Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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The present invention relates to a moldboard plow,
and further relates to a plowing apparatus for which plow units
can be substituted with different sizecl units and laterally shiftedO
Conventionally9 each plow unit compriæes a vertical
beam secured to the frame~ and a moldboard secured to the beamO
The beam and moldboard secured thereto are bent to plow the soilO
Therefore, the beam and moldboard are liable to be further bent
by the soil pressure during the operationO In order to prevent
the deformation9 xeinforcement members and a landside are provided
on the back side of the beam and moldboardO AS a result~ the
space under the beam and moldboard is occupied by the reinforcement
members and landside. Therefore, the apparatus must be designed
to have a space between plow units to avoid the collision of plowed
soi~ with the reinforcemant members and landside of the adjacent
plow unitO To provide enough space on the turnin~ side of each
plow unit~ plow units have to be spaced in the longitudinal
direction, which extends the longitudinal length. Therefore~ the
center of gravity of the plow is moved backwards9 which causes
difficulty in driving ~he tractor, especially in changlng direction.
GenerallyJ the right s ide rear wheel of the tractor is
disposed to run on the previously plowed land and a front plow
unit takes a position to ~ollow after ~he right side rear wheel,
while no plow unit is in a position to follow the left 8ide rear
wheel. In this type of plowing app~ratus~ a strip of land at
the edge of the bordar levee or road remains unplowed J and must
be plowed by hand or left unplowedO
Accordingly~ it is an object of the present invention
to provide a moldboard plow which may avoid the above described
shortcomings. According to the present invention, a moldboard
plow comprises a frame having members to be connected to a
tractor, a rear frame member, engaging mPans mounted on said
rear frame member, and plow units secured to said engaging
means, each of said plow units comprising a beam secured to
said engaging means, a moldboard secured to said beam without
a reinforcing bracket, a share secured to said moldboard, said
beam being bent towards the adjacent plow unit in the leading
direction to provide a space beneath said bea~, means for secu-
ring said engaging means to the rear frame member, and a land-
side provided on the rearmost plow unit, the plow units being
so disposed as to turn plowed soil into the space beneath the
beam of the adjacent plow unit in the leading direction. The
engaging means are preferably adjustable laterally on the rear
frame member.
Other objects and advantages of the present invention -
will become apparent from the following description of embodi- -
ments with reference to the accompanying drawings in which:-
Fig. l is a perspective view of the whole plowing
20 apparatus in accordance with the present invention, --
Fig. 2 is a plan view thereof,
Fig. 3 is a side view thereof,
Fig. 4 is a perspective view showing another embodi-
ment of the present inventio~, and
Fig. 5 is a plan view showing a further embodiment
of the present invention.
A frame 10 of the plowing apparatus comprises a
front frame member ll provided with a pair of lower links Tl
and an upper link T2 to connect, at the ends thereof, the front
rame member ll with a tractor T, and provided with a rear
frame member 12 for slidably mounting the plow units thereon.
The rear rame member 12 which is disposed to make
an almost right angle with the longitudinal axis is connected
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with the front frame member 11 at both ends by side frame
members 13.
On the lower end of right side frame member 13, a ~:
pin 14 is protrudently provided to engage the right side lower
link Tl, and another pin 14a, which makes a pair with the pin
14, is provided on a bracket 14b at the middle portion of the
front frame member 11 to engage the left side lower link Tl.
A pair of struts 15 are provided on the upper surface of the
front frame member 11 to engage with the upper link T2.
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Further, a suitable number of plow unit~ 20 are
mounted on the rear frame member 12 by slidable engaging
members 30. Each plow uni~ comprise~, a bracket 31 welded to
the slidable engaging member 30, a beam 21 secured to the
bracket 31 by bolts 22, a moldboard 24 secured to the beam 21
w~thout any reinforcement memkers, a~ld a share 23 secured to
the moldboard 24 by bolts. In order to increa~e the strength
of the beam 21, the beam is bent in a u-shape in a ~ection at
the central portion 21a.
Each bracket 31 of the slidable engaging member 30 is
a diferent distance from each other to di~pose the plow units
with a longitudinal space between them so that turning of the
furrow slice may be carried out without the collision of adjacent
plGw units.
Eac~ engaging member 30 i~ able to be ~Lxed to the rear
frame member by set bolt 32 at a predetermined position. The
engaging members 30 are connected to each other by e~gaging the
bolts 32 with holes 32a o~ a connector 33 in order that khe pl~w
units may be sh~fted together~ It is poss~ble to change the
20 distance between the pl~w units by selecting the appropriate
holes 32a o~ the connector 33.
Different from the conventional plow which is provided
with landsides on every pl~w unit, only the rearmost left side
plow unit 20 is provided with a landside 25 o~ which the side
f~ce touches the end wall of the pl~wed soil preventing the
plowing apparatus from moving transversely. In tha conventional
plowing apparatus, reinforcement me~bers are provided on the
back side of the beam 21 and moldboard 24, and every pl~w unit
has a landside. Therefore, each plow unit must be set greatly apart
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:Erom each ol:her longitudi~nally so that the soil turned by the
preceding plow unit will not collide with the xeinforcement
me~bers and ~andside o:E any ~ollowing adjacent plow unit. As
a result, the who7e length of the plow apparatus becomes great.
On the other hand, in the present invention, since the reinforce-
me~t mem~ers and landside are not provided, except Oll the rearmost
plow unit, there is pr~vided a large space under the moldboard.
Therefore, soil: may be turned toward the adjacent moldboard
without colliding with the rein~orcement membe~ and landside
thereof. Thus, the whole length of the plowing apparatus may
be shortened.
To slide the engaging me~ber 30 along the rear frame 12,
a shi~ting device 40 comprising an oil pressure c:ylinder 41 and
a piston is provided~ One end of the oil pressure cylinder 41 is
connected to the s ide frame 13 and ~he rod 42 o~ the piston is
connected to the central slidable engaging member 30 ~hrough a
bracket 43. An oil pump mounted on the tractor T serves to supply
oil under pressure to both oil pressure chambers within the
cyl~nder 41 for driving the double-ac*ing cylinder.
Plowing woxk of the apparatus is hereinafter described.
In connecting the plow.ing apparatus to the tractor T,
the.lower links ~1 are engaged with pins 14 and 14a on the frame
10 and the upper link T2 with the struts 15. The frontmost p~w
unit 20a is set in a position to plcw along the inside of a line
extending from inside of the right side rear wheel R of the
tractor T. According to the position of the plow unit 20a, the
positions of the other pl~w units which are connected to `each
other by the connector 33 are inevitably determined, and the plow
units are fixed to the rear frame member 12 by set-bolts 32. In
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plowing, an unplowed part may remain after the left-xear wheel L
of the tractor, but no inconvenience will be caused except at the
edge of a border levee or road. In ordex to plow the edge of a
border levee, the plow units 20 are shi~ted and set with the
slidable engaging members 30 to be able to plow to the outside
of the left~rear wheel L of the tractor. In other words, after
removing the set bolts 32 and discom~ecting ea~h slidable
engaging member 30 from the rear frame member 12, oil is
supplied under pressure into the cylinder 41 of the o~fset
device 40 to push the piston rod 42 and to slid~ the slidable
engaging members 30 with the plow units 20 along the rear frame
membe~ 12. When the slidable engaging m~mbers 30 are located
at the desired position, supply of the oil pressure is stopped,
and the sli~able engaging members 30 are secured to the rear
frame me~ber 12 to plow the remaining strip of land at the edge
of the border levee. A variation of the above~descr~bed apparatus
in which the plow units 20 are moved together with the slidable
engaging members 30, is one in which each plow unit has an
independent slidable engaging member 30, the connector 33 being
om~tted, allowing the plow units ~o slide indi.vidually. In this
case the plow units are moved by hand.
In Fig. 4, another embodiment of the present invention
is ~hown with the same numbering for the same parts as are shown in
the previous embodiment. In this embodimen~, the slidable
engaging memhers 30 are removably attached to the rear frame
member 12. Therefore, the size of the plow units and the pitch
between the unîts may be varied ko provide for various plow
apparatus with different plowing capacity, in accordance with
need. In this illustrated e~bodiment, the front frame me~ber 11 -'
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and the rear frame member 12 are parallel to one another and
form a right angle with the longitudinal axis but thi~ arrange-
men~ can be chang~d to ~her suitablle disposi~ions and ~igures.
In the embodiment of Fig. 5, the rame mambers 11 and
12 are obliguely angled to extend rearwardly and an engaging
member 30a foxmed by a sleeve is slidably mounted on the ~rame
member 12. The beam 21 of each plow uni~ is directly secured
to the engaging member 30a wi~hout bracket 31 of the afore-
mentioned embodiment. To slide the engaging me~ber, manually
operated handle 45 is pivotably mounted on the pin 46. In
accordance wi~h the embodiment, an apparatus having a high
strength may be provided by removing the brac~et 31.
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