U.S. patent number 3,771,299 [Application Number 05/259,792] was granted by the patent office on 1973-11-13 for harvesting reel.
Invention is credited to Donald R. Gradwohl, Archie E. Neal.
United States Patent |
3,771,299 |
Gradwohl , et al. |
November 13, 1973 |
HARVESTING REEL
Abstract
A plurality of identical spiders are removably secured to an
elongated, lightweight, thin walled center tube having good
resistance to bending. Each spider comprises a hub member having
short arm stubs and elongated arm section secured to the stubs. The
arm stubs and the arm sections are of channel form in cross
section, and each includes radially disposed web and gusset
portions providing resistance to bending angularly of the reel and
flanges of substantial depth providing resistance to bending
axially of the reel. Bat support shafts are secured to the outer
ends of the arms and tine carrying bats are secured to these
shafts. The radial inner space between the shafts and bats and the
center tube is devoid of any truss structure which would interfere
with the operation of the pick-up reel.
Inventors: |
Gradwohl; Donald R. (Garfield,
WA), Neal; Archie E. (Garfield, WA) |
Family
ID: |
26758921 |
Appl.
No.: |
05/259,792 |
Filed: |
June 5, 1972 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
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77132 |
Oct 1, 1970 |
3703060 |
Nov 21, 1972 |
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Current U.S.
Class: |
56/220 |
Current CPC
Class: |
A01D
57/03 (20130101) |
Current International
Class: |
A01D
57/00 (20060101); A01D 57/03 (20060101); A01d
057/02 () |
Field of
Search: |
;56/219-227 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Mancene; Louis G.
Assistant Examiner: Oliff; J. A.
Parent Case Text
CROSS-REFERENCE TO RELATED APPLICATION
This is a division of my copending application, Ser. No. 77,132,
filed Oct. 1, 1970, now U.S. Pat. No. 3,703,060, Nov. 21, 1972, and
entitled Harvesting Reel.
Claims
What is claimed is:
1. In a harvester reel:
an elongated thin walled center tube of substantial diameter having
a good resistance to bending;
a plurality of spiders secured to said center tube at locations
spaced axially along its length, each spider being characterized by
a plurality of circumferentially spaced apart radial arms, each
said radial arm being of channel shape in cross section and
comprising a pair of relatively deep flanges extending generally
axially of the reel and an interconnecting radial web, said arms
having substantial sectional depth in their extent both axially and
angularly of the tube, enabling such arms to resist bending, with
the arms of each spider being axially aligned with the arms of the
other spiders;
a plurality of elongated bat support rods equal in number to the
radial arms, each bat support rod extending axially of the center
tube at the ends of said radial arms;
means securing each bat support rod to the outer ends of an aligned
axial row of radial arms;
an elongated bat secured to each support, each said bat carrying a
plurality of spaced apart generally vertically oriented pick-up
tines; and
with the radial space between the bat support rods and the center
tube being open.
2. The invention of claim 1, wherein each spider comprises a hub
member having a plurality of relatively short arm stubs, and an
elongated arm section secured to each arm stub, with the arm
sections and the arm stubs together forming the said radial support
arms.
3. The invention of claim 2, wherein each arm stub comprises a pair
of angularly spaced apart radial gussets in coplanar parallelism, a
radial web spaced axially from said gussets, and a pair of
generally axially extending flanges interconnected between the web
and the gussets, and wherein at least the inner end portion of each
arm section also includes gussets, a web and flanges, and sized to
snugly nest against its stub arm, and wherein fasteners extend
axially of the reel through the gussets of the arm stubs and the
gussets of the arm sections, for firmly securing said arm sections
and said arm stubs together.
4. In a harvester reel of a type having an axial center tube
portion, an elongated bat support arm of channel form in cross
section, said arm comprising a pair of angularly spaced apart
gussets which are in coplanar parallelism and in use extend
generally radially of the reel, a web which in use is spaced
axially of the reel from said gussets, and a pair of substantially
deep flanges which in use extend axially of the reel and are
rigidly interconnected between the web and the gussets, and means
for firmly securing said gussets to an axial center tube portion of
the reel, said flanges providing substantial sectional depth
axially of the reel and said gussets and said web providing
substantial sectional depth angularly of the reel so that the arms
are capable of resisting bending; and
bat rod bearing means at the outer end of said arm, said bearing
means comprising a bearing base having a shank portion snugly
fittable into the channel space between said flanges and an outer
end portion carrying a radially outwardly directed semi-cylindrical
recess which in use extends axially of the reel, a bearing cap
outwardly of said outer end portion including a complementary
semi-cylindrical recess, a generally U-shaped clamp having a bight
portion resting against said bearing cap and a pair of tines
resting against the arm flanges, and fastener members extending
transversely through said clamp tines, and said arm flanges and the
shank portion of the bearing base.
5. In a harvester reel, a composite spider which in use is located
in a plane extending transversely of the harvester reel axis, such
spider comprising:
a hub member having a plurality of relatively short arm stubs, each
said arm stub being of channel shape in cross section and
comprising a pair of angularly spaced apart gussets which are in
coplanar parallelism and in use extend generally radially of the
reel, a web which in use is spaced axially of the reel from said
gussets, and a pair of flanges which in use extend generally
axially of the reel and are rigidly interconnected between the web
and the gussets, said hub member further comprising a polygonal
pattern of cross flanges which are interconnected between the base
portions of the arm stub flanges, and a central web portion which
is substantially a continuation of the webs of the arm stubs;
an elongated arm section of channel shape in cross section secured
to each arm stub, with at least the inner end portion of each arm
section also including gussets, a web and flanges, arranged and
sized to snugly nest against the gussets, web and flanges of its
stub arm; and
fasteners extending through the gussets of the arm stubs and the
gussets of the arm sections and firmly securing said arm sections
and arm stubs together.
6. The invention of claim 5, wherein the gussets are integrally
connected to said cross flanges at their bases.
7. The invention of claim 5, further comprising means for removably
securing the hub member to a radially extending polygonal mounting
plate fixed to an axial center tube part of the pick-up reel, said
means comprising a central polygonal aperture in the hub member,
complementary to and adapted to receive said polygonal plate, and
fastener receiving openings in the hub member alignable with
similar fastener receiving openings in the plate when the polygonal
aperture is positioned out of alignment with the polygonal plate,
and fastener means insertable through the aligned openings for
securing the hub member to the mounting plate.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to improvements in harvester pick-up
reels, and in particular to a simplified reel construction in which
many of the brace members of conventional reels which during use
interfere with harvesting have been eliminated, and to an improved
eccentric device for driving the pick-up bats.
2. Description of the Prior Art
U.S. Pat. No. 2,823,511, granted Feb. 18, 1958 to Clarence E.
Beaty, and U.S. Pat. No. 3,145,520 , granted Aug. 25, 1964 to James
D. Hume and Earl L. Scheidenhelm show a type of harvester pick-up
reel which has been in common use for a long time. This style of
reel is characterized by a relatively small diameter center shaft,
a plurality of spiders comprised of support arms radiating from
said shaft for supporting tine carrying bats, a polygonal pattern
of cross brace members interconnected between the outer ends of the
radial arms of each spider, and an internal truss structure
composed of a plurality of truss rods surrounding the center shaft
and functioning to reinforce the shaft against bending. Although
functionally adequate, pick-up reels of this type are time
consuming to make, require considerable inventory of different
parts which the manufacturer must keep on hand in order to furnish
a selection of sizes of harvester reel, and the truss rods and
other brace members require frequent adjustment and maintenance
while in the field. Also, the truss rods and other brace members to
some extent interfere with harvesting.
It is known to eliminate the truss rods by substituting a large
diameter thin walled tube for the center shaft, which tube is
capable of withstanding substantial bending, and to eliminate the
cross braces between the outer ends of the bat support arms by
providing relatively strong spider structures. An example of this
type of reel is the "Profiteer M'3" pick-up reel manufactured by
the Universal Harvester Company of Stockton, California.
SUMMARY OF THE INVENTION
This invention relates to improvements in pick-up reels of the type
which are free of truss rods and cross braces. Pick-up reels
according to this invention are characterized by a composite spider
which includes a preferably cast aluminum hub member which is
removably secured to a large diameter, lightweight, thin walled
center tube, and formed steel arm sections which are secured to arm
stub portions of the hub member. The arm stubs and the arm sections
together provide the spider with support arms of channel form in
cross section which utilize a minimum amount of material but which
possesses sufficient strength for resisting bending both angularly
and axially of the pick-up reel. The invention also relates to an
improved eccentric drive mechanism for the bats. The eccentric
drive mechanism of the invention is simple in construction and is
characterized by a circular pattern of support bearings which
travel on the outside of a cylindrical track.
A particularly advantageous feature of the pick-up reel
construction of this invention is that it enables the manufacturer
to provide a large number of reel sizes with a relatively small
inventory of differing parts since most parts of the reel are
common to all sizes and some of the remaining parts differ only in
terms of length.
BRIEF DESCRIPTION OF THE DRAWING
In the drawing like letters and numerals refer to like parts,
and:
FIG. 1 is an isometric view of one embodiment of the pick-up reel
of this invention, looking toward one end and the front of the
reel, such reel being shown completely separated from the
harvesting machine of which it is a part;
FIG. 2 is an exploded isometric view of the pickup reel, with some
parts being broken away and some being omitted for clarity of
illustration of other parts;
FIG. 3 is an end elevational view of one of the spider assemblies,
with some parts broken away, others omitted, and some parts shown
exploded, for clarity of illustration;
FIG. 4 is an axial sectional view taken substantially along line
4--4 of FIG. 3;
FIG. 5 is a cross-sectional view taken substantially along line
5--5 of FIG. 3;
FIG. 6 is a view similar to FIG. 4, but in the region of the
eccentric mechanism at one end of the pickup reel, with some parts
shown in side elevation; and
FIG. 7 is a detailed view in the region of the drive crank region
between the radial arms of the eccentric mechanism and the radial
bat support arms of the reel.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The pick-up reel 10 is shown to comprise an elongated center tube
12 which replaces the small diameter shaft and truss rods of
conventional pick-up reels such as disclosed by the aforementioned
U.S. Pats. Nos. 2,823,511 and 3,145,520. By way of typical example,
the center tube 12 may be a length of thin wall metal tubing about
6 inches in diameter. A plurality of triangular hub plates 14 are
rigidly secured to the tube 12 at axially spaced apart locations.
Of course, the number of plates 14 and their spacing depends on the
size of pick-up reel involved. A single piece cast (e.g. aluminum)
hub member 16 is associated with each plate 14. As best shown by
FIGS. 3 and 4, each hub member 16 includes a generally triangular
shaped center opening 18 which is sized to be only slightly larger
than the hub plate 14. The hub members 16 are assembled on the tube
12 by sliding them individually endwise relatively over the tube
12. The opening 18 in a given hub member 16 is aligned with a given
hub plate 14 and is then moved relatively past the plate 14, with
the plate 14 moving relatively through the opening 18. When a hub
member 16 is adjacent the hub plate 14 to which it is to be
secured, it is rotated 60.degree. to place apertures formed in the
corners of the hub plate 14 into alignment with related apertures
formed in the hub member 16. The bolts of nut and bolt fasteners 20
are inserted through the apertures and then the nuts are installed
and tightened to make a firm connection. As shown by FIG. 4, when a
hub member 16 is installed it is tight against its hub plate
14.
Each hub member 16 includes a plurality of short raidal arm stubs
22 which are channel shape in cross section (see FIG. 5). An arm
section 24 which is also of channel shape in cross section, is
mated with and is securely fastened to each arm stub 22. The stubs
22 and the sections 24 together define radial support arms 22, 24,
and the sections 24 and the hub members 16 together form
"spiders."
The number of support arms 22, 24 formed by the stubs 22 and the
sections 24 may vary. The illustrated embodiment of pick-up reel 10
is shown to have five support arms 22, 24, i.e. it is a five bat
mode. Another popular model comprises six bats with each spider
having six support arms.
The arms 22, 24 of each spider are in axial alignment with the arms
22, 24 of the other spiders. Lightweight tubular steel bat shafts
26 extend lengthwsie of the pick-up reel in parallelism with the
tube 12 and are secured to the outer ends of the support arms 22,
24. A sturdy hardwood reel bat 28 is secured to each bat shaft 26
and each reel bat 28 carries a plurality of axially spaced apart
spring steel pick-up tines 30.
In preferred form the hub members 16 are of cast aluminum
construction and the arm sections 24 are made from formed sheet
steel. As shown by FIG. 5, each arm stub 22 includes side gussets
32 which are in coplanar parallelism, a web 36 is spaced
parallelism from the gussets 32 and a pair of spaced apart,
dihedrally related, side flanges 38 which are rigidly
interconnected between opposite edge portions of the web 36 and the
inner edge portions of the gussets 32. The arm sections 24 are of
similar construction and each includes a web 40, flanges 42, and
gussets 44.
As best shown by FIG. 5, the lower end portions of the arm sections
24 snugly fit within the arm stubs 22 and nut and bolt type
fasteners 46 firmly secure each mated pair of gussets 32, 44
together. Sectional thickness is provided in the regions of the hub
members 16 which are radially inwardly of the arms stubs 22 and
which during use of the pick-up reel 10 must carry substantial
forces. Cross flanges 47 interconnect between the buses of flanges
38. These flanges 47 extend laterally from a plate section 49 which
is in co-planar parallelism with the webs 36.
This provision of sectional depth axially of the pick-up reel 10
through the arm stubs 22 and the arm sections 24 and through the
central portion of the hub member 16 gives the pick-up reel axial
strength and stability. During working of the pick-up reel,
particularly on a laterally sloping section aground, the pick-up
reel tends to bend. The relatively large diameter yet thin walled
and lightweight center tube 12, and the axially deep hub and arm
portions of the spiders, interconnected only by bat support rods,
provide a structure which adequately resists unwanted bending
without the necessity of using truss rods. As earlier explained,
truss rods interfere with the crop during harvesting and also make
the manufacturing of the pick-up reel more costly and involved.
Another advantageous feature of the pick-up reel of this invention
is that the arm section length and the tube length are the only
parts which must differ from one size reel to another of a
particular bat style. For example, five bat reels according to the
invention may differ in length between eight feet and twenty feet.
Within this range of sizes the only changes which must be made are
in the length of the center tube 12, in the number and spacing of
the spiders, in the length of the bats and their support shafts,
and in the length of the arm sections 24. All other parts of the
five bat reel are common to all sizes of reel. The same is true
with respect to a family of varying size six bat reels. This
characteristic of the pick-up reel materially reduces the inventory
of parts which the manufacturer must have in order to build pick-up
reels of a large number of different sizes.
An end clamp assembly 48 is secured to the outer ends of each arm
section 24. Each end clamp assembly comprises a bearing base 50
(FIG. 3) having a shank portion 52 snugly fittable in the channel
formed between the flanges 42 of the arm section 24. Base 50 also
includes an outer end portion having an outwardly directed
semi-cylindrical recess 54. A half ring section 56 carrying a
complementary semi-cylindrical recess is relatable with the base 50
to define an axially extending circular opening. Base 50 and member
56 may be made from nylon, for example. A U-shaped metal clamp
member 58 fits over member 56 and includes paired openings 60 in
its side portions which are alignable with passageways 62 formed in
the shank portion 52 of base 50. These passageways 62 are also
alignable with paired openings 64 formed in the outer end portions
of the arm sections 24. Bolt members 66 of a pair of nut and bolt
fastener assemblies extend through the openings and passageways 60,
62, 64 when the block 50, the member 56, and the clamp 58 are
assembled on arm section 24.
An improved eccentric mechanism for driving the bats 28 will now be
described, particularly in reference to FIGS. 1, 2, 6 and 7.
It is the purpose of the eccentric mechanism 68, through a system
of parallelogram linkages constituted by its hub assembly 70, the
radiating arms 24' and 22, 24, and cranks 72, to maintain bats 28
and tines 30 in proper vertical position at all times in the
rotative movement of reel 10. To this end, hub assembly 70 rotates,
about an axis eccentric of reel shaft 12, on a coacting eccentric
track roller assembly which will now be described. Firstly, hub
assembly 70 comrpises a pair of side plates 74, 76 which are held
coaxially in a parallel, spaced apart relationship, and between
which a circular arranged series of track follower rollers 78 are
journaled. As shown by FIGS. 2 and 6, rollers 78 are located
between the plate 74, 76 and they are relatively loosely received
on annular bushings 80 which in turn are loosely fitted on spacer
bolts 82. Bushings 80 have a slightly greater axial length than the
rollers 78 (FIG. 6) and therefore act as spacers between the plate
74, 76. The rollers 78 rotate freely about their journals
constituted by the bushings 80.
A main reel shaft 84 is rigidly attached to a plate 85 which in
turn is rigidly attached to the end of center tube 12. This reel
shaft 84 extends endwise outwardly from the tube 12 and is received
in a suitable bearing 86 carried by a mounting socket 88. The
mounting sockets 88, of which there is one at each end of reel 10,
are suitably connected to the harvester (not shown) with which reel
10 is associated. An annular track member 90 is located axially
between plate 85 and bearing 86. Track member 90 loosely fits
through center openings 92, 93 in plates 74, 76. A mounting plate
or strap 94 extends diametrically across the outer end of annular
track member 90 and at its respective ends is rigidly secured to
the track member 90. Another mounting plate 96 extends vertically
upwardly from socket member 88 and contains an arcuate pattern of
bolt receiving openings 98. A similar plurality of openings 100 are
provided in the strap 94. Selective positioning of lock bolts 102
in aligned pairs of the openings 98, 100 permits track member 90 to
be adjustably positioned angularly in relation to reel shaft 84.
This provides a way of adjusting the eccentric device and bat
control elements as a whole to regulate the angularity of the bats
28.
During reel operation, the center tube 12 rotates about its center
axis. The rotary motion is transmitted by the end hub 16 and the
radial arms 24 carried thereby to the bearing assembly 54, 56. The
links 72 structurally connect the upper ends of the arms 24 with
the upper ends of the arms 24'. Thus, orbiting movement of the arms
24 results in an orbiting movement of the arms 25'. The arms 24'
move about the axis of hub assembly 70 which is offset from the
axis of tube 12. The crank arms 72 are rigidly secured to the ends
of the bat shafts 26 (FIG. 2). Rotation of hub assemblies 70 and
its arms 24' about the eccentric axis causes the links 72, and thus
in turn the bats 28, to maintain a substantially constant attitude
throughout all phases of reel rotation. This arrangement, which by
itself is conventional in bat type reels, causes the bats 28 to
assume a generally vertical attitude during rotation.
* * * * *