CA1085215A

CA1085215A - Moldboard plow

Info

Publication number: CA1085215A
Application number: CA292,059A
Authority: CA
Inventors: Syoko Sugano
Original assignee: SUGANO Corp
Current assignee: SUGANO Corp
Priority date: 1976-11-30
Filing date: 1977-11-30
Publication date: 1980-09-09
Also published as: FR2371863A1

Abstract

ABSTRACT OF THE DISCLOSURE
A moldboard plow comprising a frame to be connected to the tractor and plow units secured to the frame. Each plow unit comprises a beam and a moldboard secured thereto without reinforcement members and only one landside is provided, on the rearmost plow unit. Since each of the plow units is not provided with reinforcement members or a landside to be obstacles to the plowed soil, the longitudinal space between adjacent plow units may be decreased to shorten the overall longitudinal length. In addition, plow units are slidably or detachably provided on the frame so as to be shifted along the frame, whereby it is possible to plow the whole surface of the field without leaving an unplowed strip.

Description

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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 i2~5 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 -' _ 5 _ ;%~5 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.

Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:

1. A moldboard plow comprising a frame having mem-bers to be connected to a tractor, a rear frame member, enga-ging means 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 beam, means for securing said engaging means to the rear frame member, and a landside 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.

2. A moldboard plow in accordance with Claim 1, in which said engaging means mounted on the rear frame member is slidable on the rear frame member.

3. A moldboard plow in accordance with Claim 1, in which a separate engaging member is provided for each plow unit and each engaging member is slidable on the rear frame member and linked by a connector to the engaging members of the other plow units.

4. A moldboard plow in accordance with Claim 1, in which said engaging means is detachably secured to the rear frame member.

5. A moldboard plow in accordance with Claim 1, wherein the plow unit beams are detachably secured to the engaging means.

6. A moldboard plow comprising a frame having mem-bers to be connected to a tractor, a rear frame member, enga-ging means slidably mounted on said rear frame member, plow units secured to said engaging means, each of said plow units comprising a beam secured to said engaging member, a moldboard secured to said beam without any reinforcement bracket, and 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 beam, means for securing said engaging means to the rear frame member, a landside provided on the rearmost plow unit, and power means for shifting said engaging means along said rear frame member, 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.