U.S. patent application number 13/401825 was filed with the patent office on 2013-02-28 for agricultural implements with hinged and floating wings.
The applicant listed for this patent is Norman George Reichardt, Christopher Lee Tamm. Invention is credited to Norman George Reichardt, Christopher Lee Tamm.
Application Number | 20130048322 13/401825 |
Document ID | / |
Family ID | 43061686 |
Filed Date | 2013-02-28 |
United States Patent
Application |
20130048322 |
Kind Code |
A1 |
Tamm; Christopher Lee ; et
al. |
February 28, 2013 |
AGRICULTURAL IMPLEMENTS WITH HINGED AND FLOATING WINGS
Abstract
A towable soil pulverizer having a longitudinal center section,
and foldable wings mounted by hinges on opposite sides of the
center section to fold about substantially longitudinal hinge axes.
The wings and center section have ground working rollers. Each
hinge has a spaced ball joint and guide roller in roller slot. A
wing float axis for each wing extends substantially perpendicular
to the longitudinal hinge axis in a transverse direction, each wing
also being pivotal about the float axis. The hinge design with the
float axis prevents weight transfer between the center section and
wing sections when the pulverizer operates over uneven soil, to
provide uniform soil conditioning over the width of the pulverizer.
The center section rollers are positioned ahead of (or behind or
co-linear with) the wing rollers. Components of the ball joint and
roller guide in slot are fixedly and non-rotationally attached to
the center section.
Inventors: |
Tamm; Christopher Lee;
(Brillion, WI) ; Reichardt; Norman George;
(Reedsville, WI) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Tamm; Christopher Lee
Reichardt; Norman George |
Brillion
Reedsville |
WI
WI |
US
US |
|
|
Family ID: |
43061686 |
Appl. No.: |
13/401825 |
Filed: |
February 21, 2012 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
12387935 |
May 8, 2009 |
8118110 |
|
|
13401825 |
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Current U.S.
Class: |
172/459 |
Current CPC
Class: |
A01B 73/044 20130101;
A01B 29/041 20130101 |
Class at
Publication: |
172/459 |
International
Class: |
A01B 63/00 20060101
A01B063/00 |
Claims
1. A towable agricultural implement for working the soil,
comprising in combination a longitudinally extending center section
and foldable wings mounted on opposite sides of the center section;
the foldable wings being hinged at their inner ends to opposite
sides of the center section and pivotable about a longitudinal
hinge axis to fold upwardly over the center section for transport
or to unfold downwardly from the folded position for field
operation; the center section and wings having ground-working
elements such as rollers for working the soil; each wing being
connected to the center section by a hinge having a spaced ball
joint and guide roller in roller slot; the ball joint having one of
a ball and socket attached to the center section, and the other of
the ball and socket attached to the wing; the guide roller in
roller slot having one of the guide roller and roller slot attached
to the center section, and the other of the guide roller and roller
slot attached to the wing; a wing float axis passing through the
ball joint and extending perpendicular to the longitudinal hinge
axis in a transverse direction, the wing being pivotal about the
float axis and the extent of the pivoting being determined by the
ambit of the floating motion of the roller in the roller slot; the
hinge preventing substantial weight transfer between the center
section and wing section when the implement operates over uneven
soil and the guide roller in the roller slot is positioned between
the ends of the slot.
2. The towable agricultural implement of claim 1, wherein the
center section rollers are positioned forwardly, in the direction
of towing, of the wing rollers.
3. The towable agricultural implement of claim 1, wherein the
roller slot and the ball of the ball joint are non-rotationally and
fixedly attached to the center section.
4. The towable agricultural implement of claim 1, wherein the
center section rollers are positioned rearwardly, in the direction
of towing, of the wing rollers.
5. The towable agricultural implement of claim 1, wherein the ball
of the ball joint is mounted to and toward the front of the center
section, the socket of the ball joint is mounted to the wing
section, the guide roller slot is mounted to and toward the rear of
the center section, and the guide roller is mounted to the wing
section.
6. A towable agricultural implement for working the soil,
comprising in combination a longitudinally extending center section
and foldable wings mounted on opposite sides of the center section;
the foldable wings being hinged at their inner ends to opposite
sides of the center section and pivotable about a longitudinal
hinge axis to fold upwardly over the center section for transport
or to unfold downwardly from the folded position for field
operation; the center section and wings having ground-working
elements for working the soil; each wing being connected to the
center section by a hinge having first and second spaced
assemblies, both assemblies having components attached to the wing
and components non-rotationally and fixedly attached to the center
section; a wing float axis passing through the first assembly and
extending perpendicular to the longitudinal hinge axis in a
transverse direction, the wing being pivotal about the float axis
and the extent of pivoting being determined by the ambit of
floating motion of the second assembly's wing-attached and center
section-attached components; the hinge preventing substantial
weight transfer between the center section and wing section when
the implement operates over uneven soil.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to towable agricultural
implements such as soil pulverizers which have a center section and
foldable wing sections mounted on opposite sides of the center
section. The wings are unfolded when working the ground and are
folded when transporting the pulverizer between fields or
elsewhere.
BACKGROUND OF THE INVENTION
[0002] Pulverizers are used by farmers during planting season to
help prepare an ideal seedbed. Since yield is a direct result of
germination, which is dependent on soil conditions at planting
time, having an ideal seedbed is desired. Pulverizers break up
clods and insure good seed to soil contact, reducing germination
time. Since the seedbed is firmed and air pockets are eliminated,
capillary action in the soil is also increased making more moisture
available to the plant through its root.
[0003] As fields become larger and individual farms cover more
acres, equipment has become larger to cover more land in less time.
One way to cover more land is to make machinery wider, but with
that comes the problem of transporting it from field to field. Wide
machinery is typically folded allowing for transport on public
roadways. Inherent to a folding piece of machinery is to have a
hinge point, making the wing fairly rigid with the center section
in that it cannot follow the contour of the field as drawbar
heights vary.
[0004] FIG. 1, for example, shows a conventionally hinged
pulverizer 10 having a drawbar 11 for attaching at one end 12 to a
tractor (not shown) for towing the pulverizer. Drawbar 11 is
attached at its other end to pulverizer center section 13. Center
section 13 includes ground engaging roller wheels 14 constituting
the center roller, transport wheels/rockshaft assembly 15, and
hinge points 16, 17. Wing roller assemblies 18 with ground engaging
roller wheels 19 extend transversely on opposite sides of center
section 13 and are fairly rigidly connected to center section 13 at
the hinge points 16, 17 respectively. When the pulverizer 10 is to
be transported, wing assemblies 18 are folded about hinge points
16, 17 to a position shown, for example, in FIG. 2. A double acting
hydraulic cylinder (not shown) on the center section acts to
initiate and carry out the folding. Wing hinges 24 at hinge points
16, 17 connect the wing assemblies 18 to center section 13 of the
pulverizer by conventional means of a hinge pin 20 and center
section hinge plates and barrel 21, shown in FIG. 6 just prior to
connection.
[0005] As described above, the pulverizer, parts and hinge
connections for the wings are all well known in the prior art.
However, a difficulty with this design is that when the pulverizer
is operational and towed over fields that are not perfectly level,
the height of drawbar 11 varies and weight distribution on the
ground engaging components is affected. In fact, both the said
weight distribution and the depth control of the ground engaging
components are both affected by varying drawbar heights (due to
ground contours), ground contours at the rollers, and ground
obstructions (stones) on the winged pulverizer. It is common in
pulverizers for the wing rollers 19 to be set back from the center
rollers 14 to provide some overlap, ensuring that over the total
width of the pulverizer there are no strips of unconditioned soil.
The varying drawbar heights come into consideration because the
wing rollers are not in line with the center section rollers. More
specifically, FIGS. 3-5 illustrate the effects of this design. In
FIG. 3, the conventionally hinged pulverizer (shown from the left
side) is being towed toward the left down from the top of a ground
contour 25. Shown in exaggerated form, the weight of the center
section is transferred to the wing rollers 19 and the center
section rollers 14 tend to be lifted off the ground. In FIG. 4, a
view towards the rear of the conventionally hinged machine of FIG.
3, the weight of the center section transferred to the wings causes
them to lift at their outer extremities. Since the wings are
allowed to flex about the hinge points, the wing rollers closest to
the hinge now have to carry both the weight of the center section
and the weight of the wings lifted off the ground, resulting in a
poorly conditioned seed bed. As again viewed from the left side of
the pulverizer, FIG. 5 shows what typically happens from the
scenario of FIGS. 3 and 4. The center section is heavier than the
wings due to the weight of the transport wheels/rockshaft assembly
and the drawbar causing a reaction resulting in the wings picking
up at the extremity to a point where the weight carried by the
center section is balanced by the weight carried on the wings.
Ground contact is limited on the wing rollers 19, the center
section conditioning is limited due to the reduced weight on the
center section rollers 14, and the wing roller portions nearest the
hinge are forced to carry extra weight that may cause a packed
groove in the soil.
[0006] In short, with the current conventionally hinged design,
weight from the wings is transferred to the center section or vice
versa. When this happens, portions of the wings or center section
are not engaging the soil, making for inconsistent conditioning.
Also, since weight transfer takes place, the rollers in contact
with the soil have to carry extra weight, which gives the
possibility of those rollers sinking into the ground and pushing
the soil rather than rolling over the top of the soil, or packing
the soil making it more difficult for germinating seeds and plants
to break through. The conventional hinge design of FIG. 6 allows
the wings to fold over the top of the center section, but does not
allow any freedom for the wings to maintain uniform ground control
as the drawbar height changes, causing the machine to rock about
the center section rollers.
[0007] Attempts have been made in the past to deal with farm
machines operating on uneven ground. See, for example, U.S. Pat.
No. 93,959 (1869) involving the connection of two harrows operating
side by side to form a double harrow. The side of a first harrow
adjacent its longitudinal ends has two hoops, and the side of a
second harrow adjacent its longitudinal ends has two arms to fit
within the corresponding two hoops in the first harrow when the
second harrow is positioned at a right angle to the first harrow.
There is no center section between the two harrows which are
positioned side by side, and no folding rotation between the two
harrows. Each frame can move up and down or back and forth with
respect to the other to a limited extent to provide a limited
independent movement over uneven ground. There is no hinge or joint
connection between the two frames. Each harrow frame has a separate
chain draught connection for the protection and comfort of the
towing horses. Among other deficiencies, the design of the '959
patent does not lend itself to solving the above-described
difficulties of the conventionally hinged pulverizer having a
drawbar, a center section with rollers, and the center section
rollers positioned forward of folding-wing rollers.
[0008] Further, see for example U.S. Pat. No. 6,325,155 (2001)
involving a design having a center frame and opposing double wings
of inner and outer wing sections which are intended to follow
ground elevation. A linkage allows the inner wings to move
perpendicular to the center section, and there is a draft cable to
help distribute the draft load generated by the outer wings. A
universal joint having three axes of freedom connects the inner
wing sections to the center section. A differential control rod
parallel to the center section is required and which controls the
universal joint. An "L"-shaped linkage controls the movement of a
pivot in a slot, the linkage being pivotally attached to the center
frame and differential control bar. The center frame and universal
joint are rotated ninety degrees in passing between the transport
and field operational modes. The wings fold rearwardly into the
transport mode. Altogether, this three-axis arrangement of parts
and motions is overly complex for the needs satisfied by
applicant's invention involving a considerably simpler structure
and functioning.
SUMMARY OF THE INVENTION
[0009] The present invention is intended to avoid the
above-discussed difficulties of conventionally hinged pulverizers.
The proposed new design focuses on the hinge area of the winged
implement and allows the wings to act independently of the center
section as if the center section and opposing wing sections were
three separate implements being towed but integrated into a single
machine. All three sections can follow the contour of the soil
surface and uniform conditioning of the soil can thus be obtained,
contours or not. The new design utilizes a similar pulverizer
center section and foldable wings on opposite sides of the center
section. The wing rollers are placed rearwardly of the center
section rollers, and a new simple hinge design is applied. The
center section rollers may also be placed behind or co-linear with
the wing rollers. Folding is not affected with the new design, and
the wings are still folded upwardly and over the top by the
well-known double acting hydraulic cylinder and associated
components. However, another degree of limited freedom is added to
the machine to apply a limited floating action to the wings.
[0010] More specifically, the hinge between each wing and the
center section includes a ball joint adjacent one end of the hinge,
and a guide roller in a roller slot adjacent the other end of the
hinge. Certain components of the hinge, i.e., the ball of the ball
joint and the roller slot, are non-rotationally and fixedly
attached to the center section. The hinge axis extends
substantially in a longitudinal direction from front to rear of the
center section and passes through the ball joint and the guide
roller The terms "longitudinal" and "longitudinal hinge axis" as
used herein are intended to include a few degrees variation
sideways from true longitudinal to allow folding of the wings
without interferring with each other as shown in FIG. 2; as well as
a few degrees up and down from true longitudinal as the guide
roller moves up or down in the guide roller slot. The ball joint
and the roller in the roller slot allow the wing to be folded up
over the center section. Further, the ball joint and guide roller
in roller slot allow a floating action of the wing about a further
"float" axis perpendicular to the hinge axis to a degree determined
by the depth of the roller slot. The hinge pin and hinge
plates/barrels of the conventionally hinged pulverizer are
eliminated. The floating action provided prevents the undesirable
weight transfer from the wing sections to the center section and
vice versa, through the designated range of floating provided by
the new hinge design. The pulverizer thus is now able to conform to
the contour of the soil to ensure that uniform conditioning takes
place across the entire width of the machine. A further feature of
the design is that if an obstacle such as a stone is encountered
while in use, the section that rolls over the stone does not affect
the rest of the machine since there is no weight transfer between
sections.
[0011] It should also be noted that the new hinge design allows the
pulverizer to be backed up in a field without the wings
interferring when in the operating position.
[0012] Other features and advantages of the present invention will
be apparent from the following description, drawings and
claims.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] FIG. 1 is a perspective view of a conventionally hinged
pulverizer with a center section and unfolded wing sections. Parts
not essential to a discussion of the background and substance of
the present invention are not shown;
[0014] FIG. 2 is a perspective view of the conventionally hinged
pulverizer of FIG. 1, but with the wings folded upward and over the
center section for transport of the pulverizer;
[0015] FIG. 3 is a left side elevation of the pulverizer of FIG. 1
showing a particular operating tendency with the conventional hinge
and unfolded wings;
[0016] FIG. 4 is a rear view of the conventionally hinged
pulverizer of FIG. 1 under the operating tendency of FIG. 3;
[0017] FIG. 5 is a left side elevation of the pulverizer of FIG. 1
showing the operating scenario that results from the FIGS. 3 and 4
operating tendencies;
[0018] FIG. 6 is a perspective view of the conventional hinge
components for the pulverizer of FIGS. 1-5;
[0019] FIG. 7 is a perspective view corresponding to FIG. 1 of a
pulverizer utilizing the present invention;
[0020] FIG. 8 is a perspective view of the new design of the
components of the present invention to provide the desired hinged
and floating wings;
[0021] FIG. 9 is a rear view of the pulverizer of FIG. 7 (but
showing only one wing) and illustrating a first wing floating
operational scenario;
[0022] FIG. 10 is a rear view of the pulverizer of FIG. 7 (but
showing only one wing) and illustrating a second wing floating
operational scenario;
[0023] FIG. 11 is a right side elevation of the pulverizer of the
present invention, in operational position and illustrating the
guide roller at the bottom of the guide roller slot;
[0024] FIG. 12 is a right side elevation of the pulverizer of the
present invention, in operational position and illustrating the
guide roller several inches up from the bottom of the guide roller
slot; and
[0025] FIG. 13 is a right side elevation of the pulverizer of the
present invention, in operational position and illustrating the
guide roller raised to the top of the guide roller slot.
DETAILED DESCRIPTION OF EMBODIMENT
[0026] Referring to FIG. 7, the pulverizer 30 is shown assembled
with drawbar 31 for towing center section frame 32 having forwardly
positioned center section rollers 33, wings 34 and 35 with wing
rollers 36 and the wings being unfolded and extended on opposite
sides of center section 32, the transport wheels and axle and
rockshaft assembly 37, and the new hinge joints 38 and 39. FIG. 8
illustrates the enlarged and exploded hinge joint 39 positioned on
the side of the center section as shown in FIG. 7, there being a
corresponding hinge joint 38 present on the opposite side of center
section 32 to connect wing 35. The following discussion, therefore,
correspondingly applies to hinge joint 38 as well.
[0027] Referring to FIG. 8, new hinge joint 39 is comprised of
roller slot 50 which is part of center section 32 at the outside
rear of that section, guide roller 51 attached to wing 34 at its
inner rear portion for mounting in roller slot 50 for up and down
motion therein, ball joint ball 52 mounted on center section 32 at
the outside front of that section, and ball joint socket 53
attached to the wing at its inner front portion for joining with
ball 52 to form an assembled ball joint 60. The assembled ball
joint, along with guide roller 51 inserted into roller slot 50,
allows the wing 34 to fold up over center section 32 in the same
manner as in FIG. 2, but here about a hinge "folding" axis defined
by the assembled ball joint and guide roller 51.
[0028] In addition, by virtue of the combination of the ball joint
and the guide roller-roller slot, wing 34 also can rotate about the
ball joint to a limited degree (defined by the guide roller and
roller slot) about a transverse axis through the assembled ball
joint essentially perpendicular to the axis of folding. This allows
the wing 34 to in effect "float" over obstacles, and this further
axis is thus referred to as "float" axis 55-55. These two
perpendicular axes allow two degrees of freedom for the wing to
move in, and prevent weight transfer from the wings to the center
section and vice versa as previously discussed as long as guide
roller 51 is free to move in the ambit of roller slot 50 and is not
forced against the top or bottom of the slot. The pulverizer is now
able to conform to the contour of the soil, ensuring that uniform
conditioning takes place along the entire width of the machine.
[0029] Another feature of the present invention is that if an
obstacle such as a stone is encountered while in use, the section
rolling over the stone does not affect the rest of the machine
because of the lack of weight transfer between the sections. See,
for example FIGS. 9 and 10, views from the rear of the pulverizer
(left wing eliminated for ease of depiction). In each case the
right wing is "floating" over an obstacle while in operation due to
the ability of the guide roller to move in the roller slot and wing
35 thus able to pivot about the float axis 55-55 (FIGS. 7 and 8).
In FIG. 9 the outer portion of the wing 35 is in contact with the
soil surface due to the mass center of the wing being outboard of
the stone S being passed over. In FIG. 10 the inner portion of the
wing 35 is in contact with the soil surface due to the mass center
of the wing being inboard of the stone S being passed over. In
neither case is there weight transfer from the wing 35 to the
center section 32 nor vice versa. In FIG. 9, the guide roller 51
has moved toward the top of roller slot 50; in FIG. 10, the guide
roller 51 has moved toward the bottom of roller slot 50.
[0030] FIGS. 11-13 are right side elevational views of the
pulverizer respectively showing guide roller 51 at the bottom of
slot 50 (FIG. 11), guide roller 51 in the middle of slot 50 (FIG.
12) several inches from the slot bottom, and guide roller 51 at the
top of slot 50 (FIG. 13) several further inches from the slot
bottom. In FIGS. 11-13, the various elevations of the wing rollers
36 can be noted for the different operating conditions.
[0031] When the wings are to be folded upwardly for transport, the
folding action may begin with the guide roller at the bottom of the
guide slot. As a safety measure, a cam or other retaining means may
then be used to move into position to hold the guide roller at the
bottom of the slot during and after the folding to stabilize the
wing until unfolded.
[0032] The present invention also may be used on agricultural
implements other than a pulverizer that have a center section and
foldable wing sections on opposite sides of the center section.
[0033] It will be appreciated by persons skilled in the art that
variations and/or modifications may be made to the present
invention without departing from the spirit and scope of the
invention. For example, the ball joint may be mounted toward the
rear (rather than the front) of the center section, and the guide
roller in roller slot may be mounted towards the front (rather than
rear) of the center section. Further, the ball of the ball joint
may be mounted on the wing section (rather than the center
section), and the socket of the ball joint may be mounted on the
center section (rather than on the wing section). Additionally, the
guide roller slot may be mounted on the wing section (rather than
the center section) and the guide roller may be mounted on the
center section (rather than the wing section). In these various
permutations, the wing will still fold and unfold about a
longitudinal hinge axis, and still float about an orthogonal float
axis.
[0034] Still further, the ball joint could be replaced by an
assembly of plates and tubes to act as part of the folding hinge
and provide a float axis as well; and, the guide roller in guide
slot could be replaced by a combination of rollers to achieve the
limited ambit of travel of the wing about the orthogonal float
axis. Such means, however, do involve more complexity and more
parts.
[0035] The present embodiment is, therefore, to be considered as
illustrative and not restrictive.
* * * * *