FR2549434A1 - Chassis of a straddling tractor - Google Patents

Chassis of a straddling tractor Download PDF

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Publication number
FR2549434A1
FR2549434A1 FR8312153A FR8312153A FR2549434A1 FR 2549434 A1 FR2549434 A1 FR 2549434A1 FR 8312153 A FR8312153 A FR 8312153A FR 8312153 A FR8312153 A FR 8312153A FR 2549434 A1 FR2549434 A1 FR 2549434A1
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FR
France
Prior art keywords
chassis
casing
legs
chassis according
gantry
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR8312153A
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French (fr)
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FR2549434B1 (en
Inventor
Charles Bobard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bobard Jeune SAS
Original Assignee
Bobard Jeune SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bobard Jeune SAS filed Critical Bobard Jeune SAS
Priority to FR8312153A priority Critical patent/FR2549434B1/en
Publication of FR2549434A1 publication Critical patent/FR2549434A1/en
Application granted granted Critical
Publication of FR2549434B1 publication Critical patent/FR2549434B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/16—Understructures, i.e. chassis frame on which a vehicle body may be mounted having fluid storage compartment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/18—Understructures, i.e. chassis frame on which a vehicle body may be mounted characterised by the vehicle type and not provided for in groups B62D21/02 - B62D21/17
    • B62D21/186—Understructures, i.e. chassis frame on which a vehicle body may be mounted characterised by the vehicle type and not provided for in groups B62D21/02 - B62D21/17 for building site vehicles or multi-purpose tractors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D49/00—Tractors
    • B62D49/06—Tractors adapted for multi-purpose use
    • B62D49/0607—Straddle tractors, used for instance above vine stocks, rows of bushes, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D49/00—Tractors
    • B62D49/06—Tractors adapted for multi-purpose use
    • B62D49/0678—Tractors of variable track width or wheel base

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Agricultural Machines (AREA)

Abstract

Chassis of a straddling tractor, characterised in that it comprises: a main framework constituted by two tank-caissons 1, 2, which are symmetrical, placed in each row of vines, on either side of the row which is straddled, these two caissons being coupled to each other by two transverse members 3, 4; two carrying cases 7, 8 welded at the rear of the two caissons 1, 2 and containing the transmission gearings; a crossbeam 9 welded at the rear of the two caisson-case units 1-7, 2-8, this crossbeam reinforcing the fitting of the two units whilst constituting an anti-roll bar and the support to the three point coupling; two tubular supports 5, 6 for the stays of the front wheels, traversing the front ends of the tank-caissons; two oblique rear stays 14, 15 forming a case for the transmissions, each fixed to one of the corresponding cases 7,8.

Description

La présente invention a pour objet un châssis pour tracteur enjambeur. The present invention relates to a chassis for a straddle tractor.

D'une façon générale, les châssis de tracteurs enjambeurs sont constitués par une plate-forme horizontale destinee à porter le moteur et le siège du conducteur et par quatre jambes reliées à ladite plate-forme et pratiquement perpendiculaires, les deux jambes avant portant les roues avant directrices et les deux jambes arrière étant creuses et servant de carter aux chaines de transmission de l'entraînement des roues arrière
Ces châssis sont lourds, de fabrication onéreuse et de surcroit particulièrement inesthétiques.In general, the chassis of straddle tractors are constituted by a horizontal platform intended to carry the engine and the driver's seat and by four legs connected to said platform and practically perpendicular, the two front legs carrying the wheels. front steering and the two rear legs being hollow and serving as a casing for the rear wheel drive transmission chains
These chassis are heavy, expensive to manufacture and moreover particularly unsightly.

Le chassis selon la présente invention est caractérisé par le fait qu'il comporte : une ossature principale constituée de deux réservoirs-caissons, symétriques, places dans chaque rangée de vigne, de part et d'autre du rang enjambé, ces deux caissons étant accouples l'un à l'autre par deux traverses dont l'une au moins est creuse et constitue un reservoir-caisson supplementaire ; un portique soudé à l'arrière des deux réservoirs-caissons, muni d'une traverse, ce portique renforçant l'assemblage des deux caissons tout en constituant un arceau de sécurité et le support de l'attelage trois points ; deux supports tubulaires pour les jambes avant, traversant les extrémités avant des reservoirs- caissons ; deux jambes arrière obliques, i qu faisant carter, fixées chacune à l'arrière du caisson correspondant par un demi-arbre. The chassis according to the present invention is characterized by the fact that it comprises: a main framework consisting of two symmetrical caisson tanks, placed in each row of vines, on either side of the spanned row, these two caissons being coupled to each other by two crosspieces, at least one of which is hollow and constitutes an additional caisson tank; a gantry welded to the rear of the two caisson tanks, provided with a cross member, this gantry reinforcing the assembly of the two caissons while constituting a roll bar and the support of the three-point hitch; two tubular supports for the front legs, crossing the front ends of the tank-boxes; two oblique rear legs, i qu making casing, each fixed to the rear of the corresponding box by a half-shaft.

A titre d'exemple non limitatif et pour faciliter la compréhension de l'invention, on a représente aux dessins annexés
Figure 1, une vue en élévation latérale d'un exemple de réalisation du châssis selon l'invention ;
Figure 2, une vue en perspective du châssis de la figure 1 ;
Figure 3, une vue en perspective d'une variante de réalisation du châssis des figures 1 et 2 ;
Figure 4, une vue de face du châssis de la figure 1. By way of nonlimiting example and to facilitate understanding of the invention, the accompanying drawings have been shown
Figure 1, a side elevational view of an embodiment of the chassis according to the invention;
Figure 2, a perspective view of the frame of Figure 1;
Figure 3, a perspective view of an alternative embodiment of the chassis of Figures 1 and 2;
Figure 4, a front view of the chassis of Figure 1.

Figures b et b deux vues en perspective d'une autre variante de réalisation du châssis. Figures b and b two perspective views of another alternative embodiment of the chassis.

En se reportant à ces figures, on voit que le châssis est constitue de deux caissons 1 et 2 qui sont symétriques et placés dans chaque rangée de vigne (figure 4), de part et d'autre du rang enjambé. Ces deux caissons sont creux et fabriqués de façon a être étanches et donc à pouvoir servir de réservoir, le caisson 1 servant de réservoir pour le liquide hydraulique, tandis que le caisson 2 sert de réservoir de carburant. Referring to these figures, it can be seen that the frame is made up of two boxes 1 and 2 which are symmetrical and placed in each row of vines (Figure 4), on either side of the spanned row. These two boxes are hollow and manufactured so as to be sealed and therefore able to serve as a tank, the box 1 serving as a tank for the hydraulic fluid, while the box 2 serving as a fuel tank.

Les deux caissons ont une section rectangulaire qui s'agrandit vers I'arrière, la largeur demeurant constante, mais la paroi inférieure étant oblique vers le bas, tandis que la paroi supérieure s 'élève en trois gradins. La séparation entre le premier et le second gradins forme un épaulement. Les deux épaulements des deux réservoirs-caissons 1 et 2 reçoivent une traverse 3, qui solidarise les deux réservoirs-caissons 1 t 2. The two boxes have a rectangular section which widens towards the rear, the width remaining constant, but the lower wall being oblique downwards, while the upper wall rises in three steps. The separation between the first and second steps forms a shoulder. The two shoulders of the two container tanks 1 and 2 receive a cross 3, which secures the two tank containers 1 t 2.

Une deuxième traverse 4, parallèle à la première est placée à la partie arriere desdits caissons afin de compléter la rigidification de l'ensemble. Depréférence, cette traverse est tubulaire et est fixée de manière étanche de façon à constituer elle-même un réservoir, pour contenir une réserve supplémentaire de carburant par exemple.A second cross 4, parallel to the first is placed at the rear part of said boxes in order to complete the stiffening of the assembly. Preferably, this cross member is tubular and is tightly fixed so as to itself constitute a tank, to contain an additional reserve of fuel for example.

En avant de la traverse-3, chacun des caissons 1 et 2 est traversé de part en part par un tube cylindrique 5 et 6, chacun de ces tubes constituant un support pour une jambe de roue. In front of the cross-3, each of the boxes 1 and 2 is traversed right through by a cylindrical tube 5 and 6, each of these tubes constituting a support for a wheel leg.

A l'arrière de chacun des caissons 1 et 2 est place un boîtier 7, 8. Ces deux boîtiers ont, comme les caissons 1 et 2 des parois suffisamment épaisses et rigides pour constituer des éléments porteurs. Chaque boîtier 7 et 8 porte un demi-arbre 20 entraîné par des pignonnages disposé a l'intérieur dudit boîtier qui joue ainsi le rôle d'un carter. At the rear of each of the boxes 1 and 2 is placed a box 7, 8. These two boxes have, like the boxes 1 and 2, sufficiently thick and rigid walls to constitute load-bearing elements. Each housing 7 and 8 carries a half-shaft 20 driven by sprockets arranged inside said housing which thus plays the role of a housing.

A l'arrière de l'ensemble formé par un réservoircaisson 1 ou 2 et un carter 7 ou 8, est fixé un portique9 constitué par deux montants lateraux 10 et 11 réunis à leur sommet par une traverse supérieure 12 et par une traverse intermédiaire 13. Ce portique sert à la fois à augmenter la rigidite du châssis et à fixer l'attelage trois points tout en constituant un arceau de protection pour le conducteur. At the rear of the assembly formed by a tank-casing 1 or 2 and a casing 7 or 8, is fixed a gantry 9 constituted by two lateral uprights 10 and 11 joined at their top by an upper cross member 12 and by an intermediate cross member 13. This gantry serves both to increase the rigidity of the chassis and to fix the three-point hitch while constituting a protective hoop for the driver.

A chacun des carters 7 et 8 est fixée une jambe 14 et 15 pour roue arrière motrice. To each of the casings 7 and 8 is fixed a leg 14 and 15 for the rear driving wheel.

Chaque jambe constitue un carter creux porteur à l'intérieur duquel sont disposés les moyens d'entraînement de la roue arrière motrice correspondante, une chaîne de transmission par exemple. Each leg constitutes a hollow carrier housing inside which are arranged the drive means of the corresponding driving rear wheel, a transmission chain for example.

Selon le mode de réalisation, representé à la figure 2, chacune des jambes 14 et 15 est fixée à son carter correspondant 7 ou 8 par trois axes 16, 17 et 18 qui encadrent l'orifice 19 traverse par le demi-arbre moteur 20. De préférence, chaque jambe peut coulisser le Tong des trois axes 16, 17 et 18, ce qui permet de rendre variable la voie arrière du tracteur. According to the embodiment, shown in FIG. 2, each of the legs 14 and 15 is fixed to its corresponding casing 7 or 8 by three axes 16, 17 and 18 which frame the orifice 19 traversed by the motor half-shaft 20. Preferably, each leg can slide the Tong of the three axes 16, 17 and 18, which makes it possible to make the rear track of the tractor variable.

Selon le mode de réalisation representé à la figure 3, chaque jambe 14 et 15 comporte un palier 21 pouvant à la fois coulisser et pivoter autour d'un tube 22, solidaire du carter 7 ou 8 correspondant, ce tube entourant le demi-arbre d'entrainement. On peut ainsi faire varier non seulement la voie des roues arrière du tracteur, mais l'angle des jambes 14 et 15, ce qui permet notamment d'obtenir une correction de devers. According to the embodiment shown in Figure 3, each leg 14 and 15 has a bearing 21 which can both slide and pivot around a tube 22, integral with the corresponding casing 7 or 8, this tube surrounding the half-shaft d 'training. It is thus possible to vary not only the track of the rear wheels of the tractor, but the angle of the legs 14 and 15, which in particular makes it possible to obtain a slope correction.

Les figures 5 et 6 représentent une autre variante de realisation du châssis. Figures 5 and 6 show another alternative embodiment of the chassis.

Comme on peut le voir sur ces figures, tous les éléments constitutifs du bâti du châssis sont faitS en une seule piece, c'est-à-dire que le caisson-reservoir 1, le carter 7 et lue montant correspondant du portique sont fai-tsen une seule pièce par mécano-soudure. As can be seen in these figures, all the constituent elements of the frame of the chassis are made in one piece, that is to say that the tank-reservoir 1, the casing 7 and the corresponding amount of the gantry are made tsen one piece by mechanical welding.

On obtient ainsi une meilleure rigidité du châssis tout en definissant un volume creux utile beaucoup plus important.  This gives better chassis rigidity while defining a much larger useful hollow volume.

Le châssis est alors formé de deux caissons monobloc A et B assemblés par les traverses 3, 4 et 13 qui ellesmêmes sont creuses et peuvent également servir de supplément de réserve. The chassis is then formed of two monobloc boxes A and B assembled by the crosspieces 3, 4 and 13 which themselves are hollow and can also serve as additional reserve.

Les jambes 14 et 15 sont portées par des moyens identiques à ceux decrits aux figures 1 et 3. Pour libérer du volume utile à l'arrière des caissons A ou B, les moyens de transmission peuvent être simplifiés grâce à une lunette étanche 23 servant au passage de l'arbre de transmission. The legs 14 and 15 are carried by means identical to those described in FIGS. 1 and 3. To release useful volume at the rear of the boxes A or B, the transmission means can be simplified by means of a sealed bezel 23 serving to transmission shaft drive.

Chacun des volumes creux unitaires A et B peuvent à volonté être cloisonnés, cela pour laisser passer des éléments mécaniques tels que, arbres et pignons soit pour diviser le volume creux ainsi obtenu en plusieurs compartiments pour en faire des réservoirs de liquide.  Each of the unitary hollow volumes A and B can be partitioned at will, this to allow mechanical elements such as, shafts and pinions to pass, or to divide the hollow volume thus obtained into several compartments to make them reservoirs of liquid.

Claims (8)

REVENDICATIONS 1. Châssis de tracteur enjambeur, caractérisé par le fait qu'il comporte : une ossature principale constituée de deux réservoirs-caissons (1, 2), symétriques, places dans chaque rangée de vigne, de part et d'autre du rang enjambe, ces deux caissons étant accouplés l'un à l'autre par deux traverses (3, 4) ; deux carters porteurs (7, 8) soudés à l'arrière des deux caissons (1, 2) et contenant les pignonages de transmission ; un portique (9) soudé à l'arrière des deux ensembles caissons-carters (1-7, 2-8), ce portique renforçant l'assemblage des deux ensembles tout en constituant un arceau de sécurité et le support de l'attelage trois points ; deux supports tubulaires (5, 6) pour les jambes de roues avant, traversant les extrémités avant des reservoirs-caissons ; deux jambes arrière obliques (14, 15) faisant carter pour les transmissions, fixées chacune à l'un des carters (7, 8) correspondant. 1. Straddle tractor chassis, characterized by the fact that it comprises: a main frame made up of two box-tanks (1, 2), symmetrical, placed in each row of vines, on either side of the straddle row, these two boxes being coupled to one another by two crosspieces (3, 4); two bearing housings (7, 8) welded to the rear of the two boxes (1, 2) and containing the transmission pinions; a gantry (9) welded to the rear of the two casing-housing assemblies (1-7, 2-8), this gantry reinforcing the assembly of the two assemblies while constituting a roll bar and the three-point hitch support points; two tubular supports (5, 6) for the front wheel legs, passing through the front ends of the container tanks; two oblique rear legs (14, 15) making casing for the transmissions, each fixed to one of the casings (7, 8) corresponding. 2. Châssis selon la revendication 1, dans lequel au moins l'une (4) des deux traverses (3, 4) joignant les caissons-reservoirs est elle-même creuse et etanche afin de constituer un reservoir supplémentaire. 2. Chassis according to claim 1, in which at least one (4) of the two crosspieces (3, 4) joining the caissons-reservoirs is itself hollow and waterproof in order to constitute an additional reservoir. 3. Châssis selon la revendication 1 ou 2, dans lequel chaque caisson (1, 2) a une section rectangulaire de largeur constante, mais dont la longueur augmente de l'avant vers l'arrière, la paroi inférieure étant oblique vers le bas et vers I'arrière, la paroi superieure s'élevant en gradins. 3. Chassis according to claim 1 or 2, in which each box (1, 2) has a rectangular section of constant width, but the length of which increases from front to rear, the lower wall being oblique downwards and towards the rear, the upper wall rising in steps. 4. Châssis selon l'une quelconque des revendications 1 à 3, dans lequel le portique (9) comporte une traverse supérieure (12) et une traverse intermédiaire (13). 4. Chassis according to any one of claims 1 to 3, in which the gantry (9) comprises an upper cross member (12) and an intermediate cross member (13). 5. Châssis selon 1 'une quelconque des revendications 1 à 4, dans lequel chaque jambe arriere (14, 15) est fixée au carter correspondant par des moyens permettant de faire varier l'écartement entre les deux jambes (14, 15) et donc la voie du tracteur. 5. Chassis according to any of claims 1 to 4, in which each rear leg (14, 15) is fixed to the corresponding casing by means making it possible to vary the spacing between the two legs (14, 15) and therefore the tractor track. 6. Châssis selon la revendication 5, dans lequel les moyens sont constitués par trois axes parallèles (16, 17, 18) encadrant l'orifice (20) par lequel le demi-arbre moteur pénètre dans le carter formé par la jambe. 6. Chassis according to claim 5, in which the means consist of three parallel axes (16, 17, 18) framing the orifice (20) through which the motor half-shaft enters the casing formed by the leg. 7. Châssis selon la revendication 5, dans lequel les moyens sont constitués par un tube porteur (22) solidaire du carter de transmission (7 ou 8)correspondant, ce tube s'engageant dans un palier (21) solidaire de la jambe (14 ou 15) et étant traversé intérieurement par le demi-arbre moteur correspondant 9 de telle sorte que l'on peut faire varier non seulement l'écartement des jambes (14 et 15) mais leur position angulaire par rapport au châssis. 7. Chassis according to claim 5, in which the means consist of a carrier tube (22) secured to the corresponding transmission casing (7 or 8), this tube engaging in a bearing (21) secured to the leg (14 or 15) and being internally traversed by the corresponding driving half-shaft 9 so that one can vary not only the spacing of the legs (14 and 15) but their angular position relative to the chassis. 8. lassis seion l'une quelconque aes revendications précédentes, dans lequel le caisson-reservoir (1, 2) le carter (7, 8) et le montant du portique (9, 10) est conformé en un caisson creux monobloc de sorte que le châssis est constitué de deux caissons creux monobloc (A-B) assemblés 1 un à l'autre par trois traverses (3, 4, 13) également creuses.  8. lassis seion any one of the preceding claims, wherein the tank-container (1, 2) the casing (7, 8) and the amount of the gantry (9, 10) is formed into a one-piece hollow box so that the chassis consists of two monobloc hollow boxes (AB) assembled 1 to one another by three crosspieces (3, 4, 13) also hollow.
FR8312153A 1983-07-22 1983-07-22 OVERFLOW TRACTOR CHASSIS Expired FR2549434B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8312153A FR2549434B1 (en) 1983-07-22 1983-07-22 OVERFLOW TRACTOR CHASSIS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8312153A FR2549434B1 (en) 1983-07-22 1983-07-22 OVERFLOW TRACTOR CHASSIS

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FR2549434A1 true FR2549434A1 (en) 1985-01-25
FR2549434B1 FR2549434B1 (en) 1988-12-02

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FR8312153A Expired FR2549434B1 (en) 1983-07-22 1983-07-22 OVERFLOW TRACTOR CHASSIS

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2570044A1 (en) * 1984-09-12 1986-03-14 Bobard Jeune Sa Ets IMPROVEMENTS ON STAKEHOLDERS
FR2610588A1 (en) * 1987-02-05 1988-08-12 Bobard Jeune Sa Ets Straddling tractor with adjustable track and attitude
FR2611639A1 (en) * 1987-03-06 1988-09-09 Bobard Jeune Sa Ets Straddling tractor with a raised rear end
FR2654404A1 (en) * 1989-11-10 1991-05-17 Bobard Jeune Sa Ets Improvements to straddling tractors
US5180025A (en) * 1991-12-13 1993-01-19 Yeh Bean Shung Wheeled-chair chassis with a suspension mechanism
WO2002099205A1 (en) 2001-05-31 2002-12-12 Shin Caterpillar Mitsubishi Ltd. Construction machine
WO2022013494A1 (en) * 2020-07-15 2022-01-20 Exel Industries Variable-gauge chassis for an agricultural machine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1183966A (en) * 1957-10-05 1959-07-16 Agricultural tractor chassis
US3179194A (en) * 1962-12-31 1965-04-20 Harold R Hunt Frame and wheel suspension arrangement for self-propelled plant sprayer
FR2195389A2 (en) * 1964-11-20 1974-03-08 Ballu Gabriel
FR2218759A5 (en) * 1973-02-21 1974-09-13 Delaille Roger
FR2234838A1 (en) * 1973-06-28 1975-01-24 Bodard Jeune Emile Bobard
FR2263928A1 (en) * 1974-03-14 1975-10-10 Bobard Jeune Et Bo Agricultural straddle vehicle frame - has inverted U shaped frame each side made from deep, tapered sections
FR2418738A1 (en) * 1978-03-01 1979-09-28 Derot Power-driven agricultural tool carrier - has engine unit mounted in rear frame with centre of gravity over rear axle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1183966A (en) * 1957-10-05 1959-07-16 Agricultural tractor chassis
US3179194A (en) * 1962-12-31 1965-04-20 Harold R Hunt Frame and wheel suspension arrangement for self-propelled plant sprayer
FR2195389A2 (en) * 1964-11-20 1974-03-08 Ballu Gabriel
FR2218759A5 (en) * 1973-02-21 1974-09-13 Delaille Roger
FR2234838A1 (en) * 1973-06-28 1975-01-24 Bodard Jeune Emile Bobard
FR2263928A1 (en) * 1974-03-14 1975-10-10 Bobard Jeune Et Bo Agricultural straddle vehicle frame - has inverted U shaped frame each side made from deep, tapered sections
FR2418738A1 (en) * 1978-03-01 1979-09-28 Derot Power-driven agricultural tool carrier - has engine unit mounted in rear frame with centre of gravity over rear axle

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2570044A1 (en) * 1984-09-12 1986-03-14 Bobard Jeune Sa Ets IMPROVEMENTS ON STAKEHOLDERS
EP0177375A1 (en) * 1984-09-12 1986-04-09 Bobard Jeune S.A. Straddle tractors
FR2610588A1 (en) * 1987-02-05 1988-08-12 Bobard Jeune Sa Ets Straddling tractor with adjustable track and attitude
FR2611639A1 (en) * 1987-03-06 1988-09-09 Bobard Jeune Sa Ets Straddling tractor with a raised rear end
FR2654404A1 (en) * 1989-11-10 1991-05-17 Bobard Jeune Sa Ets Improvements to straddling tractors
US5180025A (en) * 1991-12-13 1993-01-19 Yeh Bean Shung Wheeled-chair chassis with a suspension mechanism
WO2002099205A1 (en) 2001-05-31 2002-12-12 Shin Caterpillar Mitsubishi Ltd. Construction machine
EP1391562A1 (en) * 2001-05-31 2004-02-25 Shin Caterpillar Mitsubishi Ltd. Construction machine
EP1391562A4 (en) * 2001-05-31 2004-10-06 Caterpillar Mitsubishi Ltd Construction machine
WO2022013494A1 (en) * 2020-07-15 2022-01-20 Exel Industries Variable-gauge chassis for an agricultural machine
FR3112523A1 (en) * 2020-07-15 2022-01-21 Exel Industries VARIABLE TRACK CHASSIS FOR AGRICULTURAL MACHINERY

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Publication number Publication date
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