U.S. patent application number 12/419502 was filed with the patent office on 2010-10-07 for guage wheel for an agricultural implement.
Invention is credited to Polina Aronova, Scott Cassidy, Nathan A. Mariman.
Application Number | 20100251947 12/419502 |
Document ID | / |
Family ID | 42380016 |
Filed Date | 2010-10-07 |
United States Patent
Application |
20100251947 |
Kind Code |
A1 |
Mariman; Nathan A. ; et
al. |
October 7, 2010 |
GUAGE WHEEL FOR AN AGRICULTURAL IMPLEMENT
Abstract
A gauge wheel for an agricultural implement includes a rim
having an outer periphery and a tire mounted to the outer
periphery. The tire includes an outer shell formed from a first
resilient material and an inner core formed from a second resilient
material. The first resilient material is harder than the second
resilient material.
Inventors: |
Mariman; Nathan A.;
(Geneseso, IL) ; Aronova; Polina; (Port Byron,
IL) ; Cassidy; Scott; (DeForest, WI) |
Correspondence
Address: |
Taylor IP, P.C/Deere & Company
142 S. Main Street, P.O. Box 560
Avilla
IN
46710
US
|
Family ID: |
42380016 |
Appl. No.: |
12/419502 |
Filed: |
April 7, 2009 |
Current U.S.
Class: |
111/149 ;
152/379.3 |
Current CPC
Class: |
A01C 7/203 20130101;
B60C 7/105 20130101; Y10T 152/10648 20150115; B60C 7/26 20130101;
A01C 5/064 20130101; Y10T 152/10657 20150115; B60C 7/102 20130101;
A01C 5/068 20130101 |
Class at
Publication: |
111/149 ;
152/379.3 |
International
Class: |
A01C 5/00 20060101
A01C005/00; B60C 15/02 20060101 B60C015/02 |
Claims
1. A gauge wheel for an agricultural implement, said gauge wheel
comprising: a rim having an outer periphery; and a tire mounted to
said outer periphery, said tire including an outer shell formed
from a first resilient material and an inner core formed from a
second resilient material, said first resilient material being
harder than said second resilient material.
2. The gauge wheel of claim 1, wherein said first resilient
material has a durometer rating of between 80 to 100 durometer, and
said second resilient material has a durometer rating of between 20
to 40 durometer.
3. The gauge wheel of claim 2, wherein said first resilient
material has a durometer rating of approximately 90 durometer.
4. The gauge wheel of claim 2, wherein said first resilient
material is a first urethane material, and said second resilient
material is a different second urethane material.
5. The gauge wheel of claim 1, wherein said outer periphery of said
rim includes a first keying feature, and one of said outer shell
and said inner core includes a second keying feature, said first
keying feature and said second keying feature coacting to hold said
tire on said outer periphery of said rim during operation of said
gauge wheel.
6. The gauge wheel of claim 5, wherein said first keying feature is
a recess in said outer periphery of said rim, said second keying
feature is a projection from said inner core which is positioned
within said recess.
7. The gauge wheel of claim 1, wherein said rim has a hub and a web
extending radially outward from said hub to said outer periphery,
said outer periphery including a first annular recess and said
outer shell of said tire including a second annular recess, said
inner core positioned partially within each of said first annular
recess and said second annular recess.
8. The gauge wheel of claim 1, wherein said rim has a hub and a web
extending radially outward from said hub to said outer
periphery.
9. The gauge wheel of claim 8, including a steel bushing within
said hub.
10. The gauge wheel of claim 8, wherein said rim is constructed
from one of machined metal and molded plastic.
11. The gauge wheel of claim 1, wherein said agricultural implement
is an agricultural seeder.
12. An agricultural implement, comprising: a tool bar; and at least
one row unit carried by said tool bar, each said row unit including
a furrow opener arrangement with a gauge wheel, said gauge wheel
including: a rim having an outer periphery; and a tire mounted to
said outer periphery, said tire including an outer shell formed
from a first resilient material and an inner core formed from a
second resilient material, said first resilient material being
harder than said second resilient material.
13. The agricultural implement of claim 12, wherein said first
resilient material has a durometer rating of between 80 to 100
durometer, and said second resilient material has a durometer
rating of between 20 to 40 durometer.
14. The agricultural implement of claim 13, wherein said first
resilient material has a durometer rating of approximately 90
durometer.
15. The agricultural implement of claim 13, wherein said first
resilient material is a first urethane material, and said second
resilient material is a different second urethane material.
16. The agricultural implement of claim 12, wherein said outer
periphery of said rim includes a first keying feature, and one of
said outer shell and said inner core includes a second keying
feature, said first keying feature and said second keying feature
coacting to hold said tire on said outer periphery of said rim
during operation of said gauge wheel.
17. The agricultural implement of claim 16, wherein said first
keying feature is a recess in said outer periphery of said rim,
said second keying feature is a projection from said inner core
which is positioned within said recess.
18. The agricultural implement of claim 12, wherein said rim has a
hub and a web extending radially outward from said hub to said
outer periphery, said outer periphery including a first annular
recess and said outer shell of said tire including a second annular
recess, said inner core positioned partially within each of said
first annular recess and said second annular recess.
19. The agricultural implement of claim 12, wherein said rim has a
hub and a web extending radially outward from said hub to said
outer periphery, and wherein said hub, said web and said outer
periphery are integrally and monolithically constructed
together.
20. The agricultural implement of claim 19, including a steel
bushing within said hub.
21. The agricultural implement of claim 19, wherein said rim is
constructed from one of machined metal and molded plastic.
22. The agricultural implement of claim 12, wherein said
agricultural implement is an agricultural seeder.
23. A wheel, comprising: a rim having an outer periphery; and a
tire mounted to said outer periphery, said tire including an outer
shell formed from a first resilient material and an inner core
formed from a second resilient material, said first resilient
material being harder than said second resilient material.
24. The wheel of claim 23, wherein said first resilient material
has a durometer rating of between 80 to 100 durometer, and said
second resilient material has a durometer rating of between 20 to
40 durometer.
25. The wheel of claim 24, wherein said first resilient material is
a first urethane material, and said second resilient material is a
different second urethane material.
26. The wheel of claim 23, wherein said outer periphery of said rim
includes a first keying feature, and one of said outer shell and
said inner core includes a second keying feature, said first keying
feature and said second keying feature coacting to hold said tire
on said outer periphery of said rim during operation of said gauge
wheel.
27. The wheel of claim 26, wherein said first keying feature is a
recess in said outer periphery of said rim, said second keying
feature is a projection from said inner core which is positioned
within said recess.
28. The wheel of claim 23, wherein said rim has a hub and a web
extending radially outward from said hub to said outer periphery,
said outer periphery including a first annular recess and said
outer shell of said tire including a second annular recess, said
inner core positioned partially within each of said first annular
recess and said second annular recess.
29. The wheel of claim 23, wherein said rim has a hub and a web
extending radially outward from said hub to said outer periphery,
and wherein said hub, said web and said outer periphery are
integrally and monolithically constructed together.
30. The wheel of claim 29, wherein said rim is constructed from one
of machined metal and molded plastic.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to agricultural seeders, and,
more particularly, to furrow opener arrangements for such
seeders.
BACKGROUND OF THE INVENTION
[0002] An agricultural seeder such as a row crop planter or grain
drill places seeds at a desired depth within a plurality of
parallel seed trenches formed in soil. In the case of a row crop
planter, a plurality of row crop units are typically ground driven
using wheels, shafts, sprockets, transfer cases, chains and the
like. Each row crop unit has a frame which is moveably coupled with
a tool bar. The frame may carry a main seed hopper, herbicide
hopper, insecticide hopper, furrow opener arrangement, furrow
closer arrangement, etc.
[0003] One type of furrow opener arrangement uses a depth gauge
wheel which is placed adjacent to the leading edge of a single disc
opener assembly including a seed tube on the trailing side of the
disc. The gauge wheel provides depth adjustment, cleans the leading
face of the disc, and limits soil lifting and throw adjacent the
disc opener.
[0004] Gauge wheels are typically manufactured with a rubber tire
which is mounted to the outer periphery of a multi-piece, clam
shell type rim. The outer radial periphery of each clam shell half
of the rim is flared and the tire is sandwiched therebetween.
Fasteners such as bolts or rivets are then used to bolt the clam
shell halves of the rim together.
[0005] A gauge wheel as described above is part of an effective
furrow opener arrangement. However, the multi-piece clam shell
arrangement makes the gauge wheel more time consuming and costly to
manufacture. Moreover, the rubber tire compromises between wear
resistance and shock absorbance. If the rubber is too hard, it will
not absorb shock sufficiently when traveling over uneven or rough
ground. If the rubber is too soft, it will wear prematurely when
traveling over stubbly fodder present in no-till field
environments.
[0006] What is needed in the art is a furrow opener arrangement
with a gauge wheel which is easier and cheaper to manufacture, has
good wear characteristics, and good shock absorbing
characteristics.
SUMMARY OF THE INVENTION
[0007] The invention in one form is directed to a gauge wheel for
an agricultural implement, including a rim having an outer
periphery and a tire mounted to the outer periphery. The tire
includes an outer shell formed from a first resilient material and
an inner core formed from a second resilient material. The first
resilient material is harder than the second resilient
material.
[0008] The invention in another form is directed to an agricultural
implement, including a tool bar and at least one row unit carried
by the tool bar. Each row unit includes a furrow opener arrangement
with a gauge wheel. The gauge wheel includes a rim with an outer
periphery and a tire mounted to the outer periphery. The tire
includes an outer shell formed from a first resilient material and
an inner core formed from a second resilient material. The first
resilient material is harder than the second resilient
material.
[0009] The invention in yet another form is directed to a wheel
including a rim having an outer periphery, and a tire mounted to
the outer periphery. The tire includes an outer shell formed from a
first resilient material and an inner core formed from a second
resilient material. The first resilient material is harder than the
second resilient material.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIG. 1 is a side view of an agricultural seeder including a
row crop unit with an embodiment of a gauge wheel of the present
invention;
[0011] FIG. 2 is a perspective, partially fragmentary view of the
gauge wheel shown in FIG. 1;
[0012] FIG. 3 is a side sectional view of the gauge wheel shown in
FIGS. 1 and 2, taken along line 3-3 in FIG. 2;
[0013] FIG. 4 is a side, sectional view of another embodiment of a
gauge wheel of the present invention;
[0014] FIG. 5 is a side, sectional view of another embodiment of a
gauge wheel of the present invention;
[0015] FIG. 6 is a perspective, sectional view of the gauge wheel
shown in FIG. 5;
[0016] FIG. 7 is a side, sectional view of another embodiment of a
gauge wheel of the present invention; and
[0017] FIG. 8 is a side, sectional view of another embodiment of a
gauge wheel of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0018] Referring now to the drawings, and more particularly to FIG.
1, there is shown an embodiment of an agricultural seeder 1 0 of
the present invention. In the embodiment shown, seeder 10 is in the
form of a row crop planter but may also be in the form of a grain
drill, etc. FIG. 1 illustrates a single row crop unit 12 of a
multi-row planter, with each row crop unit 12 being substantially
identical and connected to a common tool bar 14. Only a single row
crop unit 12 is shown for simplicity sake.
[0019] Row crop unit 12 includes a frame 16 which is attached to
tool bar 14 by parallel linkage 18. Tool bar 14 is coupled to a
traction unit (not shown), such as an agricultural tractor. For
example, tool bar 14 may be coupled to an agricultural tractor
using a 3-point hitch assembly. Tool bar 14 may be coupled with
transport wheel assemblies, marker arms, etc. which may be of
conventional design and not shown for simplicity sake. The
transport wheels, in known manner, may provide ground drive to row
crop unit 1 2 through the use of shafts, chains, sprockets,
transfer cases, etc.
[0020] Frame 16 carries an opener arrangement 20 for forming a seed
trench in soil. Opener arrangement 20 includes a disc opener 22 and
an adjacent gauge wheel 24. Gauge wheel 24 is pivotally coupled
with frame 16 by an arm (not specifically shown). Gauge wheel 24
may be vertically adjusted to adjust the depth of the trench which
is cut into the soil using disc opener 22.
[0021] Gauge wheel 24 generally includes a rim 26 and a tire 28
(FIGS. 2 and 3). In the illustrated embodiment, rim 26 has a
clamshell construction with a first clamshell half 30 and a second
clamshell half 32 which are joined together using fasteners such as
bolts 34. At the radially inboard end, first clamshell half 30 and
second clamshell half 32 define a hub 36 which carries a steel
bushing 38. Steel bushing 38 is sized and configured to receive a
bearing, which in turn is mounted to an axle shaft (not shown). At
the radially outboard end, first clamshell half 30 and second
clamshell half 32 define an outer periphery 40 of rim 26. Tire 28
is mounted to outer periphery 40.
[0022] Tire 28 includes an outer shell 42 and an inner core 44.
Outer shell 42 is constructed from a material which is adapted to
provide good wear of tire 28 when traveling over stubbly ground,
such as may occur in no till soil conditions. Inner core 44 is
constructed from a material which is adapted to cushion and absorb
impact loads, and to flex to an extent such that tire 28 can shed
mud during operation. More particularly, outer shell 42 is formed
from a first resilient material and inner core 44 is formed from a
different second resilient material. The first resilient material
making up outer shell 42 is harder than the second resilient
material making up inner core 44. In the illustrated embodiment,
the first resilient material has a durometer rating of between
80-100 durometer (preferably approximately 90 durometer), and the
second resilient material making up inner core 44 has a durometer
rating of between 20-40 durometer. In one embodiment, the first
resilient material making up outer shell 42 is constructed from a
first urethane material and the second resilient material making up
inner core 44 is formed from a different second urethane
material.
[0023] To hold tire 28 in place on rim 26 during operation, the
outer periphery 40 of rim 26 includes a first keying feature 46 in
the form of an annular recess. Inner core 44 likewise includes a
second keying feature in the form of an annular projection 48 which
is positioned within annular recess 46. Annular recess 46 and
annular projection 48 coact with each other to hold tire 28 in
position on the outer periphery 40 of rim 26 during operation of
gauge wheel 24.
[0024] Similarly, to retain outer shell 42 on inner core 44, outer
shell 42 has a radially inner surface defining a second angular
recess 50. Inner core 44 includes a second annular projection 52,
opposite annular projection 48, which fits into second annular
recess 50. Inner core 44 is thus positioned partially within each
of the first annular recess 46 and second annular recess 50.
[0025] With reference to the remaining figures, other embodiments
of gauge wheels of the present invention will be described in
greater detail hereinafter. For each embodiment, it is to be
understood that the gauge wheel includes a tire with an inner core
and an outer shell, each made from different resilient materials,
with the inner core being softer than the outer shell. The
construction of the tire in this manner provides good wear, good
shock absorbance, and good mud shedding capabilities.
[0026] Referring now to FIG. 4, there is shown another embodiment
of a gauge wheel 60 of the present invention. Tire 62 is
constructed generally the same as tire 28 shown in FIGS. 1-3.
However, rim 64 is constructed as a one piece molded part with a
steel bushing 66 for retaining a bearing associated with an axle
shaft. Rim 64 is thus constructed as an integral and monolithic rim
which carries tire 62 and steel bushing 66. Rim 64 is preferably
constructed as a rigid, molded plastic part, but could also be
constructed from machined or molded metal such as aluminum.
[0027] Referring now to FIGS. 5 and 6, there is shown another
embodiment of a gauge wheel 70 of the present invention. Gauge
wheel 70 includes a tire 72 which is mounted to a rim 74. Tire 72
includes an inner core 76 and an outer shell 78, as do gauge wheels
24 and 60 shown in FIGS. 1-3 and 4 above. However, tire 72 is not
held in place relative to rim 74 using keying between inner core 76
and the outer periphery 80 of rim 74. Referring to FIG. 5, it is
evident that the outer periphery 80 of rim 74 is generally flat in
the area adjacent to inner core 76. On the other hand, it is also
evident that outer periphery 80 has a stepped shoulder on the left
side where it engages with and keys to outer shell 78 of tire
72.
[0028] As with the embodiment of gauge wheel 60 shown in FIG. 4,
gauge wheel 70 also has a one piece rim with a hub 82, radially
extending web 84, and outer periphery 80 which are integrally and
monolithically constructed together. A steel bushing 86 carries a
bearing 88 and axle shaft 90, which in turn is mounted to an arm 92
mounted to the frame of the row crop unit. Web 84 also includes
curved, axially extending reinforcing ribs 94 which terminate along
an outer edge of outer periphery 80.
[0029] Referring now to FIG. 7, there is shown another embodiment
of a gauge wheel 100 of the present invention. Gauge wheel 100
includes a tire 102 which is mounted to a one piece rim 104. Tire
102 has an inner core 106 which is keyed to the outer periphery 108
of rim 104. Tire 102 also has an outer shell 110 with a radially
inwardly extending wall 112 which terminates adjacent to the
outside diameter of hub 114.
[0030] Referring now to FIG. 8, another embodiment of a gauge wheel
120 of the present invention is shown. In this embodiment, rim 122
has a metal core 124, such as aluminum, over which is molded on
opposite axial sides, a glass-filled nylon or other plastic shell
126. Tire 128 includes an inner core 130 which is keyed to the
outer periphery 132 of rim 122. Inner core 130 may be injection
molded into the space between outer periphery 132 and outer shell
134 using a urethane with a foaming agent.
[0031] As shown in FIG. 8, gauge wheel 120 can be formed with an
inner core 130 which is partially hollow or cored out. For example,
a portion of the cross sectional area of inner core 130 can be
optionally cored out as shown by dashed line 136. It will be
appreciated that the cored out area has an annular shape extending
around gauge wheel 120, within inner core 130. Of course, any of
the inner cores shown in the other embodiments can also be
partially cored out. Such a cored out area within the inner core
may provide desirable load damping characteristics and mud
shedding.
[0032] In the embodiments shown, the gauge wheel is used in
conjunction with an agricultural seeder in the form of a row crop
planter. However, it is also to be understood that the gauge wheel
may also be used for other applications, such as a wheel for a
fertilizer applicator, mower, etc.
[0033] Having described the preferred embodiment, it will become
apparent that various modifications can be made without departing
from the scope of the invention as defined in the accompanying
claims.
* * * * *