arranged in a vertical plane and which connect the wheel-carrier legs to the side frames.
    According to a particular embodiment, the parallelograms consist of a first branch at the level of a sheath for receiving the axis of the wheel carrier leg, a second branch part of a lateral frame and two longitudinal connecting branches between the branch part of the frame and the bearing branch of the wheel axle.
    The connecting branches are preferably articulated on the branch carrying the axis of the leg and on the branch part of the frame so that the parallelograms are deformable.
    The second branch advantageously forms part of an upper beam of the frame.
    According to an advantageous embodiment, the suspension of the tractor is positioned above the frames. The suspension preferably comprises jacks which hang on the one hand on the top of the frames and on the other hand on rods secured to the oscillating arms and in particular, on the upper longitudinal branch of the parallelograms.
    The rods form lever arms around the carrying axes of the upper connecting branches for raising and lowering the tractor chassis relative to the carrying axes of the wheels and carrying out the suspension.
    Preferably, the axes of the wheel legs are actuated in rotation by a rod and a hydraulic steering cylinder which has a first end connected to the frame and a second end actuating the rod in rotation.
    Each wheel is preferably equipped with a hydraulic motor which is fixed on the legs and the rotating part of which is disposed in the hub of the wheel.
    More particularly, the wheel legs have a steering axis located above the wheel, an upright forming the leg disposed laterally relative to the wheel and carrying at the wheel hub the hydraulic motor and a brake drum.
    the suspension of the tractor advantageously comprises a cylinder for each wheel, each cylinder being controlled by a proportional distributor, the cylinders of the same axle being connected to one or more shock absorbers such as nitrogen spheres and a distributor device adapted to put in communication or isolating said jacks from the same axle, the suspension controlled by an electronic computer thus making it possible to perform functions of adjustable height of the tractor, adjustable attitude and tilt compensation and adaptation of the damping of the suspension.
    Brief description of the drawings
    Other characteristics and advantages of the invention will become apparent on reading the following description of a nonlimiting example of embodiment of the invention with reference to the drawings which represent:
    In Figure 1: a perspective view from above of a straddle tractor of the invention;
    in Figure 2: a side view of a frame of the tractor of Figure 1;
    in Figure 3: a perspective view of the frame of Figure 2;
    in Figure 4: an exploded view of a detail of the frame of Figure 2;
    in FIG. 5: a simplified diagram of the hydraulic steering and suspension equipment of the tractor;
    in FIG. 6: a simplified diagram of the engine and hydraulic brake equipment of the tractor;
    in Figure 7: a more detailed diagram of the hydraulic suspension equipment.
    Detailed description of embodiments of the invention
    According to Figure 1, the present invention proposes to produce a straddle tractor 1 with adjustable track A. An object of the invention is to minimize the organs positioned at the wheels of the straddle tractor 1 so as to increase the space available between them.
    The straddle tractor comprises a cabin 30 and a motor 31 mounted on a chassis 20. The chassis can also support a tank for the engine, accessories for agricultural work such as tool arms, one or more tanks for phytosanitary products or other equipment useful for working the soil.
    As seen above, the tractor wheels are carried by lateral frames 10 and tubular beams 6 laterally cross the chassis to secure it with the lateral frames 10.
    The track of the tractor is adjustable and to do this, the tubular beams 6 comprise sliding tubes 6a, 6b of hydraulic cylinders which allow the side frames to be brought closer or further away from the central chassis of the tractor.
    The sliding tubes 6a, 6b form telescopic transverse axes for adjusting the track width of the tractor and their ends are fixed to the lateral frames 10.
    The side frames 10 receive the mobile components of the tractor. The moving parts comprise oscillating arms which support the carrying legs 7 of the wheels 40 of the tractor.
    FIG. 2 represents one of the side frames 10 seen from the side with the oscillating arms and the legs 7 of the wheel carriers 40. Each frame is provided with a side assembly front wheel rear wheel.
    The swinging arms are produced in the form of longitudinal deformable parallelograms 4a, 4b, 4c, 4d arranged in a vertical plane. The parallelograms make it possible to connect the wheel carrier legs to the side frames 10.
    The parallelograms more particularly detailed in FIG. 4 comprise a first branch 4a constituted by a sheath for receiving an axis 41 of the wheel carrier leg 7, a second branch 4b part of a lateral frame 10 and two connecting branches 4c, 4d longitudinal between the branch part of the frame and the branch 4a carrying the wheel axle.
    The branch 4b is part of an upper beam 5 of the frame 10.
    The branch 4a is constituted by a sheath receiving the wheel axle 41
    The connecting branches 4c, 4d are articulated on the branch 4a at the level of flanges 42a, 42b at the top and bottom of the sheath 4a.
    At the level of the frame, the upper branch 4d is articulated on the tube axis 60 of the tubular beams 6 on the beam 5. The lower branch 4c is for its part articulated on an added axis 52 on the beam 5, the center distance between the axes 60 and 51 forming the vertical branch 4b.
    To reduce the size of the tractor legs, the suspension of the tractor is offset above the frames 10. The suspension is produced by jacks 3 which hook on the one hand on axes 51a carried by ears 51 on the top of the beams 5 and on the other hand on axes 401a carried by rods 401 secured to the longitudinal upper branch 4d of the parallelograms as shown in FIG. 4. The jacks act on the parallelograms and the variations in height of the tractor are carried out by the deformation of the parallelograms.
    The rod 401 forms a first arm of a lever around the axis 60 carrying the upper connecting branch 4d, which forms the second arm of the lever, for raising and lowering the chassis of the tractor relative to the legs and the wheels in the direction B of figure 1.
    The cylinders 3 for adjusting the height of the tractor and for suspension are hydraulic cylinders allowing the suspension to be produced by expansion compression around an equilibrium position which defines the height of the tractor. For the suspension, the hydraulic circuit of the cylinders is connected to one or more accumulating spheres as shown in Figure 5.
    The axes 41 are actuated in rotation by a steering cylinder 2 and are extended downwards by the legs 7 on which the wheel hubs are fixed. According to Figure 4 each wheel is equipped with a hydraulic motor 75 which is fixed on the legs 7 and whose rotating part is disposed in the hub of the wheel.
    This single link leg system is very favorable for reducing the overall width of the assembly: the axle 41 is located above the wheel and the offset leg 7 is connected to said axle and to the hub of the wheel. The wheel hub carries the hydraulic motor 75 and the brake drum 74 while the steering device 2 and the suspension devices 3, 4a, 4b, 4c, 4d are offset above the wheel axles.
    In addition, the leg 7 is hollow and has an opening 71 for passage of the hydraulic hoses of the hydraulic motor and the brakes, which protects them.
    Still according to FIG. 4, the axes 41 of the wheel legs are articulated in rotation at one end of the parallelograms in order to make the wheels directional.
    They are received in a sheath forming the branch 4a of the parallelogram provided with flanges 42a; 42b. In the upper part of the axis 41 is fixed a link 2a intended to rotate the axis 41 in the sleeve to achieve the direction.
    To do this, the link 2a and operated by a hydraulic cylinder 2 which has a first end connected to an arm 42 and a second end actuating the link 2a in rotation.
    A finger 72 between stops 73 limits the possibilities of rotation of the legs 7 carrying the wheels.
    The tractor hydraulic system is partially shown in Figure 5.
    In the embodiment presented, all the wheels are directional which gives great agility to the tractor.
    The tractor comprises a combined suspension / height adjustment produced by the jacks 3 which act as suspension and height adjustment of the tractor.
    To further reduce the width of the wheel assemblies, the brakes are arranged inside the wheel hub and protected by the latter.
    For their part, the frames 10 as shown in FIG. 3 form frames which can receive a storage chest or a reservoir 80 for phytosanitary or other products.
    FIG. 5 schematically represents a part of the hydraulic circuit of a tractor according to the invention as regards the height adjustment of the tractor and its direction.
    The front steering comprises a distributor 200 adapted to control the front steering cylinders 201, 202. The rear steering comprises two cylinders 211, 212 acting on the rear wheels in response to the position of the front wheels to make the tractor more maneuverable.
    The combined suspension / height adjustment device comprises front right suspension cylinders 301 and front left 302 and rear right suspension cylinders 311 and rear left 312.
    The damping of the suspension in compression is here carried out by means of shock absorbers of the nitrogen spheres type 303, 304. Additional nitrogen spheres 305 common to the two cylinders of an axle ensure, as the case may be, rebound damping. To provide more flexible damping, the additional spheres 306 can be connected to the circuit of the spheres 303 and 304 by means of a distributor or hydraulic block 300 for communication or separation of the circuits of the right and left jacks of the same axle. . The device 300 includes solenoid valves arranged so as to allow the pressurization of the jacks, to separate them, to connect them, to open or to close the circuits supplying the spheres 306 according to the function or functions implemented.
    The rear suspension likewise comprises spheres and a distributor device 310 for placing in communication or for separating the circuits of the rear right and rear cylinders 311.
    All of the hydraulic members are connected to a control and distribution circuit 400 which is shown in FIG. 7.
    Each suspension cylinder is controlled from a proportional distributor, distributor 401 for the right front cylinder 301, distributor 402 for the left front cylinder 302, distributor 411 for the right rear cylinder 311 and distributor 412 for the left rear cylinder 312. The proportional distributors are controlled by an electronic computer, not shown so as not to overload the diagram, by means of PWM signals in a manner known per se. The proportional distributors are supplied with hydraulic pressure by a common 420 power supply unit connected to the hydraulic pumps.
    The parallel control of the distributors will make it possible to perform height adjustment functions, an anti-tilt function and a trim correction function by means of sensors such as an accelerometer, an inclinometer and possibly an electronic computer.
    The computer also controls the distribution devices 300, 310 depending on the operating mode chosen, independent wheels, anti-roll, rigid axle, attitude correction by coupling in the latter case the front rear settings or by making other settings according to the configuration of the terrain.
    Separate control of the suspension cylinders 301, 302, 311, 312 by dedicated proportional distributors 401, 402, 411, 412 and the presence of distribution devices 300, 310 allowing the separation or the communication of the cylinders of the same axle allow the suspension to be adapted to multiple situations depending on the configuration of the terrain on which the tractor is traveling and the operator's comfort.
    FIG. 6 represents a simplified diagram of hydraulic motors and brakes of a tractor according to the invention.
    The front right 501 and left 502 engines are coupled to drum brakes 503, 504 while the right rear 511 and rear left 512 engines are equipped with parking brakes 513, 514.
    As with the suspension / steering, the motors and brakes are controlled by distribution systems of known type and supplied by pumps driven by a heat engine. To give an idea, the heat engine can be a diesel engine with a power of 100 to 150 kWh and the pumps pumps with a displacement between 50 cm 3 and 100 cm 3 and capable of delivering a power of 400 bars to 500 bars.
    The hydraulic motors can for example be motors of the MSE08 type from the company Poclain. It is in particular possible to use a hydraulic pump to supply the motors of the front wheels and a hydraulic pump to supply the motors of the rear wheels.
    The invention defined by the appended claims is not limited to the example shown and in particular the suspensions can be controlled electronically to vary their stiffness by varying the number of spheres connected to the hydraulic circuit, the spheres being able to be set in or off by means of solenoid valves.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    1 - Straddle tractor (1) with adjustable track (A) comprising a cabin (30) and a motor (31) mounted on a chassis (20) characterized in that it comprises tubular beams (6) laterally pass through the chassis for securing it to the side frames (10) carrying the tractor wheels, the ends of the beams being fixed to the side frames, the side frames receiving the mobile equipment of the tractor, said mobile equipment comprising oscillating arms which support carrying legs (7) wheels (40) of the tractor.
    [2" id="c-fr-0002]
    2 - straddle tractor according to claim 1 for which each lateral frame carries a lateral assembly front wheel rear wheel.
    [3" id="c-fr-0003]
    3 - straddle tractor according to claim 1 or 2 for which the tractor's track is adjustable, the tubular beams (6) comprising sliding tubes (6a, 6b) forming telescopic transverse axes for adjusting the track width of the tractor, the sliding tubes being fitted with cylinders for bringing the side frames in or away from the chassis (20) of the tractor.
    [4" id="c-fr-0004]
    4 - straddle tractor according to any one of claims 1 to 3 for which the swinging arms are made in the form of longitudinal deformable parallelograms (4a, 4b, 4c, 4d) arranged in a vertical plane and which connect the door-to-wheel legs to the frames side (10).
    [5" id="c-fr-0005]
    5- straddle tractor according to claim 4 for which the parallelograms are constituted by a first branch (4a) at the level of a sheath for receiving the axis (41) of the leg (7) of the wheel carrier, a second branch (4b ) part of a lateral frame and two connecting branches (4c, 4d) longitudinal between the branch part of the frame and the branch (4a) carrying the wheel axle, and for which the connecting branches (4c, 4d) are articulated on the branch (4a) carrying the axis of the leg and on the branch (4b) part of the frame so that the parallelograms are deformable.
    [6" id="c-fr-0006]
    6- straddle tractor according to claim 4 or 5, for which the suspension of the tractor is positioned above the frames (10), the suspension comprising jacks (3) which hook on the one hand on the top of the frames and d on the other hand on rods (401) integral with the longitudinal upper branch (4d) of the parallelograms and which form lever arms around the axes (60) carrying the upper connecting branches (4d) for raising and lowering the chassis of the tractor relative to the load-bearing axles of the wheels and realize the suspension.
    [7" id="c-fr-0007]
    7- straddle tractor according to any one of the preceding claims for which the axes (4a) of the wheel legs are actuated in rotation by a connecting rod (2a) and a hydraulic steering cylinder (2) which has a first end connected to the frame and a second end actuating the rod in rotation.
    [8" id="c-fr-0008]
    8- straddle tractor according to any one of the preceding claims for which each wheel is equipped with a hydraulic motor (43) which is fixed on the legs (7) and whose rotating part is disposed in the hub of the wheel.
    [9" id="c-fr-0009]
    9 - straddle tractor according to claim 8 for which the wheel legs have a steering pin (4a) located above the wheel, an upright forming the leg (7) disposed laterally relative to the wheel and bearing at the hub of the wheel the hydraulic motor (75) and a brake drum (74).
    [10" id="c-fr-0010]
    10- Straddle tractor according to any one of the preceding claims for which the suspension of the tractor comprises a jack (301, 302, 311, 312) for each wheel, each jack being controlled by a proportional distributor (401,402, 411,412), the jacks of the same axle being connected to one or more dampers such as nitrogen spheres (303, 304, 305, 306) and a distributor device (300, 310) adapted to put in communication or isolate said jacks from the same axle, the suspension controlled by an electronic computer, thus making it possible to perform functions of adjustable height of the tractor, adjustable trim and tilt compensation and adaptation of the damping of the suspension.
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    类似技术:
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    同族专利:
    公开号 | 公开日
    HUE051539T2|2021-03-01|
    ES2820355T3|2021-04-20|
    EP3318430A1|2018-05-09|
    EP3318430B1|2020-06-17|
    FR3058380B1|2019-07-19|
    RS60839B1|2020-10-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US6311795B1|2000-05-02|2001-11-06|Case Corporation|Work vehicle steering and suspension system|
    FR2979322A1|2011-08-26|2013-03-01|Sarl Grosjean Rene Viticole|Vehicle quadric-cycle motorized high clearance tractor, has control circuit connected to jacks of suspension part of bearing half-trains, where jacks are equipped with left front bearing and right rear bearing to ensure operation of bar|
    US20150102568A1|2013-10-14|2015-04-16|Agco Corporation|Machine suspension and height adjustment|
    US20150291233A1|2014-04-09|2015-10-15|Hagie Manufacturing Company|Variable tread width vehicle|
    EP3025940A1|2014-10-23|2016-06-01|BGroup S.p.A.|Variable-track chassis, particularly for agricultural machines and equipment|
    FR3031069A1|2014-12-26|2016-07-01|Le Loulay|VEHICLE EQUIPPED WITH SPEED CORRECTION AND STEERING CONTROL SYSTEMS FOR A WHEEL ASSEMBLY, AND SUCH A SYSTEM|
    US10967695B2|2018-03-02|2021-04-06|Blueline Mfg., Co.|Steerable suspension system|
    FR3082169B1|2018-06-08|2020-12-04|Cybelium Tech|ADJUSTABLE WIDTH AGRICULTURAL VEHICLE CHASSIS AND AGRICULTURAL VEHICLE|
    FR3084873B1|2018-08-08|2020-07-10|Sabi Agri|TRACTOR WITH PIVOTING WHEEL HOLDER|
    AU2019388952A1|2018-11-27|2021-05-27|Agro Intelligence Aps|An agricultural work vehicle|
    法律状态:
    2017-11-30| PLFP| Fee payment|Year of fee payment: 2 |
    2018-05-11| PLSC| Publication of the preliminary search report|Effective date: 20180511 |
    2019-11-29| PLFP| Fee payment|Year of fee payment: 4 |
    2020-11-27| PLFP| Fee payment|Year of fee payment: 5 |
    2021-11-30| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1660730|2016-11-07|
    FR1660730A|FR3058380B1|2016-11-07|2016-11-07|TRACTOR ENJAMBEUR|FR1660730A| FR3058380B1|2016-11-07|2016-11-07|TRACTOR ENJAMBEUR|
    EP17200241.2A| EP3318430B1|2016-11-07|2017-11-07|High-clearance tractor|
    RS20201110A| RS60839B1|2016-11-07|2017-11-07|High-clearance tractor|
    HUE17200241A| HUE051539T2|2016-11-07|2017-11-07|High-clearance tractor|
    ES17200241T| ES2820355T3|2016-11-07|2017-11-07|Straddle tractor|
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