CA1304255C - Drawbar - Google Patents
DrawbarInfo
- Publication number
- CA1304255C CA1304255C CA000568210A CA568210A CA1304255C CA 1304255 C CA1304255 C CA 1304255C CA 000568210 A CA000568210 A CA 000568210A CA 568210 A CA568210 A CA 568210A CA 1304255 C CA1304255 C CA 1304255C
- Authority
- CA
- Canada
- Prior art keywords
- wing
- drawbar
- wing hitch
- hitch
- boom
- 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.)
- Expired - Lifetime
Links
- 239000002689 soil Substances 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims 2
- 238000000429 assembly Methods 0.000 claims 2
- 241001236644 Lavinia Species 0.000 abstract description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B59/00—Devices specially adapted for connection between animals or tractors and agricultural machines or implements
- A01B59/04—Devices specially adapted for connection between animals or tractors and agricultural machines or implements for machines pulled or pushed by a tractor
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B73/00—Means or arrangements to facilitate transportation of agricultural machines or implements, e.g. folding frames to reduce overall width
- A01B73/02—Folding frames
- A01B73/06—Folding frames foldable about a vertical axis
- A01B73/067—Folding frames foldable about a vertical axis to a position essentially rearward of the axis, in relation to the direction of travel
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Zoology (AREA)
- Agricultural Machines (AREA)
Abstract
ABSTRACT
In an agricultural drawbar, a novel foldable wing hitch assembly is employed such that when the agricultural drawbar is in a transport position, wing hitches and wing hitch support arms are folded inwardly in a scissor-like manner, thereby obtaining a very narrow transport width. Depending upon the end use of the drawbar, the wing hitch can be constructed from one piece, or in two sections with a pivotal connection. A lockable pin placed in the pivotal connection between the two wing hitch sections maintains them in direct alignment such that the drawbar can be backed up with the centre and wing sections of the main boom remaining extended transverse to the line of travel.
In an agricultural drawbar, a novel foldable wing hitch assembly is employed such that when the agricultural drawbar is in a transport position, wing hitches and wing hitch support arms are folded inwardly in a scissor-like manner, thereby obtaining a very narrow transport width. Depending upon the end use of the drawbar, the wing hitch can be constructed from one piece, or in two sections with a pivotal connection. A lockable pin placed in the pivotal connection between the two wing hitch sections maintains them in direct alignment such that the drawbar can be backed up with the centre and wing sections of the main boom remaining extended transverse to the line of travel.
Description
~3~4~
This invention relates to agricultural drawbars and particularly rearwardly folding agricultural drawbars~
As farming has become less labour intensive, agricultural implements have been designed to cover a wider swath.
In addi-tion, two or three opera-tions are accomplished with one passage over the land. More specifically, agricultural drawbars have become wider and wider to accomplish this end. Because of the excessive width, it has become necessary to fold such drawbars in order that the implement ma~ be pulled through gates or along roadways when it is not being operated in the field position.
Generally, the drawbar is construc-ted such that it has two or more and preferably three boom sections. Sections of the drawbar are connected to each other by 2-way pivotal connections. Drawbars of this general class are folded either forwardly, vertically or rearwardly. In the drawbar of the present invention, there are two wing boom sections and one centre boom section. When the drawbar is required to go into the transport position, the two wing boom sections are folded rearwardly and are aliyned with the direction of travel of the machine.
When the drawbar is required to be in the operating or field position, the wing booms and the centre boom are generally aliyned and are transverse to the direction of travel. In order to hold the wing sections of the main boom transverse to the direction of travel, some sort of boom draw is connected forwardly to a cart and rearwardly to the wing sections. This has been accomplished in the past by cables or some other arm device which r~
~3~Z5~
is taut when the drawbar is in the operating position moving forwardly.
One of the problems with the flexible cable boom draw device is that -the machine cannot be backed up when the wings are in the aligned extended position because the wings will fold forwardly. This is a disadvantage when the operator is working the land and finds himself in an awkward position and must back up the drawbar in order to escape from such position. It is also advantageous to be able to leave the the attachments on the ground and move the drawbar to another location.
It is an object of the present invention to be able to back up the drawbar when the boom sections are in the field extended position without having the wing boom sections move from their substantially aligned position with the centre boom.
It is a second object of this invention to quickly attach and detach agricultural implements in the field.
It is a third object of this invention to provide a drawbar which can be converted to or be used as a field sprayer with rigid boom draws.
It is a fourth object of this invention to provide a drawbar with minimal transport width when in the transport position.
This is accomplished by usiny a single solid one piece boom draw or a two piece boom draw which can be made rigid by inserting a pin between its two sections. When the drawbar is moved into the transport position or is being pulled forwardly in the operating position in the field, the pin is removed so that 2~i5i the boom draw can flex, particularly when turning corners. In another embodimen~ of the inven-tion, an end of the boom draw or wing hitch sections is pivotally connected to two pivotally connected support arms. When the drawbar i 5 in tlle transport position, these folding support arms permit the drawbar to occupy a much narrower overall width than if a slngle support arm is used.
Therefore, this invention seeks to provide a wing hitch assembly for use with a rearwardly foldable agricultu.ral drawbar 0 comprising:
a first wing hitch support arm, a second wing hitch support arm, a first wing hitch sec-tion, a second wing hitch section, and a connecting means wherein said first and second wing hitch sections are pivotally connected and free to pivot inwardly towards the cart or trailer when said drawbar is in an operating position or a transport position; and wherein said wing hitch sections are optionally lockable and unable to pivot when said drawbar is in a field position.
The invention also seeks to provide a wing hitch assembly for use with a rearwardly foldable agricultural drawbar comprising:
a first wing hitch support arm a second wing hitch support arm ~3~2~i$
a rigid wing hi-tch section, and a connecting means wherein when in a transport position said wing hitch assemb:Ly folds inward:Ly thereby occupying a minimum transport ~idth, and when in an operating or field position said rigid wing hitch section maintains a main boom substantially perpendicular to a line of travel reyardless of whether said line of travel is forwardly or rearwardly.
A further advantage of the present invention is -that a frame supporting and towing implements such as harrows, or harrows and packers can easily be detached from drawbar by removing a plurality of pins from the clrawbar frame. The farmer may then take the drawbar to another location or use ~he drawbar for another use such as a field sprayer. When used as a field sprayer said first and second wing hitch sections are locked.
When the farmer again wishes to use the detachable implements that have been left in the field, he merely brings the drawbar ahead of the implements, folds the drawbar outwards, and inserts the pins in the wing hitch sections of each boom draw thereby making them rigid. Thereafter he can back up the drawbar into the desired position where pins may be reinserted and again the drawbar is ready to work the field with the harrrows or harrows and packers.
The invention also provides a rearwardly foldable agricultural drawbar, having a plurality of detachable soil working implements, wherein when said drawbar is in a first working position at a point of origin, a plurality of pins are ~3~
removed and said drawbar is pulled forwardly leaving said implements on the ground, said drawbar being free to move elsewhere without said implemen-ts; and wherein when said drawbar is in a field position, pins are i.nserted in pivotal connections between first wing hitch sections and second wing hi-tch sections, and said drawbar is pushed rearwardly to said point of origin in said first working position; said soil working implements are raised and placed in cradles and thereafter said plurality of pins are reinserted thereby reattaching said soil working implements, and wherein said pins in said pivotal connections are removed, and said drawbar may thereafter be pulled Eorwardly in an operating position.
The invention .is clescribed in more detail in connection with the fo.Llowiny drawings wherein:
Figure 1 is a top view of the basic components of the drawbar, and the wing boom sections centre boom section are aligned in the extended position;
Figure 2 is a perspective view of the drawbar showing a number o~ the detachable implements;
~0 Figure 3 is a partial top view of the wing hitch sections and support arms, and one of the wing boom sections in the extended position;
Figure 4 is a partial top view showing one wing boom section and wing hitch sections and support arms in a position between the transport position and the field extended position;
Figure 5 is a partial top view of the same side of the drawbar in the transport position.
~3~S~ 72061-1~
Figure 5A shows the wing hitch assembly movement when the drawbar and cart are in a left hand turn;
Figure 5B shows the wing hitch assembly movement when the drawbar and cart are in a right hand turn;
Figure 6 is a close up view of pivot point 18.
Figure 7 is a close up view of 2-way pivotal connections.
Figure 8 shows movement and procedure to easily reattach packer to drawbar.
In Figure 1, a cart or trailer 1 having a hitch point 3 which is adapted to be pulled by a trac-tor ~not shown~. The cart is supported by wheels 2. At the rear of the cart is a centre boom section 4. On each side of the centre boom portion and aligned therewith are wing boom sections 5. The riyht and left wing boom sections are connected to the centre section by 2-way pivotal connections 24. Main frame members 6 extend rearwardly from the centre boom and wing boom sections. The wing boom sections are supported by wheels 7 which have hydraulic cylinder 8 attached to the boom. On the front portion of each wing boom is a connecting member 9 which is pivotally mounted on wing boom 5 at pivot 20. The other end of the connecting member 9 is pivotally mounted at 19 to a rear winy hitch section 10. Wing hitch section 10 is pivotally mounted at 18 to front wing hitch section 11.
Pivot 18 pivots inwardly only. Alternatively, it can be constructed to pivot outwardly only. A pin 17 can be inserted in pivot 18 to lock wing hitch sections 10 and 11 in approximate direct alignment. Front winy hitch section 11 is pivotally connected at 16 to second winy hitch support arm 12. The second ~3~
wing hitch support arm 12 is pivotally connected at 15 to a first wing hitch support arm 13 which in turn is pivotally connected to the cart rame 1 at 14. Spring 22 extends from the first wing hitch support arm 13 to a CLOS5 member of the eart 1. It should be noted that with one boom draw rather than two wing hitch sections sp.ring 22 is not neeessary. A second spring 21 connects the first and second wing hitch support arms 13 and 12. Pivot point 16 is adapted to latchably loek the front wing hiteh section to the cart frame at eradle 23.
Figure 2 is a perspec-tive view of the agricultural drawbar in the operating position. ~ydraulic cylinders 25 are attached to levers 26 and are eapable of rotating eentre boom seetion 4 and indirectly winy boom sections 5 from an operating to a field position and visa versa. When centre boom section 4 and wing boom seetion 5 are rotated, frames members 6 move from a substantially horizontal position to a substantially vertieal position, thereby lifting frame members 28 with harrows 29 and packers 30 off the ground. In Figure 2, the maehine is in A
position to be pulled forwardly and to work the ground with harrows 29 and paekers 30. If pins 17 are inserted in pivotal joints 18 keeping wing hitches 10 and 11 in rigid alignment, and the main boom consisting of eentre seetion 4 and wing sections 5 is rotated upwardly by hydraulic cylinders 25, sueh that frames 28 and implements 29 and 30 are lifted off the ground, the drawbar may be moved rearwardly while the centre boom and wing booms maintain direct alignment transverse to the direction of travel.
In operation, in the field position, wing boom sections 5 are in direct alignment with centre boom 4 as shown in Figure 3.
Pivot point 16 i5 latchably locked to cradle 23. Wheel 7 is in the operating position direction. If the drawbar is moved forwardly, pivot point 18 is free to pivot ln one direction, for example when the tractor and drawbar turn to the left.
When the operator wants to place the d.rawbar in -the folded transport position, wheel 7 is turned approximately 90 so that it is substantially parallel with wing boom 5. I'hereafter, as shown in Figure 4 r latch cradle 23 releases pivot point 16 and the operator moves the vehicle in a forward direction such that wing boom section 5 gradually trails further behind until it is substantially parallel with the direction of travel of the cart.
Figure 4 shows wing hitch support arms 12 and 13 rotate around point 14. Tension is placed on both sprinys 22 and 21. Again spring 22 is not necessary with one wing hitch section.
In Figure 5, wing boom section 5 is substantially perpendicular to centre boom 4. First wing hitch support arm 13 has pivoted about pivot 14. If support arm 13 has reached a limiting stop, second wing hitch support arm 12 will pivot about first wing hitch support arm at pivot point 15. Wing hitch sections 10 and 11 have pivoted about pivot point 16 and connecting arm 9 has pivoted about pivot point 19. Spring 21 urges second wing hitch support arm 12 inwardly as does spring 22 urge first wing hitch support arm 13 inwardly. This allows for a narrow transport width. During transport, pivot 18 is free to pivot inwardly if the tractor and cart make a sharp turn to -the left; or members 12 and 13 will pivot about 1~, whatever has leas-t resistance. Member 12 will rotate outwardly about 15 if the cart makes a sharp turn -to the right. Figures 5a and 5b illustrate 2~
this movemen-t when the tractor and cart make sharp turns.
Wheels 7 are steered by cylinder 8 in order -to keep alignment in the transport position and allow faster mo~ement into the field position. When the operator wishes to put the drawbar in the e~tended field position, he simply backs the tractor and cart rearwardly and wheel 7 tends to push the wing boom section 5 outwardly to the position shown in Figure ~. When pivot point 1 abuts latch cradle 23, it is securely locked in place and the driver turns the wheel 7 so that it is parallel to the line of travel in the field position.
If the operator wan-ts to move the drawbar to another location without the implements, pins 27 are removed from frames 6, and frames 28, harrows 29 and packers 30 which are attached to frames 31 and 32 are left in their position on the field. The driver may then take the drawbar in its extended position to another area of the field. When the operator wishes to reaktach the implements, pins 17 are placed into pivot joints 18 keeping wing hitch sections 10 and 11 aligned and the operator urges the cart and boom rearwardly to the point of origin where frames 31 and 32 are placed back into cradles on frame 6, then the pins are reattached and the drawbar is again ready to work in the operating position.
A further option to this invention is the ability to detach only packers 30 from frames 31 and 32. To easily reattach packers the drawbar is moved rearwardly beyond a point of origin, packers 30 are placed on top of Erames 31 and 32, the drawbar is moved forwardly and packers 30 are guided into cradles on frames 31 and 32. Pins 33 secures packers 30 in cradles.
_ g _
This invention relates to agricultural drawbars and particularly rearwardly folding agricultural drawbars~
As farming has become less labour intensive, agricultural implements have been designed to cover a wider swath.
In addi-tion, two or three opera-tions are accomplished with one passage over the land. More specifically, agricultural drawbars have become wider and wider to accomplish this end. Because of the excessive width, it has become necessary to fold such drawbars in order that the implement ma~ be pulled through gates or along roadways when it is not being operated in the field position.
Generally, the drawbar is construc-ted such that it has two or more and preferably three boom sections. Sections of the drawbar are connected to each other by 2-way pivotal connections. Drawbars of this general class are folded either forwardly, vertically or rearwardly. In the drawbar of the present invention, there are two wing boom sections and one centre boom section. When the drawbar is required to go into the transport position, the two wing boom sections are folded rearwardly and are aliyned with the direction of travel of the machine.
When the drawbar is required to be in the operating or field position, the wing booms and the centre boom are generally aliyned and are transverse to the direction of travel. In order to hold the wing sections of the main boom transverse to the direction of travel, some sort of boom draw is connected forwardly to a cart and rearwardly to the wing sections. This has been accomplished in the past by cables or some other arm device which r~
~3~Z5~
is taut when the drawbar is in the operating position moving forwardly.
One of the problems with the flexible cable boom draw device is that -the machine cannot be backed up when the wings are in the aligned extended position because the wings will fold forwardly. This is a disadvantage when the operator is working the land and finds himself in an awkward position and must back up the drawbar in order to escape from such position. It is also advantageous to be able to leave the the attachments on the ground and move the drawbar to another location.
It is an object of the present invention to be able to back up the drawbar when the boom sections are in the field extended position without having the wing boom sections move from their substantially aligned position with the centre boom.
It is a second object of this invention to quickly attach and detach agricultural implements in the field.
It is a third object of this invention to provide a drawbar which can be converted to or be used as a field sprayer with rigid boom draws.
It is a fourth object of this invention to provide a drawbar with minimal transport width when in the transport position.
This is accomplished by usiny a single solid one piece boom draw or a two piece boom draw which can be made rigid by inserting a pin between its two sections. When the drawbar is moved into the transport position or is being pulled forwardly in the operating position in the field, the pin is removed so that 2~i5i the boom draw can flex, particularly when turning corners. In another embodimen~ of the inven-tion, an end of the boom draw or wing hitch sections is pivotally connected to two pivotally connected support arms. When the drawbar i 5 in tlle transport position, these folding support arms permit the drawbar to occupy a much narrower overall width than if a slngle support arm is used.
Therefore, this invention seeks to provide a wing hitch assembly for use with a rearwardly foldable agricultu.ral drawbar 0 comprising:
a first wing hitch support arm, a second wing hitch support arm, a first wing hitch sec-tion, a second wing hitch section, and a connecting means wherein said first and second wing hitch sections are pivotally connected and free to pivot inwardly towards the cart or trailer when said drawbar is in an operating position or a transport position; and wherein said wing hitch sections are optionally lockable and unable to pivot when said drawbar is in a field position.
The invention also seeks to provide a wing hitch assembly for use with a rearwardly foldable agricultural drawbar comprising:
a first wing hitch support arm a second wing hitch support arm ~3~2~i$
a rigid wing hi-tch section, and a connecting means wherein when in a transport position said wing hitch assemb:Ly folds inward:Ly thereby occupying a minimum transport ~idth, and when in an operating or field position said rigid wing hitch section maintains a main boom substantially perpendicular to a line of travel reyardless of whether said line of travel is forwardly or rearwardly.
A further advantage of the present invention is -that a frame supporting and towing implements such as harrows, or harrows and packers can easily be detached from drawbar by removing a plurality of pins from the clrawbar frame. The farmer may then take the drawbar to another location or use ~he drawbar for another use such as a field sprayer. When used as a field sprayer said first and second wing hitch sections are locked.
When the farmer again wishes to use the detachable implements that have been left in the field, he merely brings the drawbar ahead of the implements, folds the drawbar outwards, and inserts the pins in the wing hitch sections of each boom draw thereby making them rigid. Thereafter he can back up the drawbar into the desired position where pins may be reinserted and again the drawbar is ready to work the field with the harrrows or harrows and packers.
The invention also provides a rearwardly foldable agricultural drawbar, having a plurality of detachable soil working implements, wherein when said drawbar is in a first working position at a point of origin, a plurality of pins are ~3~
removed and said drawbar is pulled forwardly leaving said implements on the ground, said drawbar being free to move elsewhere without said implemen-ts; and wherein when said drawbar is in a field position, pins are i.nserted in pivotal connections between first wing hitch sections and second wing hi-tch sections, and said drawbar is pushed rearwardly to said point of origin in said first working position; said soil working implements are raised and placed in cradles and thereafter said plurality of pins are reinserted thereby reattaching said soil working implements, and wherein said pins in said pivotal connections are removed, and said drawbar may thereafter be pulled Eorwardly in an operating position.
The invention .is clescribed in more detail in connection with the fo.Llowiny drawings wherein:
Figure 1 is a top view of the basic components of the drawbar, and the wing boom sections centre boom section are aligned in the extended position;
Figure 2 is a perspective view of the drawbar showing a number o~ the detachable implements;
~0 Figure 3 is a partial top view of the wing hitch sections and support arms, and one of the wing boom sections in the extended position;
Figure 4 is a partial top view showing one wing boom section and wing hitch sections and support arms in a position between the transport position and the field extended position;
Figure 5 is a partial top view of the same side of the drawbar in the transport position.
~3~S~ 72061-1~
Figure 5A shows the wing hitch assembly movement when the drawbar and cart are in a left hand turn;
Figure 5B shows the wing hitch assembly movement when the drawbar and cart are in a right hand turn;
Figure 6 is a close up view of pivot point 18.
Figure 7 is a close up view of 2-way pivotal connections.
Figure 8 shows movement and procedure to easily reattach packer to drawbar.
In Figure 1, a cart or trailer 1 having a hitch point 3 which is adapted to be pulled by a trac-tor ~not shown~. The cart is supported by wheels 2. At the rear of the cart is a centre boom section 4. On each side of the centre boom portion and aligned therewith are wing boom sections 5. The riyht and left wing boom sections are connected to the centre section by 2-way pivotal connections 24. Main frame members 6 extend rearwardly from the centre boom and wing boom sections. The wing boom sections are supported by wheels 7 which have hydraulic cylinder 8 attached to the boom. On the front portion of each wing boom is a connecting member 9 which is pivotally mounted on wing boom 5 at pivot 20. The other end of the connecting member 9 is pivotally mounted at 19 to a rear winy hitch section 10. Wing hitch section 10 is pivotally mounted at 18 to front wing hitch section 11.
Pivot 18 pivots inwardly only. Alternatively, it can be constructed to pivot outwardly only. A pin 17 can be inserted in pivot 18 to lock wing hitch sections 10 and 11 in approximate direct alignment. Front winy hitch section 11 is pivotally connected at 16 to second winy hitch support arm 12. The second ~3~
wing hitch support arm 12 is pivotally connected at 15 to a first wing hitch support arm 13 which in turn is pivotally connected to the cart rame 1 at 14. Spring 22 extends from the first wing hitch support arm 13 to a CLOS5 member of the eart 1. It should be noted that with one boom draw rather than two wing hitch sections sp.ring 22 is not neeessary. A second spring 21 connects the first and second wing hitch support arms 13 and 12. Pivot point 16 is adapted to latchably loek the front wing hiteh section to the cart frame at eradle 23.
Figure 2 is a perspec-tive view of the agricultural drawbar in the operating position. ~ydraulic cylinders 25 are attached to levers 26 and are eapable of rotating eentre boom seetion 4 and indirectly winy boom sections 5 from an operating to a field position and visa versa. When centre boom section 4 and wing boom seetion 5 are rotated, frames members 6 move from a substantially horizontal position to a substantially vertieal position, thereby lifting frame members 28 with harrows 29 and packers 30 off the ground. In Figure 2, the maehine is in A
position to be pulled forwardly and to work the ground with harrows 29 and paekers 30. If pins 17 are inserted in pivotal joints 18 keeping wing hitches 10 and 11 in rigid alignment, and the main boom consisting of eentre seetion 4 and wing sections 5 is rotated upwardly by hydraulic cylinders 25, sueh that frames 28 and implements 29 and 30 are lifted off the ground, the drawbar may be moved rearwardly while the centre boom and wing booms maintain direct alignment transverse to the direction of travel.
In operation, in the field position, wing boom sections 5 are in direct alignment with centre boom 4 as shown in Figure 3.
Pivot point 16 i5 latchably locked to cradle 23. Wheel 7 is in the operating position direction. If the drawbar is moved forwardly, pivot point 18 is free to pivot ln one direction, for example when the tractor and drawbar turn to the left.
When the operator wants to place the d.rawbar in -the folded transport position, wheel 7 is turned approximately 90 so that it is substantially parallel with wing boom 5. I'hereafter, as shown in Figure 4 r latch cradle 23 releases pivot point 16 and the operator moves the vehicle in a forward direction such that wing boom section 5 gradually trails further behind until it is substantially parallel with the direction of travel of the cart.
Figure 4 shows wing hitch support arms 12 and 13 rotate around point 14. Tension is placed on both sprinys 22 and 21. Again spring 22 is not necessary with one wing hitch section.
In Figure 5, wing boom section 5 is substantially perpendicular to centre boom 4. First wing hitch support arm 13 has pivoted about pivot 14. If support arm 13 has reached a limiting stop, second wing hitch support arm 12 will pivot about first wing hitch support arm at pivot point 15. Wing hitch sections 10 and 11 have pivoted about pivot point 16 and connecting arm 9 has pivoted about pivot point 19. Spring 21 urges second wing hitch support arm 12 inwardly as does spring 22 urge first wing hitch support arm 13 inwardly. This allows for a narrow transport width. During transport, pivot 18 is free to pivot inwardly if the tractor and cart make a sharp turn to -the left; or members 12 and 13 will pivot about 1~, whatever has leas-t resistance. Member 12 will rotate outwardly about 15 if the cart makes a sharp turn -to the right. Figures 5a and 5b illustrate 2~
this movemen-t when the tractor and cart make sharp turns.
Wheels 7 are steered by cylinder 8 in order -to keep alignment in the transport position and allow faster mo~ement into the field position. When the operator wishes to put the drawbar in the e~tended field position, he simply backs the tractor and cart rearwardly and wheel 7 tends to push the wing boom section 5 outwardly to the position shown in Figure ~. When pivot point 1 abuts latch cradle 23, it is securely locked in place and the driver turns the wheel 7 so that it is parallel to the line of travel in the field position.
If the operator wan-ts to move the drawbar to another location without the implements, pins 27 are removed from frames 6, and frames 28, harrows 29 and packers 30 which are attached to frames 31 and 32 are left in their position on the field. The driver may then take the drawbar in its extended position to another area of the field. When the operator wishes to reaktach the implements, pins 17 are placed into pivot joints 18 keeping wing hitch sections 10 and 11 aligned and the operator urges the cart and boom rearwardly to the point of origin where frames 31 and 32 are placed back into cradles on frame 6, then the pins are reattached and the drawbar is again ready to work in the operating position.
A further option to this invention is the ability to detach only packers 30 from frames 31 and 32. To easily reattach packers the drawbar is moved rearwardly beyond a point of origin, packers 30 are placed on top of Erames 31 and 32, the drawbar is moved forwardly and packers 30 are guided into cradles on frames 31 and 32. Pins 33 secures packers 30 in cradles.
_ g _
Claims (15)
1. A wing hitch assembly for use with a rearwardly foldable agricultural drawbar comprising:
a first wing hitch support arm, a second wing hitch support arm, a first wing hitch section, a second wing hitch section, and a connecting means wherein said first and second wing hitch sections are pivotally connected and free to pivot inwardly, towards the cart or trailer or in the alternative outwardly away from the cart or trailer, when said drawbar is in an operating position or a transport position; and wherein said wing hitch sections are optionally lockable and unable to pivot when said drawbar is in a field position.
a first wing hitch support arm, a second wing hitch support arm, a first wing hitch section, a second wing hitch section, and a connecting means wherein said first and second wing hitch sections are pivotally connected and free to pivot inwardly, towards the cart or trailer or in the alternative outwardly away from the cart or trailer, when said drawbar is in an operating position or a transport position; and wherein said wing hitch sections are optionally lockable and unable to pivot when said drawbar is in a field position.
2. The invention also seeks to provide a wing hitch assembly for use with a rearwardly foldable agricultural drawbar comprising:
a first wing hitch support arm, a second wing hitch support arm, a rigid wing hitch section, and a connecting means wherein when in a transport position said wing hitch assembly folds inwardly towards the cart or trailer thereby occupying a minimum transport width, and when in an operating or field position said rigid winy hitch section maintains a main boom substantially perpendicular to a line of travel regardless of whether said line of travel is forwardly or rearwardly.
a first wing hitch support arm, a second wing hitch support arm, a rigid wing hitch section, and a connecting means wherein when in a transport position said wing hitch assembly folds inwardly towards the cart or trailer thereby occupying a minimum transport width, and when in an operating or field position said rigid winy hitch section maintains a main boom substantially perpendicular to a line of travel regardless of whether said line of travel is forwardly or rearwardly.
3. A wing hitch assembly as claimed in claim 1 ox 2 wherein said firs-t and second wing hitch support arms are pivotally connected to one another such that said arms are pivotally urged inwardly in the transport position thereby permitting said drawbar to occupy minimum width.
4. A wing hitch assembly as claimed in claims 1 or 2 wherein said first and second wing hitch support arms are equipped with a spring therebetween.
5. A wing hitch assembly as claimed in claim 1 wherein said wing hitch sections are lockable with a pin.
6. A wing hitch assembly as claimed in claim 1 wherein said first wing hitch support arm is pivotally connected to a cart frame; and said second wing hitch support arm is pivotally connected to said first wing hitch section; and said connecting means pivotally connects said second wing hitch section to a wing boom.
7. A wing hitch assembly as claimed in claim 2 wherein said first wing hitch support arm is pivotally connected to a cart frame, said second wing hitch support arm is pivotally connected to said rigid wing hitch section; and said connecting means pivotally connects said rigid wing hitch section to a wing boom.
8. A wing hitch assembly as claimed in claim 6 or 7 wherein a spring extends from said cart frame to said first wing hitch support arm.
9. A wing hitch assembly as claimed in claim 6 wherein said pivotal connection between said second wing hitch support arm and said first wing hitch section is adapted to be fixedly secured to said cart frame by a locking means, when said drawbar is in the field or working position.
10. A wing bitch assembly as claimed in claim 7 wherein said pivotal connection between said second wing hitch support arm and said rigid wing hitch section is adapted to be fixedly secured to said cart frame by a locking means when said drawbar is in the field or working position.
11. A rearwardly foldable agricultural drawbar which comprises a centre boom section, two wing boom sections and two wing hitch assemblies as claimed in claim 9.
12. A rearwardly foldable agricultural drawbar which comprises a center boom section, two wing boom sections, and two wing hitch assemblies as claimed in claim 10.
13. A rearwardly foldable agricultural drawbar as claimed in claim 11 wherein when said drawbar is in the field position, said centre boom section and said wing boom sections are substantially transverse to the line of travel by means of lockable pins, regardless of whether the drawbar is travelling in a forward or rearward direction.
14. A rearwardly foldable agricultural drawbar, as claimed in claim 13, having a plurality of detachable soil working implements; wherein in operation, when said drawbar is in a first working position at a point of origin, a plurality of pins may be removed and said drawbar can be pulled forwardly allowing said implements to be left on the ground, said drawbar being free to move elsewhere without said implements; and wherein when said drawbar is in a field position, pins are inserted in pivotal connections between first wing hitch sections and second wing hitch sections, and said drawbar is pushed rearwardly to said point of origin in said first working position; and thereafter said soil working implements are raised and placed on frames; said plurality of pins are reinserted thereby reattaching said soil working implements; and wherein when said pins in said pivotal connections are removed said drawbar can be pulled forwardly in an operating position.
15. A rearwardly foldable agricultural drawbar as claimed in claim 13, having a plurality of detachable implements which can be left in a field position when not in use; said implements being constructed such that when it is desired to employ said implements, the drawbar is moved rearwardly beyond a point of origin and then moved forwardly such that said implements are automatically reattached by means of a hitch and cradle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000568210A CA1304255C (en) | 1988-05-31 | 1988-05-31 | Drawbar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000568210A CA1304255C (en) | 1988-05-31 | 1988-05-31 | Drawbar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1304255C true CA1304255C (en) | 1992-06-30 |
Family
ID=4138111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000568210A Expired - Lifetime CA1304255C (en) | 1988-05-31 | 1988-05-31 | Drawbar |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1304255C (en) |
-
1988
- 1988-05-31 CA CA000568210A patent/CA1304255C/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4821809A (en) | Multiple section drawbar | |
| CA1071918A (en) | Forwardly foldable toolbar | |
| CA1281229C (en) | Implement transport hitch | |
| US5251704A (en) | Detachable harrow sprayer | |
| US4117893A (en) | Agricultural tool bar | |
| US8127861B2 (en) | Front folding agricultural implement frame with rearwardly telescoping tongue | |
| US4319643A (en) | Front folding agricultural tool bar with movable carriage to which wings coupled | |
| US4360215A (en) | Drill hitch transport | |
| US4346909A (en) | Transport mechanism for single and multiple unit pull type implements | |
| US5715893A (en) | Implement convertible between a use position and a transport position | |
| US4213628A (en) | Pulling hitch for agricultural implements | |
| CA1306448C (en) | Auto-fold sprayer | |
| US3640345A (en) | Foldable harrow cart | |
| US4632417A (en) | Bi-fold hinge for a folding toolbar | |
| US4662161A (en) | Pull-type windrower | |
| AU720971B2 (en) | Steerable implement hitch | |
| CA1049831A (en) | Latch arrangement for multiple section earth working implement | |
| US4056149A (en) | Rearwardly folding implement | |
| US4821811A (en) | Mobile support frame | |
| US3841504A (en) | Bale loader | |
| US4308920A (en) | Ground working implement wherein forward frame portion raised before frame support engages ground | |
| US4327932A (en) | Overlapped folding beam implement | |
| CA1126565A (en) | Rear folding agricultural implement | |
| US5129463A (en) | Conservation tillage implement convertible for end transport | |
| CA1304255C (en) | Drawbar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |