||Mähmaschine mit einer Zutritttüre und einer Deichsel
||Deere & Company, Moline, Ill., US
||Stephenson, Roger Dale, 52501, Ottumwa, US;
Fish, Darwin Daniel, 52501, Ottumwa, US
||derzeit kein Vertreter bestellt
||AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LI, LT, LU, MC, NL, PL, PT, RO, SE, SI, SK, TR
|Sprache des Dokument
|EP date of grant
|Veröffentlichungstag im Patentblatt
A01D 34/81(2006.01)A, F, I, 20051017, B, H, EP
The present invention relates to a Mower including a carrier
frame being supported on ground wheels, a tongue having a region mounted to said
carrier frame for pivoting about an upright axis, a housing including an access
door being mounted for pivoting vertically from a working position to an open position
wherein said door is in a path of movement of said tongue when the latter is pivoted.
The rotary cutter bar of many rotary mowers or mower conditioners
are contained within a housing which includes a door comprising a rectangular panel
which is disposed generally horizontally when closed, and a curtain coupled in depending
relationship to a forward edge of the panel so as to extend vertically across the
front of the machine. The curtain is pushed back by the standing crop, as the mower
advances, to allow the crop to be cut. The curtain provides shielding for the operator
and bystanders from foreign objects which are engaged and propelled by the rotating
cutting discs. The curtain and door assembly is typically hinged at the top of the
housing so as permit the curtain and door assembly to be raised to allow better
access for service of the cutter bar area of the machine. In some cases, this door
and curtain assembly can be damaged by accidentally leaving the door open and effecting
an operation which results in the tongue sweeping into the zone occupied by the
open access door.
Some designs address the above-noted problem by designing
the door such that by unhooking one end of the door support, the operator may pivot
the door out about a vertical axis and then lay the door on the ground. This approach
is used by the Vermeer Mfg. Co. on their Model 620 Mower-Conditioner and has the
drawback that, once the servicing of the cutter bar is complete, the operator must
pick the door up, pivot the door back into place and then fasten the door in place.
Other designs allow the tongue to pass over the door by
mounting the tongue to the carrier frame at a height which results in the tongue
structure being located higher than the opened door. This approach is used by Deere
& Company on the JD 946 and 956 Center Pivot Mower-Conditioners. The problem with
this approach is that the high location of the tongue introduces higher forces into
the carrier frame which must require heavier structure to compensate for them.
The problem to be solved with the invention is seen in
the awkward or expensive way designs are made today to avoid damaging the access
door by means of the tongue.
According to the present invention, there is provided an
improved mower which permits the tongue to be mounted at a relatively low location
on the carrier frame without having to be concerned about damaging an open access
This object is achieved, in accordance with a first embodiment
of the invention, by providing an operative connection between the tongue and the
access door defined by a door engaging structure carried by the tongue and against
which the door may rest when the door is opened, with the door engaging structure
being shaped such that it causes the door to be moved from the path of movement
of tongue in response to contact between the door engaging structure and the tongue
caused by the tongue being swung toward the door. The tongue may be swung by any
means, like manually or hydraulically.
In accordance with a second embodiment of the invention,
this object is achieved by providing an operative connection between the tongue
and access door which is defined by a linkage coupled between the tongue and the
access door such that the linkage will close the door when the tongue moves toward
the open door. Such linkage may comprise stiff rods, cables, links etc.
The object is achieved, in accordance with a third embodiment
of the invention by providing an operative connection between the tongue and the
access door which is defined by a hydraulic circuit including a hydraulic door cylinder
coupled to the access door and coupled in circuit with the tongue swing cylinder
such that, when a control valve for the tongue cylinder is actuated to swing the
tongue toward the open access door, the door cylinder operates to close the access
door prior to the swing cylinder operating to swing the tongue.
This and other objects will become apparent with a reading
of the ensuing description together with the appended drawings.
- FIG. 1
- is a left front perspective view of a mower showing the tongue in an outward
working position, showing the access door and associated safety curtain in a lowered
working position and showing the tongue equipped with a door engaging structure,
in accordance with a first embodiment of the invention.
- FIG. 2
- is a view like FIG. 1, but showing the access door in a raised open position
wherein it rests against the door engaging structure.
- FIG. 3
- is an enlarged right rear perspective view of a portion of the structure shown
in FIG. 2.
- FIG. 4
- is a view similar to that of FIG. 3 but showing a linkage connected between
the tongue and the access door in accordance with a second embodiment of the invention.
- FIG. 5
- is a schematic representation of a third embodiment of the invention showing
a hydraulic door-operating cylinder coupled to the door and to the hydraulic tongue
swing cylinder in a hydraulic circuit.
Referring now to FIGS. 1-3, there is shown a mower 10 in
the form of a side-pull mower-conditioner including carrier or main frame 12 including
a cross beam 14 extending transversely to a normal direction of travel and having
opposite ends joined to depending wheel-support legs 16. Wheel support arms 18 are
respectively pivoted to lower ends of the legs 16 by pins 19, with only the left-hand
arm 18 being shown. Hydraulic wheel actuating cylinders 20 are coupled between brackets
provided at upper rear locations of the legs 16 and rear ends of the wheel support
arms 18. Ground wheels 21 are mounted to the rear ends of the wheel support arms
The main frame 12 further includes a draft tongue support
structure 22 which is joined to, and projects forwardly from, a leftward region
of the cross beam 14, however, the particular location of the tongue support structure
on the beam 14 is not important to the present invention. A draft tongue 24 has
a rear end coupled to a forward end of the support structure 22 by a vertical pin
26 which establishes an upright axis about which the tongue 24 may pivot horizontally.
Coupled between the support structure 22 and the draft tongue 24 is an extensible
and retractable hydraulic cylinder 28, with the latter being shown in a fully retracted
position wherein it positions the tongue 24 in a leftmost working position. It is
to be noted that basic aspects of the present invention require only that the tongue
24 somehow be swung about the axis of the pin 26. For example, in lieu of the cylinder
28, any well-known remotely releasable coupling could be established between the
tongue 24 and beam 14, which when released permits the tongue 24 to pivot about
the pin 26 by driving the towing tractor in an appropriate direction to effect swinging
of the tongue 24 in a desired direction.
A crop harvesting platform 30 includes a platform frame
32 including opposite side walls 34 joined by a rear frame structure 36. The frame
32 is suspended from the carrier frame 12 by a three-bar linkage including a lower
pair of links 38 and an upper link 40. The lower pair of links 38 is respectively
located at opposite sides of the platform 30 and has rear ends respectively pivotally
coupled to the pair of wheel support arms 18 and have front ends respectively pivotally
coupled to lower rear locations of the platform frame structure 36. A pair of counterbalance
springs 42 have upper ends respectively coupled to upper front locations of the
pair of legs 16 and have lower ends respectively coupled to lower rear locations
of the platform frame member 36.
Thus, it will be appreciated that the platform 30 may be
moved between a lowered working position and a raised transport position through
operation of the hydraulic cylinders 20 for adjusting the wheels 21 relative to
the frame 12.
The platform 30 includes a forward, generally horizontal
top wall which extends between the opposite side walls 34. The top wall includes
a relatively narrow, fixed rear rectangular section 44 and a front rectangular section
including a minor, fixed left-hand portion 48, and a major right-hand portion forming
an access door 50 that is mounted to a forward edge of the rear section 44 by a
horizontal hinge assembly 52 that allows the door 50 to pivot vertically. Fixed
to a forward edge of the access door 50 is a flexible shield 54 that hangs vertically
in front of a rotary cutter bar (the cutter bar has been omitted from FIG. 2 for
the sake of simplicity) when the platform 30 is not in use. A flexible shield 56
is likewise mounted to a forward edge of the top wall left-hand minor portion 48.
Thus, it will be appreciated that when it is desired to gain access to the rotary
cutter bar located within the enclosure defined by the top wall portion 50 and the
flexible shield 54. This may be done by pivoting the access door 50, together with
the flexible shield 54, upwardly about the hinge assembly 52 from its operative
position, shown in FIG. 1, to its open position, shown in FIG. 2.
Up to this point, the described structure is conventional.
The present invention comes into play when the access door
50 is swung into its open position. Specifically, fixed to a lower right-hand surface
location of a rear region of the tongue 24 is a triangular door engaging plate or
member 60. The door engaging plate 60 may be of any effective shape and is here
shown as having a shape of a right triangle, with the hypotenuse being fixed along
the tongue 24, with the sides forming the right angle being located behind an upper
left-hand corner of the access door 50, and with an edge 62 of the plate 60 extending
forwardly from the right angle and making an angle of about 30° with the tongue
24. The edge 62 is engaged by, and supports the open access door 50 in a disposition
where it is inclined gradually to the rear from the hinge assembly 52. The edge
62 is so disposed relative to the access door 50, that as the tongue 24 is swung
toward the door 50, the door 50 is pivoted forwardly and closed before it is contacted
by the tongue 24 itself. Therefore, if an operator should inadvertently leave the
access door 50 in its open position and then resume an operation where it is desired
to reposition the mower 10 relative to the towing tractor by swinging the tongue
24 toward the open access door 50, such an operation can be done without damaging
the door 50 by engaging it with the tongue 24 since the door 50 will close before
such an engagement occurs. While it is convenient in the disclosed embodiment for
the door engaging plate 60 to be used to support the open access door 50, it will
be appreciated that the door 50 may be supported in its open position by other structure.
Referring now to FIG. 4 there is shown an alternate embodiment
here like structure is indicated by the same reference numerals given above. The
only difference in structure is that instead of providing the tongue 24 with a door
engaging plate 60, a linkage 66 is mounted between the tongue 24 and a central location
of the access door 50. Specifically, the linkage 66 includes a link 68 having a
left-hand end pivotally mounted, as at an upright pin 70, to a pair of vertically
spaced ears 71 fixed to the tongue 24. A bell-crank 72 is mounted to the rear section
44 of the top wall of the platform 30 for pivoting about an upright pin 74 located
to the rear of a central location of the access door 50. The bell-crank 72 includes
a relatively short leg, which carries a swivel-eye 76 in which the link 68 is mounted
for free sliding movement, the short leg being joined to, and making an angle of
about 90° with, a relatively long leg which carries a roller 78 at its free
end. As considered when the tongue 24 is in its left-most position and with the
access door 50 open, as shown in FIG. 4, the short leg of the bell-crank 72 ends
generally perpendicular to the door 50 while the long leg of the bell-crank 72 extends
generally parallel to the access door 50 with the roller 78 engaging the open access
door 50. An abutment 80, which may be defined by a washer secured to the rod 68,
is positioned for engaging the swivel-eye 76 so as to cause the bell-crank 72 to
pivot resulting in the roller 78 being swung forwardly a distance sufficient for
closing the door 50 when the tongue 24 is swung toward the door. The length of the
rod 68 which extends beyond the swivel-eye from the tongue ensures that the rod
will remain within the swivel-eye 76 during operation with the door 50 in its closed
operating position. The relative lengths of the short and long legs of bell-crank
72 ensures that sufficient motion will be imparted to access door 50 by the pivoting
bell-crank 72 in response to movement of the tongue 24 for closing the access door
50 prior to the tongue reaching the door when swung toward it. For a simpler solution,
the link 68 could be pivotally coupled directly to short leg of the bell-crank 72.
This would result in the bell-crank 72 pivoting when the tongue 24 is swung subsequent
to the door 50 being closed.
Referring now to FIG. 5, there is shown a schematic of
a third embodiment of the invention. The difference between this embodiment and
the second embodiment is that instead of connecting a linkage between the tongue
24 and the access door 50 to ensure that the latter is closed prior to being engaged
and possibly damaged by the tongue when the door 50 is inadvertently left open and
the tongue 24 is swung toward the door 50, a hydraulic door closing cylinder 82
is mounted between respective central regions of the top wall section 44 and door
50. The rod end of the cylinder 82 is coupled to the door 50 through the agency
of a bracket 84 fixed to the door 50 and containing, as considered when the access
door 50 is closed, a fore-and-aft elongated, lost motion slot 86, having a purpose
explained below. The rod end of the cylinder 82 is equipped with a clevis that straddles
the bracket 84 and is coupled to it by a pin 88 located in the lost motion slot
86, with the pin 88 being located in the remote end of the slot 86 when the door
50 is open, as shown in the drawing.
For effecting operation of the door closing cylinder 82
in response to the tongue swing cylinder 28 being operated to swing the tongue 24
toward the open access door 50, there is provided a hydraulic circuit 90 including
a hydraulic pump 92 and sump 94 coupled to a four-way, three-position control valve
96 having a first port coupled by a first branched supply/return conduit 98 to respective
rod ends of the tongue cylinder 28 and a door closing cylinder 82. A second branched
supply/return conduit 100 couples a second port of the control valve 96 to the head
end of the door closing cylinder 82 and to a priority valve 102 including a first
path to the head end of the tongue cylinder 28, which is blocked in the direction
of the cylinder 28 by a check valve 104, and a second route to the head end of the
cylinder 28, which is normally blocked by a pressure-responsive valve 106.
In operation, assuming that the access door 50 has been
inadvertently left open and that the operator has resumed operation and desires
to reposition the mower 10 relative to the towing tractor, the valve 96 will be
shifted upwardly from its neutral position shown in FIG. 5. Pressure fluid will
immediately be routed to the head end of the door closing cylinder 82 so as to pressurize
the head end of the door cylinder 82 while the rod end is coupled to the sump 94.
No pressure fluid will at this time be routed to the tongue cylinder 28 since the
pressure responsive valve 106 of the sequencing valve 102 will block flow to the
head end of the tongue swing cylinder 28. The door 50 will close upon only a partial
extension of the cylinder 82 taking place. When the cylinder 82 has become fully
extended, the pressure in the conduit will rise and cause the pressure responsive
valve 106 to shift to its open position. The tongue swing cylinder 28 will then
extend to swing the tongue 24 to the desired position whereupon the operator will
return the control valve 96 to its neutral position. Thereafter, the valve 96 may
be shifted to cause other desired movements of the tongue 24 with the door closing
cylinder 82 extending or retracting without effecting the position of the closed
access door 50 due to the lost motion slot 86. Because the tongue swing cylinder
28 and the door closing cylinder 82 are coupled in parallel, and the resistance
to movement offered by the door 50 is much less than the force required to swing
the tongue 24, it may be possible to eliminate the sequencing valve 102 since the
cylinder 82 would normally extend prior to the cylinder 28 extending.
Mäher (10) mit einem Trägerrahmen (12), der auf Grundrädern
(21) gestützt wird, einer Deichsel (24) mit einem Bereich, der an den Trägerrahmen
(12) montiert ist, um um eine aufrechte Achse zu schwenken, und einem Gehäuse
mit einer Zugangstür (50), die so montiert ist, dass sie vertikal von einer
Arbeitsposition zu einer offenen Position schwenkt, in der die Tür (50) in
der Bewegungsbahn der Deichsel (24) ist, wenn Letztere geschwenkt wird,
dadurch gekennzeichnet, dass die Deichsel (24) betriebsmäßig mit
der Tür (50) verbunden ist, um zu veranlassen, dass die Tür (50) als Reaktion
darauf, dass sich die Deichsel (24) zu der Tür (50) hin bewegt, in die Arbeitsposition
Mäher nach Anspruch 1, dadurch gekennzeichnet, dass die
Betriebsverbindung durch ein Türeingriffselement (60) hergestellt wird, das
an der Deichsel (24) an einer Stelle montiert ist, an der es die Tür (50) in
Eingriff nimmt, wenn die Tür (50) in der offenen Position ist.
Mäher nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass
das Türeingriffselement (60) speziell geformt ist, insbesondere wie ein dreieckiges
Element, so dass es veranlasst, dass die Tür (50) geschlossen wird, bevor sie
von der Deichsel (24) in Eingriff genommen wird, wenn die Deichsel (24) zur Zugangstür
(50) hin bewegt wird.
Mäher nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Betriebsverbindung durch ein Gestänge
(66) hergestellt wird, das zwischen der Deichsel (24) und der Zugangstür (50)
Mäher nach Anspruch 4, dadurch gekennzeichnet, dass das
Gestänge (66) eine Einweg-Verbindung aufweist, die Bewegung der Deichsel (24)
auf die Tür (50) überträgt, um ein Schließen der Tür (50)
nur dann zu bewirken, wenn die Deichsel (24) zu der Tür (50) hin bewegt wird.
Mäher nach Anspruch 1, dadurch gekennzeichnet, dass ein
Deichselstellglied (28) in der Form eines ersten hydraulischen Zylinders (28) zwischen
dem Trägerrahmen (12) und der Deichsel (24) verbunden ist, wobei ein zweites
hydraulisches Stellglied (82) an die Zugangstür (50) gekoppelt ist und in einem
hydraulischen Kreis (90) mit dem ersten hydraulischen Stellglied (28) gekoppelt
ist, so dass wenn der erste hydraulische Zylinder (28) betätigt wird, das zweite
hydraulische Stellglied (82) vor dem ersten hydraulischen Zylinder (28) betätigt
wird, um zu veranlassen, dass sich die Tür (50) vor der Schwingbewegung der
Deichsel (24) schließt.
Mower (10) including a carrier frame (12) being supported on ground
wheels (21), a tongue (24) having a region mounted to said carrier frame (12) for
pivoting about an upright axis, a housing including an access door (50) being mounted
for pivoting vertically from a working position to an open position wherein said
door (50) is in a path of movement of said tongue (24) when the latter is pivoted,
characterized in that said tongue (24) is operatively connected to said door
(50) so as to cause said door (50) to be moved to said working position in response
to said tongue (24) moving toward said door (50).
Mower according to claim 1, characterized in that said operative
connection is established by a door engaging member (60) mounted to said tongue
(24) in a location where it engages said door (50) when said door (50) is in said
Mower according to claim 1 or 2, characterized in that said door
engaging member (60) is specially shaped, in particular like a triangular member,
so that it causes said door (50) to be closed prior to being engaged by said tongue
(24) when said tongue (24) is moved toward said access door (50).
Mower according to one or more of the preceding claim, characterized
in that said operative connection is established by a linkage (66) coupled between
said tongue (24) and access door (50).
Mower according to claim 4, characterized in that said linkage
(66) includes a one-way connection which transfers motion of said tongue (24) to
said door (50) to effect closing of the door (50) only when said tongue (24) is
moved toward said door (50).
Mower according to claim 1, characterized in that a tongue actuator
(28) in the form of a first hydraulic cylinder (28) is connected between said carrier
frame (12) and said tongue (24); a second hydraulic actuator (82) being coupled
to said access door (50) and coupled in a hydraulic circuit (90) with said first
hydraulic actuator (28) such that when said first hydraulic cylinder (28) is actuated
said second hydraulic actuator (82) will sequence prior to said first hydraulic
cylinder (28) so as to cause said door (50) to close prior to swinging movement
of said tongue (24).
Faucheuse (10) comprenant un châssis porteur (12) qui est supporté
sur des roues (21), une languette (24) ayant une région montée sur ledit
châssis porteur (12) pour pivoter autour d'un axe vertical, un boîtier
comprenant une porte d'accès (50) qui est montée pour pivoter verticalement
d'une position de travail à une position ouverte, dans laquelle ladite porte
(50) est dans une trajectoire de mouvement de ladite languette (24) lorsque cette
dernière est pivotée, caractérisée en ce que ladite languette
(24) est raccordée de manière opérationnelle à ladite porte
(50) pour amener ladite porte (50) à être déplacée dans ladite
position de travail en réponse à ladite languette (24) qui se déplace
vers ladite porte (50).
Faucheuse selon la revendication 1, caractérisée en ce
que ledit raccordement opérationnel est établi par un élément
de mise en prise de porte (60) monté sur ladite languette (24) dans un emplacement
où il met en prise ladite porte (50) lorsque ladite porte (50) est dans ladite
Faucheuse selon la revendication 1 ou 2, caractérisée en
ce que ledit élément de mise en prise de porte (60) est formé
spécialement, en particulier comme un élément triangulaire, de sorte
qu'il amène ladite porte (50) à être fermée avant d'être
mise en prise par ladite languette (24) lorsque ladite languette (24) est déplacée
vers ladite porte d'accès (50).
Faucheuse selon une ou plusieurs des revendications précédentes,
caractérisée en ce que ledit raccordement opérationnel est
établi par une tringlerie (66) couplée entre ladite languette (24) et
la porte d'accès (50).
Faucheuse selon la revendication 4, caractérisée en ce
que ladite tringlerie (66) comprend un raccordement unidirectionnel qui transfère
le mouvement de ladite languette (24) à ladite porte (50) pour effectuer la
fermeture de la porte (50) uniquement lorsque ladite languette (24) est déplacée
vers ladite porte (50).
Faucheuse selon la revendication 1, caractérisée en ce
qu'un actionneur de languette (28) se présentant sous la forme d'un premier
vérin hydraulique (28) est raccordé entre ledit châssis porteur (12)
et ladite languette (24) ; un second actionneur hydraulique (82) qui est couplé
à ladite porte d'accès (50) et couplé dans un circuit hydraulique
(90) avec ledit premier actionneur hydraulique (28) de sorte que lorsque ledit premier
vérin hydraulique (28) est actionné, ledit second actionneur hydraulique
(82) réalise une séquence avant ledit premier vérin hydraulique (28)
afin d'amener ladite porte (50) à se fermer avant le mouvement oscillant de
ladite languette (24).
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